EFFICIENT LED-BASED ILLUMINATION MODULES WITH HIGH COLOR RENDERING INDEX

摘要

An illumination module emits light from at least one light emitting diode (LED) with a peak wavelength between 380 nanometers and 460 nanometers that is converted to a second colored light by interaction with at least four different photo-luminescent materials in a light conversion sub-assembly. A first photo-luminescent material has a peak emission at a wavelength that is within 55 nanometers of the peak wavelength of the light emitted from the LED. A second photo-luminescent material has a peak emission at a wavelength greater than 650 nanometers. A third photo-luminescent material has a peak emission at a wavelength that is more than 20 nanometers greater than the peak emission wavelength of the first photo-luminescent material. A fourth photo-luminescent material has a peak emission at a wavelength that is at least 20 nanometers less than the second photo-luminescent material.

主权项

1. An light emitting diode (LED) based illumination device comprising:
a light source sub-assembly comprising at least one LED operable to emit a first colored light characterized by an emission spectrum with a peak wavelength between 380 nanometers and 460 nanometers; and a light conversion sub-assembly operable to convert the first colored light to a second colored light emitted from the light conversion sub-assembly, wherein the light conversion sub-assembly includes a first photo-luminescent material characterized by an emission spectrum with a peak wavelength within 55 nanometers of the peak wavelength of the first colored light, a second photo-luminescent material with a peak emission wavelength greater than 650 nanometers, a third photo-luminescent material with a peak emission wavelength more than 20 nanometers greater than the peak wavelength of the first photo-luminescent material, and a fourth photo-luminescent material with a peak emission wavelength at least 20 nanometers less than the second photo-luminescent material.