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. 20, 2001
Filed:
Sep. 10, 1999
Kuo-Tung Tiao, Hsinchu, TW;
Fu-Ming Chuang, Hsinchu Hsien, TW;
Jinn-Chou Yoo, Hsinchu, TW;
Sheng-Hsiung Chan, Hsinchu Hsien, TW;
Tzeng-Ke Shiau, Hsinchu Hsien, TW;
Industrial Technology Research Institute, Hsinchu, TW;
Abstract
An illumination device and an image projection apparatus having the same. The illumination device has a light source with multiple light emitting devices and an uniform illuminating means evenly distributed in front of the light source. The light emitted from the light source can thus uniformly project on a light valve. In addition, a polarization converter is used to convert the light into a usable polarization type, so as to increase the illumination efficiency. The image projection apparatus basically has three of the above mentioned illumination devices to emit three elementary color lights projecting onto a screen.