Apparatus and method for switch state detection and controlling electrical power
First Claim
1. A lighting device comprising:
- a main power connection configured to receive power from a main power source under normal conditions;
a battery;
a lighting circuit including a plurality of lights connected on a load side of a switch connecting the main power connection to the main power source, the lighting circuit being powered by the main power source in a normal condition when power from the main power source is present and the switch is closed, and being powered from the battery when power from the main power source is absent and the switch is closed; and
circuitry configured toconvert, via powering through a bridge rectifier, an incompatible light into a compatible light, the powering including supplying a ramped voltage to the incompatible light,measure a temperature of the battery,generate, based on a temperature threshold, a control signal to maintain the temperature of the battery below the temperature threshold,determine, based on an input from the switch, when the power from the main power source is absent, andoutput, based on the main power source being absent, a test signal at the main power connection,wherein the lighting, circuit connected on the load side of the switch appears as a substantially open circuit to the test signal.
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Abstract
A device includes a connection receiving power from a power source under normal conditions and circuitry configured to determine, based on an input from the connection, when the power from the power source is absent; output, when the power source is absent, a test signal at the connection; and generate a detection signal based on current flow generated following the output of the test signal, wherein the detection signal indicates a position of a switch connecting the circuitry to the connection and the generated detection signal indicates the switch is closed when the current flow is above a threshold. The circuitry is configured such that when the power from the power source is absent, the switch is closed, and plural devices are connected on the supply side of the switch, the plurality of devices on the supply side appear as a substantially open circuit to the test signal.
28 Citations
18 Claims
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1. A lighting device comprising:
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a main power connection configured to receive power from a main power source under normal conditions; a battery; a lighting circuit including a plurality of lights connected on a load side of a switch connecting the main power connection to the main power source, the lighting circuit being powered by the main power source in a normal condition when power from the main power source is present and the switch is closed, and being powered from the battery when power from the main power source is absent and the switch is closed; and circuitry configured to convert, via powering through a bridge rectifier, an incompatible light into a compatible light, the powering including supplying a ramped voltage to the incompatible light, measure a temperature of the battery, generate, based on a temperature threshold, a control signal to maintain the temperature of the battery below the temperature threshold, determine, based on an input from the switch, when the power from the main power source is absent, and output, based on the main power source being absent, a test signal at the main power connection, wherein the lighting, circuit connected on the load side of the switch appears as a substantially open circuit to the test signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of operating a lighting device, the method comprising:
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determining, using circuitry, a source of power for a lighting circuit of the lighting device, the lighting circuit including a plurality of lights connected on a load side of a switch that connects a main power connection to a main power source, the source of power being one of the main power source and a battery each when the switch is closed; converting, via powering through a bridge rectifier, an incompatible light into a compatible light, the powering including supplying a ramped voltage to the incompatible light; measuring by circuitry, a temperature of the battery; generating, based on a temperature threshold, a control signal to maintain the temperature of the battery below the temperature threshold; determining, based on an input from the switch, when the power from the main power source is absent; and outputting, based on the main power source being absent, a test signal at the main power connection, wherein the lighting circuit connected on the load side of the switch appears as a substantially open circuit to the test signal. - View Dependent Claims (13, 14, 15, 16)
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17. A light socket comprising:
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a socket interface configured to electrically connect with a light bulb; a battery; and circuitry configured to; convert, via powering through a bridge rectifier, an incompatible light bulb into a compatible light bulb, the powering including supplying a ramped voltage to the incompatible light, control power to the socket interface via a switch connected to the socket interface and a main power source, wherein when power from the main power source is available and the switch is closed, the circuitry controls the power such that the switch passes current from the main power source to the light bulb, and when power from the main power source is absent and the switch is closed, the circuitry controls the power such that the circuitry passes current from the battery to one of the light bulb and a lighting circuit based on a position of the switch being closed, determine, based on an input from a main power connection, when the power from the main power source is absent, and output, based on the main power source being absent, a test signal at the main power connection, wherein a plurality of devices connected on a load side of a switch connecting the main power connection to the main power source, appear as a substantially open circuit. - View Dependent Claims (18)
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Specification