A shift register and a gate drive circuit

A shift register and gate technology, applied in static memory, digital memory information, instruments, etc., can solve the problems of thin-film transistor threshold voltage drift, affecting noise reduction effect, etc.

Active Publication Date: 2019-06-07
HKC CORP LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The gate drive circuit with the above structure is installed on the LCD panel. In the current gate drive circuit design, the potential of the output terminal of the non-output line is generally pulled down by setting the pull-down node. However, if the pull-down node is in the DC high-level working state for a long time , may cause the threshold voltage of the relevant thin film transistor to drift, affecting the noise reduction effect

Method used

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Embodiment Construction

[0069] In order to make the above-mentioned purpose, features and advantages of the present application more obvious and understandable, the specific implementation manners of the present application will be described in detail below in conjunction with the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the application. However, the present application can be implemented in many other ways different from those described here, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific implementation disclosed below.

[0070] See figure 1 , the shift register is an important technology in panel design. The main advantage is that it can replace the gate driver IC (Gate driver IC) and reduce production costs. pole signal.

[0071] See figure 2 and imag...

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Abstract

The invention relates to a shift register and a gate drive circuit. The shift register comprises a pull-up circuit, an output circuit, a pull-down circuit, a first pull-down control circuit and a second pull-down control circuit. The first pull-down control circuit responds to a high-level signalto provide a high-level signal to the pull-down control node, responds to a voltage signal of the pull-down control node to provide the high-level signal to the pull-down node, and responds to a first switch signal, a second switch signal and a voltage signal of the pull-up node, to provide a low-levelsignal to the pull-down node and the pull-down control node. The second pull-down control circuit responds to the first pull-down control signal and the second pull-down control signal; The low-levelsignal is provided for the high-level signal input end, so that the time of the high-level signal input end in a direct-current high-level working state is shortened, the time of the pull-down node in the direct-current high-level working state is shortened, the probability of drifting of the threshold voltage of the related thin film transistor is reduced, and the noise reduction effect is improved.

Description

technical field [0001] The present application relates to the display field, in particular to a shift register and a gate drive circuit. Background technique [0002] The Thin Film Transistor Liquid Crystal Display (TFT-LCD) driver mainly includes a gate drive circuit and a data drive circuit, wherein the gate drive circuit converts the input clock signal through a shift register and then adds it to the liquid crystal On the gate line of the display panel, the gate driving circuit can be formed in the same process as the TFT and be formed on the LCD panel together with the TFT at the same time. The gate drive circuit includes a multi-stage shift register, and each stage of the shift register is connected to a corresponding gate line to output a gate drive signal. The stages of the gate drive circuit are connected to each other, the start signal is input to the first stage of each stage and the gate drive signal is sequentially output to the gate line, wherein the input term...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/36G11C19/28
Inventor 单剑锋
Owner HKC CORP LTD
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