Illumination apparatus utilizing light emitting diodes
US6689999B2 · kind B2 · utility
20Cited by
10References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 1, 2001 |
| Grant date | Feb 10, 2004 |
| Priority date | — |
| Expiry date | Oct 25, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2201/0626
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A light emitting diode lighting apparatus that includes: a power supply for providing a fixed direct current; a light emitting diode head for emitting light; and a controller for adjusting the level of said light output on said head and compensating for efficiency altering effects of said light in said power head, whereby said controller receives signals for optical feedback stabilization, temperature compensation, and detection of short term current changes to adjust said light and efficiency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.