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. 03, 2007
Filed:
Dec. 30, 2004
CI Guang Peng, Chia-I, TW;
Hsin Wen Tsai, Taipei Hsien, TW;
Po Liang Chiang, Taipei, TW;
Yi Wei Liu, Taipei Hsien, TW;
Hsueh-chen Chang, I-Lan Hsien, TW;
Ci Guang Peng, Chia-I, TW;
Hsin Wen Tsai, Taipei Hsien, TW;
Po Liang Chiang, Taipei, TW;
Yi Wei Liu, Taipei Hsien, TW;
Hsueh-Chen Chang, I-Lan Hsien, TW;
United Microdisplay Optronics Corp., Hsin-Chu, TW;
Abstract
A polarization conversion system suited for LCD or LCoS-based projection applications is disclosed. The present invention polarization conversion system encompasses a light pipe with a rectangular light tunnel therein defined by four side reflection mirrors. A front reflection with an aperture thereon is mounted on an entrance face of the light pipe. A first polarization beam splitter is mounted on an exit face of the light pipe. A retardation plate, which is perpendicular to the exit face, is situated atop the first polarization beam splitter. A reflection mirror is situated atop the retardation plate. A second polarization beam splitter is mounted under the first polarization beam splitter and is opposite to the retardation plate.