Systems and methods for controlling light sources

摘要

A system for controlling a set of light sources may include a set of light sources, at least one optical conduit arranged relative to the set of light sources so as to collect excess light from the set of light sources, and at least one sensor coupled to the optical conduit and configured to sense light collected by the optical conduit. The system may also include a controller configured to control the emittance of the set of light sources based on the light sensed by the sensor. A method for controlling a set of light sources may comprise individually varying power supplied to at least some of the light sources in an imperceptible manner, sensing light emitted by a light source for which the power has been varied, and controlling the emittance of the set of light sources based on the sensed light.

主权项

1. A method for controlling light output of an array comprising a plurality of series-connected of light sources by a controller while maintaining a desired operating emittance of the array, each light of the array having a shunt switch, the method comprising:
energizing the array of series-connected plurality of light sources by applying a current necessary to generate for the desired operating emittance; during a first time period, closing the shunt switch of a light source of the plurality of light sources, wherein the light source is extinguished; sampling the remaining light of the array by an optical sensor during the first time period and during a second time period when the shunt switch is de-energized; determining a difference in emittance between the first and second time periods; comparing the difference in emittance to a luminance value stored in a memory associated with the shunted light source; and subsequently controlling the operation of the shunt switch based on the comparison, wherein the subsequent controlling produces the desired operating emittance of the array.