Lamp for general lighting

• US 9,746,137 B2
• Filed: 09/10/2014
• Issued: 08/29/2017
• Est. Priority Date: 08/27/2009
• Status: Active Grant

• Current Assignee: Pictiva Displays International Limited (f/k/a Dolya Holdco 5 Limited) (Key Patent Innovations Limited)
• Original Assignee: OSRAM GmbH (Ams-Osram AG)
• Inventors: Moeck, Martin
• Primary Examiner(s): Husar, Stephen F
• Application Number:
  US14/482,007
• Publication Number:
  US 20140376225A1
• Time in Patent Office: 1,084 Days
• 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: F21S 6/002 Table lamps, e.g. for ambient lighting
• CPC Class Codes: F21S 6/004 with a lamp housing in direct contact with the floor or ground
• CPC Class Codes: F21S 8/04 intended only for mounting on a ceiling or the like overhead structures F21S8/02 takes precedence; details of ceiling bases F21V21/03
• CPC Class Codes: F21V 21/02 Wall, ceiling, or floor bases; Fixing pendants or arms to the bases F21V21/08 takes precedence; bases for movable standing lamps F21V21/06
• CPC Class Codes: F21V 21/108 Arms
• CPC Class Codes: F21V 29/507 of means for protecting lighting devices from damage, e.g. housings
• CPC Class Codes: F21V 29/70 characterised by passive heat-dissipating elements, e.g. heat-sinks
• CPC Class Codes: F21V 29/745 the fins or blades being planar and inclined with respect to the joining surface from which the fins or blades extend
• CPC Class Codes: F21V 29/75 with fins or blades having different shapes, thicknesses or spacing
• CPC Class Codes: F21V 29/767 the planes containing the fins or blades having directions perpendicular to the light emitting axis
• CPC Class Codes: F21W 2131/30 Lighting for domestic or personal use
• CPC Class Codes: F21Y 2105/00 Planar light sources
• CPC Class Codes: F21Y 2113/00 Combination of light sources
• CPC Class Codes: F21Y 2113/13 comprising an assembly of point-like light sources
• CPC Class Codes: F21Y 2113/20 of different form
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: F21Y 2115/15 Organic light-emitting diodes [OLED]

Abstract

A lamp includes a lamp housing which has a light exit opening. A light source of a first type is arranged in the lamp housing. A mounting is fastened to the lamp housing and at least one light source of a second type is fastened to the holder. The at least one light source of the second type includes an organic light-emitting diode and the at least one light source of the second type is arranged downstream of the light exit opening in an emission direction.

Claims

1. A lamp comprising:

a lamp housing, which has a light exit opening;

a light source of a first type arranged in the lamp housing;

a lampholder fastened on the lamp housing; and

a light source of a second type fastened on the lampholder, the light source of the second type comprising an organic light-emitting diode, and the light source of the second type arranged downstream of the light exit opening in an emission direction, wherein the lamp housing has a first cavity designed as an ellipsoid of revolution, in some places, the light source of the first type being arranged in a vicinity of one focal point of the ellipsoid of revolution that is remote from the light exit opening, and wherein the light exit opening is arranged in a vicinity of another focal point of the ellipsoid of revolution.

2. The lamp according to claim 1, wherein the light source of the second type is designed to be reflective, at least in some places, and light emitted during operation of the light source of the first type impinges on and is reflected by the light source of the second type.

3. The lamp according to claim 1, wherein the light source of the second type is designed to be transmissive to radiation, at least in some places, and light emitted during operation of the light source of the first type impinges on and radiates through the light source of the second type.

4. The lamp according to claim 1, wherein the lamp housing has a first cavity, in which the light source of the first type is arranged, wherein an inner face of the first cavity facing the light source of the first type, is reflective.

5. The lamp according to claim 1, wherein the first cavity is designed in the manner of an ellipsoid which is cut away in the region of its focal planes along the focal planes.

6. The lamp according to claim 1, wherein the lamp housing has a second cavity arranged on a side of the first cavity remote from the light exit opening.

7. The lamp according to claim 1, wherein the lamp housing has a basic body in the form of a truncated cone or a truncated pyramid, at least in some places, wherein the truncated cone or the truncated pyramid tapers in a direction opposite to a direction of the light exit opening.

8. The lamp according to claim 1, wherein the lamp housing has a basic body and at least two cooling disks and/or cooling ribs, the cooling disks and/or the cooling ribs being fastened on the basic body spaced apart from one another and surrounding the basic body laterally.

9. The lamp according to claim 7, wherein an outer face of the lamp housing that surrounds the light exit opening is reflective, at least in some places.

10. The lamp according to claim 1, wherein the lampholder is used for electrically connecting the light source of the second type.

11. The lamp according to claim 1, wherein the light source of the second type is mounted rotatably.

12. The lamp according to claim 11, wherein the lampholder comprises at least two rods, between which the light source of the second type is mounted rotatably.

13. The lamp according to claim 1, wherein the lampholder comprises at least one rod in the shape of a sinusoidal function, at least in some places.

14. The lamp according to claim 1, wherein the lampholder comprises first and second rods, a profile of the second rod proceeding from a profile of the first rod and a rotation about the main axis of extent of the first rod.

15. The lamp according to claim 1, wherein the lampholder is designed in the manner of a two-start screw, the lampholder comprising two rods, which are each in the form of a helix.

16. The lamp according to claim 6, further comprising a drive apparatus arranged in the second cavity, the drive apparatus configured to drive the light sources.

17. The lamp according to claim 1, further comprising a further light source of the second type arranged downstream of the light exit opening in the emission direction.

18. The lamp according to claim 17, wherein the lampholder comprises at least two rods, between which the light source of the second type and the second light source of the second type are mounted rotatably.

19. A lamp comprising:

a lamp housing, which has a light exit opening;

a light source of a first type arranged in the lamp housing;

a lampholder fastened on the lamp housing;

a light source of a second type fastened on the lampholder the light source of the second type comprising an organic light-emitting diode, and the light source of the second type arranged downstream of the light exit opening in an emission direction, wherein the lampholder comprises first and second rods, a profile of the second rod proceeding from a profile of the first rod and a rotation about the main axis of extent of the first rod.

20. The lamp according to claim 19, wherein the first and the second rods follow the shape of a sinusoidal function, at least in some places.

21. The lamp according to claim 19, wherein the first and the second rods follow each the form of a helix.

22. A lamp comprising:

a lamp housing, which has a light exit opening;

a light source of a first type arranged in the lamp housing;

a lampholder fastened on the lamp housing;

a light source of a second type fastened on the lampholder the light source of the second type comprising an organic light-emitting diode, and the light source of the second type arranged downstream of the light exit opening in an emission direction, wherein the second type is reflective, at least in some places, and light emitted during operation of the light source of the first type impinges on and is reflected by the light source of the second type.

23. The lamp according to claim 22, wherein the light source of the second type is reflective on a rear side of the light source of the second type remote from an emission side of the light source of the second type.