Display device and driving method thereof

Abstract

The present application relates to a display apparatus and a method of driving the display apparatus. The display apparatus includes a pixel, an image converter generating second image data using first image data of an Nth frame and first image data of an (N+1)th frame, and a data driver providing a data signal corresponding to the second image data to the pixel during an (N+1)th frame period. The image converter detects a logo and a logo area using the first image data, calculates a first representative value of data corresponding to a peripheral area of the logo area among the first image data of the Nth frame and a second representative value of data corresponding to a reference area among the first image data of the (N+1)th frame, and selectively converts data for the logo among the first image data of the (N+1)th frame according to the first representative value and the second representative value to generate the second image data of the (N+1)th frame.

Description

[0001] Cross-references to related applications

[0002] This application claims priority and benefit to Korean Patent Application No. 10-2020-0134591, filed on October 16, 2020, with the Korean Intellectual Property Office, the entire contents of which are incorporated herein by reference. Technical Field

[0003] The implementation methods relate to display devices and driving methods thereof. Background Technology

[0004] In recent years, interest in information display has increased. Therefore, research and development of display devices has been ongoing.

[0005] It should be understood that the background section of this technical section is partly intended to provide useful context for understanding the technology. However, the background section may also include ideas, concepts, or knowledge that were not known or understood by a person skilled in the art prior to the relevant valid application date of the subject matter disclosed herein. Summary of the Invention

[0006] The purpose of this disclosure is to provide a display device and a driving method thereof capable of adjusting the brightness of a sign according to the brightness of the surrounding image.

[0007] The purpose of this disclosure is not limited to the foregoing, and other purposes not mentioned will be clearly understood by those skilled in the art from the following description.

[0008] The display device according to the embodiment may include: a pixel disposed in a display area; an image converter that generates second image data of the (N+1)th frame using first image data of the Nth frame and first image data of the (N+1)th frame; and a data driver that provides the pixel with a data signal corresponding to the second image data of the (N+1)th frame during the (N+1)th frame period. The image converter can detect a flag and a flag region including the flag by using the first image data of the Nth frame. The image converter can calculate a first representative value of data corresponding to the peripheral area of ​​the flag region in the first image data of the Nth frame and a second representative value of data corresponding to the reference area in the first image data of the (N+1)th frame. The image converter can selectively convert the data for the flag in the first image data of the (N+1)th frame according to the first representative value and the second representative value to generate the second image data of the (N+1)th frame.

[0009] In an implementation, the outer area of ​​the marker area can be defined as the area surrounding the marker area on its four sides.

[0010] In an implementation, the reference area can be set as at least one area of ​​the outer region that was scanned before the identified area.

[0011] In an embodiment, the display device may further include a scan driver that sequentially provides scan signals from pixels in the first row of the display area to pixels in the last row of the display area during each frame period, and the reference area may be set as the area located on top of the marker area.

[0012] In an implementation, the display device may further include a scan driver that sequentially provides scan signals from pixels in the last row of the display area to pixels in the first row of the display area during each frame period, and the reference area may be set as the area located at the bottom of the marker area.

[0013] In one implementation, the image converter may include: a flag detector that detects flags and flag regions using first image data of the Nth frame; a flag level determiner that calculates a first representative value and a second representative value based on the flag region and compares the first representative value and the second representative value to determine a flag level for the (N+1)th frame; and a data converter that, in response to the flag level, generates second image data for the (N+1)th frame by converting the grayscale values ​​of the data corresponding to the flag in the first image data of the (N+1)th frame.

[0014] In an implementation, the flag level determiner may include: a first flag level determiner that calculates a first representative value of data corresponding to a peripheral region in the first image data for the Nth frame, and determines a first flag level for the (N+1)th frame in response to the first representative value; a second flag level determiner that calculates a second representative value of data corresponding to a reference region in the first image data for the (N+1)th frame, and determines a second flag level for the (N+1)th frame in response to the second representative value; and a third flag level determiner that compares the first flag level and the second flag level to determine a third flag level for the (N+1)th frame.

[0015] In the implementation, when the first flag level is greater than the second flag level, the third flag level determiner can determine the first flag level as the third flag level, and when the second flag level is greater than or equal to the first flag level, the third flag level determiner can determine the second flag level as the third flag level.

[0016] In an implementation, the data converter may, in response to a third flag level, convert the grayscale value of the data corresponding to the flag in the first image data of the (N+1)th frame.

[0017] In the implementation, based on the first image data of the Nth frame, the first representative value can be set as the gray value of a pixel corresponding to a higher level of brightness among the gray values ​​of pixels in the outer region of the marker region, and based on the first image data of the (N+1)th frame, the second representative value can be set as the gray value of a pixel corresponding to a higher level of brightness among the gray values ​​of pixels in the reference region.

[0018] A method for driving a display device according to an embodiment may include: detecting a flag and a flag region including the flag by using first image data of a Nth frame; defining a peripheral region based on the flag region and calculating a first representative value based on data corresponding to the peripheral region in the first image data of the Nth frame; defining a reference region based on the flag region and calculating a second representative value based on data corresponding to the reference region in the first image data of a (N+1)th frame; determining a flag level of the (N+1)th frame using the first and second representative values; generating second image data of the (N+1)th frame by converting the first image data of the (N+1)th frame in response to the flag level; and generating a data signal corresponding to the second image data of the (N+1)th frame and providing the data signal to a pixel.

[0019] In an implementation, the outer area can be defined as the area surrounding the marker area on the four sides of the marker area.

[0020] In an implementation, the reference area can be set as at least one area of ​​the outer region that is scanned before the marker area.

[0021] In an implementation, the calculation of the first representative value may include setting the gray value of a pixel corresponding to a higher level of brightness among the gray values ​​of pixels set in the peripheral region based on the first image data of the Nth frame as the first representative value.

[0022] In an implementation, the calculation of the second representative value may include setting the gray value of the pixel corresponding to a higher level of brightness among the gray values ​​of the pixels set in the reference area based on the first image data of the (N+1)th frame as the second representative value.

[0023] In an implementation, determining the flag level of the (N+1)th frame may include: setting a grayscale value obtained by applying a first offset value to a first representative value as a first flag level; setting a grayscale value obtained by applying a second offset value to a second representative value as a second flag level; and determining a third flag level by comparing the first flag level and the second flag level.

[0024] In an implementation, determining the third flag level may include: determining the first flag level as the third flag level when the first flag level is greater than the second flag level; and determining the second flag level as the third flag level when the second flag level is greater than or equal to the first flag level.

[0025] In an implementation, generating the second image data of the (N+1)th frame may include: in response to a flag level, converting the grayscale value of the data corresponding to the flag in the first image data of the (N+1)th frame into a grayscale value corresponding to the flag level. Attached Figure Description

[0026] The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification. The drawings illustrate embodiments of the present disclosure and, together with the description, serve to illustrate the principles of the present disclosure, wherein:

[0027] Figure 1 This is a block diagram illustrating a display device according to an embodiment.

[0028] Figure 2 This is an equivalent circuit diagram of a pixel according to an embodiment.

[0029] Figure 3 This is an equivalent circuit diagram of a pixel according to an embodiment.

[0030] Figure 4 This is a block diagram illustrating an image converter according to an embodiment.

[0031] Figure 5 It is a diagram showing the first image, the marker area, the peripheral area, and the reference area according to the embodiment.

[0032] Figure 6 It is a diagram showing the first image, the marker area, the peripheral area, and the reference area according to the embodiment.

[0033] Figure 7 It is a graph showing the distribution of grayscale values ​​of a first image for a marker region according to an embodiment.

[0034] Figure 8 This is a diagram showing the mapping data of the marker area according to the implementation method.

[0035] Figure 9 This is a diagram showing the marker area and the outer area of ​​the second image according to the embodiment.

[0036] Figure 10 This is a diagram showing the marker area and the outer area of ​​the second image according to the embodiment. Detailed Implementation

[0037] This disclosure can be modified in various ways and can take many forms, and embodiments will be shown in the accompanying drawings and described in detail herein. In the following description, the singular form includes the plural form as well as the singular form unless the context clearly indicates that only the singular is required.

[0038] This disclosure is not limited to the embodiments disclosed below, and can be implemented in various forms. Each of the embodiments disclosed below can be implemented alone or in combination with at least one of the other embodiments.

[0039] In the accompanying drawings, for clarity, some or more elements that may not be directly related to the features of this disclosure may be omitted. Some or more elements in the drawings may be shown as exaggerated in size or scale. In all the drawings, the same or similar elements will be given by the same reference numerals and symbols, even if they may be shown in different drawings, and repeated descriptions will be omitted.

[0040] In the accompanying drawings, the dimensions, thickness, ratios, and sizes of the components may be exaggerated for ease of description and clarity.

[0041] In the specification and claims, for purposes of meaning and interpretation, the term "and / or" is intended to include any combination of the terms "and" and "or". For example, "A and / or B" can be understood to mean "A, B, or A and B". The terms "and" and "or" can be used in a combined or separated sense and can be understood as equivalent to "and / or".

[0042] In the specification and claims, for purposes of meaning and interpretation, the phrase "at least one of..." is intended to include the meaning of "at least one selected from the set of...". For example, "at least one of A and B" can be understood to mean "A, B, or A and B".

[0043] It should be understood that although the terms first, second, etc., may be used herein to describe various elements, these elements should not be limited by these terms. These terms are used only to distinguish one element from another. For example, without departing from the scope of this disclosure, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element.

[0044] For ease of description, the spatial relative terms “below,” “under,” “lower,” “above,” “upper,” etc., may be used herein to describe the relationship between one element or component and another, as shown in the accompanying drawings. It should be understood that, in addition to the orientation depicted in the drawings, the spatial relative terms are intended to include different orientations of the device in use or operation. For example, in the case where the device shown in the drawings is flipped, the device located “below” or “under” another device may be placed “above” the other device. Therefore, the illustrative term “below” can include both a lower position and an upper position. The device may also be oriented in other directions, and therefore the spatial relative terms may be interpreted differently depending on the orientation.

[0045] When used in this specification, the terms “comprises,” “comprising,” “includes,” and / or “including,” “has,” “have,” and / or “having,” and variations thereof, specify the presence of the stated features, integrals, steps, operations, elements, components, and / or combinations thereof, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or combinations thereof.

[0046] As used herein, “about” or “approximately” includes the value as well as the average of the values ​​within an acceptable range of deviations from the particular value, as determined by a person skilled in the art taking into account the measurement in question and the errors associated with the measurement of the particular quantity (i.e., limitations of the measurement system). For example, “about” may mean within one or more standard deviations, or within ±30%, ±20%, ±10%, ±5% of the value.

[0047] The embodiments can be described and illustrated in the accompanying drawings according to functional blocks, units and / or modules.

[0048] Those skilled in the art will understand that these blocks, units, and / or modules are physically implemented by electronic (or optical) circuits (such as logic circuits, discrete components, microprocessors, hardwired circuits, memory elements, wiring connections, etc.), which can be formed using semiconductor-based manufacturing techniques or other manufacturing techniques.

[0049] Where blocks, units, and / or modules are implemented by microprocessors or other similar hardware, they can be programmed and controlled by software (e.g., microcode) to perform the various functions discussed herein, and they can optionally be driven by firmware and / or software.

[0050] It is also conceivable that each block, unit, and / or module can be implemented by dedicated hardware, or can be implemented as a combination of dedicated hardware performing certain functions and processors (e.g., one or more programmed microprocessors and associated circuitry) performing other functions.

[0051] Without departing from the scope of this disclosure, each block, unit, and / or module of an implementation may be physically divided into two or more interactive and discrete blocks, units, and / or modules.

[0052] Furthermore, without departing from the scope of this disclosure, the blocks, units, and / or modules of the embodiments may be physically combined into more complex blocks, units, and / or modules.

[0053] Unless otherwise defined, all terms used herein (including technical and scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure pertains. It should also be understood that terms, such as those defined in commonly used dictionaries, shall be interpreted as having a meaning consistent with their meaning in the context of the relevant field, and shall not be interpreted in an idealized or overly formalized sense unless expressly defined herein.

[0054] Figure 1 This is a block diagram illustrating a display device 100 according to an embodiment.

[0055] Reference Figure 1 The display device 100 according to the embodiment may include a display area 110 (or a display panel including the display area) in which pixels PX can be arranged or set, and a scan driver 120, a data driver 130, a controller 140 and an image converter 150 for driving the pixels PX.

[0056] In some embodiments, the scan driver 120, data driver 130, controller 140, and / or image converter 150 may be integrated into a single driver, but this disclosure is not limited thereto. The image converter 150 may be located or arranged within the controller 140, but this disclosure is not limited thereto. For example, in some embodiments, the image converter 150 may be configured separately from the controller 140.

[0057] Display area 110 may include scan lines SL, data lines DL, and pixels PX electrically connected to scan lines SL and data lines DL. In the described embodiment, the term "connection" may refer to both physical connection and electrical connection.

[0058] The scan line SL can electrically connect the scan driver 120 and the pixel PX. Therefore, the scan signal output from the scan driver 120 can be sent to the pixel PX via the scan line SL. The timing of each data signal being input to the pixel PX (e.g., data programming cycle) can be controlled by the scan signal.

[0059] The data line DL can electrically connect the data driver 130 and the pixel PX. Therefore, the data signal output from the data driver 130 can be transmitted to the pixel PX via the data line DL. The brightness of the light emitted from each pixel PX during each frame can be controlled by the data signal.

[0060] Each pixel PX can be electrically connected to at least one scan line SL and at least one data line DL. For example, a pixel PXij arranged or set in the i-th pixel row (also called the i-th horizontal line) and the j-th pixel column (also called the j-th vertical line) in the display area 110 can be electrically connected to the i-th scan line and the j-th data line.

[0061] When a scan signal is provided from each scan line SL, pixel PX can receive a data signal through each data line DL. At least one driving power source can be provided to pixel PX (e.g., a first power source as a high-potential pixel power source and a second power source as a low-potential pixel power source).

[0062] A pixel PX can emit light with a brightness corresponding to each data signal in each transmission cycle of each frame. However, during the transmission cycle of a given frame, a pixel that receives a black data signal in a given frame can remain in a substantially non-emitting state.

[0063] In this embodiment, each of the pixels PX may be a self-emissive pixel including at least one light-emitting element, but this disclosure is not limited thereto. For example, the type, structure, and / or driving method of the pixels PX may vary depending on the embodiment.

[0064] Scan driver 120 can receive a first control signal CONT1 from controller 140 and provide scan signals to scan line SL in response to the first control signal CONT1. For example, scan driver 120 can receive the first control signal CONT1, which includes a scan start signal (e.g., a sampling pulse input to a first scan level) and a scan clock signal, and sequentially output scan signals to scan line SL in response to the first control signal CONT1.

[0065] In one implementation, the scan driver 120 may include multiple scan stages electrically connected independently to sequentially output scan signals along at least one direction or in one direction. The scan driver 120 may select pixels PX of the display area 110 while sequentially providing scan signals to scan lines SL along a certain or given direction during the scan cycle of each frame.

[0066] In one implementation, the scan driver 120 can sequentially provide scan signals to the scan lines SL in the order from the first scan line disposed or arranged in the first pixel row to the last scan line disposed in the last pixel row. Pixels PX can be scanned in a direction from the upper region to the lower region of the display area 110 (e.g., forward direction).

[0067] In one implementation, the scan driver 120 can sequentially provide scan signals to the scan lines SL in the order from the last scan line set or arranged in the last pixel row to the first scan line set or arranged in the first pixel row. Pixels PX can be scanned in a direction from the lower region of the display area 110 to the upper region (e.g., in the reverse direction).

[0068] In an implementation, the scan driver 120 can regularly change the scan direction at a period of at least one frame, or can regularly or irregularly change the scan direction according to predetermined or selected conditions or commands.

[0069] The pixel PX selected by each scan signal can receive the data signal of the corresponding frame from the data line DL.

[0070] The data driver 130 can receive a second control signal CONT2 and second image data DATA2 from the controller 140, and generate a data signal in response to the second control signal CONT2 and the second image data DATA2. For example, the data driver 130 can receive the second image data DATA2 along with the second control signal CONT2, which includes a source sampling pulse, a source sampling clock, a source output enable signal, etc., and can generate a data signal corresponding to the second image data DATA2. In an embodiment, the data signal may be generated in the form of a data voltage corresponding to the brightness displayed by the pixel PX, but this disclosure is not limited thereto.

[0071] The data driver 130 can provide each data signal to the pixel PX via the data line DL. For example, for each horizontal cycle, the data driver 130 can output a corresponding data signal to the pixel PX selected in the corresponding horizontal cycle via the data line DL. The data signal output via the data line DL can be provided to the pixel PX selected by the scan signal.

[0072] The controller 140 can receive control signal CON and first image data DATA1 from an external source (e.g., a main processor), and drive scan driver 120 and data driver 130 in response to control signal CON and first image data DATA1.

[0073] For example, controller 140 can receive control signal CON including vertical synchronization signal, horizontal synchronization signal, master clock signal, etc., and can generate a first control signal CONT1 and a second control signal CONT2 in response to control signal CON. The first control signal CONT1 can be provided to scan driver 120, and the second control signal CONT2 can be provided to data driver 130.

[0074] Furthermore, the controller 140 can convert and / or rearrange the first image data DATA1 corresponding to the image to be displayed in each frame to generate the second image data DATA2, and provide the second image data DATA2 to the data driver 130. Therefore, the data signal corresponding to the second image data DATA2 can be provided to the pixel PX, and the second image corresponding to the second image data DATA2 can be displayed in the display area 110.

[0075] In one implementation, the controller 140 may include an image converter 150 for adjusting the brightness of the marker area (e.g., the brightness of the marker).

[0076] The image converter 150 can use the first image data DATA1 for each frame (or the first image data DATA1 for multiple frames) to detect the marker region, and generate the second image data DATA2 by selectively adjusting the brightness of the marker according to the brightness of the surrounding image.

[0077] For example, when the brightness of the surrounding image is relatively low, visibility can be ensured even if the brightness of the sign is reduced. The image converter 150 can generate second image data DATA2 by converting the first image data DATA1, thereby reducing the brightness of the sign by decreasing the grayscale value of the data corresponding to the sign in the first image data DATA1.

[0078] When the brightness of the surrounding image is high, the image converter 150 can generate the second image data DATA2 by converting the first image data DATA1, thereby maintaining the brightness of the sign, or it can reduce the amount of brightness change by maintaining the grayscale value of the data corresponding to the sign in the first image data DATA1 or reducing the grayscale value to a relatively low level.

[0079] The second image data DATA2 can be provided to the data driver 130 and used to generate a data signal. Therefore, an image corresponding to the second image data DATA2 can be displayed in the display area 110.

[0080] The surrounding image can be an image displayed in a predetermined or selected range surrounding the marker area during each frame. The surrounding area can be a region adjacent to the marker area within the predetermined or selected range, and can be a region surrounding the marker area. As an example, the surrounding area can be a region surrounding the marker area on all four sides, and can be a region including a predetermined or selected number of pixels (or horizontal or vertical lines) based on the left or right and top or bottom of the marker area.

[0081] For example, the image converter 150 can selectively adjust the brightness of the sign based on the brightness of the surrounding image. Furthermore, the image converter 150 can adaptively and / or differently change the brightness of the sign based on the brightness of the surrounding image. For example, the image converter 150 can detect the brightness of the surrounding image by analyzing the grayscale values ​​of data corresponding to the peripheral region (also called peripheral region data, as data corresponding to pixels PX located or set in the peripheral region) from the first image data DATA1 of each frame, and generate the second image data DATA2 of the next frame by setting the grayscale value of the sign in the next frame to a grayscale value from the grayscale values ​​of the peripheral region data that corresponds to a predetermined higher level of brightness (e.g., a grayscale value corresponding to a 3% or 30% increase, or an approximation thereof, or a grayscale value obtained by applying a predetermined or selected offset value to the grayscale value).

[0082] For example, the image converter 150 can selectively reduce the brightness of a sign (or sign area) based on the brightness of the surrounding image, and adaptively and / or differently set the brightness of the sign in response to the brightness of the surrounding image. For example, the higher the brightness of the surrounding image, the higher the brightness of the sign. When the brightness of the surrounding image is greater than or equal to a predetermined or selected reference level, the brightness of the sign can be maintained at a brightness corresponding to the highest grayscale value (e.g., white grayscale value). On the other hand, the lower the brightness of the surrounding image, the lower the brightness of the sign. However, a lower limit brightness of the sign can be set such that the brightness of the sign is not lower than a predetermined or selected level.

[0083] In this way, by adjusting the brightness of the sign according to the brightness of the surrounding image, the visibility of the sign can be ensured, and the degradation of pixels PX located in or set in the sign area and the resulting afterimages can be prevented or reduced.

[0084] At least one of the peripheral regions can be a region scanned after the marker region. Therefore, when adjusting the brightness of the marker region by analyzing the brightness of the entire peripheral region, a delay of at least one frame may occur. For example, the analysis results of the peripheral region data in the first image data DATA1 of the Nth frame (also known as the previous frame or the immediately preceding frame) can be applied to transform the marker data in the first image data DATA1 of the (N+1)th frame (also known as the current frame).

[0085] When the brightness of the surrounding image changes rapidly, the brightness of the surrounding image and the brightness of the sign may flip. As a result, the visibility of the sign may deteriorate.

[0086] For example, if the brightness of the peripheral region in the image displayed in frame (N+1) increases rapidly compared to the image displayed in frame N, when setting the grayscale value of the marker in frame (N+1) based on the first image data DATA1 for the peripheral region of frame N, the brightness of the marker in frame (N+1) may not be set sufficiently higher than the brightness of the surrounding image, or it may be lower than the brightness of the surrounding image. Therefore, the visibility of the marker in frame (N+1) may deteriorate.

[0087] To improve the visibility of the sign, the image converter 150 according to the embodiment can set a predetermined area located or disposed around the sign area and scanned before the sign area during each frame period as a reference area, and control the brightness of the sign in the (N+1)th frame based on the brightness of the surrounding image displayed in the peripheral area in the Nth frame and the brightness of the reference image displayed in the reference area in the (N+1)th frame. According to the above embodiment, the brightness of the sign can be adjusted in real time according to the brightness of the surrounding image. Therefore, the phenomenon of the brightness of the surrounding image and the brightness of the sign can be prevented, and the visibility of the sign can be improved.

[0088] Figure 2 and Figure 3 The pixel PXij according to an embodiment is shown. For example, Figure 2 and Figure 3 The arrangement or setting is shown. Figure 1 An implementation of an arbitrary pixel PXij electrically connected to the i-th scan line SLi and the j-th data line DLj among the pixels PX in the display area 110. The pixels PX disposed in the display area 110 may have substantially similar or identical structures to each other.

[0089] According to the implementation method, Figure 2 and Figure 3 An example of a self-emissive pixel PXij that can be set or arranged in a self-emissive display device is shown. However, this disclosure is not limited thereto. Figure 2 and Figure 3 Different implementations of the light-emitting unit (EMU) are shown.

[0090] Refer to 1. Figure 2 and Figure 3 Pixel PXij may include a light-emitting unit (EMU) comprising at least one light-emitting element (LD) electrically connected between a first power supply (VDD) and a second power supply (VSS). Pixel PXij may also optionally include pixel circuitry (PXC) for controlling and / or driving the light-emitting unit (EMU).

[0091] The pixel circuit PXC can be electrically connected between the first power supply VDD and the light-emitting unit EMU. Furthermore, the pixel circuit PXC can be electrically connected to the scan line SLi and data line DLj of the corresponding pixel PXij, and controls the operation of the light-emitting unit EMU in response to the scan signals and data signals provided from the scan line SLi and data line DLj during each frame period. In addition... Figure 2 and Figure 3 In addition to the structure shown, the pixel circuit PXC can have various structures and can be selectively further electrically connected to at least one control line and / or a third power supply. For example, the pixel circuit PXC can be further electrically connected to an initialization control line, a sensing signal line, a sensing line, and / or an initialization power supply.

[0092] A pixel circuit (PXC) may include at least one transistor and a capacitor. For example, a pixel circuit (PXC) may include a first transistor T1, a second transistor T2, and a storage capacitor Cst.

[0093] The first transistor T1 may be electrically connected between the first power supply VDD and the first electrode of the light-emitting unit EMU (e.g., the anode electrode of at least one light-emitting element LD). The gate electrode of the first transistor T1 may be electrically connected to the first node N1. The first transistor T1 may control the drive current supplied to the light-emitting unit EMU in response to the voltage of the first node N1. For example, the first transistor T1 may be a drive transistor that controls the drive current of pixel PXij.

[0094] The second transistor T2 can be electrically connected between the data line DLj and the first node N1. The gate electrode of the second transistor T2 can be electrically connected to the scan line SLi. When a scan signal with a gate turn-on voltage (e.g., a high-level voltage) is provided from the scan line SLi, the second transistor T2 can be turned on to electrically connect the data line DLj and the first node N1.

[0095] In each frame cycle, the data signal corresponding to the frame can be provided to the data line DLj, and the data signal can be transmitted to the first node N1 via the first transistor T2, which is turned on during the cycle of the scan signal that provides the gate on voltage. For example, the second transistor T2 can be a switching transistor inside the pixel PXij for transmitting each data signal.

[0096] Each frame cycle can correspond to the cycle in which each frame of the image is displayed. Each frame cycle may include the scan cycle (data input cycle) used to display each frame of the image, etc.

[0097] One electrode of the storage capacitor Cst may be electrically connected to the first node N1, and another electrode may be electrically connected to the second electrode of the first transistor T1. The storage capacitor Cst may be charged with a voltage corresponding to the data signal supplied to the first node N1 during each frame period.

[0098] exist Figure 2 and Figure 3 In this embodiment, all transistors (e.g., first transistor T1 and second transistor T2) included in the pixel circuit PXC are shown as N-type transistors, but this disclosure is not limited thereto. For example, at least one of the first transistor T1 and the second transistor T2 may be changed to a P-type transistor. As an example, the pixel circuit PXC according to the embodiment may include only P-type transistors or may include a combination of P-type transistors and N-type transistors.

[0099] The structure and driving method of pixel PXij can be changed differently. For example, besides Figure 2 and Figure 3 In addition to the embodiments shown, the pixel circuit PXC may include pixel circuits having various structures and / or driving methods.

[0100] As an example, the pixel circuit PXC may also include at least one circuit element, such as a sensing transistor for sensing the characteristic information of the threshold voltage of the first transistor T1 for sensing the pixel PXij, a compensation transistor for electrically connecting the first transistor T1 in the shape of a diode during a predetermined compensation period to compensate for the threshold voltage of the first transistor T1, an initialization transistor for initializing the voltage of the first node N1 and / or the first electrode of the light-emitting element EMU, an emission control transistor for controlling the emission period of the light-emitting unit EMU, and a boost capacitor for increasing the voltage of the first node N1.

[0101] In this implementation, when pixel PXij is a pixel of a passive light-emitting display device, pixel circuit PXC can be omitted. The light-emitting unit EMU can be electrically connected or directly electrically connected to scan line SLi, data line DLj, a first power line providing a first power supply VDD, a second power line providing a second power supply VSS, and / or other signal lines or power lines.

[0102] The light-emitting unit (EMU) may include at least one light-emitting element (LD) electrically connected in the forward direction between a first power supply (VDD) and a second power supply (VSS). For example, the EMU may include... Figure 2 The embodiment shows a single light-emitting element LD electrically connected in the forward direction between a pixel circuit PXC and a second power supply VSS. One electrode of the light-emitting element LD (e.g., an anode electrode) can be electrically connected to the first power supply VDD through the pixel circuit PXC, and the other electrode of the light-emitting element LD (e.g., a cathode electrode) can be electrically connected to the second power supply VSS.

[0103] The first power supply VDD and the second power supply VSS can have different potentials, causing the light-emitting element LD to emit light. As an example, the first power supply VDD can be set as a high-potential pixel power supply, and the second power supply VSS can be set as a low-potential pixel power supply, which has a potential lower than the threshold voltage of the light-emitting element LD compared to the potential of the first power supply VDD.

[0104] When a drive current is supplied from the pixel circuit PXC, the light-emitting element LD can generate light with a brightness corresponding to the drive current. Therefore, during each frame period, each pixel PXij can emit light with a brightness corresponding to the data signal supplied to the first node N1. When a data signal corresponding to black grayscale is supplied to the first node N1 during the corresponding frame period, the pixel circuit PXC can not supply a drive current to the light-emitting element LD, and therefore, pixel PXij can be kept in a non-emitting state during the corresponding frame period.

[0105] Reference Figure 3 The light-emitting unit (EMU) may include multiple light-emitting elements (LDs) electrically connected in the forward direction between a first power supply (VDD) and a second power supply (VSS). For example, the EMU may include multiple light-emitting elements (LDs) electrically connected in series and in parallel between the pixel circuit (PXC) and the second power supply (VSS).

[0106] The connection structure of the light-emitting elements (LDs) can be varied depending on the implementation method. For example, in one implementation, the light-emitting elements (LDs) can be electrically connected only in series or in parallel with each other.

[0107] In this embodiment, each light-emitting element (LD) may be a light-emitting diode including an organic or inorganic light-emitting layer. For example, the light-emitting element (LD) may be an organic light-emitting diode, an inorganic light-emitting diode, or a quantum dot or quantum well light-emitting diode, but this disclosure is not limited thereto.

[0108] For example, in this disclosure, there are no particular limitations on the type, structure, shape, size, quantity and / or connection structure of the light-emitting elements (LD), and they can be varied depending on the implementation method.

[0109] Figure 4 This is a block diagram illustrating an image converter 150 according to an embodiment. Figure 5 and Figure 6 This is a diagram showing the first image IMG1, the marker region LGA, the peripheral region BGA, and the reference region RFA according to an embodiment. Figure 7 This is a diagram showing the distribution of grayscale values ​​of the first image IMG1 of the marker region LGA according to the embodiment. Figure 8 This is a diagram showing the mapping data LMR of the marker region LGA according to an embodiment.

[0110] According to the implementation, the first image IMG1 can be an image corresponding to the first image data DATA1 of each frame. When the first image IMG1 includes a marker LG, the marker region LGA can be a region including a predetermined or selected range of the marker LG. Furthermore, the peripheral region BGA and the reference region RFA can be predetermined or selected regions set based on the marker region LGA. For convenience, in... Figure 5 and Figure 6 In this embodiment, the marker region LGA, the peripheral region BGA, and the reference region RFA are shown as substantially rectangular areas. However, the shape and size of the marker region LGA, the peripheral region BGA, and / or the reference region RFA can vary depending on the embodiment.

[0111] The flag LG can be an image (e.g., a still image) that is repeated and / or displayed continuously in a first image IMG1 corresponding to multiple consecutive frames. For example, in the first image data DATA1 corresponding to multiple consecutive first images IMG1, the data corresponding to the flag can have a constant position and grayscale value in multiple frames.

[0112] Reference Figures 1 to 6The image converter 150 can use the first image data DATA1[N] of the Nth frame and the first image data DATA1[N+1] of the (N+1)th frame to generate the second image data DATA2[N+1] of the (N+1)th frame. For example, the image converter 150 can use the first image data DATA1[N] of the Nth frame (and / or the first image data DATA1 of the previous frame) to detect the flag LG and the flag region LGA including the flag LG, and calculate the representative value (hereinafter referred to as the first representative value) of the data corresponding to the peripheral region BGA (e.g., peripheral region data) in the first image data DATA1[N] of the Nth frame and the representative value (hereinafter referred to as the second representative value) of the data corresponding to the reference region RFA (also referred to as the reference region data as the data corresponding to the pixel PX located or set in the reference region RFA) in the first image data DATA1[N+1] of the (N+1)th frame. Furthermore, the image converter 150 can generate the second image data DATA2[N+1] of the (N+1)th frame by selectively converting the data for the flag LG (also called flag data, which is the data of the pixel PX corresponding to the display flag LG) in the first image data DATA1[N+1] of the (N+1)th frame according to the first representative value and the second representative value.

[0113] The peripheral area (BGA) can be a region defined according to the marker area (LGA), and can be a background area located directly within or set around the marker area (LGA) within a predetermined or selected range. For example, as in... Figure 5 and Figure 6 In one embodiment, the peripheral region BGA can be defined as a region surrounding the marker region LGA on its four sides. In another embodiment, the peripheral region BGA can have a shape substantially corresponding to the shape of the marker region LGA, but this disclosure is not limited thereto.

[0114] The reference region RFA can be a region defined according to the marker region LGA and the scan direction (or scan order), and can be a region scanned before the marker region LGA that is directly located or set in the region surrounding the marker region LGA. For example, the reference region RFA can be set as at least one region in the peripheral region BGA that is scanned before the marker region LGA during the corresponding frame period.

[0115] For example, as in Figure 5 In this embodiment, when sequentially scanning pixels PX in the direction from the first row to the last row of the display area 110, the reference area RFA can be set as a predetermined range located on top of the marker area LGA. In this embodiment, the reference area RFA can be set inside the peripheral area BGA, but this disclosure is not limited thereto.

[0116] When as in Figure 5 In the implementation method, when scanning pixel PX in the forward direction, Figure 1 The scan driver 120 can sequentially provide scan signals to the scan lines SL arranged or set in the first row of the display area 110 to the scan lines SL arranged or set in the last row of the display area 110 during each frame period (e.g., the scan period of each frame). Therefore, during each frame period, scan signals can be sequentially provided from the pixels PX arranged or set in the first row of the display area 110 to the pixels PX arranged or set in the last row of the display area 110.

[0117] When as in Figure 6 In this embodiment, when sequentially scanning pixels PX in the reverse direction from the last row to the first row of the display area 110, the reference area RFA can be set as a predetermined or selected area located at the bottom of the marker area LGA. In this embodiment, the reference area RFA can be set inside the peripheral area BGA, but this disclosure is not limited thereto.

[0118] When as in Figure 6 In the implementation method, when scanning pixel PX in the reverse direction, Figure 1 The scan driver 120 can sequentially provide scan signals to the scan lines SL arranged or set in the last row of the display area 110 to the scan lines SL arranged or set in the first row of the display area 110 during each frame period (e.g., the scan period of each frame). Therefore, during each frame period, scan signals can be sequentially provided from the pixels PX arranged or set in the last row of the display area 110 to the pixels PX arranged or set in the first row of the display area 110.

[0119] For example, the reference region RFA can be determined based on the position and scanning direction (or scanning order) of the marker region LGA. For instance, the reference region RFA can be set as an area with a predetermined or selected range and / or size scanned before the marker region LGA, while influencing the visibility of the marker LG by being located or positioned around the marker region LGA. Before displaying the marker LG corresponding to each frame, first image data DATA1 for the reference region RFA in the corresponding frame can be provided to the image converter 150.

[0120] Therefore, the image converter 150 can analyze the brightness of the reference region RFA based on the reference region data in the corresponding frame (e.g., the (N+1)th frame), and adjust the brightness of the flag LG in the corresponding frame according to the brightness of the reference region RFA.

[0121] As an example, such as Figure 4As shown, the image converter 150 may include a flag detector 151, a flag level determination unit or flag level determiner 152, and a data converter 153.

[0122] The flag detector 151 can receive first image data DATA1 for each frame and detect a flag LG and a flag region LGA including the flag LG based on the first image data DATA1. When the flag region LGA is detected, the peripheral region BGA and the reference region RFA can be defined based on the flag region LGA according to a predetermined or selected reference and / or range.

[0123] The marker detector 151 can use various marker detection algorithms to detect markers LG included in the first image IMG1, and define the region including the marker LG as the marker region LGA. For example, the marker detector 151 can detect markers LG that continuously maintain the same position and grayscale value, as well as the marker region LGA including the marker LG, by comparing the first image data DATA1 corresponding to multiple consecutive frames.

[0124] In an implementation, the marker detector 151 can receive first image data DATA1 for each frame and generate marker region LGA mapping data LMR by analyzing the data on the marker region LGA in the first image data DATA1 of each frame (or the accumulated data for the first image data DATA1 of multiple consecutive frames). For example, when the distribution of grayscale values ​​of the first image IMG1 of the Nth frame (e.g., the distribution of grayscale values ​​of the data corresponding to the marker region LGA in the first image data DATA1[N] of the Nth frame corresponding to the first image IMG1 (also referred to as marker region data as data corresponding to pixels PX located or set in the marker region LGA) and Figure 7 When the distributions of the embodiments shown are the same, the marker detector 151 can generate a pixel PX with a gray value equal to or greater than a predetermined or set reference gray value Vth (e.g., gray level 31) to produce a pixel PX. Figure 8 The mapping data LMR shown is illustrated here. The reference grayscale value Vth can be a value set through experimentation or other means within the spirit and scope of this disclosure. Grayscale value 31 is an example, and the reference grayscale value Vth can be varied.

[0125] As an example, the flag detector 151 can generate mapping data LMR, which identifies pixels PX1 of the pixels PX in the flag region LGA as flag LG, marking them as a first binary level, and the remaining pixels PX2 as flags of a second binary level. Figure 8The diagram illustrates the mapping data LMR when the first binary level is set to 1 and the second binary level is set to 0. For example, in the mapping data LMR, the value of pixel PX1 corresponding to the flag LG can be 1, and the value of the remaining pixel PX2 can be 0.

[0126] In an implementation, the marker detector 151 can detect the marker LG according to a marker detection algorithm using Otsu binarization. For example, the marker detector 151 can remove noise NS and detect the marker LG with higher accuracy through multi-step Otsu binarization. However, in this disclosure, the marker detection method is not limited to the marker detection algorithm using Otsu binarization, and various changes can be made according to the implementation.

[0127] The flag level determination unit or flag level determiner 152 can determine the flag level (e.g., the brightness or grayscale value of the flag LG) for the (N+1)th frame based on information about the flag region LGA detected by the flag detector 151 (e.g., the mapping data LMR of the flag region LGA) and the first image data DATA1[N] and DATA1[N+1] of the Nth and (N+1)th frames. For example, the flag level determination unit or flag level determiner 152 can calculate (or detect) a first representative value for peripheral region data in the first image data DATA1[N] of the Nth frame and a second representative value for reference region data in the first image data DATA1[N+1] of the (N+1)th frame, and determine the flag level for the (N+1)th frame by comparing the first representative value and the second representative value.

[0128] As an example, the flag level determination unit or flag level determiner 152 may include a first flag level determination unit, a second flag level determination unit, and a third flag level determination unit, or a first flag level determiner 152A, a second flag level determiner 152B, and a third flag level determiner 152C. Figure 4 In this disclosure, the flag level determination unit or flag level determiner 152 can be divided into three blocks according to its function and / or operation, but this disclosure is not limited thereto. For example, the first flag level determination unit, the second flag level determination unit and / or the third flag level determination unit or the first flag level determiner 152A, the second flag level determiner 152B and / or the third flag level determiner 152C can be integrated into one block.

[0129] The first flag level determination unit or first flag level determiner 152A can calculate a first representative value of the peripheral region data in the first image data DATA1[N] for the Nth frame, and determine the first flag level L1 for the (N+1)th frame in response to the first representative value.

[0130] For example, the first flag level determination unit or the first flag level determiner 152A may set the gray value of the pixel PX located in or set in the peripheral region BGA that corresponds to a predetermined higher level of brightness (e.g., corresponding to a 3% or 30% increase in brightness or an approximation thereof in the peripheral region BGA) as a first representative value based on the first image data DATA1[N] of the Nth frame.

[0131] The first flag level determination unit or first flag level determiner 152A can determine the grayscale value corresponding to the first representative value (or the brightness level corresponding to it) as the first flag level L1. In one embodiment, the first flag level determination unit or first flag level determiner 152A can determine the first representative value as the first flag level L1. In another embodiment, the first flag level determination unit or first flag level determiner 152A can determine the grayscale value obtained by applying a predetermined or selected first offset value to the first representative value as the first flag level L1. For example, the first flag level determination unit or first flag level determiner 152A can set the grayscale value obtained by adding the first offset value to the first representative value as the first flag level L1.

[0132] The second flag level determination unit or second flag level determiner 152B can calculate a second representative value of the reference region data in the first image data DATA1[N+1] for the (N+1)th frame, and determine a second flag level L2 for the (N+1)th frame in response to the second representative value.

[0133] For example, the second flag level determination unit or the second flag level determiner 152B can set the gray value of the pixel PX located in the reference region RFA that corresponds to a predetermined higher level of brightness (e.g., a brightness increase of 3% or 30% or an approximation thereof in the reference region RFA) as the second representative value based on the first image data DATA1[N+1] of the (N+1)th frame.

[0134] The second flag level determination unit or second flag level determiner 152B can determine the grayscale value corresponding to the second representative value (or the brightness level corresponding to it) as the second flag level L2. In an embodiment, the second flag level determination unit or second flag level determiner 152B can determine the second representative value as the second flag level L2. In an embodiment, the second flag level determination unit or second flag level determiner 152B can determine the grayscale value obtained by applying a predetermined or selected second offset value to the second representative value as the second flag level L2. For example, the second flag level determination unit or second flag level determiner 152B can set the grayscale value obtained by adding the second offset value to the second representative value as the second flag level L2.

[0135] In some embodiments, the second offset value may be the same as the first offset value, but this disclosure is not limited thereto. For example, in some embodiments, the first flag level L1 and the second flag level L2 may be determined by applying different offset values ​​to the first representative value and the second representative value.

[0136] The third flag level determination unit or third flag level determiner 152C can determine the final flag level (hereinafter referred to as the third flag level L3) for the (N+1)th frame by comparing the first flag level L1 and the second flag level L2. The third flag level L3 may be the grayscale value (or the corresponding brightness level) of the last flag LG applied to pixel PX to display the flag LG in the (N+1)th frame.

[0137] When the first flag level L1 is greater than the second flag level L2, the third flag level determination unit or the third flag level determiner 152C can determine the first flag level L1 as the third flag level L3. In other cases, for example, when the second flag level L2 is greater than or equal to the first flag level L1, the third flag level determination unit or the third flag level determiner 152C can determine the second flag level L2 as the third flag level L3. However, this disclosure is not limited thereto. For example, in an embodiment, the third flag level L3 can be determined by interpolating the first flag level L1 and the second flag level L2.

[0138] Data converter 153 can generate second image data DATA2[N+1] of the (N+1)th frame in response to a flag level (e.g., third flag level L3) ultimately determined by flag level determination unit or flag level determiner 152. For example, data converter 153 can generate second image data DATA2[N+1] of the (N+1)th frame by converting the grayscale value of the data corresponding to flag LG in the first image data DATA1[N+1] of the (N+1)th frame. For example, data converter 153 can generate second image data DATA2[N+1] of the (N+1)th frame by converting (or replacing) the grayscale value of the data corresponding to flag LG in the first image data DATA1[N+1] of the (N+1)th frame with the grayscale value of the third flag level L3.

[0139] The second image data DATA2[N+1] of the (N+1)th frame can be provided Figure 1 The data driver 130 is used to generate data signals. For example, the data driver 130 can generate a data signal corresponding to the second image data DATA2[N+1] of the (N+1)th frame, and provide the data signal to the pixel PX during the (N+1)th frame period.

[0140] According to the above embodiment, the brightness of the marker LG can be adaptively adjusted according to the brightness of the surrounding image. Therefore, the visibility of the marker LG can be ensured, and the degradation of pixels PX located in or set in the marker area LGA and the resulting image retention can be prevented or reduced.

[0141] Furthermore, according to the above embodiment, when determining the brightness of the marker LG in the current frame (e.g., the (N+1)th frame), the brightness of the marker LG can be adjusted in real time by reflecting the brightness of a predetermined or selected reference area RFA located or set around the marker region LGA in the current frame (e.g., the (N+1)th frame). Therefore, the phenomenon of brightness inversion between the surrounding image (e.g., an image displayed on the peripheral region BGA including the reference area RFA) and the marker LG can be prevented, and the visibility of the marker LG can be improved.

[0142] Figure 9 and Figure 10 Each of the second images IMG2 and IMG2' according to an embodiment is shown with a marker region LGA and a peripheral region BGA. According to an embodiment, the second images IMG2 and IMG2' may be images corresponding to the second image data DATA2 for each frame.

[0143] For example, in which according to Figures 1 to 8In one implementation, the brightness of the marker LG displayed in the (N+1)th frame is adaptively adjusted by comprehensively reflecting the first image data DATA1[N] (e.g., peripheral region data) of the Nth frame and the first image data DATA1[N+1] (e.g., reference region data) of the (N+1)th frame. Figure 9 and Figure 10 The image shown is displayed in the LGA (Landmark Area) and BGA (Border Area).

[0144] Reference Figure 9 and Figure 10 Based on the brightness of the peripheral region BGA in the previous frame (e.g., frame N) and the brightness of the reference region RFA in the current frame (e.g., frame (N+1)), the brightness of the flag LG in the current frame can be adjusted. For example, as Figure 9 As shown, when the brightness of the reference region RFA in the current frame is relatively high, the brightness of the flag LG in the current frame can also be higher than the higher-level brightness of the reference region RFA. On the other hand, as Figure 10 As shown, when the brightness of the reference region RFA in the current frame is relatively low, the brightness of the flag LG in the current frame can also be reduced.

[0145] Driver based on reference Figures 1 to 10 The method of the display device 100 described in the embodiment may include: detecting a flag LG and a flag region LGA including the flag LG using first image data DATA1[N] of at least the Nth frame; setting a peripheral region BGA according to the flag region LGA, and calculating a first representative value according to the data corresponding to the peripheral region BGA in the first image data DATA1[N] of the Nth frame; setting a reference region RFA according to the flag region LGA and the scanning direction (or scanning order), and calculating a second representative value according to the data corresponding to the reference region RFA in the first image data DATA1[N+1] of the (N+1)th frame; determining the flag level of the (N+1)th frame using the first representative value and the second representative value; generating second image data DATA2[N+1] of the (N+1)th frame by converting the first image data DATA1[N+1] of the (N+1)th frame in response to the determined flag level; and generating a data signal corresponding to the second image data DATA2[N+1] of the (N+1)th frame, and providing the data signal to the pixel PX.

[0146] According to the above embodiment, by adjusting the brightness of the marker area LGA (e.g., marker LG) based on the brightness of the surrounding image, the degradation of pixels PX located in or set in the marker area LG and the resulting image retention can be prevented or reduced. Therefore, the image quality of the display device 100 can be improved.

[0147] By adjusting the brightness of the sign LG in real time based on the brightness of the surrounding image, the phenomenon of brightness inversion between the surrounding image and the sign LG can be prevented. Therefore, the visibility of the sign LG can be improved.

[0148] The effects of the embodiments are not limited to the above content and effects, and many more effects are included in this disclosure.

[0149] Although this disclosure has been described in detail with reference to the above embodiments, it should be noted that the above embodiments are for illustrative purposes only and are not intended to limit this disclosure. Those skilled in the art will understand that various modifications are possible within the scope of this disclosure.

[0150] The scope of this disclosure is not limited to the detailed description in the specification, but should be defined by the appended claims. Furthermore, all changes or modifications to this disclosure derived from the meaning and scope of the claims, as well as their equivalents, should be construed as being included within the scope of this disclosure.

Claims

1. A display device, including: Pixels are set in the display area; An image converter generates second image data for the (N+1)th frame using first image data from the Nth frame and first image data from the (N+1)th frame; as well as The data driver provides the pixel with a data signal corresponding to the second image data of the (N+1)th frame during the (N+1)th frame period, wherein, The image converter detects a flag and a flag region including the flag by using the first image data of the Nth frame. The image converter calculates a first representative value of the data corresponding to the outer region of the marker region in the first image data of the Nth frame and a second representative value of the data corresponding to the reference region in the first image data of the (N+1)th frame, wherein the outer region is defined as the region surrounding the marker region, and the reference region is defined as at least one region of the outer region that was scanned before the marker region. The image converter transforms the data for the flag in the first image data of the (N+1)th frame based on the larger of the first representative value and the second representative value to generate the second image data of the (N+1)th frame.

2. The display device according to claim 1, wherein, The outer region of the sign area is defined as the area surrounding the sign area on its four sides.

3. The display device according to claim 1, further comprising: The scan driver sequentially provides scan signals from pixels in the first row of the display area to pixels in the last row of the display area during each frame cycle. The reference area is defined as the area located on top of the mark area.

4. The display device according to claim 1, further comprising: The scan driver sequentially provides scan signals from the pixels in the last row of the display area to the pixels in the first row of the display area during each frame cycle. The reference area is defined as the area located at the bottom of the mark area.

5. The display device according to claim 1, wherein, The image converter includes: A sign detector detects the sign and the sign region using the first image data of the Nth frame; A flag level determiner calculates a first representative value and a second representative value based on the flag region, and compares the first representative value and the second representative value to determine the flag level for the (N+1)th frame; and A data converter, in response to the flag level, generates the second image data of the (N+1)th frame by converting the grayscale values ​​of the data corresponding to the flag in the first image data of the (N+1)th frame.

6. The display device according to claim 5, wherein, The flag level determiner includes: A first flag level determiner calculates a first representative value for the data corresponding to the peripheral region in the first image data for the Nth frame, and determines a first flag level for the (N+1)th frame in response to the first representative value. A second flag level determiner calculates a second representative value for the data corresponding to the reference region in the first image data of the (N+1)th frame, and determines a second flag level for the (N+1)th frame in response to the second representative value; and A third flag level determiner compares the first flag level and the second flag level to determine a third flag level for the (N+1)th frame.

7. The display device according to claim 6, wherein, When the first flag level is greater than the second flag level, the third flag level determiner determines the first flag level as the third flag level, and When the second flag level is greater than or equal to the first flag level, the third flag level determiner determines the second flag level as the third flag level.

8. The display device according to claim 6, wherein, The data converter responds to the third flag level by converting the grayscale value of the data corresponding to the flag in the first image data of the (N+1)th frame.

9. The display device according to claim 1, wherein, Based on the first image data of the Nth frame, the first representative value is set to the grayscale value of a pixel corresponding to a higher brightness level among the grayscale values ​​of the pixels in the outer region of the marker region, and Based on the first image data of the (N+1)th frame, the second representative value is set as the gray value of a pixel corresponding to a higher level of brightness among the gray values ​​of the pixels in the reference area.

10. A method for driving a display device, including: The marker and the marker region including the marker are detected by using the first image data of the Nth frame; A peripheral region is defined based on the marked region, and a first representative value is calculated based on the data corresponding to the peripheral region in the first image data of the Nth frame; A reference region is set according to the marked region, and a second representative value is calculated based on the data corresponding to the reference region in the first image data of the (N+1)th frame, wherein the peripheral region is set as the region surrounding the marked region, and the reference region is set as at least one region of the peripheral region scanned before the marked region. The larger of the first representative value and the second representative value is used to determine the flag level of the (N+1)th frame; In response to the flag level, the second image data of the (N+1)th frame is generated by transforming the first image data of the (N+1)th frame; and Generate a data signal corresponding to the second image data of the (N+1)th frame, and provide the data signal to the pixel.

11. The method according to claim 10, wherein, The outer region is defined as the area surrounding the sign area on the four sides of the sign area.

12. The method according to claim 10, wherein, The calculation of the first representative value includes setting the gray value of the pixel corresponding to the higher level of brightness among the gray values ​​of the pixels set in the peripheral region based on the first image data of the Nth frame as the first representative value.

13. The method according to claim 10, wherein, The calculation of the second representative value includes setting the gray value of the pixel corresponding to the higher level of brightness among the gray values ​​of the pixels set in the reference area based on the first image data of the (N+1)th frame as the second representative value.

14. The method of claim 10, wherein, Determining the flag level of the (N+1)th frame includes: The grayscale value obtained by applying the first offset value to the first representative value is set as the first flag level; The grayscale value obtained by applying the second offset value to the second representative value is set as the second flag level; and The third flag level is determined by comparing the first flag level and the second flag level.

15. The method according to claim 14, wherein, Determining the third flag level includes: When the first flag level is greater than the second flag level, the first flag level is determined as the third flag level; and When the second flag level is greater than or equal to the first flag level, the second flag level is determined as the third flag level.

16. The method of claim 10, wherein, The generation of the second image data of the (N+1)th frame includes: in response to the flag level, converting the grayscale value of the data corresponding to the flag in the first image data of the (N+1)th frame into a grayscale value corresponding to the flag level.

Images