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:
Nov. 14, 2023
Filed:
Nov. 30, 2022
Epistar Corporation, Hsinchu, TW;
Yenrich Technology Corporation, Hsinchu, TW;
EPISTAR CORPORATION, Hsinchu, TW;
Yenrich Technology Corporation, Hsinchu, TW;
Abstract
A backlight module is provided. The backlight module includes a substrate having a substrate surface, a conductive layer disposed on the substrate surface, a plurality of LED chips disposed on and electrically connected to the conductive layer, a light-permeable layer having a light-permeable surface away from the substrate surface, and a pattern layer disposed on the light-permeable surface and having a plurality of first patterns corresponding to and respectively located above the plurality of LED chips. Wherein, each first pattern has a maximum width. A maximum width of one first pattern satisfies the following formula:≥2()(1−1/);wherein Wis the maximum width of one first pattern, n is a refractivity of the light-permeable layer, Tis a thickness of the light-permeable layer, Tis a thickness of the LED chip, Wis a maximum width of LED chip corresponding to the first pattern.