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US 8,702,282 B2Granted
Light signal
AssigneeSiemens Aktiengesellschaft
InventorsJoerg Birkholz, Rolf Eckl, Uwe Frost, Kay Koester, Zeljko Marincic, Norbert Poepplow
Life of this patent
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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.
Claims4
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, said converging optical unit being a common converging optical unit assigned to the signal properties;
- at least one signal-aspect-specific color filter disposed in said aperture region of said white point light source, said signal-aspect-specific color filter being a polycarbonate color filter film;
- an automatic changer for positioning said signal-aspect-specific color filter into the aperture region of said white point light source;
- and
- said white point light source being a common point light source and the signal properties are assigned said common point light source, said common point light source having a light emitting diode (LED) selected from the group consisting of a white LED and a white, high-current LED.
3 more elements
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, said converging optical unit being a common converging optical unit assigned to the signal properties;
- at least one signal-aspect-specific color filter disposed in said aperture region of said white point light source, said signal-aspect-specific color filter being a polycarbonate color filter film;
- an automatic changer for positioning said signal-aspect-specific color filter into the aperture region of said white point light source;
- and
- said white point light source having only a single light emitting diode (LED) selected from the group consisting of a single white LED and a single white, high-current LED.
3 more elements
Dependencies are inferred from the claim text.