Illumination device for a motor vehicle, in particular a high-resolution headlamp

Patent metadata

Field	Value
Publication number	US-11739902-B2
Application number	US-202217569200-A
Country	US
Kind code	B2
Filing date	Jan 5, 2022
Priority date	Jul 5, 2019
Publication date	Aug 29, 2023
Grant date	Aug 29, 2023

Abstract

An illumination device for a motor vehicle, in particular a high-resolution headlamp, comprising an imaging component with an active surface at which imaging elements are arranged in the manner of a matrix for the specific creation of pixels of a light distribution, projection optics by means of which the light coming from the active surface is projected into the space outside the motor vehicle in operation of the illumination device, wherein the illumination device has an aperture diaphragm with a variable opening width through which at least part of the light coming from the active surface can pass in operation of the illumination device.

First claim

What is claimed is:

1. An illumination device for a motor vehicle, in particular a high-resolution headlamp, the illumination device comprising:
an imaging component with an active surface at which imaging elements are arranged in the manner of a matrix to create pixels of a light distribution;
projection optics via which light coming from the active surface is projected into a space outside the motor vehicle in operation of the illumination device; and
an aperture diaphragm with a variable opening width through which at least part of the light coming from the active surface is adapted to pass in operation of the illumination device,
wherein the aperture diaphragm is arranged behind a first part of the projection optics and ahead of a second part of the projection optics in the propagation direction of the light coming from the active surface.

2. The illumination device according to claim 1 , wherein the aperture diaphragm is an iris diaphragm.

3. The illumination device according to claim 1 , wherein the illumination device includes a drive that has an electric motor, wherein the drive is adapted to change the opening width of the aperture diaphragm in operation of the illumination device.

4. The illumination device according to claim 1 , wherein the aperture diaphragm is arranged such that the light that has passed through the aperture diaphragm impinges on at least the second part of the projection optics and is projected therefrom into the space outside the motor vehicle.

5. An illumination device for a motor vehicle, in particular a high-resolution headlamp, the illumination device comprising:
an imaging component with an active surface at which imaging elements are arranged in the manner of a matrix to create pixels of a light distribution;
projection optics via which light coming from the active surface is projected into a space outside the motor vehicle in operation of the illumination device; and
an aperture diaphragm with a variable opening width through which at least part of the light coming from the active surface is adapted to pass in operation of the illumination device,
wherein the illumination device is designed such that the light projected into the space outside the motor vehicle at a first opening width of the aperture diaphragm has a first maximum illumination intensity as well as a first imaging quality, and wherein the light projected into the space outside the motor vehicle at a second opening width of the aperture diaphragm has a second maximum illumination intensity as well as a second imaging quality, wherein the first opening width of the aperture diaphragm is larger than the second opening width of the aperture diaphragm, wherein the first maximum illumination intensity is higher than the second maximum illumination intensity, and wherein the first imaging quality is poorer than the second imaging quality.

6. The illumination device according to claim 1 , wherein the imaging elements at the active surface are designed as light-emitting diodes or as laser diodes.

7. An illumination device for a motor vehicle, in particular a high-resolution headlamp, the illumination device comprising:
an imaging component with an active surface at which imaging elements are arranged in the manner of a matrix to create pixels of a light distribution;
projection optics via which light coming from the active surface is projected into a space outside the motor vehicle in operation of the illumination device; and
an aperture diaphragm with a variable opening width through which at least part of the light coming from the active surface is adapted to pass in operation of the illumination device,
wherein the imaging component is designed as a digital micromirror device or as an LCoS or as an LC display, or wherein the imaging component includes a digital micromirror device or an LCoS or an LC display.

8. The illumination device according to claim 1 , wherein the illumination device includes at least one light source, the light of which impinges on the imaging component and is selectively reflected or transmitted by the same imaging component in order to create the light distribution.

9. A method for operating an illumination device according to claim 1 , wherein the opening width of the aperture diaphragm is chosen to be larger for producing a high beam than for producing a symbol projection on the roadway.

10. The illumination device according to claim 1 , wherein the imaging component is a solid state LED array.

Assignees

• Hella Gmbh & Co Kgaa

Inventors

• Fischer Bernd
• Klarius Alexander

Classifications

• F21S41/663 Primary

  by switching light sources (by switching incandescent light sources F21S41/162) · CPC title

• F21S41/153

  arranged in a matrix · CPC title

• F21S41/25

  Projection lenses · CPC title

• F21S41/43

  characterised by the shape thereof · CPC title

• F21S41/683 Primary

  by moving screens · CPC title