Compensation system for display device and compensation method for display device

Abstract

Disclosed are a compensation system of a display device and a compensation method for the display device, the compensation system of the display device according to an embodiment including: a display panel including a first emission area and a second emission area different from the first emission area, each of the first emission area and the second emission area including one or more pixels; a camera configured to photograph the display panel at one or more viewpoints; and a compensation controller that calculates color coordinate data of the first emission region and the second emission region and generates gradation compensation data based on the color coordinate data. The gradation compensation data may be used to control a gradation value of one or more pixels included in the second emission region.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to and the benefit of Korean Patent Application No. 10-2024-0018809, filed on February 7, 2024, which is hereby incorporated by reference for all purposes as if fully set forth herein. Technical Field

[0003] Embodiments relate to a compensation system for a display device and a compensation method for a display device. Background Art

[0004] Recently, flat panel display devices such as liquid crystal display (LCD) devices, plasma display panel (PDP) devices, and organic light emitting display (OLED) devices are mainly used as image display devices.

[0005] In an organic light-emitting display device, a pixel includes multiple transistors, a storage capacitor, and an organic light-emitting diode. The display panel of the organic light-emitting display device may be composed of multiple layers, and light output from the display panel may pass through the multiple layers and be output through the upper surface of the organic light-emitting display panel.

[0006] In this case, light output from the display panel may interfere with each other. Therefore, even when image data of the same color and brightness are output to pixels of the display panel, the image output through the display panel may have irregular color deviation depending on the viewing angle.

[0007] The above description is only intended to help understand the background technology of the technical concept of the present invention. Therefore, it cannot be understood as corresponding to the prior art known to those skilled in the art to which the present invention belongs. Summary of the Invention

[0008] Embodiments relate to a compensation system for a display device. The compensation system for a display device according to embodiments may include: a display panel including a first emission region and a second emission region different from the first emission region, each of the first emission region and the second emission region including one or more pixels; a camera configured to capture the display panel at one or more viewpoints; and a compensation controller that calculates color coordinate data for the first emission region and the second emission region and generates grayscale compensation data based on the color coordinate data. The grayscale compensation data may be used to control the grayscale value of one or more pixels included in the second emission region.

[0009] The one or more viewpoints may include: a first viewpoint; and a second viewpoint tilted at a first angle from the first viewpoint. The compensation controller may include a coordinate calculator. The coordinate calculator may be configured to calculate first color coordinate data of a first emission area corresponding to the first viewpoint, calculate second color coordinate data of the first emission area corresponding to the second viewpoint, and calculate third color coordinate data of the second emission area corresponding to the first viewpoint.

[0010] The compensation controller may further include a compensation data generator. The compensation data generator may generate the first grayscale compensation data by adding a value obtained by subtracting the second color coordinate data from the first color coordinate data to the third color coordinate data.

[0011] The one or more viewpoints may further include a third viewpoint tilted from the first viewpoint at a second angle greater than the first angle. The coordinate calculator may calculate fourth color coordinate data of the first emission area corresponding to the third viewpoint, and the compensation data generator may generate second grayscale compensation data by adding a value obtained by subtracting the fourth color coordinate data from the first color coordinate data to the third color coordinate data.

[0012] The first grayscale compensation data may include information about the grayscale values of one or more pixels located in the second emission area corresponding to the second viewpoint, and the second grayscale compensation data may include information about the grayscale values of one or more pixels located in the second emission area corresponding to the third viewpoint.

[0013] The compensation data generator may interpolate the first grayscale compensation data and the second grayscale compensation data to generate grayscale compensation data corresponding to at least one viewpoint existing between the second viewpoint and the third viewpoint.

[0014] The compensation system of the display device may further include a memory storing grayscale compensation data, and the memory may store the grayscale compensation data in the form of a lookup table to correspond to each of the one or more viewpoints.

[0015] The compensation system of the display device may further include a visual sensor that senses eyes of a user on the display device and generates visual sensing data; and a grayscale converter that generates image data based on the grayscale compensation data and the visual sensing data.

[0016] The visual sensing data may include information about a position between the user's eyes and the display panel.

[0017] The first emission area may be disposed at the center of the display panel, and the second emission area may be disposed around the first emission area.

[0018] Embodiments relate to a compensation method for a display device. The compensation method for a display device according to embodiments may include: photographing a first emission area of a display panel at a first viewpoint; photographing the first emission area of the display panel at a second viewpoint tilted at a first angle from the first viewpoint; photographing a second emission area of the display panel at the first viewpoint, the second emission area being different from the first emission area; calculating color coordinate data for the first emission area and the second emission area; and generating grayscale compensation data based on the color coordinate data. The grayscale compensation data may be used to control the grayscale value of one or more pixels included in the second emission area.

[0019] Calculating color coordinate data may include: calculating first color coordinate data of the first emission area corresponding to the first viewpoint; calculating second color coordinate data of the first emission area corresponding to the second viewpoint; and calculating third color coordinate data of the second emission area corresponding to the first viewpoint.

[0020] Generating the grayscale compensation data may include generating the first grayscale compensation data by adding a value obtained by subtracting the second color coordinate data from the first color coordinate data to the third color coordinate data.

[0021] The compensation method for a display device may further include photographing the first emission area of the display panel at a third viewpoint tilted from the first viewpoint at a second angle greater than the first angle. Calculating color coordinate data may include calculating fourth color coordinate data of the first emission area corresponding to the third viewpoint.

[0022] Generating the grayscale compensation data may include generating second grayscale compensation data by adding a value obtained by subtracting the fourth color coordinate data from the first color coordinate data to the third color coordinate data.

[0023] Generating the gray compensation data may include interpolating the first gray compensation data and the second gray compensation data to generate gray compensation data corresponding to at least one viewpoint existing between the second viewpoint and the third viewpoint.

[0024] The first grayscale compensation data may include information about the grayscale values of one or more pixels located in the second emission area corresponding to the second viewpoint, and the second grayscale compensation data may include information about the grayscale values of one or more pixels located in the second emission area corresponding to the third viewpoint.

[0025] The compensation method for a display device may further include: generating a visual sensing signal by sensing eyes of a user on the display panel; and generating image data based on the grayscale compensation data and the visual sensing signal. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings are included to provide a further understanding of the inventive concept and are incorporated in and constitute a part of this specification. They illustrate preferred embodiments of the inventive concept and together with the description serve to explain the principles of the inventive concept.

[0027] Figure 1 is a perspective view illustrating a compensation system of a display device according to an embodiment.

[0028] Figure 2 is a block diagram illustrating a compensation system of a display device according to an embodiment.

[0029] Figure 3 It shows Figure 2 One of the pixels in the figure is used as an example.

[0030] Figure 4 is a block diagram illustrating a compensation apparatus according to an embodiment.

[0031] Figure 5 It shows Figure 4 A block diagram of an embodiment of a compensation controller.

[0032] Figure 6 is a flowchart illustrating a compensation method for a display device according to an embodiment.

[0033] Figure 7 It shows Figure 6 Flowchart of an embodiment of the steps of generating grayscale compensation data.

[0034] Figure 8 is a side view showing a display panel and a compensation device disposed at a first viewpoint.

[0035] Figure 9 Is shown by Figure 8 A plan view of the display panel taken with the compensation device.

[0036] Figure 10 is a side view showing a display panel and a compensation device disposed at a second viewpoint.

[0037] Figure 11 Is shown by Figure 10 A plan view of the display panel taken with the compensation device.

[0038] Figure 12 : is a diagram showing values of first to third color coordinate data according to the embodiment.

[0039] Figure 13 is a side view showing a display panel and a compensation device disposed at a third viewpoint.

[0040] Figure 14 is a side view showing a display panel and a compensation device disposed at a fourth viewpoint.

[0041] Figure 15 is a diagram illustrating a lookup table stored in a memory according to an embodiment.

[0042] Figure 16 is a diagram showing grayscale compensation values corresponding to each of a plurality of viewpoints.

[0043] Figure 17 is a block diagram illustrating a compensation system of a display device according to an embodiment. DETAILED DESCRIPTION

[0044] Hereinafter, embodiments of the present invention will be described in more detail with reference to the accompanying drawings. It should be noted that in the following description, only the parts necessary for understanding the operation of the present invention will be described, and in order not to obscure the main points of the present invention, the description of other parts will be omitted. In addition, the present invention is not limited to the embodiments described herein and can be implemented in other forms. The embodiments described herein are merely provided to provide a detailed explanation sufficient to enable those skilled in the art to easily implement the technical ideas of the present invention.

[0045] Figure 1 is a perspective view illustrating a compensation system 1000 of a display device 100 according to an embodiment.

[0046] refer to Figure 1 , the compensation system 1000 of the display device 100 may include the display device 100 and the compensation device 200 .

[0047] The display device 100 can display images via the display surface IS. In this embodiment, an embodiment in which the display device 100 is implemented as a smartphone will be described as an example. However, the present invention is not limited thereto. If the display device 100 is an electronic device with a display surface IS applied to one side, such as a television, tablet PC, mobile phone, video phone, e-reader, desktop PC, laptop PC, netbook computer, workstation, server, MP3 player, medical device, camera, or wearable device, the present invention can be applied.

[0048] As an embodiment, the display device 100 may be an organic light-emitting display device. However, the present invention is not limited thereto. Without changing the spirit of the present invention, the display device 100 may be implemented as a quantum dot light-emitting display device, a liquid crystal display device, a micro-LED (light-emitting diode) display device, etc.

[0049] The display surface IS may include a display area DA as an area where an image is displayed and a non-display area NDA adjacent to the display area DA.

[0050] The non-display area NDA may be an area where no image is displayed. Sensors, cameras, etc. may be installed in the non-display area NDA. The display area DA may have a square shape. When viewed from a flat surface, the non-display area NDA may be arranged to surround the display area DA. However, embodiments are not limited thereto.

[0051] The display area DA may include a plurality of emission areas EA separated from each other. The emission areas EA may be arranged in the first direction DR1 and the second direction DR2. However, the present invention is not limited thereto.

[0052] Any one of the emission areas EA can emit light having one of the grayscale values to be displayed. For example, the grayscale value can be one of 0 to 255 grayscales based on a red pattern, a green pattern, a blue pattern, a mixed color pattern thereof, or a gray pattern. Hereinafter, a case of having one of the grayscale values 0 to 255 based on a gray pattern will be described as an example. However, embodiments are not limited thereto.

[0053] According to an embodiment, the emission area EA may include one or more pixels PX (see Figure 2 However, hereinafter, the emission area EA will be described as a region including a plurality of pixels PX.

[0054] The compensation device 200 may be positioned in front of the display device 100 (e.g., facing the display surface IS) and may capture an image displayed in the display area DA. For example, the compensation device 200 may include an imaging device (image capture device) such as a camera. The compensation device 200 may move relative to the display device 100 and capture the display device 100 at one or more viewpoints (e.g., multiple viewpoints).

[0055] Figure 2 is a block diagram illustrating a compensation system 1000 of a display device 100 according to an embodiment. Figure 3 It shows Figure 2 One of the pixels PX is taken as an example in the figure.

[0056] refer to Figure 2 , the compensation system 1000 of the display device 100 may include the display device 100 and the compensation device 200 .

[0057] The display device 100 may include a display panel 110 , a scan driver 120 , an emission driver 130 , a data driver 140 , a timing controller 150 , and a grayscale converter 160 .

[0058] refer to Figure 2 and Figure 3The display panel 110 may include one or more pixels PX. Each pixel PX may include a plurality of sub-pixels SP. For example, the pixel PX may include a first sub-pixel SP1, a second sub-pixel SP2, and a third sub-pixel SP3. The first sub-pixel SP1, the second sub-pixel SP2, and the third sub-pixel SP3 may each emit primary color light to configure the three primary colors of light.

[0059] The first subpixel SP1 may emit light of a first color, the second subpixel SP2 may emit light of a second color different from the first color, and the third subpixel SP3 may emit light of a third color different from the first and second colors.

[0060] For example, the first color may be a color belonging to a red wavelength band. For example, the second color may be a color belonging to a green wavelength band. For example, the third color may be a color belonging to a blue wavelength band.

[0061] For example, the first subpixel SP1 may emit light in a wavelength range of approximately 630 nm to 750 nm. For example, the second subpixel SP2 may emit light in a wavelength range of approximately 495 nm to 570 nm. For example, the third subpixel SP3 may emit light in a wavelength range of approximately 450 nm to 495 nm.

[0062] Unlike the above, the first subpixel SP1 may emit light in a green wavelength band or a blue wavelength band, the second subpixel SP2 may emit light in a blue wavelength band or a red wavelength band, and the third subpixel SP3 may emit light in a red wavelength band or a green wavelength band.

[0063] According to an embodiment, the sub-pixel SP may be configured such as a stripe or The arrangement structure is arranged, but the present inventive concept is not limited thereto, and various embodiments can be applied to the present disclosure.

[0064] Each of the subpixels SP may be connected to first to nth scan lines SL1 to SLn, first to mth data lines DL1 to DLm, and first to nth emission control lines EL1 to ELn, where n and m may be integers greater than or equal to 1.

[0065] The scan driver 120 may be configured to supply scan signals to the plurality of scan lines SL1 to SLn. According to an embodiment, the scan driver 120 may be configured to sequentially supply scan signals to the plurality of scan lines SL1 to SLn, but the present invention is not limited thereto. The scan driver 120 may receive a scan drive signal SCS and supply the scan signals to the plurality of scan lines SL1 to SLn according to a timing sequence.

[0066] The emission driver 130 may be configured to supply emission signals to the plurality of emission control lines EL1 to ELn. According to an embodiment, the emission driver 130 may be configured to sequentially supply emission signals to the plurality of emission control lines EL1 to ELn, but the present invention is not limited thereto. The emission driver 130 may receive the emission drive signal ECS and supply emission signals to the plurality of emission control lines EL1 to ELn according to a timing sequence.

[0067] The data driver 140 may be configured to supply (apply or output) data voltages to the plurality of data lines DL1 to DLm. The data driver 140 may receive a data driving signal DCS, first image data DATA1, and second image data DATA2, and supply data voltages corresponding to the image data to the plurality of data lines DL1 to DLm according to a timing sequence.

[0068] The timing controller 150 may receive a control signal CS and first image data DATA1 from an external source (e.g., a processor). Furthermore, the timing controller 150 may receive second image data DATA2 from the grayscale converter 160. Based on the input control signal CS, the first image data DATA1, and the second image data DATA2, the timing controller 150 may output a data drive signal DCS, a scan drive signal SCS, an emission drive signal ECS, and the first image data DATA1 and the second image data DATA2. For example, the timing controller 150 may transmit the received first image data DATA1 and the second image data DATA2 to the data driver 140.

[0069] The grayscale converter 160 may receive first image data DATA1 from an external source. Furthermore, the grayscale converter 160 may receive grayscale compensation data GCD from the compensation device 200. The grayscale converter 160 may generate second image data DATA2 by reflecting the grayscale compensation data GCD in the first image data DATA1. In this case, the grayscale compensation data GCD may be a signal for controlling the grayscale value of at least one pixel PX in the display panel 110. For example, the grayscale value of at least one pixel PX in the display panel 110 driven based on the second image data DATA2 may be different from the grayscale value of at least one pixel PX in the display panel 110 driven based on the first image data DATA1.

[0070] Figure 4 is a block diagram illustrating a compensation apparatus 200 according to an embodiment. Figure 5 It shows Figure 4 A block diagram of an embodiment of the compensation controller 220 is shown.

[0071] refer to Figure 4 , the compensation device 200 may include a camera 210 , a compensation controller 220 , and a memory 230 .

[0072] The camera 210 may include an image sensor. According to an embodiment, the camera 210 may be a charge coupled device (CCD) camera. The camera 210 may capture at least one emission area EA (see Figure 1 ). Therefore, the camera 210 can generate parameter data PD for each of the emission areas EA based on the captured image. The parameter data PD may include light characteristic information of the emission area EA. According to an embodiment, the parameter data PD may include light characteristic information output from each of the pixels PX included in the emission area EA. As an example, the parameter data PD may be data regarding brightness information output from the pixels PX included in the emission area EA.

[0073] refer to Figure 4 and Figure 5 , the compensation controller 220 may include a coordinate calculator 222 and a compensation data generator 224. The compensation controller 220 may generate gray compensation data GCD based on the parameter data PD.

[0074] The coordinate calculator 222 may generate color coordinate data CCD based on the parameter data PD. The color coordinate data CCD may include information about the emission area EA (see Figure 1 ) in the color coordinates of each.

[0075] The compensation data generator 224 may receive the color coordinate data CCD and may generate grayscale compensation data GCD based on the supplied color coordinate data CCD. This will be described in detail below.

[0076] The memory 230 may be configured to be provided in the compensation device 200. However, the present invention is not limited thereto. For example, according to an embodiment, the memory 230 may be configured to be installed in the display device 100 (see FIG. Figure 1 )Inside.

[0077] The memory 230 may store the gray compensation data GCD received from the compensation controller 220. The memory 230 may be a flash memory, but is not limited thereto, as long as it can store the gray compensation data GCD.

[0078] In the following, reference will be made to Figures 6 to 16 A compensation method for a display device according to an embodiment is described.

[0079] Figure 6 is a flowchart illustrating a compensation method 600 for a display device according to an embodiment. Figure 7 It shows Figure 6 Flowchart of an implementation of step S610 of generating grayscale compensation data. Figure 8is a side view illustrating the display panel 110 and the compensation device 200 disposed at a first viewpoint VW1 . Figure 9 Is shown by Figure 8 A plan view of the display panel 110 captured by the compensation device 200. Figure 10 is a side view illustrating the display panel 110 and the compensation device 200 disposed at the second viewpoint VW2. Figure 11 Is shown by Figure 10 A plan view of the display panel 110 captured by the compensation device 200. Figure 12 : is a diagram showing values of first to third color coordinate data CCD1 to CCD3 according to the embodiment.

[0080] refer to Figure 6 , the compensation method 600 for a display device according to an embodiment may include generating grayscale compensation data in step S610 and generating image data based on the generated grayscale compensation data in step S620.

[0081] refer to Figure 7 , generating grayscale compensation data in step S610 may include photographing the first emission area of the display panel at a first viewpoint in step S611, photographing the first emission area of the display panel at a second viewpoint different from the first viewpoint in step S612, photographing the second emission area of the display panel at the first viewpoint in step S613, calculating color coordinate data of the first emission area and the second emission area in step S614, and generating grayscale compensation data based on the color coordinate data in step S615.

[0082] This specification describes an embodiment in which steps are performed sequentially according to a flowchart. However, unless the spirit of the inventive concept is changed, it is obvious that some steps shown as being performed sequentially can be performed simultaneously, the order of the steps can be changed, some steps can be omitted, or other steps can be included between the steps.

[0083] refer to Figures 6 to 9 In photographing the first emission area of the display panel at the first viewpoint in step S611, the compensation device 200 may be disposed at the first viewpoint VW1 to photograph the first emission area EA1 of the display panel 110. For example, the compensation device 200 may photograph the first emission area EA1 in a direction parallel to the third direction DR3 based on the first emission area EA1 of the display panel 110.

[0084] refer to Figure 9, the display panel 110 may include a first emission area EA1 and a second emission area EA2 different from the first emission area EA1. The first emission area EA1 may be disposed in the center of the display panel 110. The second emission area EA2 may be disposed around the first emission area EA1. For example, the second emission area EA2 may be spaced apart from the first emission area EA1 and may be disposed adjacent to a corner of the display panel 110. However, the present inventive concept is not limited thereto. In addition, according to an embodiment, a plurality of second emission areas EA2 may be provided. For example, the plurality of second emission areas EA2 may be disposed adjacent to a plurality of corners of the display panel 110.

[0085] The first emission area EA1 may include a plurality of first pixels PX1. However, the present invention is not limited thereto. For example, the first emission area EA1 may include a single first pixel PX1.

[0086] The second emission area EA2 may include a plurality of second pixels PX2. However, the present invention is not limited thereto. For example, the second emission area EA2 may include a single second pixel PX2.

[0087] Each of the first pixels PX1 may output light having the same grayscale value. In addition, each of the second pixels PX2 may output light having the same grayscale value. In an embodiment, the grayscale value (or brightness) of the light output from the first pixel PX1 may be different from the grayscale value (or brightness) of the light output from the second pixel PX2. However, embodiments of the present disclosure are not limited thereto.

[0088] refer to Figures 6 to 11 In the process of photographing the first emission area of the display panel at a second viewpoint different from the first viewpoint in step S612, the compensation device 200 may be positioned at the second viewpoint VW2 to photograph the first emission area EA1 of the display panel 110. For example, the compensation device 200 may be moved from the first viewpoint VW1 to the second viewpoint VW2 tilted at the first angle AG1. Thus, the compensation device 200 may photograph the first emission area EA1 at the second viewpoint VW2. In this case, the second viewpoint VW2 may be located at a position tilted at the first angle AG1 from the first viewpoint VW1 in a direction opposite to the first direction DR1 (or counterclockwise).

[0089] refer to Figures 6 to 9In step S613, when capturing the second emission area of the display panel at the first viewpoint, the compensation device 200 may be positioned at the first viewpoint VW1 to capture the second emission area EA2 of the display panel 110. For example, the compensation device 200 may be moved from the second viewpoint VW2 back to the first viewpoint VW1. However, the present inventive concept is not limited thereto. In other words, according to an embodiment, when capturing the first emission area of the display panel at the first viewpoint in step S611, the compensation device 200 may capture the second emission area EA2 of the display panel 110 at the first viewpoint VW1.

[0090] refer to Figures 6 to 12 In calculating the color coordinate data of the first emission area and the second emission area in step S614, the compensation device 200 may be based on the parameter data PD generated by photographing the display panel 110 (see Figure 4 ) Calculate the color coordinate data CCD of each of the first emission area EA1 and the second emission area EA2.

[0091] Coordinate calculator 222 (see Figure 5 ) The first color coordinate data CCD1 can be calculated based on the parameter data PD of the first emission area EA1 at the first viewpoint VW1. The first color coordinate data CCD1 can be the color coordinate value of the first emission area EA1 when the first emission area EA1 is photographed at the first viewpoint VW1. For example, the color coordinates can be measured based on the CIE1931 color coordinates known in the art. In the above embodiment, the first color coordinate data CCD1 can be (0.306, 0.314). However, the present inventive concept is not limited thereto.

[0092] The coordinate calculator 222 can calculate the second color coordinate data CCD2 based on the parameter data PD of the first emission area EA1 at the second viewpoint VW2. The second color coordinate data CCD2 may be the color coordinate value of the first emission area EA1 when the first emission area EA1 is photographed at the second viewpoint VW2. According to an embodiment, the second color coordinate data CCD2 may be (0.279, 0.299). However, the present invention is not limited thereto.

[0093] The coordinate calculator 222 can calculate the third color coordinate data CCD3 based on the parameter data PD of the second emission area EA2 at the first viewpoint VW1. The third color coordinate data CCD3 may be the color coordinate value of the second emission area EA2 when the second emission area EA2 is photographed at the first viewpoint VW1. According to an embodiment, the third color coordinate data CCD3 may be (0.305, 0.314). However, the present invention is not limited thereto.

[0094] refer to Figures 6 to 12In generating grayscale compensation data based on the color coordinate data in step S615, the compensation data generator 224 (see Figure 5 ) can subtract the second color coordinate data CCD2 from the first color coordinate data CCD1. In addition, the compensation data generator 224 can add the value obtained by the subtraction to the third color coordinate data CCD3 and generate the first grayscale compensation data GCD1 based on the value obtained by the addition (for example, see Figure 15 ). In this case, the first grayscale compensation data GCD1 may be data regarding the color coordinate value of the second emission area EA2 when observed from the second viewpoint VW2. That is, the color coordinate value of the second emission area EA2 driven based on the first grayscale compensation data GCD1 may be the same as the value derived through the above-mentioned calculation process. According to the above-mentioned embodiment, the color coordinate value of the second emission area EA2 controlled according to the first grayscale compensation data GCD1 may be (0.332, 0.329). However, the inventive concept is not limited thereto.

[0095] refer to Figures 6 to 11 In generating image data based on the generated grayscale compensation data in step S620, the grayscale converter 160 (see Figure 2 ) can generate the second image data DATA2 by reflecting the first grayscale compensation data GCD1 (see Figure 2 For example, the grayscale converter 160 may reflect the first grayscale compensation data GCD1 to the first image data DATA1 (see Figure 2 ) to generate the second image data DATA2. In this case, the grayscale value of the light output from the second pixel PX2 driven by the second image data DATA2 may be a compensated grayscale value. In other words, the grayscale value of the second pixel PX2 when viewed from the second viewpoint VW2 may be the same as the grayscale value of the second pixel PX2 when viewed from the first viewpoint VW1.

[0096] According to a comparative example, the grayscale value of the second pixel PX2 when viewed from the first viewpoint VW1 may be different from the grayscale value of the second pixel PX2 when viewed from the second viewpoint VW2. For example, the display panel 110 may be composed of a plurality of layers. The light output from the second pixel PX2 may pass through the plurality of layers and pass through the display device 100 (see FIG. Figure 1) is output from the upper surface of the display device 100. In this case, a phenomenon in which the lights output from the display device 100 interfere with each other may occur. Therefore, the image visually recognized by the user of the display device 100 may change based on the angle from which the display device 100 is observed. For example, the grayscale value of the light output from the second pixel PX2 and observed at the first viewpoint VW1 may be different from the grayscale value of the light output from the second pixel PX2 and observed at the second viewpoint VW2. Therefore, the image output from the display device 100 may be visually recognized differently by the user of the display device 100 according to the multiple viewpoints VW, and the quality of the image visually recognized by the user of the display device 100 may also deteriorate.

[0097] However, according to an embodiment, the image output from the display device 100 can be visually recognized similarly by the user of the display device 100 at the first viewpoint VW1 and the second viewpoint VW2. In other words, the image output from the display device 100 can be visually recognized relatively uniformly by the user of the display device 100 at the plurality of viewpoints VW, and the display device 100 can output an image with improved quality.

[0098] Figure 13 is a side view illustrating the display panel 110 and the compensation device 200 disposed at a third viewpoint VW3 . Figure 14 is a side view illustrating the display panel 110 and the compensation device 200 disposed at a fourth viewpoint VW4. Figure 15 is a diagram illustrating a lookup table 1500 stored in a memory according to an embodiment.

[0099] refer to Figures 6 to 13 Generating grayscale compensation data in step S610 may further include photographing the first emission area EA1 at a third viewpoint VW3 using the compensation device 200. For example, the compensation device 200 may be disposed at a third viewpoint VW3 that is tilted from the first viewpoint VW1 at a second angle AG2 greater than the first angle AG1 to photograph the first emission area EA1. In this case, the third viewpoint VW3 may be located at a position that is tilted from the first viewpoint VW1 at the second angle AG2 in a direction opposite to the first direction DR1 (e.g., counterclockwise).

[0100] refer to Figures 7 to 13 In calculating the color coordinate data of the first emission area and the second emission area in step S614, the compensation device 200 may be based on the parameter data PD generated by shooting at the third viewpoint VW3 (see Figure 4 ) to calculate the fourth color coordinate data of the first emission area EA1. The fourth color coordinate data described above may be the color coordinate value of the first emission area EA1 when the first emission area EA1 is photographed at the third viewpoint VW3.

[0101] refer to Figures 7 to 14 In generating grayscale compensation data based on the color coordinate data in step S615, the compensation data generator 224 (see Figure 5 ) can subtract the fourth color coordinate data from the first color coordinate data CCD1. In addition, the compensation data generator 224 can add the value obtained by subtraction to the third color coordinate data CCD3 and generate the second grayscale compensation data GCD2 based on the value obtained by addition (for example, referring to Figure 15 ). In this case, the second grayscale compensation data GCD2 may be data regarding the color coordinate value of the second emission area EA2 when viewed from the third viewpoint VW3. That is, the color coordinate value of the second emission area EA2 driven based on the second grayscale compensation data GCD2 may be the same as the value derived through the above calculation process.

[0102] refer to Figures 6 to 14 According to an embodiment, when generating grayscale compensation data in step S610, the compensation device 200 may be positioned at the fourth viewpoint VW4 to capture the first emission area EA1. For example, the compensation device 200 may be positioned at the fourth viewpoint VW4 tilted at the third angle AG3 from the first viewpoint VW1 to capture the first emission area EA1. In this case, the fourth viewpoint VW4 may be located at a position tilted at the third angle AG3 from the first viewpoint VW1 to the third viewpoint VW3 in a direction opposite to the second direction DR2.

[0103] refer to Figures 7 to 14 In calculating the color coordinate data of the first emission area and the second emission area in step S614, the compensation device 200 may be based on the parameter data PD generated by shooting at the fourth viewpoint VW4 (see Figure 4 ) to calculate the fifth color coordinate data of the first emission area EA1. The fifth color coordinate data described above may be the color coordinate value of the first emission area EA1 when the first emission area EA1 is photographed at the fourth viewpoint VW4.

[0104] refer to Figures 7 to 14 In generating grayscale compensation data based on the color coordinate data in step S615, the compensation data generator 224 (see Figure 5 ) can subtract the fifth color coordinate data from the first color coordinate data CCD1. In addition, the compensation data generator 224 can add the value obtained by the subtraction to the third color coordinate data CCD3 and generate the third grayscale compensation data GCD3 based on the value obtained by the addition (for example, see Figure 15). In this case, the third grayscale compensation data GCD3 may be data on the color coordinate value of the second emission area EA2 when viewed from the fourth viewpoint VW4. That is, the color coordinate value of the second emission area EA2 driven based on the third grayscale compensation data GCD3 may be the same as the value derived through the above calculation process.

[0105] refer to Figures 13 to 15 , the compensation device 200 may store grayscale compensation data GCD corresponding to each of the plurality of viewpoints VW. For example, the memory 230 (see Figure 4 ) can be stored in the form of a lookup table 1500 by the compensation controller 220 (see Figure 4 ) generated by the lookup table 1500. For example, the lookup table 1500 may include first to (k-1)th grayscale compensation data GCDk-1 corresponding to (or associated with) the second to k-th viewpoints VW2 to VWk (k may be an integer greater than or equal to 1). According to an embodiment, the first grayscale compensation data GCD1 may correspond to the second viewpoint VW2, and the second grayscale compensation data GCD2 may correspond to the third viewpoint VW3.

[0106] Figure 16 is a diagram showing grayscale compensation data corresponding to each of a plurality of viewpoints.

[0107] refer to Figure 7 and Figures 13 to 16 In generating the grayscale compensation data based on the color coordinate data in step S615, the compensation device 200 may interpolate the first grayscale compensation data GCD1 and the second grayscale compensation data GCD2 to generate grayscale compensation data GCD corresponding to at least one viewpoint between the second viewpoint VW2 and the third viewpoint VW3. For example, the i-th viewpoint VWi may be any one of the viewpoints VW existing between the second viewpoint VW2 and the third viewpoint VW3. In other words, the i-th viewpoint VWi may be one of the viewpoints VW tilted from the first viewpoint VW1 at an angle greater than the first angle AG1 and less than the second angle AG2. In this case, the compensation data generator 224 (see Figure 5 ) may interpolate the first grayscale compensation data GCD1 and the second grayscale compensation data GCD2 to generate an (i-1)th grayscale compensation data GCDi-1 corresponding to the i-th viewpoint VWi.

[0108] Figure 17 is a block diagram illustrating a compensation system 1700 of the display device 100 according to an embodiment.

[0109] refer to Figure 17 , the compensation system 1700 of the display device 100 may include the display device 100 and the compensation device 200 .

[0110] The display device 100 may include a display panel 110 , a scan driver 120 , an emission driver 130 , a data driver 140 , a timing controller 150 , a grayscale converter 160 , and a visual sensor 170 . Figure 17 The display panel 110, the scan driver 120, the emission driver 130, the data driver 140, the timing controller 150, the grayscale converter 160 and the compensation device 200 can be described as Figure 2 The display panel 110, the scan driver 120, the emission driver 130, the data driver 140, the timing controller 150, the grayscale converter 160, and the compensation device 200 are similar. Hereinafter, repeated descriptions will be omitted.

[0111] The visual sensor 170 can sense the user's eyes on the display device 100. For example, the visual sensor 170 may include a camera that captures the user's eyes on the display device 100. The visual sensor 170 may acquire an image corresponding to the captured user's eyes. The visual sensor 170 may generate visual sensing data VSD based on the acquired image. The visual sensing data VSD may be transmitted to the grayscale converter 160. The visual sensing data VSD may include information about the distance between the user's eyes and the display panel 110 in the display device 100. For example, the visual sensing data VSD may include information about the user's viewing angle of the display device 100.

[0112] The grayscale converter 160 may receive the visual sensing data VSD from the visual sensor 170. The grayscale converter 160 may generate the second image data DATA2 based on the grayscale compensation data GCD and the visual sensing data VSD. For example, the grayscale converter 160 may generate the second image data DATA2 by reflecting the viewpoint VW (see FIG. 1 ) corresponding to the viewing angle of the user of the display device 100. Figure 15 ) to generate the second image data DATA2. Therefore, the display device 100 can output light in which the grayscale value of the pixel PX is compensated according to the viewing angle of the display device 100.

[0113] According to the compensation system for a display device and the compensation method for a display device according to an embodiment, an image that a user of the display device can visually recognize relatively uniformly at a plurality of viewpoints may be output.

[0114] Effects according to the embodiments are not limited to those described above, and various other effects are included in this specification.

[0115] Although specific embodiments and applications have been described herein, other embodiments and variations can be derived from the above description. Therefore, the spirit of the inventive concept is not limited to these embodiments, but extends to the scope of the appended claims, various obvious modifications and equivalents.

Claims

1. A compensation system for a display device, comprising: a display panel comprising a first emission area and a second emission area different from the first emission area, each of the first emission area and the second emission area comprising one or more pixels; a camera configured to capture the display panel at one or more viewpoints; as well as a compensation controller that calculates color coordinate data of the first emission area and the second emission area and generates grayscale compensation data based on the color coordinate data, The grayscale compensation data is used to control the grayscale value of the one or more pixels included in the second emission area.

2. The compensation system according to claim 1, wherein: The one or more viewpoints include: First viewpoint; and a second viewpoint, tilted at a first angle from the first viewpoint, and Wherein, the compensation controller includes: Coordinate calculator, The coordinate calculator is configured to calculate the first color coordinate data of the first emission area corresponding to the first viewpoint, calculate the second color coordinate data of the first emission area corresponding to the second viewpoint, and calculate the third color coordinate data of the second emission area corresponding to the first viewpoint.

3. The compensation system according to claim 2, wherein: The compensation controller further includes: Compensation data generator, The compensation data generator generates the first grayscale compensation data by adding a value obtained by subtracting the second color coordinate data from the first color coordinate data to the third color coordinate data.

4. The compensation system according to claim 3, wherein: The one or more viewpoints also include: a third viewpoint, tilted from the first viewpoint at a second angle greater than the first angle, wherein the coordinate calculator calculates fourth color coordinate data of the first emission area corresponding to the third viewpoint, and The compensation data generator generates the second grayscale compensation data by adding a value obtained by subtracting the fourth color coordinate data from the first color coordinate data to the third color coordinate data.

5. The compensation system according to claim 4, wherein: the first grayscale compensation data includes information on grayscale values of the one or more pixels located in the second emission area corresponding to the second viewpoint, and The second grayscale compensation data includes information about grayscale values of the one or more pixels located in the second emission area corresponding to the third viewpoint.

6. The compensation system according to claim 5, wherein: The compensation data generator interpolates the first grayscale compensation data and the second grayscale compensation data to generate the grayscale compensation data corresponding to at least one viewpoint existing between the second viewpoint and the third viewpoint.

7. The compensation system according to claim 1, further comprising: a memory for storing the grayscale compensation data, The memory stores the grayscale compensation data in the form of a lookup table so as to correspond to each of the one or more viewpoints.

8. The compensation system according to claim 1, further comprising: a visual sensor that senses the user's eyes on the display device and generates visual sensing data; as well as A grayscale converter generates image data based on the grayscale compensation data and the visual sensing data.

9. The compensation system according to claim 8, wherein: The visual sensing data includes information about a position between the user's eyes and the display panel.

10. The compensation system according to claim 1, wherein: The first emission area is arranged at the center of the display panel, and Wherein, the second emission area is arranged around the first emission area.

11. A compensation method for a display device, comprising: photographing a first emission area of the display panel at a first viewpoint; photographing the first emission area of the display panel at a second viewpoint tilted from the first viewpoint at a first angle; photographing a second emission area of the display panel at the first viewpoint, where the second emission area is different from the first emission area; Calculating color coordinate data of the first emission area and the second emission area; as well as generating grayscale compensation data based on the color coordinate data, The grayscale compensation data is used to control the grayscale value of one or more pixels included in the second emission area.

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