Touch screen

A touch screen and polarizer technology, applied in optics, instruments, electrical and digital data processing, etc., can solve problems affecting electrostatic discharge, glue breakage, glue fineness, etc., to improve electrostatic discharge capacity, reduce process difficulty, and increase contact area effect

Inactive Publication Date: 2020-06-05
NANJING CEC PANDA FPD TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the contact between the coated silver paste and the edge of the polarizer in this way depends on the high uniformity and accuracy of the linearization of the silver paste coating, otherwise it will cause defects such as too thin glue, glue breakage, etc., which will affect electrostatic discharge, and further Affect the performance and display effect of the product

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Such as Figures 2a to 2b As shown, change the cutting shape of the edge of the polarizer in contact with the silver paste, and change the shape and outline of the lower edge of the polarizer from a vertically cut straight line to a vertically cut folded line, as shown in Figure 2a with 2b shown. Depend on Figure 2b It can be seen that the present invention increases the contact area between the silver paste and the cross-section pressure-sensitive adhesive of the polarizer, and improves the electrostatic discharge capacity. Compared with the prior art, greater silver paste coating deviation (position deviation, glue width deviation) can be allowed. Specifically, for the conventional method, the coating tolerance for better contact of the edge polarizer edge on the silver paste coating is very limited; for the present invention, from Figure 2b It can be seen that the coating tolerance can be effectively increased.

Embodiment 2

[0034] Such as Figures 3a to 3c As shown, changing the cutting shape of the edge of the polarizer in contact with the silver paste, and changing the shape of the lower edge of the polarizer from a vertically cut straight line to a vertically cut square wave, trapezoidal, and wavy shape can also achieve increased The contact area between the silver paste and the pressure-sensitive adhesive on the cross-section of the polarizer can improve the effect of electrostatic discharge ability; at the same time, it can also allow greater silver paste coating deviation (position deviation, glue width deviation).

Embodiment 3

[0036] Such as Figures 3a to 3b As shown, change the cutting method of the edge of the polarizer in contact with the silver paste, and change the shape and outline of the lower edge of the polarizer from a vertically cut straight line to a non-perpendicular cut (inclined at a certain angle, 0-90°) straight line, Figure 3a The shape profile of the lower edge of the polarizer shown is a straight line cut vertically, Figure 3b The shape profile of the lower edge of the polarizer shown is a straight line cut non-perpendicularly (inclined at a certain angle, 0-90°), which can also increase the contact area between the silver paste and the pressure-sensitive adhesive on the cross-section of the polarizer, and improve the electrostatic discharge. The effect of ability, at the same time, can also allow greater silver paste coating deviation (position deviation, glue width deviation).

[0037] Preferably, improvements are made on the basis of the above scheme to obtain a preferred...

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PUM

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Abstract

The invention discloses a touch screen which comprises a liquid crystal display panel, a flexible circuit board, a polarizer assembly arranged on the upper surface of the color filter of the liquid crystal display panel body and a conductive silver adhesive. The polarizer assembly comprises a pressure-sensitive adhesive attached to the upper surface of the color filter and a polarizer attached tothe upper surface of the pressure-sensitive adhesive. The conductive silver adhesive is electrically connected with a corresponding electrode frame on a thin film transistor of the liquid crystal panel, and the end, away from the polarizer, of the thin film transistor is electrically connected with the flexible circuit board; the conductive silver adhesive extends in the width direction of the liquid crystal panel in the mode of being attached to the lower edge of the polarizer and makes contact with the section of the lower edge of the polarizer. The cross section of the lower edge of the polarizer is one of a vertically-cut non-linear shape, a non-vertically-cut linear shape and a non-vertically-cut non-linear shape. The contact area of the silver paste and the polarizer section pressure-sensitive adhesive is increased, and the electrostatic discharge capacity is improved.

Description

technical field [0001] The invention relates to the field of liquid crystal displays, in particular to a touch screen. Background technique [0002] In the current incell products, it is widely used to add antistatic particles to the pressure-sensitive adhesive of the polarizer on the CF side of the color filter substrate (compared to the conventional polarizer, this polarizer is a low-resistance polarizer with an impedance of 10^8~ 10^10Ω / □). Through one or two pad points on the TFT step, apply a silver paste to the cross section of the low-resistance polarizer to discharge static electricity. However, the contact between the coated silver paste and the edge of the polarizer in this way depends on the high uniformity and accuracy of the linearization of the silver paste coating, otherwise it will cause defects such as too thin glue, glue breakage, etc., which will affect electrostatic discharge, and further Affect the performance and display effect of the product. Conte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/1335G02F1/1333G06F3/041
CPCG02F1/133528G02F1/1333G06F3/0412
Inventor 杨金玲黄威舒强史碧玉许家诚王志军
Owner NANJING CEC PANDA FPD TECH CO LTD
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