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:
Oct. 27, 2015
Filed:
Oct. 31, 2013
Seiko Epson Corporation, Tokyo, JP;
Masakazu Kawamura, Matsumoto, JP;
Kanji Yoshida, Azumino, JP;
SEIKO EPSON CORPORATION, Tokyo, JP;
Abstract
A projector includes a solid-state light source, a diffuser member, an excitation light source, a phosphor, a light modulator, a projection system, a first and a second light blocking members. When the area, viewed in the direction of the optical axis of diffused light, of an opening of the first light blocking member and the area of a portion over which the first light blocking member blocks the diffused light are defined as Aand A, respectively; the area, viewed in the direction of the optical axis of fluorescence, of an opening of the second light blocking member and the area of a portion over which the second light blocking member blocks the fluorescence are defined as Band B, respectively, the ratio A/Ais greater than the ratio B/B