Illumination system for color displays
US5889567A · kind A · utility
169Cited by
36References
28Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Nov 30, 1995 |
| Grant date | Mar 30, 1999 |
| Priority date | — |
| Expiry date | Nov 30, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S359/90
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Binary optics are used in an illumination system for a color projection display. In one embodiment a broad spectrum light source illuminates a multilevel optical phase element which disperses the broad spectrum light from the light source by diffraction. A display having a number of pixel elements, each capable of transmitting a predetermined spectral region, is positioned within the near field region of the multilevel optical phase element so as to receive the light dispersed by the multilevel phase element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.