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Title:
OPTICAL SHEET, BACKLIGHT UNIT, LIQUID CRYSTAL DISPLAY APPARATUS, AND INFORMATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/235491
Kind Code:
A1
Abstract:
An optical sheet 5 has an irregular shape on at least a first surface thereof. The first surface has a glare contrast of 4 % or less as measured in accordance with JIS C 1006: 2019. The first surface may have an arithmetic mean roughness Ra of 0.6 μm or less as measured in accordance with JIS B 0601: 2001 (where the evaluation length is set to 290 μm). The first surface may have a peak count RPc of 16 or more as measured in accordance with JIS B 0601: 2001 (where the evaluation length is set to 290 μm).

Inventors:
SASA Kenta (JP)
Application Number:
PCT/JP2021/019000
Publication Date:
November 25, 2021
Filing Date:
May 19, 2021
Export Citation:
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Assignee:
KEIWA INC. (JP)
International Classes:
G02B5/02; F21S2/00; G02F1/13357; F21Y115/10
Attorney, Agent or Firm:
MAEDA & PARTNERS (JP)
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