Scanning laser projector with safety system
US8511838B2 · kind B2 · utility
5Cited by
6References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 29, 2011 |
| Grant date | Aug 20, 2013 |
| Priority date | — |
| Expiry date | Dec 29, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B33/06
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A scanning projector includes a MEMS device with a scanning mirror that sweeps a light beam in two dimensions. A laser limit comparison circuit determines a metric from measured peak scan angles and measured light output. The metric is compared to a threshold and a light source is shut down when the metric exceeds the threshold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.