KR100646877B1 - Display apparatus and method for eliminating afterimage - Google Patents

Abstract

The present invention is to minimize the deterioration of the image quality of the image display device due to the afterimage, and to effectively eliminate the afterimage.

That is, the image display device according to the present invention includes an image receiving unit to which an image signal is input from the outside, the size of the afterimage removal region, the afterimage removal region, and the execution cycle of the afterimage removal function for the entire screen or the screen portion according to a user's request; A key input unit for selecting an afterimage removal method, and an on-screen display menu for setting a desired afterimage removal method through the key input unit are controlled to be displayed, and the corresponding afterimage removal function is set according to the afterimage removal method set by the user. The control unit to perform the control, the image processing unit for decoding the video signal input through the image receiving unit according to the control signal of the control unit to generate a residual image removal signal, and converts the signal output from the image processing unit to be displayed on the screen A scaler configured to display an image processed by the scaler It is configured to include a display portion which is.

Therefore, the present invention can not only remove the low quality image due to the afterimage by executing the afterimage removal function for the area set by the user and additionally performing the afterimage removal function for the entire screen area and the automatically detected area. There is an effect that can extend the life of the video display device more.

Afterimage, remove

Description

Image display device and screen afterimage removal method {DISPLAY APPARATUS AND METHOD FOR ELIMINATING AFTERIMAGE}

1 to 3 are diagrams illustrating a conventional afterimage removal method.

4 is a diagram illustrating an image display device according to the present invention;

5 and 6 illustrate exemplary embodiments of an afterimage removing function provided in an image display device of the present invention.

7 is a view for explaining the principle that the afterimage removal function is implemented for the area set in the image display device of the present invention.

8 and 9 illustrate a method of setting an area for removing an afterimage on a display screen.

10 to 12 are diagrams for setting a screen afterimage removal method.

13 is a view for explaining the afterimage removal method according to the present invention.

<Explanation of symbols for main parts of drawing>

10; Image receiver 11; Image processor

12; Scaler 13; Display part

14; Control unit 15; Key input

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image display device and a method of removing an afterimage, and more particularly, to an image display device and an image display device capable of minimizing deterioration of image quality of an image display device due to an afterimage and effectively removing the afterimage.

As an example of an image display device, a plasma display panel (PDP) has recently been in the spotlight by consumers in that a thin screen and a wide screen can be realized.

In addition, the liquid crystal display (LCD: LIQUID CRISTAL DISPLAY) has a lot of development potential in that the thin film display device can be implemented.

All the research has been focused on faithfully reproducing a signal transmitted from a broadcasting station or a stored broadcast.

However, when the still image continues, afterimages occur. In particular, in the case of the plasma display panel, phosphors on the partition walls of the cell are worn out, resulting in an afterimage between the bright and dark portions, and thus the quality of the video displayed after the still image. There was a problem of significantly reducing the problem.

As an image removal method for solving such a problem, methods such as the OBITER method, the WHITE WASH method, the INVERSION method, and the pixel movement method have been proposed.

First, as shown in FIG. 1, the OBITER is a method in which a scaler moves and adjusts the position and size of a displayed screen to remove afterimages of the screen.

However, OBITER has a problem in that eye fatigue is increased when the user views the screen at the time when the screen moves.

As another method, the WHITE WASH method as shown in FIG. 2 has been proposed.

The WHITE WASH method is a method of displaying full white on the entire area of the displayed screen, and there is a problem in that a normal screen cannot be seen when the WHITE WASH method is used while the screen is displayed.

As another method, the INVERSION method is proposed.

The INVERSION method displays a color opposite to the displayed screen, and there is a problem in that a correct image cannot be viewed because a normal color is not displayed.

As another method, a pixel shifting method has been proposed.

The pixel shift method removes afterimages by creating a small OSD screen about one pixel size and moving the image on the screen.

The main method is to create an OSD screen with white color that is effective for removing afterimages, and scan it on the screen.

In the above method of removing afterimages, the OBITER method can bring dizziness to the user, and the WHITE WASH method and the INVERSION method spray white color on the entire screen or invert R, G, B values of the output color. There is a problem that the correct image cannot be viewed while the afterimage removal function is performed because the afterimage is removed.

In particular, performing the afterimage removal on the entire screen to partially remove the afterimage causes an inefficient problem.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object thereof is to provide a method for removing a screen afterimage that can effectively remove the deterioration of image quality caused by an afterimage generated during a display process.

In addition, an object of the present invention is to provide a method for removing an afterimage that can minimize the effect on the display screen in removing the afterimage of the screen and prevent dizziness in the user.

Another object of the present invention is to provide an image display device which effectively removes an afterimage generated on a screen.

In order to achieve the above object, an image display device according to the present invention includes an image receiving unit to which an image signal is input from the outside, and an afterimage removing area, an afterimage removing area, and an afterimage removal for an entire screen or a screen part according to a user's request. A key input unit for selecting an afterimage removal method such as an execution cycle of a function, and controlling an on-screen display menu for setting a desired afterimage removal method through the key input unit, and controlling the afterimage removal method set by the user. A control unit for controlling the afterimage removal function to be performed, an image processing unit for generating an afterimage removing signal by decoding an image signal input through the image receiving unit according to the control signal of the control unit, and a signal output from the image processing unit. A scaler that converts to be displayed on the screen, and the scale Comprising a display unit for displaying an image processed by the feature that there is there.

In accordance with an aspect of the present invention, an afterimage removal method according to the present invention sets an area such that an afterimage removal is performed on only one of a full screen and a partial screen for a full screen or a partial screen, or a full screen and Setting a partial screen to perform afterimage removal, or setting an afterimage removal region to automatically detect an afterimage removal region in the set state so that the afterimage removal region can be performed simultaneously, and setting a method of removing an afterimage of the set region And a step of setting an execution cycle of the set afterimage removal method, and executing the afterimage removal function by the setting.

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Preferably, the afterimage removal is set and operated separately for the full screen and the partial screen, respectively.

More preferably, the afterimage removal method may be provided so that at least one or more of the WHITE WASH method, the INVERSION method, the ORBITER method, and the pixel movement method are selectable.

More preferably, the execution cycle of the afterimage removal function is set to be the same or different for the full screen and the partial screen.

More preferably, the afterimage removal function on the partial screen may be performed together with an automatic afterimage removal function according to a user's selection.

More preferably, the setting of the afterimage removing region is a setting of the size and position of the region using the remote control unit.

Hereinafter, an image display device and an afterimage removing method according to the present invention will be described in detail with reference to the accompanying drawings.

4 is a diagram illustrating an image display device according to the present invention.

Referring to FIG. 4, the image display device according to the present invention includes an image receiving unit 10, an image processing unit 11, a scaler 12, a display unit 13, a control unit 14, and a key input unit 15. .

The image receiver 10 receives an image from a satellite, a cable, a terrestrial wave, a storage device, a set top box, a DVD, and the like, and the image processor 11 decodes the received image and displays a signal. Convert to

The scaler 12 converts an image according to a display screen, and in particular, allows an afterimage removing signal to be applied to a specific region so as to remove an afterimage of a set size and position.

The display unit 13 is a portion where a screen is displayed, and may be a plasma display panel or a liquid crystal display.

The controller 14 controls the components, in particular, to effectively remove the afterimage according to the afterimage removal method set by the user, and the key input unit 15 provides an interface of a user control input for setting the afterimage region. do. In addition, an OSD screen is generated for the user's key input and afterimage removal.

As the key input unit 15, a remote control unit can be used representatively.

The present invention relates to an image display apparatus having an effective afterimage removal function, and focuses only on the configuration for the afterimage removal.

5 and 6 illustrate exemplary embodiments of an afterimage removing function provided in an image display device of the present invention.

The video display device of the present invention provides an OSD (ON SCREEN DISPLAY) menu (MENU) so that a user can set the afterimage removal area, and thus provides a key input unit 15 as an input interface for user setting.

5 and 6 illustrate an embodiment in which a representative still image such as "MBC" is set as the afterimage removal area.

"MBC" is a broadcasting station channel name, which is generally displayed continuously while watching the corresponding channel, and is provided as a still image for a long time.

Since the area provided as the still image for a long time is particularly vulnerable to afterimages, in this embodiment, the user sets the portion where “MBC” is displayed as the afterimage removal area.

In FIG. 5, the afterimage is removed from the set area using the WHITE WASH method. In this case, a normal image may be viewed on the entire screen, and the afterimage may be effectively removed from the set area.

6 also shows the removal of the afterimage using the INVERSION method for the set area.

According to the exemplary embodiment shown in FIGS. 5 and 6, the user can view a normal whole image and can effectively cope with a partially generated afterimage.

On the other hand, although not shown in the drawings, the principle of the partial screen afterimage removal method of the present invention, as well as the WHITE WASH method and INVERSION method, as described above can be achieved through the pixel shift method and OBITER method through the OSD screen generation as described above. have.

7 is a view for explaining the principle that the afterimage removal function is implemented for the area set in the image display device of the present invention.

Referring to FIG. 7, screens are scanned by V-sync and H-sync of screens to form screens one line at a time.

At this time, when V-sync scans the next line, it outputs V-sync again. It is assumed that the time when the first V-sync output and the next line V-sync is output is 100 seconds, and H- Assuming that the time until all the outputs of sync are displayed is 101 seconds, assuming that the number of horizontal pixels is 100 on the screen, it takes 1 second to display color information of 1 pixel.

Therefore, if you want to implement the afterimage removal function from the 40th pixel to the 100th pixel of the screen, the afterimage removal function is implemented by counting the count in the timer and changing the color information from the 40th pixel to the 100th pixel. do.

On the other hand, it stores the output of V-sync so that the color information for screen afterimage removal for the user-set size is changed so that the afterimage removal function is activated in a specific area.

The change of the color information for the afterimage removal function may be based on the WHITE WASH method, or may be based on the INVERSION method.

Accordingly, the user may set an area having a desired size at a desired position on the display screen and implement an afterimage removing function for the corresponding area.

8 and 9 illustrate a method of setting an area for removing an afterimage on a display screen.

As illustrated in FIGS. 8 and 9, the user may set the afterimage removal area using the OSD menu, and set the size of the afterimage removal area as shown in FIG. 8 and determine the position as shown in FIG. 9.

That is, by designating a specific area on the display screen where the image is displayed, the afterimage may be removed only for the designated area.

However, as described below, the present invention may be applied together with the afterimage removing method for the entire entire screen.

10 to 12 are diagrams for setting a screen afterimage removal method.

10, a full screen afterimage removal, partial screen afterimage removal, full and partial screen afterimage removal, and automatic afterimage removal function are simultaneously displayed on the OSD menu.

Here, full-screen afterimage removal refers to a method of removing afterimages using the INVERSION method, ORBITER method, WHITE WASH method, and pixel shifting method for the entire screen. Say how.

In addition, full and partial screen afterimage removal refers to a combination of a conventional full screen afterimage removal method and an afterimage removal function for an area set by a user of the present invention, and the automatic afterimage removal function is applied to an area set by a user. It refers to a combination of the method of eliminating afterimages by automatic detection of zero afterimage and zero period.

Here, a method of automatically detecting an afterimage may be easily achieved by detecting a signal that is overlapped by detecting a signal of the image processing unit, and the afterimage removal function may be applied to an area where the overlapped signal is displayed in each frame. It is performed by the control unit.

The user can select one of the full screen afterimage removal method and the partial screen afterimage removal method so that the afterimage removal can be performed by either method, and by selecting both the full screen afterimage removal method and the partial screen afterimage removal method. Afterimage removal may be performed according to each set method.

In addition, by selecting the afterimage elimination of the entire screen and the partial screen, it is possible to perform the afterimage elimination operation at the same time.

FIG. 11 shows a menu for selecting a method for removing afterimages in full screen afterimage removal and partial screen afterimage removal.

As described above, as an afterimage removal method, an ORBITER method, a WHITE WASH method, an INVERSION method, and a pixel shift method may be provided, and a user may select the method for removing an afterimage of an entire screen and an afterimage of a partial screen.

The afterimage removal method set as described above operates on the full screen or the partial screen, respectively, or simultaneously on the full and partial screens according to the settings described with reference to FIG. 10.

12 illustrates a menu for explaining screen afterimage removal time.

Afterimage is executed periodically according to the method set for the area and the entire screen set by the user according to the time set by the user.

That is, as illustrated, when the user sets 30 minutes for the full screen and partial screen afterimage removal cycles, the afterimage removal function is executed for the area and the full screen designated by the user every 30 minutes.

Of course, the full screen afterimage removal cycle and the partial screen afterimage removal cycle may be set differently.

13 is a view for explaining a method of removing the afterimage screen according to the present invention.

By setting the size and position of the afterimage removal area by the user, a partial screen for removing the afterimage is set (S100).

Then, a method of removing afterimages of the full and partial screens is set. In this case, you can remove afterimages for the entire screen only, remove afterimages for the partial screen only, enable afterimage removal for the full and partial screens separately, or set afterimage removal for the full and partial screens simultaneously. Screen afterimage removal and automatic afterimage removal method can be set to operate at the same time (S110).

Next, set the execution cycle of afterimage removal. The afterimage removal execution cycle may be set for the full screen and the partial screen, respectively (S120).

The afterimage removal function is executed according to the above setting (S130).

In this way, the user can actively perform afterimage removal for a specific area, and can effectively view an image with clear image quality by effectively combining the afterimage removal method with the full screen afterimage removal method.

The present invention can provide an image display device provided with an effective afterimage removal function.

In the image display device of the present invention, a low quality image due to an afterimage can be removed by executing an afterimage removal function for an area set by a user and additionally performing an afterimage removal function for an entire screen area and an automatically detected area. Provides a method for removing afterimages.

In addition, according to the present invention, the afterimage removal function can further extend the life of the image display device.

Claims (9)

An image receiving unit to which an image signal is input from the outside; A key input unit for selecting an afterimage removal method such as an afterimage removal area, an afterimage removal area, and an execution cycle of an afterimage removal function for an entire screen or a screen portion according to a user's request; A controller for controlling an on-screen display menu for setting a method for removing an afterimage desired by a user through the key input unit, and controlling the afterimage removal function to be performed according to the afterimage removal method set by the user; An image processor configured to generate an afterimage removal signal by decoding an image signal input through the image receiver according to a control signal of the controller; A scaler for converting the signal output from the image processor to be displayed on a screen; And, And a display unit for displaying an image processed by the scaler. delete According to the user's request, the area is set to execute afterimage elimination for only one of the full screen and the partial screen for the full screen or the partial screen, or the afterimage elimination is performed for the full screen and the partial screen together, Setting an afterimage removal region to automatically detect an afterimage removal region so as to automatically perform an afterimage removal; Setting an afterimage removing method of the set area; Setting an execution cycle of the set afterimage removal method; And, And removing the afterimage removal function by the setting. delete The method of claim 3, wherein The afterimage removal method is characterized in that the operation is set to operate separately for the full screen and the partial screen, respectively. The method of claim 3, wherein The setting of the afterimage removing method may include setting at least one of a WHITE WASH method, an INVERSION method, an ORBITER method, and a pixel moving method. The method of claim 3, wherein The execution cycle of the afterimage removal function may be set to be the same or different for the entire screen and the partial screen. The method of claim 3, wherein The afterimage removal function on the partial screen is performed with an automatic afterimage removal function according to a user's selection. The method of claim 3, wherein And the setting of the afterimage removing area is the setting of the size and position of the area using the remote control unit.

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