Shutdown control circuit, shutdown control method and display device

Abstract

The invention relates to a shutdown control circuit, a shutdown control method and a display device. The shutdown control circuit comprises a control module and a voltage output module, wherein the control module comprises a control unit, and the control unit is used for starting timing after detecting that a front-end system stops transmitting data, and outputting an effective trigger signal after a preset time is up, so that the control module outputs an effective control signal; and the voltage output module is used for outputting an effective shutdown control signal according to the effective control signal, and the effective shutdown control signal is used for controlling the driving circuit to release residual charges of a pixel unit in the display device during shutdown. When the display device is shut down, the time for the pixel units to release the residual charges can be effectively prolonged, the shutdown residual image phenomenon is better eliminated, the time for the pixel units to release the residual charges can be effectively adjusted, and the product quality is improved.

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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