LED LAMP

• US 20120188771A1
• Filed: 08/08/2008
• Published: 07/26/2012
• Est. Priority Date: 08/10/2007
• Status: Active Grant

• Current Assignee: LEDVANCE GmbH (MLS Co. Ltd.)
• Original Assignee: OSRAM GmbH (Ams-Osram AG)
• Inventors: Kraus, Robert, Lanchava, Bakuri, Pabst, Wolfgang
• Granted Patent: US 8,662,712 B2
• Time in Patent Office: Days
• US Class Current: 362/294
• CPC Class Codes: F21K 9/232 specially adapted for generating an essentially omnidirectional light distribution, e.g. with a glass bulb
• CPC Class Codes: F21V 29/506 of globes, bowls or cover glasses
• CPC Class Codes: F21V 29/58 characterised by the coolants
• CPC Class Codes: F21V 29/76 with essentially identical parallel planar fins or blades, e.g. with comb-like cross-section
• CPC Class Codes: F21V 29/77 with essentially identical diverging planar fins or blades, e.g. with fan-like or star-like cross-section
• CPC Class Codes: F21V 3/02 characterised by the shape
• CPC Class Codes: F21Y 2107/30 on the outer surface of cylindrical surfaces, e.g. rod-shaped supports having a circular or a polygonal cross section
• CPC Class Codes: F21Y 2107/90 on two opposite sides of supports or substrates
• CPC Class Codes: F21Y 2113/13 comprising an assembly of point-like light sources
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

An LED lamp may include at least one support equipped with at least one LED, a lamp base, at least one circuit component, interposed between the lamp base and the at least one LED, for operating the at least one LED, and a lamp body made of optically transmissive material with a recess for holding at least that part of the support which carries the at least one LED, the lamp body having surface structuring for cooling by thermal convection, wherein the surface structuring comprises a multiplicity of elevations, and wherein the elevations are respectively designed in the form of islands.

Claims

1. An LED lamp, comprising:

at least one support equipped with at least one LED,

a lamp base,

at least one circuit component, interposed between the lamp base and the at least one LED, for operating the at least one LED, and

a lamp body made of optically transmissive material with a recess for holding at least that part of the support which carries the at least one LED,

the lamp body having surface structuring for cooling by thermal convection;

wherein the surface structuring comprises a multiplicity of elevations; and

wherein the elevations are respectively designed in the form of islands.

2. The LED lamp as claimed in claim 1,

wherein the outline of the lamp body is configured to fit into an outline of a conventional light bulb.

5. The LED lamp as claimed in claim 1, wherein the islands respectively have a shape selected from a group consisting of:

a round base shape; and

a quadrilateral base shape in plan view.

23. The LED lamp as claimed in claim 1,

wherein the lamp body comprises at least one material selected from a group consisting of:

thermoplastic;

polycarbonate;

polytetrafluoroethylene; and

epoxy resin.

24. The LED lamp as claimed in claim 1,

wherein the lamp body is designed as an optical medium which scatters diffusely in the visible spectrum.

25. The LED lamp as claimed in claim 24,

wherein the lamp body comprises scattering centers.

26. The LED lamp as claimed in claim 1,

wherein the lamp body comprises an illuminant.

27. The LED lamp as claimed in claim 26,

wherein the illuminant comprises at least one of transparent organic illuminants and rare earth complexes with organic phosphor.

28. The LED lamp as claimed in claim 1, furthermore comprising:

a heat exchanger for heat exchange between the support and the lamp body.

29. The LED lamp as claimed in claim 28,

wherein the heat exchanger comprises at least one of metal;

a metal compound;

graphite; and

nanotubes.

30. The LED lamp as claimed in claim 28, wherein the heat exchanger extends at least as far as the surface of the lamp body.

39. The LED lamp as claimed in claim 1,

wherein the surface structuring allows an air passage between the recess and the outside encapsulation, cooling fins which are thermally coupled to the LEDs being arranged in the recess.

40. The LED lamp as claimed in claim 39,

wherein the surface structuring comprises at least one opening through the lamp body.

42. The LED lamp as claimed in claim 1,

wherein the at least one circuit component is adapted so that the LED lamp can be dimmed by means of at least one of a leading-edge dimmer and a trailing-edge dimmer.

43. The LED lamp as claimed in claim 1,

wherein the at least one circuit component is adapted so that a color temperature can be controlled by means of it.

44. The LED lamp as claimed in claim 1, furthermore comprising:

actuation elements for adjusting at least one operating parameter of the LED lamp.

45. The LED lamp as claimed in claim 44,

wherein the actuation elements comprise at least one of special buttons and switches at least one of in and on the LED lamp, which can be activated by depressing the lamp body relative to the base.

46. The LED lamp as claimed in claim 1,

the operation of which is remote-controllable.

47. The LED lamp as claimed in claim 1,

wherein the support and the lamp base form an LED module.

48. The LED lamp as claimed in claim 1,

wherein the support is equipped both with at least one LED and with at least one circuit component.

49. The LED lamp as claimed in claim 1,

wherein the surface area of the lamp body is increased by the surface structuring by up to more than 100 times in comparison with a non-surface-structured lamp body of corresponding outline.

3. (canceled)

4. (canceled)

6. An LED lamp, comprising:

at least one support equipped with at least one LED;

a lamp base,

at least one circuit component, interposed between the lamp base and the at least one LED, for operating the at least one LED;

a lamp body made of optically transmissive material with a recess for holding at least that part of the support which carries the at least one LED;

the lamp body having surface structuring for cooling by thermal convection;

wherein the surface structuring comprises a multiplicity of elevations;

wherein the elevations respectively have an elongate base shape; and

wherein the elevations extend along curved trajectories.

10. The LED lamp as claimed in claim 6, wherein the elevations are provided in the form of lamellae.

11. The LED lamp as claimed in claim 10, wherein the lamellae are essentially aligned mutually parallel.

12. The LED lamp as claimed in claim 10, wherein the lamellae are essentially aligned in a star shape.

7. (canceled)

8. An LED lamp, comprising:

at least one support equipped with at least one LED;

a lamp base;

at least one circuit component, interposed between the lamp base and the at least one LED, for operating the at least one LED;

a lamp body made of optically transmissive material with a recess for holding at least that part of the support which carries the at least one LED;

the lamp body having surface structuring for cooling by thermal convection;

wherein the surface structuring comprises a multiplicity of elevations;

wherein the elevations respectively have an elongate base shape; and

wherein the elevations respectively have an annular base shape.

9. The LED lamp as claimed in claim 8,

wherein the elevations are respectively inclined relative to a symmetry axis of the LED lamp.

13. An LED lamp, comprising:

at least one support equipped with at least one LED;

a lamp base;

at least one circuit component, interposed between the lamp base and the at least one LED, for operating the at least one LED;

a lamp body made of optically transmissive material with a recess for holding at least that part of the support which carries the at least one LED;

the lamp body having surface structuring for cooling by thermal convection;

wherein the support is designed to be flat, and a multiplicity of LEDs are mounted on it in a distributed fashion; and

wherein the support is designed as a framework with a plurality of branches.

14. The LED lamp as claimed in claim 13,

wherein the LEDs are mounted on a plane surface of the support, the support extending away from the lamp base.

15. The LED lamp as claimed in claim 13,

wherein the support has a cylindrical base shape.

16. The LED lamp as claimed in claim 13,

wherein the support has a round planar base shape, away from which a highly thermally conductive core extends along the longitudinal axis of the LED lamp.

17. The LED lamp as claimed in claim 16, wherein the core comprises at least one material selected from a group consisting of:

carbon;

aluminum; and

copper.

18. The LED lamp as claimed in claim 16, wherein the core has an optically reflective surface.

19. The LED lamp as claimed in claim 18, wherein the reflective surface comprises an illuminant.

21. The LED lamp as claimed in claim 16, wherein the branches are arranged mutually parallel.

22. The LED lamp as claimed in claim 16, wherein the branches are arranged in a star shape relative to one another in plan view.

20. (canceled)

31. An LED lamp, comprising:

at least one support equipped with at least one LED;

a lamp base;

at least one circuit component, interposed between the lamp base and the at least one LED, for operating the at least one LED;

a lamp body made of optically transmissive material with a recess for holding at least that part of the support which carries the at least one LED;

the lamp body having surface structuring for cooling by thermal convection;

further comprising a fluidic coolant between the lamp body and the support;

wherein the coolant contains an illuminant additive.

32. The LED lamp as claimed in claim 31,

wherein the coolant comprises a medium selected from a group consisting of:

water;

ethanol; and

an ethanol-water mixture.

33. The LED lamp as claimed in claim 31,

wherein the coolant comprises additives selected from a group of additives consisting of:

glycol;

ethylene glycol; and

glycerol.

34. The LED lamp as claimed in claim 31,

wherein the coolant scatters light diffusely.

35. The LED lamp as claimed in claim 31,

wherein the coolant contains an illuminant additive.

36. An LED lamp as claimed in claim 31,

at least one support equipped with at least one LED;

a lamp base;

at least one circuit component, interposed between the lamp base and the at least one LED, for operating the at least one LED;

a lamp body made of optically transmissive material with a recess for holding at least that part of the support which carries the at least one LED;

the lamp body having surface structuring for cooling by thermal convection;

further comprising a fluidic coolant between the lamp body and the support;

wherein the coolant has at least one of the following characteristics;

a low viscosity;

a high heat capacity; and

a high heat of conversion for a transition from one phase to another phase.

37. (canceled)

38. An LED lamp, comprising:

at least one support equipped with at least one LED;

a lamp base;

at least one circuit component, interposed between the lamp base and the at least one LED, for operating the at least one LED;

a lamp body made of optically transmissive material with a recess for holding at least that part of the support which carries the at least one LED;

the lamp body having surface structuring for cooling by thermal convection;

further comprising a fluidic coolant between the lamp body and the support;

wherein the support is flexibly configured so that, when there is a change in the orientation of the LED lamp, it yields to the force of gravity and therefore displaces the LEDs downward.

41. An LED lamp, comprising:

at least one support equipped with at least one LED;

a lamp base,

at least one circuit component, interposed between the lamp base and the at least one LED, for operating the at least one LED;

a lamp body made of optically transmissive material with a recess for holding at least that part of the support which carries the at least one LED;

the lamp body having surface structuring for cooling by thermal convection; and

a wire network.

50. A method for manufacturing an LED lamp, the method comprising:

equipping a support with at least one LED;

immersing the support at least partially in a bath of an encapsulation compound; and

setting the encapsulation compound.

51. The method as claimed in claim 50, further comprising:

shaping the support after the step of equipping the support.

52. The method as claimed in claim 50, further comprising:

fitting a base on the support after equipping the support.

53. The method as claimed in claim 50,

wherein the support is equipped with LEDs of different colors.

54. The method as claimed in claim 50,

wherein the support is equipped with at least one circuit component for operating the at least one LED.

55. The method as claimed in claim 50,

wherein the encapsulation compound comprises at least one of a thermoplastic and an epoxy material.

56. The method as claimed in claim 50,

wherein the encapsulation compound scatters light diffusely.

57. The method as claimed in claim 56,

wherein scattering centers are introduced into the diffusely scattering encapsulation compound.

58. The method as claimed in claim 50,

wherein the encapsulation compound is milky white.

59. The method as claimed in claim 50,

wherein the encapsulation compound contains an illuminant.

60. The method as claimed in claim 50,

wherein the encapsulation compound is set at least one of thermally;

chemically; and

by using UV light.