Patent ID: 9585224
Date: 2017-02-28
CPC Classifications: F21K,F21V,F21Y,G01J,H01L,H05B,Y10T

Claim:
1. A method comprising: measuring a first color of light emitted from an LED based illumination device in response to a first current supplied to a first LED configured to receive the first current, wherein light emitted from the first LED illuminates a first amount of a first wavelength converting material; measuring a second color of light emitted from the LED based illumination device in response to a second current supplied to a second LED configured to receive the second current, wherein light emitted from the second LED illuminates a second amount of a second wavelength converting material; and determining a material modification plan based at least in part on the first color of light and the second color of light that includes a modification of the first amount of the first wavelength converting material, wherein the LED based illumination device, modified in accordance with the material modification plan, emits a third color of light in response to the first current within a predetermined tolerance of a first target color point.