US Patent No. 10,772,174

RECALIBRATION OF A TUNABLE LAMP SYSTEM


Patent No. 10,772,174
Issue Date September 08, 2020
Title Recalibration Of A Tunable Lamp System
Inventorship Matthew D. Weaver, Aptos, CA (US)
Assignee Lumenetix, LLC, Scotts Valley, CA (US)

Claim of US Patent No. 10,772,174

1. A tunable light module, comprising:a memory storing a color mixing plan;
a lamp of a color;
a light sensor configured to measure a light characteristic of the lamp; and
control circuitry configured to:
drive the lamp 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 a light characteristic of the lamp;
detect a degradation level by comparing the measured light characteristic against an expected light characteristic stored in the memory, the expected light characteristic being part of the color mixing plan;
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; and
in response to determining that the detected degradation level has no pre-computed alternative coefficient saved in the memory, interpolate between alternative coefficients associated with nearby degradation levels proximate to the detected degradation level to derive the alternative coefficient used to adjust the current level,
wherein the color mixing plan specifies a driving condition for the lamp to achieve a color characteristic at a particular operational temperature.