Display optical system
US6542204B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 28, 2000 |
| Grant date | Apr 1, 2003 |
| Priority date | — |
| Expiry date | Jan 28, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/7441
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A display optical system has an illumination optical system for emitting illumination light, a plurality of reflection-type display devices, a projection optical system, and a plane-parallel mirror. The reflection-type display devices individually modulate the illumination light emitted from the illumination optical system and reflect the illumination light thus modulated as projection light. The projection optical system projects the projection light and has at least one optical element included therein arranged so as to be decentered with respect to the other optical elements included therein. The plane-parallel mirror separates the illumination light into light components by reflecting a part and transmitting another part of the illumination light and then directs the light components thus separated individually to the corresponding ones of the reflection-type display devices, and integrates together the projection light reflected individually from the reflection-type display devices and then directs the projection light thus integrated together to the projection optical system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.