Shift register and grid electrode driving device thereof

Abstract

The invention relates to a shift register and a grid electrode driving device thereof. The shift register comprises six thin film transistors directly fabricated on an array substrate; a capacitor is arranged between the grid electrode and the source electrode of the first thin film transistor; the drain electrode of the first thin film transistor is connected with the output end of a first clock signal; the grid electrode of the second thin film transistor is connected with the grid electrode of the third thin film transistor; the grid electrode of the fourth thin film transistor is connected with the drain electrode thereof; the drain electrode of the fourth thin film transistor is connected with the output end of a shift initial signal or the output end of the preceding grade, and the source electrode of the fourth thin film transistor is connected with the grid electrode of the first thin film transistor; the grid electrode of the fifth thin film transistor is connected with the output end of the first clock signal; and the grid electrode of the sixth thin film transistor is connected with the output end of a second clock signal. The invention keeps the invalid state of the output end of the current grade, ensures that grid lines can not drift and can not be affected by other noise voltages connected with the grid lines and guarantees that the shift register is in a reliable invalid state and can not result in misoperation.

Description

technical field [0001] The invention relates to a shift register and a gate drive device thereof, in particular to a shift register of a liquid crystal display and a gate drive device thereof. Background technique [0002] Thin film transistor liquid crystal display (TFT-LCD) has the characteristics of light weight, thin thickness and low power consumption, and is widely used in mobile phones, monitors, televisions and other devices. [0003] In order to display images, TFT-LCD displays with a progressive scan matrix of m×n dots. The TFT-LCD driver mainly includes a gate driver and a data driver. The data driver latches the input display data and clock signals in a timing sequence, converts them into analog signals and inputs them to the data lines of the LCD panel, and the gate driver passes the input clock signals through The shift register is converted and switched to turn on / off voltage, which is applied to the grid lines of the liquid crystal panel in sequence. In an ...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a shift register and its gate drive device, which can effectively overcome the technical defects of the existing shift register gate floating and other technical defects.

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