Projection type image display apparatus
US5760850A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 9, 1996 |
| Grant date | Jun 2, 1998 |
| Priority date | — |
| Expiry date | Feb 9, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/133623
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A projection type color image display apparatus includes: a light source for emitting white light; a first optical element for dividing the white light into a plurality of colored lights and for converging each colored light to form a plurality of spots, the spots of each colored light being formed at different positions from the spots of the other colored light; a liquid crystal display element including a plurality of pixels, the pixels corresponding to the spots and modulating the respective colored lights, whereby an image displayed by the liquid crystal display element is carried by the colored lights; a second optical element for diffracting the colored lights modulated by the liquid crystal display element to make a principal ray of each colored light substantially parallel to a principal ray of the other colored light; and a third optical element for receiving the colored lights from the second optical element and for projecting the image displayed by the liquid crystal display element while the image is enlarged.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.