JPS63184190A - Wireless paging display device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to an improvement in a wireless call display device using weak radio waves.

[Background technology]

This type of wireless call display device is used as a service call in coffee shops, restaurants, and other places. The system is designed to provide convenience for Chinese customers by displaying a lighted display indicating the call location.

FIG. 4 shows the basic configuration of a conventional wireless call display device of this type. The display signal containing the address code assigned to the address code is demodulated and converted into an electrical signal, and the display signal output at this time is decoded by the display unit 2, which incorporates an individual CPU, and assigned to the address code. If the address code matches the address code, an indicator light corresponding to the called location will be lit. However, in such a wireless paging display device, the receiver 1 on the display 2 side
Since the display signal with the address code set output from the CPU is independently decoded by each CPU, the scan timing of each CPU is different. Therefore, when connecting multiple displays set to the same address to a single receiver and configuring all displays to display the same call, it is necessary to If a radio wave signal or the like is affected by noise during transmission and a portion of the display signal is lost, each display may display a different display, and improvements are desired.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide a wireless paging display device that can solve the above-mentioned problems at a low cost and that has fewer malfunctions even when the system scale is expanded.

[Disclosure of the invention]

The present invention is proposed to achieve the above objects,
A wireless call display device having the following configuration is proposed.

That is, this wireless call display device receives a modulated radio wave signal of a display signal with a preset address code transmitted from a transmitter, demodulates the received radio wave signal, converts it into a display signal, and outputs it. and a display device that is provided in correspondence with the address code and is driven in accordance with the display signal output from the receiver to display a display corresponding to the location of the call. The improvement is that the display device is constructed by combining the current display unit and the child display unit, and the current display unit is called by decoding the display signal output from the receiver. The other child display unit can be detachably connected to the current display unit, and is driven in response to display signals from the current display unit to display the same display as the current display unit. It has an eggplant structure.

〔Example〕

An embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows the basic configuration of the present invention, and shows 1
is a receiver, 2 is a current display unit with an address code set, and 3 is a plurality of child display units connected to each current display unit 2 .

In the wireless call display device of the present invention having such a configuration, each current display unit 2 is provided with a CPU, which decodes and processes the display signal demodulated and sent out from the receiver 1. At the same time, the child display unit 3 connected to the parent display unit 2 performs the necessary display.
The configuration is such that a similar drive signal is sent to the display unit 2 to display the same display as the current display unit 2.

That is, when the receiver 1 receives a display signal attached with an address code from a transmitter (not shown) in the form of a radio wave signal, the receiver 1 demodulates it into an electrical signal and outputs the display signal. In the current display unit 2, when the address code of this display signal matches the code set for itself, the current display unit 2 sends the decoded drive signal to its own display section and the plurality of child display units connected to the current display unit. This causes the display on all display units to fail.

When such a display device is configured using the 4-frequency AFSK method, for example, 6
If you allocate bits and use 4 bits as an address code and the remaining 2 bits as a control signal, there will be 256 types of address codes and 256 current display units can be specified.
Further, eight display sections can be set in each current display unit, and each display section can be controlled to turn on and off.

FIG. 2 shows a side view of the external configuration of the current display unit 2 and the child display unit 3. Referring to this figure, the current display unit 2 has a base program 20 and eight display locations. The base block 20 is configured by combining an input terminal 20a into which an electric signal sent from the receiver 1 is input, and a display window block 21 provided with a display window block 21, and outputs a drive signal to the child display unit 3. A connection terminal 20 that outputs a display signal to the output terminal 20b and the display window block 21
It has c. Note that 20d is an output terminal to another parent display unit.

Similarly, the child display unit 3 is also attached to the base block 30.
The base block 30 has an input terminal 30a that receives a drive signal from the parent display unit 2.

It has an output terminal 30b that outputs a drive signal to other child display units 3... and a connection terminal 30c that outputs a drive signal to the display section 31, and these parent display units 2 have a plurality of child displays. The units 3... are connected to corresponding terminals by signal lines via connectors or the like. In addition, each base block 20 and 30 of each parent and child display unit 2゜3 is
They are detachably connected to the corresponding display window blocks 21, 31 via signal lines 4 provided with connectors.

Figure 3 shows a display example of the display window block.
” is lit.

According to such a configuration, even when displaying the same display on the display units, the scan timing of each display unit will not deviate and all displays will fail, so there is no fear that the displays will be inconsistent.

FIG. 5 shows another configuration of a call display device used when displaying the same display on a display unit as a display device, in which a CPU is provided in the receiver 1. The receiver 1 is configured to demodulate and decode a radio signal transmitted from a transmitter (not shown) using the n-frequency AFSK method, and the radio signal received via the antenna 1a is sent to the front end circuit 10. through the detection circuit 11
After the wave is detected in n filter circuits 12a=
12n, which is further converted into a pulse signal by waveform shaping circuits 13a to 13n, and decoded by the CPU 14. As a result of this decoding, the CPU 14 displays the display unit)
Display signals are output to the display units 2a, 2b, 2a, 2b, 2c, and so on.

In 2C, the necessary display is made.

In such a configuration, the display signal processed by the receiver 1 is
2a, 2b from the CPU to each display unit in the form of a double code
, 2c, . . . , the display units 2a, 2b, 2c that receive this signal either display or not, and each display unit 2a, 2b, 2c, .
There is no mismatch in the display of *, and since a commercially available and inexpensive LSI can be used as the display unit, the cost of the device can be reduced.

Figure 6 shows the conventional configuration corresponding to Figure 5.
It can be seen that in the display vt position shown in FIG. 5, the wiring can be simplified compared to the conventional one. , 2b... required five wires including the ground line, but the device shown in Figure 5, which processes double codes, requires only two wires including the ground line, so the configuration of the device is is simplified.

Further, FIG. 7 shows the configuration of an electronic chime that is suitably used when outputting a plurality of calling signals, for example, in a wireless calling device.

When driving a plurality of electronic chimes using a transistor drive circuit, the drive voltage of each transistor may be different. FIG. 8 shows that in such a case, the bases of transistors 4a and 5a provided in each of two electronic chimes 4.5 with different drive voltages Vl and V2 (Vl>V2) are commonly connected to one terminal 6. A drive contact (not shown) is connected between this terminal 6 and a separately provided terminal 7 whose other end is grounded.
The figure shows a configuration in which the transistors 4a and 5a are driven all at once by a simple method by shorting them with the A loop current may flow from the drive voltage v1 side to the lower level drive voltage v2 side via the base side circuits of the transistors 4a and 5a, causing problems such as making an electronic chime ring.

What is proposed here is to eliminate this inconvenience, and includes a diode 8 for backflow prevention on the base side of the transistors 4a and 5a provided in each of the electronic chimes 4.5.
．． 8 are connected to each other in pairs, and when a plurality of electronic chimes are connected, a diode for backflow prevention is provided for each electronic chime.

〔Effect of the invention〕

As can be understood from the above description, according to the wireless call display device of the present invention, when a plurality of display units are connected to one receiver and the same display is made, the display contents may not match. Therefore, it is possible to provide a highly reliable wireless call display device.

[Brief explanation of the drawing]

The first part is a block diagram showing the basic configuration of the present invention, the second part is a block diagram showing the basic configuration of the present invention.
3 is an explanatory diagram of the display window block, FIG. 4 is a block diagram showing the basic configuration of a conventional wireless call display device, and FIG. Figure 6 is a configuration diagram of an improved wireless display device, Figure 6 is a configuration diagram of a conventional wireless call display device corresponding to Figure 5, Figure 7 is a configuration diagram of an improved electronic chime, and Figure 8 is a configuration diagram of a conventional wireless call display device. A configuration diagram of an electronic chime is shown. (Explanation of symbols) l... Receiver 2... Parent display unit 3... Child display unit

Claims (2)

[Claims] (1) A receiver that receives a display signal containing an address code transmitted from a transmitter as a radio signal, demodulates the received radio signal, converts it into a display signal, and outputs it, and a receiver that is installed in correspondence with the address code. In a wireless call display device that is combined with a display that is driven in response to a display signal output from the receiver to display a display corresponding to the location of the call, the display is connected to an address code. A parent display unit is provided correspondingly and decodes the display signal output from the receiver to display a display corresponding to the called location; A wireless call display device characterized in that it has a configuration in which a child display unit that is driven in response to a display signal and produces a display similar to a parent display unit is combined. (2) The receiver is configured to receive a radio wave signal transmitted from a transmitter, demodulate this signal, decode a display signal, and drive a display device. 1) The wireless call display device described in item 1).