Method for controlling the luminous flux spectrum of a lighting fixture
US7023543B2 · kind B2 · utility
42Cited by
4References
23Claims
0Family size
Inventor
Key dates
| Filing date | Aug 1, 2002 |
| Grant date | Apr 4, 2006 |
| Priority date | — |
| Expiry date | Aug 1, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B45/28
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method is disclosed for controlling a lighting fixture of a kind having individually colored light sources, e.g., LEDs, that emit light having a distinct luminous flux spectrum that varies in its initial spectral composition, that varies with temperature, and that degrades over time. The method controls such fixture so that it projects light having a predetermined desired flux spectrum despite variations in initial spectral characteristics, despite variations in temperature, and despite flux degradations over time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.