KR101534019B1 - Display apparatus and control method thereof - Google Patents

Abstract

A display device according to an embodiment of the present invention includes a pattern image generator for generating a test image of a specific figure pattern; An image signal processing unit for signal processing a test image of the generated specific pattern pattern according to a predetermined resolution and analyzing the signal processed image to obtain state information of a figure existing in the test image; A memory unit for storing reference state information of a figure existing in a test image for each resolution; And a controller for comparing the acquired state information of the graphic object with the reference state information stored in the memory to determine whether to change the set resolution.

Resolution, size, location

Description

[0001] The present invention relates to a display apparatus and a control method thereof,

The present invention relates to a display device, and more particularly, to a display device and a control method thereof that can improve a problem that a screen size is abnormally set due to a compatibility problem between a PC and a monitor.

2. Description of the Related Art Generally, a display device is a display device that receives a signal from a specific source and separates the signal into a voice and an image, outputs the voice and image through a screen and a speaker, and typically includes a TV and a monitor.

The monitor is a device for displaying a video signal of a predetermined format transmitted from a video card of a PC, which is a connected host, on a screen through a series of signal processing such as digital sampling scaling.

This is a typical flat panel display device suitable for a large-sized monitor according to the tendency of the display device to be enlarged according to the development of modern technology starting from a small-sized monitor using a cathode ray tube. As the display technology develops, Excellent digital LCD monitors are being commercialized.

In addition, display characteristic information (EDID) as display processing capability information is stored in the monitor, and the PC automatically sets a resolution for image output based on the EDID information of the monitor.

However, when there is data (compatibility problem, drive update problem) that can not correspond to the EDID information stored in the monitor, normal resolution is not set, thereby setting the screen size to be large or small.

In order to solve the above problem, the driver of the video card needs to be updated. If the manufacturer of the video card does not modify the drive, the user has to wait until the drive of the video card is updated.

In addition, the automatic adjustment function of a general monitor is a function that is supported only by a D-Sub interface, which is an analog video signal, and has a problem in that resolution can not be set abnormally for a digital signal such as DVI or HDMI.

In the embodiment of the present invention, the position and size of the output image can be automatically compensated by sensing whether the input image is output at an abnormal position and size.

A display device according to an embodiment of the present invention includes a pattern image generator for generating a test image of a specific figure pattern; An image signal processing unit for signal processing a test image of the generated specific pattern pattern according to a predetermined resolution and analyzing the signal processed image to obtain state information of a figure existing in the test image; A memory unit for storing reference state information of a figure existing in a test image for each resolution; And a controller for comparing the acquired state information of the graphic object with the reference state information stored in the memory to determine whether to change the set resolution.

According to another aspect of the present invention, there is provided a method of controlling a display device, comprising: processing a test image of a specific graphic pattern to be generated according to a preset resolution; Analyzing the signal-processed test image and obtaining status information of a figure existing in the test image; And changing a predetermined resolution based on the acquired state information of the graphic form.

The display device and the control method thereof according to the embodiment of the present invention can automatically provide an image with abnormally outputted images to thereby provide a user with an image of optimal image quality and can improve user satisfaction .

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings. It should be understood, however, that there is no intention to limit the scope of the present invention to the embodiment shown, and that other embodiments falling within the scope of the present invention may be easily devised by adding, Can be proposed.

Although the terms used in the present invention are selected as general terms that are widely used at present, there are some terms selected by the applicant in specific cases. In this case, since the meaning is described in detail in the description of the present invention, It is to be understood that the present invention should be grasped as a meaning of a non-term.

2 is a view for explaining a test image according to an embodiment of the present invention. FIG. 3 is a block diagram of a display device according to an embodiment of the present invention. FIG. 2 is a flowchart for explaining the control method of FIG.

1, a display apparatus according to an embodiment of the present invention includes a display unit 10 for displaying an image, a pattern image generator 20 for generating a test image of a specific figure pattern, An image signal processing unit 30 for signal processing the test image of the generated specific graphic pattern according to the resolution and analyzing the signal processed image to obtain state information of a graphic object existing in the test image, A controller 50 for comparing the state information of the obtained figure with the reference state information stored in the memory and compensating for the size and position of the output image, .

The operation of the display device according to the embodiment of the present invention will now be described.

First, the pattern image generator 20 generates a test image of a previously stored specific pattern pattern.

At this time, the test image of the specific figure pattern may be generated when the automatic image adjustment command is inputted from the user, and may be selectively generated according to the case where the current input mode is changed or the input signal is changed.

The image signal processing unit 30 processes the test image of the specific graphic pattern generated from the pattern image generating unit 20 and analyzes the signal processed image signal to obtain state information of the graphic image existing in the test image do.

Here, the state information of the figure refers to coordinate information in which the figure is located in the signal-processed test image and size information of the figure.

That is, as shown in FIG. 2, at least one graphic object exists in the generated test image.

At this time, it is preferable that a plurality of graphics are present in the test image.

That is, a graphic form existing in the test image may cause a shift phenomenon in which the output image is shifted in one direction due to a resolution error setting of the signal-processed image, or a problem occurs in the screen size, And plays a role of capturing the center point of the image when it occurs.

Accordingly, when the output image is completely deviated in one direction, there is a problem that it is difficult to normally hold the center point of the image if only one specific graphic exists in the test image. Therefore, It is preferable to arrange a plurality of graphics.

In other words, as shown in FIG. 2, the first figure 110, the second figure 120, and the third figure 130 exist in the generated test image 100.

Here, it is described in the embodiment of the present invention that there are three graphics on the test image. However, it should be understood by those skilled in the art to which the present invention belongs that there can be various numbers of graphics, such as 2, 4, It will be self-evident.

At this time, size information and coordinate information of the graphic object exist in each graphic object existing in the test image.

Here, the size information is information indicating the size of each figure, and the coordinate information is center coordinate information indicating a position of the figure.

The size and position of each figure existing in the test image are fixed, but the size and position of each figure change according to the resolution of the panel on which the test image is displayed.

Accordingly, the memory unit 50 stores the reference size and reference position information of each graphic existing in the test image for each resolution.

In other words, when the test image is normally displayed according to the currently set resolution, the size and position information of each figure are stored in the memory unit 50.

The image signal processor 30 analyzes the signal-processed test image to determine the size and position of each figure existing in the test image. Here, the method of determining the size and position of each figure is as follows. Use the Pixel Grab function.

Here, the Pixel Grab function refers to a method of grasping the position and size of each figure by grasping the level of the corresponding image for each pixel.

In other words, at the beginning of the test image, the position of the black level is detected while increasing the number of pixels by one step according to Hsync.

That is, since only the region where the graphic object is located in the test image is composed of the black level, the corresponding level is determined for each pixel of the test image.

At this time, first, the pixel is incremented by one step in the horizontal direction, and the start position where the black level is detected is determined. When the start position where the black level is detected is detected, the black level is detected It detects the ending position which is not.

The horizontal size of the figure is detected based on the detected start position and the horizontal position, and the center coordinate value of the figure is detected based on the start position and the end position.

Also, vertical direction size information is sensed based on the center coordinate value of the detected figure.

At this time, since the position and the size of the graphic object positioned in the test image are changed according to the predetermined resolution, the graphic object displays information indicating the corresponding graphic object in each graphic object so that the detected graphic object is a graphic object of the plurality of graphic objects So that it can be grasped clearly.

The control unit 50 receives the size and position information of the graphic object acquired through the video signal processing unit 30 and stores the size and position information of the graphic object received and the position information And compares the reference size information and reference position information of each figure to change the currently set resolution. Here, the reference size information and the reference position information of each figure refer to information corresponding to the currently applied resolution.

In other words, when the resolution of the current output image is normally set, the size and position information of the obtained figure and the reference size information and reference position information of the figure coincide with each other.

Accordingly, the controller 50 compares the size and position information of the figure with the reference size information and reference position information of the figure, and compensates the size and position of the output image according to the comparison result.

In other words, the controller 50 compares the size information of the obtained figure with the reference size information, and when the two pieces of information do not match, the controller 50 determines that the size of the obtained figure matches the reference size, Change the size.

The control unit 50 compares the acquired position information of the figure and the reference position information, and when the two pieces of information do not coincide with each other, Adjust the position.

Accordingly, when an abnormal image is output due to the resolution error setting, the test image is generated, and the size and position of the output image are adjusted based on the graphic form existing in the test image, .

As shown in FIG. 3, the method of controlling a display device according to an exemplary embodiment of the present invention generates a test image (S10).

Then, the generated test image is signal-processed according to a predetermined resolution (S20).

Then, the signal processed test image is analyzed (S30). That is, the test image is analyzed using the Pixel grab function.

Then, the start and end coordinate information of the section in which the black level is detected from the test image is detected (S40).

Subsequently, size information and coordinate information of a figure existing in the test image are acquired based on the detected start and end coordinate information (S50).

Then, the reference size information and the reference coordinate information of the figure corresponding to the currently set resolution are extracted (S60).

Then, it is determined whether the size information of the obtained figure matches the reference size information of the extracted figure (S70).

If the size information of the obtained figure does not match the reference size information of the extracted figure, the size of the output image is adjusted such that the size of the obtained figure matches the reference size of the extracted figure (S70) (S80).

Then, it is determined whether or not the coordinate information of the obtained figure is identical to the reference coordinate information of the extracted figure (S90).

If it is determined that the coordinate information of the figure is not identical to the reference coordinate information of the extracted figure, the position of the output image is adjusted so that the coordinates of the obtained figure are located in the reference coordinates of the extracted figure (S100).

As described above, the control method of the display apparatus according to the embodiment of the present invention can automatically provide an image that is abnormally output, thereby providing a user with an image of optimal image quality, and can improve user satisfaction.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a view showing a configuration of a display device according to an embodiment of the present invention; Fig.

2 is a view for explaining a test image according to an embodiment of the present invention;

FIG. 3 is a flowchart illustrating a method of controlling a display device according to an exemplary embodiment of the present invention.

DESCRIPTION OF THE REFERENCE NUMERALS

10: Display unit 20: Test image generator

30: video signal processing unit 40: memory unit

50:

Claims (9)

A pattern image generator for generating a test image including a plurality of specific figure patterns; And outputting a test image including the generated plurality of specific figure patterns according to a preset resolution and outputting a video signal for obtaining status information including position information and size information of the plurality of specific figure patterns from the output test image, A processor; A memory unit for storing reference state information of a figure pattern included in a test image for each resolution; And And a control unit for comparing the state information of the obtained plurality of specific figure patterns with the reference state information stored in the memory and adjusting the size and position of the output image based on the reference state information when the comparison result does not match Display device. The method according to claim 1, The image signal processing unit obtains state information including the position information and the size information based on the image level of the plurality of specific figure patterns Display device. The method according to claim 1, The image signal processing unit may determine the position where the black level is detected while increasing the pixels of the output test image in the vertical direction and the horizontal direction by one step, and determine status information of the plurality of specific figure patterns based on the determined position Acquire Display device. delete Generating a test image including a plurality of specific figure patterns; Outputting a test image including the generated plurality of specific figure patterns according to a predetermined resolution; Obtaining status information including position information and size information of the plurality of specific graphic pattern from the output test image; Comparing state information of the plurality of specific figure patterns with pre-stored reference state information; And And adjusting the size and position of the output image based on the reference state information if the comparison result does not match A method of controlling a display device. 6. The method of claim 5, And storing the reference state information of the specific figure pattern existing in the test image according to the resolution. 6. The method of claim 5, The step of obtaining status information from the output test image And obtaining state information based on the image level of the plurality of specific figure patterns A method of controlling a display device. 8. The method of claim 7, The step of acquiring the state information of the plurality of specific figure patterns Detecting a start position and an end position at which a black level is sensed by incrementing a pixel of the output test image by one step in a vertical direction and a horizontal direction; And obtaining positional information and size information of the plurality of specific figure patterns using the detected start position and end position A method of controlling a display device. 8. The method of claim 7, The step of adjusting the size and position of the output image Adjusting the position of the output image so that the position of the obtained plurality of specific graphic patterns is equal to the position of the reference state information; And adjusting the size of the output image so that the size of the plurality of specific figure patterns is equal to the size of the reference state information A method of controlling a display device.

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