GOA circuit and LCD device

A circuit and level signal technology, applied in the field of liquid crystal display, can solve the problems of uneconomical space and achieve the effect of reducing the layout space and the number of TFTs

Active Publication Date: 2017-11-07
SHENZHEN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the main component of the pull-down maintenance unit is the inverter 100, and the most commonly used one at present is figure 1 The Darlington structure, but the Darlington structure requires more TFTs, and the space is not economical

Method used

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  • GOA circuit and LCD device
  • GOA circuit and LCD device
  • GOA circuit and LCD device

Examples

Experimental program
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Effect test

Embodiment Construction

[0031] see image 3 , which is a schematic structural diagram of a preferred embodiment of the GOA circuit of the present invention. The GOA circuit of the present invention includes a plurality of cascaded GOA units, wherein the Nth level GOA unit controls the charging of the Nth level horizontal scanning line, such as image 3 As shown, the Nth level GOA unit includes a pull-up control unit, a pull-up unit, a pull-down unit, a pull-down sustain unit, and a bootstrap capacitor Cb; the pull-up unit, the pull-down sustain unit and the bootstrap capacitor Cb are respectively connected to the node Q(N ) is connected to the gate signal output terminal G(N), and the pull-up control unit and the pull-down unit are respectively connected to the node Q(N).

[0032] The pull-down sustaining unit includes: a thin film transistor T61, whose gate inputs a low-frequency clock signal LC2, and whose source and drain are respectively connected to node P(N) and the input low-frequency clock s...

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PUM

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Abstract

The invention relates to a GOA circuit and a LCD device; the GOA circuit comprises a plurality of cascaded GOA units; the Nth GOA unit comprises a pull up control unit, a pull up unit, a pull down unit, a pull down maintaining unit, and a bootstrap capacitor (Cb); the pull up unit, the pull down maintaining unit and the bootstrap capacitor (Cb) are respectively connected with a first node (Q (N)) and a grid electrode signal output end (G(N)) of the Nth GOA unit; the pull up control unit and the pull down unit are respectively connected with the first node (Q (N)) of the Nth GOA unit; the pull down maintaining unit comprises a first film transistor (T61), a second film transistor (T62), a third film transistor (T64), a fourth film transistor (T43), and a fifth film transistor (T33). The invention also provides the corresponding LCD device; the GOA circuit and the LCD device can reduce the TFT quantity, can reduce the layout space, thus benefiting GOA product narrow frame designs.

Description

technical field [0001] The invention relates to the field of liquid crystal displays, in particular to a GOA circuit and a liquid crystal display device. Background technique [0002] Liquid crystal display (Liquid Crystal Display, LCD) and other flat display devices are widely used in mobile phones, televisions, personal digital assistants, digital cameras, notebooks, etc. Various consumer electronic products such as computers and desktop computers have become the mainstream of display devices. [0003] In an active liquid crystal display, each sub-pixel has a thin film transistor (TFT), its gate (Gate) is connected to the horizontal scanning line, the drain (Drain) is connected to the vertical data line, and the source (Source) is connected to the pixel electrodes. Applying sufficient voltage on the horizontal scanning line will turn on all the TFTs on the horizontal scanning line. At this time, the pixel electrodes on the horizontal scanning line will be connected with ...

Claims

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Application Information

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IPC IPC(8): G09G3/36
CPCG09G3/3677
Inventor 吕晓文陈书志
Owner SHENZHEN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD
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