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. 31, 2012
Filed:
Apr. 17, 2009
Jing-jie Dai, Taichung, TW;
Wen-chung Shih, Taichung, TW;
Bo-yuan Huang, Taichung, TW;
Su-hui Lin, Taichung, TW;
Yu-chieh Huang, Taichung, TW;
Jing-Jie Dai, Taichung, TW;
Wen-Chung Shih, Taichung, TW;
Bo-Yuan Huang, Taichung, TW;
Su-Hui Lin, Taichung, TW;
Yu-Chieh Huang, Taichung, TW;
HUGA Optotech Inc., Taichung, TW;
Abstract
A light emitting device, includes a substrate; a first semiconductor layer on the substrate; an active layer on the first semiconductor layer; a second semiconductor layer on the active layer; a transparent conductive layer on the second semiconductor layer; and a plurality of pillar structures with a hollow structure in the portion surface of the first semiconductor layer, thereby, the light extraction efficiency of the light emitting device can be improved due to the pillar structures with a hollow structure.