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US 2012/0153314 A1Published application
Light signal
AssigneeSiemens Aktiengesellschaft
InventorsJoerg Birkholz, Rolf Eckl, Uwe Frost, Kay Marincic, Zeljko Marincic, Norbert Poepplow
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Abstract
A light signal contains a semiconductor light source and a convex lens system for representing signal aspects, especially on rail-bound traffic routes. In order to eliminate the need for monochrome semiconductor light sources, the semiconductor light source is a white point light source. A signal aspect-specific color filter is provided in the aperture region of the point light source.
Claims6
1-4. (canceled)
A light signal, comprising:
- a semiconductor light source being a white point light source defining an aperture region;
- a converging optical unit for defining signal properties;
- and
- at least one signal-aspect-specific color filter disposed in said aperture region of said white point light source.
1 more element
Dependencies are inferred from the claim text.