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:
Apr. 06, 2004
Filed:
Aug. 26, 2003
Ryo Nishima, Yokohama, JP;
Morihiko Ota, Moriya, JP;
Victor Company of Japan, Limited, Yokohama, JP;
Abstract
By mounting a projection lens to a first supporting member for fixing spatial light modulators, polarization beam splitters and a cross dichroic prism, and providing a second supporting member having a thermal expansion coefficient larger than that of the first supporting member between the projection lens and the first supporting member, afluctuation of distance between the spatial light modulators and the projection lens due to heat generated by a light source lamp of a projection type display apparatus and temperature change in use environment can be canceled so that an optimum projected image having nothing to do with being out of focus can always be obtained.