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. 24, 2008
Filed:
Oct. 05, 2005
Kanji Yoshida, Azumino, JP;
Hidemasa Yamakawa, Matsumoto, JP;
Joji Karasawa, Okaya, JP;
Masafumi Sakaguchi, Suwa, JP;
Kanji Yoshida, Azumino, JP;
Hidemasa Yamakawa, Matsumoto, JP;
Joji Karasawa, Okaya, JP;
Masafumi Sakaguchi, Suwa, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
Aspects of the invention can provide a projector that includes three optical modulators which modulate respectively red light, green light, and blue light, a color-synthetic optical system which synthesizes the light modulated by the three optical modulators, and a projection optical system which projects the light synthesized by the color-synthetic optical system. The color-synthetic optical system can include a first reflection film that reflects the green light, and a second reflection film that reflects the blue light, the first reflection film and the second reflection film are arranged in the shape of an X character, and a wavelength in which a reflectance factor of the first reflection film comes to 50% can be longer than a wavelength in which a reflectance factor of the second reflection film comes to 50%.