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:
Jul. 23, 2013
Filed:
Dec. 09, 2010
Sheng-hung Lin, Hsin-Chu, TW;
Jung-min Hwang, Hsin-Chu, TW;
Udo Custodis, Hsin-Chu, TW;
Shih-yuan Yu, Hsin-Chu, TW;
Sheng-Hung Lin, Hsin-Chu, TW;
Jung-Min Hwang, Hsin-Chu, TW;
Udo Custodis, Hsin-Chu, TW;
Shih-Yuan Yu, Hsin-Chu, TW;
Young Lighting Technology Inc., Hsin-Chu, TW;
Abstract
A light guide plate (LGP) includes a first surface, a second surface, and a plurality of light incident surfaces. The first surface is a light-emitting surface. The light incident surfaces connect the first surface and the second surface. The second surface has a plurality of ring-shaped grooves. Depths of the ring-shaped grooves are gradually decreased from a place close to a center of the LGP towards places close to the light incident surfaces. Each of the ring-shaped grooves has a first ring-shaped side wall surface and a second ring-shaped side wall surface. The second ring-shaped side wall surface is opposite to the first ring-shaped side wall surface and located between a geometry center of the ring-shaped groove and the first ring-shaped side wall surface. The first ring-shaped side wall surface is a tilted surface. In addition, a light source apparatus is also provided.