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Method of cutting prism sheet

A cutting method and prism sheet technology, applied in prisms, lenses, optics, etc., to achieve the effect of suppressing linear chips

Inactive Publication Date: 2011-01-12
MITSUBISHI CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In addition, there is such a problem that when cutting a prism sheet whose surface fine prisms are covered with a protective film, linear chips inevitably occur

Method used

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  • Method of cutting prism sheet
  • Method of cutting prism sheet
  • Method of cutting prism sheet

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Experimental program
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Embodiment Construction

[0059] Next, the cutting method of the prism sheet according to the first preferred embodiment of the present invention will be described with reference to the accompanying drawings. figure 1 It is a schematic sectional view showing an example structure of a prism sheet cut by a prism sheet cutting method according to a preferred embodiment of the present invention.

[0060] Such as figure 1As shown, a prism sheet 1 is an optical sheet used for a backlight of a liquid crystal display device, etc., and one surface of a base sheet 2 has a microprism portion 4 composed of triangular columnar microprisms arranged side by side. Prism sheet 1 also has: the lens protection film 6 that covers tiny prism portion 4 and is attached on one face of prism sheet 1; Protective film on the bottom surface8.

[0061] Generally, the prism sheet 1 is manufactured by cutting a long prism sheet in which microprism portions composed of columnar microprisms arranged side by side are formed on one si...

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PUM

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Abstract

A method of cutting a prism sheet, in which breakage of microlens, fuzz generation, etc. can be inhibited. The method of cutting a prism sheet is one in which prism sheet (1) having a base material sheet and, provided on one major surface thereof, microprism part (4) is cut into a desired shape, characterized by including the steps of disposing the prism sheet on cutting unit (10) equipped with ablade so that the surface on the side provided with the microprism part lies opposite to blade (18); making relative move of the blade toward the prism sheet so as to, from the surface provided with the microprism part, bring the blade into contact with the prism sheet; and cutting the prism sheet into a desired shape by means of the blade.

Description

technical field [0001] The present invention relates to a prism sheet cutting method, and in particular, relates to a prism sheet cutting method for cutting a prism sheet having a surface formed with lens portions made of minute prism shapes into desired shapes. Background technique [0002] A backlight or the like used in a liquid crystal display device is provided with a lens-shaped prism sheet in which prisms are continuously formed on the entire surface. As the manufacturing method of this prism sheet, the following method is known (for example, refer to Japanese Patent Document 1): under the state after sandwiching the ultraviolet curable resin, an elongated resin base (substrate) is wound on a circle. Around the cylindrical lens mold, ultraviolet curable resin is cured with ultraviolet rays to produce a long prism sheet in which microlens portions are formed on one surface of the substrate. [0003] Patent Document 1: Japanese Patent Laid-Open No. 2002-67058 [0004]...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B5/04B26D1/08G02B3/00G02B5/02
Inventor 田中孝幸
Owner MITSUBISHI CHEM CORP