LED LIGHTING DEVICES

• US 20130200810A1
• Filed: 05/09/2011
• Published: 08/08/2013
• Est. Priority Date: 05/10/2010
• Status: Active Grant

• Current Assignee: Maxgreen LED Limited
• Original Assignee: Maxgreen Limited
• Inventors: Foti, Ivan
• Granted Patent: US 9,030,102 B2
• Time in Patent Office: Days
• US Class Current: 315/158
• CPC Class Codes: H05B 45/12 using optical feedback
• CPC Class Codes: H05B 47/185 via power line carrier transmission

Abstract

A lighting device includes an LED light source (20) operable by electric power supplied to the device, and a control system (23) receiving electric power from an external power supply (26) and supplying power to the light source (20). The control system (23) also being operable of operating in a second mode to supply power to the light source (20) only on receipt by the control system (23) via the power supply (26) of a signal identifying said device. Thus the device (24) can be incorporated in a conventional lighting circuit or a circuit in which the devices (24) are individually controlled.

Claims

1. A lighting device including an LED light source operable by electric power supplied to the device, and a control system receiving electric power from an external power supply and supplying power to the light source, the control system also being operable to supply power to the light source only on receipt by the control system via the power supply of a signal identifying said device.

2. A device according to claim 1 wherein, on receipt of said control signal, the control system acts as a switch to control the supply of electrical power to the light source.

3. A device according to claim 1 wherein the control signal includes information identifying the amount of power to be supplied to the light source and hence the brightness of the light source, the control system, on receipt of said signal, allowing said amount of power to pass to the light source.

4. A device according to claim 1 in combination with a sensor, the sensor, on operation, producing a sensor signal received by the control system, the control system passing power to the light source on receipt of the sensor signal.

5. A device according to claim 4 wherein the sensor is one of:

an ambient light sensor, a passive infra-red detector, a Doppler radar detector, a smoke alarm, a burglar alarm.

6. A device according to claim 1 wherein the control system is a microprocessor.

7. A device according to claim 1 wherein the control system produces an identifier signal identifying the lighting device and for use in the generation of said control signal.

8. A device according to claim 1 and including a connector for connecting the lighting device to a lighting circuit.

9. A device according to claim 1 in a lighting circuit together with a controller, the controller generating said control signal.

10. A device according to claim 9 wherein the control signal is a digital signal.

12. A device according to claim 9 wherein the controller is programmable to produce said control signal at a predetermined time.

13. A device according to claim 9 wherein the controller receives said identifier signal and stores said signal for use in generating said control signal.

14. A device according to claim 9 wherein the control system produces a signal on detection of a fault with the associated device, said fault signal being transmitted to the controller together with said identifier signal.

15. A device according to claim 9 and forming one of a plurality of said devices in said lighting circuit, the controller controlling all the lighting devices in said circuit.

16. A device according to claim 15 wherein the controller is programmable to generate control signals for a selected number of said plurality of lighting devices on receipt of an input signal thereto.

17. A device according to claim 16 wherein the input signal is generated by manual operation of a switch connected to the controller.

19. A device according to claim 10 wherein, on receipt of said control signal, the control system acts as a switch to control the supply of electrical power to the light source and wherein the control signal is in the form of a packet, a first part of the packet identifying the lighting device and a second part of the packet controlling the control system.

11. (canceled)

18. A device according to claim 18 wherein the controller is programmable to generate control signals for a first selected number of said lighting devices on receipt of a first input signal thereto and to generate control signals for a second selected number of said lighting devices on receipt of a second input signal thereto, the first and second input signals being generated by respective switches.