US Pat. No. 10,582,586

ADJUSTABLE WHITE LIGHT ILLUMINATION DEVICES

JUGANU LTD., Rosh Haain ...

1. A lighting device producing white light having a target color correlated temperature (CCT) value, comprising:a plurality of LEDs comprising (i) at least one red LED emitting red light having a wavelength between approximately 600 nm and approximately 670 nm, (ii) at least one warm white LED emitting white light having a CCT value between approximately 1800K and approximately 2700K, and (iii) at least one cool white LED emitting white light having a CCT value between approximately 3000K and approximately 6500K;
at least one photo-luminescent material for shifting at least one of (i) the CCT value of the light emitted from the cool white LED toward a green CCT value or (ii) the CCT value of the light emitted from the warm white 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.

US Pat. No. 10,925,134

ADJUSTABLE WHITE LIGHT ILLUMINATION DEVICES

JUGANU LTD., Rosh Haain ...

1. A lighting device producing white light having a target color correlated temperature (CCT) value, comprising:a plurality of LEDs comprising (i) at least one red LED emitting red light having a wavelength between approximately 600 nm and approximately 670 nm, (ii) at least one warm white LED emitting white light having a CCT value between approximately 1800K and approximately 2700K, and (iii) at least one blue LED emitting blue light having a wavelength between approximately 400 nm and approximately 530 nm;
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 blue LED toward a green CCT value or (ii) the CCT value of the light emitted from at least one said warm white 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.