COLOR TUNING OF A MULTI-COLOR LED BASED ILLUMINATION DEVICE

摘要

Multiple colors of light emitted by a light emitting diode (LED) based illumination device (100) are automatically tuned to within a predefined tolerance of multiple target color points by modifying portions of wavelength converting materials associated with each color. A first color of light emitted from the LED based illumination device (100) in response to a first current (185) is measured and a second color of light emitted from the LED based illumination device (100) in response to a second current (184) is measured. A material modification plan to modify wavelength converting materials is determined based at least in part on the measured colors of light and desired colors of light to be emitted. The wavelength converting materials are selectively modified in accordance with the material modification plan so that the LED based illumination device (100) emits colors of light that are within a predetermined tolerance of target color points.