Driver for amplifying operating voltage of luminary

• US 20040046771A1
• Filed: 08/19/2002
• Published: 03/11/2004
• Est. Priority Date: 08/19/2002
• Status: Active Grant

• Current Assignee: Instrument Technology Research Center
• Original Assignee: Instrument Technology Research Center
• Inventors: Liao, Tai-Shan, Chen, Min-Li
• Granted Patent: US 6,950,096 B2
• Time in Patent Office: Days
• US Class Current: 345/690
• CPC Class Codes: H05B 45/10 Controlling the intensity of the light
• CPC Class Codes: H05B 45/38 using boost topology

Abstract

The present invention discloses a driver for amplifying an operating voltage of a low driving-voltage luminary. The driver includes a driving circuit providing a first signal, and a negative multiple voltage circuit electrically connected to the driving circuit and the luminary respectively for transforming the first signal into a second signal to be transmitted to the luminary, thereby the luminary being driven in response to the second signal. The luminary circuit is connected between power source (Vdd) and the negative multiple voltage circuit.

Claims

1. A driver for amplifying an operating voltage of a luminary, comprising:

a driving circuit providing a first signal; and

a negative multiple voltage circuit electrically connected to said driving circuit and said luminary respectively for transforming said first signal into a second signal to be transmitted to said luminary, thereby said luminary being driven in response to said second signal.

2. The driver according to claim 1, wherein said first signal is an alternating current signal.

3. The driver according to claim 1, wherein said second signal is a direct current signal.

4. The driver according to claim 1, wherein said second signal is a negative voltage.

5. The driver according to claim 1, wherein said second signal has an absolute voltage larger than that of said first signal.

6. The driver according to claim 1, wherein said operating voltage is larger than 4.5 V.

7. The driver according to claim 1, wherein said luminary is driven via a relatively low driving voltage.

8. The driver according to claim 7, wherein said relatively low driving voltage can be used less than 1.5 V.

9. The driver according to claim 1, wherein said driving circuit is a step-up circuit via capacitor-inductor oscillating.

10. The driver according to claim 1, wherein said negative multiple voltage circuit further comprises:

a first capacitor electrically connected to said driving circuit;

a first diode having an anode electrically connected to said first capacitor and a cathode grounded;

a second diode having an anode and a cathode electrically connected to said first capacitor and said anode of said first diode simultaneously; and

a second capacitor having one terminal electrically connected to said anode of said second diode and said luminary simultaneously and another terminal grounded.

11. The driver according to claim 6 further comprising a protecting circuit electrically connected between said anode of said second diode and said luminary.

12. A driver for amplifying an operating voltage of a luminary and driving said luminary, comprising:

a driving circuit providing a first signal; and

a rectifying circuit electrically connected to said driving circuit and said luminary respectively for transforming said first signal into a second signal to be transmitted to said luminary, thereby said luminary being driven in response to said second signal.

13. The driver according to claim 12, wherein said first signal is an alternating current signal.

14. The driver according to claim 12, wherein said second signal is a direct current signal.

15. The driver according to claim 12, wherein said second signal is a negative voltage.

16. The driver according to claim 12, wherein said second signal has an absolute voltage larger than that of said first signal.

17. The driver according to claim 12, wherein said operating voltage is larger than 4.5 V.

18. The driver according to claim 12, wherein said luminary is driven via a relatively low driving voltage.

19. The driver according to claim 18, wherein said relatively low driving voltage can be used less than 1.5 V.

20. The driver according to claim 12, wherein said driving circuit is a step-up circuit via capacitor-inductor oscillating.

21. The driver according to claim 12, wherein said rectifying circuit further comprises:

a diode having a cathode electrically connected to said driving circuit and an anode; and

a capacitor having one terminal electrically connected to said anode of said diode and said luminary simultaneously and another terminal grounded.

22. The driver according to claim 21 further comprising a protecting circuit electrically connected between said anode of said diode and said luminary.

23. A driver for amplifying an operating voltage of a luminary and driving said luminary, comprising:

a driving circuit providing a first signal; and

a step-up circuit electrically connected to said driving circuit and said luminary respectively for transforming said first signal into a second signal to be transmitted to said luminary, thereby said luminary being driven in response to said second signal.

24. The driver according to claim 23, wherein said first signal is an alternating current signal.

25. The driver according to claim 23, wherein said second signal is a direct current signal.

26. The driver according to claim 23, wherein said operating voltage is larger than 4.5 V.

27. The driver according to claim 23, wherein said luminary is driven via a relatively low driving voltage.

28. The driver according to claim 27, wherein said relatively low driving voltage can be used less than 1.5V

29. The driver according to claim 23, wherein said driving circuit is a step-up circuit via capacitor-inductor oscillating.

30. The driver according to claim 23, wherein said step-up circuit further comprises:

a first capacitor electrically connected to said driving circuit;

a first diode having an anode electrically connected to said first capacitor and an cathode grounded;

a second diode having an anode, and a cathode electrically connected to said first capacitor and said anode of said first diode simultaneously; and

a second capacitor having one terminal electrically connected to said anode of said second diode and said luminary simultaneously and another terminal grounded.

31. The driver according to claim 30 further comprising a protecting circuit electrically connected between said anode of said second diode and said luminary.

32. The driver according to claim 23, wherein said step-up circuit is a negative multiple voltage circuit.

33. The driver according to claim 32, wherein said negative multiple voltage circuit further comprises:

a first capacitor electrically connected to said driving circuit;

a first diode having an anode electrically connected to said first capacitor and a cathode grounded;

a second diode having an anode, and a cathode electrically connected to said first capacitor and said anode of said first diode simultaneously; and

a second capacitor having one terminal electrically connected to said anode of said second diode and said luminary simultaneously and another terminal grounded.

34. The driver according to claim 33 further comprising a protecting circuit electrically connected between said anode of said second diode and said luminary.

35. The driver according to claim 23, wherein said step-up circuit is a rectifying circuit.

36. The driver according to claim 35, wherein said rectifying circuit further comprises:

a diode having a cathode electrically connected to said driving circuit and an anode;

a capacitor having one terminal electrically connected to said anode of said diode and said luminary simultaneously and another terminal grounded.

37. The driver according to claim 36 further comprising a protecting circuit electrically connected between said anode of said diode and said luminary.