Display device and driving method of display device

Abstract

A display device and a driving method of the display device are provided. The display device includes a display panel including a display area displaying an image, the image including a first image and a second image, and a driver receiving an image signal to transmit a data signal to the display panel, the driver including a residual image compensation section transforming the image signal so that the first image is displayed shifted, the residual image compensation section including an extraction section extracting compensation area data for the image displayed in a compensation area, a calculation section calculating fixed data, and a shift section generating shifted fixed data, the compensation area including a first area displaying the first image and a second area displaying a peripheral image defined in a periphery of the first image in the second image, the fixed data being defined as data for the first image in the compensation area data.

Description

Technical Field

[0001] This invention relates to a display device and a driving method for the display device, and more specifically to a display device having improved display quality and a driving method for the display device. Background Technology

[0002] Various forms of display devices are being used to provide image information. In particular, organic light-emitting display (OLED), liquid crystal display (LCD), and plasma display devices are being used as display devices.

[0003] The display device includes a display panel for displaying images and a driver combined with the display panel to provide drive signals to the display panel. The display panel includes pixels that generate light. In the case of an organic light-emitting display device, it includes organic light-emitting diodes (OLEDs) that generate light.

[0004] Display devices apply current and voltage to pixels to display images. However, if the display device displays a feature image for an extended period, the pixels may degrade, potentially resulting in image retention or reduced image quality.

[0005] In recent years, in order to solve this problem, technologies such as moving the feature image displayed for a long time at a certain period of time or reducing the brightness are being used. Summary of the Invention

[0006] The purpose of this invention is to provide a display device that prevents pixel degradation of a displayed fixed image from causing image retention and improves the image quality around the fixed image.

[0007] An embodiment of the present invention relates to a display device comprising: a display panel including a display area for displaying an image, the image including a first image and a second image; and a driver for receiving an image signal from an external source and thereby applying a data signal to the display panel. The driver includes: a retention compensation unit that transforms the image signal such that the first image is periodically shifted for display. The retention compensation unit includes: an extraction unit that extracts compensation area data for an image displayed in the compensation area from the image signal; a calculation unit that calculates fixed data from the compensation area data; and a shifting unit that generates shifted fixed data based on the fixed data. The compensation area includes: a first area defined as an area for displaying the first image; and a second area for displaying a peripheral image of the second image defined around the first image. The fixed data may be defined as data for the first image in the compensation area data.

[0008] As an embodiment of the present invention, the image retention compensation unit may further include: a judgment unit, which generates a judgment signal based on the compensation area data to determine the method of calculating the fixed data.

[0009] In one embodiment of the present invention, the judgment signal includes a first judgment signal and a second judgment signal. When the first image includes a first sub-image identified as text and a second sub-image identified as a text background image, the judgment unit generates the first judgment signal. When the first image includes only the first sub-image, the judgment unit generates the second judgment signal.

[0010] As an embodiment of the present invention, the calculation unit may determine a method for calculating the fixed data from the compensation region data based on the first judgment signal and the second judgment signal.

[0011] In one embodiment of the present invention, the first region includes: a first sub-region included within the first region; and a second sub-region surrounding the first sub-region. The fixed data includes first fixed data and second fixed data, wherein the first fixed data is defined as data for an image displayed in the first sub-region, and the second fixed data is defined as data for an image displayed in the second sub-region. Upon receiving the first determination signal, the calculation unit can calculate the first fixed data as the fixed data. Upon receiving the second determination signal, the calculation unit can calculate both the first fixed data and the second fixed data as the fixed data.

[0012] In one embodiment of the present invention, the shifting unit receives a preset setting value from the outside, and generates the shift fixing data based on the setting value and the fixed data. The setting value may include information about the shift path for the first image.

[0013] In one embodiment of the present invention, the display panel may include a plurality of pixels, and the shifting path may include a first direction. The shifting unit generates the shifting fixed data based on the fixed data, such that the first image is shifted in the first direction. The shifting fixed data can be generated by lifting the fixed data, such that the first image displayed by n pixels arranged in the first direction is displayed on m pixels arranged in the first direction. The shifting fixed data can be generated by pulling down the lifted fixed data, such that the first image displayed by the m pixels is displayed on n pixels shifted by mn pixels along the first direction. Here, n and m can be natural numbers greater than 1, and m can be a natural number greater than n.

[0014] As an embodiment of the present invention, the shift path may further include a second direction intersecting the first direction. The shifting unit may generate the shift fixed data based on the fixed data, such that the first image is shifted in the second direction. The shift fixed data may be boosted to generate the shift fixed data, such that the first image displayed by j pixels arranged in the second direction is displayed on k pixels arranged in the second direction. The boosted fixed data may be pulled down to generate the shift fixed data, such that the first image displayed by the k pixels is displayed on j pixels shifted kj pixels along the second direction. Here, j and k can be natural numbers greater than 1, and k can be a natural number greater than j.

[0015] As an embodiment of the present invention, the image retention compensation unit may further include: a transformation unit that receives the shift-fixed data and transforms the shift-fixed data to generate image data, wherein the driver can transform the image data into a data signal.

[0016] As an embodiment of the present invention, the driver may include: a controller that receives the image signal and the control signal from the outside; a source driver that receives the image data and the control signal from the controller and sends the data signal to the display panel; and a gate driver that receives the control signal from the controller and sends a scan signal to the display panel, wherein the image retention compensation unit may be included in the controller.

[0017] An embodiment of the present invention relates to a driving method for a display device, the display device comprising: a display panel including a display area for displaying an image, the image including a first image and a second image; and a driver for receiving an image signal from an external source and thereby sending a data signal to the display panel. The driving method for the display device includes: a step of transforming the image signal to generate shift-fixed data such that the first image is periodically shifted for display. The step of generating the shift-fixed data includes: a step of extracting compensation area data for an image displayed in a compensation area from the image signal; a step of calculating fixed data from the compensation area data; and a step of generating the shift-fixed data based on the fixed data. The compensation area includes: a first area for displaying the first image; and a second area for displaying a peripheral image defined around the first image in the second image. The fixed data is defined as data for the first image in the compensation area data.

[0018] As an embodiment of the present invention, the step of generating the shifted fixed data may further include: a step of generating a judgment signal based on the compensation region data to determine the method of calculating the fixed data.

[0019] In one embodiment of the present invention, in the step of generating the judgment signal, if the first image includes a first sub-image identified as text and a second sub-image identified as a text background image, a first judgment signal can be generated. In the step of generating the judgment signal, if the first image includes only the first sub-image, a second judgment signal can be generated.

[0020] As an embodiment of the present invention, in the step of calculating the fixed data, a method for calculating the fixed data from the compensation region data can be determined based on the first judgment signal and the second judgment signal.

[0021] In one embodiment of the present invention, the first region includes: a first sub-region included within the first region; and a second sub-region surrounding the first sub-region. The fixed data includes first fixed data and second fixed data, wherein the first fixed data is defined as data for an image displayed in the first sub-region, and the second fixed data is defined as data for an image displayed in the second sub-region. In the step of calculating the fixed data, if the first determination signal is received, the first fixed data can be calculated as the fixed data; if the second determination signal is received, both the first fixed data and the second fixed data can be calculated as the fixed data.

[0022] In one embodiment of the present invention, in the step of generating the shift-fixed data, a preset setting value can be received from an external source, and the shift-fixed data can be generated based on the setting value and the fixed data. The setting value may include information about the shift path for the first image.

[0023] In one embodiment of the present invention, the display panel may include a plurality of pixels, and the shifting path may include a first direction. The step of generating the shift fixed data may include generating the shift fixed data based on the fixed data such that the first image is shifted in the first direction. The step of generating the shift fixed data such that the first image displayed by n pixels arranged in the first direction is displayed on m pixels arranged in the first direction. The step of generating the shift fixed data may include pulling down the boosted fixed data such that the first image displayed by the m pixels is displayed on n pixels shifted mn pixels along the first direction. Here, n and m can be natural numbers greater than 1, and m can be a natural number greater than n.

[0024] As an embodiment of the present invention, the shift path may further include a second direction intersecting the first direction. The step of generating the shift fixation data may further include generating the shift fixation data based on the fixation data such that the first image is shifted in the second direction. The step of generating the shift fixation data such that the first image displayed by j pixels arranged in the second direction is displayed on k pixels arranged in the second direction. The step of generating the shift fixation data such that the first image is shifted in the second direction may include pulling down the boosted fixation data such that the first image is displayed on j pixels shifted kj pixels along the second direction. Here, j and k can be natural numbers greater than 1, and k can be a natural number greater than j.

[0025] As an embodiment of the present invention, the driving method of the display device may further include the steps of receiving the shifted fixed data and transforming the shifted fixed data to generate image data. Furthermore, the driving method of the display device may further include the step of generating the data signal based on the image data.

[0026] As an embodiment of the present invention, the driver may include: a controller that receives the image signal and the control signal from the outside; a source driver that receives the image data and the control signal from the controller and sends the data signal to the display panel; and a gate driver that receives the control signal from the controller and sends a scan signal to the display panel, wherein the step of generating the shift-fixed data can be implemented by the controller.

[0027] (Invention Effects)

[0028] According to the present invention, fixed data other than the data for the surrounding area can be calculated in the compensation area data for the compensation area. Therefore, it is possible to prevent the surrounding image from being shifted during the process of shifting the fixed image to prevent the degradation of the display device. As a result, image quality degradation such as image misalignment at the boundary between the non-compensated area and the surrounding area can be prevented. Attached Figure Description

[0029] Figure 1 This is a plan view of a display device according to an embodiment of the present invention.

[0030] Figure 2 This is a block diagram of a display device according to an embodiment of the present invention.

[0031] Figure 3 This is a block diagram illustrating an image retention compensation unit according to an embodiment of the present invention.

[0032] Figure 4a It is an enlarged representation and Figure 1 An enlarged plan view of a portion of the display panel corresponding to AA'.

[0033] Figure 4b It is a magnified view of the same Figure 1 A magnified plan view of a portion of the display panel corresponding to BB'.

[0034] Figure 5a and Figure 5b It is used for explanation Figure 3 A diagram illustrating an example of the operation of the computational unit.

[0035] Figures 6a to 6c as well as Figures 7a to 7c In order to explain Figure 3 The operation of the shifting part is amplified and represented by Figure 5b A diagram of a portion of the display panel corresponding to CC'.

[0036] Figure 8 This is a sequence diagram illustrating a method for displaying a first image by shifting it according to an embodiment of the present invention.

[0037] Figure 9 This is a sequence diagram showing the method for generating the judgment signal and the method for calculating the first fixed data and the second fixed data.

[0038] Figure 10 and Figure 11 This is a sequence diagram representing a method for generating shifted fixed data based on fixed data. Detailed Implementation

[0039] In this specification, when it is mentioned that a certain component (or region, layer, part, etc.) is located on, connected to or combined with other components, it means that it can be directly configured / connected / combined with other components, or a third component can be configured therein.

[0040] The same symbols refer to the same constituent elements. In addition, the thickness, proportions, and dimensions of the constituent elements in the various figures are exaggerated for the purpose of effectively illustrating the technical content.

[0041] "And / or" includes more than one combination of all possible related components.

[0042] The terms "first," "second," etc., can be used to describe various constituent elements, but the constituent elements described should not be limited to these terms. These terms are used only to distinguish one constituent element from others. For example, without departing from the scope of this invention, a first constituent element can be named a second constituent element, and similarly, a second constituent element can be named a first constituent element. Singular expressions include plural expressions unless explicitly stated otherwise in the text.

[0043] Furthermore, terms such as "below," "on the lower side," "above," and "on the upper side" are used to explain the connection relationships between the components in the diagram. These terms are relative concepts and are explained based on the direction shown in the diagram.

[0044] Unless otherwise defined, all terms used in this specification (including technical and scientific terms) shall have the same meaning as commonly understood by those skilled in the art. Furthermore, terms defined in commonly used dictionaries shall be interpreted as having a meaning consistent with the relevant technical context, and shall not be interpreted as having an idealized or overly formal meaning unless explicitly defined in this application.

[0045] Terms such as “including” or “having” should be understood as referring to the presence of features, figures, steps, operations, constituent elements, components, or combinations thereof as recorded in the instruction manual, and do not preclude the existence or additional possibilities of one or more other features, figures, steps, operations, constituent elements, components, or combinations thereof.

[0046] Hereinafter, various embodiments of the present invention will be described with reference to the accompanying drawings.

[0047] Figure 1 This is a plan view of a display device according to an embodiment of the present invention. Figure 2 This is a block diagram of a display device according to an embodiment of the present invention.

[0048] Reference Figure 1 and Figure 2 The display device DD has a rectangular shape, with a long side extending in a first direction DR1 and a short side extending in a second direction DR2 that intersects the first direction DR1. The second direction DR2 and the first direction DR1 can be perpendicular. However, the shape of the display device DD is not limited to this; various shapes of display devices DD can be provided.

[0049] The display device DD involved in this invention can be a large display device such as a television set or a screen, or a small to medium-sized display device such as a mobile phone, tablet, car navigation system, or game console. These are merely provided as examples, and can of course be used in other electronic devices without departing from the concept of this invention.

[0050] Reference Figure 1 and Figure 2 An embodiment of the present invention relates to a display device DD comprising a display panel DP for displaying images and a driver CP for driving the display panel DP. As an example of the present invention, the driver CP may include a controller TCP, a gate driver GDB, a source driver SDB, a light-emitting driver EDB, and a voltage generator VGT.

[0051] The display panel DP includes a display area DA for displaying the image IM and a non-display area NDA adjacent to the periphery of the display area DA. The display area DA is the area that actually displays the image, while the non-display area NDA is a border area where no image is displayed. Figure 1 The diagram illustrates a non-display area NDA configured to surround a display area DA, but the invention is not limited thereto. The non-display area NDA may be configured only on at least one side of the display area DA.

[0052] An image IM can be displayed in the display area DA. The image IM can include a first image FIM and a second image NFIM. The first image FIM can be an image displayed at a fixed position for a certain period of time at a specific gray level. For example, the first image FIM can include a broadcaster's logo, subtitles, weather, time, etc. The first image FIM can also include program names, etc. Hereinafter, for ease of explanation, all images displayed at a fixed position for a certain period of time at a specific gray level will be referred to as first image FIMs. Furthermore, within the first image FIMs, images including subtitles are referred to as first fixed image FIM_a, and images including broadcaster's logos are referred to as second fixed image FIM_b. As an example of the present invention, the first fixed image FIM_a may include other types of first images besides subtitles, and the second fixed image FIM_b may include other types of first images besides broadcaster's logos. The first fixed image FIM_a and the second fixed image FIM_b will be explained with reference to... Figure 4a and Figure 4b As will be discussed later. The second image NFIM can be an image displayed in the remaining portion of the display area DA, excluding the first image FIM.

[0053] The controller TCP receives image signals RGB and external control signals CTRL from the outside. The controller TCP transforms the data format of the RGB image signals to generate image data IMD that conforms to the interface specifications with the source driver SDB. Based on the external control signal CTRL, the controller TCP generates gate control signals GCS, source control signals SCS, control signals CS, masking signals MS, and emission control signals ECS. The controller TCP provides the image data IMD, source control signals SCS, and control signals CS to the source driver SDB, the gate control signals GCS and MS to the gate driver GDB, and the emission control signals ECS to the emission driver EDB.

[0054] The driver CP may further include an image retention compensation unit (ACP). As an example of the present invention, the image retention compensation unit (ACP) may be included in the controller TCP. The image retention compensation unit (ACP) can transform the RGB image signal to generate shift-fixed data (SFD) (see reference). Figure 3 This causes the first image (FIM) to be periodically shifted for display. For a detailed explanation of the shifted fixed data SFD, please refer to [link / reference needed]. Figure 3 To be continued later.

[0055] To prevent pixel PX degradation and image retention caused by prolonged display of the first image FIM through the same pixel PX, the image retention compensation unit ACP can shift the first image FIM for display on the display panel DP. As an embodiment of the present invention, the image retention compensation unit ACP can periodically shift the first image FIM in a specific pattern for display on the display panel DP.

[0056] The source driver SDB receives the source control signal SCS and the image data IMD from the controller TCP. In response to the source control signal SCS and the control signal CS, the source driver SDB converts the image data IMD into a data signal DS, and outputs the data signal DS to the multiple data lines DL1-DLm described later. The data signal DS is an analog voltage corresponding to the grayscale value of the image data IMD.

[0057] The gate driver GDB receives the gate control signal GCS and the masking signal MS from the controller TCP. The gate driver GDB generates the gate output signal based on the gate control signal GCS. In addition, the gate driver GDB generates scan signals SS1-SSn in response to the masking signal MS, and outputs the scan signals SS1-SSn to the multiple scan lines SL1-SLn described later.

[0058] The LED driver EDB receives the LED control signal ECS from the controller TCP. The LED driver EDB can respond to the LED control signal ECS to output LED signals to the LED lines EML1 to EMLn.

[0059] The voltage generator VGT generates the voltages required for the operation of the display panel DP. As an example of the present invention, the voltage generator VGT generates a first drive voltage ELVDD, a second drive voltage ELVSS, and an initialization voltage VINT. As another example of the present invention, the voltage generator VGT can operate according to the control of the driver CP.

[0060] The display panel DP includes multiple scan lines SL1-SLn, multiple data lines DL1-DLm, multiple light-emitting lines EML1 to EMLn, and multiple pixels PX. The multiple scan lines SL1-SLn extend from the gate driver GDB along a first direction DR1 and are arranged parallel to each other along a second direction DR2 that intersects the first direction DR1. As an example of the invention, the second direction DR2 may be perpendicular to the first direction DR1. The multiple data lines DL1-DLm can be arranged parallel to each other from the source driver SDB along the first direction DR1 and extend along the second direction DR2.

[0061] Multiple pixels PX are electrically connected to three corresponding scan lines SL1 to SLn. Furthermore, each of the multiple pixels PX is electrically connected to one corresponding light-emitting line among the light-emitting lines EML1-EMLn and one corresponding data line among the data lines DL1 to DLm. For example, as... Figure 2 As shown, the first pixel PX in each pixel PX can be connected to the first scan line SL1, the second scan line SL2 and the third scan line SL3, the first light-emitting line EML1 and the first data line DL1.

[0062] Each of the multiple pixels (PX) includes an organic light-emitting diode (OLED) and a pixel circuit section for controlling the light emission of the OLED. The pixel circuit section may include multiple transistors and capacitors. Each of the multiple pixels (PX) receives a first driving voltage ELVDD, a second driving voltage ELVSS, and an initialization voltage VINT.

[0063] Figure 3 This is a block diagram illustrating an image retention compensation unit according to an embodiment of the present invention. Figure 4a It is an enlarged representation and Figure 1 A magnified plan view of a portion of the display panel corresponding to AA'. Figure 4b It is an enlarged representation and Figure 1 A magnified plan view of a portion of the display panel corresponding to BB'. Figure 5a and Figure 5b It is used for explanation Figure 3A diagram illustrating an example of the operation of the computational unit. Figures 6a to 7c In order to explain Figure 3 The diagram shows a portion of the display panel corresponding to CC' in Figure 5, magnified by the operation of the shifting part.

[0064] Reference Figure 3 The image retention compensation unit (ACP) may include an extraction unit (EXP), a judgment unit (JP), a calculation unit (FOP), a shifting unit (SHP), and a transformation unit (CVP).

[0065] Reference Figures 3 to 4b The extraction unit EXP can extract compensation region data CAD from the image signal RGB for the compensation regions CA_a and CA_b displayed in the image shifted by the afterimage compensation unit ACP. The compensation regions CA_a and CA_b may include first regions FA_a and FA_b displaying the first images FIM_a and FIM_b, and second regions FBA_a and FBA_b, where the second regions FBA_a and FBA_b are defined as displaying the second image NFIM (refer to...). Figure 1 The regions defined in the image are the surrounding images FBIM_a and FBIM_b, which are located around the first images FIM_a and FIM_b. In one embodiment, the extraction unit EXP may include an artificial intelligence program that performs machine learning to detect the compensation regions CA_a and CA_b. As an example, the extraction unit EXP may use machine learning based on a convolutional neural network model or the like to extract the compensation region data CAD for the images displayed in the compensation regions CA_a and CA_b. In addition to machine learning, the extraction unit EXP may also use an artificial intelligence program that performs deep learning to extract the compensation region data CAD for the images displayed in the compensation regions CA_a and CA_b. The extraction unit EXP may analyze the images IM displayed on the display panel DP within a preset time period to extract the compensation regions CA_a and CA_b. Furthermore, it may analyze frames of images IM that are repeated at specific time points to extract the compensation regions CA_a and CA_b.

[0066] exist Figure 4a The image shows the first compensation region CA_a extracted by the extraction unit EXP. Hereinafter, for ease of explanation, the region displaying the first fixed image FIM_a will be defined as the first fixed region FA_a, and the second image NFIM (refer to...) will be... Figure 1The image surrounding the first fixed image FIM_a is defined as the first peripheral image FBIM_a. Furthermore, the area displaying the first peripheral image FBIM_a is defined as the first peripheral region FBA_a. As an example of the present invention, the first compensation region CA_a may include the first fixed region FA_a displaying the first fixed image FIM_a and the first peripheral region FBA_a displaying the first peripheral image FBIM_a. The first fixed image FIM_a may include a first sub-image IM1_a identified as text and a second sub-image IM2_a identified as a background image of the aforementioned text. As an example of the present invention, when the first fixed image FIM_a is a subtitle, the first sub-image IM1_a may be the text included in the subtitle, and the second sub-image IM2_a may be the background portion surrounding the first sub-image IM1_a.

[0067] As an example of the present invention, the first peripheral region FBA_a is a region included in the area where the second image NFIM is displayed. A portion of the second image NFIM can be displayed in the first peripheral region FBA_a. As an example of the present invention, a portion of the text "m" and the text "b" included in the second image NFIM can be displayed in the first peripheral region FBA_a.

[0068] exist Figure 4b The image shows the second compensation region CA_b extracted by the extraction unit EXP. Hereinafter, for ease of explanation, the region displaying the second fixed image FIM_b will be defined as the second fixed region FA_b, and the second image NFIM (refer to...) will be... Figure 1 The image surrounding the second fixed image FIM_b is defined as the second peripheral image FBIM_b. Furthermore, the area displaying the second peripheral image FBIM_b is defined as the second peripheral region FBA_b. As an example of the present invention, the second compensation region CA_b may include the second fixed region FA_b displaying the second fixed image FIM_b and the second peripheral region FBA_b displaying the second peripheral image FBIM_b. The second fixed image FIM_b may include a first sub-image IM1_b that is identified as text. As an example of the present invention, when the second fixed image FIM_b is identified as a broadcasting company logo that only includes text, the first sub-image IM1_b and the second fixed image FIM_b may be the same. However, as an example of the present invention, when the broadcasting company logo or the like includes text and a text background image, the second fixed image FIM_b may include a first sub-image corresponding to the text and a second sub-image corresponding to the text background image.

[0069] As an example of the present invention, the second peripheral region FBA_b is a region included in the area where the second image NFIM is displayed. A portion of the second image NFIM can be displayed in the second peripheral region FBA_b.

[0070] The judgment unit JP can receive the compensation area data CAD from the extraction unit EXP. The judgment unit JP can generate judgment signals JD1 and JD2 based on the compensation area data CAD to determine how to calculate the first fixed data FD1 and the second fixed data FD2.

[0071] When the first image FIM includes a first sub-image identified as text and a second sub-image identified as a text background image, the determination unit JP generates a first determination signal JD1 based on the compensation region data CAD. When the first image FIM only includes the first sub-image identified as text, the determination unit JP generates a second determination signal JD2 based on the compensation region data CAD.

[0072] Reference Figure 3 and Figure 4a The first fixed image FIM_a includes a first sub-image IM1_a as the text portion included in the subtitle and a second sub-image IM2_a as the text background image related to the aforementioned text portion. Since the first fixed image FIM_a included in the first compensation region CA_a includes the first sub-image IM1_a and the second sub-image IM2_a, the determination unit JP generates a first determination signal JD1.

[0073] Reference Figure 3 and Figure 4b The second fixed image FIM_b includes only the first sub-image IM1_b, which is displayed as "MBC" as the text portion. Since the second fixed image FIM_b, which is included in the second compensation region CA_b, includes only the first sub-image IM1_b, the judgment unit JP generates a second judgment signal JD2.

[0074] As an example of the present invention, when the first image FIM includes a first fixed image FIM_a and a second fixed image FIM_b, the determination unit JP can generate a first determination signal JD1 and a second determination signal JD2.

[0075] Reference Figure 3 and Figure 4a The calculation unit FOP can calculate fixed data based on the compensation area data CAD. As an example of the present invention, the fixed data can be defined as the compensation area data CAD for the first image FIM (refer to...). Figure 1The data of the first fixed image FIM_a is calculated by the calculation unit FOP. As an example of the present invention, when the fixed data is the data of the compensation area data CAD for the first fixed image FIM_a, the image shifted by the afterimage compensation unit ACP can include only the first fixed image FIM_a. Therefore, when the afterimage compensation unit ACP shifts not only the first fixed image FIM_a but also the first peripheral image FBIM_a, it is possible to prevent the user from recognizing the part of the characters "m" and "b" included in the second image NFIM displayed in the first peripheral area FBA_a and the remaining part of the characters "m" and "b" included in the second image NFIM not displayed in the first peripheral area FBA_a in an alternating manner.

[0076] The calculation unit FOP can receive a first judgment signal JD1 or a second judgment signal JD2 from the judgment unit JP. Based on the first judgment signal JD1 or the second judgment signal JD2, the calculation unit FOP can determine the method for calculating fixed data from the compensation area data CAD.

[0077] Reference Figure 3 , Figure 4a and Figure 5a As an example of the present invention, the first fixed region FA_a may include a first sub-region SAR1 and a second sub-region SAR2 surrounding the first sub-region SAR1. The fixed data includes first fixed data FD1 and second fixed data FD2, whereby the first fixed data FD1 is defined as data for the image displayed in the first sub-region SAR1, and the second fixed data FD2 is defined as data for the image displayed in the second sub-region SAR2.

[0078] When the first fixed image FIM_a includes a first sub-image IM1_a and a second sub-image IM2_a, the calculation unit FOP receives a first judgment signal JD1 from the judgment unit JP. Upon receiving the first judgment signal JD1, the calculation unit FOP can calculate the first fixed data FD1 as fixed data.

[0079] When the calculation unit FOP calculates the first fixed data FD1 as fixed data, it can prevent the calculation of fixed data including data for the first fixed image FIM_a and the first surrounding image FBIM_a due to calculation errors, thereby preventing a portion of the second image NFIM from being shifted by the image retention compensation unit ACP. As an example of the present invention, the calculation unit FOP can receive control signals from the outside for setting the first sub-region SAR1 and the second sub-region SAR2. The calculation unit FOP can set the first sub-region SAR1 defined by n pixels PX inward from each side of the first fixed region FA_a and the second sub-region SAR2 surrounding the first sub-region SAR1 based on the control signals. At this time, n can be 2-3. However, the method for calculating the first sub-region SAR1 is not limited to this. The calculation unit FOP can also calculate the first sub-region SAR1 by comparing it with the area of ​​the first fixed region FA_a to make it have a certain ratio of area.

[0080] Reference Figure 4b and Figure 5b When the second fixed image FIM_b only includes the first sub-image IM1_b, the calculation unit FOP receives the second judgment signal JD2 from the judgment unit JP. Upon receiving the second judgment signal JD2, the calculation unit FOP can calculate the first fixed data FD1 and the second fixed data FD2 as fixed data.

[0081] The computation unit FOP can segment the second compensation region CA_b into a second fixed region FA_b displaying the second fixed image FIM_b and a second peripheral region FBA_b displaying the second peripheral image FBIM_b, and calculate the second fixed data FD2 to include data for the second fixed image FIM_b. At this time, the computation unit FOP can segment the second compensation region CA_b through binarization. As an example of the present invention, the Otsu method can be used to segment the second compensation region CA_b.

[0082] The shifting unit SHP receives fixed data from the computing unit FOP. Based on the image included in the first image FIM, the fixed data can be at least one of first fixed data FD1 and second fixed data FD2.

[0083] The shifting unit SHP generates shift fixed data SFD based on fixed data. As an example of the present invention, the shifting unit SHP can receive a preset setting value SV from an external source. The aforementioned setting value SV may include information about the shift path of the first image FIM displayed on the display panel DP. The shifting unit SHP determines the shift path of the first image FIM based on the setting value SV and generates the shift fixed data SFD based on the fixed data.

[0084] For ease of explanation, the following describes a scenario where the first image FIM includes the second fixed image FIM_b, and the shifting unit SHP receives the first fixed data FD1 and the second fixed data FD2 from the calculation unit FOP. Furthermore, a method will be described in which the shifting unit SHP generates shifted fixed data SFD by shifting the image displayed in the first reference regions RA1_a, RA1_b, and RA1_c, which are part of the third fixed image FIM_c (which is also part of the second fixed image FIM_b).

[0085] Reference Figure 3 and Figures 6a to 6c The setting value SV applied to the shifting unit SHP includes information about the path, which is the path by which the third fixed image FIM_c, corresponding to the text "C" which is part of the second fixed image FIM_b, is shifted in the first direction DR1. The shifting unit SHP can generate shift fixing data SFD based on the setting value SV, according to the first fixing data FD1 and the second fixing data FD2, causing the third fixed image FIM_c to shift in the first direction DR1.

[0086] For ease of explanation, hereafter, any region within the area displaying the third fixed image FIM_c will be defined as a first reference region, and the number of pixels PX arranged along the first direction DR1 in each pixel PX included in the first reference region will be defined as n. The third fixed image FIM_c may include multiple first reference regions. When the images displayed in each of the first reference regions are shifted along the first direction DR1, the entire third fixed image FIM_c can be shifted along the first direction DR1.

[0087] Reference Figure 6a The first reference region before the third fixed image FIM_c is shifted by the shifting unit SHP is defined as the first sub-reference region RA1_a. The first sub-reference region RA1_a includes one pixel PX in the first direction DR1. (Refer to...) Figure 6bThe shifting unit SHP, after raising the first fixed data FD1 and the second fixed data FD2 to shift the third fixed image FIM_c, defines the first reference region as the second sub-reference region RA1_b. In the second sub-reference region RA1_b, seven pixels PX are arranged in the first direction DR1. The shifting unit SHP can raise the first fixed data FD1 and the second fixed data FD2 by a first value MM1 (refer to...) based on a set value SV. Figure 6a This causes the image displayed in the third fixed image FIM_c on the first sub-reference area RA1_a to be displayed on the second sub-reference area RA1_b.

[0088] Reference Figure 6c The shifting unit SHP defines the first reference region after pulling down the first fixed data FD1 and the second fixed data FD2, which are raised to shift the third fixed image FIM_c, as the third sub-reference region RA1_c. Compared to the first sub-reference region RA1_a, the third sub-reference region RA1_c is shifted by six pixels PX in the first direction DR1, thus including one pixel PX in the first direction DR1. The shifting unit SHP can, based on the set value SV, pull down the aforementioned raised first fixed data FD1 and raised second fixed data FD2 by a second value MM2 (refer to...). Figure 6b This causes the image in the third fixed image FIM_c that was displayed on the second sub-reference region RA1_b to be displayed on the third sub-reference region RA1_c. The shifting unit SHP shifts the third fixed image FIM_c, which is part of the second fixed image FIM_b displayed in the first sub-reference region RA1_a, to be displayed in the third sub-reference region RA1_c by lifting the first fixed data FD1 and the second fixed data FD2.

[0089] exist Figures 6a to 6c The illustration shows a scenario where the image displayed by one pixel PX arranged along the first direction DR1 in the third fixed image FIM_c is shifted by six pixels PX along the first direction DR1 and then displayed; however, the present invention is not limited to this. The shifting unit SHP can boost the first fixed data FD1 and the second fixed data FD2, such that the image displayed by n pixels PX arranged along the first direction DR1 in the third fixed image FIM_c is displayed on m pixels PX arranged along the first direction DR1. Furthermore, the boosted first fixed data FD1 and the boosted second fixed data FD2 can be pulled down to generate shifted fixed data SFD, such that the image displayed by m pixels PX is shifted by mn pixels PX along the first direction DR1 and then displayed on n pixels PX. In this case, n and m are natural numbers greater than 1, and m is a natural number greater than n.

[0090] Reference Figures 7a to 7c The setting value SV applied to the shifting unit SHP may also include information about the path, which is the path by which the fourth fixed image FIM_d, corresponding to the character "C" which is part of the second fixed image FIM_b, is shifted in the second direction DR2. The shifting unit SHP may generate shifting fixed data SFD based on the setting value SV, according to the first fixed data FD1 and the second fixed data FD2, causing the fourth fixed image FIM_d to shift in the second direction DR2.

[0091] For ease of explanation, any region within the area displaying the fourth fixed image FIM_d will be defined as a second reference region. The fourth fixed image FIM_d may include multiple second reference regions. When the images displayed in each of the second reference regions are shifted in the second direction DR2, the fourth fixed image FIM_d as a whole may be shifted in the second direction DR2.

[0092] Reference Figure 7a The second reference region before the fourth fixed image FIM_d is shifted by the shifting part SHP is defined as the fourth sub-reference region RA2_a. Three pixels PX are arranged in the fourth sub-reference region RA2_a along the second direction DR2.

[0093] Reference Figure 7b The shifting unit SHP defines the second reference region, after boosting the first fixed data FD1 and the second fixed data FD2 to shift the fourth fixed image FIM_d, as the fifth sub-reference region RA2_b. Twenty-four pixels PX are arranged along the second direction DR2 in the fifth sub-reference region RA2_b. The shifting unit SHP can boost the first fixed data FD1 and the second fixed data FD2 by a third value MM3 (see reference SV). Figure 7a This causes the image displayed in the fourth fixed image FIM_d on the fourth sub-reference region RA2_a to be displayed on the fifth sub-reference region RA2_b. (Refer to...) Figure 7c The shifting unit SHP pulls down the second reference region after the first fixed data FD1 and the second fixed data FD2, which are raised to shift the fourth fixed image FIM_d, and defines it as the sixth sub-reference region RA2_c. Compared to the fourth sub-reference region RA2_a, the sixth sub-reference region RA2_c is shifted by twenty-one pixels PX in the second direction DR2, including three pixels PX in the second direction DR2. The shifting unit SHP can pull down the aforementioned raised first fixed data FD1 and raised second fixed data FD2 based on the set value SV, using a fourth value MM4 (refer to...). Figure 7b This causes the image displayed in the fourth fixed image FIM_d on the fifth sub-reference region RA2_b to be displayed on the sixth sub-reference region RA2_c.

[0094] The shifting unit SHP shifts the fourth fixed image FIM_d, which is part of the second fixed image FIM_b displayed in the fourth sub-reference region RA2_a, to be displayed in the sixth sub-reference region RA2_c by lifting the first fixed data FD1 and the second fixed data FD2.

[0095] exist Figures 7a to 7c The illustration shows a scenario where the image displayed by three pixels PX arranged in the second direction DR2 of the fourth fixed image FIM_d is shifted by twenty-one pixels PX in the second direction DR2 and then displayed. However, the present invention is not limited to this. The shifting unit SHP can lift the first fixed data FD1 and the second fixed data FD2, so that the image displayed by j pixels PX arranged in the second direction DR2 of the fourth fixed image FIM_d is displayed on k pixels PX arranged in the second direction DR2. Furthermore, the lifted first fixed data FD1 and the lifted second fixed data FD2 can be pulled down to generate shifted fixed data SFD, so that the image displayed by k pixels PX is shifted by kj pixels PX in the second direction DR2 and then displayed on j pixels PX. In this case, j and k are natural numbers greater than 1, and k is a natural number greater than j.

[0096] The conversion unit CVP can receive fixed-shift data SFD from the shift unit SHP. The conversion unit CVP can transform the data format of the fixed-shift data SFD to generate image data IMD, making the fixed-shift data SFD conform to the interface specification with the source driver unit SDB. The driver CP can generate a data signal DS based on the image data IMD. Specifically, the source driver SDB included in the driver CP can transform the image data IMD into the data signal DS in response to the source control signal SCS and the control signal CS.

[0097] Figure 8 This is a sequence diagram illustrating a method for displaying a first image by shifting it according to an embodiment of the present invention.

[0098] Reference Figures 1 to 3 as well as Figure 8In a driving method for a display device DD including a display panel DP and a driver CP, the display panel DP includes a display area DA that displays an image IM containing a first image FIM and a second image NFIM, and the driver CP receives an image signal RGB from the outside to apply a data signal DS to the display panel DP. The driving method includes: step S100, generating shift-fixed data SFD based on the image signal RGB, such that the first image FIM is periodically shifted and displayed; step S200, receiving the shift-fixed data SFD, transforming the shift-fixed data SFD to generate image data IMD; and step S300, generating the data signal DS based on the image data IMD.

[0099] In order to generate the shift-fixed data SFD, the image retention compensation unit ACP extracts the compensation region data CAD for the compensation region from the RGB image signal via the extraction unit EXP (S101). Furthermore, the judgment unit JP generates judgment signals JD1 and JD2 based on the compensation region data CAD, determining how to calculate the first fixed data FD1 and the second fixed data FD2 (S102). Based on the judgment signals JD1 and JD2, the image retention compensation unit ACP calculates the first fixed data FD1 and the second fixed data FD2 from the compensation region data CAD via the calculation unit FOP (S103). The shift unit SHP generates the shift-fixed data SFD based on the first fixed data FD1 and the second fixed data FD2 (S104). Then, the image retention compensation unit ACP receives the shift-fixed data SFD via the transformation unit CVP and transforms the shift-fixed data SFD to generate image data IMD (S200). Furthermore, the image retention compensation unit ACP generates a data signal DS based on the image data IMD via the driver CP (S300). Specifically, the image data IMD can be transformed into the data signal DS by the source driver SDB included in the driver CP in response to the source control signal SCS and the control signal CS.

[0100] Figure 9 This is a sequence diagram representing the method for generating the judgment signal and the method for calculating the first fixed data and the second fixed data.

[0101] Reference Figure 3 and Figure 9 The judgment unit JP judges the first image FIM (reference). Figure 1 The determination signal (JD1) is determined by whether the image includes only the image identified as text or an image that includes both the image identified as text and the background image identified as text, thereby generating a first determination signal JD1 or a second determination signal JD2. As an example of the present invention, the first image FIM includes a first fixed image FIM_a and a second fixed image FIM_b.

[0102] As an example of the present invention, refer to Figure 4aWhen the first fixed image FIM_a includes a first sub-image IM1_a that is identified as text and a second sub-image IM2_a that is identified as a text background image, the judgment unit JP generates a first judgment signal JD1.

[0103] Reference Figure 4b When the second fixed image FIM_b only includes the first sub-image IM1_b that is recognized as text, the judgment unit JP generates a second judgment signal JD2 (S102).

[0104] Reference Figure 5a Upon receiving the first judgment signal JD1, the calculation unit FOP calculates the first fixed data FD1 from the compensation area data CAD as fixed data (S103a). Upon receiving the second judgment signal JD2, the calculation unit FOP calculates the first fixed data FD1 and the second fixed data FD2 from the compensation area data CAD as fixed data (S103b).

[0105] Figure 10 and Figure 11 This is a sequence diagram representing a method for generating shifted fixed data based on fixed data.

[0106] Reference Figure 3 and Figure 10 The shifting unit SHP receives a preset setting value SV from the outside and generates shift fixed data SFD based on the setting value SV and according to the first fixed data FD1 and the second fixed data FD2. The setting value SV may include information about the shift path for the first image FIM, and the shift path may include at least one of the first direction DR1 and the second direction DR2.

[0107] Step S104, which generates shifted fixed data SFD based on first fixed data FD1 and second fixed data FD2, includes step S104a, which generates shifted fixed data SFD based on first fixed data FD1 and second fixed data FD2 to shift the first image FIM in the first direction DR1.

[0108] The step S104a of generating shifted fixed data SFD to shift the first image FIM along the first direction DR1 includes step S104a_a of raising the first fixed data FD1 and the second fixed data FD2 so that the first image FIM displayed by the n pixels PX arranged along the first direction DR1 is displayed on the m pixels PX arranged along the first direction DR1. Furthermore, it includes step S104a_b of pulling down the raised first fixed data FD1 and the second fixed data FD2 so that the first image FIM displayed by the m pixels PX is displayed on the n pixels PX shifted by mn pixels PX along the first direction DR1.

[0109] Reference Figure 3 and Figure 11 The step S104 of generating shifted fixed data SFD based on the first fixed data FD1 and the second fixed data FD2 includes step S104b of generating shifted fixed data SFD based on the first fixed data FD1 and the second fixed data FD2 to shift the first image FIM in the second direction DR2.

[0110] The step S104b of generating shifted fixed data SFD to shift the first image FIM along the second direction DR2 includes step S104b_a of raising the first fixed data FD1 and the second fixed data FD2 so that the first image FIM displayed by j pixels PX arranged along the second direction DR2 is displayed on k pixels PX arranged along the second direction DR2. Furthermore, it includes step S104b_b of pulling down the raised first fixed data FD1 and the second fixed data FD2 so that the first image FIM displayed by k pixels PX is displayed on j pixels PX shifted kj pixels PX along the second direction DR2.

[0111] The above description refers to preferred embodiments of the present invention. However, those skilled in the art or those of ordinary skill in the art should understand that various modifications and changes can be made to the present invention without departing from the scope of the ideas and technical fields of the present invention as set forth in the claims.

[0112] Therefore, the scope of the present invention is not limited to the contents described in the detailed description of the specification, but should be determined only by the claims.

Claims

1. A display device, comprising: The display panel includes a compensation area, the compensation area including a first area configured to display a first image and a second area configured to display a second image and partially surround the first area; as well as The driver receives image signals from the outside and sends data signals to the display panel. The driver includes: an image retention compensation unit that transforms the image signal so that the first image is periodically shifted for display. The image retention compensation unit includes: The extraction unit extracts compensation region data from the image signal for the image displayed in the compensation region. The judgment unit generates a first judgment signal and a second judgment signal based on the compensation area data. The first judgment signal is generated when the first image includes a first sub-image corresponding to a letter and a second sub-image corresponding to a letter background image, and the second judgment signal is generated when the first image includes only the first sub-image. The computing unit, in response to receiving the first determination signal, calculates first fixed data, and in response to receiving the second determination signal, calculates second fixed data; and The shifting unit generates shifting fixed data that can only shift the first sub-image, based on the first fixed data or the second fixed data. The first fixed data includes data corresponding to the first sub-image and data corresponding to a portion of the second sub-image, and the second fixed data includes data corresponding to the first sub-image.

2. The display device according to claim 1, wherein, The shifting part Receive preset settings from the outside. Based on the set value, the shift fixation data is generated according to the fixed data. The set value includes information about the shift path for the first image.

3. The display device according to claim 2, wherein, The display panel includes multiple pixels. The shift path includes a first direction. The shifting unit generates the shifting fixed data based on the fixed data, causing the first image to shift in the first direction. After the fixed data is boosted so that the first image displayed by the n pixels arranged in the first direction is displayed on the m pixels arranged in the first direction, the boosted fixed data is pulled down so that the first image displayed by the m pixels is displayed on the n pixels shifted by mn pixels along the first direction, thereby generating the shifted fixed data. Here, n and m are natural numbers greater than 1, and m is a natural number greater than n.

4. The display device according to claim 3, wherein, The shift path also includes a second direction that intersects the first direction. The shifting unit generates the shifting fixed data based on the fixed data, causing the first image to shift in the second direction. After boosting the fixed data so that the first image displayed by j pixels arranged in the second direction is displayed on k pixels arranged in the second direction, the boosted fixed data is then pulled down so that the first image displayed by the k pixels is displayed on j pixels shifted kj pixels along the second direction. Here, j and k are natural numbers greater than 1, and k is a natural number greater than j.

5. The display device according to claim 1, wherein, The image retention compensation unit further includes a transformation unit that receives the shift-fixed data and transforms the shift-fixed data to generate image data. The driver generates the data signal based on the image data.

6. The display device according to claim 5, wherein, The driver includes: The controller receives the image signals and control signals from the outside. A source driver receives the image data and the control signal from the controller, and sends the data signal to the display panel; and The gate driver receives the control signal from the controller and sends a scan signal to the display panel. The image retention compensation unit is included in the controller.

7. A driving method for a display device, the display device comprising: The display panel includes a compensation area, the compensation area including a first area configured to display a first image and a second area configured to display a second image and partially surround the first area; The display device driving method includes: receiving image signals from the outside and sending data signals to the display panel, and a driver. The step of generating shift-fixed data such that when the first image and the second image are displayed in the compensation area, the pixels corresponding to the first image are shifted, while the pixels corresponding to the second image remain unchanged. The step of generating the shift-fixed data includes: extracting compensation region data from the image signal for the image displayed in the compensation region; The steps include generating a first judgment signal and a second judgment signal based on the compensated region data; generating the first judgment signal when the first image includes a first sub-image corresponding to a letter and a second sub-image corresponding to a letter background image; and generating the second judgment signal when the first image includes only the first sub-image; calculating first fixed data in response to receiving the first judgment signal; and calculating second fixed data in response to receiving the second judgment signal; and... The step of generating the shifted fixed data that can only shift the first sub-image based on the first fixed data or the second fixed data. The first fixed data includes data corresponding to the first sub-image and data corresponding to a portion of the second sub-image, and the second fixed data includes data corresponding to the first sub-image.

8. The driving method for the display device according to claim 7, wherein, In the step of generating the shift-fixed data Receive preset settings from the outside. Based on the set value, the shift fixation data is generated according to the fixed data. The set value includes information about the shift path for the first image.

9. The driving method for the display device according to claim 8, wherein, The display panel includes multiple pixels. The shift path includes a first direction. The step of generating the shift-fixed data includes: generating the shift-fixed data based on the fixed data so that the first image is shifted in the first direction. The step of generating the shift-fixed data to shift the first image in the first direction includes: The step of boosting the fixed data so that the first image displayed by n pixels arranged in the first direction is displayed on m pixels arranged in the first direction; and The step of pulling down the fixed data that will be boosted so that the first image displayed by the m pixels is displayed on the n pixels that have been shifted by mn pixels along the first direction. Here, n and m are natural numbers greater than 1, and m is a natural number greater than n.

10. The driving method for the display device according to claim 9, wherein, The shift path also includes a second direction that intersects the first direction. The step of generating the shift-fixed data further includes the step of generating the shift-fixed data based on the fixed data so that the first image is shifted in the second direction. The step of generating the shift-fixed data to shift the first image in the second direction includes: The step of increasing the fixed data so that the first image displayed by j pixels arranged in the second direction is displayed on k pixels arranged in the second direction; and The step of pulling down the fixed data that will be raised so that the first image displayed by the k pixels is displayed on the j pixels that have been shifted kj pixels along the second direction. Here, j and k are natural numbers greater than 1, and k is a natural number greater than j.

11. The driving method for the display device according to claim 7, further comprising: The steps of receiving the shift-fixed data and transforming the shift-fixed data to generate image data; as well as The step of generating the data signal based on the image data.

12. The driving method for the display device according to claim 11, wherein, The driver includes: The controller receives the image signals and control signals from the outside. A source driver receives the image data and the control signal from the controller, and sends the data signal to the display panel; and The gate driver receives the control signal from the controller and sends a scan signal to the display panel. The step of generating the shifted fixed data is implemented by the controller.

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