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Shift register circuit

A technology of shift registers and circuits, which is applied to instruments, static indicators, etc., can solve problems such as difficult liquid crystal display devices, inability to drive the second voltage boost of control voltage, and inability of liquid crystal display devices to provide display quality, etc., to achieve enhanced signal The effect of transmission capacity

Inactive Publication Date: 2012-04-25
AU OPTRONICS CORP
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

However, in the conventional design of the above-mentioned shift register circuit, the element capacitive coupling effect of the drive transistor cannot be effectively used to perform the second voltage boost operation of the drive control voltage, that is, the drive control voltage is boosted after the second voltage boost. It is still unable to reach a high enough voltage to enable the drive unit to have high drive capability and high signal transmission capability, so the liquid crystal display device cannot provide high display quality
In addition, if the shift register circuit is integrated on the display panel including the pixel array in order to reduce the manufacturing cost of the liquid crystal display device, that is, the multi-stage shift register of the shift register circuit is based on the GOA (Gate-driver On Array) architecture. Cooperating with a plurality of gate lines and sequentially arranged in the relatively long and narrow frame area of ​​the display panel, the low signal transmission capability of the drive unit is difficult to make the liquid crystal display device have the advantages of low-temperature power-on and fast start-up

Method used

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Embodiment Construction

[0048] In the following, according to the shift register circuit of the present invention, specific embodiments will be described in detail with the accompanying drawings, but the provided embodiments are not intended to limit the scope of the present invention.

[0049] figure 1 It is a schematic diagram of the shift register circuit of the first embodiment of the present invention. Such as figure 1 As shown, the shift register circuit 100 includes a multi-stage shift register. For the convenience of illustration, the shift register circuit 100 only shows the (N-1)th stage shift register 101, the Nth stage shift register 102 and the (N+ 1) Stage shift register 103, in which only the Nth stage shift register 102 shows the internal functional unit architecture, and the rest of the stage shift registers are similar to the Nth stage shift register 102, and will not be described in detail. In the operation of the shift register circuit 100, the Nth stage shift register 102 is us...

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Abstract

The invention discloses a shift register circuit comprising multi-stage shift registers for providing a plurality of grid signals. Each stage shift register comprises an input unit, a voltage increasing unit, a unidirectional conducting unit, a driving unit and a pull-down unit, wherein the input unit outputs a front drive control voltage according to a first input signal, the voltage increasing unit increases the front drive control voltage as the increase of a system clock, the unidirectional conducting unit executes unidirectional conduction for the front drive control voltage to output drive control voltage, the driving unit outputs a grid signal based on the drive control voltage and the system clock, and the pull-down unit pulls down the corresponding grid signal, drive control voltage and the front drive control voltage according to a second input signal.

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, and has the advantages of light and thin appearance, power saving and low 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, thereby changing the light transmittance of the liquid crystal layer, and then 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. Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/20G09G3/36
Inventor 刘康义
Owner AU OPTRONICS CORP
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