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:
May. 24, 2011
Filed:
Mar. 17, 2008
Hiroaki Yanai, Shiojiri, JP;
Takashi Endo, Azumino, JP;
Hiroaki Yanai, Shiojiri, JP;
Takashi Endo, Azumino, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
A projector includes: an optical modulator including a liquid crystal cell, a first optical element formed of an optical material having positive uniaxiality, a second optical element formed of an optical material having positive uniaxiality, a third optical element including at least one optical film formed of optical material having a refractive index anisotropy, and a pair of polarization elements; an adjustment mechanism that can adjust an optical azimuth of a first group, having at least one of the first optical element, second optical element, and at least one optical film included in the third optical element, with respect to a fixed optical azimuth of a second group as a remainder excluding the element included in the first group among the first to third optical elements; a light source generating light for illuminating the optical modulator; and a projection optical system projecting the light passed through the optical modulator.