Display device

Abstract

A display device is provided. The display device includes a plurality of pixels including a light emitting element, a weight calculation unit configured to calculate a weight of one of the plurality of pixels based on an amount of current flowing through the one of the plurality of pixels and a number of the light emitting element of the one of the plurality of pixels, a degradation accumulation unit configured to accumulate a degradation amount of the one of the plurality of pixels based on the weight of the one of the plurality of pixels and previous compensation data, and a data compensation unit configured to generate compensation data to be supplied to the one of the plurality of pixels based on the degradation amount of the one of the plurality of pixels.

Description

TECHNICAL FIELD

[0001] The disclosure relates to a display apparatus. BACKGROUND

[0002] A display apparatus can include a plurality of light emitting elements. The plurality of light emitting elements can have properties that cause them to deteriorate when they are used and when they emit heat. The display apparatus can measure an amount of deterioration of each of the plurality of pixels and can generate compensation data for the plurality of pixels. In this case, if the amount of deterioration of each of the pixels cannot be accurately measured, a ghosting compensation error can occur and the plurality of pixels can not be properly compensated. SUMMARY

[0003] TECHNICAL PROBLEM

[0004] Aspects of the disclosure provide a display apparatus capable of improving the performance of ghosting compensation by more accurately calculating an amount of deterioration of each of a plurality of pixels.

[0005] However, aspects of the disclosure are not limited to the aspects set forth herein. The above and other aspects of the disclosure will become more apparent by describing in detail the disclosure given below.

[0006] TECHNICAL SOLUTION

[0007] According to some embodiments of the disclosure, a display apparatus includes a plurality of pixels including a light emitting element, a weight calculation unit configured to calculate a weight of one pixel of the plurality of pixels based on an amount of current flowing through the one pixel and a number of the light emitting element of the one pixel, a deterioration accumulation unit configured to accumulate an amount of deterioration of the one pixel of the plurality of pixels based on the weight of the one pixel and previous compensation data, and a data compensation unit configured to generate compensation data to be supplied to the one pixel of the plurality of pixels based on the amount of deterioration of the one pixel.

[0008] At least some of the plurality of pixels can have different numbers of the light emitting element.

[0009] The weight calculated by the weight calculation unit can become higher as the amount of the current flowing is greater or as the number of the light emitting element is smaller.

[0010] The deterioration accumulation unit can be further configured to accumulate a current amount of deterioration of the one pixel of the plurality of pixels by multiplying a current frame age of the one pixel of the plurality of pixels and the weight of the one pixel and accumulating the previous amount of deterioration of the one pixel.

[0011] The amount of deterioration calculated by the deterioration accumulation unit can increase as the weight becomes higher or as the previous compensation data becomes greater.

[0012] The data compensation unit can be further configured to generate the compensation data by applying the amount of degradation to a preset lookup table.

[0013] The weight calculation unit can be further configured to calculate the weight of the pixel group based on an amount of current flowing through the pixel group including some of the plurality of pixels and a number of light emitting elements in the pixel group.

[0014] The display apparatus can further include a display area having the plurality of pixels, and a non-display area surrounding the display area, wherein the pixel groups correspond to respective points in the display area.

[0015] The weight calculation unit can be further configured to calculate a weight of a pixel block including the pixel groups based on an amount of current flowing through the pixel groups and a number of light emitting elements in the pixel groups, wherein each of the pixel groups has some of the plurality of pixels.

[0016] The plurality of pixels can further include a pixel circuit connected to the data line, the gate line, and the driving voltage line, wherein the light emitting element is connected between an output node of the pixel circuit and the low potential line.

[0017] The degradation accumulation unit can include an age calculation module configured to calculate an age of one of the plurality of pixels based on previous compensation data of the one of the plurality of pixels, and a degradation accumulation module configured to accumulate the amount of degradation of the one of the plurality of pixels based on the weight and the age of the one of the plurality of pixels.

[0018] The weight calculation unit can be further configured to calculate the weight of the pixel group based on an amount of current flowing through the pixel group including some of the plurality of pixels and a number of light emitting elements in the pixel group.

[0019] The degradation accumulation module can be further configured to accumulate the amount of degradation of the pixel group by applying the weight of the pixel group to the age of the pixel group.

[0020] The weight calculation unit can be further configured to calculate a weight of a pixel block including the pixel groups based on an amount of current flowing through the pixel groups and a number of light emitting elements in the pixel groups, wherein each of the pixel groups has some of the plurality of pixels.

[0021] The degradation accumulation module can be further configured to accumulate the amount of degradation of the pixel block by applying the weight of the pixel block to the age of the pixel block.

[0022] The degradation accumulation unit can include an age calculation module configured to calculate an age of one of the plurality of pixels based on previous compensation data of the one of the plurality of pixels and based on a first weight as a part of the weight, and a degradation accumulation module configured to accumulate the amount of degradation of the one of the plurality of pixels based on a second weight as another part of the weight and based on the age of the one of the plurality of pixels.

[0023] The weight calculation unit can be further configured to calculate the first weight and the second weight of the pixel group based on an amount of current flowing through the pixel group including some of the plurality of pixels and based on a number of light emitting elements in the pixel group.

[0024] The age calculation module can be further configured to calculate an age of the pixel group based on the first weight of the pixel group and based on previous compensation data of the pixel group, and the degradation accumulation module is further configured to accumulate an amount of degradation of the pixel group by applying the second weight of the pixel group to the age of the pixel group.

[0025] The weight calculation unit can be further configured to calculate the first weight and the second weight of a pixel block including the pixel group based on an amount of current flowing through the pixel group and based on a number of light emitting elements in the pixel group, wherein each pixel group has some of the plurality of pixels.

[0026] The age calculation module can be further configured to calculate an age of the pixel block based on the first weight of the pixel block and based on previous compensation data of the pixel block, and the degradation accumulation module is further configured to accumulate an amount of degradation of the pixel block by applying the second weight of the pixel block to the age of the pixel block.

[0027] Details of other implementations are included in the detailed description and the accompanying drawings.

[0028] Advantages

[0029] According to the display apparatus according to some of the embodiments, when at least some of the pixels have different numbers of light emitting elements, the display apparatus calculates a weight and an amount of degradation of the pixel based on an amount of current flowing through the pixel and based on a number of light emitting elements of the pixel. Accordingly, the amount of degradation of the pixel can be more accurately calculated, and the afterimage compensation performance of the display apparatus can be improved.

[0030] Effects of the present disclosure are not limited to the aforementioned effects, and various other effects include those described in the specification. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 is a plan view illustrating a display apparatus according to some embodiments.

[0032] Figure 2 is a block diagram illustrating a display apparatus according to some embodiments.

[0033] Figure 3 is a diagram illustrating a pixel of a display apparatus according to some embodiments.

[0034] Figure 4 is a diagram illustrating an example of a plurality of light emitting elements in a display apparatus according to some embodiments.

[0035] Figure 5This is a diagram illustrating another example of multiple light-emitting elements in a display device according to some embodiments.

[0036] Figure 6 This is a plan view showing pixel groups and pixel blocks in a display device according to some embodiments.

[0037] Figure 7 This is a block diagram illustrating a timing controller for a display device according to some embodiments.

[0038] Figure 8 It is a graph showing the relationship between the amount of degradation and compensation data in a display device according to some embodiments.

[0039] Figure 9 This is a flowchart illustrating an example of a process for generating compensation data in a display device according to some embodiments.

[0040] Figure 10 This is a flowchart illustrating another example of a process for generating compensation data in a display device according to some implementations.

[0041] Figure 11 This is a flowchart illustrating yet another example of a process for generating compensation data in a display device according to some embodiments.

[0042] Figure 12 This is a block diagram illustrating a timing controller for a display device according to some other embodiments.

[0043] Figure 13 This is a flowchart illustrating an example of a process for generating compensation data in a display device according to some other embodiments.

[0044] Figure 14 This is a flowchart illustrating another example of a process for generating compensation data in a display device according to some other embodiments.

[0045] Figure 15 This is a flowchart illustrating yet another example of a process for generating compensation data in a display device according to some other embodiments.

[0046] Figure 16 This is a block diagram illustrating a timing controller for a display device according to yet another embodiment.

[0047] Figure 17 This is a flowchart illustrating an example of a process for generating compensation data in a display device according to yet another embodiment.

[0048] Figure 18 This is a flowchart illustrating another example of the process of generating compensation data in a display device according to yet another implementation.

[0049] Figure 19 FIG. 11 is a flowchart illustrating another example of a process of generating compensation data in a display device according to still other embodiments. DETAILED DESCRIPTION

[0050] The present disclosure will now be described more fully with reference to the accompanying drawings, in which preferred embodiments of the present disclosure are shown. The present disclosure may, however, be embodied in different forms, and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the present disclosure to those skilled in the art.

[0051] Although the terms "first," "second," and the like can be used herein to describe various types of elements, these elements should not be construed as being limited to the terms "first," "second," etc. The terms are used to distinguish one element from another. Thus, a first element discussed below could be termed a second element without departing from the teachings of the present disclosure.

[0052] Various embodiments are described herein with reference to cross-sectional and / or exploded illustrations that are schematic and / or idealized representations of embodiments and intermediate structures of the present disclosure. As such, variations from the shapes of the illustrations as a result, for example, of manufacturing techniques and / or tolerances, are to be expected. Thus, embodiments disclosed herein should not necessarily be construed as limited to the particular shapes of regions as illustrated herein but are to include deviations in shapes that result, for example, from manufacturing. In this manner, regions illustrated in the figures can be schematic in nature and the shapes of the regions as illustrated in the figures can not reflect actual shapes of regions of devices and, as such, are intended to be exemplary rather than a limiting.

[0053] Embodiments will hereinafter be described with reference to the drawings.

[0054] Figure 1 FIG. 1 is a plan view illustrating a display device according to some embodiments. Figure 2 FIG. 2 is a block diagram illustrating a display device according to some embodiments.

[0055] Reference Figure 1 and Figure 2 The display device, as a device for displaying a moving image or a still image, can be used as a display screen of various products such as a television, a laptop computer, a monitor, a billboard, and an Internet of Things (IoT) device, and portable electronic devices such as a mobile phone, a smart phone, a tablet Personal Computer (PC), a smart watch, a watch phone, a mobile communication terminal, an electronic notebook, an electronic book reader, a Portable Multimedia Player (PMP), a navigation device, and an Ultra Mobile PC (UMPC).

[0056] The display apparatus can include a display panel 100, a timing controller 200, a data driver 300, a power supply unit 400, and a scan driver 500.

[0057] The display panel 100 can have a rectangular shape in a plan view (or when viewed in a thickness direction (Z-axis direction)). For example, the display panel 100 can have a rectangular shape having a long side in a first direction (X-axis direction) and a short side in a second direction (Y-axis direction) in a plan view. Corners formed by the long side in the first direction (X-axis direction) and the short side in the second direction (Y-axis direction) can be right-angled or can be rounded (e.g., rounded to have a predetermined curvature). The planar shape of the display panel 100 is not limited to a rectangular shape, and can be formed into another polygonal shape, a circular shape, or an elliptical shape. For example, the display panel 100 can be formed to be flat, but is not limited thereto. In another example, the display panel 100 can be curved (e.g., curved to have a predetermined curvature).

[0058] The display panel 100 can include a display area DA and a non-display area NDA.

[0059] The display area DA, which is an area for displaying an image, can be defined as a central area of the display panel 100. The display area DA can include a plurality of pixels SP formed in a pixel area defined by a plurality of data lines DL and a plurality of scan lines SL, which cross each other, respectively. Each of the plurality of pixels SP can be connected to at least one scan line SL, data line DL, and driving voltage line VDDL. Each of the plurality of pixels SP can be defined as an area of a minimum unit of outputting light.

[0060] The plurality of data lines DL can include first to m-th data lines DL1 to DLm (m is a natural number of 2 or more). The first to m-th data lines DL1 to DLm can extend in the second direction (Y-axis direction) while being spaced apart from each other in the first direction (X-axis direction). For example, each of the first to m-th data lines DL1 to DLm can be connected to a plurality of pixels SP arranged along first to m-th columns.

[0061] The plurality of scan lines SL can include first to n-th scan lines SL1 to SLn (n is a natural number of 2 or more). The first to n-th scan lines SL1 to SLn can extend in the first direction (X-axis direction) while being spaced apart from each other in the second direction (Y-axis direction). For example, each of the first to n-th scan lines SL1 to SLn can be connected to a plurality of pixels SP arranged along first to n-th rows.

[0062] The non-display area NDA can be defined as a remaining area of the display panel 100 except for the display area DA. For example, the non-display area NDA can include a scan driver 500 for applying a scan signal to the scan lines SL, fan-out lines connecting the data lines DL to the data driver 300, and a pad portion connected to the ductile film 610.

[0063] The timing controller 200 can be mounted on the circuit board 620 and can receive the pixel data PDATA and the timing synchronization signal supplied from the display driving system through a user connector located on the circuit board 620. The timing controller 200 can receive the weight information WI supplied from the weight measuring system. Here, when the plurality of pixels SP exhibit the same brightness, the weight information WI can include the amount of current flowing through each of the pixels SP and the number of light emitting elements EL (see FIG. 1) of each of the pixels SP. In addition, the weight information WI can further include the brightness of the plurality of pixels SP, the temperature depending on the positions of the plurality of pixels SP, and the light emission period and the light emission frequency of the plurality of pixels SP, but is not limited thereto. The timing controller 200 can calculate the weight of each of the pixels SP based on the weight information WI and can accumulate the amount of degradation of each of the pixels SP. The timing controller 200 can generate compensation data CADATA by applying the amount of degradation of each of the pixels SP to the pixel data PDATA and can provide the compensation data CADATA adjusted to the arrangement structure of the pixels SP to the data driver 300. Figure 3 ) of each of the pixels SP. In addition, the weight information WI can further include the brightness of the plurality of pixels SP, the temperature depending on the positions of the plurality of pixels SP, and the light emission period and the light emission frequency of the plurality of pixels SP, but is not limited thereto. The timing controller 200 can calculate the weight of each of the pixels SP based on the weight information WI and can accumulate the amount of degradation of each of the pixels SP. The timing controller 200 can generate compensation data CADATA by applying the amount of degradation of each of the pixels SP to the pixel data PDATA and can provide the compensation data CADATA adjusted to the arrangement structure of the pixels SP to the data driver 300.

[0064] The timing controller 200 can generate a data control signal DCS and a scan control signal SCS based on the timing synchronization signal. The timing controller 200 can control the driving timing of the data driver 300 using the data control signal DCS and the driving timing of the scan driver 500 using the scan control signal SCS.

[0065] The data driver 300 can be located on the ductile film 610 and can be connected to the pad portion located in the non-display area NDA of the display panel 100. For example, the data driver 300 can be implemented as an integrated circuit (IC). The data driver 300 can receive the compensation data CADATA and the data control signal DCS from the timing controller 200. The data driver 300 can generate a data voltage based on the compensation data CADATA and can supply the data voltage to the data lines DL based on the data control signal DCS. The data voltage can be supplied to the plurality of pixels SP through the data lines DL to determine the brightness of the plurality of pixels SP.

[0066] The power supply unit 400 can be located on the circuit board 620 to supply a driving voltage to the data driver 300 and the display panel 100. The power supply unit 400 can generate a driving voltage and can supply the driving voltage to a plurality of pixels SP arranged in the display panel 100 through a driving voltage line VDDL. The power supply unit 400 can generate a common voltage and can supply the common voltage to a low potential line of the display panel 100. For example, the driving voltage can correspond to a high potential voltage capable of driving the plurality of pixels SP, and the common voltage can correspond to a low potential voltage commonly supplied to the plurality of pixels SP.

[0067] The scan driver 500 can be located in the non-display area NDA of the display panel 100. For example, the scan driver 500 can be located on one side of the non-display area NDA of the display panel 100, or can be located on the other side opposite to the one side. In another example, the scan driver 500 can be located on both sides (e.g., right and left sides) of the non-display area NDA of the display panel 100. The scan driver 500 can generate scan signals based on a scan control signal SCS supplied from the timing controller 200 and can supply the scan signals to the plurality of scan lines SL in turn (e.g., in a set order).

[0068] The ductile film 610 can have the data driver 300 mounted thereon and can connect the circuit board 620 to the pad portion of the display panel 100. Input terminals located on one side of the ductile film 610 can be attached to the circuit board 620 through a film bonding process, and output terminals located on the other side of the ductile film 610 can be attached to the pad portion of the display panel 100 through a film bonding process. For example, the ductile film 610 can be a flexible film that can be bent, such as a tape carrier package or a chip on film. For example, the ductile film 610 can be bent toward a lower portion of the display panel 100 to reduce a bezel area of the display device, but embodiments are not limited thereto.

[0069] The circuit board 620 can support the timing controller 200 and the power supply unit 400 and can supply various signals and power to the data driver 300. For example, the circuit board 620 can supply signals supplied from the timing controller 200 and a driving voltage supplied from the power supply unit 400 to the data driver 300 and the scan driver 500 to display an image on each pixel. To this end, a signal transmission line and a plurality of power supply lines can be located on the circuit board 620.

[0070] Figure 3 FIG. 1 is a diagram illustrating a pixel of a display device according to some embodiments. Figure 4 FIG. 2 is a diagram illustrating an example of a plurality of light emitting elements in a display device according to some embodiments. Figure 5FIG. 1 is a diagram illustrating another example of a plurality of light emitting elements in a display device according to some embodiments.

[0071] Referring to Figure 3 to Figure 5 Each of the pixels SP can include a pixel circuit PC and a plurality of light emitting elements EL. The pixel circuit PC can be connected to a data line DL, at least one scan line SL, and a driving voltage line VDDL. The pixel circuit PC can include at least one switching element. The at least one switching element of the pixel circuit PC can include a driving transistor. The driving transistor can control a driving current ID or a source-drain current based on a data voltage applied to a gate electrode. The driving current ID can flow through a channel of the driving transistor and can be output through an output node OUT of the pixel circuit PC. The driving current ID can be supplied to first electrodes of the plurality of light emitting elements EL and can be distributed to the plurality of light emitting elements EL.

[0072] The plurality of light emitting elements EL can be connected between the output node OUT of the pixel circuit PC and a low potential line VSSL. For example, the light emitting element EL can be an inorganic light emitting diode including an inorganic material, but is not limited thereto. The light emitting element EL can have a micro size or a nano size. The plurality of light emitting elements EL can be aligned between two electrodes facing each other by an electric field formed in a corresponding direction between the two electrodes.

[0073] At least some of the plurality of pixels SP can have different numbers of light emitting elements EL. In a process of aligning the plurality of light emitting elements EL by an electric field formed between two electrodes, at least some of the pixels SP can have different numbers of light emitting elements EL normally aligned. The plurality of light emitting elements EL normally aligned can receive a driving current ID and can emit light. Each of the plurality of pixels SP can include a first light emitting element EL1 to a k-th light emitting element ELk (k is a natural number of 2 or more). For example, the plurality of pixels SP can include a first pixel SP1 and a second pixel SP2.

[0074] In Figure 4 , the first pixel SP1 can include a first light emitting element EL1 and a second light emitting element EL2. The driving current ID output from the output node OUT of the pixel circuit PC can be supplied to the first electrodes of the plurality of light emitting elements EL and can be distributed to and flow through the first light emitting element EL1 and the second light emitting element EL2. Accordingly, each of the first light emitting element EL1 and the second light emitting element EL2 can emit light by 1 / 2 of the driving current ID.

[0075] In Figure 5In the second pixel SP2, the first light emitting element EL1, the second light emitting element EL2, and the third light emitting element EL3 can be arranged in a 2x2 matrix form. The driving current ID output from the output node OUT of the pixel circuit PC can be supplied to the first electrodes of the plurality of light emitting elements EL, and can be distributed to and flow through the first light emitting element EL1, the second light emitting element EL2, and the third light emitting element EL3. Accordingly, each of the first light emitting element EL1, the second light emitting element EL2, and the third light emitting element EL3 can emit light by 1 / 3 of the driving current ID.

[0076] When the light emitting element EL emits light by the driving current ID, the light emitting element EL can deteriorate. The amount of deterioration of the light emitting element EL can be determined by the size of the driving current ID flowing through the light emitting element EL, the light emission time, or the age of the light emitting element EL. For example, the amount of deterioration of the light emitting element EL can increase as the size of the driving current ID flowing through the light emitting element EL increases, as the light emission time of the light emitting element EL increases, and / or as the age of the light emitting element EL increases. Because the first pixel SP1 and the second pixel SP2 have different numbers of light emitting elements EL, the size of the current flowing through one light emitting element EL, the light emission time, and / or the age of the light emitting element EL can be different. Accordingly, the amount of deterioration of the plurality of light emitting elements EL of each of the first pixel SP1 and the second pixel SP2 can be different.

[0077] Figure 6 is a plan view illustrating a pixel group and a pixel block in a display device according to some embodiments.

[0078] Reference Figure 6 The display area DA can include a plurality of pixels SP. The display area DA can include a plurality of pixel groups PG each including some of the plurality of pixels SP. For example, each pixel group PG can correspond to a group of pixels SP arranged along a respective row and column. The plurality of pixel groups PG can include a first-first pixel group PG11, a first-second pixel group PG12, a second-first pixel group PG21, and a second-second pixel group PG22. Each of the first-first pixel group PG11, the first-second pixel group PG12, the second-first pixel group PG21, and the second-second pixel group PG22 can include pixels in a 2x2 matrix form (pixels in a 2 by 2 matrix form). However, the arrangement of the pixels SP in the pixel group PG is not limited thereto. Each of the plurality of pixel groups PG can correspond to a respective point in the display area DA. Accordingly, the pixel group PG can correspond to a group of pixels SP arranged at a respective point in the display area DA.

[0079] For example, the display area DA can include a plurality of pixel blocks PB each including a plurality of pixel groups PG. The plurality of pixel blocks PB can include a first-first pixel block PB11 and a second-first pixel block PB21. The first-first pixel block PB11 can include a first-first pixel group PG11 and a first-second pixel group PG12. The second-first pixel block PB21 can include a second-first pixel group PG21 and a second-second pixel group PG22. Each of the plurality of pixel blocks PB can include a pixel group PG in a 1x2 matrix form and a pixel SP in a 2x4 matrix form. However, the arrangement of the pixel groups PG or the pixels SP in the pixel blocks PB is not limited thereto. Accordingly, the pixel blocks PB can correspond to a group of pixel groups PG corresponding to a corresponding point in the display area DA.

[0080] In another example, each of the pixel blocks PB can include a pixel group in a 3x3 matrix form (a 3 by 3 matrix form). In this case, the pixel blocks PB can correspond to a group of pixels SP greater in number than the pixel groups PG, but can not correspond to a group of pixel groups PG.

[0081] Figure 7 is a block diagram illustrating a timing controller of a display apparatus according to some embodiments. Figure 8 is a graph illustrating a relationship between a deterioration amount and compensation data in a display apparatus according to some embodiments.

[0082] Referring to Figure 7 The timing controller 200 can include a weight calculation unit 210, a deterioration accumulation unit 220, and a data compensation unit 230.

[0083] The weight calculation unit 210 can calculate the weight WT of each of the pixels SP based on the weight information WI. When the plurality of pixels SP exhibit the same luminance, the weight information WI can include the amount of current flowing through each of the pixels SP or the number of light emitting elements EL of each of the pixels SP. Here, the amount of current flowing through each of the pixels SP can correspond to the size of the drive current ID flowing through the output node OUT of the pixel circuit PC, or can correspond to the size of the drive current ID supplied to the first electrode of the plurality of light emitting elements EL. Also, the weight information WI can further include the luminance of the plurality of pixels SP, the temperature depending on the position of the plurality of pixels SP, and / or the light emission period and / or the light emission frequency of the plurality of pixels SP, but is not limited thereto. The weight calculation unit 210 can calculate the size of the current flowing through one light emitting element EL of the corresponding pixel SP based on the amount of current flowing through the pixel SP and the number of light emitting elements EL of the pixel SP. Accordingly, the weight calculation unit 210 can calculate the weight WT of the corresponding pixel SP in consideration of the size of the current flowing through each of the light emitting elements EL of the pixel SP. For example, as the amount of current flowing through the pixel SP increases or as the number of light emitting elements EL decreases, the weight WT calculated by the weight calculation unit 210 can become higher, but is not limited thereto. The weight calculation unit 210 can supply the weight WT of each of the pixels SP to the degradation accumulation unit 220.

[0084] The degradation accumulation unit 220 can accumulate the amount of degradation DT of the pixels SP based on the weights WT of the pixels SP and based on the previous compensation data CADATA[n-1] of the pixels SP. Here, the previous compensation data CADATA[n-1] can correspond to the compensation data CADATA output by the data compensation unit 230 in a compensation phase in which a previous amount of degradation has been reflected. The degradation accumulation unit 220 can calculate a previous age AGE[n-1] of the pixels SP corresponding to the previous compensation data CADATA[n-1] (for example, see FIG. 2B), and can accumulate the amount of degradation DT of the pixels SP based on the previous age AGE[n-1] and based on the previous compensation data CADATA[n-1]. Figure 12). The degradation accumulation unit 220 can apply the weight WT of the pixel SP to the current frame age AGE_Frame of the pixel SP, and can accumulate the weighted current frame age AGE_Frame to the previous age AGE[n-1] of the pixel SP. For example, the current age AGE[n] of the pixel SP can correspond to a value obtained by adding the product of the current frame age AGE_Frame of the pixel SP and the weight WT of the pixel SP to the previous age AGE[n-1] of the pixel SP (AGE[n] = AGE[n-1] + AGE_Frame x WT). The degradation accumulation unit 220 can calculate the degradation amount DT based on the current age AGE[n] of the pixel SP. Accordingly, the degradation accumulation unit 220 can calculate the current degradation amount DT[n] of the pixel SP by applying the current frame age AGE_Frame of the pixel SP and the weight WT of the pixel SP to the previous degradation amount DT[n-1] of the pixel SP. For example, the degradation amount DT calculated by the degradation accumulation unit 220 can increase as the weight WT becomes higher or as the previous compensation data CDATA[n-1] becomes larger, but is not limited thereto.

[0085] The data compensation unit 230 can generate compensation data CDATA[n] to be supplied to each of the pixels SP based on the degradation amount DT of each of the pixels SP. For example, the data compensation unit 230 can generate the compensation data CDATA[n] by applying the degradation amount DT of each of the pixels SP to a preset lookup table LUT. The data compensation unit 230 can supply the compensation data CDATA[n] to the data driver 300, and the data driver 300 can generate a data voltage based on the compensation data CDATA[n].

[0086] In Figure 8 , the display apparatus can calculate a first degradation amount DT1 based on the luminance of the plurality of pixels SP, can calculate a temperature depending on the positions of the plurality of pixels SP, and / or can calculate a light emission period and a light emission frequency of the plurality of pixels SP regardless of the amount of current flowing through the pixels SP and the number of light emitting elements EL of the pixels SP.

[0087] For example, because the display apparatus can include the weight calculation unit 210, the degradation accumulation unit 220, and the data compensation unit 230 shown in Figure 7 , a second degradation amount DT2 can be calculated based on the amount of current flowing through the pixels SP, the number of light emitting elements EL of the pixels SP, the luminance of the plurality of pixels SP, the temperature depending on the positions of the plurality of pixels SP, and / or the light emission period and / or the light emission frequency of the plurality of pixels SP.

[0088] The first error ER1 between the compensation data CATIA generated based on the first degradation amount DT1 and the compensation data CATIA generated based on the actual degradation amount DT3 of the display apparatus can be greater than a second error ER2 between the compensation data CATIA generated based on the second degradation amount DT2 and the compensation data CATIA generated based on the actual degradation amount DT3. Here, the compensation data CATIA can be afterimage compensation data of the display apparatus, and the first error ER1 or the second error ER2 can correspond to an afterimage compensation error. For example, when the compensation data CATIA is generated based on the first degradation amount DT1, the number of light emitting elements EL of the pixels SP is not applied such that it can not accurately measure the degradation amount of each of the pixels SP, and the plurality of pixels SP can not be properly compensated. Accordingly, when at least some of the pixels SP have different numbers of light emitting elements EL, the display apparatus calculates the weight WT and the degradation amount DT of the pixels SP based on the amount of current flowing through the pixels SP and based on the number of light emitting elements EL of the pixels SP. Accordingly, the degradation amount DT of the pixels SP can be accurately calculated, and the afterimage compensation function of the display apparatus is improved.

[0089] Figure 9 FIG. 2 is a flowchart illustrating an example of a process of generating compensation data in a display apparatus according to some embodiments.

[0090] Referring to Figure 9 The weight calculation unit 210 can receive weight information WI of each of the pixels SP supplied from the weight measurement system (operation S111). Here, when the pixels SP exhibit the same brightness, the weight information WI can include the amount of current flowing through each of the pixels SP and / or the number of light emitting elements EL of each of the pixels SP. Also, the weight information WI can further include the brightness of the plurality of pixels SP, the temperature depending on the positions of the plurality of pixels SP, and / or the light emission period and / or the light emission frequency of the plurality of pixels SP, but is not limited thereto.

[0091] The weight calculation unit 210 can calculate the weight WT of each of the pixels SP based on the weight information WI (operation S112). The weight calculation unit 210 can calculate the weight WT of the corresponding pixel SP in consideration of the magnitude of the current flowing through each of the light emitting elements EL of the corresponding pixel SP. The weight calculation unit 210 can supply the weight WT of each of the pixels SP to the degradation accumulation unit 220.

[0092] The degradation accumulation unit 220 can accumulate the amount of degradation DT of the pixel SP based on the weight WT of the pixel SP and the previous compensation data CADATA[n-1] of the pixel SP (operation S113). The degradation accumulation unit 220 can calculate the current amount of degradation DT[n] of the pixel SP by applying the current frame age AGE_Frame of the pixel SP and the weight WT of the pixel SP to the previous amount of degradation DT[n-1] of the pixel SP.

[0093] The data compensation unit 230 can generate compensation data CADATA[n] to be supplied to each of the pixels SP based on the amount of degradation DT of each of the pixels SP (operation S114). For example, the data compensation unit 230 can generate the compensation data CADATA[n] by applying the amount of degradation DT of each of the pixels SP to a preset lookup table LUT.

[0094] Figure 10 FIG. 11 is a flowchart illustrating another example of a process of generating compensation data in a display apparatus according to some embodiments.

[0095] Referring to FIG. 11, Figure 10 The weight calculation unit 210 can receive weight information WI of each of the pixel groups PG (operation S121). For example, each of the pixel groups PG can correspond to a group of pixels SP arranged along a corresponding row and column. Also, the pixel group PG can correspond to a group of pixels SP arranged at a corresponding point in the display area DA. Accordingly, when the plurality of pixel groups PG exhibit the same brightness, the weight information WI can include the amount of current flowing through each of the pixel groups PG and / or the number of light emitting elements EL of each of the pixel groups PG. Also, the weight information WI can further include the brightness of the plurality of pixel groups PG, the temperature depending on the position of the plurality of pixel groups PG, and / or the light emission period and / or the light emission frequency of the plurality of pixel groups PG, but is not limited thereto.

[0096] The weight calculation unit 210 can calculate the weight WT of each of the pixel groups PG based on the weight information WI (operation S122). The weight calculation unit 210 can calculate the weight WT of the corresponding pixel group PG in consideration of the magnitude of the current flowing through each of the light emitting elements EL of the corresponding pixel group PG. The weight calculation unit 210 can supply the weight WT of each of the pixel groups PG to the degradation accumulation unit 220.

[0097] The degradation accumulation unit 220 can accumulate the amount of degradation DT of the pixel group PG based on the weight WT of the pixel group PG and / or the previous compensation data CADATA[n-1] of the pixel group PG (operation S123). The degradation accumulation unit 220 can calculate the current amount of degradation DT[n] of the pixel group PG by applying the current frame age AGE_Frame of the pixel group PG and the weight WT of the pixel group PG to the previous amount of degradation DT[n-1] of the pixel group PG.

[0098] The data compensation unit 230 can generate compensation data CADATA[n] to be supplied to each of the pixel groups PG based on the amount of degradation DT of each of the pixel groups PG (operation S124). For example, the data compensation unit 230 can generate the compensation data CADATA[n] by applying the amount of degradation DT of each of the pixel groups PG to a preset lookup table LUT.

[0099] Figure 11 FIG. 17 is a flowchart illustrating another example of a process of generating compensation data in a display apparatus according to some embodiments.

[0100] Referring to FIG. 17, Figure 11 The weight calculation unit 210 can receive weight information WI of each of the pixel groups PG (operation S131). For example, each of the pixel groups PG can correspond to a group of pixels SP arranged along a respective row and column. Also, the pixel group PG can correspond to a group of pixels SP arranged at a respective point in the display area DA. Accordingly, when the plurality of pixel groups PG exhibit the same brightness, the weight information WI can include the amount of current flowing through each of the pixel groups PG and / or the number of light emitting elements EL of each of the pixel groups PG. Also, the weight information WI can further include the brightness of the plurality of pixel groups PG, the temperature depending on the position of the plurality of pixel groups PG, and / or the light emission period and / or the light emission frequency of the plurality of pixel groups PG, but is not limited thereto.

[0101] The weight calculation unit 210 can calculate the weight WT of each of the pixel blocks PB including the plurality of pixel groups PG based on the weight information WI of the pixel groups PG (operation S132). For example, the pixel block PB can correspond to a group of pixel groups PG corresponding to a point in the display area DA. The weight calculation unit 210 can calculate the weight WT of the respective pixel block PB in consideration of the magnitude of the current flowing through each of the light emitting elements EL of the respective pixel block PB. The weight calculation unit 210 can supply the weight WT of each of the pixel blocks PB to the degradation accumulation unit 220.

[0102] The degradation accumulation unit 220 can accumulate the amount of degradation DT of the pixel block PB based on the weight WT of the pixel block PB and / or the previous compensation data CADATA[n-1] of the pixel block PB (operation S133). The degradation accumulation unit 220 can calculate the current amount of degradation DT[n] of the pixel block PB by applying the current frame age AGE_Frame of the pixel block PB and / or the weight WT of the pixel block PB to the previous amount of degradation DT[n-1] of the pixel block PB.

[0103] The data compensation unit 230 can generate compensation data CADATA[n] to be supplied to each of the pixel blocks PB based on the amount of degradation DT of each of the pixel blocks PB (operation S134). For example, the data compensation unit 230 can generate the compensation data CADATA[n] by applying the amount of degradation DT of each of the pixel blocks PB to a preset lookup table LUT.

[0104] Figure 12 is a block diagram illustrating a timing controller of a display apparatus according to other embodiments. Figure 12 The display apparatus of Figure 7 The display apparatus of differs from the display apparatus of in components of the degradation accumulation unit 220, and thus a repeated description of components identical to those described above will be briefly mentioned or omitted.

[0105] Referring to Figure 12 , the timing controller 200 can include the weight calculation unit 210, the degradation accumulation unit 220, and the data compensation unit 230.

[0106] The weight calculation unit 210 can calculate the weight WT of each of the pixels SP based on the weight information WI. When a plurality of pixels SP exhibit the same luminance, the weight information WI can include the amount of current flowing through each of the pixels SP or the number of light emitting elements EL of each of the pixels SP. The weight calculation unit 210 can calculate the weight WT of the corresponding pixel SP in consideration of the magnitude of the current flowing through each of the light emitting elements EL of the corresponding pixel SP.

[0107] The degradation accumulation unit 220 can include an age calculation module 221 and a degradation accumulation module 222.

[0108] The age calculation module 221 can calculate a previous age AGE[n-1] of each of the pixels SP corresponding to the previous compensation data CADATA[n-1] of each of the pixels SP. Here, the previous compensation data CADATA[n-1] can correspond to the compensation data CADATA output by the data compensation unit 230 in a compensation stage in which a previous amount of degradation has been reflected. The age calculation module 221 can calculate a current age AGE[n] based on the previous age AGE[n-1] of the pixel SP and the current frame age AGE_Frame. For example, the age calculation module 221 can calculate the current age AGE[n] by adding the current frame age AGE_Frame of the pixel SP to the previous age AGE[n-1] of the pixel SP (AGE[n] = AGE[n-1] + AGE_Frame).

[0109] The degradation accumulation module 222 can accumulate the amount of degradation DT of the pixel SP based on the weight WT of the pixel SP and the current age AGE[n] of the pixel SP. The degradation accumulation module 222 can calculate the current amount of degradation DT[n] of the pixel SP by applying the weight WT of the pixel SP to the current age AGE[n] of the pixel SP.

[0110] Because the degradation accumulation unit 220 includes the age calculation module 221 and the degradation accumulation module 222, the previous compensation data CADATA[n-1] and the weight WT can be applied in stages, and the calculation load of the degradation accumulation unit 220 can be reduced.

[0111] The data compensation unit 230 can generate compensation data CADATA[n] to be supplied to each of the pixels SP based on the amount of degradation DT of each of the pixels SP. For example, the data compensation unit 230 can generate the compensation data CADATA[n] by applying the amount of degradation DT of each of the pixels SP to a preset lookup table LUT.

[0112] Figure 13 FIG. 7 is a flowchart illustrating an example of a process of generating compensation data in a display apparatus according to other embodiments.

[0113] Referring to FIG. 7, Figure 13 The weight calculation unit 210 can receive weight information WI of each of the pixels SP supplied from a weight measurement system (operation S211). Here, when a plurality of pixels SP exhibit the same luminance, the weight information WI can include an amount of current flowing through each of the pixels SP and a number of light emitting elements EL of each of the pixels SP.

[0114] The weight calculation unit 210 can calculate the weight WT of each of the pixels SP based on the weight information WI (operation S212). The weight calculation unit 210 can calculate the weight WT of the corresponding pixel SP in consideration of the magnitude of the current flowing through each of the light emitting elements EL of the pixel SP.

[0115] The age calculation module 221 can calculate the age AGE of each of the pixels SP based on the previous compensation data CADATA[n-1] of each of the pixels SP (operation S213). The age calculation module 221 can calculate a previous age AGE[n-1] corresponding to the previous compensation data CADATA[n-1] of the pixel SP. The age calculation module 221 can calculate a current age AGE[n] based on the previous age AGE[n-1] of the pixel SP and the current frame age AGE_Frame.

[0116] The degradation accumulation module 222 can accumulate the amount of degradation DT of the pixel SP based on the current age AGE[n] of the pixel SP and the weight WT of the pixel SP (operation S214). The degradation accumulation module 222 can calculate a current amount of degradation DT[n] of the pixel SP by applying the weight WT of the pixel SP to the current age AGE[n] of the pixel SP.

[0117] The data compensation unit 230 can generate compensation data CADATA[n] to be supplied to each of the pixels SP based on the amount of degradation DT of each of the pixels SP (operation S215). For example, the data compensation unit 230 can generate the compensation data CADATA[n] by applying the amount of degradation DT of each of the pixels SP to a preset lookup table LUT.

[0118] Figure 14 FIG. 22 is a flowchart illustrating another example of a process of generating compensation data in a display apparatus according to other embodiments.

[0119] Referring to FIG. 22, Figure 14 The weight calculation unit 210 can receive the weight information WI of each of the pixel groups PG (operation S221). For example, each of the pixel groups PG can correspond to a group of pixels SP arranged along a corresponding row and column. Also, the pixel group PG can correspond to a group of pixels SP arranged at a corresponding point in the display area DA. Accordingly, when a plurality of the pixel groups PG exhibit the same luminance, the weight information WI can include the amount of current flowing through each of the pixel groups PG and / or the number of light emitting elements EL of each of the pixel groups PG.

[0120] The weight calculation unit 210 can calculate the weight WT of each of the pixel groups PG based on the weight information WI (operation S222). The weight calculation unit 210 can calculate the weight WT of the corresponding pixel group PG in consideration of the magnitude of the current flowing through each of the light emitting elements EL of the corresponding pixel group PG.

[0121] The age calculation module 221 can calculate the age AGE of each of the pixel groups PG based on the previous compensation data CADATA[n-1] of each of the pixel groups PG (operation S223). The age calculation module 221 can calculate a previous age AGE[n-1] corresponding to the previous compensation data CADATA[n-1] of the pixel group PG. The age calculation module 221 can calculate a current age AGE[n] of the pixel group PG based on the previous age AGE[n-1] of the pixel group PG and the current frame age AGE_Frame.

[0122] The degradation accumulation module 222 can accumulate the amount of degradation DT of the pixel group PG based on the current age AGE[n] of the pixel group PG and the weight WT of the pixel group PG (operation S224). The degradation accumulation module 222 can calculate a current amount of degradation DT[n] of the pixel group PG by applying the weight WT of the pixel group PG to the current age AGE[n] of the pixel group PG.

[0123] The data compensation unit 230 can generate compensation data CADATA[n] to be supplied to each of the pixel groups PG based on the amount of degradation DT of each of the pixel groups PG (operation S225). For example, the data compensation unit 230 can generate the compensation data CADATA[n] by applying the amount of degradation DT of each of the pixel groups PG to a preset lookup table LUT.

[0124] Figure 15 FIG. 22 is a flowchart illustrating another example of a process of generating compensation data in a display apparatus according to another embodiment.

[0125] Referring to FIG. 22, Figure 15 The weight calculation unit 210 can receive the weight information WI of each of the pixel groups PG (operation S231). For example, each of the pixel groups PG can correspond to a group of pixels SP arranged along a corresponding row and column. Also, the pixel group PG can correspond to a group of pixels SP arranged at a corresponding point in the display area DA. Accordingly, when the pixel groups PG exhibit the same luminance, the weight information WI can include the amount of current flowing through each of the pixel groups PG and / or the number of light emitting elements EL of each of the pixel groups PG.

[0126] The weight calculation unit 210 can calculate a weight WT of each of the pixel blocks PB including the plurality of pixel groups PG based on the weight information WI of the pixel groups PG (operation S232). For example, the pixel block PB can correspond to a group of pixel groups PG corresponding to a point in the display area DA. The weight calculation unit 210 can calculate the weight WT of the corresponding pixel block PB in consideration of the magnitude of the current flowing through each of the light emitting elements EL of the corresponding pixel block PB.

[0127] The age calculation module 221 can calculate an age AGE of each of the pixel blocks PB based on the previous compensation data CADATA[n-1] of each of the pixel blocks PB (operation S233). The age calculation module 221 can calculate a previous age AGE[n-1] corresponding to the previous compensation data CADATA[n-1] of the pixel block PB. The age calculation module 221 can calculate a current age AGE[n] of the pixel block PB based on the previous age AGE[n-1] of the pixel block PB and the current frame age AGE_Frame.

[0128] The degradation accumulation module 222 can accumulate a degradation amount DT of each of the pixel blocks PB based on the current age AGE[n] of the pixel block PB and / or the weight WT of the pixel block PB (operation S234). The degradation accumulation module 222 can calculate a current degradation amount DT[n] of the pixel block PB by applying the weight WT of the pixel block PB to the current age AGE[n] of the pixel block PB.

[0129] The data compensation unit 230 can generate compensation data CADATA[n] to be supplied to each of the pixel blocks PB based on the degradation amount DT of each of the pixel blocks PB (operation S235). For example, the data compensation unit 230 can generate the compensation data CADATA[n] by applying the degradation amount DT of each of the pixel blocks PB to a preset lookup table LUT.

[0130] Figure 16 is a block diagram illustrating a timing controller of a display apparatus according to still other embodiments. Figure 16 The display apparatus of Figure 7 is different from the display apparatus of Figure 12 in terms of components of the degradation accumulation unit 220, and thus a repeated description of components identical to those described above will be briefly mentioned or omitted.

[0131] Referring to Figure 16 , the timing controller 200 can include a weight calculation unit 210, a degradation accumulation unit 220, and a data compensation unit 230.

[0132] The weight calculation unit 210 can calculate the first weight WT1 and the second weight WT2 of each of the pixels SP based on the weight information WI. When the plurality of pixels SP exhibit the same luminance, the weight information WI can include the amount of current flowing through each of the pixels SP or the number of the light emitting elements EL of each of the pixels SP. The weight calculation unit 210 can calculate the first weight WT1 and the second weight WT2 of the corresponding pixel SP in consideration of the magnitude of the current flowing through each of the light emitting elements EL of the corresponding pixel SP.

[0133] The deterioration accumulation unit 220 can include an age calculation module 221 and a deterioration accumulation module 222.

[0134] The age calculation module 221 can calculate the age AGE of each of the pixels SP based on the first weight WT1 of the pixel SP and the previous compensation data CADATA[n-1] of the pixel SP. Here, the previous compensation data CADATA[n-1] can correspond to the compensation data CADATA output by the data compensation unit 230 in a compensation stage in which a previous deterioration amount has been reflected. The age calculation module 221 can calculate a previous age AGE[n-1] corresponding to the previous compensation data CADATA[n-1] of the pixel SP. The age calculation module 221 can apply the first weight WT1 of the pixel SP to a current frame age AGE_Frame of the pixel SP, and can accumulate the weighted current frame age AGE_Frame to a previous age AGE[n-1] of the pixel SP. For example, a current age AGE[n] of the pixel SP can correspond to a value obtained by adding a product of the current frame age AGE_Frame of the pixel SP and the first weight WT1 of the pixel SP to the previous age AGE[n-1] of the pixel SP (AGE[n] = AGE[n-1] + AGE_Frame × WT1). Accordingly, the age calculation module 221 can calculate the current age AGE[n] by applying the current frame age AGE_Frame of the pixel SP and the first weight WT1 of the pixel SP to the previous age AGE[n-1] of the pixel SP.

[0135] The deterioration accumulation module 222 can accumulate the amount of deterioration DT of the pixel SP based on the second weight WT2 of the pixel SP and the current age AGE[n] of the pixel SP. The deterioration accumulation module 222 can calculate the current amount of deterioration DT[n] of the pixel SP by applying the second weight WT2 of the pixel SP to the current age AGE[n] of the pixel SP. For example, the current amount of deterioration DT[n] of the pixel SP can correspond to a product of the current age AGE[n] of the pixel SP and the second weight WT2 (DT[n] = AGE[n] x WT2). Accordingly, the deterioration accumulation module 222 can calculate the current amount of deterioration DT[n] of the pixel SP by applying the second weight WT2 of the pixel SP to the current age AGE[n] of the pixel SP.

[0136] Because the deterioration accumulation unit 220 includes the age calculation module 221 and the deterioration accumulation module 222, the previous compensation data CADATA[n-1] and the first weight WT1 and the second weight WT2 can be applied in stages, and the calculation load of the deterioration accumulation unit 220 can be reduced.

[0137] The data compensation unit 230 can generate compensation data CADATA[n] to be supplied to each of the pixels SP based on the amount of deterioration DT of each of the pixels SP. For example, the data compensation unit 230 can generate the compensation data CADATA[n] by applying the amount of deterioration DT of each of the pixels SP to a preset lookup table LUT.

[0138] Figure 17 FIG. 10 is a flowchart illustrating an example of a process of generating compensation data in a display device according to still other embodiments.

[0139] Referring to Figure 17 The weight calculation unit 210 can receive weight information WI of each of the pixels SP supplied from a weight measurement system (operation S311). Here, when a plurality of pixels SP exhibit the same luminance, the weight information WI can include an amount of current flowing through each of the pixels SP and a number of light emitting elements EL of each of the pixels SP.

[0140] The weight calculation unit 210 can calculate the first weight WT1 and the second weight WT2 of each of the pixels SP based on the weight information WI (operation S312). The weight calculation unit 210 can calculate the first weight WT1 and the second weight WT2 of the corresponding pixel SP in consideration of the magnitude of the current flowing through each of the light emitting elements EL of the corresponding pixel SP.

[0141] The age calculation module 221 can calculate an age AGE of each of the pixels SP based on the first weight WT1 of the pixel SP and the previous compensation data CADATA[n-1] of the pixel SP (operation S313). The age calculation module 221 can calculate a current age AGE[n] of the pixel SP by applying the first weight WT1 of the pixel SP and the current frame age AGE_Frame to a previous age AGE[n-1] of the pixel SP.

[0142] The degradation accumulation module 222 can accumulate a degradation amount DT of the pixel SP based on the second weight WT2 of the pixel SP and / or the current age AGE[n] of the pixel SP (operation S314). The degradation accumulation module 222 can calculate a current degradation amount DT[n] of the pixel SP by applying the second weight WT2 of the pixel SP to the current age AGE[n] of the pixel SP.

[0143] The data compensation unit 230 can generate compensation data CADATA[n] to be supplied to each of the pixels SP based on the degradation amount DT of each of the pixels SP (operation S315). For example, the data compensation unit 230 can generate the compensation data CADATA[n] by applying the degradation amount DT of each of the pixels SP to a preset lookup table LUT.

[0144] Figure 18 FIG. 17 is a flowchart illustrating another example of a process of generating compensation data in a display apparatus according to still another embodiment.

[0145] Referring to FIG. 17, Figure 18 The weight calculation unit 210 can receive weight information WI of each of the pixel groups PG (operation S321). For example, each of the pixel groups PG can correspond to a group of pixels SP arranged along a corresponding row and column. Also, the pixel group PG can correspond to a group of pixels SP arranged at a corresponding point in the display area DA. Accordingly, when the plurality of pixel groups PG exhibit the same luminance, the weight information WI can include an amount of current flowing through each of the pixel groups PG and a number of the light emitting elements EL of each of the pixel groups PG.

[0146] The weight calculation unit 210 can calculate the first weight WT1 and the second weight WT2 of each of the pixel groups PG based on the weight information WI (operation S322). The weight calculation unit 210 can calculate the first weight WT1 and the second weight WT2 of the corresponding pixel group PG in consideration of a magnitude of current flowing through each of the light emitting elements EL of the corresponding pixel group PG.

[0147] The age calculation module 221 can calculate an age AGE of each of the pixel groups PG based on the first weight WT1 of the pixel group PG and / or the previous compensation data CADATA[n-1] of the pixel group PG (operation S323). The age calculation module 221 can calculate a current age AGE[n] of the pixel group PG by applying the first weight WT1 of the pixel group PG and the current frame age AGE_Frame to a previous age AGE[n-1] of the pixel group PG.

[0148] The degradation accumulation module 222 can accumulate a degradation amount DT of the pixel group PG based on the second weight WT2 of the pixel group PG and / or the current age AGE[n] of the pixel group PG (operation S324). The degradation accumulation module 222 can calculate a current degradation amount DT[n] of the pixel group PG by applying the second weight WT2 of the pixel group PG to the current age AGE[n] of the pixel group PG.

[0149] The data compensation unit 230 can generate compensation data CADATA[n] to be supplied to each of the pixel groups PG based on the degradation amount DT of each of the pixel groups PG (operation S325). For example, the data compensation unit 230 can generate the compensation data CADATA[n] by applying the degradation amount DT of each of the pixel groups PG to a preset lookup table LUT.

[0150] Figure 19 FIG. 34 is a flowchart illustrating another example of a process of generating compensation data in a display apparatus according to still other embodiments.

[0151] Referring to FIG. 34, Figure 19 The weight calculation unit 210 can receive weight information WI of each of the pixel groups PG (operation S331). For example, each of the pixel groups PG can correspond to a group of pixels SP arranged along a respective row and column. Also, the pixel groups PG can correspond to a group of pixels SP arranged at a respective point in the display area DA. Accordingly, when the plurality of pixel groups PG exhibit the same brightness, the weight information WI can include an amount of current flowing through each of the pixel groups PG and a number of light emitting elements EL of each of the pixel groups PG.

[0152] The weight calculation unit 210 can calculate the first weight WT1 and the second weight WT2 of each of the pixel blocks PB including the plurality of pixel groups PG based on the weight information WI of the pixel group PG (operation S332). The weight calculation unit 210 can calculate the first weight WT1 and the second weight WT2 of the respective pixel blocks PB in consideration of a magnitude of current flowing through each of the light emitting elements EL of the respective pixel blocks PB.

[0153] The age calculation module 221 can calculate an age AGE of each of the pixel blocks PB based on the first weight WT1 of the pixel block PB and the previous compensation data CADATA[n-1] of the pixel block PB (operation S333). The age calculation module 221 can calculate a current age AGE[n] of the pixel block PB by applying the first weight WT1 of the pixel block PB and the current frame age AGE_Frame to a previous age AGE[n-1] of the pixel block PB.

[0154] The degradation accumulation module 222 can accumulate a degradation amount DT of the pixel block PB based on the second weight WT2 of the pixel block PB and the current age AGE[n] of the pixel block PB (operation S334). The degradation accumulation module 222 can calculate a current degradation amount DT[n] of the pixel block PB by applying the second weight WT2 of the pixel block PB to the current age AGE[n] of the pixel block PB.

[0155] The data compensation unit 230 can generate compensation data CADATA[n] to be supplied to each of the pixel blocks PB based on the degradation amount DT of each of the pixel blocks PB (operation S335). For example, the data compensation unit 230 can generate the compensation data CADATA[n] by applying the degradation amount DT of each of the pixel blocks PB to a preset lookup table LUT.

[0156] At the end of the detailed description, those skilled in the art will understand that many changes and modifications can be made to the embodiments without substantially departing from the principles of the present disclosure. Accordingly, the disclosed embodiments are used only by way of illustration and are not intended to be limiting in purpose.

Claims

1. A display device, comprising: Multiple pixels, including light-emitting elements; The weight calculation unit is configured to calculate the magnitude of the current flowing through a light-emitting element of a pixel based on the amount of current flowing through one of the plurality of pixels and the number of light-emitting elements of the pixel, and to calculate the weight of the pixel based on the magnitude of the current. A degradation accumulation unit is configured to accumulate the degradation amount of a pixel based on the weight of the pixel among the plurality of pixels and previous compensation data; as well as The data compensation unit is configured to generate compensation data to be supplied to the one pixel based on the degradation amount of the one pixel among the plurality of pixels. The weight calculated by the weight calculation unit becomes higher as the amount of flowing current increases or as the number of light-emitting elements decreases.

2. The display device according to claim 1, wherein, At least some of the plurality of pixels have a different number of the light-emitting elements.

3. The display device according to claim 1, wherein, The degradation accumulation unit is further configured to accumulate the current degradation amount of the pixel among the plurality of pixels by accumulating the product of the current frame age of the pixel and the weight of the pixel with the previous degradation amount of the pixel.

4. The display device according to claim 1, wherein, The amount of degradation calculated by the degradation accumulation unit increases as the weight becomes higher or as the previous compensation data becomes larger.

5. The display device according to claim 1, wherein, The data compensation unit is further configured to generate the compensation data by applying the degradation amount to a preset lookup table.

6. The display device according to claim 1, wherein, The weight calculation unit is further configured to calculate the weight of the pixel group based on the amount of current flowing through a pixel group including some of the plurality of pixels and the number of light-emitting elements in the pixel group.

7. The display device according to claim 6, further comprising a display area having the plurality of pixels and a non-display area surrounding the display area. in, The pixel group corresponds to a corresponding point in the display area.

8. The display device according to claim 1, wherein, The weight calculation unit is further configured to calculate the weight of the pixel block including the pixel group based on the amount of current flowing through a pixel group having some of the plurality of pixels and the number of light-emitting elements in the pixel group.

9. The display device according to claim 1, wherein, The plurality of pixels also includes pixel circuitry connected to data lines, gate lines, and drive voltage lines, and The light-emitting element is connected between the output node of the pixel circuit and the low-potential line.

10. The display device according to claim 1, wherein, The degradation accumulation unit includes: An age calculation module is configured to calculate the age of a pixel based on the previously compensated data of the pixel among the plurality of pixels; and The degradation accumulation module is configured to accumulate the degradation amount of the pixel based on the weight of the pixel among the plurality of pixels and the age.

11. The display device according to claim 10, wherein, The weight calculation unit is further configured to calculate the weight of the pixel group based on the amount of current flowing through a pixel group having some of the plurality of pixels and the number of light-emitting elements in the pixel group.

12. The display device according to claim 11, wherein, The degradation accumulation module is further configured to accumulate the degradation amount of the pixel group by applying the weight of the pixel group to the age of the pixel group.

13. The display device according to claim 10, wherein, The weight calculation unit is further configured to calculate the weight of the pixel block including the pixel group based on the amount of current flowing through a pixel group having some of the plurality of pixels and the number of light-emitting elements in the pixel group.

14. The display device according to claim 13, wherein, The degradation accumulation module is further configured to accumulate the degradation amount of the pixel block by applying the weight of the pixel block to the age of the pixel block.

15. The display device according to claim 1, wherein, The degradation accumulation unit includes: An age calculation module is configured to calculate the age of a pixel based on previously compensated data of one of the plurality of pixels and a first weight as part of the weight; and The degradation accumulation module is configured to accumulate the degradation amount of the one pixel among the plurality of pixels based on a second weight, which is another part of the weight, and based on the age of the one pixel among the plurality of pixels.

16. The display device according to claim 15, wherein, The weight calculation unit is further configured to calculate a first weight and a second weight of the pixel group based on the amount of current flowing through a pixel group including some of the plurality of pixels and based on the number of light-emitting elements in the pixel group.

17. The display device according to claim 16, wherein, The age calculation module is further configured to calculate the age of the pixel group based on the first weight of the pixel group and based on the previous compensation data of the pixel group, and The degradation accumulation module is further configured to accumulate the degradation amount of the pixel group by applying the second weight of the pixel group to the age of the pixel group.

18. The display device according to claim 15, wherein, The weight calculation unit is further configured to calculate a first weight and a second weight of the pixel block including the pixel group based on the amount of current flowing through a pixel group having some of the plurality of pixels and based on the number of light-emitting elements in the pixel group.

19. The display device according to claim 18, wherein, The age calculation module is further configured to calculate the age of the pixel block based on the first weight of the pixel block and based on the previous compensation data of the pixel block, and The degradation accumulation module is further configured to accumulate the degradation amount of the pixel block by applying the second weight of the pixel block to the age of the pixel block.

Images