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:
Sep. 15, 2009
Filed:
Jul. 13, 2007
Ra-min Tain, Taipei County, TW;
Chun-chuan Lin, Hsinchu, TW;
Wei-kuo Han, Hsinchu, TW;
Je-ping HU, Hsinchu, TW;
Chen-hung Chew, Miaoli County, TW;
Ra-Min Tain, Taipei County, TW;
Chun-Chuan Lin, Hsinchu, TW;
Wei-Kuo Han, Hsinchu, TW;
Je-Ping Hu, Hsinchu, TW;
Chen-Hung Chew, Miaoli County, TW;
Industrial Technology Research Institute, Hsinchu, TW;
Abstract
A transmitting-type liquid crystal display projection system including a planar light source which emits planar white beam or planar R/G/B beams in succession is provided. A first polarization filter receives the planar light source and polarizes the same to be in a first polarization state. A liquid-crystal light valve receives the polarized planar light source, and converts the first polarization state to a second polarization state having a corresponding gray level. A second polarization filter receives a light output from the liquid crystal light valve to produce a second polarization light beam. A projection unit projects the second polarization light beam onto a display plane. Using the same planar light source, a polarization beam splitting (PBS) device with a refection-type liquid crystal light valve can be used to achieve the reflection-type projection system.