JP2008293361A - Screen display system, control method therefor, program, and storage medium - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To control a moving range of a cursor for preventing erroneous operation on a host terminal device. <P>SOLUTION: The screen display system is provided with a host terminal device having a shared area, which is operable from a remote terminal device connected via a communication line, on a screen, and the remote terminal device having a coordinate designation area for operating a pointing cursor displayed in the shared area. The screen display system is provided with an enlarging means enlarging a part of the shared area to display the whole of the shared area, and a host terminal cursor control means controlling the pointing cursor so as not to be out of the enlarged part of the shared area when the part is enlarged to display the whole of the shared area by the enlarging means. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a screen display system and the like.

  With the recent development of networks, electronic conference systems using computer systems have become widespread. In particular, in an electronic conference system using a large screen display device, the large screen display device is used as a shared display device for conference participants. Moreover, it can be used as an electronic drawing device such as an electronic whiteboard in addition to the use as a simple display device.

  In such an electronic conference system, a large screen display device is connected to one PC (Personal Computer), and conference participants can share and edit information displayed on the screen. As an input terminal for the shared screen, a wired or wireless mouse, keyboard, tablet, digitizer capable of inputting coordinates directly on the screen, or the like is used. On the other hand, information terminal devices such as notebook PCs and PDAs (Personal Digital Assistants) have also become widespread, and electronic conferencing systems combining both are known.

  Many of these information terminal devices include a wireless or wired interface, a liquid crystal display screen, and an input device such as a tablet or a keyboard using a pen as a data input method. Therefore, such an information terminal device can be used as an input terminal of the above-described electronic conference system. That is, the movement coordinates of the mouse cursor and the mouse click information can be sent from the information terminal device to the terminal device (host terminal device) as the host using the input device of the connected information terminal device. Then, on the host terminal device side, a mouse event is generated based on the mouse information sent from the information terminal device. In this way, the host terminal device can be operated from the information terminal device (remote terminal device), which is effective in a meeting or presentation.

  Here, a wired or wireless operation by a plurality of remote terminal devices and a simultaneous or alternating operation from a local input device connected to the host terminal device are performed on a host terminal device having one shared screen. Can do. However, since there is only one cursor resource of the host terminal device, there is a problem that operation conflicts and operator confusion occur. As a means for solving this problem, a method of giving the right (control right) to operate the cursor of the host terminal device exclusively to each remote terminal device can be considered.

  For example, as a method of switching an input device to which an operation right is given, there is a method of explicitly acquiring, assigning, and canceling an operation right based on an instruction such as pressing a button or selecting a menu from a host terminal device or a remote terminal device. There is also a method of automatically assigning control rights based on certain conditions (see, for example, Patent Document 1). The technique disclosed in Patent Document 1 automatically controls the operation right depending on whether or not the input from the input device has passed for a predetermined time.

  As a method for using the remote terminal device as a cursor operation terminal of the host terminal device, there is a method of providing a coordinate designation area for designating the position of the pointing cursor of the host terminal device on the remote terminal device. The coordinate designation area at this time includes a method of displaying the entire shared screen of the host terminal device and a method of cutting out and displaying a part thereof. There is also a method in which the remote terminal device does not have a display device, and a part of the tablet surface is associated with the entire shared screen of the host or a part of coordinates. In a meeting or presentation, it is possible to enlarge a part of the display screen for the purpose of improving the effect. As a means for realizing this, there is a case where the zoom function provided in the application of the host terminal device is used for enlargement and the display itself has a zoom function.

JP 2002-91898 A

  In the conventional technology as described above, when the coordinate designation area on the remote terminal device corresponds to the entire shared screen of the host, the user of the remote terminal device operates the remote terminal device while viewing the shared screen of the host. There are many. Therefore, when a part of the shared area of the host terminal device is in the zoom state, the cursor of the host terminal device may go out of the shared screen due to the system cursor operation from the remote terminal device, and the cursor may be lost. Further, the user of the remote terminal device may operate the remote terminal device while looking at the shared screen of the host terminal device, and may perform a click or tap without noticing that the cursor has come out of the coordinate designation area. Therefore, there is a problem that a click or tap operation outside the shared screen that is not displayed on the host terminal device causes an unexpected malfunction of the user.

  The present invention has been made in view of the above-described problems. When a part of the shared area of the host terminal device is enlarged and displayed on the entire shared area, the host is controlled by controlling the movement range of the cursor. The purpose is to prevent erroneous operation on the terminal device.

  The present invention provides on a screen a host terminal device having a shared area that can be operated from a remote terminal device connected via a communication line, and a coordinate designation area for operating a pointing cursor displayed in the shared area. A remote terminal device, and a screen display system comprising: a magnifying means for enlarging and displaying a part of the shared area over the entire shared area; and Host terminal cursor control means for controlling the pointing cursor so that it does not come out of a part of the enlarged shared area when the enlarged display is performed.

  According to the present invention, when a part of the shared area of the host terminal device is enlarged and displayed in the entire shared area, it is possible to prevent an erroneous operation on the host terminal device by controlling the movement range of the cursor.

(First embodiment)
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a block diagram showing the overall configuration of the screen display system according to the present embodiment. Reference numeral 20 denotes a host terminal device. The host terminal device 20 is connected to the remote terminal device 9 via a communication line, and can be operated from the remote terminal device 9 on the screen, and a shared area that can be directly viewed by the user of the remote terminal device 9 is provided. Yes. Reference numeral 1 denotes display means such as a display, which displays a shared area that can be operated from the remote terminal device 9. Reference numeral 2 denotes control means for performing various controls. Reference numeral 3 denotes storage means for storing exclusive information, zoom information, and the like, which are operating rights of the host terminal device 20 having a shared screen, and includes a nonvolatile memory such as a flash memory and a RAM, and an external storage device such as an HDD.

  Reference numeral 4 denotes operation right management means for controlling the operation right. Reference numeral 5 denotes an input means such as a mouse or a tablet for inputting coordinate information to the host terminal device 20. The input means 5 is not particularly specified as a digitizer, a touch panel or the like as long as it can input coordinates. 6 is a cursor for controlling the pointing cursor of the host terminal device 20 so as not to go out of the enlarged display area of the host terminal screen when a part of the shared area of the host terminal device 20 is enlarged and displayed in the entire shared area. Control means (host terminal cursor control means). Reference numeral 7 denotes enlargement means for enlarging and displaying a part of the shared area of the host terminal device 20 over the entire shared area. Reference numeral 8 denotes a communication unit, which is a network interface unit for controlling communication between the host terminal device 20 and another remote terminal device 9.

  Reference numeral 9 denotes a remote terminal device including a coordinate input device having a coordinate input unit for communicating with the communication unit 8 of the host terminal device 20 and operating a shared area of the host terminal device 20, and a PDA. Here, PDA is an abbreviation for Personal Digital Assistants. Reference numeral 10 denotes a network such as a LAN for performing wired or wireless communication between the host terminal device 20 and the remote terminal device 9. Reference numeral 11 denotes display means, which is a display of the remote terminal device 9 for designating coordinates for input to the shared area of the host terminal device 20. Reference numeral 12 denotes a control means for performing various controls of the remote terminal device 9. Reference numeral 13 denotes a storage means, which is a non-volatile memory such as a flash memory or a RAM, or an external storage device such as an HDD. Reference numeral 14 denotes cursor control means (remote terminal cursor control means), which performs cursor control such as placing or not placing a cursor from the coordinate input area of the remote terminal device 9 for specifying coordinates to the host terminal device 20. A communication unit 15 is a network interface unit that performs control for communicating with the host terminal apparatus 20. Reference numeral 16 denotes an input means for inputting coordinates to the remote terminal device 9, such as a pen, a mouse, and a tablet.

FIG. 3 is a block diagram showing the overall configuration of the screen display system according to the present embodiment.
In FIG. 3, the host terminal device 20 is connected to a mouse and a shared display for displaying a shared area as a coordinate input device, and input coordinates can be directly designated from the shared display with a digitizer. A notebook PC and a tablet are connected to the host terminal device 20 as a coordinate input device via a LAN.

FIG. 7 is a diagram showing a screen display that is a display unit of the host terminal apparatus according to the present embodiment.
In FIG. 7, reference numeral 701 denotes a shared display of the host terminal device 20. Reference numeral 702 denotes a shared area, which is an area where the pointing cursor (cursor) of the host terminal device 20 can be moved from the remote terminal device 9 connected to the host terminal device 20. The shared area 702 may be the same size as the displayable area of the display 701 of the host terminal apparatus 20 or may be a partial area of the display 701 of the host terminal apparatus 20.

  Reference numeral 703 denotes a cursor of the host terminal device 20. In a normal PC, there is one cursor and it can move to any range in the display 701. An area 704 is a rectangular designation example when an enlarged display area is designated on the host terminal device 20. In the host terminal device 20 or the remote terminal device 9, an area is designated by dragging a cursor or an area from an input device such as a remote controller. Specify.

FIG. 8 is a diagram illustrating an example of a screen display of a remote terminal device connected to the host terminal device according to the present embodiment.
In FIG. 8, reference numeral 801 denotes a display which is a display unit of the remote terminal device 9 connected to the host terminal device 20. Reference numeral 802 denotes an area for designating coordinates for operating the cursor from the remote terminal device 9 to the shared area 702 of the host terminal device 20. Note that the area 802 may display a screen image of the area 702. Reference numeral 803 denotes a cursor of the remote terminal device 9, and the movement of the cursor 703 and the cursor 803 is usually linked within the common area 702. In the area 802, the coordinates on the shared area 702 can be absolutely specified, and the upper left coordinates of the area 702 and the upper left coordinates of the area 802 correspond to the lower right coordinates of the area 702 and the lower right coordinates of the area 802. Yes. Since coordinates can be specified absolutely, it is desirable that the aspect ratio of the region 702 and the region 802 be the same in order to realize a natural feeling of operation.

FIG. 9 is a diagram illustrating a screen example of the host terminal device after the enlargement instruction.
In FIG. 9, an area 901 is the area 704 in FIG. 7 before the enlargement instruction is enlarged and displayed on the entire shared screen 702.

FIG. 10 is a diagram illustrating a screen example of the remote terminal device when the host terminal device is enlarged.
In FIG. 10, an area 1001 shows an area corresponding to the enlarged display area in the shared display area of the host terminal device 20 in the coordinate designation area of the remote terminal device 9. If the host terminal apparatus 20 is enlarged and displayed from FIG. 7 to FIG. 9, the area 901 corresponds to the area 1001.

FIG. 11 is a diagram illustrating a screen example of the remote terminal device when the host terminal device is enlarged.
In FIG. 11, an area 1101 corresponds to the enlarged display area of the host terminal device 20.

FIG. 4 is a flowchart showing a cursor control processing procedure of the host terminal device 20 when an enlarged display instruction is given according to the present embodiment.
First, in step S401, it is determined whether or not there is a screen enlargement instruction to the host terminal device 20, and if there is, the process proceeds to step S402.
Next, in step S402, the cursor position of the host terminal device 20 is acquired, and it is determined whether or not the cursor position is outside the enlargement area specified in step S401.
Next, if it is determined in step S402 that it is outside the enlargement area, the cursor is moved into the enlargement designation area in step S403. The cursor movement destination here is not particularly specified if it is within the enlargement designation area. In FIG. 7, since the cursor 703 is outside the enlargement designation area 704, the cursor 703 is moved to the enlargement designation area 902 in FIG. 9 in step S403. If it is determined in step S402 that the cursor is within the enlargement designated area, the process proceeds to step S404.

In step S404, various operations are detected from the host terminal device 20 or the remote terminal device 9 during zooming, and processing is performed. The operation of the host terminal device 20 and the remote terminal device 9 during zooming when the cursor is moved will be described later with reference to flowcharts of FIGS.
If it is determined in step S405 that the enlarged display has ended, the process returns to step S401. Otherwise, the process returns to step S404.

FIG. 5 is a flowchart showing a processing procedure of cursor control of the host terminal device during enlarged display of the host terminal device.
First, in step S501, it is determined whether there is an instruction to move the cursor of the host terminal device 20 from the input means 5 such as a mouse or digitizer or the remote terminal device 9. If there is an instruction, the process proceeds to step S502.
Next, in step S501, it is determined whether or not the host terminal device 20 is performing an enlarged display. When the enlarged display is being performed, the process proceeds to step S503.
Next, if it is determined in step S503 that the cursor movement instruction position is a movement outside the enlargement area, the movement of the host terminal apparatus 20 outside the enlargement designation area is invalidated in step S504. Although it is invalidated here, it may be forcibly moved to an arbitrary predetermined position.

If it is determined in step S503 that the cursor coordinate instruction position is a movement outside the enlarged display area, the enlarged area of the host terminal is moved so that the cursor coordinate instruction position is included in the enlarged area. Also good. However, in this case, if the end of the enlarged area has moved to the end of the original shared area, the process proceeds to step S504, and processing for moving the host terminal cursor is performed.
If it is determined in step S503 that the cursor coordinate indication position is within the enlargement designation area, or if it is determined in step S502 that enlargement display is not being performed, the process advances to step S505.
Next, in step S505, normal cursor movement is displayed, and the process returns to step S501.

FIG. 6 is a flowchart showing the cursor control processing procedure of the remote terminal device during the enlarged display of the host terminal device.
First, in the case where a cursor operation of the host terminal device 20 is performed using the coordinate designation area on the remote terminal device 9 from the input means 16 of the remote terminal device 9, whether or not a cursor movement instruction is issued from the remote terminal device 9 in step S601. Determine whether. If there is, the process proceeds to step S602.

In step S602, it is determined whether or not the shared area of the host terminal device 20 is being enlarged. If it is determined in step S602 that the enlarged display is being performed, the process proceeds to step S603.
In step S603, it is determined whether the cursor movement instruction position is an instruction to move outside the area on the remote terminal device 9 corresponding to the enlarged area of the host terminal device 20. Although the determination here is performed by the remote terminal device 9, the cursor coordinates may be transmitted to the host terminal device 20 to determine whether or not the host terminal device 20 is in the enlarged region.

When the determination process in step S603 is performed in the remote terminal device 9, the cursor control means 14 in FIG. When the determination is made in the host terminal device 20, the coordinate information is transmitted from the remote terminal device 9 to the host terminal device 20 from the communication means 15 in FIG. 1, and the coordinate information received by the host terminal device 20 is converted into the cursor control means. 6 makes the determination.
If it is determined in step S603 that the movement is outside the enlarged region, the process proceeds to step S604.

In step S604, the movement of the cursor of the remote terminal device 9 outside the enlargement designation area is invalidated. Although it is invalidated here, it may be a forced movement to an arbitrary predetermined position. Further, when it is determined in step S603 that the cursor coordinate instruction position is outside the enlarged display area, the enlarged area of the host terminal device 20 may be moved so that the cursor coordinate instruction position is included in the enlarged area. However, in this case, if the end of the enlarged area has moved to the end of the original shared area, the process proceeds to step S604, and processing for moving control of the remote terminal cursor is performed.
Next, in step S605, the cursor position after the cursor control is displayed, and the process returns to step S601.

  As described above, according to the first embodiment, the cursor operation of the shared area of the host terminal device can be performed from one or a plurality of remote terminal devices. By controlling the movement range of the cursor of the host terminal device and the remote terminal device so as not to go out of the enlarged region when a part of the shared area of the host terminal device is enlarged and displayed over the entire shared area, Can prevent misoperation.

(Second Embodiment)
In the second embodiment, a plurality of remote terminal devices are connected to the host terminal device, the right to perform cursor control of the host device is exclusively managed, and a cursor operation from only one remote terminal device is permitted. . The operation right switching method includes a method of explicitly acquiring / assigning / releasing an operation right by an instruction such as a button press from the host terminal device 20 or the remote terminal device 9, menu selection, etc., a certain time elapse by a timer, etc. There is a method of automatically assigning a control right based on a certain condition.

  Examples of the former method include mouse click, double click, triple click, and pressing of a specific button on the keyboard of the host terminal device 20 or the remote terminal device 9. In addition, there are a specific pattern of mouse movement (mouse gesture), movement of the mouse cursor to a certain area, focus on the coordinate specification area window, and activation.

  As the latter method, there is a method of releasing the operation right at the time of input operation such as start or end of input from the input device, or when a predetermined time has elapsed from the input operation using a timer or the like.

FIG. 2 is a diagram illustrating an example of information stored in the storage unit 3 according to the second embodiment.
The stored information includes a coordinate input device identifier for inputting coordinates to the host terminal device 20, and operation right table information having a table indicating which input device has the right to operate the cursor of the host terminal device 20. is there. Also, forced acquisition setting with information on which input device holds the right to forcibly acquire the operation right even when other input devices are acquiring the operation right, enlargement area rectangular coordinates when the screen is not shown Etc. The operation right table information is updated when the operation right switching method is used.

FIG. 12 is a flowchart illustrating a cursor control processing procedure of the remote terminal device during the enlarged display of the host terminal device according to the second embodiment.
First, it is determined in step S1201 whether or not there has been a cursor movement instruction from the remote terminal device 9, and if there is, the process proceeds to step S1202.
In step S1202, the remote terminal device 9 refers to the operation right table information of FIG. 2 and determines whether or not the host terminal device 20 has the cursor operation right. If the remote terminal apparatus 9 does not have the operation right in step S1202, the process proceeds to S1206, and the cursor movement instruction operation is processed by the cursor control means 14 of the remote terminal apparatus 9 as a local movement process of the remote terminal apparatus 9. I do.

Next, in S1202, when it is determined that the remote terminal device 9 has the operation right, the process proceeds to S1203.
In step S1203, it is determined whether or not the host terminal apparatus 20 is performing an enlarged display. If it is determined in step S1203 that the enlarged display is being performed, the process advances to step S1204.
In step S1204, it is determined whether the cursor movement instruction position is an instruction to move outside the area on the remote terminal device 9 corresponding to the enlarged area of the host terminal device 20. Although the determination here is performed by the remote terminal device 9, the cursor coordinates may be transmitted to the host terminal device 20 to determine whether or not it is an enlarged region within the host terminal device 20. When the determination is made in the host terminal device 20, coordinate information is transmitted from the remote terminal device 9 to the host terminal device 20 from the communication unit 15 in FIG. 1, and the coordinate information received by the host terminal device 20 is used as the cursor control unit 6. Performs the determination process. Next, when it is determined in step S1204 that the movement is outside the enlarged region, the process proceeds to step S1205.

In step S1205, the movement of the cursor of the remote terminal device 9 outside the enlargement designation area is invalidated. Although it is invalidated here, it may be a forced movement to an arbitrary predetermined position. If it is determined in step S1204 that the cursor coordinate instruction position is outside the enlarged display area, the enlarged area of the host terminal device may be moved so that the cursor coordinate instruction position is included in the enlarged area. However, in this case, if the end of the enlarged area has moved to the end of the original shared area, the process proceeds to step S1205, and processing for moving control of the remote terminal cursor is performed.
Next, in step S1206, the cursor position after cursor control is displayed, and the process returns to step S1201.

  As described above, according to the second embodiment, only the remote terminal device having the operation right of the host terminal device can control the pointing cursor of the host terminal device. Then, by controlling the pointing cursor of the remote terminal device so that it does not go out of the enlarged display area corresponding to the host terminal in the remote terminal display screen, the host does not restrict the cursor operation of the terminal that does not have the operation right. Incorrect operation on the terminal can be prevented.

  Each unit constituting the screen display system and each step of the control method of the screen display system in the embodiment of the present invention described above can be realized by operating a program stored in a RAM, a ROM, or the like of the computer. This program and a computer-readable recording medium on which the program is recorded are included in the present invention.

  Further, the present invention can be implemented as, for example, a system, apparatus, method, program, or recording medium, and may be applied to an apparatus composed of a single device. Here, the recording medium refers to a floppy (registered trademark) disk, a hard disk, a magneto-optical disk, an optical disk, a CD-ROM, a CD-R, a DVD-ROM, a DVD-R, a magnetic tape, a nonvolatile memory card, and a ROM. .

  The present invention supplies a software program for realizing the functions of the above-described embodiments directly or remotely to a system or apparatus. In addition, this includes a case where the system or the computer of the apparatus is also achieved by reading and executing the supplied program code.

  Accordingly, since the functions of the present invention are implemented by computer, the program code installed in the computer also implements the present invention. In other words, the present invention includes a computer program itself for realizing the functional processing of the present invention. In that case, as long as it has the function of a program, it may be in the form of object code, a program executed by an interpreter, script data supplied to the OS, and the like.

  Further, the functions of the above-described embodiments are realized by the computer executing the read program. Furthermore, based on the instructions of the program, an OS or the like running on the computer performs part or all of the actual processing, and the functions of the above-described embodiments can be realized by the processing.

  As another method, a program read from a recording medium is first written in a memory provided in a function expansion board inserted into the computer or a function expansion unit connected to the computer. Then, based on the instructions of the program, the CPU or the like provided in the function expansion board or function expansion unit performs part or all of the actual processing, and the functions of the above-described embodiments are also realized by the processing.

1 is a block diagram illustrating an overall configuration of a screen display system according to a first embodiment. It is the figure which showed an example of the information memorize | stored in the memory | storage means which concerns on 2nd Embodiment. 1 is a block diagram illustrating an overall configuration of a screen display system according to a first embodiment. It is the flowchart which showed the process procedure of the cursor control of the host terminal device at the time of the enlarged display instruction | indication concerning 1st Embodiment. It is a flowchart which shows the process sequence of the cursor control of the host terminal device in the enlarged display of the host terminal device which concerns on 1st Embodiment. It is a flowchart which shows the process sequence of the cursor control of the remote terminal device in the enlarged display of the host terminal device which concerns on 1st Embodiment. It is a figure which shows the screen display which is a display means of the host terminal device which concerns on 1st Embodiment. It is the figure which showed an example of the screen display of the remote terminal device connected with the host terminal device which concerns on 1st Embodiment. It is the figure which showed the example of a screen of the host terminal device after the expansion instruction | indication concerning 1st Embodiment. It is the figure which showed the example of a screen of the remote terminal device at the time of the enlarged display of the host terminal device which concerns on 1st Embodiment. It is the figure which showed the example of a screen of the remote terminal device at the time of the enlarged display of the host terminal device which concerns on 1st Embodiment. It is a flowchart which shows the process sequence of the cursor control of the remote terminal device in the enlarged display of the host terminal device which concerns on 2nd Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Display means 2 Control means 3 Storage means 4 Operation right management means 5 Input means 6 Cursor control means 7 Expansion means 8 Communication means 9 Information terminal 10 Network 11 Display means 12 Control means 13 Storage means 14 Cursor control means 15 Communicator 16 Input Means 20 Host terminal device 701 Shared display 702 Shared area 703 Cursor 704 Enlarged area 801 Remote terminal display 802 Coordinate designation area 803 Remote terminal cursor 901 Host screen example at enlarged display 902 Cursor 1001 Remote terminal screen display example 1101 Remote terminal screen display example 1101

Claims (10)

A host terminal device having a shared area operable from a remote terminal device connected via a communication line on the screen, and the remote terminal having a coordinate designation area for operating a pointing cursor displayed in the shared area A screen display system comprising:
An enlarging means for enlarging and displaying a part of the shared area over the entire shared area;
A host terminal cursor for controlling the pointing cursor so that it does not exit from a part of the enlarged shared area when a part of the shared area is enlarged and displayed by the enlargement means. And a screen display system. The remote terminal device has display means for displaying a pointing cursor,
Pointing displayed on the display unit of the remote terminal device corresponding to the pointing cursor displayed on the shared area when a part of the shared area is enlarged and displayed on the entire shared area by the enlargement unit 2. The remote terminal cursor control means for controlling the cursor so as not to exit from the enlarged display area displayed on the display means corresponding to a part of the enlarged shared area. The screen display system described in 1. The host terminal device has an operation right management means for controlling an operation right to operate a pointing cursor displayed in the shared area;
The remote terminal cursor control means displays the pointing cursor displayed on the display means only when it has the operation right, and an enlarged display displayed on the display means corresponding to a part of the enlarged shared area. The screen display system according to claim 2, wherein control is performed so as not to leave the area. A host terminal device having a shared area operable from a remote terminal device connected via a communication line on the screen, and the remote terminal having a coordinate designation area for operating a pointing cursor displayed in the shared area A method for controlling a screen display system comprising:
An enlargement step of enlarging and displaying a part of the shared area over the entire shared area;
A host terminal cursor that controls the pointing cursor so that it does not exit from a part of the enlarged shared area when a part of the shared area is enlarged and displayed in the whole shared area by the enlargement step. And a control step for controlling the screen display system. The remote terminal device has display means for displaying a pointing cursor,
The pointing displayed on the display means of the remote terminal device corresponding to the pointing cursor displayed on the shared area when a part of the shared area is enlarged and displayed on the entire shared area by the enlargement step. 5. The remote terminal cursor control step for controlling the cursor so as not to exit from the enlarged display area displayed on the display means corresponding to a part of the enlarged shared area. A method for controlling the screen display system according to claim 1. The host terminal device has an operation right management means for controlling an operation right to operate a pointing cursor displayed in the shared area;
In the remote terminal cursor control step, an enlarged display displayed on the display means corresponding to a part of the enlarged shared area is displayed with the pointing cursor displayed on the display means only when the user has the operation right. 6. The method of controlling a screen display system according to claim 5, wherein control is performed so as not to leave the area. A host terminal device having a shared area operable from a remote terminal device connected via a communication line on the screen, and the remote terminal having a coordinate designation area for operating a pointing cursor displayed in the shared area A program for controlling the host terminal device in a screen display system comprising:
An enlargement step of enlarging and displaying a part of the shared area over the entire shared area;
A host terminal cursor that controls the pointing cursor so that it does not exit from a part of the enlarged shared area when a part of the shared area is enlarged and displayed in the whole shared area by the enlargement step. A program for causing a computer to execute control steps. A host terminal device having a shared area that can be operated from a remote terminal device connected via a communication line on a screen, a coordinate designation area for operating a pointing cursor displayed in the shared area, and display means A program for controlling the remote terminal device in a screen display system comprising the remote terminal device,
When a part of the shared area is enlarged and displayed on the entire shared area, the pointing cursor displayed on the display unit of the remote terminal device corresponding to the pointing cursor displayed on the shared area is expanded. A program for causing a computer to execute a remote terminal cursor control step for performing control so as not to exit an enlarged display area displayed on the display unit corresponding to a part of the displayed shared area.   A computer-readable recording medium on which the program according to claim 7 or 8 is recorded.   The recording medium is any one of a floppy (registered trademark) disk, a hard disk, a magneto-optical disk, an optical disk, a CD-ROM, a CD-R, a DVD-ROM, a DVD-R, a magnetic tape, a nonvolatile memory card, and a ROM. The recording medium according to claim 9, further comprising:

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