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Light signal

A signal machine and color lamp technology, applied in railway signal, visual signal, railway signal and safety, etc., can solve problems such as light loss

Inactive Publication Date: 2005-06-08
SIEMENS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, merely replacing the incandescent lamp with, for example, an LED device results in light losses in solid angles that are important for signal display

Method used

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Embodiment Construction

[0013] FIG. 1 shows the construction principle of an incandescent signal as a prior art. The coiled filament 1 of an incandescent lamp 2 is arranged here at the focal point of an optical system 3 with a focal length f1. A characteristic of the coiled filament 1 is that the light rays emitted by it form an emission cone 4 , the opening angle of which defines the diameter of the optical system 3 and its optical axis 5 . The optical system 3 is generally designed for Fresnel lens or aspherical lens shapes in such a way that it has a high light intensity for the long-range signal display and for the obliquely downward short-range signal display. At the same time, some parameters related to the installation site of the signal are also taken into account, such as the radius of curvature of the track at the installation site of the signal.

[0014] In order to also use this high-quality optical system for other light emitting devices that replace the incandescent filament 1, such as...

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Abstract

The signal unit consists of a lamp and a first optical system (3), and a second optical system (6) between the two. The focal point (9) of the second system mainly coincides with the light entry-sided focal point of the first system. The lamp is an LED unit, e.g. single LED with a focusing lens to form the second optical system, or an LED matrix (7) with a number of mainly similar LED modules (8), which define a mainly circular light surface.

Description

technical field [0001] The invention relates to a colored light signal machine, in particular to a luminescent signal machine or a colored light signal machine used for signal display on a rail transit route. Background technique [0002] On known color lamp signal machine, mainly adopt incandescent lamp as light-emitting device. Its rays are directed along a defined solid angle by means of an optical system. The optical system usually includes Fresnel lenses or aspheric lenses. The coiled filament of the incandescent lamp is located at the focal point on the incident light side of the lens. With the introduction of new types of light emitting devices, especially LED (Light Emitting Diode) based light emitting devices, it is increasingly necessary to replace incandescent lamps with modern light emitting devices. The problem is how to do the optical adaptation, because existing optical systems are only tuned to the special light emission characteristics of incandescent lam...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B61L5/18F21K99/00F21V5/04G08G1/095
CPCB61L5/1845B61L2207/02F21Y2115/10F21K9/69F21V5/04
Inventor 乔尔格·利布斯彻德克·齐默尔曼
Owner SIEMENS AG