KR20100046398A - Display apparatus and method for zooming image - Google Patents

Abstract

PURPOSE: A display apparatus and method for zooming an image are provided to confirm a currently-selected portion by simultaneously an original screen and the expanded screen. CONSTITUTION: A display unit(20) displays a main screen image, and an extension region selector(30) selects a certain expansion region from a main image. According to a preset extension ratio, a sub screen processor(40) process the sub screen image of a selected extension region. A control unit(50) determines the position of the display of a sub image. Based on the position of the display, the control unit displays the image of a sub screen in a predetermined region.

Description

Image display apparatus and its image zooming method {Display apparatus and method for zooming image}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image display device, and more particularly, to an image display device and an image enlargement method thereof for enlarging and displaying a specific portion of an image based on a picture in picture (PIP) function.

In recent years, there has been a growing interest in digital broadcasting (terrestrial, cable or satellite digital broadcasting), which provides much clearer image and sound quality compared to analog broadcasting, and some areas are testing digital broadcasting or soon. Planning to implement or implement

Therefore, the spread of digital TVs that can cope with such digital broadcasting is rapidly spreading.

In addition to the advantages of providing a high quality image and sound, digital broadcasting can be a significant advantage of the significant improvement of the user interface using additional digital service data transmission and graphics.

The digital terrestrial broadcasting system transmitting the digital broadcast signal compresses and transmits the digital video and audio data using a predetermined compression algorithm, for example, a hybrid encoding algorithm, and the digital TV receiving the video and audio data is compressed and transmitted. To restore the original data to the viewer.

Recently, a recording medium capable of storing broadcast data in such a digital TV, for example, a method in which a hard disk is combined has been developed. Since a hard disk is a mass storage device, a large amount of data can be recorded.

Such devices are provided with a time shift function for storing TV broadcast program data on a hard disk and allowing the user to watch it again later or store the TV broadcast program data on the hard disk.

On the other hand, such a conventional device is not provided with a function for enlarging the selected portion after selecting only a portion of the entire screen displayed by the user, if the screen enlargement function as described above is provided in such a device, more various users Will be able to meet the needs of

In addition, although a function for enlarging a portion selected by the user is currently provided, a conventionally provided enlargement function enlarges the entire image at a predetermined ratio, or enlarges only the portion selected by the user to display the entire screen.

Therefore, according to the first method, when the user wants to enlarge only the area currently selected by the user, there is a problem that the entire area is enlarged as described above. There is a problem that cannot determine which area of the entire screen.

According to an exemplary embodiment of the present invention, a specific portion of the image screen is enlarged using the PIP function, so that the user can easily and conveniently view the enlarged image of the selected area.

In addition, according to an embodiment of the present invention, an enlarged image of the selected area is displayed to correspond to the position of the area selected by the user so that it is easy to determine which part of the original image corresponds to the enlarged image selected by the user.

An image display device according to an embodiment of the present invention includes a display unit for displaying a main screen image; An enlarged area selector for selecting a specific enlarged area to be enlarged from the main screen image; A sub-screen processor which processes the sub-screen image of the magnified area selected by the magnified area selector according to a preset magnification ratio; And a controller configured to determine a display position of the sub-screen image according to the position of the selected enlarged region and to control the sub-screen image to be displayed on a predetermined area of the display unit based on the determined display position.

A control method of an image display device according to an embodiment of the present invention includes the steps of displaying a main screen image; Selecting a specific magnification area to be enlarged from the displayed main screen image; Enlarging a sub-screen image of the selected enlarged area according to a preset enlargement ratio; And displaying the sub-screen image on a specific portion of the main screen image based on the position of the selected specific magnification area.

According to an embodiment of the present invention, an image display device and an image enlargement method thereof can easily select a portion to be enlarged by a user on a whole screen, and can easily handle a magnification adjustment arbitrarily by integrating an original screen and an enlarged screen. By expressing at the same time, there is an effect that the user can easily check which part he or she currently selected.

In conclusion, the image display device and its image magnification method according to an exemplary embodiment of the present invention enlarge and show a specific portion of the original screen, so that the contents of the specific portion of the screen can be emphasized, and people at a long distance can see the original image. It's easy to see what's important in.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings. However, the spirit of the present invention is not limited to the embodiments presented, and other embodiments included within the scope of other inventive inventions or the scope of the present invention can be easily made by adding, changing, or deleting other elements. I can suggest.

The term used in the present invention is selected as a general term widely used as possible at present, but in certain cases there is also a term arbitrarily selected by the applicant, in which case the meaning is described in detail in the description of the invention, the name of a simple term It should be clear that the present invention is to be understood as a meaning of terms.

1 is a block diagram illustrating a configuration of an image display device according to an embodiment of the present invention, FIG. 2 is a view for explaining an enlarged area selection operation of the image display device according to an embodiment of the present invention, and FIG. 4 is a view illustrating a sub-screen image of an image display device according to an embodiment of the present invention, FIG. 4 is a view illustrating an image enlarged screen of an image display device according to an embodiment of the present invention, and FIG. 5 is an embodiment of the present invention. Is a flowchart for explaining a method of enlarging an image of an image display device according to a step-by-step method

As shown in FIG. 1, an image display device according to an exemplary embodiment of the present invention includes a main screen processor 10 for signal processing a main screen image input from an external device, and a display unit for displaying the signal processed main screen image. 20, an enlarged region selector 30 for selecting a specific enlarged region to be enlarged from the main screen image, and a sub-screen image of the enlarged region selected by the enlarged region selector 30 at a preset ratio; And determine a display position of the sub-screen image according to the selected position of the sub-screen processing unit 40 to perform signal processing according to the selected position of the enlarged area, and the sub-screen processing unit 40 The main controller 50 controls the screen image to be displayed and the main screen based on the display position of the sub-screen image determined by the controller 50. It is configured to include the face image and the sub screen image integration processing unit 60 which integrates handle.

Hereinafter, the operation of the image display device according to an embodiment of the present invention configured as described above will be described.

The main screen processing unit 10 processes a video signal input from the outside, and the signal processed video signal is displayed on the display unit 20.

Substantially, the main picture processor 10 includes an MPEG-2 decoder and a scaler for converting a video signal to a vertical frequency, a resolution, an aspect ratio, etc. according to an output standard of the display 20.

Here, the display unit 20 may be applied to various types of display modules such as digital light processing (DLP), liquid crystal display (LCD), plasma display panel (PDP), and the like.

Accordingly, the main screen image as shown in FIG. 2 is displayed on the display 20 in the entire area of the display screen.

In this case, the user may select a specific region of the main screen image displayed on the display screen and enlarge the selected portion at a desired ratio.

That is, when an image magnification command is input from the magnification area selection unit 30, the controller 50 controls the user to select any specific area to be magnified from the main screen image through the magnification area selection unit 30. do.

In this case, in the method for selecting a specific area to be enlarged, a magnified area may be selected by displaying a box of a specific size, and the main screen image is divided into a plurality of blocks (for example, nine), and the division is performed. The user can select a desired enlarged area based on the location information and the size information of each block.

Hereinafter, a method of selecting an enlarged area by displaying the specific size and a box will be described.

When an image magnification command is input from the magnification area selection unit 30, the controller 50 selects a magnification area on one side of a display screen on which the main screen image is displayed. Control to display.

In other words, when an image magnification command is input from the user as shown in FIG. 2, a selection box 110 for setting the image magnification area is displayed on one side of the display screen 100 on which the main screen image is displayed.

In this case, the selection box 110 is displayed at a preset size, and the size of the selection box may be arbitrarily increased or decreased according to a user selection.

For example, when the resolution of the display screen 100 is 1920 * 1080, the selection box 110 is displayed in a size of 200 * 200 by default. In addition, the size of the selection box 110 may be increased or decreased in the vertical direction according to the user's selection, and likewise, the size of the selection box 110 may be increased or decreased in the horizontal direction.

After the user determines the size of the selection box 110, the user moves the position of the selection box 110 to the left / right / up / down to select an area to be enlarged.

When the enlarged area is selected from the enlarged area selector 30 as described above, the controller 50 determines the size of the sub-screen image according to the size of the selection box according to the selection of the enlarged area and a preset ratio.

Herein, the ratio means an enlargement ratio of the selected enlarged region.

In other words, the size of the sub-screen image is selectively varied according to the size of the selected enlarged area and a preset ratio.

For example, when the size of the selection box is 200 * 200 and the magnification is 200%, the controller 50 determines the size of the sub-screen image as 400 * 400. Similarly, if the enlargement ratio is set to 300%, the size of the sub-screen image is 600 * 600.

The sub-screen processing unit 40 scales the sub-screen image of the enlarged area selected by the enlarged area selection unit 30 according to the size of the sub-screen image determined by the controller 50.

In other words, the sub-screen processor 40 enlarges the sub-screen image of the magnified area selected by the magnified area selector 30 according to the set ratio.

Accordingly, as shown in FIG. 3, the sub-screen image 200 of the enlarged area selected by the user at the set size is generated.

The controller 50 controls the main screen image and the sub-screen image to be displayed in a predetermined area of the display unit 30, respectively.

In this case, the controller 50 determines the display position of the sub-screen image displayed on the display unit 30.

The display position of the sub-screen image is determined based on the enlarged area selected by the user.

That is, when an initial image magnification command is input, the selection box 110 is displayed at a preset position by default. Accordingly, when the user moves the position of the selection box 110, the controller 50 detects a movement position of the selection box 110, and displays the sub-screen image corresponding to the detected position. Control as possible.

For example, suppose that the selection box 110 for selecting the magnification area is displayed at positions 960 and 540 of the display screen 100 (where the position of the selection box is horizontal to the selection box). The position of the selection box is 1060 and 540 when the user moves the selection box 110 to the right by 10 blocks.

Accordingly, the controller 50 allows the central portion of the sub-screen image enlarged by the sub-screen processing unit 40 to be located in regions 1060 and 540 of the main screen image.

Accordingly, as shown in FIG. 4, the integrated processor 60 integrates the main screen image 100 and the sub-screen image 200 based on the display position of the sub-screen image determined by the controller 50. do.

In conclusion, in the image display device according to an embodiment of the present invention, the size of the sub-screen image is determined according to the enlargement area and the enlargement ratio selected by the user, and the position where the sub-screen image is displayed according to the position of the selected enlarged area. Is determined.

Hereinafter, a simple example will be described to help understand an image magnification operation of an image display device according to an exemplary embodiment of the present invention.

First, it is assumed that the resolution of the display screen is 1920 * 1080 and the size of the selection box set by the user is 200 * 200. The center position of the selection box that is initially displayed is displayed at the center position of the display screen, and thus the center positions of the selection box are 960 and 540.

At this time, if the user moves the position of the selection box to the right by 10 blocks and assumes that the currently set magnification ratio is 200%, the size of the sub-screen image is 400 * 400 and the sub-screen image having the size of 400 * 400. This displayed position is 1060 and 540.

As described above, the image display device according to the embodiment of the present invention can easily select a portion to be enlarged by the user on the entire screen, and can easily handle the magnification adjustment arbitrarily. By zooming in, the user can easily check which part he or she currently selected.

In conclusion, the image display device according to an exemplary embodiment of the present invention enlarges and displays a specific portion of the original screen, so that the contents of the specific portion of the screen can be emphasized, and people at a distance from the important portion of the original image It is easy to understand the contents.

In the image enlargement method of the image display device according to the embodiment of the present invention configured as described above, as shown in FIG. 5, the main screen image is first displayed (S10).

Subsequently, a specific magnified area to be enlarged is selected from the main screen image (S20). That is, when an image magnification command is input from the outside, a selection box for selecting the image magnification area is displayed, and accordingly the size of the selection box and the position of the selection box are moved so that one of the main screen images can be enlarged by itself. Set a specific magnified area.

Then, the size of the sub-screen image is determined according to the size of the set selection box and the preset magnification ratio (S30).

Subsequently, the sub-screen image of the selected enlarged area is enlarged based on the determined size (S40).

In operation S50, the display position at which the sub-screen image is displayed is determined to correspond to the selected position of the enlarged area. That is, the display position of the sub-screen image is set such that the center portion of the sub-screen image is located at the center of the magnified area.

Subsequently, the main screen image and the sub-screen image are integrated with respect to the determined display position of the sub-screen image (S60).

The sub-screen image of the determined specific size is displayed at the display position of the main screen image as the integrated process is performed (S70).

As described above, the image enlargement method of the image display apparatus according to an exemplary embodiment of the present invention can easily select a portion to be enlarged by the user on the entire screen, and can easily handle the magnification adjustment arbitrarily. By integrating and presenting at the same time, users can easily see which part they have selected.

In conclusion, the method of enlarging an image of an image display apparatus according to an embodiment of the present invention enlarges and displays a specific portion of the original screen, thereby emphasizing the contents of the specific portion of the screen, and also allows people at a distant distance to It's easy to see what's important.

1 is a block diagram showing the configuration of a video display device according to an embodiment of the present invention.

2 is a view for explaining an enlarged area selection operation of an image display device according to an embodiment of the present invention;

3 is a diagram for describing a sub-screen image of an image display device according to an exemplary embodiment of the present invention.

4 is a diagram illustrating an image enlarged screen of an image display device according to an exemplary embodiment of the present invention.

5 is a flowchart illustrating a step-by-step method of enlarging an image of an image display device according to an exemplary embodiment of the present invention.

Claims (9)

A display unit displaying a main screen image; An enlarged area selector for selecting a specific enlarged area to be enlarged from the main screen image; A sub-screen processor which processes the sub-screen image of the magnified area selected by the magnified area selector according to a preset magnification ratio; And, And a control unit configured to determine a display position of the sub-screen image according to the selection position of the enlarged area and to control the sub-screen image to be displayed on a predetermined area of the display unit based on the determined display position. . The method of claim 1, And the controller selectively varies the size of the sub-screen image according to the size of the selected enlarged area and the set ratio. The method of claim 1, And the control unit selectively varies the display position of the sub-screen image according to the selected position of the enlarged area. 3. The method of claim 2, And an integrated processor configured to integrate and process the main screen image and the sub screen image on the basis of the determined display position of the sub screen image. Displaying a main screen image; Selecting a specific magnification area to be enlarged from the displayed main screen image; Enlarging a sub-screen image of the selected enlarged area according to a preset enlargement ratio; And, And displaying the sub-screen image on a specific portion of the main screen image based on the position of the selected specific magnification region. The method of claim 5, Selecting the specific magnified area is Displaying a selection box of a specific size for selecting an enlarged area; Determining a size of the displayed selection box; And moving the position of the selection box of which size is determined to a top / bottom / left / right to select a specific magnification area. The method of claim 6, And determining the size of the sub-screen image according to the determined size of the box and the set ratio. The method of claim 5, And determining a display position of the sub-screen image corresponding to the selected position of the enlarged region. The method of claim 8, Displaying the sub-screen image Integrating the main screen image and the sub-screen image based on the determined display position of the sub-screen image; And displaying the integrated main screen image and the sub screen image.

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