Display device and driving method of display device

Abstract

This invention discloses a display device and a driving method for the display device. The display device includes a display panel and a driving unit. The driving unit includes: an identifier compensation unit that generates identifier map data for an identifier area including an identifier image and compensates for the brightness of the identifier area using the identifier map data. The identifier compensation unit includes: an extraction unit that extracts identifier area data; an identifier calculation unit that calculates identifier map data including first data corresponding to a first image identified as an identifier image and second data corresponding to a second image identified as an identifier background image; an identifier judgment unit that sets a boundary region and judges whether the first region corresponding to the first data overlaps with the boundary region to output judgment data; and a brightness compensation unit that compensates for the brightness of the identifier area.

Description

Technical Field

[0001] This invention relates to a display device and a driving method for the display device, and more particularly to a display device for displaying an image including a logo and a driving method for the display device. Background Technology

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

[0003] The display device includes a display panel for displaying images and a drive circuit incorporated with the display panel and providing drive signals to the display panel. The display panel includes pixels that generate light. The organic light-emitting display device includes organic light-emitting diodes (OLEDs) that generate light.

[0004] Display devices apply current and voltage to pixels to display images. When a specific image is displayed on the display device for a long time, the pixels degrade, resulting in ghosting or a decrease in image quality.

[0005] Recently, in order to solve this problem, techniques have been used to display specific images by moving them at certain intervals or by reducing their brightness. Summary of the Invention

[0006] The purpose of this invention is to provide a display device that can prevent image quality degradation caused by brightness differences between the logo image and the surrounding logo background image.

[0007] The display device according to an embodiment of the present invention may include: a display panel, including a display area for displaying an image including a marker image and a non-marker image; and a driving unit for receiving an image signal from the outside and applying a data signal to the display panel. The driving unit may include: a marker compensation unit for generating marker map data for a marker area displaying the marker image in the display area, and compensating for the brightness of the marker area using the marker map data. The marker compensation unit may include: an extraction unit for extracting marker area data for the marker area from the image signal. The marker compensation unit may include: a marker calculation unit for calculating the marker map data based on the marker area data, including first data corresponding to a first image identified as the marker image and second data corresponding to a second image of a marker background image surrounding the marker image. Alternatively, the marker compensation unit may include: a marker determination unit for setting a portion of the marker area as a boundary area, and determining whether the first area in the marker area corresponding to the first image overlaps with the boundary area to output determination data; and a brightness compensation block for compensating for the brightness of the marker area based on the determination data.

[0008] As an embodiment of the present invention, the identification judgment unit may include: a boundary setting unit for setting the boundary region; a calculation unit for calculating an overlap value representing the degree of overlap between the boundary region and the first region; and an error judgment unit for comparing the overlap value with a set threshold, generating first judgment data when the overlap value is greater than the threshold, and generating second judgment data when the overlap value is less than or equal to the threshold.

[0009] As an embodiment of the present invention, the display panel may include a plurality of pixels, and the arithmetic unit may include: a counter that counts the number of pixels corresponding to the region that overlaps with the boundary region and the first region, and the arithmetic unit outputs the counted value as the overlap value.

[0010] As an embodiment of the present invention, the boundary region may be set around the border of the marked area.

[0011] As an embodiment of the present invention, the boundary region may be set so that it does not overlap with the area within the identification region where the identification image is displayed.

[0012] As an embodiment of the present invention, the brightness compensation block may include: a compensation judgment unit, which receives the judgment data from the error judgment unit and determines whether to compensate the brightness of the identification area.

[0013] As an embodiment of the present invention, the brightness compensation block may further include: a brightness compensation unit, which receives the image signal and compensates the image signal based on the identification map data and compensation data for compensating the brightness of the identification area corresponding to the first area to a set target brightness.

[0014] As an embodiment of the present invention, when the second judgment data is received, the compensation judgment unit applies the identification map data and the compensation data to the brightness compensation unit.

[0015] As an embodiment of the present invention, when the first judgment data is received, the compensation judgment unit may not apply at least one of the identification map data and the compensation data to the brightness compensation unit.

[0016] As an embodiment of the present invention, the driving unit may include: a timing control unit that receives the image signal and control signal from the outside and generates image data, a source control signal and a gate control signal; a source driving unit that receives the image data and the source control signal from the timing control unit; and a gate driving unit that receives the gate control signal from the timing control unit, wherein the identification compensation unit is included in the timing control unit.

[0017] As an embodiment of the present invention, the identification calculation unit may calculate the identification map data, which includes the first data and the second data, for a region wider than the identification region based on the identification region data.

[0018] According to an embodiment of the present invention, a driving method for a display device includes: a display panel, including a display area displaying an image including a marker image and a non-marker image; and a driving unit receiving an image signal from the outside and applying a data signal to the display panel. The driving method includes: generating marker map data for a marker area displaying the marker image in the display area, and compensating for the brightness of the marker area using the marker map data. Alternatively, the step of compensating for the brightness of the marker area may include: extracting marker area data for the marker area from the image signal. Or, the step of compensating for the brightness of the marker area may include: calculating, based on the marker area data, the marker map data including first data corresponding to a first image identified as the marker image and second data corresponding to a second image of a marker background image surrounding the marker image. Alternatively, the step of compensating for the brightness of the marker area may include: setting a portion of the marker area as a boundary area, determining whether the first area in the marker area corresponding to the first data overlaps with the boundary area, and outputting determination data; and compensating for the brightness of the marker area based on the determination data.

[0019] As an embodiment of the present invention, the step of outputting the judgment data may include: setting the boundary region; calculating an overlap value representing the degree of overlap between the boundary region and the first region; and comparing the overlap value with a set threshold, generating first judgment data when the overlap value is greater than the threshold, and generating second judgment data when the overlap value is less than or equal to the threshold.

[0020] As an embodiment of the present invention, the display panel may include a plurality of pixels, and the step of calculating the overlap value may include: counting the number of pixels corresponding to the region that overlaps with the boundary region and the first region; and outputting the counted value as the overlap value.

[0021] As an embodiment of the present invention, the boundary region may be set around the border of the marked area.

[0022] As an embodiment of the present invention, the boundary region may be set so that it does not overlap with the area within the identification region where the identification image is displayed.

[0023] As an embodiment of the present invention, the step of compensating the brightness of the marking area may further include: determining whether to compensate the brightness of the marking area based on the judgment data.

[0024] As an embodiment of the present invention, the step of compensating the brightness of the marked area may further include: receiving the image signal and compensating the brightness of the marked area based on the marked image data and compensation data for compensating the brightness of the marked area corresponding to the first area to a set target brightness.

[0025] As an embodiment of the present invention, in the step of determining whether or not to compensate, when the second determination data is received, the identification map data and the compensation data are output.

[0026] As an embodiment of the present invention, in the step of determining whether to compensate, when the first determination data is received, at least one of the identification map data and the compensation data is not output.

[0027] (The effect of the invention)

[0028] According to the present invention, it is possible to determine whether there are errors in the calculation of the signage data, which includes data corresponding to the image identified as a signage image and the image of the signage background image surrounding the image identified as a signage image. Therefore, when an error exists in the calculation of the signage data, the brightness of the area corresponding to the image identified as a signage image does not need to be compensated. This prevents the brightness of areas that are identified as signage images and displayed as signage background images even though they are not signage images from being compensated. This also prevents a degradation in the image quality displayed on the display panel. 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 identification compensation part according to an embodiment of the present invention.

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

[0033] Figure 5a as well as Figure 5b It is used for explanation Figure 3 A diagram illustrating an example of the operation of the computer unit.

[0034] Figure 6 yes Figure 3 The diagram shows the internal block diagram of the identification judgment unit and the brightness compensation block.

[0035] Figure 7a as well as Figure 7b It is used for explanation Figure 6 A diagram illustrating an example of the boundary setting section and the operation of the counter.

[0036] Figure 8 This is a flowchart illustrating a method for compensating the brightness of a marker area according to an embodiment of the present invention.

[0037] Figure 9 This is a flowchart illustrating the method for outputting data to determine whether there is overlap.

[0038] (Explanation of reference numerals in the attached diagram)

[0039] DD: Display device; DP: Display panel

[0040] IM: Image LIM: Image identifier

[0041] NLIM: Non-identifiable image; DA: Display area

[0042] RGB: Image signal; IDATA: Image data

[0043] CP: Drive Unit; LA: Identification Area

[0044] LCP: Identification and Compensation Department; EXP: Extraction Department

[0045] IM1: First image; IM2: Second image

[0046] LOP: Identifier Calculation Unit; LBI: Identifier Background Image

[0047] LJP: Identification and Judgment Unit AR1: First Area

[0048] AR2: Second Region JDA: Data Judgment

[0049] LUCP: Luminance Compensation Unit; BSP: Boundary Setting Unit

[0050] OLV: Overlapping Value; CCP: Computation Unit

[0051] STH: Threshold JDA1: First judgment data

[0052] JDA2: Second judgment data; EJP: Error judgment unit.

[0053] PX: Pixel; CT: Counter

[0054] CJP: Compensation Judgment Department; CDATA: Compensation Data

[0055] TCP: Timing Control Unit; SDB: Source Driver Unit

[0056] GDB: Gate Drive Section Detailed Implementation

[0057] In this specification, when a constituent element (or region, layer, part, etc.) is referred to as being "on", "connected to", or "integrated with" other constituent elements, it means that the constituent element can be directly configured / connected / integrated on other constituent elements, or that a third constituent element can be configured between them.

[0058] The same reference numerals refer to the same constituent elements. Furthermore, in the drawings, the thickness, scale, and dimensions of the constituent elements are enlarged for illustrative purposes.

[0059] "and / or" includes all combinations that can be defined by the relevant composition.

[0060] The terms "first," "second," etc., can be used to describe various constituent elements, but the constituent elements are not limited by the terms. The terms are used only to distinguish one constituent element from others. For example, without departing from the scope of the invention, a first constituent element may be named a second constituent element, and similarly, a second constituent element may be named a first constituent element. Singular expressions include plural expressions unless explicitly stated in the context.

[0061] In addition, terms such as "lower," "lower side," "upper," and "upper side" are used to describe the relational relationships of the structures shown in the accompanying drawings. These terms are relative concepts and are explained based on the directions indicated in the accompanying drawings.

[0062] Unless otherwise defined, all terms used in this specification (including technical and scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. Furthermore, terms such as those defined in commonly used dictionaries shall be interpreted as having the same meaning in the context of the relevant art, and may be explicitly defined herein unless interpreted as having an ideal or overly figurative meaning.

[0063] Terms such as “including” or “having” should be understood as indicating the presence of features, numbers, steps, operations, constituent elements, components, or combinations thereof as described in the specification, and do not preclude the existence or additional possibilities of one or more other features, numbers, steps, operations, constituent elements, components, or combinations thereof.

[0064] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

[0065] Figure 1 as well as Figure 2 This is a plan view of a display device according to an embodiment of the present invention.

[0066] Reference Figure 1 as well as 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. In this case, the second direction DR2 can be perpendicular to the first direction DR1. However, the shape of the display device DD is not limited to this; various shapes of display devices DD can be provided.

[0067] The display device DD according to the present invention can be a large display device such as a television set or monitor, or a small to medium-sized display device such as a portable telephone, tablet computer, car navigation system, or game console. Of course, these are merely examples, and can be applied to other electronic devices without departing from the concept of the present invention.

[0068] Reference Figure 1 as well as Figure 2 According to an embodiment of the present invention, a display device DD includes a display panel DP for displaying an image and a driving unit CP for driving the display panel DP. As an example of the present invention, the driving unit CP may include a timing control unit TCP, a gate driving unit GDB, and a source driving unit SDB.

[0069] The display panel DP includes a display area DA for displaying the image IM and a non-display area NDA adjacent to the display area DA. The display area DA is essentially the area where the image is displayed, while the non-display area NDA is the border area where no image is displayed. Figure 1 The diagram illustrates a non-display area NDA configured to surround the 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.

[0070] Images (IMs) can be displayed in the display area DA. Images (IMs) can include identifier images (LIMs) and non-identifier images (NLIMs). Identifier images (LIMs) can be images displayed at a fixed position with a specific grayscale level for a specified period of time. Identifier images can be static images, while non-identifier images can be either dynamic or static. For example, identifier images (LIMs) can include broadcaster logos, subtitles, dates, times, etc. IEMs can also include program titles, etc. Hereinafter, for ease of explanation, all types of images displayed at a fixed position with a specific grayscale level for a specified period of time will be referred to as identifier images (LIMs). Non-identifier images (NLIMs) can be images displayed in the remaining portion of the display area DA excluding identifier images (LIMs).

[0071] The timing control unit TCP receives image signals RGB and control signals CTRL from an external source. The timing control unit TCP converts the data format of the image signals RGB to match the interface specification of the source driver unit SDB to generate image data IMD. The timing control unit TCP converts the control signal CTRL to generate gate control signal GCS and source control signal SCS. The timing control unit TCP outputs image data IMD, source control signal SCS, and gate control signal GCS. The timing control unit TCP may include a marker compensation unit LCP. The marker compensation unit LCP can detect the marker image LIM based on the image signals RGB. To prevent pixel degradation and afterimages caused by marker images displayed through the same pixel PX over a long period, the marker compensation unit LCP can compensate for the brightness of the marker image LIM. As an embodiment of the present invention, the marker compensation unit LCP can reduce the brightness of the marker image LIM.

[0072] The source driver unit SDB receives the source control signal SCS and image data IMD from the timing control unit TCP. In response to the source control signal SCS, the source driver unit SDB converts the image data IMD into a data signal DS and outputs the data signal DS to the multiple data lines DL1 to DLm (described later). The data signal DS is an analog voltage corresponding to the grayscale value of the image data IMD.

[0073] The gate drive unit GDB receives the gate control signal GCS from the timing control unit TCP. In response to the gate control signal GCS, the gate drive unit GDB generates scan signals SS1 to SSn and outputs the scan signals SS1 to SSn to the multiple gate lines GL1 to GLn described later.

[0074] The display panel DP includes multiple gate lines GL1 to GLn, multiple data lines DL1 to DLm, and multiple pixels PX. The multiple gate lines GL1 to GLn extend in a first direction DR1 and are arranged parallel to each other in a second direction DR2 that intersects the first direction DR1. The multiple data lines DL1 to DLm can be arranged parallel to the first direction DR1 and extend in the second direction DR2.

[0075] Multiple pixels PX can be arranged in the display area DA in the first direction DR1 and the second direction DR2. As an example of the present invention, the multiple pixels PX can be configured in a matrix form. Each of the multiple pixels PX can be electrically connected to one of a plurality of gate lines GL1 to GLn and a plurality of data lines DL1 to DLm. Each pixel PX is turned on by scanning signals SS1 to SSn applied from the corresponding gate lines GL1 to GLn, and receives data signals DS from the corresponding data lines DL1 to DLm to display an image of the desired grayscale.

[0076] The gate driving unit GDB sequentially outputs scan signals SS1 to SSn to gate lines GL1 to GLn. Therefore, multiple pixels PX can be scanned sequentially in row units using scan signals SS1 to SSn. Each gate driving unit GDB may include a shift register that sequentially outputs scan signals SS1 to SSn. Figure 2 The diagram illustrates a structure where a gate driving unit GDB is electrically connected to gate lines GL1-GLn, but the invention is not limited thereto. That is, the gate driving unit GDB may include a first gate driving unit and a second gate driving unit. Specifically, the first gate driving unit may be electrically connected to one end of the gate lines GL1-GLn, and the second gate driving unit may be electrically connected to the other end of the gate lines GL1-GLn. The first and second gate driving units can operate simultaneously to simultaneously output scan signals SS1-SSn to the same gate lines GL1-GLn. Therefore, each gate line GL1-GLn can receive scan signals SS1-SSn from the first and second gate driving units through its two ends.

[0077] The gate driving section (GDB) can be integrated into the display panel (DP). That is, the gate driving section (GDB) can be formed in the non-display area (NDA) of the display panel (DP) using a thin-film process that forms a pixel (PX) in the display area (DA) of the display panel (DP).

[0078] The source driver unit (SDB) converts image data (IMD) into a data signal (DS) and applies the data signal (DS) to the data lines DL1 to DLm of the display panel (DP). The source driver unit (SDB) may include multiple driver chips. Each of the multiple driver chips is electrically connected to a corresponding data line among the data lines DL1 to DLm.

[0079] Each of the multiple pixels PX includes a light-emitting element (not shown) and a circuit section (not shown) for controlling the light emission of the light-emitting element. As one embodiment, the light-emitting element may be an organic light-emitting diode.

[0080] Figure 3 This is a block diagram illustrating an identification compensation part according to an embodiment of the present invention. Figure 4 It is a magnified view of the same Figure 1 An enlarged plan view of a portion of the display panel corresponding to AA'. Figure 5a And 5b is used for explanation Figure 3 A diagram illustrating an example of the operation of the computer unit.

[0081] Reference Figures 3 to 5b The label compensation unit LCP may include an extraction unit EXP, a label calculation unit LOP, a label judgment unit LJP, and a brightness compensation block LUB.

[0082] The extraction unit EXP can extract label region data LAD from the RGB image signal, specifically for the label region LA of the display label image LIM and the label background image LBI surrounding the label image LIM. In one embodiment, the extraction unit EXP may include an artificial intelligence program that performs machine learning for detecting the label region LA. As an example, the extraction unit EXP may utilize machine learning based on a convolutional neural network model or the like to extract the label region LA. Alternatively, the extraction unit EXP may utilize an artificial intelligence program that performs not only machine learning but also deep learning to extract the label region LA. The extraction unit EXP may analyze the image IM displayed during a predetermined time period to extract the label region LA. Furthermore, it may analyze frames of the image IM that repeat at a specific time point to extract the label region LA.

[0083] exist Figure 4 The diagram shows the identifier region LA extracted by the extraction unit EXP. As an example of the present invention, the identifier region LA includes an identifier image LIM displayed as "SBS," a background image LBI1 surrounding "SBS," and an identifier background image LBI2 showing the rod-like shape at the lower end of "SBS." In this case, the background LBI1 surrounding "SBS" may have a large difference in grayscale compared to the identifier image LIM, while the rod-like shape LBI2 at the lower end of "SBS" may have the same grayscale or a small difference in grayscale compared to the identifier image LIM.

[0084] The identifier calculation unit (LOP) can receive the applied identifier region data (LAD) from the extraction unit (EXP). Based on the identifier region data (LAD), the identifier calculation unit (LOP) can calculate identifier map data (LMD), which includes first data corresponding to a first image IM1 identified as an identifier image LIM within the identifier region LA and second data corresponding to a second image IM2 identified as an identifier background image LBI.

[0085] The LOP (Location Calculation Unit) segments the label region LA into a first region AR1 corresponding to the first image IM1 identified as the label image LIM and a second region AR2 corresponding to the second image IM2 identified as the label background image LBI, generating a label image LM. It then calculates the label image data LMD corresponding to the label image LM. At this time, the LOP can segment the label region LA using binarization. As an example of this invention, Otsu's binarization algorithm can be used for the segmentation of the label region LA. The LOP can generate a histogram related to the grayscale of the label region data LAD, and then set a threshold for dividing the label image LIM and the label background image LBI based on the histogram. At this point, based on a threshold, the identifier region LA can be segmented into a first region AR1 corresponding to the first image IM1 identified as the identifier image LIM and a second region AR2 corresponding to the second image IM2 identified as the identifier background image LBI, thereby generating an identifier image LM including the first image IM1 and the second image IM2. In this case, the first data corresponding to the first image IM1 can be defined as "1" in binary, and the second data corresponding to the second image IM2 can be defined as "0" in binary. As an example of the present invention, it can be as follows... Figure 5a as well as Figure 5b As shown, the region that is determined to be "1" in binary is called the first region AR1, and the region that is determined to be "0" in binary is called the second region AR2.

[0086] Reference Figure 5a as well as Figure 5bThe diagram illustrates an identifier image LM where the identifier calculation unit LOP divides the identifier region LA into a first region AR1 corresponding to the first image IM1 and a second region AR2 corresponding to the second image IM2. In this case, the identifier calculation unit LOP not only identifies the identifier image LIM (i.e., "SBS") within the identifier region LA, but also identifies a portion of the identifier background image LBI (i.e., the rod-shaped LBI2 at the lower end of "SBS") as the identifier image LIM and divides it into the first region AR1. Furthermore, it identifies the remaining portion of the identifier region LA excluding the first region AR1 as the identifier background image LBI and divides it into the second region AR2. That is, the identifier calculation unit LOP can not only identify the portion of the identifier region LA corresponding to the identifier image LIM as the identifier image LIM and divide it into the first region AR1, but it can also identify the identifier image LIM and a portion of the identifier background image LBI, which has the same or similar grayscale as the identifier image LIM, as the identifier image LIM and divide it into the first region AR1. Furthermore, the label calculation unit LOP can receive the applied label region data LAD. It not only segments the label region LA detected by the extraction unit EXP, but also divides a region wider than the label region LA into a first region AR1 identified as the label image LIM and a second region AR2 identified as the label background image LBI, generating a label map LM, and calculating label map data LMD including the corresponding first and second data. In this case, after determining the position of the label region LA through the label region data LAD, the label calculation unit LOP segments the image signal RGB including the label region LA, generates a label map LM for a region wider than the label region LA, and calculates the corresponding label map data LMD. Even when the label image LIM is not entirely included in the label region LA, segmentation of the first region AR1 identified as the label image LIM is still possible.

[0087] The identifier determination unit LJP can receive the application of identifier region data LAD from the extraction unit EXP and the application of identifier map data LMD from the identifier calculation unit LOP. Additionally, the identifier determination unit LJP can receive the application of a pre-set threshold STH. The identifier determination unit LJP can designate a portion of the identifier region LA as a boundary region, determine whether the first region AR1 corresponding to the first image IM1 in the identifier region LA overlaps with the boundary region, and output determination data JDA. (See reference...) Figures 6 to 7b The function, structure, and operation of the identification and judgment unit LJP will be described later.

[0088] The brightness compensation block LUB can compensate the brightness of the marker area LA based on the judgment data JDA. The brightness compensation block LUB can receive image signals RGB from an external source, receive judgment data JDA from the marker judgment unit LJP, and receive marker map data LMD from the marker calculation unit LOP. Additionally, the brightness compensation block LUB can receive compensation data CDATA from the timing control unit TCP.

[0089] The timing control unit TCP can generate compensation data CDATA by histogram analysis related to the grayscale of the identifier region data LAD, etc., to compensate the brightness of the first region AR1 in the identifier region LA, corresponding to the first image IM1, to a preset target brightness. At this time, the compensation data CDATA can be analyzed based on the image IM displayed during a preset time period. The brightness compensation block LUB can compensate the brightness of the identifier region LA based on the identifier map data LMD and the compensation data CDATA. The brightness compensation block LUB outputs image data IMD including first data where the brightness of the first region AR1 in the identifier region LA is compensated to the preset target brightness.

[0090] Figure 6 yes Figure 3 The diagram shows the internal block diagram of the identification judgment unit and the brightness compensation block. Figure 7a as well as Figure 7b It is used for explanation Figure 6 A diagram illustrating an example of the boundary setting section and the operation of the counter.

[0091] Reference Figures 6 to 7b The identification and judgment unit LJP may include a boundary setting unit BSP, an arithmetic unit CCP, and an error judgment unit EJP.

[0092] The boundary setting unit (BSP) can receive the identifier region data (LAD) from the extraction unit (EXP). The BSP can set a portion of the identifier region (LA) as a boundary region and output boundary region data (BAD) containing information related to the set boundary region. The boundary region can be defined around the border of the identifier region (LA). Specifically, when the identifier region (LA) is a quadrilateral shape with four sides, the boundary region can be the region adjacent to each of the four sides. In particular, the boundary region can be the region defined inwards from each side, and the width of the region adjacent to each of the four sides of the identifier region (LA) is the same as the sum of the widths of n pixels. In this case, n can be 2 to 3 pixels. The boundary region can be set so that it does not overlap with the area of ​​the displayed identifier image (LIM) within the identifier region (LA). However, it is not limited to this; the boundary region can be set in various forms within the identifier region (LA). The setting of the boundary region can serve as a reference for calculating the overlap value (OLV), which represents the degree of overlap between the boundary region and the first region (AR1), as described later.

[0093] The computation unit CCP can receive boundary region data BAD from the boundary setting unit BSP and identifier map data LMD from the identifier calculation unit LOP. The computation unit CCP can calculate an overlap value OLV, representing the degree of overlap between the boundary region and the identifier region LA, specifically the first region AR1. The computation unit CCP may include a counter CT that counts the number of pixels PX corresponding to the regions overlapping with the boundary region and the first region AR1. The computation unit CCP can output the value counted by the counter CT as the overlap value OLV.

[0094] Reference Figure 7a As an example of the present invention, a first boundary region BA1 can be set by the boundary setting unit BSP. This first boundary region BA1 includes regions adjacent to the four sides of the identifier region LA, and the region adjacent to the side of the identifier region LA parallel to the first direction DR1 has a first width W1, and the region adjacent to the side of the identifier region LA parallel to the second direction DR2 has a second width W2. In this case, a predetermined area where the first boundary region BA1 and the first region AR1 displaying the first image IM1 overlap can be set as a first overlapping region OLA1. At this time, the calculation unit CCP can output the number of pixels corresponding to the first overlapping region OLA1, counted by the counter CT, as an overlap value OLV.

[0095] Reference Figure 7b As an example of the present invention, a second boundary region BA2 can be set by the boundary setting unit BSP. This second boundary region BA2 includes regions adjacent to the four sides of the identifier region LA, and the region adjacent to the side of the identifier region LA parallel to the first direction DR1 has a third width W3, and the region adjacent to the side of the identifier region LA parallel to the second direction DR2 has a fourth width W4. A predetermined area where the second boundary region BA2 overlaps with the first region AR1 displaying the first image IM1 can be set as a second overlapping region OLA2. At this time, the calculation unit CCP can output the number of pixels corresponding to the second overlapping region OLA2, counted by the counter CT, as an overlap value OLV.

[0096] The overlap value (OLV) can vary depending on how the boundary setting unit (BSP) defines the boundary region. For example, when the boundary setting unit (BSP) sets the boundary region to become... Figure 7a When the first boundary region BA1 is shown, the overlap value OLV will be higher than when the boundary region is set to... Figure 7b The value decreases when the second boundary region BA2 is shown. Therefore, without changing the previously set threshold STH, the boundary setting unit BSP can change the boundary region setting to alter the judgment criteria for whether the LMD calculation of the LOP identification map data is incorrect.

[0097] The error detection unit EJP can receive the overlap value OLV from the calculation unit CCP. Additionally, the error detection unit EJP can receive a pre-set threshold STH from an external source. The threshold STH can be set in units of pixels. The error detection unit EJP can compare the overlap value OLV with the pre-set threshold STH. When the overlap value OLV is greater than the threshold STH, it generates first judgment data JDA1; when the overlap value OLV is less than or equal to the pre-set threshold STH, it generates second judgment data JDA2. The threshold STH can serve as the criterion for determining whether the LMD calculation of the identifier image data by the identifier calculation unit LOP is erroneous. Specifically, when the areas of the first overlap region OLA1 and the second overlap region OLA2 are constant, if the overlap value OLV is less than or equal to the threshold STH, it is determined that there is no error in the identifier image data LMD calculation; if the overlap value OLV is greater than the threshold STH, it is determined that there is an error in the identifier image data LMD calculation.

[0098] The brightness compensation block (LUB) may include a compensation judgment unit (CJP) and a brightness compensation unit (LUCP).

[0099] The compensation judgment unit CJP can receive judgment data JDA (refer to) from the error judgment unit EJP. Figure 3 The application of ) and from the identification calculation unit LOP (refer to Figure 3 The system receives LMD (Large Dimension Map) data. Additionally, the Compensation Judgment Unit (CJP) can receive compensation data CDATA from the Timing Control Unit (TCP). The CJP can also receive judgment data JDA from the Error Judgment Unit (EJP) to determine whether brightness compensation is required for the marker area LA. When receiving second judgment data JDA2 from the Error Judgment Unit (EJP), the CJP can apply both the LMD data and the compensation data CDATA to the Brightness Compensation Unit (LUCP). When receiving first judgment data JDA1 from the Error Judgment Unit (EJP), the CJP can choose not to apply at least one of the LMD data and the compensation data CDATA to the Brightness Compensation Unit (LUCP).

[0100] The luminance compensation unit LUCP can receive the application of image signal RGB from an external source. Additionally, when the error judgment unit EJP outputs first compensation data JDA1, the luminance compensation unit LUCP can receive the application of marker map data LMD and compensation data CDATA from the compensation judgment unit CJP. When the error judgment unit EJP outputs second compensation data JDA2, the luminance compensation unit LUCP may not receive the application of at least one of the marker map data LMD and compensation data CDATA. When the luminance compensation unit LUCP receives the application of marker map data LMD and compensation data CDATA, it can compensate for the brightness of the first region AR1 in the marker area LA based on the marker map data LMD and compensation data CDATA. The luminance compensation unit LUCP can convert the image signal RGB and output image data IMD including first data that compensates the brightness of the first region AR1 in the marker area LA to a preset target brightness.

[0101] When the luminance compensation unit LUCP does not receive the application of at least one of the identifier map data LMD and the compensation data CDATA, the luminance compensation unit LUCP does not compensate for the luminance of the first data. When the identifier map data LMD is not received, the luminance compensation unit LUCP cannot compensate for the luminance of the first data because it lacks information related to the object whose luminance needs to be compensated, i.e., the first data. When the compensation data CDATA is not received, the luminance compensation unit LUCP cannot compensate for the luminance of the first data because it lacks information related to the luminance compensation level of the first data, i.e., the set target luminance. In this case, the luminance compensation unit LUCP can convert the image signal RGB to generate image data IMD without compensating for the luminance of the first region AR1.

[0102] Figure 8 as well as Figure 9 This is a flowchart illustrating a driving method for an identification compensation unit according to an embodiment of the present invention.

[0103] The following is through Figure 8 as well as Figure 9 For the LCP (Reference) of the Identification Compensation Department Figure 3 The operation of the brightness compensation indicator area is explained in detail.

[0104] Reference Figure 3 as well as Figure 8The LCP (Limiter Capacitor Compensation Unit) extracts the label region data LAD (Label Region Data) for the label region LA from the RGB image signal (S100). Based on the LAD, the LCP calculates the label map data LMD (Label Map Data), which includes first data and second data (S200). Then, based on the LAD, the LCP sets the boundary region within the label region LA, and based on the LMD, determines whether the boundary region overlaps with the first region AR1 corresponding to the first data, calculating the judgment data JDA (S300). The LCP compensates for the brightness of the label region LA according to the judgment data JDA (S400).

[0105] Reference Figure 3 as well as Figure 9 The LCP (Label Compensation Unit) sets a portion of the label region LA as a boundary region based on the label region data LAD (S301). The LCP calculates a first region AR1 corresponding to the first data based on the label map data LMD, and counts the number of pixels corresponding to the region overlapping with the boundary region and the first region AR1 to calculate the overlap value OLV (S302). Then, the LCP compares the overlap value OLV with a pre-set threshold STH to generate judgment data JDA (S303). When the overlap value OLV is greater than the threshold STH, first judgment data JDA1 is generated; when the overlap value OLV is less than or equal to the threshold STH, second judgment data JDA2 is generated.

[0106] The above description refers to preferred embodiments of the present invention. However, those skilled in the art or those with ordinary knowledge in the art will understand that various modifications and alterations can be made to the present invention without departing from the concept and scope of the invention as set forth in the following claims.

[0107] Therefore, the technical scope of this invention should not be limited by the details described in the specification, but should be determined by the claims.

Claims

1. A display device, comprising: The display panel includes a display area for displaying images, including both labeled and unlabeled images; as well as The driving unit receives image signals from the outside and applies data signals to the display panel. The drive unit includes: The label compensation unit generates label map data for the label area in the display area that displays the label image and the label background image surrounding the label image, and uses the label map data to compensate for the brightness of the label area. The identification compensation unit includes: The extraction unit extracts identifier region data for the identifier region from the image signal; The identification calculation unit calculates identification map data based on the identification area data, including first data corresponding to a first image identified as the identification image and second data corresponding to a second image of the identification background image surrounding the identification image. The identification determination unit sets a portion of the identified area as a boundary area, and determines whether a first area within the identified area corresponding to the first image overlaps with the boundary area, thereby outputting determination data; and The brightness compensation block compensates for the brightness of the marked area based on the judgment data. The identifier determination unit includes: A boundary setting unit defines the boundary region; The arithmetic unit calculates an overlap value representing the degree of overlap between the boundary region and the first region; and The error judgment unit compares the overlap value with a set threshold. When the overlap value is greater than the threshold, it generates first judgment data indicating that there is an error in the calculation of the identification map data. When the overlap value is less than or equal to the threshold, it generates second judgment data indicating that there is no error in the calculation of the identification map data.

2. The display device according to claim 1, wherein, The display panel includes multiple pixels. The arithmetic unit includes: A counter counts the number of pixels corresponding to the regions that overlap with the boundary region and the first region. The arithmetic unit outputs the count value as the overlap value.

3. The display device according to claim 2, wherein, The boundary region is defined around the border of the marked area.

4. The display device according to claim 3, wherein, The boundary region is set to not overlap with the area within the label region where the label image is displayed.

5. The display device according to claim 1, wherein, The brightness compensation block includes: The compensation judgment unit receives the judgment data from the error judgment unit and determines whether to compensate the brightness of the identification area.

6. The display device according to claim 5, wherein, The brightness compensation block also includes: The brightness compensation unit receives the image signal and compensates the image signal based on the identification map data and compensation data for compensating the brightness of the identification area corresponding to the first area to a preset target brightness.

7. The display device according to claim 6, wherein, When the second judgment data is received, the compensation judgment unit applies the identification map data and the compensation data to the brightness compensation unit.

8. The display device according to claim 6, wherein, When the first judgment data is received, the compensation judgment unit will not apply at least one of the identification map data and the compensation data to the brightness compensation unit.

9. The display device according to claim 1, wherein, The drive unit includes: The timing control unit receives the image signal and control signal from the outside and generates image data, source control signal and gate control signal; The source drive unit receives the image data and the source control signal from the timing control unit; and The gate driving unit receives the gate control signal from the timing control unit. The identification compensation unit is included in the timing control unit.

10. The display device according to claim 1, wherein, The identification calculation unit calculates the identification map data, which includes the first data and the second data, for a region wider than the identification region based on the identification region data.

11. A driving method of a display device, the display device comprising: The display panel includes a display area for displaying images, including both labeled and unlabeled images; And a driving unit that receives image signals from the outside and applies data signals to the display panel. The driving method for the display device includes: The steps include generating identifier map data for the identifier area in the display area that displays the identifier image and the identifier background image surrounding the identifier image, and using the identifier map data to compensate for the brightness of the identifier area. The steps for compensating for the brightness of the marked area include: The step of extracting identifier region data for the identifier region from the image signal; The step of calculating the signage map data based on the signage area data, including first data corresponding to a first image identified as the signage image and second data corresponding to a second image identified as a signage background image surrounding the signage image; The steps include: setting a portion of the identified area as a boundary area, and determining whether the first area within the identified area corresponding to the first data overlaps with the boundary area to output judgment data; and... The step of compensating the brightness of the marked area based on the judgment data. The steps for outputting the judgment data include: The steps for defining the boundary region; The steps of calculating an overlap value representing the degree of overlap between the boundary region and the first region; and The steps involve comparing the overlap value with a set threshold, generating first judgment data indicating an error in the calculation of the identifier map data when the overlap value is greater than the threshold, and generating second judgment data indicating no error in the calculation of the identifier map data when the overlap value is less than or equal to the threshold.

12. The driving method for the display device according to claim 11, wherein, The display panel includes multiple pixels. The steps for calculating the overlap value include: The step of counting the number of overlapping pixels in the boundary pixels corresponding to the boundary region and the first pixels corresponding to the first region; and The step of outputting the value of the count as the overlap value.

13. The driving method for the display device according to claim 12, wherein, The boundary region is defined around the border of the marked area.

14. The driving method for the display device according to claim 13, wherein, The boundary region is set to not overlap with the area within the label region where the label image is displayed.

15. The driving method for a display device according to claim 11, wherein, The step of compensating for the brightness of the marked area further includes: The step of determining whether to compensate the brightness of the marked area based on the judgment data.

16. The driving method for a display device according to claim 15, wherein, The step of compensating for the brightness of the marked area further includes: The steps include receiving the image signal and compensating the brightness of the identification area based on the identification map data and compensation data for compensating the brightness of the identification area corresponding to the first area to a set target brightness.

17. The driving method for a display device according to claim 16, wherein, In the step of determining whether to compensate for the brightness of the marked area When the second judgment data is received, the identification map data and the compensation data are output.

18. The driving method for a display device according to claim 16, wherein, In the step of determining whether to compensate for the brightness of the marked area When the first judgment data is received, at least one of the identification map data and the compensation data is not output.

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