DE7527487U - SOUND MODULATED LIGHT TRANSMITTER IN MESSAGE DEVICES - Google Patents

Description

The innovation relates to a sound-modulated light transmitter in communications equipment. It is known that such light transmitters, which emit sound-modulated light in the infrared region, are used to wirelessly transmit the sound received from a television or radio device to headphones, in which there is a corresponding receiver that responds to the light signals. The light transmitter is built into the front surface of the communication device facing the listener by sending the light bundled in the vertical direction through an opening in the front surface.

Now in communication devices, especially in radio devices, the surface facing the listener is occupied by the installation of dial surfaces, voting displays, touch fields of the sensor electronics in such a way that the attachment of the light transmitter and, in the case of stereo transmission, two light transmitters becomes problematic, especially since the

Development towards narrowing front sections
<nonreadable>

The object of the innovation is to find an expedient and space-saving arrangement for the light transmitter of the type described above, without having to do without previous operating or display elements.

This object is achieved according to the invention in that the light transmitter is arranged behind the transparent graduated disk of the communication device that carries the transmitter markings.

With the help of Figures 1 and 2, the innovation is to be explained.

FIG. 1 shows a perspective view of the innovation and FIG. 2 shows the arrangement according to the innovation in section II-II of FIG.

With 1 on the front of the communication device is referred to essentially vertically arranged dial, on which the transmitter markings are applied by screen printing. E.g. to the side next to the dial are tuning display 2 and station display 3 as well as the display for stereo reception 4 appropriate. There are also sensor surfaces 5 on the side for electronic transmitter setting of transmitters permanently set in a memory. The tuning button 6 for continuous tuning and the receiver microphone 7 in the case of an ultrasonic remote control and the setting members 9 continue to narrow the space and it can be seen that with a very compact structure and narrow housing dimensions, the space for further operating elements or display elements is scarce.

To avoid this difficulty, the light transmitter 8 is arranged behind the graduated disk 1 at a suitable transparent point that is adapted to its contours. In the case of a receiving device for multi-channel signals, in particular, the same but differently modulated light transmitters can be arranged next to and / or one below the other in the same way.

In Figure 2, the arrangement of the light transmitter 8 is shown in section. The dial 1 carrying the transmitter markings has a dark background to increase the contrast of the transmitter markings with the aid of a layer 10 which is correspondingly recessed at the point where the light transmitter 8 is attached, so that the dial 1 is transparent to the infrared points at this point. In place of the recess there is a filter disk 11, which is only used by the

Light-emitting diodes 12 emitted infrared light is permeable. It is also possible that the layer 10 covering the rear side of the dial 1 consists of a material which is permeable to the infrared radiation, so that the light transmitters 8 remain invisible to the viewer.

Claims (1)

Sound-modulated light emitter consisting of light-emitting diodes arranged in front of a reflector for wireless transmission of the tone demodulated from the received signals by a communication device, characterized in that the light transmitter is arranged behind the transparent dial of the communication device carrying the transmitter markings.