JP2007249536A - Computer system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a computer system for avoiding the deterioration of the responsiveness of movement of a pointer or switching of a computer to be controlled even when the number of unit of computers to be controlled is increased. <P>SOLUTION: Operation object PC5A, 5B and 5C are respectively provided with an input event receiving part 21 for receiving coordinates on a virtual screen multi-address distributed from a control PC1; an own screen determination part 23 for deciding whether or not coordinates on a virtual screen received by the input event receiving part 21 are coordinates in the own-display screen, and for, when the coordinates on the virtual screen are coordinates within the own-display screen, converting the coordinates on the virtual screen into the coordinates on the own-display screen; and an input event execution part 24 for displaying a pointer at the coordinates on the display converted by the own screen determination part 23. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a computer system that operates a plurality of controlled computers using an operation device connected to a control computer.

Conventionally, when one person operates a plurality of computers, it is necessary to arrange a mouse, a keyboard, and a monitor on the desk by the number of computers, and it is necessary to prepare a large work space.
In addition, when changing the computer to be operated, it is necessary to move and operate in front of the mouse, keyboard and monitor of the computer to be operated, so that the work is interrupted each time and the work efficiency is lowered.

Therefore, a computer system using a computer switch has been developed so that a plurality of computers can be operated using a set of mouse, keyboard and monitor.
A computer switch is a switch that mechanically switches the input / output signals of a set of keyboard, mouse, and monitor, and selectively sends input / output signals to the input / output terminals of one computer's keyboard, mouse, and monitor. By inputting and outputting, a plurality of computers can be operated using a set of keyboard, mouse and monitor.
Thereby, a space for placing a keyboard, a mouse, and a monitor is sufficient, and operation switching of the computer can be easily performed, so that work efficiency can be improved.
However, since the user needs to consciously perform an operation of switching with a switch and cannot be switched automatically, work efficiency may be reduced.

Patent Document 1 below discloses a computer system that can automatically switch a computer to be operated.
That is, in Patent Document 1 below, the display screens of a plurality of computers are virtually arranged in accordance with the layout of a plurality of computers, and when the pointer moves in accordance with the operation of the mouse, the pointer is displayed. A computer switching device that determines whether or not the boundary of the display screen of each computer has been exceeded is disclosed.
The computer switching device performs a process of switching the operation target computer when the mouse pointer crosses the boundary of the display screen of each computer.

JP-A-11-31064 (paragraph numbers [0014] to [0027], FIG. 1)

  Since the conventional computer system is configured as described above, the computer switching device performs a determination process for determining whether or not the mouse pointer exceeds the boundary of the display screen of each computer. If the boundary of the computer display screen is exceeded, the operation target computer is switched. However, since the load of the determination process of the computer switching device increases in proportion to the number of computers, when the number of computers increases, the load of the determination process increases, and the movement of the mouse pointer or computer switching There was a problem that the responsiveness might deteriorate.

  The present invention has been made to solve the above-described problems, and even when the number of controlled computers increases, it is possible to avoid deterioration in responsiveness of pointer movement and switching of controlled computers. The purpose is to obtain a computer system.

  In the computer system according to the present invention, the control computer has a correspondence between the event acquisition screen displayed on the display monitor and the virtual screen arranged so that the display screens of the plurality of controlled computers are virtually continuous. Coordinate conversion means for managing the relationship and converting the coordinates of the pointer on the event acquisition screen that moves with the operation of the operation device into coordinates on the virtual screen, and the coordinates on the virtual screen converted by the coordinate conversion means Broadcast distribution means for broadcasting to a plurality of controlled computers, and a plurality of controlled computers for receiving coordinates on the virtual screen broadcast from the control computer; It is determined whether or not the coordinates on the virtual screen received by the coordinate receiving means are the coordinates on its own display screen, and if they are the coordinates on its own display screen, the coordinates on the virtual screen are displayed on its own. On screen A coordinate determination means for converting target is obtained by so and an event execution means for displaying the pointer coordinates on converted display screen by the coordinate determining means.

  According to this invention, the control computer has a correspondence relationship between the event acquisition screen displayed on the display monitor and the virtual screen arranged so that the display screens of the plurality of controlled computers are virtually continuous. A coordinate conversion unit that converts the coordinates of the pointer on the event acquisition screen that moves in accordance with the operation of the operation device to a coordinate on the virtual screen, and a plurality of coordinates on the virtual screen converted by the coordinate conversion unit Broadcast receiving means for delivering a broadcast to a controlled computer, and a plurality of controlled computers for receiving coordinates on the virtual screen broadcast from the controlling computer, and the coordinates It is determined whether or not the coordinates on the virtual screen received by the receiving means are the coordinates on the own display screen. If the coordinates are on the own display screen, the coordinates on the virtual screen are displayed on the own display screen. Convert to coordinates Since it is configured to include the mark determination means and the event execution means for displaying the pointer at the coordinates on the display screen converted by the coordinate determination means, even if the number of controlled computers increases, the pointer movement or There is an effect that it is possible to avoid the deterioration of the response of switching the controlled computer.

Embodiment 1 FIG.
FIG. 1 is a block diagram showing a computer system according to Embodiment 1 of the present invention. In the figure, a control PC 1 is connected to a mouse 2 and a keyboard 3, and the operated PC 5 A, It is the computer for control which operates 5B and 5C.
The mouse 2 is an operation device for operating the movement of the pointer on the event acquisition screen displayed on the display monitor 4, for example. The mouse 2 is a mouse movement event for notifying the movement of the pointer (the mouse movement event includes a movement of the pointer). The previous new coordinates are included). The mouse 2 is provided with a plurality of operation buttons. When any one of the operation buttons is pressed, a mouse button down event for notifying information indicating which operation button is pressed or an operation button on the mouse is displayed. When released, it generates a mouse button up event notifying information indicating whether the operation button has been released.
The keyboard 3 is an operation device for inputting characters, numbers, and the like. When any key is depressed, the keyboard 3 displays a key down event for notifying character information indicating the inputted character or the like, or a depressed key. When released, it generates a key-up event that notifies information indicating which key was released.
The display monitor 4 is connected to the control PC 1 and displays an event acquisition screen for inputting an event using the mouse 2 and the keyboard 3.

The operated PCs 5A, 5B, and 5C are connected to the control PC 1 via the network 7 and are controlled computers that are operated by the control PC 1. The operated PCs 5A, 5B, and 5C include a mouse and a keyboard (not shown), and display various application program windows, operation contents of the control PC 1, and the like on the display monitors 6A, 6B, and 6C.
The network 7 is a network capable of broadcast communication, and corresponds to, for example, “Ethernet (registered trademark)”. However, the network is not limited to “Ethernet (registered trademark)”, and other networks may be used as long as broadcast communication is possible.
In the example of FIG. 1, three operated PCs 5A, 5B, and 5C are connected to the network 7, but the present invention is not limited to this, and four or more operated PCs may be connected.

FIG. 2 is a block diagram showing the inside of the control PC 1 and the operated PCs 5A, 5B, 5C of the computer system according to Embodiment 1 of the present invention.
In the figure, an input event acquisition unit 11 of the control PC 1 performs a process of acquiring an event generated by the mouse 2 and the keyboard 3.
The virtual screen management unit 12 of the control PC 1 causes the event acquisition screen displayed on the display monitor 4 and the display screens displayed on the display monitors 6A, 6B, 6C of the operated PCs 5A, 5B, 5C to be virtually continuous. It manages the correspondence with the virtual screens arranged in
When the event acquired by the input event acquisition unit 11 is a mouse movement event, the virtual screen pointer position calculation unit 13 of the control PC 1 determines the correspondence between the event acquisition screen managed by the virtual screen management unit 12 and the virtual screen. Referring to this, a process is performed for converting the coordinates of the movement destination of the pointer on the event acquisition screen included in the mouse movement event into the coordinates on the virtual screen.

The virtual screen pointer position storage unit 14 of the control PC 1 is a memory that stores the coordinates on the virtual screen converted by the virtual screen pointer position calculation unit 13.
The input event acquisition unit 11, the virtual screen management unit 12, the virtual screen pointer position calculation unit 13, and the virtual screen pointer position storage unit 14 constitute coordinate conversion means.
The input event transmission unit 15 of the control PC 1 broadcasts the event acquired by the input event acquisition unit 11 and the coordinates on the virtual screen stored in the virtual screen pointer position storage unit 14 to the operated PCs 5A, 5B, and 5C. . The input event transmitting unit 15 constitutes a broadcast distribution unit.

The input event receiving unit 21 of the operated PCs 5A, 5B, and 5C performs a process of receiving the broadcasted event from the control PC 1 and the coordinates on the virtual screen. The input event receiving unit 21 constitutes a coordinate receiving unit.
The virtual screen arrangement information storage unit 22 of the operated PCs 5A, 5B, and 5C is a memory that stores a correspondence relationship of its own display screen (display screen displayed on the display monitors 6A, 6B, and 6C) with respect to the virtual screen. This correspondence is transmitted from the control PC 1 in advance.
The own screen determination unit 23 of the operated PCs 5A, 5B, 5C is received by the input event reception unit 21 with reference to the correspondence relationship of its display screen with the virtual screen stored in the virtual screen arrangement information storage unit 22. Processing to determine whether the coordinates on the virtual screen are the coordinates on its own display screen, and if the coordinates are on its own display screen, convert the coordinates on the virtual screen to the coordinates on its own display screen To implement.
The virtual screen arrangement information storage unit 22 and the own screen determination unit 23 constitute coordinate determination means.

  When the event received by the input event receiving unit 21 is a mouse movement event, the input event executing unit 24 of the operated PCs 5A, 5B, and 5C points to the coordinates on the display screen converted by the own screen determining unit 23. If the event received by the input event receiving unit 21 is an event other than a mouse movement event, the event is executed at the coordinates on the display screen converted by the self-screen determining unit 23. The input event execution unit 24 constitutes an event execution unit.

  In the example of FIG. 1, the input event acquisition unit 11, the virtual screen management unit 12, the virtual screen pointer position calculation unit 13, and the input event transmission unit 15 that are components of the control PC 1 are implemented with dedicated hardware (for example, MPU). The input event receiving unit 21, the self-screen determining unit 23, and the input event executing unit 24, which are constituent elements of the operated PCs 5A, 5B, and 5C, are configured with dedicated hardware (for example, a semiconductor integrated circuit board). , A semiconductor integrated circuit board on which an MPU or the like is mounted), an input event acquisition unit 11, a virtual screen management unit 12, and a virtual screen pointer position calculation, which are components of the control PC 1. The program describing the processing contents of the unit 13 and the input event transmission unit 15 is stored in the memory of the control PC 1, and the CPU of the control PC 1 You may execute a program stored in the memory. In addition, a program describing the processing contents of the input event receiving unit 21, the self-screen determining unit 23, and the input event executing unit 24 that are constituent elements of the operated PCs 5A, 5B, and 5C is stored in the memory of the operated PCs 5A, 5B, and 5C. The CPUs of the operated PCs 5A, 5B, and 5C may execute the program stored in the memory.

Next, the operation will be described.
The input event acquisition unit 11 of the control PC 1 displays an event acquisition screen as shown in FIG. 8 on the display monitor 4 by executing a program that enables acquisition of events generated by the mouse 2 and the keyboard 3. .
The pointer for mouse 2 is displayed on the event acquisition screen. When the user moves mouse 2, the pointer moves on the event acquisition screen, and mouse 2 generates a mouse movement event that includes the coordinates of the destination of the pointer. To do.
Thus, the input event acquisition unit 11 of the control PC 1 acquires a mouse movement event including the coordinates of the movement destination of the pointer. For example, if the window size of the event acquisition screen is 1024 × 768 pixels, The coordinates of the movement destination are in the range of 0 to 1023 in the X direction and 0 to 767 in the Y direction.

The virtual screen management unit 12 of the control PC 1 virtually has an event acquisition screen displayed on the display monitor 4 and a display screen displayed on the display monitors 6A, 6B, 6C of the operated PCs 5A, 5B, 5C. The correspondence relationship with the virtual screens arranged in this way is managed.
In other words, the virtual screen management unit 12 manages the window size of the event acquisition screen as shown in FIG. 8, and also manages the window size of the virtual screen as shown in FIG.
FIG. 3 shows a virtual screen in which display screens displayed on the display monitors 6A, 6B, and 6C of the operated PCs 5A, 5B, and 5C are arranged in one horizontal row.
In the example of FIG. 3, since the screen size of the display screen displayed on the display monitors 6A, 6B, and 6C of the operated PCs 5A, 5B, and 5C is 1024 × 768 pixels, the screen size of the virtual screen is 3072 × 768 pixels. become.

FIG. 4 is an explanatory diagram showing the correspondence between the display screens of the operated PCs 5A, 5B, and 5C with respect to the virtual screen, and this correspondence is managed by the virtual screen management unit 12.
In the example of FIG. 4, the name includes the names of the operated PCs 5A, 5B, and 5C, the screen position of the display screen (the coordinates of the upper left corner of the screen) with respect to the virtual screen, and the screen size of the display screen.
Since the display screen of the operated PC 5A is arranged on the leftmost side of the virtual screen, the screen position is (0, 0).
Further, since the display screen of the operated PC 5B is arranged at the center of the virtual screen, the screen position is (1024, 0).
Further, since the display screen of the operated PC 5C is arranged on the rightmost side of the virtual screen, the screen position is (2048, 0).

When the input event acquisition unit 11 acquires a mouse movement event, the virtual screen pointer position calculation unit 13 of the control PC 1 refers to the correspondence between the event acquisition screen and the virtual screen managed by the virtual screen management unit 12. The coordinates of the movement destination of the pointer on the event acquisition screen included in the mouse movement event are converted to the coordinates on the virtual screen.
Specifically, the coordinates of the movement destination of the pointer on the event acquisition screen are converted into the coordinates on the virtual screen as follows.

In the first embodiment, the window size of the event acquisition screen managed by the virtual screen management unit 12 is 1024 × 768 pixels, and the screen size of the virtual screen managed by the virtual screen management unit 12 is 3072 ×. Since the pointer is 768 pixels, when the pointer moves in the range of 0 to 1023 in the X direction and 0 to 767 in the Y direction on the event acquisition screen, the pointer is 0 to 3071 in the X direction and 0 in the Y direction on the virtual screen. It is necessary to convert to move within the range of ˜767.
Therefore, the virtual screen pointer position calculation unit 13 converts the coordinates of the movement destination of the pointer on the event acquisition screen into the coordinates on the virtual screen using the following conversion formulas (1) and (2).
X coordinate on virtual screen = X coordinate of pointer on event acquisition screen x X direction conversion coefficient (1)
Y coordinate on virtual screen = Y coordinate of pointer on event acquisition screen x Y direction conversion coefficient (2)
However,
X direction conversion coefficient = number of pixels in the X direction of the virtual screen / number of pixels in the X direction of the event acquisition screen (3)
Y direction conversion coefficient = number of pixels in the Y direction of the virtual screen / number of pixels in the Y direction of the event acquisition screen (4)

For example, as shown in FIG. 6, when a mouse movement event occurs in which the pointer on the event acquisition screen moves from the position of coordinates (340, 500) to the position of coordinates (342, 502), the event acquisition screen is displayed. The coordinates (342, 502) of the movement destination of the pointer are converted into coordinates (1026, 502) on the virtual screen as shown below.
X direction conversion coefficient = 3072/1024 = 3
Y direction conversion coefficient = 768/768 = 1
X coordinate on virtual screen = 342 × 3 = 1026
Y coordinate on virtual screen = 502 × 1 = 502

When the virtual screen pointer position calculation unit 13 of the control PC 1 converts the coordinates (342, 502) of the pointer movement destination on the event acquisition screen to the coordinates (1026, 502) on the virtual screen, the coordinates (1026, 502) on the virtual screen ( 1026, 502) are stored in the virtual screen pointer position storage unit 14.
When receiving the mouse movement event acquired by the input event acquisition unit 11 from the virtual screen pointer position calculation unit 13, the input event transmission unit 15 of the control PC 1 stores the mouse movement event and the virtual screen pointer position via the network 7. The coordinates (1026, 502) on the virtual screen stored in the unit 14 are broadcast to the operated PCs 5A, 5B, 5C.

As a result, the input event receiving unit 21 of the operated PCs 5A, 5B, and 5C receives the mouse movement event broadcast from the control PC 1 and the coordinates (1026, 502) on the virtual screen.
When the input event reception unit 21 receives the mouse movement event and the coordinates (1026, 502) on the virtual screen, the self-screen determination unit 23 of the operated PC 5A applies to the virtual screen stored in the virtual screen arrangement information storage unit 22. With reference to the correspondence relationship of its own display screen (see FIG. 5A), it is determined whether or not the coordinates (1026, 502) on the virtual screen are the coordinates in its own display screen.

Specifically, it is determined whether or not the coordinates on the virtual screen are the coordinates in the display screen of the user as follows.
If the following conditional expression A and conditional expression B are satisfied, the own screen determination unit 23 of the operated PC 5A determines that the coordinates on the virtual screen are the coordinates in its own display screen.
・ Condition A
X coordinate of screen position on own display screen ≤ X coordinate of pointer on virtual screen <X coordinate of screen position on own display screen + screen size in X direction / conditional expression B
Y coordinate of screen position on own display screen ≦ Y coordinate of pointer on virtual screen <Y coordinate of screen position on own display screen + screen size in Y direction

In the example of FIG. 6, since the coordinates on the virtual screen are (1026, 502), as shown below, conditional expression B is satisfied, but conditional expression A is not satisfied. It is determined that the coordinates (1026, 502) on the virtual screen are not the coordinates in the display screen of the user.
Conditional expression A
0 ≦ 1026 <1024
・ Condition B
0 ≦ 502 <768
When the own screen determination unit 23 of the operated PC 5A determines that the coordinates (1026, 502) on the virtual screen are not the coordinates in the own display screen, it is not necessary to display the mouse pointer in the own display screen. Therefore, the mouse movement event acquired by the input event receiving unit 21 is discarded.

When the input event receiving unit 21 receives the mouse movement event and the coordinates (1026, 502) on the virtual screen, the self-screen determining unit 23 of the operated PC 5B is similar to the self-screen determining unit 23 of the operated PC 5A. With reference to the correspondence relationship of the display screen with the virtual screen stored in the arrangement information storage unit 22 (see FIG. 5B), the coordinates (1026, 502) on the virtual screen are within the display screen of the display device. It is determined whether or not the coordinates are.
In the example of FIG. 6, since the coordinates on the virtual screen are (1026, 502), both the conditional expression A and the conditional expression B are satisfied as shown below. It is determined that the upper coordinates (1026, 502) are the coordinates in the display screen of the user.
・ Condition A
1024 ≦ 1026 <2048
・ Condition B
0 ≦ 502 <768

When the own screen determination unit 23 of the operated PC 5B determines that the coordinates (1026, 502) on the virtual screen are the coordinates on the own display screen, the coordinates (1026, 502) on the virtual screen are displayed on the own display screen. Convert to the above coordinates.
That is, the own screen determination unit 23 converts the coordinates on the virtual screen into the coordinates on its own display screen using the following conversion formulas (5) and (6).
X coordinate of own display screen = X coordinate of pointer on virtual screen-X coordinate of screen position on own display screen (5)
Y coordinate of own display screen = Y coordinate of pointer on virtual screen-Y coordinate of screen position on own display screen (6)
In the example of FIG. 6, since the coordinates on the virtual screen are (1026, 502), as shown below, the coordinates (1026, 502) on the virtual screen are changed to the coordinates (2, 502) on its own display screen. Convert to
X coordinate of own display screen = 1026-1024 = 2
Y coordinate of own display screen = 502-0 = 502

When the own screen determination unit 23 converts the coordinates (1026, 502) on the virtual screen to the coordinates (2,502) on its own display screen, the input event execution unit 24 of the operated PC 5B A mouse pointer is displayed at the coordinates (2,502).
That is, the input event execution unit 24 displays the mouse pointer at coordinates (1026, 502) on the display screen of the display monitor 6B as shown in FIG.

When the input event reception unit 21 receives the mouse movement event and the coordinates (1026, 502) on the virtual screen, the self-screen determination unit 23 of the operated PC 5C is similar to the self-screen determination unit 23 of the operated PC 5A. With reference to the correspondence relationship of the display screen with the virtual screen stored in the arrangement information storage unit 22 (see FIG. 5C), the coordinates (1026, 502) on the virtual screen are within the display screen of the display device. It is determined whether or not the coordinates are.
In the example of FIG. 6, since the coordinates on the virtual screen are (1026, 502), as shown below, conditional expression B is satisfied, but conditional expression A is not satisfied. It is determined that the coordinates (1026, 502) on the virtual screen are not the coordinates in the display screen of the user.
Conditional expression A
2048 ≦ 1026 <3072
・ Condition B
0 ≦ 502 <768
If the own screen determination unit 23 of the operated PC 5C determines that the coordinates (1026, 502) on the virtual screen are not the coordinates in the own display screen, the mouse pointer does not need to be displayed in the own display screen. Therefore, the mouse movement event acquired by the input event receiving unit 21 is discarded.

  As a result, the mouse pointer displayed on the display screen of the display monitor 6A moves to the display screen of the display monitor 6B, so that the operation target PC of the control PC 1 is changed from the operated PC 5A to the operated PC 5B. The

Next, when the pointer on the event acquisition screen is at the position of coordinates (340, 500) (see FIG. 7), the user operates the keyboard 3 to show the key-down event indicating the input information of the character “A”. The operation when this occurs will be described.
The input event acquisition unit 11 of the control PC 1 acquires a key down event indicating input information of the character “A”.

Since the event acquired by the input event acquisition unit 11 is not a mouse movement event, the virtual screen pointer position calculation unit 13 of the control PC 1 is acquired by the input event acquisition unit 11 without performing the coordinate conversion processing of the pointer. The key down event is output to the input event transmission unit 15.
When receiving the keydown event acquired by the input event acquisition unit 11 from the virtual screen pointer position calculation unit 13, the input event transmission unit 15 of the control PC 1 stores the keydown event and the virtual screen pointer position via the network 7. The coordinates (1020, 500) on the virtual screen stored in the unit 14 are broadcast to the operated PCs 5A, 5B, 5C.
The virtual screen pointer position storage unit 14 converts the pointer on the event acquisition screen to the coordinates (340, 500) last time in accordance with the operation of the mouse 2 by the virtual screen pointer position calculation unit 13. The coordinates (1020,500) on the virtual screen thus stored are stored.

As a result, the input event receiving unit 21 of the operated PCs 5A, 5B, and 5C receives the key-down event broadcast from the control PC 1 and the coordinates (1020, 500) on the virtual screen.
When the input event reception unit 21 receives the key-down event and the coordinates (1020, 500) on the virtual screen, the own screen determination unit 23 of the operated PC 5 </ b> A applies the virtual screen stored in the virtual screen arrangement information storage unit 22. With reference to the correspondence relationship of its own display screen (see FIG. 5A), it is determined whether or not the coordinates (1020, 500) on the virtual screen are the coordinates in its own display screen.
In the example of FIG. 7, since the coordinates on the virtual screen are (1020,500), both conditional expression A and conditional expression B are satisfied as shown below. It is determined that the upper coordinate (1020, 500) is the coordinate in its own display screen.
Conditional expression A
0 ≦ 1020 <1024
・ Condition B
0 ≦ 500 <768

When the own screen determination unit 23 of the operated PC 5A determines that the coordinates (1020, 500) on the virtual screen are the coordinates in the own display screen, the coordinates (1020, 500) on the virtual screen are displayed on the own display screen. Convert to the above coordinates.
That is, the own screen determination unit 23 converts the coordinates on the virtual screen into the coordinates on its own display screen using the above conversion formulas (5) and (6).
In the example of FIG. 7, since the coordinates on the virtual screen are (1020,500), as shown below, the coordinates (1020,500) on the virtual screen are changed to the coordinates (1020,500) on its own display screen. Convert to
X coordinate of own display screen = 1020-0 = 1020
Y coordinate of own display screen = 500-0 = 500

  When the own screen determination unit 23 converts the coordinates (1020, 500) on the virtual screen to the coordinates (1020, 500) on its own display screen, the input event execution unit 24 of the operated PC 5A The character “A” is displayed at the coordinates (1020, 500).

When the input event receiving unit 21 receives the key-down event and the coordinates (1020, 500) on the virtual screen, the self-screen determining unit 23 of the operated PC 5B is similar to the self-screen determining unit 23 of the operated PC 5A. Referring to the correspondence relationship of the display screen with the virtual screen stored in the arrangement information storage unit 22 (see FIG. 5B), the coordinates (1020, 500) on the virtual screen are within the display screen of the self. It is determined whether or not the coordinates are.
In the example of FIG. 7, since the coordinates on the virtual screen are (1020, 500), as shown below, conditional expression B is satisfied, but conditional expression A is not satisfied. It is determined that the coordinates (1020, 500) on the virtual screen are not the coordinates in its own display screen.
Conditional expression A
1024 ≦ 1020 <2048
・ Condition B
0 ≦ 500 <768
When the own screen determination unit 23 of the operated PC 5B determines that the coordinates (1020, 500) on the virtual screen are not the coordinates in the own display screen, the character “A” needs to be displayed in the own display screen. Therefore, the key down event acquired by the input event receiving unit 21 is discarded.

When the input event receiving unit 21 receives the key-down event and the coordinates (1020, 500) on the virtual screen, the self-screen determining unit 23 of the operated PC 5C is similar to the self-screen determining unit 23 of the operated PC 5A. With reference to the correspondence relationship of the display screen with the virtual screen stored in the arrangement information storage unit 22 (see FIG. 5C), the coordinates (1020, 500) on the virtual screen are within the display screen of the display device. It is determined whether or not the coordinates are.
In the example of FIG. 7, since the coordinates on the virtual screen are (1020, 500), as shown below, conditional expression B is satisfied, but conditional expression A is not satisfied. It is determined that the coordinates (1020, 500) on the virtual screen are not the coordinates in its own display screen.
Conditional expression A
2048 ≦ 1026 <3072
・ Condition B
0 ≦ 500 <768
When the own screen determination unit 23 of the operated PC 5C determines that the coordinates (1020, 500) on the virtual screen are not the coordinates in the own display screen, the character “A” needs to be displayed in the own display screen. Therefore, the key down event acquired by the input event receiving unit 21 is discarded.

  As is apparent from the above, according to the first embodiment, the control PC 1 causes the event acquisition screen displayed on the display monitor 4 and the display screens of the operated PCs 5A, 5B, and 5C to be virtually continuous. A virtual screen pointer position calculation unit 13 that manages the correspondence with the arranged virtual screen and converts the coordinates of the pointer on the event acquisition screen that moves in accordance with the operation of the mouse 2 to the coordinates on the virtual screen; An input event transmission unit 15 that broadcasts the coordinates on the virtual screen converted by the virtual screen pointer position calculation unit 13 to the operated PCs 5A, 5B, and 5C, and the operated PCs 5A, 5B, and 5C are connected from the control PC 1 The input event receiving unit 21 that receives the broadcasted coordinates on the virtual screen, and the coordinates on the virtual screen received by the input event receiving unit 21 are the coordinates in its own display screen. If it is a coordinate in its own display screen, it is converted by the own screen determination unit 23 that converts the coordinate on the virtual screen into the coordinate on its own display screen, and the own screen determination unit 23 Since the input event execution unit 24 for displaying the pointer at the coordinates on the display screen is provided, even if the number of operated PCs increases, the deterioration of the responsiveness of the movement of the pointer and the switching of the operated PC is avoided. The effect which can be done is produced.

  That is, according to the first embodiment, it is not necessary for the control PC 1 to perform a determination process for determining on which display screen of the operated PC the pointer on the event acquisition screen is displayed. Even if the number of operation PCs increases, the processing load of the control PC 1 does not increase. For this reason, even if the number of operated PCs increases, it is possible to avoid the deterioration of the responsiveness of the movement of the pointer and the switching of the operated PC.

  Further, according to the first embodiment, when a key down event indicating input information of the character “A”, for example, is input from the keyboard 3 on the event acquisition screen, the input event transmission unit 15 of the control PC 1 displays the virtual screen. A key-down event is broadcast to the operated PCs 5A, 5B, and 5C together with the upper coordinates, and the own screen determination unit 23 of the operated PCs 5A, 5B, and 5C has the coordinates on the display screen of the own PC. If it is determined that the input event execution unit 24 displays the character “A” at the coordinates in its own display screen, even if the number of operated PCs increases, the character “A” is quickly displayed. There is an effect that it can be displayed on an appropriate display screen.

In the first embodiment, when the user operates the keyboard 3 and a key down event indicating input information of the character “A” occurs, the character “A” is displayed on the display screen of the operated PC. However, the occurrence of a key-down event indicating input information of the character “A” is not limited to displaying the character “A” on the display screen of the operated PC.
For example, software corresponding to character input information may be started on the operated PC, or processing corresponding to character input information may be executed by the operated PC.

BRIEF DESCRIPTION OF THE DRAWINGS It is a block diagram which shows the computer system by Embodiment 1 of this invention. It is a block diagram which shows the inside of control PC and to-be-operated PC of the computer system by Embodiment 1 of this invention. It is explanatory drawing which shows the virtual screen by which the display screen displayed on display monitor 6A, 6B, 6C of to-be-operated PC5A, 5B, 5C is arrange | positioned at 1 horizontal row. It is explanatory drawing which shows the correspondence of the display screen of operated PC5A, 5B, 5C with respect to a virtual screen. It is explanatory drawing which shows the correspondence of the self display screen with respect to a virtual screen. It is explanatory drawing which shows operation | movement when a mouse | mouth movement event is acquired. It is explanatory drawing which shows operation | movement when a key down event is acquired. It is explanatory drawing which shows the screen for event acquisition.

Explanation of symbols

  1 control PC (control computer), 2 mouse (operation device), 3 keyboard (operation device), 4 display monitor, 5A, 5B, 5C operated PC (controlled computer), 6A, 6B, 6C display monitor, 7 Network, 11 Input event acquisition unit (coordinate conversion unit), 12 Virtual screen management unit (coordinate conversion unit), 13 Virtual screen pointer position calculation unit (coordinate conversion unit), 14 Virtual screen pointer position storage unit (coordinate conversion unit) , 15 input event transmission unit (broadcast distribution unit), 21 input event reception unit (coordinate reception unit), 22 virtual screen arrangement information storage unit (coordinate determination unit), 23 own screen determination unit (coordinate determination unit), 24 input Event execution unit (event execution means).

Claims (2)

  In a computer system comprising a control computer to which an operation device and a display monitor are connected, and a plurality of controlled computers connected to the control computer via a network, the control computer has Manages the correspondence between the event acquisition screen displayed on the display monitor and the virtual screens arranged so that the display screens of the plurality of controlled computers are virtually continuous. Coordinate conversion means for converting the coordinates of the pointer on the event acquisition screen that moves with the coordinates into the coordinates on the virtual screen, and the coordinates on the virtual screen converted by the coordinate conversion means as the plurality of controlled computers And a plurality of controlled computers receive the coordinates on the virtual screen broadcast from the control computer. It is determined whether the coordinates on the virtual screen received by the mark receiving means and the coordinate receiving means are the coordinates in its own display screen. A computer system comprising: coordinate determination means for converting coordinates to coordinates on its own display screen; and event execution means for displaying a pointer at coordinates on the display screen converted by the coordinate determination means. .   When an event is input from the operation device on the event acquisition screen, the broadcast distribution means of the control computer broadcasts the event to a plurality of controlled computers together with the coordinates on the virtual screen. 2. The computer system according to claim 1, wherein the event execution means executes the event when the coordinate determination means of the controlled computer determines that the coordinates on the virtual screen are coordinates in its own display screen. .

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