Gate drive circuit

Abstract

The invention discloses a gate driving circuit which comprises multiple stages of gate driving units, wherein each of the gate driving units is used for driving one corresponding gate line on a display panel; each gate driving unit comprises an input module, a first pull-down module, an output module and a chamfering control module; each input module is used for providing a first voltage signal toa first node according to a pre-stage gate driving signal; each first pull-down module is used for providing a third voltage signal to the first node according to a first lower-stage gate driving signal; each output module is used for outputting a second voltage signal as a present-stage gate driving signal according to level of the first node; and each chamfering control module is connected withthe corresponding output module at a third node, and is used for pulling down the present-stage gate driving signal to form a present-stage gate driving signal having a chamfered waveform according to the control of a second lower-stage gate driving signal.

Description

technical field [0001] The present invention relates to the field of display technology, and more particularly, to a gate driving circuit for a display device. Background technique [0002] A display device generally includes a display panel, a gate driving circuit and a source driving circuit. Among them, the basic working principle of the liquid crystal display panel and the driving circuit is: the gate driving circuit sends a gate driving signal to the gate line through a pull-up transistor electrically connected to the gate line, turns on the TFTs of each row in sequence, and then A whole row of pixel units is simultaneously charged to their respective required voltages by the source drive circuit to display different gray scales. That is, firstly, the gate driving circuit of the first row turns on the thin film switch transistors of the first row through its pull-up transistors, and then the pixel units of the first row are charged by the source driving circuit. When ...

AI Technical Summary

Problems solved by technology

[0003] However, the existing gate drive circuit cannot easily output a scan signal with a chamfered waveform, so that when the display transistor is turned on to off, due to the large coupling capacitance between the gate and the drain in the display transistor, resulting in The jump voltage generated by the voltage on the pixel electrode is relatively large, which causes problems such as flickering and afterimages when the display panel displays images

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