The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 01, 2024
Filed:
Aug. 19, 2022
Applicant:
Keiwa Inc., Tokyo, JP;
Inventor:
Chengheng Tsai, Tokyo, JP;
Assignee:
KEIWA INCORPORATED, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02F 1/00 (2006.01); G02F 1/1335 (2006.01); G02F 1/13357 (2006.01);
U.S. Cl.
CPC ...
G02F 1/133607 (2021.01); G02F 1/133603 (2013.01); G02F 1/133611 (2013.01);
Abstract
An optical sheetis built into a liquid crystal display apparatus in which a plurality of light sourcesare dispersed on a back surface side of a display screen. One surface of the optical sheethas an uneven surface. In a predetermined region R on the one surface of the optical sheet, a luminance enhancerthat improves the total light transmittance of the predetermined region R is provided so as to at least partially fill recessesof the uneven surface.