Lighting system for controlling the color temperature of artific

Details Lighting system for controlling the color temperature of artific Lighting system for controlling the color temperature of artific

1997-08-15

1999-01-19

Wong, Don

Electric lamp and discharge devices: systems

With radiant energy sensitive control means

Radiant energy controlled regulation of the current supply...

315154, 250214AL, H05B 3702

Patent

active

058617175

ABSTRACT:
A lighting system having at least one light source for supplying artificial light and a control unit for controlling the light source. The light source is of the type having an adjustable color temperature. The control unit is provided with a control signal form a signal from a signal generator. The signal generator is dependent on the mean daylight level. The control unit is arranged to adjust the color temperature of the light source in dependence on a predetermined relationship between the mean daylight level and the color temperature of the artificial light. The lighting system will provide artificial light which will when the daylight level, as measured on an office desk, increases from approximately 400 lux to approximately 800 lux, increase the color temperature from approximately 3300 K to approximately 4300 K.

REFERENCES:
patent: 4647763 (1987-03-01), Blake
patent: 4701669 (1987-10-01), Head et al.
patent: 5019747 (1991-05-01), Morita et al.
patent: 5250799 (1993-10-01), Werner
patent: 5262701 (1993-11-01), Derra et al.
patent: 5357170 (1994-10-01), Luchaco et al.
patent: 5721471 (1998-02-01), Begemann et al.

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