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Automatic regulation

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315 - Electric lamp and discharge devices: systems

315291000 - CURRENT AND/OR VOLTAGE REGULATION

315294000 - Plural load device regulation

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DocumentTitleDate
20110175551EXAMINATION LIGHT APPARATUS WITH TOUCH-LESS CONTROL - An examination light apparatus including a touch-less control component that enables a user to control the apparatus without requiring physical contact between the user and the apparatus. The apparatus employs an LED control component that is configured to adapt its electrical interface to a variable quantity of light emitting diodes in order to interface with each of a plurality of lamp heads that each can include a unique arrangement and quantity of light emitting diodes. The light emitting diodes (LEDs) provide a high level of light quality, quantity and intensity (luminosity) while requiring low power consumption and low space and weight requirements and are employed without requiring a cooling fan. Uniform mechanical and electrical interfaces between the control component and other portions of the examination lamp provide for efficient and simple manufacturing of various examination light configurations.07-21-2011
20110199023OPERATING CIRCUIT FOR LEDS - An operating circuit is provided for an LED, which receives a voltage, and which supplies a voltage for the LED via a coil, having a first switch clocked by a control/regulating unit. Power is stored temporarily in the coil when the first switch is activated so that the power is discharged via a diode and via the LED when the first switch is turned off. A capacitor is arranged in parallel to the LED and maintains current through the LED during the demagnetization of the coil. A first switch generates a first sensor signal dependent on the current flowing through the first switch, and/or a second sensor unit, which detects whether demagnetization of the coil unit has occurred and generates a sensor signal. The signals are fed to the control/regulating unit and processed. The control/regulating unit reactivates the first switch when the coil is demagnetized and/or the diode is blocking.08-18-2011
20120200235LAMP POWERING TECHNOLOGY - A device is designed for channeling electricity to a lamp, and adjusts downwards the amount of power channeled to the lamp as a function of available electrical energy in the source. In so doing, a reduction in the available energy in the source causes a less proportionate reduction in luminosity of the lamp. This might be accomplished by passing the electricity through a passive network of resistors and diodes on its way down to the lamp. In one example, the electrical energy source may be a battery that is powered by one or more solar panels. In that case, the device may also perform the function of protecting the battery from being overly charged. It channels downwards a greater daily lamp's energy consumption than that of daily electrical charging from the solar panels, when the available battery energy is near its full capacity.08-09-2012
20130026950DRIVER SYSTEM FOR DRIVING A PLURALITY OF LED'S - A driver system for driving a plurality of LED includes a control module having an input for receiving operating data, and at least one driver module for driving at least one of the LED. The driver module includes a hysteretical converter for generating a current to power the LED, and a controller electrically connected to the hysteretical converter for controlling the hysteretical converter.01-31-2013
20130026949LIGHTING DEVICE AND ILLUMINATION APPARATUS USING SAME - An LED lighting device includes: a power source unit for supplying the DC output voltage to a light-emitting diode; a control unit for adjusting the DC output voltage; and a control power source unit for supplying a control power to the control unit. The control power source unit generates the control power with the DC output voltage and has: a current-limiting resistor for limiting an electric current that flows from the power source unit to the control unit; a constant voltage unit for converting a voltage to be applied to the control unit through the current-limiting resistor unit to a constant voltage; and a switching unit for switching a resistance value of the current-limiting resistor unit among a plurality of resistance values.01-31-2013
20100156320LED CIRCUIT WITH HIGH DIMMING FREQUENCY - A LED circuit comprises: an inductor, a group of LEDs, a capacitor, a power MOS and a switching circuit. The inductor is connected to a voltage supply and a first node; the group of LEDs is connected to the first node and a ground potential; the capacitor is connected to the first node and a ground potential; the power MOS is connected to the first node and a ground potential, wherein the gate of the power MOS receives a switching signal such that the capacitor is charged when the power MOS is turn on to further turn on the LEDs and the capacitor is discharged when the power MOS is turn off to turn off the LEDs. The switching circuit is to generate the switching signal.06-24-2010
20100019696POWER CONVERTER - The present invention includes a first DC converter converting AC voltage, into DC voltage while correcting a power factor, and a second DC converter electrically isolating the first DC converter from an LED group load, and converting the DC voltage, into a predetermined DC voltage and supply the resultant voltage to the LED group load. The second DC converter includes a current detection circuit disposed on the secondary side, and detecting current flowing into the LED group load, an error amplifier amplifying an error between a detected current value detected and a reference current value, a signal transmission isolation element transmitting a control signal based on an output signal from the error amplifier, to the primary side, and a switching element transferring power to the secondary side through the transformer by being turned on/off according to the control signal.01-28-2010
20090195190Systems and Methods for Powering a Light Emitting Diode Lamp - In one embodiment, the present invention includes an electronic circuit for providing a power current to an LED lamp. The electronic circuit comprises a logic drive circuit, a VCO, a power switch, and a first current sensor. The VCO is coupled to provide a first logic control signal to the logic drive circuit. The power switch has a first terminal and second terminal coupled to deliver the power current to the LED lamp and a control terminal coupled to receive a power control signal from the logic drive circuit. The first current sensor is coupled to sense a peak current passing through the power switch and coupled to provide a second logic control signal to the logic drive circuit.08-06-2009
20090295308Method for Operating High-Pressure Lamps Without Hotstarting and Luminaire Having Two High-Pressure Discharge Lamps - High-pressure discharge lamps can only be restarted in the hot state at a very high starting voltage. In order to avoid hotstarting, a method for operating high-pressure discharge lamps without hotstarting comprises two high-pressure discharge lamps (12-03-2009
20100164404System and method for a constant current source LED driver - A system and method for providing a constant current source driver for a light emitting diode string. The converter includes a current sensor that derives feedback signal corresponding to a peak current through the light emitting diode string. The feedback signal is used by a controller to vary a duty cycle of the controller to regulate the average current. The controller is operable to regulate the average current as the number of light emitting diodes is increased and/or decreased.07-01-2010
20100164402SELECTIVE CONTROL OF LIGHTING DEVICES - In an arrangement of lighting devices (07-01-2010
20110193494INTEGRATED ON-TIME EXTENSION FOR NON-DISSIPATIVE BLEEDING IN A POWER SUPPLY - An example controller for a switched mode power supply includes a zero-crossing detector, drive logic, and an on-time extension block. The zero-crossing detector is coupled to generate a first signal prior to a zero-crossing of an input voltage of the power supply. The drive logic is to generate a drive logic output signal in response to a feedback signal, where the drive logic output signal is representative of an initial on-time. The on-time extension block is coupled to the zero-crossing detector and to the drive logic to generate a drive signal in response to the drive logic output signal. The drive signal controls switching of a switch to remove charge from a filter capacitor of the power supply. The drive signal is representative of a total on-time of the switch equal to a sum of the initial on-time and an extended on-time, where the extended on-time is responsive to the first signal.08-11-2011
20090121652LIGHT SOURCE MODULE, BACKLIGHT ASSEMBLY HAVING THE SAME, DISPLAY DEVICE HAVING THE SAME AND METHOD FOR REDUCING NUMBER OF WIRES USED IN INTERCONNECT CABLE OF THE SAME - A light source module includes a driving substrate, a plurality of light source blocks and a currents control element. The light source blocks are disposed on the driving substrate, and each of the light source blocks includes at least one light source. The currents control element is disposed on the driving substrate, and has channel terminals for individually controlling driving currents passed through at least two light source blocks. The channel terminals are electrically connected to the at least two light source blocks, respectively. The currents control element is disposed on the driving substrate and individually controls the driving currents applied to the light source blocks, so that a number of wires of a connection cable connected to a light source driving connector is less than the number of light source drive currents being individually controlled.05-14-2009
20130076261PROGRAMMABLE LIGHT-BOX - A light-box for illuminating a printed image includes a light source having a plurality of light-emitting sections, a plurality of contrast information, and a programmable light source controller. The plurality of contrast information is determined according to the contents of the printed image, with each piece of contrast information corresponding to one contrast generated by the plurality of light-emitting sections. Thus, the programmable light source controller drives the plurality of light-emitting sections according to the plurality of contrast information in order to generate luminance variations within different durations.03-28-2013
20130076265ANALOG LED CONTROLLER - The present invention provides a cost effective analog apparatus to enable the user to obtain a display of varied color frequencies using a variety of LED light sources, both in the visual and non-visual ranges, acting in synchronous response to electronic input sources. The present invention provides an analog LED controller that includes a power supply terminal, an input terminal, and a plurality of color LED control circuits. The plurality of color LED control circuits include a first color LED control circuit, one or more nth color LED control circuits and a Nth color LED control circuit, wherein 1N and N=a total number of the color LED control circuits.03-28-2013
20130076263ORGANIC LIGHT EMITTING DIODE LIGHTING SYSTEMS - A lighting system includes a plurality of organic light emitting diode (OLED) devices. By selecting the plurality of OLED devices, or by selectively controlling the plurality of OLED devices, the color characteristics of the lighting system can be tuned. The lifetime of the lighting system can be improved.03-28-2013
20130076262Lighting Device, Lighting Equipment, and Lighting Control System - According to an embodiment, a lighting device includes a first to fourth light sources, a control unit, and an operation unit. The first to fourth light sources have a different combination of a relatively high/low correlated color temperature and a relatively high/low general color rendering index from each other. The control unit controls at least two of a light flux, the correlated color temperature, and the general color rendering index of each of the light sources. The operation unit designates at least one of the correlated color temperature and the general color rendering index of each of the light sources, and executes spectral distribution with the designated correlated color temperature, or general color rendering index.03-28-2013
20130076264DC CONVERTER AND METHOD FOR SELECTING A FREQUENCY OF SAME - In one embodiment, a DC converter has a frequency adjusting device with a frequency selection circuit, a frequency change-over switch (03-28-2013
20130088169CONSTANT-CURRENT LED DRIVER CIRCUIT AND OUTPUT VOLTAGE ADJUSTABLE CIRCUIT AND METHOD THEREOF - A constant-current Light Emitting Diode (LED) driver circuit is provided, and the circuit includes: an output voltage adjustable circuit and at least one path of LED load, wherein the output voltage adjustable circuit comprises: a switch converting main circuit, an output characteristic parameter sampling circuit, and an output voltage controller. The output voltage controller is used to adjust the output voltage of the switch converting main circuit according to the variation relationship between the sampling signal output by the output characteristic parameter sampling circuit and the output voltage, determine the adjustive direction of the output voltage magnitude of the switch converting main circuit according to the change of the sampling signal, adjust the magnitude of the output voltage of the switch converting main circuit according to the preset step, and finally make the output voltage equal to the voltage of one path of LED load with the highest voltage or the difference between the output voltage and the voltage of one path of LED load voltage with the highest voltage within the predetermined range. The present solution implements reducing the connection complexity and power dissipation on the base of controlling the multi-path constant-current LED.04-11-2013
20100039047Drive Device for Performing Electric Power Conversion by Using Switching Element - A drive device includes a primary-side rectifier circuit for rectifying a received alternating-current voltage, a first capacitor for smoothing the rectified voltage, a switching element coupled to a primary winding of a transformer, for converting the smoothed voltage into an alternating-current voltage by turning on and off to be supplied to the primary winding, a secondary-side rectifying-smoothing circuit for rectifying and smoothing an alternating-current voltage induced at a secondary winding of the transformer to be outputted to a load, a switching control circuit for turning on and off the switching element by supplying a drive voltage to a control electrode of the switching element, and a bias circuit for supplying a bias voltage to the control electrode of the switching element, based on a voltage induced at the primary winding.02-18-2010
20130033196LIGHT EMITTING ELEMENT DRIVE APPARATUS AND PORTABLE APPARATUS USING SAME - A light emitting element drive apparatus capable of outputting the lowest voltage satisfying drive conditions and having high light emitting efficiency and low power loss, and a portable apparatus using the same, comprising an LED drive apparatus to which LEDs of different drive voltages required for emitting light are connected in parallel and driving one or more LEDs, wherein the LED drive apparatus 02-07-2013
20130043808MULTI-CHANNEL LED DRIVER CIRCUIT - Provided is a multi-channel LED driver circuit, including a power supply device for providing an independent voltage source; a plurality of regulating circuits connected to the power supply device and the light light-emitting diode arrays for receiving a voltage from the voltage source and providing a plurality of output currents to the light-emitting diode arrays, and thereby generating a plurality of error signals02-21-2013
20130043809LIGHTING NODE SYSTEMS AND METHODS - A lighting node is described. One embodiment of the lighting node includes a lamp, a radio device, and a memory. The lamp is configured for generating illumination. The radio device is configured for radio communication. The radio device is configured to remotely receive a color profile from the controller. The lamp is also configured to generate illumination to substantially match the received color profile. The memory is configured to store a group identifier for the lighting node.02-21-2013
20130043810Modified Dimming LED Driver - A driver circuit produces variable current output for an LED lighting system providing improved dimming capability and greater power efficiency when responding to industry standard lighting dimmers, through the use of an input voltage monitoring circuit which variably controls the current output of a switching regulator. Output current modulation methods such as analog, PWM, Pulse Frequency Modulation, or other digital modulation, and combination or hybrid methods such as that disclosed in U.S. Pat. No. 02-21-2013
20090315480BRIGHTNESS-ADJUSTABLE LED DRIVING CIRCUIT - A brightness-adjustable LED driving circuit includes a rectifying and filtering circuit, a power factor correction power conversion circuit, and a detecting and controlling circuit. The rectifying and filtering circuit is used for filtering and rectifying a brightness adjusting voltage into a first DC voltage. The power factor correction power conversion circuit is electrically connected to the rectifying and filtering circuit and at least one LED string for generating an output current required for powering the at least one LED string. The detecting and controlling circuit detects phase data of the brightness adjusting voltage and the output current generated by the power factor correction power conversion circuit. The detecting and controlling circuit generates a control signal to the power factor correction controller according to the phase data of the brightness adjusting voltage, so that the magnitude of the output current is changed according to the phase data of the brightness adjusting voltage.12-24-2009
20130038243CURRENT-CONTROLLED STAGES, CONSTANT CURRENT CONTROL SYSTEMS, AND CURRENT CONTROL METHODS FOR DRIVING LEDS - Disclosure has current-controlling stages, backlight systems and control methods for driving LEDs. A disclosed current-controlling stage has a current controller and a feedback apparatus. The current controller is coupled to a light-emitting device, for making the driving current through the light-emitting device substantially a predetermined value. The current controller has a control node, at which a control voltage substantially controls the driving current. The feedback apparatus influences a compensation voltage based on the control voltage to keep the control voltage substantially around a first predetermined value. The compensation voltage substantially determines an output power of a voltage-controlling stage.02-14-2013
20130038242BIAS VOLTAGE GENERATION USING A LOAD IN SERIES WITH A SWITCH - A power supply includes a load connected in series with a switch. The power supply uses the load in series with the switch to maintain a substantially constant voltage. The voltage may be used as a voltage bias and supplied to a controller module that is used to control switching of the switch. The load is operable to maintain a substantially constant voltage at an input terminal of the load and also to function as a current sink. The load may also perform an additional function, such as provide auxiliary lighting or operate as a cooling mechanism for the power supply and/or a lighting system that includes the power supply.02-14-2013
20130038244LIGHTING DEVICE - The disclosed lighting device gradually adjusts from an incandescent bulb color having a 30% dimming rate to a daylight color having a 100% dimming rate. The overall dimming rate is changed to a linear shape, and the ratio of the dimming rates of the incandescent bulb color and the daylight color is adjusted. When changing from the incandescent bulb color to the daylight color, the color is changed to an intermediate color that mixes the incandescent bulb color and the daylight color, and then ultimately is changed to the daylight color, and so it is possible to change the dimming rate without causing discomfort or annoyance in humans, and a comfortable and natural light environment is achieved.02-14-2013
20130134903LED LAMP WITH HALF WAVE DIMMING - An LED lamp assembly includes a power supply configured to receive an input power signal and provide a DC lamp current, a dimming controller coupled to the power supply and configured to adjust the DC lamp current, and an LED lamp coupled to the DC lamp current. The dimming controller is configured to determine if full brightness or dimmed brightness is required based at least in part on the input power signal. The DC lamp current is maintained at a first level when full brightness is required and at a second level when dimmed brightness is required.05-30-2013
20130082624LED DRIVER SYSTEMS AND METHODS - A light-emitting diode (LED) driver system includes a control circuit that provides a waveform for driving a power transistor to generate a regulated current through one or more LEDs, and an error amplifier that generates an output compensation signal based on a comparison of a desired regulated current and an actual regulated current through the one or more LEDs. The output compensation signal is used to set an output compensation voltage that sets the duty cycle of the waveform. The LED driver system further comprises a dimming control device configured during a dimming control mode to alternate between dimming-on time periods and dimming-off time periods, and a sample and hold switch having a first state for holding the output compensation voltage fixed during each dimming-off time period, and a second state for restoring the error amplifier to its previous dimming-on operating state upon returning to each subsequent dimming-on time period.04-04-2013
20130082623LIGHTING SYSTEM AND CONTROL METHOD THEREOF - A lighting system according to an embodiment includes a light source unit and a control circuit. The light source unit includes first, second, and third light sources. The control circuit controls an optical output of the light source unit with a predetermined color temperature by controlling the respective optical outputs of the first, second, and third light sources, and sets the optical output of the light source unit when any one of the first, second, and third light sources becomes the minimum optical output to the minimum optical output at the time of reducing the optical output of the light source unit in a state where the optical output of the light source unit maintains the predetermined color temperature.04-04-2013
20130082622METHOD FOR MIXING LIGHT OF LED CLUSTER - The method for mixing light of LED cluster is disclosed. Firstly, a plurality of LED cluster are provided, then the step is importing the related data, then the step for the continuous genetic algorithm and the merit function are respectively carried out, finally the step for exporting data is achieved. The applied field of the invention is able to comprise LED cluster, fluorescence light source array, and fluorescence lamp array, as well as the other light source field etc.04-04-2013
20130134904DIMMING DRIVING SYSTEM AND DIMMING CONTROLLER - Disclosed are dimming driving system and a dimming controller. A disclosed dimming driving system has a transformer, a lighting device, and a dimming controller. The transformer has a primary winding and a secondary winding inductively-coupled to each other. The secondary winding is coupled to an output power line and secondary ground, both coupling to and powering the lighting device. The dimming controller is coupled to the secondary winding for controlling current flowing through the lighting device according to a voltage drop of the secondary winding.05-30-2013
20130134905COLOR MIXING SYSTEM WITH BUCK-BOOST AND FLYBACK TOPOLOGIES - A system includes a first solid-state lamp that generates a first illuminated output having a first color. A second solid-state lamp generates a second illuminated output having a second color. The second illuminated output is mixed with the first illuminated output to generate a third illuminated output having a third color. An inductor or a transformer includes a primary coil and a bias coil. A first circuit includes the primary coil and a first switch. The first circuit supplies power to the first solid-state lamp. A second circuit includes the bias coil and a second switch. The second circuit supplies power to the second solid-state lamp. A control module alters the third color including controlling (i) a state of the first switch to adjust current supplied to the first solid-state lamp, and (ii) a state of the second switch to adjust current supplied to the second solid-state lamp.05-30-2013
20090045757DISCHARGE LAMP LIGHTER - A discharge lamp lighter has an abnormality detecting circuit 02-19-2009
20130088167LIGHT EMITTING SYSTEM CAPABLE OF COLOR TEMPERATURE STABILIZATION - A light emitting system includes: first, second, and reference light emitting components having first, second, and reference forward voltages when driven under constant current, respectively; an instrumentation amplifier for generating a temperature detection voltage with a magnitude dependent on the reference forward voltage of the reference light emitting component; first and second compensation voltage modules each generating a respective one of first and second compensation voltages based at least on the temperature detection voltage; and first and second power control modules providing first and second driving currents through the first and second light emitting components according to the first and second compensation voltages and the first and second forward voltages, respectively.04-11-2013
20130049636Electronic Device for Controlling Lighting Effects Using an Audio File - An electronic device is provided, which comprises one or more light groupings, each light grouping including one or more light sources, and audio processing circuitry adapted for interpreting an audio file. The audio file includes one or more instrument definitions exclusively assigned to a corresponding one of the one or more light groupings. The audio file further includes one or more note definitions associated with at least one of the one or more instrument definitions exclusively assigned to the corresponding one of the one or more light groupings, where a value associated with each of the one or more note definitions controls the color displayed by the one or more light sources within the associated exclusively assigned light grouping. In some instances, one or more commands for the instrument definitions assigned to the corresponding one of the one or more light groupings can include commands for at least one of volume definitions, note velocity definitions and modulation definitions, wherein the light intensity of the color displayed by the one or more light sources is controlled in accordance with the at least one of the volume definitions, note velocity definitions and modulation definitions. In some instances, the note definitions can include relative start times and end times, which when associated with the instrument definitions assigned to each of the one or more lighting groups affects the start time and the end time of the illumination of the light sources within the corresponding light grouping.02-28-2013
20130088168COMMISSION OF DISTRIBUTED LIGHT FIXTURES OF A LIGHTING SYSTEM - Apparatuses, methods, apparatuses and systems for commissioning a light fixture are disclosed. One method includes receiving, by the light fixture, a message from a central controller, wherein reception of the message puts the light fixture into a known condition, establishing communication between the light fixture and a user, and communicating, by either the light fixture or the user, a location of the user at a time of the established communication, to the central controller, thereby allowing the central controller to record a location of the light fixture.04-11-2013
20090322251LARGE AREA LIGHTING - Within lighting tiles (12-31-2009
20100134045COLD CATHODE TUBE LIGHTING DEVICE - A cold cathode tube lighting device prevents emission-position-dependent unevenness from occurring in the brightness of light emitted from the cold cathode tube lighting device and includes a plurality of discharge tubes connected in parallel; ballast capacitors each integrally attached to a respective one the plurality of discharge tubes; power supplies arranged to that supply power to the plurality of discharge tubes; and a voltage detection unit connected to the plurality of discharge tubes to detect voltages between pairs of internal electrodes of the plurality of discharge tubes. The power supply to the plurality of discharge tubes is controlled according to the voltages detected by the voltage detection unit.06-03-2010
20130069561COLOR MIXING OF ELECTRONIC LIGHT SOURCES WITH CORRELATION BETWEEN PHASE-CUT DIMMER ANGLE AND PREDETERMINED BLACK BODY RADIATION FUNCTION - A lighting system includes methods and systems to mix colors of light emitted from at least two LED emitters. In at least one embodiment, the lighting system includes a controller that responds to phase-cut angles of the dimming signal and correlates the phase-cut angles with a predetermined black body radiation function to dynamically adjust a color spectra of the mixed light in response to changes in phase cut angles of the phase-cut dimming level signal. In at least one embodiment, the controller utilizes the predetermined black body radiation function to dynamically adjust the color spectra of the mixed, emitted light in response to changes in phase cut angles of a phase-cut dimming level signal. In at least one embodiment, the predetermined black body radiation function specifies correlated color temperatures (CCTs) that model the CCTs of an actual non-LED based lamp, such as an incandescent lamp.03-21-2013
20090302782SYSTEMS AND METHODS FOR RULES BASED, AUTOMATED LIGHTING CONTROL - A lighting control system comprising a plurality of intelligent switches designed to replace a conventional light switch, each of the intelligent switches including a receiver configured to receive communication signals that include rules based instructions for controlling one or more lighting circuits; a circuit interrupter configured to control the amount of current flowing to a lighting circuit; a memory configured to store the rules based instructions; and a processor coupled with the receiver, memory, and circuit interrupter, the processor configured to control the operation of the circuit interrupter based on the rules based instructions stored in memory.12-10-2009
20090302781COLOR MANAGER FOR BACKLIGHT SYSTEMS OPERATIVE AT MULTIPLE CURRENT LEVELS - A color manager for use with a luminaire constituted of a plurality of different colored light emitting diode based sub-luminaires arranged to produce a combined light. The color manager is constituted of a sampler arranged to output an electrical representation of the optical output of the luminaire, a converter coupled to the output of said sampler and operatively associated with a current selector arranged to select the driving current level of the luminaire from a plurality of current levels. The converter is arranged to convert said electrical representation to a pre-determined calorimetric system in cooperation with a calibration matrix whose values are selected responsive to the selected driving current level. The color manager further comprises a driver operatively associated with the luminaire, the converter and current selector and arranged to drive the luminaire in accordance with the driving current level as selected by the selector.12-10-2009
20120217898ELECTRICAL LOAD DRIVING CIRCUIT - Circuits and methods for driving electrical loads, where each is driven according to a desired current. A circuit comprising a switch mode converter comprising a transformer with primary and secondary windings, the primary connected to a voltage supply via one or more input control switches; output circuits, each comprising a switch connecting a load to an output of the secondary, each load series connected with a respective switch and in parallel with a capacitor; and a switching control circuit for control of each of the output circuit switches and for sensing a current through the loads. The switching control circuit operates the output circuit switches to maintain set current through the loads, the switching control circuit configured in successive output cycles of the switch mode converter to operate each output circuit switch in an order dependent on a forward voltage of each of the respective loads.08-30-2012
20120217900LED DRIVING CIRCUIT, LED ILLUMINATION APPLIANCE, LED ILLUMINATOR, AND LED ILLUMINATION SYSTEM - Provided is an LED driving circuit (08-30-2012
20120217899LIGHTING DEVICE AND LUMINAIRE - According to one embodiment, a lighting device includes a control circuit that includes a threshold for a case where a pair of the illumination lamps are connected in series between a positive output end and a negative output end of a power supply circuit, and a threshold for a case where one illumination lamp is connected between the positive output end and the negative output end of the power supply circuit. The control circuit determines the connected lamp number of the illumination lamps to a direct-current power supply device based on a voltage between the positive output end and the negative output end of the power supply circuit and a voltage between a non-potential connection end and the positive output end or the negative output end, and selects the threshold corresponding to the connected lamp number to control the direct-current power supply device.08-30-2012
20130057179Circuit and Method for Operating a Lighting Unit and a Luminaire Having a Circuit of this kind - A circuit for actuating a lighting unit comprising: (03-07-2013
20090267540Modular Lighting Systems - In embodiments of the present invention, a method and system is provided for designing improved intelligent, LED-based lighting systems. The LED based lighting systems may include fixtures with one or more of rotatable LED light bars, integrated sensors, onboard intelligence to receive signals from the LED light bars and control the LED light bars, and a mesh network connectivity to other fixtures.10-29-2009
20090267539BACKLIGHT MODULE - The invention provides a backlight module comprising a plurality of lighting units and at least one balance transformer. Each of the lighting units comprises a first electrode terminal and a second electrode terminal, and the first electrode terminals are coupled to a power source. The at least one balance transformer is coupled to at least one of the second electrode terminals. The primary side of the at least one balance transformer could be connected to each other to form a close loop. Accordingly, the backlight module could be used for large size panel.10-29-2009
20090267536Fluorescent lamp driver circuit - A fluorescent lamp driver circuit is provided. The fluorescent lamp driver circuit uses reversed current detecting signal to achieve feedback control and circuit protection so as to simplify the driver circuit and reduces the number of the required electronic components. The driver circuit needs a single control unit to control the whole circuit, which not only reduces cost, but also simplifies circuit design.10-29-2009
20090267538LIGHTING SYSTEM FOR AVIONICS APPLICATIONS AND CONTROL METHOD THEREOF - Disclosed herein is a lighting system, in particular for an avionics apparatus, having at least a light source and a control unit coupled to the light source and controlling operation thereof based on a management PWM signal; the management PWM signal may have a shape such as to limit radio frequency emissions. According to an embodiment, the lighting system has an interface unit coupled to the light source and receiving the management PWM signal from the control unit; during a lighting management mode, the management PWM signal carries management information for controlling the light source, and the interface unit is operable to decode the management information, for driving the light source; in particular, the control unit codes the management information using a first waveform parameter of the management PWM signal, and at least a second waveform parameter of the management PWM signal, different from the first waveform parameter. According to a further embodiment, the lighting system has at least one storage element coupled to the light source, and a transmission protocol is associated to the management PWM signal, envisaging a bidirectional communication between the control unit and the interface unit, by means of which management data are read from, and/or written to, the storage element.10-29-2009
20120223657Semiconductor Light Emitting Devices Having Selectable And/or Adjustable Color Points and Related Methods - Semiconductor light emitting devices include a first string of at least one blue-shifted-yellow LED, a second string of at least one blue-shifted-green LED, and a third string of at least one LED that emits light in the red color range. These devices include at least a first circuit that is configured to provide an operating current to at least one of the first LED or the second LED and a second circuit that is configured to provide an operating current to the third light source. The drive currents supplied by the first and second circuits may be independently controlled to set a color point of the light emitting device at a desired color point.09-06-2012
20110012533COLOR LED DRIVER - Disclosed herein is a color LED driver, which is capable of being implemented by a compact structure without a feedback structure and accompanying a small size and low cost, by directly connecting a negative temperature coefficient (NTC) thermistor to a driving current path of a color LED applied to an LCD backlight to compensate a characteristic variation of the LED due to a variation in a temperature. The color LED driver includes a driving constant voltage source 01-20-2011
20130063046CONFIGURATION UNIT AND METHOD FOR CONFIGURING A PRESENCE DETECTION SENSOR - A configuration unit (03-14-2013
20130162173LIGHT SOURCE CIRCUIT BOARDS - Methods for manufacturing a light source circuit board having one or more light emitting components that include providing at least one circuit component on a light source circuit board, wherein the at least one circuit component has an electrical circuit constant that specifies one or more performance parameters for the light source. The methods also include measuring the electrical circuit constant of the at least one circuit component. The methods also include identifying one or more performance parameters for the light source based on the measured electrical constant.06-27-2013
20090237008LEFT/RIGHT TURN INDICATOR FOR VEHICLE - In response to a left turn operation of a turn signal lever when left and right headlights provided on the left and right sides of a front part of a vehicle are turned on, a left turn signal light is turned on, and, at the same time, a left main light is made into a turned-off state corresponding to left turn indication. When a right turn operation of the turn signal lever is performed, a right turn signal light is turned on, and, at the same time, a right main light is made into a turned-off state corresponding to right turn indication in response to this operation. In a dark environment such as nighttime, oncoming vehicles and pedestrians can surely know the left or right turning of the vehicle based on the change in the main lights from a normal lighting state to the turned-off state.09-24-2009
20090237006APPARATUS, SYSTEM, AND METHOD FOR DEVICE GROUP IDENTIFICATION - An apparatus, system, and method are disclosed for identifying and differentiating among multiple groups of devices, comprising at least two LEDs, a controller, and a blending medium. The at least two LEDs emit a wavelength of light that is different from a wavelength of each other LED. The controller drives the at least two LEDs to each emit light at specified intensities in response to a color identifying value. The blending medium combines the light emitted by the at least two LEDs into an identifying color that identifies a group of devices.09-24-2009
20090237007LIGHT-EMITTING DIODE DRIVING CIRCUIT AND SECONDARY SIDE CONTROLLER FOR CONTROLLING THE SAME - A light-emitting diode (LED) driving circuit and a secondary side controller for controlling the same control an output voltage of the LED driving circuit at a first driving voltage or a second driving voltage. When the output voltage is controlled at the first driving voltage, an LED module driven by the LED driving circuit is in a stably lighting state; and when the output voltage is controlled at the second driving voltage, the output voltage is approximately a threshold voltage of the LED module but higher than zero volt, so that the LED module is close to not emitting light. Therefore, in a dimming operation, the variation of voltage applied across the LED module is smaller than that in the conventional LED driving circuits to thereby protect the LED module against an excessive voltage stress and avoid the problem of inaccurate dimming.09-24-2009
20120229048LUMINAIRE SYSTEM - A luminaire produces lighting as a series of frames of constant spectral content. The luminaire includes an interpreter for executing scripts that describe the spectral contents of respective frames. The scripts may include spectral data and executable code for altering the spectral data. In particular, a frame descriptor may include data for a frame, a repeat count indicating a number of frames, and an identifier for a subroutine to be called for each frame described by the frame descriptor. One or more luminaires can be network connected to one or more computers running applications providing user interfaces for script generation. A standardized interface can control communications with the luminaires and convert scripts from applications to a format that luminaires can interpret.09-13-2012
20110043138Light Emitting Device Capable of Dynamically Regulating Output Voltage and Related Control Method - A light-emitting diode (LED) device capable of dynamically regulating output voltage is disclosed. The LED device includes a plurality of LED chains, a voltage converter, a current driving unit, a loop control unit. The loop control unit is coupled to the LED chains and the voltage converter, and includes a voltage selection unit, an error amplifier, and a conversion controller. The voltage selection unit is utilized for generating a plurality of candidate voltages according to a threshold voltage and a plurality of headroom voltage voltages corresponding to the LED chains and the current driving unit, and selecting a feedback voltage from the candidate voltages. The error amplifier generates an error voltage signal according to a reference voltage and the feedback voltage. The conversion controller generates a voltage control signal according to the error voltage signal to control the voltage conversion of the voltage converter.02-24-2011
20110025232SEAMLESS FOLDABLE DISPLAY DEVICE - A foldable display device is designed so that a junction between at least two display panels connected to each other is not visibly seen. The display device displays an image on a plurality of display panels that are connected together. Pixels near the junction between every two adjacent display panels of the at least two display panels are smaller and have a higher brightness than the other pixels.02-03-2011
20100171442Light Emitting Diode Based Lighting System With Time Division Ambient Light Feedback Response - A lighting system includes time division light output sensing and adjustment for ambient light. In at least one embodiment, time division light output sensing involves modulating power to a light emitting diode (LED) set, and the set of LEDs includes one or more LEDs. In at least one embodiment, each LED in the LED set is included in a single lamp, and, in at least one embodiment, the set of LEDs is contained in multiple lamps. In at least one embodiment, for each lamp, a controller modulates power to the LED set by selectively reducing power to the LED set using time division algorithm to allow a light sensor to sense the brightness of ambient light with a reduced contribution from the LED set. In at least one embodiment, a lighting system also includes time division light output sensing and adjustment for different spectra LEDs.07-08-2010
20110279060Control Circuit with Fast Recovery - The invention concerns a control circuit arranged to generate a control signal (V11-17-2011
20120032612THERMAL CONTROL OF SOLID STATE LIGHT SOURCES BY VARIABLE SERIES IMPEDANCE - A thermal protection circuit, and system and method including same, is provided. The circuit includes a variable impedance circuit configured to be coupled to a constant current source and a plurality of solid state light sources. The constant current source provides a current to the plurality of solid state light sources and provides an output voltage to establish a supply voltage for the circuit. The circuit also includes a temperature sensor configured to sense a temperature of the plurality of solid state light sources. The circuit also includes a control circuit configured to receive the supply voltage and to drive the variable impedance circuit based on the sensed temperature, to adjust the current to the plurality of solid state light sources when the supply voltage is a least a minimum supply voltage of the control circuit.02-09-2012
20110285320POWER SUPPLY FOR AN AIRFIELD LED SIGN - In an example embodiment, there is disclosed a power supply that comprises a rectifier for receiving an alternating current, a boost circuit coupled to the rectifier and receiving the rectified alternating current, and a processor coupled to the boost circuit. The processor is operable to control the operation of the boost circuit. The processor is operable to control the boost circuit to provide a constant, regulated current to a load by controlling the voltage at the output of the boost circuit. The constant, regulated current provided to the load is independent of the magnitude of the alternating current11-24-2011
20110285319LIGHT SOURCE MODULE - A light source module is provided. The light source module includes a full wave rectifier, a constant current output integrated circuit (IC) and at least one high operating voltage light emitting diode (HVLED) die coupled between the constant current output IC and a ground. The full wave rectifier generates a rectified signal according to an alternating current (AC) power. The constant current output IC outputs a constant current signal according to the rectified signal. A brightness of the HVLED die is determined by the constant current signal.11-24-2011
20110285318Compact and efficient driver for multiple light emitting diodes (LEDs) - A method includes receiving a variable reference voltage at a power converter and generating a regulated output voltage based on the variable reference voltage. The method also includes sequentially driving multiple sets of light emitting diodes (LEDs) using the regulated output voltage, where each set includes at least one LED. The variable reference voltage varies based on the set of LEDs being driven. For example, the method could include receiving a first reference voltage, generating a first output voltage based on the first reference voltage, and driving a first set of LEDs using the first output voltage. The method could then include receiving a second reference voltage, generating a second output voltage based on the second reference voltage, and driving a second set of LEDs using the second output voltage. At least one additional set of LEDs could be driven concurrently with the sequential driving of the multiple sets of LEDs.11-24-2011
20110285317METHOD AND CIRCUIT ARRANGEMENT FOR CONTROLLING A LOAD - A method for control and discharge control of an electrical load, in which the control and discharge occurs by means of a control frame and a discharge frame, and in which one control frame and one discharge frame represent one switching cycle for the electrical load. A plurality of switching cycles are arranged following one another, wherein a controllable switch is connected in parallel to each point load so that each point load can be switched independently of the other point load during the switching cycle. A control unit monitors the electrical current flowing in the electrical load, and the control unit uses an actual/setpoint comparison to control the current to an adjustable setpoint so that a current that is as constant as possible flows into the electrical load. The controllable switches switch on the point loads during the control frame of a switching cycle, and the controllable switches switch off the point loads during the discharge frame of a switching cycle.11-24-2011
20110285316Error Amplifier and LED Circuit Comprising the Same - An error amplifier and a LED circuit comprising the same are provided. The LED circuit comprises an inductor, a group of LEDs and a power MOS connected to the inductor, an error amplifier and a pulse width modulator controlling the gate of the power MOS according to an error amplifier output. The error amplifier comprises a differential input stage, an output stage having a NMOS, a PMOS and an adjusting current source connected to the gate of the PMOS. During a first operation mode, a control voltage makes the adjusting current source turn on, and during a second operation mode, the control voltage makes the adjusting current source turn off.11-24-2011
20100213872SYSTEM AND METHOD FOR ELECTRONIC ADAPTIVE FRONT-LIGHTING - A system and method relates to electronic adaptive front-lighting of a vehicle, including at least one fixed solid state light source. The fixed solid state light source is configured to illuminate a front peripheral region of a vehicle. In addition, the fixed solid state light source is integrated with a daytime running light module of the vehicle.08-26-2010
20120098462LED Driver Circuit, Light Source Device, And LCD Device - An LED driver circuit which provides a cost reduction is provided by employing a circuit configuration which allows a size reduction. In at least one example embodiment, the LED driver circuit includes a first switching element, a second switching element, a sense resistor, a sensing unit, a calculator, and a driver. The plurality of LEDs, the first switching element, the second switching element, and the sense resistor are coupled to each other in series in this order. The sensing unit receives a voltage at a node between the second switching element and the sense resistor, and generates voltage data representing the voltage. The calculator calculates a temporal average of a current flowing through the LEDs based on the voltage data, and generates current data corresponding to the temporal average. The driver drives the first switching element and the second switching element based on the current data.04-26-2012
20120098461POWER SUPPLY DETECTING CIRCUIT - A phase sequence detecting apparatus for a three-phase alternating current (AC) power includes a signal converting module and a phase sequence indicating module comprising plural indicating lights. The phase sequence detecting apparatus further includes a control module. The signal converting module is configured to receive three phase power signals output from the three-phase AC power, configured to convert the three phase power signals and send the converted signals to the control module. The control module controls power-on sequence of the indicating lights according to signals output from the signal converting module.04-26-2012
20100090617METHOD AND DEVICE FOR COMPOSING A LIGHTING ATMOSPHERE FROM AN ABSTRACT DESCRIPTION AND LIGHTING ATMOSPHERE COMPOSITION SYSTEM - The invention relates to composing a lighting atmosphere from an abstract description for example a lighting atmosphere specified in XML, wherein the lighting atmosphere is generated by several lighting devices, by automatically rendering the desired lighting atmosphere from the abstract description. The abstract description describes the type of light with certain lighting parameters desired at certain semantic locations at certain semantic times. This abstract atmosphere description is automatically transferred to a specific instance of a lighting system (04-15-2010
20090128053Apparatus and Technique for Modular Electronic Display Control - The present invention discloses apparatus and techniques for modular backlighting control of a display. The display includes a number of strings of LEDs. The display is divided into several sections, and each section includes one or more strings of LEDs. A local controller is assigned to each section. The local controller receives feedback signals from the strings of LEDs in its sections and controls the drive voltages and drive currents of those strings. The local controllers communicate with each other and also with the main system controller.05-21-2009
20110215737Voltage Conversion Circuit and Voltage Conversion Method - A voltage conversion circuit comprises a first and a second output (O09-08-2011
20110215736METHOD AND SYSTEM FOR LIGHTING CONTROL AND MONITORING - Embodiments of the present invention are directed to control of lighting systems at individual-light-fixture, local, regional, and larger-geographical-area levels. One embodiment of the present invention comprises a hierarchical lighting-control system including an automated network-control center that may control up to many millions of individual lighting fixtures and lighting elements, regional routers interconnected to the network-control center or network-control centers by public communications networks, each of which controls hundreds to thousands of individual light fixtures, and light-management units, interconnected to regional routers by radio-frequency communications and/or power-line communications, each of which controls components within a lighting fixture, including lighting elements. LED-luminaire drivers, sensors, and other devices.09-08-2011
20110215735METHOD AND SYSTEM FOR AUTOMATED LIGHTING CONTROL AND MONITORING - Embodiments of the present invention are directed to automated control of lighting systems at individual-light-fixture, local, regional, and larger-geographical-area levels. One embodiment of the present invention comprises a hierarchical lighting-control system including an automated network-control center that may control up to many millions of individual lighting fixtures and lighting elements, regional routers interconnected to the network-control center or network-control centers by public communications networks, each of which controls hundreds to thousands of individual light fixtures, and light-management units, interconnected to regional routers by radio-frequency communications and/or power-line communications, each of which controls components within a lighting fixture, including lighting elements, associated ballasts, sensors, and other devices.09-08-2011
20090189544System with flicker control and method of reducing flicker generated by a system - A system is disclosed that is designed to be connected to an electrical power supply. The system comprises a plurality of electric load component comprising stages for cooperatively producing an output (T07-30-2009
20100102754LED LAMP ASSEMBLY - An LED lamp assembly includes a lighting pole and an LED lamp mounted on the lighting pole. The lighting pole includes a holding cylinder, a plurality of light-guiding plates received in the holding cylinder and a light emitting member surrounded by the light-guiding plates. The holding cylinder defines a plurality of through holes in a circumference sidewall thereof. A sensor is connected to the LED lamp, whereby the LED lamp lightens only when an object moves approaching the LED lamp assembly. Each light-guiding plate is semitransparent. Light generated by the light emitting member partly transmits through a corresponding light-guiding plate and partly reflected thereby, whereby the lighting pole radiates an even light through the holes thereof. The lighting pole constantly radiates the even light during the operation of the LED lamp assembly.04-29-2010
20100259192BUCK-MODE BOOST CONVERTER WITH REGULATED OUTPUT CURRENT - An LED driver circuit that includes a buck-mode boost converter that provides a regulated output current and that requires only a single connection to each channel of LEDs. The buck-mode boost controller may include a current regulator that includes an integrator. The current regulator may be configured to integrate a difference between a reference signal that is representative of the desired level of the average current through the electronic power switch and a detected signal that is representative of the actual current that is being delivered to the buck-mode boost circuit through the electronic power switch. The reference signal to the integrator may not change during operation of the buck-mode converter. The current regulator may be configured to deactivate the integrator and/or to disconnect the detected signal from the integrator while the electronic power switch is off.10-14-2010
20110266973SPIDER - The Spider is a lighting control device that has the capability of controlling a light source from multiple switches if pressed randomly, making it possible for a user to turn lights on and off using multiple switches. This device may be placed virtually anywhere within a room to allow the user to conveniently and safely turn their lights on and off with ease, from the user-preferred location(s). The device also features a time delay, which enables the user to turn on a light and then preset the amount of time before it automatically turns off. The invention consists of an enclosure with touch-pad capability and may include numerous ICs, capacitors, IC regulators, resistors, regular electrical switches, AC outlets, push-button switches, and a transformer for the power supply. The device may manipulate up to 12 push-button switches or more in certain embodiments.11-03-2011
20090146586Power supply for external electrode fluorescent lamps - The present invention provides a power supply circuit for providing power for a plurality of external electrode fluorescent lamps (EEFLs) connected in parallel, comprising a controllable voltage regulator for receiving an input power signal and for providing a regulated voltage signal, an output inverter and a resonant circuit connected to receive the regulated voltage signal and for providing a resonant frequency signal, a voltage transformation stage for receiving the resonant frequency signal for transforming the resonant frequency signal to a power voltage signal capable of driving a plurality of EEFLs connected in parallel, wherein the controllable voltage regulator is connected to receive the resonant frequency signal and is responsive thereto to keep the resonant frequency signal within an acceptable operating voltage range to power the EEFLs independently of the number of EEFLs connected to receive the power voltage signal.06-11-2009
20080315792METHOD AND CIRCUIT FOR CORRECTING A DIFFERENCE IN LIGHT OUTPUT AT OPPOSITE ENDS OF A FLUORESCENT LAMP ARRAY - A method and electrical circuit corrects a difference in light output at opposite ends of a fluorescent lamp array. An electrical circuit for correcting a difference in light output at the ends of a fluorescent lamp array includes a microcontroller and firmware for generating a first pulse-width modulated inverter switch control signal having a first duty cycle that may be varied by computer program instructions executed by the microcontroller. An inverter bridge driver is coupled to the microcontroller for generating a switching signal for a first inverter bridge from the first pulse-width modulated inverter switch control signal to generate a first inverter voltage having a magnitude determined by the first duty cycle.12-25-2008
20080309254Backlight Unit for Display Service - Electronic devices/equipment, such as CD or MP3 players, PDAs, organizers, mobile phones, often include a backlight display unit. The area of the backlight unit can be divided into segments. The intensity of light for backlighting each such segment can be controlled separately, which may reduce the energy consumption of the display unit.12-18-2008
20100123413METHODS AND SYSTEMS FOR CONTROLLING THE ACTIVATION OF AGRICULTURAL VEHICLE LIGHTING - An agricultural vehicle lighting system includes a plurality of HID lamps and a lighting controller. The HID lamps are configured to be mounted to the agricultural vehicle and powered by an existing electrical circuit of the agricultural vehicle. The lighting controller controls activation of the lamps and is configured to initially activate a first set of the lamps and to subsequently activate a second set of the lamps once it determines that the electrical circuit has the capacity to safely handle both the first and second sets of the lamps. The lighting controller may determine that the electrical circuit has sufficient capacity by determining when current drawn from the first set of the lamps drops below a threshold current level. Alternatively, the lighting controller may determine that the electrical circuit has sufficient capacity by delaying activation of the second set of the lamps for a time period corresponding to a current decay characteristic of the lamps.05-20-2010
20100079088Power systems with current regulation - A power system includes a current regulator coupled to a load and for generating an output current having a substantially constant ripple magnitude, and for adjusting the output current according to a sense signal indicative of the output current. In addition, the power system includes a filter element coupled in parallel with the load and for passing an AC (alternating-current) portion of the output current. Furthermore, the power system includes a current sensor coupled between ground and the parallel-coupled filtering element and load, and for providing the sense signal indicative of the output current.04-01-2010
20090295310Dual head inspection lamp - A dual head lamp having a housing, a first head removably attached to the first end of the housing, and a second head removably attached to the second end of the housing. The first head includes at least one non-white light emitting diode configured to emit light with a wavelength of between 250 nm and 500 nm for fluorescent inspection. The second head includes at least one light emitting diode the emits light having a wavelength that is different than the wavelength of the light emitted from the non-white light emitting diode in the first head. The second head is preferably arranged to emit light in a direction opposite the direction of the non-white light emitting diode. A removable battery compartment is within the housing and configured to hold one or more batteries. A button in communication with a circuit allows for control of power to the light emitting diodes.12-03-2009
20090206773Interactive led lighting system for entertainment and network thereof - An interactive LED lighting system for entertainment and a network thereof comprise a plurality of LED light controllers being capable of connecting with a wireless operating end, a plurality of kinetic energy sensors or wireless remote controls for receiving commands output by the wireless operating end, the kinetic energy sensors or the wireless remote controls so as to generate RGB signals and in turn make LED lamps connected with the LED light controllers change colors they emit.08-20-2009
20110266972Dynamic current equalization for light emitting diode (LED) and other applications - A system includes multiple dynamic current equalizers (DCEs). Each DCE includes a first control loop configured to regulate a current through a circuit branch associated with the dynamic current equalizer. The first control loop includes a first amplifier having two inputs. Each DCE also includes a second control loop configured to regulate a control signal. The second control loop includes a second amplifier having two inputs coupled to the inputs of the first amplifier. The first amplifier has an input offset compared to the second amplifier. The DCEs are configured such that one DCE regulates the control signal while one or more other DCEs regulate the currents through the associated circuit branches based on the control signal. The DCEs can be configured to achieve one or more ratios between multiple currents flowing through multiple circuit branches, where the one or more ratios are defined by resistances coupled to the DCEs.11-03-2011
20100123414Variable Lighting Zones - A zoned lighting space (05-20-2010
20110169423Circuit and Method for Controlling Light Emitting Device, and Integrated Circuit Therefor - The present invention provides a transistor switch on a light emitting device channel, the transistor switch receiving a control voltage VG. A current source circuit controls the current on the light emitting device channel, the current source circuit requiring a minimum voltage VR for normal operation. The present invention further provides a dynamic headroom controller circuit which compares a voltage VS at a current outflow end of the transistor switch with the voltage VR to determine the relationship between the voltage VS and the voltage VR when the control voltage VG is higher than a reference voltage VH, and adjusts the voltage difference between the voltage VS and the voltage VR accordingly.07-14-2011
20110169424ILLUMINATION DEVICE WITH ELECTRICAL VARIABLE SCATTERING ELEMENT - A current limiting controller (07-14-2011
20110199022METHOD AND APPARATUS FOR CONTROLLING AN ILLUMINATION SYSTEM IN A TEMPERATURE CONTROLLED ENVIRONMENT - The present invention relates to a method for controlling the illumination system in a temperature controlled environment, and to a control system for a temperature controlled environment having an illumination system. More specifically, the invention relates to a method wherein output of the illumination system causes a temperature response in the temperature controlled environment, the temperature response being detected by a sensor, the method comprising regulating the temperature adaptively based on the output of the illumination system and the associated temperature response. The control system for the temperature controlled environment, having an illumination system, comprises a sensor proximate to a casing of the temperature controlled environment and is adapted to control the illumination system, wherein output of the illumination system causes a temperature response in the temperature controlled environment, the temperature response being detected by the sensor, and the control system is adapted to regulate the temperature adaptively based on the output of the illumination system and the associated temperature response.08-18-2011
20090278476DEVICE FOR GENERATING LIGHT - An illumination system (11-12-2009
20090284177METHOD AND APPARATUS FOR CONTROLLING A VARIABLE-COLOUR LIGHT SOURCE - Disclosed is a control device for controlling a variable-colour light source, the variable-colour light source comprising a plurality of individually controllable colour light sources. The control device comprises a control unit for generating, responsive to an input signal indicative of a colour and a brightness, respective activation signals for each of the individually controllable colour light sources. The control unit is configured to generate the activation signals from the input signal and from predetermined calibration data indicative of at least one set of colour values for each of the individually controllable light sources.11-19-2009
20110169422PLANAR LIGHT-EMITTING MODULE LIGHTING CIRCUIT AND ILLUMINATING DEVICE - A planar light-emitting module lighting circuit uses a lamp comprising an organic electroluminescence layer and electrodes sandwiching the organic electroluminescence layer as a load, and applies a current to the load so as to cause the organic electroluminescence layer to emit light. In the planer light-emitting module lighting circuit, a current at a lighting start time of the lamp is made small as compared with a current at a stationary lighting time at which a predetermined time period has passed since a lighting start.07-14-2011
20090261755INVERTER CIRCUIT, BACKLIGHT DEVICE AND LIQUID CRYSTAL DISPLAY HAVING THE SAME - An inverter circuit for a backlight device includes an inverter transformer which supplies a high AC voltage to a plurality of discharge tubes, a filter circuit connected to an output terminal of the inverter transformer, and an abnormal discharge detection circuit. The filter circuit passes a current signal having a high frequency component of the high AC voltage to the abnormal discharge detection circuit, and the abnormal discharge detection circuit detects an abnormal discharge current based on the current signal.10-22-2009
20090267537Motion activated removable blinking shoe light - A motion activated removable waterproof multi-colored blinking shoe light comprising a decorative top which attaches to a shoe by means of any appropriate fastening means such as a thin rubber or plastic snap, loop for receiving a shoe lace, any other loop, clasp, or pinching device, for example, is provided.10-29-2009
20100102756APPARATUS FOR DRIVING LIGHT EMITTING DEVICE - An apparatus for driving a light emitting device according to an aspect of the invention may include: a DC/DC converter unit generating driving power on the basis of an input voltage and supplying the generated driving power to an anode of a light emitting unit including a plurality of light emitting devices; a current source controlling to keep current flowing through the light emitting unit constant; a feedback circuit unit detecting voltage at a cathode of the light emitting unit; and a feedback coupling circuit unit coupling the output of the feedback circuit unit and the input of the DC/DC converter unit to supply the input voltage of the DC/DC converter unit according to the voltage detected by the feedback circuit unit and an output voltage of the DC/DC converter unit.04-29-2010
20090058322ADAPTIVE CONTROL APPARATUS AND METHOD FOR A SOLID STATE LIGHTING SYSTEM - The present invention provides a method and apparatus for adaptive control of a solid-state lighting system consisting of one or more groups of one or more light-emitting elements The invention comprises a voltage control device to provide each group with an independently controllable voltage A feedback system to detect and generate a signal representative of drive currents through the one or more groups A computing device then adaptively evaluates, based on the signal, a required voltage that achieves a desired respective drive current in each of the one or more groups.03-05-2009
20080303453Illumination Control Apparatus Using a Pulsating Waves - An illumination control apparatus using a pulsating wave is disclosed, in which a pulsating power is supplied to an electric power supplied to a fluorescent light stabilizer which needs an AC voltage. The level of the same is varied and supplied to an illumination control, such as fluorescent light and common light, is possible based on an input power control of a stabilizer without changing an installation of a conventional fluorescent light and common light device and of the power construction. In addition, the electric power can be concurrently supplied to a plurality of stabilizers based on a capacity of apparatus without changing the construction of a conventional system.12-11-2008
20080309255LIGHTING DEVICES AND METHODS FOR LIGHTING - A lighting device comprises groups of solid state light emitters, a sensor and circuitry. If the emitters are illuminated, the sensor is exposed to combined light from the groups, and senses only a portion of the combined light. The circuitry adjusts current applied to at least one of the emitters based on an intensity of the light sensed. Also, a device comprising emitters, a circuit board and a sensor, at least one of the emitters being positioned on the first circuit board and the sensor being spaced from the circuit board. Also, a lighting device comprising emitters, a sensor, and circuitry which adjusts current applied an emitters based on detection by the first sensor, the circuitry comprising a differential amplifier circuit. Also, a lighting device, comprising light emitters and circuitry which adjusts current applied to only some of the emitters based on ambient temperature. Also, methods of lighting.12-18-2008
20080265802System and Method for Controlling Lighting Systems - A light panel (10-30-2008
20080265801Solid state lighting apparatus - A lighting apparatus includes a solid state lamp including one or more solid state lighting elements, and a power circuit including a current limiting device electrically connected to the lamp. The current limiting device configured to impose a maximum threshold on the current delivered to the lamp, wherein the current limiting device functions as essentially a constant current source. The lighting apparatus includes a housing for the power circuit and lamp, as a module unit.10-30-2008
20090179589ARRANGEMENT PROVIDED WITH A VOLTAGE CONVERTER FOR SUPPLYING VOLTAGE TO AN ELECTRICAL CHARGE AND ASSOCIATED METHOD - The invention specifies an arrangement with a voltage converter (07-16-2009
20090179590BI-DIRECTIONAL LIGHT EMITTING DIODE DRIVE CIRCUIT IN PULSED POWER PARALLEL RESONANCE - The present invention is characterized by using capacitive, inductive or resistive impedance to constitute the first impedance which is series connected with the second impedance constituted by parallel connecting the capacitive and inductive impedances that appears parallel resonance with the pulsed period to receive pulsed power, thereby to form a divided bidirectional power at the two ends of the first and second impedances, so as toe drive the bidirectional conducting light emitting diode.07-16-2009
20130214700LED CONTROL SYSTEM - One embodiment includes a light-emitting diode (LED) control system. The system includes an LED driver system configured to regulate a control voltage based on a substantially constant reference current and a feedback voltage at a feedback node. The system also includes a digital current source system comprising a plurality of unit current sources that are each coupled to an LED. The plurality of unit current sources can be selectively activated to each provide a given unit current through the LED and to each provide the feedback voltage as an interpolative feedback to the feedback node based on the unit current. The system further includes a current magnitude controller configured to selectively activate the plurality of unit current sources in response to a current magnitude signal.08-22-2013
20090085500SYSTEMS AND METHODS FOR PROVIDING AN OEM LEVEL NETWORKED LIGHTING SYSTEM - The present application is generally directed to systems and methods for control and management of lighting components connected in a network. A user specified rule is executed to control lighting effects in a lighting network which comprises an interface module in communication with one or more lighting control modules. The interface module may receive a rule for controlling a lighting network. The rule may comprise a user identified input and a user specified lighting effect to occur responsive to the user identified input. The interface module detects receipt of the user identified input and executes the rule to trigger the user specified lighting effect via the one or more lighting control modules.04-02-2009
20120104974CONTROL UNIT FOR A LED ASSEMBLY AND LIGHTING SYSTEM - A control unit for a LED assembly includes a first and second LED unit, the LED units being serial connected. The LED assembly, in use, is powered by a switched mode power supply. The control unit being arranged to receive an input signal representing a desired output characteristic of the LED assembly, determine a first and second duty cycle for respective LED units associated with a nominal current of the switched mode power supply, for providing the desired output characteristic, determine the largest of the first and second duty cycles for respective LED units, determine a reduced current based on at least the largest of the duty cycles, adjust the first and second duty cycle for respective LED units based on the reduced current, and provide an output signal for the LED assembly and the switched mode power supply based on the adjusted first and second duty cycles and the reduced current for obtaining the desired characteristic.05-03-2012
20090184664METHOD OF DRIVING LIGHT SOURCES, DEVICE FOR DRIVING LIGHT SOURCES, AND DISPLAY DEVICE HAVING THE SAME - One or more embodiments of the present disclosure provide a method for driving light sources, a device for driving light sources and a display device having the device for driving the light sources. Power information is read based on position information on the light sources to output a light source control signal transmitting the power information. The power information determines a level of power applied to each of the light sources. Externally provided input power is changed into a plurality of driving powers having a level changed based on the light source control signal. The driving powers are applied to the light sources, respectively. According to one aspect of the present disclosure, uniformity of luminance distribution of a display panel may be improved.07-23-2009
20120104973LAMP CONTROL CIRCUIT - A lamp control circuit includes a first switch circuit receiving a voltage from a power supply after a control is turned on and outputs a first control signal, a count circuit receives the first control signal and outputs a second control signal, a gate circuit receives the second control signal and outputs a third control signal, a second switch circuit includes a number of electronic switches to receive the third control signal and controls the electronic switches to be turned on or turned off, and a lighting circuit including a number of light emitting diode (LED) groups. Each LED group includes an LED. When an electronic switch connected to an LED group is turned on, the LED of the corresponding LED group is lit. When an electronic switch connected to an LED group is turned off, the LED of the LED group does not light.05-03-2012
20090128054Extended Life LED Fixture with Central Controller and LED Lamps - An LED fixture includes multiple LED drivers and multiple LED lamps so that the lifetime of the fixture is a multiple of the lifetime of a conventional fixture that uses only a single LED driver. A central controller activates and deactivates the LED drivers so that the different LED lamps are driven sequentially. An optional multi-lamp LED driver concurrently drives multiple LED lamps that have been previously driven by the LED drivers.05-21-2009
20090184669LIGHT EMITTING DIODE LAMP - A light emitting diode (LED) lamp including a lamp body, a current control circuit, a color temperature management unit electrically connected to the current control circuit, and an LED array disposed inside the lamp body. The LED array is electrically connected to the current control circuit. The LED array is capable of providing light having different color temperatures. The current control circuit drives the LED array to change color temperature thereof automatically in accordance with an output of the color temperature management unit.07-23-2009
20090184666FREQUENCY CONVERTED DIMMING SIGNAL GENERATION - There is provided a lighting control circuit comprising a duty cycle detection circuit, an averaging circuit, a waveform generator and a comparator circuit. The duty cycle detection circuit generates a first periodic waveform having a duty cycle and frequency corresponding to an input waveform duty cycle and frequency. The averaging circuit generates a first signal having a voltage level corresponding to the duty cycle of the first periodic waveform. The waveform generator outputs a second periodic waveform having a frequency different from the input waveform frequency. The comparator circuit compares the second periodic waveform with the first signal to generate an output waveform having a duty cycle corresponding to the input waveform duty cycle and a frequency corresponding to the frequency of the second periodic waveform. Also, there are provided methods.07-23-2009
20090184665Drive Device for Leds and Related Method - A LED driver arrangement includes a switching-mode stage (07-23-2009
20090184667VOLTAGE SUPPLY MODULE AND BACKLIGHT ASSEMBLY HAVING THE SAME - In a voltage supply module and a backlight assembly having the same, a converter is disposed on a first face of a board and converts basic voltage into driving voltage. A capacitor includes at least one first electrode connected to an output line of the converter and at least one second electrode disposed to be spaced apart from the first electrode along a direction substantially parallel with the first face. A plurality of the second electrodes are disposed on the board between the first electrodes. The first and second electrodes form a ballast capacitance.07-23-2009
20090184668HIGH EFFICIENCY BOOST LED DRIVER WITH OUTPUT - A current driver for powering a string of LEDs has a boost converter coupled to an input voltage source. A voltage multiplier circuit is coupled to the boost converter and to the string of LEDs. A latch is provided having an output coupled to the boost converter. A current sense element is coupled to the boost converter. A current comparator is provided having an output coupled to a first input of the latch, a first input coupled to the current sense element, and a second input coupled to a reference current. A zero-volt detector circuit is provided having an output coupled to a second input of the latch and an input coupled to the boost converter and the voltage multiplier circuit.07-23-2009
20090212719DISPLAY APPARATUS THAT CAN BE MOVED IN SPACE - A medical examination or treatment facility comprising at least one display facility that can be moved in space is provided. The facility includes one or a plurality of lighting facilities arranged in a distributed manner to illuminate the space. It is possible to change the brightness and/or position of the individual lighting facilities automatically by a control or regulation facility as a function of a captured spatial position and/or orientation of the object, in particular of the display facility.08-27-2009
20090212718Illumination control system - An illumination control system includes lighting apparatuses connected to a communications line and a number of functional units of plural kinds functioning to detect information from ambient environments of the lighting apparatuses. Each lighting apparatus includes a lamp, an illumination circuit, a communication unit, a control unit, and a unit attaching part to which the functional unit is detachably attached. Each lighting apparatus belongs to one or more of plural groups corresponding to the functional units, the groups being operated based on information detected by the respective functional units. A functional unit having a detecting function corresponding to an operation of each group is attached to each unit attaching part of at least one lighting apparatus of each group, and each communication unit of the at least one lighting apparatus sends the control signal including information detected by the corresponding functional unit to another lighting apparatus in the same group.08-27-2009
20090295309FEEDBACK CONTROL OF LIGHTING-EMITTING BLOCKS IN A DISPLAY APPARATUS - To drive light-emitting blocks, currents are sensed through the light-emitting blocks arranged in an M×N matrix (wherein M and N are natural numbers), wherein M rows are connected to a row switching part and N columns are connected to a column switching part. The light-emitting blocks are driven by a local dimming method with feedback control responsive to the sensed currents.12-03-2009
20080315793METHOD AND FIRMWARE FOR CONTROLLING VOLTAGE AND CURRENT IN A FLUORESCENT LAMP ARRAY - A method and firmware for controlling voltage and current in an electrical load includes steps of calculating a numerically quantized duty cycle of a pulse-width modulated, digital switch control signal by firmware in an inverter voltage microcontroller as a function of an inverter voltage and controlling the inverter voltage by adjusting the duty cycle of the digital switch control signal to generate a load current in the electrical load.12-25-2008
20080315791HYBRID GAS DISCHARGE LAMP-LED LIGHTING SYSTEM - A lighting system and method combine at least one LED and at least one gas discharge lamp within a common housing. The lighting system includes a control system to dependently operate each LED and each gas discharge lamp during overlapping, non-identical periods of time. In at least one embodiment, the control system can provide light output by activating LEDs during gas discharge preheating operations and thus extend the useful life of each gas discharge lamp. When dimming the lighting system, the control system can reduce current to the gas discharge lamps and one or more gas discharge lamps can be phased out as dimming levels decrease. As dimming levels decrease, one or more of the LEDs can be activated or groups of LEDs can be phased in to replace the light output of the dimmed gas discharge lamps. Thus, the lighting system can reduce power consumption at low dimming levels.12-25-2008
20090230886DRIVER DEVICE THAT STABILIZES CURRENT AND AUTOMATICALLY REGULATES VOLTAGE OF A LIGHT EMITTING DIODE - A driver device that stabilizes current and automatically regulates voltage of a light emitting diode is capable of automatically regulating the voltage and stabilizing the current in accordance with a voltage demand, so as to provide the proper voltage and the stable current, for being applied to control color and shading of the light emitting diode. According to the actual voltage required by the light emitting diode, a current control unit controls a current-controlled transistor to output the stable current, so as to fit with the actual voltage requirement and stably control the changes of color and shading. Therefore, the requirements of energy saving, of that multiple light emitting diodes can be fitted with at a same time, and of that operating temperature can be decreased, are achieved.09-17-2009
20090230884DEVICE AND METHOD FOR CONTROLLING A LIGHTING SYSTEM BY PROXIMITY SENSING OF A SPOT-LIGHT CONTROL DEVICE AND SPOTLIGHT CONTROL DEVICE - The invention relates to controlling a lighting system by proximity sensing of a spotlight control device, particularly to controlling a spotlight generated by a lighting system such as a large LED lighting array by means of a spotlight control device. The invention provides a device (09-17-2009
20090230883Stacked LED Controllers - A driver for driving a plurality of light emitting diodes (LEDs) is formed of a plurality of LED controllers connected in series between a power supply and a reference voltage. Each controller drives one or more LEDs directly connected to it. Each controller has a voltage input terminal coupled to an output terminal of an adjacent upstream controller, and an output terminal coupled to the voltage input terminal of an adjacent downstream controller. Each controller has a normally-on bypass switch coupled between its voltage input terminal and the voltage input terminal of the adjacent upstream controller. The bypass switch completely bypasses the adjacent upstream controller when the adjacent downstream controller detects that its input voltage is below a threshold insufficient to drive the LED in the adjacent upstream controller. The bypass switch is turned off if the voltage is above the threshold.09-17-2009
20090200963Lighting Controller for a Vehicle Lamp - A lighting controller has current driving means which include a shunt resistor connected in series to each of multiple LEDs to detect an LED driving current, a PMOS transistor connected to the positive electrode side of each of the LEDs, and an amplifier for sending an output according to the result of comparison between the respectively detected driving current values and a reference value, and which subject each of the PMOS transistors to ON/OFF operation. Control means includes a Zener diode ZD08-13-2009
20090021187Apparatus for the Control of Lighting and Associated Methods - A lighting controller arranged to drive one or more light emitting semiconductors, the controller comprising a current source and/or a voltage source and a current and/or voltage sensor wherein the controller is arranged to drive the or each light emitting semiconductor using a substantially constant current or voltage and further arranged to either monitor the actual current passing through the light emitting semiconductor and the controller being arranged to monitor the voltage such that the disconnection or occurrence of faults within the or each light emitting semiconductor can be detected; or monitor the actual voltage across the light emitting semiconductor and the controller being arranged to monitor the current such that the disconnection or occurrence of faults within the or each light emitting semiconductor can be detected.01-22-2009
20090230885LED CONTROL DEVICE - An LED controller is provided that can easily control light-on testing of LEDs. A super voltage can be added to a signal including a low voltage and a high voltage. When the super voltage is not detected, LED driving circuit is operated in normal mode. When the super voltage is detected, LED driving circuit is operated in test mode. In test mode, the LEDs are turned on by a test signal directly input to LED driving circuit instead of by light emission data sent from shifter register to storage circuit. Accordingly, light-on testing of LEDs can be carried out easily.09-17-2009
20090212717Power Supply System and Method for the Operation of an Electrical Load - A current source arrangement is specified, in which at least one branch, comprising a current source (08-27-2009
20090273303Synchronous light emitting diode lamp string controller - The present invention discloses a synchronous LED lamp string controller, comprising a clock synchronous circuit to receive a reference signal with a constant frequency, and based on which, to generate a system clock; a counter circuit to counter the system clock and generate a clock signal; a control logic circuit to receive said clock signal to generate a control signal; and a driver circuit to receive said control signal to drive at least a light emitting diode.11-05-2009
20090251073 Fluorescent Task Lamp with Optimized Alignment and Ballast - A handheld fluorescent task lamp comprising a housing assembly having a housing and a tubular lens body enclosing compact fluorescent bulbs, an elongated spine configured for slidingly supporting the lens body, and a resilient bulkhead for cushioning the compact fluorescent bulbs in the lens body; an electronic ballast circuit within the housing comprising a power supply, a self-starting electronic driver circuit operable to start and run at least first and second CFL bulbs; a bulb accommodation circuit that enables operation of the electronic ballast circuit with either starter type or non-starter type and regardless whether one or both CFL bulbs are connected to the driver circuit; and an illumination assembly, wherein the CFL bulbs are oriented with respect to each other such that an enhanced forward emission field is provided.10-08-2009
20090251071Driving Multiple Parallel LEDs with Reduced Power Supply Ripple - An LED driver is disclosed that drives LEDs connected in parallel. Instead of applying current to all the parallel-connected LEDs at the same time, under control of a common PWM brightness control signal, the application of current to each parallel path is staggered by using staggered brightness control signals. The turning on of the LEDs in the different parallel paths will have the same duty cycle but will be out of phase. This reduces ripple in the power supply by reducing the magnitude of the instantaneous current sink. In one embodiment, a shift register contains a binary representation of the PWM duty cycle, and a clock shifts the bits along the shift register. The PWM brightness control signals for each parallel path of LEDs are tapped from different positions along the shift register so that the PWM brightness control signals are identical but staggered.10-08-2009
20090251074ANALOG-TO-ANALOG LIGHTING APPARATUS AND METHODS - The invention provides a system of generation of multi-channel analog output signals, from a single analog input signal, and the controlled activation of peripheral devices responsive to the multi-channel analog output signals. A single-channel to multi-channel analog-to-analog converter is provided to convert the single analog input signal to multiple output channels. Uni-directional coupling is used for coupling and mixing the multi-channel outputs and transferring the mixed outputs to a data bus. Signals on the data bus are used to drive the multiple peripheral devices.10-08-2009
20090251070Electronic Zoom Portable Electric Lamp - The portable electric lamp, for example a headlamp, is a lamp with light-emitting diodes comprising at least two distinct light sources (10-08-2009
20110140635LIGHTING APPARATUS - Disclosed herein is a lighting apparatus which varies a light emission pattern of a light emitting unit based on external stimuli, such as sounds, and is aesthetically pleasing to a user through variation in light emission pattern.06-16-2011
20110140634CIRCUIT ARRANGEMENT AND METHOD FOR THE OPERATION OF AT LEAST ONE DISCHARGE LAMP - A circuit arrangement for the operation of at least one discharge lamp is provided. The circuit arrangement may include an input for connecting an AC supply voltage; a rectifier, which is coupled to the input and has a first output terminal and a second output terminal for providing a DC supply voltage; an inverter, which includes at least a first switch and a second switch, which are coupled in series between the first output terminal and the second output terminal of the rectifier; a control circuit which is at least designed to drive the first switch and the second switch, with a first input for receiving a control signal, and a second input for feeding a voltage for supplying the control circuit, the second input being connected to an operational supply apparatus, which is designed to couple an operational supply voltage to the second input of the control circuit during operation of the inverter; a control line, which is coupled firstly to the input for connecting an AC supply voltage and secondly to the first input for receiving a control signal, a third switch being arranged in the control line; wherein it furthermore includes a startup supply apparatus with an input and an output, its input being coupled to the first input of the control circuit, and its output being coupled to the second input of the control circuit, the startup supply apparatus being designed to provide a startup supply voltage at the output of the startup supply apparatus in the event of an on signal at the input of the startup supply apparatus when the control circuit has no supply and therefore is switched off.06-16-2011
20100148698AUDIO CONTROLLED LED DECORATION LAMP STRING SYSTEM - The present invention is an audio controlled LED decoration lamp string system that mainly is to design a system with flashing function by inputting the audio source's frequency to directly control the LED decoration lamp string and create the variation of light and shade. The said system can be electrically-conducted in from a first sector capable of providing the AC (alternate current) or DC (direct current) power to a second sector's IC and electrically-conducted in a fifth sector's LED lamp string simultaneously. And, the second sector's IC is separately electrically-conducted with a third sector's MIC (audio source receiver) and a fourth sector's PWM (pulse width modulation). The fourth sector's PWM is then electrically conducted with a fifth sector's LED lamp string to form a complete system.06-17-2010
20100156321Lamp Driving Device - A lamp driving device includes a DC power supply, a square wave switch, a square wave controller, a plurality of lamps, a starting transformer, and a common transformer; a plurality of starting transformers and a plurality of common transformers are disposed at both sides of the plurality of lamps respectively, the plurality of starting transformers and the plurality of common transformers can have their primary sides or secondary sides cascaded and connected to the square wave switch; the present invention can effectively control the output power to the lamps, reduce the size and the temperature of the device, and improve the overall efficiency by connecting the primary sides or secondary sides in series.06-24-2010
20100156319LED Lighting System with Accurate Current Control - A light emitting diode (LED) lighting system and method are disclosed. The LED lighting system and method include an LED controller to accurately control a current in an LED system. The LED controller includes components to calculate, based on the current and an active time period of an LED current time period, an actual charge amount delivered to the LED system wherein the LED current time period is duty cycle, modulated at a rate of greater than fifty (50) Hz and to utilize the actual charge amount to modify and provide a desired target charge amount to be delivered during a future active time period of the LED current time period. The LED system and method further involve components to compare the actual charge amount to a desired charge amount for the active time period and compensate for a difference between the actual charge amount and the desired charge amount during the future active time period.06-24-2010
20120139446METHOD AND SYSTEM FOR LIGHTING CONTROL - A system and method for controlling an entertainment system is provided. The system can have at least one light source to generate variable light output and at least one controller coupled to the at least one light source to control the variable light output based on a number of interruptions of power supplied to the apparatus over a pre-determined time period. The variable light output can be a light temperature. The at least one light source can be a plurality of light sources, with the at least one controller having a plurality of addresses and each of the addresses designating one or more of the plurality of light sources to be controlled. The at least one controller can synchronize or unsynchronize the plurality of light sources.06-07-2012
20100259191POWER CONTROL CIRCUIT AND METHOD - A light source with substantially constant intensity and power consumption is provided. The light source includes a controllable dc voltage and current source; a non-linear light-emitting load supplied with dc voltage and current from the controllable dc voltage and current source; a current sense circuit connected in series with the non-linear light-emitting load; a variable LED forward voltage (varying with temperature, binning batch, aging) sensor circuit; a multiplier operative to measure a power-representative signal; and a power consumption control feedback circuit through which the dc voltage and current source is controlled in relation to the variable forward voltage representative signal to adjust the dc voltage and then a current to amplitudes that keep the light intensity and power consumption produced by the light source substantially constant.10-14-2010
20100225247LED Circuit - A LED circuit is provided. The LED circuit comprises: an inductor, a group of LEDs, a power MOS and a switching circuit. The switching circuit comprises: an error amplifier generating an error output, a PWM, a RC circuit and a control means. The PWM generates a switching signal according to the error output to control the power MOS to charge or discharge the group of LEDs; the RC circuit comprises at least one first capacitor each comprising a switch, at least one second capacitors; and a resistive means connected in series between the first and the second capacitors and the error output. The control means generates a control signal according to the dimming signal to turn on the switches to activate the first capacitors during the active period of the dimming signal and turn off the switches to deactivate the first capacitors during the inactive period of the dimming signal.09-09-2010
20100259193Remote Lighting Control System - A remote lighting control system is for remote lighting control of a plurality of discharge lamps. This system has the installed electronic ballasts of each discharge lamp. Each electronic ballast has a transceiver and a controller, the transceiver exchanges control information with the controller. The control command contains the identifiable information to specify one of a plurality of electronic ballasts. When the transmitter is received the control command, the transceiver transfers the received control command to other electronic ballasts further. Moreover, if the control command is the one that the identifiable information specifies own ballasts, the control information based on the received control command is send to own controller, and the controller control the discharge lamp. According to this system, when a lot of lamps was arranged the factory etc. comparatively widely, the user's remote control is not limited to the narrow scope.10-14-2010
20130214699Dual-Mode Dimming of a Light - Various methods and apparatus for controlling brightness of a light emitting apparatus include controlling a brightness of a light emitting device based on a brightness value, receiving a message over a network, and detecting a modulation of a power input of the light emitting apparatus. The brightness value is changed based on both the message and the modulation.08-22-2013
20100013413Light Emitting Device - A light emitting device capable of decreasing manufacturing cost includes a power generator for generating a first DC power, a first DC controller for generating a control signal, a DC-DC transformer coupled to the power generator and the DC control unit, for transforming the first DC power into a second DC power according to the control signal, a plurality of LED loads each including a plurality of LED sequences coupled to the DC-DC transformer, for emitting light according to the second DC power, and a plurality of LED drivers coupled to the plurality of LED loads, for adjusting output currents of the LED sequences to achieve constant output currents.01-21-2010
20100176746Method and Device for Remote Sensing and Control of LED Lights - A control system is disclosed for determining an actual temperature of a light emitting diode. The control system uses conductor that supply power to the light emitting diode to supply a pulse to the light emitting diode. The pulse is determined along with a reaction caused by the pulse and the information gained is used in determination of the light emitting diode die temperature which can then be used in controlling current to the light emitting diode to control the temperature of the light emitting diode.07-15-2010
20100194308LED DRIVER WITH DYNAMIC HEADROOM CONTROL - A voltage source provides an output voltage to drive a plurality of light emitting diode (LED) strings. A LED driver adjusts the level of the output voltage so as to maintain the lowest tail voltage of the LED strings at or near a predetermined threshold voltage so as provide sufficient headroom voltages for current regulators for the LED strings. The LED driver operates in an operational mode and a calibration mode, which can be implemented in parallel with, or part of, the operational mode. During the calibration mode, the LED driver determines, for each LED string, a code value representative of the level of the output voltage necessary to maintain the tail voltage of the corresponding LED string at or near the predetermined threshold voltage. In the operational mode, the code values from the calibration mode are used to control the voltage source to provide an appropriate level for the output voltage.08-05-2010
20100225249LED Driver with Direct AC-DC Conversion and Control, and Method and Integrated Circuit Therefor - The present invention discloses an LED driver with direct AC-DC conversion and control function, and a method and integrated circuit therefor. The LED driver comprises: a primary side circuit receiving rectified AC power, the primary side circuit including at least one power switch; a transformer coupled to the primary side circuit and controlled by the at least one power switch to convert a primary voltage to a secondary voltage which is supplied to an LED circuit; and a secondary side circuit coupled to the transformer, the secondary side circuit directly controlling current flowing through the LED circuit and sending a feedback signal to the primary side circuit to control the at least one power switch thereby.09-09-2010
20100207546METHOD FOR DRIVING COLOR LAMP AND APPARATUS THEREFOR - Disclosed is a color lamp driving apparatus for generating illumination light of various colors by using a plurality of Red (R), Green (R), and Blue (B) lamps together with each other, having a color controller for generating a color control signal, which indicates driving time rates of R, G, and B lamp arrays, according to color information of required illumination light, and a lamp driving module for outputting a driving signal for driving each of R, G, and B lamp arrays according to the color control signal output from the color controller. The driving signal is set to apply driving times for the R, G, and B lamp arrays based on one among a start time point, a middle time point, and an end time point of each corresponding period ΔT within one light-emitting period T.08-19-2010
20100277099METHOD OF DRIVING A LIGHT SOURCE, LIGHT SOURCE DRIVING APPARATUS FOR PERFORMING THE METHOD AND DISPLAY APPARATUS HAVING THE LIGHT SOURCE DRIVING APPARATUS - A light source power supply part generates a first output voltage close to a light source input voltage or a second output voltage close to a reference voltage by comparing the reference voltage and the light source input voltage in accordance with an embodiment of the present invention. A light source driving part may drive a light source based on the first output voltage or the second output voltage. Therefore, the light source may be driven with a stable voltage regardless of the level of the light source input voltage.11-04-2010
20100213873SYSTEM AND METHOD FOR LIGHT AND COLOR SURROUND - The present disclosure is directed towards a multimedia system comprising a multimedia reader. The multimedia reader may be configured to read multimedia content and to extract light surround content. The light surround content may represent a light surround control signal. The light surround content may be extracted from the multimedia content. The multimedia reader may also be configured to output the light surround control signal. Further, the multimedia system may also include one or more light emitting devices. Each light emitting device may be in communication with the multimedia reader. Each light emitting device may be configured to receive the light surround control signal and to control a light characteristic based upon, at least in part the light surround control signal. Numerous other embodiments are also within the scope of the present disclosure.08-26-2010
20100237803Dimmable color selectable light emitting diodes - A dimmable color selectable light emitting diode (LED) lighting system, comprising: a plurality of light sources including at least one LED and being configured to communicate with one another over a network including at least one power line; and a controller configured to communicate with the plurality of light sources over the network to control the intensity and color of light displayed by each of the plurality of light sources.09-23-2010
20100079089LAMP SET - A lamp set includes a control device and a first lighting device. The control device includes an energy-generating unit for providing an energy distribution. The first lighting device includes a pre-processing unit, a first lighting element, and a controller. The controller is coupled to the pre-processing unit and the first lighting element. The pre-processing unit is used to sense the energy distribution or to receive information included in the energy distribution thus to allow the controller to control luminance of the first lighting element according to the energy distribution.04-01-2010
20090273302ARTIFICIAL WINDOW - Disclosed is an artificial window (11-05-2009
20090322253LED Lighting System having a Reduced-Power Usage Mode - An LED lighting system, with first and second types of LEDs of different efficacies, has a reduced-power usage mode. A control system independently controls first and second control groups of first and second types of LEDs, respectively. The control system has one or more modes including a reduced-power usage mode for decreasing the overall power consumption of the lighting system while maintaining a light level of at least a predetermined percentage of the level present when the first control group of LEDs operates at a power level between less-than-full power and full power and the second control group is off. The predetermined percentage is 50. The control system decreases the overall power consumption of the lighting system in the reduced-power usage mode by turning off or dimming the first control group and turning on the second control group to at least some extent.12-31-2009
20090115348Light emitting device - The luminance of different colors of light emitted from EL elements in a pixel portion of a light emitting device is equalized and the luminance of light emitted from the EL elements is raised. The pixel portion of the light emitting device has EL elements whose EL layers contain triplet compounds and EL elements whose EL layers contain singlet compounds in combination. The luminance of light emitted from the plural EL elements is thus equalized. Furthermore, a hole transporting layer has a laminate structure to thereby cause the EL elements to emit light of higher luminance.05-07-2009
20110031898DRIVING APPARATUS AND METHOD FOR ADJUSTING DRIVE VOLTAGE - A driving apparatus includes a voltage transforming unit and a detector. The driving apparatus is used for supplying a drive voltage to a load. The voltage transforming unit is used for transforming a direct current (DC) voltage to the drive voltage. The detector is connected to the load for detecting a forward voltage across the load to generate a detecting voltage; wherein the detector compares the detecting voltage with a first reference voltage. If the detecting voltage is smaller than the first reference voltage, the detector generates a first feedback signal; the voltage transforming unit increases the drive voltage according to the first feedback signal, the detecting voltage is defined by subtraction of the forward voltage from the drive voltage.02-10-2011
20110031897LIGHTING SYSTEMS AND METHODS OF AUTO-COMMISSIONING - A lighting system for areal illumination is disclosed which includes a remote driver and a plurality of fixtures including luminaires, control devices, and/or standalone sensors. The luminaires include a light source whose output light level can be adjusted, a light sensor co-located therewith adapted to measure light received from adjacent fixtures, and a microcontroller capable of transmitting the output of the light sensor over wires to the remote driver. The remote driver is capable of bidirectional communication with the luminaires and provides independently controllable power for the light sources of the luminaires. A method of commissioning a lighting system is also disclosed which includes installing a plurality of luminaires above the area to be illuminated, causing a light source co-located with each luminaire to emit a signal, detecting the signal at light sensors co-located with each luminaire, converting the signals obtained by the light sensors into distance measurements between luminaires, creating a map recording the relative location of luminaires, and assigning luminaires to groups based on their relative locations in the map. A movable orb region large enough to containing a plurality of luminaires can also be defined and the light levels of individual luminaires can be set according to a defined mathematical function of their location within the orb region, where the defined mathematical function sets light levels which vary from the center to the periphery of said orb region.02-10-2011
20100219772PORTABLE ELECTRONIC DEVICE - A portable electronic device includes a housing, at least one thermoscope unit mounted on the housing, a processor unit connected to the thermscope unit, and at least one light emitting unit connected to the processor unit. The processor unit stores data of predetermined different light colors corresponding to different ambient temperature ranges. The thermoscope unit detects ambient temperature, the processor unit obtains the ambient temperature from the thermoscope unit and controls the light emitting unit to emit light in predetermined colors corresponding to the ambient temperature range according to the stored data.09-02-2010
20090108774BACKLIGHT UNIT AND LIQUID CRYSTAL DISPLAY APPARATUS HAVING THE SAME - In a backlight unit and an LCD apparatus having the backlight unit, in which the backlight unit includes a plurality of lamps and an inverter, the inverter provides the lamps with current. The inverter reduces current provided to the lamps to turn off the lamps. Therefore, currents are gradually decreased to reduce noise generated by the transformer when the lamps are turned off.04-30-2009
20120032611LED EMITTING DEVICE AND DRIVING METHOD THEREOF - The present invention relates to an LED emitting device and a driving method thereof including at least two LED channels.02-09-2012
20100295476FAST SWITCHING, OVERSHOOT-FREE, CURRENT SOURCE AND METHOD - A method and a circuit may have an ability to provide constant currents of a certain set value, the rising and falling edges of which may be shorter than the design minimum on-phase. Essentially, these results may be obtained by keeping an operational amplifier that controls the output power switch in an active state during off-phases of an impulsive drive signal received by the current source circuit in order to maintain the output voltage of the operational amplifier at or just below the voltage to be applied to the control terminal of the output power switch during a successive on-phase of a received drive pulse signal.11-25-2010
20100301772Simplfied lighting control system - The invention offers an improvement in lighting control systems by providing a simplified power switching control system (i.e., using direct AC line voltage or DC current power switches instead of low voltage switches that control higher-current-capable relays) that controls the power to the power supplies that drive the light producing devices in a plurality of luminaires or lighting fixtures in a given installation. The lighting control system facilitates multiple modes of lighting configurations while requiring fewer switches that the prior art and also being easier to operate. The system supports the simultaneous use of multiple lighting technologies. Other embodiments showing extensions to the invention are also disclosed.12-02-2010
20100301773Fixture with Individual Light Module Dimming - In embodiments of the present invention, a method and system is provided for designing improved intelligent, LED-based lighting systems. The LED based lighting systems may include fixtures with one or more of rotatable LED light bars, integrated sensors, onboard intelligence to receive signals from the LED light bars and control the LED light bars, and a mesh network connectivity to other fixtures.12-02-2010
20100301774Power Management Unit with Automatic Output Configuration - In embodiments of the present invention, a method and system is provided for designing improved intelligent, LED-based lighting systems. The LED based lighting systems may include fixtures with one or more of rotatable LED light bars, integrated sensors, onboard intelligence to receive signals from the LED light bars and control the LED light bars, and a mesh network connectivity to other fixtures.12-02-2010
20110001438Power Management Unit with Temperature Protection - In embodiments of the present invention, a method and system is provided for designing improved intelligent, LED-based lighting systems. The LED based lighting systems may include fixtures with one or more of rotatable LED light bars, integrated sensors, onboard intelligence to receive signals from the LED light bars and control the LED light bars, and a mesh network connectivity to other fixtures.01-06-2011
20110109248DC/DC CONVERTER WITH MULTIPLE OUTPUTS - Embodiments of the invention provided a DC/DC converter. The DC/DC converter includes a transformer, a first controller and a first switch. The transformer has a primary winding coupled to a power source, a first secondary winding for providing a first output voltage and a second secondary winding for providing a second output voltage. The first controller is coupled to the primary winding for controlling input power to the primary winding to regulate the first output voltage. The switch is coupled to the second secondary winding and for regulating the second output voltage. The first switch is controlled by a pulse modulation signal. A current flows through the second secondary winding if the pulse modulation signal is in the first state, and the current flowing through the second secondary winding remains cut-off if the pulse modulation signal is in the second state.05-12-2011
20120032613CIRCUITS AND METHODS FOR DRIVING LIGHT SOURCES - A driving circuit for powering a light-emitting diode (LED) light source includes a converter circuit, an energy storage element and a switch element. The converter circuit provides a first output voltage on a first power line to provide power to the LED light source and provides a second output voltage on a second power line that is less than the first output voltage. The energy storage element is charged and discharged to regulate a current through the LED light source. The switch element operates in a first state during which the energy storage element is charged and operates in a second state during which the energy storage element is discharged. The converter circuit provides the second output voltage to maintain an operating voltage across the switch element less than the first output voltage during both the first state and the second state.02-09-2012
20090230882Architecture and technique for inter-chip communication - The present invention involves an electrical system in which an analog signal channel passes through various integrated circuit chips (ICs). The channel can carry one or more analog signals. Each IC can modify the signal(s) passing through it and pass it on to another IC or system component. The channel can be programmable. Each IC can include a comparator or a multiplexor to receive the channel signal from another IC or system component and to modify the received signal before transmitting it to another IC or system component. The comparator or the multiplexor can be programmable and can be selectively configured to compare the incoming signal from the channel with a variety of other signals and thresholds, or to simply act as a flow through gate and allow the signal to pass without any modification. The comparison can determine the output of the comparator. The operation and programming of the comparators, the multiplexors and the channel can be centrally controlled by a system controller, can be independently controlled by the ICs, or a combination thereof.09-17-2009
20110043137WHITE LIGHT COLOR CHANGING SOLID STATE LIGHTING AND METHODS - Solid state lighting (SSL) luminaries are disclosed wherein the emission intensity of discrete light sources within the SSL luminaire can be varied to produce luminaire light having different characteristics. The present invention can utilize the unique circuit topology of SSL luminaires to vary the emission intensity of different types of LEDs in the luminaire. In some embodiments, the different types of LEDs are connected in respective serial strings, and the intensity of emission of the LEDs in each of the strings can be varied by changing the electrical signal driving the strings. In some of these embodiments, white light is emitted from the SSL luminaire by combining emission from BSY and red LEDs. For these embodiments the color changing solutions according to the present invention can include, as an example, changing color while dimming the luminaire, changing color between daytime and nighttime modes, and changing between most efficient and points in between.02-24-2011
20110115410LED LAMP FOR STREET LIGHTING UTILIZING MULTIPLE DRIVERS - Disclosed is a light emitting diode lamp including a plurality of LED modules having a plurality of LEDs, the plurality of LEDs being arranged in a plurality of zones, a plurality of drive modules each respectively providing pulsed direct current power to one of the plurality of zones, and LED lamp controller electrically connected to the plurality of drive modules.05-19-2011
20110115409LED EMITTER FOR OPTICAL TRAFFIC CONTROL SYSTEMS - A light emitter for a traffic control preemption system. The emitter includes a plurality of groups of infrared (IR) LEDs and a power source coupled to the groups of LEDs. A plurality of controlled current sources is coupled to the plurality of groups of LEDs, respectively. A controller is configured to trigger an IR light pulse pattern from the groups of LEDs and maintain a first level of IR radiant power from the groups of LEDs using individual control of respective current levels to the groups of LEDs in response to current sense levels from the groups of LEDs. The pulse pattern and first level of IR radiant power activate preemption in the traffic control preemption system.05-19-2011
20110127928Automatic Calibration of an Automated Dimmer - The present specification discloses a method and device for automatically calibrating a reference light level for an automated dimmer for electric lights, such as fluorescent lamps. An automatic dimmer, including an automatic calibration device, can be installed in series between an instant-start electronic ballast and a fluorescent lamp. An exemplary method for calibrating a lamp includes blocking or removing all ambient light, turning on the electric light, measuring the light output, and turning off the electric light.06-02-2011
20100164405ILLUMINATED OPTICAL APPARATUS - A device may include a magnifying lens having a focal length that defines a focal plane, a light source providing visible light directed toward the focal plane, and a controller. The controller may be programmed to receive a signal indicative of the distance from the device to an object, cause the light source to emit visible light at a first brightness if the distance is at least substantially equal to the focal length of the lens, and cause the light source to emit visible light at a second brightness, dimmer than the first brightness, if the distance is not at least substantially equal to the focal length of the lens.07-01-2010
20100164403Circuits and methods for controlling LCD backlights - A circuit for controlling light sources comprises a converter, a feedback circuit and a current distribution controller. The converter is operable for converting an input voltage to an output current and for providing the output current to the light sources. The feedback circuit is coupled to the light sources for generating feedback signals indicative of currents flowing through the light sources respectively. The current distribution controller is coupled to the feedback circuit for generating control signals based on the feedback signals respectively so as to regulate the currents of the light sources respectively, and for controlling the converter to regulate the output current based on the feedback signals.07-01-2010
20110241568METHODS AND SYSTEMS FOR MAINTAINING THE ILLUMINATION INTENSITY OF LIGHT EMITTING DIODES - Systems and methods for maintaining the illumination intensity of one or more LEDs above a minimal intensity level. The systems and methods may include: (10-06-2011
20110210682LED DRIVING CIRCUIT AND POWER CONVERTING CIRCUIT - A power converting circuit having the function of circuit detecting is provided. The power converting circuit has a transistor, a controller and a detecting circuit. The transistor receives an input voltage. The controller is coupled to a control end of the transistor to control the conducting state of the transistor so as to stabilize the output of the power converting circuit. The detecting circuit detects at least one of the control end and the low voltage end of the transistor, and generates a state signal when the detected voltage of any one of the control end and the low voltage end does not fall within a corresponding predetermined voltage range. The state signal is utilized for stopping a power circuit which provides the input voltage providing the input voltage. In addition, a light emitting diode driving circuit having the function of circuit detecting is also provided.09-01-2011
20090218960STEP-WISE INTENSITY CONTROL OF A SOLID STATE LIGHTING SYSTEM - A solid state lighting system controls overall light output level in a step-wise manner by discretely controlling the ON/OFF state of its light emitters. Solid state emitters that are ON at a given time are set and kept at a level intended to produce a desired output characteristic, e.g. at a level to produce a described color of light. The system utilizes optical processing of the generated light, for example by diffuse reflection in an optical integrating cavity, sufficient to convert the point source output(s) from the emitting elements into a uniform virtual source output. The virtual source output appears uniform regardless of how many emitters are ON or OFF, and only the perceptible intensity of the light output changes with the number of emitters that the system has ON.09-03-2009
20110241567HYBRID FLOURESCENT LIGHT CONTROLLER - A system may be provided for controlling an amount of light generated by multiple fluorescent lamps based on a desired light level. A dimming circuit may vary the amount of light generated by at least one of the fluorescent lamps based on the desired light level if the desired light level is in a first range of light level values. The fluorescent lamps remain lit as the amount of light generated by the lamps is varied. A switch circuit may switch off a first subset of the fluorescent lamps while a second subset of the fluorescent lamps remains lit if the desired light level is in a second range of light level values. The second range of light level values indicates less light is desired than the first range of light level values indicates.10-06-2011
20090315481METHOD AND DEVICE FOR LED CHANNEL MANAGMENT IN LED DRIVER - Disclosed are example open channel detection techniques at a light emitting diode (LED) driver of an LED system. The LED driver does not enable its LED channels before normal operation so as to inhibit current flow through the LED channels during start-up. While the LED channels are disabled, the LED driver compares the voltages at the LED channel inputs with a predetermined voltage to determine whether an operational LED string of an associated LED panel is connected to the LED channel. In the event that an LED channel is determined to be an “open” channel, the LED driver further disables the LED channel for the following normal operational mode. Otherwise, if the LED channel is determined to be connected to an operational LED string, the LED driver enables the LED channel for the normal operational mode, during which the LED channel can be selectively activated for light output subject to display data for the LED panel.12-24-2009
20110175550APPARATUS FOR DRIVING LOAD - An apparatus for driving loads is disclosed. The apparatus mentioned above for driving a plurality of loads includes a protection module and a current generating module. The protection module has a plurality of detection terminals and generates a plurality of detection results according to a plurality of driving voltages on the detection terminals. The current generating module provides a plurality driving currents according to the detection results for flowing through each of the loads, separately.07-21-2011
20100013414Lamp and Bulb For Illumination and Ambiance Lighting - An Edison-style light bulb (01-21-2010
20090033246LIGHT EMITTING DIODE LAMP - A light emitting diode (LED) lamp includes a lamp body, a current control circuit, and an LED array disposed inside the lamp body. The LED array is electrically connected to the current control circuit. The LED array includes a carrier, a plurality of first LEDs disposed on the carrier for emitting a first light, and a plurality of second LEDs disposed on the carrier for emitting a second light. The first light and the second light have a same color but different color temperatures. The above-mentioned LED lamp provides lights with different color temperatures.02-05-2009
20100072922ELECTRONIC CIRCUIT FOR DRIVING A DIODE LOAD - An electronic circuit includes circuit portions for identifying a largest voltage drop through one of a plurality of series connected diode strings and for controlling a boost switching regulator according to the largest voltage drop. The electronic circuit can sense an open circuit series connected diode string, which would otherwise have the largest voltage drop, and can disconnect that open circuit series connected diode string from control of the boost switching regulator. Another electronic circuit includes a current limiting circuit coupled to or within a boost switching regulator and configured to operate with a diode load. Another electronic circuit includes a pulse width modulation circuit configured to dim a series connected string of light emitting diodes.03-25-2010
20120242251AMBIENCE LIGHTING SYSTEM USING GLOBAL CONTENT CHARACTERISTICS - The invention relates to an ambience lighting system, typically for use in conjunction with a display device. The ambience lighting system may be of the type AmbiLight. The ambience lighting system comprises one or more light sources associated to subregions of the display screen; a content characterizer for determining content characteristics of image data of the sub-regions; and a controller to control the color of the emitted ambience light in accordance with determined content characteristics. The content characterizer is further adapted to determine content characteristics of a global region of the display screen, and the controller is adapted to control the color of the emitted ambience light in accordance with the determined content characteristics of the subregions and of the global region.09-27-2012
20120242248LIGHTING CONTROL DEVICE AND LIGHTING CONTROL MODULE - The invention discloses a lighting control module, suitable for controlling a lighting device. The plate of the lighting control module is detachably assembled with the lighting control device. In the lighting control device, a microprocessor commands a power phase control circuit to control the lighting device according to a touch signal sensed by a touch sensing module and controls an indicating light module according the brightness of the lighting device.09-27-2012
20100052572LIGHT EMITTING ELEMENT DRIVING APPARATUS - The N light emitting element groups each include one or more light emitting elements. The power source circuit includes a control input terminal and supplies the power source voltage to the N light emitting element groups. The N current driving circuits, each including a feedback output terminal, generate N drive currents for driving the respective N light emitting element groups and generate main feedback voltages at the feedback output terminals based on the power source voltage. The main feedback circuit applies a main feedback signal to the control input terminal based on the N main feedback voltages. The auxiliary feedback circuit applies an auxiliary feedback signal to the control input terminal based on the power source voltage. The power source circuit adjusts the power source voltage based on at least one of the main feedback signal and the auxiliary feedback signal.03-04-2010
20090322252LED DRIVING CIRCUIT AND A MOSFET SWITCH MODULE THEREOF - An LED driving circuit and a MOSFET switch module thereof is disclosed, and the MOSFET switch module which is used to control a current of the LED driving circuit. The present invention employs a voltage clamping device to clamp the voltage level of the drain of transistor in the MOSFET switch module when being turned off. Via this way, the requirement for the withstand voltage of the transistor is lowered, and so the cost and power consumption thereof is reduced.12-31-2009
20100127640BRIGHTNESS-ADJUSTABLE ILLUMINATION DRIVING SYSTEM - An illumination driving system includes a control unit and at least one base. The control unit includes a first converter and a brightness-adjustable circuit. An input AC voltage is converted into a regulated DC voltage by the first converter. The brightness-adjustable circuit is connected to the first converter. The base is separated from the control unit for supporting the at least one light-emitting device. The base includes a second converter. The second converter is connected with the first converter and the light-emitting device for converting the regulated DC voltage into an output voltage. The light-emitting device is driven to illuminate by the output voltage. The brightness-adjustable circuit generates a brightness adjusting signal to the first converter. The magnitude of the regulated DC voltage is adjusted according to the brightness adjusting signal, thereby adjusting the brightness value of at least one light-emitting device.05-27-2010
20090026979Lighting load management system for lighting systems having multiple power circuits - A lighting control system is provided for a space that is equipped with multiple lamps for illuminating the space and multiple power circuits for supplying power to different groups of the lamps. The control system stores information relating to the past illumination of the lamps in each of the different groups. The system detects conditions or events that indicate that increased illumination of the space by the lamps is needed, and produces a control signal in response to the detection of a condition or event that indicates that increased illumination of the space by the lamps is needed. In response to the control signal, the system supplies power to at least one of the power circuits, which is selected on the basis of the stored information, to turn ON the group of lamps receiving electrical power from that power circuit.01-29-2009
20100072920DRIVE SYSTEM FOR ILLUMINATION DEVICE - A drive system for an illumination device includes a plurality of LEDs; an extra load; an illumination setting unit, for providing an illumination parameter such as a work cycle; a power supply unit, for providing a DC current; a microprocessor, for receiving the illumination parameter and generating a plurality of drive signals and a compensation signal according to the received illumination parameter; a plurality of first drive units, for driving the LEDs to receive the DC current in the high-level cycle for illumination; and a second drive unit, for receiving the compensation signal and outputting the DC current to the extra load according to the compensation signal.03-25-2010
20090284178Circuit Arrangement and Method for Voltage Conversion - A circuit arrangement (11-19-2009
20090108775LED DRIVER WITH ADAPTIVE ALGORITHM FOR STORAGE CAPACITOR PRE-CHARGE - A method is provided for driving a plurality of light emitters in a plurality of output paths with each output path including at least one light emitter. The method includes the steps of applying a supply voltage level to a plurality of output paths; generating a current for each path during a period of a predetermined length for the output path; sensing a current level for each output path during the period; comparing each sensed current level with a reference level; increasing the supply voltage level if the sensed current level is lower than the reference level; determining a lowest supply voltage level for the worst case output path; and using the lower supply voltage level as a common supply voltage level for all output paths.04-30-2009
20090096387DRIVER SYSTEM AND METHOD FOR MULTIPLE COLD-CATHODE FLUORESCENT LAMPS AND/OR EXTERNAL-ELECTRODE FLUORESCENT LAMPS - Driver system and method for multiple cold-cathode fluorescent lamps and/or external-electrode fluorescent lamps. According to an embodiment, the present invention provides a system for driving a plurality of cold-cathode fluorescent lamps. The system includes a subsystem configured to receive at least a DC voltage and generate a first AC voltage in response to at least the DC voltage. The system also includes a power converter configured to receive the first AC voltage and convert the first AC voltage to at least a second AC voltage. The system further includes a plurality of current balancing devices. Each of the plurality of current balancing devices is configured to receive two currents and balance the two currents. The plurality of current balancing devices includes at least a first current balancing device, a second current balancing device, and a third current balancing device. In addition, the system includes a plurality of lamp pairs.04-16-2009
20120032610POWER CONVERTER HAVING A FEEDBACK CIRCUIT FOR CONSTANT LOADS - A power converter having a feedback circuit for constant loads includes an input, a switch, an input voltage sense circuit, a feedback circuit, and a controller. The input is to be coupled to receive an input voltage and the switch is coupled to the input. The input voltage sense circuit is coupled to the input to generate an input voltage sense signal representative of the input voltage. The feedback circuit is coupled to an output of the power converter, where the output is electrically coupled to the input. The feedback circuit generates a feedback signal representative of an output voltage of the power converter. The controller is coupled to the feedback circuit and to the input voltage sense circuit to control switching of the switch to regulate an output current at the output of the power converter in response to the feedback signal and the input voltage sense signal.02-09-2012
20110254467TWO-TERMINAL CURRENT CONTROLLER AND RELATED LED LIGHTING DEVICE - A two-terminal current controller regulates a first current flowing through a load, which is coupled in parallel with the two-terminal current controller, according to a voltage established across the two-terminal current controller. When the voltage established across the two-terminal current controller does not exceed a first voltage, the two-terminal current controller conducts a second current related to a rectified AC voltage, thereby limiting the first current to zero and regulating the second current according to the load voltage. When the voltage established across the two-terminal current controller is between the first voltage and a second voltage, the two-terminal current controller conducts the second current, thereby limiting the first current to zero and limiting the second current to a constant value larger than zero. When the voltage established across the two-terminal current controller is greater than second voltage, the two-terminal current controller is turned off.10-20-2011
20100320937POWER SUPPLY CIRCUIT FOR POWERING LIGHT EMITTING DIODE - A power supply circuit for receiving an input voltage and outputting a driving voltage to at least one LED string. The power supply circuit includes a rear-stage converting circuit and a control circuit. The rear-stage converting circuit is used for receiving the input voltage and converting the input voltage into a compensating voltage. The control circuit is connected to the rear-stage converting circuit and the LED string for detecting the magnitude of a current passing through the LED string, thereby controlling the current passing through the LED string to be identical. The driving voltage is outputted from the power supply circuit. The driving voltage is a summation of the input voltage and the compensating voltage.12-23-2010
20100320936HIGH-VOLTAGE LED DRIVE SCHEME WITH PARTIAL POWER REGULATION - A high-voltage LED drive scheme with multi-stage power regulation. The multi-stage power regulation applies two components of voltage to drive the LED strings. This scheme achieves high efficiency, small size and low cost.12-23-2010
20110163694ANIMAL-ADAPTED ILLUMINATION METHOD AND SYSTEM - An illumination method, comprising the steps of emitting (07-07-2011
20110163693CIRCUIT ARRANGEMENT AND METHOD FOR OPERATING AT LEAST ONE LED - A circuit arrangement for operating at least one LED may include an operational amplifier; wherein a first connection of the LED is coupled to a connection for a DC supply voltage; a transistor which is coupled in series with the first connection and a second connection for the LED and can be operated in an analog manner, wherein the transistor has a control electrode, a reference electrode and a working electrode, wherein the control electrode is coupled to the output of the amplifier, wherein the working electrode is coupled to the connection for a supply voltage; and a current measuring resistor which is coupled in series between the reference electrode and a reference potential, wherein the voltage dropped across the current measuring resistor is coupled to the inverting input of the amplifier; wherein at least one load is coupled in parallel with the first and second connections for the LED.07-07-2011
20110163692Circuit Arrangement and Method for Operating a Light Source - A method for operating at least one light source, in which an input voltage (U07-07-2011
20110163691System and Method for Managing Backlight Luminance Variations - An LED assembly containing separately-controllable regions of LEDs with temperature sensing devices placed to measure the temperature within each region of LEDs. When the temperature difference between two regions becomes higher than an acceptable maximum, the system may adjust the power to one or more LED regions to maintain luminance uniformity. The regions can be arranged vertically or horizontally or both. A software processor may be used to interpret the data from the temperature sensing devices and control the power sent to the various LED regions. Embodiments can be used at least in LED backlights for LCD displays or for LED displays.07-07-2011
20120268034ILLUMINATION SYSTEM AND ILLUMINATION APPARATUS - An illumination system includes a plurality of illumination apparatuses, each of the illumination apparatuses including a light source, a detection sensor for sensing presence and absence of a moving object, a wireless communication unit for transmitting a sensing signal of the detection sensor to other illumination apparatuses and for receiving a sensing signal from other illumination apparatuses and a control unit for controlling an output of the light source based on the sensing signal of the detection sensor or the sensing signal transmitted from other illumination apparatuses. If the detection sensor of one of the illumination apparatuses senses the moving object, at least one of remaining illumination apparatuses is controlled together by the sensing signal wirelessly transmitted from said one of the illumination apparatuses.10-25-2012
20100207545ELECTRONIC DIMMER CIRCUIT - An electrical dimmer circuit comprising the electrical dimmer circuit for dimming the electrical power of a plurality of lighting means having at least one digital input channel, at which digital low-voltage input signals for specifying the light power of the various lighting means can be received, and having at least two output channels, on which output signals for dimming the electrical power of the respectively assigned lighting means can be output by pulse width modulation of a high alternating voltage.08-19-2010
20100244737Dual Voltage and Current Control Feedback Loop For an Optical Sensor System - A dual voltage and current control feedback control loop for an optical sensor system. A power supply provides a regulated DC voltage. A current source receives the regulated DC voltage and provides switched current to a light source. A current feedback representative of the current to the light source is provided to the power supply on a feedback path when the current source is driving the light source. A voltage feedback representative of the DC voltage is provided to the power supply on the feedback path when the current source is not driving the light source.09-30-2010
20100283409LED Driver and Start-Up Feedback Circuit Therein - An LED driver includes a start-up feedback circuit, an operating feedback circuit and a multiplexer. The start-up feedback circuit has first terminals for receiving LED feedback voltages each delivered from at least one LED coupled to an output terminal for outputting an output voltage, of the LED driver, and generates a start-up feedback voltage accordingly. The operating feedback circuit has second terminals for receiving the LED feedback voltages, and generates an operating feedback voltage accordingly. The multiplexer selects the start-up feedback voltage for initial boost of the output voltage when the LED driver is initially activated, and selects the operating feedback voltage for following boost of the output voltage when the output voltage increases to a certain value.11-11-2010
20100283410DRIVE CIRCUITS FOR ELECTRO-LUMINESCENT LAMPS - A drive circuit for delivering an AC voltage to an array of electro-luminescent lamps (11-11-2010
20120262089Lighting fixture with replaceable light source - A LED illuminator includes positive and negative electrodes of different configurations and a LED lamp with a plurality of the LED illuminators. The LED lamp includes two or more elastic jacks, in each of which a positive electrode or a negative electrode is arranged. The elastic jack has a positive connection point and a negative connection point respectively corresponding to distal and proximal ends of the positive electrode or the negative electrode inserted therein so that the LED lamp is in electrical connection with a power supply unit. In addition, the LED illuminators may be in parallel connection. Accordingly, a slight touch of the LED illuminator allows the illuminator to be inserted into or removed from the respective elastic jack when replacing the LED illuminators of the lamp.10-18-2012
20110080118DC-DC CONVERTER - A DC-DC converter for driving one or more LED (04-07-2011
20110080117DISTRIBUTED ARCHITECTURE VOLTAGE CONTROLLED BACKLIGHT DRIVER - A backlight system for light emitting diodes (LEDs), the backlight system constituted of: a controllable power source; a plurality of LED based luminaires arranged to receive power in parallel from the controllable power source; a plurality of driving circuitries, each of the plurality of driving circuitries arranged to control the light output of at least two of the plurality of LED based luminaires and further arranged to output information regarding the voltage drop of at least one of the at least two LED based luminaires controlled thereby, wherein the controllable power source is arranged to output a voltage whose value is responsive to the output information.04-07-2011
20110080116Solid State Lighting Devices Including Thermal Management and Related Methods - Provided is a solid state lighting apparatus that includes multiple light emitting diodes (LEDs) including at least a first LED and a second LED. The apparatus includes a thermal sensor that is configured to provide a temperature signal corresponding to an operating condition of the solid state lighting apparatus and a control circuit that is configured to receive the temperature signal and to selectively interrupt electrical current to a portion of the plurality of light emitting diodes responsive to the temperature signal including a value that exceeds a high temperature limit.04-07-2011
20120146545DRIVER CIRCUIT WITH PRIMARY SIDE STATE ESTIMATOR FOR INFERRED OUTPUT CURRENT FEEDBACK SENSING - A LED driver circuit and an isolated DC-DC converter therefor are presented, in which a primary side state estimator circuit is provided for inferred output current sensing for closed loop control of pulse width modulated flyback or buck converters.06-14-2012
20120146548LED-BASED LIGHTING FIXTURES AND RELATED METHODS FOR THERMAL MANAGEMENT - Disclosed is a light emitting diode (LED)-based lighting fixture including an LED and a voltage supply configured to provide electrical power to the LED. The LED-based lighting fixture also includes a temperature sensor configured to determine a temperature at a selected location of the lighting fixture; and a controller connected between the temperature sensor and the voltage supply and configured to determine an ambient temperature and a drive current based on the ambient temperature and to provide an input voltage to the LED based on the drive current. A method of controlling the operational lifetime of an LED, a computer readable medium and an apparatus are also described.06-14-2012
20120146547Power Supply Device and Method for a Lighting System with Light-Emitting Diodes and Lighting Assembly Comprising One Such Device - The power supply device and method comprise selection of a supply voltage or current to be applied to a lighting system with light-emitting diodes. A processing circuit performs automatic detection of the direction of connection of said lighting system by injecting at least one polarity test current pulse for detection of current flow. Monitoring of the supply voltage and current during the polarity test current pulse, and reversal of the direction of the current or voltage for monitoring the direction of current flow for attribution of the direction of the supply voltage or current, are also performed. The device and method also comprise detection of the type of lighting system to be supplied with regulated voltage or with regulated current according to the dynamic resistance of said system.06-14-2012
20110084627Shelf Lighting Device And Method - The present invention provides various embodiments for apparatuses, systems, and methods for lighting devices used in shelving, displays, and the like. Some embodiments provide lighting device comprising elongated extrusions with a first surface and a second surface proximate the first surface. The second surface may be reflective. One or more light emitting devices may be mounted at the first surface of the extrusion. The first surface is angled with respect to the second surface such that at least a portion of the light emitted from the light emitting devices reaches the second surface. If the second surface is reflective, at least a portion of the emitted light will be reflected from the second surface. A protective and possibly light diffusive lens may be provided between the first and second surfaces. In other embodiments, lighting systems may be provided with a plurality of lighting devices as described above. One or more power transfer devices may be provided to connect the lighting devices in vertical and/or horizontal arrangements, and at least one power supply may be provided to power the power transfer devices and lighting devices. Additionally, dimmer devices with integrated sensors may be included to dim the lighting devices when reduced illumination is desired.04-14-2011
20100072921Lighting System Utilising RJ45 Patch Lead - A luminaire has an aluminium body with an opening extending longitudinally therethrough from a front face from which, in use, light is emitted, and a rear face to which, in use, a power coupler is connectable. A circuit board is mounted in the body proximate to the front face, which circuit board carries a plurality of LEDs. A power board carrying an RJ45 socket is mounted on the rear face of the body, the power board being electrically connected to the circuit board by a pair of wires. The wires are clipped into wire guides mounted in the body. A lens shroud mounts in the opening in the body in front of the circuit board and is secured in position by screws, the lens shroud having a plurality of cylindrical apertures formed therein corresponding in number and pattern to the number and pattern of LEDs on the circuit board such that each aperture aligns with one of said LEDs, shrouding its associated LED such that the light emitted therefrom is collimated.03-25-2010
20100060198LED Lamp and Method for Producing a LED Lamp - A lamp provided with at least two LEDs of substantially the same colour and at least one driver for feeding each of said LEDs, wherein said at least one driver is adapted to feed said at least two LEDs during operation of the lamp at a different power level such that the largest difference in colour temperature of any pair of said LEDs during operation is less than the largest difference in colour temperature of any pair of said LEDs if being fed at an equal operational power level.03-11-2010
20100060199ILLUMINATION POI - An illumination poi is provided, comprising light emitters and light waveguides optically coupled to the light emitters. In some embodiments, the light waveguides are optical fibers. A microchip light controller, associated with the light emitters, varies the light entering the optical fibers, and facilitates spectacular light pattern upon rotation of the illumination poi in the dark.03-11-2010
20110148324METHODS AND SYSTEMS FOR LED DRIVER HAVING CONSTANT OUTPUT CURRENT - A control circuit for a switched mode power supply includes a transconductance amplifier circuit for receiving a voltage signal related to a current from an input of the power supply and producing a first signal, an analog signal processor coupled to the amplifier circuit for receiving the first signal and a second signal from the input of the power supply and a third signal from an output of the power supply. The analog signal processor is configured to produce a fourth signal as a function of the first, the second, and the third signals. An adder circuit is coupled to the fourth signal and a dimmer control signal, and the adder circuit is configured to output a fifth signal. A comparator circuit is coupled to the adder circuit for providing a control signal to a power transistor that controls current flow in the power supply based on comparison of the fifth signal and a reference signal.06-23-2011
20100026209LED driving circuit and method - A LED driving circuit includes a regulator to provide an output voltage to a LED light source, a current source to control the driving current of the LED light source, and a controller to detect the voltage of the current source to generate a control signal for the regulator to regulate the output voltage at a low level. There are no resistors on the current path established by the LED light source and current source, and the regulator may maintain the voltage of the current source as low as possible, thereby improving the power efficiency and reducing the power consumption.02-04-2010
20100026208Apparatus, System and Method for Cascaded Power Conversion - An apparatus, method and system are provided for power conversion to supply power to a load such as a plurality of light emitting diodes. An exemplary apparatus comprises: a first power converter stage having a first power switch and a first inductive element; a second power converter stage having a second power switch and a second inductive element; a plurality of sensors; and a controller. The second power converter stage provides an output current to the load. The controller is adapted to use a sensed input voltage to determine a switching period, and is further adapted to turn the first and second power switches into an on-state at a frequency substantially corresponding to the switching period while maintaining a switching duty cycle within a predetermined range.02-04-2010
20100019695Backlight driving circuit - A backlight driving circuit includes a light driving unit, which includes a constant current unit, and a light source operated by the constant current unit. The light driving unit further includes a feedback control unit and a detection circuit. The detection circuit detects the light source and outputs at least a voltage feedback signal to the feedback control unit. The feedback control unit obtains a prestored power parameter corresponding to the voltage feedback signal and outputs an adjusting signal to the constant current unit to adjust the constant current of the light source.01-28-2010
20100019694PROTECTION CIRCUIT AND DISCHARGE LAMP DRIVING DEVICE EMPLOYING THE SAME - A discharge lamp driving device includes a power stage circuit, a transformer circuit, a control circuit, a feedback circuit and a lamp protection circuit. The lamp protection circuit includes a current sensing circuit, a reference voltage selecting circuit, a comparing circuit and a protection signal generating circuit. The current sensing circuit senses current signals flowing through the lamps, and transforms the current signals to voltage signals. The reference voltage selecting circuit is connected to the current sensing circuit. The comparing circuit is connected to the current sensing circuit and the comparing circuit. The protection signal generating circuit is connected between the comparing circuit and the control circuit. The control circuit is connected to the comparing circuit.01-28-2010
20120146546LOAD CURRENT BALANCING CIRCUIT - A load current balancing circuit that operates with a direct current (DC) power supply includes at least one transformer having a first inductive element adapted to couple in series with a first load and a second inductive element adapted to couple in series with a second load. The first load is parallel to the second load. The load balancing circuit further includes at least one switch adapted to operate at one or more switching frequencies associated with at least one driving signal. The switch is configured to periodically interrupt respective current flows through the first inductive element and second inductive element substantially simultaneously.06-14-2012
20090251072DC Distribution System - A direct current power system according to one non-limiting embodiment includes a direct current power source operable to distribute a direct current voltage throughout at least one structure, and at least one controller operable to selectively couple a direct current load to the direct current voltage in response to a wireless signal from an energy-harvesting switch.10-08-2009
20120306407Primary-Side Control Of A Switching Power Converter With Feed Forward Delay Compensation - An electronic system includes controller to control a switching power converter to provide power to a load. To control the amount of power provided to the load, in at least one embodiment, the controller senses a current value representing a current in the switching power converter and detects when the current value reaches a target peak value. However, due to delays in the controller and/or the switching power converter, the detected target peak value will not be the actual current peak value generated by the switching power converter. In at least one embodiment, the controller adjusts the detected target peak value with a post-detection delay compensation factor to generate a delay compensated current value that more accurately represents an actual peak current value associated with the current in the switching power converter.12-06-2012
20100141177DIMMER-CONTROLLED LEDS USING FLYBACK CONVERTER WITH HIGH POWER FACTOR - A flyback controller generates a switching signal for controlling delivery of current into a primary winding of a transformer in a flyback converter. The controller may include an output current monitoring circuit configured to generate a signal representative of an average output current in a secondary winding of the transformer based on a peak input current in the primary winding and a duty cycle of current in the secondary winding. The flyback controller may generate a switching signal that causes a chopped AC voltage from a dimmer control to be converted by the flyback converter into an average output current from a secondary winding of the transformer that is DC isolated from the chopped AC voltage and that varies as a function of the setting of the dimmer control. The flyback controller may not utilize a signal from an opto-isolator.06-10-2010
20100045210Power Factor Correction in and Dimming of Solid State Lighting Devices - An apparatus and method provides a driver circuit that provides for power factor correction (PFC) to a load, such as a solid-state lighting (SSL) device, such as, for example, a light emitting diode (LED) or an array or cluster of LEDs. A programmable reference is provided in the circuit to operate in a fixed frequency peak current mode control (FFPCMC) or in a fixed frequency average current mode control (FFACMC). A driver circuit is employed to operate the SSL device using power derived from a main power source which may be DC or AC. In a FFPCMC embodiment, a programmable power reference is programmed to be a fixed DC voltage. In a FFACMC embodiment, source input current to the circuit can be programmed to be proportional to the rectified AC voltage after a bridge rectifier.02-25-2010
20120038292CIRCUITS AND METHODS FOR DRIVING LIGHT SOURCES - A driving circuit for driving a light source includes a converter and a dimming controller. The converter coupled to a power source is operable for receiving power from the power source and for providing regulated power to the light source according to control signals. The dimming controller coupled to the converter is operable for monitoring a power switch coupled between the power source and the converter, for receiving a color change signal indicating a first set of operations of the power switch and a dimming request signal indicating a second set of operations of the power switch, for controlling the control signals to change the color of the light source in response to the color change signal, and for controlling the control signals to adjust the brightness of the light source in response to the dimming request signal.02-16-2012
20120043912Single inductor mutiple LED string driver - A single inductor multiple LED string driver comprises a switch control circuit and a current-sensing control circuit. The switch control circuit generates a plurality of digital control signals that are used to control a plurality of switches coupled to a plurality of strings of LEDs. Each switch is selectively turned on and off by each corresponding digital control signal. The current-sensing control circuit determines an integrated charge amount provided by each current that flows from an input voltage through each LED string, through each switch, through a common inductor, and through a main switch to ground. In response to the determined integrated charge amount, the current-sensing control circuit generates an on-time control signal that controls the on-time of each switch such that the average current flowing across each LED string is equal to each other. Furthermore, the total current flowing across each LED string is regulated to a predefined value.02-23-2012
20100097010PARALLEL TRANSFORMER WITH OUTPUT SIDE ELECTRICAL DECOUPLING - A higher power package is provided in a smaller package by providing at least first and second magnetics in parallel in first and second transformers. To limit degrading performance associated with circulating current between the two transformers, the transformers are electrically decoupled. In a preferred embodiment, the circuit includes parallel primary and secondary windings of the transformer that are decoupled electrically on an output side. Particularly, diodes are provided in a preheat portion of the circuit so that once the preheat phase is terminated, the diodes prevent current flow in one direction through the preheat portion of the circuit.04-22-2010
20100097009SWITCHING CONVERTER FOR LIGHTING WITH LIGHT INTENSITY AS FEEDBACK AND LIGHT EMITTING APPARATUS USING THE SAME - A light emitting apparatus comprises a light emitting element and a switching converter comprising a conversion circuit for converting an operating electric signal to generate the driving electric signal, a feedback circuit having a light detecting element for detecting a luminous intensity of the light emitting element and generating a feedback signal, and a control circuit for receiving the feedback signal, comparing the received feedback signal with a reference electric signal, and controlling the conversion circuit based on comparison results to adjust the driving electric signal. Alternatively, the light detecting element detects ambient light and the control circuit controls the conversion circuit based on comparison results to stop or enable outputting of the driving electric signal.04-22-2010
20110050132AREA BASED LIGHTING CONTROL SYSTEM INCLUDING LOCAL LUMINAIRE CONTROL - The invention relates to local luminaire control in an area based lighting control system. A basic idea of this invention is to use a soft switch assigned to one or more luminaries of an area based lighting control system to locally control the luminaire/ies, wherein the soft switch is adapted for generating an appropriate signal for the area based lighting control system, that puts the luminaire/ies in the desired state. An embodiment of the invention provides an area based lighting control system (03-03-2011
20110050131LIQUID CRYSTAL DISPLAY DEVICE AND METHOD OF DRIVING THE SAME - A backlight driving circuit for a liquid crystal display device including a light emitting diode controlling portion for outputting a brightness control signal, a light emitting diode driving portion that amplifies an input voltage to produce the first driving voltage and that uses the brightness control signal to adjust a second driving voltage, a backlight unit including a plurality of channels, each of the plurality of channels including a light emitting diode array supplied in common with the first and second driving voltages from the light emitting diode driving portion, a feedback voltage terminal on each of the plurality of channels that outputs a feedback voltage to the light emitting diode controlling portion, a detecting element on each of the plurality of channels that detects the feedback voltage, and a current set resistor disposed between the plurality of channels and a ground terminal of the light emitting diode driving portion.03-03-2011
20110050130BUCK CONVERTER AND METHOD FOR PROVIDING A CURRENT FOR AT LEAST ONE LED - A Buck converter may include an input for connecting a DC voltage source; an output for connecting an LED; and a diode, an inductor and a main switch; wherein the diode and the main switch are coupled in series, wherein the inductor is coupled between the connecting point for the diode and the main switch, and a first output connection, wherein the converter further includes: a first auxiliary switch supplied with a first voltage; and a second auxiliary switch supplied with a second voltage, wherein the first auxiliary switch and the second auxiliary switch are coupled to the main switch such that the first voltage stipulates the switch-off time for the main switch and the second voltage stipulates the switch-on time for the main switch.03-03-2011
20110050129BUCK CONVERTER FOR MAKING POWER AVAILABLE TO AT LEAST ONE LED - A buck converter for providing a current for an LED includes an input for connection of a DC voltage source; an output for connection of the LED; and a Buck diode, a Buck inductor and a Buck main switch which has a control electrode, a working electrode and a reference electrode. The diode and the main switch are coupled in series, wherein the connecting point between the diode and the main switch is coupled to the second output connection. The converter includes: an auxiliary winding which is coupled to the inductor and has a connection which is coupled to the second input connection and a connection which is coupled to the control electrode of the switch, wherein the auxiliary winding is coupled to the inductor such that, when current is flowing through the switch, a current is provided through the auxiliary winding to the control electrode of the switch.03-03-2011
20110316448SYSTEM AND APPARATUS FOR CONTROLLING LIGHT INTENSITY OUTPUT OF LIGHT EMITTING DIODE ARRAYS - Disclosed herein is a system for controlling a drive current of an LED that includes a controller configured to estimate a junction temperature of the LED at a location of a heat sink. The system also includes a driver configured to change a drive current to the LED in response to a command from the controller. Also disclosed is a method of determining drive currents for LEDs in an array that includes determining a required light output intensity at a first time for each LED; estimating heat generated by each LED at the first time; solving heat flow equations for the array at the first time; estimating a junction temperature for each of the LEDs at the first time; and determining a drive current for the required light intensity at the first time for each of the LEDs based on the junction temperature.12-29-2011
20110316447CIRCUITS AND METHODS FOR POWERING LIGHT SOURCES - A controller for regulating a current through a light-emitting diode (LED) light source includes a first reference pin for receiving a first reference signal indicative of a target average level, and a dimming control pin for receiving a dimming signal. The controller regulates an average level of the current to the target average level. The current is regulated according to the first reference signal and a ramp signal if the dimming signal has a first level. The ramp signal is synchronized with the dimming signal. The current is cut off if the dimming signal has a second level.12-29-2011
20110316446POWER CONVERTER WITH COMPENSATION CIRCUIT FOR ADJUSTING OUTPUT CURRENT PROVIDED TO A CONSTANT LOAD - A power converter for constant loads includes an energy transfer element, a switch, a controller, and a compensation circuit. The energy transfer element is coupled to receive a rectified voltage having a non-blocked portion and a blocked portion, where an amount of the blocked portion corresponds to a phase angle. The controller is coupled to control switching of the switch to regulate an output current of the power converter in response to a plurality of signals. The plurality of signals includes a peak input voltage signal and a feedback signal, where the peak input voltage signal is representative of a peak input voltage of the power converter and the feedback signal is representative of the output voltage of the power converter. The compensation circuit is coupled to adjust at least one of the plurality of signals in response to the phase angle exceeding a phase angle threshold.12-29-2011
20100134046LED REPLACEMENT LAMP AND A METHOD OF REPLACING PREEXISTING LUMINAIRES WITH LED LIGHTING ASSEMBLIES - A lighting apparatus for retrofitting an existing luminaire includes a plurality of light emitting diodes (LED) of similar or differing wavelengths arranged and configured in at least one light bar array, a heat sink module thermally coupled to the at least one light bar array, an electronic power module electrically coupled to the at least one light bar array, and a plate coupled to the at least one light bar array, electronic power module and the heat sink module, the plate arranged and configured for coupling to the luminaire to provide quick and easy installation and replacement of the at least one light bar array, heat sink module and electronic power module into and from the luminaire.06-03-2010
20120206064Hybrid Power Control System - A hybrid power control system for providing dynamic power control to illumination systems in which a power source can supply any one of a range of AC or DC voltages. One or more switch mode power supplies incorporating one or more linear and switch mode regulator circuits combined to dynamically control current, voltage and power to the illumination system. A microprocessor or other integrated circuit device to receive and send control information in order to regulate the power to a light emitting device One or more output drive stage(s) capable of delivering a wide dynamic current range, channel bonding and protection circuitry compatible with standard or common anode illumination systems.08-16-2012
20110156615BACKLIGHT DRIVING CIRCUIT FOR USE IN LCD PANEL - A backlight driving circuit includes a voltage-regulating circuit, a self-excited oscillation circuit, a transformer, a rectifying circuit and a filtering circuit. The voltage-regulating circuit is used for receiving an input voltage and adjusting the input voltage into a DC voltage. The self-excited oscillation circuit generates an oscillation voltage according to the DC voltage. The transformer includes a first primary winding assembly and a secondary winding assembly. The first primary winding assembly is connected with the self-excited oscillation circuit for receiving the oscillation voltage, so that the secondary winding assembly is induced to generate an AC output voltage. The rectifying circuit is used for rectifying the AC output voltage into a DC driving voltage. The filtering circuit is connected to the rectifying circuit and plural LED strings for filtering the DC driving voltage, so that the plural LED strings are driven by the filtered DC driving voltage.06-30-2011
20120056561BACKLIGHT APPARATUS, DISPLAY APPARATUS AND LIGHTING APPARATUS - A backlight apparatus including: a light-emitting element block on which a plurality of light-emitting elements are arranged; a plurality of driving control units each of which is configured to control driving for each of the plurality of light-emitting elements by supplying a current to the light-emitting element block; and a main control unit configured to generate a control signal for performing driving control for each of the plurality of driving control units, and to output the control signal to one of the plurality of driving control units, wherein the plurality of driving control units are connected in a daisy chain scheme, and the main control unit includes, in the control signal, identification information for identifying at least one of the plurality of driving control units and control data for performing driving control on light-emitting elements assigned to a driving control unit identified by the identification information.03-08-2012
20120001570METHOD OF CONTROLLING AN LED, AND AN LED CONTROLLER - A method is disclosed of controlling a LED, comprising driving the LED with a DC current for a first time, interrupting the DC current for a second time such that the first time and the second time sum to a period, determining at least one characteristic of the LED whilst the DC current is interrupted, and controlling the DC current during a subsequent period in dependence on the at least one characteristic. The invention thus benefits from the simplicity of DC operation. By operating at the LED in a DC mode, rather than say in a PWM mode, the requirement to be able to adjust the duty cycle is avoided. By including interruptions to the DC current, it is possible to utilise the LED itself to act as a sensor in order to determine a characteristic of the LED. The need for additional sensors is thereby avoided.01-05-2012
20100102755Method for Controlling a Half-Bridge Circuit and Corresponding Half-Bridge Circuit - A circuit arrangement for operation of lamps, comprising a half-bridge arrangement which has an upper and a lower electronic switch (Q04-29-2010
20100244738AUDIO MIXING CONSOLE CAPABLE OF ADJUSTING BRIGHTNESS OF LED OPERATOR, AND METHOD OF OPERATING THE SAME - An audio mixing console includes a brightness adjusting mode selection button and an adjustment subject specification button. A user operates the brightness adjusting mode selection button to set up a brightness adjusting mode, and operates the adjustment subject specification button to specify any color LED of RGB or all colors as an adjustment subject. When an LED button is operated, brightness of an LED of a color of an adjustment subject in a multicolor LED unit incorporated in the LED button is increased one step by one step. In another example, in response to an operation of a button, brightness of an LED of a color of the adjustment subject in the multicolor LED unit incorporated in a plurality of LED buttons other than this button is increased one step by one step. This work is carried out for every LED and LED button.09-30-2010
20120007523BACKLIGHT MODULE AND AN LCD THEREOF - A backlight module and a liquid crystal display (LCD) device thereof are proposed. The backlight module includes a DC/DC converter producing a positive/negative voltage level. The backlight module can output the positive and negative levels of driving voltage from an output end of the inverter to drive LEDs through alternately switching. Besides, a constant current can be obtained with designs of power on/off periods and energy-storing inductors to prevent LEDs employing current limiting resistors from having too low current efficiency and from being burnt out.01-12-2012
20120007522ILLUMINATION DEVICE - An illumination device configured to diffuse essential oils includes a plurality of light emitting diodes, a heat dissipation module, a thermal detector, and a controller. The heat dissipation module is thermally connected to the light emitting diodes. A receiving part is defined in the heat dissipation module. The receiving part is configured for receiving essential oils. The thermal detector is adjacent to the receiving part and configured for detecting a temperature of the essential oils. The controller is electrically connected to the light emitting diodes and the thermal detector. The essential oils are heated by the heat generated by the light emitting diodes through the heat dissipation module. The temperature of the essential oils is controlled by the controller according to a thermal signal from the thermal detector.01-12-2012
20100225248ILLUMINATED VISOR VANITY - A visor vanity including a visor body for a vehicle having an electrical system is provided. The visor body includes a visor mirror, at least one light source, a switch, a regulator circuit and a timer. The switch causes at least one energy source that is independent of the electrical system of the vehicle to generate a first voltage signal. The regulator circuit is operably coupled to the switch and to the energy source for transmitting a second voltage signal in response to the first voltage signal so that the light source receives the second voltage signal. The timer is powered by the energy source for causing the regulator circuit to disable the operation of transmitting the second voltage signal in response to the timer achieving a predetermined count value.09-09-2010
20100123415Emulating light emission systems - The present invention is a fire fly emulation apparatus and method that functionally provides control of fire fly light emission emulation at each of the one or a plurality of light sources, in preferred embodiments LEDs. In some embodiments, the invention features integrated circuitry to each of the LEDs that affords accurate control of emulation of light emission of fire flies, or other light sources in some embodiments, such as timing, duration, delay, decay, ramping and fade emission control. In some preferred embodiments, the invention features transistors monolithically integrated with the LED. In still further embodiments control of current is provided to a plurality of LED light sources. The present invention affords preferable costs in manufacturing in a mechanically and electrically simple design embodied as fire fly emulation systems as both apparatus and method embodiments. The features of the present invention serve to provide embodiments that have applicability in decoration or other functional light display, generally, while providing preferred control that may not only emulate fire flies, but other light emissions.05-20-2010
20120013266APPARATUS FOR DRIVING LIGHT EMITTING DEVICE WITH OVER-CURRENT AND OVER-VOLTAGE PROTECTION - An apparatus for driving a light emitting part includes a DC/DC converter for supplying an amplified driving voltage to the light emitting part; a constant current circuit for controlling a current flowing through the light emitting part; a converter controller for controlling the DC/DC converter and the constant current circuit; a current sensor for sensing and converting a current flowing to an anode of the light emitting part into a voltage; a feedback controller for controlling a feedback current according to a magnitude of the voltage from the current sensor; an optical coupling part for performing optical coupling to transmit the feedback current as a feedback voltage; and a main controller for determining whether an over-current is occurring according to a magnitude of the feedback voltage and stopping an operation of the converter controller when the over-current is occurring.01-19-2012
20120056560DC POWER SOURCE UNIT AND LED LAMP SYSTEM - A DC power source unit 03-08-2012
20120056559INTEGRATED CIRCUIT FOR DRIVING HIGH-VOLTAGE LED LAMP - An integrated circuit for driving high-voltage LED lamps is applied to a rectified alternative current (AC) power and a plurality of LED stacks. The integrated circuit includes a control unit, a plurality of current-clamping units which electrically connect to the control unit and the LED stacks respectively, and a plurality of current-sensing units which electrically connect to the current-clamping units and the control unit. When the rectified power is switched on, the current-sensing unit constantly monitors the electrical current flowing through the respective current-clamping unit and feeds back the monitored data to the control unit. The control unit sequentially switches on or off the current-clamping units according to the combinatorial logic state of the monitored data.03-08-2012
20130154508SIMO CONVERTERS THAT GENERATE A LIGHT OUTPUT - A power converter includes a single magnetic element in communication with a plurality of output channels. Each output channel includes one or more light-emitting diodes (LEDs) that may output a desired light output. Desired amounts of current may be discharged from the single magnetic element through the LEDs to generate the desired light output. The current may be drawn through the LEDs by switching “on” and “off” switches connected to the LEDs. A controller in communication with the power converter may generate switching signals to turn “on” and “off” the switches to draw the desired amounts of current. The controller may measure the current and determine whether to adjust the switching signals if the measured current draw is not the desired current draw in order to generate the desired light output from the LEDs.06-20-2013
20120062148LUMINESCENCE DRIVING APPARATUS, DISPLAY APPARATUS, AND DRIVING METHOD THEREOF - A luminescence driving apparatus, a display apparatus, and a driving method thereof are provided. The luminescence driving apparatus includes: a driving circuit which is connected to a light-emitting device and drives the light-emitting device according to a control pulse having a fluctuating amplitude; a controller which, if an internal current of the light-emitting device is less than or equal to a threshold value, selects a position from among a plurality of different positions of the driving circuit based on the amplitude of the control pulse, senses a voltage at the selected position and determines whether a short-circuit has occurred between the light-emitting device and the driving circuit using a level of the sensed voltage; and a protector which if it is determined that the short-circuit has occurred, performs a protection operation with respect to the light-emitting device.03-15-2012
20120062147High efficiency drive method for driving LED devices - A set of unique concept of driving multiple LED strings with non-dissipative current balancing and non-dissipative synchronous current regulation is disclosed. Inductive components and capacitive components are utilized in the non-dissipative current balancing approach to drive the LED strings from AC supply source. The synchronous regulation method regulates the LED current with pulse width modulated switching action in synchronous with the AC supply source frequency. Both simultaneous and independent control of the LED string operation can be realized with synchronous regulation method when combined with suitable circuit configuration.03-15-2012
20110089866LED Lighting System - The LED light fixture includes white LEDs having multiple, different color temperatures. Preferably, white LEDs having color temperatures of about 3500 and about 5000 degrees Kelvin (K) are selected. The intensity of each LED may be varied and the light radiated from the LEDs is mixed together. The resulting light emitted from the housing is a white light having a variable color temperature ranging from about 3500 to about 5000 K. The housing is preferably extruded aluminum. A portion of the housing is configured to mix the light together and to focus the light such that the output light is about thirty degrees off center. Electrical loading is off set to minimize load on power supplies.04-21-2011
20110089865LOAD DRIVING CIRCUIT AND MULTI-LOAD FEEDBACK CIRCUIT - A load driving circuit and a multi-load feedback circuit is disclosed. The load driving circuit and the multi-load feedback circuit are adapted to drive a LED module that has a current balancing circuit for balancing the currents flowing through LEDs. The load driving circuit and the multi-load feedback circuit modules the electric power transmitted by the LED driving apparatus to a LED module according to voltage level(s) of current balancing terminals having insufficient voltage in the current balancing circuit, and so the voltage levels of the current balancing terminals are higher than or equal to a preset voltage level, further increasing the efficiency thereof.04-21-2011
20120119676FLYBACK POWER CONVERTER WITH DIVIDED ENERGY TRANSFER ELEMENT - A divided structure energy transfer assembly for use in a flyback power converter is disclosed. An example energy transfer includes first and second magnetic cores. First and second input windings are wound around the first and second magnetic cores, respectively. The first input winding is coupled in parallel with the second input winding. First and second output windings are wound around the first and second magnetic cores, respectively. A rectified output of the first output winding is coupled in series with a rectified output of the second output winding. The first and second input windings have a first polarity and the first and second output windings have a second polarity. The first polarity is an opposite of the second polarity.05-17-2012
20100244739DRIVING DEVICE, BACKLIGHT WITH THE DRIVING DEVICE AND DRIVING METHOD OF BACKLIGHT - The present disclosure relates to a driving device for a backlight with a plurality of LED units. The driving device can comprise a control module for controlling output voltage of the driving device; a light modulation module for adjusting overall current of the backlight; and a current regulating module for obtaining signals for adjusting individual current of each LED unit and adjusting the individual current of each LED unit according to the signals.09-30-2010
20100244740MULTI-CHIP LIGHT EMITTING DIODE LIGHT DEVICE - An electric lamp includes a first light source and a second light source and power circuitry configured to selectively energize the first light source and the second light source. The first light source is configured to produce light that is substantially free of wavelengths below about 530 nanometers, and the second light source is configured to product light having wavelengths of less than about 530 nanometers. The electric lamp is configured to produce white or near-white light in a variety of color temperatures, while retaining good color rendering index.09-30-2010
20120161667LUMINAIRE WITH TOUCH PATTERN CONTROL INTERFACE - The present invention relates to a luminaire (06-28-2012
20110181204BALANCING TRANSFORMERS FOR MULTI-LAMP OPERATION - A ring balancer comprising a plurality of balancing transformers facilitates current sharing in a multi-lamp backlight system. The balancing transformers have respective primary windings separately coupled in series with designated lamps and have respective secondary windings coupled together in a closed loop. The secondary windings conduct a common current and the respective primary windings conduct proportional currents to balance currents among the lamps. The ring balancer facilitates automatic lamp striking and the lamps can be advantageously driven by a common voltage source.07-28-2011
20110181203DRIVING CIRCUIT AND METHOD FOR DRIVING CURRENT-DRIVEN DEVICES AND ELECTRONIC DEVICE APPLYING THE SAME - Provided is a light emitting diode (LED) driving circuit for driving a plurality of LED groups. The LED driving circuit includes: a voltage converter, for converting an input voltage into an output voltage, the output voltage coupled to a respective first terminal of each of the LED groups; and a controller, coupled to the voltage converter for controlling the voltage converter, the controller including a plurality of output channel terminals respectively corresponding to a plurality of output channels, one or more of the output channels are enabled and one or more of the output channels are disabled. One or more of the output channel terminals corresponding to the one or more enabled output channels are coupled to second terminals of corresponding ones of the LED groups, and one or more of the output channel terminals corresponding to the one or more disabled output channels are coupled to a reference voltage.07-28-2011
20110181202LOCAL DIMMING CONTROL METHOD AND APPARATUS OF EDGE-TYPE BACKLIGHT MODULE - A local dimming control method and apparatus of an edge-type backlight module are provided. The edge-type backlight module has a plurality of backlight units positioned at least one side of a display area. The local dimming control apparatus includes: a configuration unit, for dividing the display area into a plurality of display blocks; and a local dimming control unit, coupled to the configuration unit, for setting respective backlight intensities of the display blocks through controlling a plurality of luminance settings of the backlight units. The local dimming control method includes: dividing the display area into a plurality of display blocks; and performing a local dimming control operation to set respective backlight intensities of the display blocks through controlling a plurality of luminance settings of the backlight units.07-28-2011
20120133300COLOR MIXING AND DESATURATION WITH REDUCED NUMBER OF CONVERTERS - A system is disclosed to automatically establish proper biasing for light sources in a color mixed projection system having multiple light sources which are active at the same time. Responsive to a feedback signal, a single DC-DC converter generates the bias voltage for the light sources. Comparators compare a headroom signal for each light source to a reference value to generate comparator output signals. The comparator output signals are processed by a channel selector and a digital filter/DAC module. The channel selector controls a switch to selectively provide and combine a headroom signal with an output of the digital filter/DAC module to create the feedback signal. By monitoring each headroom value, the bias voltage is adjusted, based on the feedback signal, until every headroom signal reaches the reference value thereby achieving sufficient biasing for every active light source in the color mixed projection system.05-31-2012
20120133299Multi Channel LED Driver - A driver circuit includes a buck converter associated with each LED chain for supplying a load current thereto. The buck converter receives an input voltage and is configured to provide a supply voltage to the associated LED chain such that the resulting load current of the LED chain matches at least approximately a predefined reference current value. The driver circuit further includes a switching converter that receives a driver supply voltage from a power supply and provides, as an output voltage, the input voltage for the buck converters. The switching converter is configured to provide an input voltage to the buck converters such that the maximum of the ratios between the input voltage and the supply voltages provided to the LED chains matches a predefined tolerance reference ratio.05-31-2012
20120133301ACTIVE ENCLOSURE FOR COMPUTING DEVICE - A computing device is disclosed. The computing device includes a housing having an illuminable portion. The computing device also includes a light device disposed inside the housing. The light device is configured to illuminate the illuminable portion.05-31-2012
20120313547AIRCRAFT LED LANDING OR TAXI LIGHTS WITH THERMAL MANAGEMENT - Low weight, low cost, low complexity systems and methods for performing large thermal transfer during worst-case conditions to ensure a light-emitting diode (LED) light. An exemplary device includes a housing with a sealed cavity, a circuit board having a first side attached to one side of the housing, a plurality of light sources attached to a second side of the circuit board and a material located within the sealed cavity. The material changes phase at a predefined temperature. The housing includes a plurality of protrusions that extend into the cavity. The housing and the protrusions transfer heat generated by the light sources into the material. The plurality of light sources include light-emitting diodes (LEDs). A plurality of optical elements direct light generated by the LEDs. The optical elements are attached to the circuit board.12-13-2012
20120169253MODIFYING VISUAL PERCEPTION - Various embodiments directed to modifying and enhancing visual perception are disclosed. One embodiment is directed to a camera which includes a lens system for capturing images and a lighting system providing key light above the lens system and providing fill light below the lens system. A processor controls one or more operations of the camera, including automatically enhancing the captured images and presenting the enhanced images on a display. The system and method for modifying visual perception may also be directed to a video camera mirror system, a seating system, a cosmetic package, a lipstick packaging, a polarized mirror, an illuminated cosmetic brush, a personal portrait photography management system and an illumination system for modifying visual perception.07-05-2012
20120169254DEVICE AND METHOD FOR CONTROLLING A LIGHTING SYSTEM BY PROXIMITY SENSING OF A SPOT-LIGHT CONTROL DEVICE AND SPOTLIGHT CONTROL DEVICE - Disclosed are methods and apparatus for controlling a lighting system by proximity sensing of a spotlight control device, particularly to controlling a spotlight generated by a lighting system such as a large LED lighting array by means of a spotlight control device. A device is provided for controlling a lighting system by proximity sensing of a spotlight control device, wherein a predefined area around the spotlight control device is illuminated if a proximity sensor signals presence of the spotlight control device within the predefined area.07-05-2012
20120169252LED DRIVING CIRCUIT - A Light Emitting Diode (LED) driving circuit includes a power supply circuit, an LED circuit, and a switch control circuit. The power supply circuit includes an energy storage device and a switch component connected to the energy storage device. The energy storage device stores electric power when the switch component is switched on. The LED circuit is connected to the energy storage device. The switch control circuit is connected to the switch component, and is adapted to control the on/off states of the switch component, thereby adjusting a current flowing through the LED circuit.07-05-2012
20100052571Illumination System - An illumination system includes a plurality of illumination devices and a number of sensor blocks. In each of the sensor blocks, an active sensor is provided to detect a moving object traveling within a detection area thereof and plural amplifier circuits is provided to divide a detection signal transmitted from the active sensor into plural frequency bands and for amplifying signal components of the frequency bands. Provided in a one-to-one relationship with the amplifier circuits is plural judgment units that, based on the amplified signal components of the frequency bands provided from the amplifier circuits, judges whether the moving object is travelling at a travel velocity corresponding to any one of the frequency bands. A control unit is also provided to perform a turn-on control on at least one of the illumination devices based on judgment results made by the judgment units.03-04-2010
20120176065DRIVE CIRCUIT - A plurality of resistive paths are coupled in parallel to a common node. A high side driver is operable responsive to first control signals to selectively supply current to certain ones of the resistive paths. A low side driver, including a plurality of selectively actuated current sink paths, is provided to sink current from the common node. A control logic circuit actuates a current sink path within the low side driver for each resistive path that is selectively supplied current by the high side driver. A substantially constant low side voltage drop through these sink paths is provided regardless of the number of resistive paths that are supplied current by the high side driver. A switched high side and low side configuration operating in an analogous way is also disclosed.07-12-2012
20120176064LED DRIVER AND LIGHTING APPLICATION FOR WATTAGE CONTROL - An LED driver for powering an LED fixture is described, the LED driver comprising: 07-12-2012
20120176063SYSTEMS AND METHODS FOR CONTROLLING AN OUTPUT OF A LIGHT FIXTURE - Systems and methods for controlling an output of a light fixture. A light fixture of one construction includes four or more light sources and is configured to produce an output that mimics the color temperature changes of an ideal black-body radiator based on one or more input parameters. The input parameters correspond to, for example, a desired target color and an intensity for the desired target color. A white point setting is determined based on the one or more input parameters and a relationship between the one or more input parameters and the color temperature of an ideal black-body radiator. A color temperature transform is selected based on the white point color temperature setting, and is used to determine a color coordinate corresponding to a modified target color. A set of light source output values corresponding to the modified target color are identified, and the light sources are driven to the identified output values.07-12-2012
20120187866MULTI-LAMP DRIVING SYSTEM - A multi-lamp driving system includes a filter circuit, a switch circuit, a pulse width modulation (PWM) controller, a protection circuit, transformers, and an abnormity detection circuit. Primary windings of the transformers are connected to the switch circuit in parallel, and high voltage terminals of secondary windings of the transformers are connected to lamps respectively. The abnormity detection circuit converts current signals flowing through the lamps into voltage signals, and retrieves highest and lowest voltage signals corresponding to highest and lowest current signal respectively. Then the abnormity detection circuit determines if a difference between the highest voltage signal and the lowest voltage signal exceeds a predetermined value, and generates a trigger signal if the difference between the highest and lowest voltage signals exceeds the predetermined value. The protection circuit receives the trigger signal, and controls the PWM controller to stop outputting PWM signals to the switch circuit.07-26-2012
20120187867Lighting Control System - A lighting control system (07-26-2012
20120256560LIGHT EMITTING DEVICE MODULE AND SURFACE LIGHT SOURCE DEVICE - A light emitting device package includes a package body; a first light emitting device mounted on the package body and emitting light of a particular color; a second light emitting device mounted on the package body to be adjacent to the first light emitting device, adjusting an amount of light according to a current value applied thereto to thereby control a color temperature, and emitting orange light; and a resin part sealing the first and second light emitting devices and containing at least one or more types of phosphors.10-11-2012
20120235598Method for Controlling the Operation of an Electronic Converter, and a Corresponding Electronic Converter, Lighting System and Software Product - A method for controlling the operation of an electronic converter (09-20-2012
20120235597LIGHTING POWER CIRCUIT WITH PEAK CURRENT LIMITER FOR EMI FILTER - Light e power circuits and EMI filters therefor are presented in which a depletion mode field effect transistor is connected in series with an EMI filter capacitor following an input rectifier to allow filtering of EMI and to limit capacitive currents during triac switching when powered through a phase-cutting dimmer circuit.09-20-2012
20120299511Controlling the Light Output of One or More LEDs In Response to the Output of a Dimmer - An apparatus for controlling the brightness of one or more light emitting diodes includes a sensing circuit to sense a dimming level of a dimmer. A microprocessor receives from the sensing circuit a signal indicative of the dimming level, and a drive circuit drives the one or more light emitting diodes. The microprocessor is arranged to generate a PWM waveform or current level corresponding to the dimming level and to provide the PWM waveform or current level to the drive circuit.11-29-2012
20100327772REFERENCE VOLTAGE GENERATING DEVICE, CONTROL DEVICE INCLUDING THE REFERENCE VOLTAGE GENERATING DEVICE, AND LED LIGHT EMITTING DEVICE USING THE CONTROL DEVICE - A control device and an LED light emitting device using the same are provided and technology of providing a high contrast ratio to the LED light emitting device and allowing the LED light emitting device to perform a stable operation is disclosed. The LED light emitting device includes a DC/DC converter reference voltage generator that generates a DC/DC converter reference voltage so that a minimum level of a channel voltage having a largest LED voltage drop agrees with a predetermined minimum reference voltage by detecting a plurality of channel voltages corresponding to LED voltage drops of each of a plurality of LED channels LED and an output voltage controller that controls an output voltage of the DC/DC converter using a distribution voltage corresponding to an output voltage and the DC/DC converter reference voltage.12-30-2010
20080297068Method and System for Lighting Control - A system and method for controlling an entertainment system is provided. The system can have at least one light source to generate variable light output and at least one controller coupled to the at least one light source to control the variable light output based on a number of interruptions of power supplied to the apparatus over a pre-determined time period. The variable light output can be a light temperature. The at least one light source can be a plurality of light sources, with the at least one controller having a plurality of addresses and each of the addresses designating one or more of the plurality of light sources to be controlled. The at least one controller can synchronize or unsynchronize the plurality of light sources.12-04-2008
20120262090TWO-TERMINAL CURRENT CONTROLLER AND RELATED LED LIGHTING DEVICE - A two-terminal current controller regulates a first current flowing through a load, which is coupled in parallel with the two-terminal current controller, according to a voltage established across the two-terminal current controller. When the voltage established across the two-terminal current controller does not exceed a first voltage, the two-terminal current controller conducts a second current related to a rectified AC voltage, thereby limiting the first current to zero and regulating the second current according to the load voltage. When the voltage established across the two-terminal current controller is between the first voltage and a second voltage, the two-terminal current controller conducts the second current, thereby limiting the first current to zero and limiting the second current to a constant value larger than zero. When the voltage established across the two-terminal current controller is greater than second voltage, the two-terminal current controller is turned off.10-18-2012
20120319620LED-BASED LIGHTING MODULE AND CONTROL METHOD - A light-emitting diode (LED) module includes a body assembly, a printed circuit board assembly (PCBA) having LEDs, and a power conditioning board having a controller. The PCBA and power conditioning board are encapsulated by the body assembly. The power conditioning board is driverless, i.e., characterized by an absence of a switching power supply, and includes a rectifier and reducer. The reducer detects an AC waveform zero-crossing and phase angle of AC line power, reduces the rectified voltage, and selectively turns the LEDs on or off using corresponding signals. The controller receives the reduced peak-to-peak rectified voltage from the reducer, adjusts operating parameters of the reducer in response to the phase angle and zero-crossing to illuminate or extinguish some/all of the LEDs and increase the power factor of the LED module, and adjusts the limiter to provide a constant power level to the LEDs.12-20-2012
20110037415Gls-Alike Led Light Source - The invention relates to GLS-look-alike LED light source (02-17-2011
20110037414DRIVING APPARATUS FOR LIGHT EMITTING DIODES - A driving apparatus is provided and configured to suit driving at least a string of light emitting diodes (LEDs). The driving apparatus includes a flyback power factor correction (PFC) converter, a harmonics-filtering unit and a control unit. The flyback PFC converter works in an operation mode according to a pulse-width modulation (PWM) signal and receives an AC power so as to convert the AC power into a pulsating current. The harmonics-filtering unit is coupled to the flyback PFC converter and the string of LEDs, for receiving the pulsating current and filtering out the high-frequency harmonic components in the pulsating current so as to drive the string of LEDs. The control unit is coupled to the flyback PFC converter and the harmonics-filtering unit, for producing the PWM signal according to the AC power and the pulsating current, and reducing the peak-to-average ratio (PAR) of the pulsating current.02-17-2011
20120319619CIRCUIT CAPABLE OF IMPROVING A SHIFT OF GAMMA CURVE RESULTING FROM LED TEMPERATURE RISE AND A DEVICE THEREOF - The present invention relates to an LCD technology. A circuit used for correcting a shift of the gamma curve because of light emitting diode (LED) temperature rise and a device thereof are proposed. The circuit includes at least one temperature sense resistor, an analog-to-digital converter (ADC), and a lookup table. One end of the temperature sense resistor is connected to the ADC which is connected to the lookup table. The present invention can improve image quality rapidly. The structure of the circuit proposed by the present invention is simple, making it easy to be performed, which is good for energy saving and environmental protection.12-20-2012
20110227505ORGANIC LIGHT EMITTING DISPLAY DEVICE - An organic light emitting display device includes a display unit having pixels located at crossing regions of scan, control, data and sensing lines. Scan, control line, and data drivers respectively supply scan, control, and data signals to the scan, control, and data lines. A switching unit selectively couples the data lines to output lines of the data driver, a reference voltage source, or a negative bias voltage source. A sensing unit senses degradation information of an organic light emitting diode in the pixels and threshold voltage of a driving transistor in the pixels through the sensing lines. A control block stores the sensed degradation information and threshold voltage information. A timing controller is configured to generate a second data by converting an externally inputted first data using the degradation information and the threshold voltage information, and supply the second data to the data driver.09-22-2011
20120081037CIRCUIT AND LIGHTING SYSTEM FOR DIMMING AN ILLUMINANT - The invention relates to a method and to a circuit arrangement for dimming an illuminant (04-05-2012
20120081036AUTOMATIC DROPOUT PREVENTION IN LED DRIVERS - A system and method is provided for preventing a dropout of an LED current. In one embodiment of the present invention, the system includes a voltage source, a first circuit, a second circuit, a controller, and at least one LED. The first circuit receives a reference voltage from the voltage source, receives set-point current data from the controller, and uses the reference voltage and the set-point current data to produce a threshold voltage. The threshold voltage is then provided to the second circuit, where it is converted into an output current, which is drawn through the LED. The second circuit then compares the threshold voltage to an output voltage corresponding to the output current, and provides an output to the controller. The controller then uses the output to determine whether a dropout has occurred. If a dropout has occurred, then second set-point current data is provided to the first circuit.04-05-2012
20120081035Power Conversion and Control Systems and Methods for Solid-State Lighting - A solid-state lighting system comprises a plurality of light-emitting devices (e.g., light-emitting diodes) and an alternating current to direct current (AC-DC) converter that converts AC power to DC power for powering the plurality of light-emitting devices. The AC-DC converter is configured to perform AC-DC conversion directly, without the need for or use of a bridge rectifier or step-down transformer. According to one aspect of the invention, the light-emitting devices of the solid-state lighting system are autonomous and individually powered by a plurality of DC power supplies generated from the DC power produced by the AC-DC converter. According to another aspect, a plurality of phase-offset dimmer control signals are generated based on waveform distortions in a dimming signal produced by a conventional dimmer switch. The phase-offset dimmer control signals are used to individually control the dimming of the light-emitting devices.04-05-2012
20120280638Controllable Retrofit LED Lamps and Lighting System Having an LED Lamp - The invention relates to a retrofit LED lamp (11-08-2012
20090189543METHOD OF LOCAL DIMMING, BACKLIGHT ASSEMBLY FOR PERFORMING THE METHOD AND DISPLAY APPARATUS HAVING THE BACKLIGHT ASSEMBLY - In order to perform local dimming, a driving dimming duty cycle is generated using a target gamma curve (TGV), wherein the driving dimming duty cycle corresponds to a representative grayscale value (RGV) of each of a plurality of dimming unit areas. Each of a plurality of light unit blocks of a light source is driven based on the driving dimming duty cycle, wherein the light unit blocks correspond to the dimming unit areas, respectively. Therefore, a display apparatus may display an image having a higher contrast ratio than normal.07-30-2009
20120326631LIGHTING DEVICE AND ILLUMINATION APPARATUS INCLUDING SAME - A lighting device includes lighting control units respectively provided for controlling lighting of solid state light emitting element groups irradiating light of different chromaticities and a color ratio setting unit for setting a target output ratio of the solid state light emitting element groups. In an xy chromaticity diagram of an XYZ color system, a straight line connecting chromaticity coordinates of lights irradiated by a first and a second solid state light emitting element group intersects a black body locus. Further, the lighting control units include a first and a second lighting control unit for controlling lighting of the first and the second solid state light emitting element group, and the first and the second control unit perform a feedback control such that an output ratio of the second to the first solid state light emitting element group becomes equal to the target output ratio thereof.12-27-2012
20120326629SYSTEMS AND METHODS FOR INTELLIGENT CONTROL OF COLD-CATHODE FLUORESCENT LAMPS - System and method for driving one or more cold-cathode fluorescent lamps. For example, the method includes generating at least one drive signal associated with a signal frequency, the signal frequency being equal to a first predetermined frequency, receiving a current-sensing signal, the current-sensing signal being associated with a lamp current for the one or more cold-cathode fluorescent lamps in response to at least the first predetermined frequency, and determining whether the current-sensing signal is larger than a first threshold in magnitude, the current-sensing signal being related to the first predetermined frequency. Additionally, the method includes, if the current-sensing signal related to the first predetermined frequency is determined to be larger than the first threshold in magnitude at anytime during a first period of time, changing the signal frequency from the first predetermined frequency to a second predetermined frequency, the second predetermined frequency being different from the first predetermined frequency.12-27-2012
20120326630DRIVER CIRCUIT - A light-emitting diode (LED) driver circuit configured to generate a constant driving voltage irrespective of a variation in a load current. The LED driver circuit, which may generate an LED driving voltage, may include a booster configured to generate the LED driving voltage in response to a control signal, a voltage detector configured to divide an output voltage of the booster and output a detection voltage, and a booster controller configured to generate the control signal. The booster controller may select one of a pulse-width modulation signal and a fixed logic-level signal as the control signal in response to an LED current signal and the detection voltage and output a selected signal.12-27-2012
20100181933DIRECT AC-TO-DC CONVERTER FOR PASSIVE COMPONENT MINIMIZATION AND UNIVERSAL OPERATION OF LED ARRAYS - Disclosed herein is a power converter circuit for a LED lighting device. The power converter includes a pair of input terminals adapted to be connected to a signal source, at least one LED, a first circuit adapted to supply current to the at least one LED and including: a first bi-directional switch connected between one input terminal and one side of the at least one LED, and a second bi-directional switch connected between the other side of the at least one LED and the other input terminal, and a second circuit adapted to supply current to the at least one LED and including: a third bi-directional switch connected between the other input terminal and the one side of the at least one LED, and a fourth bi-directional switch connected between the one input terminal and the other side of the at least one LED.07-22-2010
20100181932LAMP-SET STRUCTURE - The present invention includes a lamp cap and a lamp body. An interior of the lamp cap is provided with an illuminating element which is electrically connected with a circuit board. The circuit board is provided with electric contacts which are exposed at a bottom of the lamp cap and peripheries of the lamp cap are provided with latching parts. The lamp body includes a handheld part and a lamp holder. An interior of the lamp holder is provided with fastening parts which correspond with the latching parts of the lamp cap, allowing the lamp cap to be engaged on and electrically connected with the lamp holder. In addition, the handheld part is provided with a control switch.07-22-2010
20100181930REGULATED POWER SUPPLY - A circuit for producing a regulated output voltage and/or current includes a rectifier to rectify an alternating current (AC) input voltage and current to produce a rectified voltage and current having a frequency. A regulator is coupled to the rectifier to produce a regulated output based on the rectified voltage and/or current. A pair of output terminals supply the regulated output to a load The circuit does not include any capacitors that substantially filter the frequency of the rectified voltage and current.07-22-2010
20100181929SERIAL TYPED IC'S TRANSMISSION METHOD OF CODING SEQUENCE - The present invention is to provide a coding sequence's transmission method for the serial typed IC used in a decoration lamp, which mainly applies a dynamic coding technology to a design requiring to initially setup the coding sequence in each time such that each IC adopts the serial typed sequencing transmission and becomes a form with an effect of varying IC address dynamically. While one of the ICs is damaged, it only needs to take a new IC then exchange it directly, and that is all. It can solve the problems of inconvenience in the past that the serial transmission ICs need to burn in the sequence numbers and positioning every IC's addresses, and it needs to get an IC with the same sequence number for exchanging while one of the ICs is damaged.07-22-2010
20100181931MULTI-LAMP DRIVING CIRCUIT - A multi-lamp driving circuit for driving a plurality of lamps includes at least one power stage circuit, at least one transformer circuit, a balancing circuit, and a control circuit. The power stage circuit converts external electrical signals to alternating current (AC) signals. The transformer circuit is connected to the power stage circuit, to convert the AC signals to high voltage electrical signals capable of driving the lamps. The balancing circuit balances current flowing through the lamps, and includes a capacitor balancing circuit and a transformer balancing circuit. The control circuit is connected between the balancing circuit and the power stage circuit, to control output of the power stage circuit according to variation of the current flowing through the lamps.07-22-2010
20130009568HYBRID MULTI-OUTPUT POWER SUPPLY AND REGULATION METHOD THEREOF - The present invention relates to a hybrid multi-output power supply and regulation method thereof. In one embodiment, a power supply includes: a driving circuit that generates an error signal based on an expected driving voltage, the expected driving voltage being determined by an LED load driving current, and where the driving circuit regulates the driving current to be substantially constant and consistent with an expected driving current; a first stage voltage regulator receiving an input voltage and the error signal, and generating a first regulation voltage consistent with the expected driving voltage, where the first regulation voltage supplies power to the driving circuit, and provides driving voltage for the LED load, and where the first regulation voltage provides sufficient expected driving current; and a second stage voltage regulator that receives the first regulation voltage, and generates a substantially constant second regulation voltage to supply power to a first load.01-10-2013
20130009569Method of controlling an outdoor lighting system, a computer program product, a controlling device and an outdoor lighting system01-10-2013
20130015783METHOD AND SYSTEM FOR ELECTRIC-POWER DISTRIBUTION - The current application is directed to control of lighting systems at individual-light-fixture, local, regional, and larger-geographical-area levels that also distribute electrical power to consumers. One implementation comprises a hierarchical lighting-control system including an automated network-control center that may control up to many millions of individual lighting fixtures and lighting elements, regional routers interconnected to the network-control center or network-control centers by public communications networks, each of which controls hundreds to thousands of individual light fixtures, and light-management units, interconnected to regional routers by radio-frequency communications and/or power-line communications, each of which controls components within a lighting fixture, including lighting elements, LED-luminaire drivers, sensors, and other devices.01-17-2013
20130015782Battery Powered Decorative Light with TimerAANM Weiser; MargaretAACI ChatsworthAAST CAAACO USAAGP Weiser; Margaret Chatsworth CA US - A decorative light in the form of a candelabrum, chandelier, or sphere, the candelabrum and chandelier having a plurality of artificial flower blossoms, each with an LED. A control circuit is electronically connected to each LED and has electronic circuitry to cause each LED to illuminate at a preselected time each day, remain illuminated for a predetermined interval, and then extinguish.01-17-2013
20130015785ILLUMINATION LIGHT COMMUNICATION DEVICE, AND ILLUMINATION APPARATUS AND SYSTEM INCLUDING SAMEAANM KAMADA; MasaoAACI OsakaAACO JPAAGP KAMADA; Masao Osaka JPAANM SHIOHAMA; EijiAACI OsakaAACO JPAAGP SHIOHAMA; Eiji Osaka JPAANM NISHINO; HiroyukiAACI OsakaAACO JPAAGP NISHINO; Hiroyuki Osaka JPAANM MAEHARA; MinoruAACI OsakaAACO JPAAGP MAEHARA; Minoru Osaka JPAANM HASITANI; YosiakiAACI OsakaAACO JPAAGP HASITANI; Yosiaki Osaka JPAANM KONDO; YosukeAACI OsakaAACO JPAAGP KONDO; Yosuke Osaka JP - An illumination light communication device includes a power supply unit controlling a load current in a light source unit to be maintained constant based on a dimming signal; an impedance unit series connected to the light source unit; a switch element parallel connected to the impedance unit to connect/disconnect the impedance unit with the light source unit; and a control unit controlling on/off of the switch element to modulate a light intensity of the light source unit such that a binary communication signal is superimposed on illumination light therefrom. The control unit controls the impedance of the impedance unit such that a difference between magnitudes of the load currents respectively when the pulse of the communication signal is superimposed and is not superimposed is maintained constant regardless of a dimming rate of the dimming signal in a range of a dimming rate equal to or greater than a predetermined level.01-17-2013
20130015784ILLUMINATION LIGHT COMMUNICATION DEVICE, AND ILLUMINATION APPARATUS AND SYSTEM INCLUDING SAMEAANM KAMADA; MasaoAACI OsakaAACO JPAAGP KAMADA; Masao Osaka JPAANM SHIOHAMA; EijiAACI OsakaAACO JPAAGP SHIOHAMA; Eiji Osaka JPAANM NISHINO; HiroyukiAACI OsakaAACO JPAAGP NISHINO; Hiroyuki Osaka JPAANM MAEHARA; MinoruAACI OsakaAACO JPAAGP MAEHARA; Minoru Osaka JPAANM HASITANI; YosiakiAACI OsakaAACO JPAAGP HASITANI; Yosiaki Osaka JPAANM KONDO; YosukeAACI OsakaAACO JPAAGP KONDO; Yosuke Osaka JP - An illumination light communication device includes a light source unit including light emitting elements; a power supply unit controlling a load current flowing through the light source unit to be maintained at a constant; a switch element connected in series to the light source unit; and a control unit configured to control on/off of the switch element to modulate a light intensity of illumination light from the light source unit such that a binary communication signal is superimposed on the illumination light. The control unit has a switching circuit to open/close a path between the light source unit and the power supply unit, controls on/off of the switching circuit based on a dimming signal to perform a dimming control on the light source unit by a PWM control, and allows the communication signal to be superimposed on the illumination light in synchronization with an ON time of the switching circuit.01-17-2013
20130020965POWER CONVERTER WITH COMPENSATION CIRCUIT FOR ADJUSTING OUTPUT CURRENT PROVIDED TO A CONSTANT LOAD - A power converter for constant loads includes an energy transfer element, a switch, a controller, and a compensation circuit. The energy transfer element is coupled to receive a rectified voltage having a blocked portion that corresponds to a phase angle. The controller is coupled to control switching of the switch to regulate an output current of the power converter in response to a plurality of signals. The plurality of signals includes a peak input voltage signal and a feedback signal. The compensation circuit is coupled to output a compensation signal to adjust at least one of the plurality of signals in response to the phase angle exceeding a phase angle threshold. The compensation circuit does not output the compensation signal and does not adjust the at least one of the plurality of signals when the phase angle is less than the phase angle threshold.01-24-2013
20120242250DYNAMIC AMBIENCE LIGHTING SYSTEM - The invention relates to an ambience lighting system, typically for use in conjunction with a display device. The ambience lighting system may be of the type AmbiLight. The ambience lighting system comprises one or more light sources associated to subregions of the display screen; a content characterizer for determining content characteristics of image data of the subregions; and a controller controlling the color of the emitted ambience light of the one or more light sources in accordance with determined content characteristics of the subregions of the display screen. The subregions are configured to move from a prior position to a next position and the content characterizer and the controller are adapted for controlling the color of the emitted ambience light in accordance with the determined content characteristics of the image data of subregions of the next position. A dynamic ambience lighting is thereby obtained.09-27-2012
20120242249Controller and LED driving circuit with protection function - A controller with protection function, for controlling a transistor having a control terminal, a first terminal coupled to a load, a second terminal, is disclosed. The controller comprises a judgment unit and a current control unit. The judgment unit is coupled to the transistor and generates a current reducing signal when a potential of the first terminal of the transistor or a voltage difference between the first terminal and the second terminal of the transistor is higher than a preset value. The current control unit is coupled to the control terminal of the transistor for substantially stabilizing the current flowing through the transistor at a preset current value, and reduces the current flowing from the preset current value when receiving the current reducing signal.09-27-2012
20080246417Device, system and method for adjusting the luminous flux of a lamp - The present invention relates to a device for adjusting the luminous flux of a lamp, which, in one embodiment, comprises a conversion unit for converting a main voltage into a supply voltage to be applied to one or more lamp or light elements. The device also comprises a microcontroller which controls the conversion unit in accordance with a luminous flux adjustment program which may be based on current date and time. The device also includes a receiver (for example, a GPS receiver) to receive a broadcast signal carrying date and time information employed by controller when executing the luminous flux adjustment program or for updating a clock/calendar module. The present invention also relates to a system incorporating such a device as well as to a related method for adjusting the luminous flux of a lamp.10-09-2008
20090091271Lighting Assemblies for Vending Machines - Display cases having lighting assemblies and methods of illuminating display cases with such lighting assemblies. Embodiments of the lighting assemblies may be used in display cases of any type and particularly in those where the purchaser selects via an external mechanism (e.g., buttons) a product from a variety of products stored inside the display, such as a vending machine. Lighting assemblies are installed within a vending machine, such as on or within the vending machine shelves or product dividers, and their light emission controlled depending on the product being selected from the vending machine. In on embodiment, all light sources within the vending machine except those illuminating the selected product are dimmed. In this way, the product being selected by the purchaser can be emphasized. In other embodiments, color or multi-color LEDs are used to emit light that best compliments the color of products housed within the vending machine.04-09-2009
20080238341Color Control for Dynamic Scanning Backlight - A method of controlling the output of a luminaire by receiving a first target signal associated with a first frame; generating a first light output control signal for an on time portion of the first frame, the light output control signal responsive to the received first target signal; sampling a light output during the on time portion of the first frame, the light output being responsive to the first light output control signal; receiving a second target signal associated with a second frame, the second frame following the first frame; comparing the received second target signal with the sampled light output of the on time portion of the first frame; and generating an error signal responsive to the comparing.10-02-2008
20080238340METHOD AND APPARATUS FOR SETTING OPERATING CURRENT OF LIGHT EMITTING SEMICONDUCTOR ELEMENT - A method of determining an operating current adjustment for a light emitting semiconductor element in order to generate a predetermined brightness includes applying a test voltage to the light emitting element, determining a corresponding test current through the light emitting element, and determining the operating current adjustment dependent on the determined test current and the applied test voltage.10-02-2008
20080231213LED String Lights - The invention herein relates to a decorative light, and, more particularly, to a LED (light-emitting diode) string lights with a current-limiting device. The LED string lights comprises a plug, a plurality of leads and a plurality of LED bulbs. Said LED string lights further comprises a current-limiting device connecting to said LED bulbs in series. Said current-limiting device comprises a resistor and a shell encapsulating said resistor therein. Said shell is an assembled structure with two contact pieces fixed inside. Said resistor connects to said two contact pieces through two legs of said resistor respectively and said two contact pieces connect to leads respectively to form a circuit. The present invention provides a LED string lights with low manufacturing cost, simple manufacturing technics and great working reliability.09-25-2008
20080224635Lighting Apparatus and Method - The present invention relates to improvements in lighting systems, in particular lighting systems having variable colour temperature. We describe an apparatus for controlling two light sources using an input voltage from a mains light dimmer, the light sources comprising a first light source configured to emit light having a second colour temperature, wherein the second colour temperature is higher than the first colour temperature, the apparatus comprising an input connection for receiving the input voltage from the mains light dimmer, a sensor for sensing a value voltage of the input voltage, driving means for driving the light sources, and a controller for controlling the driving means responsive to said sensing.09-18-2008
20090015178LED driver and control method thereof - A LED driver providing a LED lighting current to a LED path, extracts the LED lighting current information from the LED path to produce a first signal including an AC component and a DC component, and extracts the DC component information of the first signal to produce a second signal to regulate an average of the LED lighting current. This LED driver implements real constant average current regulation for a LED lighting apparatus, eliminates the need of output capacitor as well as rectifier diode in most applications to simplify the circuit of the power stage, and is applicable to power stages of various modes.01-15-2009
20110273112LIGHT EMITTING DRIVER - There is provided a light emitting driver. A light emitting driver according to an aspect of the invention may include: an LED driving section driving a light emitting part according to a detection value of the light emitting part including a plurality of light emitting devices; and a detection section transmitting the detection value to the LED driving section according to a detection voltage corresponding to a magnitude of a driving current flowing through the light emitting part when an output voltage, being applied to the light emitting part, has a value smaller than a predetermined output voltage reference value, and transmitting the detection value to the LED driving section according to a magnitude of the output voltage.11-10-2011
20130134902ADAPTIVE LIGHTING SYSTEM - An adaptive lighting system having a detection unit by which one or more extrinsic variables, that is variables occurring outside the adaptive lighting system, can be detected and can be transmitted, preferably in the form of at least one electric signal, to an evaluation and control unit, to the evaluation and control unit by which a control signal can be generated from the transmitted extrinsic variable(s) and can be transmitted to one or more adaptive light source(s) and to the one or more adaptive light source(s) which is/are designed to vary one or more it its/their emission properties on the basis of the transmitted control signal.05-30-2013
20130175947DIMMING PROTOCOL DETECTION FOR A LIGHT FIXTURE - In some examples, a dimming protocol detection technology includes methods and apparatuses. In other examples, the technology includes a dimmer configured to transmit a dimming input signal. The dimming input signal is in a dimming protocol. The technology further includes a light fixture. The light fixture includes a plurality of lights and a dimming protocol detection module configured to detect the dimming protocol received in the dimming input signal. The dimming protocol is detected from a plurality of dimming protocols. The light fixture further includes a light dimming control module configured to control the plurality of lights based on the detected dimming protocol.07-11-2013
20130175948METHOD OF CONTROLLING ILLUMINATION APPARATUS - A method of controlling an illumination apparatus includes a malfunction detecting step for detecting a malfunction of an organic electroluminescence element based on its electrical characteristic, a short-circuit malfunction restoration step for applying a short-circuit malfunction restoration pulse to an element that is determined to be a short-circuit malfunction, a short-circuit malfunction restoration determination step for determining whether the element that is determined to be the short-circuit malfunction is restored, a malfunctioning element determination step for storing into a storage, when an element that is determined to be the short-circuit malfunction is not restored, individual information including identification information on the element as a malfunctioning element, and a turn-on control step for controlling the turn-on state of a light-emitting surface based on a state of distribution of the malfunctioning organic electroluminescence elements.07-11-2013
20130093356Flyback Driver for Use in a Flyback Power Converter and Related Method - According to one embodiment, a flyback power converter comprises a primary circuit including a flyback driver, and an isolated output circuit responsive to the primary circuit. The isolated output circuit is used to power a load. The flyback driver is configured to identify a load current in the isolated output circuit from an input power to the primary circuit, and to regulate the load current according to the input power. In one embodiment, the flyback driver is configured to sense an input voltage to the flyback power converter, to identify an average current value corresponding to a current through a converter switch in the primary circuit, and to multiply the average current value and the input voltage to determine the input power to the primary circuit.04-18-2013
20130099698Lighting device - A light film apparatus having an illuminated graphics panel with at least two segments that can be individually powered. A controller manages a power which is delivered from a power supply to each of the segments, so that each of the segments is either powered on, powered off or powered to an intermediate level. With the independent control of power to the different segments, it is possible to create a three-dimensional appearance of a moving image from a generally two-dimensional panel arrangement. A housing can be mounted so that the graphics panel abuts or is closely mounted to a mounting surface.04-25-2013
20130113394LIGHTING SYSTEM AND LUMINAIRE - A lighting system for controlling a plurality of light sources includes at least a first and a second light source, the second light source having a color temperature and relative luminous efficiency higher than those of the first light source. Further, the system includes: a driving unit configured to turn on and off each of the light sources; and a control unit configured to transmit a control signal to the driving unit in response to an input signal. In addition, the control unit transmits the control signal to the driving unit, to perform at least one of a fade-in control in which the first light source is turned on prior to the second light source when turning on the light sources and a fade-out control in which the second light source is turned off or is dimmed, prior to the first light source when turning off the light sources.05-09-2013
20130113393ILLUMINATING DEVICE - An illuminating device includes a connecting portion supplied with power, a conversion circuit that converts power supplied from the connecting portion, a case having a tubular shape, a support body that divides the case in the radial direction, and a plurality of light emitting diodes provided on one surface of the support body. The illuminating device further includes a drive circuit that drives the light emitting diodes, a secondary battery provided on the other surface of the support body, a charge/discharge control circuit for the secondary battery, and a control section that lights the light emitting diodes by supplied power and charges the secondary battery. The control section permits lighting of the light emitting diodes by a discharge of the secondary battery in a state in which power supply is stopped.05-09-2013
20110266974ENERGY SAVING LIGHTING SYSTEMS AND UNITS PROVIDING COORDINATED OPERATION OF HOLDING CURRENT UNITS - Holding current circuits in light sources controlled by a dimmer are operated in a coordinated manner to maintain proper operation of the dimmer without wasting energy. A plurality of light sources each including a separate holding current circuit may be controlled by a dimmer. The holding current units are selectively disabled and/or a maximum holding current drawn by the holding current units are selectively adjusted to maintain a desired current draw.11-03-2011
20130141015METHODS AND APPARATUS FOR COMMUNICATION OVER A THREE-PHASE POWER SYSTEM UTILZING A COMMUNICATION PROTOCOL - Methods and apparatus related to controlling an apparatus such as a lighting fixture utilizing a communication protocol transmitted over the power line that feeds the lighting fixture. For example, in some embodiments data is transmitted over a three-phase power system via switching of a transformer electrically coupled to the three-phase power system. Optionally, a single transformer may be utilized to transmit data to at least on apparatus coupled to a first phase line of a three-phase power system and to at least one apparatus coupled to a second phase line of the three-phase power system.06-06-2013
20080197789LIGHT EMITTING DEVICE - A light emitting device includes multiple light units each of which includes a semiconductor light source, and a current supply control means for controlling supply of current to the semiconductor light source. A control unit includes a control signal generation means for generating and providing a control signal. The light emitting device also includes switching means for controlling feeding from a DC power source to a corresponding one of the light units in response to the control signal. Each of the switching means is coupled to a corresponding one of the light units through a feed line.08-21-2008
20130147392POWER PROCESSING APPARATUS AND METHOD OF RELEASING THE RESIDUAL POWER THEREOF - A power processing apparatus includes an input port, an output port, a power transforming module, and a power releasing module. The power transforming module is between the input port and the output port to transform power into predetermined voltage or current. The power transforming module has a capacitor unit connected to LEDs in parallel. The power releasing module has a switch unit to disconnect the resistor unit and the capacitor unit when the power transforming module receives the power, and to connect the resistor unit to the capacitor unit when the power transforming module does not receive the power. Therefore, it may release the residual power to make the LED off in a short time when one turns off the power.06-13-2013
20100308746ELECTRONIC OPERATING DEVICE FOR OPERATING AT LEAST ONE DISCHARGE LAMP - An electronic operating device for operating at least one discharge lamp may include an output network having at least one input connection and at least one output connection, wherein the at least one input connection of the output network is coupled to one of a plurality of voltage rails, and wherein the at least one output connection of the output network is coupled to one of a plurality of poles of a supply voltage.12-09-2010
20120274238Illumination Device and Fixture - Technologies are described herein for an illumination device and a corresponding fixture device. The illumination device includes a luminary module for the emission of light and an identification circuit containing identifying data, while the fixture device includes a driver module for supplying power to the illumination device and a controller module. When the illumination device is connected to the fixture device, the controller module communicates with the identification circuit of the illumination device to retrieve the identifying data and causes the driver module to supply the appropriate power to the luminary module of the illumination device.11-01-2012
20120274237APPARATUS OR CIRCUIT FOR DRIVING A DC POWERED LIGHTING EQUIPMENT - An apparatus that can operate with electronic ballasts (11-01-2012
20120274236HARBOR LIGHTING CONTROL APPARATUS - A harbor lighting control apparatus is provided, which includes a plurality of slaves to perform on control or off control, and dimming control with respect to a light emitting diode (LED) array light source mounted to a lighthouse when an on control signal or off control signal, and a dimming control signal are received, and to transmit a result of the control as acknowledge signals, and a master to transmit the on control signal or off control signal and the dimming control signal to all of the plurality of slaves by a broadcast scheme, to transmit the on control signal or off control signal and the dimming control signal to an individual slave by a unicast scheme, and to recognize operational states of the plurality of slaves by receiving the acknowledge signals from the plurality of slaves. Accordingly, stable and reliably control of the harbor lighting is enabled.11-01-2012
20120274235Power Converting Circuit and Converting Controller - A converting controller, adapted to control a converting circuit to convert an electric power from an input power source, is provided. The controller comprises a duty cycle control unit, a protection enabling control unit and a protection unit. The duty cycle control unit controls the converting circuit according to a feedback signal for converting the electric power from the input power. The protection enabling control unit outputs protection enabling signals according to time results of a timing circuit. The protection unit detects the converting circuit and generates a protection signal when any circuit error is determined, so as to stop the duty cycle control unit, wherein the protection unit has a plurality of protection functions and enables the protection functions with respect to the protection enabling signals, respectively.11-01-2012
20110234122CIRCUITRY FOR DRIVING LIGHT EMITTING DIODES AND ASSOCIATED METHODS - Circuitry and methods for driving a plurality of LED strings are disclosed herein. In one embodiment, the circuitry comprises a plurality of current regulating circuits electrically coupled to the LED strings and are configured to regulate a current flowing through the LED strings. At least two control circuits are coupled to the current regulating circuits and are configured to generate a control signal according to terminal voltages of the corresponding current regulating circuits. A voltage converter is electrically coupled to the LED strings and to the at least two control circuits, and is configured to regulate the DC driving voltage according to the at least two control signals.09-29-2011
20130154510CURRENT BALANCING CIRCUITS FOR LIGHT-EMITTING-DIODE-BASED ILLUMINATION SYSTEMS - A system including a first transistor, a second transistor, and a comparator. The first transistor is configured to supply a first current to a first load connected to a first terminal of the first transistor. The second transistor is configured to supply a second current to a second load connected to a first terminal of the second transistor, wherein the first current and the second current have a predetermined ratio. The comparator is configured to compare a voltage at the first terminal of the first transistor or a voltage at the first terminal of the second transistor to a reference voltage, and to adjust, based on the comparison, biasing of the first transistor and the second transistor to maintain the predetermined ratio between the first current and the second current.06-20-2013
20130154511Universal Lighting Source Controller with Integral Power Metering - A universal lighting source controller including integral power metering for use with substantially all light source types including fluorescent, incandescent, magnetic low voltage, electronic low voltage, light emitting diode (“LED”), high density discharge (“HID”), neon, and cold cathode. The lighting source controller includes a line voltage dimming circuit that can control the intensity of light sources in a lighting circuit and measures the actual amount of power consumed by the light sources. The line voltage dimming circuit includes a triac circuit for controlling this intensity and current and voltage detection circuits for measuring the power consumption. The lighting source controller can also include low voltage dimming circuits to provide a control signal to light sources having electronic or magnetic dimming ballasts to set the intensity of these light sources.06-20-2013
20130154512SMART POWER DEVICE - A power device may include channels coupled to conductors in lines, where each one of the channels is coupled to a different one of the lines than the other channels and where the channels deliver direct current power signals over the conductors to the load devices. Each one of the load devices may be powered by a different one of the direct current power signals. The power device may include a power communicator that communicates with the load devices over the conductors that propagate the direct current power signals. The power communicator may determine a target power level for the load devices based on the communication over the conductors. The load device may adjust an amount of power in the direct current power signals in order to match the target power level.06-20-2013
20130154513Method and Apparatus for Operating a Group of Lighting Fixture Nodes - Methods and apparatus for operating a group of lighting fixture nodes (06-20-2013
20130154507CURRENT CONTROL FOR SIMO CONVERTERS - A system includes a single-inductor-multiple-out (SIMO) converter having storage circuitry in communication with a plurality of output channels, and a controller that controls and measures current flow through the SIMO converter. A signal generator may output switching signals to store current in the storage circuitry and discharge the stored current into the plurality of output channels. The discharged current may be measured and compared to a desired current draw through the output channels over a sample period. A compensator may determine whether to change one or more timing parameters used to control the flow of current through the SIMO converter.06-20-2013
20130154509LIGHT SOURCE APPARATUS - A light source apparatus has a lighting time period measuring section measuring lighting time periods of respective LEDs, a junction temperature calculating section that calculates junction temperatures of the respective LEDs, a light intensity deterioration characteristic storing section storing light intensity deterioration characteristics based on the junction temperatures of the respective LEDs, a light source drive characteristic storing section storing characteristics of power that drives the respective LEDs and light intensities, a deteriorated light intensity calculating section calculating deteriorated light intensities based on the measured lighting time periods, the calculated junction temperatures, and the light intensity deterioration characteristics stored in the light intensity deterioration characteristic storing section, and a light source power control section controlling power that drives the light sources, based on the deteriorated light intensities calculated by the deteriorated light intensity calculating section, and the characteristics stored in the light source drive characteristic storing section.06-20-2013
20130181635LED Driver with Primary Side Sensing - The disclosed switching regulator, including a controller for a switching regulator, is adaptable to supplying, or controlling the supply of, regulated current to a load that is isolated from a source of input power by a flyback transformer, and includes: (a) detecting, after transistor SW07-18-2013
20110291591DRIVING CIRCUIT AND CONTROL CIRCUIT - A driving circuit, comprising a power supply, a transistor unit and a feedback control circuit, is disclosed. The power supply is adaptor to provide an electric power to drive a load. The transistor unit comprises at least one load coupling end to couple to the load for adjusting an amount of current flowing through the load. The feedback control circuit controls an amount of the electric power provided by the power supply according to a voltage level of the least one load coupling end. Wherein, the feedback control circuit comprises an error amplifying circuit and a feedback control switch. The error amplifying circuit generates an error amplified signal according to the voltage level of the least one load coupling end, and the feedback control switch is coupled to an output of the error amplifying circuit and is switched between a turn-on state and a turn-off state based on a dimming signal.12-01-2011
20110291590SWITCHING MODE POWER SUPPLIES AND CONTROL METHODS USED THEREIN TO PROVIDE POWER FACTOR CORRECTION AND CONSTANT OUTPUT CURRENT - Switching mode power supplies (SMPS) and control methods used thereof are disclosed. An exemplifying SMPS is coupled to control an inductive device. The SMPS comprises a voltage divider and a peak controller. The voltage divider comprises a resistor and a controllable resistor connected in series through a connection node. The resistance of the controllable resistor is variable, controlled by a control signal. The voltage divider generates a limiting signal at the connection node based on a line voltage at a line voltage power node. The peak controller controls a peak current flowing through the inductive device according to the limiting signal.12-01-2011
20110298394HIGH EFFICIENCY FLASHLIGHT BEZEL - A high efficiency flashlight bezel has a heat sink that controls the heat generated by at least one LED light source. The bezel is elongated to accommodate the heat sink. A constant current driver is attached to the back of the heat sink and connects the LED to the electrical power source housed in the flashlight body. The constant current driver keeps the light output steady throughout the entire run time and provides auto dimming for low battery reserve power. The bezel is adapted to fit on a traditional flashlight body thereby upgrading a flashlight without discarding it. The light output is four times the light output than conventional flashlights. Additionally, bulb life is greatly enhanced. The bezel is adapted to fit on a traditional flashlight body thereby upgrading a flashlight without discarding it.12-08-2011
20130187567CAPACITIVE LOAD DRIVING APPARATUS AND METHOD THEREOF - A load driving apparatus and a method thereof are provided. The provided load driving apparatus includes a first rectification unit, a first conversion unit and a second conversion unit. The first rectification unit is configured to receive and rectify an AC voltage, so as to output a first DC voltage. The first conversion unit is coupled to the first rectification unit, and is configured to receive and convert the first DC voltage, so as to output a second DC voltage. The first conversion unit is further configured to adjust the second DC voltage according to a feedback signal relating to the second DC voltage. The second conversion unit is coupled to the first conversion unit, and is configured to receive and convert the second DC voltage, so as to output a third DC voltage with a constant current to drive a first capacitive load.07-25-2013
20130187568Dimming Method and System for LED Lamp Assemblies - The present document relates to a method and system for dimming low power illumination devices, such as LED (Light Emitting Diode) assemblies. A controller for a driver circuit of a light source is described. The driver circuit controls a plurality of illumination states of the light source using a power converter, which converts power from an input voltage waveform of a mains power supply into a drive signal for the light source. The controller comprises an event detection unit; a state register to store an indication of a current state of the illumination states; a state processor to determine a target state of the illumination states, based on the detected event and based on the current state; and an output control unit controls the power converter of the driver circuit to provide a drive signal for the target state.07-25-2013
20120013267LED POWER SUPPLY SYSTEMS AND METHODS - One aspect of the present invention includes a light-emitting diode (LED) power supply system. The system includes an LED regulator configured to monitor at least one LED voltage associated with a respective at least one activated LED string and to generate an LED regulation voltage based on the at least one LED voltage relative to an LED power voltage that provides power to the at least one activated LED string. The system also includes a power converter configured to generate the LED power voltage and to regulate the LED power voltage based on the LED regulation voltage.01-19-2012
20130193874POWER SUPPLY CIRCUIT AND METHOD FOR DRIVING THE SAME - A power supply circuit with high power efficiency is provided. Alternatively, a power supply circuit with high power efficiency that is suitable for driving a light-emitting device is provided. The power supply circuit can switch current control in which driving is controlled based on information on current flowing through a load and voltage control in which driving is controlled based on information on voltage applied to a load. In a period during which voltage control is performed, a current detector for detecting current flowing through the load is deactivated so that current does not flow through the current detector.08-01-2013
20130193875LIGHT SOURCE APPARATUS - A light source apparatus includes: a first light source unit; a second light source unit; and a light source control section that, divides a plurality of light sources in the first light source unit into a first light source group, light from which enters near an optical axis, and a second light source group surrounding the first light source group, and divides a plurality of light sources in the second light source unit into a third light source group, light from which enters near the optical axis, and a fourth light source group surrounding the third light source group, and performs control to decrease an output of the second light source group to be lower than an output of the first light source group and decrease an output of the fourth light source group to be lower than an output of the third light source group.08-01-2013
20130193876ADAPTIVE ENERGY PERFORMANCE MONITORING AND CONTROL SYSTEM - A controller is configured for and a corresponding method of adaptive monitoring and control of a lighting system are suited for adaptively establishing lighting parameters on a fixture by fixture basis. The controller includes a communication interface configured to communicate with a multiplicity of light fixtures, a memory for storing software routines and information associated with each of the light fixtures; and a processor coupled to the memory and the communication interface and configured to execute the software routines and selectively communicate with at least one of the multiplicity of light fixtures to adaptively establish lighting parameters for the at least one of the multiplicity of light fixtures. A method of facilitating the monitoring and control of the light fixture includes controlling a lamp circuit to provide one of a multiplicity of light levels; assessing performance parameters of the light fixture; and communicating with a central server.08-01-2013
20130200821MULTI-SCREEN DISPLAY APPARATUS AND LUMINANCE CONTROL METHOD - In the case where luminance of light to be irradiated onto a multi-screen is not homogenized over the entire multi-screen, each of an image display apparatus and image display apparatuses carries out a homogenizing process of light to be irradiated onto a multi-screen over the entire multi-screen.08-08-2013
20120068623ELECTRICAL WIRING DEVICE - The present invention is directed to an electrical wiring device that includes a lighting assembly module disposed in the housing assembly and coupled to a set of line terminals, the lighting assembly includes at least one light emitting device. An ambient light sensor is disposed in the housing assembly and substantially optically decoupled from the lighting assembly, the ambient light sensor provides an electrical sensor signal corresponding to an ambient light level at or proximate to the ambient light sensor. A rechargeable electrical storage device is coupled to the set of line terminals, the rechargeable electrical storage device being charged by the source of AC power to a predetermined voltage threshold. A control circuit is coupled to the set of line terminals, the lighting assembly module and the ambient light sensor. The control circuit is configured to provide a modulated lighting control signal to the lighting assembly module when AC power is being provided by the source of AC power, the modulated lighting control signal being a function of the AC power and the electrical sensor signal, the modulated lighting control signal being configured to adjust an intensity of the light emitted by the at least one light emitting device such that the intensity is a function of the ambient light level. The control circuit is further configured to provide a second lighting control signal configured to turn the lighting assembly ON at a predetermined intensity for a predetermined period of time when AC power is not being provided by the source of AC power, the second lighting control signal being provided by the rechargeable electrical storage device.03-22-2012
20130093357COLLECTIVE LED INTELLIGENT ILLUMINATION CONTROL DEVICE WITH POWER MEASURING AND MESSAGING FUNCTIONS - A collective LED intelligent illumination control device includes a power converter for providing the necessary working power supply to a plurality of LED lamps, and a multipurpose controller for dimming control of each said LED lamp which includes a power measurement module for measuring the power consumed by each LED lamp and recording the measured data, a scene mode input interface in conjunction with at least one existing wall switch for group switching and multi-step dimming controls, and a built-in network card and a Zigbee communication interface for communication with a remote server for remote power and dimming controls and collection of power consumption data of each said LED lamp and for wireless communication with surrounding sensors and equipment for predetermined data collection and controls.04-18-2013
20130207571SEMICONDUCTOR LIGHT EMITTING ELEMENT DRIVE DEVICE AND LIGHTING FIXTURE WITH THE SAME - A semiconductor light emitting element drive device includes: a converter circuit configured to supply a light source unit with a load current from a first-primary winding; and a current regulation circuit. The converter circuit further includes a second-secondary winding. The current regulation circuit includes a switching device (second switching device) connected in series with the second-secondary winding. In a dimming ratio of the light source unit is lower than a first ratio, the second switching device is controlled to ON and OFF so as to decrease the load current through the light source unit by a shunt of a part of the energy stored in the primary winding.08-15-2013
20130207572SOUND CONTROLLED LIGHT EMITTING DEVICE AND METHOD - A light pole is described, including an elongated member having a core and an outer shell, with light emitting elements positioned along the length of member between the core and outer shell, and a control module controlling color and intensity of light output from the light emitting elements to provide different or varying light output modes. The outer shell is partially transparent or translucent for transmission of at least some light emitted from the light emitting elements.08-15-2013

Patent applications in class Automatic regulation