Projection device, rear-view device and motor vehicle

Patent metadata

Field	Value
Publication number	US-10995929-B2
Application number	US-201816633813-A
Country	US
Kind code	B2
Filing date	Jul 25, 2018
Priority date	Jul 27, 2017
Publication date	May 4, 2021
Grant date	May 4, 2021

Abstract

A projection device for projecting an optical information, in the form of a logo or warning signal, onto a projection surface, includes a light source that has an emission maximum at a first wavelength, a mask disposed in the beam path of the light source, with at least one opening providing the optical information, and at least one optical lens disposed in the beam path. The mask and/or the lens may have a coating with at least one illuminant, the excitation wavelength of which corresponds to the first wavelength and which emits light with at least one second wavelength. A rearview device and a motor vehicle may also include the projection device.

First claim

What is claimed is:

1. A motor vehicle illumination device with at least one projection device which is part of a rearview device comprising one or more of an exterior mirror or an exterior camera holder of a motor vehicle, the motor vehicle illumination device being designed for projecting an optical information in form of a logo or a warning signal onto a projection surface outside of the motor vehicle, the motor vehicle illumination device comprising:
a light source comprising an emission maximum at a first wavelength;
a mask disposed in the beam path of the light source with at least one opening providing the optical information; and
at least one optical lens disposed in the beam path,
wherein the mask has a coating with at least one illuminant, the excitation wavelength of which corresponds to the first wavelength and which emits light with at least one second wavelength.

2. The motor vehicle illumination device according to claim 1 , wherein the coating contains phosphor as illuminant.

3. The motor vehicle illumination device according to claim 1 , wherein the light source comprises at least one blue laser diode or one blue light-emitting diode or emits UV light.

4. The motor vehicle illumination device according to claim 1 , wherein an emission spectrum emitted by the coating appears essentially white to an observer when excited by the light source.

5. The motor vehicle illumination device according to claim 1 , wherein the at least one lens comprises a display lens in the beam path after the mask, and
a collimator lens is disposed in the beam path between the light source and the mask when the light source comprises that least one blue light-emitting diode.

6. The motor vehicle illumination device according to claim 1 , wherein the coating is:
disposed on a side of the mask facing towards the light source,
disposed on an opposite side of the mask, or
disposed on both sides of the mask and the mask is partially optically transparent.

7. The motor vehicle illumination device according to claim 1 , wherein the projection device is provided to project the optical information as a logo light, as a warning light, an approach light, a searchlight, a display, a ground light, a puddle light, a flashlight, a position light, an emergency light, an acceleration light, a view light, decorative information, advertising information, a manufacturer's logo, or a warning triangle onto a projection surface.

8. A motor vehicle with at least one motor vehicle illumination device according to claim 1 , wherein the projection surface is provided by a ground such as a road lane surface adjacent to the motor vehicle.

9. The motor vehicle illumination device according to claim 1 , wherein the at least one lens also has a coating with at least one illuminant, the excitation wavelength of which corresponds to the first wavelength and which emits light with at least one second wavelength.

10. The motor vehicle illumination device according to claim 5 , wherein at least one of the display lens and the collimator lens also has a coating with at least one illuminant, the excitation wavelength of which corresponds to the first wavelength and which emits light with at least one second wavelength.

Assignees

• Smr Patents Sarl

Inventors

• Meier Eugen

Classifications

• G03B21/001

  Slide projectors · CPC title

• B60R1/06

  mounted on vehicle exterior {(B60R1/025, B60R1/08 take precedence)} · CPC title

• B60R2011/004

  outside the vehicle · CPC title

• F21W2103/60

  Projection of signs from lighting devices, e.g. symbols or information being projected onto the road · CPC title

• G03B21/204

  using secondary light emission, e.g. luminescence or fluorescence (using different colours G03B33/00; if related to video signals H04N9/3197) · CPC title