EFFICIENT LED-BASED ILLUMINATION MODULES WITH HIGH COLOR RENDERING INDEX

摘要

The illumination module 100 includes an optically uncoupled cavity 109 having an output window 108 and an inner surface area 104, 106, 110 that are physically separated from the LED 102. A portion of the output window 108 is coated with a first wavelength conversion material and a portion of the inner surface region 104, 106, 110 is coated with a second wavelength conversion material. The output window 108 may be coated with LuAG: Ce. The output window 108 may also be coated with a third wavelength converting material having a peak emission wavelength at 615-655 nm, wherein the spectral response of the light emitted from the output window 108 is within 20% of the black body of the same CCT. The LED 102 may emit light that is converted by the light mixing cavity 109 with a color conversion efficiency ratio greater than 130 lm / W, where the light mixing cavity 109 has a peak at 508 to 528 nm and a peak at 615 to 655 nm And includes two phosphorescent materials having an emission wavelength.