JPS63266937A - Radio selective call receiver - Google Patents

Abstract

PURPOSE:To freely select the size of a display section while making the size of a receiver small by providing separately a reception section storing a message signal and the display section displaying the message signal. CONSTITUTION:The receiver 10 and a display section module 12 are connected electrically at terminals A, E. A signal received by a loop antenna 1 in the receiver 10 is demodulated by a radio section 2, converted into a rectangular wave at a waveform shaping circuit 3 and inputted to a decoder 4. A message data decoded by a message processing section 8 is stored in a memory 9 and drives an alarm device 7 via a buffer 6. The message data stored in the memory 9 in the receiver 10 is displayed on a display section 11 of a display module 12.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a radio selective calling receiver, and particularly to one that receives message information sent following a called number.

[Conventional technology]

Conventionally, this type of wireless selective calling receiver with a message has a small number of components (including a decoder for decoding an individual selective calling number, a message processing section having a CPU connected to this decoder, and a message processing section connected to this message processing section for receiving data). The device is integrated with a display section for displaying messages, and the stored messages are read out onto the display section by operating a readout switch provided on the device.

(Problems to be Solved by the Invention) In recent years, the development of device technology and microelectronics has been remarkable, and the demand for miniaturization and multifunctionality of devices is increasing. Under these circumstances, the above-mentioned conventional message-equipped radio selective calling receiver has a problem in that, although it only has a calling function, it is slow to improve its performance in terms of miniaturization.

[Means for solving problems]

The present invention has been made to solve these problems, and includes a first device equipped with a memory for storing message signals, and a second device equipped with a display section for displaying message signals. It is composed of

[For production]

The receiving section that stores the message signal and the display section that displays the message signal are separated.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram showing a first embodiment of the present invention.

In the figure, lO is a receiver 12 as a first device comprising a memory 9 for storing decoded message signals;
is a display section module as a second device equipped with a display section 11 that displays this message signal. Further, the receiver 10 and the display module 12 are electrically connected by a terminal A of the receiver 10 and a terminal B of the display module 12, and are mechanically integrated.

In the receiver lO, a built-in loop antenna l
The received signal is demodulated by the radio section 2, converted into a rectangular wave by the waveform shaping circuit 3, and inputted to the decoder 4. The decoder 4 compares the input signal with the data indicating the individual selective call number written in the ROM 5 in advance, and when a match is confirmed, the message processing section 8 is started and the message processing section 8 is activated to process the message data that is subsequently sent. Perform decryption. The data decoded from the message signal in this way is stored in the memory 9.
At the same time, the signal is stored in the buffer 6 and is used to drive an alarm device 7 consisting of a small alarm horn.

Note that the message processing section 8 is composed of a one-chip CPU (for example, μPD75108G manufactured by NEC, etc.), and the display section 11 is composed of a driver (for example, μPD7228G, manufactured by NEC, etc.) and an LCD.

In the display section module 12, the message data stored in the memory 9 in the receiver 10 is displayed on the display sections 1, 1, so that the received message data can be read out.

Further, in the configuration shown in FIG. 1, the display portion is removed from the device, so the size of the display module 12 can be changed depending on the function required of the receiving device. For this reason, when portability is important, it can be made as large as a card for convenient portability, and when emphasis is placed on processing message data, a circuit that supports large screens and large-scale message processing can be used. It can be made into a tabletop size that can store .

FIG. 2 is a block diagram showing a second embodiment of the present invention, and in this figure, the same or equivalent parts as in FIG. 1 are denoted by the same symbols, and the explanation thereof will be omitted.

In the figure, 14 denotes antenna 1. Radio section 2° shaping circuit 3. Decoder 4. ROM5. A receiver 16 is a first device consisting of a buffer 6 and an alarm device 7, and a display module 16 is a second device consisting of a message processing section 15 and a display section 11.

The memory 13 has a structure that is electrically and mechanically detachable from the receiver 14, and further has a structure that is electrically and mechanically detachable from the display module 16. Since the memory 13 is a removable RAM, an EEPROM is used as the device, and a Kerr 1 type is used as the shape to meet the miniaturization required for the device.

In the receiver 14, the signal received by the antenna l is demodulated by the radio section 2, converted into a rectangular wave by the waveform shaping circuit 3, and inputted to the decoder 4. In decoder 4, RO
The input signal is compared with the data indicating the individual selective calling number written in M5, and when a match is confirmed, the message data sent following the individual selective calling number signal is decoded, and this data is decoded. is stored in the memory 13 and drives the alarm device 7 via the buffer 6.

The memory 13 in which message data is stored is stored in the receiver 1
4 and is electrically and mechanically connected to and mounted on the display module 16.

In the display section module 16, the message data stored in the memory 13 is displayed on the display section 11 via the message processing section 15, so that the received message data can be read out. Note that the message processing section 15 has the same configuration as the message processing section 8 described above.

Furthermore, compared to the receiver 14 that receives radio frequency signals, which conventionally requires a power supply voltage of only about 1V, the message processing section 151 and display section 11 require a power supply voltage of about 3 to 5V. A dedicated power source must be provided to generate two types of power supply voltages, making the device large and expensive.

However, in the configuration shown in FIG. 2, these parts are separated, so a general-purpose, small, and inexpensive power supply device can be used, and the receiving device is also small.

We were able to make it cheaper.

Furthermore, in the receiving device of the conventional configuration, the system clock of the CPU included in the message processing section 15 is several hundred KH.
z to several MHz, and this system clock oscillates at a relatively high voltage compared to the receiver 14, which requires only about l■ power supply voltage. There was significant noise interference to 1.

However, in the configuration shown in FIG. 2 above, since the receiving part and the display part are separated, the receiver 14 can receive the radio frequency signal without being affected by noise, and the message can be transmitted. Propagates clearly and accurately.

FIG. 3 is a block diagram showing the third embodiment, and FIG. 4 is a perspective view of its specific appearance.

In the figure, reference numeral 20 denotes an antenna 21. Radio section 22. Decoder 23. Central processing unit 249
Display drive section 251 Display section 26. ROM27. RAM2B
, an interface 29, and a connector 30. As shown in FIG. 4, the receiver 20 is provided with guide rails 20a and 20b. Note that the radio unit 22 amplifies, frequency modulates, and demodulates the radio frequency signal received by the antenna 21, and the display drive unit 25 performs frequency modulation and demodulation on the radio frequency signal received by the antenna 21.
etc., and an individual selective call number is written in the ROM 27.

35 is an external storage device such as an IC card, and the receiver 20
A central processing unit similar to 32. RAM33 and connector 3
4, the guide rails 20a and 20
b, and the connector 34 is coupled to the connector 30.

Next, the operation of the radio selective calling receiver having the above configuration will be explained with reference to the flowchart shown in FIG.

First, when the message is received in step S, the radio unit 22 outputs the radio frequency signal received by the antenna 21 to the decoder 23. Therefore, decoder 23
encodes this demodulated signal, and then converts this encoded signal into RO
It compares it with the selective call number stored in M27, and when they match, it sends a defeat signal to the central processing unit 24. Now, if the function is not set in the memory by operating a switch (not shown) in step S2, the central processing unit 24 controls the display drive section 25 to display the message, so the display section 6 is driven and the message is displayed in step S3. . On the other hand, if the function is set in the memory by operating a switch (not shown), the message is stored in the RAM 8 in step S if the RAM 8 is not full in step S4. On the other hand, when this RAM 8 becomes full in step S and the external memory bag M35 is not inserted and connected to the radio selective calling receiver 20 in step S, the old message stored in the RAM 8 is erased in step S and a new message is created. Messages are accumulated. Further, when the external storage device 35 is connected to the wireless selective calling receiver 20 in step S8, the central processing unit 24 sends a signal indicating the connection to the central processing unit 24 in step S8. Therefore, in step S, this central processing unit 24 transfers the oldest message in RAM 2B to RAM 33 via central processing unit 32, while in step 5l, the new message is transferred to RAM 2B.
It is accumulated in 28. Then, the RAM of the external storage device 35
The above steps S and S1° are repeated in step 11 until the messages stored in 33 become full. When the RAM 13 is full of messages, if the external storage device 35 is replaced in step S12, the messages can be saved and the process returns to step S& again, but if the external storage device 35 is not replaced, step S
, the old message stored in the RAM 28 is erased and a new message is stored.

When the message information ends in step S13, the central processing unit 24 sends a message end signal to the central processing unit 32 of the external storage device 35 via the interface 29 and the connectors 30 and 34.

Conventionally, with the configuration shown in FIGS. 3 and 4, when storing data in memory, receiving a long message, or storing multiple messages, a large capacity memory is used in the device. By using an external storage device that can be connected in the form of an attachment, those who must install it can prevent received messages from being lost due to limited memory.

6 and 7 are an external perspective view and a block configuration diagram of a dedicated unit for externally outputting information stored in the external storage device 35 shown in FIGS. 3 and 4. FIG.

In the figure, reference numeral 42 indicates an interface 36° control circuit 37. Printer unit 38. It is a dedicated unit consisting of a buffer 1 amplifier 40 and a connector 41, and this dedicated unit 42 is connected to a personal computer 44 via a connector 43. Note that printing paper 39 is attached to the printer unit 38.

Next, a description will be given of the operation when the dedicated unit 42 having the above configuration is used to transfer information stored in the external storage device 35 to a hard copy or personal computer 44 for information processing.

First, the central processing unit 32 accesses the RAM 33, and the information stored in the RAM 33 is converted by the interface 36 into a signal desired by the dedicated unit 42, and then sent to the control circuit 37. therefore,
This control circuit 37 drives a printer unit 38 to hard copy information onto printing paper 39. Further, when the function of the dedicated unit 42 is set to information processing, the information sent to the control circuit 37 is sequentially transferred to the personal computer 44 via the buffer amplifier 40, and the information processing is performed by the personal computer 44. It will be done. At this time,
Since the radio selective calling receiver 20 is not connected to the dedicated unit 42, the influence of the radiation noise of the dedicated unit 42 on the received information can be eliminated.

For this reason, conventionally, when installing a dedicated unit, the sensitivity of the receiver decreases due to radiation noise caused by the system clock used in the data processing section such as the CPU in the dedicated unit, making it impossible to receive normally during the external output period. will be resolved. That is, for hard copying or data processing of received messages, by removing the external storage device 35 from the receiver 20 and inserting it into the dedicated unit 42, messages can be received without being affected by noise.

〔Effect of the invention〕

As explained above, the present invention has a first device equipped with a memory for storing message signals, and a second device equipped with a display section for displaying message signals. The display section and the display section for displaying the message signal are separated, which has the effect that the receiver can be made smaller. Moreover, not only is the receiving section of the receiver made smaller, but it is also possible to increase the screen size of the display section to improve visibility, allowing users to freely select the size of the display section. It also has the effect of being able to.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing a first embodiment of the present invention;
FIG. 2 is a block diagram showing a second embodiment of the present invention;
FIG. 3 is a block diagram showing a third embodiment of the present invention;
4 is an external perspective view embodying what is shown in FIG. 3, FIG. 5 is a flow chart showing the operation of the third embodiment shown in FIG. 3, and FIG. FIG. 4 is an external perspective view of a dedicated unit for externally outputting information stored in an external storage device, and FIG. 7 is a block diagram of the dedicated unit shown in FIG. 6. 1.21... Antenna, 2.22... Radio section, 3.
... Waveform shaping circuit, 4, 23 ... Decoder, 5, 27
...-ROM, 8.15...message processing section, 9.
13...Memory, 10°14.20...Receiver, 1
1.26...Display unit, 12.16...Display unit module, 24°32...Central processing unit, 25...Display drive unit, 28.33...RAM, 29...°. Interface, 30. 34... Connector, 35... External storage device, 42... Dedicated unit. Figure 5

Claims (4)

[Claims] (1) In a wireless selective calling receiver that receives a message signal sent following an individual selective calling number signal,
A radio selective calling receiver comprising: a first device having a memory for storing the decoded message signal; and a second device having a display unit for displaying the message signal. (2) The radio selective calling receiver according to claim 1, wherein the first device and the second device are electrically connected and mechanically integrated. . (3) Claim 1, characterized in that the memory in the first device has a structure that is electrically and mechanically removable.
The radio selective calling receiver described in Section 1. (4) The radio selective call receiver according to claim 3, wherein the memory in the first device has a structure that is electrically and mechanically detachable from the second device.