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/2023/145199
Kind Code:
A1
Abstract:
An optical sheet laminate (100) is incorporated in a backlight unit (40). The optical sheet laminate (100) comprises: a plurality of diffusion sheets (43) in each of which a plurality of recesses (22) each having an approximately inverted quadrangular pyramid shape are provided on a first surface (21a); and a pair of prism sheets (44) and (45) laminated on the plurality of diffusion sheets (43) and having prism extension directions orthogonal to each other. The apex angle of each recess (22) is 95° or more. The recesses (22) are arranged in a two-dimensional matrix. The prism extension direction of the lower prism sheet (44) and the arrangement direction of the recesses (22) of an upper diffusion sheet (43A) cross each other at an angular difference of 30°or less.
More Like This:
| JP2005340209 | MULTIFUNCTIONAL HEADLIGHT FOR AUTOMOBILE |
| WO/2024/034459 | OPTICAL MEMBER AND ILLUMINATION DEVICE |
| JP2022519861 | Lighting device |
Inventors:
UENO HIROAKI (JP)
TSAI CHENGHENG (JP)
TSAI CHENGHENG (JP)
Application Number:
PCT/JP2022/042381
Publication Date:
August 03, 2023
Filing Date:
November 15, 2022
Export Citation:
Assignee:
KEIWA INC (JP)
International Classes:
F21V5/00; F21S2/00; F21V5/02; G02B5/02; G02F1/13357; F21Y115/10
Domestic Patent References:
| WO2005083475A1 | 2005-09-09 |
Foreign References:
| JP2021162840A | 2021-10-11 | |||
| CN1841151A | 2006-10-04 | |||
| JP2006302876A | 2006-11-02 |
Attorney, Agent or Firm:
MAEDA & PARTNERS (JP)
Download PDF: