TUNABLE CORRELATED COLOR TEMPERATURE LED-BASED WHITE LIGHT SOURCE WITH MIXING CHAMBER AND REMOTE PHOSPHOR EXIT WINDOW

摘要

A light source (600) includes: a plurality of LEDs (610), including one or more first LEDs (612) configured to emit first light having a first color, one or more second LEDs (614) configured to emit second light having a second color, and one or more third LEDs (616) configured to emit third light having a third color; a mixing device (620) configured to mix the first light, the second light, and the third light into a mixed light, wherein the mixing device includes an exit window (640) configured such that the mixed light is emitted from the mixing device through the exit window; and a light-conversion material (6300 provided at the exit window, wherein the light-conversion material is configured to convert the first light from the first color to a lime color.

主权项

1. A lighting unit including an LED-based light source, the LED-based light source comprising:
a plurality of light-emitting diodes (LEDs), including at least one white LED, at least one blue LED and at least one red or red or red-orange LED; with a difference in the dominant or primary wavelengths of a blue component of the white light from the first LED and the blue light from the second LED; a mixing device configured to mix light output by the plurality of LEDs, wherein the mixing device includes an exit window configured such that the mixed light is emitted from the mixing device through the exit window; a light-conversion material provided at the exit window, wherein the light-conversion material is configured to convert light emitted from the at least one white LED to have a lime color; a lighting controller configured to adjust a correlated color temperature of the LED-based light source by adjusting relative current levels provided to the at least one white LED, the at least one blue LED, and the at least one red LED.