Title:
LIGHT DIFFUSION SHEET, BACKLIGHT UNIT, LIQUID CRYSTAL DISPLAY DEVICE, AND INFORMATION EQUIPMENT
Document Type and Number:
WIPO Patent Application WO/2022/196162
Kind Code:
A1
Abstract:
This light diffusion sheet 43 has a first surface 21a that is a light emitting surface, and a second surface 21b that is a light incidence surface. A plurality of recessed parts 22 having substantially reverse polygonal pyramid shapes are provided to the first surface 21a. The arithmetic mean roughness of the second surface 21b is 3.0 μm or less. The internal haze of the light diffusion sheet 43 is 1.5% or less.
Inventors:
TSAI CHENGHENG (JP)
Application Number:
PCT/JP2022/004369
Publication Date:
September 22, 2022
Filing Date:
February 04, 2022
Export Citation:
Assignee:
KEIWA INC (JP)
International Classes:
G02B5/02; F21S2/00; G02F1/1335; G02F1/13357
Foreign References:
| JP2012114003A | 2012-06-14 | |||
| JP2020086432A | 2020-06-04 | |||
| JP2014059525A | 2014-04-03 | |||
| JP2011129277A | 2011-06-30 |
Attorney, Agent or Firm:
MAEDA & PARTNERS (JP)
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