Light emitting device system comprising a remote control signal receiver and driver

• US 9,591,725 B2
• Filed: 03/15/2010
• Issued: 03/07/2017
• Est. Priority Date: 03/24/2009
• Status: Active Grant

• Current Assignee: Signify Holding B.V. (Signify N.V.)
• Original Assignee: Philips Lighting BV (Koninklijke Philips N.V.)
• Inventors: Radermacher, Harald Josef Gnther
• Primary Examiner(s): Pham, Thai
• Application Number:
  US13/259,165
• Publication Number:
  US 20120091902A1
• Time in Patent Office: 2,549 Days
• Field of Search: 315/149, 315/159, 315/160, 315/227.R, 315/228, 315/246, 315/294, 315/308
• US Class Current: 1/1
• CPC Class Codes: F02G 1/057 Regenerators
• CPC Class Codes: F28D 17/02 using rigid bodies, e.g. of porous material
• CPC Class Codes: H05B 47/19 via wireless transmission
• CPC Class Codes: H05B 47/195 the transmission using visible or infrared light
• CPC Class Codes: Y10T 29/49231 I.C. [internal combustion] engine making

Abstract

The invention relates to a light emitting device system (112) comprising power supply terminals (114) and a remote control signal receiver (118), the power supply terminals being adapted for receiving electrical power from an external driver (100), the remote control signal receiver (118) being adapted for receiving a remote control signal, wherein the light emitting device system (112) is further adapted for providing the received remote control signal as remote control signal information exclusively via the power supply terminals (114) and/or via wireless transmission to the driver (100).

Claims

1. A light emitting device system, comprising:

at least one light emitting device;

power supply terminals connected to receive electrical power from an external driver and to supply the electrical power to the at least one light emitting device;

a remote control signal receiver configured to receive a remote control signal selecting at least one light emission characteristic for the at least one light emitting device; and

a circuit configured to provide via the power supply terminals to the external driver remote control signal information indicating the at least one selected light emission characteristic for the at least one light emitting device.

2. The light emitting device system of claim 1, wherein the remote control signal receiver faces in the direction of an illumination beam path of the light emitting device system.

3. The light emitting device system of claim 2, wherein the remote control signal receiver is spatially located in the illumination beam path of the light emitting device system.

4. The light emitting device system of claim 3, wherein the light emitting device system further comprises an optical lens, wherein the remote control signal receiver is located on the optical axis of said lens.

5. The light emitting device system of claim 1, wherein the circuit comprises an emulation circuit connected to the power supply terminals and configured to provide the remote control signal information via the power supply terminals to the external driver by emulating an electrical load of the light emitting device system.

6. The light emitting device system of claim 5, wherein the power supply terminals are configured to sequentially receive electrical power having a first power characteristic, and electrical power having a second power signal characteristic, wherein the emulation circuit is configured to more closely emulate the electrical load when receiving the electrical power having the second power signal characteristic than when receiving the electrical power having the first power signal characteristic.

7. The light emitting device system of claim 5, wherein the emulation circuit is configured to emulate the electrical load of the light emitting device system with respect to a potential which is different from the potential of the power supply terminals.

8. The light emitting device system of claim 5, wherein the emulation circuit comprises a variable resistance device connected across the power supply terminals, the variable resistance device having a control terminal connected to an output of the remote control signal receiver, wherein the remote control signal receiver changes an impedance of the variable resistance device to communicate to the external driver the remote control signal information indicating the at least one selected light emission characteristic for the at least one light emitting device.

9. The light emitting device system of claim 8, wherein the variable resistance device comprises a transistor connected across the power supply terminals.

10. The light emitting device system of claim 8, further comprising a resonant circuit connected in series with the variable resistance device across the power supply terminals.

11. A method, comprising:

receiving, at power supply terminals of a light emitting device system which includes at least one light emitting device, electrical power from an external driver;

supplying the electrical power from the power supply terminals to the at least one light emitting device;

receiving at the light emitting device system a remote control signal selecting at least one light emission characteristic for the at least one light emitting device; and

providing remote control signal information indicating the at least one selected light emission characteristic for the at least one light emitting device from the light emitting device system to the external driver via at least one of;

(1) the power supply terminals, and (2) wireless transmission.

12. The method of claim 11, including providing via the power supply terminals to the external driver remote control signal information indicating the at least one selected light emission characteristic for the at least one light emitting device.

13. The method of claim 12, wherein the providing via the power supply terminals to the external driver remote control signal information indicating the at least one selected light emission characteristic for the at least one light emitting device includes varying an electrical load of the light emitting device system across the power supply terminals in response to the remote control signal to communicate the remote control signal information to the external driver.

14. The method of claim 13, wherein the varying an electrical load of the light emitting device system in response to the remote control signal includes switching on and off a transistor connected across the power supply terminals to communicate the remote control signal information to the external driver.

15. The method of claim 13, wherein the light emitting device system includes a metal housing wherein varying an electrical load of the light emitting device system in response to the remote control signal includes alternately connecting one of the power supply terminals to the metal housing and disconnecting the one of the power supply terminals to the metal housing.

16. The method of claim 13, wherein the receiving, at the power supply terminals of the light emitting device system, the electrical power from the external driver includes receiving the electrical power at a first frequency in a first time period, and receiving the electrical power at a second frequency in a second time period, wherein the electrical load is varied greater during the second time period in response to the remote control signal than in the first time period to communicate the remote control signal information to the external driver during the second time period.

17. The method of claim 11, including providing via wireless transmission from the light emitting device system to the external driver remote control signal information indicating the at least one selected light emission characteristic for the at least one light emitting device.

18. A method, comprising:

supplying electrical power from a driver to an external light emitting device system via power terminals of the driver;

receiving at the driver, via at least one of;

(1) the power supply terminals and (2) wireless reception, remote control information communicated by the external light emitting device to the driver indicating at least one selected light emission characteristic for at least one light emitting device of the external light emitting device system; and

the driver employing the remote control signal information to control a parameter of the electrical power supplied from the driver to the external light emitting device system to cause the at least one light emitting device of the external lighting emitting device system to provide the at least one selected light emission characteristic.

19. The method of claim 18, including receiving at the driver, via the power supply terminals, the remote control information communicated by the external light emitting device to the driver indicating at least one selected light emission characteristic for at least one light emitting device of the external light emitting device system.

20. The method of claim 19, wherein the receiving at the driver, via the power supply terminals, the remote control information communicated by the external light emitting device to the driver includes detecting changes in an impedance across the power supply terminals presented by the external light emitting device to the driver.