KR20140069661A

KR20140069661A - Display control system of dual computer and method thereof

Info

Publication number: KR20140069661A
Application number: KR1020120137211A
Authority: KR
Inventors: 마정환; 채기병
Original assignee: 주식회사 에이텍
Priority date: 2012-11-29
Filing date: 2012-11-29
Publication date: 2014-06-10

Abstract

Disclosed are a display control system of a dual computer and a method thereof which are capable of simultaneously displaying screens of the dual personal computer (PC) on a monitor such that the screens are not overlapped with each other. The disclosed display control system of a dual computer includes: first and second computers which form the dual computer; a computer selecting device which selectively connects an input device, which inputs an operation signal to the first and second computers, to the first and second computers; and a monitor which selects one of first and second images outputted by the first and second computers according to a selection of a screen by a user and displays the selected image on the selected screen, or divides the first and second images on a screen and displays the first and second images at the same time, wherein the monitor displays the images by varying an aspect ratio of the screen divided according to the selection of the user.

Description

[0001] Display control system and method thereof [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display control of a dual computer, and more particularly, to a display control system and a display control method of a dual computer which can simultaneously implement a dual-personal computer (PC) .

In general, the communication environment using a computer such as the Internet is rapidly expanding, and a communication environment in which mutual settlement and data are transferred by networking by installing a self-networking network for building an internal system among these communication environments is increasing.

If such networking is networking such as a military or nuclear power plant requiring national security, there is a fear of a hacker's intrusion, and if a hacker breaks into a defense network and causes a missile control error or malfunction, It means fatal damage. In addition, even when a hacker breaks into a financial institution, if a situation occurs in which an unauthorized withdrawal of a customer's deposit occurs, this also causes a catastrophic damage to the computer system and a reliability deterioration to the customer.

In order to prevent such damage and damage to the system, it has been proposed that the external network and the internal network are separated and two separate computers are provided (hereinafter, referred to as "dual computer") for the internal network and the external network It is recommended to use.

For example, a first computer including a first monitor, a first keyboard, a first main body, and an LAN card connecting an internal network (LAN network); And a second computer including a modem using a second monitor, a second keyboard, a second main body, and an external network (Internet network), and selects and uses a corresponding computer according to a desired network.

In this case, since the keyboard and the monitor are used individually as in the case of the two keyboards and the two monitors, inconvenience occurs. In order to overcome such inconvenience, a proposal recently proposed is to operate two computers And simultaneously displays the screens of the two computers using one monitor.

In particular, since most modern display devices support a multi-screen division function such as PIP (Picture in Picture) or PBP (Picture by Picture), it is possible to simultaneously display two computer screens using one monitor .

Here, the PIP is a display in which a small screen is superimposed on a large screen, and PBP is a display that displays two or more screens on the entire screen without overlapping each other. Normally, a PC and a TV are connected to a single display device, .

The prior art for PBP is disclosed in Korean Patent Application Publication No. 10-2009-0022297 (published on Mar. 04, 2009) (name of the invention: display control method, display device and display system using the same).

The disclosed prior art detects a change command to a multi-screen split mode (PBP mode), and displays an image for a video signal whose resolution is changed according to the size of the split screen of the display on the split screen when the change command is detected.

For example, when the user changes the mode of the display device, the optimum resolution is automatically changed according to the size of the screen. Whenever the mode is changed (for example, PBP mode -> general mode, > PBP mode) It solves the inconvenience that the user has to fix the resolution one by one.

1. Title of the Invention: Display Control Method, Display Apparatus and Display System Using the Same, Patent Application Publication No. 10-2009-0022297 (Published on Mar. 04, 2009)

However, the above-described conventional technology can display two images such as a PC and a TV on a screen in a screen division manner, but it is impossible to implement a screen switching of an input / output device in a dual computer using different networks have.

For example, according to the related art, it is impossible to share an input / output device with a first computer and a second computer, and to divide and display the screen together or separately.

In addition, the conventional and conventional dual computer systems have a disadvantage in that it is impossible to vary the aspect ratio when displaying two images on one screen in a screen division manner.

Accordingly, the present invention has been made to solve the above problems occurring in the conventional dual computers and the related art,

SUMMARY OF THE INVENTION It is an object of the present invention to provide a dual-computer display control system and a method thereof, in which a screen of a dual personal computer (PC) can be simultaneously implemented on a single monitor without overlapping each other.

Another object of the present invention is to provide a display control system and method for a dual computer capable of changing a screen ratio according to a user's selection when a dual computer screen is simultaneously implemented on a single screen in a screen division manner I have to.

According to an aspect of the present invention, there is provided a display control system for a dual computer,

A first computer and a second computer;

A computer selection device for selectively connecting an input device for inputting operation signals to the first computer and the second computer to the first computer and the second computer;

According to the screen selection of the user, one of the first image and the second image outputted from the first computer and the second computer is selected and displayed on the screen, or the first image and the second image are divided into one screen A monitor for simultaneous display,

And the monitor varies the screen ratio of the divided screen according to the selection of the user.

The monitor may change a screen ratio of a screen selected by the user among the divided screens.

The monitor may further include an input / output device selector for selecting the input device and the output screen image.

Wherein the input / output device selection unit comprises: a PC signal input unit for generating an input / output device selection signal when operating a program installed for switching the input / output device;

An OSD executing unit for executing an OSD provided for setting a function of the display unit and generating an input / output device selection signal;

And a button input unit for generating an input / output device selection signal when operating a button provided for switching the input / output device.

The monitor may further include a first image input unit and a second image input unit for receiving images output from the first computer and the second computer, respectively;

A multiplexer for selecting and outputting a first image and a second image output from the first image input unit and the second image input unit;

And a monitor interface board configured to select and display the first and second images corresponding to the selected screen when the output screen image is selected through the input / output device selection unit.

The monitor interface board includes a monitor input unit receiving an external signal including an input device selection signal, a configuration screen selection signal, and a screen non-variable signal;

And a monitor controller for controlling the screen display of the first image and the second image output from the multiplexer according to an external signal input through the monitor input unit.

In this case, when the user clicks a screen to be changed by the user, the monitor control unit recognizes the screen to be changed on the divided screen, and when the user inputs the size adjusting signal of the screen, And the like.

The monitor interface board may further include an image processor for implementing the input image in one screen according to a path selection signal and a screen ratio control signal generated by the monitor controller, .

The image processing unit may include an image path selection unit for selecting a path of an input image according to an image path selection signal;

An image processor for implementing an image transmitted through the image path selector in one screen;

A split screen processing unit which implements the images transmitted through the image path selection unit so as not to overlap each other on the divided screen;

A screen non-varying unit for changing a screen ratio of the divided screen processed by the divided screen processing unit;

And an image output unit for outputting a screen image output through the image processing unit or the screen unaltered unit.

According to another aspect of the present invention, there is provided a method of controlling a display of a dual computer,

(a) receiving a first image and a second image respectively output from the first computer and the second computer;

(b) checking whether the user has selected multi-screen division, and if the multi-screen division is selected, implementing the divided screen so that the first image and the second image do not overlap with each other;

(c) after implementing the split screen, checking whether the adjustment of the aspect ratio is requested;

(d) outputting the split screen image when the adjustment of the aspect ratio is not requested as a result of the checking in step (c), and adjusting the aspect ratio of the split screen when the adjustment of the aspect ratio is requested .

According to another aspect of the present invention, there is provided a display control method for a dual computer,

(e) if the multi-screen division is not selected as a result of the checking in step (b), selecting the first image or the second image, and displaying and outputting the selected image, do.

In the step (d), when the user inputs a size adjustment signal of the screen, the aspect ratio of the computer connected to the input / output device changes according to the size adjustment signal.

According to the present invention, there is an advantage that screens of a dual personal computer (PC) can be simultaneously implemented on one monitor without overlapping each other.

In addition, according to the present invention, when a screen of a dual computer is simultaneously implemented on a single monitor in a screen division manner, there is an advantage that a screen ratio can be freely changed according to a user's selection.

In addition, according to the present invention, screen switching of an input / output device can be implemented in a dual computer using different networks.

1 is a schematic configuration diagram of a display control system of a dual computer to which the present invention is applied,
2 is a configuration diagram of a display control system of a dual computer according to the present invention,
Fig. 3 is a detailed configuration diagram of Fig. 2,
FIG. 4 is a block diagram of an embodiment of the image processing unit of FIG. 3,
5 is a flowchart illustrating a display control method of a dual computer according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

&Lt; Example 1 >

FIG. 1 is a schematic block diagram of a dual computer display control system to which the present invention is applied. An input device 100 such as a keyboard or a mouse for inputting an operation signal to a computer is connected to the computer selection device 200.

The computer selection device 200 connects the first computer 310 and the second computer 320 to the input device 100 according to a user's selection.

In addition, one monitor 400 is connected to the first computer 310 and the second computer 320. Here, the monitor 400 selects one of the first image and the second image output from the first computer 310 and the second computer 320 according to the selection of the user and displays the selected image on the screen, And the second image is divided into one screen and displayed simultaneously. Here, the first image is the output image of the first computer 310 and the second image is the output image of the second computer 320.

The monitor 400 can vary the aspect ratio of the divided screen according to the selection of the user.

The display control system of the dual computer to which the present invention configured as described above is applied first connects the input device 100 such as a keyboard and a mouse to the computer selection device 200 and the first computer 310 and the second computer 320, To the computer selection device (200). In addition, the output devices of the first computer 310 and the second computer 320 are connected to the monitor 400.

In this state, when the user selects a specific computer through the computer selection button provided separately, the computer selection device 200 connects the first computer 310 or the second computer 320 to the input device 100 do.

Thereafter, the specific computer selected according to the operation of the input device 100 operates, and the result is displayed on the monitor 400. At this time, the monitor 400 displays the output of the specific computer Only the image is displayed or the output image of the specific computer and the image of the unselected computer are displayed on the screen by the multi-screen division method (PBP).

In this case, the multi-screen division method basically divides the entire screen into halves, displays the output image of the first computer 310 on one divided surface, and outputs the output of the second computer 320 to the other divided screen The image is displayed.

At this time, the user can select an image to be displayed on the monitor 400 through the external input device, and when the image is implemented in the multi-screen division mode on the monitor 400, a screen ratio of a specific screen can be selected. By this selection, the monitor 400 simultaneously displays only one image on the entire screen or simultaneously displays images output from two different computers through screen division. In addition, when the screen is divided, the screen ratio of a specific screen is adjusted do.

Hereinafter, a specific operation of implementing a single image on a screen in the monitor 400, implementing a divided image by dividing the screen, and changing a screen ratio of a specific one of the divided images will be described.

FIG. 2 is a block diagram of a display control system for a dual computer according to the present invention. Referring to FIG. 2, the input device 100, the computer selection device 200, the first computer 310 and the second computer 320, .

As shown in FIG. 3, the computer selection device 300 includes an input for transmitting the input of the input device 100 to the first computer 310 or the second computer 320 according to a user's selection of a computer, And a control unit 210.

3, the first computer 310 includes a PC memory unit 311, a PC input unit 312, a PC control unit 313, and an image output unit 314, and the second computer 320, A PC input unit 322, a PC control unit 323, and a video output unit 324, as shown in FIG. Such a configuration is the same as that of a general computer, and the operation is the same as that of a general computer, so a detailed description of the computer will be omitted.

The monitor 400 includes an input and output device selection unit 410 for selecting the input device 100 and an output screen image and an input and output device selection unit 410 for inputting and receiving images output from the first and second computers 310 and 320, A first image input unit 421 and a second image input unit 422 for the first image input unit 421 and the second image input unit 422 and a multiplexer for selecting and outputting the first image and the second image output from the first image input unit 421 and the second image input unit 422, A monitor interface 430 for selecting an output screen image through the input / output device selection unit 410 and selecting and combining the first and second images corresponding to the selected screen image, And a screen display unit 450 for displaying an image on the LCD screen according to an image output from the monitor interface board 440.

The input / output device selection unit 410 includes a PC signal input unit 411 for generating an input / output device selection signal when operating a program installed for switching input / output devices; An OSD execution unit 412 for executing an OSD provided for function setting of the display unit and generating an input / output device selection signal; And a button input unit 413 for generating an input / output device selection signal when a button provided for switching the input / output device is operated.

3, the monitor interface board 440 includes a monitor input unit 441 for receiving an external signal including an input device selection signal, a configuration screen selection signal, and a screen non-variable signal; And a monitor control unit 443 for controlling the screen display of the first image and the second image output from the multiplexer 430 according to an external signal input through the monitor input unit 441. [ Here, the monitor control unit 443 preferably controls the overall operation of the screen display according to the screen processing control program stored in the monitor memory unit 442.

The monitor control unit 443 recognizes a screen to be changed on the divided screen when the user clicks a screen to be changed by the user with a mouse, and then, when the user inputs the size adjusting signal of the screen, And generates a control signal.

In addition, the monitor interface board 440 implements the input image in one screen according to the path selection signal and the screen ratio control signal generated by the monitor control unit 443, (445); An OSD processing unit 444 for performing OSD image processing; (LCD, touch screen, etc.) driving signal corresponding to the image to be displayed on the screen display unit 450. The LCD driver 446 generates a driving signal corresponding to the image to be displayed. Here, when the display device is a touch screen, the LCD driver 446 may be changed to a touch screen driver.

The image processing unit 445 includes a video path selection unit 445a for selecting a path of an input video according to a path selection signal of an image; An image processor 445b that implements an image transmitted through the image path selector 445a as one screen; A split screen processing unit 445c that implements the images transmitted through the image path selection unit 445a so as not to overlap each other on the divided screen; A screen non-varying unit 445d for varying a screen ratio of the divided screen processed by the divided screen processing unit 445c; And an image output unit 445e for outputting a screen image output through the image processing unit 445b or the screen non-variable unit 445d.

When the user selects a particular computer through the input / output device selection unit 410 to select a computer to be used among the dual computers, the display control system of the dual computer according to the present invention configured as described above controls the monitor interface board 440, And receives the computer selection signal from the monitor input unit 441 in the monitor control unit 443.

Here, a dual computer refers to two computers connected to different networks. For example, the first computer 310, which is a dual computer, may be connected to the Internet network, and the second computer 320 may be connected to the intra network.

The computer selection signal inputs a computer switching selection signal to the monitor interface board 440 when a shortcut key preset for switching the input / output device is pressed on the input device 100 or a button provided on the monitor 400 is pressed , The monitor control unit 443 of the monitor interface board 440 recognizes this and transmits an input device switching command to the computer selection device 200. Here, the input device switching command may use two different signals, such as a high signal (5V) and a low signal (0V), and any signal may be used as long as it can distinguish two or more signals in addition to these signals.

The input control unit 210 of the computer selection device 200 receiving the input device switching command inputs the input device 100 to the first computer 310 or the second computer 310 320). For convenience of explanation, it is assumed that the first computer 310 is selected in the following description.

When the first computer 310 is selected, the first computer 310 outputs an image to the monitor 400 according to a command operated by the user through the input device 100. At this time, the second computer 320 also assumes that the user has previously used the image, and outputs an image corresponding to the command operated by the user to the monitor 400.

For example, even when a specific computer is selected, the output images of the first computer 310 and the second computer 320, which form a dual computer, are simultaneously transmitted to the monitor 400.

The first image input unit 421 of the monitor 400 receives the first image output from the first computer 310 and the second image input unit 422 receives the first image output from the second computer 320, 2 image is input.

The first image and the second image input to the first image input unit 421 and the second image input unit 422 are input to the multiplexer 430 and the multiplexer 430 outputs the first image and the second image from the monitor interface board 440, The first image and the second image are selected according to the image selection signal, or only one of the two images is selected and output. Here, the multiplexer 430 is a device capable of selecting one of two inputs by using a normal selection signal as a control signal, or outputting two inputs to different paths through different paths as needed.

The monitor control unit 443 of the monitor interface board 440 receiving the image from the multiplexer 430 controls the screen configuration and the screen display based on the video display control program provided in the monitor memory unit 442.

For example, if the user selects only the first image or the second image, the monitor control unit 443 transmits only the first image or the second image to the image processing unit 445. Otherwise, if the user selects the multi-screen division method The first image and the second image are all selected and transmitted to the image processing unit 445. Then, the path selection signal of the image is transmitted to the image processing unit 445 according to the screen implementation mode selected by the user, that is, the single screen mode or the multi-screen mode.

In addition, in a state where an image is displayed on a screen in a multi-screen division mode, it is detected whether a user requests a screen aspect ratio change in real time, and a screen ratio control signal is provided to the image processing unit 445 in real- .

Here, when a user views an image on a screen in a multi-screen division mode, the user selects a specific screen using a mouse (places the indicator on the screen and clicks) You can input the aspect ratio adjustment signal by pressing the left / right movement button. Alternatively, a screen ratio adjustment button may be provided at any position of the monitor, and a screen ratio adjustment signal may be input by pressing a button for adjusting the aspect ratio. In addition to this method, it is also possible to use all known input methods for inputting the aspect ratio adjustment signal.

If the display device is a touch screen, it is possible to input a screen ratio adjustment signal by dragging a screen size to be varied while touching a specific screen.

The image path selection unit 445a of the image processing unit 445 selects and outputs the input image according to the path selection signal of the input image. At this time, when the screen implementation method is a single screen implementation method, The first image and the second image are selected and transmitted to the image processing unit 445b.

The image processing unit 445b implements the input image in one screen in a method of implementing a single image on the entire normal screen and transmits the same to the image output unit 445e. The image output unit 445e transmits the image And transmits it to the LCD driver 446.

Thus, only the first image or the second image is displayed on the entire screen on the screen of the monitor 400. [

In the case where the screen realization method is a multi-screen segmentation method, the image path selection unit 445a selects a first image and a second image according to the path selection signal, and delivers the first image and the second image to the split screen processing unit 445c.

The split screen processing unit 445c divides the transferred first and second images into a multi-screen division mode, implements a first image on one divided screen, and implements a second image on another divided screen . At this time, the multi-screen division method divides the entire screen into half and implements the image (refer to the monitor screen of FIG. 1).

The divided screen image thus implemented is transmitted to the screen non-varying unit 445d, and the screen non-varying unit 445d transmits the screen non- . Here, the screen ratio refers to the ratio of the size of the divided multi-screen. For example, if the initial multiple screen aspect ratio is 5: 5 and the screen size for the first image is adjusted to 7, the multi screen aspect ratio becomes 7: 3. At this time, the expansion of the screen can only display the image of the currently selected computer. This is because the cursor or the mouse pointer can be displayed and moved only on the image screen of the currently selected computer.

The screen aspect ratio variable method in the screen aspect ratio variable section 445d adjusts the aspect ratio in the same manner as the conventional method of reducing or enlarging the display screen in the computer, and thus a detailed description thereof will be omitted.

Here, if the screen of a specific screen is expanded, the other screen is reduced. At this time, by setting the maximum expansion width or the minimum reduction width, even if one screen is enlarged to the maximum, another screen exists in a part of the screen. If the maximum size of one screen occupies the entire screen, sometimes it may happen that the user mistakenly thinks whether the current screen mode is a single screen mode or a multi-screen mode.

The multi-screen video signal whose screen ratio is adjusted is input to the LCD driver 446 through the video output unit 445e, and then the multi-screen video with the screen ratio adjusted is displayed on the screen. In the multi-screen image displayed in this way, the screen ratio is adjusted in real time by the above-described screen ratio adjustment method according to the user's request during use.

For example, in the PBP mode in which two images are displayed without overlapping each other, the size of a screen for displaying an image output from a currently used computer is expanded or decreased according to a user's need, .

&Lt; Example 2 >

5 is a flowchart illustrating a method of controlling a display of a dual computer according to the present invention, wherein S is a step, and a display control process performed by the monitor control unit 443 of FIG. 3 in software is shown.

5, a method of controlling a display of a dual computer according to the present invention includes the steps of (a) receiving first and second images respectively output from a first computer 310 and a second computer 320, (S101); (b) confirming whether the user has selected the multi-screen division, and if the multi-screen division is selected, implementing the divided screen so that the first and second images do not overlap with each other (S102, S106); (c) a step (S107) of confirming whether the aspect ratio adjustment is requested after implementing the divided screen; (d) outputting the split screen image if the adjustment of the aspect ratio is not requested as a result of the checking in step (c), adjusting the aspect ratio of the split screen when the adjustment of the aspect ratio is requested, and then outputting , S108); (e) selecting the first image or the second image when the multi-screen division is not selected as a result of the checking in step (b), and implementing and outputting a screen with the selected image (steps S103 to S105) .

In the display control method of the dual computer according to the present invention as described above, in step S101, the monitor control unit 443 receives the first image and the second image.

In step S102, it is determined whether the screen display method is a single screen implementation method or a multi-screen division method (PBP). In this case, the determination of the screen implementation method can be easily made based on the external input signal since the user inputs the input through the external signal input. As a result of the determination, if the method is a single-screen realization method, the process proceeds to step S103 to select the first image or the second image. In step S104, a single screen is implemented using the selected image using the normal image processing method. In step S105, the single screen image implemented as described above is output. Therefore, the image of the single screen is displayed on the screen of the monitor 400.

On the other hand, if the user selects the multi-screen segmentation method as a result of the determination in step S102, the split screen is implemented by the first image and the second image input in step S106. Here, it is preferable to use a general PBP implementation method for displaying two images on a single monitor without overlapping.

After implementing the PBP image, the process proceeds to step S107 to check whether the user requests the adjustment of the aspect ratio. If the user does not request the adjustment of the aspect ratio, the image implemented in the PBP implementation method is displayed on the monitor screen .

On the other hand, if it is determined in step S107 that the user has requested the adjustment of the aspect ratio, the process goes to step S109 to adjust the aspect ratio of the multiple screen by the user's requested adjustment value, and then goes to step S108, And displays the adjusted multi-screen.

In this case, when the user inputs a size adjustment signal of the screen, the aspect ratio of the computer connected to the current input / output device is changed according to the size adjustment signal.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined in the appended claims and their equivalents. Of course, such modifications are within the scope of the claims.

100 ... Input device.
200 ... Computer selection device
310 ... The first computer
320 ... The second computer
400 ... monitor
410 ... The input /
430 ... Multiplexer
440 ... Monitor interface board
441 ... Monitor input
442 ... The monitor memory section
443 ... The monitor control section
445 ... The image processor
445a ... The image-
445b ... The image processor
445c ... The split-
445d ... The screen non-
445e ... The video output unit

Claims

A first computer and a second computer for implementing a dual computer;
A computer selection device for selectively connecting an input device for inputting operation signals to the first computer and the second computer to the first computer and the second computer;
According to the screen selection of the user, one of the first image and the second image outputted from the first computer and the second computer is selected and displayed on the screen, or the first image and the second image are divided into one screen A monitor for simultaneous display,
Wherein the monitor changes the aspect ratio of the divided screen according to the selection of the user.

The dual-computer display control system according to claim 1, wherein the monitor changes a screen ratio of a screen selected by the user among the divided screens.

The dual display control system of claim 1, wherein the monitor comprises an input / output device selector for selecting the input device and the output screen image.

[3] The apparatus of claim 3, wherein the input / output device selection unit comprises: a PC signal input unit for generating an input / output device selection signal when operating a program installed for switching the input / output device;
An OSD executing unit for executing an OSD provided for setting a function of the display unit and generating an input / output device selection signal;
And a button input unit for generating an input / output device selection signal when operating a button provided for switching the input / output device.

4. The apparatus of claim 3, wherein the monitor comprises: a first image input unit and a second image input unit for respectively receiving images output from the first computer and the second computer;
A multiplexer for selecting and outputting a first image and a second image output from the first image input unit and the second image input unit;
And a monitor interface board configured to select and display the first and second images corresponding to the selected screen when the output screen image is selected through the input / output device selection unit, Computer display control system.

The display device of claim 5, wherein the monitor interface board comprises: a monitor input unit for receiving an external signal including an input device selection signal, a configuration screen selection signal, and a screen non-variable signal;
And a monitor controller for controlling the screen display of the first image and the second image output from the multiplexer according to an external signal input through the monitor input unit.

The method of claim 6, wherein the monitor control unit recognizes a screen to be varied on a divided screen when a user clicks a screen to be changed by a mouse, and then, when the user inputs a size adjusting signal of the screen, And generates a screen ratio control signal.

The monitor interface board according to claim 5, wherein the monitor interface board further includes an image processor for implementing the input image in one screen according to a path selection signal and a screen ratio control signal generated by the monitor controller, The display control system comprising:

The image processing apparatus of claim 8, wherein the image processing unit comprises: an image path selection unit for selecting a path of an input image according to a path selection signal of an image;
An image processor for implementing an image transmitted through the image path selector in one screen;
A split screen processing unit which implements the images transmitted through the image path selection unit so as not to overlap each other on the divided screen;
A screen non-varying unit for changing a screen ratio of the divided screen processed by the divided screen processing unit;
And an image output unit for outputting a screen image output through the image processing unit or the screen non-variable unit.

(a) receiving a first image and a second image respectively output from the first computer and the second computer;
(b) checking whether the user has selected multi-screen division, and if the multi-screen division is selected, implementing the divided screen so that the first image and the second image do not overlap with each other;
(c) after implementing the split screen, checking whether the adjustment of the aspect ratio is requested;
(d) outputting the split screen image when the adjustment of the aspect ratio is not requested as a result of the checking in step (c), and adjusting the aspect ratio of the split screen when the adjustment of the aspect ratio is requested The display control method comprising:

The method of claim 10,
(e) if the multi-screen division is not selected as a result of the checking in step (b), selecting the first image or the second image, and displaying and outputting the selected image, A method of controlling a display of a dual computer.

[12] The method of claim 10, wherein the aspect ratio adjustment of the step (d) varies a screen ratio of a computer connected to the current input / output device corresponding to the size adjustment signal when the user inputs a size adjustment signal of the screen. / RTI >