Constant temperature light emitting diode lighting system

• US 8,643,285 B2
• Filed: 01/14/2012
• Issued: 02/04/2014
• Est. Priority Date: 01/14/2012
• Status: Expired due to Fees

• Current Assignee: Yang Pan
• Original Assignee: Yang Pan
• Inventors: Pan, Yang
• Primary Examiner(s): Hammond, Crystal L
• Application Number:
  US13/350,772
• Publication Number:
  US 20130181611A1
• Time in Patent Office: 752 Days
• Field of Search: None
• US Class Current: 315/151
• CPC Class Codes: H05B 45/18 using temperature feedback

Abstract

A power management system for a lighting system including at least one lighting emitting diode is disclosed. In one embodiment, the light emitting diode(s) of the lighting system are operated under a constant temperature. In another embodiment, the light emitting diode(s) of the lighting system are operated under a constant temperature difference to the ambient temperature. A thermal feedback loop is employed to achieve the constant temperature or the constant temperature difference.

Claims

1. A light emitting diode lighting system comprising:

(a) at least one light emitting diode;

(b) a power supply; and

(c) a closed feedback loop connected between an output and a first input of a comparator pertaining to controlling operating temperature of said light emitting diode to oscillator around a predetermined value, said first input is coupled to an output of a temperature sensor pertaining to measuring temperature of said light emitting diode, said predetermined value is set by a second input of the comparator, said second input is coupled to an ambient temperature sensor.

2. The system as recited in claim 1, wherein said temperature sensor is a part of said light emitting diode.

3. The system as recited in claim 1, wherein said temperature sensor is integrated in a single chip as said light emitting diode.

4. The system as recited in claim 1, wherein said temperature sensor is placed in proximity of said light emitting diode.

5. The system as recited in claim 1, wherein said temperature sensor comprises an infrared sensor.

6. The system as recited in claim 1, wherein the output of the comparator is coupled to a power modulator including a pulse width modulator that modulates an incoming DC power before the power is delivered to power said light emitting diode.

7. The system as recited in claim 1, wherein the output of the comparator is coupled to a power modulator including a bit stream modulator that modulates an incoming DC power before the power is delivered to power said light emitting diode.

8. The system as recited in claim 1, wherein the output of the comparator is coupled to a secondary winding of a power transformer through a switch, wherein said switch further includes a power transistor.

9. A light emitting diode lighting system comprising:

(a) at least one light emitting diode;

(b) a power supply; and

(c) a closed feedback loop connected between an output and a first input of a comparator pertaining to controlling operating temperature of said light emitting diode to oscillator around a predetermined value, said first input is coupled to an output of a temperature sensor pertaining to measuring temperature of said light emitting diode, said predetermined value is set by a second input of the comparator.

10. The system as recited in claim 9, wherein the output of the comparator is coupled to a power modulator including a pulse width modulator that modulates an incoming DC power before the power is delivered to power said light emitting diode.

11. The system as recited in claim 9, wherein the output of the comparator is coupled to a power modulator including a bit stream modulator that modulates an incoming DC power before the power is delivered to power said light emitting diode.

12. The system as recited in claim 9, wherein the output of the comparator is coupled to a secondary winding of a power transformer through a switch, wherein said switch further includes a power transistor.

13. The system as recited in claim 9, wherein said second input of the comparator is coupled to an ambient temperature sensor.

14. The system as recited in claim 9, wherein said second input of the comparator is coupled to a reference generated by a controller.

15. The system as recited in claim 14, wherein said reference is adjustable by a remote control device.

16. A light emitting diode lighting system comprising:

(a) at least one light emitting diode;

(b) a power supply;

(c) a closed feedback loop connected between an output and a first input of a comparator pertaining to controlling operating temperature of said light emitting diode to oscillator around a predetermined value;

(d) a controller; and

(e) a remote control device pertaining to determining said predetermined value through adjusting a reference coupled to a second input of the comparator by the controller.

17. The system as recited in claim 16, wherein said first input is coupled to an output of a temperature sensor pertaining to measuring temperature of said light emitting diode, said predetermined value is set by a second input of the comparator.

18. The system as recited in claim 17, wherein said temperature sensor comprises an infrared sensor.

19. The system as recited in claim 16, wherein the output of the comparator is coupled to a power modulator including a pulse width modulator or a bit stream modulator that modulates an incoming DC power before the power is delivered to power said light emitting diode.

20. The system as recited in claim 16, wherein the output of the comparator is coupled to a secondary winding of a power transformer through a switch, wherein said switch further includes a power transistor.