DE8710619U1 - Display device for marking buildings - Google Patents

Description

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TELEFUNKEN electronic GmbH Theresienstrasse 2, 7100 Heilbronn

Heilbronn, 20.05.1987 E7-HN-Ko/ha - HN 87/16

Display device for marking buildings

The invention relates to a display device for marking buildings.

Display devices have been known for a wide range of applications for many years, with the marking of buildings only comprising a small area of the wide range of applications. In most cases, such marking is done using concrete symbols, such as numbers and letters. Since the symbols created in this way cannot be seen in the dark, illuminated symbols are used to mark buildings. In most cases, these are realized using a frosted glass body illuminated from the inside with black numbers or letters and an electronic twilight switch.

A disadvantage of these previously known illuminated display devices is high energy consumption, which requires the illuminated display device to be switched off when the ambient brightness is sufficient, whereby this further increases the technical complexity of such a display device and also leads to high manufacturing costs/

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In addition, the susceptibility to failure of these well-known display devices is important, and in particular the short lifespan of the lighting system should be mentioned.

The invention is based on the object of eliminating the above-mentioned disadvantages in a display device of the type mentioned at the outset and of creating a display device with low power consumption, high reliability and low manufacturing costs.

This object is achieved according to the invention in a display device for marking buildings of the type described at the outset in that several light-emitting diodes are arranged on or in an objectively designed symbol carrier in such a way that the light-emitting diodes reproduce the symbol.

Since the power consumption of the system according to the invention is very low (approx. 1 watt per digit), a twilight switch is not required. Furthermore, this display device is characterized by a high level of reliability, with the very long burning time of the LEDs contributing in particular. In addition, only a simple power supply is required, which can be designed as either a direct current or an alternating current system, whereby many voltage or current ranges can be selected by simple series or parallel connection.

Further advantageous embodiments of the invention emerge from the subclaims.

Embodiments of the invention will be described in more detail with reference to the following drawings.

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Figures 1 - 3 show examples of the invention.

Figure 1a shows a display device consisting of two digits, wherein, according to the invention, the light-emitting diodes 1 reproduce the symbol "1" and "0" on the symbol carrier 2. The light-emitting diodes 1 are fastened in the openings 3 of the symbol carrier 2 according to Figure 1b in such a way that the connections 4 on the back of the symbol carrier 2 can be connected to a power supply. The symbol carrier 2 can be made of plastic, metal or another suitable material. In this way, the symbol shown in Figure 2 is also reproduced by the light-emitting diodes 1. In Figure 3a, the letter "a" is symbolically reproduced with light-emitting diodes 1. The sectional view of the display device according to Figure 3a shown in Figure 3b shows the embedding of the light-emitting diodes 1 in the symbol carrier 2, which is designed as a cast or injection-molded body, where the material of the symbol carrier 2 can have the same optical properties as the glass body of the light-emitting diodes 1. As a result, the symbol carrier 2 is evenly illuminated, in contrast to the embodiment according to Figure 1 and not, as there, by point-shaped light sources. In this embodiment too the connections 4 of the light-emitting diodes 1 are on the back.

side of the symbol carrier 2 in order to connect it to the |

power supply. Furthermore, the color of the LEDs 1 used for the display device can be selected according to the existing design.

forms for light-emitting diodes can be selected.

Claims (4)

TELEFÜhl)<EN electronic GmbH Theresienstr. 2, 7100 Heilbronn Heilbronn, 09.10.1987 &Egr;&Iacgr;&idiagr;&Kgr;&ogr;-sr X 8917 Protection claims 1.) Display device for marking buildings, characterized in that several light-emitting diodes (1) are arranged on or in an object-shaped symbol carrier (2) in such a way that the light-emitting diodes (1) reproduce the symbol. 2.) Display device according to claim 1, characterized in that the symbol carrier (2) consists of plastic or metal. 3.) Display device according to one of the preceding claims, characterized in that the light-emitting diodes [I] are arranged in passages (3) of the symbol carrier (2) in such a way that the connections f4J of the light-emitting diodes (1) can be electrically connected to the rear side of the symbol carrier (2). 4. ) Display device according to one of the preceding claims, characterized in that the light-emitting diodes (1) are embedded in a cast or injection-molded body and the connections (U) of the light-emitting diodes (1) lead out at the rear of the cast and injection-molded bodies.