Image display device
US6636274B1 · kind B1 · utility
19Cited by
16References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 10, 1999 |
| Grant date | Oct 21, 2003 |
| Priority date | — |
| Expiry date | Aug 10, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/3129
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
When an anomaly occurred in an optical system or light sources of a rear projection TV in which laser beams are employed as a light source, the anomaly is detected by sensors, the detected anomaly is transmitted to a microcomputer, and according to a signal from the microcomputer a laser light source control portion controls the laser beams from the laser light sources so as to stop or decrease generation of the laser beams. Thereby, danger is prevented in advance from being afflicted on a viewer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.