Driving circuit and its control method

Abstract

A drive circuit multi-stage shift register circuit. The nth stage shift register circuit includes an enabling unit, a disabling unit and a first control unit. The enabling unit is used for generating the nth level driving signal according to the timing signal and the nth level operation signal. The disabling unit receives the logic potential signal. When the disabling unit is enabled by the enabling signal, the disabling unit controls the voltage level of the nth level operation signal and the nth level driving signal to be approximately the same as the voltage level of the first logic level signal. The first control unit is used for enabling according to the control signal to generate an enabling signal to enable the disabling unit.

Description

【Technical field】 [0001] The present invention relates to a driving circuit, and in particular to a driving circuit capable of improving voltage stability. 【Background technique】 [0002] Generally speaking, a liquid crystal display device includes a plurality of pixel units, a gate driving circuit and a source driving circuit. The source driving circuit is used for providing multiple data voltage signals. The gate driving circuit includes multiple stages of shift register circuits for providing multiple gate signals. The gate signal is used to control the turn-on and turn-off of the pixel transistor in the pixel unit, so as to control the writing of the data signal into the pixel unit. When the pixel transistor is about to be turned off, its corresponding stage shift register circuit needs to pull down the gate signal to a low logic potential. However, in the operation of the known stage shift register, the transistor responsible for controlling the driving signal to be ...

AI Technical Summary

Problems solved by technology

However, in the operation of the known stage shift register, the transistor responsible for controlling the driving signal to be pulled down to a low logic potential will be affected by the high logic potential bias for a long time, which will cause the aging of the transistor and the decline in charging capacity, and then cannot Make the gate signal stable and maintain at a low logic level, and even fluctuations may occur

The existence of the surge may cause false turn-on or leakage of the pixel transistor, or cause abnormal operation of the driving circuit

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