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GOA circuit and LCD device for LCD

A liquid crystal display and circuit technology, applied to circuits, electrical components, static indicators, etc., can solve problems such as large size, and achieve the effect of solving volatility problems

Active Publication Date: 2014-07-16
TCL CHINA STAR OPTOELECTRONICS TECH CO LTD
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  • Abstract
  • Description
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Problems solved by technology

Then, in order to make up for the insufficient potential of Q(N) in the first stage, it is also necessary to design the three TFTs T52, T62, and T55 to be relatively large in size. The problem caused by this is that Q(N) is inactive during The ripple current (Ripple) is relatively high, so the high potential fluctuations of S(N) and T(N), P(N) and K(N) during the non-action period are relatively large

Method used

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

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Embodiment Construction

[0088] Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

[0089] Such as image 3 Shown is a schematic circuit diagram of the first embodiment of the GOA circuit for liquid crystal display provided by the present invention. In this embodiment, the GOA circuit includes a plurality of cascaded GOA units, and charges the Nth level horizontal scan line G(N) in the display area according to the control of the Nth level GOA unit, and the Nth level GOA unit includes a pull-up circuit 200, pull-down circuit 400, first pull-down maintenance circuit 600, second pull-down maintenance circuit 700, bridge circuit 800, pull-up control circuit 100, downlink circuit 300 and bootstrap capacitor Cb; wherein, pull-up circuit 200, pull-down circuit 400. The first pull-down sustaining circuit 600, the second pull-down sustaining circuit 700, and the bootstrap capacitor Cb are respectively connected to the gate signal point Q(N) an...

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Abstract

The embodiment of the invention discloses a GOA circuit for LCD. The GOA circuit comprises a plurality of cascaded GOA units. According to the nth-level GOA unit control, the nth-level horizontal scanning line of a display area is charged. The nth-level GOA unit comprises a pull-up circuit, a pull-down circuit, a first pull-down holding circuit, a second pull-down holding circuit, a bridge circuit, a pull-up control circuit, a downlink circuit and a bootstrap capacitor, wherein a third TFT in the pull-down holding circuit is connected with a seventh TFT in parallel; a tenth TFT in the second pull-down holding circuit is connected with a fourteenth TFT in parallel; the seventh TFT and the grid electrode of the fourteenth TFT are connected to each other and respectively connected with a start signal from the (n-1)-level GOA unit or the (n-1)-level horizontal scanning line. The embodiment of the invention further discloses an LCD device. By the implementation of the GOA circuit and the LCD device, an output delay of a grid signal can be shortened.

Description

technical field [0001] The present invention relates to the technical field of liquid crystal display, in particular to a GOA (Gate Driver on Array, array substrate row scanning driving) circuit and a liquid crystal display device for liquid crystal display. Background technique [0002] In an active liquid crystal display, each 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 to the pixel electrode. Applying sufficient voltage on the horizontal scanning line will turn on all the TFTs on the line, and at this time the horizontal scanning line will be connected to the data line in the vertical direction, so that the display signal voltage on the data line will be written into the pixel, and the control The light transmittance of different liquid crystals can achieve the effect of controlling the color. [0003] At present, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/36
CPCG11C19/28G11C19/184G09G3/3674G09G2310/0267G09G2310/0286G09G2320/0223G09G3/3648G09G2300/0809G09G2310/0251G09G2310/06G09G2310/08G09G2320/0204H01L27/124
Inventor 戴超肖军城
Owner TCL CHINA STAR OPTOELECTRONICS TECH CO LTD
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