Luminous diode arrangement with reflector

• US 20020191398A1
• Filed: 08/14/2002
• Published: 12/19/2002
• Est. Priority Date: 02/14/2000
• Status: Active Grant

• Current Assignee: Zumtobel Staff GmbH
• Original Assignee: Zumtobel Staff GmbH
• Inventors: Keller, Katharina
• Granted Patent: US 6,857,763 B2
• Time in Patent Office: Days
• US Class Current: 362/247
• CPC Class Codes: F21V 14/02 by movement of light sources in vehicle head lamps F21S41/657
• CPC Class Codes: F21V 19/00 Fastening of light sources or lamp holders fastening electric light source solely by the coupling device H01R33/00 ; special means for attaching candle to candle holder F21V35/003
• CPC Class Codes: F21V 19/001 the light sources being semiconductors devices, e.g. LEDs
• CPC Class Codes: F21V 29/74 with fins or blades
• 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 7/0008 providing for indirect lighting
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: Y10S 362/80 Light emitting diode

Abstract

The invention relates to a luminaire having a light source (2) which has at least one light emitting semiconductor, and having a, as seen from the light source (2), concave reflector (1), the light source (2) being arranged in substance in the longitudinal axis of the reflector (1). In accordance with the invention, the light source (2) is of a plurality of luminous diodes (4) arranged on a carrier surface (3) and controllable, the ratio between the carrier surface (3) and the opening of the reflector (1) being between 1:3 and 1:20.

Claims

1. A luminaire comprising:

a concave reflector having a longitudinal axis and an opening having an area;

a light source, including a carrier and a plurality of controllable luminous diode chips arranged on a surface of said carrier which faces said reflector, the areas of said carrier surface and of said opening having a ratio between 1;

3 and 1;

20; and

a cooling body arranged on a surface of the carrier surface which faces away from said reflector.

2. A luminaire according to claim 1, wherein

the ratio between the areas of said carrier surface and said opening being 1:

10.

3. A luminaire according to claim 1, wherein

said luminious diode chips emit light in different colors.

4. A luminaire according to claim 1, wherein

said light source is held by current or control lines.

5. A luminaire according to claim 4, wherein

said lines span across said concavity opening.

6. A luminaire according to claim 4, wherein

said current or control lines extend from at least one point on an inner surface of said reflector to said opening.

7. A luminaire according to claim 6, wherein

said light source is adjustable in its spacing from the reflector.

8. A luminaire according to claim 1, wherein

said light source is arranged at a focal point of said reflector.

9. A luminaire according to claim 1, wherein

said reflector has an inner concave surface which is diffusely reflecting.