Integrated Electronic Device for Controlling Light Emitting Diodes

• US 20110193491A1
• Filed: 01/31/2011
• Published: 08/11/2011
• Est. Priority Date: 02/05/2010
• Status: Active Grant

• Current Assignee: LUXERA, Inc.
• Original Assignee: LUXERA, Inc.
• Inventors: LIVSCHITZ, Leonard S., CHOUTOV, Dmitri A.
• Granted Patent: US 8,587,956 B2
• Time in Patent Office: Days
• US Class Current: 315/291
• CPC Class Codes: H05B 45/325 Pulse-width modulation [PWM]
• CPC Class Codes: H05B 45/3725 Switched mode power supply [SMPS]
• CPC Class Codes: Y02B 20/00 Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps

Abstract

A compact driver device for driving an LED lighting device is provided. The driver device includes a substrate, power capacitor that provides LED driving current to drive the LED lighting device, and a power resistor. Advantageously, the power capacitor and the power resistor are attached to the substrate and are solderlessly connected to each other to provide a very compact driver device.

Claims

1. A driver device for driving an LED lighting device comprising:

at least one substrate;

at least one power capacitor that provides LED driving current to drive the LED lighting device;

at least one power resistor, wherein the power capacitor and the power resistor are attached to the substrate and solderlessly connected to each other.

2. The driver device of claim 1, further comprising:

a rectifier for rectifying AC to DC; and

a LED controller circuit for controlling the LED driving current, wherein the rectifier and the LED controller circuit are solderlessly connected to the power resistor and the power capacitor.

3. The driver device of claim 2, further comprising a power transistor solderlessly connected to the power resistor and power capacitor.

4. The driver device of claim 1, wherein the power resistor and the power capacitor are packageless components.

5. The driver device of claim 1, wherein the substrate includes an organic substrate.

6. The driver device of claim 2, wherein:

the substrate includes;

a first substrate over which the rectifier, power resistor and LED controller circuit are positioned; and

a second substrate position over the first substrate to sandwich the rectifier, power resistor and LED controller circuit therebetween; and

the driver device includes discrete components attached over the second substrate with solder.

7. The driver device in claim 1, further comprising:

a rectifier for rectifying AC to DC and solderlessly connected to the power resistor and power capacitor; and

a plurality of vias containing conductive material in contact with the rectifier on one end and in electrical contact with a heat sink on the other end.

8. The driver device of claim 1, wherein:

the power capacitor includes a plurality of power capacitors formed on the same monolithic substrate.

9. The driver device of claim 1, wherein:

the power capacitor and the power resistor are formed on the same monolithic substrate.

10. The driver device of claim 1, wherein the power capacitor has a capacitance value of greater that 1 nF and formed on the same monolithic substrate as other electronic components of the driver device.

11. The driver device of claim 1, further comprising an inductor having an inductance value of greater than 1 nH and formed on the same monolithic substrate as other electronic components of the driver device.

12. The driver device of claim 1, further comprising an input stage transient voltage protector solderlessly connected to the power resistor and power capacitor.

13. The driver device of claim 1, wherein the power capacitor is contained in an integrated passive device.

14. The driver device of claim 1, further comprising:

a rectifier for rectifying AC to DC and solderlessly connected to the power resistor and power capacitor;

a LED controller circuit for controlling the LED driving current; and

wherein;

the substrate includes a silicon substrate; and

the power capacitor and the rectifier are positioned within the silicon substrate.

15. The driver device of claim 14, wherein the power capacitor is contained in an integrated passive device.

16. The driver device of claim 14, wherein the rectifier and power resistor are contained in at least one integrated passive or active device.

17. The driver device of claim 14, further comprising a dielectric layer attached to the silicon substrate, wherein the rectifier, power capacitor and LED controller circuit are connected to each other through electrical connections through the dielectric layer.

18. The driver device of claim 14, wherein multiple copies of the power capacitor and the rectifier are contained in a wafer for producing multiple copies of at least a part of the driver device.

19. The driver device of claim 1, further comprising:

a rectifier for rectifying AC to DC;

a LED controller circuit for controlling the LED driving current;

a power transistor;

a Zener diode, all of which are solderlessly connected to each other;

wherein;

the substrate includes a silicon substrate; and

the power capacitor, rectifier, LED controller circuit, power transistor and Zener diode are positioned within the silicon substrate.

20. The driver device of claim 19, wherein:

the substrate includes first and second silicon substrates joined to each other; and

some electrical components are disposed within the first substrate and some of the other electrical components are disposed within the second substrate.

21. The driver device of claim 19, further comprising

a radio receiver and a light sensor both of which are solderlessly connected to other electrical components;

wherein the radio receiver and light sensor are disposed within the silicon substrate.

22. A driver device for driving an LED lighting device comprising:

at least one substrate;

at least one power resistor;

at least one inductor;

wherein the inductor and the power resistor are attached to the substrate and solderlessly connected to each other.

23. The driver device of claim 22, further comprising:

a rectifier for rectifying AC to DC; and

a LED controller circuit for controlling the LED driving current, wherein the rectifier and the LED controller circuit are solderlessly connected to the power resistor and the inductor.

24. The driver device of claim 22, wherein the power resistor and the inductor are packageless components.

25. The driver device in claim 22, further comprising:

a rectifier for rectifying AC to DC and solderlessly connected to the power resistor and inductor; and

a plurality of vias containing conductive material in contact with the rectifier on one end and in electrical contact with a heat sink on the other end.

26. The driver device of claim 22, wherein the inductor and the power resistor are formed on the same monolithic substrate.

27. The driver device of claim 22, wherein the inductor has an inductance value of greater than 1 nH and is formed on the same monolithic substrate as other electronic components of the driver device.

28. The driver device of claim 22, further comprising an input stage transient voltage protector solderlessly connected to the power resistor and inductor.

29. The driver device of claim 22, wherein the inductor is contained in an integrated passive device.

30. The driver device of claim 22, further comprising:

a rectifier for rectifying AC to DC and solderlessly connected to the power resistor and inductor;

a LED controller circuit for controlling the LED driving current; and

wherein;

the substrate includes a silicon substrate; and

the power resistor and the rectifier are positioned within the silicon substrate.

31. The driver device of claim 30, wherein the inductor is contained in an integrated passive device.

32. The driver device of claim 30, wherein the rectifier and inductor are contained in at least one integrated passive or active device.

33. The driver device of claim 30, further comprising at least one power capacitor that provides LED driving current to drive the LED lighting device and is solderlessly connected to the power resistor and inductor, wherein multiple copies of the power capacitor and the rectifier are contained in a wafer for producing multiple copies of at least a part of the driver device.

34. A driver device for driving an LED lighting device comprising:

at least one substrate;

a rectifier for rectifying AC to DC;

at least one output power capacitor that receives the DC and provides LED driving current to drive the LED lighting device;

a controller integrated circuit (IC) that controls the DC provided to the power capacitor;

wherein the rectifier, power capacitor and controller IC are attached to the substrate and solderlessly connected to each other.

35. The driver device of claim 34, further comprising a power transistor controlled by the controller IC and adapted to provide the DC to the power capacitor, wherein the power transistor is solderlessly connected to other electrical components of the driver device.

36. The driver device of claim 34, wherein:

the substrate includes;

a first substrate over which the rectifier and controller IC are positioned; and

a second substrate position over the first substrate to sandwich the rectifier and the controller circuit therebetween; and

an adhesive disposed between the first and second substrates to fix the two substrates together.

37. The driver device in claim 34, further comprising a plurality of vias formed through the substrate and containing conductive material in contact with the rectifier on one end and in electrical contact with a heat sink on the other end.

38. The driver device of claim 34, wherein:

the power capacitor includes a plurality of power capacitors formed on the same monolithic substrate.

39. The driver device of claim 34, wherein the power capacitor has a capacitance value of greater that 1 nF and formed on the same monolithic substrate as other electronic components of the driver device.

40. The driver device of claim 34, further comprising an inductor having an inductance value of greater than 1 nH and formed on the same monolithic substrate as other electronic components of the driver device.

41. The driver device of claim 34, further comprising an input stage transient voltage protector solderlessly connected to other electrical components of the driver device.

42. The driver device of claim 34, wherein:

the substrate includes a silicon substrate; and

the power capacitor and the rectifier are positioned within the silicon substrate.

43. The driver device of claim 34, wherein multiple copies of the power capacitor and the rectifier are contained in a wafer for producing multiple copies of at least a part of the driver device.

44. The driver device of claim 34, further comprising:

a power transistor and

a Zener diode, both of which are solderlessly connected to other electrical components of the driver device;

wherein;

the substrate includes a silicon substrate; and

the power capacitor, rectifier, LED controller circuit, power transistor and Zener diode are positioned within the silicon substrate.

45. The driver device of claim 44, wherein:

the substrate includes first and second silicon substrates joined to each other; and

some electrical components of the driver device are disposed within the first substrate and some of the other electrical components of the driver device are disposed within the second substrate.

46. The driver device of claim 44, further comprising:

a radio receiver and a light sensor both of which are solderlessly connected to other electrical components of the driver device;

wherein the radio receiver and light sensor are disposed within the silicon substrate.