Abstract: The disclosure is related to a boost-buck converting circuit, a power management module and a liquid crystal driving device. The boost-buck converting circuit comprises a voltage converting module and a switching module. The voltage converting module boosts an input voltage to obtain the analog supply voltage VAA or bucks the input voltage to obtain the digital supply voltage DVDD. The switching module controls the voltage converting module to boost or buck the input voltage. The embodiment of the disclosure shares a circuit set to generate the analog supply voltage VAA and the digital supply voltage DVDD. The structure of the circuit is not complicated and requires fewer components. The embodiment of the disclosure reduces the production costs and saves the area using of the panel.

Abstract: The present disclosure provides driving circuit used to a liquid crystal display, which includes a boost module, a power management module, a power detection module and a micro controller unit, the power management module is connected to the boost module and the micro controller unit, the boost module, the power detection module and the micro controller unit are connected in sequence, the power detection module detects an output power of the boost module, and the micro controller unit switches a working mode of the boost module according to the output power. The driving circuit of the present disclosure may select different working modes according to a magnitude of the output power, so as to distribute the power and increase the efficiency, thus it may effectively solve the problem of lower efficiency and higher temperature of the component under the high power condition.

Abstract: The short-circuit protection circuit for a Gate Driver on Array (GOA) liquid crystal panel contains a power module, a first booster module, a feedback module, and a second booster module series-connected in the this order. A control module is electrically connected to the first booster, feedback, and second booster modules. The power module provides a power voltage. The control module provides a pulse width modulation (PWM) signal so as to control the first and second booster modules to transform the power voltage into driving voltage. The feedback module extracts a feedback current from a current flowing from the first to the second booster module and provides a feedback signal to the control module. When the feedback current exceeds a current threshold, the control module cuts off the PWM signal output so as to achieve short-circuit protection. A liquid crystal panel incorporating the above short-circuit protection circuit is also provided.

Abstract: A gate driving circuit and a liquid crystal display are provided, wherein the gate driving circuit comprises a gate pulse modulator and a controlling circuit, the controlling circuit comprises at least one sub controlling circuit; an input terminal of each sub controlling circuit of the at least one sub controlling circuit is connected to an output terminal of the gate pulse modulator; an output terminal of each sub controlling circuit is connected to a power source; the power source outputs a level signal to each sub controlling circuit; each sub controlling circuit controls a conduction between each sub controlling circuit and the gate pulse modulator according to the level signal, so as to control the gate driving circuit to output at least one gate driving voltage. The present disclosure may generate a plurality of gate driving voltages, thereby increasing the display effect of the liquid crystal display.

Abstract: A circuit of decreasing an electromagnetic interference of PWM pulse modulation signal has: a load detecting circuit used to output a mode detection signal to a control circuit according to a current generated by a load when the load connected to the load detecting circuit is detected; the control circuit connected to the load detecting circuit and outputting a voltage control signal to a resistance-adjustment circuit according to the mode detection signal; the resistance-adjustment circuit connected to the control circuit, adjusting a resistance of a driving resistor of the resistance-adjustment circuit and further adjusting a driving frequency of a pulse generating circuit; and the pulse generating circuit connected to the resistance-adjustment circuit and outputting a PWM pulse modulation signal according to the adjusted driving frequency. Under the heavy loading mode, the driving frequency of the PWM pulse modulation signal is adjusted so the electromagnetic interference is decreased effectively.

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 provides a liquid crystal display panel common voltage adjustment circuit and a liquid crystal display device. The liquid crystal display panel common voltage adjustment circuit adjusts a first common voltage applied to a liquid crystal display panel, and comprises a collect unit, a control unit, a feedback unit and an operation adjustment unit, and the collect unit collects a common voltage of the liquid crystal display panel to be a second common voltage, and the control unit receives the second common voltage, and sends a control signal according to a difference value of the second common voltage and a standard common voltage, and the feedback unit outputs a corresponding feedback voltage under control of the control signal, and the operation adjustment unit adjusts the first common voltage according to the feedback voltage, and outputs the first common voltage after adjustment.

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: The present disclosure provides a voltage controlling circuit of a T-CON load variation, a display panel and a display device. The voltage controlling circuit of the T-CON load variation includes: a power source chip and a voltage controlling circuit, and the voltage controlling circuit includes a photoelectric coupler, a first comparator, a second comparator, a first field effect transistor and a second field effect transistor. Therefore, the technical scheme of the present disclosure has an advantage that the Vcore may automatically vary with a variation of the load.

Abstract: An OVP circuit includes a voltage boost circuit, for boosting an input voltage into an output voltage in need and providing the output voltage to a load, a voltage control module for controlling the voltage boost circuit to boost an input voltage into an output voltage in need and for providing the output voltage to the load, an overvoltage protection module for monitoring a voltage of a positive terminal of the load to enable or disable the voltage control module, and an overvoltage adjusting module for monitoring an operation voltage of the load to adjust the overvoltage. It effectively prevents from the abnormal operation attributed by over practical operation voltage or prevents components from damage attributed by tardy protection. The present invention also proposes an LED backlight driving circuit using the OVP circuit and an LCD having the LED backlight driving circuit.

Abstract: An communications method for intercommunication by multiple electronic devices includes determining an on or off status of a first communication device, the first communication device being given master status if turned on and being used, and other devices being given slave status. If one other device is then used in preference to the first communication device, the other device is appointed as master and all other devices which are turned on are appointed as slaves. According to current state of the first communication device, the first communication device is turned off if not being used.

Abstract: The invention provides a shading circuit, comprising a shading module, a first electric switch and at least two modulate units; wherein, the shading module is coupled to a first end of the first electric switch to control the first electric switch on or off, a second end of the first electric switch is used to receive voltage signals, the second end of the first electric switch is coupled to the modulate units, nodes between the second end of the first electric switch and the modulate units are used as an output of shading circuit to output shading waveform, and the shading module is further coupled to the modulate units to control the modulate units for modulating the shading waveform so the slope of the shading waveform is a combining slope. Therefore, the waveform on shading of the shading waveform is close to a curve so the displaying efficiencies get better.

Abstract: The present disclosure provides a snubber circuit, wherein the snubber circuit is used to an electronic equipment including a pulse signal generator, a driving power source and a load, and the snubber circuit includes a current detection module, a control module and a snubber module. The current detection module is connected to the driving power source and detects the driving current of the driving power source. The control module is connected to the current detection module and the snubber module and adjusts a center frequency of the snubber module according to the driving current detected by the current detection module. The snubber module is connected to an output terminal of the pulse signal generator and filters the noise of the pulse signal. Therefore, the present disclosure may dynamically adjust a center frequency of a filtering, so as to increase a filtering performance and increase an efficiency of suppressing EMI.

Abstract: The present disclosure provides driving circuit used to a liquid crystal display, which includes a boost module, a power management module, a power detection module and a micro controller unit, the power management module is connected to the boost module and the micro controller unit, the boost module, the power detection module and the micro controller unit are connected in sequence, the power detection module detects an output power of the boost module, and the micro controller unit switches a working mode of the boost module according to the output power. The driving circuit of the present disclosure may select different working modes according to a magnitude of the output power, so as to distribute the power and increase the efficiency, thus it may effectively solve the problem of lower efficiency and higher temperature of the component under the high power condition.

Abstract: The embodiment of the present invention discloses a loop compensation circuit and a switching power supply circuit. The loop compensation circuit can comprise: a voltage detection circuit, a control chip and a RC circuit, and the voltage detection circuit is coupled to a voltage generation circuit, and employed to detect a variation of an output voltage of the voltage generation circuit; the control chip is respectively coupled to the voltage detection circuit and the RC circuit, and employed to detect a response speed of the loop compensation circuit and to adjust a parameter of the RC circuit according to the response speed of the loop compensation circuit and the variation of the output voltage of the voltage generation circuit for adjusting the response speed of the loop compensation circuit.

Abstract: The present invention discloses a driving circuit and a liquid crystal display device. The driving circuit has: a first to fourth diodes, a first and second capacitors, and an adjustable voltage source, An anode of the first diode inputs a voltage, cathodes of the first to third diodes are connected to anodes of the second to fourth diodes, a cathode of the fourth diode outputs a voltage, a first end of the first capacitor is connected to a common end of the first diode and the second diode, a second end of the first capacitor is connected to an output terminal of the adjustable voltage source, and a selective terminal thereof is used to input a selective voltage; when an input voltage is not changed, the selective voltage is different and an output voltage is different. The above-mentioned method can provide multiple different output voltages to meet with client's requirements.

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 circuit of decreasing an electromagnetic interference of PWM pulse modulation signal has: a load detecting circuit used to output a mode detection signal to a control circuit according to a current generated by a load when the load connected to the load detecting circuit is detected; the control circuit connected to the load detecting circuit and outputting a voltage control signal to a resistance-adjustment circuit according to the mode detection signal; the resistance-adjustment circuit connected to the control circuit, adjusting a resistance of a driving resistor of the resistance-adjustment circuit and further adjusting a driving frequency of a pulse generating circuit; and the pulse generating circuit connected to the resistance-adjustment circuit and outputting a PWM pulse modulation signal according to the adjusted driving frequency. Under the heavy loading mode, the driving frequency of the PWM pulse modulation signal is adjusted so the electromagnetic interference is decreased effectively.

Abstract: An LCD includes a substrate including a pixel array section and a circuit arrangement section arranged on a first side and a second side of the pixel array section. The LCD further includes: gate driving units disposed on the circuit arrangement section for outputting a scanning signal to the pixel array section based on a voltage level of clock signal and a voltage level of controlling signal, a sensing circuit for outputting an adjusting signal when an output signal output by the gate driving unit at the last stage is smaller than a predetermined value, and a level shifter for outputting clock signal at a low voltage level and controlling signal at a low voltage level to the plurality of gate driving units when receiving the adjusting signal. Meanwhile, the data transmission is terminated. Therefore, the LCD is turned off for a while, preventing from being burnt out.

Abstract: The present invention provides a chip and an electronic device. The chip comprises at least one pin, and the chip comprises at least one ESD (Electrostatic Discharge) protection circuit inside, and the ESD protection circuit is employed to reduce or eliminate a damage of electrostatic to other elements or circuit inside the chip, and the ESD protection circuit is located corresponding to a pin, and the ESD protection circuit is electrically coupled to the pin. The electronic device comprises the aforesaid chip.