Driving circuit of liquid crystal display

Abstract

The present invention provides a driving circuit of a liquid crystal display device, which improves the Vgoff characteristics of the driving circuit composed of 4 thin film transistors and 2 capacitors, and makes the characteristic change of the thin film transistor caused by the DC stress of the driving circuit composed of 6 thin film transistors minimum, so that the operating characteristics are stable. The drive circuit of the liquid crystal display device includes: the first and second transistors are connected in series between the output stage of the n-1 circuit and the Vss stage; the third transistor is driven by a clock signal; the fourth transistor is connected to the drain To the source of the third transistor; the fifth and sixth transistors are connected in series between the VDD terminal and the Vss terminal; the seventh transistor is driven by the output signal of the n+1 circuit; the eighth transistor is driven by the n+ The output signal of the circuit 1 is driven; the first capacitor is formed before the gate of the third transistor; and the second capacitor is formed between the gate and drain of the sixth transistor.

Description

technical field [0001] The present invention relates to a driving circuit of a liquid crystal display device, in particular to a liquid crystal display device suitable for improving the stability of the off-level of an output signal and the change of element characteristics based on DC voltage stress (voltage stress), thereby greatly improving the operating characteristics of the circuit Drive circuit. Background technique [0002] Generally, a CRT (Cathode Ray Tube; Cathode Ray Tube), which is one of display devices, is mainly used for monitors of various measuring equipment, information terminals, etc., represented by televisions. However, due to the weight and size of the CRT itself, It cannot meet the requirements of miniaturization and light weight of electronic products. [0003] Therefore, in order to replace CRTs, liquid crystal display devices having advantages of thinness and miniaturization are being actively developed, and are currently being developed to the ex...

AI Technical Summary

Problems solved by technology

However, in the above situation, when the panel drive is line inversion, the screen flickers (flicker) and there is a problem that the image quality is significantly reduced.

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