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:
Oct. 28, 2003
Filed:
May. 09, 2002
Shin Gwo Shiue, Hsinchu Hsien, TW;
Mang Ou-Yang, Hsinchu, TW;
Jim Chung, Pingjen, TW;
I-Pen Chien, Tao-Yuan Hsien, TW;
K Laser Technology, Inc., Hsinchu, TW;
Abstract
The present invention provides a small reflective type liquid crystal projection device, which comprises an X-prism, three PBSs, two dichroic mirrors, at least three totally reflective mirrors, three reflective type liquid crystal plates, and a projection object lens. The present invention uses the X-prism matched with the three PBSs and a newly invented 3D light projection system to combine polarized light beams of the three primary colors into one, hence accomplishing the highest use efficiency and the design of light splitting and combining paths and color separating and combining. The reflective type liquid crystal projection device of the present invention has both the advantages of small volume and reduced cost.