Lighting device comprising at least one light-emitting diode and vehicle headlight

• US 7,806,562 B2
• Filed: 01/12/2005
• Issued: 10/05/2010
• Est. Priority Date: 12/22/2004
• Status: Active Grant

• Current Assignee: Osram Beteiligungsverwaltung GmbH (Ams-Osram AG)
• Original Assignee: OSRAM GmbH (Ams-Osram AG)
• Inventors: Behr, Gerhard, Helbig, Peter, Reiners, Thomas, Vollmer, Ralf
• Primary Examiner(s): Husar; Stephen F
• Assistant Examiner(s): Neils; Peggy A.
• Application Number:
  US11/792,417
• Publication Number:
  US 20080130308A1
• Time in Patent Office: 2,092 Days
• Field of Search: 362/294, 362/373, 362/545, 362/547, 362/800, 362/249.02, 361/703
• US Class Current: 362/294
• CPC Class Codes: F21K 9/00 Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
• CPC Class Codes: F21K 9/61 using light guides
• CPC Class Codes: F21S 41/151 arranged in one or more lines
• CPC Class Codes: F21S 41/192 Details of lamp holders, terminals or connectors
• CPC Class Codes: F21S 45/47 Passive cooling, e.g. using fins, thermal conductive elements or openings
• CPC Class Codes: F21V 23/00 Arrangement of electric circuit elements in or on lighting devices characterised by cooling arrangements F21V29/508
• CPC Class Codes: F21V 29/75 with fins or blades having different shapes, thicknesses or spacing
• 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 29/773 the planes containing the fins or blades having the direction of the light emitting axis
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

A lighting device includes at least one light-emitting diode and a cooling aggregate (400) for cooling the at least one light-emitting diode, wherein the at least one light-emitting diode is arranged on the cooling aggregate (400) and the cooling aggregate (400) is provided with at least one recess in which a mounting plate (408) equipped with electrical components is located. Also described is a vehicle headlight including at least one lighting device of the aforementioned kind.

Claims

1. An illumination device having at least one light-emitting diode and a heat sink for the purpose of cooling the at least one light-emitting diode, wherein said heat sink has cooling ribs and at least one cutout, in which a mounting plate is arranged which is fitted with electrical components used for operating said at least one light-emitting diode, wherein said at least one cutout and said mounting plate are arranged in the region of the cooling ribs, and wherein said heat sink is used both for cooling the at least one light-emitting diode and for cooling the electrical components.

2. The illumination device as claimed in claim 1, wherein an electrical connection is required to supply electrical energy to the electrical components, and said heat sink has at least one further cutout for the electrical connection of the illumination device.

3. The illumination device as claimed in claim 1, wherein one of the cooling ribs is provided with the at least one cutout, the mounting plate being arranged in the at least one cutout.

4. The illumination device as claimed in claim 2, wherein said electrical connection of the illumination device is arranged on the mounting plate.

5. The illumination device as claimed in claim 1, wherein said at least one light-emitting diode is arranged and aligned in a defined position and orientation with respect to the heat sink.

6. The illumination device as claimed in claim 1, wherein said heat sink is provided with means for mounting the illumination device in the correct position in a vehicle headlight.

7. The illumination device as claimed in claim 6, wherein said means are formed as part of a bayonet-type lock between the illumination device and the vehicle headlight.

8. The illumination device as claimed in claim 7, wherein an electrical connection is required to supply electrical energy to the electrical components, and said electrical connection of the illumination device has at least one contact web which extends perpendicularly with respect to the axis of the rotary movement of the bayonet-type lock, with the result that, owing to the rotary movement when the bayonet-type lock is latched or unlatched, the electrical contact between the at least one contact web and its opposing contact on the vehicle headlight is produced or released.

9. A vehicle headlight having at least one illumination device as claimed in claim 1.

10. The illumination device as claimed in claim 3, wherein an electrical connection is required to supply electrical energy to the electrical components, and said electrical connection of the illumination device is arranged on the mounting plate.

11. The illumination device as claimed in claim 5, wherein said heat sink is provided with means for mounting the illumination device in the correct position in a vehicle headlight.

12. A vehicle headlight having at least one illumination device as claimed in claim 2.

13. A vehicle headlight having at least one illumination device as claimed in claim 3.

14. A vehicle headlight having at least one illumination device as claimed in claim 4.

15. A vehicle headlight having at least one illumination device as claimed in claim 5.

16. A vehicle headlight having at least one illumination device as claimed in claim 6.

17. A vehicle headlight having at least one illumination device as claimed in claim 7.

18. A vehicle headlight having at least one illumination device as claimed in claim 8.