Multiwavelength smoke detector using white light LED
US7474227B2 · kind B2 · utility
16Cited by
15References
36Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 26, 2007 |
| Grant date | Jan 6, 2009 |
| Priority date | — |
| Expiry date | Apr 26, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B17/107
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A smoke detector includes a smoke detection chamber containing a white light LED and a light detector. The light detector detects light within at least two distinct optical wavelength bands, and generates respective signals indicative of the intensities of the detected light. An analyzer determines, based on the measured light intensities of the different wavelength bands, whether a dangerous smoke/fire condition is present.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.