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Electrostatic discharge protection circuit, display panel and display device

A protection circuit and electrostatic discharge technology, which is applied to emergency protection circuit devices, emergency protection circuit devices for limiting overcurrent/overvoltage, circuit devices, etc., can solve problems such as low anti-static ability and impact on display quality of display devices , to achieve the effect of improving anti-static ability, avoiding burning of TFT components, and increasing speed

Active Publication Date: 2013-08-28
XIAMEN TIANMA MICRO ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Embodiments of the present invention provide an electrostatic discharge protection circuit and a display panel and a display device having the electrostatic discharge protection circuit, which are used to solve the problems of the existing ESD protection circuit, such as low anti-static capability and poor display quality of liquid crystal display devices. issues such as impact

Method used

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  • Electrostatic discharge protection circuit, display panel and display device
  • Electrostatic discharge protection circuit, display panel and display device

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Embodiment Construction

[0034] The electrostatic protection element of the electrostatic discharge protection circuit in the embodiment of the present invention increases the discharge path of static electricity and improves the performance of static electricity discharge through the bottom-gate TFT and top-gate TFT that are connected in parallel and share the active layer, source, and drain. Speed, improve the anti-static ability of the ESD protection circuit.

[0035] Generally, the structure composed of the bottom-gate TFT and the top-gate TFT connected in parallel and sharing the active layer and the source and drain can be called a double-gate TFT.

[0036] The embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0037] see figure 1 As shown, the first electrostatic discharge protection circuit provided by the embodiment of the present invention is located in the non-display area of ​​the display panel and includes at le...

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Abstract

The invention relates to the field of display devices, in particular to an electrostatic discharge protection circuit, a display panel and a display device. According to the embodiment of the invention, the electrostatic discharge protection circuit comprises at least one electrostatic protection element, and the electrostatic protection element comprises a bottom gate electrode, a first insulating layer, an active layer, a second insulating layer, top gate electrodes, a third insulating layer, a first electrode and a second electrode, wherein the bottom gate electrode is positioned on a substrate; the first insulating layer is positioned on the bottom gate electrode; the active layer is positioned on the first insulating layer, and corresponds to the bottom gate electrode; the second insulating layer is positioned on the active layer; the top gate electrodes are positioned on the second insulating layer, and correspond to the active layer; the third insulating layer is positioned on the top gate electrodes; the first and second electrodes are positioned on the two sides of the top gate electrodes on the third insulating layer respectively; the bottom gate electrode and the top gate electrodes are electrically connected with the first electrode and connected with a power cord or a circuit of a display area of the display panel; and the second electrode is electrically connected with the circuit of the display area or the power cord. According to the electrostatic discharge protection circuit, an electrostatic discharge path is added, so that the anti-electrostatic capability is improved.

Description

technical field [0001] The invention relates to the field of liquid crystal display devices, in particular to an electrostatic discharge protection circuit, a display panel and a display device with the electrostatic discharge protection circuit. Background technique [0002] Liquid Crystal Display (LCD) has the characteristics of low power consumption, low radiation and low manufacturing cost, and has been widely used in various electronic devices, such as digital electronic devices such as display devices, TVs, mobile phones, and digital cameras. Among them, a low temperature polysilicon liquid crystal display device (LTPS LCD, Low Temperature Poly Silicon Liquid Crystal Display) is a mainstream product in the liquid crystal display device. [0003] The display panel in the liquid crystal display device includes: a TFT array substrate, a color filter (Color Filter, CF) substrate, and a liquid crystal located between the TFT array substrate and the CF substrate, wherein the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L27/02H02H9/04
Inventor 吴昊夏军
Owner XIAMEN TIANMA MICRO ELECTRONICS
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