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AssigneeU.S. Philips Corporation
InventorsSimon H. A. Begemann, Ariadne D. Tenner, Gerrit J. Van Den Beld
Estimating the term…
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 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.
A lighting system, comprising at least one light source for supplying artificial light and a control unit for controlling the light source, the control unit comprising means for forming a control signal which is dependent on a daylight level, wherein the light source is of the type having an adjustable colour temperature, the control unit responsive to the control signal adjusts the colour temperature of the light source in dependence on a predetermined relationship between the daylight level and the colour temperature of the artificial light and wherein the means for forming the control signal comprises a day calendar unit for determining the day of a year and is arranged to form the control signal in dependence on a predetermined relationship between the day of the year and a mean daylight level.
A lighting system, comprising at least one light source for supplying artificial light and a control unit for controlling the light source, the control unit comprising means for forming a control signal which is dependent on a daylight level, wherein the light source is of the type having an adjustable colour temperature, the control unit responsive to the control signal adjusts the colour temperature of the light source in dependence on a predetermined relationship between the daylight level and the colour temperature of the artificial light and wherein the control unit stores at least two different, predetermined relationships between the daylight level and the colour temperature, and that the control unit comprises a selector which is arranged to select one of said relationships.
A device for controlling a light source having an adjustable colour temperature comprising:
A device for controlling a light source having an adjustable colour temperature comprising:
A method for controlling at least one light source, comprising:
Dependencies are inferred from the claim text.