US 10,462,875 B1 · System and method of dynamic color adjustment

Abstract

A method for controlling a chromaticity of total light provided by a lighting system includes detecting the total light by a sensor system, determining a component of the total light that is attributable to uncontrolled light, and selecting a calibration for a sensor based on the uncontrolled light, and using the calibration to adjust the output of the sensor system. The calibration tables may be based on spectral responsivity of the sensors in the sensor system and calibration functions rather than physical light sources. Relative intensities of controllable light sources having different xy values are then adjusted to cause the total light provided by the lighting system to approximate a target chromaticity. A daylighting system implementing this method includes controllable light sources with different xy values. The intensities of the controllable light sources are adjusted to augment sunlight to control the chromaticity of total light provided by the daylighting system.

Claims20

Dependent claims

A method of controlling chromaticity of total light in a space, comprising:

generating, by a sensor system monitoring a space, a detected light signal comprising a controlled light signal component due to light produced by a plurality of controllable light sources illuminating the space and an uncontrolled light signal component due to light produced by at least one uncontrollable light source not under the control of the lighting system;
isolating the uncontrolled light signal component from the detected light signal based on electrical properties currently being used to control the plurality of controllable light sources;
dynamically calibrating the uncontrolled light signal component using a calibration table that is selected based on the uncontrolled light signal component;
and
adjusting the electrical properties of the plurality of controllable light sources to approximate a target chromaticity based on the calibrated uncontrolled light signal component and the controlled light signal component.

2 more elements

A lighting system, comprising:

a plurality of controllable light sources illuminating a space;
a sensor system configured to generate a detected light signal comprising a controlled light signal component due to light produced by the plurality of controllable light sources and an uncontrolled light signal component due to light produced by at least one uncontrollable light source not under the control of the lighting system;
and
a processor coupled to the plurality of controllable light sources and the sensor system, the processor configured to:
isolate the uncontrolled light signal component from the detected light signal based on electrical properties currently being used to control the plurality of controllable light sources;
dynamically calibrate the uncontrolled light signal component using a calibration table that is selected based on the uncontrolled light signal component;
and
adjust the electrical properties of the plurality of controllable light sources to approximate a target chromaticity based on the calibrated uncontrolled light signal component and the controlled light signal component.

5 more elements

Dependencies are inferred from the claim text.

System and method of dynamic color adjustment

Life of this patent

System and method of dynamic color adjustment

Life of this patent

Abstract

Claims20