Light Guiding Device

Patent metadata

Field	Value
Publication number	US-2016209000-A1
Application number	US-201615000733-A
Country	US
Kind code	A1
Filing date	Jan 19, 2016
Priority date	Jan 19, 2015
Publication date	Jul 21, 2016
Grant date	—

Abstract

A light guiding device for an illumination device, especially for a motor vehicle or an indicator device in a rearview device of a motor vehicle includes a light coupling side for incoupling light from a light source, a reflection side having a reflection layer; and a light outcoupling side, which is disposed generally opposite the reflection side. A clearance between the reflection side and the light outcoupling side generally decreases as the distance from the light incoupling side increases. The reflection side having the reflection layer is configured so that light arriving from the light incoupling side is deflected to the light outcoupling side. The reflection layer may be a paint or lacquer layer that is imprinted or evaporation-coated on the reflection side.

First claim

What is claimed is:

1 . A light guiding device for an illumination device, especially for a motor vehicle or an indicator device in a rearview device of a motor vehicle, comprising:
a. a light incoupling side for incoupling light from a light source; b. a reflection side having a reflection layer; and c. a light outcoupling side, which is disposed generally opposite the reflection side,
wherein a clearance between the reflection side and the light outcoupling side generally decreases as the distance from the light incoupling side increases and the reflection side having the reflection layer is configured so that light arriving from the light incoupling side is deflected to the light outcoupling side, and
the reflection layer is a paint or lacquer layer that is imprinted or evaporation-coated on the reflection side.

2 . The light guiding device according to claim 1 , wherein the reflection layer at least partially comprises the same or different material than the rest of the light guiding device.

3 . The light guiding device according to claim 1 , wherein the reflection layer is white.

4 . The light guiding device according to claim 1 , further including a color layer wherein the color layer has a heat resistance of around −40° C. to +115° C.

5 . The light guiding device according to claim 1 , wherein at least one of the reflection side and the reflection layer is configured at least partially step-like or wave-like.

6 . The light guiding device according to claim 1 , wherein the light incoupling side and the light outcoupling side are configured flat and these surfaces are arranged essentially orthogonal to one another.

7 . The light guiding device according to claim 1 , wherein the light guiding device is embodied so that light coupled into the light guiding device and/or reflected and/or outcoupled experiences no change in color or a change in color, especially to red or yellow or green.

8 . The light guiding device according to claim 1 , wherein arrangement of one or a plurality of color filters on the light incoupling side and/or the reflection side and/or the reflection layer and/or the light outcoupling side and/or inside the light guiding device to achieve a change in color.

9 . The light guiding device according to claim 8 , wherein light from a light source, which emits white light, is outcoupled colored from the light guiding device in at least one of red or yellow or green.

10 . The light guiding device according to claim 1 , further comprising a holding device for tight or loose assembly onto a printed circuit board.

11 . An illumination device, especially for a motor vehicle or an indicator device of a rearview device of a motor vehicle, comprising a light guiding device according to claim 1 and a printed circuit board having at least one light source, wherein the light source is arranged relative to the light guiding device so that the light emitted by the light source onto the light incoupling side of the light guiding device is incoupled therein.

12 . A method for producing a light guiding device comprising the following steps:
preparing a base body having a light incoupling side, a reflection side and a light outcoupling side, which is generally disposed opposite the reflection side; and imprinting or evaporation coating of a reflection layer in the form of a paint or lacquer layer on the reflection side.

13 . The method according to claim 12 , including a step of arranging the reflection layer onto the base body by way of presswork, especially pad printing, with the optional use of cover templates.

14 . The method according to claim 12 , wherein the step of imprinting or evaporation coating the reflection layer includes preparing the reflection layer out of a first material and the step of preparing the base body includes preparing the base body out of a second material.

15 . A rearview device for a motor vehicle having a rearview reflection surface, an illuminant and a light guiding device according to claim 1 , especially for an indicator of a blind spot monitor, wherein the light guiding device, light source and rearview reflection surface are arranged together in such a way that the light guiding device deflects the light emitted by the light source to a side of the rearview reflection surface facing away from the driver of the vehicle.

16 . The rearview device according to claim 15 , wherein one region of the rearview reflection surface comprises a non-reflecting or partially reflecting part, especially a pictogram, which is backlit by the light source and the light guiding device.

Assignees

• Smr Patents Sarl

Inventors

• Kürschner Norbert
• Fritz Daniel

Classifications

• G02B6/0078

  Side-by-side arrangements, e.g. for large area displays · CPC title

• F21S43/249

  with two or more light sources being coupled into the light guide · CPC title

• B60R1/1207

  with lamps; with turn indicators · CPC title

• F21S43/315

  using total internal reflection · CPC title

• G02B6/0055

  Reflecting element, sheet or layer · CPC title