Projection display having a high reliability illumination system
US6666896B1 · kind B1 · utility
11Cited by
3References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 9, 2002 |
| Grant date | Dec 23, 2003 |
| Priority date | — |
| Expiry date | Sep 9, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/74
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A projection display has a display screen for displaying images formed by image engines illuminated by a high-reliability illumination source. The illumination source contains lamps for illumination of the image engines. Optical components conduct the light from the lamps to the image engines such that when a lamp fails illumination is maintained on the display screen by varying the power to the remaining lamps. A lamp power controller senses failure of a lamp and varies the power to the remaining lamps to compensate for the lamp failure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.