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Method for repairing plasma display screen heat pressing badness

A plasma display screen and plasma display technology, applied in defective lamp tubes/lamp repair/regeneration, electronic waste recycling, measurement/test in the manufacturing process, etc., can solve the problem of unclean removal, hard objects that easily damage electrodes, and pollution environment and other issues to achieve good protection and improve the success rate

Inactive Publication Date: 2009-03-25
四川世纪双虹显示器件份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The mechanical method requires relatively high technical proficiency of the operator. At the same time, the hard object used for scraping is too hard to easily damage the electrode, and the ACF is too soft to remove it. The chemical method is better in removing ACF, but the disadvantage is that it pollutes the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] In the present invention, it is first necessary to check whether there is foreign matter or dust in the heat-pressed part of the plasma display, which causes excessive resistance of the conductive path and poor display of the plasma display due to poor contact, and then hot-press repair can be carried out;

[0013] Secondly, first tear off the ultraviolet curing UV resin / silica gel bonded between the plasma display screen and the flexible circuit board TCP / flexible circuit board COF packaged with integrated circuit chips; then use a hot air gun to blow the flexible circuit board TCP / package The flexible circuit board COF with the integrated circuit chip and the thermal pressing part of the screen are torn off the flexible circuit board TCP / the flexible circuit board COF with the integrated circuit chip packaged, the temperature of the heat gun is controlled at 120°C, and the distance from the hot pressing part is 2CM; then Then use a hot air gun to blow the anisotropic c...

Embodiment 2

[0016] First check that there is no accurate positioning between the flexible circuit board TCP / the flexible circuit board COF packaged with integrated circuit chips and the silver electrode on the screen in the hot pressing part of the plasma display, resulting in excessive resistance of the conductive path and poor contact, resulting in plasma display display If it is not good, it can be repaired by hot pressing;

[0017] Secondly, first tear off the ultraviolet curing UV resin / silica gel bonded between the plasma display screen and the flexible circuit board TCP / flexible circuit board COF packaged with integrated circuit chips; then use a hot air gun to blow the flexible circuit board TCP / package The flexible circuit board COF with integrated circuit chip and the hot pressing part of the screen are torn off the flexible circuit board TCP / the flexible circuit board COF with integrated circuit chip packaged. The temperature of the heat gun is controlled at 120 ° C - 180 ° C 2...

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PUM

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Abstract

The invention discloses a repair method for bas hot pressing of plasma display screen. Wherein, tearing off the UV resin / silica gel glued between screen and TCP / COF; blowing the hot pressing part of TCP / COF and screen with a hot-wind gun with distance away the hot pressing part of 2-3cm while tearing off TCP / COF at 120-180Deg; blowing hot pressing part of ACF and screen with the hot-wind gun with distance away the hot pressing part of 2-3cm at 120-180Deg while razing the ACF with printed circuit board; clearing and detecting Ag-electrode; on condition that said electrode has no damage, re-hotpressing the screen. This invention increases success rate of hot pressing repair and has no damage to electrode.

Description

technical field [0001] The invention belongs to the technical field of gas discharge, and in particular relates to a method for repairing poor thermal pressure of a plasma display screen. Background technique [0002] Now, foreign matter and dust are the main causes of poor display. The measures taken are to improve the cleanliness of the working area on the one hand, and to carry out hot-pressing repair on the other hand. At present, PDP manufacturers mainly use mechanical and chemical methods to remove UV resin, TCP / COF, and ACF. The mechanical method is to remove foreign matter and dust by tearing off the UV resin / silica gel and TCP / COF, hard objects (electric brushes, etc.) ACF; the chemical method is to soak the UV resin / silica gel, TCP / COF, ACF (anisotropic conductive film) removal; [0003] The mechanical method requires relatively high technical proficiency of the operator. At the same time, the hard object used for scraping is too hard to easily damage the electr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01J9/50H01J9/42
CPCY02W30/82
Inventor 张国礼
Owner 四川世纪双虹显示器件份有限公司
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