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Method and apparatus for inspecting defect of laminated film

A technique for defect inspection, lamination of films, used in measuring devices, transportation and packaging, testing moving boards, etc.

Inactive Publication Date: 2012-01-18
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In addition, when there is a defect in the protective membrane or the separation membrane, there is also a problem that the defect is mistakenly identified as a defect in the main body of the membrane.

Method used

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  • Method and apparatus for inspecting defect of laminated film
  • Method and apparatus for inspecting defect of laminated film
  • Method and apparatus for inspecting defect of laminated film

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Embodiment Construction

[0052] Next, an embodiment of the present invention will be described with reference to the drawings.

[0053] figure 1 Represents the whole defect inspection device implementing the method of the present invention, Figure 2 ~ Figure 4 Each part of the defect inspection device is shown enlarged. In this defect inspection device, from figure 1 On the right side in the middle, the protective film recovery unit 1, the first inspection unit 2, the laminated membrane supply unit 3, the separation membrane recovery unit 4, the second inspection unit 5, the separation membrane sticking unit 6, and the separation membrane supply unit are arranged in a row. 7. Marking section 8, protective film sticking section 9, data recording processing section 10, laminated film recovery section 11, protective film supply section 12, protective film edge recovery section 13 and protective film separation membrane recovery section 14, and, Each part except the protective film recovery part 1 i...

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Abstract

A method for inspecting defects of a laminated film is provided with a first inspection step of inspecting existence of defects on the surface of a film main body from which a protection film is removed; a separator removing step of removing a separator from the laminated film after inspection; a second inspection step wherein existence of defects on the film main body in the vertical posture is inspected, while guiding the film main body, from which the separator is removed, to a film feeding path to the vertical direction, and inspection data is stored; a separator attaching step and a protection film attaching step for attaching the rear surface and the front surface of the inspected film main body, respectively; and a film recovery step of rolling up the inspected laminated film whereupon the protection film and the separator are attached.

Description

technical field [0001] The present invention relates to a defect inspection method and device for a laminated film for inspecting defects such as staining and damage of a laminated film used in a polarizing plate of a liquid crystal display, a glass substrate, and the like. Background technique [0002] In the manufacturing process of a liquid crystal display, the process of affixing a thin single film (polarizing plate) to a strip-shaped functional film (retardation film) to produce a laminated optical film can be used (refer patent document 1). [0003] Patent Document 1: Japanese Unexamined Patent Publication No. 2007-76106 [0004] The single film (polarizing plate) attached to the tape-shaped functional film is formed into a laminated film in which a separation film is attached to the back side adhesive surface of the film main body and a protective film is attached to the surface. The material roll in which the longitudinally long laminated film is wound is supplied t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/892G02B5/30
CPCB65H37/002B65H37/04G01N21/8422G01N2021/8864G01N21/8914B65H7/02G01N21/86G01N21/892G02B5/30
Inventor 大桥宏道佐藤幸介
Owner NITTO DENKO CORP
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