Illumination Device and Method for Calibrating an Illumination Device Over Changes in Temperature, Drive Current, and Time

A light-emitting diode (LED) lighting control method, comprising:

• at each of a plurality of ambient temperatures:
• causing, by LED lighting controller control circuitry, a sequential application of each of a plurality of drive currents to one of a plurality of LED emitters while maintaining the remaining plurality of LED emitters in a non-illuminated condition;
• receiving, by the LED lighting controller control circuitry, data representative of one or more optical measurements at each of the plurality of drive currents;
• receiving, by the LED lighting controller control circuitry, data representative of one or more electrical measurements from one or more operatively coupled photodetectors at each of the plurality of drive currents;
• determining, by the LED lighting controller control circuitry, at least one LED emitter operating temperature dependent relationship between the optical output parameters of the respective LED emitter and the drive current applied to the respective LED emitter using the received data representative of the one or more optical measurements and the received data representative of the one or more electrical measurements;
• and
• causing, by the LED lighting controller control circuitry, a storage of data representative of the determined at least one LED emitter operating temperature dependent relationship in operatively coupled memory circuitry.

A non-transitory, machine-readable, storage device that includes instructions that, when executed by light-emitting diode (LED) lighting controller control circuitry, causes the control circuitry to:

• at each of a plurality of ambient temperatures:
• cause a sequential application of each of a plurality of drive currents to one of a plurality of LED emitters while maintaining the remaining plurality of LED emitters in a non-illuminated condition;
• receive data representative of one or more optical measurements at each of the plurality of drive currents;
• receive data representative of one or more electrical measurements from one or more operatively coupled photodetectors at each of the plurality of drive currents;
• determine at least one LED emitter operating temperature dependent relationship between the optical output parameters of the respective LED emitter and the drive current applied to the respective LED emitter using the received data representative of the one or more optical measurements and the received data representative of the one or more electrical measurements;
• and
• cause a storage of data representative of the determined at least one LED emitter operating temperature dependent relationship in operatively coupled memory circuitry.