Light sources that increase object chroma when dimmed
AssigneeThe Penn State Research Foundation
InventorKevin Houser
Life of this patent
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Abstract
A method of increasing the color gamut of a multi-emitter light emitting device when dimming includes the steps of independently driving each emitter in the device, and increasing the lumen output of at least one emitter while simultaneously decreasing the lumen output of at least one other emitter, such that total color gamut increases while total lumen output of the light emitting device decreases. A light emitting device is also disclosed.
Claims36
A method of increasing the color gamut of objects illuminated by a multi-emitter light emitting device when dimming, comprising:
- independently driving each emitter in the device;
- and
- increasing the lumen output of at least one emitter while simultaneously decreasing the lumen output of at least one other emitter, such that total color gamut increases while total lumen output of the light emitting device decreases.
A light emitting device comprising:
- at least 2 LED emitters;
- at least one internal controller;
- a plurality of driver circuits configured to independently drive the plurality of LED emitters via the at least one internal controller;
- and
- programming logic configured to increase the lumen output of at least one emitter while simultaneously decreasing the lumen output of at least one other emitter, such that total color gamut of objects illuminated by the light emitting device increases while total lumen output of the light emitting device decreases.
A light emitting device comprising:
- at least 2 LED emitters;
- and
- a plurality of driver circuits configured to independently drive the plurality of LED emitters;
- wherein the light emitting device emits light at a first fixed output level, the output level having a lower total lumen output than would be emitted if all the LED emitters were driven equally;
- and
- wherein objects illuminated by the light emitting device have a higher color gamut than if all the LED emitters were driven equally.
Dependencies are inferred from the claim text.