Variable color luminaire
US5418432A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 24, 1993 |
| Grant date | May 23, 1995 |
| Priority date | — |
| Expiry date | Aug 24, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B47/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A variable color luminaire is arranged for controlling a plurality of light sources of different emission colors to be at predetermined dimming levels by means of dimmers, performing a comparison operation to obtain a quantity-of-light ratio and a reference quantity-of-light ratio from detection signals with respect to light outputs of the light sources detected by detectors, and subjecting the light sources to a quantity-of-light correction by means of a corrector according to results of the comparison operation so as to attain a blended color light as set, whereby the resultant blended color light can be prevented from deviating from the set blended color light even when dimming quantity of the respective light sources is close to upper and lower dimming limits.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.