Display device and driving method thereof

Abstract

A display device and a driving method thereof are provided. The display device includes a display area for displaying an image. The method includes the following steps: performing a first pixel shift drive by shifting an image in the display area by a first range without loss of image information due to image expansion or contraction; checking whether a change in block grayscale values ​​in a region of interest in the display area is greater than or equal to a threshold; and performing a second pixel shift drive by shifting the image with loss of image information.

Description

[0001] This application claims priority to and the benefit of Korean Patent Application No. 10-2020-0023867, filed on February 26, 2020, which is hereby incorporated by reference herein in its entirety. Technical Field

[0002] The present invention relates to a display device and a driving method thereof. Background Art

[0003] Recently, various types of display devices, such as organic light emitting display devices, liquid crystal display devices, and plasma display devices, have been widely used.

[0004] Because these display devices continuously output a specific image or text for a long time (eg, as a result of their long driving time), one or more pixels of the display may degrade, and reduction or degradation in performance of the display may occur.

[0005] In order to prevent or reduce the degradation of pixels of a display caused by long drive times, a method of shifting and displaying an image on a display panel at regular intervals (e.g., pixel shifting technology) can be used. When an image is shifted and displayed on a display panel at regular intervals, it is possible to prevent or reduce the output of the same data to a specific pixel for a long time, thereby also reducing pixel degradation. Summary of the Invention

[0006] One or more embodiments of the present disclosure provide a display device configured to reduce or minimize user recognition of image shift while reducing pixel degradation.

[0007] One or more embodiments of the present disclosure are not limited to the above-described aspects, and other technical aspects not described will be clearly understood by those skilled in the art from the following description.

[0008] In one or more embodiments of the present disclosure, a method for driving a display device including a display area for displaying an image is provided. The method includes the following steps: performing a first pixel shift drive by shifting an image in the display area by a first range without loss of image information due to expansion or reduction of the image; checking whether a change in block grayscale values ​​in a region of interest in the display area is greater than or equal to a threshold; and performing a second pixel shift drive by shifting the image with loss of image information.

[0009] In one or more embodiments, the step of checking whether the change in the block grayscale value in the area of ​​interest is greater than or equal to a threshold value includes the following steps: when the change in the block grayscale value is less than the threshold value, performing a second first pixel shift drive; and when the change in the block grayscale value is greater than or equal to the threshold value, performing a second pixel shift drive.

[0010] In one or more embodiments, the method further comprises the steps of: after the second pixel shift drive, performing a step of checking whether a change in block grayscale value in the focus area is greater than or equal to a threshold; and performing a second first pixel shift drive.

[0011] In one or more embodiments, in the first first pixel shift drive, the image shift may start at the first point and stop at the second point, in the second pixel shift drive, the image shift may start at the first point and stop at the third point, and in the second first pixel shift drive, the image shift may start at the second point.

[0012] In one or more embodiments, in the second pixel shift driving, image shifting of a first range or a second range may be performed, and the second range may be smaller than the first range.

[0013] In one or more embodiments, the image may not be enlarged or reduced in the second pixel shift driving.

[0014] In one or more embodiments, the display area may include an edge zoom area that is enlarged or reduced by image shifting by the second pixel shifting drive.

[0015] In one or more embodiments, the region of interest includes a plurality of regions of interest.

[0016] In one or more embodiments, the plurality of interest regions may be positioned to respectively contact edges of the display area.

[0017] In one or more embodiments, the image may include a scrolling region in which subtitles, text information, etc. are shifted in at least some portions, and the focus area may be positioned to include at least a portion of the scrolling region.

[0018] In one or more embodiments, when subtitles, text information, etc. are shifted in the focus area, the change in the block grayscale value may be greater than or equal to a threshold.

[0019] In one or more embodiments, the block grayscale value may be the sum of grayscale values ​​of multiple pixels in the pixel block.

[0020] In one or more embodiments, in the second pixel shift drive, after the image of the second range is shifted, a portion of the first area of ​​the image before the shift may be reduced or enlarged and displayed, and the remaining portion of the first area may not be displayed.

[0021] A display device according to one or more embodiments of the present disclosure includes: an image corrector configured to generate second image data based on first image data; a data driver configured to generate a data signal based on the first image data or the second image data; and a display panel including a display area for displaying an image, the display area including pixels that emit light at a brightness corresponding to the data signal. The display panel performs a first pixel shift drive by shifting an image in the display area by a first range without loss of image information due to expansion or reduction of the image, and performs a second pixel shift drive with loss of image information.

[0022] In one or more embodiments, the image corrector may correct the first image data to generate second image data and perform an image shift on the image along a shift path.

[0023] In one or more embodiments, the image corrector includes a shift determiner configured to determine a shift direction and a shift amount of the image.

[0024] In one or more embodiments, the image corrector may further include a region determiner configured to determine a region in which the image is enlarged or reduced.

[0025] In one or more embodiments, the display panel may perform first pixel shift driving for the first time, and may perform second pixel shift driving when a change in block grayscale values ​​in a focus area in the display area is greater than or equal to a threshold.

[0026] In one or more embodiments, the display panel may perform a first pixel shift drive for the first time, and may perform a second first pixel shift drive when a change in a block grayscale value in a focus area in the display area is less than a threshold.

[0027] In one or more embodiments, image shifting in a second range smaller than the first range may be performed in the second pixel shift driving.

[0028] In one or more embodiments, in the second pixel shift driving, a loss of image information in which a portion of the image is not displayed may occur due to image shifting.

[0029] Details of other embodiments are included in the detailed description and accompanying drawings.

[0030] According to one or more disclosed embodiments, pixel degradation may be improved, and recognition of image shift by a user may be minimized or reduced.

[0031] The effects according to the embodiment are not limited to the details shown above, but more various effects are included in the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The above and other features of the disclosure will become more apparent by further describing the disclosed embodiments in detail with reference to the accompanying drawings, in which:

[0033] Figure 1 is a schematic block diagram of a display device according to one or more embodiments of the present disclosure;

[0034] Figure 2 yes Figure 1 A schematic block diagram of the image corrector shown in ;

[0035] Figure 3 is a conceptual diagram illustrating a display area of ​​a display panel according to one or more embodiments of the present disclosure;

[0036] Figure 4 It shows the settings Figure 3 A conceptual diagram of pixels in a display area shown in ;

[0037] Figure 5 It shows Figure 4 Conceptual diagram of the shift of an image in the display area shown in ;

[0038] Figure 6 It shows Figure 4 A conceptual diagram of a pixel block in a display area shown in FIG;

[0039] Figure 7 is an algorithm flow chart schematically illustrating a method for driving a display device according to one or more embodiments of the present disclosure;

[0040] Figure 8 and Figure 9 is a conceptual diagram illustrating an X-axis direction image shift according to one or more embodiments of the present disclosure;

[0041] Figure 10 is a conceptual diagram illustrating a method of generating image data shifted in the X-axis direction according to one or more embodiments of the present disclosure;

[0042] Figure 11 and Figure 12 is a conceptual diagram illustrating Y-axis direction image shift according to one or more embodiments of the present disclosure;

[0043] Figure 13 is a conceptual diagram illustrating a method of generating image data shifted in the Y-axis direction according to one or more embodiments of the present disclosure;

[0044] Figure 14 It shows Figure 4 Conceptual diagram of the shift of an image in the display area shown in ;

[0045] Figure 15is a conceptual diagram illustrating a method of generating image data shifted in the X-axis direction according to one or more embodiments;

[0046] Figure 16 is a conceptual diagram for describing a method of driving a display device according to one or more embodiments of the present disclosure;

[0047] Figure 17 is a conceptual diagram illustrating a pixel block in a display device according to yet another embodiment of the present disclosure; and

[0048] Figure 18 is a conceptual diagram illustrating a pixel block in a display device according to yet another embodiment of the present disclosure. DETAILED DESCRIPTION

[0049] The features and aspects of the present disclosure and methods for implementing them will become clear with reference to the embodiments described in detail below and the accompanying drawings. However, the disclosure is not limited to the embodiments disclosed below and can be implemented in a variety of different forms. The present embodiments are provided so that the disclosure will be thorough and complete and that those skilled in the art can fully understand the scope of the disclosure. The disclosure is limited only by the scope of the claims.

[0050] Although the terms "first," "second," and so on are used to describe various components, these components are not limited by these terms. These terms are used only to distinguish one component from another. Therefore, within the spirit of the disclosed technology, the first component mentioned below may be the second component. Unless the context clearly indicates otherwise, a singular expression includes a plural expression.

[0051] For ease of description, spatially relative terms such as "below," "beneath," "below," "below," "above," and "on" may be used herein to describe the relationship of one element or feature to other elements or features as shown in the accompanying drawings. It will be understood that such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. For example, if the device in the accompanying drawings is turned over, an element described as "below" or "below" or "below" other elements or features will then be positioned as "above" the other elements or features. Thus, the example terms "below" and "below" can cover both above and below orientations. The device can be positioned otherwise (e.g., rotated 90 degrees or in other orientations), and the spatially relative descriptors used herein should be interpreted accordingly. In addition, it will be understood that when a layer is referred to as being "between" two layers, it can be the only layer between the two layers, or one or more intermediate layers can also be present.

[0052] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the present disclosure. As used herein, the terms "substantially," "about," and similar terms are used as terms of approximation rather than terms of degree, and are intended to account for the inherent deviations in measurements or calculations that one of ordinary skill in the art would recognize.

[0053] As used herein, unless the context clearly indicates otherwise, the singular forms "a" and "an (kind / one)" are also intended to include the plural forms. It will also be understood that the terms "including" and / or "comprising" when used in this specification indicate the presence of the stated features, wholes, steps, operations, elements, components and / or their groups, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or their groups. As used herein, the term "and / or" includes any and all combinations of one or more of the relevant listed items. When a statement such as "at least one (kind / one) of..." follows a list of elements, it modifies the entire list of elements without modifying the individual elements of the list. In addition, when describing embodiments of the present disclosure, the use of "can" refers to "one or more embodiments of the present disclosure." Moreover, the term "exemplary" is intended to refer to an example or illustration. As used herein, the term "using" and its variations may be considered to be synonymous with the term "utilizing" and its variations, respectively.

[0054] It will be understood that when an element or layer is referred to as being “on,” “connected to,” “coupled to,” or “adjacent” another element or layer, it can be directly on, directly connected to, directly coupled to, or directly adjacent to the other element or layer, or one or more intervening elements or layers may be present. In contrast, when an element or layer is referred to as being “directly on,” “directly connected to,” “directly coupled to,” or “directly adjacent to” another element or layer, there are no intervening elements or layers present.

[0055] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings, wherein the same or similar reference numerals are used for the same components in the accompanying drawings.

[0056] Figure 1 is a schematic block diagram of a display device according to one or more embodiments of the present disclosure. Figure 2 yes Figure 1 Schematic block diagram of the image corrector shown in .

[0057] Reference Figure 1 and Figure 2 , the display device 10 includes a processor 100 and a display unit 200 .

[0058] According to one or more embodiments, the display device 10 may be any one of a personal computer (PC), a smart phone, a tablet PC, a mobile Internet device (MID), an Internet tablet, an Internet of Things (IoT), an Internet of Everything (IOE) device, a desktop computer, a laptop computer, a workstation computer, and a personal digital assistant (PDA), but is not limited thereto.

[0059] The processor 100 may generate first image data DATA1 and a control signal CS for controlling driving of the display unit 200 , and may supply the first image data DATA1 and the control signal CS to the display unit 200 .

[0060] According to one or more embodiments, the processor 100 may be implemented as an application processor (AP), a mobile AP, a central processing unit (CPU), a graphics processing unit (GPU), or a processor capable of controlling the operation of the display unit 200, but is not limited thereto.

[0061] The display unit 200 may include an image corrector 210 , a timing controller 220 , a data driver 230 , a scan driver 240 , and a display panel 250 .

[0062] Image corrector 210 may receive first image data DATA1 and a control signal CS from processor 100 as input, and may generate second image data DATA2 based on the first image data DATA1. Image corrector 210 may also output the first image data DATA1 and the control signal CS together with the second image data DATA2. Here, first image data DATA1 may refer to image data corresponding to a first image displayed in a first area of ​​the display area of ​​display panel 250, and second image data DATA2 may refer to image data corresponding to a second image displayed in a second area of ​​the display area. In one or more embodiments, the second image may refer to an image generated by pixel-shifting the first image.

[0063] exist Figure 1 In FIG. 2 , the image corrector 210 is implemented inside the display unit 200 , however, according to one or more embodiments, the image corrector 210 may be implemented inside the processor 100 or may be implemented inside the timing controller 220 .

[0064] The image corrector 210 may include a frame data counter 212 , a shift determiner 214 , a region determiner 216 , and an image data generator 218 .

[0065] The frame data counter 212 may count the number of inputs of frames based on the control signal CS and may generate frame information CI including the number of inputs of frames.

[0066] According to one or more embodiments, the frame data counter 212 may count the number of input frames using the control signal CS. For example, the frame data counter 212 may count the number of input frames by determining the number of input vertical synchronization signals included in the control signal CS.

[0067] The shift determiner 214 may use the frame information CI to determine the shift direction and shift amount of the image, and may generate image shift information SI including the determined shift direction and shift amount of the image. For example, the shift determiner 214 may determine the X-axis shift direction, Y-axis shift direction, X-axis shift amount, and Y-axis shift amount of the image corresponding to the number of input frames. For convenience in describing this disclosure, the terms X-axis and Y-axis are used, but one or more embodiments are not limited to these terms, and the X-axis and Y-axis may be understood as relative directions that intersect with each other.

[0068] According to one or more embodiments, the shift determiner 214 may determine the shift direction and the shift amount of the image using a lookup table including the shift direction and the shift amount of the image set corresponding to the number of input frames.

[0069] The region determiner 216 may determine a second region in which the second image is displayed corresponding to the shift direction and the shift amount of the image included in the shift information SI of the image, and may generate region information AI for the second region.

[0070] For example, when the X-axis shift direction, the X-axis shift amount, the Y-axis shift direction, and the Y-axis shift amount are included in the shift information SI of the image, the region determiner 216 can determine the second region shifted from the first region along the X-axis direction and the Y-axis direction based on the X-axis shift direction, the X-axis shift amount, the Y-axis shift direction, and the Y-axis shift amount.

[0071] The region determiner 216 may also determine the second region by reducing or expanding the first region. For example, the second region may include a region smaller than or larger than (or equal to) the first region, and at least a portion of each of the first region and the second region may overlap each other.

[0072] In one or more embodiments, the region determiner 216 may determine the size of the second region differently for each frame. For example, when the first image data DATA1 of the first frame is provided to the image corrector 210, the region determiner 216 may determine the second region corresponding to the first region. When the first image data DATA1 of the second frame is provided to the image corrector 210, the region determiner 216 may determine the second region corresponding to a second region having a size different from that of the first region.

[0073] The image corrector 210 according to one or more embodiments of the present disclosure may shift an image fixedly displayed in a specific area by adjusting the size of an image displayed for each frame, thereby effectively preventing or reducing the occurrence of an afterimage in a specific area.

[0074] When the shift information SI of the image includes information in which the image is not shifted, the region determiner 216 may generate the region information AI for the first region without determining the second region.

[0075] The image data generator 218 may generate the second image data DATA2 based on the first image data DATA1 using the area information AI so that the first image displayed in the first area is shifted to the second area and displayed as the second image.

[0076] According to one or more embodiments, the image data generator 218 may generate second image data DATA2 for pixel line units based on the first image data DATA1. For example, the image corrector 210 may store the first image data DATA1 provided from the processor 100 in a line memory, and the image data generator 218 may read the first image data DATA1 from the line memory to generate second image data DATA2 for pixel line units.

[0077] When the region information AI includes information about the first region, the image data generator 218 may not separately generate the second image data DATA2 and may provide the first image data DATA1 to the timing controller 220 .

[0078] The timing controller 220 may receive the control signal CS and the first image data DATA1 and / or the second image data DATA2 from the image corrector 210 , and may generate a scan control signal SCS and a data control signal DCS using the control signal CS.

[0079] The data driver 230 may generate a data signal DS using the first image data DATA1 and / or the second image data DATA2 and the data control signal DCS provided from the timing controller 220. The data driver 230 may provide the data signal DS to the pixels through the data lines.

[0080] The scan driver 240 may generate a scan signal SS using the scan control signal SCS. The scan driver 240 may provide the scan signal SS to the pixels through the scan lines.

[0081] The display panel 250 may include pixels and may be implemented as an organic light emitting display panel, a liquid crystal display panel, or a plasma display panel, but is not limited thereto.

[0082] When the scan signal SS is supplied to the scan line, each of the pixels of a pixel row selected in horizontal units may receive a data signal DS from the data line and may emit light of brightness (eg, set or predetermined brightness) corresponding to the data signal DS.

[0083] Figure 3 is a conceptual diagram illustrating a display area of ​​a display panel according to one or more embodiments of the present disclosure. Figure 4 It shows the settings Figure 3 Conceptual diagram of pixels in the display area shown in .

[0084] Reference Figure 3 and Figure 4 The display panel 250 may include a display area DA capable of displaying an image IM and a non-display area NDA surrounding the display area DA. A user of the display panel 250 may visually recognize the image IM displayed on the display area DA.

[0085] The display area DA may include pixels PX arranged in an n×m matrix structure along the X-axis and the Y-axis. Each of n and m is a natural number. For example, when the resolution of the display panel 250 is 1920×1080, n may be 1920 and m may be 1080.

[0086] Each of the pixels PX may receive a data signal DS generated based on the first image data DATA1 and / or the second image data DATA2 , thereby emitting light with constant or substantially constant brightness.

[0087] The display area DA may include a plurality of pixels PX that emit light at brightness corresponding to the data signal DS.

[0088] For example, the display area DA may have a quadrilateral shape extending along the X-axis direction and the Y-axis direction.

[0089] In one or more embodiments, some images IM may include a scrolling area SCA in which subtitles, text information, etc. are shifted at high speed in at least some portions. For example, the scrolling area SCA may be positioned adjacent to one side of the display area DA. In some embodiments, the scrolling area SCA may extend along one side of the display area to be adjacent to some edges of the display area DA. The scrolling area SCA may be defined as an area in which a change in grayscale value per hour is sensed at a specific value (e.g., a set or predetermined specific value) or greater.

[0090] Figure 5 It shows Figure 4 Conceptual diagram of shifting of an image in a display area shown in .

[0091] exist Figure 5In the description, the shift of the image in the display area will be described based on the image shift in the first pixel shift drive which will be described later.

[0092] Figure 5 The shift path of the current frame image formed in the display area DA is shown. For example, the shift path of the current frame image may include a first path DI1 starting at a first point P1 and extending to a second point P2, and a second path DI2 starting at the second point P2 and extending to a third point P3.

[0093] In one or more embodiments, the first point P1 and the third point P3 may be located in the center of the display area DA, and the second point P2 may be located in an outer area of ​​the display area DA (e.g., an area along an edge or corner). In one or more embodiments, the first path DI1 and the second path DI2 may not overlap each other, and each of the first path DI1 and the second path DI2 may be formed in a maze shape surrounding each other.

[0094] The image corrector 210 may correct the first image data DATA1 into the second image data DATA2 using the shift information SI of the image provided from the shift determiner 214 so that the current frame image may be shifted along the first path DI1 and the second path DI2.

[0095] For example, whenever the second image data DATA2 is provided from the processor 100 , the display unit 200 may display the current frame image shifted along the arrow direction (eg, along the first path DI1 and / or the second path DI2 ).

[0096] For example, assuming that the center of the current frame image is displayed at the first point P1, whenever the second image data DATA2 is provided, the display unit 200 can shift the center of the current frame image along the first path DI1 to the second point P2 and display the center of the current frame image. In one or more embodiments, when the center of the current frame image is shifted to the second point P2, the display unit 200 can shift the center of the current frame image along the second path DI2 to the third point P3 and display the center of the current frame image. As described above, whenever the display unit 200 receives the second image data DATA2, the display unit 200 can shift the current frame image along the first path DI1 and the second path DI2 and display the current frame image.

[0097] In one or more embodiments, the current frame image may be shifted from the first point P1 to the second point P2 along a path different from the first path ID1 .

[0098] For example, when the pixel PX located in the center of the display area DA is severely degraded, the current frame image may be shifted from the first point P1 to the second point P2 along a path shorter than the first path ID1. In this case, the center of the current frame image may be shifted more quickly to the outer area of ​​the display area DA. As a result, the stress of the pixel PX located in the center area may be distributed more quickly to the pixels PX located in the outer area.

[0099] Therefore, the shift determiner 214 may determine the degree of degradation of the pixel PX, and as the degree of degradation becomes more severe (eg, increases), a shift path including a small number of paths may be determined as the shift path of the current frame image.

[0100] The shift path of the current frame of the above-mentioned image may be only an example, and various shift paths may be applied.

[0101] Figure 6 It shows Figure 4 Conceptual diagram of pixel blocks in the display area shown in .

[0102] Reference Figure 6 Each of the pixel blocks BLK in the display area DA includes a plurality of pixels PX. The display area DA may include pixel blocks BLK arranged in a j×i matrix along the X-axis and the Y-axis. For example, j is less than n and i is less than m. For example, the pixel blocks BLK may be in a (12 to 20)×(14 to 22) matrix structure.

[0103] The pixel block BLK may be set to include a certain number (eg, a set or predetermined number) of pixels PX. The pixels PX included in each pixel block BLK may be arranged in a matrix form.

[0104] The display device 10 may sense the sum of the grayscale values ​​or the sum of the luminance values ​​of the pixels PX included in each pixel block BLK. According to one or more embodiments of the present disclosure, the sum of the grayscale values ​​or the sum of the luminance values ​​of the pixels PX included in each pixel block BLK may be referred to as a block grayscale value.

[0105] The display device 10 may sense the block grayscale value by measuring the current or voltage flowing through the pixels PX included in each pixel block BLK. In one or more embodiments, the display device 10 may measure the hourly change rate of the block grayscale value.

[0106] One area of ​​interest IA including at least one pixel block BLK may be set in the display area DA. For example, the pixel blocks BLK included in the area of ​​interest IA may be arranged in a matrix form.

[0107] In one or more embodiments, the area of ​​interest IA may be located in an area adjacent to each edge of the display area DA. This embodiment shows that first to fourth areas of interest IA1 to IA4 located adjacent to four corners of the display area DA are set in the display area DA.

[0108] Some of the attention areas IA are set to include at least a portion of the scroll area SCA. For example, some of the attention areas IA (e.g., the first attention area IA1 and the second attention area IA2) may overlap with a position (or a portion of the display area DA) at the display area DA, where an image (e.g., a portion of the display area DA) is displayed. Figure 3 IM in the scroll area (for example, indicated by Figure 3 For example, the first and second areas of interest IA1 and IA2 positioned at the lower side of the display area DA (or adjacent to the lower edge of the display area DA) may overlap a position of the display area DA where the scroll area SCA is formed (or a portion of the display area DA).

[0109] Figure 7 is an algorithm flow chart schematically illustrating a method of driving a display device according to one or more embodiments of the present disclosure. Figure 8 and Figure 9 is a conceptual diagram illustrating an X-axis direction image shift according to one or more embodiments of the present disclosure. Figure 10 is a conceptual diagram illustrating a method of generating image data shifted in an X-axis direction according to one or more embodiments. Figure 11 and Figure 12 is a conceptual diagram illustrating Y-axis direction image shift according to one or more embodiments. Figure 13 is a conceptual diagram illustrating a method of generating image data shifted in the Y-axis direction according to one or more embodiments. Figure 14 It shows Figure 4 Conceptual diagram of shifting of an image in a display area shown in . Figure 15 is a conceptual diagram illustrating a method of generating image data shifted in an X-axis direction according to one or more embodiments.

[0110] Based on the first pixel shift drive which will be described later Figures 8 to 13 , based on the second pixel shift drive described later Figure 14 and Figure 15 .

[0111] Reference Figure 7, the method of driving the display device 10 includes the following steps: first pixel shift drive (S110); checking whether the change in the block grayscale value in the area of ​​interest IA is greater than or equal to a threshold value (e.g., a set or predetermined threshold value) (S120); and first pixel shift drive (S130) and second pixel shift drive (S140). In the present disclosure, although each step is described as being performed sequentially according to the flowchart, it is clear that unless the spirit of the disclosure is changed, some steps shown as being performed continuously may be performed in parallel (e.g., performed simultaneously), the order of each step may be changed, some steps may be omitted, or another step may be included between each step.

[0112] First, a first pixel shift driving S110 may be performed on the display device 10 .

[0113] In one or more embodiments of the present disclosure, the first pixel shift driving corresponds to a driving in which image shifting of a maximum range (e.g., a first range) is performed without loss of image information due to image expansion and / or image reduction. For example, in the first pixel shift driving, image shifting of a maximum range (e.g., a first range) is performed without loss of image information due to image expansion and / or image reduction.

[0114] In one or more embodiments of the present disclosure, the second pixel shift drive corresponds to a drive in which image information loss occurs in at least some areas due to image expansion and / or image reduction. The second pixel shift drive may be a drive in which image shifting is performed over a range smaller than the range of the first pixel shift drive (e.g., a second range), and image information loss occurs in at least some areas due to image expansion and / or image reduction, or image information loss occurs without image expansion and / or image reduction.

[0115] In the following, reference will be made to Figures 8 to 13 Description of First Pixel Shift Drive A description will be given based on image shifts in the X-axis direction and the Y-axis direction.

[0116] Reference Figure 8 and Figure 9 , the display device 10 may display the image IM on the display area DA during several frame periods. Here, the size of the image IM may be set to be smaller than or equal to the display area DA.

[0117] The image IM may include a plurality of regions. For example, the image IM may include a first region A1, a second region A2, and a third region A3. The first region A1, the second region A2, and the third region A3 may be arranged sequentially along the X-axis direction X. In other words, when determining the order along the X-axis direction X, the second region A2 may be an area disposed between the first region A1 and the third region A3. Figure 8 and Figure 9 In the perspective of , the first area A1 may be an area disposed on the left side of the second area A2, and the third area A3 may be an area disposed on the right side of the second area A2.

[0118] Here, the X-axis direction X may refer to a direction indicated by a straight line extending in one direction in the display area DA, and may also refer to a direction substantially orthogonal to the Y-axis direction Y. Figure 8 and Figure 9 In the viewing angle of , the X-axis direction X may be defined as a direction indicated by an arbitrary straight line extending from left to right. In some embodiments, the X-axis direction X may also be defined as a direction in which the columns of each pixel provided in the display area DA increase. Figure 8 and Figure 9 In the viewing angle of , the Y-axis direction Y may be defined as a direction indicated by an arbitrary straight line extending from the lower side to the upper side. In some embodiments, the Y-axis direction Y may also be defined as a direction in which the rows of each pixel provided in the display area DA increase.

[0119] Figure 8 schematically illustrates an image IM displayed on the display area DA during a first frame period, Figure 9 The image IM displayed on the display area DA during the second frame period is schematically shown.

[0120] Here, the first frame period may refer to a period in which at least one frame is displayed, and the second frame period is continuous with the first frame period and may refer to a period in which at least one frame is displayed.

[0121] The image IM displayed during the first frame period may be displayed in the second frame period in a form shifted in a direction opposite to the X-axis direction X. In other words, the first area A1, the third area A3, and the second area A2 of the image IM displayed during the first frame period may be displayed in the second frame period in a form in which some areas are modified.

[0122] For example, the first area A1 may be reduced in size in the second frame period in a direction opposite to the X-axis direction X, and the third area A3 may be expanded in the second frame period in a direction opposite to the X-axis direction X, compared to the first frame period. The second area A2 may be shifted in the second frame period in a direction opposite to the X-axis direction X, compared to the first frame period. However, the entire areas of the first area A1, the third area A3, and the second area A2 may remain substantially the same in the first frame period and the second frame period.

[0123] As described above, by expanding, reducing, and shifting the image IM for each region, occurrence of afterimages can be suppressed, and degradation of the display device 10 can be minimized or reduced.

[0124] Figure 8 and Figure 9 The embodiment shows the shift in the direction opposite to the X-axis direction X, but the shift in the X-axis direction X may be possible. In this case, the first area A1 may be expanded in the X-axis direction X, the third area A3 may be reduced in the X-axis direction X, and the second area A2 may be shifted in the X-axis direction X.

[0125] In one or more embodiments of the present disclosure, regions where the image is expanded or reduced by shifting the image (such as the first region A1 and the third region A3) are referred to as edge zoom regions. The fourth region A4 and the sixth region A6, which will be described later, also correspond to edge zoom regions.

[0126] Reference Figure 10 ,exist Figure 10 For the convenience of description, the pixels PX arranged in a matrix form (for example, see Figure 4 ). Here, the first X-axis image data XID1 may correspond to a portion of the first image data DATA1, and the second X-axis image data XID2 may correspond to a portion of the second image data DATA2.

[0127] The region determiner 216 may divide the image IM into pre-shift sub-regions SA1 , SA2 , and SA3 along the X-axis direction X. Here, the pre-shift X-axis region XA1 may include the pre-shift sub-regions SA1 , SA2 , and SA3 .

[0128] In one or more embodiments, the shifted X-axis area XA2 may include shifted sub-areas SB1 , SB2 , and SB3 corresponding to data of the image IM after shifting.

[0129] For example, the area determiner 216 can determine the image displayed from the leftmost pixel to the fifth pixel from the leftmost pixel in the right direction as the first area before shift SA1, can determine the image displayed from the rightmost pixel to the third pixel from the rightmost pixel in the left direction as the third area before shift SA3, and can determine the second area before shift SA2 positioned between the first area before shift SA1 and the third area before shift SA3.

[0130] The image data generator 218 may convert the first X-axis image data XID1 into second X-axis image data XID2 so that the first X-axis image data XID1 displaying the pre-shift sub-regions SA1 , SA2 , and SA3 displays the post-shift sub-regions SB1 , SB2 , and SB3 .

[0131] For example, the image data generator 218 may convert the first X-axis image data XID1 into the second X-axis image data XID2 so that the first X-axis image data XID1 displaying the pre-shift first area SA1 displays the post-shift first area SB1.

[0132] In one or more embodiments, the image data generator 218 may convert the first X-axis image data XID1 into the second X-axis image data XID2 so that the first X-axis image data XID1 displaying the pre-shift third area SA3 displays the post-shift third area SB3.

[0133] In one or more embodiments, the image data generator 218 may convert the first X-axis image data XID1 into the second X-axis image data XID2 so that the first X-axis image data XID1 displaying the pre-shift second area SA2 displays the post-shift second area SB2.

[0134] Hereinafter, the reduction of an image will be described in more detail.

[0135] The region determiner 216 may determine a post-shift first region SB1 that is reduced compared to the pre-shift first region SA1 using the shift information SI of the image including the shift direction and the shift amount generated by the shift determiner 214 .

[0136] For example, when the shift direction is set to a direction opposite to the X-axis direction X and the image shift amount is set to n (n is a natural number) pixel shift, the area determiner 216 can set a shifted first area SB1 that is reduced by n pixels relative to the pre-shifted first area SA1 in the direction opposite to the X-axis direction X.

[0137] Thereafter, in order to reduce the image, the image data generator 218 may convert the image displayed on p (p is a natural number) pixels PX of the first area SA1 before shifting into an image displayed on q (q is a natural number less than p) pixels PX of the first area SB1 after shifting.

[0138] For example, the image data generator 218 may convert data to be provided to p pixels PX into data to be provided to q pixels PX.

[0139] Since the image displayed on p pixels PX is displayed on q pixels PX, the image displayed in the first area SB1 after shifting can be reduced by a ratio of k relative to the image displayed in the first area SA1 before shifting and can be displayed accordingly (here, k=q / p).

[0140] Hereinafter, the enlargement of an image will be described in more detail.

[0141] The region determiner 216 may determine the post-shift third region SB3 expanded compared to the pre-shift third region SA3 using the shift information SI of the image including the shift direction and the shift amount generated by the shift determiner 214 .

[0142] For example, when the shift direction is set to a direction opposite to the X-axis direction X and the image shift amount is set to n (n is a natural number) pixel shift, the area determiner 216 can set a shifted third area SB3 that is expanded by n pixels compared to the pre-shifted third area SA3 in the direction opposite to the X-axis direction X.

[0143] Thereafter, in order to enlarge the image, the image data generator 218 may convert the image displayed on r (r is a natural number) pixels PX of the third area SA3 before shifting into an image displayed on s (s is a natural number greater than r) pixels PX of the third area SB3 after shifting.

[0144] For example, the image data generator 218 may convert data to be provided to r pixels PX into data to be provided to s pixels PX.

[0145] Since the image displayed on r pixels PX is displayed on s pixels PX, the image displayed in the shifted third area SB3 can be enlarged at a ratio of l relative to the image displayed in the pre-shifted third area SA3 and can be displayed (here, l=s / r).

[0146] Hereinafter, the shifting of the image will be described in more detail.

[0147] The region determiner 216 may determine a post-shift second region SB2 shifted from the pre-shift second region SA2 using the shift information SI of the image including the shift direction and the shift amount generated by the shift determiner 214 .

[0148] For example, when the shift direction is set to a direction opposite to the X-axis direction X and the image shift amount is set to n (n is a natural number) pixel shift, the area determiner 216 can set the shifted second area SB2 shifted by n pixels from the pre-shifted second area SA2 in the direction opposite to the X-axis direction X.

[0149] Thereafter, to shift the image, the image data generator 218 may convert the image displayed on t (t is a natural number) pixels PX of the pre-shift second area SA2 into the image displayed on t pixels PX of the post-shift second area SB2 to convert their positions.

[0150] Reference Figure 11 and Figure 12 , the display device 10 may display the image IM on the display area DA during several frame periods. Here, the size of the image IM may be set to be smaller than or equal to the display area DA.

[0151] The image IM may include a plurality of regions. For example, the image IM may include a fourth region A4, a fifth region A5, and a sixth region A6. The fourth region A4, the fifth region A5, and the sixth region A6 may be arranged sequentially along the Y-axis direction Y. In other words, when determining the order along the Y-axis direction Y, the fifth region A5 may be an area disposed between the fourth region A4 and the sixth region A6. Figure 11 and Figure 12 In the perspective of FIG, the fourth area A4 may be an area disposed above the fifth area A5, and the sixth area A6 may be an area disposed below the fifth area A5.

[0152] Figure 11 schematically illustrates an image IM displayed on the display area DA during a third frame period, Figure 12 The image IM displayed on the display area DA during the fourth frame period is schematically shown.

[0153] Here, the third frame period may refer to a period in which at least one frame is displayed, and the fourth frame period is continuous with the third frame period and may refer to a period in which at least one frame is displayed.

[0154] The image IM displayed during the third frame period may be displayed in the fourth frame period in the form of being shifted in the Y-axis direction Y. In other words, the fourth area A4, the fifth area A5, and the sixth area A6 of the image IM displayed during the third frame period may be displayed in the fourth frame period in the form of having some areas modified therein.

[0155] For example, the fourth area A4 may be reduced in the Y-axis direction Y during the fourth frame period compared to the third frame period, and the sixth area A6 may be expanded in the Y-axis direction Y during the fourth frame period compared to the third frame period. The fifth area A5 may be shifted in the Y-axis direction Y during the fourth frame period compared to the third frame period. However, the entire areas of the fourth area A4, the fifth area A5, and the sixth area A6 may remain substantially the same during the third and fourth frame periods.

[0156] As described above, by expanding, reducing, and shifting the image IM for each region, occurrence of afterimages can be suppressed, and degradation of the display device 10 (or the pixel PX) can be minimized or reduced.

[0157] Figure 11 and Figure 12 The embodiment shows a shift in the Y-axis direction Y, but a shift in the direction opposite to the Y-axis direction Y may be possible. In this case, the fourth area A4 may be expanded in the direction opposite to the Y-axis direction Y, the sixth area A6 may be reduced in the direction opposite to the Y-axis direction Y, and the fifth area A5 may be shifted in the direction opposite to the Y-axis direction Y.

[0158] exist Figure 13 For the convenience of description, the pixels PX arranged in a matrix form (for example, see Figure 4 ). Here, the first Y-axis image data YID1 may correspond to a portion of the first image data DATA1, and the second Y-axis image data YID2 may correspond to a portion of the second image data DATA2.

[0159] The region determiner 216 may divide the image IM into pre-shift sub-regions SA4 , SA5 , and SA6 along the Y-axis direction Y. Here, the pre-shift Y-axis region YA1 may include the pre-shift sub-regions SA4 , SA5 , and SA6 .

[0160] In one or more embodiments, the shifted Y-axis area YA2 may include shifted sub-areas SB4 , SB5 , and SB6 corresponding to data of the image IM after shifting.

[0161] For example, the area determiner 216 can determine the image displayed from the topmost pixel to the fifth pixel from the topmost pixel in the downward direction as the fourth area before shift SA4, can determine the image displayed from the bottommost pixel to the third pixel from the bottommost pixel in the upward direction as the sixth area before shift SA6, and can determine the fifth area before shift SA5 positioned between the fourth area before shift SA4 and the sixth area before shift SA6.

[0162] The image data generator 218 may convert the first Y-axis image data YID1 into second Y-axis image data YID2 so that the first Y-axis image data YID1 displaying the pre-shift sub-regions SA4 , SA5 , and SA6 displays the post-shift sub-regions SB4 , SB5 , and SB6 .

[0163] For example, the image data generator 218 may convert the first Y-axis image data YID1 into the second Y-axis image data YID2 so that the first Y-axis image data YID1 displaying the pre-shift fourth area SA4 displays the post-shift fourth area SB4.

[0164] In one or more embodiments, the image data generator 218 may convert the first Y-axis image data YID1 into the second Y-axis image data YID2 so that the first Y-axis image data YID1 displaying the pre-shift sixth area SA6 displays the post-shift sixth area SB6 .

[0165] In one or more embodiments, the image data generator 218 may convert the first Y-axis image data YID1 into the second Y-axis image data YID2 so that the first Y-axis image data YID1 displaying the pre-shift fifth area SA5 displays the post-shift fifth area SB5 .

[0166] Hereinafter, the reduction of an image will be described in more detail.

[0167] The region determiner 216 may determine a post-shift fourth region SB4 that is reduced compared to the pre-shift fourth region SA4 using the shift information SI of the image including the shift direction and the shift amount generated by the shift determiner 214 .

[0168] For example, when the shift direction is set to the Y-axis direction Y and the image shift amount is set to n (n is a natural number) pixel shift, the area determiner 216 can set the shifted fourth area SB4 to be reduced by n pixels in the Y-axis direction Y relative to the pre-shifted fourth area SA4.

[0169] Thereafter, in order to reduce the image, the image data generator 218 may convert the image displayed on p (p is a natural number) pixels PX of the fourth area SA4 before shifting into an image displayed on q (q is a natural number less than p) pixels PX of the fourth area SB4 after shifting.

[0170] For example, the image data generator 218 may convert data to be provided to p pixels PX into data to be provided to q pixels PX.

[0171] Since the image displayed on p pixels PX is displayed on q pixels PX, the image displayed in the fourth area SB4 after shifting can be reduced by a ratio of k relative to the image displayed in the fourth area SA4 before shifting and can be displayed accordingly (here, k=q / p).

[0172] Hereinafter, the enlargement of an image will be described in more detail.

[0173] The region determiner 216 may determine the post-shift sixth region SB6 expanded compared to the pre-shift sixth region SA6 using the shift information SI of the image including the shift direction and the shift amount generated by the shift determiner 214 .

[0174] For example, when the shift direction is set to the Y-axis direction Y and the image shift amount is set to n (n is a natural number) pixel shifts, the area determiner 216 can set the shifted sixth area SB6 that is expanded by n pixels in the Y-axis direction Y relative to the pre-shifted sixth area SA6.

[0175] Thereafter, in order to enlarge the image, the image data generator 218 may convert the image displayed on r (r is a natural number) pixels PX of the sixth area SA6 before shifting into an image displayed on s (s is a natural number greater than r) pixels PX of the sixth area SB6 after shifting.

[0176] For example, the image data generator 218 may convert data to be provided to r pixels PX into data to be provided to s pixels PX.

[0177] Since the image displayed on r pixels PX is displayed on s pixels PX, the image displayed in the sixth area SB6 after shifting can be enlarged at a ratio of l relative to the image displayed in the sixth area SA6 before shifting and can be displayed accordingly (here, l=s / r).

[0178] Hereinafter, the shifting of the image will be described in more detail.

[0179] The region determiner 216 may determine a post-shift fifth region SB5 shifted from the pre-shift fifth region SA5 using the shift information SI of the image including the shift direction and the shift amount generated by the shift determiner 214 .

[0180] For example, when the shift direction is set to the Y-axis direction Y and the image shift amount is set to n (n is a natural number) pixel shift, the area determiner 216 can set the shifted fifth area SB5 shifted by n pixels from the pre-shifted fifth area SA5 in the Y-axis direction Y.

[0181] Thereafter, in order to shift the image, the image data generator 218 may convert the image displayed on t (t is a natural number) pixels PX of the fifth area before shift SA5 into the image displayed on t pixels PX of the fifth area after shift SB5 to convert their positions.

[0182] In the first pixel shift drive, even if the image IM is expanded, reduced, and shifted for each region, since all image information is displayed, image information loss may not occur.

[0183] Refer again Figure 7 Next, a check may be performed on the display device 10 to see whether a change in the grayscale value of the blocks in the area of ​​interest IA is greater than or equal to a threshold value (eg, a set or predetermined threshold value) (S120).

[0184] The display device 10 can sense the change in block grayscale value per hour (hereinafter, block grayscale value change rate) in at least a portion of multiple focus areas IA, and can check whether the block grayscale value change rate is greater than or equal to a threshold (e.g., a set or predetermined threshold).

[0185] For example, when some images IM include a scroll area SCA, the block grayscale value change rate in at least one area of ​​interest IA may be greater than or equal to a threshold value. When some images IM do not include a scroll area SCA, the block grayscale value change rate may be less than a threshold value in all areas of interest IA (e.g., the first to fourth areas of interest IA1 to IA4).

[0186] When the block grayscale value change rate is less than the threshold value in all the areas of interest IA, the first pixel shift drive (S130) may be performed again. In the accompanying drawings, it is shown that each first pixel shift drive (S110 and S130) is performed based on checking whether the change in the block grayscale value in the area of ​​interest IA is greater than or equal to the threshold value (e.g., a set or predetermined threshold value) (S120). However, when the block grayscale value change rate is substantially less than the threshold value in all the areas of interest IA, after checking whether the change in the block grayscale value in the area of ​​interest IA is greater than or equal to the threshold value (e.g., a set or predetermined threshold value) (S120), the first pixel shift drive (S130) may be maintained before checking whether the change in the block grayscale value in the area of ​​interest IA is greater than or equal to the threshold value (e.g., a set or predetermined threshold value) (S120).

[0187] In one or more embodiments, when the block grayscale value change rate is greater than or equal to the threshold, the second pixel shift driving may be performed ( S140 ).

[0188] In some embodiments, in the second pixel shift driving, image shifting of a range smaller than that of the first pixel shift driving may be performed.

[0189] Reference Figure 14 , the shift path of the current frame image formed in the display area DA is as follows Figure 5 For example, the shift path of the current frame image may include a first path DI1' starting at the first point P1 and extending to the fourth point P4, and a second path DI2' starting at the fourth point P4 and extending to the third point P3.

[0190] Here, the first point P1 and the third point P3 may be positioned in the center region of the display area DA, and the fourth point P4 may be positioned in a region between the center and the outer edge of the display area DA. In one or more embodiments, the first path DI1' and the second path DI2' may not overlap each other, and each of the first path DI1' and the second path DI2' may be formed in a maze shape surrounding each other.

[0191] The image corrector 210 may correct the first image data DATA1 into the second image data DATA2 using the shift information SI of the image provided from the shift determiner 214 so that the current frame image may be shifted along the first path DI1 ′ and the second path DI2 ′.

[0192] In one or more embodiments, whenever the second image data DATA2 is provided from the processor 100 , the display unit 200 may display the current frame image shifted in the arrow direction.

[0193] For example, when it is assumed that the center of the current frame image is displayed at the first point P1, whenever the second image data DATA2 is provided, the display unit 200 can shift the center of the current frame image along the first path DI1' to the fourth point P4 and can display the center of the current frame image. In one or more embodiments, when the center of the current frame image is shifted to the fourth point P4, the display unit 200 can shift the center of the current frame image along the second path DI2' to the third point P3 to display the center of the current frame image. As described above, whenever the display unit 200 receives the second image data DATA2, the display unit 200 can shift the current frame image along the first path DI1' and the second path DI2' and display the current frame image.

[0194] Reference Figure 5 Together Figure 14 The fourth point P4 is closer to the center of the display area DA than the second point P2, and the first path DI1' and the second path DI2' in the second pixel shift driving are shorter than the first path DI1 and the second path DI2 in the first pixel shift driving.

[0195] In one or more embodiments, in the second pixel shift driving, image shifting may not be performed.

[0196] In the second pixel shift driving of some other embodiments, image information loss may occur in at least some areas due to the expansion of the image IM and the reduction of the image IM.

[0197] Reference Figure 15 , reduction of the image IM and expansion of the image IM in the second pixel shift drive will be described.

[0198] The region determiner 216 may determine a post-shift first region SB1 ′ that is reduced compared to the pre-shift first region SA1 using the shift information SI of the image including the shift direction and the shift amount generated by the shift determiner 214 .

[0199] For example, when the shift direction is set to a direction opposite to the X-axis direction X and the image shift amount is set to n (n is a natural number) pixel shift, the area determiner 216 can set a shifted first area SB1' that is reduced by n pixels relative to the pre-shifted first area SA1 in the direction opposite to the X-axis direction X.

[0200] Thereafter, in order to reduce the image, the image data generator 218 may convert some of the image IM displayed on the p (p is a natural number) pixels PX of the first area SA1 before shifting into the image IM displayed on the q (q is a natural number less than p) pixels PX of the first area SB1' after shifting. In other words, in the second pixel shifting drive, all of the image IM displayed on the p pixels PX of the first area SA1 before shifting may not be displayed on the q pixels PX.

[0201] For example, the image data generator 218 may convert some of the data to be provided to p pixels PX into data to be provided to q pixels PX.

[0202] Since the image displayed on the p pixels PX is displayed on the q pixels PX, only a portion of the image IM displayed in the first area SB1′ after the shift may be reduced and displayed compared to the image IM displayed in the first area SA1 before the shift, and the remaining portion may not be displayed. Therefore, image information loss may occur in the second pixel shift driving.

[0203] Hereinafter, the expansion of the image IM will be described in more detail.

[0204] The region determiner 216 may determine the post-shift third region SB3 ′ enlarged compared to the pre-shift third region SA3 using the shift information SI of the image including the shift direction and the shift amount generated by the shift determiner 214 .

[0205] For example, when the shift direction is set to a direction opposite to the X-axis direction X and the image shift amount is set to n (n is a natural number) pixel shift, the area determiner 216 can set a shifted third area SB3' that is expanded by n pixels relative to the pre-shifted third area SA3 in the direction opposite to the X-axis direction X.

[0206] Thereafter, in order to expand the image IM, the image data generator 218 may shift the image IM displayed on the r (r is a natural number) pixels PX of the third pre-shift area SA3, and then convert some of the image IM displayed on the r pixels PX of the third pre-shift area SA3 into the image IM displayed on the s (s is a natural number greater than r) pixels PX of the third post-shift area SB3'. In other words, in the second pixel shift drive, all of the image IM displayed on the r pixels PX of the third pre-shift area SA3 may not be displayed on the s pixels PX.

[0207] For example, the image data generator 218 may convert some of the data to be provided to r pixels PX into data to be provided to s pixels PX.

[0208] Since the image IM displayed on the r pixels PX is displayed on the s pixels PX, only a portion of the image IM displayed in the third area SB3′ after the shift can be enlarged and displayed accordingly compared to the image IM displayed in the third area SA3 before the shift, and the remaining portion is not displayed. Therefore, image information loss may occur in the second pixel shift drive.

[0209] In the second pixel shift driving of some other embodiments, only the shift of the image IM at the same level as the first pixel shift driving may be performed, and the reduction of the image IM and the expansion of the image IM may not be performed.

[0210] As shown in the drawings, the above-mentioned checking whether the change of the block grayscale value in the focus area IA is greater than or equal to the threshold (e.g., a set or predetermined threshold) (S120), the first pixel shift driving (S110) and the second pixel shift driving (S140) can be repeated.

[0211] Figure 16 is a conceptual diagram for describing a method of driving a display device according to a disclosed embodiment.

[0212] Figure 16 Show Figure 7 Some steps and the display area DA corresponding to these steps. Figure 16In the embodiment, details regarding checking whether a change in block grayscale values ​​in the area of ​​interest IA is greater than or equal to a threshold value (e.g., a set or predetermined threshold value) (S120) between each of the steps (e.g., S110, S120, S140) may not be repeated.

[0213] Reference Figure 16 , in the adjacent first pixel shift driving (S110) and (S130), the shift path of the image IM can be continuous. Even if the second pixel shift driving (S140) is performed between the adjacent first pixel shift driving (S110) and (S130), the shift path of the image IM in the two adjacent first pixel shift driving (S110) and (S130) can be continuous.

[0214] For example, when the shift path of the image IM starts at the first point P1 and stops at the fifth point P5 in the first pixel shift driving (S110), the shift path of the image IM may start at the fifth point P5 in the second pixel shift driving (S110).

[0215] In the second pixel shift drive (S140), the path may always start at a fixed point. In one or more embodiments, the second pixel shift drive may start at the same first point P1 as the first point P1 of the first pixel shift drive (S110). Here, the first point P1 is, for example, the point where the pixel located in the center of the display area DA is located.

[0216] For example, in the first pixel shift drive (S110), the shift path of the image IM may start at the first point P1 and may stop at the fifth point P5. Next, in the second pixel shift drive (S140), the shift path of the image IM may start at the first point P1. Next, in the second first pixel shift drive (S130), the shift path of the image IM may start at the fifth point P5, regardless of the position of the stop point of the shift path of the image IM in the previous second pixel shift drive (S140).

[0217] For example, the position information of the starting point (e.g., first position information) and the position information of the stopping point (e.g., second position information) for the shift path in the first pixel shift drive (S110) may be stored in the display device 10. The position information of the starting point and the position information of the stopping point may be used as the starting point for the shift path in the second pixel shift drive (S140) and the next first pixel shift drive (S130), respectively.

[0218] Hereinafter, various embodiments of the second pixel shift driving will be described with reference to [Table 1].

[0219] Table 1

[0220]

[0221] As described above, the second pixel shift drive (S140) can be divided based on the first pixel shift drive (e.g., (S110), (S130)). The following embodiment is described based on the fact that the shift range of the image IM has the maximum value in the first pixel shift drive and the area reduced or expanded in the edge zoom region is the entire area. In the first embodiment, the second pixel shift drive may be a drive in which the shift range of the image IM is the same as the shift range of the image IM in the first pixel shift drive and only image shifting is performed without reducing or expanding the area in the edge zoom region.

[0222] In the second embodiment, the second pixel shift driving may be driving in which the shift range of the image IM is smaller than that in the first pixel shift driving and the area reduced or expanded in the edge zoom area is the entire area.

[0223] In the third embodiment, the second pixel shifting drive may be a drive in which the shift range of the image IM is the same as that of the image IM in the first pixel shifting drive and some areas of the edge zoom area are reduced or expanded.

[0224] In the fourth embodiment, the second pixel shifting drive may be a drive in which the shift range of the image IM is smaller than that of the first pixel shifting drive and only image shifting is performed without reducing or expanding the area in the edge zoom area.

[0225] In the fifth embodiment, the second pixel shift driving may be a driving in which the shift range of the image IM is smaller than the first pixel shift driving and some areas of the edge zoom area are reduced or expanded.

[0226] When the display device 10 is driven in the method according to the above-described embodiment, even if the image IM to be displayed includes a scrolling area SCA in which subtitles, text information, etc. are shifted at high speed, degradation of the pixels PX can be minimized or reduced, and visual recognition of afterimages to the user can also be minimized or reduced.

[0227] Next, a display device 10 and a method of driving the display device 10 according to still another embodiment will be described. Figures 1 to 16 The same components are described in the drawings and the same Figures 1 to 16 The same components will be labeled with the same or similar reference numerals.

[0228] Figure 17 is a conceptual diagram illustrating a pixel block in a display device according to still another embodiment.

[0229] Reference Figure 17 , this embodiment and Figure 6 The embodiment of the present invention may be different in that the first to fourth areas of interest IA1_1 to IA4_1 are positioned to contact the four corners of the display area DA. Figure 17 In the embodiment, each of the first to fourth areas of interest IA1_1 to IA4_1 may include at least one corner among four corners of the display area DA.

[0230] Figure 18 is a conceptual diagram illustrating a pixel block in a display device according to still another embodiment.

[0231] Reference Figure 18 , this embodiment and Figure 6 The embodiment of the present invention may differ in that the defined area of ​​interest IA includes a first area of ​​interest IA1_1 and a second area of ​​interest IA2_2, each of which is positioned to contact at least two corners and at least one side of the display area DA. For example, each of the first area of ​​interest IA1_1 and the second area of ​​interest IA2_2 may be positioned to fully contact at least two corners and at least one side of the display area DA along the Y-axis direction Y, and may partially contact at least two sides of the display area DA along the X-axis direction X.

[0232] Apart from Figure 6 、 Figure 17 and Figure 18 The area of ​​interest IA may be set to have various shapes other than those shown in .

[0233] Although the embodiments of the present disclosure have been described with reference to the accompanying drawings, it will be understood by those skilled in the art that the embodiments may be implemented in other specific forms without changing the technical spirit and essential features of the disclosure. Therefore, it should be understood that the above embodiments are illustrative in all aspects and not restrictive.

Claims

1. A method for driving a display device including a display area for displaying an image, the method comprising the following steps: performing a first pixel shift drive by shifting an image by a first range in the display area without loss of image information due to expansion or reduction of the image; checking whether a change in a block grayscale value in a focus area of ​​the display area is greater than or equal to a threshold; as well as performing a second pixel shift drive by shifting the image with the loss of image information by the first range or a second range, the second range being smaller than the first range, The step of checking whether the change in the block grayscale value in the target area is greater than or equal to the threshold comprises: performing the second pixel shift drive when the change in the block grayscale value is greater than or equal to the threshold.

2. The method according to claim 1, wherein The step of checking whether the change in the grayscale value of the block in the target area is greater than or equal to the threshold further comprises the following steps: When the change in the block grayscale value is less than the threshold, a second first pixel shift drive is performed.

3. The method according to claim 2, further comprising the steps of: After the second pixel shift drive, performing the step of checking whether the change in the block grayscale value in the target area is greater than or equal to the threshold, and The second first pixel shift driving is performed.

4. The method according to claim 3, wherein: In the first pixel shift drive, the image shift starts at a first point and stops at a second point. In the second pixel shift drive, the image shift starts at the first point and stops at a third point, and In the second first pixel shift driving, the image shift starts at the second point.

5. The method according to claim 1, wherein The image is not enlarged or reduced in the second pixel shift driving.

6. The method according to claim 1, wherein The display area includes an edge zoom area that is enlarged or reduced by the image shifting by the second pixel shifting drive.

7. The method according to claim 1, wherein The image includes a scrolling area in which subtitles or text information are shifted in at least some portions, wherein the area of ​​interest is positioned to include at least a portion of the scrolling area, and When the subtitle or the text information shifts in the focus area, the change in the block grayscale value is greater than or equal to the threshold.

8. The method according to claim 1, wherein In the second pixel shift drive, after the image of the second range is shifted, a portion of a first area of ​​the image before shifting is reduced or expanded and displayed, and the remaining portion of the first area is not displayed.

9. A display device, comprising: an image corrector configured to generate second image data based on the first image data; a data driver configured to generate a data signal based on the first image data or the second image data; as well as The display panel includes a display area for displaying an image, wherein the display area includes pixels that emit light at a brightness corresponding to the data signal. wherein the display panel performs a first pixel shift drive by shifting an image by a first range in the display area without loss of image information due to expansion or reduction of the image, and performs a second pixel shift drive with the loss of image information, and When a change in a block grayscale value in a focus area in the display area is greater than or equal to a threshold, the second pixel shift drive is performed.

10. The display device according to claim 9, wherein The image corrector corrects the first image data to generate the second image data and performs an image shift on the image along a shift path, and The image corrector includes: a shift determiner configured to determine a shift direction and a shift amount of the image; and a region determiner configured to determine a region in which the image is enlarged or reduced.

Images