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GOA circuit and liquid crystal display device

A circuit and control circuit technology, applied in static indicators, instruments, etc., can solve problems such as leakage, affecting the reliability performance of amorphous silicon GOA circuits, and gate signal drop, reducing the risk of leakage, realizing narrow frame design, The effect of increasing the size

Inactive Publication Date: 2018-11-02
SHENZHEN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] There is a gate signal drop (Gate Falling) during the potential maintenance stage of the node Q(n) of the n-level GOA unit, which causes leakage and affects the reliability of the amorphous silicon GOA circuit

Method used

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  • GOA circuit and liquid crystal display device
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  • GOA circuit and liquid crystal display device

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Embodiment Construction

[0017] The GOA circuit and liquid crystal display device provided by the present invention will be described in detail below in conjunction with the accompanying drawings. Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0018] refer to image 3 , a schematic diagram of an embodiment of the GOA circuit described in the present invention. The GOA circuit includes: a plurality of cascaded GOA units, wherein the nth level of GOA units controls the charging of the nth level of horizontal scanning lines. The nth level GOA unit includes a pull-up control circuit, a pull-up circuit, a pull-down circuit, a pull-down maintenance circuit, and a bootstrap capacitor Cb; the pull-up control circuit is connected...

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Abstract

The invention provides a GOA circuit and a liquid crystal display device. A thin film transistor connected in a diode mode is added to a pull-up control circuit on the basis of a conventional GOA circuit, and a reverse signal with the phase, opposite to the signal connected to the pull-up control circuit, is connected, thereby enabling a drain electrode of a first thin film transistor of the pull-up control circuit to be connected with a high-potential DC signal. Therefore, there is no need of a new DC signal line. Accordingly, the GOA circuit achieves a purpose that the drain electrode of thefirst thin film transistor is connected with the high-potential DC signal through a conventional signal under the condition that a fan-out space of the GOA circuit is not increased, and can greatly reduce the electric leakage risk of an n-th-stage GOA unit node Q(n) at a potential maintaining stage, thereby improving the reliability of the GOA circuit, enabling the size of a frame not to be increased, and facilitating the implementation of the narrow-frame design of a display panel.

Description

technical field [0001] The invention relates to the technical field of liquid crystal display, in particular to a GOA circuit and a liquid crystal display device capable of improving the reliability performance (Releability) of an amorphous silicon (a-Si) GOA circuit. Background technique [0002] With the development of optoelectronic and semiconductor technologies, liquid crystal displays (Liquid Crystal Display, LCD) are also developing vigorously. Among many liquid crystal displays, a thin film transistor liquid crystal display (Thin Film Transistor Liquid Crystal Display, TFT-LCD) has superior characteristics such as high space utilization efficiency, low power consumption, no radiation, and low electromagnetic interference. The Gate Driver on Array (GOA) technology is to use the existing TFT-LCD array process to manufacture the gate driver circuit on the array (Array) substrate to realize the drive method of progressively scanning the gate. technology. GOA technology...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/36
CPCG09G3/3674
Inventor 朱静
Owner SHENZHEN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD
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