Adjustable white light illumination devices
OwnerNoam Meirinventor
Life of this patent
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Abstract
A lighting device producing white light having a target color correlated temperature (CCT) value includes an LED array having one or more red LEDs, one or more warm white LEDs, and one or more cool white LED; one or more photo-luminescent materials for shifting the CCT value of the light emitted from the cool white LED toward a green CCT value and/or the CCT value of the light emitted from the warm white LED toward a yellow CCT value; and a waveguide material having a mixing region for mixing the shifted and unshifted light so as to generate white light having the target CCT value and an output region for outputting the white light.
Claims21
A lighting device producing white light having a target color correlated temperature (CCT) value, the lighting device comprising:
- a plurality of LEDs comprising (i) at least one first LED producing white light having a CCT value between approximately 3000K and approximately 6500K, and (ii) one or more second LEDs each producing (a) blue light having a wavelength between approximately 400 nm and approximately 530 nm, (b) UV light having a wavelength between approximately 100 nm and approximately 400 nm, or (c) white light having a CCT value between approximately 1800K and approximately 2700K;
- at least one photo-luminescent material for shifting at least one of (i) the CCT value of the light emitted from at least one said first LED toward a green CCT value or (ii) the CCT value of the light emitted from at least one said second LED toward a yellow CCT value;
- and
- a waveguide material having (i) a mixing region for mixing the shifted and unshifted light so as to generate white light having the target CCT value and (ii) an output region for outputting the white light.
Dependencies are inferred from the claim text.