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Test pad static releasing device and LCD

An electrostatic discharge device and test point technology, applied in the direction of instruments, nonlinear optics, optics, etc., to improve product quality and yield, reduce impact, and avoid bad products

Inactive Publication Date: 2017-02-22
WUHAN CHINA STAR OPTOELECTRONICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the deficiencies in the prior art, the purpose of the present invention is to provide a static discharge device and a liquid crystal display for testing solder joints, change the static discharge device used for static discharge at the test point, improve the quality of the product, and reduce the static discharge caused by static discharge. defective products

Method used

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  • Test pad static releasing device and LCD
  • Test pad static releasing device and LCD
  • Test pad static releasing device and LCD

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Embodiment Construction

[0019] The present invention will be further described in detail below with reference to the drawings and embodiments.

[0020] Such as figure 1 with figure 2 As shown, in the traditional LTPS process design, the structure of the non-porous test point (pad) 3 on the periphery (referring to the non-display area of ​​the liquid crystal panel) is as follows: the non-porous test point 3 is connected in series with one end for electrostatic discharge Large resistance, electrostatic impedance (ESD) 2 is connected to the first line 1 facing the driving circuit (driving the liquid crystal panel). The specific resistance of the electrostatic impedance 2 is 50-5000 ohms, and the non-porous test point 3 passes through the second Line 4 is connected to a flexible circuit board (FPC) or an integrated circuit (IC). If the electrostatic resistor 1 is damaged by electrostatic discharge, the subsequent FPC / IC signal cannot be input, causing the product to be abnormal. The electrostatic discharge ...

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Abstract

The invention discloses a test pad static releasing device comprising a nonporous test point; one end of the nonporous test point is connected in series with a static impedor and then connected with a first line facing a drive circuit, and the other end of the nonporous test point is connected with a second line connecting with a FPC or IC circuit; the second line is also connected with a virtual pattern used for static releasing; the invention also provides a LCD comprising the test pad static releasing device; compared with the prior art, the second line connected with the FPC or IC circuit is designed with the virtual pattern connecting with the second line, and the virtual pattern is used for static releasing; when static releasing is happening, the FPC or IC signal can be also normally inputted into a display zone, thus preventing product adverse, improving product quality and yield rate, and preventing static release explosion from affecting products.

Description

Technical field [0001] The invention relates to the technical field of liquid crystal display, in particular to an electrostatic discharge device and a liquid crystal display used for testing solder joints in the LTPS process. Background technique [0002] In the current LTPS process design plan, the peripheral test pad design will connect a large resistor in series as an electrostatic resistor for electrostatic discharge (ESD) protection, and then flow to the flexible circuit board ( FPC) will give the test point (Pad) high-potential or low-potential signal for picture control, but in the production process, the substrate static electricity accumulation is too high, static electricity strikes, and the product is abnormal. Summary of the invention [0003] In order to overcome the shortcomings of the prior art, the purpose of the present invention is to provide an electrostatic discharge device and a liquid crystal display for testing solder joints, change the electrostatic discha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/1345
CPCG02F1/1345G02F2202/22
Inventor 张占东
Owner WUHAN CHINA STAR OPTOELECTRONICS TECH CO LTD
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