Liquid crystal device and improvement for tensile strength of liquid crystal screen with circuit board

A liquid crystal display, liquid crystal display technology, applied in static indicators, instruments, nonlinear optics, etc., can solve problems such as abnormal display, reduce product reliability and yield, and liquid crystal display products do not display, and improve quality. and reliability, tensile strength improvement, and the effect of reducing poor connection

Inactive Publication Date: 2008-07-23
深圳市合力泰光电有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] like figure 2 As shown, the substrate film 8 (i.e. polyimide material protective film) on the existing flexible printed circuit board 2 is connected to the copper foil 6 through the connecting agent 7, and the flexible golden finger 4 is plated on the surface of the copper foil. At present, generally The flexible printed circuit board (FPC for short) material of the liquid crystal display device is directly hot-pressed on the liquid crystal with anisotropic conductive film (ACF) with copper foil or rolled copper, electrolytic copper, and high-ductility electrolytic copper. On the display device, after the coating of silica gel is completed, the tensile strength (tension) is about 500~700g / cm, and after a period of time, the tensile strength (tension) of FPC> 400~600g / cm, and it is easy to make FPC ( The flexible gold finger of the hot-pressed part of the flexible printed circuit board) material is poorly connected, resulting in phenomena such as non-display and abnormal display of liquid crystal display products, which seriously affect the quality of liquid crystal display device products and reduce product reliability and yield rate

Method used

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  • Liquid crystal device and improvement for tensile strength of liquid crystal screen with circuit board
  • Liquid crystal device and improvement for tensile strength of liquid crystal screen with circuit board
  • Liquid crystal device and improvement for tensile strength of liquid crystal screen with circuit board

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Experimental program
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Effect test

Embodiment 1

[0011] Embodiment one: if figure 1 with image 3 As shown, a liquid crystal display device includes a liquid crystal display 1, a flexible printed circuit board 2 and an IC drive circuit 3, an anisotropic conductive film 9 (ACF for short) is attached to the electrode of the liquid crystal display 1, and the flexible printed circuit The flexible gold finger 4 on the board 2 and the polyimide protective film 8 (PI protective film for short) located on the flexible gold finger 4 (see image 3 ) is hot-pressed on the electrodes of the liquid crystal display 1, wherein the length of the flexible gold finger 4 on the flexible printed circuit board 2 is selected to be between 0.1 and 1.0 mm, and the polyimide protective film 8 is hot-pressed on the liquid crystal display The width dimension on 1 is between 0.1 and 1.0mm.

[0012] Adopt above-mentioned embodiment, the tensile strength of FPC material can reach more than 800~1000g / cm; The flexible golden finger that has PI protectiv...

Embodiment 2

[0014] Embodiment two: if Figure 1 to Figure 3 As shown, a method for improving the tensile strength of a liquid crystal display with a flexible printed circuit board: comprises the following steps: 1) ACF material (anisotropic conductive film) is attached on the electrode of the liquid crystal display 1, 2 ) The flexible gold finger 4 on the FPC material is selected from a length dimension range of 0.1 to 1.0 mm, and the PI protective film with a width of 0.1 to 1.0 mm on the flexible gold finger and the flexible gold finger 4 of the flexible printed circuit board 2 pass through TAB The pressing machine is hot-pressed on the LCD screen with ACF material, and the range of each process parameter is: hot-pressing temperature (set value): 210±10°C, hot-pressing time: 5~7 seconds, hot-pressing pressure (set value) value): 0.45~0.5MP; 3) Silicone gel 5 is coated on the upper surface of the flexible gold finger 4 and the surface of the electrode of the liquid crystal display that i...

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Abstract

A liquid display component consists of liquid crystal display screen, circuit board, flexible gold contact and film layer. The method for raising tensile strength of said screen with circuit board presses flexible gold contact on circuit board and film at flexible gold contact surface on electrode of said screen for realizing increase of tensile strength.

Description

【Technical field】: [0001] The invention relates to a liquid crystal display device and a method for improving the crimping tensile strength of a liquid crystal display electrode and a flexible gold finger. 【Background technique】: [0002] Such as figure 2 As shown, the substrate film 8 (i.e. polyimide material protective film) on the existing flexible printed circuit board 2 is connected to the copper foil 6 through the connecting agent 7, and the flexible golden finger 4 is plated on the surface of the copper foil. At present, generally The flexible printed circuit board (FPC for short) material of the liquid crystal display device is directly hot-pressed on the liquid crystal with anisotropic conductive film (ACF) with copper foil or rolled copper, electrolytic copper, and high-ductility electrolytic copper. On the display device, after the coating of silica gel is completed, the tensile strength (tension) is about 500~700g / cm, and after a period of time, the tensile stre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/133G02F1/1343H05K3/28
Inventor 宋富兵王细和
Owner 深圳市合力泰光电有限公司
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