Homogenization of an LED array
AssigneeRobe Lighting s.r.o.
InventorsJan Vilem, Tomas David, Josef Valchar
Life of this patent
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Abstract
A luminaire and LED light engine are provided. The luminaire includes the LED light engine and an optical device. The LED light engine includes an LED array and a partial diffuser. The partial diffuser diffuses light that is emitted by LEDs of a selected first subset of LEDs in the LED array and leaves undiffused light that is emitted by LEDs of a second subset of LEDs in the LED array. At least some LEDs are selected for inclusion in the first subset as emitting light that produces poorly blended colors in a light beam emitted by the LED array. The optical device is configured to receive a light beam emitted from the LED light engine and emit a modified light beam.
Claims13
A light-emitting diode (LED) light engine comprising:
- an LED array comprising a plurality of color sets of LEDs, wherein each color set of LEDS emits light of a characteristic color, the characteristic color of each color set different from the characteristic color of the other color sets;
- and
- a partial diffuser, configured to diffuse light emitted from LEDs of a selected first subset of LEDs in the LED array and leave undiffused light emitted from LEDs of a second subset of LEDs in the LED array, wherein the first subset of LEDs comprises LEDs having a first ratio of color sets and the second subset of LEDs comprises LEDs having a second ratio of color sets, the first ratio being different than the second ratio.
A luminaire comprising:
- a light-emitting diode (LED) light engine comprising:
- an LED array comprising a plurality of color sets of LEDs, wherein each color set of LEDS emits light of a characteristic color, the characteristic color of each color set different from the characteristic color of the other color sets;
- and
- a partial diffuser, configured to diffuse light emitted from LEDs of a selected first subset of LEDs in the LED array and leave undiffused light emitted from LEDs of a second subset of LEDs in the LED array, wherein the first subset of LEDs comprises LEDs having a first ratio of color sets and the second subset of LEDs comprises LEDs having a second ratio of color sets, the first ratio being different than the second ratio;
- and
- an optical device configured to receive a light beam comprising light emitted from the LED light engine and emit a modified light beam.
Dependencies are inferred from the claim text.