Method and apparatus for adjusting an ambient light threshold
First Claim
1. An apparatus for controlling power delivered from a power source to an electrical load in a space, the apparatus comprising:
- an actuator;
an occupancy detection circuit for detecting the presence of an occupant in the space;
an ambient light detector for measuring an ambient light level in the space; and
a controller configured to;
control the electrical load in response to actuations of the actuator;
detect the presence of an occupant in the space based on an output received from the occupancy detection circuit;
compare a measured ambient light level received from the ambient light detector to an ambient light level threshold;
determine whether to control the electrical load based on comparing the measured ambient light level to the ambient light level threshold; and
responsive at least in part to detecting the presence of an occupant;
detect whether there is an actuation of the actuator; and
adjust the ambient light level threshold when an actuation of the actuator is detected.
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Accused Products
Abstract
A load control device adapted to be coupled between an AC power source and an electrical load for controlling the power delivered to the load includes a controller, an actuator for turning the electrical load on and off, an occupancy detection circuit, and an ambient light detector. The load control device automatically turns on the electrical load in response to the presence of an occupant only if the detected ambient light is below a predetermined ambient light level threshold. After first detecting the presence of an occupant, the load control device monitors actuations of the actuator to determine whether a user has changed the state of the load. The load control device automatically adjusts the predetermined ambient light level threshold in response to the user actuations that change the state of the load.
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Citations
23 Claims
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1. An apparatus for controlling power delivered from a power source to an electrical load in a space, the apparatus comprising:
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an actuator; an occupancy detection circuit for detecting the presence of an occupant in the space; an ambient light detector for measuring an ambient light level in the space; and a controller configured to; control the electrical load in response to actuations of the actuator; detect the presence of an occupant in the space based on an output received from the occupancy detection circuit; compare a measured ambient light level received from the ambient light detector to an ambient light level threshold; determine whether to control the electrical load based on comparing the measured ambient light level to the ambient light level threshold; and responsive at least in part to detecting the presence of an occupant; detect whether there is an actuation of the actuator; and adjust the ambient light level threshold when an actuation of the actuator is detected. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method for controlling power delivered from a power source to an electrical load, the method comprising:
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detecting an occupancy condition; comparing a measured ambient light level to a first value of an ambient light level threshold; determining whether to control the electrical load based on detecting the occupancy condition and based on comparing the measured ambient light level to the first value of the ambient light level threshold; and
andresponsive at least in part to detecting the occupancy condition; detecting whether there is an actuation to adjust the power delivered to the electrical load; and adjusting the ambient light level threshold to a second value when an actuation to adjust the power delivered to the electrical load is detected. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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Specification