KR20070022892A - Display device having a function of image zoom using a picture in picture and it's method - Google Patents

Abstract

1. TECHNICAL FIELD OF THE INVENTION

The present invention relates to an image display device.

2. The technical problem to be solved by the invention

According to the present invention, when the user performs a zoom function of the video display device to enlarge a specific area of the video when the user watches a video using the video display device, the first display area and the second display area using the PIP function are used. By displaying the enlarged video of the specific area and the entire video of the video at the same time, you can continue to watch the rest of the video due to the enlargement, and if you want to enlarge the other specific area of the video, you can freely position the window indicating the specific area By moving, the user can check only the desired part more clearly, and the purpose is to improve the convenience of saving and editing the image data of the still image and video desired by the user.

3. Summary of the Solution of the Invention

According to an aspect of the present invention, there is provided an image display apparatus supporting a PIP function, comprising: a key input unit having a plurality of keys, an image processing unit for processing an input signal, and an image signal from the image processing unit; When the IP function is selected, the entire display area is divided into a first display area and a second display area, the entire video signal is displayed on the first display area, and a window of the entire video signals is displayed on the second display area by a window. And an IP image processor configured to display the partial image signal of the selected specific area.

4. Important uses of the invention

The present invention is used in the zoom function of the image display device.

 Video, Zoom, IP, Video Display

Description

Image display apparatus having zoom function using PIP and its method {DISPLAY DEVICE HAVING A FUNCTION OF IMAGE ZOOM USING A PICTURE IN PICTURE AND IT'S METHOD}

1A and 1B are exemplary views illustrating a screen in which an image is enlarged by executing a zoom function in a conventional television.

2 is a configuration diagram of an image display apparatus having a zoom function using a PIP according to the present invention.

3A through 3E are screen views illustrating a process of performing a PI zoom function according to an exemplary embodiment of the present invention.

FIG. 4 is a diagram illustrating the configuration of a remote controller in an image display device having an image enlargement function using a PIP according to the present invention; FIG.

5 is an exemplary diagram illustrating an enlargement ratio of a window according to the present invention.

6 is an operation flowchart showing an image magnification method using IP in the image display device according to the present invention.

7A and 7B are exemplary diagrams illustrating an execution screen of an IP zoom function of an image display device having an image enlargement function using an IP according to the present invention.

The present invention relates to an image display apparatus, and more particularly, to an image display apparatus having a zoom function using a PIP and a method thereof.

In recent years, as the technology of a video display device such as a television is changed from an analog method to a digital method, related technologies are rapidly developing quantitatively and qualitatively.

In particular, in terms of quantity, television will be exponentially increased in number of channels broadcast by a digital method capable of operating more channels than analog.

Such digital televisions have the advantage that they can easily implement various functions that were possible only through computer monitors. Among them, the zoom function, which can enlarge and view only the desired part, is implemented as one of the special additional functions in the commercially available analog television. In this case, the zoom function of the analog television consists of enlarging the output image by adjusting horizontal and vertical deflection of the electron beam emitted from the CRT electron gun.

In addition, televisions have been slimmed down to meet the user's needs, making them slim and large screens to give the impression of being on the spot, and simultaneously outputting multiple signal inputs including PCs in addition to the original broadcast signal. to be.

In response to this trend, one method of satisfying user's needs is a PIP (Picture In Picture) function.

In general, the PIP function displays a sub-picture in which the video signal is compressed horizontally and vertically on the main picture. At this time, a picture of the same channel is displayed on the sub picture and the main picture. Or display images of other channels.

1A and 1B are exemplary views illustrating a screen in which an image is enlarged by executing a zoom function in a conventional television.

When a user wants to enlarge and watch a specific area 101 of a video when viewing a video shown in FIG. 1A through a television having a conventional zoom function, the user may select a predetermined device provided in the input device and the remote control provided in the television. The specific area 101 is selected by using the up, down, left and right buttons, and the zoom function button is input in a predetermined manner to execute the zoom function.

When the zoom function of the image display apparatus is executed as shown in FIG. 1B, the specific region 101 selected by the user is enlarged and displayed on the entire screen of the image display apparatus.

However, in the case where the user-selected specific area 101 is enlarged and displayed on the entire screen, the image of the remaining portion due to the enlargement is not displayed on the screen, so that the image of the remaining portion cannot be viewed. There is a problem of missing the situation.

In addition, when the user wants to enlarge and check another specific region 101 of the video, the user returns to the full screen of the video and selects another specific region 101, and executes the zoom function again to enlarge and display the entire screen. It must be done repeatedly.

Repeatedly performing the above operations in order to enlarge the specific region 101 desired by the user also causes a considerable inconvenience when capturing still images and videos desired by the user.

The present invention has been invented to solve the above problems, and when the user watches a video using the video display device, when the user executes the zoom function of the video display device to enlarge a specific area of the video, To provide an image display apparatus and method that can continuously display the magnified image of the specific region and the entire image of the video on the screen through the first display region and the second display region using the function at the same time to continue watching The purpose is.

In addition, when the user wants to enlarge another specific area of the video, the user can freely move the position of the window representing the specific area so that the user can clearly see only the desired part. Another purpose is to improve convenience.

According to an aspect of the present invention, there is provided an image display apparatus supporting a PIP function, comprising: a key input unit having a plurality of keys, an image processing unit for processing an input signal with an image signal, and an image from the image processing unit; When the signal is input and the PIP function is selected, the entire display area is divided into a first display area and a second display area, an entire video signal is displayed on the first display area, and the second display area is displayed on the second display area. And a PIP image processor configured to display a partial image signal of a specific region selected by the window among all the image signals.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In addition, in describing the present invention, when it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

The present invention relates to an image display device having a zoom function using a PIP. In an embodiment of the present invention, when a user executes a PIP zoom function while watching a video with an image display device, the entire display area is first displayed. Divided into an area and a second display area, and displaying the entire video signal of the video in the first display area, and displaying a partial video signal of the specific area selected by the window among the entire video signals of the video in the second display area. As described.

However, it will be apparent to those skilled in the art that an image of a specific region selected by a window among all image signals of a moving image may be displayed on the first display area, and an entire image signal of the moving image may be displayed on the second display area.

FIG. 2 is a diagram illustrating a configuration of an image display apparatus having a zoom function using a PIP according to the present invention.

Referring to FIG. 2, a key input unit 210 for inputting a key for selecting or manipulating a function supported by an image display device, an RF tuner 201 for tuning a digital or analog broadcast signal through an antenna, and an external input medium. The image processing unit 203 and the image processing unit for processing the input signal received through the external input receiving unit 202, the RF tuner 201 or the external input receiving unit 202 to receive the image content as an image signal. The video signal is received from the video signal 203, and the video signal is separated into the entire video signal and the partial video signal to be enlarged under the control of the controller 209, and the first display area scaler 205 and the second display area scaler 206 are controlled. The first display area scale for scaling the entire image signal inputted from the screen selector 204 and the size of the first display area to be transmitted to the screen selector 204 for transmission. Second display area scaler 206, first and second display area scalers 205 for scaling the partial image signal input from the screen selection unit 204 to match the size of the second display area. An image synthesizing unit 207 for synthesizing the entire image signal and the partial image signal inputted from 206 and outputting one image signal, a display unit 208 for displaying the image signal transferred from the image synthesizing unit 207, And a controller 209 for controlling the IP zoom operation of the image display apparatus according to the input of the key input unit 210.

The operation of the video display device configured as described above is as follows.

First, the key input unit 210 includes a plurality of operation keys for outputting an operation signal for selecting or manipulating a function supported by the image display device to the controller 209. In addition, the key input unit 210 has an IP zoom function key 212 for transmitting the IP zoom function selection signal to the control unit 209, and an enlargement ratio of a window indicating a zoom area on the first display area and the second display area. A window selection key 213 for setting the screen and a sub-screen size adjusting key 214 for adjusting the size of the first display area are separately provided.

The IP zoom function key 212, the window selection key 213, and the sub-screen size adjusting key 214 provided in the key input unit 210 are preferably provided in the remote controller. In an embodiment of the present invention, the key input unit ( The present invention will be described with reference to 210.

The RF tuner 201 tunes a broadcast signal from the antenna and outputs the tuned broadcast signal to the image processor 203.

The external input receiver 202 receives image content from an external input medium such as a DVD, a VCR, and a SET-TOP, and transmits the image content to the image processor 203. According to an exemplary embodiment of the present invention, a PIP zoom function may be applied to signals received through airwaves and cables and all moving images read from media such as DVD, VCR and SET-TOP.

The image processor 203 processes an input signal received through the RF tuner 201 or the external input receiver 202 into an image signal and transmits the image signal to the screen selector 204. The image processor 203 decodes according to the input signal and outputs the decoded image signal to the screen selector 204.

The screen selector 204 receives an image signal from the image processor 203, divides the entire display area of the image display apparatus into a first display area and a second display area, and controls whether to separate the input video signal. Is performed by the control. The video signal separated by the controller 209 is transferred to the first display area scaler 205 and the second display area scaler 206.

When the image signal is input from the image processor 203 and the IP zoom function key 212 is not input to the controller 209, the screen selector 204 outputs the input image signal to the second display area scaler 206. ) Is displayed on the second display area of the display unit 208. When the PIP zoom function is not executed, the user may watch the entire image of the video through the second display area, that is, the main screen of the image display device, like the general image display device.

When the input of the IP zoom function key 212 is received by the controller 209, a window indicating a specific area for enlarging the second display area on which a video is displayed is displayed. Here, when the window displayed on the screen of the second display area is input to the IP zoom function key 212 by the controller 209, the screen on which the controller 209 displays the entire area of the current video is displayed first. Determine which screen is displayed between the area and the second display area, and control the first display area scaler 205 and the second display area scaler 206 according to the result of the checking to display a window in the first display area and the second display area. Will be displayed.

In addition, the controller 209 controls the position of the window displayed on the screen to be moved according to the input of the direction keys 215, 216, 217, and 218 provided in the key input unit 210.

According to the exemplary embodiment of the present invention, when the specific area to be enlarged is selected by moving the position of the window in the same manner as above, the screen selector 204 causes the image signal input from the image processor 203 to receive the first display area scaler 205. The video signal in the window is switched to the second display area scaler 206 and transmitted respectively.

The controller 209 controls the first display area scaler 205 to display the window in the first display area in which the entire area of the video is to be displayed so that the window is displayed on the screen of the first display area.

In addition, the screen selection unit 204 sets an enlargement ratio of the size of the window to be displayed in the first display area and the second display area. Here, the enlargement ratio of the window according to the embodiment of the present invention is made up of 120%, 150%, 200%, 300% and 400%.

The first display area scaler 205 receives the entire image signal from the screen selector 204, scales it to the size of the first display area, and transmits the image signal to the image synthesizer 207. When the first display area scaler 205 receives an input of the sub-screen size adjusting key 214 from the control unit 209, the control unit 209 controls the direction keys 215, 216, and 217 of the key input unit 210. Control the size of the first display area to be adjusted according to the input of the controller 218. When the PIP zoom function is performed and the entire image of the video is displayed on the first display area, a window is displayed on the screen of the first display area under the control of the controller 209.

If the PIP zoom function is not executed, the second display area scaler 206 receives the entire video signal from the screen selector, scales it to the size of the second display area, and transmits the image to be displayed on the display unit 208. When the zoom function is executed, the image signal in the window is received from the screen selector 204 according to the exemplary embodiment of the present invention, and the input image signal is scaled according to the size of the second display area to the image synthesizer 207. send.

The image synthesizing unit 207 receives the image signal of the scaled second display area and the image signal of the first display area from the first display area scaler 205 and the second display area scaler 206, and receives the second display area. The video signal of the first display area is superimposed on a predetermined area of the video signal, and output to the display unit 208. However, if the PIP zoom function is not executed, the video signal is received only from the second display area scaler 206, and only the received video signal of the second display area is transmitted to the display unit 208.

In addition, the scaling and image synthesizing unit 207 of the first display area scaler 205 and the second display area scaler 206 according to the signal processing of the image processing unit 203 and the key manipulation of the key input unit 210 are performed. The synthesis function of the second display area video signal and the first display area video signal is already known and can be easily understood by those skilled in the art, so a detailed description thereof will be omitted.

The display unit 208 displays the video signal input from the video synthesizing unit 207. According to the exemplary embodiment of the present invention, the user can check the enlarged image through the second display area displayed on the display unit 208, and can confirm the progress of the video by checking the entire image of the video through the first display area. have. In addition, in order to check the enlarged image displayed on the second display area in detail, the enlarged image that changes according to the progress of the video may be set as a still image, so that the user may check and store the screen to be viewed in detail.

When there is another specific area that the user wants to enlarge, the user inputs the direction keys 215, 216, 217, and 218 provided in the key input unit 210 in a predetermined manner to determine the position of the window displayed on the first display area. I can move it. In this case, the position of the window is moved by the controller 209 controlling the first display area scaler according to the input of the direction keys 215, 216, 217, and 218 of the key input unit 210.

When the position of the window is moved to the first display area in the above manner, the controller 209 controls the image to which the position of the window is moved to be displayed on the second display area.

The controller 209 controls the PIP zoom operation of the image display apparatus according to the input of the key input unit 210. First, when the input of the PIP zoom function key 212 is not received by the controller 209, the controller 209 controls to transmit the image signal input to the screen selector 204 to the second display area scaler 206. The display area scaler 206 scales the input video signal to fit the size of the second display area and transmits the image signal to the image synthesizing unit 207.

At this time, since the video signal of the first display area is not input to the image synthesizing unit 205, only the video signal of the second display area is transmitted to the display unit 208, and the display unit 208 is configured to display the input of the second display area. The video signal is displayed on the second display area.

When the IP zoom function key 212 is input from the key input unit 210 when the video is reproduced through the second display area, the controller 209 displays an image on the screen of the second display area where the entire area of the video is reproduced. A window is displayed on the screen, and the second display area scaler 206 is controlled to move the window displayed on the screen according to the input of the direction keys 215, 216, 217, and 218 provided in the key input unit 210.

When the window is selected by moving the position according to the input of the direction keys 215, 216, 217, and 218 from the key input unit 210, the controller 209 is input from the image processor 203 to the screen selector 204. The video signal is transmitted to the first display area scaler 205 and the video signal in the window is transmitted to the second display area scaler 206.

In addition, the control unit 209 controls the screen selection unit 204 to set the enlargement ratio of the window. According to the exemplary embodiment of the present invention, when the window selection key 213 is input to the controller 209 from the key input unit 210, 120%, 150%, which are enlargement ratios of the window, according to the input window selection key 213. At least one magnification ratio of 200%, 300% and 400% is controlled to be circulated and set, and when scaling is performed in the first display area scaler 205, the size of the window is controlled to be displayed at the set magnification ratio.

When the sub-screen adjustment key 214 is input from the key input unit 210, the controller 209 adjusts the size of the first display area according to the input of the key input unit 210 by the first display area scaler 205. To control. In addition, the first display area and the second display area displayed on the display unit 208 are controlled to store the image data of the still image and the moving image according to the user's input.

3 is an exemplary screen illustrating a process of performing a PI zoom function according to an exemplary embodiment of the present invention.

In the embodiment of the present invention, first, as shown in FIG. 3A, when the P. zoom function key 212 is input from the key input unit 210 to the controller 209 at the time of playing a video through the main screen of the video display device, The control unit 209 displays a window on the screen of the main screen as shown in Fig. 3B. The size of the window displayed on the screen is displayed at the enlargement ratio set by the screen selector 204. When predetermined direction keys 215, 216, 217, and 218 are input to the control unit 209 from the key input unit 210 within a predetermined time, the window to be moved on the screen and enlarged as shown in FIG. 3C. Select the location of.

When the position of the window is selected in this way, the controller 209 controls the screen selector 204 to transmit the image signal input from the image processor 203 to the first display area scaler 205, and the image signal in the window is The control is transmitted to the second display area scaler 206.

In this way, the image signals transmitted to the first display area scaler 205 and the second display area scaler 206 are scaled to fit the respective sizes and transmitted to the image combining unit 207. The image synthesizer 207 is synthesized and displayed on the display unit 208 as shown in FIG. 3D.

Through the screen shown in FIG. 3D, the user can continuously check the progress of the video, move to another area to enlarge the position of the window displayed on the sub-screen, and enlarge the other area as shown in FIG. 3E.

FIG. 4 is a diagram illustrating the configuration of a remote controller in an image display device having an image enlargement function using a PIP according to the present invention.

Like reference numerals denote like elements illustrated in the key input unit 210 of FIG. 2.

Referring to FIG. 4, a remote control of an image display apparatus having an image enlargement function using a PIP according to the present invention is a menu key 401 used to instruct loading and closing of a GUI screen configured as a menu screen of an image display apparatus. Enter key 402 used to select a normal menu, return key 403 used to return to the previous screen from the current screen, direction keys for moving the position of the window and adjusting the size of the first display area ( 215, 216, 217, and 218), a PIP zoom function key 212 for executing the PIP zoom function, a window selection key 213 for setting the magnification ratio of the window, and a size of the first display area And a sub-screen size adjusting key 214.

The menu key 401 is used to instruct loading and closing of the GUI screen composed of the menu screen. The user may check each menu provided by the image display apparatus using the menu key 401.

The enter key 402 is used when the user selects each menu provided by the image display apparatus.

The return key 403 is used to return to the previous screen from the current screen.

The storage key 404 is used to store the still image and the image data of the moving image desired by the user in the entire image and the enlarged image of the moving image being reproduced in the first display area and the second display area of the display unit 208. By using the storage key 404, the user can easily store image data, and edit the stored image data.

The direction keys 215, 216, 217, and 218 are also used as up, down, left, and right direction keys for instructing the movement of the windows displayed on the first display area and the second display area and adjusting the size of the first display area. do.

And a PIP zoom function key 212 for executing the PIP zoom function, a window selection key 213 for setting a magnification ratio of the windows displayed on the first display area and the second display area, and the first display area. The first display area size adjusting key 214 for adjusting the size performs the same function as described with reference to FIG. 2.

The remaining keys are known keys for operating the image display device, and detailed descriptions of the functions of each key will be omitted.

5 is an exemplary view illustrating an enlargement ratio of a window according to the present invention.

Referring to FIG. 5, the enlargement ratios of the windows displayed on the first display area and the second display area are 120%, 150%, 200%, 300%, and 400%. The magnification ratio is set in the screen selection unit 204 in accordance with the key input.

In an embodiment of the present invention, when the user inputs the window selection key 213 provided in the key input unit 210, the enlargement ratio of the windows displayed on the first display area and the second display area is determined by the window selection key 213. In response to the input of the control unit 209 controlling the screen selection unit 204 according to the input of the window selection key, the magnification ratio is set.

If the control unit 209 receives the input of the window selection key 213 from the key input unit 210 and the input of the up and down direction keys 215 and 216 is detected within a predetermined time, 120%, 150%, 200%, 300 Controls that at least one magnification ratio of% and 400% is circulated and set. The enlargement ratio of the window can be set even when the PIP zoom function is executed.

6 is a flowchart illustrating an image enlargement method using PIP in the image display apparatus according to the present invention.

Referring to FIG. 6, when a video is reproduced through a second display area of the display unit 208, that is, through a main screen of an image display device (601), the PIP zoom function is executed in the control unit 209 (602). In operation 603, a window is displayed on the screen of the second display area where the video is being played. When the predetermined direction keys 215, 216, 217, and 218 are input to the controller 209 from the key input unit 210 within a predetermined time, the controller 209 displays the screen of the second display area according to the input of the predetermined direction keys. Control to move the position of the window displayed on the screen.

When the position of the window is selected in response to the input of the predetermined direction keys 215, 216, 217, and 218 from the key input unit 210 to the control unit 209 (605), the screen selection unit 204 controls the control of the control unit 209. Accordingly, the video signal input from the image processing unit 203 is transmitted to the first display area scaler 205, and the video signal in the window is transmitted to the second display area scaler 206 so as to transmit the first display area of the display unit 208. The entire area and the window of the video are displayed on the screen, and the image within the window is enlarged and displayed on the second display area (606).

As such, the user may check the enlarged image through the second display area, and the user may view an unexpanded portion of the video through the first display area in which the entire area of the video is displayed, thereby continuing to check the progress of the video. .

If there is another specific area in which the user wants to enlarge in the entire area displayed on the first display area, the user moves to another area in which the position of the window displayed on the first display area is desired to be enlarged (607).

Herein, as a method of moving the window of the first display area, a user inputs the direction keys 215, 216, 217, and 218 provided in the key input unit 210 of the image display apparatus in a predetermined manner to move the position of the window. It consists of

When the position of the window is moved in this way, the control unit 209 enlarges and displays the image of the window in which the position of the first display area is moved in the second display area of the display unit 208 (608). When the PIP zoom function is released by the user, the controller 209 displays the video in full screen on the second display area of the display unit 208 (609).

In this way, the user can watch all other areas that are not enlarged when executing the zoom function of the video, so that the progress of the video is not missed, and if there is another area to be enlarged in the video, the user does not need to return to the full screen. The window can be enlarged by changing the position by using a predetermined key provided in the image display device or the remote control to a specific area to be desired.

7A and 7B are exemplary screen diagrams illustrating an execution screen of an IP zoom function of an image display apparatus having an image enlargement function using an IP according to the present invention.

When a user views a video through the second display area 701 of the image display device having the image enlargement function using the PIP according to the embodiment of the present invention, the user enlarges the video displayed on the second display area 701. If there is a part to be desired, the user executes the PIP zoom function and inputs a predetermined key provided in the key input unit 210 to the window displayed on the screen to select a specific area.

When the PIP zoom function is executed and the window is selected in the above manner, the control unit 209 displays the second display area 701 and the first display area 702 on the display unit 208 as shown in FIG. 7A. Display.

In the first display area 702 displayed on the display unit 208, the enlargement ratio of the window 703 indicating the entire area and the specific area of the video and the window 603 is displayed. The second display area 701 of the display unit 208 enlarges and displays an image of the window 703 selected by the user in the first display area 702.

The user can enlarge and check the image through the entire area of the video displayed on the second display area 701 and the first display area 702 of the display unit 208 and the window. You can watch the video so you do not miss the progress of the video.

In addition, in the images displayed on the first display area 702 and the second display area 701, it is possible to easily store image data of a still image and a video desired by a user.

If there is another specific area that the user wants to enlarge in the entire area displayed on the first display area 702, the user moves the window 703 displayed on the first display area 702 to the key input unit 210 of the image display device. By inputting the provided direction keys 215, 216, 217, 218 in a predetermined manner, the position of the window 703 to be enlarged can be moved up, down, left, and right.

When the position of the window 703 is moved in this way, the controller 209 enlarges and displays the image in which the position of the window 703 is moved in the second display area 701 as shown in FIG. 7B.

Through the image displayed on the second display area 701 and the first display area 702 obtained through the above method, the user can determine which part of the entire image is the image of the enlarged second display area. By freely moving the position of the window displayed in the display area, only the desired part can be clearly identified, and image data of still and moving images can be stored and edited.

The present invention described above is capable of various substitutions, modifications, and changes without departing from the spirit of the present invention for those skilled in the art to which the present invention pertains, and the above-described embodiments and accompanying It is not limited by the drawings.

As described above, when the user executes a zoom function of the video display device to enlarge a specific area of the video when the user watches a video using the video display device, the first display area and the first display area using the PIP function are first displayed. 2 The display area can simultaneously display the magnified image of the specific region and the entire image of the video on the screen, so that the remaining portion of the image can be continuously watched.

In addition, when the user wants to enlarge another specific area of the video, the user can freely move the position of the window representing the specific area so that the user can clearly see only the desired part. There is an effect to improve the convenience.

Claims (12)

In the video display device supporting the PIP function, A key input unit having a plurality of keys, An image processor which processes an input signal into an image signal; When the video signal from the image processor is input and the PIP function is selected, the entire display area is divided into a first display area and a second display area, and the entire video signal is displayed on the first display area. And a PIP image processor configured to display a partial image signal of a specific region selected by a window among the entire image signals in a second display region. Wherein the PPI is configured to display the window on all image signals displayed in the first display area and to change the position of the window by a key input from the key input unit. The image processing apparatus of claim 1, wherein the IP image processor comprises: A control unit which performs overall control for the PIP zoom function; A screen selector which inputs a video signal from the video processor and separates and outputs the partial video signal from the video signal under control by the controller; A first display area scaler for scaling the entire video signal from the screen selection unit to fit the size of the first display area under control of the controller; A second display area scaler for scaling the partial video signal from the screen selection unit to match the size of the second display area under control of the controller; And an image synthesizing unit for synthesizing all image signals and partial image signals from the first and second display area scalers and outputting one image signal under the control of the controller. The method of claim 1, wherein the input signal is And an image content provided from an external input medium through an external input receiver and a broadcast signal received through an antenna. The method of claim 1, And a storage unit which stores at least one of the entire image signal and the partial image signal under the control of the controller. The method of claim 1, And the second display area as the main screen, and the second display area as the sub picture. The method of claim 1, And the second display area is a main screen, and the second display area is a main screen. An image display method in an image display apparatus supporting a PIP function, A first process of processing an input signal into an image signal; A second process of displaying the entire video signal processed by the video signal on a first display area and displaying a partial video signal of a specific area selected by a window on the entire video signal displayed on the first display area on a second display area; Include, Wherein the position of the window is changed by a key input from a key input unit. The method of claim 7, wherein the second process, Separating and outputting the partial video signal from the entire video signal; Scaling the entire video signal to fit the size of the first display area; Scaling the partial video signal to fit the size of the second display area; And outputting one video signal of the entire video signal in which the scaling is performed and the partial video signal in which the scaling is performed. The method of claim 7, wherein the input signal is one of a broadcast signal received through an antenna and video content provided from an external input medium through an external input receiver. The method of claim 7, wherein And storing at least one video signal among the full video signal and the partial video signal under the control of the controller. The method of claim 7, wherein And the second display area is a sub screen, and the first display area is a main screen. The method of claim 7, wherein And the second display area is a main screen, and the second display area is a main screen.

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