KR100697425B1 - Method and apparatus displaying picture - Google Patents

Abstract

An object of the present invention is to provide a sub-screen display method for changing the position of the sub-screen according to the resolution of the signal output to the main screen in the image display device having a multi-screen display function, and an image display device accordingly.

The image display device of the present invention includes a user interface for receiving a sub-screen display command, a signal input unit for receiving one or more image signals, a display module for displaying the image signal, and one or more image signals from the signal input unit. A video signal processor for processing the main screen and / or the sub-screen to be displayed through the module, and when the sub-screen display command is input through the user interface, sets a sub-screen display area that varies according to the resolution of the main screen, and And a controller for controlling the image signal processor to display the sub-screen on the set sub-screen display area.

PIP, subscreen, window bar

Description

Image display method and device {METHOD AND APPARATUS DISPLAYING PICTURE}

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

2 is a flowchart of a sub-screen display method according to a preferred embodiment of the present invention.

3 is a diagram showing an example of a sub-screen display according to a preferred embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

100: control unit

102: memory

104: user interface unit

106: signal input unit

108: video signal processing unit

110: video signal output unit

112: display module

The present invention relates to a video display device, and more particularly, to a sub-screen display method for varying the display position of a picture in picture (PIP) sub-screen and an image display device accordingly.

With the development of technology, video display devices can receive and process video signals from various signal sources, and PIP (Picture In Picture) which displays video signals from multiple signal sources simultaneously on one screen. Screen display function has been commercialized. The multi-screen display function displays video signals from a predetermined signal source on the main screen, and simultaneously displays video signals from other signal sources on a predetermined area of the main screen.

When the PIP function makes it possible to display video signals from a plurality of signal sources at the same time, but the main part of the main screen is not visible to the user because the sub display hides a predetermined display area of the main screen. Would be used. Accordingly, efforts have been made to change the display area of the sub-screen so as not to disturb the viewing of the main screen.

For example, “10-1996-0019052”, which was patented by the Korean Intellectual Property Office for the name of a sub-screen position converter of a multi-screen television, is used for multi-screen playback on a multi-screen television that can play a sub-screen on the main screen. When the sub screen is being played back and an operation for converting the display position of the sub screen occurs by the user's operation, the sub screen is changed by receiving a predetermined address position of the main screen from which the sub screen is to be moved. A technique of freely moving a sub-screen to an arbitrary screen position as desired by moving to a displayed address position and displaying a screen is disclosed.

According to the related art, the display area of the sub screen may be varied so as not to disturb the viewing of the main screen.

Recently, a monitor with a function of receiving and outputting a signal from an external device such as a television broadcast, a DVD, a set-top box, etc. has become popular. The monitor has a video signal received from a PC through a PIP function. A video signal (hereinafter referred to as an external signal) from a television broadcast or an external device was output as a sub picture while outputting a PC signal) as a main picture.

In general, a PC adopts an operating system of Windows, and the Windows provides a user with various information, visual information, active program identification information, and the like through a window bar.

As such, the PC displays a window bar that provides the user with information related to the current PC operation on a predetermined portion of the screen, and the window bar may be covered by a sub-screen that outputs the external signal.

In this case, the user adjusts the window bar so that the window bar is not covered by the sub-screen outputting the external signal while changing the position of the sub-screen by manual operation. Changing the position of the screen individually was very cumbersome.

In addition, since the display area of the window bar is changed according to the resolution of the PC signal, even if the position of the sub-screen is set in consideration of the size of the window bar, if the resolution of the PC signal is changed, the sub-screen is displayed again. The problem was that the window bars were hidden.

Therefore, when the PC signal is the main screen, it is urgently needed to develop a technology for changing the position of the sub screen in consideration of the display position of the window bar according to the resolution of the PC signal.

The present invention is to overcome the above-described problems, a sub-screen display method for changing the position of the sub-screen according to the type of the signal output to the main screen in the image display device having a multi-screen display function and the image according It is an object to provide a display device.

In addition, another object of the present invention is to provide a sub-screen display method for changing the position of the sub-screen according to the resolution of the signal output to the main screen in the image display device having a multi-screen display function and the image display device accordingly.

The video display device of the present invention to achieve the above object and to solve the problems of the prior art, a user interface for receiving a sub-screen display command, a signal input unit for receiving one or more video signals, a display module for displaying the video signal, An image signal processing unit for processing one or more image signals from the signal input unit to be displayed on the main screen and / or the sub screen through the display module; when the sub screen display command is input through the user interface, And a control unit configured to set a sub-screen display area that is variable according to the control, and to control the image signal processor to display the sub-screen on the set sub-screen display area.

According to the present invention, the position of a sub-screen is changed according to the type and resolution of a signal output to the main screen in an image display device having a multi-screen display function.

A configuration of an image display apparatus to which the present invention is applicable will be described with reference to FIG. 1.

The controller 100 not only controls the image display device as a whole, but also displays the PC signal on the main screen while displaying other external signals on the sub-screen according to a preferred embodiment of the present invention. By changing the display position of the subscreen so as to be spaced apart by the display size of, the window bar is not covered by the subscreen. The display size of the window bar uses a table that maps display positions of resolutions of the PC signal, a method of calculating the display size of the window bar according to the resolution of the PC signal, or an image processing process. You can use a method to detect window bar images.

The memory unit 102 stores various information including a processing program of the controller 100, and in particular, stores window bar size information for calculating the display size of the window bar, resolution information of the display module 112, or resolution. Stores a table that maps each display position, or stores a reference image for window bar image detection.

The user interface 104 includes keys for receiving various commands from the user, and provides a signal to the controller 100 according to a user's key input.

The signal input unit 106 receives various video signals including PC signals and provides them to the video signal processor 108. In particular, the signal input unit 106 may receive an external signal from various external devices such as a television broadcast signal, a DVD playback signal, an output signal of the set-top box.

The video signal processing unit 108 receives one or more video signals through the signal input unit 106 under the control of the control unit 100 and displays the main screen or the main screen and the sub-screen, and the display position of the sub-screen. Is determined according to the control of the controller 100.

The video signal output unit 110 processes the video signal provided by the video signal processor 108 and outputs the processed video signal through the display module 112.

A preferred embodiment of the present invention applicable to the image display apparatus will now be described with reference to the flowchart of FIG. 2.

The controller 100 checks whether the user commands PIP execution through the user interface 104 (step 200). When the execution of the PIP is commanded, the controller 100 checks whether a signal currently displayed on the main screen is a PC signal (step 204).

If the signal displayed on the main screen is a PC signal, the controller 100 detects the resolution of the PC signal (step 206). The control unit 100 detects the vertical resolution of the PC signal based on the vertical synchronization signal of the PC signal received through the signal input unit 106.

When the vertical resolution of the PC signal is detected, the controller 100 calculates the display size of the window bar on the display module according to Equation 1.

Window bar display size (A) on display module = (vertical resolution of display module / vertical resolution of PC signal) x window bar display size on PC signal

In Equation 1, “(vertical resolution of the display module / vertical resolution of the PC signal)” corresponds to the main screen length on the display module, and “window bar display size on the PC signal” is the vertical length of the window bar on the PC signal. Corresponding to, for example, has a value of 32 (number of pixels). That is, Equation 1 shows the vertical length of the window bar displayed on the main screen.

Alternatively, the controller 100 may read out the window bar display size corresponding to the vertical resolution of the PC signal from a table in which the window bar display sizes for the vertical resolutions stored in the memory unit 102 are mapped.

When the window bar display size is calculated according to Equation 1 or the window bar display size is read from the table stored in the memory 102 (step 208), the controller 100 displays the window bar display size at the edge of the main screen. The display position of the sub-screen is varied to be spaced apart, and the sub-screen is displayed at the display position of the variable sub-screen (step 210).

In operation 204, if the signal output to the main screen is not a PC signal, the control unit 100 displays the sub-screen at a preset position (step 212).

3 illustrates an example in which the sub-screen is displayed spaced apart by the window bar display size, and the sub-screen is positioned away from the vertical edge of the main screen by the window bar display size A. FIG.

Since the window bar can be moved to the top, bottom, left, and right edges according to a user's request, the sub screen is positioned to be spaced apart from the top, bottom, left, and right edges of the window bar by the window bar display size (A '). It can be hidden by the subscreen.

The window bar display size A 'is shown in FIG. 3, which is calculated similarly to Equation 1, using a horizontal resolution instead of a vertical resolution, and a window bar display size using a horizontal length rather than a vertical length. Equation 1 is modified in that it means.

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In the present invention, the position of the sub-screen is changed according to the type of the signal output to the main screen in the image display device having a multi-screen display function.

In the above-described preferred embodiment of the present invention shown in FIG. 2, only the calculation of the window bar display size or the reading of the window bar display size from the table is illustrated. However, the image processing directly detects a specific image of the window bar. The scheme may be employed.

In this case, as shown in FIG. 3, since the end portion of the general window bar is composed of a solid line from the left edge to the right edge, it detects the solid line connected from the left edge to the right edge starting from the bottom edge of the screen. This can detect the display position of the window bar.

As described above, a method of detecting a specific image of the main screen by the image processing method enables detection of not only a window bar but also a subtitle area, so that the subtitle is not covered when an image including a subtitle is output to the main screen. You can make subscreens appear on the screen.

Embodiments of the present invention described above include a computer readable medium including program instructions for performing various computer-implemented operations. The computer readable medium may include a program command, a data file, a data structure, etc. alone or in combination. The program instructions on the media may be those specially designed and constructed for the purposes of the present invention, or they may be of the kind well-known and available to those having skill in the computer software arts. Such computer-readable recording media include magnetic media such as hard disks, floppy disks, and magnetic tape, optical media such as CD-ROMs, DVDs, and floppy disks. Magneto-optical media, and ROM, RAM, flash memory, and the like may be employed, and may include hardware devices specifically configured to store and execute program instructions. The medium may also be a transmission medium such as an optical or metal wire, a waveguide, or the like including a carrier wave for transmitting a signal specifying a program command, a data structure, or the like. The program instructions include not only machine code generated by a compiler, but also high-level language code executable by a computer using an interpreter or the like.

As described above, the present invention can prevent the important image output to the main screen from being obscured by changing the position of the sub screen according to the resolution of the signal output to the main screen in the image display device having the multi-screen display function. In addition, there is an advantage that can satisfy the various needs of the user as well as double the convenience of use.

As described above, the present invention has been described by way of limited embodiments and drawings, but the present invention is not limited to the above-described embodiments, which can be variously modified and modified by those skilled in the art to which the present invention pertains. Modifications are possible.

Therefore, the spirit of the present invention should be grasped only by the claims described below, and all equivalent or equivalent modifications thereof will belong to the scope of the present invention.

Claims (5)

In the video display device, A user interface for receiving a sub-screen display command; A signal input unit receiving one or more video signals; A display module for displaying the video signal; An image signal processor configured to process one or more image signals from the signal input unit to be displayed on a main screen and / or a sub screen through the display module; And When the sub-screen display command is input through the user interface, a control unit for setting a sub-screen display area that is variable according to the resolution of the main screen, and controls the image signal processing unit to display the sub-screen on the set sub-screen display area And an image display device comprising:. The method of claim 1, The control unit reads the sub-screen display area from a table in which the display areas of the sub-screens for each resolution are mapped, or multiplies the display size of the window bar on the PC signal by at least a value obtained by dividing the resolution of the display module by the resolution of the PC signal. And displaying the image at a distance from the edge of the screen by the calculated value. In the image display method, A first step of receiving a sub-screen display command; Setting a sub-screen display area that is variable according to a resolution of a display module when the sub-screen display command is input; And displaying a sub screen on the set sub screen display area. The method of claim 3, The sub-screen display area is read from a table in which display areas of sub-screens for each resolution are mapped, or a value calculated by multiplying the display size of the window bar on the PC signal by at least the resolution of the display module divided by the resolution of the PC signal. The image display method characterized in that the set so as to be spaced apart from the edge of the screen. delete

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