APPARATUS AND METHOD OF OPERATING A LUMINAIRE
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Abstract
An illumination system verifies whether one or more aspects of an output signal provided by a photosensitive transducer fall within a threshold of an expected value for the aspect. The aspect may include a sunrise time, a sunset time, a dawn time, a dusk time, a solar noon time, a solar midnight time, or similar. Upon verification the illumination system uses a microcontroller to adjust one or more output parameters of a solid-state light source responsive to the output signal provided by the photosensitive transducer. Where verification is not possible, the illumination system uses the microcontroller to adjust one or more output parameters of the solid-state light source responsive to a schedule.
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Citations
66 Claims
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1-38. -38. (canceled)
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39. A luminaire, comprising:
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at least one solid state light source; at least one photosensitive transducer responsive to at least one physical characteristic indicative of at least one light condition in an ambient environment; a lamp control subsystem comprising at least one controller and at least one non-transitory processor-readable medium, the lamp control subsystem communicatively coupled to the photosensitive transducer to receive light condition signals indicative of the at least one light condition in the ambient environment sensed by the photosensitive transducer, the lamp control subsystem which; determines an expected time for at least a first daily event, the first daily event associated with a respective first illumination condition in the ambient environment; detects an illumination condition in the ambient environment that matches the first illumination condition; in response to detection of the illumination condition in the ambient environment that matches the first illumination condition, verifies whether a time of detection of the detected illumination condition that matches the first illumination condition is within a threshold of an expected time for the respective first daily event; if verified, controls a supply of power to the at least one solid state light source responsive at least in part to the light condition signals from the photosensitive transducer; and if not verified, controls a supply of power to the at least one solid state light source according to a schedule, and not according to the light condition signals from the photosensitive transducer. - View Dependent Claims (40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52)
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53. A method of controlling the operation of a solid state light source, the method comprising:
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Determining, by the controller, an expected time for at least a first daily event, the first daily event associated with a respective first illumination condition in the ambient environment; detecting an illumination condition in the ambient environment that matches the first illumination condition; in response to detection of the illumination condition in the ambient environment that matches the first illumination condition, verifying, by the controller, whether a time of detection of the detected illumination condition that matches the first illumination condition is within a threshold of an expected time for the respective first daily event; if verified, controlling a supply of power to the at least one solid state light source responsive at least in part to the light condition signals from the photosensitive transducer; and if not verified, controlling a supply of power to the at least one solid state light source according to a schedule, and not according to the light condition signals from the photosensitive transducer. - View Dependent Claims (54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66)
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Specification