LED LAMP

• US 20090059559A1
• Filed: 08/27/2008
• Published: 03/05/2009
• Est. Priority Date: 08/28/2007
• Status: Active Grant

• Current Assignee: LEDVANCE GmbH (MLS Co. Ltd.)
• Original Assignee: OSRAM Licht AG (Ams-Osram AG)
• Inventors: Pabst, Wolfgang, Straub, Steffen
• Granted Patent: US 8,066,414 B2
• Time in Patent Office: Days
• US Class Current: 362/84
• 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 29/67 characterised by the arrangement of fans
• CPC Class Codes: F21V 29/677 the fans being used for discharging
• CPC Class Codes: F21V 29/75 with fins or blades having different shapes, thicknesses or spacing
• 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 29/763 the planes containing the fins or blades having the direction of the light emitting axis
• CPC Class Codes: F21V 29/777 the planes containing the fins or blades having directions perpendicular to the light emitting axis
• CPC Class Codes: F21V 29/83 the elements having apertures, ducts or channels, e.g. heat radiation holes
• 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 2113/13 comprising an assembly of point-like light sources
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

An LED lamp has a lamp base and a support connected to the lamp base, on which at least one LED is mounted, the support including at least one hollow element, each with at least two air passage openings to permit an air flow through a cavity of at least one hollow element.

Claims

1. An LED lamp comprising a lamp base and at least one support connected to lamp base, on which at least one LED is mounted, the support having at least one hollow element, each with at least two air passage openings to permit air flow through a cavity of at least one hollow element.

2. The LED lamp according to claim 1, wherein the support has a well heat-conducting material for heat conduction.

3. The LED lamp according to claim 2, wherein the heat-conducting material is aluminum or copper.

4. The LED lamp according to claim 1, wherein the hollow element has a cylindrical basic shape, whose base surface or cover surface has at least one air passage opening.

5. The LED lamp according to claim 1, wherein the hollow element has a basic shape of a parallelepiped, especially cuboid, in which at least two opposite surfaces each have at least one air passage opening.

6. The LED lamp according to claim 1, wherein the support has several hollow elements.

7. The LED lamp according to claim 1, wherein at least one cooling rib or cooling fin is arranged in at least one cavity.

8. The LED lamp according to claim 7, wherein several cooling ribs are arranged parallel to each other.

9. The LED lamp according to claim 8, wherein all cooling ribs are arranged parallel to each other.

10. The LED lamp according to claim 7, wherein the cooling ribs are arranged angled to each other or angled to each other with angular symmetry.

11. The LED lamp according to claim 1, wherein several LEDs are arranged uniformly or symmetrically on the surface of at least one hollow element.

12. The LED lamp according to claim 1, wherein control electronics to control the at least one LED is integrated in the lamp base.

13. The LED lamp according to claim 1, wherein the at least one LED has at least two LEDs of different color.

14. The LED lamp according to claim 1, further comprising a signal receiver to receive signals to adjust color output.

15. The LED lamp according to claim 1, further comprising a fan for active generation of an air stream through at least one of the hollow elements.

16. The LED lamp according to claim 15, further comprising a control device for temperature-dependent control of the fan power.

17. The LED lamp according to claim 1, further comprising a cover to cover the support.

18. The LED lamp according to claim 16, wherein the cover has a light-scattering property.

19. The LED lamp according to claim 16, wherein the cover has a base shape in the form of a bulb of an ordinary incandescent lamp.

20. The LED lamp according to claim 16, wherein the cover comprises phosphor.

21. The LED lamp according to claim 16, comprising at least one air passage opening in cover or an air outlet opening to blow out an exhaust stream.

22. The LED lamp according to claim 1, comprising at least one air passage opening in the lamp base or an air inlet opening to draw in an air stream in the cavity of at least one hollow element.