Shutdown control circuit, shutdown control method and display device

Abstract

The present invention relates to a shutdown control circuit, a shutdown control method, and a display device, including a control module and a voltage output module; wherein, the control module includes a control unit, and the control unit is used to start timing after detecting that the front-end system stops transmitting data, and when it reaches After a preset time, an effective trigger signal is output for the control module to output an effective control signal; the voltage output module is used for outputting an effective shutdown control signal according to the effective control signal, wherein the effective shutdown control signal is used for shutting down The driving circuit is controlled in time to release the residual charge of the pixel unit in the display device. The application can effectively prolong the time for the pixel unit to release the residual charge when the display device is turned off, better eliminate the afterimage after shutdown, and can effectively adjust the time for the pixel unit to release the residual charge to improve the quality of the product.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a shutdown control circuit, a shutdown control method and a display device. Background technique [0002] A liquid crystal display device mainly includes a display panel and a circuit board that provides various signals for the display panel. The display panel includes a gate driving circuit, a source driving circuit and a pixel array. A pixel array is formed by a plurality of pixel units intersected by a plurality of scanning lines and a plurality of data lines. Generally speaking, a pixel unit is mainly composed of a thin film transistor, a storage capacitor and a liquid crystal unit. The output terminal of the gate driving circuit is coupled to a plurality of scan lines for turning on or off a plurality of thin film transistors connected to the corresponding scan lines. The source driving circuit is connected with a plurality of data lines, and when the plurality of thin fil...

AI Technical Summary

Problems solved by technology

[0004] However, if figure 1 As shown, in the prior art, the logic input voltage VDD of the display device is used as the control signal for the XON function to be turned on. Through the voltage comparator OP, when the logic input voltage VDD is lower than the reference voltage Vref, that is, when the VDD voltage drops to the reference voltage, the comparison The device OP outputs a valid XON signal to trigger the XON function, and the thin film transistor is turned on for discharge through the residual charge of the VGH network capacitor, so that the discharge time will be limited by the capacitance value of the VGH network, which can only be achieved by increasing the capacitance of the VGH network Capacitance to prolong the action time of the XON function, but the VGH network cannot increase the capacitance without limit, so the pixel unit cannot be completely discharged

Therefore, there are certain defects in controlling XON discharge in the prior art

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