Image display apparatus and optical system
US6814442B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 26, 2001 |
| Grant date | Nov 9, 2004 |
| Priority date | — |
| Expiry date | May 3, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2027/0118
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An image display apparatus includes a light source for supplying illumination light, a reflection type display device which reflects the illumination light and modulates the illumination light into image light, and an illumination optical system for guiding the illumination light to the reflection type display device. The illumination optical system includes a first optical member for directing the illumination light toward the reflection type display device, and a second optical member. The second optical member includes a part generating a secondary light source with the illumination light emitted from the light source, in which the light from the part emerges toward the first optical member, and a reflecting surface which guides illumination light which is not incident directly on the part to the part. In addition, a projection optical system guides the image light to an observer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.