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:
Sep. 25, 2012
Filed:
Mar. 12, 2010
Norio Nakamura, Matsumoto, JP;
Norio Nakamura, Matsumoto, JP;
Seiko Epson Corporation, , JP;
Abstract
A display apparatus includes: a light modulator having translucent windows; a light emitter having a light source; a light guide having a tubular reflecting surface guiding light source light to the light modulator; and a light separator having a light separation surface separating guided light into transmitted and reflected light. The tubular reflecting surface narrows from the light modulator toward the light emitter to guide the reflected light to the windows. Denoting a lateral cross-sectional area of an inside area of the tubular reflecting surface at a light source end as S, a lateral cross-sectional area of the tubular reflecting surface at a light separation surface end as S, and a maximum incident angle at which light from the light source reflected by the tubular reflecting surface is input to the light separation surface as θ, θ×√(S/S)≧110.