Illumination device

Patent metadata

Field	Value
Publication number	US-10125940-B2
Application number	US-201515315759-A
Country	US
Kind code	B2
Filing date	May 13, 2015
Priority date	Jun 3, 2014
Publication date	Nov 13, 2018
Grant date	Nov 13, 2018

Abstract

Various embodiments may relate to an illumination device for vehicles, including multiple semiconductor light sources, and at least one light wavelength conversion element for the wavelength conversion of the light emitted by the semiconductor sources. At least one light-refracting optical unit is associated with each semiconductor source, which is designed to direct light emitted by the respective semiconductor source onto the at least one light wavelength conversion element. The at least one light-refracting optical unit is movably arranged with respect to the semiconductor source with which it is associated.

First claim

The invention claimed is:

1. An illumination device for vehicles comprising:
multiple laser diodes arranged on a common carrier,
at least one light wavelength conversion element for the wavelength conversion of
the light emitted by the multiple laser diodes,
the at least one light wavelength conversion element comprising a surface coated with a phosphor which is illuminable with light generated by the multiple laser diodes,
wherein at least one light-refracting optical unit is associated with each laser diode, wherein the at least one light-refracting optical unit is arranged on the common carrier and is configured to direct light emitted by the respective laser diode onto the at least one light wavelength conversion element,
wherein the at least one light-refracting optical unit is movably arranged with respect to the laser diode with which it is associated;
a movement device comprising a plurality of columns connected to the common carrier, the plurality of columns supporting the at least one light-refracting optical units,
wherein each column comprises at least one piezoelectric element configured to move the at least one light-refracting optical unit; and
a control unit for the movement device,
wherein the at least one light-refracting optical unit is movably arranged with respect to the laser diode with which it is associated, such that a zone of the surface coated with the phosphor is illuminable with light generated by more than one of the multiple laser diodes.

2. The illumination device as claimed in claim 1 , wherein the at least one light-refracting optical unit is designed to be pivotable, slidable, or rotatable, or pivotable and slidable, or pivotable and rotatable, or slidable and rotatable, or pivotable and slidable and rotatable.

3. The illumination device as claimed in claim 1 , wherein the illumination device further comprises an operating device for operating the multiple laser diodes.

4. The illumination device as claimed in claim 1 , wherein an optical unit is provided for imaging the light emitted by the at least one light wavelength conversion element.

5. A motor vehicle headlight comprising at least one illumination device,
the illumination device comprising:
multiple laser diodes arranged on a common carrier,
at least one light wavelength conversion element for the wavelength conversion of the light emitted by the multiple laser diodes,
the at least one light wavelength conversion element comprising a surface coated with a phosphor which is illuminable with light generated by the multiple laser diodes,
wherein at least one light-refracting optical unit is associated with each laser diodes, wherein the at least one light-refracting optical unit is arranged on the common carrier and is configured to direct light emitted by the respective laser diode onto the at least one light wavelength conversion element,
wherein the at least one light-refracting optical unit is movably arranged with respect to the laser diode with which it is associated;
a movement device comprising a plurality of columns connected to the common carrier, the plurality of columns supporting the at least one light-refracting optical units,
wherein each column comprises at least one piezoelectric element configured to move the at least one light-refracting optical unit; and
a control unit for the movement device,
wherein the at least one light-refracting optical unit is movably arranged with respect to the laser diode with which it is associated, such that a zone of the surface coated with the phosphor is illuminable with light generated by more than one of the multiple laser diodes.

Assignees

• Osram Gmbh

Inventors

• Hager Juergen
• Helbig Philipp
• Schwaiger Stephan
• Muster Jasmin

Classifications

• F21V14/06

  by movement of refractors {(in vehicle head lamps F21S41/635)} · CPC title

• F21Y2115/10

  Light-emitting diodes [LED] · CPC title

• B60Q1/0088

  Details of electrical connections (B60Q1/305 takes precedence; electrical connection of the light source itself F21S41/192, F21S43/195) · CPC title

• F21Y2105/10

  comprising a two-dimensional [2D] array of point-like light-generating elements · CPC title

• F21S41/635 Primary

  by moving refractors, filters or transparent cover plates · CPC title