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:
Feb. 02, 2010
Filed:
Aug. 22, 2007
Chih-chiang Chao, Taipei, TW;
Po-ling Shiao, Hsinchu, TW;
Yu-tsan Tseng, Taoyuan County, TW;
Cheng-hsuan Lin, Changhua County, TW;
Mei-chun Lai, Miaoli County, TW;
Chih-Chiang Chao, Taipei, TW;
Po-Ling Shiao, Hsinchu, TW;
Yu-Tsan Tseng, Taoyuan County, TW;
Cheng-Hsuan Lin, Changhua County, TW;
Mei-Chun Lai, Miaoli County, TW;
Industrial Technology Research Institute, Hsinchu, TW;
Abstract
A composite lens structure is disclosed. The composite lens structure includes a diffusion plate and an optical structure formed on the diffusion plate. The optical structure includes a plurality of convex portions arranged in a 2-D matrix along a first direction and a second direction and a plurality of concave portions arranged in a 2-D matrix also along the first direction and the second direction. Each convex portion adjacent to a plurality of concave portions includes a low curvature portion and a high curvature portion higher than the low curvature portion. Each concave portion adjacent to a plurality of convex portions includes a low curvature portion and a high curvature portion lower than the low curvature portion. The convex portions, the concave portions and each junction of the convex portion and the concave portion have a curvature different from 0.