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Shift register, gate drive circuit, display panel and control method

A technology for shift registers and drive sub-circuits, applied in gate drive circuits, self-control of display panels, and shift registers, which can solve problems such as TFT failure, leakage current reduction, and hot carrier effects

Pending Publication Date: 2021-04-09
BOE TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For IGZO TFT, excessive Vds voltage can easily cause hot carrier effect, resulting in reduced leakage current and TFT failure

Method used

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  • Shift register, gate drive circuit, display panel and control method
  • Shift register, gate drive circuit, display panel and control method
  • Shift register, gate drive circuit, display panel and control method

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Embodiment Construction

[0090] In order to illustrate the present invention more clearly, the present invention will be further described below in conjunction with preferred embodiments and accompanying drawings. Similar parts in the figures are denoted by the same reference numerals. Those skilled in the art should understand that the content specifically described below is illustrative rather than restrictive, and should not limit the protection scope of the present invention.

[0091] The transistors used in the embodiments of the present invention can be thin film transistors or field effect transistors or devices with the same characteristics. Since the source and drain of the transistors used are symmetrical, there is no difference between the source and drain. In the embodiment of the present invention, in order to distinguish the source and drain of the transistor, one of them is called the first pole, the other is called the second pole, and the gate is called the control pole. In addition,...

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Abstract

The invention discloses a shift register, a gate drive circuit, a display panel and a control method. The shift register comprises an input sub-circuit, a pull-down node driving sub-circuit, an output sub-circuit, a noise reduction sub-circuit and a first reset sub-circuit, the pull-down node driving sub-circuit comprises a first access unit, a first voltage reduction unit and a second access unit, and the pull-down node driving sub-circuit is configured as follows: under the control of a first voltage signal end and a pull-up node, a first voltage signal provided by a first voltage signal end is transmitted to a first pull-down node through a first access unit, and the voltage applied to a second access unit is reduced through a first voltage reduction unit; and under the control of the pull-up node, a second voltage signal provided by the second voltage signal end is transmitted to the first pull-down node through the second access unit. According to the shift register provided by the invention, the voltage reduction unit is arranged to reduce the voltage on the second access unit, so that the stability of the shift register circuit is improved, and the stability of the GOA circuit is further improved.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a shift register, a gate drive circuit, and a self-control method of a display panel. Background technique [0002] With the further improvement of display requirements, Oxide TFT technology is gradually replacing a-Si TFT LCD due to its advantages of high mobility. However, compared with a-Si LCD, Oxide LCD has poorer stability and yield rate, and major panel manufacturers are continuing to optimize. Among them, large-scale products such as 8K 120Hz Oxide have higher requirements for driving voltage. [0003] For example, high-end TV products all use the Gatedriver On Array (GOA) drive method to achieve narrow and variable width display while reducing costs. In order to reduce the gate signal attenuation and delay caused by large size and high resolution, higher The driving voltage is generally above 30V for high level of GOA, and below -10V for low level. For large-size 8k 1...

Claims

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Application Information

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IPC IPC(8): G11C19/28G09G3/36
CPCG11C19/28G09G3/3677G09G2310/0286G09G2310/08G09G2310/061G09G3/2092
Inventor 董水浪徐姗姗袁广才曹占锋宁策王利忠薛大鹏姚念琦
Owner BOE TECH GRP CO LTD
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