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:
Jun. 07, 2005
Filed:
May. 06, 2003
Tsutou Asakura, Kanagawa, JP;
Tetsuji Suzuki, Kanagawa, JP;
Masaru Kanazawa, Tokyo, JP;
Koichi Hamada, Tokyo, JP;
Fumio Okano, Tokyo, JP;
Tsutou Asakura, Kanagawa, JP;
Tetsuji Suzuki, Kanagawa, JP;
Masaru Kanazawa, Tokyo, JP;
Koichi Hamada, Tokyo, JP;
Fumio Okano, Tokyo, JP;
Nippon Hoso Kyokai, Tokyo, JP;
Abstract
In a liquid crystal projector device, a first polarization beam splitterseparates an entering green light into first and second green lights perpendicular to each other, and a first liquid crystal elementmodulates the first green light via a second polarization beam splitter. Also, in the device of the present invention, while a first half-wave platerevolves 90 degree a polarized plane of the second light separated by the first polarization beam splitter, a second liquid crystal elementmodulates the second green light via a third polarization beam splitter, a second half-wave platerevolves 90 degree a polarized plane of the second light transmitted through the third polarization beam splitter, and a fourth polarization beam splittertransmits the first green light transmitted through the second polarization beam splitterand reflects the second green light form the second half-wave plate