KR20100058334A - Display apparatus, display system and control method thereof - Google Patents

Abstract

PURPOSE: A display device, a display system, and a control method thereof are provided to transform a source the of display device using an icon displayed on the display device. CONSTITUTION: A display device receives information about an external device or broadcast source corresponding to the selected icon from a host device(S203). The display device determines whether the information received from the external device or broadcast source is the source of the previous display device(S204). The external device or the broadcast source corresponding to the selected icon is converted into the source of the display device (S205).

Description

Display apparatus, display system and control method

The present invention relates to a display apparatus, a display system, and a method of controlling the display apparatus. More particularly, the present invention relates to a display apparatus for converting at least one of at least one external signal source into a source in a display apparatus connected to at least one external signal source. The present invention relates to a method of controlling by using an icon displayed in the present invention, a display apparatus and a display system to which the same is applied.

Various external signal sources may be connected to the display device. In addition, the user needs to set at least one of the external signal sources connected to the user's preference as the source of the display apparatus. For example, a display device such as a TV may be connected to various external devices such as a DVD player, a PC, a VCR in addition to a broadcast signal, and may receive and output various signals from the devices. Whenever the signal to be output from the TV is changed, the user must switch the source (the image source in the case of an image signal).

In order to set one of various external signal sources connected to the display device as a source of the display device, the user needs to display a menu screen of the display device using the remote controller. In general, the menu screen is implemented through an OSD (On Screen Display). Alternatively, a user may have a hot key on the remote control to switch the source with high user preference. In the case of switching the source through the menu screen, the user selects a desired source using up, down, left and right moving buttons and selection buttons, and when the process is completed, the source of the display apparatus is switched.

In this case, the user can change the source of the display device by using the menu button, the up / down or left / right navigation button to enter the image switching menu, the selection button to select the menu, the up / down or left / right navigation button to select the source. However, many steps must be taken to press the select button to switch between sources.

In addition, if a hot source is used as the hotkey of the remote control, the manufacturing process for making the hotkey will increase, and the manufacturing cost will increase. In addition, since the space occupied by the hotkey on the remote control must be secured, the remote control cannot have a simple structure.

The present invention has been made to solve the above problems, an object of the present invention is to control the switching of the source of the display device using the icon displayed on the display device, in order to easily switch the source of the display device and It is to provide an applied display device and display system.

According to an embodiment of the present invention for achieving the above object, a display device control method comprises the steps of: detecting information of at least one external signal source connected to the display device; Transmitting the detected result to a host device; Receiving an image signal including an icon corresponding to the information of the detected external signal source; and displaying the icon.

The method may further include designating an external signal source corresponding to the selected icon as a source of the display apparatus when at least one of the displayed icons is selected.

The method may further include receiving information about an external signal source corresponding to the selected icon from the host device.

In addition, when at least one of the displayed icons is selected, determining whether an external signal source corresponding to the selected icon is identical to a previous source; and when the result is not identical, an external signal corresponding to the selected icon. The method may further include designating a circle as a source of the display device.

The host device may be integrally formed with the display device.

The information on the external signal source may include the type of the external signal source, and the icon may be an image corresponding to the type of the detected external signal source.

In addition, the displaying of the received icon may be displayed as a sub-screen of the PIP type.

The host device may further include generating an icon corresponding to at least one external signal source connected to the display device based on the received information of the external signal source.

The method may further include receiving one of the displayed icons through an input device for controlling the sub screen.

The sub-screen may display an area where the icon is displayed and an area adjacent to the area where the icon is displayed.

The external signal source may include an external device connected to the display device.

In addition, the external signal source may include a broadcast signal source for providing a broadcast signal to the display device.

According to an embodiment of the present invention for achieving the above object, a display device to which an image signal can be input from an external signal source, the detection unit for detecting information of at least one external signal source connected to the display device; An interface unit for transmitting the detected external signal source information to a host device and receiving an image signal including an icon corresponding to the transmitted external signal source information from the host device; and displaying the received image signal. It includes a display unit.

In addition, when one of the displayed icons is selected, a control unit for controlling to designate an external signal source corresponding to the selected icon as a source of the display device.

The interface unit receives information of an external signal source corresponding to the selected icon from the host device, and the control unit selects the selected signal based on information of an external signal source corresponding to the selected icon received from the host device. An external signal source corresponding to an icon may be controlled to be designated as a source of the display device.

The controller may determine whether an external signal source corresponding to the selected icon matches a previous source, and if not, designate an external signal source corresponding to the selected icon as a source of the display apparatus. Can be controlled.

The host device may be located inside the display device.

The information on the external signal source may include the type of the external signal source, and the icon may be an image corresponding to the type of the detected external signal source.

The controller may control the video signal including the received icon to be displayed as a sub-screen of the PIP type.

In addition, the external signal source may include an external device connected to the display device.

The external signal source may include a broadcast signal source for providing a broadcast signal to the display device.

In a display system in which a host apparatus and a display apparatus are connected, the display apparatus includes: a detector configured to detect information of at least one external signal source connected to the display apparatus; A first interface unit which transmits the detected external signal source information to the host device and receives an image signal including an icon corresponding to the transmitted external signal source information from the host device; And a display unit configured to display the received video signal, wherein the host device receives information of the detected external signal source from the display device, and receives an image signal including an icon corresponding to the information of the transmitted external signal source. A second interface unit for transmitting; and

And a host device controller configured to generate an icon corresponding to at least one external signal source connected to the display device based on the information of the external signal source received from the display device.

The display apparatus may further include a display apparatus controller configured to control to designate an external signal source corresponding to the selected icon as a source of the display apparatus when one of the displayed icons is selected.

The display device controller may control the video signal including the icon received from the host device to be displayed on a sub screen of a PIP type, and the host device receives selection of one of the icons displayed on the sub screen. The apparatus may further include an input unit for controlling the second interface unit to transmit the information of the external signal source corresponding to the selected icon to the display apparatus.

The display apparatus controller may control to display an area where the icon is displayed and an adjacent area between the area where the icon is displayed as the sub screen of the PIP type.

It is possible to provide a method for controlling the switching of the source of the display device by using the icon displayed on the display device, and the display device and the display system to which the display device is applied, thereby easily switching the source of the display device.

Hereinafter, with reference to the drawings will be described the present invention in more detail.

1 is a view showing a schematic configuration of a display system according to an embodiment of the present invention. As shown in FIG. 1, the display system includes a display apparatus 100, a host apparatus 200, an external device 300, and a broadcast signal source 400. The host device 200 may include a device capable of displaying an icon on the PC or the display device 100. In addition, the external device 300 may include a plurality of devices as well as one device. For example, it may include various types of devices capable of displaying a video signal on the display device 100, such as a DVD player, VCR, PC, STB. The broadcast signal source 400 may include all signal sources for providing a broadcast signal to the display apparatus 100, and may be one or two or more.

2 is a diagram illustrating a detailed structure of a display apparatus according to an embodiment of the present invention.

As shown in FIG. 2, the display apparatus 100 includes an interface unit 101, a detector 102, and a display 103. Here, the display device 100 may be a TV, a monitor, an electronic picture frame, or the like.

The interface unit 101 is connected to the host device 200 to receive an image signal and a command input from the host device 200, thereby allowing the display device 100 to control the display unit 103. The interface unit 101 may include a D-SUB, DVI, USB, HDMI, Display Port, and the like.

The detector 102 detects information on at least one external device 300 or at least one broadcast signal source 400 connected to the display apparatus 100. There may be one external device 300 or two or more external devices. As an example, the external device 300 may include a DVD player, a VCR, a computer, an STB, and the like. The external device 300 and the host device 200 may be one PC or two or more PCs. In addition, the type of video signal input from the external device 300 may include s-video, component, composite, HDMI, and the like. In addition, one or more broadcast signal sources 400 may be provided.

The display unit 103 displays an image signal received from the host device 200, at least one external device 300, or at least one broadcast signal source 400. The display unit 103 may include an LCD, a PDP, a CRT, an OLED, and the like.

The interface unit 101 transmits information on at least one external device 300 or at least one broadcast signal source 400 connected to the display apparatus 100 detected through the detector 102 to the host device 200. do. Specifically, the information may be the type, number, etc. of the external device 300 or the broadcast signal source 400 connected to the display apparatus 100. In addition, the transmission of the information may be performed when the display apparatus 100 is connected to the host apparatus 200. In addition, the external device 300 or the broadcast signal source 400 connected to the display apparatus 100 may be changed.

The host device 200 generates an icon corresponding to the connected external device 300 or the broadcast signal source 400 based on the received information, and displays the image signal including the icon through the interface unit 101 through the display device 100. To send). The display unit 103 displays an image signal including the received icon. The icon in the present specification may be an image icon representing a corresponding source, but is not limited thereto, and may be implemented as simple text indicating a corresponding source.

3 is a diagram illustrating a detailed structure of a display apparatus according to an embodiment of the present invention.

As shown in FIG. 3, the display apparatus 100 may further include a controller 104. The controller 104 may control the entire display apparatus 100 by receiving a command input from the host apparatus 200 at the interface unit 101, and control the host apparatus 200, the external apparatus 300, and the broadcast signal source ( The display unit 103 may control the display unit 103 to display an image signal input from 400. In addition, the at least one external device 300 or at least one broadcast signal source 400 detected through the detection unit 102 may be generated and transmitted to the host device 200 through the interface unit 101.

In addition, when at least one of the icons displayed on the display 103 is selected, the controller 104 may designate the external device 300 or the broadcast signal source 400 corresponding to the selected icon as a source of the display apparatus 100. have. In detail, the user may directly select an icon for a desired source from among the displayed icons through an input means (not shown) provided in the display apparatus 100. Examples of the input means may be a keyboard, a mouse, buttons provided on the main body, a remote controller, a pointer, and the like. This will be described later in the section below. The controller 104 switches to a mode in which a user receives a signal from a source corresponding to the selected icon and outputs the signal. The controller 104 may be configured with the detector 102 and one block.

In addition, the controller 104 may determine whether the external device 300 or the broadcast signal source 400 corresponding to the selected icon matches the source of the previous display apparatus 100, and if not, the selected icon The external device 300 or the broadcast signal source 400 corresponding to the control unit may be controlled to be designated as a source of the display apparatus 100. In addition, the display 103 may control the icon received from the host device 200 to be displayed.

4 is a diagram illustrating a detailed structure of a display apparatus according to an embodiment of the present invention.

As shown in FIG. 4, the host device 200 may be located inside the display device 100. The host device 200 generates an icon corresponding to at least one external device 300 or at least one broadcast signal source 400 connected to the display device 100. The controller 104 may control the display unit 103 to display a video signal including an icon as a sub picture in the form of a picture in picture (PIP).

In the above embodiments, when the host device 200 is a PC, the display device 100 processes a signal received from a PC mode displaying a PC screen, a broadcasting mode displaying a broadcast screen, or an external device. It can operate in an external input mode for displaying a screen. When operating in the PC mode, the host device 200 may configure and process the screen in a form including the icon area. On the other hand, when operating in the broadcast mode or the external input mode, the icon area provided by the host device 200 may be processed as a PIP and displayed on one side of the screen.

In addition, the area for displaying the icon may be always displayed on one side of the screen, but is not normally displayed, but may be displayed when the user moves the mouse to a nearby screen, or may be implemented in a form that appears every specific period.

5 is a diagram illustrating a detailed structure of a display system according to an exemplary embodiment.

As illustrated in FIG. 5, the display apparatus 100 may include a first interface 105, a detector 106, a display 107, and a display apparatus controller 108. In addition, the host device 200 may include a second interface unit 201, a host device controller 202, and an input unit 203.

The first interface unit 105 is connected to the host device 200 to receive an image signal and a command input from the host device 200. The display apparatus controller 108 controls the display unit 107 to output an image signal according to the received command.

In addition, the first interface unit 105 may provide information about at least one external device 300 or at least one broadcast signal source 400 connected to the display apparatus 100 detected through the detector 106. To send). And at least one selected video signal including an icon corresponding to at least one external device 300 or at least one broadcast signal source 400 connected to the display device 100 received from the host device 200. Information corresponding to the external device 300 or the broadcast signal source 400 corresponding to the icon is received.

The detector 106 detects information about the external device 300 and the broadcast signal source 400 connected to the display apparatus 100. The external device 300 may be one, two or more, and may include a DVD player, a VCR, a computer, an STB, and the like. The external device 300 and the host device 200 may be one PC or two or more PCs. In addition, the type of video signal input from the external device 300 may include s-video, component, composite, HDMI, and the like. One or more broadcast signal sources 400 may be provided.

The display unit 107 displays an image signal received from the host device 200, at least one external device 300, or at least one broadcast signal source 400. In addition, the display unit 107 may include an LCD, a PDP, a CRT, an OLED, and the like. The video signal transmitted from the host device 200 through the first interface 105 corresponds to at least one external device 300 or at least one broadcast signal source 400 connected to the display device 100. A video signal including an icon is displayed.

The display apparatus controller 108 may control the entire display apparatus 100 by receiving a command input from the host apparatus 200 at the first interface unit 105, the host apparatus 200, and at least one external device. The display unit 107 may control the display unit 107 to display an image signal input from the at least one broadcast signal source 400. Also, information about the external device 300 and the broadcast signal source 400 detected by the detector 106 may be generated and transmitted to the host device 200 through the first interface 105.

In addition, when at least one of the icons displayed on the display unit 107 is selected, the display device controller 108 uses the external device 300 or the broadcast signal source 400 corresponding to the selected icon as a source of the display device 100. Can be specified. The display apparatus controller 108 may be configured as a block with the detector 106.

In addition, the display apparatus controller 108 may determine whether the external device 300 or the broadcast signal source 400 corresponding to the selected icon matches the source of the previous display apparatus 100. The external device 300 or the broadcast signal source 400 corresponding to the selected icon may be controlled to be designated as the source of the display apparatus 100. In addition, the display unit 107 may control to display an image signal including an icon received from the host device 200. When the display unit 107 displays an image signal including an icon, the display unit 107 may display a sub-picture in the form of a PIP.

The second interface unit 201 may receive information about at least one external device 300 or at least one broadcast signal source 400 detected by the display apparatus 100. In addition, an image signal including an icon corresponding to the external device 300 or the broadcast signal source 400 generated by the host device 200 may be transmitted to the display apparatus 100. In addition, information on the external device 300 or the broadcast signal source 400 corresponding to the selected icon among the displayed icons may be transmitted.

The host device controller 202 may be configured to display each external device 300 or each broadcast based on the detected at least one external device 300 or at least one broadcast signal source 400 received from the display apparatus 100. An icon corresponding to the signal source 400 may be formed. In addition, the display unit 107 generates information on at least one external device 300 or at least one broadcast signal source selected from among the icons displayed on the display unit 107. The generated information is controlled to be transmitted through the second interface unit 201.

The input unit 203 allows the display unit 107 of the display apparatus 100 to select at least one of the icons displayed on the sub screen of the PIP type. The input unit 203 may include a pointing device such as a mouse, a laser pointer, or the like. In addition, the input unit 203 may include any device that allows a user to directly select an icon.

6 is a diagram illustrating a process of displaying an icon corresponding to at least one external device or at least one broadcast signal source in a display device according to an embodiment of the present invention.

As shown in FIG. 6, the display apparatus 100 detects information on at least one external device 300 or at least one broadcast signal source 400 connected to the display apparatus (S101). In addition, the detected result is transmitted to the host device 200 (S102), and includes an icon corresponding to at least one external device 300 or at least one broadcast signal source 400 detected from the host device 200. The video signal is received (S103). The video signal including the icon received from the host device 200 is displayed (S104).

FIG. 7 illustrates a process of switching a source of a display apparatus through an icon displayed in the display apparatus according to an embodiment of the present invention.

As shown in FIG. 7, when the display apparatus 100 displays an image signal including an icon received from the host apparatus 200 (S201), it is detected whether at least one of the icons displayed by the user is selected. (S202). When at least one of the displayed icons is selected (S202-Y), information about the external device 300 or the broadcast signal source 400 corresponding to the selected icon is transmitted from the host device 200 (S203). When receiving the information on the external device 300 or the broadcast signal source 400 from the host device (200) (S203), it is determined whether or not match the source of the previous display device (S204). If it is determined that they do not match (S204-N), the external device 300 or the broadcast signal source 400 corresponding to the selected icon is switched to the source of the display apparatus 100 (S205).

FIG. 8 illustrates a process of displaying an icon corresponding to at least one external device or at least one broadcast signal source in a display system according to an embodiment of the present invention, and switching a source of the display apparatus through the icon; FIG. Drawing.

As shown in FIG. 8, the display apparatus 100 detects information on at least one external device 300 or at least one broadcast signal source 400 connected to the display apparatus 100 (S401). The information is transmitted to the host device 200 (S402).

The host device 200 is based on the information on at least one external device 300 or at least one broadcast signal source 400 received from the display device 100, each external device 300 or each broadcast signal source ( An icon corresponding to 400 is generated (S301). In operation S302, an image signal including the generated icon is transmitted to the display apparatus 100.

The display apparatus 100 displays the video signal received from the host apparatus 200 as a sub picture of PIP type (S403).

When at least one of the displayed icons is selected (S303), the host device 200 transmits information about the external device 300 or the broadcast signal source 400 corresponding to the selected icon to the display device 100 (S304). ).

The display apparatus 100 checks whether the information about the external device 300 or the broadcast signal source 400 received from the host apparatus 200 matches the source of the previous display apparatus 100 (S404). If it is determined that they do not match, the external device 300 or the broadcast signal source 400 corresponding to the information received from the host device 200 is switched to the source.

9 is a diagram illustrating a screen displaying an icon corresponding to at least one external device or at least one broadcast signal source in a display device according to an embodiment of the present invention.

As shown in FIG. 9, an image including an icon corresponding to at least one external device 300 or at least one broadcast signal source 400 connected to the display apparatus 100 on a portion of a screen of the display apparatus 100. The signal can be displayed.

In this case, both the external device 300 that can be connected and the icon corresponding to the broadcast signal source 400 are displayed, and the icon corresponding to the connected external device 300 or the broadcast signal source 400 is not connected to the external device. The display may be distinguished from the 300 or the broadcast signal source 400.

For example, the connected external device 300 or broadcast signal source 400 may be displayed in color, and the connected external device 300 or broadcast signal source 400 may be displayed in black and white. In addition, the connected external device 300 or the broadcast signal source 400 may be displayed in a dark color, and the external device 300 or the broadcast signal source 400 that is not connected may be displayed in a light color.

In addition, although the shape of the icon is disclosed in a circle in FIG. 9, the shape of the icon may be displayed in various shapes. The shape of the two-dimensional top view shape is possible, the shape of the three-dimensional solid figure is also possible, and the icon may rotate or move up, down, left and right. And the shape, rotation, and movement direction of the icon can be set by the user.

In addition, in FIG. 9, the icon is displayed at the lower right end, but may be displayed at the upper right end, the lower left end, the upper left end, the center, and the like. The display position of the icon may be set by the user.

FIG. 10 illustrates a screen on which a display device displays an icon corresponding to at least one external device or at least one broadcast signal source by displaying only a part of a sub picture in a PIP form according to an embodiment of the present invention.

As shown in FIG. 10, an image signal including an icon may be displayed as a sub-screen of a PIP type. The aspect ratio of the sub-screen may be a ratio of horizontal to vertical of 16 to 9 or 4 to 3. In addition, only a part of the sub-screen may be displayed on the display apparatus 100.

FIG. 11 is a diagram illustrating a screen displaying an icon corresponding to at least one external device or at least one broadcast signal source by reducing and displaying a PIP type sub-screen in a display device according to an embodiment of the present invention.

As shown in FIG. 11, when a video signal including an icon is displayed as a sub-picture in the form of a PIP, the aspect ratio of the icon is displayed in the size of the screen while maintaining the aspect ratio of 16 to 9 or 4 to 3. It may be possible to display only the displayed area and its adjacent area.

In addition, although the preferred embodiment of the present invention has been shown and described above, the present invention is not limited to the specific embodiments described above, but the technical field to which the invention belongs without departing from the spirit of the invention claimed in the claims. Of course, various modifications can be made by those skilled in the art, and these modifications should not be individually understood from the technical spirit or the prospect of the present invention.

1 illustrates a schematic configuration of a display system according to an embodiment of the present invention;

2 is a view showing a detailed structure of a display apparatus according to an embodiment of the present invention;

3 is a view showing a detailed structure of a display apparatus according to an embodiment of the present invention;

4 is a view showing a detailed structure of a display apparatus according to an embodiment of the present invention;

5 illustrates a detailed structure of a display system according to an exemplary embodiment of the present invention;

6 illustrates a process of displaying an icon corresponding to at least one external device or at least one broadcast signal source in a display device according to an embodiment of the present invention;

FIG. 7 is a diagram illustrating a process of switching a source of a display device through an icon displayed in the display device according to an embodiment of the present invention; FIG.

FIG. 8 illustrates a process of displaying an icon corresponding to at least one external device or at least one broadcast signal source in a display system according to an embodiment of the present invention, and switching a source of the display apparatus through the icon; FIG. drawing,

9 is a diagram illustrating a screen displaying an icon corresponding to at least one external device or at least one broadcast signal source in a display device according to an embodiment of the present invention;

FIG. 10 illustrates a screen on which a display device displays an icon corresponding to at least one external device or at least one broadcast signal source by partially displaying a PIP type sub-screen in a display device according to an embodiment of the present invention;

FIG. 11 is a diagram illustrating a screen displaying an icon corresponding to at least one external device or at least one broadcast signal source by reducing and displaying a PIP type sub-screen in a display device according to an embodiment of the present invention.

Claims (25)

Detecting information of at least one external signal source connected to the display device; Transmitting the detected result to a host device; Receiving an image signal including an icon corresponding to information of the detected external signal source; and And displaying the icon. The method of claim 1, If at least one of the displayed icons is selected, designating an external signal source corresponding to the selected icon as a source of the display device. The method of claim 2, And receiving information about an external signal source corresponding to the selected icon from the host device. The method of claim 1, Determining whether an external signal source corresponding to the selected icon matches a previous source when at least one of the displayed icons is selected; And, And specifying an external signal source corresponding to the selected icon as a source of the display device when the determination result does not match. The method of claim 1, And the host device is formed integrally with the display device. The method of claim 1, The information on the external signal source includes a type of the external signal source, And the icon is an image corresponding to the detected type of external signal source. The method of claim 1, And displaying the received icon on a sub screen of a PIP type. The method of claim 1, And generating, by the host device, an icon corresponding to at least one external signal source connected to the display device, based on the received information of the external signal source. The method of claim 7, wherein And selecting one of the displayed icons through an input device capable of controlling the sub-screen. The method of claim 7, wherein And the sub-screen displays an area where the icon is displayed and an area adjacent to the area where the icon is displayed. The method according to any one of claims 1 to 10, And the external signal source comprises an external device connected to the display device. The method according to any one of claims 1 to 10, And the external signal source comprises a broadcast signal source for providing a broadcast signal to the display device. In the display device that can be input video signal from an external signal source, A detector detecting information of at least one external signal source connected to the display device; An interface unit for transmitting the detected external signal source information to a host device and receiving an image signal including an icon corresponding to the transmitted external signal source information from the host device; And a display unit for displaying the received video signal. The method of claim 13, And a control unit for controlling to designate an external signal source corresponding to the selected icon as a source of the display apparatus when one of the displayed icons is selected. The method of claim 14, The interface unit receives the information of the external signal source corresponding to the selected icon from the host device, And the control unit controls to designate an external signal source corresponding to the selected icon as a source of the display device based on information of an external signal source corresponding to the selected icon received from the host device. The method of claim 14, The controller determines whether an external signal source corresponding to the selected icon matches a previous source, and if not, controls to designate an external signal source corresponding to the selected icon as a source of the display apparatus. Display device. The method of claim 13, And the host device is located inside the display device. The method of claim 13, The information on the external signal source includes a type of the external signal source, The icon is a display device, characterized in that the image corresponding to the type of the detected external signal source. The method of claim 14, And the controller controls the video signal including the received icon to be displayed on a sub-screen of a PIP type. The method according to any one of claims 13 to 19, And the external signal source comprises an external device connected to the display device. The method according to any one of claims 13 to 19, The external signal source comprises a broadcast signal source for providing a broadcast signal to the display device. In the display system is connected to the host device and the display device, The display device, A detector detecting information of at least one external signal source connected to the display device; A first interface unit for transmitting the detected external signal source information to the host device and receiving an image signal including an icon corresponding to the transmitted external signal source information from the host device; A display unit for displaying the received video signal, The host device, A second interface unit receiving information of the detected external signal source from the display device and transmitting an image signal including an icon corresponding to the information of the transmitted external signal source; and And a host device controller configured to generate an icon corresponding to at least one external signal source connected to the display device based on the information of the external signal source received from the display device. The method of claim 22, The display device, And a display device controller for controlling to designate an external signal source corresponding to the selected icon as a source of the display device when one of the displayed icons is selected. 24. The method of claim 23, The display device controller may be configured to control an image signal including an icon received from the host device to be displayed as a sub-picture of a PIP type. The host device, Further comprising an input unit for receiving one of the icons displayed on the sub-screen, And the host device controller controls the second interface unit to transmit the information of the external signal source corresponding to the selected icon to the display device. The method of claim 24, And the display apparatus controller controls to display an area where the icon is displayed and an adjacent area between the area where the icon is displayed as the sub-screen of the PIP type.

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