Patent application number | Description | Published |
20090088980 | WEATHER FORECASTING EQUIPMENT - A weather forecast providing easy access to Internet, a subscriber's network, and a computer connected to Internet or the subscriber's network for retrieving correct weather forecast information in time without being vulnerable to interference includes a casing; and a sensor unit to detect ambient weather information, a sensor signal process and data output unit to process those signals, a display unit to display weather data, and a key-in unit disposed to the casing; and further includes an interface unit to capture data from a network, and a unit to process data captured by the interface unit and convert them into that is identified by and inputted into the display unit. | 04-02-2009 |
20100269125 | ELECTRONIC DEVICE HAVING OPTICAL DISC DRIVE - An electronic device with a built-in optical disc drive includes a casing, an optical disc drive, a first gear rack, a driving mechanism, and a transmitting mechanism. The casing comprises an upper plate and a base, and the upper plate defines an opening. The optical disc drive comprises a tray and a tray cover, and the tray is disposed in the base and faced the opening, the tray cover covering the tray. The first gear rack is connected with the tray cover. The driving mechanism is movably disposed on the casing. The transmitting mechanism includes a first end and a second end, and the gear ratio of the second end to the first end is greater than 1. The first end is meshed with the driving mechanism and the second end is meshed with the first gear rack. | 10-21-2010 |
20110051327 | ELECTRONIC DEVICE - An electronic device includes a cover, a body, and two sliding members. The body includes a first surface, a second surface opposite to the first surface, and two sliding slots. Each sliding slot extends along the first surface to the second surface. The two sliding members are pivotally coupled to the cover. The cover is rotatably and slidably coupled to the body by the two sliding members engaging with the two sliding slots, and is capable of sliding along the two sliding slots from the first surface to the second surface. | 03-03-2011 |
20130153389 | BUTTON APPARATUS - A button apparatus includes a decorating plate, and a button device attached to the decorating plate. The button device includes a securing member, a button attached to the securing member, and at least two securing arms attached to the decorating plate. The button extends through the decorating plate and is located on a top surface of the decorating plate, and the securing plate is located on a bottom surface of the decorating plate. The at least two securing arms evenly extend from an outer edge of the securing member, and the button is resiliently moveable perpendicular to the decorating plate, to deform the at least two securing arms and operate an electrical switch. | 06-20-2013 |
20140132161 | Method for Using Constant Current Driving Chip to Generate Different Currents to Drive Light Bar and Driving Circuit Thereof - The present invention provides a method for using a constant current driving chip to generate different currents to drive light bars and a driving circuit thereof. The method includes ( | 05-15-2014 |
20140132173 | Method for Multiplying Current of LED Light Bar and Associated Driving Circuit Thereof - The present invention provides a method for multiplying current of an LED light bar, which includes (1) providing a constant current driving chip that includes driving modules each having first to three pins and resistors; (2) providing an LED light bar, a power source, and a PWM control source; (3) connecting an end of one resistor to the third pin of one driving module and an opposite end grounded, connecting the first pin of the driving module to the negative terminal of the light bar, connecting the second pin of the driving module to the PWM control source, and connecting the positive terminal of the light bar to the power source; (4) repeating step (3) as necessary to have multiple driving modules electrically connected to the light bar; (5) activating the power source and the PWM control source to allow the driving modules to simultaneous drive the light bar. | 05-15-2014 |
20140152195 | Method for Overcoming Excessively High Temperature of Constant Current Driving Chip and LED Light Bar Driving Circuit - The invention provides a method for overcoming excessively high temperature of a constant current driving chip and an LED light bar driving circuit. The method includes (1) providing dual-channel constant current driving chips, each including first and second input pins, first and second output pins, and a control pin; (2) providing LED light bars, resistors, a control source, and a power source; (3) connecting ends of one light bar to the power source and the first input pin, connecting ends of another light bar to the power source and the second input pin, connecting ends of one resistor to the first output pin and grounding, connecting ends of another resistor to the second output pin and grounding, and connecting the control source to the control pin; (4) repeating step (3) until the light bars are connected; and (5) activating the control source and the power source to drive the light bars. | 06-05-2014 |
20140167629 | Direct Type LED Backlight and Liquid Crystal Display Thereof - The present invention provides a direct type LED backlight and a liquid crystal display thereof. The direct type LED backlight comprises a power converting circuit, which transfers an alternating current voltage generated from an external liquid crystal display into direct an current voltage and outputs it; multiple LED strings connected in parallel, wherein each LED string comprises a predetermined amount of LED connected in parallel, which receives a direct current from the power converting circuit; wherein, the predetermined amount is limited to that the direct current of the LED string emitting light normally is smaller than or equal to the direct current output from the power converting circuit. According to the direct type LED backlight of the present invention, it can avoid using a boost circuit in order to decrease circuit complexity and save costs. | 06-19-2014 |
20140176878 | Isolated Boost Circuit, Backlight Module and Liquid Crystal Display Device Thereof - The present invention provides an isolated boost circuit, a backlight module and a liquid crystal display device. The isolated boost circuit provides power for the LED light string in the backlight module of the liquid crystal display device, which comprises a voltage input terminal, a driving signal unit, a transformer, and a controllable reverse isolation circuit. Wherein, the transformer comprises a primary coil and a secondary coil. The voltage input terminal is connected to the dotted terminal of the primary coil, and the opposite terminal of the secondary coil is connected to the LED light string. The opposite terminal of the primary coil is connected to a | 06-26-2014 |
20140184959 | OVERVOLTAGE PROTECTION METHOD FOR BACKLIGHT DRIVE CIRCUIT OF 2D/3D MODE AND BACKLIGHT DRIVE CIRCUIT USING SAME - The present invention provides an overvoltage protection method for backlight drive circuit of 2D/3D mode and a backlight drive circuit using the method. The method includes: providing a liquid crystal display, the liquid crystal display having a 2D mode and a 3D mode, the liquid crystal display including a backlight drive circuit; the backlight drive circuit using the first overvoltage protection voltage level as an overvoltage protection voltage level when the liquid crystal display is set in the 2D mode; and the backlight drive circuit using the second the overvoltage protection voltage level as an overvoltage protection voltage level when the liquid crystal display is set in the 3D mode, the second the overvoltage protection voltage level being greater than the first overvoltage protection voltage level. Different overvoltage protection voltage levels are provided for the 2D and 3D modes so as to alleviate impact on components by over voltage. | 07-03-2014 |
20140246979 | LED Backlight Drive Circuit - The present invention provides an LED backlight drive circuit, which includes a first power supply module, an electrical inductor, a rectifier diode, a MOS transistor, an electrolytic capacitor, an LED light string, a voltage division module, a voltage comparator, a second power supply module, and an LED constant-current drive chip. The LED backlight drive circuit is arranged to include a voltage comparator in an external circuit of the LED constant-current drive chip to detect output voltage of the drive circuit so that high voltage, the voltage comparator is caused to supply a low voltage level to forcibly pull down a PWM dimming signal or an ENA enabling signal of the LED constant-current drive chip to achieve an over-voltage protection function and also enable removal of over-voltage protection module from a conventional LED constant-current drive chip. | 09-04-2014 |
20140253840 | Liquid Crystal Display Apparatus and LED Backlight Module Thereof - The present invention discloses a liquid crystal display apparatus and an LED backlight module incorporated therein, and the LED backlight module includes a boosting circuit for receiving a direct current voltage, boosting the direct current voltage, and then outputting a step-up direct current voltage; an LED string, including a plurality of LEDs connected in series, for receiving the step-up direct current voltage from the boosting circuit; a constant current driver circuit for generating a signal used for controlling the boosting circuit; and a amplifying circuit for receiving the direct current voltage, amplifying the signal from the constant current driver circuit, and then outputting a magnified signal to the boosting circuit. According to the liquid crystal display apparatus and the LED backlight module incorporated therein of the present invention, the power consumption of the boosting circuit is reduced by adding the amplifying circuit for amplifying a driving voltage to the boosting circuit. Furthermore, the driving voltage input to the MOS transistor of the boosting circuit is amplified by the amplifying circuit, and thereby the value of the DCR value of the MOS transistor is reduced. As a result, the power consumption of the MOS transistor is reduced, and the temperature is lowered, so the lifespan of the MOS transistor is extended. | 09-11-2014 |
20140285748 | LED Backlight Driving Circuit, Backlight Module, and Liquid Crystal Display Device - The present invention provides a LED backlight driving circuit, a backlight module, and a liquid crystal display device, wherein, the LED backlight driving circuit comprises: a power module, a voltage converting module, a constant current driving IC module, and a boost module. The output terminal of the power module is connected with the power source of the constant current driving IC module through the voltage converting module; the output terminal of the power module is connected with the positive electrode of the LED strings through the boost module. The boost module is provided with an over voltage alarm unit used to warn that the voltage of the positive electrode of the LED strings is high. In the present invention, it can warn immediately and notice the failures when the output voltage of the LED backlight driving circuit is too high or the failure happens. | 09-25-2014 |
20140292202 | LED Backlight Driving Circuit and Backlight Module - An LED backlight driving circuit has a voltage converting unit having an output terminal connected to a positive electrode of an LED to provide a driving voltage required by the LED, a driving unit to control the voltage converting unit to achieve a voltage conversion, and a protection unit connected in series between a negative electrode of the LED and the driving unit. A maximum allowable power of the protection unit is less than a power when the driving voltage of the LED is directly applied to the protection unit. The circuit also includes a control unit for outputting a control signal for stopping working to the driving unit when the protection unit forms an open circuit. Thus, the circuit parts can be protected, and the short-circuit protection function is more safe and reliable. | 10-02-2014 |
20140320786 | LED Backlight Source And Liquid Crystal Display Device - The present invention provides LED backlight source of liquid crystal display device. The LED backlight source includes: a boost converter, boosting input DC voltage and outputting boosted DC voltage; a plurality of LED strings connected in parallel, with each LED string including a plurality of LEDs in series and receiving boosted DC voltage from boost converter; a plurality of constant-current drivers, controlling current of each LED string, each constant-current driver controlling at least an LED string and first constant-current driver controlling connection/disconnection of boost converter; an under-voltage protection control circuit, outputting under-voltage protection voltage to constant-current drivers and constant-current drivers determining whether to stop operating based on received under-voltage protection voltage, wherein under-voltage protection voltage outputted to first constant-current driver less than under-voltage protection voltages outputted to other constant-current drivers. The LED backlight source can turn on and off LED strings simultaneously to improve the optical quality. | 10-30-2014 |
20140333227 | Light Source Module, Light Source Module Driving Circuit and Driving Method - The present invention discloses a light source module, a light source module driving circuit and a driving method. The driving circuit comprises: a power supply, which provides input voltage; a control signal generating circuit, which inputs the input voltage provided from the power supply and outputs an enable signal and a dimming signal; a driving chip, which is connected with the power supply and connected to the enable signal and the dimming signal output from the control signal generating circuit, driving the light source of the light source module according to the enable signal and the dimming signal. Through the above way, the present invention utilizes the input voltage to generate the enable signal and the dimming signal. Therefore, it only needs to provide external input voltage to control the light source module in operation, which makes the control more convenient and reliable. | 11-13-2014 |
20140333859 | Backlight Driving Board and LCD Device - The present invention discloses a backlight driving board for driving a backlight source, comprising a microprocessor and a constant current driver chip. The microprocessor receives a display mode switching signal and a synchronization signal from a liquid crystal driving board, and generating a first pulse width modulation signal corresponding to the backlight source according to the display mode switching signal and the synchronization signal. The constant current driver chip controls an operation state of the backlight source according to the first pulse width modulation signal. The present invention can reduce the signal lines between the backlight driving board and the liquid crystal driving board in order to avoid the backlight driving board from external interference because of too many signal lines, and thus be able to enhance the stability of the LCD device when operatin | 11-13-2014 |
20140339991 | BACKLIGHT DRIVE CIRCUIT WITH DUAL BOOST CIRCUITS - The present invention provides an LED backlight drive circuit, which includes a first power supply module, an electrical inductor, a rectifier diode, a MOS transistor, an electrolytic capacitor, an LED light string, a voltage division module, a voltage comparator, a second power supply module, and an LED constant-current drive chip. The LED backlight drive circuit is arranged to include a voltage comparator in an external circuit of the LED constant-current drive chip to detect output voltage of the drive circuit so that high voltage, the voltage comparator is caused to supply a low voltage level to forcibly pull down a PWM dimming signal or an ENA enabling signal of the LED constant-current drive chip to achieve an over-voltage protection function and also enable removal of over-voltage protection module from a conventional LED constant-current drive chip. | 11-20-2014 |
20140346955 | PROTECTION CIRCUIT WITH LOW ENERGY-CONSUMPTION AND DRIVING CIRCUIT THEREOF - The present invention provides a protection circuit with low energy-consumption and driving circuit thereof, including a detection circuit and a switch circuit, with switch circuit disposed between power supply circuit and peripheral step-down shunt; detection circuit and switch circuit connected for controlling. Switch circuit includes a PNP triode or P MOS transistor connected between power supply circuit and peripheral step-down shunt; wherein base of the PNP triode or P MOS transistor connected to drain of another N MOS transistor through resistor, gate of N MOS transistor connected to status pin of detection circuit. The invention solves drawbacks of existent input voltage after circuit entering a protection state, causing unnecessary energy-consumption in peripheral small-signal circuit and voltage-dividing resistors, and provides the following advantages: simple circuitry, reliable and stable consumption reduction result, without affecting response time and lifespan of circuit when circuit reactivated again, easy control and high safety. | 11-27-2014 |
20140375930 | Driver for Driving LED Backlight Source, LED Backlight Source and LCD Device - A driver for driving an LED backlight source is disclosed. The driver includes a boost converter for boosting inputted DC voltage and outputting boosted DC voltage to an LED series circuit having LEDs connected and a resistor in series, a feedback circuit for feeding back voltage across the resistor to a backlight driving circuit, and a control switch controlled by output of the backlight driving circuit depending on feedback voltage of the voltage across the resistor for keeping current flowing through the LED series circuit in a constant current. The driver drives the LED series circuit with a constant current, thereby prolonging lifetime of each LED of the LED series circuit. Furthermore, since a time period which the current flowing through the LED series circuit approaches to constant value is shorter, the driver has advantages over lower power consumption, faster response time and better operating efficiency. | 12-25-2014 |
20150042233 | LED Backlight Driving Circuit and LCD - The present invention proposes an LED backlight driving circuit comprises voltage booster circuits parallelly connected and a constant current driving IC module. The voltage booster circuits are used for conversing an input voltage into a needed output voltage to supply to an LED unit. The constant current driving IC module is used for controlling the voltage booster circuits, so that the voltage booster circuits converse the input voltage into the needed output voltage to supply to the LED unit, driving the LED unit in a constant current. The constant current driving IC module generates driving signals at different frequencies to control the voltage booster circuits respectively. The invention can set up multiple driving signals operating simultaneously at different frequencies respectively and disperse resulting harmonic wave, hence reduce EMI signals of the backlight driving circuit effectively. The present invention also proposes an LCD using the LED backlight driving circuit. | 02-12-2015 |