SYSTEMS AND METHODS FOR SECURITY CONTROLLED LED LIGHTING FIXTURE

• US 20100103665A1
• Filed: 10/24/2008
• Published: 04/29/2010
• Est. Priority Date: 10/24/2008
• Status: Active Grant

• Current Assignee: Honeywell International Inc.
• Original Assignee: Honeywell International Inc.
• Inventors: Mubaslat, Saed M., Poling, Mark, Tyson, William III
• Granted Patent: US 8,159,149 B2
• Time in Patent Office: Days
• US Class Current: 362/234
• CPC Class Codes: H05B 45/30 Driver circuits
• CPC Class Codes: H05B 45/50 responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits

Abstract

A secure light emitting diodes (LEDs) power system controls power to a plurality of LEDs residing in a secure LED fixture coupled to a secure LED fixture mounting. An exemplary embodiment provides power to the plurality of LEDs and senses the power provided to the LEDs. In response to sensing the power, an authorization signal is communicated from a security sensor residing in the secure LED fixture. Power to the plurality of LEDs is maintained only in response to the communicated authorization signal.

Claims

1. A method for operating a plurality of light emitting diodes (LEDs) residing in a secure LED fixture coupled to a secure LED fixture mounting, the method comprising:

providing power to the plurality of LEDs;

sensing the power provided to the plurality of LEDs;

in response to sensing the power, communicating an authorization signal from a security sensor residing in the secure LED fixture; and

maintaining power to the plurality of LEDs only in response to communicating the authorization signal.

2. The method of claim 1, wherein a LED driver and controller provides the power to the plurality of LEDs, and further comprising:

receiving the communicated authorization signal by the LED driver and controller, wherein the LED driver and controller maintains the power to the plurality of LEDs only in response to communicating the authorization signal.

3. The method of claim 1, further comprising:

interrupting the power to the plurality of LEDs when the authorization signal is not received.

4. The method of claim 3, wherein the LED driver and controller interrupts the power to the plurality of LEDs when the authorization signal is not received within a predefined period of time.

5. The method of claim 1, further comprising:

controlling a duty cycle of the power provided to the plurality of LEDs based upon the received authorization signal.

6. The method of claim 1, wherein the security sensor residing in the secure LED fixture comprises a Hall effect sensor, and wherein sensing the power provided to the plurality of LEDs comprises:

sensing a change in a magnetic field with the Hall effect sensor; and

communicating the authorization signal when the sensed magnetic field change corresponds to powering the plurality of LEDs.

7. The method of claim 1, wherein the security sensor residing in the secure LED fixture comprises a resistor, and wherein sensing the power provided to the plurality of LEDs comprises:

sensing a change in a voltage of the resistor; and

communicating the authorization signal when the sensed voltage change corresponds to powering the plurality of LEDs.

8. The method of claim 1, wherein communicating the authorization signal from the security sensor comprises:

communicating the authorization signal over a wire.

9. The method of claim 1, wherein communicating the authorization signal from the security sensor comprises:

communicating the authorization signal wirelessly.

10. A secure light emitting diodes (LEDs) power system comprising:

a secure LED fixture with a plurality of LEDs;

a secure LED fixture mounting configured to physically couple to the secure LED fixture;

a LED driver and controller configured to electrically couple the plurality of LEDs to a power source; and

a security sensor residing in the secure LED fixture, wherein the security sensor senses power initially provided to the plurality of LEDs and communicates an authorization signal in response to sensing the power, and wherein power is maintained to the plurality of LEDs only in response to communication of the authorization signal.

11. The LED power system of claim 10, wherein the LED driver and controller receives the authorization signal, and wherein a duty cycle of the power provided to the plurality of LEDs is controlled by the LED driver and controller based upon the received authorization signal.

12. The LED power system of claim 10, further comprising:

a first transceiver communicatively coupled to the security sensor and configured to wirelessly communicate the authorization signal; and

a second transceiver communicatively coupled to the LED driver and controller and configured to receive the wirelessly communicated authorization signal.

13. The LED power system of claim 12, further comprising:

a switch communicatively coupled to the second transceiver, wherein the switch interrupts power to the plurality of LEDs when the authorization signal is not received.

14. The LED power system of claim 10, further comprising:

a switch communicatively coupled to the LED driver and controller, wherein the switch interrupts power to the plurality of LEDs when the authorization signal is not received.

15. The LED power system of claim 10, further comprising:

a switch residing in the secure LED fixture, wherein the switch is communicatively coupled to the security sensor and is electrically coupled to the plurality of LEDs, wherein the switch interrupts power to the plurality of LEDs when the authorization signal is not received.

16. The LED power system of claim 10, further comprising:

a wire connection coupled to the security sensor and the LED driver and controller, wherein the authorization signal is communicated over the wire connection to the LED driver and controller.

17. The LED power system of claim 10, wherein the security sensor residing in the secure LED fixture comprises:

a Hall effect sensor that senses a change in a magnetic field corresponding to the power provided to the plurality of LEDs, wherein the security sensor communicates the authorization signal when the sensed magnetic field change corresponds to initially powering the plurality of LEDs.

18. The LED power system of claim 10, wherein the security sensor residing in the secure LED fixture comprises:

a resistor coupled in series with the plurality of LEDs, wherein the security sensor senses a change in a voltage of the resistor, and wherein the security sensor communicates the authorization signal when the sensed voltage change of the resistor corresponds to initially powering the plurality of LEDs.

19. The LED power system of claim 10, wherein the security sensor residing in the secure LED fixture is a component of the LED driver and controller, and wherein the component comprises at least one selected from a group consisting of a resistor, a transistor, an inductor, and a diode.

20. A LED power system for operating a plurality of light emitting diodes (LEDs) residing in a secure LED fixture coupled to a secure LED fixture mounting, the method comprising:

a means for providing power to the plurality of LEDs;

a means for sensing the power provided to the LEDs;

in response to sensing the power, a means for communicating an authorization signal from a security sensor residing in the secure LED fixture; and

a means for controlling a duty cycle of the power provided to the plurality of LEDs based upon the received authorization signal.