Expert system for establishing a color model for an LED-based lamp

摘要

Systems and methods for using an expert system to develop a color model for and LED-based lamp for reproducing a target light and calibrating the lamp are disclosed. The CCT of light generated by the lamp is tunable by adjusting the amount of light contributed by each of the LED strings in the lamp. The target light is decomposed into different wavelength bands, and light generated by the LED-based lamp is also decomposed into the same wavelength bands and compared. A color model for the lamp provides information on how hard to drive each LED string in the lamp to generate light over a range of CCTs, and the color model is used to search for the appropriate operating point of the lamp to reproduce the target light.

主权项

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, andmeasuring 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.