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.
Claims18
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.
A tunable light module, comprising:
- a lamp of a color;
- a memory storing a color mixing plan specifying a driving condition for the lamp to achieve a color characteristic at a particular operational temperature;
- 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 (COT);
- 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 color mixing plan maps operational temperature of the lamp to one or more driving conditions.
A tunable light module, comprising:
- a lamp of a color;
- a memory storing a color mixing plan;
- 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 (COT);
- 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;
- 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;
- generate a spectral profile based on the colored light produced by the lamp as measured by the light sensor;
- and
- transmit the spectral profile to a server across a network.
Dependencies are inferred from the claim text.