Variable color luminaire

Details Variable color luminaire Variable color luminaire

1993-08-24

1995-05-23

Pascal, Robert J.

Electric lamp and discharge devices: systems

With radiant energy sensitive control means

Load device irradiating the radiant energy responsive device

315152, 315158, 315307, 315317, 250205, H05B 3702

Patent

active

054184320

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.

REFERENCES:
patent: 3800185 (1974-03-01), Anton et al.
patent: 4037565 (1989-06-01), White
patent: 4273999 (1989-06-01), Pierpoint
Microelectronics: Digital and Analog Circuits and Systems, Millman, Jacob, Ph.D. McGraw-Hill (1979) pp. 571-572, 574, 592, 593.

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