Illumination device with white and non-white sources
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United States of America Patent
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Oct 22, 2024
Grant Date -
Feb 16, 2023
app pub date -
Jan 15, 2020
filing date -
Jan 15, 2020
priority date (Note) -
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Abstract
There is presented an illumination device (244) comprising a plurality of light sources (103) emitting light along an optical axis (247); a light collector (241) adapted to collect light from the light sources, wherein the plurality of light sources (103) comprises: A first group (404) of light sources comprising a plurality of light sources, which can be driven to emit white light, a second group (405) of light sources comprising a plurality of light sources which can be driven, such as can only be driven, to emit non-white light (such as green light), wherein the plurality of light sources can be driven so that a total Duv value of light emitted from the illumination device is closer to zero than each of a first Duv value of light emitted from the illumination device originating from the first group (404) of light sources and a second Duv value of light emitted form the illumination device originating from the second group (405) of light sources, and a luminous efficacy of the second group (405) of light sources is higher than a luminous efficacy of the first group (404) of light sources.
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