US Patent No. 10,149,365

RECALIBRATION OF A TUNABLE LAMP SYSTEM


Patent No. 10,149,365
Issue Date December 04, 2018
Title Recalibration Of A Tunable Lamp System
Inventorship Matthew D. Weaver, Aptos, CA (US)
Assignee LUMENETIX, INC., Scotts Valley, CA (US)

Claim of US Patent No. 10,149,365

1. A tunable light module comprising:a memory storing a color mixing plan;
multiple lamps of at least two colors;
a light sensor configured to measure a light characteristic of each lamp of the multiple lamps; and
control circuitry configured to:
drive a lamp of the multiple lamps to produce a colored light according to the color mixing plan that corresponds to a correlated color temperature (CCT);
cause the light sensor to measure the light characteristic of the lamp;
detect a degradation level by comparing the measured light characteristic against an expected light characteristic stored in the memory; and
adjust a current level for driving the lamp at the CCT by referencing the color mixing plan and an alternative coefficient corresponding to the degradation level,
wherein the alternative coefficient is pre-computed, part of the color mixing plan, and stored in the memory, and
wherein the alternative coefficient is associated with the detected degradation level prior to deployment of the tunable light module.