KR20090083517A - Display device and method for controlling display position - Google Patents

Abstract

A display device and a method for controlling a display position are provided to re-perform location control based on standard image data for controlling a position when the position control of image data is not normally performed. A controller determines whether resolution of image data is resolution in which position control is not performed(S110). The controller determines whether the position control is normally performed(S130). The controller performs position control of image data while storing a position control performing result values(S140). The controller transmits an output request signal of standard image data for controlling the display position by a host(S150). The controller re-performs display position control based on the standard image data(S160). The controller stores a result value according to the re-performed display position control and controls a position of the image data(S170).

Description

Display device and method for controlling display position}

The present invention relates to a display apparatus, and more particularly, to a display apparatus having a function of automatically adjusting a display position of an image displayed on a screen, and a method of adjusting the screen position thereof.

In general, a display device includes a liquid crystal display (LCD) device, a plasma display device, and the like, and the display device is a system device of a personal computer system, which is considered a host. It receives and displays video signals and synchronous signals from a system unit.

In such a display device, a case in which the displayed image does not match on the screen may occur.

For example, as shown in FIG. 1, a case in which an image is moved to the right and a bottom of the screen may occur, and a case in which the image is moved to the left and upper sides may also occur.

The cause of such a phenomenon may be caused by a change in resolution of a video signal provided from a host, or may be caused by a time difference between synchronization signals.

Therefore, in the recent display apparatus, when the input mode is changed or set by the image data provided from the host, that is, the RGB input, the additional information of the input image data is obtained. Accordingly, the obtained additional information, that is, horizontal sync and vertical sync, is obtained. It provides a function to automatically adjust the display position of the image data by using information such as H_Total, V_Total.

That is, the screen position adjusting method of the existing display apparatus, as shown in FIG. Judgment (S10 ~ S20).

Subsequently, when the resolution of the input image data is a resolution at which the position is not adjusted, the determination result (S20) is performed based on the additional information of the image data (S30).

In operation S40, it is determined whether the position adjustment of the image data is successfully performed.

Subsequently, when the position adjustment is successfully performed, the determination result (S40) stores the result value according to the position adjustment and applies the stored result value to perform the screen position adjustment of the image data (S50).

In addition, if the position adjustment is not successfully performed (success) (S40), a default value is stored, and the screen position of the image data is adjusted by applying the stored default value. (S60).

However, the screen position performing method according to the related art does not perform the position adjustment normally or fails when the image data provided from the host is image data that is not appropriate to perform the screen position adjustment. The phenomenon that the display position of the image data is not properly adjusted occurs.

That is, when the position adjustment is performed in a state where a dos and an unusual desktop which is difficult to perform normal position adjustment are displayed, the image data input from the host because the position is not properly aligned or the position adjustment is not normally performed There is a problem that a phenomenon occurs that the display position of the does not match.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and when the position adjustment of the input image data is not normally performed, the position adjustment can be performed again on the basis of the standard image data for performing the position adjustment. The purpose is.

In addition, another object of the present invention is to provide an optimal image quality to a user by adjusting the position of a display screen based on standard image data.

According to an aspect of the present invention, there is provided a display apparatus comprising: an image receiving unit configured to receive image data provided from a host and to display the image data provided from the host; An image processor which processes the image data received through the image receiver to display the image data; A display unit configured to display image data processed through the image processor; And a controller which performs screen position adjustment based on the resolution of the image data provided from the host, checks the result of the screen position adjustment and feeds back to the host.

In addition, the screen position adjustment method of the display device according to the present invention, the screen position adjustment method of the display device for displaying the image data provided from the host, comprising: determining the resolution of the image data provided from the host; Performing screen position adjustment of the image data according to the determined resolution; And checking feedback of the performed screen position adjustment result and feeding back to the host.

In the display device and the screen position adjusting method according to the present invention, if the screen position adjustment is not normally performed based on the currently input image data, the display screen is generated due to a positioning error by performing the screen position adjustment on the basis of the standard image data. It is possible to provide a more optimal image quality to the user by improving the phenomenon that the position of the.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the accompanying 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.

3 is a diagram illustrating a configuration of a display apparatus according to the present invention, and FIG. 4 is a flowchart for explaining a screen position adjusting method of the display apparatus according to the present invention step by step.

In general, the display system according to the present invention includes a host (PC) 100 for providing RGB image data, and a display device 200 for receiving and displaying image data provided from the host 100.

The host 100 determines the state of the display apparatus 200 and provides image data according to the determined state.

In order to determine the state of the display apparatus 200, the host 100 receives characteristic information of the display apparatus through a predetermined communication line, and thus provides the image data to the display apparatus 200.

In this case, the communication line is a DDC-CI (Display Data Channel-Common interface; DDC-CI) line.

In general, DDC (Display Data Channel) is a communication channel between a display device and a PC, which is considered a HOST, and is defined by the Video Electronic Standards Association (VESA), a non-profit corporation formed between US computer and peripheral companies. Protocol.

That is, the DDC transmission method defines a communication channel between a computer and a display device, and transmits display characteristic information (for example, EDID, etc.) stored in the display device to the computer or changes the display device information using a keyboard or a mouse. Speak protocol for.

Ultimately, the DDC-Ci (Display Data Channel-Common interface) allows the user to control the screen setting of the display device by using a specific application software installed on the computer without any manipulation of the display device. ) Protocol.

The display apparatus 200 is an image receiving unit 210 for receiving the image data provided from the host 100, and an image processing unit 220 for signal processing to display the image data received through the image receiving unit 210 ), A display unit 230 for displaying image data processed through the image processor 220, and a screen position adjustment based on the resolution of the image data provided from the host 100. And a control unit 240 for checking the result of the adjustment and feeding it back to the host 100, and a memory unit 250 for storing the result value according to the performed screen position adjustment.

Referring to the operation of the display device configured as described above is as follows.

First, when the current input mode is the RGB input mode or the preset input mode is changed to the RGB input mode, the controller 240 checks the resolution of the image data provided from the host 100.

If the checked resolution is a resolution at which position adjustment has been previously performed, the corresponding position adjustment value previously stored in the memory unit 250 is read, and the read position adjustment value is applied and provided from the host 100. Adjust the display position of the image data to be displayed.

Here, the controller 240 adjusts the screen position based on the image data provided from the provided host 100 when the checked resolution is a resolution at which the position adjustment has not been previously performed.

That is, screen position adjustment is performed such that an intermediate point of the image data is positioned on the display intermediate screen of the display unit 230 by using information such as horizontal sync, vertical sync, H_Total, and V_Total of the provided image data.

Since the method for performing the screen position adjustment is already known in the art to which the present invention belongs, a detailed description thereof will be omitted.

At this time, the controller 240 checks the result of the screen position adjustment and feeds back corresponding result information to the host 100.

That is, if the screen position adjustment is normally performed, the corresponding position adjustment result value is stored and applied to the memory unit 250. If the screen position adjustment is abnormally performed, the result information is re-executed to perform the screen position adjustment again. Feeds back to the host 100.

Here, the corresponding result information may be executed only when the screen position adjustment is abnormally performed, and may be performed irrespective of the result of the position adjustment, but is preferably performed only when the abnormally performed.

In addition, the information fed back to the host 100 is a standard image data output request signal for performing screen position adjustment in the display apparatus 200, and the host 100 receives the pre-stored standard image data according to the request signal. The display device 200 is provided.

The standard image data is a normal screen for normally performing the screen position adjustment, and may be all data except data that is difficult to normally perform the screen position adjustment, such as a DOS screen and an unusual desktop.

Accordingly, the controller 240 performs the screen position adjustment on the basis of the standard image data provided from the host 100, and accordingly the corresponding result value according to the result of the screen position adjustment is performed in the memory unit 250. Store in

In addition, even when the screen position adjustment is abnormally performed, the controller 240 adjusts the screen position of the image data based on a preset default value.

As described above, if the screen position adjustment is not normally performed on the basis of the currently input image data, the display apparatus re-executes the screen position adjustment with standard image data, thereby changing the position of the display screen caused by the position adjustment error. The phenomenon may be improved to provide a user with more optimal image quality.

The screen position adjusting method of the display apparatus according to the present invention configured as described above first changes to the RGB input or RGB output mode as shown in FIG. 4 (S100).

Subsequently, it is determined whether or not the resolution of the input image data according to the mode change is a resolution without performing position adjustment (S110).

If the resolution of the input image data is the resolution at which the position adjustment is not performed, the position adjustment of the image data is performed based on the additional information of the input image data. That is, the position adjustment is performed using information such as horizontal sync, vertical sync, H_Total, V_Total, etc. of the provided image data.

Next, it is determined whether the position adjustment is normally performed (S130).

In addition, when the position adjustment of the image data is normally performed, the determination result (S130) stores the position adjustment result value and applies the corresponding value to adjust the position of the input image data (S140). .

Subsequently, when the position adjustment of the image data is abnormally performed, the determination result (S130) feeds back corresponding result information according to the screen position adjustment to the host 100 (S150). That is, the host 100 transmits an output request signal of standard image data for adjusting the screen position.

The screen position adjustment is performed again based on the standard image data provided according to the transmitted output request signal (S160).

Subsequently, the result value according to the re-executed screen position adjustment is stored, and the position of the provided image data is adjusted by applying the stored result value (S170).

As described above, in the display apparatus and the screen position adjusting method according to the present invention, if the screen position adjustment is not normally performed based on the currently input image data, the screen position adjustment is performed again with the standard image data. The position of the display screen may be distorted to provide a more optimal image quality to the user.

1 is a diagram illustrating a case in which an image is moved in a specific direction of a screen.

2 is a flowchart illustrating a step-by-step method of adjusting a screen position of a display device according to the related art.

3 is a view showing the configuration of a display device according to the present invention.

4 is a flowchart illustrating a step-by-step method of adjusting a screen position of a display device according to the present invention.

<< Explanation of symbols for main part of drawing >>

100: host (PC)

200: display device

210: image receiving unit 220: image processing unit

230: display unit 240: control unit

250: memory

Claims (8)

In the display device for receiving and displaying the image data provided from the host (Host), An image receiver configured to receive image data provided from the host; An image processor which processes the image data received through the image receiver to display the image data; A display unit configured to display image data processed through the image processor; And, And a controller which performs screen position adjustment according to the resolution of the image data provided from the host, checks the result of the screen position adjustment, and feeds back to the host. The method of claim 1, And the control unit feeds back the screen position adjustment result to the host through the preset communication line when the screen position adjustment is abnormally performed. The method of claim 1, And the controller is configured to redo the screen position adjustment based on the standard image data provided as a result of feeding back the screen position adjustment result to the host. The method of claim 3, wherein And a memory unit for storing a result value according to the screen position adjustment. In the screen position adjustment method of the display apparatus for displaying the image data provided from the host, Determining a resolution of image data provided from the host; Performing screen position adjustment of the image data according to the determined resolution; And, And checking the result of the screen position adjustment result and feeding it back to the host. The method of claim 5, Feedback to the host is And transmitting the standard image data output request signal for performing the screen position adjustment to the host when the screen position adjustment is abnormally performed. The method of claim 6, And performing the screen position adjustment on the basis of the standard image data provided from the host according to the abnormally performing the screen position adjustment. The method of claim 7, wherein And storing and applying a result value according to the screen position adjustment performed.

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