US Patent No. 9,288,865

EXPERT SYSTEM FOR ESTABLISHING A COLOR MODEL FOR AN LED-BASED LAMP


Patent No. 9,288,865
Issue Date March 15, 2016
Title Expert System For Establishing A Color Model For An Led-based Lamp
Inventorship David Bowers, San Jose, CA (US)
Assignee LUMENETIX, INC., Scotts Valley, CA (US)

Claim of US Patent No. 9,288,865

1. A method comprising:
characterizing a plurality of light-emitting diode (LED) strings experimentally by:
driving each of the LED strings in an LED-based lamp using a configurable driver controller, each of the LED strings comprising
one or more LEDs that are adapted to emit the same color or substantially the same color, and

measuring spectral density functions of the LED strings at defined operating temperatures through defined driver settings
of the configurable driver controller; and

using an color model inference engine implemented in a computer system to develop a color model for the LED-based lamp based
on the measured spectral density functions,

wherein the color model includes driving currents for each of the plurality of LED strings in the LED-based lamp associated
with a correlated color temperature (CCT) for the light generated by the LED-based lamp.