LIGHTING DEVICE

• US 20140133168A1
• Filed: 11/08/2013
• Published: 05/15/2014
• Est. Priority Date: 11/09/2012
• Status: Active Grant

• Current Assignee: OSRAM GmbH (Ams-Osram AG)
• Original Assignee: OSRAM GmbH (Ams-Osram AG)
• Inventors: Helbig, Philipp, Fiederling, Roland, Feil, Thomas
• Granted Patent: US 9,188,299 B2
• Time in Patent Office: Days
• US Class Current: 362/511
• CPC Class Codes: F21S 41/143 the main emission direction of the LED being parallel to the optical axis of the illuminating device
• CPC Class Codes: F21S 41/153 arranged in a matrix
• CPC Class Codes: F21S 41/24 Light guides
• CPC Class Codes: F21S 41/663 by switching light sources by switching incandescent light sources F21S41/162

Abstract

A lighting device may include: a plurality of light sources; and a plurality of waveguides; wherein the waveguides each have a light coupling-in surface and a light coupling-out surface; wherein the light coupling-in surfaces are respectively assigned a light-emitting surface of a light source, such that light emitted by the light-emitting surface of the light source impinges on the light coupling-in surface of the waveguide assigned thereto; wherein the light coupling-out surfaces of the waveguides are arranged in a matrix-like manner; wherein the light coupling-in surface of the respective waveguide is smaller than the light-emitting surface of the light source assigned to said waveguide, and a grating-like optical diaphragm having grating cells is provided, which is arranged in the region of the light coupling-in surfaces of the waveguides, such that light coupling-in surfaces belonging to different waveguides are arranged in different grating cells of the grating-like optical diaphragm.

Claims

1. A lighting device, comprising:

a plurality of semiconductor light sources; and

a plurality of optical waveguides;

wherein the optical waveguides each have at least one light coupling-in surface and a light coupling-out surface;

wherein the light coupling-in surfaces of the optical waveguides are respectively assigned a light-emitting surface of at least one semiconductor light source, such that light emitted by the light-emitting surface of the at least one semiconductor light source impinges on the light coupling-in surface of the optical waveguide assigned thereto;

wherein the light coupling-out surfaces of the optical waveguides are arranged in a matrix-like manner;

wherein the light coupling-in surface of the respective optical waveguide is smaller than the light-emitting surface of the at least one semiconductor light source assigned to said optical waveguide, and a grating-like optical diaphragm having grating cells is provided, which is arranged in the region of the light coupling-in surfaces of the optical waveguides, such that light coupling-in surfaces belonging to different optical waveguides are arranged in different grating cells of the grating-like optical diaphragm.

2. The lighting device of claim 1,

wherein the grating-like optical diaphragm has blackened surfaces.

3. The lighting device of claim 1,

wherein the grating-like optical diaphragm is designed as part of a mount for the optical waveguides.

4. The lighting device of claim 1,

wherein the optical waveguides are connected to one another in the region of their light coupling-out surfaces.

5. The lighting device of claim 4,

wherein the optical waveguides are connected to one another in the region of their light coupling-out surfaces by a common transparent cover.

6. The lighting device of claim 1,

wherein the light coupling-out surfaces of neighboring optical waveguides are arranged alongside one another without gaps.

7. The lighting device of claim 1,

wherein the light coupling-out surfaces of the optical waveguides are embodied in a quadrilateral or hexagonal fashion.

8. The lighting device of claim 1,

wherein the optical waveguides are embodied in a conical fashion, such that the light coupling-in surface is arranged at a conically tapered end of the optical waveguide and the light coupling-out surface is arranged at a conically widened end of the optical waveguide.

9. The lighting device of claim 1,

wherein the optical waveguides are designed as Total Internal Reflection optical units.

10. The lighting device of claim 1,

wherein the surface of the optical waveguides is embodied in a reflectively coated fashion outside the light coupling-in surface and the light coupling-out surface.

11. The lighting device of claim 1,

wherein the lighting device comprises at least one optical lens which is disposed downstream of the light coupling-out surfaces of the optical waveguides with respect to the beam path of the light emitted by the semiconductor light sources.

12. The lighting device of claim 1,

wherein the lighting device is designed as part of a vehicle headlight.

13. A lighting device, comprising:

a plurality of light sources; and

a plurality of optical waveguides;

wherein the optical waveguides each have at least one light coupling-in surface and a light coupling-out surface;

wherein the light coupling-in surfaces of the optical waveguides are respectively arranged relative to a light-emitting surface of at least one light source, such that light emitted by the light-emitting surface of the at least one light source enters the optical waveguide via the light coupling-in surface assigned thereto;

wherein the light coupling-out surfaces of the optical waveguides are arranged in a matrix-like manner;

wherein the light coupling-in surface of the respective optical waveguide is smaller than the light-emitting surface of the at least one semiconductor light source assigned to said optical waveguide, and a grating-like optical diaphragm having grating cells is provided, which is arranged in the region of the light coupling-in surfaces of the optical waveguides, such that light coupling-in surfaces belonging to different optical waveguides are arranged in different grating cells of the grating-like optical diaphragm.