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:
Mar. 18, 2025
Filed:
Mar. 13, 2023
Coretronic Corporation, Hsin-Chu, TW;
Ying-Hsiang Chen, Hsin-Chu, TW;
Cheng-Yi Tseng, Hsin-Chu, TW;
Chung-Yang Fang, Hsin-Chu, TW;
Ping-Yen Chen, Hsin-Chu, TW;
Coretronic Corporation, Hsin-Chu, TW;
Abstract
A backlight module includes a light guide element including first optical microstructures and second optical microstructures. An angle value of an angle of the first optical microstructures is V1. When the second optical microstructures are respectively recessed into or protrude from a bottom surface, a projection of each sub-optical microstructure on a reference plane has a peak point closest or to farthest from a light emitting surface and a first valley point and a second valley point farthest from or closest to the light emitting surface, a height difference between the peak point and the first valley point or the second valley point is ΔH, a length difference between the peak point and the first valley point or the second valley point is ΔL, and tan(ΔH/ΔL) is V2, where V2>0 and V2≤0.5·V1.