LED Light Module

• US 20110280031A1
• Filed: 05/12/2011
• Published: 11/17/2011
• Est. Priority Date: 05/12/2010
• Status: Active Grant

• Current Assignee: ZKW Group GmbH (LG Corporation)
• Original Assignee: Zizala Lichtsysteme GmbH (Zizala Vermögensverwaltungs- Und Beteiligungsges mbH)
• Inventors: Moser, Andreas, Luger, Andreas
• Granted Patent: US 8,936,381 B2
• Time in Patent Office: Days
• US Class Current: 362/520
• 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 41/285 Refractors, transparent cover plates, light guides or filters not provided in groups F21S41/24 - F21S41/2805
• CPC Class Codes: F21S 41/663 by switching light sources by switching incandescent light sources F21S41/162

Abstract

The invention relates to an LED light module for a motor vehicle, or for a headlight for a motor vehicle, wherein the light module comprises a lens and an LED light source, wherein according to the invention a diffusion disk is disposed between the LED light source and the lens as viewed in the light exit direction, wherein the diffusion disk has at least one aperture for the direct passage of at least one component of the light emitted by the LED light source, and wherein the direct component of the light emitted by the LED light source, which component emerges through the aperture of the diffusion disk, is projected through the lens so as to generate a lighting function in the region in front of the motor vehicle.

Claims

1. An LED light module for a vehicle headlight, the LED light module comprising:

a lens;

an LED light source that emits light; and

a diffusion disk disposed between the LED light source and the lens as viewed in a light exit direction, the diffusion disk having at least one aperture for the direct passage of at least one component of the light emitted by the LED light source;

wherein a direct component of the light emitted by the LED light source emerges through the aperture and is projected through the lens so as to generate a lighting function in a region in front of the vehicle headlight.

2. The LED light module of claim 1, characterized in that the LED light source is a primary light source having an emitted relevant luminous flux, wherein essentially the entire emitted relevant luminous flux of the primary light source emerges through the aperture so as to generate the lighting function.

3. The LED light module of claim 1, characterized in that the LED light source is a primary light source, the LED light module further including at least one additional LED light source as a secondary light source having emitted light rays and an emitted luminous flux, the secondary light source being arranged relative to the aperture in such a way that the emitted light rays of the secondary light source are emitted essentially onto the diffusion disk so that essentially no luminous flux from the secondary light source emerges through the aperture.

4. The LED light module of claim 3, characterized in that an axis running through the LED light source of the primary light source and the aperture forms an optical axis, wherein the at least one additional LED light source of the secondary light source does not lie along the optical axis.

5. The LED light module of claim 3, characterized in that the LED light module has a rear side opposing the lens, wherein the at least one additional LED light source of the secondary light source is displaced towards the rear side relative to the primary light source.

6. The LED light module of claim 3, characterized in that the secondary light source comprises two or more LED light sources.

7. The LED light module of claim 3, characterized in that the LED light source of the primary light source is controllable separately from the at least one additional LED light source of the secondary light source.

8. The LED light module of claim 3, further including a horizontal plane that runs through the LED light source of the primary light source, characterized in that when the LED light module is in an installed state in a vehicle headlight, the secondary light source has n LED light sources positioned vertically below the horizontal plane and m LED light sources positioned vertically above the horizontal plane, wherein m<

n.

9. The LED light module of claim 8, wherein m=0.

10. The LED light module of claim 8, further including a vertical plane that runs through the optical axis, characterized in that the LED light sources are arranged above or below the horizontal plane and symmetrically in the horizontal direction relative to the vertical plane.

11. The LED light module of claim 8, characterized in that the at least one additional LED light source of the secondary light source is disposed laterally adjacent to the LED light source of the primary light source.

12. The LED light module of claim 1, characterized in that the dimensions of the aperture and the position of the LED light source are selected in such a way that all of the light rays that are emitted by the LED light source that lie within an aperture angle of the lens can pass through the aperture.

13. The LED light module of claim 3, characterized in that the dimensions of the aperture and the position of the at least one additional LED light source of the secondary light source are selected such that the light rays emitted by the at least one additional LED light source of the secondary light source are emitted only into regions of the diffusion disk that have no aperture.

14. The LED light module of claim 13, characterized in that the dimensions of the aperture and the position of the at least one additional LED light source of the secondary light source are selected such that the light rays emitted by the secondary light source form the secondary light source up to the edge of the aperture.

15. The light module of claim 1, wherein the LED light source is an infrared light source.

16. The light module of claim 3, wherein the primary light source is an infrared light source.

17. The light module of claim 6, wherein the two or more LED light sources of the secondary light source are positioned in one plane with the LED light source of the primary light source.

18. The light module of claim 1, wherein an edge of the aperture tapers downwardly in the direction of the LED light source.

19. The light module of claim 18, wherein the edge is trapezoidal.