Display device

Abstract

Disclosed is a display device including a display portion, a display driver, a touch sensing portion, and a touch driver. The display portion includes data lines, scan lines, and pixels connected to the data lines and the scan lines. The display driver supplies a data signal to the data lines and sequentially supplies a scan signal to the scan lines. The touch sensing portion includes sensing electrodes. The touch driver senses a touch input based on a change in capacitance between the sensing electrodes and calculates a moving speed of the touch input. When the moving speed of the touch input is greater than a reference speed, a first period in a frame period is reduced, wherein a frame image is displayed in the frame period and the scan signal and the data signal are supplied in the first period.

Description

[0001] Cross-references to related applications

[0002] This application claims priority to Korean Patent Application No. 10-2019-0043923, filed on April 15, 2019, and all rights arising therefrom, the contents of which are incorporated herein by reference in their entirety. Technical Field

[0003] This disclosure relates to a display device and a method for driving the display device. Background Technology

[0004] Display devices typically include a display panel and drivers. The display panel may include scan lines, data lines, and pixels. The drivers may include a scan driver for sequentially providing scan signals to the scan lines and a data driver for providing data signals to the data lines. Each pixel may emit light at a brightness corresponding to the data signal provided via the corresponding scan line in response to the scan signal provided via the corresponding scan line.

[0005] Such a display device may also include a touch panel and a touch driver, through which touch input is detected and a screen corresponding to the touch input is displayed. Summary of the Invention

[0006] When a scrolling screen is displayed via touch input (in which the screen moves in a specific direction), screen anomalies (e.g., image dragging) may occur due to a mismatch between the previous frame image displayed by the display device and the reproduced current frame image, and the display quality may degrade.

[0007] Embodiments of this disclosure relate to a display device with improved display quality and a method for driving the display device.

[0008] In embodiments of this disclosure, the display device includes: a display portion including data lines, scan lines, and pixels connected to the data lines and scan lines; a display driver providing data signals to the data lines and sequentially providing scan signals to the scan lines; a touch sensing portion including sensing electrodes; and a touch driver sensing touch input based on changes in capacitance between the sensing electrodes and calculating the movement speed of the touch input. In such an embodiment, when the movement speed of the touch input is greater than a reference speed, a first time period in the frame period is reduced, wherein a frame image is displayed in the frame period, and the scan signals and data signals are provided in the first time period.

[0009] According to an embodiment, each of the scan signals can be synchronized with a horizontal synchronization signal, a period of the horizontal synchronization signal can be decreased when a moving speed of the touch input is greater than a reference speed, and the horizontal synchronization signal can define a start of each of data lines included in frame data corresponding to a frame image.

[0010] According to an embodiment, the display apparatus can further include a processor generating the horizontal synchronization signal. In such an embodiment, the touch driver can provide the processor with the sense signal when the moving speed of the touch input is greater than the reference speed, and the processor can decrease the period of the horizontal synchronization signal based on the sense signal.

[0011] According to an embodiment, an update rate of the frame image can be constant.

[0012] According to an embodiment, the first period can be in a range of about 80% to 90% of a reference time when the moving speed of the touch input is greater than the reference speed, and the reference time can be a period in which the scan signal and the data signal are provided when the moving speed of the touch input is less than the reference speed.

[0013] According to an embodiment, a switching speed of the data signal can be increased in a frame period when the moving speed of the touch input is greater than the reference speed.

[0014] According to an embodiment, the frame period can include a second period between a first period of the frame period and a first period of an adjacent frame period, the adjacent frame period can be a frame period adjacent to the frame period, and the second period can be increased when the moving speed of the touch input is greater than the reference speed.

[0015] According to an embodiment, the frame period can include a second period between a first period of the frame period and a first period of an adjacent frame period, the adjacent frame period can be a frame period adjacent to the frame period, and the second period can be constant or decreased.

[0016] According to an embodiment, the display portion can further include a light emission control line, the display driver can sequentially provide a light emission control signal to the light emission control line, and the pixel can be connected to the light emission control line and sequentially emit light based on the light emission control signal.

[0017] According to an embodiment, the data line can extend in a first direction and can be arranged along a second direction intersecting the first direction, the scan line can extend in the second direction and can be arranged along the first direction, and the display portion can be foldable based on a folding axis extending in the second direction.

[0018] According to an embodiment, the scan signals can be sequentially provided to the scan lines along the first direction, and the pixels can sequentially emit light in response to the scan signals.

[0019] According to an embodiment, the touch driver can calculate a moving speed of the touch input, and the moving speed can be a speed of the touch input in the second direction.

[0020] In an embodiment of the disclosure, a display apparatus includes a display part including data lines, scan lines, and pixels connected to the data lines and the scan lines, wherein the display part displays frame images through the pixels; a display driver providing data signals to the data lines and sequentially providing scan signals to the scan lines; a touch sensing part including sensing electrodes; a touch driver sensing a touch input based on a change in capacitance between the sensing electrodes and generating a sensing signal when a moving speed of the touch input is greater than a reference speed; and a processor changing an update rate of the frame images based on the sensing signal.

[0021] According to an embodiment, wherein a frame period in which the frame images are displayed can include a first period in which the scan signals and the data signals are provided and a second period between the first period and a first period of an adjacent frame period, the adjacent frame period can be a frame period adjacent to the frame period, and the processor can reduce the first period.

[0022] According to an embodiment, the processor can reduce the second period.

[0023] According to an embodiment, wherein a frame period in which the frame images are displayed can include a first period in which the scan signals and the data signals are provided and a second period between the first period and a first period of an adjacent frame period, the adjacent frame period can be a frame period adjacent to the frame period, and the processor can reduce the second period.

[0024] According to an embodiment, the scan signals can be sequentially provided along the first direction, the touch driver can generate the sensing signal when the moving speed of the touch input in the second direction is greater than the reference speed, and the second direction can intersect the first direction.

[0025] In an embodiment of the disclosure, a method of driving a display apparatus includes sensing a touch input through a touch sensing part of the display apparatus; determining whether a moving speed of the touch input is greater than a reference speed through the touch sensing part; increasing an edge period when the moving speed of the touch input is greater than the reference speed in a processor; and displaying frame images on a display part of the display apparatus based on the edge period. In such an embodiment, a second frame image of the frame images is started to be displayed at a point in time at which an elapse of the edge period from a point in time at which a first frame image of the frame images is ended to be displayed.

[0026] According to an embodiment, the update rate of the frame images can be constant.

[0027] According to an embodiment, increasing the edge period can further include decreasing an update rate of each corresponding frame data in the frame images.

[0028] In an embodiment of the disclosure, a display apparatus includes a display portion including data lines, scan lines, and pixels connected to the data lines and the scan lines, wherein the display portion displays frame images through the pixels; a display driver that provides a data signal to the data lines and sequentially provides a scan signal to the scan lines; a sensor that generates posture information by sensing a posture or a rotation of the display portion; and a processor that changes an edge period of the frame images based on the posture information. In such an embodiment, the edge period is a period between a time point at which a first frame image of the frame images ends being displayed and a time point at which a second frame image starts being displayed, wherein the second frame image is adjacent to the first frame image.

[0029] According to an embodiment, the processor can determine a screen orientation based on the posture information, increase the edge period when the screen orientation is a first screen orientation, and the screen orientation can be a direction in which an upper portion or a lower portion of each of the frame images is positioned with respect to the display portion.

[0030] According to an embodiment, the scan lines can be arranged along a first direction, each of the scan lines can extend in a second direction, and the first screen orientation can be in the second direction.

[0031] According to an embodiment of the display apparatus and the method of driving the display apparatus, when displaying an image corresponding to a screen scrolling, a width of a frame period in which one frame image is displayed is constantly maintained, and an edge period is increased. Accordingly, in such an embodiment, a display period in the frame period can be decreased, a data signal can be updated or switched faster during the decreased display period, and one complete frame image can be displayed faster. In such an embodiment, a screen abnormality recognized by a user visually when displaying a scrolling screen can be reduced, and display quality can be improved.

[0032] In such an embodiment, the display apparatus and the method of driving the display apparatus can minimize an increase in power consumption by fixing a width of a frame period and decreasing only a display period. BRIEF DESCRIPTION OF DRAWINGS

[0033] The above and other features of the present application will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings in which:

[0034] Figure 1 is a view illustrating a display apparatus according to an embodiment of the disclosure;

[0035] Figures 2A-2D is a diagram showing a display device in a plurality of states; Figure 1

[0036] Figure 3 is a plan view showing an exemplary embodiment of a display device of Figure 1

[0037] Figure 4 is a cross-sectional view showing an exemplary embodiment of a display panel included in a display device of Figure 3

[0038] Figure 5 is a block diagram showing an exemplary embodiment of a display device of Figure 3

[0039] Figure 6 is a circuit diagram showing an exemplary embodiment of a pixel included in a display device of Figure 5

[0040] Figure 7 is a diagram showing an exemplary embodiment of a display device of Figure 3

[0041] Figure 8 is a diagram showing an operation of a touch driver included in a display device of Figure 7

[0042] Figure 9 is a signal timing diagram showing an exemplary embodiment of a signal in a display device of Figure 3

[0043] Figure 10 is a signal timing diagram showing an alternative exemplary embodiment of a signal in a display device of Figure 3

[0044] Figure 11 is a signal timing diagram showing another alternative exemplary embodiment of a signal measured in a display device of Figure 3

[0045] Figure 12 is a diagram showing an exemplary embodiment of an image displayed on a display device of Figure 3

[0046] Figure 13 is a flowchart showing a method of driving a display device according to an embodiment of the present disclosure;

[0047] Figure 14 is a flowchart showing a method of driving a display device according to an alternative embodiment of the present disclosure; and ​​​​​​​​​​​

[0048] Figure 15 FIG. 12 is a flowchart illustrating a method of driving a display apparatus according to another alternative embodiment of the present disclosure. DETAILED DESCRIPTION

[0049] The present application will now be described more fully with reference to the accompanying drawings, in which various embodiments of the application are shown. The application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the application to those skilled in the art. Like reference numerals refer to like elements throughout the specification.

[0050] It will be understood that when an element is referred to as being "on" another element, it can be directly on the other element or intervening elements can be present. In contrast, when an element is referred to as being "directly on" another element, there are no intervening elements present.

[0051] It will be understood that, although the terms "first", "second", "third", etc. can be used herein to describe various elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, "a first element", "a first component", "a first region", "a first layer" or "a first section" discussed below could be termed a second element, a second component, a second region, a second layer or a second section.

[0052] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms, including "at least one", unless the content clearly indicates otherwise. "Or" means "and / or". "At least one of A and B" means "A and / or B". As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items. It will be understood that the terms "comprises" and / or "comprising", or "includes" and / or "including" when used in this specification, specify the presence of stated features, regions, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, regions, integers, steps, operations, elements, components, and / or groups thereof.

[0053] Furthermore, relative terms such as "lower" or "bottom" and "upper" or "top" are used herein to describe one element's relationship to another element as the device is oriented in the figures. It will be understood that relative terms are intended to encompass different orientations of the device in addition to the orientation depicted in the figures. For example, if the device in one of the figures is turned over, elements described as being on the "lower" side of other elements would then be oriented on the "upper" sides of the other elements. The exemplary term "lower" can therefore encompass both an orientation of lower and upper, depending on the particular orientation of the figure. Similarly, if the device in one of the figures is turned over, elements described as "below" or "beneath" other elements would then be oriented "above" the other elements. The exemplary terms "below" or "beneath" can, therefore, encompass both an orientation of above and below. The exemplary terms "above" or "over" can, therefore, encompass both an orientation of above and below.

[0054] As used herein, "about" or "approximately" means an amount that is within a reasonable range of the stated value, as would be understood by one of ordinary skill in the art considering the measurement in question and the error inherent in the measurement system (i.e., the limitations of the measurement system).

[0055] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and the present disclosure and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

[0056] Exemplary embodiments are described herein with reference to cross-sectional illustrations that are schematic illustrations of idealized embodiments. As such, deviations from the shapes of the illustrations as a result, for example, of manufacturing techniques and / or tolerances, are to be expected. Thus, embodiments described herein are not intended to be limited to the precise shapes as illustrated in the figures, but are to include deviations in shapes that result from, for example, manufacturing. For example, a region illustrated or described as flat can often have rough and / or non-linear features. Moreover, an illustrated sharp corner can be rounded. Thus, the regions illustrated in the figures are schematic and are not intended to indicate the precise shape of a region, and are not intended to limit the scope of the present claims.

[0057] Hereinafter, embodiments of the present application will be described in detail with reference to the accompanying drawings.

[0058] Figure 1 FIG. 1 is a diagram illustrating a display device according to an embodiment of the present disclosure.

[0059] Reference Figure 1Embodiments of the display device 100 include a display area DA.

[0060] The display area DA can receive a data signal corresponding to image data, and display an image corresponding to the data signal. In such embodiments, the display area DA can sense a touch input (e.g., a touch input by a user's finger, a touch member, etc.).

[0061] The display device 100 can have a rectangular shape in a plan view. Herein, the term "in a plan view" can mean "when viewed from a plan view in a thickness direction of the display device 100". The display device 100 can include opposite long sides (e.g., a first long side LSI and a second long side LS2 extending in a second direction DR2) and opposite short sides (e.g., a first short side SSI and a second short side SS2 extending in a first direction DR1). Corners of the display device 100 where the long sides LSI and LS2 and the short sides SSI and SS2 intersect can be right-angled, but the present disclosure is not limited thereto. In alternative embodiments, the corners can be curved or rounded. The planar shape of the display device 100 is not limited to the shape shown in FIG. 1, but can be variously modified, e.g., having a circular shape or some other shape. Figure 1

[0062] The display device 100 can be a flexible display device. In one embodiment, for example, at least one area of the display device 100 can be flexible, such that the display device 100 can be bendable, foldable, and / or rollable.

[0063] In embodiments, in an un-deformed state (e.g., in a flatly stretched state), the display device 100 can effectively display an image in the entire display area DA. In such embodiments, in a deformed state (e.g., in a bent state, a folded state, and / or a rolled state), the display device 100 can display an image in only a portion (e.g., a portion exposed to a user) of the display area DA.

[0064] Figures 2A-2D is a diagram showing a display device in a plurality of states. FIG. 1 shows a display device in an unfolded state, Figure 1 is a diagram showing a display device in a plurality of states. FIG. 1 shows a display device in an unfolded state, Figures 2A-2D is a diagram showing a display device in a plurality of states. FIG. 1 shows a display device in an unfolded state,

[0065] Reference will first be made to Figure 1 and Figure 2A ​In an embodiment, the display device 100 can be inwardly foldable. For example, the display device 100 can be folded such that the display area DA faces inward with respect to the first folding axis FA1. The first folding axis FA1 can be perpendicular or intersect with the opposite sides (e.g., the first short side SS1 and the second short side SS2) of the display device 100, but is not limited thereto.

[0066] In such an embodiment, the display device 100 can be an inwardly foldable display device. However, embodiments of the display device 100 are not limited thereto.

[0067] Referring to Figure 1 and Figure 2B Embodiments of the display device 100 can be outwardly foldable. For example, the display device 100 can be outwardly folded such that the display area DA faces outward with respect to the first folding axis FA1. In such an embodiment, an image is displayed through the front surface of the display device 100, and the rear surfaces of the display device 100 can be relatively adjacent to or in contact with each other when the display device 100 is folded. In such an embodiment, the display device 100 can be an outwardly foldable display device.

[0068] In an embodiment, the display device 100 can be folded at a plurality of mutually different areas.

[0069] Referring to Figure 2C Embodiments of the display device 100 can be inwardly folded such that the display area DA faces inward with respect to the first folding axis FA1 and the second folding axis FA2.

[0070] Referring to Figure 2D Embodiments of the display device 100 can be folded such that the display area DA faces inward with respect to the first folding axis FA1, and can also be folded such that the display area DA faces outward with respect to the second folding axis FA2.

[0071] In an alternative embodiment, although not shown, the display device 100 can be a rollable display device. For example, the display device 100 can be rolled such that the display area DA faces outward or such that the display area DA faces inward. In such an embodiment, at least one area of the display device 100 can be rolled, and there is no particular limitation on the rolling direction.

[0072] Figure 3 is a plan view showing an exemplary embodiment of the display device of Figure 1

[0073] Referring to Figure 1 and Figure 3 ​Embodiments of the display device 100 can include a display panel 110 (or a panel), a display driver, a touch driver 210, a processor 300, and a sensor 400 (or a gesture sensor). In such embodiments, the display device 100 can further include a flexible printed circuit board FPC and a main circuit board MFPC.

[0074] The display panel 110 can be a flexible display panel. In such embodiments, the display panel 110 can be configured to be bendable, foldable, and / or rollable. In embodiments, as described above with reference to FIG. 1A, the display panel 110 can be inwardly folded with respect to the first folding axis FA1. However, such embodiments are merely exemplary, and embodiments of the display panel 110 are not limited thereto. Figure 2A

[0075] The display panel 110 can include a display area DA for displaying an image and a non-display area NDA outside the display area DA. In embodiments, the display panel 110 can include pixels disposed in the display area DA. In such embodiments, the display panel 110 can include a sensing electrode for sensing a touch input. The display panel 110 will be described in greater detail later with reference to FIGS. 2A and 2B. Figure 4

[0076] The display driver can include a first driver 120 and a second driver 130.

[0077] In embodiments, the first driver 120 can receive a control signal and input data (or original image data) from the processor 300, generate a data signal based on the control signal and the input data, and provide the data signal to the display panel 110. In such embodiments, the first driver 120 can generate a scan control signal (and a light emission control signal) based on the control signal, and can provide the scan control signal to the second driver 130.

[0078] The first driver 120 can be implemented as an integrated circuit, can be mounted on the flexible printed circuit board FPC (or mounted on a circuit film (not shown) and connected to the flexible printed circuit board FPC), and can be connected to the display panel 110.

[0079] The first driver 120 (and the flexible printed circuit board FPC) can be disposed adjacent to one long side (e.g., the second long side LS2 (refer to FIG. 1A) of the display device 100) of the display panel 110, and can be connected or coupled to the one long side of the display panel 110. Figure 1

[0080] ​​​In an embodiment, the second driver 130 can sequentially generate scan signals based on a scan control signal and provide the scan signals to the display panel 110. The second driver 130 can include a first sub-driver 131 and a second sub-driver 132. The first sub-driver 131 can be disposed adjacent to one short side (e.g., the first short side SS1 (refer to Figure 1 )) of the display panel 110 (e.g., the first short side SS1 of the display device 100), and the second sub-driver 132 can be disposed adjacent to the other short side (e.g., the second short side SS2 (refer to Figure 1 )) of the display panel 110 (e.g., the second short side SS2 of the display device 100).

[0081] In an embodiment, when the second driver 130 receives a light emission driving control signal, the second driver 130 can generate a light emission control signal based on the light emission driving control signal and provide the light emission control signal to the display panel 110. In an embodiment, the display panel 110 can receive a data signal in response to the scan signal and display an image corresponding to the data signal in response to the light emission control signal.

[0082] In one embodiment, for example, the first sub-driver 131 can be a scan driver for generating a scan signal, and the second sub-driver 132 can be a light emission driver for generating a light emission control signal. In an alternative embodiment, for example, each of the first sub-driver 131 and the second sub-driver 132 can include a scan driver and a light emission driver.

[0083] The second driver 130 (or the second driving circuit) can be disposed in the non-display area NDA of the display panel 110. However, the first driver 120 and the second driver 130 are not limited thereto.

[0084] The touch driver 210 can generate a touch driving signal, provide the touch driving signal to the display panel 110 (or a sensing electrode included in the display panel 110), receive a sensing signal corresponding to the touch driving signal, and sense a touch input based on the sensing signal. In one embodiment, for example, the touch driver 210 can sense a touch input based on a change in capacitance between sensing electrodes included in the display panel 110. In an embodiment, the touch driver 210 can provide information (e.g., a size, a coordinate, etc. of a touch input) related to the sensed touch input to the processor 300.

[0085] In an embodiment, the touch driver 210 can calculate a moving speed of the touch input, and determine whether the moving speed of the touch input is greater than a reference speed. In such an embodiment, when the moving speed of the touch input is greater than the reference speed, the touch driver 210 can provide a sensing signal (or sensing information) to the processor 300. Here, the sensing signal indicates whether the moving speed of the touch input is greater than the reference speed, and can indicate a magnitude, a direction, etc. of the moving speed. Herein, the moving speed of the touch input represents a distance between positions of the touch input per unit time.

[0086] Reference will be made later to Figure 7 and Figure 8 The touch driver 210 will be described in more detail.

[0087] The touch driver 210 can be implemented as an integrated circuit, can be mounted on a main circuit board MFPC, and can be connected to the display panel 110 through a flexible printed circuit board FPC.

[0088] The processor 300 can generate a control signal and input data, and provide the control signal and the input data to the display driver (or the first driver 120) through the main circuit board MFPC. In an embodiment, the processor 300 can generate the input data based on information about the touch input provided from the touch driver 210.

[0089] In an embodiment, the processor 300 can generate the control signal based on the sensing signal provided from the touch driver 210. In one embodiment, for example, when the processor 300 receives the sensing signal indicating that the moving speed of the touch input is greater than the reference speed, the processor 300 can determine that the user is rapidly scrolling an image (or a screen) displayed in the display area DA of the display panel 110, and can adjust a driving setting value (i.e., a control signal) of the display driver. In one embodiment, for example, when the moving speed of the touch input is greater than the reference speed, the processor 300 can decrease a display period (i.e., a duration in a frame period during which an image is displayed through the display panel 110). In the display period, a data signal and a scan signal (and a light emission control signal) can be provided to the display panel 110. In an alternative embodiment, for example, when the moving speed of the touch input is greater than the reference speed, the processor 300 can increase a porch period (i.e., a duration of time between two adjacent display periods).

[0090] In an embodiment, the display apparatus 100 can sequentially display frame images, and wherein a frame period in which one frame image is displayed (or allocated for displaying one frame image) can include a display period (or an active period) and a margin period (or a vertical margin period). A start of the frame period (or a start of frame data corresponding to the frame period) can be defined or determined by a vertical synchronization signal (VSYNC) in Figure 9 , and a start of a data line included in the frame data can be defined or determined by a horizontal synchronization signal (HSYNC) in Figure 9 . The display period of the frame period can vary by a period (or frequency) of the horizontal synchronization signal HSYNC, and the margin period can vary by a period of the horizontal synchronization signal HSYNC and a period (or frequency) of the vertical synchronization signal VSYNC. In one embodiment, for example, as the period of the horizontal synchronization signal HSYNC decreases, the display period can decrease and the margin period can increase when the period of the vertical synchronization signal VSYNC is constant or fixed.

[0091] The variation of the display period and / or the margin period in the frame period will be described in more detail later with reference to Figures 9-11 .

[0092] In an embodiment, the sensor 400 can be disposed on one side of the display apparatus 100 and sense a posture (or a physical rotation) of the display apparatus 100 (or the display panel 110) to generate posture information (or a posture sensing signal) of the display apparatus 100. In one embodiment, for example, the sensor 400 can be implemented as a posture sensor such as a gyro sensor or an acceleration sensor, and can sense an angle (or an angular rate) formed by a short side (e.g., the second short side SS2 (refer to Figure 1 )) (or a long side) of the display apparatus 100.

[0093] In an embodiment, the processor 300 can determine a screen orientation (or an output direction and a viewing mode of a screen) of the display apparatus 100 based on the posture information generated in the sensor 400. Here, the screen orientation can be a direction along which an image is output or displayed by the display apparatus 100 (or the display panel 110), a direction from an upper portion to a lower portion of the image (e.g., a character), and a direction along which the upper portion (or the lower portion) of the image is positioned. The display apparatus 100 can include at least two screen orientations. In one embodiment, for example, a first screen orientation can be in a second direction DR2 with respect to the display apparatus 100 shown in Figure 3 , and a second screen orientation can be in a first direction DR1.

[0094] In one embodiment, when the screen orientation of the display device 100 is a first screen orientation (or a second orientation DR2), the display device 100 can operate in a first viewing mode, and the processor 300 can rotate and / or scale the image data corresponding to the first screen orientation. In one embodiment, for example, the first viewing mode can be a vertical viewing mode (or a portrait viewing mode) (e.g., where the top and bottom sides of the image are the shorter sides).

[0095] In one embodiment, when the screen orientation of the display device 100 is a second screen orientation (or a first orientation DR1), the display device 100 can operate in a second viewing mode, and the processor 300 can rotate and / or scale the image data corresponding to the second screen orientation. In one embodiment, for example, the second viewing mode can be a horizontal viewing mode (or landscape mode) (e.g., where the top and bottom edges of the image are the long sides).

[0096] In one implementation, the processor 300 may generate control signals based on the screen orientation of the display device 100. In one implementation, for example, when the screen orientation of the display device 100 is a second orientation DR2 (or when the display device 100 operates in a first viewing mode (e.g., portrait viewing mode)), the processor 300 may increase the edge duration or decrease the display duration. In such an implementation, when the screen orientation of the display device 100 is a first orientation DR1 (or when the display device 100 operates in a second viewing mode (e.g., landscape viewing mode)), the processor 300 may decrease the edge duration or increase the display duration.

[0097] In an implementation, the processor 300 may generate or change control signals based on the posture information of the display device 100.

[0098] In the implementation method, as referenced Figure 3 Described, the first driver 120 for generating data signals can be configured adjacent to the long side of the display panel 110, and the second driver 130 for generating scan signals can be configured adjacent to the short side of the display panel 110. In one embodiment, the touch driver 210 can determine whether the movement speed of the touch input is greater than a reference speed. In such an embodiment, when the movement speed of the touch input is greater than the reference speed, the processor 300 can control control signals to reduce the display period in the frame cycle or increase the edge period. In such an embodiment, the update speed of the input data (or data signal) for the display panel 110 can be made faster, and screen abnormalities (e.g., screen dragging on a screen switched by scroll input) can be improved or mitigated.

[0099] Figure 4is a cross-sectional view illustrating an exemplary embodiment of a display panel included in a display apparatus. Figure 3 is a cross-sectional view illustrating an exemplary embodiment of a display panel included in a display apparatus.

[0100] Referring to Figure 3 and Figure 4 , an embodiment of the display panel 110 can include a substrate SUB, a display portion DISP (or a display layer), and a touch sensing portion TSP (or a touch sensing layer).

[0101] Referring to Figure 3 and Figure 4 , the substrate SUB can be a flexible substrate. The substrate SUB can be formed or defined by a thin film or the like including a flexible material. In one embodiment, for example, the substrate SUB can include at least one of polyether sulfone (“PES”), polyacrylate, polyetherimide (“PEI”), polyethylene naphthalate (“PEN”), polyethylene terephthalate (“PET”), polyphenylene sulfide (“PPS”), polyarylate (“PAR”), polyimide (“PI”), polycarbonate (“PC”), cellulose triacetate (“TAC”), and cellulose acetate propionate (“CAP”). However, the material of the substrate SUB is not limited thereto, and the substrate SUB can be formed using a material having flexibility within a predetermined range.

[0102] The display portion DISP can be provided or disposed on the substrate SUB. The display portion DISP can include pixels PXL. Each of the pixels PXL can include an organic light emitting diode, although the pixels PXL are not limited thereto.

[0103] The display portion DISP can further include a first sub-driver 131 and a second sub-driver 132 (i.e., a second driver 130 (see Figure 3 )). The first sub-driver 131 and the second sub-driver 132 can be disposed in the non-display area NDA. In such an embodiment, the first sub-driver 131 and the second sub-driver 132 can be disposed or formed on the substrate SUB together with the pixels PXL.

[0104] In an embodiment, the display portion DISP can include a flexible thin film encapsulation layer for encapsulating the pixels PXL. The flexible thin film encapsulation layer can be an encapsulation layer having a multi-layer film structure including at least one organic film and an inorganic film. In one embodiment, for example, the flexible thin film encapsulation layer can include a first inorganic film and a second inorganic film overlapping each other and at least one organic film interposed between the first inorganic film and the second inorganic film. In an alternative embodiment, for example, the flexible thin film encapsulation layer can be an encapsulation layer having a single-layer film structure including a complex organic material and an inorganic material.

[0105] In an embodiment, as described above, the display portion DISP is a flexible organic light emitting display panel, but there is no particular limitation on the type and / or shape of the display portion DISP.

[0106] The touch sensing portion TSP can be provided on the display portion DISP and can include a sensing electrode IE (or a plurality of sensing electrodes). The sensing electrode IE can be provided in the display area DA, but is not limited thereto. The sensing electrode IE can be used to sense an external input in a mutual capacitance method and / or a self-capacitance method. The sensing electrode IE can include a transparent conductive material such as indium tin oxide ("ITO"), indium zinc oxide ("IZO"), indium gallium zinc oxide ("IGZO"), ZnO, and indium tin zinc oxide ("ITZO"), but the sensing electrode IE is not limited thereto. In one embodiment, for example, the sensing electrode IE can include an opaque metallic material.

[0107] In an embodiment, as shown in Figure 4 , the touch sensing portion TSP can be directly formed or directly provided on the display portion DISP, but the touch sensing portion TSP is not limited thereto. In one embodiment, for example, the touch sensing portion TSP can be implemented as a separate panel (e.g., a touch panel), and the separate panel of the touch sensing portion TSP can be coupled to the display portion DISP through a separate adhesive layer (e.g., OCA, OCR, etc.).

[0108] Figure 5 is a block diagram illustrating an exemplary embodiment of a display apparatus of Figure 3 . Figure 5 Elements related to a display function (i.e., a configuration for displaying an image) of the display apparatus 100 are schematically illustrated.

[0109] Referring to Figure 3 and Figure 5 , the display apparatus 100 can include a display portion DISP, a data driver 121, a timing controller 122, and a second driver 130 (or a scan driver and a gate driver).

[0110] The display portion DISP can include a display area DA, and the display area DA can be divided into a plurality of display areas AA1 and AA2 with reference to a first folding axis FA1 (i.e., a folding axis extending in a second direction DR2). However, this is merely exemplary, and the number of areas (e.g., a first display area AA1 and a second display area AA2) defining the display area DA is not limited thereto.

[0111] The display portion DISP can include data lines DL1 to DLm (here, m is a positive integer), scan lines SL1 to SLn (here, n is a positive integer), and pixels PXL. The pixels PXL can be provided in regions divided by the data lines DL1 to DLm and the scan lines SL1 to SLn.

[0112] Each of the data lines DL1 to DLm can extend in a first direction DR1, and the data lines DL1 to DLm can be arranged along a second direction DR2. The second direction DR2 can intersect or be substantially perpendicular to the first direction DR1. Each of the scan lines SL1 to SLn can extend in the second direction DR2, and the scan lines SL1 to SLn can be arranged along the first direction DR1.

[0113] According to an embodiment, the data lines DL1 to DLm provided in the first display region AA1 and the second display region AA2 can be continuously provided between the first display region AA1 and the second display region AA2 without being broken. In one embodiment, for example, the data lines DL1 to DLm can be continuously provided between the first display region AA1 and the second display region AA2.

[0114] In an embodiment, the display portion DISP can further include light emission control lines EL1 to ELn. In an embodiment, each of the light emission control lines EL1 to ELn can extend in the second direction DR2, and the light emission control lines EL1 to ELn can be arranged along the first direction DR1.

[0115] The pixels PXL can be connected to the data lines DL1 to DLm and the scan lines SL1 to SLn (and the light emission control lines EL1 to ELn). In one embodiment, for example, a first pixel PXL1 can be provided in the first display region AA1, and can be connected to a jth data line DLj (j is a positive integer), an ith scan line SLi (i is a positive integer), and an ith light emission control line ELi. A second pixel PXL2 can be provided in the second display region AA2, and can be connected to the jth data line DLj, a kth scan line SLk (k is a positive integer), and a kth light emission control line ELk.

[0116] The first power voltage VDD and the second power voltage VSS can be supplied to the display portion DISP. The power voltages VDD and VSS can be voltages for operation of the pixels PXL, and the first power voltage VDD can have a voltage level higher than that of the second power voltage VSS. In an embodiment, an initialization power voltage Vint can be supplied to the display portion DISP. The first power voltage VDD and the second power voltage VSS and the initialization power voltage Vint can be supplied to the display portion DISP from separate power sources or power supplies.

[0117] The second driver 130 (or scan driver) can receive a scan control signal SCS from the timing controller 122, and generate scan signals in response to the scan control signal SCS. According to an embodiment, the scan control signal SCS can include a start pulse and a clock signal (or shift clock). The second driver 130 can sequentially generate the scan signals by sequentially shifting the start pulse using the clock signal, and can sequentially supply the scan signals to the scan lines SL1 to SLn.

[0118] In an embodiment, the period of the clock signal can be variable. In one embodiment, for example, when the sensing signal DS is supplied from the touch driver 210 to the processor 300 (i.e., when it is determined by the touch driver 210 that the moving speed of the touch input is greater than the reference speed), the timing controller 122 can decrease the period of the clock signal or increase the frequency. In an embodiment, the pulse width of the clock signal can be constantly maintained or fixed, but is not limited thereto. In such an embodiment, when the timing controller 122 decreases the period of the clock signal or increases the frequency, the total time in which the scan signals are supplied to the display portion DISP (e.g., the total time in which the scan signals are supplied in one frame period) can be decreased, and a complete frame image can be displayed faster.

[0119] In an embodiment, the second driver 130 can receive a light emission driving control signal from the timing controller 122, and can generate light emission control signals in response to the light emission driving control signal. The light emission driving control signal can include a light emission start pulse and a light emission clock signal (or light emission shift clock). The second driver 130 can sequentially generate the light emission control signals by sequentially shifting the light emission start pulse using the light emission clock signal, and can sequentially supply the light emission control signals to the light emission control lines EL1 to ELn. Similar to the period of the clock signal (i.e., the clock signal for the scan signal), the period of the light emission clock signal can be variable.

[0120] Data driver 121 can receive a data control signal DCS and second image data DATA2 from timing controller 122. The data control signal DCS may include a source start pulse, a source clock signal (or a source shift clock), and a source output enable signal (e.g., a data enable signal indicating the output of a valid data signal). Data driver 121 can use the data control signal DCS to generate a data signal corresponding to the second image data DATA2 and can provide the data signal to data lines DL1 to DLm.

[0121] In this implementation, the period of the source clock signal can be variable. In one implementation, for example, when the touch driver 210 determines that the movement speed of the touch input is greater than a reference speed, the timing controller 122 can decrease the period of the source clock signal or increase its frequency. In such an implementation, when the timing controller 122 decreases the period of the source clock signal or increases its frequency, the data signal is provided to the display portion (DISP) more quickly, and a complete frame image can be displayed more quickly.

[0122] The timing controller 122 can receive first image data DATA1 (or input video data) and a control signal CS from the processor 300, generate a scan control signal SCS (and a light emission drive control signal) and a data control signal DCS based on the control signal CS, and generate second image data DATA2 by converting the first image data DATA1. In one embodiment, the control signal CS may include a vertical synchronization signal VSYNC, a horizontal synchronization signal HSYNC, a clock signal, etc. In one embodiment, for example, the timing controller 122 can convert the first image data DATA1 in RGB format into the second image data DATA2 in RGBG format corresponding to the pixel arrangement in the display portion DISP.

[0123] In the implementation method, such as Figure 5 As shown, the data driver 121 and timing controller 122 may be separate from each other, but this is merely exemplary and the present disclosure is not limited thereto. In one embodiment, for example, the data driver 121 and timing controller 122 may be implemented as a single integrated circuit (e.g., the first driver 120 (reference)). Figure 3 )).

[0124] The processor 300 can generate first image data DATA1 and a control signal CS for driving the display driver (i.e., the timing controller 122, the data driver 121, the second driver 130, and / or the display part DISP). According to an embodiment, the processor 300 can be an application processor of a mobile device. However, the type of the processor 300 is not limited thereto, and the processor 300 can be another type of processor that is matched with the corresponding display device.

[0125] In an embodiment, the processor 300 can receive a sensing signal DS from the touch driver 210, and can change the control signal CS based on the sensing signal DS. In one embodiment, for example, when the processor 300 receives the sensing signal DS, the processor 300 can determine that a user is rapidly scrolling a screen of the display device 100, and change the control signal CS (e.g., a period of the horizontal synchronization signal HSYNC). In such an embodiment, the timing controller 122 can change a clock signal, a source clock signal, etc. based on the changed control signal CS, and the display driver and the display part DISP can operate based on the changed clock signal, the source clock signal, etc.

[0126] In an embodiment, the processor 300 can receive posture information of the display device 100 (or the display panel 110 (refer to Figure 3 )) from the sensor 400, and can change the control signal based on the posture information. In one embodiment, for example, when a short side of the display device 100 is parallel to a horizontal line, the processor 300 can determine an orientation of a screen of the display device 100 as a first screen orientation, and can decrease a period of the horizontal synchronization signal HSYNC according to the first screen orientation. In such an embodiment, when a long side of the display device 100 is parallel to the horizontal line, the processor 300 can determine the orientation of the screen of the display device 100 as a second screen orientation, and can increase the period of the horizontal synchronization signal HSYNC according to the second screen orientation.

[0127] Figure 6 is a circuit diagram illustrating an example of a pixel included in the display device Figure 5 of FIG. 1. In such an embodiment, Figure 5 The pixels PXL included in the display device 100 of FIG. 1 are substantially identical to each other. Therefore, for the convenience of description, hereinafter, a first pixel PXL1 will be described in detail, and any repetitive detailed description of other pixels will be omitted.

[0128] Referring to Figure 5 and Figure 6 , the first pixel PXL1 can include first to seventh transistors T1 to T7, a storage capacitor Cst, and a light emitting device LD.

[0129] Each of the first through seventh transistors T1 through T7 can be implemented as a P-type transistor, but is not limited thereto. In one embodiment, for example, at least some of the first through seventh transistors T1 through T7 can be implemented as an N-type transistor.

[0130] The first electrode of the first transistor T1 can be connected to the second node N2, or can be connected to the first power line (i.e., a power line to which the first supply voltage VDD is applied) through the fifth transistor T5. The second electrode of the first transistor T1 can be connected to the first node N1, or can be connected to the anode of the light emitting device LD through the sixth transistor T6. The gate electrode of the first transistor T1 can be connected to the third node N3. The first transistor T1 can control the amount of current flowing from the first power line to the second power line (i.e., a power line for transmitting the second supply voltage VSS) through the light emitting device LD in correspondence with the voltage of the third node N3.

[0131] The second transistor T2 (e.g., a switching transistor) can be connected between the jth data line DLj and the second node N2. The gate electrode of the second transistor T2 can be connected to the ith scan line SLi. The second transistor T2 can be turned on when a scan signal is provided to the ith scan line SLi, to electrically connect the jth data line DLj and the first electrode of the first transistor T1 to each other.

[0132] The third transistor T3 can be connected between the first node N1 and the third node N3. The gate electrode of the third transistor T3 can be connected to the ith scan line SLi. The third transistor T3 can be turned on when a scan signal is provided to the ith scan line SLi, to electrically connect the first node N1 and the third node N3 to each other. Accordingly, when the third transistor T3 is turned on, the first transistor T1 can be connected in a diode form.

[0133] The storage capacitor Cst can be connected between the first power line and the third node N3. The storage capacitor Cst can store a voltage corresponding to a data signal and a threshold voltage of the first transistor T1.

[0134] The fourth transistor T4 can be connected between the third node N3 and an initialization power line (i.e., a power line for transmitting an initialization supply voltage Vint). The gate electrode of the fourth transistor T4 can be connected to a previous scan line (i.e., the (i-1)th scan line SLi-1). The fourth transistor T4 can be turned on when a scan signal is provided to the (i-1)th scan line SLi-1, to supply the initialization supply voltage Vint to the third node N3. Here, the initialization supply voltage Vint can be set to have a voltage level lower than that of the data signal.

[0135] The fifth transistor T5 can be connected between the first power line and the second node N2. The gate electrode of the fifth transistor T5 can be connected to the i-th light emission control line ELi. The fifth transistor T5 can be turned off when a light emission control signal is supplied to the i-th light emission control line ELi, and can be turned on in other cases.

[0136] The sixth transistor T6 can be connected between the first node N1 and the light emitting device LD. The gate electrode of the sixth transistor T6 can be connected to the i-th light emission control line ELi. The sixth transistor T6 can be turned off when a light emission control signal is supplied to the i-th light emission control line ELi, and can be turned on in other cases.

[0137] The seventh transistor T7 can be connected between the initialization power line and the anode of the light emitting device LD. The gate electrode of the seventh transistor T7 can be connected to the i-th scan line SLi. The seventh transistor T7 can be turned on when a scan signal is supplied to the i-th scan line SLi to supply the initialization power voltage Vint to the anode of the light emitting device LD.

[0138] The anode of the light emitting device LD can be connected to the first transistor T1 through the sixth transistor T6, and the cathode can be connected to the second power line. The light emitting device LD can generate light having a luminance corresponding to a current supplied from the first transistor T1. The first power voltage VDD can be set to have a voltage level higher than that of the second power voltage VSS so that a current flows to the light emitting device LD.

[0139] Figure 7 is a diagram illustrating an exemplary embodiment of a display apparatus. Figure 3 Figure 7 The display apparatus 100 is schematically illustrated with respect to elements related to a touch sensing function (i.e., a configuration for sensing a touch input) of the display apparatus 100.

[0140] Referring to Figure 3 and Figure 7 , the display apparatus 100 can include a touch sensing part TSP and a touch driver 210.

[0141] The touch sensing part TSP can include a first sensing electrode IE1, a first signal line (not shown) connected to the first sensing electrode IE1, a second sensing electrode IE2, and a second signal line (not shown) connected to the second sensing electrode IE2.

[0142] ​In an embodiment, the first sensing electrodes IE1 and the second sensing electrodes IE2 can intersect each other. The first sensing electrodes IE1 can be arranged along the second direction DR2, and each of the first sensing electrodes IE1 can extend in the first direction DR1. The second sensing electrodes IE2 can be arranged along the first direction DR1, and each of the second sensing electrodes IE2 can extend in the second direction DR2. The first sensing electrodes IE1 and the second sensing electrodes IE2 can sense an external input by a mutual capacitance method and / or a self capacitance method.

[0143] The first sensing electrodes IE1 and the second sensing electrodes IE2 can include a transparent conductive material such as ITO and IZO, but are not limited thereto. In one embodiment, for example, the first sensing electrodes IE1 and the second sensing electrodes IE2 can include conductive fine lines having an opaque metal, and each of the first sensing electrodes IE1 and the second sensing electrodes IE2 can have a mesh structure (or a mesh pattern).

[0144] Each of the first sensing electrodes IE1 can include a first sensor portion SSP1 and a first connection portion CP1. Each of the second sensing electrodes IE2 can include a second sensor portion SSP2 and a second connection portion CP2.

[0145] Each of the first sensor portion SSP1 and the second sensor portion SSP2 can have a rhombic shape, but is not limited thereto. Alternatively, each of the first sensor portion SSP1 and the second sensor portion SSP2 can have another polygonal shape. In an embodiment, the first sensing electrodes IE1 and the second sensing electrodes IE2 can have a shape (e.g., a bar shape) without segmentation between the sensor portions and the connection portions.

[0146] The first connection portion CP1 connects the first sensor portion SSP1 and the first sensor portion SSP1 adjacent thereto, and the second connection portion CP2 connects the second sensor portion SSP2 and the second sensor portion SSP2 adjacent thereto.

[0147] The touch driver 210 can be connected to each of the first sensing electrodes IE1 and the second sensing electrodes IE2. The touch driver 210 can include an input sensor 211 and a sensing signal generator 212.

[0148] The input sensor 211 can generate a touch driving signal, sequentially provide the touch driving signal to the first sensing electrode IE1, and sequentially receive a sensing signal from the second sensing electrode IE2. A capacitance between the first sensing electrode IE1 and the second sensing electrode IE2 can be changed by a touch input (e.g., a touch of a finger or a pen on the touch sensing portion TSP), and the changed capacitance can be reflected on the sensing signal and output. The input sensor 211 can sense a touch input (e.g., a size and coordinates of the touch input) based on the sensing signal.

[0149] The sensing signal generator 212 can calculate a moving speed of the touch input based on the touch input sensed by the input sensor 211, and determine whether the moving speed exceeds a reference speed. When the moving speed exceeds the reference speed, the sensing signal generator 212 can generate a sensing signal DS and provide the sensing signal DS to the processor 300.

[0150] Hereinafter, the operation of the sensing signal generator 212 will be described with reference to Figure 8 The operation of the sensing signal generator 212 will be described in detail.

[0151] Figure 8 is a diagram illustrating the operation of a touch driver included in the display apparatus of Figure 7

[0152] Referring to Figure 7 and Figure 8 , the touch driver 210 (or the sensing signal generator 212) can calculate a moving speed MV of the touch input based on the continuously sensed touch inputs INPUT_T1 and INPUT_T2.

[0153] In one embodiment, for example, the touch driver 210 can calculate the moving speed MV of the touch input based on a first touch input INPUT_T1 sensed at a first time point (or a center point of the touch input sensed at the first time point) and a second touch input INPUT_T2 sensed at a second time point.

[0154] In an embodiment, the touch driver 210 can calculate a moving speed of the touch input in a first direction DR1 (i.e., a first moving speed MV_S1) and a moving speed of the touch input in a second direction DR2 (i.e., a second moving speed MV_S2). Here, as described above with reference to Figure 5 , the first direction DR1 can be parallel to a direction in which the scan lines SL1 to SLn are arranged, and the second direction DR2 can be perpendicular to the direction in which the scan lines SL1 to SLn are arranged.

[0155] ​In an embodiment, the touch driver 210 can determine whether the second moving speed MV_S2 of the touch input is greater than the first moving speed MV_S1. When the first moving speed MV_S1 is greater than the second moving speed MV_S2, the touch input can be recognized as a screen change (or screen scrolling) in the first direction DR1.

[0156] In an embodiment, the touch driver 210 can determine whether the second moving speed MV_S2 is greater than the reference speeds MVTH1 and MVTH2.

[0157] In one embodiment, for example, when the second moving speed MV_S2 is greater than the first reference speed MVTH1, the touch input can be recognized as a screen change (or screen scrolling) in the second direction DR2. In such an embodiment, the touch driver 210 can generate a sensing signal DS and provide the sensing signal DS to the processor 300. The processor 300 can increase the edge period in the frame period and decrease the display period in the frame period while maintaining the duration of the frame period (e.g., maintaining the frame frequency or the update rate of the frame image, for example, maintaining 60 Hertz (Hz)).

[0158] In one embodiment, for example, when the second moving speed MV_S2 is greater than the second reference speed MVTH2, the touch driver 210 can generate a sensing signal DS and provide the sensing signal DS to the processor 300. The processor 300 can decrease the display period in the frame period while decreasing the duration of the frame period (e.g., increasing the frame frequency or the update rate from 60 Hz to 70 Hz).

[0159] Figure 9 is a signal timing diagram illustrating an exemplary embodiment of signals in a display apparatus Figure 3

[0160] In Figure 9 , a vertical synchronization signal VSYNC, a horizontal synchronization signal HSYNC, scan signals SCAN1 to SCANn, and a data signal DATA in the display apparatus 100 are illustrated. The first scan signal SCAN1 can be provided to the first scan line SL1, the second scan signal SCAN2 can be provided to the second scan line SL2, the third scan signal SCAN3 can be provided to the third scan line SL3, and the nth scan signal SCANn can be provided to the nth scan line SLn.

[0161] In the first frame period FRAME1, the display apparatus 100 can operate in a first mode (or normal mode). In one embodiment, for example, when the moving speed of the touch input is less than the reference speed, the display apparatus 100 can operate in the first mode. ​

[0162] In the second frame period FRAME2, the display device 100 can operate in a second mode (or a variable mode). In an embodiment, for example, when the moving speed of the touch input is greater than a reference speed, the display device 100 can operate in the second mode for a certain period.

[0163] Each of the frame periods FRAME1 and FRAME2 can include a display period and a margin period. Here, the display period can be defined as a period (duration) in a frame period when an active data signal is provided to the display part DISP (refer to Figure 3 ) or a period in a frame period when the scan signals SCAN1 to SCANn and the data signal DATA are provided to the display part DISP. The margin period (or blanking period) can be a period between an ending time point of the display period and a starting time point of the next display period in a frame period. In an embodiment, for example, the first frame period FRAME1 can include a first period P1 as the display period and a second period P2 as the margin period. In such an embodiment, the second frame period FRAME2 can include a third period P3 as the display period and a fourth period P4 as the margin period.

[0164] The vertical synchronization signal VSYNC can include a pulse (e.g., a pulse having a logic low level) and can indicate the start of frame data (i.e., data corresponding to a frame period in which one frame image is displayed).

[0165] In an embodiment, the period of the vertical synchronization signal VSYNC can be regularly maintained or fixed. In such an embodiment, the size (or time width) of the second frame period FRAME2 can be equal to the size (or time width) of the first frame period FRAME1. In an embodiment, for example, each of an update rate of a frame image corresponding to the first frame period FRAME1 (or a frame image corresponding to a frame period including the first frame period FRAME1) and an update rate of a frame image corresponding to the second frame period FRAME2 can be a first frequency FREQ1 (e.g., 60 Hz). In such an embodiment, even when the moving speed of the touch input is greater than the reference speed, the update rate (frame frequency or driving frequency) can be regularly or constantly maintained or fixed.

[0166] The horizontal synchronization signal HSYNC can include a pulse (e.g., a pulse having a logic low level) and can indicate a start of a data line (i.e., one of a plurality of data lines included in the frame data). The scan signals SCAN1 to SCANn and the data signal DATA (or the data signals DATA1 to DATAn) can be synchronized with the horizontal synchronization signal HSYNC. The data signals DATA1 to DATAn can be sequentially provided through one data line.

[0167] In an embodiment, the horizontal synchronization signal HSYNC can have a second period PR2 (or a second horizontal period) in the second frame period FRAME2 that is less than a first period PR1 (or a first horizontal period) in the first frame period FRAME1. The second period PR2 can be in a range of about 80% to about 90% of the first period PR1. The first period PR1 and the second period PR2 can vary depending on an update rate and a number of scan lines. In an embodiment, for example, the first period PR1 can be about 10.68 microseconds (µs) and the second period PR2 can be about 9.25 µs.

[0168] As shown in FIG. 1A, in the first frame period FRAME1, the scan signals SCAN1 to SCANn can be sequentially provided to the scan lines based on the first period PR1. In the second frame period FRAME2, the scan signals SCAN1 to SCANn can be sequentially provided to the scan lines based on the second period PR2. In such an embodiment, in the second frame period FRAME2, the data signals DATA1 to DATAn can be provided to the data lines based on the second period PR2. In such an embodiment, in the second frame period FRAME2, a switching speed of the data signals DATA applied to one data line can be relatively increased compared to in the first frame period FRAME1. Figure 9 Thus, a total time (i.e., a third period P3 (a display period or an active period)) during which the scan signals SCAN1 to SCANn and the data signals DATA are provided in the second frame period FRAME2 can be less than a total time (i.e., a first period P1) during which the scan signals SCAN1 to SCANn and the data signals DATA are provided in the first frame period FRAME1. In an embodiment, for example, the third period P3 can be in a range of about 80% to 90% of the first period P1 (or a reference time). Thus, in the second frame period FRAME2, the data signals DATA can be updated faster and a complete frame image can be displayed faster compared to in the first frame period FRAME1.

[0169]

[0170] ​In an embodiment, the second pulse width PW2 of each of the scan signals SCAN1 to SCANn in the second frame period FRAME2 can be equal to the first pulse width PW1 of each of the scan signals SCAN1 to SCANn in the first frame period FRAME1. In such an embodiment, in the second frame period FRAME2, the data signal DATA can be stably recorded in the pixel PXL (refer to Figure 5 ) and the pixel PXL can emit light at a desired brightness.

[0171] Since the second pulse width PW2 is not changed and is constantly maintained while the second period PR2 is relatively reduced, the second interval PG2 between the pulses of the scan signals SCAN1 to SCANn in the second frame period FRAME2 can be smaller than the first interval PG1 between the pulses of the scan signals SCAN1 to SCANn in the first frame period FRAME1.

[0172] In such an embodiment, since the period (or refresh rate) of the vertical synchronization signal VSYNC is not changed, the edge period can increase as the display period decreases. That is, the fourth period P4 of the second frame period FRAME2 can be greater than the second period P2 of the first frame period FRAME1. In one embodiment, for example, the second period P2 can be about 8 times the first period PR1, and the fourth period P4 can be about 248 times the second period PR2.

[0173] In an embodiment, as described with reference to Figure 9 , when the moving speed of the touch input exceeds the reference speed (for example, when the second moving speed MV_S2 exceeds the first reference speed MVTH1 as described with reference to Figure 8 , the period of the horizontal synchronization signal HSYNC can be reduced, the display period in the frame period can be reduced, and the edge period in the frame period can be increased. In such an embodiment, since the display period in the frame period is reduced, the data signal can be updated or switched faster during one frame period, and a complete frame image can be displayed faster. Thus, screen abnormalities that are visually recognized by a user during screen switching or dragging can be effectively prevented or mitigated.

[0174] In such an embodiment, the vertical synchronization signal VSYNC and the refresh rate can be regularly maintained or fixed. Thus, an increase in power consumption of the display apparatus 100 can be minimized. In one embodiment, for example, when the refresh rate is increased by 10%, the rate of increase in power consumption of the display apparatus 100 can be within about 10% to about 15%. When only the display period is reduced while the refresh rate is fixed, the rate of increase in power consumption of the display apparatus 100 can be about 5% or less.

[0175] Figure 10 is a signal timing chart illustrating an alternative exemplary embodiment of a signal in the display device of Figure 3 Figure 10 Figure 9

[0176] Referring to Figure 9 and Figure 10 , in the second frame period FRAME2_1, the display device 100 can operate in the second mode. In one embodiment, for example, when the moving speed of the touch input is greater than the reference speed, the display device 100 can operate in the second mode for a certain period.

[0177] The period of the vertical synchronization signal VSYNC in the second frame period FRAME2_1 can be less than the period of the vertical synchronization signal VSYNC in the first frame period FRAME1. Accordingly, the size (or time width) of the second frame period FRAME2_1 can be less than the size (or time width) of the first frame period FRAME1, and the update rate (or the second frequency FREQ2, for example, 70 Hz) of the frame image corresponding to the second frame period FRAME2_1 can be greater than the update rate (or the first frequency FREQ1, for example, 60 Hz) of the frame image corresponding to the first frame period FRAME1.

[0178] In such an embodiment, as described above with reference to Figure 9 , the second period PR2 of the horizontal synchronization signal HSYNC in the second frame period FRAME2_1 can be less than the first period PR1 of the horizontal synchronization signal HSYNC in the first frame period FRAME1. Accordingly, the total time (i.e., the third period P3 (display period or active period)) during which the scan signals SCAN1 to SCANn and the data signal DATA are provided in the second frame period FRAME2_1 can be less than the total time (i.e., the first period P1) during which the scan signals SCAN1 to SCANn and the data signal DATA are provided in the first frame period FRAME1. Accordingly, in the second frame period FRAME2_1, the data signal DATA can be updated faster, and a complete frame image can be displayed faster.

[0179] ​​​In such an embodiment, the fourth period P4_1 of the second frame period FRAME2_1 can be equal to or less than the second period P2 of the first frame period FRAME1. Since the fourth period P4_1 is small, the frame rate of the frame images corresponding to the second frame period FRAME2_1 can be increased. In such an embodiment, the switching width (or moving width) between the frame images can be reduced. Accordingly, it is possible to effectively prevent or reduce the screen abnormality recognized by the user in the screen switching process, and a more natural screen switching can be achieved.

[0180] Figure 11 is a signal timing diagram illustrating another alternative exemplary embodiment of a signal in the display apparatus of Figure 3 In Figure 11 , a signal corresponding to the signal illustrated in Figure 9 is illustrated.

[0181] Referring to Figure 9 and Figure 11 , the display apparatus 100 can operate in the second mode in the second frame period FRAME2_2. In one embodiment, for example, when the moving speed of the touch input is greater than the reference speed, the display apparatus 100 can operate in the second mode for a certain period.

[0182] The period of the vertical synchronization signal VSYNC in the second frame period FRAME2_2 (frame period in the second mode) can be less than the period of the vertical synchronization signal VSYNC in the first frame period FRAME1. Accordingly, the size (or time width) of the second frame period FRAME2_2 can be less than the size (or time width) of the first frame period FRAME1, and the update rate (or third frequency FREQ3, for example, 70 Hz) of the frame images corresponding to the second frame period FRAME2_2 can be greater than the update rate (or first frequency FREQ1, for example, 60 Hz) of the frame images corresponding to the first frame period FRAME1.

[0183] The second period PR2_1 of the horizontal synchronization signal HSYNC in the second frame period FRAME2_2 can be the same as the first period PR1 of the horizontal synchronization signal HSYNC in the first frame period FRAME1. Accordingly, the total time (i.e., the third period P3_1 (display period or active period)) during which the scan signals SCAN1 to SCANn and the data signal DATA are provided in the second frame period FRAME2_2 can be equal to the total time (i.e., the first period P1) during which the scan signals SCAN1 to SCANn and the data signal DATA are provided in the first frame period FRAME1.

[0184] In such an embodiment, the second pulse width PW2_1 of each of the scan signals SCAN1 to SCANn in the second frame period FRAME2_2 can be the same as the first pulse width PW1 of each of the scan signals SCAN1 to SCANn in the first frame period FRAME1. In such an embodiment, the second interval PG2_1 between the pulses of the scan signals SCAN1 to SCANn in the second frame period FRAME2_2 can be the same as the first interval PG1 between the pulses of the scan signals SCAN1 to SCANn in the first frame period FRAME1.

[0185] In an embodiment, the fourth period P4_2 of the second frame period FRAME2_2 can be smaller than the second period P2 of the first frame period FRAME1. Since the fourth period P4_2 is smaller, the frame rate of the frame images corresponding to the second frame period FRAME2_2 can be increased. In such an embodiment, the switching width (or moving width) between the frame images can be reduced. Thus, the screen abnormality recognized visually by the user in the screen switching process can be effectively prevented or mitigated, and a more natural screen switching can be achieved.

[0186] Figure 12 is an exemplary embodiment of an image displayed on a display device of Figure 3 . Figure 12 An exemplary screen abnormality (e.g., screen drag) occurring in the switching process between the frame images when the moving speed of the touch input exceeds a reference speed is illustrated.

[0187] Referring to Figure 3 , Figure 5 , Figure 9 and Figure 1 , since the scan lines SL1 to SLn are arranged along the first direction DR1, the scan signals can be sequentially supplied to the display portion DISP.

[0188] The first image IMAGE1 indicates one frame image in the absence of a touch input.

[0189] The second image IMAGE2 indicates an image at a time point at which the Nth frame image (N is a positive integer) is switched (or updated) into the (N+1)th frame image according to a scroll input in the second direction DR2 (i.e., a touch input indicating a screen movement in the second direction DR2).

[0190] When the display device 100 operates in the sequential driving method, the frame images can be sequentially updated along the scan direction (i.e., the first direction DR1). Accordingly, the Nth frame image can be displayed in a portion of the left side of the second image IMAGE2, the (N+1)th frame image can be displayed in a portion of the right side of the second image IMAGE2, and a boundary between the maintained Nth frame image and the updated (N+1)th frame image can be discontinuously shown.

[0191] When the length of the second image IMAGE2 in the second direction DR2 is narrow, since the image (e.g., the discontinuous portion between the Nth frame image and the (N+1)th frame image) provided to the user to make a scroll input in the second direction DR2 is small, the user can not recognize the screen drag.

[0192] However, as described with reference to Figure 5 and Figure 1 , since the second driver 130 for generating the scan signal is disposed adjacent to the short side (e.g., the first short side SS1 and the second short side SS2 (refer to Figure 13 ), the length of the second image IMAGE2 in the second direction DR2 is relatively long, and thus the image (e.g., the discontinuous portion between the Nth frame image and the (N+1)th frame image) provided to the user to make a scroll input in the second direction DR2 can be increased, and the user can visually recognize the screen drag.

[0193] In such an embodiment, when a scroll input occurs in the second direction DR2, the display device 100 can update the frame image faster by increasing the margin period and decreasing the display period in a frame period. Accordingly, it can be effectively prevented or mitigated that the screen anomaly recognized visually by the user in the screen switching process.

[0194] Figure 3 is a flowchart illustrating a method of driving a display device according to an embodiment of the present disclosure.

[0195] The method of Figure 13 and Figure 13 , Figure 3 may be executed in the display device 100 of Figure 13 .

[0196] Figure 13 The method of

[0197] In the method of Figure 8 , when the touch input is sensed, the moving speed of the touch input can be calculated by the touch driver 210, and it can be determined whether the moving speed of the touch input is greater than a reference speed (S1320).

[0198] As described above with reference to Figure 13 , Figure 8 The method of an embodiment can include calculating a moving speed in a second direction DR2 perpendicular to the first direction DR1 (i.e., a second moving speed MV_S2, as described above with reference to Figure 13 ).

[0199] In such an embodiment, Figure 9 The method of an embodiment can include increasing the edge period included in a frame period in which one frame image is displayed by the processor 300 when the moving speed of the touch input is greater than the reference speed (S1330).

[0200] In such an embodiment, as described above with reference to Figure 13 , the edge period can be a period between an end time point of a display period and a start time point of a next display period.

[0201] The width of the frame period (or the update rate of the frame image) can be constantly maintained or fixed. In such an embodiment, since the edge period is increased, the display period can be reduced. That is, Figure 13 The method of an embodiment can include reducing the update time of frame data corresponding to each of the frame images.

[0202] Thereafter, Figure 13 The method of an embodiment can include displaying the frame image on the display part DISP based on the increased edge period (S1340).

[0203] In such an embodiment, Figure 13 The method of an embodiment can include reducing the edge period included in a frame period in which one frame image is displayed by the processor 300 when the moving speed of the touch input is less than the reference speed (S1350).

[0204] In one embodiment, for example, Figure 9 The method of an embodiment can include reducing the edge period when the edge period is increased or equal to a fourth period P4 compared to a second period P2, as described above with reference to Figure 13 In one alternative embodiment, for example, Figure 9 The method of an embodiment can include maintaining the width of the edge period as it is when the edge period is the same as a second period P2, as described above with reference to Figure 9 In one alternative embodiment, for example,

[0205] In an embodiment, as described above with reference to Figure 13 , Figure 14The method may include: providing a scan signal to the display portion DISP via a second driver 130 at a shorter period (e.g., a second period PR2), and providing a data signal to the display portion DISP via a first driver 120 by switching a data signal at a shorter period.

[0206] In this implementation, because the display period within the frame cycle is reduced, data signals can be updated or switched more quickly within a frame cycle, and a complete frame image can be displayed faster. Therefore, screen anomalies that are visually perceptible to the user during screen switching can be effectively prevented or mitigated.

[0207] In this implementation, since the width of the frame period or the update rate of the frame image is kept constant or fixed, the increase in power consumption of the display device can be minimized.

[0208] Figure 3 This is a flowchart illustrating a method for driving a display device according to an alternative embodiment of the present disclosure.

[0209] refer to Figure 14 and Figure 14 , Figure 3 The method can be found in Figure 14 It is executed in the display device 100.

[0210] Figure 14 The method may include: sensing touch input via touch driver 210 (S1410).

[0211] In such an implementation, Figure 8 The method may include: when a touch input is sensed, calculating the movement speed of the touch input through the touch driver 210 and determining whether the movement speed of the touch input is greater than a reference speed (S1420).

[0212] In such an implementation, as referenced Figure 14 Described, Figure 8 The method may include: calculating the movement speed in the second direction DR2, which is perpendicular to the first direction DR1 (i.e., the second movement speed MV_S2, referencing...). Figure 14 ).

[0213] In such an implementation, Figure 10 The method may include: when the movement speed of the touch input is greater than the reference speed, increasing the update rate of the frame image by the processor 300 (S1430).

[0214] In one implementation, for example, as referenced Figure 14 Described, Figure 11The method of the above-described Figure 14 The method of the above-described Figure 14 The method of the above-described

[0215] Thereafter, Figure 14 The method of the above-described

[0216] In such an embodiment, Figure 14 The method of the above-described

[0217] In one embodiment, for example, Figure 14 The method of the above-described Figure 10 The method of the above-described Figure 15 The method of the above-described

[0218] As the update rate of the frame image increases, the switching width (or moving width) between the frame images can be reduced. Accordingly, it is possible to effectively prevent or reduce the screen abnormality recognized by the user's vision during the screen switching, and to achieve a more natural screen switching.

[0219] Figure 3 is a flowchart illustrating a method of driving a display apparatus according to still another alternative embodiment of the present disclosure.

[0220] Referring to Figure 15 and Figure 15 , Figure 3 The method of the above-described Figure 15 may be executed in the display apparatus 100 of the above-described

[0221] Figure 15 The method of the above-described

[0222] Figure 15 The method of the above-described

[0223] In such an embodiment, as described above, the screen orientation can be a direction in which an image is outputted based on the display device 100, or a direction from an upper side to a lower side of the image (e.g., characters).

[0224] When the screen orientation of the display device 100 is the first screen orientation (or the second direction DR2), the display device 100 can operate in a first viewing mode (or a vertical direction viewing mode), and when the screen orientation of the display device 100 is the second screen orientation (or the first direction DR1), the display device 100 can operate in a second viewing mode (or a horizontal direction viewing mode).

[0225] Figure 15 The method of can further include determining whether the screen orientation of the display device 100 is the first screen orientation (or the second screen orientation) (S1530), and when the screen orientation is the first screen orientation, Figure 9 The method of can include increasing a margin period included in a frame period in which one frame image is displayed by the processor 300 (S1540).

[0226] The configuration for increasing the margin period can be substantially the same as the configuration for increasing the margin period described above with reference to Figure 13 and Figure 15 .

[0227] In an embodiment, when the screen orientation of the display device 100 is the first screen orientation, the display device 100 can operate in a vertical direction viewing mode, and a screen that is switched or scrolled on the second direction DR2 (i.e., a scroll screen) can be frequently displayed by the display device 100. Accordingly, when the screen orientation is the first screen orientation, Figure 15 The method of can effectively prevent or mitigate a screen anomaly that is visually recognized by a user in a screen switching process (i.e., in a process of displaying a scroll screen) by increasing the margin period.

[0228] Thereafter, Figure 15 The method of can include displaying a frame image on the display part DISP based on the increased margin period (S1550).

[0229] In such an embodiment, Figure 15 The method of can further include decreasing, by the processor 300, a margin period included in a frame period in which one frame image is displayed when the screen orientation of the display device 100 is not the first screen orientation (e.g., when the screen orientation of the display device 100 is the second screen orientation) (S1560).

[0230] In one embodiment, for example, Figure 9 The method of can include, when the screen orientation of the display device 100 is the second screen orientation (or the first direction DR1), decreasing, by the processor 300, a margin period included in a frame period in which one frame image is displayed (S1560). Figure 15When the described second period P2 is greater than or equal to the fourth period P4 compared to the edge period, the edge period is reduced. In an alternative embodiment, for example, Figure 9 The method of the described second period P2 can include: when the edge period is greater than the reference ​ The described second period P2 is the same as the edge period, the width of the edge period is maintained as is.

[0231] When the screen orientation of the display apparatus 100 is the second screen orientation, the display apparatus 100 can operate in a horizontal direction viewing mode, and a situation in which a screen is displayed scrolling in the second direction DR2 can rarely occur. Therefore, when the screen orientation is the second screen orientation, the method of FIG. 15 can not perform reducing or changing the edge period.

[0232] Therefore, in such an embodiment, it is possible to effectively prevent or mitigate a screen anomaly that is visually recognized by a user in a screen switching process, and it is possible to minimize an increase in power consumption of the display apparatus 100.

[0233] The present application should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that the disclosure will be thorough and complete, and will fully convey the inventive concept to those skilled in the art.

[0234] While the present application has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that various changes in form and details can be made therein without departing from the spirit or scope of the application as defined by the appended claims.

Claims

1. A display device comprising: a display portion including data lines, scan lines, and pixels connected to the data lines and the scan lines; a display driver that supplies a data signal to the data lines and sequentially supplies a scan signal to the scan lines; a touch sensing portion including sensing electrodes; and a touch driver that senses a touch input based on a change in capacitance between the sensing electrodes and calculates a moving speed of the touch input, wherein when the moving speed of the touch input is greater than a reference speed, a first period in a frame period is reduced, wherein a frame image is displayed in the frame period, the scan signal and the data signal are supplied in the first period, and wherein when the moving speed of the touch input is greater than the reference speed, a switching speed of the data signal is increased in the frame period.

2. The display device according to claim 1, wherein each of the scan signals is synchronized with a horizontal synchronization signal, when the moving speed of the touch input is greater than the reference speed, a period of the horizontal synchronization signal is reduced, and the horizontal synchronization signal defines a start of each of data lines included in frame data corresponding to the frame image.

3. The display device according to claim 2, further comprising: a processor that generates the horizontal synchronization signal, wherein when the moving speed of the touch input is greater than the reference speed, the touch driver supplies a sensing signal to the processor; and the processor reduces the period of the horizontal synchronization signal based on the sensing signal.

4. The display device according to claim 2, wherein an update rate of the frame image is constant.

5. The display device according to claim 4, wherein when the moving speed of the touch input is greater than the reference speed, the first period is in a range of 80 % to 90 % of a reference time, and the reference time is a period in which the scan signal and the data signal are supplied when the moving speed of the touch input is less than the reference speed.

6. The display device according to claim 1, wherein the frame period includes a second period between the first period of the frame period and a first period of an adjacent frame period, the adjacent frame period is a frame period adjacent to the frame period, and the second period is increased when the moving speed of the touch input is greater than the reference speed.

7. The display device according to claim 1, wherein the frame period includes a second period between the first period of the frame period and a first period of an adjacent frame period, the adjacent frame period is a frame period adjacent to the frame period, and the second period is constant or reduced.

8. The display device according to claim 1, wherein the display portion further includes light emission control lines, the display driver sequentially supplies a light emission control signal to the light emission control lines, and the pixels are connected to the light emission control lines and sequentially emit light based on the light emission control signal.

9. The display device according to claim 1, wherein the data lines extend in a first direction and are arranged along a second direction intersecting the first direction, the scan lines extend in the second direction and are arranged along the first direction, and the display portion is foldable on a folding axis extending in the second direction.

10. The display device according to claim 9, wherein the scan signals are sequentially supplied to the scan lines along the first direction, and the pixels sequentially emit light in response to the scan signals.

11. The display device according to claim 10, wherein the touch driver calculates the moving speed of the touch input, and the moving speed is a speed of the touch input in the second direction.

Images