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Shift register circuit

A shift register and circuit technology, applied in static memory, digital memory information, instruments, etc., can solve problems such as reducing the output driving capability of the pull-up transistor 191

Active Publication Date: 2011-05-11
AU OPTRONICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It can be seen from the above that the operation of the Nth stage shift register 112 will significantly reduce the output driving capability of the pull-up transistor 191 due to the threshold voltage of the input transistor 181

Method used

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Embodiment Construction

[0017] Hereinafter, according to the shift register circuit of the present invention, specific embodiments will be described in detail in conjunction with the accompanying drawings, but the provided embodiments are not intended to limit the scope of the present invention.

[0018] figure 2 It is a schematic diagram of the shift register circuit according to the first embodiment of the present invention. Such as figure 2 As shown, the shift register circuit 200 includes a plurality of stages of shift registers. For the convenience of illustration, the shift register circuit 200 only shows the (N-2)th stage shift register 211, (N-1) stage Shift register 212, Nth stage shift register 213, (N+1) stage shift register 214 and (N+2) stage shift register 215, wherein only N stage shift register 213 shows the internal functional unit structure, and the shift registers of other stages are similar to the shift register 213 of the Nth stage, and will not be repeated here. In the oper...

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Abstract

Provided is a shift register circuit, comprising a plurality of shift registers for providing a plurality of grid signals. The N-rank shift register of a rank shift register comprises an input unit, a pull-up unit and a pull-down unit. The input unit is used for outputting the N-rank control voltage based on the (N-1) grid signal generated by a (N-1) rank shift register and the (N-2) drive control voltage generated by a (n-2) rank shift register. The pull-up unit pulls up an N grid signal based on the N drive control voltage and a system frequency. The pull-down unit pulls down the N grid signal and the N drive control voltage based on a (n+2) grid signal generated by a (N+2) rank shift register.

Description

【Technical field】 [0001] The invention relates to a shift register circuit, in particular to a shift register circuit with high driving capability. 【Background technique】 [0002] A liquid crystal display (Liquid Crystal Display; LCD) is a flat panel display widely used at present, which has the advantages of light and thin appearance, power saving and no radiation. The working principle of the liquid crystal display device is to change the arrangement state of the liquid crystal molecules in the liquid crystal layer by changing the voltage difference between the two ends of the liquid crystal layer, so as to change the light transmittance of the liquid crystal layer, and cooperate with the light source provided by the backlight module to display images. Generally speaking, a liquid crystal display device includes a plurality of pixel units, a source driver and a shift register circuit. The source driver is used to provide multiple data signals to multiple pixel units. The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/20G09G3/36
CPCG09G3/3677G09G2310/0286G11C19/287
Inventor 杨欲忠陈勇志徐国华苏国彰
Owner AU OPTRONICS CORP
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