Patent application number | Description | Published |
20090301468 | Thermal Storage Tank for a Hot Water System and Controlling Method Thereof - A controlling method for a hot water system and a thermal storage tank for a hot water system are provided in the present invention. The method includes the steps of: (a) turning on the pump to circulate the first fluid and to provide the heat collector with the first fluid; (b) turning off the pump after the pump is on for a first predetermined time to hold the first fluid in the heat collector; (c) turning on the pump after the pump is off for a second predetermined time to circulate the first fluid again; and (d) returning to the step (b). The thermal storage tank holding a first fluid and comprising: a first inlet inputting the first fluid; a first outlet outputting the first fluid; a first inner tank holding a second fluid, exchanging a heat between the first fluid and the second fluid and having a second inlet and a second outlet; and a second inner tank having a first heater heating the first fluid, a third inlet connected to the first outlet and a third outlet outputting the heated first fluid. | 12-10-2009 |
20100066332 | Switching power supply with near zero supply current in light-load operation - Techniques for near zero light-load supply current in switching power supply are described. In one embodiment, a switching power supply comprises sub-circuits, a capacitor/inverter circuit, and a standby control circuit. The sub-circuits comprise a feedback resistor that supplies a fraction of an output voltage of the power supply, an integrator that provides an integrator output, a comparator that provides a pulse width modulated signal, a switching element that receives the pulse width modulated signal and modulates current such that the power supply provides a regulated voltage, and a monitoring circuit that provides a logic low signal when the pulse width modulated signal is absent over a period of time. The standby control circuit disables the sub-circuits when the logical low signal is detected permitting the switching power supply to operate at a minimum current, an re-enables the sub-circuits when an out of regulation signal from the capacitor/inverter circuit is detected. | 03-18-2010 |
20100072969 | System and method for near zero light-load supply current in switching regulator - Techniques for near zero light-load supply current in switching regulators are described. In one aspect a voltage regulator operating a normal mode is generating an error signal indicating a difference between the output and the regulated voltage. A control signal, at least in part based on the error signal, actively controls the output of the regulator. The control signal is monitored over period of time. The monitoring activates a signal indicating when the control signal is inactive for the period of time indicating a light-load condition. The voltage regulator is then placed in a standby mode when the signal is active and the error signal indicates the output is substantially at the regulated voltage. Portions of the voltage regulator are then disabled permitting the voltage regulator to operate at the minimum current draw. | 03-25-2010 |
20100117541 | Lighting Device - A lighting device having a built-in driver circuitry is provided. The object of the present invention is to provide a lighting device having a built-in driver circuitry for driving the lighting in order to be installed in existing lighting fixtures and for driving the lighting. The lighting device comprises at least one fluorescent lamp and a built-in driver circuitry. | 05-13-2010 |
20100141179 | Universal input voltage light emitting device - The configurations of a light emitting device are provided in the present invention. The proposed device includes a light source, an enclosure, and an integrated control circuitry coupled to the light source, enclosed in the enclosure and receiving a universal input voltage. | 06-10-2010 |
20100213865 | Pulse Width Modulation Control Device - The present invention relates to a pulse-width modulation (PWM) control device, especially to a PWM control device for use with a TRIode for an Alternating Current (TRIAC) dimmer. The PWM control device is comprised of a load, a rectifier, a PWM control module and a PWM controllable ballast. The load may be a gas discharge lamp, a motor, a heating device or a light emitting diode lamp. The rectifier is connected to a power module and rectifies a truncated sinusoidal voltage from the power module to a pulsating truncated direct current (DC) voltage. The PWM control module is connected to the power module and the rectifier and generates a PWM control signal. The PWM controllable ballast is driven by a boost circuit and is controlled by the PWM control signal that limits current to a proper value for the load. | 08-26-2010 |
20100225218 | Lighting Device - The lighting device in accordance with the present invention comprises a base, at least one ruminant and an electronic module. The base is a lamp connector and comprises a contact and an insulated cap. The at least one luminant is mounted on the base. The electronic module drives the at least one luminant, is mounted on the base and is connected electrically to the base. | 09-09-2010 |
20100244711 | Self-Calibrating White Light Emitting Diode Module - The self-calibrating WLED module in accordance with the present invention providing precisely matched current outputs by matching each output current to a reference current, wherein matching a current output to a current reference is done sequentially for a number of current outputs, restarting at a first current output after the last has been matched to the reference current. The module may be implemented with components that comprise multiple WLED strings, a controller, a transconductance amplifier, an input voltage, a generator, a reference module and multiple current regulators. The current regulators provide required current respectively to WLED strings by varying the current through the WLED strings. | 09-30-2010 |
20100283403 | Capacitance Reducing Method for a Pulsed Activated Device and Associated Devices - The present invention relates to a capacitance reducing method for a pulsed activated device and associated devices, especially to a pulsed activated device having a capacitor, which improves power factor as well as eliminating the need for large capacitance. The method comprises acts of rectifying an AC voltage to a pulsating DC voltage, sensing a zero-crossing point of the pulsating DC voltage, synchronizing the pulsating DC voltage, setting pulse duration in a pulse period and turning ON and OFF of a pulsed activated device. The device comprises a load, a rectifier, a capacitor, a driver, a controller and an optional PFC circuit. | 11-11-2010 |
20100320927 | Power Reforming Methods and Associated Multiphase Lights - The present invention relates to power reforming methods and associated multiphase lights, especially to power reforming methods and associated multiple lights that selectively turn ON and OFF to reform current to follow voltage appropriately, which provides better heat dissipation, improving power factor and color mixing capability. The method comprises acts of rectifying an AC voltage to a pulsating DC voltage, synchronizing an internal time base signal to the pulsating DC voltage, setting pulse duration in a pulse period and turning ON and OFF of an electronic device. The device comprises at least two loads, a rectifier, at least two drivers and a controller. | 12-23-2010 |
20110080104 | Line synchronized Electrical Device And Controlling Method Thereof - A controlling method for an electrical apparatus and a device thereof are provided in the present invention. The method includes the steps of: (a) providing an electrical apparatus and an AC power; (b) generating a control signal synchronized to the AC power; and (c) controlling the electrical apparatus by the control signal. The device includes a threshold detector, a phase-locked loop coupled to the threshold crossing detector and an output circuit coupled to the phase-locked loop. | 04-07-2011 |
20110084619 | Light Emitting Diode Selection Circuit - The present invention relates to a Light Emitting Diode (LED) selection circuit for an LED driver that drives multiple unequal lengths of LED strings, which selectively turns the LED strings ON and OFF corresponding to an input alternating current (AC) line voltage. The LED driver provides optimal efficiency as input AC line voltage varies from low to high voltages (i.e. 90V to 150V for nominal 120 VAC operation and 190V to 250V for nominal 220 VAC operation). Thus The LED driver can be used internationally since it accepts voltages from virtually every industrialized country in the world. The LED selection circuit in accordance with the present invention comprises a rectifier, multiple LED strings, multiple current sources and a controller. The controller generates multiple signals to the corresponding current source and turns ON and OFF the LED strings. | 04-14-2011 |
20110221401 | Power Factor Compensating Method - An approach is provided for a power factor compensating method to compensate other electronic devices that use a common power source in order to improve power factor from the perspective of a power company. The other electronic device is a type of a non-linear load, and the method enables a compensator to receive a supply voltage from the power source commonly connected to the traditional electronic devices and disables a load of the compensator for a period. The period corresponds to a range that makes an overall supply current more proportional to the supply voltage. | 09-15-2011 |
20120086393 | Device and Method for an Intermittent Load - An approach is provided for minimizing capacitance requirements of a filter capacitor of a charging device for an intermittent load. A method for charging an intermittent load that is able to pulse on and off periodically without compromising the utility of the load. The method comprises setting timestamps relating to a waveform of an input Alternating Current (AC) voltage. The timestamps are synchronized to the AC voltage and comprise on times and off times that turn the intermittent load off and on. The method further comprises charging the intermittent load during the on times. Therefore, the capacitance of the filter capacitor used for the intermittent load can be significantly reduced since there will be no voltage drop when the intermittent load has been turned off. | 04-12-2012 |
20120098650 | Device and Method For Setting Adjustment Control - A device and a method are provided for setting adjustment control for a device. The method comprises acts of generating a time base signal that is synchronized to an Alternating Current (AC) voltage, and generating a modulated AC voltage in response to an input control signal, which is referenced to the time base signal. The modulated AC voltage has a setting pattern that is formed by interrupting the AC voltage. The method further comprises acts of using the modulated AC voltage to change the device to a desired setting. The desired setting is determined from the corresponding setting pattern. | 04-26-2012 |
20130200817 | Method for Minimizing Stroboscopic Effects in PWM Driven Lighting - An approach is provided for a method that minimizes stroboscopic effects in PWM driven lighting, which comprises acts of generating at least two enabling signals that drive at least one corresponding lamp, adjusting widths of pulses of each enabling signal corresponding to specific timestamps by a predetermined rule, and forming an overall brightness output in response to the superposition of the enabling signals. Each enabling signal is synchronized to an input power of the lamp. The method of the present invention makes light from lamps using multiple phases that significantly minimize stroboscopic effect. | 08-08-2013 |
20130307424 | Device and Method for Driving an LED Light - An approach is provided for devices and methods for driving an LED light, which adjust the numbers of diodes of the LED string corresponding to the rectified AC voltage. The device comprises a power module, a LED string, a current source and a controller. The LED string has multiple LED diodes connected in series that forms a major segment and multiple minor segments. The controller is connected to the current source and the LED string, which selectively shorts the LED diodes of the minor segments. Since the number of LED diodes of the LED string is dynamically adjusted in response to the rectified voltage, the overall “on” voltage of the LED string is more closely matched to the rectified voltage, and thus the power efficiency is improved. | 11-21-2013 |
20140292212 | Device for Improving Power Efficiency for Power Factor Corrections - A device for improving power efficiency for power factor correction is disclosed, which comprises a primary load, a power module, a power factor correction module, a current source module, and a secondary load. The power module rectifies an alternating current (AC) voltage to a pulsating direct current (DC) voltage. The power factor correction module filters the pulsating direct current (DC) voltage to a driving voltage. The current source module is connected to the power module, the primary load and a side of the power factor correction module that drives the primary load with the driving voltage. The secondary load is connected to another side of the power factor correction module, and is driven by the power factor correction module. | 10-02-2014 |