Projection type display apparatus which detects light emitted from a face of a beam splitter and method thereof
US7887189B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 6, 2007 |
| Grant date | Feb 15, 2011 |
| Priority date | — |
| Expiry date | Aug 14, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B33/12
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Disclosed herein is a projection type display apparatus, including: a color separation optical system configured to separate light from a light source into a plurality of light fluxes of different colors; a plurality of reflection type light valve devices provided individually for the color light fluxes; a plurality of polarization beam splitters each configured to polarize and separate a predetermined one of the color light fluxes separated by said color separation optical system and then polarize and separate the light coming in from the reflection type light valve device; and a light reception device provided for one or more of said polarization beam splitters and configured to detect light emitted from a second face from among faces of the predetermined polarization beam splitter which is opposite to a first face to which the predetermined color light flux from said color separation optical system is introduced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.