GOA circuit and liquid crystal display device

A technology of circuits and sub-circuits, applied in the field of liquid crystal displays, can solve problems such as the inability to maintain the voltage at the Q point of the GOA circuit and affect the driving performance of the GOA circuit, and achieve the effects of improving service life, enhancing reliability, and improving stability

Inactive Publication Date: 2017-09-08
TCL CHINA STAR OPTOELECTRONICS TECH CO LTD
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0007] The invention provides a GOA circuit and a liquid crystal display device, which are used to solve the technical problem that the Q-point voltage of the GOA circuit in the prior art cannot be maintained, thereby affecting the driving performance of the GOA circuit

Method used

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

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Embodiment Construction

[0050] The present invention will be further described below in conjunction with accompanying drawing.

[0051] image 3 The structural diagram of the GOA sub-circuit provided for the embodiment of the present invention, such as image 3 As shown, the embodiment of the present invention provides a GOA circuit, including a plurality of cascaded GOA sub-circuits, and each GOA sub-circuit includes a pull-up control unit 1, a pull-up unit 2, a download unit 3, a pull-down unit 4, a pull-down Sustaining unit 5 and bootstrapping unit 6 .

[0052] Generally, the GOA circuit includes a start signal STV, a first low-frequency clock signal LC1 , a second low-frequency clock signal LC2 , a DC low voltage VSS, and four high-frequency clock signals CK1 - CK4 . The start signal is used to start the T11 of the first two stages of GOA, and pull down the last two stages of T31 and T41. The low-frequency signals LC1 and LC2 alternately perform the pull-down maintenance of the GOA circuit. The...

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Abstract

The invention provides a GOA circuit and a liquid crystal display device. The GOA circuit includes a plurality of GOA sub circuits in cascaded connection. Each GOA sub circuit includes a pull-up control unit, a pull-up unit, a download unit, a pull-down unit, a pull-down maintaining unit and a bootstrap unit. The pull-down unit includes a first thin film transistor, a second thin film transistor and a third thin film transistor. In each pull-down unit, serial connection of the first thin film transistor and the second thin film transistor is adopted for connection. In this way, leakage current at a Q point in the GOA circuit is reduced. Also, voltage across the first thin film transistor or the second thin film transistor is reduced due to the serial connection of the first thin film transistor and the second thin film transistor, so that the deterioration speed of the first thin film transistor or the second thin film transistor is slowed in some degree and the service life time of the first thin film transistor or the second thin film transistor is prolonged. Therefore, the stability of the GOA circuit in a severe environment is improved and the reliability of a liquid crystal panel is enhanced.

Description

technical field [0001] The invention relates to the technical field of liquid crystal displays, in particular to a GOA circuit and a liquid crystal display device. Background technique [0002] Liquid crystal display has become a display terminal in mobile communication equipment, computers, televisions, etc. due to its high display quality, low price, and easy portability. At present, the panel driving technology of TV liquid crystal display commonly used tends to adopt the Gate Driver on Array (GOA) technology, which utilizes the original manufacturing process of the flat panel display panel to manufacture the driving circuit of the horizontal scanning line of the panel on the On the substrate around the display area, GOA technology can simplify the manufacturing process of flat-panel display panels and eliminate the bonding process in the direction of horizontal scanning lines, which can increase production capacity and reduce product costs. At the same time, it can impro...

Claims

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Application Information

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IPC IPC(8): G09G3/36
CPCG09G3/3677G09G2310/0264G09G2300/0408G09G2310/0267G09G2310/0286G09G2310/08G09G3/3655G09G3/3688G09G3/3696
Inventor 李文英
Owner TCL CHINA STAR OPTOELECTRONICS TECH CO LTD
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