Light Signal

Patent metadata

Field	Value
Publication number	US-10328958-B2
Application number	US-201615539293-A
Country	US
Kind code	B2
Filing date	Jan 5, 2016
Priority date	Jan 12, 2015
Publication date	Jun 25, 2019
Grant date	Jun 25, 2019

Abstract

A light signal, in particular for rail-bound traffic routes, includes a light source, an optical system and a control device for adjusting an emission characteristic. In order to improve the way optical parameters, in particular regarding brightness, phantom light and path geometry can be adjusted, the control device is configured to adjust the transmission properties of at least one smart glass element disposed in the luminous or light flux.

First claim

The invention claimed is:

1. A light signal usable for rail-bound traffic routes, the light signal comprising:
a light source having an emission characteristic and emitting light flux;
an optical system downstream of said light source;
at least one smart glass element disposed in the light flux;
at least one ambient light sensor; and
a control device configured for adjusting the emission characteristic of said light source and configured for transmission adjustment of said at least one smart glass element, said control device having a signal input side connected to said at least one ambient light sensor.

2. The light signal according to claim 1 , wherein said at least one smart glass element is provided for brightness adjustment and is disposed in a region of a light output opening.

3. The light signal according to claim 1 , wherein said at least one smart glass element includes a plurality of separate transmission-adjustable smart glass panels.

4. A light signal usable for rail-bound traffic routes, the light signal comprising:
a light source having an emission characteristic and emitting light flux;
an optical system downstream of said light source;
at least one smart glass element disposed in the light flux;
at least one extraneous light sensor; and
a control device configured for adjusting the emission characteristic of said light source and configured for transmission adjustment of said at least one smart glass element;
said control device having a signal input side connected to said at least one extraneous light sensor to measure phantom light; and
said control device having a control output side connected to said at least one smart glass element.

5. A light signal usable for rail-bound traffic routes, the light signal comprising:
a light source having an emission characteristic and emitting light flux;
an optical system downstream of said light source;
at least one smart glass element disposed in the light flux, said at least one smart glass element being disposed in an aperture segment of the light flux between said light source and said optical system; and
a control device configured for adjusting the emission characteristic of said light source and configured for transmission adjustment of said at least one smart glass element.

6. A light signal usable for rail-bound traffic routes, the light signal comprising:
a light source having an emission characteristic and emitting light flux;
an optical system downstream of said light source;
at least one smart glass element disposed in the light flux, said at least one smart glass element being disposed in an aperture segment of the light flux between said light source and said optical system, and said at least one smart glass element including a plurality of separate transmission-adjustable circular-segment shaped smart glass panel segments; and
a control device configured for adjusting the emission characteristic of said light source and configured for transmission adjustment of said at least one smart glass element.

7. The light signal according to claim 1 , wherein said at least one smart glass element protrudes into the light flux.

8. The light signal according to claim 7 , wherein said at least one smart glass element protrudes into a part of the light flux.

9. The light signal according to claim 1 , wherein said at least one smart glass element includes a plurality of smart glass elements protruding over different distances into the light flux.

Assignees

• Siemens Mobility GmbH

Inventors

• Eckl Rolf
• Koester Kay
• Marincic Zeljko

Classifications

• G08G1/095

  Traffic lights · CPC title

• B61L2207/02

  using light-emitting diodes [LEDs] · CPC title

• B61L5/1845 Primary

  Optical systems, lenses · CPC title

• F21V9/40

  with provision for controlling spectral properties, e.g. colour, or intensity · CPC title