LED lamp

• US 8,066,414 B2
• Filed: 08/27/2008
• Issued: 11/29/2011
• 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
• Primary Examiner(s): DZIERZYNSKI, EVAN P
• Application Number:
  US12/199,472
• Publication Number:
  US 20090059559A1
• Time in Patent Office: 1,189 Days
• Field of Search: 362/294, 362/373, 362/650, 362/249.02, 362/649, 362/345
• US Class Current: 362/373
• 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. A retrofit LED lamp,

comprising a lamp base and at least one support connected to the lamp base, on which at least one LED is mounted, the support comprising several hollow elements, each with at least two air passage openings to permit air flow through a respective cavity of the hollow elements,

wherein the hollow elements have a cylindrical basic shape or a basic shape of a parallelepiped standing perpendicular relative to the LED lamp,

wherein the hollow elements are connected by cooling ribs, and

wherein the LED lamp further comprises a cover enclosing the support.

2. The retrofit LED lamp according to claim 1, wherein at least one cooling rib or cooling fin is arranged within the cavity in a vertical manner.

3. The retrofit LED lamp according to claim 2, wherein several cooling ribs are arranged parallel to each other.

4. The retrofit LED lamp according to claim 3, wherein all cooling ribs are arranged parallel to each other.

5. The retrofit LED lamp according to claim 2, wherein the cooling ribs are arranged angled to each other or angled to each other with angular symmetry.

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

7. The retrofit LED lamp according to claim 1, wherein the at least one LED has at least two LEDs of different color and wherein the retrofit LED lamp further comprises a signal receiver for receiving control signals for adjustment of a color of an emitted light.

8. The retrofit 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.

9. The retrofit LED lamp according to claim 1, wherein the cover has a light-scattering property.

10. The retrofit LED lamp according to claim 1, wherein the cover has a base shape in the form of a bulb of an ordinary incandescent lamp.

11. The retrofit LED lamp according to claim 1, wherein the cover comprises phosphor.

12. The retrofit LED lamp according to claim 1, comprising at least one air passage opening of the cover.

13. The retrofit 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.

14. The retrofit LED lamp according to claim 1, wherein the support is designed as a metal core plate.

15. The retrofit LED lamp according to claim 1, wherein the LED lamp comprises control components for operating the at least one LED wherein at least one control component is mounted on the support.

16. The retrofit LED lamp according to claim 1, wherein the cover comprises an elongated discharge channel leading from a discharge opening of the support to an outside of the LED lamp.

17. The retrofit LED lamp according to claim 1, wherein the hollow elements have a basic shape of a parallelepiped and the cooling ribs connect outer edges of the hollow elements.

18. The retrofit LED lamp according to claim 1, wherein the support comprises a discharge opening that is positioned within the cover.

19. The retrofit LED lamp according to claim 18, wherein the cover is shaped such that it provides an elongated discharge channel, and

wherein the elongated discharge channel connects the discharge opening of the support to an outside of the LED lamp.

20. A retrofit 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 comprising several cuboid or cylindrical hollow elements, each with at least two air passage openings to permit air flow through a respective cavity of the hollow elements,

wherein the hollow elements have a cylindrical basic shape or a basic shape of a parallelepiped standing perpendicular relative to the LED lamp,

wherein the hollow elements are connected by cooling ribs, and wherein the LED lamp further comprises a cover enclosing the support.