Illumination device for a motor vehicle

Patent metadata

Field	Value
Publication number	US-10239441-B2
Application number	US-201414504495-A
Country	US
Kind code	B2
Filing date	Oct 2, 2014
Priority date	Apr 3, 2012
Publication date	Mar 26, 2019
Grant date	Mar 26, 2019

Abstract

An illumination device for a motor vehicle includes a light source constructed of a number of semiconductor diodes, and an optical device for generating a predefined light distribution from the light of the light source. The optical device is arranged in a housing. The illumination device is characterized in that the light source is rigidly connected to the housing. At least one optical waveguide is provided for guiding the light of the light source to the optical device.

First claim

What is claimed is:

1. An illumination device for a motor vehicle, comprising:
a housing;
a light source constructed of a number of semiconductor diodes and having a light emission end located within the housing or at an aperture in a wall of the housing;
an optical device separate from and arranged in the housing and arranged to be movable relative to the housing and to the light source by a rotational element extending between the optical device and an immediately adjacent inner wall of the housing, the optical device being designed to generate a predefined light distribution from light of the light source; and
at least one flexible optical waveguide located entirely within the housing between the light source and the optical device, the at least one flexible optical waveguide being designed to receive in the housing and guide the light of the light source to the optical device,
wherein
the light source is rigidly connected to a heat sink outside of the housing, and
an optical device end of the at least one flexible optical waveguide is located at the optical device in a manner such that there is no relative movement between the optical device and the optical device end when the optical device moves relative to the housing.

2. The illumination device according to claim 1 , wherein the number of semiconductor diodes comprises one or more laser diodes.

3. The illumination device according to claim 2 , wherein the number of semiconductor diodes comprises exclusively laser diodes.

4. The illumination device according to claim 1 , wherein the at least one flexible optical waveguide is an optical fiber cable.

5. The illumination device according to claim 1 , wherein the light source produces monochromatic light, the illumination device further comprising:
a conversion element arranged in the illumination device to convert the monochromatic light of the light source to white light.

6. The illumination device according to claim 5 , wherein the conversion element is arranged at one end of the at least one flexible optical waveguide, which one end is either adjacent to the light source or remote from the light source.

7. The illumination device according to claim 1 , further comprising:
a sensor that detects light intensity in the at least one flexible optical waveguide, the sensor being arranged at one end of the at least one flexible optical waveguide remote from the light source.

8. The illumination device according to claim 1 , wherein the light source is removably connected to the housing.

9. The illumination device according to claim 1 , wherein at least a portion of the light source extends outside of the housing.

10. The illumination device according to claim 1 , wherein
the heat sink is thermally coupled to a part of the motor vehicle that is cooler than the heat sink.

11. The illumination device according to claim 10 , wherein the heat sink comprises a cooling body having cooling ribs, fins and/or pins.

12. The illumination device according to claim 10 , further comprising:
a fan configured to produce an airflow at the heat sink.

13. The illumination device according to claim 12 , further comprising:
an air guide coupled with the heat sink, the air guide supplying air to the heat sink.

14. The illumination device according to claim 10 , further comprising:
an air guide coupled with the heat sink, the air guide supplying air to the heat sink.

15. The illumination device according to claim 1 , wherein the optical device is movable within the housing.

16. The illumination device according to claim 1 , wherein the optical device comprises a module configured to be removed as a whole from the illumination device.

17. The illumination device according to claim 1 , wherein the illumination device forms a headlight.

18. The illumination device according to claim 1 , wherein the illumination device forms an indicator light.

19. A motor vehicle, comprising:
one or more illumination devices, each illumination device comprising:
a housing;
a light source constructed of a number of semiconductor diodes and having a light emission end located within the housing or at an aperture in a wall of the housing;
an optical device separate from and arranged in the housing and arranged to be movable relative to the housing and to the light source by at least one rotational element extending between the optical device and an immediately adjacent inner wall of the housing, the optical device being designed to generate a predefined light distribution from light of the light source; and
at least one flexible optical waveguide located within the housing between the light source and the optical device, the at least one flexible optical waveguide being designed to receive in the housing and guide the light of the light source to the optical device,

wherein
the light source is rigidly connected to a heat sink outside of the housing, and
an optical device end of the at least one flexible optical waveguide is located at the optical device in a manner such that there is no relative movement between the optical device and the optical device end when the optical device moves relative to the housing.

Assignees

• Bayerische Motoren Werke Ag

Inventors

• Erdl Helmut
• Hanafi Abdelmalek

Classifications

• B60Q1/0064 Primary

  with provision for maintenance, e.g. changing the light bulb (swivel arrangements  B60Q1/0425) · CPC title

• F21S41/24

  Light guides · CPC title

• G02B6/0008

  the light being emitted at the end of the fibre · CPC title

• B60Q11/005

  for lighting devices, e.g. indicating if lamps are burning or not · CPC title

• F21S45/43

  using gas · CPC title