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:
Aug. 02, 2005
Filed:
Mar. 16, 2004
Yoshitaka Ito, Suwa, JP;
Yoshitaka Ito, Suwa, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
A projector is provided which can realize a bright projected image of high light utilization efficiency while combining a reflective-type liquid crystal device and an integrator optical system. The projector may include a light source lamp, a light beam dividing optical element, a polarization conversion element, a polarization selection element having a polarization selection surface, and an electro-optical device. When a plane of incidence including a normal line of the polarization selection surface and the central axis of an incident light is assumed, the direction parallel to the plane of incidence and perpendicularly intersecting the central axis is assumed to be the X-axis direction, and the direction perpendicularly intersecting the plane of incidence is assumed to be the Y-axis direction, the direction of polarization beam separation by the polarization conversion element is the X-axis direction.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile