Recalibration of a tunable lamp system
AssigneeLumenetix, Inc.
InventorMatthew D. Weaver
Life of this patent
Estimating the term…
Abstract
Some embodiments include a method of operating a tunable light module. The method can include driving a lamp in the tunable light module, having lamps of at least two colors, to produce a colored light according to the color mixing plan that corresponds to a correlated color temperature (CCT); measuring a light characteristic of the lamp using a light sensor; detecting a degradation level by comparing the measured light characteristic against an expected light characteristic; and adjusting 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.
Claims17
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.
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 illumination output by 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);
- monitor a spectral profile based on the colored light produced by the lamp as measured by the light sensor;
- detect a degradation in the lamp based on the spectral profile, wherein, due to the degradation, the tunable light module is unable to produce illumination with the multiple lamps at the CCT that satisfies a set of performance metric constraints of the illumination according to the color mixing plan;
- send the spectral profile to an external device for delivery to a computer server across a network;
- and
- receive an updated color mixing plan from the computer server,
- wherein the tunable light module is able to produce illumination with the multiple lamps at the CCT that satisfies the set of performance metric constraints according to the updated color mixing plan.
A tunable light module able to access a color mixing plan, the tunable light module comprising:
- multiple lamps of at least two colors;
- a light sensor configured to measure brightness of illumination output by each lamp of the multiple lamps;
- and
- control circuitry configured to:
- drive a lamp, without driving other lamps of the multiple lamps if so desired, to produce a colored light according to the color mixing plan that corresponds to a correlated color temperature (CCT);
- cause the light sensor to determine a light characteristic by measuring brightness of the colored light;
- detect a degradation level by comparing the determined light characteristic against an expected light characteristic stored in a 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.
Dependencies are inferred from the claim text.