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. 29, 2013
Filed:
Mar. 23, 2009
Tzong-liang Tsai, Taichung, TW;
Lin-chieh Kao, Taichung, TW;
Shu-ying Yang, Taichung, TW;
HUGA Optotech Inc., Taichung, TW;
Abstract
An optical device is provided which includes a first electrode; a substrate disposed on the first electrode; a multi-layer structure disposed on the substrate, and the multi-layer structure consisted of a plurality of insulating layers with different refractive indices formed alternately; a first conductive semiconductor layer disposed on the substrate to cover the multi-layer structure; an active layer disposed on the first conductive semiconductor layer; a second conductive semiconductor layer disposed on the active layer; a transparent conductive layer disposed on the second conductive semiconductor layer; and a second electrode disposed on the transparent conductive layer, thereby, the multi-layer structure can increase the light reflective effect or anti-reflective effect within the optical device to improve the light emitting-efficiency.