Wireless lighting devices and applications
First Claim
Patent Images
1. A lighting unit comprising:
- a power input adapted to receive power via a power supply circuit, wherein the power supply circuit receives a supply of AC power through a switch and includes a source of DC power;
at least one light emitting diode (LED) adapted to receive power via the power input;
a sensor configured to generate an output indicative of an impedance associated with the power supply circuit; and
a controller configured to;
determine an operational state of the switch through a plurality of measurements of the sensor output; and
cause DC power to be supplied to the at least one LED from the source of DC power when AC power is not present on the power input and the operational state of the switch indicates that the switch is in a closed or partially closed state, wherein the controller is further configured to;
determine a first impedance value associated with the power supply circuit corresponding to an open operational state of the switch;
determine a second impedance value associated with the power supply circuit corresponding to a closed operational state of the switch;
establish a threshold impedance level based on the first and second impedance values;
determine a third impedance value associated with the power supply circuit, when AC power is not present on the power input; and
cause the DC power to be supplied to the at least one LED from the source of DC power when AC power is not present on the power input and a comparison between the third impedance value and the threshold impedance level indicates that the switch is in a closed state.
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Abstract
In embodiments of the present invention improved capabilities are described for systems and methods that employ a control component and/or power source integrated in an LED based light source to control and/or power the LED light source wirelessly. In embodiments, the LED based light source may take the form of a standard light bulb that plugs into a standard lighting socket or fixture.
319 Citations
30 Claims
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1. A lighting unit comprising:
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a power input adapted to receive power via a power supply circuit, wherein the power supply circuit receives a supply of AC power through a switch and includes a source of DC power; at least one light emitting diode (LED) adapted to receive power via the power input; a sensor configured to generate an output indicative of an impedance associated with the power supply circuit; and
a controller configured to;determine an operational state of the switch through a plurality of measurements of the sensor output; and
cause DC power to be supplied to the at least one LED from the source of DC power when AC power is not present on the power input and the operational state of the switch indicates that the switch is in a closed or partially closed state, wherein the controller is further configured to;determine a first impedance value associated with the power supply circuit corresponding to an open operational state of the switch; determine a second impedance value associated with the power supply circuit corresponding to a closed operational state of the switch; establish a threshold impedance level based on the first and second impedance values;
determine a third impedance value associated with the power supply circuit, when AC power is not present on the power input; andcause the DC power to be supplied to the at least one LED from the source of DC power when AC power is not present on the power input and a comparison between the third impedance value and the threshold impedance level indicates that the switch is in a closed state. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 25, 26, 27)
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17. A lighting unit comprising:
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a power input adapted to receive power via a power supply circuit, wherein the power supply circuit receives a supply of AC power through a switch and includes a source of DC power; at least one light emitting diode (LED) adapted to receive power via the power input;
a sensor configured to generate an output indicative of a resistance, or capacitance associated with the power supply circuit; and
a controller configured to;determine a plurality of resistance or capacitance values associated with the power supply circuit based on the output of the sensor;
determine an operational state of the switch based on the determined plurality of resistance or capacitance values; andcause DC power to be supplied to the at least one LED from the source of DC power when AC power is not present on the power input and the operational state of the switch indicates that the switch is in a closed state, wherein the controller is further configured to;
determine a first resistance or capacitance value associated with the power supply circuit corresponding to an open operational state of the switch;determine a second resistance or capacitance value associated with the power supply circuit corresponding to a closed operational state of the switch; establish a threshold resistance or capacitance level based on the first and second resistance or capacitance values; determine a third resistance or capacitance value associated with the power supply circuit, when AC power is not present on the power input; and cause the DC power to be supplied to the at least one LED from the source of DC power when AC power is not present on the power input and a comparison between the third resistance or capacitance value and the threshold resistance or capacitance level indicates that the switch is in a closed state. - View Dependent Claims (18, 19, 20)
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21. A retrofit lighting fixture comprising:
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a housing configured for installation into a preexisting structure; a power input adapted to receive power via a power supply circuit associated with the preexisting structure, wherein the power supply circuit receives a supply of AC power through a switch; at least one light emitting diode (LED) adapted to receive power via the power input; a source of DC power adapted to selectively provide DC power to the at least one LED; a sensor configured to generate an output indicative of an impedance, resistance, or capacitance associated with the power supply circuit; and a controller configured to; determine an operational state of the switch through a plurality of measurements of the sensor output; and cause DC power to be supplied to the at least one LED from the source of DC power when AC power is not present on the power input and the operational state of the switch indicates that the switch is in a closed state, wherein the controller is further configured to;
determine a first impedance, resistance, or capacitance value associated with the power supply circuit corresponding to an open operational state of the switch;determine a second impedance, resistance, or capacitance value associated with the power supply circuit corresponding to a closed operational state of the switch; establish a threshold impedance, resistance, or capacitance level based on the first and second impedance values; determine a third impedance, resistance, or capacitance value associated with the power supply circuit, when AC power is not present on the power input; and cause the DC power to be supplied to the at least one LED from the source of DC power when AC power is not present on the power input and a comparison between the third impedance, resistance, or capacitance value and the threshold impedance, resistance, or capacitance level indicates that the switch is in a closed state. - View Dependent Claims (22, 23, 24)
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28. A lighting unit comprising:
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a power input adapted to receive power via a power supply circuit, wherein the power supply circuit receives a supply of AC power through a switch and includes a source of DC power; at least one light emitting diode (LED) adapted to receive power via the power input; a sensor configured to generate an output indicative of an impedance associated with the power supply circuit; and
a controller configured to;determine whether AC power is present on the power input; determine an operational state of the switch, when AC power is not present on the power input, through a plurality of measurements of the sensor output; and cause DC power to be supplied to the at least one LED from the source of DC power when AC power is not present on the power input and the operational state of the switch indicates that the switch is in a closed or partially closed state, wherein the controller is further configured to; determine a first impedance value associated with the power supply circuit corresponding to an open operational state of the switch; determine a second impedance value associated with the power supply circuit corresponding to a closed operational state of the switch; establish a threshold impedance level based on the first and second impedance values; determine a third impedance value associated with the power supply circuit, when AC power is not present on the power input; and cause the DC power to be supplied to the at least one LED from the source of DC power when AC power is not present on the power input and a comparison between the third impedance value and the threshold impedance level indicates that the switch is in a closed state. - View Dependent Claims (29, 30)
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Specification