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Gate driving circuit with low leakage current control mechanism

A gate drive circuit and leakage current technology, applied in the direction of instruments, static indicators, etc., can solve the problems that the gate signal cannot reach the voltage, reduce the image display quality, etc., and achieve the effect of ensuring image display quality and high image display quality

Active Publication Date: 2009-03-18
AU OPTRONICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the driving control voltage VQn is lowered, the gate signal SGn generated by the driving unit 120 may not be able to reach a high enough voltage to effectively drive the pixel unit 105 to perform the data signal writing operation, thereby reducing the image display quality

Method used

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  • Gate driving circuit with low leakage current control mechanism

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Embodiment Construction

[0048] In order to make the present invention more understandable, the gate drive circuit with low leakage current control mechanism according to the present invention will be described in detail below with reference to specific embodiments and accompanying drawings, but the provided embodiments are not intended to limit the scope of the present invention. range covered.

[0049] FIG. 2 is a functional block diagram of the gate driving circuit according to the first embodiment of the present invention. As shown in FIG. 2 , the gate drive circuit 200 includes a multi-stage shift register. For the convenience of illustration, the gate drive circuit 200 only shows the N-1th shift register 211, the N-th shift register 212 and the N+th shift register. Level 1 shift register 213, of which only the Nth level shift register 212 shows the internal functional unit architecture. The N-1st stage shift register 211 is used to provide the gate signal SGn-1 and the start pulse signal STn-1,...

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Abstract

The invention relates to a grid driving circuit with a low leakage current control mechanism, which is used to supply a plurality of grid signals which are respectively sent to a plurality of grid lines. The grid driving circuit comprises multi-level shift registers, wherein each level of the shift register comprises a driving unit, an energy storage unit, a buffer unit, a steady voltage unit and a control unit, the driving unit is used to generate grid signals according to driving control voltage and a first clock pulse, the buffer unit is used to receive a start pulse signal, and the energy storage unit executes a charging process according to the start pulse signal to supply the driving control voltage. The control unit is used to generate a control signal according to the first clock pulse and a second clock pulse which is reversed with the first clock pulse, and the steady voltage is used to adjust and control the driving control voltage according to the control signal. The grid driving circuit with a low leakage current control mechanism can effectively drive a pixel unit to execute write operation of a data signal, and guarantees high image display quality.

Description

technical field [0001] The invention relates to a gate drive circuit, in particular to a gate drive circuit with a low leakage current control mechanism. Background technique [0002] Liquid crystal display (Liquid Crystal Display; LCD) is a flat panel display widely used at present, which has the characteristics of light and thin appearance, power saving and no radiation. The working principle of the liquid crystal display device is to change the alignment 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 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 gate driving circuit and a source driving circuit. The source driving circuit is used for providing multiple data signals....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/36G09G3/20
Inventor 张立勋陈文彬许哲豪余秋美
Owner AU OPTRONICS CORP
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