JP3058026B2 - Screen data display system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screen data display system comprising a host computer storing a plurality of screen data, and a terminal device for reading and storing a part of the screen data and displaying the screen data. About.

[0002]

2. Description of the Related Art A screen data display system of this type is disclosed in Japanese Patent Application Laid-Open No. 1-228016.

The screen data display system stores, in a RAM controlled by a terminal, a data screen signal initially fetched after updating of a data screen signal stored in an external file of a host computer, to access the terminal. This allows the response time to be shortened and the overhead to be reduced.

[0004]

However, in the above system, only the first updated data screen can be read from the RAM on the terminal side, and after the data screen is transmitted from the host computer to the terminal, When the data screen on the host computer side is updated, there is a disadvantage that the data screen displayed on the terminal differs from the data screen stored in the external file on the host computer side.

If the size of the data screen to be read into the RAM of the terminal is larger than the free space in the RAM, other data screens already stored are erased and the free space is deleted regardless of the frequency of use. Is secured.

Accordingly, even a frequently used data screen may be deleted every time the operation is performed. Therefore, the data screen must be repeatedly read from the host computer in order to display the data screen on the terminal device. There is a disadvantage that the display speed is reduced except for the later first data screen.

According to the present invention, the processing is speeded up by appropriately sharing the processing between the host computer and each terminal device, and the same latest screen data as in the host computer is always promptly processed in each terminal device. Even if it can be displayed, and the free space of the terminal side storage unit is not enough,
It is an object of the present invention to provide a screen data display system capable of effectively utilizing a terminal-side storage unit by retaining the latest screen data that is frequently used and reducing the load on a communication line connecting a host computer and a terminal device.

[0008]

Means for Solving the Problems In order to achieve the above object, according to the present invention, a host computer and a terminal device are configured as follows. The host computer stores a plurality of screen data, a host-side storage unit storing the identification information and the history number thereof, and a history number transmitted together with the identification information of the screen data related to the request by a collation request from the terminal device . And the history number of the screen data of the corresponding identification information stored in the host-side storage unit,
If the two history numbers do not match, the latest screen data stored in the host-side storage unit is sent to the terminal device together with the history numbers of these , and if they match, there is history matching means for sending the fact. I have.

[0009] Each terminal device receives a screen data display request.
When the display-requested screen data is stored in the terminal-side storage unit, the identification information and the history number of the screen data are transmitted to the host computer to perform the above-mentioned verification, and When the screen data is not stored in the terminal-side storage unit, a read request unit that sends only the identification information of the screen data to the host computer and requests reading of the latest screen data stored in the host-side storage unit. Writing means for newly writing the latest screen data and its history number sent from the host computer side to the terminal side storage unit; and the latest screen data sent from the host computer or stored in the terminal side storage unit. Display means for displaying the latest screen data, and counting the number of times the screen data stored in the terminal side storage unit has been read out. Counting means for determining whether or not the storage area of the terminal-side storage section has a free area for writing the latest screen data read from the host-side storage section; By referring to the count value of the number of times of reading by the means, the screen data with a low number of times of reading written in the terminal side storage unit is erased, and the latest screen data read out from the host side storage unit is replaced with the free space of the terminal side storage unit. And the latest screen data writing means for writing the latest screen data.

[0010]

The operation of the screen data display system of the present invention is as follows. When the screen data to be actually displayed on the terminal device side is stored in the terminal side storage unit, only the identification information and the history information of the screen data are transmitted to the host computer.

The host computer compares the history information sent from the terminal device with the history information of the screen data stored in the host storage unit. If the two pieces of history information do not match, the latest screen data stored in the host-side storage unit is sent to the terminal device together with the history information, and if they match, the fact is sent to the terminal device.

The terminal device displays the latest screen data sent from the host computer or the latest screen data stored in the terminal storage unit on the display means. Further, when the screen data to be displayed is not stored in the terminal side storage unit, only the identification information is transmitted to the host computer, and the corresponding latest screen data is read out and displayed on the display means.

Also, the number of times the screen data stored in the terminal side storage unit is read out by the terminal device is counted, and the latest screen data read out from the host side storage unit is stored in the storage area of the terminal side storage unit. When there is no free area necessary for storing the screen data, the screen data having the lowest read number is sequentially erased by referring to the count value of the read number of the screen data to secure a new free area, and the latest screen is read. Write data to the free area.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing a schematic configuration of a screen data display system as one embodiment of the present invention.

This system comprises a host computer A,
A plurality of terminal devices B1 connected to this via a communication line
To Bm.

The host computer A has a screen data management unit 1 and a host storage unit 2 composed of a magnetic disk storing all screen data managed by the screen data as a screen file. FIG. 2 shows the file structure.

For example, n pieces of screen data SD1 to SD
If there are n, they are divided into n screen files C1 to Cn together with their identification information and history information,
Further, they are stored by being divided into first to third fields.

The first field of each of the screen files C1 to Cn stores a screen number SN as identification information for identifying each of these screen files. By designating this screen number SN, the screen data SD1 to SD1 are stored. SDn can be selected.

In the second field, each screen data SD
A history number CN as history information indicating versions 1 to SDn is stored, and by referring to this, it can be determined whether or not the screen data has been updated.

The third field stores screen data SD1 to SDn to be displayed on the display unit 5 as display means provided in each terminal device. The screen data SD1 to SDn have display contents that give an instruction on an input operation on the terminal device, for example.

The host-side screen data management unit 1 controls all the screen files C1 to Cn stored in the host-side storage unit 2 and receives a collation request from any of the terminal devices B1 to Bm to be described later. The history number CN of one or more screen data stored in the terminal-side storage unit 4 and the history number CN of the latest screen data stored in the host-side storage unit 2 are compared. If the history information does not match, that is, if the screen data on the terminal device side is not the latest one, the latest screen data stored in the host-side storage unit 2 is sent to the terminal device together with the history information, and If so, it has a function as history collation means for transmitting the fact.

The terminal devices B1 to Bm include a terminal-side screen data management unit 3, a terminal-side storage unit 4 composed of a magnetic disk for storing one or more screen data read from the host computer A, and a display unit. And a display unit 5.

The terminal-side storage unit 4 stores the host computer A
Screen data D obtained by adding the screen read count RC to the screen data, screen number SN and history number CN read from
3, D7, D13, etc. are stored (FIG. 3). In addition,
The plurality of screen files stored in the terminal storage unit 4 have different configurations for each terminal device.

The number of screen readings RC is equal to the screen data SD
3 indicates the read frequency of each terminal device such as SD7, which is incremented each time the terminal device B1 to Bm reads data.

The terminal-side screen data management section 3 controls the screen data stored in the terminal-side storage section 4 and has the following functions. (1) When the screen data to be actually displayed is stored in the terminal side storage unit 4, the screen number SN of the screen data
And a function of sending the history number CN to the host computer A and requesting collation (collation request means).

(2) When the screen data to be displayed is not stored in the terminal-side storage section 4, the screen number SN is sent to the host computer A, and the screen number SN stored in the host-side storage section 2 is transmitted. Function to request reading of the latest screen data (read request means). (3) A function (writing means) for writing the read latest screen data into the terminal side storage unit 4.

(4) A function (counting means) for counting the number of times of reading the screen data stored in the terminal-side storage unit 4. (5) A function of determining whether or not the storage area of the terminal-side storage unit 4 has a free area in which the latest screen data read from the host-side storage unit 2 is to be written (a free area determination unit).

(6) If there is no free space in the storage area of the terminal-side storage section 4 where the latest screen data to be read from the host-side storage section 2 is to be written, reference is made to the count value of each screen data read count and the terminal A function of erasing screen data with a low number of reads written in the side storage unit 4 and writing the latest screen data to be read into its free area (latest screen data writing means).

The display unit 5 as a display means displays the latest screen data SD3 and SD7 read from the host storage unit 2 or the latest screen data stored in the terminal storage unit 4. It has the function to do.

Next, the operation of the terminal device will be described with reference to FIG.
This will be described with reference to FIG. Here, the terminal device B1 and the host computer A will be mainly described, but the same applies to other terminal devices.

Step 1 (abbreviated as S1 in the figure; the same applies hereinafter): When there is an instruction to display specific screen data by operating a keyboard or the like (not shown), the process proceeds to step 2. Step 2: All screen files stored in the terminal side storage unit 4 are read, and the process proceeds to step 3.

Step 3: Check whether the specified screen data exists in all the read screen files,
If the designated screen data is stored in the terminal-side storage unit 4, the process proceeds to step 4, and if there is no corresponding screen data, the process proceeds to step 5.

Step 4: The screen number SN and the history number CN of the specified screen data are transmitted to the host computer A, and a request is made to check whether the screen data is the latest one.

Step 5: Request the host computer A to transmit the specified screen data.

Next, the operation of the host computer A requested to transmit screen data from the terminal device B1 will be described with reference to FIG. First, it waits for a collation request signal from the terminal device B1.
Proceed to.

Step 1 (abbreviated as S1 in the figure; the same applies hereinafter): The history number CN of the screen data stored in the host storage unit 2 is compared with the history number CN transmitted from the terminal device B1. , Proceed to step 2.

Step 2: As a result of the check, if the history number CN transmitted from the terminal device B1 matches the history number CN stored in the host-side storage unit 2, the process proceeds to Step 3, and if not, the process proceeds to Step 3. Proceed to 4.

Step 3: Transmit to the terminal device B1 that the history numbers CN match, that is, the latest screen data stored in the terminal device B1.

Step 4: Since the screen data stored in the terminal-side storage section 4 of the terminal device B1 is not the latest one, the latest screen data is read out from the host-side storage section 2 and the process proceeds to step 5.

Step 5: The history number CN is transmitted to the terminal device B1 together with the latest screen data.

Next, the operation of the terminal device B1 that has received the latest screen data from the host computer A or received a signal indicating that the history numbers CN match will be described with reference to FIG.

<When a signal indicating that the history numbers CN match is received> When a match signal of the history number CN is received from the host computer A, the process proceeds to step 1.

Step 1: The screen data is read from the terminal-side storage unit 4, and the number of screen readings RC is counted up. Step 2: The read screen data is displayed on the display unit 5.

<When the latest screen data is received from the host computer A> When the latest screen data is received from the host computer A, the process proceeds to step 1 '.

Step 1 ': It is determined whether or not there is an empty area in the storage area of the terminal-side storage section 4. If not, step 2'
If yes, go to step 3.

Step 2 ': Since there is no free area in the terminal side storage unit 4 for writing the screen data read from the host computer A, the terminal side storage unit 4 is referred to by referring to the count value of the screen reading frequency RC. Of the screen data stored in the memory is deleted as necessary, that is, the screen data which is frequently used is left, and the process proceeds to step 3.

Step 3: The latest screen data received from the host computer A is written in the free area, and the process proceeds to step 2.

Step 2: The latest screen data is displayed on the display unit 5.

It should be noted that the present invention is not limited to the above-described embodiment, and that various modifications can be made within the scope of the invention.

[0050]

According to the screen data display system of the present invention, the following effects can be obtained. When the screen data to be actually displayed is stored in the terminal device, only the identification information of the screen data and the history information are transmitted to the host computer side, and it is checked whether the history information matches. Sends the latest screen data stored in the host computer together with the history information to the terminal, so that the terminal can also display the same latest screen data as the host computer.

When the pieces of history information match, the screen data stored in the terminal device is the latest one. Therefore, the host computer does not send the screen data to the terminal device. Can be notified to the terminal device side, so that the latest screen data stored in the terminal device can be promptly displayed.

When the screen data to be displayed is not stored in the terminal device, only the identification information of the screen data to be displayed is sent from the terminal device to the host computer, and the latest data stored in the host computer is stored. Is transmitted to the terminal device together with the history information thereof, so that the terminal device can quickly display the same latest screen data as the host computer.

It is only necessary to judge whether or not the screen data is the latest one by judging whether or not the history information sent from the terminal device matches the history information stored in the host computer. Can be done quickly.

Since the most frequently used screen data is left for each terminal device, the number of times of reading screen data from the host computer can be reduced, and the display thereof can be performed more quickly.

Since the infrequently used screen data is erased and a free area is newly secured, and the latest screen data is written in the free area, the storage area of the terminal side storage unit is effectively used. Can be.

Since only the latest screen data to be displayed on a specific terminal device is transmitted from the host computer to the terminal device, the load on the communication line can be reduced.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a schematic configuration of a screen data display system of the present invention.

FIG. 2 is a structural diagram of a screen file stored in a host-side storage unit.

FIG. 3 is a structural diagram of a screen file stored in a terminal-side storage unit.

FIG. 4 is a flowchart showing an operation of the terminal device.

FIG. 5 is a flowchart showing an operation of the host computer.

FIG. 6 is a flowchart showing an operation of the terminal device.

[Explanation of symbols]

1 Host-side screen data management unit (history collation unit) 2 Host-side storage unit 3 Terminal-side screen data management unit (collation request unit, read request unit, writing unit, free space judgment unit, latest screen data writing unit, counting unit) 4 Terminal-side storage unit 5 Display unit (display means) A Host computer B1 to Bm Terminal device C1 to Cn Screen file D3, D7, D13 Screen file CN History number as history information RC Screen readout number SN Screen number as identification information SD1 to SDn screen data

Continuation of the front page (56) References JP-A-62-285126 (JP, A) JP-A-62-283789 (JP, A) JP-A-2-224114 (JP, A) JP-A-3-240825 (JP) , A) JP-A-2-61750 (JP, A)

Claims (1)

(57) [Claims] 1. A screen data display system comprising: a host computer storing a plurality of screen data; and a plurality of terminal devices capable of selecting and reading out and displaying a part of the screen data. together with the screen data, and the host-side storage unit which stores these identification information and the history number, the collation request from the terminal device, and the history number of the screen data transmitted together with the identification information of the screen data according to the request, The history number of the screen data of the corresponding identification information stored in the host side storage unit is compared with the history number, and if the history numbers do not match, the latest screen data stored in the host side storage unit is compared with the history number.
History matching means for sending to the terminal device together with the number , and sending a match if it matches, each terminal device has a screen
When there is a data display request and the screen data requested to be displayed is stored in the terminal-side storage unit, the identification information and the history number of the screen data are sent to the host computer to perform the above-described verification. Request means, and when the screen data is not stored in the terminal side storage unit,
Reading request means for sending only the identification information of the screen data to the host computer to request reading of the latest screen data stored in the host-side storage unit; and the latest screen data transmitted from the host computer. Writing means for newly writing the history number to the terminal side storage unit, display means for displaying the latest screen data sent from the host computer or the latest screen data stored in the terminal side storage unit, Counting means for counting the number of times of reading screen data stored in the terminal-side storage unit; and determining whether or not there is a free area in the storage area of the terminal-side storage unit for writing the latest screen data read from the host-side storage unit. Refer to the count value of the number of times of reading by the above-mentioned counting means when there is no free area. A latest screen data writing means for erasing the screen data having a low read count written in the terminal side storage unit and writing the latest screen data read out from the host side storage unit to an empty area of the terminal side storage unit. A screen data display system characterized by: