KR20070002796A - Apparatus for providing data service using picture-in-picutre display - Google Patents

Abstract

A data service providing apparatus using a PIP(Picture In Picture) screen is provided to control broadcasting data and a data service to be outputted to a main screen and the PIP screen, respectively, by using a remote controller. A remote controller interface member(301) receives a main/PIP screen selection command, a screen replacement command and other commands and the like from a remote controller. A mode selection member(302) sets the output control mode of the image display device into a main screen control mode or a PIP screen control mode according to the main/PIP screen selection command. A set top interface member(303) performs the interface between the image display device and a set top box. A PIP processing member(304) displays the data signal received from the set top box on a PIP screen.

Description

TECHNICAL FIELD [0001] The present invention relates to a data service providing apparatus using a PIP screen,

FIG. 1 is a diagram illustrating a connection between an image display device, a set-top box, and a communication network according to the related art and the present invention.

2 is a diagram illustrating an embodiment of an image display and a remote controller for providing data service in an overlay manner according to the related art.

3 is a block diagram illustrating an internal configuration of an image display device providing data service using a PIP screen according to the present invention.

4 is a block diagram of an image display device and a remote controller for providing a data service according to an embodiment of the present invention.

5 is a block diagram illustrating an internal configuration of an output controller of an image display device for providing a data service using a PIP screen of a projection display according to an embodiment of the present invention.

6 is a block diagram showing an internal configuration of a remote controller according to an embodiment of the present invention.

FIG. 7 is a flowchart illustrating a process of controlling an output of an image display device providing a PIP function according to an exemplary embodiment of the present invention. Referring to FIG.

Description of the Related Art

301: remote control interface unit 302: mode setting unit

304: Set-top interface unit 304: PIP processor

501: remote control interface unit 502: mode setting unit

503: output control unit 504: screen switching unit

601: Screen selection command transmission unit 602: Screen replacement command transmission unit

The present invention relates to a method and an apparatus for controlling an output of an image display providing a picture in picture (PIP) function. More particularly, Mode, and transmits the signal received from the remote controller to the set-top box in a state in which the PIP screen and the main screen output from the video display are not replaced, And a control device for the image display device.

According to the related art, an image display device including a PIP (Picture in Picture) function among image display devices such as televisions outputs image data on a PIP screen together with a main screen. For example, a drama broadcasted on channel 11 is displayed on the main screen while a soccer game broadcasted on channel 9 is displayed on the PIP screen. Through this PIP function, users could view two broadcast data at the same time with one video display.

On the other hand, efforts have been made to provide data services to users by using image indicators such as televisions. FIG. 1 illustrates an example of such an effort. The video indicators 101 and 104 are directly connected to the Internet via an IP settop 102 or are connected to the Internet 103 through a bidirectional settop 105 Connected. When using the bi-directional set-top 105, the bi-directional set-top 105 is connected to the Internet 103 via the SO network 106. [ In this case, the data service provided to the user is mainly provided by a cable program provider 107. [

As shown in FIG. 2, the cable program provider 107 provides a data service to the sub screen 103 while outputting broadcast data to the main screen 102. The cable program provider 107 includes a main screen 102 and a sub screen 103 And transmits the generated broadcast data to the set-top box 105. The set-top box 105 outputs the received broadcast data to the video display 104. According to the related art, since the cable program provider 107 has to prepare the broadcast data for all combinations of the main screen and the sub screen, the preparation of the broadcast data is very burdensome.

In order to solve this problem, the cable program provider 107 prepares only broadcast data for the main screen and sends it to the set-top box 105. The data service is provided by a cable data provider 108 . In this case, the set-top box 105 combines the broadcast data received from the cable program provider 107 and the data received from the cable data provider in an overlay manner and outputs them to the video display 104. That is, the broadcast data received from the cable program provider 107 is displayed on the main screen, a screen for displaying the data received from the cable data provider on the sub screen is generated and displayed on the video display 104 . Of course, depending on the user's choice, the main screen and the sub-screen could be swapped.

As the data service, not only a one-way service such as a news service but also a simple type interactive service is provided. In the future, it is expected that a complicated interactive service such as a stock order and a chat service will be provided.

However, according to the related art, the user has to have a separate remote controller for controlling the data service. That is, a user has to input data for bidirectional data service. In this case, a remote controller for controlling the image display device and a separate remote controller should be provided. In addition, since the set-top box communicates with the remote controller in various ways, it is very difficult for a manufacturer of a television or the like to expect to manufacture the remote controller function of the various set-top boxes by including them in the remote controller of the television.

2 is a block diagram illustrating an image display apparatus and a remote controller according to the related art. Referring to FIG. 2, the image display 201 may implement a PIP function and output a main screen 202 and a PIP screen 203. Also, the remote controller 204 may be configured to include a screen change button 205.

When the user selects and inputs a screen change button, the remote controller 204 generates a replacement signal for the main screen 202 and the PIP screen 203 of the image display and transmits the signal to the image display device, And receives the replacement signal to replace the main screen 202 and the PIP screen 203. [ That is, the content displayed on the main screen 202 is displayed on the PIP screen 203, and the content displayed on the PIP screen 203 is displayed on the main screen 202. FIG.

In order to control the PIP screen 203 of the image display device using the remote controller 204 as described above, the user selects and inputs the replacement signal button 205 as described above to display the main screen 202 and the PIP screen 203, and then a control command is selectively inputted to control the PIP screen replaced with the main screen.

For example, a user may output a "Drama" program on the main screen 202 of the video output device 201 and output a "stock information" program on the PIP screen 203 of the video output device, If the user desires to make a predetermined control command for the "stock information" program output on the PIP screen 203 (for example, when he / she wants to place an order), the screen change button (205), and then input a command such as an order.

The video output device 201 replaces the " Drama "program on the main screen and the" stock information "program on the PIP screen in accordance with the selection input of the screen change button 205.

When the "stock information" program is displayed on the main screen, the user can input a command for the data service displayed on the main screen by using the control button of the remote controller, and after the control of the image display by the control button input By selecting and inputting the screen change button 205, the "Drama" program can be output again to the main screen.

Accordingly, in order to issue a control command for the "stock information" program outputted on the PIP screen by the user, it is necessary to replace the main screen and the PIP screen, There is.

Also, according to the related art, even if the main screen and the PIP screen are separately controlled, it is a simple function of changing the channel of the PIP screen or operating the video mode, which is inconvenient for the user to use. In this conventional technique, a button of a remote controller for controlling a main screen and a button of a remote controller for controlling a PIP screen are separately provided. That is, two channel selection buttons are provided for the main screen and the PIP screen. This increases the size of the entire remote controller, making it inconvenient for the user.

The channel change and video mode operation functions of the main screen and the PIP screen of the related art use a method of setting different frequencies of the main screen channel change signal and the PIP screen channel change signal transmitted from the remote controller to the video output device. For example, the main screen channel change signal uses a signal of a high frequency band, and the PIP screen channel change signal enables a channel change of a main screen and a PIP screen using a signal of a low frequency band.

However, even with this conventional technique, it is inconvenient that various control commands other than the channel change of the PIP screen of the video output device and the change to the video mode can not be transmitted or processed.

For example, when the multimedia broadcasting program output on the PIP screen is a home trading system (HTS) using an image display, etc., the user can input control commands such as character and numerical input using a remote controller while viewing the main screen However, according to the conventional video display and remote controller, it is not possible to input the various control commands to the PIP screen without replacing the program output to the PIP screen with the main screen, and thus the HTS can not be used properly have.

Accordingly, there is an increasing need for a technique capable of transmitting or processing various control commands related to the PIP screen without replacing the main screen and the PIP screen.

In the present invention, when a data service is provided using a video output device including a PIP capability, broadcasting data is output on a main screen, data service is provided on a PIP screen, And an object of the present invention is to provide an image display device and an output control device for an image display device which can transmit a message to a predetermined other party by inputting a message into a data service outputted on the PIP screen without replacing the screen and the PIP screen .

The present invention aims at simplifying the configuration of a video output device for providing a data service by allowing a set-top box to provide a data service using a PIP function provided by a video output device without providing a data service using an overlay function .

In addition, the present invention can input a command for a data service displayed on a PIP screen by using a remote controller for controlling a video display, and output broadcast data output on a main screen and a PIP screen To control all of the data services.

In the present invention, when a data service using a video output device including a PIP capability is used, a data service to be output to the PIP screen is displayed on the PIP screen in a state in which the user does not replace the main screen and the PIP screen, And an object of the present invention is to provide a remote controller for output control of an image display device capable of inputting a command.

According to an aspect of the present invention, there is provided an image display apparatus connected to a set-top box and providing a Picture in Picture (PIP) capability according to an embodiment of the present invention, A remote control interface unit for receiving a main / PIP screen selection command from the remote controller; (2) a mode for setting the output control mode of the video display device to the main screen control mode or the PIP screen control mode in accordance with the main / (3-1) when the output control mode of the video display device is the PIP screen control mode, the signal received from the remote controller through the signal remote control interface unit is transmitted to the settop box, (3-2 A set-top interface unit for receiving a data signal from the set-top box; and (4) a display unit for displaying a PIP screen on the data signal received from the set- And a PIP processing section.

The PIP screen control mode does not swap the main screen and the PIP screen output from the video display device.

According to another aspect of the present invention, there is provided an apparatus for controlling an output of an image display device, including: a remote controller interface unit receiving a screen selection command and a screen control command from a predetermined controller; A mode setting unit for setting an output control mode of the image display device to a main screen control mode or a PIP screen control mode in response to the screen selection command; And an output control unit for controlling the output of the selected screen by selecting one of a main screen or a PIP screen output from the video display in response to the screen control command in accordance with the output control mode.

Further, the remote controller for controlling the output of the image display according to another embodiment of the present invention transmits a screen selection command for setting the output control mode of the image display device to the main screen control mode or the PIP screen control mode to the image display device A screen selection command transmission unit; And a screen replacement command transmitter for transmitting a replacement command of the main screen and the PIP screen output from the video display controller to the video display device, wherein, when the output control mode is the PIP screen control mode, The control unit controls the output of the PIP screen among the main screen and the PIP screen output from the video display unit without replacing the main screen and the PIP screen in response to the command.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a method and an apparatus for controlling an output of an image display device providing a PIP according to the present invention will be described in detail with reference to the accompanying drawings.

3 is a block diagram illustrating an internal configuration of an image display device providing data service using a PIP screen according to the present invention.

The image display apparatus according to an exemplary embodiment of the present invention includes a remote controller interface unit 301, a mode setting unit 302, a set top interface unit 303, and a PIP processing unit 304.

The remote controller interface unit 301 receives a main / PIP screen selection command, a screen replacement command, and other commands from the remote controller. The main / PIP screen selection command is a command for selecting an output control mode regarding which of the main screen 401 and the PIP screen 402 the command from the remote controller is displayed on the video display 300 . The screen replacement command is a command to replace the main screen 401 and the PIP screen 402 displayed on the video display 300. [ That is, when the video display 300 receives the screen replacement command, the content displayed on the main screen 401 is displayed on the PIP screen 402, the content displayed on the PIP screen 402 is displayed on the main screen 401, . The main / PIP screen selection command sets the output control mode of the image display device to the main screen control mode or the PIP screen control mode, but does not replace the main screen 401 and the PIP screen 402. [

In the present invention, an image display device refers to an apparatus for receiving multimedia data and outputting the multimedia data, and includes a general TV, a digital TV, and an HDTV. The image display device can implement a PIP function and can output a main screen and a PIP screen to a predetermined output means. The main screen is a screen displayed by occupying most of the output means of the image display device, and the PIP screen is a screen displayed by occupying a part of the output means.

The mode setting unit 302 sets the output control mode of the video display device to the main screen control mode or the PIP screen control mode according to the main / PIP screen selection command. The mode setting unit 302 includes a predetermined storage device and stores the value of the output control mode in the storage device. The storage device may be an EEPROM or the like. According to one embodiment of the present invention, the remote controller 403 includes a control mode change button 404. When the user presses the control mode change button 404 while the current output control mode is the main screen control mode, the main / PIP screen selection command is transmitted from the remote controller 403 to the video display 300, The controller 302 changes the output control mode of the video display 300 to the PIP screen control mode. Similarly, when the user presses the control mode change button 404 while the current output control mode is the PIP screen control mode, the main / PIP screen selection command is transmitted from the remote controller 403 to the video display 300, The setting unit 302 changes the output control mode of the video display 300 to the main screen control mode. That is, the user can toggle the output control mode by clicking the control mode change button 404 of the remote controller 403. [

The set top interface 303 processes the interface between the video display 300 and the set top. When the output control mode of the video display unit 300 is the PIP screen control mode, the set top interface unit 303 transmits a signal received from the remote controller through the signal remote control interface unit to the set top box. For example, when the user inputs a predetermined command using the remote controller, if the current output control mode is the PIP screen control mode, the set top interface unit 303 delivers the command to the set top box. The set-top box then forwards the command to a data service provider (e.g., a cable data provider) that provides the corresponding data service over the SO network or the Internet network. For example, when the user inputs an order command for a predetermined stock, the set top interface unit 303 delivers the order command to the settop, and the settop delivers the order command to the predetermined data service provider.

The set-top interface unit 303 also receives a data signal from the set-top box. For example, the data service provider processes the order command and forwards the report to the settop. The settop transmits the report to the set-top interface unit 303 of the image processor 300.

The PIP processing unit 304 displays the data signal received from the set-top box on the PIP screen. By doing so, the user can use the broadcast service displayed on the main screen and simultaneously use the data service using the PIP screen. In particular, since the data service can be transmitted through the PIP screen and commands for the data service can be transmitted using the remote controller, the data service can be used without being disturbed by the use of the broadcast service displayed on the main screen . A device for providing a data service using a PIP screen has not been provided in the prior art, and a device capable of issuing a command to a data service on the PIP screen while leaving the PIP screen is not provided.

4 is a diagram illustrating an image display device and a remote controller according to an embodiment of the present invention.

 Referring to FIG. 4, the video display according to the present invention may implement a PIP function to provide broadcast data on the main screen 401 and provide data service through the PIP screen 402. The remote controller 403 according to the present invention includes a control mode change button 404.

For example, the user outputs (401) the "Drama" program to the main screen using the PIP function of the video display and uses the " When it is desired to transmit a predetermined command to the service, the remote controller 403 can be used to select and input the control mode change button 404.

The remote controller 403 transmits a PIP screen selection command to the video display, and the video display receives the PIP screen selection command and sets the output control mode to the PIP screen control mode.

The user can select and input a screen control command to control the output of the PIP screen. In the above example, when the "stock information" data service outputted on the PIP screen 402 is a home trading system (HTS) using an image display, etc., the user watches "Drama" program on the main screen 401, Quot; information service "data service through a character input, a numeral input, a direction movement, a predetermined list selection input, etc. on the PIP screen 402 by a screen control command.

According to another embodiment of the present invention, the control mode change button 404 may be composed of two buttons, a main screen selection button and a PIP screen selection button. In this case, the control mode change button is not clicked to toggle the current output control mode, but the current output control mode is set according to the button.

Since the user can use the HTS outputted on the PIP screen 402 in accordance with the screen control command, the user can observe the dramatic change situation simultaneously on the PIP screen 402 while watching the drama, and if necessary, Through the control command, you can view necessary data or conduct stock trading.

Therefore, according to the present invention, the user can directly control the output of the PIP screen without replacing the main screen with the PIP screen. Therefore, while watching the "drama" continuously as in the above example, The HTS can be easily used by controlling the output of the program.

That is, according to the present invention, it is possible to control the screen of the PIP screen without replacing the main screen and the PIP screen, and it is possible to utilize the PIP screen in various ways while the user is viewing and listening to the main screen.

In addition, since a command for a data service displayed on the PIP screen can be input using a remote controller for controlling the video display, broadcast data output on the main screen and data service Can be controlled.

5 is a block diagram showing the configuration of an output control apparatus for a projection display according to an embodiment of the present invention. 5, an output controller of an image display device according to an exemplary embodiment of the present invention includes a remote controller interface unit 501, a mode setting unit 502, an output control unit 503, and a screen change unit 504 Lt; / RTI > The output control device may be included in an image display device, or may be implemented separately from an image display device, or may be implemented in a set-top box.

The remote controller interface unit 501 receives a screen selection command and a screen control command from a predetermined controller. The screen selection command can be divided into a main screen selection command and a PIP screen selection command as described above.

In response to the screen selection command, the mode setting unit 502 sets the output control mode of the video display unit to the main screen control mode or the PIP screen control mode.

The main screen control mode is a mode for controlling the main screen in response to a screen control command received from the controller, and the PIP screen control mode is a mode for controlling the PIP screen in response to a screen control command received from the controller .

In response to the screen control command, the output controller 503 controls the output of the selected screen by selecting one of the main screen or the PIP screen output from the video display according to the output control mode.

And controlling the output of the main screen of the video display in response to the screen control command when the output control mode is the main screen control mode, and when the output control mode is the PIP screen control mode, Controls the output of the PIP screen of the indicator.

The screen replacement unit 504 replaces the main screen and the PIP screen when receiving a replacement command of the main screen and the PIP screen output from the video display controller from the controller. The screen replacement unit 504 replaces the PIP screen with the main screen output from an image display device (e.g., a television or the like) connected to an output device of the image display device of the present invention or an image display device having an output device of the image display device.

6 is a block diagram showing a configuration of a remote controller according to an embodiment of the present invention. Referring to FIG. 6, the remote controller according to one embodiment of the present invention may include a screen selection command transmission unit 601 and a screen replacement command transmission unit 602.

The screen selection command unit 601 transmits a screen selection command to the image display unit to set the output control mode of the image display unit to the main screen control mode or the PIP screen control mode.

The screen selection command can be divided into a main screen selection command or a PIP screen selection command, and an example of the configuration of the screen selection button for transmitting the screen selection command has been described with reference to FIG.

In addition, when the output control mode is the PIP screen control mode, the image display device does not replace the main screen and the sub screen in response to the screen control command, and does not replace the main screen and the PIP screen out of the PIP screen Can be controlled as described with reference to Fig.

The screen replacement command transmission unit 602 transmits a replacement command of the main screen and the PIP screen output from the video display unit to the video display unit.

Upon receiving the replacement command for the main screen and the PIP screen, the image display apparatus can replace the main screen and the PIP screen being output, and output the replacement image.

FIG. 7 is a flowchart illustrating a process of controlling an output of an image display device providing a PIP function according to an exemplary embodiment of the present invention. Referring to FIG. Referring to FIG. 7, the process of controlling the output of the image display according to an embodiment of the present invention is as follows.

In step S701, the video display according to the present invention receives a PIP screen selection command from a predetermined controller. The device for controlling the output of the image display device according to the present invention may be embedded in the image display device, or may be manufactured as a set-top box and connected to the image display device. Or may be installed externally or built-in to a set-top box connected to an image display.

In addition, the image display unit can operate in conjunction with a predetermined remote controller, and can receive a main screen selection command or a PIP screen selection command from the remote controller, and can perform an operation corresponding to each selection command.

The main screen selection command is an instruction to set the output control mode of the video display device to the main screen control mode, and the PIP screen selection command is to set the output control mode of the video display device to the PIP screen control mode.

And controls the output of the main screen in response to the control command received from the remote controller after the setting of the image display device in the main screen control mode. When the video display is set to the PIP screen control mode, the output of the PIP screen is controlled in response to the control command received from the remote controller after the setting.

The remote controller may include a screen selection button related to the output control of the image display, so that the user can select one of the main screen selection command or the PIP screen selection command by selecting and inputting the screen selection button.

According to an embodiment, the remote controller can be set such that a main screen selection command is input when the user selects the screen selection button once, and a PIP screen selection command is input when the selection is made once again.

In addition, the remote controller may implement the screen selection button in a toggle manner so that a main screen selection command or a PIP screen selection command may be inputted according to the number of times the user toggles the screen selection button.

The user can transmit the PIP screen selection command to the video display in the remote controller according to the above embodiment.

The video display unit may receive a PIP screen selection command transmitted from the remote controller. At this time, according to the embodiment, the image display unit can receive the PIP screen selection command using a predetermined set-top box.

In step S702, the image display device according to the present invention sets the output control mode of the image display device to the PIP screen control mode in response to the PIP screen selection command.

The output control mode of the video display determines whether to apply the control command input from the remote controller roll to the main screen or the PIP screen, and it can be configured as a main screen control mode and a PIP screen control mode .

And controls the output of the main screen in response to the control command received from the remote controller after the setting of the image display device in the main screen control mode. When the video display is set to the PIP screen control mode, the output of the PIP screen is controlled in response to the control command received from the remote controller after the setting.

At this time, the PIP screen control mode does not swap the main screen and the PIP screen outputted from the video display device.

In step S703, the image display according to the present invention receives a screen control command from the controller.

The screen control command is a command for controlling a screen output to the image processor, and may be a command for controlling at least one of volume, channel, number input, and character input.

When the video display is set to the PIP screen control mode, the PIP screen can be controlled according to the screen control command upon receipt of the screen control command from the video display.

In step S704, if the output control mode of the video display device is the PIP screen control mode, the video display device outputs the output of the PIP screen of the main screen and the PIP screen output from the video display device in response to the screen control command .

The screen control command is a command for controlling a screen output to the image processor, and may be a command for controlling at least one of a volume, a channel, a number input, and a character input. Therefore, the image processor receives a screen control command, Controls the volume, channel, number input, character input, etc. of the PIP screen in the PIP screen control mode.

Therefore, according to the present invention, the user can control the output of the PIP screen output from the image display device without replacing the main screen and the PIP screen.

The output control method of the image display according to the present invention may be implemented in the form of a program command which can be executed through various computer means and recorded in a computer readable medium. The computer-readable medium may include program instructions, data files, data structures, and the like, alone or in combination. The program instructions recorded on the medium may be those specially designed and constructed for the present invention or may be available to those skilled in the art of computer software. Examples of computer-readable media include magnetic media such as hard disks, floppy disks and magnetic tape; optical media such as CD-ROMs and DVDs; magnetic media such as floppy disks; Magneto-optical media, and hardware devices specifically configured to store and execute program instructions such as ROM, RAM, flash memory, and the like. The medium may be a transmission medium such as an optical or metal line, a wave guide, or the like, including a carrier wave for transmitting a signal designating a program command, a data structure, or the like. Examples of program instructions include machine language code such as those produced by a compiler, as well as high-level language code that can be executed by a computer using an interpreter or the like. The hardware devices described above may be configured to operate as one or more software modules to perform the operations of the present invention, and vice versa.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, Modification is possible. Accordingly, the spirit of the present invention should be understood only in accordance with the following claims, and all equivalents or equivalent variations thereof are included in the scope of the present invention.

According to the image display device and the output controller of the image display device of the present invention, when a data service is provided using a video output device including a PIP capability, broadcast data is output to the main screen, The user can input a message to the data service displayed on the PIP screen and transmit the message to a predetermined other party without replacing the main screen and the PIP screen displayed on the video display.

In addition, according to the present invention, a set-top box does not provide a data service using an overlay function but provides a data service using a PIP function provided by a video output unit, thereby simplifying the configuration of a video output unit for providing a data service can do.

In addition, according to the present invention, it is possible to input a command for a data service displayed on a PIP screen by using a remote controller for controlling a video display, so that broadcast data output on a main screen and a PIP screen You can control all the data services that are output.

According to the present invention, when a data service using a video output device including a PIP capability is used, data that is output to the PIP screen in a state where the user does not replace the main screen and the PIP screen output from the video display There is provided a remote controller for output control of an image display device capable of inputting a command to a service.

Claims (6)

A display device connected to a set top box and providing a PIP (Picture in Picture) capability, A remote control interface unit for receiving a main / PIP screen selection command from the remote controller; A mode setting unit for setting an output control mode of the image display device to a main screen control mode or a PIP screen control mode according to the main / PIP screen selection command; (1) transmitting the signal received from the remote controller through the signal remote control interface unit to the settop box when the output control mode of the video display is in the PIP screen control mode, (2) receiving a data signal from the settop box A set top interface unit; And A PIP processor for displaying the data signal received from the set- And an image display unit for displaying the image. The method according to claim 1, Wherein the PIP screen control mode does not swap the main screen and the PIP screen output from the video display device. An apparatus for controlling the output of an image display, A remote controller interface unit for receiving a screen selection command and a screen control command from a predetermined controller; A mode setting unit for setting an output control mode of the image display device to a main screen control mode or a PIP screen control mode in response to the screen selection command; And An output control unit for controlling the output of the selected screen by selecting one of a main screen or a PIP screen output from the video display in response to the screen control command in accordance with the output control mode, And an output control unit for controlling the output of the image display unit. The method of claim 3, Wherein the main screen control mode and the PIP screen control mode do not swap the main screen and the PIP screen output from the video display device. The method of claim 3, And a screen replacement unit for replacing the main screen and the PIP screen when receiving a replacement command of the main screen and the PIP screen output from the video display unit, And outputting the output signal to the display controller. A remote controller for controlling an output of an image display device, A screen selection command transmitter for transmitting a screen selection command to set the output control mode of the image display device to the main screen control mode or the PIP screen control mode to the image display device; And A screen replacement command transmitter for transmitting a replacement command of the main screen and the PIP screen output from the video display device to the video display device, Wherein the display controller controls the main display and the PIP screen in response to the screen control command, if the output control mode is the PIP screen control mode, without replacing the main screen and the PIP screen, Wherein the control unit controls the output of the PIP screen among the plurality of image display apparatuses.

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