Patent ID: 8740413
Filing Date: 2014-06-03
Classification: F21K,F21V,F21Y,H01L

Abstract:
1. An optical device comprising: a single submount having a planar surface; a first plurality of radiation sources configured to emit radiation characterized by a first wavelength having a range of about 420 nm to about 470 nm, the first plurality of radiation sources being positioned on the planar surface, the first plurality of radiation sources having n number of radiation sources; a second plurality of radiation sources configured to emit radiation characterized by a second wavelength shorter than the first wavelength, the second plurality of radiation sources being positioned on the planar surface, the second plurality of radiation sources having m number of radiation sources, a ratio between m and n being predetermined based on a selected wavelength; a first wavelength converting layer overlying the planar surface and configured to absorb radiation at the first wavelength emitted by the first plurality of radiation sources and radiation at the second wavelength emitted by the second plurality of radiation sources, the first wavelength converting layer having a wavelength emission ranging from about 590 nm to about 650 nm; a second wavelength converting layer overlying the planar surface and configured to absorb radiation at the first wavelength emitted by the first plurality of radiation sources and radiation at the second wavelength emitted by the second plurality of radiation sources, the second wavelength converting layer having a wavelength emission ranging from about 490 nm to about 650 nm; and a third wavelength converting layer overlying the first plurality of radiation sources and the second plurality of radiation sources mounted on the planar surface of the single submount, the third wavelength converting layer configured to absorb radiation at the second wavelength emitted by the second plurality of radiation sources and not to absorb radiation at the first wavelength emitted by the first plurality of radiation sources, the third wavelength converting layer having a wavelength emission ranging from about 440 nm to about 490 nm.