Siemens Aktiengesellschaft

Siemens Mobility Gmbh

Consiglio Nazionale Delle Ricerche

Volker Türck

Axel Beier

Stefan Nerreter

Martin Franke

Diederik Sybolt Wiersma

Silvia Vignolini

Francesca Intonti

An optical system () for a light emitting diode (LED) signal includes a plurality of light emitting diodes (LEDs) (), a plurality of optical lenses () for diverging and collimating light generated by the plurality of LEDs (), wherein the plurality of LEDs () and the plurality of optical lenses () are sequentially arranged in an axial direction, and wherein the plurality of optical lenses () are configured such that by altering an axial position of one of the optical lenses () from a first defined axial position to a second defined axial position, a final angular light distribution of the optical system () is variable.

Optical system for a LED signal and wayside LED signal

A display element and a display device in which the display element is mounted. The display may be a variable message sign. The sign includes a tube-like housing in which lenses and apertures can be disposed. The light exiting a light source is emitted via an emitting surface, by way of which an illuminated traffic sign results from interacting with further display elements. The light source and the optical elements are disposed at different heights in the horizontally oriented housing. The optical axes can thereby extend horizontally, or the optical elements can lie on a main axis which is tilted downward in an radiation direction. In both cases, sunlight impinging from above at an angle advantageously falls on the LED to a slight degree, by way of which the phantom light phenomenon is minimized.

Optical display element and display device

Growing community of inventors

Berlin, Germany

Volker Türck