KR100443868B1 - Method and apparatus for zooming image in image display appliance - Google Patents

Abstract

The present invention relates to an image magnification method and apparatus in an image display device capable of enlarging a desired image while maintaining the ratio of the width and length of the original image regardless of the type of the image display device. The method of the present invention determines a range in which a user wants to enlarge a specific image, operates an input device of an image display device to display a 4: 3 or 16: 9 OSD enlargement window, and selects the OSD enlarged window. Determining whether the currently displayed display mode is a 4: 3 OSD window; if the determination result is a 4: 3 OSD window, displaying a 4: 3 OSD screen on the image display device; Displaying a 16: 9 OSD screen on the video display device, if not a: 3 OSD window, and expanding the magnification ratio according to the selection of 4: 3 or 16: 9 based on the ratio of the image on which the video display device is a reference. Executing an image procedure and displaying an enlarged image according to a ratio of an OSD window selected by the user.

Description

Image magnification method and apparatus of image display device {METHOD AND APPARATUS FOR ZOOMING IMAGE IN IMAGE DISPLAY APPLIANCE}

The present invention relates to an image display device, and more particularly, to an image magnification method and apparatus for an image display device for selecting and enlarging an image in a ratio of 4: 3 or 16: 9 according to a signal format of an input image signal. .

Recently, as digital television broadcasting is performed, video display devices are changing from the conventional 4: 3 format display method to the 16: 9 format display method. Digital video signals have high resolution and high resolution, and a high level of image processing technology is required to process such digital video signals.

In addition, users often require an image magnification function, and the image magnification technology is also developing along with it.

However, the image magnification technology provided up to now uses a method based on an image display device, not based on an image format, because it enlarges a specific portion of an image signal.

Therefore, when the specific portion is enlarged, the enlarged video signal is distorted because it is not enlarged in proportion to the original video format ratio.

For example, if the image display device has a 4: 3 ratio and the input image has a 16: 9 ratio, and if the existing zooming method is applied, the image is narrowed horizontally as shown in FIG. There was a problem showing.

In addition, when the input image has a 4: 3 ratio and the image display device has a 16: 9 ratio, there is a problem of showing a fat screen in which the image is widened as shown in FIG. 1B.

An object of the present invention is to solve the above-mentioned problems of the prior art, an image display apparatus capable of enlarging a desired image while maintaining the aspect ratio of the original image regardless of the type of the image display apparatus. To provide a method and apparatus for image magnification.

Another object of the present invention is to provide an image magnification method and apparatus of an image display device that can easily provide a control operation according to magnification when a user magnifies a specific image.

1A and 1B are diagrams illustrating 4: 3 and 16: 9 screens, respectively, in a case where a 4: 3 aspect ratio of a general input image is 4: 3.

2A and 2B are diagrams showing screens of a specific image using 4: 3 and 16: 9 OSD windows according to the present invention.

3A and 3B show an image of an OSD window having a 4: 3 ratio and an OSD window having a 16: 9 ratio according to the present invention in a 4: 3 ratio and a 16: 9 ratio according to a user's operation. Figures showing respectively.

4 is a control flowchart schematically illustrating an image enlargement procedure of an image display device according to the present invention;

5 is a circuit diagram of an image magnification apparatus of an image display apparatus according to an exemplary embodiment.

6 is a control flowchart illustrating an image enlargement procedure according to selection of a manual setting key in an image display device according to an exemplary embodiment.

7 is a circuit diagram of an image enlargement apparatus of an image display device according to another exemplary embodiment.

8 is a control flowchart illustrating an image enlargement procedure in an image display device according to another exemplary embodiment.

* Description of the symbols for the main parts of the drawings *

1: analog / digital converter

2: image processor

3: display device

4: microprocessor

5: input format detector

In order to achieve the above object, the image magnification apparatus of the image display apparatus of the present invention receives an analog / digital converter for converting an input analog image signal into a digital signal, and receives a digital image signal output from the analog / digital converter. An image processor for converting to an image format suitable for a display device, displaying a 4: 3 or 16: 9 OSD window according to a magnification mode selected by the user, and enlarging an image portion of the OSD magnification window; And a microprocessor for generating and providing a control signal for an image enlargement procedure to the image processor, and a display device for displaying an image, an OSD window, and an enlarged image output from the image processor under control of the microprocessor.

Preferably, the image magnification device of the present invention is further provided with an input format detector for detecting the format of the input signal and displaying it on the display device when the magnification mode is selected.

In another aspect of the present invention, an image enlargement method of an image display device includes: determining a range in which a user wants to enlarge a specific image, and operating an input device of the image display device to display a 4: 3 or 16: 9 OSD enlargement window. Wow; If the user selects an OSD zoomed-in window, the image display device determines whether the currently set display mode is a 4: 3 OSD window; If the determination result is a 4: 3 OSD window, displaying a 4: 3 OSD screen on the image display device, and if the determination result is a 4: 3 OSD window, displaying a 16: 9 OSD screen on the image display device; Executing the magnification image procedure by varying the magnification ratio according to selection of 4: 3 or 16: 9 based on the ratio of the reference image; And displaying the enlarged image according to the ratio of the OSD window selected by the user.

According to an aspect of the present invention, an image range to be enlarged is displayed in an OSD form, and the display ratio of the image display device to be enlarged is 4: 3 ratio according to the user's selection regardless of the type of image display device. The advantage is that it can be displayed using 16: 9 ratio.

Hereinafter, with reference to the accompanying drawings will be described the configuration and operation of the present invention.

2A and 2B are diagrams illustrating screens of a specific image using 4: 3 and 16: 9 OSD windows according to an embodiment of the present invention. That is, before a specific image is enlarged, an OSD window having a 4: 3 ratio as shown in FIG. 2A and an OSD window having a 16: 9 ratio as shown in FIG. 2B are shown using a 16: 9 image display device.

5 is a circuit diagram of an image enlargement apparatus in an image display apparatus according to an exemplary embodiment.

Referring to FIG. 5, in the image display apparatus of the present invention, an image magnification apparatus includes an analog / digital converter 1 for converting an input analog video signal into a digital signal, and a digital video signal output from the analog / digital converter 1. A video processor (2) for receiving a video signal, converting the video format into an image format suitable for an image display device, opening a 4: 3 or 16: 9 OSD window according to a magnification mode selected by the user, and enlarging the video portion of the corresponding OSD window And a microprocessor (4) for generating and providing a control signal for an image enlargement procedure to the analog / digital converter (1) and the image processor (2), and output from the image processor (2) under the control of the microprocessor (4). And a display device 4 for displaying the image, the OSD window, and the enlarged image.

Here, the display device 4 is preferably selected from a PDP, an LCD, a projection, a CRT, a projector, and the like.

4 is a control flowchart schematically illustrating an image enlargement procedure in the image display apparatus according to the present invention.

Referring to FIG. 4, a user first defines a range in which a corresponding image is to be enlarged (S401), and opens a 4: 3 or 16: 9 OSD enlargement window by operating an input device of the image display device (S402).

Subsequently, when the user selects a floating magnification window (S403), the image display device determines whether the currently set display mode is a 4: 3 OSD window (S404). In this case, if the determination result is a 4: 3 OSD window, the 4: 3 OSD screen is displayed on the image display device (S405). If the determination result is not a 4: 3 OSD window, the 16: 9 OSD screen is displayed on the image display device. (S407). Here, the determination operation may be set to be executed automatically.

Subsequently, the image processor 2 of FIG. 5 executes the magnification image procedure while varying the magnification ratio according to the selection of 4: 3 or 16: 9 based on the ratio of the reference image (S406 and S408).

That is, the analog-to-digital converter 1 of FIG. 5 converts a video signal corresponding to a 4: 3 OSD screen into a digital signal and delivers it to the image processor 2. The image processor 2 receives a digital signal output from the analog / digital converter 1 and converts the digital signal into an image format suitable for an image display device.

Subsequently, the image processor 2 displays the enlarged image on the display 4 according to the ratio of the OSD window selected by the user (S409).

According to the present invention outlined above, as shown in FIGS. 3A and 3B, a 16: 9 image can be enlarged even in a 4: 3 image display device as shown in FIG. 3A, and a 16: 9 image as shown in FIG. 3B. It can be seen that the 4: 3 image can be enlarged and viewed on the display device.

6 is a control flowchart illustrating an image enlargement procedure according to selection of a manual setting key in an image display device according to an exemplary embodiment.

Referring to FIG. 6, when a user inputs an "enlargement key" provided in a key input unit of an image display device (S601), the image display device displays a currently set magnification mode state (S602). In this case, the image display apparatus determines whether the user selects the "confirmation key" (S603), and if the "confirmation key" is selected as a result of the determination, the image display apparatus displays an OSD screen according to the currently set mode on the screen (S605), Perform the magnified imaging procedure. However, if the "confirmation key" is not selected, the magnification mode is changed (S604), and the current magnification mode is changed to the mode according to the user's setting.

Next, the image display device determines whether the currently set display mode is a 4: 3 OSD window (S606). In this case, if the determination result is a 4: 3 OSD window, the 4: 3 OSD screen is displayed on the image display device. If the determination result is a 4: 3 OSD window, the 16: 9 OSD screen is displayed on the image display device. Subsequently, when the user selects positions of the image to be enlarged by moving the OSD window (S607a and S607b), the image display device determines whether the user inputs an "enlargement key" (S608a and S608b). As a result of determination, when the user inputs the "enlargement key", the 4: 3 or 16: 9 OSD screen is displayed on the video display device (S609a, S609b).

Subsequently, the image display apparatus executes the magnified image procedure while varying the magnification ratio according to the selection of 4: 3 or 16: 9 based on the ratio of the reference image (S610a and S610b).

Subsequently, the image display apparatus displays the enlarged image on the image display apparatus according to the ratio of the OSD window selected by the user (S611).

7 is a circuit diagram of an image magnification apparatus in an image display apparatus according to another exemplary embodiment. The image magnification processing apparatus of the image display device according to FIG. 7 is for explaining an automatic setting procedure according to a wide or normal state of an input signal, and is substantially the same as that of FIG. 5. An input format detector 5 for displaying on the display device 4 is further provided.

8 is a control flowchart illustrating an image enlargement procedure in an image display device according to another exemplary embodiment.

Referring to FIG. 8, when the user inputs an "enlargement key" provided in the key input unit of the image display device (S801), the image display device automatically displays the format of the input signal according to the detected format (S802). In this case, the image display apparatus determines whether the user selects the "confirmation key" (S803). If the "confirmation key" is selected as a result of the determination, the image display apparatus displays an OSD screen according to the currently set mode on the screen (S805). Perform the magnified imaging procedure. However, if the "confirmation key" is not selected, the magnification mode is changed (S804), and the current magnification mode is changed to the mode according to the user's setting.

Subsequently, the image display device determines whether the currently set display mode is a 4: 3 OSD window (S806). In this case, if the determination result is a 4: 3 OSD window, the 4: 3 OSD screen is displayed on the image display device. If the determination result is a 4: 3 OSD window, the 16: 9 OSD screen is displayed on the image display device. Subsequently, when the user selects positions of the image to be enlarged by moving the OSD window (S807a and S807b), the image display device determines whether the user inputs an "enlargement key" (S808a and S808b). As a result of determination, when the user inputs the "enlargement key", the 4: 3 or 16: 9 OSD screen is displayed on the video display device (S809a, S809b).

Subsequently, the image display apparatus executes the magnified image procedure while changing the magnification ratio according to the selection of 4: 3 or 16: 9 based on the ratio of the reference image (S810a and S810b).

Subsequently, the image display device displays the enlarged image on the image display device according to the ratio of the OSD window selected by the user (S811).

According to the image magnification method and apparatus of the image display device according to the present invention described above, it is possible to obtain the effect of enlarging the desired image while maintaining the aspect ratio of the original image regardless of the type of the image display device. Can be. In addition, an operation for enlarging a specific image is much more convenient than in the related art.

Claims (6)

An analog / digital converter for converting an input analog video signal into a digital video signal; An input format detector for detecting an aspect ratio of the analog video signal; An image processor for receiving and processing the digital image signal, and outputting the magnified image for a predetermined range of the output image, when the digital image signal for the predetermined range is enlarged to correspond to the aspect ratio of the analog image signal; , A display device for displaying an image signal output from the image processor and an enlarged image signal; When the user selects the magnification mode of the digital video signal, the input format detector detects the aspect ratio of the analog video signal, and enlarges and processes the video signal for the predetermined range corresponding to the aspect ratio. And a microprocessor for controlling the image processor to display information on an aspect ratio through the display device. delete Setting a range for a user to enlarge a specific image, and operating a input device of the image display device to display a 4: 3 or 16: 9 OSD enlargement window; If the user selects an OSD zoomed-in window, the video display device determines whether an aspect ratio of a currently input video signal is 4: 3; If the determination result is 4: 3, displaying a 4: 3 OSD screen; if the determination result is not 4: 3, displaying a 16: 9 OSD screen on the image display device; The image display device may be configured to enlarge an image signal corresponding to the range corresponding to the aspect ratio of the currently input image signal; And displaying the enlarged image on the displayed OSD screen and guiding aspect ratio information of the OSD screen. The method of claim 3, The aspect ratio of the enlarged image is variable or automatically set by a user's selection. The method of claim 3, wherein the expansion of the video signal, Converting the video signal into a digital video signal; And enlarging the digital image signal corresponding to the range to the aspect ratio of the image signal. The method of claim 3, further comprising guiding an aspect ratio of the input analog video signal when a user inputs a start key for enlarging a specific video desired by the user.