Liquid crystal display panel resource processing method

A technology of liquid crystal display panels and processing methods, applied in nonlinear optics, instruments, optics, etc., to achieve sustainable utilization and environmental benefits

Inactive Publication Date: 2007-01-24
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] To sum up, there is currently a lack of a technology that can process liquid crystal displays and recycle resources to the maximum extent. Metal indium in liquid crystal display panels of liquid crystal displays has a high recycling value as a rare metal

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A. First disassemble the electronic equipment containing the liquid crystal display panel, and remove the printed circuit board, drive circuit, backlight, light guide plate and other components. The printed circuit board can be processed separately, and the plastic parts such as the light guide plate can be directly processed according to plastic recycling;

[0030] B. Remove the polarizing film from the dismantled liquid crystal display panel, which can be soaked in acetone. The soaking time is subject to the peeling off of the polarizing film. The soaking time in organic solvent is 3 hours at room temperature;

[0031] C. Remove the sealed epoxy resin after soaking the liquid crystal display panel after removing the polarizing film with a nitric acid solution of 1:1 (volume ratio to water) under stirring. The reaction time is 4 hours, and the reaction temperature is 90° C. . After cleaning the liquid crystal panel with water, open the two glass substrates of the liqu...

Embodiment 2

[0037] Other conditions remain unchanged, in the step (B) of embodiment 1, use the nitric acid solution of 1:5 (to the volume ratio of water) instead to remove the polarizing film, heat to 80 ℃ and soak for 4 hours; To remove liquid crystals with xylene; steps

[0038] In (F), remove the metal coating according to the solution whose ratio of hydrochloric acid, nitric acid and water is 5:1:5 (volume ratio) instead, heat and stir, control the temperature at about 70°C, and react for 4 hours.

Embodiment 3

[0040] Other conditions remain unchanged, in the step (B) of embodiment 1, use the sodium hydroxide lye solution of 1:100 (to the weight ratio of water) instead to remove the polarizing film, heat to 80 ℃ and soak for 3 hours; step (F ), the metal coating was removed by a solution with a ratio of hydrochloric acid, nitric acid, and water of 7:1:9 (volume ratio), heated and stirred, and the temperature was controlled at about 80° C. for 3 hours.

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PUM

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Abstract

The method includes following steps: using manual work or dipping LCD faceplate in solvent to remove polarized light film; using cutting method or dipping faceplate in acid liquor to remove sealing epoxy resin to open up two pieces of base plate of LCD faceplate in glass; dipping faceplate in organic solvent to remove liquid crystal; after cleaning glass base plate, and dipping the base plate to acid leach liquor to remove metallized plating film so as to obtain clean glass base plate; picking up and refining indium from acid leach liquor. The invention carries out innocent treatment for worn-out LCD faceplates, and recovers resources.

Description

technical field [0001] The invention relates to a resource recovery process, in particular to a resource recovery treatment method for a liquid crystal display panel. Background technique [0002] As an important accessory of computers, monitors have also become the main object of recycling technology research. There are two types of displays currently in use: cathode ray tube displays (Cathode Ray Tubes, CRT for short) and liquid crystal displays (Liquid Crystal Display, LCD for short). Compared with cathode ray tube displays, liquid crystal displays have many advantages: flat display, small size, light weight, low power consumption, low driving voltage, can be directly driven by large-scale integrated circuits, can be displayed in a bright environment, the most important Because it does not contain harmful rays, it will not pollute the environment or endanger human health due to radiation. Although cathode ray tube displays still occupy a dominant position among the curr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/13
Inventor 郑正周培国罗兴章彭晓成王艳锦帖靖玺唐登勇钟云宋金伟张继彪李继红黄星发李培培李军状孟卓
Owner NANJING UNIV
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