LED luminaire with electronically adjusted color balance

Details LED luminaire with electronically adjusted color balance LED luminaire with electronically adjusted color balance

1998-12-18

2000-10-03

Philogene, Haissa

Electric lamp and discharge devices: systems

With radiant energy sensitive control means

315312, 315307, 315360, 250205, 250226, H05B 3702

Patent

active

061277835

ABSTRACT:
A white light emitting luminaire includes a plurality of LEDs in each of the colors red, green, and blue with a separate power supply for each color and a photodiode arranged to measure the light output of all the LEDs. The light output of each color is measured by an electronic control circuit which turns off the LEDs for the colors not being measured in a sequence of time pulses. The measured light output for each color is compared to a desired output, which may be determined by user inputs, and corrections to the current for each color are made accordingly.

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patent: 5268828 (1993-12-01), Miura
patent: 5301090 (1994-04-01), Hed
patent: 5471052 (1995-11-01), Ryczek
Patent Abstract of Japan: Publication No.: 10281873, Publication Date Oct. 23, 1997; Application No.: 09083483.
Patent Abstract of Japan: Publication No.: 60216336. Publication Date Oct. 29, 1985; Application No: 59071886.

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