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:
Jan. 05, 2024
Applicant:
Keiwa Incorporated, Tokyo, JP;
Inventor:
Satoshi Shiba, 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
A first surfaceof a light diffusion sheethas a light diffuserA provided with a plurality of recessesarrayed two-dimensionally and a plurality of luminance enhancersB that is flatter than the light diffuserA. The plurality of luminance enhancersB is provided in a gradation pattern such that the arrangement density is higher in a region where the luminance is lower in the luminance distribution generated by the plurality of point light sourceswhen the plurality of recessesis formed all over the first surface