Title:
OPTICAL SHEET LAMINATE, BACKLIGHT UNIT, LIQUID CRYSTAL DISPLAY DEVICE, INFORMATION EQUIPMENT, AND PRODUCTION METHOD FOR BACKLIGHT UNIT
Document Type and Number:
WIPO Patent Application WO/2023/282055
Kind Code:
A1
Abstract:
This optical sheet laminate 100 is incorporated in a backlight unit 40 that uses a blue light source 42. The optical sheet laminate 100 comprises: a diffusion sheet 43 provided with, in a first surface 21a, a plurality of recesses 22 each having substantially the shape of an inverted quadrangular pyramid; and a pair of prism sheets 44, 45, the respective prism extension directions thereof being perpendicular to one another. The diffusion sheet 43 is disposed as a single sheet or as a plurality of stacked sheets. The plurality of recesses 22 are arranged in a two-dimensional matrix, and the angle of intersection between the arrangement direction of the recesses 22 and the prism extension directions is 20° to 70°.
Inventors:
TSAI CHENGHENG (JP)
Application Number:
PCT/JP2022/024795
Publication Date:
January 12, 2023
Filing Date:
June 22, 2022
Export Citation:
Assignee:
KEIWA INC (JP)
International Classes:
G02B5/02; F21S2/00; F21V9/08; F21V9/30; G02B5/04; G02F1/1335; G02F1/13357; F21Y115/10; F21Y115/30
Domestic Patent References:
| WO2010010840A1 | 2010-01-28 |
Foreign References:
| JP2020079920A | 2020-05-28 |
Attorney, Agent or Firm:
MAEDA & PARTNERS (JP)
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