CALIBRATION OPERATION OF A LIGHTING DEVICE
First Claim
1. A controller comprising:
- an input for receiving a reading from a light sensor representing a sensed light level;
presence detection logic for detecting presence based on a presence sensor, and configured to indicate a set-point to bring at least one lighting device to an operative level in response to a positive detection of presence; and
calibration logic for performing a calibration operation, by causing a light output of the lighting device to change between a first, lower level and a second, higher level, and calibrating the set-point based on the reading from the light sensor under influence of the first and second levels;
wherein the calibration logic is configured to trigger the calibration operation to be performed in response to said positive detection of presence.
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Accused Products
Abstract
A controller comprising: presence detection logic, calibration logic, and an input for receiving a reading from a light sensor representing a sensed light level. The presence detection logic is for detecting presence events based on a presence sensor, and is configured to indicate a set-point to operate at least one lighting device in dependence on a positive detection of presence. The calibration logic is for performing a calibration operation, which is performed by causing a light output of the lighting device to change between a first, lower level and a second, higher level, and by and calibrating the set-point based on the reading from the light sensor under influence of the first and second levels. The calibration logic is configured to trigger this calibration operation in response to the positive detection of presence.
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Citations
15 Claims
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1. A controller comprising:
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an input for receiving a reading from a light sensor representing a sensed light level; presence detection logic for detecting presence based on a presence sensor, and configured to indicate a set-point to bring at least one lighting device to an operative level in response to a positive detection of presence; and calibration logic for performing a calibration operation, by causing a light output of the lighting device to change between a first, lower level and a second, higher level, and calibrating the set-point based on the reading from the light sensor under influence of the first and second levels; wherein the calibration logic is configured to trigger the calibration operation to be performed in response to said positive detection of presence. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 13, 14)
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11. A lighting system comprising a plurality of luminaires, each respective one of the luminaires comprising a respective controller, light sensor, and presence sensor, and the controllers being configured to perform operations of:
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detecting presence events at each of the respective luminaires based on the respective presence sensor; transmitting indications of the presence events between the luminaires; operating the luminaires to emit light in dependence on the presence events; and performing a respective calibration operation to calibrate each of the luminaires, by causing a light output of the respective luminaire to change between a first, lower level and a second, higher level, and taking a reading from the respective light sensor under influence of the first and second levels; wherein each of the respective controllers is operable to trigger the respective calibration operation in response to one of the presence events detected at the respective luminaire, and is operable to trigger the respective calibration operation in response to one of the indications of presence events being received from one or more other of the luminaires; such that one of the presence events detected at a first of the luminaires triggers the respective calibration operations of the first luminaire and one or more of the other luminaires, the respective calibration operations thereby being triggered to be performed at least partially in parallel with one another.
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15. A computer program product for use in controlling at least one lighting device, the computer program product comprising code embodied on a computer readable storage medium and configured so as when executed to perform operations of:
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receiving a reading from a light sensor representing a sensed light level; detecting presence based on a presence sensor; indicating a set-point to bring at least one lighting device to an operative level in response to a positive detection of presence; and triggering a calibration operation to be performed in response to said positive detection of presence, wherein the calibration operation comprises causing a light output of the lighting device to change between a first, lower level and a second, higher level, and calibrating the set-point based on the reading from the light sensor under influence of the first and second levels.
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Specification