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:
Jan. 27, 2026
Filed:
Aug. 05, 2024
Keiwa Incorporated, Tokyo, JP;
Chengheng Tsai, Tokyo, JP;
KEIWA Incorporated, Tokyo, JP;
Abstract
An optical sheet laminateto be incorporated into a backlight unitincludes a plurality of diffusion sheetshaving a first surfacea having a plurality of recesseshaving a substantially inverted polygonal pyramid shape, and a pair of prism sheetsandhaving prism extending directions perpendicular to each other. An arrangement direction of the recessesof one of the plurality of diffusion sheetsclosest to the prism sheetsandintersects with the prism extending directions at an angle of 0° or more and 20° or less, or 70° or more and 90° or less.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile