JPH0594441A - Document processor - Google Patents

Abstract

(57) [Abstract] [Purpose] The present invention uses a low-speed wireless communication path so that there is no problem in practical use. [Structure] Consists of a child device having a word processor (WP) processing function and a parent device having storage means for storing the created document file (DF). The parent device and the child device can wirelessly transmit data and have the same DF. In the document processing device capable of delivering the document, the first processing means 10 having a processing function as a WP in the child device.
6, operation means 103 and display means 104 for creating a document,
The history information (HS) is created during the process of changing a document for the same DF as the unupdated DF saved in the parent machine, and a means 106 for controlling the HS transmission when a DF save command is received is added. A large-capacity storage means for storing the DF in the machine, when the HS is received from the child machine, the corresponding DF of the DF changed in the child machine is read from the large-capacity storage means, changed according to HS, and changed in the child machine
Second control means having a function of changing the DF to the DF having the same content as the DF and a function of controlling the updated storage of the changed DF in the large capacity storage means are added.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable notebook word processor equipped with a wireless data transmission unit, and particularly for transmitting a document file to a master unit in a short time while using a low speed transmission line. The present invention relates to a document processing apparatus of a wireless data transmission system that is capable of performing the above.

[0002]

2. Description of the Related Art Recently, word processors have been miniaturized due to miniaturization of constituent parts or progress of mounting technology and LSI technology, and have become widely popular as notebook type word processors which are light in weight and easy to carry. .. This notebook word processor (below,
A word processor is simply called) for input and output of documents, because it is very convenient and small, it is an extremely superior device in terms of mobility, such as taking up no space anywhere on the desk.

However, although the notebook type word processor has become smaller, it has a thickness of several centimeters and a weight of several kilograms. This is because there is an indispensable component that the current device wants to omit for miniaturization, but cannot be omitted. For example, if some external storage is required to store the input document and this is a floppy disk, a mechanism (drive mechanism) for inputting / outputting to / from this floppy disk.
Must be implemented inside the word processor.

This floppy drive mechanism is heavy,
There is a problem in terms of implementation, such as taking up some space for miniaturization.
Further, in the case of a small device such as a word processor, a floppy used for storing a document file has a smaller storage capacity than a hard disk or an optical disc, and the number of documents that can be stored inside is limited. Therefore, the user saves the floppies separately for each purpose, such as using different floppies for each document type. Therefore, there is a drawback that the number of floppies that must be managed increases and that the floppies are not clean. ..

A printer is indispensable for printing the contents of a document file in a word processor, but in many cases, this printer cannot be integrated with a notebook type word processor in order to maintain the miniaturization.

[0006] In order to ensure portability, unlike a desktop word processor, it is usually used only by the word processor itself, and the printer is connected only when printing is necessary. There are many.

Therefore, when a user tries to print a document with a notebook type word processor, the word processor is placed next to the printer at the time of printing, both machines are connected with a cable, and then printing is performed. Took a lot of time.

Further, in order to ensure portability, the connection with the printer is limited to only when necessary. Therefore, the word processor is connected with the printer by a cable every time printing is required, so that the number of times the cable is attached and detached is accumulated. As a result, the connectors of both the word processor and the printer have the drawback of gradually causing poor contact.

Therefore, as one means for solving the various drawbacks described above, the word processor is divided into a notebook type slave unit 2 and a master unit 1 as shown in FIG. 10, and a large capacity memory is stored in the master unit 1. The device is built-in or externally attached, and the printer 3 is externally attached.
A configuration is conceivable in which data is exchanged by wireless communication using a transmission line between them as a wireless line.

By adopting such a configuration, it is possible to save the trouble of connecting the devices with the cable. In addition, the slave device 2 is configured not to include an external storage device such as a floppy disk drive for storing the document file, and the external storage device is mounted on the master device 1 and wirelessly connected to the slave device 2.
Since it can be configured to send and receive files with
The miniaturization of the child device 2 can be promoted.

Further, since the printer 3 is connected to the base unit 1, even if there are a plurality of handset units 2, they can be arranged and managed so that data from the handset units do not collide with each other in terms of time. I'll be in time. Further, not only the floppy disk but also a large-capacity disk drive such as a hard disk or an optical disk is attached to the base unit 1, so that more document files can be stored than before.

[0012] In general, the master unit is not placed on a desk to be worked, but placed in an unobtrusive place such as a corner of a room, and a plurality of slave units commonly use the master unit to make an office. The efficient operation of can be realized.

However, there may be problems with the system according to this example. That is, when a document file is transferred between the master unit and the slave unit, high-speed data transmission cannot be performed by wireless data transmission. According to the low power data transmission method (frequency 400MHz band), which is the most easily available radio law in Japan at present, the transmission rate is practically up to 4800bps, and if a higher transmission rate is desired, It is necessary to raise the frequency (GHz band).

However, when the frequency becomes high, a transmission error occurs even if the obstacle slightly blocks the radiation direction of the radio wave, which is not practical. Further, in order to reduce the transmission error, it is technically difficult.

Further, when the system shown in FIG. 10 is used, the case where a document is input on the terminal side (slave unit 2) and the document file is transmitted to the master unit 1, and conversely to the disk of the master unit 1 Although there are cases where the saved document file is transmitted to the terminal side, in the case of document input, an example of sending the document input on the terminal side to the master unit only once and saving it to the disk of the master unit 1 side is There are many cases in which a document is frequently saved to the disk on the master side while inputting a document. The reason for this is that the document file that has been input up to now may be lost due to an operation error on the terminal side, and the document being created is frequently stored and updated for empirical safety assurance.

[0016]

As described above, it is necessary to reduce the size and weight of the notebook type word processor, and the printer, which is an essential device for the word processor, is used externally. The characteristic of a word processor is that it can be easily brought with you anywhere, and in general, a printer is often used by connecting it with a cable when printing becomes necessary.

For this reason, there are problems such as troublesome cable connection with the printer in the case of printing, contact failure due to abrasion of the cable connector due to cable attachment / detachment, and the like. Storage and printing of document files is possible by separating the main unit, connecting a printer to the main unit, providing a large-capacity external storage device, and transmitting data wirelessly between the slave unit and the main unit. A configuration has been proposed that allows easy implementation. According to this, only a basic configuration such as a keyboard, a display, a main memory, a processor, a battery power source, and the like need to be mounted on the slave unit, and the reduction in size and weight can be further promoted.

However, due to the nature of the word processor, it is common to frequently update and store the document file in the external storage while the document is being created. However, if data is wirelessly transmitted between the terminal side and the master side, the transmission speed is high. However, there is a drawback in that it takes a long time for transmission because it is impossible. Especially when the document file is large, the transmission time becomes longer,
There was a problem in practice.

In order to shorten the transmission time, it is possible to solve the problem by using radio waves in a high frequency band. However, in the high frequency band, it is necessary to make the space between the antennas visible, which may obstruct the view. There are many problems when used in the office or at home, such as causing communication failure immediately.

Therefore, the object of the present invention is to
By using a low-speed wireless communication system that can be easily used, the transmission time is virtually eliminated in normal usage, and a bulky or bulky mass storage device can be installed on the master unit side. Another object of the present invention is to provide a word processor capable of promoting miniaturization and weight reduction of a child device.

[0021]

In order to achieve the above object, the present invention is configured as follows. That is, it is composed of a slave unit having a processing function as a word processor and a master unit having a storage means for storing the created document file. The master unit and the slave unit are connected by a wireless transmission line, and data is transmitted between them. In a document processing apparatus capable of transmitting document files that can be transmitted and are equivalent to each other, firstly, a first processing unit having a processing function as a word processor in the slave unit, and an input for creating a document. The operation means and the display means, when the document change processing of the same file as the unupdated document file saved in the parent machine is made, the history information of the change processing is created and the history information is transmitted when the file save command is received. A control means for controlling is added, and a large-capacity storage means for storing and storing a document file in the parent machine, and history information from the child machine side When receiving, a function of reading the corresponding file of the file changed on the slave side from the large-capacity storage means, performing change processing according to history information, and changing to a file having the same content as the changed file on the slave side, and this change And a second control means having a function of controlling the stored file to be updated and stored in the large-capacity storage means.

Secondly, when a file save command is received by the first control means, the size of the file to be saved is compared with the history information, and the one having the smaller capacity is used for the file save command. A function for controlling the transmission of the file is added to the second control means, and when the file saving command and the file or the history information is received from the slave unit, the file is received in the case of the file, and the history information is also received. When received, the corresponding file of the file changed on the terminal side is read from the large-capacity storage means and according to the history information,
A function of performing a changing process to change to a file having the same content as the changed file on the terminal side and a function of controlling to update and store the changed file in the large-capacity storage means are additionally configured.

[0023]

In the above configuration, when the document file is transferred from the slave side which is the terminal side to the master side, in the first configuration, the same file as the document file held by the master side is stored in the slave side. When the contents are changed by, the history information of the change process is created, and when the slave unit side issues a file save command, the first control means on the slave unit side controls to transmit the history information to the master unit side. To do. As a result, the history information is transmitted to the master unit side, and the master unit side sequentially changes the file before the change based on the change history contents obtained from the history information, and when it finishes, the master unit has a large capacity. Save to storage means and update the file.

As described above, when the document file changed on the terminal side is sent to and saved in the parent device side, the history information of the change is sent to the parent device side, and the parent device side follows the original history information according to the history information. Since the file is modified, the transmission amount is small. Therefore, according to the present invention, the transmission time can be effectively reduced in the normal usage mode by using the low-speed wireless communication method which can be easily used. It is possible to provide a document processing device that does not become

Further, in the case of the second configuration, the capacity of the changed file is compared with the capacity of the total change history contents (history information) required for the change, and if the capacity of the changed file is smaller, the conventional change is made. The contents of the file are sent from the terminal side to the master side as they are, and the master side saves the contents to the disk and saves the contents of the file. If the total change history content has a smaller capacity, the change history content is sent from the terminal side to the master side, and the master side sequentially changes the file before the change based on the change history content. When finished, the file is updated by saving it in the mass storage means on the master unit side.

As described above, when the document file changed on the terminal side is sent to the master side and stored, the file size is checked and whether the file is sent as it is or the change history contents are sent automatically. I decided to send the data with less capacity, so that the amount of data to be transmitted wirelessly can be reduced as much as possible, and the transmission time can be shortened and file storage and transfer can be done in a time with no practical problems. You will be able to.

Therefore, according to the present invention, it is possible to use a low-speed wireless communication system that can be easily used, and practically not to worry about the transmission time in the normal usage mode.
Therefore, it is possible to provide a document processing apparatus in which a large-capacity storage device having a large volume and weight can be provided on the base unit side, and the miniaturization and weight saving of the handset unit can be promoted.

[0028]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a system block diagram showing an embodiment of the present invention, FIG. 2 is a block diagram on the slave side, and FIG. 3 is a block diagram on the master side.

In FIG. 1, 10 is a master unit of the system according to the present invention, and 107 is an antenna of the master unit 10 and 3
Is a printer connected to the parent device 10 by a cable 3a. Reference numeral 20 is a child device, 104 is a flat panel type display such as liquid crystal or plasma, 103 is a keyboard, and 101 is an antenna.

Although not shown, the master device 10 has a built-in large-capacity storage device, and the slave device 20 does not include a floppy drive for external storage or a hard disk for the purpose of weight reduction and size reduction. The slave device 20 and the master device 10 are configured to exchange data and the like by wireless communication, and the document file created by the slave device 20 is wirelessly sent to the master device 10 and stored and stored in the mass storage device. .. Next, the configuration of the child device 20 will be described with reference to FIG.

Reference numeral 101 denotes an antenna, and reference numeral 102 denotes radio data transmission for performing an operation of receiving a radio wave through the antenna 101 and converting it into data, and an operation of receiving the data and converting it into a high frequency radio wave and radiating it from the antenna 101 into the air. It is a department. Reference numeral 103 is a keyboard for input operation used for inputting a document and the like.

Reference numeral 104 denotes a display for displaying contents in the process of inputting a document, which is constituted by a flat panel type display such as a liquid crystal display or a plasma display.

Reference numeral 105 denotes a memory, which is composed of a RAM (random access memory) and a ROM (read only memory). The RAM is used as a work memory for temporarily storing a document file or a work memory for temporarily storing data in the process. The ROM stores a processing program as a word processor on the terminal side, a kana-kanji conversion dictionary, or the like.

Reference numeral 106 denotes an arithmetic processing unit (C which controls the terminal side).
PU), which executes a program stored in the ROM to realize a function as a word processor, controls the wireless data transmission unit 102 to perform data transmission, and various control of the entire system. Take charge.

In this system, the cordless handset is constructed as a pure editing terminal and basically has no external memory such as a floppy disk drive mechanism or the like, thereby achieving a reduction in size and weight. Then, in the present system, in the slave unit, when a file is changed, a change history HS indicating the contents of the changed process is created and left in the memory 105 in addition to the changed file (text). When a file save command is input, the capacity of the changed file is compared with the capacity of the information in the change history HS, and the smaller capacity is transmitted to the master unit. Such processing is realized by the arithmetic processing unit 106 executing processing according to a processing program stored in the memory 105.

FIG. 3 is a block diagram of the master unit side. In the figure, 107 is an antenna, and 108 is a wireless data transmission unit. A printer 109 prints the content of the document file, and is controlled by the arithmetic processing unit 112 to perform a printing operation. Reference numeral 110 denotes a memory, and this memory 110 is composed of a RAM and a ROM as in the terminal (child device) side. Reference numeral 111 denotes a large-capacity disk for storing a document file, which is controlled via the arithmetic processing unit 112 to write a reception file and read a storage file. The arithmetic processing unit (CPU) 112 is the center of control on the base unit side,
By executing the processing program stored in the memory 110,
Control each component.

When the master unit receives a file save command from the slave unit, if the data sent from the slave unit is all the data of the file, it stores it in the memory 110.
When the change history HS is used, the file to be saved is changed according to the change history HS, and after the change processing is completed, the same file content as that of the child device side is obtained. It has a function of storing in the disk 111.

To change the content of the file, the target document file is read from the disk 111 to the memory 110, and the same operation as the operation content of the change history HS is sequentially performed on the file read to the memory 110 according to the change history HS. , And then stores the file on the disk 111 with the original file name. Such processing is realized by the arithmetic processing unit 112 executing according to a processing program stored in the memory 110.

Next, the operation of such a structure will be described. First, in the initial state, if there is no document file on the terminal side (slave unit side), the document file is read from the master unit or a new document file is created on the slave unit side. For the operation of
It is exactly the same as a conventional word processor.

That is, referring to FIG. 4, for file reading, a file name is input from the keyboard 103 on the terminal side. Then, the processing unit 106 on the slave side sends a read command including the file name to the wireless data transmission unit 102, and thereby the wireless data transmission unit 102.
Converts this command into a high frequency signal, and antenna 101
Radiates radio waves from the air.

This radiated radio wave is transmitted to the antenna 1 on the base unit side.
It is received at 07 and sent to the wireless data transmission unit 108.
Then, the wireless data transmission unit 108 demodulates this, converts it into data, and sends it to the arithmetic processing unit 112. Arithmetic processing unit 112
Decodes and executes this command, controls the disk 111, reads the corresponding file from the disk 111,
Drop into memory 110.

Next, the file read and stored in the memory 110 is read out and sent to the wireless data transmission unit 108 by the arithmetic processing unit 112 in accordance with the procedure of the transmission processing, and the wireless data transmission unit 108 reads the file given. The data is converted into a high frequency signal and radiated as a radio wave from the antenna 107 into the air.

The radiated radio wave is transmitted to the antenna 101 on the terminal side.
Are received, are demodulated by the wireless data transmission unit 102, converted into original data, and sent to the arithmetic processing unit 106. The arithmetic processing unit 106 stores this data in the RAM area of the memory 106 and controls the display 104 to display the contents of the file at the same time. As a result, a document file having the same content as the document file with a certain file name saved on the master side is read into the memory 105 on the slave side,
It becomes possible for the slave unit to change the document of the read file. Next, the operation of newly inputting a document on the terminal side to create a document file, sending this file to the parent machine, and saving it on the parent machine side will be described.

That is, referring to FIG. 5, since the arithmetic processing unit 106 on the slave side controls to display the contents of the page being operated in the document being created on the display 104 in real time, the terminal side Input a document while looking at the display 104 from the keyboard 103 of.
The input contents and the editing contents by the editing operation are stored in the memory 105.
Is updated and stored as a document file in the RAM area.

Such processing is the same as that of the conventional word processor, and does not change at all. Then, if the document input is completed or if it is desired to store this document file in the external storage device in the middle of creation, then a document save command is input from the keyboard 103 on the slave side. At this time, enter the file name.

Then, upon receipt of this command and the file name from the keyboard 103, the processing unit 106 on the slave side follows the save command and stores the save command code and file name for the master side and the save stored in the memory 105. Wireless data transmission unit 10 while reading a document file to be read
Send to 2. The wireless data transmission unit 102 converts the command code, the file name, and the data of the document file into a high frequency signal and radiates it as a radio wave into the air from the antenna 101.

The radio wave radiated from the slave unit is received by the antenna 107 of the master unit, and the wireless data is converted into the original command code, file name, and document file data by the transmission unit 108 and sent to the arithmetic processing unit 112. Be done. The arithmetic processing unit 112 stores the data to be input from the next in the memory 110 in response to the first received save command code. When the storage of the received document file data is completed, the arithmetic processing unit 112 again reads the stored document file from the memory 110, sends it out to the disk 111 together with the file name of the document file, and controls to store it.

Here, the document file by the reading described above with reference to FIG. 4 or by the new creation described with reference to FIG. 5 is the RAM of the memory 105 on the terminal side.
It is assumed that the newly created document file stored in the area is sent at least once to the parent device side by the document save command and saved in the parent device side. Then, a process of further changing this document file and storing it in the master unit in the middle of the change will be described with reference to FIG.

Therefore, the transmission processing in this system is temporarily
This is the operation in the case where the document file in the memory 105 on the terminal side is sent to the master side by the file save command and stored, or the file is read from the master side and the change process is added to this. .. When a file is newly created and is not saved in the master, the file created by the slave is saved by the save command by transmitting the entire file in the slave to the master. Therefore, it is controlled not to create the change history in the unsaved state. The arithmetic processing unit 106 performs such management.

When the file is once saved or read from the parent machine, the document file A before change is the RAM in the memory 105 on the terminal side (child machine side) at that stage.
It is stored in the area. Then, the contents of the document are changed with reference to the document file A. In general, the editor function of a word processor is used to operate the keyboard 103 while looking at the display 104 to make changes. Then, the arithmetic processing unit 106 on the side of the child device 20 uses the change history HS.
Is stored in the RAM area of the memory 105 in a predetermined format. An example of the change history HS is shown in FIG.

In the word processor, it is sufficient to change the document by the three modes of insert, delete and overwrite. Here, insert, delete, and overwrite
At the beginning of the mat, I is used to distinguish these three modes.
It is the D number. First, the contents of the insert mode format will be described.

In the illustrated example, there is character position information after the ID number "0" indicating the insertion mode. This shows how many characters the insertion position corresponds to from the beginning of the relevant document file. Next is information on the number of characters to be inserted, and then information on the contents to be inserted. The number of inserted characters is the number of characters inserted at that character position. The inserted content is the content to be inserted at that character position. The deletion mode is in the order of the character position to be deleted and the number of characters to be deleted from that position, following the ID number "1" indicating the deletion mode.

In the overwrite mode, the ID number "2" indicating the overwrite mode is followed by the character position to be overwritten, the number of characters to be overwritten from that position, and the content to be overwritten from that position. In the case of overwriting, the previous contents are deleted by the specified number of characters and replaced with new contents.

Therefore, in this system, by operating the keyboard 103 for the document file A on the slave unit 20,
If a character is inserted, the data of the inserted content is created in the above-mentioned insert mode format, and if the delete operation is performed, the data of the deleted content is created in the delete mode format.
If the overwrite operation is performed, the data of the overwrite content is created in the overwrite mode format, and is stored in the memory 105 as the data of the change history HS.

At the same time, the contents themselves of the document file A are also changed in the memory 105 by these changing processes for the document file A. Then, when such a change is completed, the original document file A becomes the updated new document file B.

Here, the keyboard 103 on the child device side is operated to give a file save command. Then, the arithmetic processing unit 106 determines the total capacity of the document file B and the change history HS.
Compare the full capacity of. Then, when the capacity of the document file B is small, the document file B is directly transmitted to the master device 10 side and stored in the disk 111 on the master device side similarly to the initial saving in FIG. The transfer method is by wireless transmission.

On the other hand, when the change history HS is smaller, the arithmetic processing unit 106 on the slave unit 20 side wirelessly transmits the information of the change history HS to the master unit 10. If the entire document is small, the change history HS may be larger than the change history HS. However, in general, the change history HS is often smaller. Then, as the document becomes longer, the difference with the size of the change history HS becomes larger,
The method of the present invention becomes advantageous.

Next, on the base unit 10 side, the terminal side (the handset 20 side)
When the change history HS is received from the processing unit 112 on the side of the master device 10, as shown in FIG. 6, the document file before the change is processed by the same processing as the processing on the side of the terminal from the received change history HS. The changed document file B is created from A using the change history HS. Then, when the change is completed, the arithmetic processing unit 112 controls and saves the changed file B to the disk 111 next, and ends the series of operations.

That is, as a result, the changed document file B is stored in the memory 110 and the disk 111 on the base unit 10 side.
It has been saved in. After that, if the file save command is given when the document file is similarly changed on the terminal side, the file size currently being created on the terminal side is compared with the file size of the change history HS. After that, the one with the smaller capacity will be transmitted to the base unit side and the file will be updated. Generally, the change history HS that records the process of changing the file is smaller than the total capacity of the created file. When the change history HS is small, by sending only the change history HS to the parent device, it is possible to reduce the amount of transmission data to the parent device side, and even if the transmission speed is slow,
The transmission time can be shortened accordingly.

Also, the master unit side sends the change history HS sent to it.
The file contents can be changed in the same way as on the terminal side by performing the same change processing as on the terminal from the terminal, and the changed document file is recorded on the disk 1
By storing the file in 11, the file having the same content as the changed file on the terminal side can be updated and stored.

The terminal side is often driven by a battery as a power source, and even if the power source is turned off, the RA of the memory 105 is
Since the M area is backed up by the battery, the contents are not erased. Therefore, the document file and the change history HS are protected during the input / output process. Also, after the master device has updated the document file based on the change history, by sending a print command from the slave device, the updated file can be printed on the printer 3 and the changed document You can get a hard copy of.

Here, consider a case where there is one master unit and a plurality of terminals. Referring to FIG. 9, the operation is essentially the same as the combination of one terminal (slave unit) and one master unit described above. However, since the document file and the change history HS are respectively sent from a plurality of terminals (child devices 20a to 20n) to the master device 10 side, the document file and the change history HS are distinguished for each terminal. Must be managed and processed. For this reason, it is necessary to add a station number designated for each terminal to the document file and the change history HS and manage the station number by this number.

The base unit 10 and terminals (20a to 20n)
In the case of simple asynchronous communication between terminals, if a document file and change history HS are sent simultaneously from one terminal to a plurality of terminals at the same time, collision may occur when receiving radio waves on the parent side. There is also. Therefore, the communication between the master unit and the terminal must be managed by a protocol so that the communication can be surely performed.

As described above, this system is composed of a slave unit having a processing function as a word processor and a master unit having a storage means for storing a created document file.
In the document processing device in which the master unit and the slave unit are connected by a wireless transmission path and data can be transmitted between them and equivalent document files can be passed, the slave unit has a processing function as a word processor. Having 1st
Processing means, input operation means and display means for creating a document, and history information of the change processing is created at the time of changing processing of a document for the same file as the unupdated document file saved in the parent device and file saving. When a command is received, the capacity of the file to be saved is compared with the history information, and control means for controlling the smaller capacity to be transmitted together with the file saving command is added,
A large-capacity storage means for storing and saving a document file in the parent device, a file saving command and a file from the child device side or a file if history information is received, and a terminal if history information is received. A function of reading the corresponding file of the file changed on the side from the large-capacity storage means, performing a changing process according to the history information to change the file to the file having the same content as the changed file on the terminal side, and the changed file This is configured by adding a second control means having a function of controlling to update and store to the large-capacity storage means, and when the file is changed on the handset side, history information of the change operation is created. Then, when transferring the file to the parent device side, the size of the changed file was compared with the size of the total change history contents (history information) required for the change. If the file capacity is smaller, the contents of the changed file are sent from the terminal side to the master side as they are, and the master side saves the contents to the disk to save the file contents or print command. If the file is given, the file is printed.If the total change history content is smaller, the change history content is sent from the terminal side to the master side, and based on the change history content on the master side. The file before the change is sequentially changed, and when it is finished, the file is saved in the large-capacity storage means on the master unit side to update the file, and the file is printed if the print command is given.

In short, the master unit and the slave unit are connected by a wireless transmission path, data transmission is possible between the two units, and the same document file is held, and the slave unit side changes this document file and then saves it in the master unit. When storing, the change history is accumulated, the capacity of the document file and that of the change history are compared, and the one with the smaller capacity is transmitted. When a message is received, the parent machine performs the same change processing as the child machine based on this change history and the original file that it holds before the change and based on this change history. The file is created and then saved.

In general, when the contents of a file are changed, the amount of change history information indicating the contents of the change process tends to be smaller than the size of the entire document, and the contents of the change process are shown. If there is change history information and the original file before update, it is possible to reproduce a document file with the same content as the content of the document file that has undergone the change processing on the child device side.
When the change history information is smaller than the document file capacity, this change history information is sent, the parent device changes the original file based on the change history information, and then the update file is stored in the document file. When the document file is received, the received document file is updated and stored, so that the transmission amount can be minimized. Therefore, even in the case of a wireless transmission line having a low transmission speed, the transmission time can be shortened and the practicality is improved. The present invention is not limited to the embodiments described above and shown in the drawings, and can be appropriately modified and implemented within the scope of the invention.

[0067]

As described above, according to the present invention, a master unit and a slave unit are connected by a low-speed wireless transmission line so that a document file can be exchanged between them and a document is created or changed. In the system where the processing is performed on the slave side, when transmitting the changed document file to the master side,
Since the minimum data transmission will be sufficient, the contents of the changed document file can be transmitted in a short time even at a low transmission speed, and there is no practical problem in transferring the document. In addition, since it is possible to provide a bulk storage device having a large volume and weight on the main unit side,
Since it is sufficient for the slave unit to include the minimum necessary components as a word processor, it is possible to provide a document processing device having features such as reduction in size and weight.

[Brief description of drawings]

FIG. 1 is an external view of a system showing an embodiment of the present invention.

FIG. 2 is a block diagram showing the configuration of a child device 20 of FIG.

FIG. 3 is a block diagram showing the configuration of a master device 10 of FIG.

FIG. 4 is a diagram for explaining the operation of the system of the present invention, and is a diagram for explaining the operation of reading a file from the parent device to the child device.

FIG. 5 is a diagram for explaining the operation of the system of the present invention, and is a diagram for explaining the operation of reading a file newly created by the child device into the parent device.

FIG. 6 is a diagram for explaining the operation of the system of the present invention, and is a diagram for explaining the operation up to the stage before transferring the update file obtained by the file change operation in the child device to the parent device.

FIG. 7 is a diagram for explaining the operation of the system of the present invention, and is a diagram for explaining the operation at the stage when the update file obtained by the file change operation in the child device is transferred to the parent device.

FIG. 8 is a diagram showing an example of a format of change history information used in the system of the present invention.

FIG. 9 is a system configuration diagram when the present invention is configured by a plurality of terminals with respect to a master unit.

FIG. 10 is an external view of a system for explaining prior art.

[Explanation of symbols]

3 ... Printer, 10 ... Parent machine, 20 ... Child machine, 102, 10
8 ... Wireless data transmission unit, 103 ... Keyboard, 104 ...
Display, 105, 110 ... Memory, 106, 11
2 ... Arithmetic processing unit, 101, 107 ... Antenna, 111 ...
Disk, 112 ... Arithmetic processing unit, HS ... Change history.

Claims (3)

[Claims] 1. A slave unit having a processing function as a word processor, and a master unit having a storage unit for storing a created document file. The master unit and the slave unit are connected by a wireless transmission path, and both of them are connected. In a document processing apparatus capable of transmitting data between documents and passing equivalent document files to each other, a first processing unit having a processing function as a word processor in the slave unit, and an input operation for creating a document Means and display means, and control to generate history information of the change processing at the time of document change processing for the same file as the unupdated document file saved in the parent machine, and to transmit the history information when a file save command is received. And a control unit for controlling the storage unit, and the master unit stores large-capacity storage unit for storing and storing a document file, and history information from the slave unit side. Then, a function of reading the corresponding file of the file changed on the slave side from the large-capacity storage means, performing a change process according to the history information, and changing to a file having the same content as the changed file on the slave side, and this change And a second control unit having a function of controlling the stored file to be updated and stored in the large-capacity storage unit. 2. A slave unit having a processing function as a word processor, and a master unit having a storage means for storing a created document file. The master unit and the slave unit are connected by a wireless transmission path. In a document processing apparatus capable of transmitting data between documents and passing equivalent document files to each other, a first processing unit having a processing function as a word processor in the slave unit, and an input operation for creating a document Means and display means, and at the time of a document change process for the same file as the unupdated document file saved in the parent device, create history information of the change process and, when receiving a file save command, the size of the file to be saved and A control means for performing a capacity comparison with the history information and controlling the one having a smaller capacity to be transmitted together with a file saving command; In addition, a mass storage means for storing and storing a document file in the parent device, and when the file saving command and file or history information is received from the child device side, if the file is the file, the history information When receiving, a function of reading the corresponding file of the file changed on the slave side from the large-capacity storage means, performing change processing according to history information, and changing to a file having the same content as the changed file on the slave side, and this change And a second control unit having a function of controlling the stored file to be updated and stored in the large-capacity storage unit. 3. A printer is provided in the master unit, and when a print command is received by the second control means, printing of a designated file of the received file or the file stored in the mass storage means is performed by the printer. 3. The document processing apparatus according to claim 1, wherein the document processing apparatus has a function of controlling so as to execute.