Digital projector control method and apparatus
US7036939B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 28, 2003 |
| Grant date | May 2, 2006 |
| Priority date | — |
| Expiry date | Jul 28, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B21/16
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A method and apparatus to control a digital projector. After receiving a turn-on request, the temperature associated with the light source is sensed and compared to a predetermined threshold. If the temperature is below the threshold, then the digital projector's light source is turned on. Otherwise, if the temperature is not below the threshold, the digital projector's cooling device is turned on and the turning on of the light source is delayed until the temperature falls below the threshold. After receiving a turn-off request, the cooling device is turned off coincident with the light source and without regard to the light-source temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.