Image display apparatus and optical system
US6594085B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 26, 2001 |
| Grant date | Jul 15, 2003 |
| Priority date | — |
| Expiry date | May 9, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B5/30
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An image display apparatus includes a light source for supplying illumination light, a reflection type display element for modulating the illumination light into image light by reflecting the light, an illumination optical system for guiding the illumination light to the reflection type display element, and a projection optical system for guiding the image light to an observer. The image light is incident on the projection optical system via at least a portion of the illumination optical system. The illumination optical system has a part, in an area where both the illumination light and the image light pass, which changes an optical action depending on a state of incident light. The part acts to deflect the illumination light to decrease an incident angle with respect to the reflection type display element as compared with a case where the part does not exist.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.