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Shift register and gate drive circuit

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

Active Publication Date: 2021-01-26
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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  • Shift register and gate drive circuit

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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 (Gate On Array, GOA) 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. It is mainly through exposur...

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Abstract

The present application relates to a shift register and a gate drive circuit. The shift register includes 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 the high-level signal, provides the high-level signal to the pull-down control node, responds to the voltage signal of the pull-down control node, provides the high-level signal to the pull-down node, and responds to the first switch signal, the second switch signal and the voltage signal of the pull-up node, and provide the low-level signal to the pull-down node and the pull-down control node respectively. The second pull-down control circuit responds to the first pull-down control signal and the second pull-down control signal, and provides the low-level signal to the pull-down node and the pull-down control node respectively, thereby reducing the time that the pull-down node is in the DC high-level working state, and reducing the The associated possibility of threshold voltage drift of thin film transistors improves the noise reduction effect.

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 Patents(China)
IPC IPC(8): G09G3/36G11C19/28
CPCG09G3/3696G09G2310/0286G11C19/28
Inventor 单剑锋
Owner HKC CORP LTD
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