Electrostatic discharge protection device for liquid crystal display and manufacturing method thereof

Abstract

The invention relates to an electrostatic discharge protection device for a liquid crystal display and a manufacturing method thereof. The liquid crystal display has a plurality of data lines and scanning lines intersecting each other, wherein a line parallel to each other is arranged around the display area of ​​the liquid crystal display A common electrode line and a repair line, a discharge tip located between the common electrode line and the repair line and connected to each data line, a transistor protection ring is arranged on one side of the common electrode line, and the transistor protection ring is adjacent to it The data lines and common electrode lines are connected. The electrostatic discharge protection device and the manufacturing method thereof of the present invention have the ability to discharge static electricity so as to protect the transistors in the display area of ​​the liquid crystal display from being damaged by static electricity.

Description

technical field [0001] The invention relates to an electrostatic discharge protection device of a liquid crystal display and a manufacturing method thereof, in particular to an electrostatic discharge protection device capable of discharging static electricity and a manufacturing method thereof. Background technique [0002] Traditional CRT monitors rely on cathode ray tubes to emit electrons and strike phosphors on the screen to display images, but liquid crystal displays work on a completely different principle. Generally, a liquid crystal display (LCD) has a (also called a color filter substrate) and a lower substrate (also called an array substrate), which have a certain distance from each other and are facing each other. A plurality of electrodes formed on the two substrates are facing each other. Between the upper substrate and the lower substrate, a voltage is applied to the liquid crystal through the electrodes on the substrate, and then the alignment of the liquid c...

AI Technical Summary

Problems solved by technology

Through the electrostatic protection transistor, as described in Japanese Patent Application Laid-Open No. Hei 05-088198, a protection transistor T1 is arranged at the intersection of the scanning line 101 and the data line 102 and opposite to the transistor T. It can be ignored, but when there is static electricity and it is turned on when it reaches the turn-on value, the electrostatic charge is shared or discharged through other conductive channels. In addition, the above-mentioned weak current can alleviate the damage caused by the accumulation of static electricity to a certain extent. So as to achieve the purpose of electrostatic protection; but the above-mentioned protection transistor also has shortcomings. According to the current manufacturing process, the protection transistor does not really work until the uppermost pixel electrode layer is completed, but it is still in an electrostatic non-protection state before, and at this time The transistors on the array substrate have been completed

If it is affected by static electricity before it is protected by static electricity, it will easily lead to transistor failure, wire short circuit, open circuit and other problems, which will reduce the yield of production

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