Illumination device with wake-up function
AssigneeKoninklijke Philips N.V.
InventorRobert Godlieb
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Abstract
An illumination device with wake-up and/or fall-asleep functionality is disclosed. The illumination devices comprises at least one controllable light source; a control device for controlling the light source, wherein in a steady mode, color and intensity of the output light are maintained constant at a steady color value and a steady intensity value and in a wake-up mode, the intensity of the output light is gradually increased from zero to the steady intensity value and in a fall-asleep mode, the intensity of the output light is gradually decreased from the steady intensity value to zero.
Claims20
An illumination device with wake-up functionality capable of outputting light with a gradually increasing intensity, the device comprising:
- a plurality of controllable light sources;
- a user input (UI) receiving a user input signal defining a steady intensity value,
- a control device:
- varying a combined intensity of the plurality of light sources in conformity with a first function of time to reach said inputted steady intensity value;
- and
- concurrently varying a color value of the plurality of light sources in conformity with a second function of time, wherein the color value achieves a steady white color value associated with a maximum steady intensity value independent of said inputted steady intensity value.
An illumination device with a fall-asleep functionality capable of outputting light with a gradually decreasing intensity, the device comprising:
- a plurality of controllable light source;
- a control device:
- varying a combined intensity of the plurality of light sources in conformity with a first function of time to reach a zero intensity value;
- and
- concurrently varying a color value of the plurality of light sources in conformity with second function of time, wherein the color value achieves a steady red color value.
Dependencies are inferred from the claim text.