Spreading feature for automotive rear fog lighting

Patent metadata

Field	Value
Publication number	US-11828430-B2
Application number	US-202218080439-A
Country	US
Kind code	B2
Filing date	Dec 13, 2022
Priority date	Dec 13, 2021
Publication date	Nov 28, 2023
Grant date	Nov 28, 2023

Abstract

A light spreading lens, an automotive lighting system, and method of manufacturing a light spreading lens are described. The light spreading lens includes an outer surface. The outer surface is defined by a Boolean intersection of a first cylindrical lens overlaid with a second cylindrical lens. The first cylindrical lens is configured to distribute light along a first axis. The second cylindrical lens is configured to distribute light along a second axis.

First claim

What is claimed is:

1. A light spreading lens comprising:
an outer surface defined by a Boolean intersection of a first cylindrical lens configured to distribute light along a first axis overlaid with a second cylindrical lens configured to distribute light along a second axis such that the outer surface includes surface portions including shapes of the first cylindrical lens and the second cylindrical lens, wherein the outer surface is a light exit surface of the light spreading lens.

2. The light spreading lens according to claim 1 , wherein a depth of the light spreading lens runs parallel to a third axis.

3. The light spreading lens according to claim 1 , wherein the first axis and the second axis are substantially perpendicular.

4. An automotive lighting system comprising:
at least one light emitting diode (LED);
at least one collimating structure adjacent to the at least one LED; and
a light spreading structure adjacent to the at least one collimating structure, the light spreading structure comprising:
a plurality of light spreading lenses mechanically coupled together, each light spreading lens of the plurality of light spreading lenses comprising:
an outer surface defined by a Boolean intersection of a first cylindrical lens configured to distribute light along a first axis overlaid with a second cylindrical lens configured to distribute light along a second axis, wherein the outer surface of each of the plurality of light spreading lenses is a light exit surface for light emitted by the at least one LED.

5. The system according to claim 4 , wherein the plurality of connected light spreading lenses is arranged in rows and columns.

6. The system according to claim 4 , wherein the first axis of each light spreading lens is at least one of aligned and parallel to the first axis of a connected one of the plurality of light spreading lens.

7. The system according to claim 4 , wherein the second axis of each light spreading lens is at least one of aligned and parallel to the second axis of a connected one of the plurality of light spreading lenses.

8. A method of manufacturing a light spreading lens comprising:
cutting an outer surface of a lens material in a shape defined by a Boolean intersection of a first cylindrical lens configured to distribute light along a first axis overlaid with a second cylindrical lens configured to distribute light along a second axis such that the outer surface includes surface portions including shapes of the first cylindrical lens and the second cylindrical lens, wherein the outer surface is a light exit surface of the light spreading lens.

9. The method of claim 8 further comprising:
generating the shape in a computer program by:
positioning a computer-generated representation of the first cylindrical lens along the first axis with a first vertex of the first cylindrical lens running parallel along the first axis,
positioning a computer-generated representation of the second cylindrical lens along the second axis with a second vertex of the second cylindrical lens running parallel along the second axis,
combining the computer-generated representation of the first cylindrical lens and the computer-generated representation of the second cylindrical lens by overlaying the computer-generated representation of the first cylindrical lens and the computer-generated representation of the second cylindrical lens on a common footprint, and
performing a Boolean intersection of the combined computer-generated representation of the first cylindrical lens and the second cylindrical lens.

Assignees

• Lumileds Llc

Inventors

• Timinger Andreas

Classifications

• F21S2243/00

  Manufacturing details of signalling devices specially adapted for vehicle exteriors · CPC title

• F21S43/26241

  diffusing, scattering or spreading · CPC title

• F21S43/26231

  collimating, focusing, condensing or projecting beams, e.g. projection lenses or Fresnel lenses · CPC title

• F21W2103/40

  Rear fog lights · CPC title

• B29D11/00019

  with non-spherical faces, e.g. toric faces · CPC title