Title:
OPTICAL SHEET LAMINATE, BACKLIGHT UNIT, LIQUID CRYSTAL DISPLAY DEVICE, AND INFORMATION APPARATUS
Document Type and Number:
WIPO Patent Application WO/2023/007917
Kind Code:
A1
Abstract:
An optical sheet laminate 100 that is to be interposed between a light source 42 and a prism sheet 44 of a backlight unit 40. The optical sheet laminate 100 comprises a plurality of light diffusion sheets 43 that have a plurality of substantially inverted-rectangular-pyramid-shaped recesses 22 at one surface. The recesses 22 of a first light diffusion sheet 43A that is closest to the prism sheet 44 are at a light emission surface 21a. The recesses 22 of at least one second light diffusion sheet 43B of the light diffusion sheets 43 that are not the first light diffusion sheet 43A are at a light incidence surface 21b. The first light diffusion sheet 43A contains 0–2 mass% of a diffusion agent.
Inventors:
UENO HIROAKI (JP)
TSAI CHENGHENG (JP)
TSAI CHENGHENG (JP)
Application Number:
PCT/JP2022/020854
Publication Date:
February 02, 2023
Filing Date:
May 19, 2022
Export Citation:
Assignee:
KEIWA INC (JP)
International Classes:
F21S2/00; G02B5/02; G02F1/13357
Domestic Patent References:
| WO2008026540A1 | 2008-03-06 |
Foreign References:
| JP2020086432A | 2020-06-04 | |||
| JP3117662U | 2006-01-12 |
Attorney, Agent or Firm:
MAEDA & PARTNERS (JP)
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