KR20150042464A - Display apparatus and method for eliminating afterimage using the same - Google Patents

Abstract

The present invention relates to a display apparatus capable of removing an afterimage without loss of an image. The display apparatus comprises a display panel including a display area on which an image is displayed and a peripheral area surrounding the display area, the display area including a first display area and a second display area disposed between the first display area and the peripheral area, wherein a position of the image, which is displayed within the display area, is moved; a panel moving part which moves the display panel corresponding to the movement of the position of the image displayed on the display area; and an accommodation part which accommodates the display panel and the panel moving part and has a display window exposing the display area to the outside.

Description

Technical Field [0001] The present invention relates to a display device and a method for removing a residual image using the same,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device and a method for removing a residual image using the same, and more particularly, to a display device capable of removing a residual image of a display panel by moving a display panel, and a method of removing a residual image using the same.

2. Description of the Related Art Recently, a flat panel display (FPD), which is large in size and can be made thin and light, has been widely used as a display device. Examples of such flat display include a liquid crystal display (LCD) plasma display panel (PDP), and organic light emitting display (OLED).

When the image fixed on the screen is displayed for a long time, there is a problem that the afterimage remains even if the screen is changed due to the fixing phenomenon of the liquid crystal.

There is a method of displaying an intentional dynamic image (screen saver) by a user's operation in order to prevent the afterimage phenomenon as described above. However, this method can not be applied when a fixed image needs to be displayed for a long time . Accordingly, there is a method of moving a predetermined pixel from the upper side to the left side or the left side to the right side in order to solve the problem that the fixed image is displayed for a long time and the afterimage remains. However, There is a problem that a pixel that is not displayed is left on the screen.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and it is an object of the present invention to provide a display device capable of removing an afterimage without loss of an image.

It is another object of the present invention to provide a method for removing an afterimage using the display device.

In order to achieve the object of the present invention, a display device according to an embodiment of the present invention includes a display area for displaying an image and a peripheral area surrounding the display area, the display area including a first display area, And a second display area disposed between the display area and the peripheral area, wherein the image includes a display panel on which a position displayed in the display area moves, A panel moving unit for moving the display panel, and a receiving unit for receiving the display panel and the panel moving unit and having a display window for exposing the display area to the outside.

In one embodiment of the present invention, the size of the display area is larger than the size of the image input to the display device, the size of the first display area is equal to the size of the image input to the display device, In the first display mode, the image may be displayed in the first display area, and in the second display mode, the image may be displayed in a part of the first display area and a part of the second display area.

In one embodiment of the present invention, the size of the display window is the same as the size of the image, and the panel moving unit moves the display panel so that the entire image displayed is exposed to the outside through the display window, And cover all of the second display area in the first display mode and cover another part of the first display area and another part of the second display area in the second display mode.

In one embodiment of the present invention, the panel moving section includes a motor, the motor is disposed adjacent to at least one side surface of the display panel, and the display panel is provided between the display panel and the motor, And the motor guiding unit further includes a motor guiding part, wherein the motor is engaged with the motor guide part and rotates to move the display panel.

In one embodiment of the present invention, the rotation axis through which the motor rotates may be perpendicular to the display surface of the display panel.

In one embodiment of the present invention, the motor is movable in a direction perpendicular to the rotation axis.

In one embodiment of the present invention, the panel moving unit includes a motor, the motor is disposed adjacent to a rear surface of the display panel, and the display panel includes a motor for guiding the motor between the display panel and the motor. And the guide portion, and the motor is rotated by engaging with the motor guide portion to move the display panel.

In an embodiment of the present invention, the rotation axis through which the motor rotates may be horizontal to the display surface of the display panel.

In one embodiment of the present invention, the motor can move in the direction of the rotation axis.

In one embodiment of the present invention, in the first display mode, the second display region displays black color, and in the second display mode, another portion of the first display region and another portion of the second display region Black color can be displayed.

In an exemplary embodiment of the present invention, the location where the image is displayed may be moved when an identical image is input over a certain frame.

In one embodiment of the present invention, an image buffer for storing first input image data on a frame-by-frame basis and outputting second input image data received in a previous frame, an image buffer for storing the first input image data and the second input image data A count comparator for comparing the count value with a predetermined maximum value to output a shift control signal, and a comparator for comparing the count value with a predetermined maximum value to output the shift control signal and the first input image data, And a shift unit for shifting the displayed position, and the panel moving unit can move the display panel in response to the shift control signal.

In an exemplary embodiment of the present invention, the position of the image may be shifted in a predetermined frame period.

In one embodiment of the present invention, a frame counter for receiving input image data and counting the number of frames, comparing the counted number of frames with a predetermined maximum value to output a shift control signal, And a shift unit for shifting the display position of the image based on the input image data. The panel moving unit may move the display panel in response to the shift control signal.

According to another aspect of the present invention, there is provided an afterimage-removing method for generating a shift control signal by analyzing input image data input to a display panel, Moving a position at which the image is displayed within a display area having a size larger than a size of an image to be displayed based on the shift control signal, and moving the display panel according to the shift control signal.

In one embodiment of the present invention, the input image data includes first input image data and second input image data corresponding to a previous frame of the first input image data, and the step of generating the shift control signal includes: And outputting second input image data received from a previous frame by comparing the first input image data with the second input image data to output a count value, And comparing the count value with a predetermined maximum value to output a shift control signal.

In one embodiment of the present invention, the step of generating the shift control signal may include counting the number of frames of the input image data, comparing the counted number of frames with a predetermined maximum value, and outputting a shift control signal Step < / RTI >

In one embodiment of the present invention, the step of moving the display panel may move the display panel in a direction opposite to a direction in which the position at which the image is displayed corresponds to the shift control signal.

According to such a display apparatus, the display panel moves together with the pixel movement of the image, and the afterimage can be removed without distortion or loss of the image. Therefore, even when a fixed image is displayed for a long time, it is not recognized that the image is moved, and image distortion at the edge of the image can be eliminated, thereby improving the display quality of the display device.

1 is a block diagram showing a display device according to an embodiment of the present invention.
2 is a block diagram illustrating a timing controller of FIG. 1 according to an embodiment of the present invention.
3 is a plan view showing the display panel of Fig.
4A to 4E are plan views of a display panel showing a method of shifting an image according to an embodiment of the present invention.
5A is a plan view of a display device according to an embodiment of the present invention.
5B is a plan view of a display device according to an embodiment of the present invention.
6 is an exploded perspective view of a portion of the display device of Figs. 5A and 5B.
7A is a plan view of a display device according to another embodiment of the present invention.
7B is a plan view of a display device according to another embodiment of the present invention.
8 is an exploded perspective view of a part of the display device of Figs. 7A and 7B.
9 is a block diagram showing the timing controller of FIG. 1 according to another embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in more detail with reference to the accompanying drawings.

1 is a block diagram showing a display device according to an embodiment of the present invention. 2 is a block diagram illustrating a timing controller of FIG. 1 according to an embodiment of the present invention.

1 and 2, the display device includes a display panel 100, a gate driving unit 310, a data driving unit 330, a gamma reference voltage generating unit 350, a timing control unit 500, and a motor driving unit 700 ).

The display panel 100 displays an image. The display panel 100 may include a first substrate, a second substrate facing the first substrate, and a liquid crystal layer disposed between the first and second substrates.

The display panel 100 includes a plurality of pixels. The pixel may comprise a red subpixel, a green subpixel, and a blue subpixel.

The display panel 100 includes a plurality of gate lines GL and a plurality of data lines DL and the sub pixels are connected to the gate lines GL and the data lines DL, do. The gate lines GL extend in a first direction D1 and the data lines DL extend in a second direction D2 that intersects the first direction D1.

Each sub-pixel includes a switching element, and a liquid crystal capacitor electrically connected to the switching element. Each of the subpixels may further include a storage capacitor. The subpixels are arranged in a matrix form. The switching device may be a thin film transistor.

The gate lines GL, the data lines DL, the pixel electrodes, and the storage electrodes may be disposed on the first substrate, and the common electrodes may be disposed on the second substrate.

The timing controller 500 receives input image data RGB and an input control signal CONT from an external device. The input image data may include red image data R, green image data G, and blue image data B, for example. The input control signal may include a master clock signal, a data enable signal, a vertical synchronization signal, and a horizontal synchronization signal.

The timing controller 500 generates a first control signal CONT1, a second control signal CONT2, a shift control signal SHCONT, and a data signal CONT2 based on the input image data RGB and the input control signal CONT. (DATA).

The timing controller 500 generates the first control signal CONT1 for controlling the driving timing of the gate driver 310 based on the input control signal CONT and outputs the first control signal CONT1 to the gate driver 310 . The first control signal CONT1 may include a vertical start signal, a gate clock signal, and the like.

The timing controller 500 generates the second control signal CONT2 for controlling the driving timing of the data driver 330 based on the input control signal CONT and outputs the second control signal CONT2 to the data driver 330 . The second control signal CONT2 may include a horizontal start signal, a load signal, and the like.

The timing controller 500 generates the data signal DATA based on the input image data RGB and outputs the data signal to the data driver 330.

The generation of the first control signal CONT1, the second control signal CONT2, the shift control signal SHCONT and the data signal DATA will be described in more detail below.

The timing control unit 500 includes an image buffer 510, an image comparison unit 530, a count comparison unit 550, and a shift unit 570.

(N) -frame input image data RGB (n) corresponding to the most recent frame and the (n) -frame input image data RGB (n) for the convenience of explanation. (N-1) -th frame input image data RGB (n-1) corresponding to the immediately preceding frame.

The image buffer 510 stores the (n) -frame input image data RGB (n) on a frame-by-frame basis and outputs the (n-1) -frame input image data RGB (n- 1) to the image comparator 530.

The image comparator 530 receives the (n) -frame input image data RGB (n) and outputs the (n-1) -frame input image data RGB (n -1) and transmits the count value COUNT to the count comparator 550. [

The image comparator 530 compares the received (n) -frame input image data RGB (n) with the (n-1) -frame input image data RGB (n-1) The count value COUNT is incremented by one, and if not, the count value COUNT is reset to zero.

The image comparator 530 transfers the count value COUNT, which is increased or reset to 0, to the count comparator 550.

The count comparator 550 compares the count value COUNT received from the image comparator 530 with a predetermined maximum value CT_Max and outputs the shift control signal SHCONT to the shift unit 570 .

When the count value COUNT is equal to the maximum value CT_Max, the count comparator 550 changes the shift control signal SHCONT to a signal for shifting the image and transmits the signal to the shift unit 570 And if not, the shift control signal SHCONT is changed to a signal for not shifting the image and is transmitted to the shift unit 570.

The shift unit 570 receives the input control signal CONT and the (n) -frame input image data RGB (n) and receives the shift control signal SHCONT from the count comparator 550 do.

When the shift control signal SHCONT corresponds to a signal for shifting an image, the shift unit 570 generates a data signal DATA by shifting the image in a predetermined direction, and outputs the input control signal CONT And generates a first control signal CONT1 and a second control signal CONT2 corresponding to the shifted image.

A detailed description of a method of shifting an image will be described in detail in Figs. 3 to 4E.

When the shift control signal SHCONT corresponds to a signal for not shifting the image, the shift unit 570 generates the data signal DATA while maintaining the shift state of the previous frame, The first control signal CONT1 and the second control signal CONT2 corresponding to the image in which the shifted state of the previous frame is maintained.

The gate driver 310 receives the first control signal CONT1 from the timing controller 500. The gate driver 310 generates gate signals for driving the gate lines GL in response to the first control signal CONT1. The gate driver 310 sequentially outputs the gate signals to the gate lines GL.

The gamma reference voltage generator 350 generates the gamma reference voltage VGREF. The gamma voltage generator 380 provides the gamma reference voltage VGREF to the data driver 330. The gamma reference voltage VGREF has a value corresponding to each data signal DATA. The gamma voltage generator 380 may be disposed in the data driver 330.

The data driver 330 receives the second control signal CONT 2 and the data signal DATA from the timing controller 500. The data driver 330 receives the gamma reference voltage VGREF from the gamma voltage generator 380.

The data driver 330 converts the data signal DATA into analog data voltages using the gamma reference voltage VGREF. The data driver 330 outputs the data voltages to the data lines DL.

The motor driver 700 receives the shift control signal SHCONT from the timing controller 500.

The motor driver 700 moves the display panel 100 in a predetermined direction when the shift control signal SHCONT corresponds to a signal for shifting the image. For example, when the image displayed on the display panel 100 is shifted by N pixels in the first direction D1, the display panel 100 displays the image in the direction opposite to the first direction D1 The panel 100 is moved by a distance corresponding to the N pixels.

The motor driving unit 700 may move the display panel 100 in the first direction D1, the second direction D2, and the first and second directions D2, respectively. Alternatively, it may be moved in the directions opposite to the third direction D3, the fourth direction D4, and the third and fourth directions D4, respectively.

3 is a plan view showing the display panel of Fig.

Referring to FIG. 3, the display panel 100 includes a display area for displaying an image and a peripheral area PA surrounding the display area. The display area includes a first display area DA1 and a second display area DA2.

The first display area DA1 has a size corresponding to a size of an original image included in the input image data RGB.

For convenience of explanation, the present embodiment will be described on the basis that the size of the original image is 1920 pixels wide by 1080 pixels high. Therefore, the size of the first display area DA1 has a value of 1920 pixels horizontally and 1080 pixels horizontally, which is equal to the size of the original image.

The display area has a size larger by 2 * K pixels in width and 2 * K pixels in height than the size of the first display area DA1. For example, K has a size of 4 pixels and the size of the display area has a value of 1928 pixels horizontally and 1088 pixels vertically.

The second display area DA2 is defined as a remaining area of the display area except for the first display area DA1.

4A to 4E are plan views of a display panel showing a method of shifting an image according to an embodiment of the present invention.

2 and 4A, the display area displays an image in a first display mode in which the original image is located in the first display area DA1. In the first display mode, the second display area DA2 is filled with a black color.

The shifting unit 570 shifts the original image included in the (n) -frame input image data RGB (n) to the center of the display area in order to display the image in the first display mode. Is displayed in the first display area DA1 and the second display area DA2 is generated in the data signal DATA for filling with black color. For example, the data signal DATA may include information for displaying the first display area DA1 and the second display area DA2.

2 and 4B, the display region displays an image in a second display mode in which the original image is located in a direction opposite to the fourth direction D4 at the center of the display region. In the second display mode, the original image is divided into a part of the first display area DA1 in the direction opposite to the fourth direction D4 and a part of the second display area DA2 in the direction opposite to the fourth direction D4 And the remaining portions of the first display area DA1 and the second display area DA2 in which the original image is not displayed are filled with a black color.

The shift unit 570 outputs the original image included in the (n) -frame input image data RGB (n) to the first display area DA1 in order to display the image in the second display mode. Is displayed on a part of the second display area DA2 opposite to the fourth direction D4 and a part of the second display area DA2 opposite to the fourth direction D4 and the first display area DA1 And the remaining portion of the second display area DA2 generate a data signal DATA for filling with a black color. For example, the data signal DATA may include information for displaying the first display area DA1 and the second display area DA2.

2 and 4C, the display region displays an image in a third state in which the original image is located in a third direction D3 at the center of the display region. The original image is displayed in a part of the third direction D3 of the first display area DA1 and a part of the third direction D3 of the second display area DA2 in the third state, The remaining portions of the first display area DA1 and the second display area DA2 where no image is displayed are filled with a black color.

The shift unit 570 outputs the original image included in the (n) -frame input image data RGB (n) to the first display area DA1 in order to display the image in the third state. The first display area DA1 and the second display area DA2 in which the original image is not displayed are displayed on a part of the three directions D3 and a part of the third direction D3 of the second display area DA2 DA2) generates a data signal (DATA) for filling with a black color. For example, the data signal DATA may include information for displaying the first display area DA1 and the second display area DA2.

2 and 4D, the display region displays an image in a fourth state in which the original image is located in a direction opposite to the third direction D3 at the center of the display region. In the fourth state, the original image is divided into a part of the first display area DA1 in the direction opposite to the third direction D3 and a part of the second display area DA2 in the direction opposite to the third direction D3 And the remaining portions of the first display area DA1 and the second display area DA2 in which the original image is not displayed are filled with a black color.

The shift unit 570 outputs the original image included in the (n) -frame input image data RGB (n) to the first display area DA1 in order to display the image in the fourth state. The first display area DA1 in which the original image is not displayed is displayed on a part of the second display area DA2 in the direction opposite to the third direction D3 and a part of the second display area DA2 in the direction opposite to the third direction D3, And the remaining portion of the second display area DA2 generate a data signal DATA for filling with a black color. For example, the data signal DATA may include information for displaying the first display area DA1 and the second display area DA2.

2 and 4E, the display region displays an image in a fifth state in which the original image is located in a fourth direction (D4) at the center of the display region. In the fifth state, the original image is displayed in a part of a fourth direction (D4) of the first display area (DA1) and a part of a fourth direction (D4) of the second display area (DA2) The remaining portions of the first display area DA1 and the second display area DA2 where no image is displayed are filled with a black color.

The shift unit 570 outputs the original image included in the (n) -frame input image data RGB (n) to the first display area DA1 in order to display the image in the fifth state. The first display area DA1 and the second display area D2 in which the original image is not displayed are displayed on a part of the four directions D4 and a part of the fourth direction D4 of the second display area DA2 DA2) generates a data signal (DATA) for filling with a black color. For example, the data signal DATA may include information for displaying the first display area DA1 and the second display area DA2.

The first display area DA1 and the second display area DA2 display an image in the first display mode when the display device is initially driven.

When the image corresponds to an image that changes every frame, the count value COUNT maintains a value of 0, so that the shift control signal SHCONT received by the shift unit 570 also shifts the image And the first display mode is maintained.

When the counted value COUNT is incremented by one to have the same value as the maximum value CT_Max when the image corresponds to a fixed image, the count comparator 550 outputs the shift control signal SHCONT, The shift control unit 570 switches the first display mode to the second display mode in response to the changed shift control signal SHCONT, do.

When the image is changed to an image that changes every frame after the second display mode is changed, the count value COUNT is readjusted to 0 and then maintained at 0, The shift control signal SHCONT received by the shift register 570 also maintains a signal for not shifting the image so that the second display mode is maintained. In contrast, when the image continues to be a fixed image, the count value COUNT is readjusted to 0 again, and is incremented by 1 to have the same value as the maximum value CT_Max, The shift control unit 570 changes the shift control signal SHCONT to a signal for shifting the image and transmits the signal to the shift control unit 570. The shift control unit 570 outputs the shift control signal SHCONT in response to the changed shift control signal SHCONT, And switches the second display mode to the third state.

According to the image to be displayed later, the display device can be switched to the third state, the fourth state and the fifth state in order, and after the fifth state, the display mode is switched again to the first display mode to display the image.

Alternatively, the display device may switch the first display mode to the fifth state by mixing them at random. Alternatively, the original image may be displayed in a direction opposite to the first direction (D1) and the first direction (D1) or in the second direction (D2) and the second direction (D2) with reference to the center of the display region It may move in the opposite direction.

5A and 5B are plan views of a display device according to an embodiment of the present invention. 6 is an exploded perspective view of a portion of the display device of Figs. 5A and 5B.

5A to 6, the display device includes a storage unit 30 for storing the display panel 100, a panel moving unit 30 for moving the display panel 100 adjacent to the side surface of the display panel 100, .

The storage unit 30 includes a display window 31 for exposing the display area of the display panel 100 to the outside. The size of the display window 31 is the same as the size of the original image. The housing part 30 is positioned on the display panel 100 and exposes a part of the display area to the outside through the display window 31. The remaining part of the display area and the peripheral area PA are covered with a cover do.

The panel moving unit includes at least one motor 710.

At least one of the motors 710 is disposed adjacent to a side surface of the display panel 100. For example, the first side positioned in the first direction D1 of the display panel 100 at all times, the second side positioned in the second direction D2, the third side positioned in the direction opposite to the first direction D1, And the motor 710 may be disposed on the fourth side surface located in the opposite direction to the second direction D2.

The motor 710 rotates with its rotation axis at its center. The motor 710 is disposed so that the direction of the rotation axis is perpendicular to the first direction D1 and the second direction D2.

The display panel 100 includes a motor guide 730 for guiding the motor 710 to the first side to the fourth side.

The motor guide portion 730 is disposed between the display panel 100 and the motor 710. The motor 710 and the motor guide unit 730 are formed with teeth that mesh with each other. The display panel 100 moves as the motor 710 rotates.

The motors 710 located on the opposite side of the display panel 100 rotate in opposite directions. More specifically, the motor 710 located on the first side rotates in a direction opposite to that of the motor 710 located on the third side, and the motor 710 located on the second side rotates And rotates in the opposite direction to the motor 710 located on the four sides.

The motor 710 located on the first side and the third side of the display panel 100 moves the display panel 100 in a direction opposite to the second direction D2 and the second direction D2 .

The motor 710 located on the second side and the fourth side of the display panel 100 moves the display panel 100 in a direction opposite to the first direction D1 and the first direction D1 .

The motor 710 is movable in a direction perpendicular to the rotation axis.

Referring to FIGS. 1 and 5A to 6, the motor driving unit 700 drives the motor 710 in response to the shift control signal SHCONT received from the timing control unit 500.

The motor driving unit 700 drives the motor 710 to change the position of the display panel 100 so that the original image can be exposed to the outside through the display window 31 at all times.

More specifically, when the shift control signal SHCONT corresponds to a signal for shifting the image, the motor driving unit 700 drives the motor 710 so that the display panel 100 is shifted in the direction in which the image is shifted Move in the opposite direction. Therefore, even if the position of the original image is displayed on the display area, the entire original image can be always exposed through the display window 31. [

5A and 5B are diagrams for explaining a case where the display control signal SHCONT corresponds to a signal for shifting an image and the display panel is switched from the first display mode to the second display mode 100).

5A, the original image is positioned at the center of the display area in the first display mode, and the display panel 100 is also located at the center of the storage part 30, And the second display area DA2 and the peripheral area are covered by the accommodating part 30. The second display area DA2 and the surrounding area are covered by the accommodating part 30. [

In FIG. 5B, the shift control signal SHCONT corresponds to a signal for shifting an image, so that the display area is switched from the first display mode to the second display mode. At the same time, the motor driving unit 700, which has received the shift control signal SHCONT, drives the motor 710 to drive the motor 710 so that, as the display region is switched from the first display mode to the second display mode, The display panel 100 is moved in the fourth direction D4, which is a direction opposite to the direction in which the position of the original image is displayed.

Accordingly, since the display panel 100 is moved in the fourth direction D4 corresponding to the movement of the display position of the original image in the display area to a position opposite to the fourth direction D4, The entire original image is still exposed to the outside through the display window 31 even though the position at which the image is displayed is moved within the display area.

7A and 7B are plan views of a display device according to another embodiment of the present invention. 8 is an exploded perspective view of a part of the display device of Figs. 7A and 7B.

7A to 8, except for the panel moving section, the motor guide section 830, and the motor 810, as compared with the display apparatuses of Figs. 7A to 8, same. Therefore, the same members as those of the display apparatuses of Figs. 7A to 8 are denoted by the same reference numerals, and redundant description can be omitted.

7A to 8, the display device includes a storage unit 30 for storing the display panel 100, and a panel moving unit 30 for moving the display panel 100 adjacent to the back surface of the display panel 100. [ .

The panel moving unit includes at least one motor (810). At least one of the motors 810 is disposed adjacent to a rear surface of the display panel 100. For example, the motor 810 may be disposed on the back surface of the display panel 100 at a position adjacent to the first side to the fourth side.

The motor 810 rotates with its rotation axis at its center. The motor 810 is disposed so that the direction of the rotation axis is horizontal in the first direction D1 and the second direction D2.

More specifically, the motor 810 adjacent to the first side and the third side on the rear surface of the display panel 100 has a rotation axis horizontally arranged in the second direction D2, and the display panel 100 The rotation axis of the motor 810 adjacent to the second side surface and the fourth side surface is disposed horizontally in the first direction D1.

The display panel 100 includes a motor guide portion 830 for guiding the motor 810 to the rear side.

The motor guide portion 830 is disposed between the display panel 100 and the motor 810. The motor 810 and the motor guide 830 are formed with teeth that mesh with each other. As the motor 810 rotates, the display panel 100 moves.

The motors 810 having the same direction of rotation axis rotate in the same direction. More specifically, the motors (810) adjacent to the first side and the third side on the back surface of the display panel (100) rotate in the same direction with each other, and on the back side of the display panel (100) The side surfaces and the motors 810 adjacent to the fourth side surface rotate in the same direction with respect to each other.

The motor 810 adjacent to the first side and the third side on the back surface of the display panel 100 can move the display panel 100 in a direction opposite to the second direction D2 and the second direction D2 .

The motor 810 adjacent to the second side surface and the fourth side surface on the back surface of the display panel 100 may be configured to move the display panel 100 in a direction opposite to the first direction D1 and the first direction D1 .

The motor 810 is movable in the rotation axis direction.

Referring to FIGS. 1 and 7A to 8, the motor driving unit 700 drives the motor 810 in response to the shift control signal SHCONT received from the timing control unit 500.

The motor driving unit 700 drives the motor 810 to change the position of the display panel 100 so that the entire original image can be exposed to the outside through the display window 31 at all times.

When the shift control signal SHCONT corresponds to a signal for shifting the image, the motor driving unit 700 drives the motor 810 to move the display panel 100 in a direction opposite to the direction in which the image is shifted .

7A and 7B are diagrams for explaining a case where the shift control signal SHCONT corresponds to a signal for shifting an image and the display panel 100 ).

7A, the original image is positioned at the center of the display area in the first display mode, and the display panel 100 is also located at the center of the storage part 30, And the second display area DA2 and the peripheral area are covered by the accommodating part 30. The second display area DA2 and the surrounding area are covered by the accommodating part 30. [

In FIG. 7B, the shift control signal SHCONT corresponds to a signal for shifting an image, and the display area is switched from the first display mode to the second display mode. At the same time, the motor driving unit 700, which has received the shift control signal SHCONT, drives the motor 710 to drive the motor 710 so that, as the display region is switched from the first display mode to the second display mode, The display panel 100 is moved in the fourth direction D4, which is a direction opposite to the direction in which the position of the original image is displayed.

Accordingly, since the display panel 100 is moved in the fourth direction D4 corresponding to the movement of the original image in the display area to a position opposite to the fourth direction D4, The position where the original image is displayed is still exposed to the outside through the display window 31 even though it is moved within the display area.

9 is a block diagram showing the timing controller of FIG. 1 according to another embodiment of the present invention.

The display apparatus according to the present embodiment is substantially the same as the display apparatuses shown in Figs. 1 to 8 except for the timing control section 501 as compared with the display apparatuses shown in Figs. 1 to 8. Therefore, the same members as those of the display apparatuses of Figs. 1 to 8 are denoted by the same reference numerals, and redundant description may be omitted.

1 to 9, the display device includes a display panel 100, a gate driver 310, a data driver 330, a gamma reference voltage generator 350, a timing controller 501, and a motor driver 700 ).

The timing controller 501 receives input image data RGB and an input control signal CONT from an external device.

The timing controller 501 generates a first control signal CONT1, a second control signal CONT2, a shift control signal SHCONT, and a data signal CONT2 based on the input image data RGB and the input control signal CONT. (DATA).

The timing control unit 501 includes a frame counter 551 and a shift unit 571.

The frame counter 551 receives the input image data RGB, counts the number of frames, and transmits the shift control signal SHCONT to the shift unit 571.

When the number of frames becomes equal to a predetermined maximum value, the frame counter 551 changes the shift control signal SHCONT to a signal for shifting the image, transfers the signal to the shift unit 571, and starts counting again . The shift control signal SHCONT is changed to a signal for not shifting the image, and the shift control signal SHCONT is transmitted to the shift unit 571.

The shift unit 571 receives the input control signal CONT and the input image data RGB and receives the shift control signal SHCONT from the frame counter 551.

When the shift control signal SHCONT corresponds to a signal for shifting an image, the shift unit 571 generates a data signal DATA by shifting the image in a predetermined direction, and outputs the input control signal CONT And generates a first control signal CONT1 and a second control signal CONT2 corresponding to the shifted image.

A detailed description of a method of shifting an image is the same as that described in Figs. 3 to 4E.

When the shift control signal SHCONT corresponds to a signal for not shifting the image, the shift unit 571 generates a data signal DATA while maintaining the shift state of the previous frame, The first control signal CONT1 and the second control signal CONT2 corresponding to the image in which the shifted state of the previous frame is maintained.

According to the present embodiment, it is possible to improve the problem that a residual image is generated even when an image fixed on the display panel is displayed for a long time. In order to improve a residual image, It can not be confirmed that the display panel itself shifts and the image is shifted when viewed from the outside, and it is possible to prevent the image from being lost at the outer edge of the image.

 The display device according to an embodiment of the present invention can be used for a home display device such as a television, a desktop monitor, and a commercial display device such as a large electric signboard.

30: storage compartment 31: display window
100: display panel 310: gate driver
330: Data driver 350: Gamma reference voltage generator
500, 501: Timing control unit 510: Image buffer
530: image comparison unit 550: count comparison unit
551: frame counter 570, 571:
700: motor drive part DA1: first display area
DA2: second display area PA: peripheral area
710, 810: motors 730, 830: motor guide portion
RGB: input image data CONT: input control signal
CONT1: first control signal CONT2: second control signal
SHCONT: Shift control signal DATA: Data signal
CONT: count value

Claims (18)

A display area for displaying an image and a peripheral area surrounding the display area, the display area including a first display area and a second display area disposed between the first display area and the peripheral area, The image being displayed on the display panel;
A panel moving unit moving the display panel in correspondence with the movement of the image displayed on the display area; And
And a housing portion accommodating the display panel and the panel moving portion and having a display window for exposing the display region to the outside. The method according to claim 1,
Wherein the size of the display area is larger than the size of the image input to the display device,
Wherein the size of the first display area is equal to the size of the image input to the display device,
In the first display mode, the image is displayed in the first display area,
And the image is displayed in a part of the first display area and a part of the second display area in the second display mode. 3. The method of claim 2,
The size of the display window is the same as the size of the image,
Wherein the panel moving unit moves the display panel so that the entire displayed image is exposed to the outside through the display window,
Wherein,
And covers all of the second display area in the first display mode,
And covers another portion of the first display region and another portion of the second display region in the second display mode. The method of claim 3,
Wherein the panel moving section includes a motor,
Wherein the motor is disposed adjacent to at least one side surface of the display panel,
Wherein the display panel further comprises a motor guide portion for guiding the motor between the display panel and the motor,
Wherein the motor rotates in engagement with the motor guide portion to move the display panel. The display device according to claim 4, wherein a rotation axis of the motor is perpendicular to a display surface of the display panel. The display device according to claim 5, wherein the motor is movable in a direction perpendicular to the rotation axis. The method of claim 3,
Wherein the panel moving section includes a motor,
Wherein the motor is disposed adjacent to a back surface of the display panel,
Wherein the display panel further comprises a motor guide portion for guiding the motor between the display panel and the motor,
Wherein the motor rotates in engagement with the motor guide portion to move the display panel. The display device according to claim 7, wherein a rotation axis through which the motor rotates is horizontal to the display surface of the display panel. The display device according to claim 8, wherein the motor is movable in the direction of the rotation axis. 3. The method of claim 2,
In the first display mode, the second display area displays black color,
And the other part of the first display area and the other part of the second display area in the second display mode display a black color. The method according to claim 1,
Wherein the position of the image is shifted when an identical image is input with a predetermined frame or more. 12. The method of claim 11,
An image buffer for storing first input image data on a frame basis and outputting second input image data received in a previous frame;
An image comparison unit comparing the first input image data and the second input image data and outputting a count value;
A count comparing unit for comparing the count value with a predetermined maximum value and outputting a shift control signal; And
Further comprising a shift unit for shifting a position at which the image is displayed based on the shift control signal and the first input image data,
And the panel moving unit moves the display panel in response to the shift control signal. The method according to claim 1,
Wherein the position of the image is shifted by a predetermined frame period. 14. The method of claim 13,
A frame counter which counts the number of frames by receiving input image data, compares the counted number of frames with a predetermined maximum value and outputs a shift control signal; And
Further comprising a shift unit for shifting a position at which the image is displayed based on the shift control signal and the input image data,
And the panel moving unit moves the display panel in response to the shift control signal. Analyzing input image data input to the display panel to generate a shift control signal;
Shifting a position at which the image is displayed within a display area having a size larger than a size of an image to be displayed based on the shift control signal and the input image data; And
And moving the display panel according to the shift control signal. The apparatus of claim 15, wherein the input image data includes first input image data and second input image data corresponding to a previous frame of the first input image data,
Wherein the step of generating the shift control signal comprises:
Storing the first input image data in units of frames and outputting second input image data received in a previous frame;
Comparing the first input image data with the second input image data and outputting a count value; And
And comparing the count value with a predetermined maximum value to output a shift control signal. 16. The method of claim 15, wherein generating the shift control signal comprises:
Counting the number of frames of the input image data, and comparing the counted number of frames with a predetermined maximum value to output a shift control signal. 16. The method of claim 15, wherein moving the display panel comprises:
And moving the display panel in a direction opposite to a direction in which the position at which the image is displayed corresponds to the shift control signal.

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