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Method of inspecting polarizing film

A technology of polarizing film and inspection method, applied in the direction of material analysis, measuring device, instrument, etc. by optical means

Inactive Publication Date: 2011-02-23
SUMITOMO CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, on the polarizing film, among the defects detected by the defect inspection device, the part containing only allowable defects can be used as a product, but it cannot be used as a product because of the mark.

Method used

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  • Method of inspecting polarizing film
  • Method of inspecting polarizing film

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0036] The following combination figure 1 One embodiment of the polarizing film inspection method of the present invention will be briefly described.

[0037] First, a corona discharge treatment is performed on the widthwise end surface of a raw polarizing film (a polarizing film that is formed into a long strip and can be cut to obtain a plurality of polarizing films having a size corresponding to the application) ( S1 ). As for the output of the corona discharge device used in the corona discharge treatment, it may be properly optimized. This step S1 is to make the surface of the end of the width direction of the polarizing film rough, so as to improve the adhesiveness of the printing ink and prevent the printed identification code from peeling off. However, this step can be omitted in the case of strong adhesiveness of the polarizing film. .

[0038] Then, for the original polarizing film, use an inspection device to inspect the surface or internal defects (scratch or for...

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Abstract

Defects of a belt-like polarizing film are detected by using a defect inspection device (S2), and, based on the detection results about the defects, defect position data for indicating the positions of the defects is created and stored in a storage medium (S3), and the belt-like polarizing film is taken up on a roll (S5). Then, the belt-like polarizing film is wound off from the roll (S6), and other film is stacked on the belt-like polarizing film (S7). After stacking the other film, the defect position data stored in the storage medium is read in to identify the positions of the defects in the polarizing film based on the read-in defect position data (S8). Based on the identified positions of the defects, marks are formed near the positions of the defects on the other film (S9). Consequently, marks can be formed near the positions of the defects detected by the defect inspection device without making unusable a portion of the polarizing film which contains only the acceptable defects out of the defects detected by the defect inspection device.

Description

technical field [0001] The invention relates to a method for inspecting a polarizing film, which is to wind the film onto a roller after detecting the defects existing on the strip-shaped polarizing film, and pull out the rolled strip-shaped polarizing film from the roller, and place the strip-shaped polarizing film on the Draw a line near the defect position after laminating other films on the polarizing film. Background technique [0002] In the manufacturing process of polarizing films used in liquid crystal display panels, etc., various processes are automatically performed in the form of long and large strips with a fixed width, and finally cut into predetermined shapes according to product specifications. [0003] In the past, there was an inspection method of a polarizing film (for example, patent document 1), which used a defect inspection device (automatic inspection machine) to automatically detect defects in a strip-shaped polarizing film, and for easy identificat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/892
CPCG01N2021/888G01N21/896G01N2021/8861G01N2021/9511
Inventor 篠塚淳彦笠井利行山根尚德
Owner SUMITOMO CHEM CO LTD
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