LIGHTING DEVICE
First Claim
1. A lighting control apparatus comprising:
- a primary input power connection for connection to a primary power supply;
a secondary input power connection for receiving secondary power from a secondary power supply; and
electronic circuitry arranged to control power delivery to one or more lighting devices;
wherein the electronic circuitry comprises;
control circuitry for controlling delivery of power from said input power connections to one or more light sources; and
sensing circuitry configured to sense an external impedance coupled, in use, to the primary input power connection; and
wherein the control circuitry is arranged to determine a present operating state of the one or more light sources; and
wherein the control circuitry is arranged to control delivery of power to the one or more light sources in dependence upon the sensed impedance measure and the determined operating state of the one or more light sources.
1 Assignment
0 Petitions
Accused Products
Abstract
A lighting control includes a primary and a secondary input power connection for connection to a primary (mains) and a secondary (battery) power supply respectively, control circuitry for controlling delivery of power from the input power connections to one or more light sources, sensing circuitry configured to sense an external impedance coupled, in use, to the primary input power connection and a controller for determining a present operating state of the one or more light sources. The controller includes a latching module adapted to maintain a state information indicating the present operating state of the one or more light sources. The control circuitry is operable to control delivery of power to the one or more light sources in dependence upon the sensed impedance measure and the determined operating state. The lighting devices may be installed in a conventional lighting circuit that uses momentary toggle switches.
35 Citations
25 Claims
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1. A lighting control apparatus comprising:
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a primary input power connection for connection to a primary power supply; a secondary input power connection for receiving secondary power from a secondary power supply; and electronic circuitry arranged to control power delivery to one or more lighting devices; wherein the electronic circuitry comprises; control circuitry for controlling delivery of power from said input power connections to one or more light sources; and sensing circuitry configured to sense an external impedance coupled, in use, to the primary input power connection; and wherein the control circuitry is arranged to determine a present operating state of the one or more light sources; and wherein the control circuitry is arranged to control delivery of power to the one or more light sources in dependence upon the sensed impedance measure and the determined operating state of the one or more light sources. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A method of controlling power delivery to one or more light sources using a control apparatus, the method comprising:
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connecting a primary input power connection to a primary power supply; connecting a secondary input power connection to a secondary power supply; sensing an external impedance coupled to the primary input power connection; determining a present operating state of the one or more light sources; and controlling delivery of power to the one or more light sources in dependence upon the sensed impedance and the determined operating state of the one or more light sources.
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Specification