Abstract: The invention provides a voltage stabilizing device. In the voltage stabilizing device, a signal detecting and amplifying circuit detects an operating voltage of the functional circuit, amplifies the detected operating voltage and outputs the amplified voltage signal to a logic processing circuit; the logic processing circuit adjusts a first control signal according to the amplified voltage signal and outputs the adjusted first control signal to a feedback voltage signal generating circuit; the feedback voltage signal generating circuit adjusts a feedback voltage signal according to the adjusted first control signal and outputs the adjusted feedback voltage signal to the logic processing circuit. Moreover, the logic processing circuit further adjusts a second control signal according to the adjusted feedback voltage signal and outputs the adjusted second control signal to the functional circuit, and thereby controls an output voltage of the functional circuit to be kept stable.

Abstract: The present disclosure proposes an overcurrent orotection circuit of the GOA circuit. A voltage signal from a control signal source of the GOA circuit is converted into a current signal, and then the current signal is amplified. Subsequently, a product of the amplified current signal and a load resistor is compared with a threshold voltage. If the product is larger than the threshold voltage, a controller controls a switch to output a low voltage level signal to ensure that the GOA circuit is at overcurrent protected state. In this way, the panel is prevented from being damaged due to overabundant currents. Besides, the comparison of the amplified current signal is good for decreasing detection difficulties, enhancing precision of a measurement, and lowering risk of operation mistakes. Moreover, 2D and 3D modes in overcurrent protection through different load circuits improve the effect of protection.

Abstract: The present application discloses a display panel and an angle-cutting circuit. The angle-cutting circuit includes the angle-cutting chip, the comparison module and the adjustment module, the adjustment module is coupled to the angle-cutting chip and the comparison module; the output terminal of the angle-cutting chip is used to output the angle-cutting voltage, the first input terminal of the comparison module is coupled to the output terminal of the angle-cutting chip to obtain the first voltage; the first voltage is compared to the preset threshold voltage in the comparison module, when the first voltage is less than the threshold voltage, a control signal is generated from the comparison module, and the lower limit value of the angle-cutting voltage is raised by the adjustment module according to the control signal. By the technology described above, the accuracy of angle-cutting voltage of the present application is increased, and improve product performance.

Abstract: A digital power supply circuit and a liquid crystal driving device are provided. The digital power supply circuit includes a controlling module which includes an acquiring unit for acquiring a rate of change of the digital supply voltage at an initial stage, a comparing unit for comparing the rate of change with a preset threshold value, so as to generate a control signal according to the comparing result, and a voltage reducing unit for pulling-down an input voltage of the enable terminal by using the control signal when the rate of change is greater than the preset threshold value.

Abstract: A corner cut circuit in a liquid crystal panel driving system, wherein the corner cut circuit includes: a controller to provide a first signal for a signal converter; a signal converter to convert the first signal to a second signal for controlling discharging of a discharge circuit, and to provide the second signal to the discharge circuit; and a discharge circuit to generate a corner cut voltage of the corner cut circuit according to the second signal provided by the signal converter. According to the corner cut circuit, a corner cut voltage can be automatically adjusted, a peripheral circuit is simplified, and the cost is reduced.

Abstract: The present disclosure discloses a timing sequences generation circuit and a LCD. The timing sequences generation circuit includes a PWM chip, N number of voltage input ends, N number of voltage output ends, N number of switch circuits, and N number of time delay circuits, and N is an integer larger than or equals to 2. The PWM chip includes N number of PWM output pins, and each of the PWM output pins respectively connects to one switch circuit and one time delay circuit to respectively control turn-on sequences of the N number of switch circuits. The N number of switch circuits respectively connects to the N number of voltage input ends and N number of voltage output ends.

Abstract: An over-voltage protection circuit for executing an over-voltage protection for a LED module of an electronic device. The over-voltage protection circuit includes a control unit and an over-voltage detection module, a trigger module and an adjustment module. The LED module includes a positive input port. The over-voltage detection module detects a voltage of the positive input port of the LED module and produce a detection voltage proportional to the voltage of the positive input port. The control unit controls the LED module to work or do not work according to the detection voltage. The trigger module produces corresponding trigger signals according to a 2D signal or a 3D signal output by a 2D/3D signal port. The adjustment module adjusts the proportion between the detection voltage and the voltage of the positive input port according to the trigger signal.

Abstract: The present invention discloses a gamma reference voltage ripple filter circuit and a liquid crystal display, including: a filter module to receive the gamma reference voltage from the gamma reference voltage circuit, filter the gamma reference voltage, and output the filtered gamma reference voltage to a thin film transistor liquid crystal display; a detection module to detect the filtered gamma reference voltage and obtain a detection voltage; a comparison module to compare the detection voltage and obtain a comparison result; and a regulator module to regulate the filter module according to the comparison result, and make the ripple of the filtered gamma reference voltage in a in a default range. The disclosure can stable the voltage difference in the two terminals of the liquid crystal, avoiding the instability of the reversing angle of the liquid crystal to produce flicker phenomenon, affecting the display quality.

Abstract: A voltage compensation circuit and A method thereof are provided. The voltage compensation circuit includes a power management chip, a feedback circuit, and a control circuit. A gate driving voltage (VGH) connects an input end of the control circuit, the input end of the control circuit connects to a first end of the fifth resistor (R5), and a second end of the fifth resistor (R5) connects to a forward input end of the voltage comparator, and first ends of the sixth resistor (R6) and the first capacitor (C1). A second end of the sixth resistor (R6) and a second end of the first capacitor (C1) are grounded, a backward input end of the voltage comparator connects to the reference voltage (VREF), an output end of the voltage comparator connects to a gate of the first FET (Q1). With such configuration, the display performance may be enhanced.

Abstract: The DC voltage conversion circuit includes a booster circuit and a protection circuit. When the booster circuit is under EOS test, a detection circuit of the protection circuit obtains a second detection voltage from the voltage on the VGH line. A first adjustment circuit produces a third signal based on the comparison result of the second detection voltage and a reference voltage. A second adjustment circuit produces a fourth signal based on the comparison result of the second detection voltage and the reference voltage. The third and fourth signals adjust the equivalent resistances of a first and a second feedback circuits to a third and a forth equivalent resistances, respectively. Through the adjustment of the equivalent resistances of the first and second feedback circuits, the voltage of the VGH line is restored to that when no test signal is applied.

Abstract: The present invention provides a thin film transistor gate voltage supply circuit, and the thin film transistor gate voltage supply circuit is employed to supply a gate voltage for a thin film transistor, and the thin film transistor gate voltage supply circuit comprises a voltage generation circuit and a temperature compensation circuit, and the voltage generation circuit is employed to generate an original voltage, and the temperature compensation circuit is electrically coupled to the voltage generation circuit, and the temperature compensation circuit is employed to detect an ambient temperature, and as the ambient temperature is smaller than a preset temperature, the temperature compensation circuit compensates the original voltage according to a difference value of the ambient temperature and the preset temperature to obtain a first voltage, and supplies the first voltage to a gate of the thin film transistor to drive the thin film transistor normally work.

Abstract: A voltage compensation circuit and A method thereof are provided. The voltage compensation circuit includes a power management chip, a feedback circuit, and a control circuit. A gate driving voltage (VGH) connects an input end of the control circuit, the input end of the control circuit connects to a first end of the fifth resistor (R5), and a second end of the fifth resistor (R5) connects to a forward input end of the voltage comparator, and first ends of the sixth resistor (R6) and the first capacitor (C1). A second end of the sixth resistor (R6) and a second end of the first capacitor (C1) are grounded, a backward input end of the voltage comparator connects to the reference voltage (VREF), an output end of the voltage comparator connects to a gate of the first FET (Q1). With such configuration, the display performance may be enhanced.

Abstract: The DC voltage conversion circuit includes a booster circuit and a protection circuit. When the booster circuit is under EOS test, a detection circuit of the protection circuit obtains a second detection voltage from the voltage on the VGH line. A first adjustment circuit produces a third signal based on the comparison result of the second detection voltage and a reference voltage. A second adjustment circuit produces a fourth signal based on the comparison result of the second detection voltage and the reference voltage. The third and fourth signals adjust the equivalent resistances of a first and a second feedback circuits to a third and a forth equivalent resistances, respectively.

Abstract: The control circuit for a DC-DC converter includes a differential amplifier and an oscillator, and also a multiplier and a voltage divider circuit. The multiplier has a first input terminal receiving a feedback voltage derived from an output voltage of the DC-DC converter through the voltage divider circuit, a second input terminal receiving a parameter compensation value, and an output terminal connected to a first input terminal of the differential amplifier. A second input terminal of the differential amplifier receives a reference voltage. The differential amplifier provides a differential signal to the oscillator. The oscillator is connected to a switch driver module of the DC-DC converter so as to provide an output signal whose frequency is proportional to the differential signal. The control circuit is able to effectively reduce response time, achieve fast transient transition, and significant enhance system reliability.

Abstract: The supplemental circuit is for a power supply equipped with a power management integrated circuit (PMIC). The supplemental circuit incudes a detection circuit producing input signals, a switch, a signal generation circuit producing a control signal controlling the switch's open and close according to the input signals, and a RC circuit. When the switch is closed, the PMIC and the RC circuit are series-connected to ground. The supplemental circuit resolves the reduced performance of the PMIC due to the field effect transistors (FETs) inside the PMIC suffering greater switching loss when the PMIC is constantly series-connected to ground through RC circuit.

Abstract: The DC voltage conversion circuit includes a booster circuit and a protection circuit. The booster circuit receives a first voltage, converts the first voltage into a second voltage, and provides the second voltage to a VGH line of a LCD device. The protection circuit includes a detection unit, a current-voltage conversion unit, a comparison unit, and a control unit. The detection unit detects a current flowing between the VGH line and a transmission line and obtains a detection current. The detection current is converted into a detection voltage by the current-voltage conversion unit. The comparison unit compares the detection voltage against a reference voltage. When the detection voltage is greater, the control unit issues a control signal to turn off the booster circuit. The transmission line is one of a VGL line and a VCOM line of the LCD device.

Abstract: The present disclosure discloses a voltage compensation circuit and the method thereof. The voltage compensation circuit includes a power management chip, a feedback circuit, and a control circuit. A gate driving voltage (VGH) connects an input end of the control circuit, the input end of the control circuit connects to a first end of the fifth resistor (R5), and a second end of the fifth resistor (R5) connects to a forward input end of the voltage comparator, and first ends of the sixth resistor (R6) and the first capacitor (C1). A second end of the sixth resistor (R6) and a second end of the first capacitor (C1) are grounded, a backward input end of the voltage comparator connects to the reference voltage (VREF), an output end of the voltage comparator connects to a gate of the first FET (Q1). With such configuration, the display performance may be enhanced.

Abstract: The present invention provides a power regulating circuit and a liquid crystal display device. The light emitting unit is applied with a first supply voltage for emitting light, and the power regulating circuit comprises a brightness sensing unit, a power consumption detecting unit, a control chip and a voltage regulating unit, and the brightness sensing unit senses a brightness, and the power consumption detecting unit detects a power consumption, which is a first power consumption, and the control chip compares the first power consumption with a minimum power consumption of a current brightness of the light emitting unit, and as a difference of the first power consumption and the minimum power consumption is larger than a preset threshold value, the control chip controls the voltage regulating unit to decrease an amplitude of the first supply voltage and to increase a duty ratio of the first supply voltage.

Abstract: The present invention provides a power regulating circuit and a liquid crystal display device. The light emitting unit is applied with a first supply voltage for emitting light, and the power regulating circuit comprises a brightness sensing unit, a power consumption detecting unit, a control chip and a voltage regulating unit, and the brightness sensing unit senses a brightness, and the power consumption detecting unit detects a power consumption, which is a first power consumption, and the control chip compares the first power consumption with a minimum power consumption of a current brightness of the light emitting unit, and as a difference of the first power consumption and the minimum power consumption is larger than a preset threshold value, the control chip controls the voltage regulating unit to decrease an amplitude of the first supply voltage and to increase a duty ratio of the first supply voltage.

Abstract: Disclosed is a feedback control circuit and a power management module, wherein the feedback control circuit includes a sample analysis circuit, a comparison circuit and a switch control circuit, and the sample analysis circuit samples an output signal of the power management chip, and analyzes a variation trend of the output signal to obtain a first output signal; the comparison circuit compares the first output signal and a reference signal to obtain a second output signal; the switch control circuit comprises a Pulse Width Modulation PWM control circuit and a switch, wherein the PWM control circuit is coupled to the comparison circuit and the switch control circuit, and the switch is coupled to the power management chip, and the switch control signal adjusts a duty ratio of the switch according to the second output signal to adjust a compensation duration of the output signal of the power management chip.