Static electricity protection circuit, display panel and display device

Abstract

The invention discloses a static electricity protection circuit, a display panel and a display device. When the amount of static electricity on a signal line on the display panel reaches a certain degree, the static electricity can be timely released through a second signal end of the static electricity protection circuit, so that a static electricity damage to the panel is avoided; when the display panel needs to be subjected to Cell Test, a required signal for the test is input into a first signal end by the second signal end through controlling a test control signal end, so that the function of the Cell Test can be achieved. Compared with an existing display panel in which the static electricity protection circuit is designed and a Shorting bar is also designed, the display panel disclosed by the invention has the advantages that the functions of static electricity protection and Cell Test can be achieved only by one circuit, so that the wiring space can be reduced; and the step of removing a Shorting bar region in the prior art is also omitted.

Description

technical field [0001] The invention relates to the field of display technology, in particular to an electrostatic protection circuit, a display panel and a display device. Background technique [0002] The preparation of the display panel includes an array substrate process, a color filter substrate process, and a cell alignment process between the array substrate and the color filter substrate. Generally, a panel function test (CellTest) is performed during the Cell process. The defective products in the three processes of Array, CF and Cell are detected by CellTest, and the defective products are removed. At present, the commonly used method of CellTest is to set Shortingbar in the peripheral area of ​​the display panel, and connect all the scanning lines and signal lines in the display area of ​​the display panel to the Shortingbar respectively, and then conduct R / G / B / W picture testing through the Shortingbar. Once the test is completed, the area where the Shortingbar i...

AI Technical Summary

Problems solved by technology

[0003] Therefore, in the existing display panel design, the electrostatic protection circuit and the CellTest circuit occupy a large wiring space, making the display area of ​​the panel relatively smaller

Moreover, in the prior art, in order to cut off the area where the Shortingbar is set in the display panel, special laser cutting equipment needs to be equipped, and the production cost is relatively high.

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