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GOA circuit

一种电路、电位的技术，应用在显示领域，能够解决阈值电压漂移、输出异常、GOA电路稳定性下降等问题，达到防止阈值电压漂移、保证稳定性的效果

Active Publication Date: 2016-11-09
WUHAN CHINA STAR OPTOELECTRONICS TECH CO LTD
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the existing GOA circuit, in the non-output stage, the third node P(n) will be at a high potential for a long time, and the fourth thin film transistor T4 and the seventh thin film transistor T7 will be turned on for a long time, thereby causing the fourth thin film transistor T4 The threshold voltage shift (Vth Shift) occurs with the seventh thin film transistor T7, which eventually leads to a decrease in the stability of the GOA circuit and an abnormal output

Method used

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Embodiment Construction

[0040] In order to further illustrate the technical means adopted by the present invention and its effects, the following describes in detail in conjunction with preferred embodiments of the present invention and accompanying drawings.

[0041] see figure 2 , the present invention provides a GOA circuit, including: cascaded multi-level GOA units, each level of GOA unit includes: a scan control module 100, an output module 200 electrically connected to the scan control module 100, and the output The pull-down module 300 electrically connected to the module 200, the pull-down control module 400 electrically connected to the scan control module 100, the output module 200 and the pull-down module 300;

[0042] Let n and m be both positive integers, except for the first level, second level, penultimate level, and last level of GOA units, in the nth level GOA module:

[0043] The scan control module 100 is used to control the GOA circuit to perform forward scan or reverse scan by ...

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Abstract

The invention provides a GOA circuit. The potential of a third node is controlled by a ninth thin film transistor, a tenth thin film transistor, and a resistor. Of the ninth thin film transistor, the gate is electrically connected to an mth clock signal, the source is electrically connected to a first constant voltage potential, and the drain is electrically connected to one end of the resistor. Of the tenth thin film transistor, the gate is electrically connected to an (m+2)th clock signal, the source is electrically connected to a second constant voltage potential, and the drain is electrically connected to the other end of the resistor. The ninth thin film transistor and the tenth thin film transistor are alternately switched on under control of the mth clock signal and the (m+2)th clock signal. The third node can be regularly charged and discharged, key thin film transistor threshold voltage drift caused by the fact that the third node is maintained at high potential for a long time is prevented, and the stability of the GOA circuit is guaranteed.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a GOA circuit. Background technique [0002] A Liquid Crystal Display (LCD) has many advantages such as a thin body, power saving, and no radiation, and has been widely used. Such as: LCD TV, mobile phone, personal digital assistant (PDA), digital camera, computer screen or notebook computer screen, etc., occupy a dominant position in the field of flat panel display. [0003] GOA technology (Gate Driver on Array) is the array substrate line drive technology. It uses the original array process of the liquid crystal display panel to manufacture the drive circuit of the horizontal scanning line on the substrate around the display area, so that it can replace the external integrated circuit board ( (Integrated Circuit, IC) to complete the driving of horizontal scanning lines. GOA technology can reduce the welding (bonding) process of external ICs, have the opportunity to increase p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/36
CPCG09G3/3677G09G2230/00G11C19/28G09G2300/0408G09G2310/0283G09G2310/0286G09G2310/08G09G3/20G09G3/3648G09G3/3688G09G3/3696G09G2330/021
Inventor 李亚锋
Owner WUHAN CHINA STAR OPTOELECTRONICS TECH CO LTD
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