Projection optical system having a curved mirror
US7918562B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 4, 2008 |
| Grant date | Apr 5, 2011 |
| Priority date | — |
| Expiry date | Aug 17, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B21/28
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A projection display device comprises: a light source; liquid crystal panels disposed corresponding to R light, G light and B light; a light guiding optical system for guiding R light, G light and B light among light from the light source to respective corresponding liquid crystal panels; a dichroic prism for synthesizing the R light, G light and B light modulated by the liquid crystal panels; a projection optical system having a curved mirror for enlarging and projecting the light synthesized by the dichroic prism; and a bending mirror. A placement plane for optical members is orthogonal to a projection plane (screen surface), and shorter sides of optical members forming the liquid crystal panels and the light guiding optical system are placed on the placement plane.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.