Title:
OPTICAL SHEET LAMINATE, BACKLIGHT UNIT, LIQUID CRYSTAL DISPLAY DEVICE, INFORMATION EQUIPMENT, AND PRODUCTION METHOD FOR OPTICAL SHEET LAMINATE
Document Type and Number:
WIPO Patent Application WO/2023/090189
Kind Code:
A1
Abstract:
An optical sheet laminate (100) is built into a liquid crystal display device in which a plurality of point light sources (42) are dispersedly provided on the back surface side of a display screen. The optical sheet laminate (100) is provided with a first optical sheet (43) in which a first print pattern (101A) that at least partially suppresses the transmission of light from the plurality of point light sources (42) is formed on a first surface (21b). A second print pattern (101B) that at least partially suppresses the transmission of light from the plurality of point light sources (42) is formed on a second optical sheet (43) different from the first optical sheet (43) or a second surface (21a) of the first optical sheet (43). Brightness ununiformity caused by the plurality of point light sources (42) is suppressed by the first print pattern (101A) and the second print pattern (101B), thereby achieving uniform brightness.
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Inventors:
UEJI SATOSHI (JP)
KARIYA YU (JP)
SHIBA SATOSHI (JP)
KARIYA YU (JP)
SHIBA SATOSHI (JP)
Application Number:
PCT/JP2022/041400
Publication Date:
May 25, 2023
Filing Date:
November 07, 2022
Export Citation:
Assignee:
KEIWA INC (JP)
International Classes:
F21S2/00; G02F1/13357; F21Y105/16; F21Y115/10
Domestic Patent References:
| WO2018155304A1 | 2018-08-30 |
Foreign References:
| JP2011044425A | 2011-03-03 | |||
| JP2006030910A | 2006-02-02 | |||
| JP2010040236A | 2010-02-18 |
Attorney, Agent or Firm:
MAEDA & PARTNERS (JP)
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