COLOR-TUNABLE ILLUMINATION SYSTEM
First Claim
1. A color-tunable illumination system, comprising:
- a first light source,a second light source anda layer of first luminescent material being arranged inside a light mixing chamber having a light exit window for emitting the light therefrom,the first light source and the second light source each comprising at least one light emitting diode and emitting light of a first predefined color into the light mixing chamber,the first luminescent material absorbing light of the first predefined color and converting the absorbed light into light of a second predefined color different from the first predefined color, the first luminescent material being arranged remote from the first light source and the second light source, the first light source being positioned with respect to the first luminescent material for illuminating the first luminescent material with a first relative flux of light being a part of the light emitted by the first light source into the light mixing chamber, the second light source being positioned with respect to the first luminescent material for illuminating the first luminescent material with a second relative flux of light being a part of the light emitted by the second light source into the light mixing chamber, the first relative flux being different from the second relative flux, anda controller for controlling an intensity of the light emitted by the first light source relative to the intensity of the light emitted by the second light source for altering a flux of light of the first predefined color which illuminates the first luminescent material, and/or for controlling a position of the first light source with respect to the luminescent material relative to the position of the second light source with respect to the luminescent material.
4 Assignments
0 Petitions
Accused Products
Abstract
The invention relates to a color-tunable illumination system (10; 12; 14) and a luminaire. The color-tunable illumination system comprises a first light source comprising a first set of light emitting diodes (21, 24), and a second light source comprising a second set of light emitting diodes (31, 37, 34). Both the first and second light source emit light of substantially a first predefined color into a light mixing chamber (60). The light mixing chamber further comprises a first luminescent material (50) converting light of the first predefined color into light of a second predefined color. The first light source is positioned with respect to the first luminescent material for illuminating the first luminescent material with a first flux of light being part of the light emitted by the first light source into the light mixing chamber. The second light source is positioned with respect to the first luminescent material for illuminating the first luminescent material with a second flux of light being part of the light emitted by the second light source into the light mixing chamber. The first flux is different from the second flux. The effect of the measures according to the invention is that a change in the intensity of the light emitted by the first light source relative to the intensity of the light emitted by the second light source results in a change of the color emitted by the color-tunable illumination system.
-
Citations
14 Claims
-
1. A color-tunable illumination system, comprising:
-
a first light source, a second light source and a layer of first luminescent material being arranged inside a light mixing chamber having a light exit window for emitting the light therefrom, the first light source and the second light source each comprising at least one light emitting diode and emitting light of a first predefined color into the light mixing chamber, the first luminescent material absorbing light of the first predefined color and converting the absorbed light into light of a second predefined color different from the first predefined color, the first luminescent material being arranged remote from the first light source and the second light source, the first light source being positioned with respect to the first luminescent material for illuminating the first luminescent material with a first relative flux of light being a part of the light emitted by the first light source into the light mixing chamber, the second light source being positioned with respect to the first luminescent material for illuminating the first luminescent material with a second relative flux of light being a part of the light emitted by the second light source into the light mixing chamber, the first relative flux being different from the second relative flux, and a controller for controlling an intensity of the light emitted by the first light source relative to the intensity of the light emitted by the second light source for altering a flux of light of the first predefined color which illuminates the first luminescent material, and/or for controlling a position of the first light source with respect to the luminescent material relative to the position of the second light source with respect to the luminescent material. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
-
Specification