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Title:
OPTICAL SHEET, BACKLIGHT UNIT, IMAGE DISPLAY DEVICE, LIGHTING DEVICE, AND METHOD FOR MANUFACTURING OPTICAL SHEET
Document Type and Number:
WIPO Patent Application WO/2024/122631
Kind Code:
A1
Abstract:
The present invention addresses the problem of providing an optical sheet having high light transmission property and light diffusion property, and having high handleability. An optical sheet according to one aspect of the present invention is provided with a base material layer having polyester as a main component, and has first protruding portions on at least one surface of the base material layer, and a value obtained by multiplying the aspect ratio of the first protruding portion by 1000 is less than 15. In a preferred aspect, the ratio SRz/SRa of ten point average roughness SRz to average roughness SRa of the one surface is 17-45.

Inventors:
TANI SATORU (JP)
NONAKA TADAYUKI (JP)
NAZIKIAN TOMOKI (JP)
Application Number:
PCT/JP2023/043991
Publication Date:
June 13, 2024
Filing Date:
December 08, 2023
Export Citation:
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Assignee:
KEIWA INCORPORATED (JP)
International Classes:
G02B5/02; B32B7/022; B32B7/023; B32B27/36; F21S2/00; F21Y115/10
Foreign References:
JP2014233859A2014-12-15
JP2002350617A2002-12-04
JP2010064258A2010-03-25
JP2022142332A2022-09-30
JP2010065229A2010-03-25
JP2007290322A2007-11-08
JP2011209414A2011-10-20
JP2010049243A2010-03-04
JP2006053538A2006-02-23
JP2022151302A2022-10-07
JP7163998B12022-11-01
JP2022171521A2022-11-11
Attorney, Agent or Firm:
SAKAMOTO & PARTNERS (JP)
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