Projector with light source having variable brightness based on detected temperature information
US6886942B2 · kind B2 · utility
137Cited by
9References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 18, 2002 |
| Grant date | May 3, 2005 |
| Priority date | — |
| Expiry date | May 21, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/3155
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A projector changes stepwise electric energy supplied to a light source based on temperature information which is detected by a temperature sensor. The temperature sensor detects the temperature of components of an optical engine or an ambient air temperature. A lamp output control circuit changes stepwise the electric energy supplied to the light source based on the temperature information detected by the temperature sensor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.