Integrated gate drive circuit and display panel with same

Abstract

The invention provides an integrated gate drive circuit and a display panel with the same. The integrated gate drive circuit comprises cascaded multistage gate drive units and multistage additional gate drive units, wherein the nth-stage gate drive unit comprises a drive unit (42) and a drop-down unit (44), and the mth-stage additional gate drive unit comprises an additional drive unit (52) and an additional drop-down unit (54). A double-drop-down structure is adopted in the integrated gate drive circuit, a thin film transistor in the drop-down unit and a thin film transistor in the additional drop-down unit in the circuit can be in a bipolar voltage bias working environment, the drift of threshold voltages of the thin film transistor in the drop-down unit and the drift of threshold voltages of the thin film transistor in the additional drop-down unit are restrained effectively, the service life of the circuit is prolonged, and the circuit can meet the demands of large and medium size display panels better. Meanwhile, the circuit is simple in structure, low in power consumption and suitable for working at low temperature and high temperature.

Description

technical field [0001] The present invention relates to the field of display technology, in particular to an integrated gate driver on array (Gate Driver on Array, GOA) and a display panel with the integrated gate driver circuit. Background technique [0002] Liquid crystal displays have many advantages such as thin bodies, power saving, and less radiation, and have been widely used. Most of the liquid crystal displays currently on the market are projection type liquid crystal displays, which include a liquid crystal panel and a backlight module. The working principle of the liquid crystal panel is to place liquid crystal molecules between two parallel glass substrates, and apply a driving voltage on the two glass substrates to control the rotation direction of the liquid crystal molecules, and modulate the light emission of the backlight module to generate a picture. [0003] In recent years, the development of liquid crystal displays has shown a trend of high integration ...

AI Technical Summary

Problems solved by technology

These methods can achieve the purpose of prolonging the life of the integrated gate drive circuit to a certain extent, but because the pull-down thin film transistor is often under unipolar (positive voltage) bias, it will be subjected to a long period of positive DC voltage stress or Pulse voltage stress, the threshold voltage drift of the pull-down thin film transistor is still large after a long time of work, and the conductivity will be degraded, which will seriously affect the working life of the integrated gate drive circuit

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