Compensation method and compensation device of display panel and display device

Abstract

The invention discloses a compensation method and a compensation device of a display panel and a display device. The compensation method comprises the following steps: acquiring first digit data of historical aging data; the first digit data is data of high digits of the historical aging data, and the first digit is smaller than the digit of the historical aging data; and obtaining compensation parameters of the display panel according to the first digit data and the compensation table corresponding to the first digit data. The display effect of the display panel can be improved, the space of the storage unit is reduced, and DDIC or TCON cost is reduced.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to a compensation method, a compensation device and a display device for a display panel. Background Art

[0002] As the display panel is used for a long time, it will age, causing the brightness to decay. Existing display panels usually need to be compensated for aging. In the prior art, the storage of aging data takes up a large space, resulting in a high cost for the display panel. Summary of the invention

[0003] The present invention provides a compensation method, a compensation device and a display device for a display panel, which can improve the display effect of the display panel, reduce the space of a storage unit, reduce the cost of DDIC or TCON, and reduce the cost of the display panel.

[0004] According to one aspect of the present invention, a compensation method for a display panel is provided, comprising:

[0005] Get the first digit data of the historical aging data; the first digit data is the high-digit data of the historical aging data, and the first digit is smaller than the digit of the historical aging data;

[0006] According to the first digit data and the compensation table corresponding to the first digit data, the compensation parameters of the display panel are obtained.

[0007] Optionally, before obtaining the first digit of historical aging data, the following is also included:

[0008] Obtain the aging increase data of the current display panel;

[0009] According to the aging increase data and the historical aging data, updated historical aging data is obtained;

[0010] Output the updated historical aging data; wherein the sum of the number of digits of the aging-added data and the first digit is less than the number of digits of the historical aging data;

[0011] Optionally, obtain the first digit of historical aging data, including:

[0012] Get the first digit data corresponding to the updated historical aging data.

[0013] Optionally, the temporary storage bit width of the first digit data is smaller than the storage bit width of the historical aging data;

[0014] Optionally, the temporary storage bit width of the aging-increased data of the display panel is smaller than the bit width of the historical aging data;

[0015] Optionally, the sum of the temporary storage bit width of the aging increase data of the display panel and the temporary storage bit width of the first digit data is smaller than the storage bit width of the historical aging data.

[0016] Optionally, updated historical aging data is obtained according to the aging increase data and the historical aging data, including:

[0017] Obtaining aging increase data and historical aging data within a preset period, and obtaining updated historical aging data;

[0018] Optionally, the bit width of the aging increase data of the display panel is less than or equal to a first preset bit width;

[0019] The first preset bit width satisfies: Among them, the sampling interval is the time interval for obtaining aging data, the backup interval is the preset period, and C_G255 is the maximum loss value required for a single sampling of 255 grayscales;

[0020] Optionally, within a preset period, aging is performed in sequence according to the sampling period to increase data sampling;

[0021] Obtain updated historical aging data based on the aging increase data and historical aging data sampled at a preset period;

[0022] Optionally, within a preset period, aging is performed in sequence according to the sampling period to increase data sampling;

[0023] Optionally, aging is performed on each frame of data of the display panel to increase data value sampling.

[0024] Optionally, updated historical aging data is obtained according to the aging increase data and the historical aging data, including:

[0025] When the remaining bit width of the aging-added data of the display panel is less than or equal to the second preset bit width, obtaining updated historical aging data according to the aging-added data and the historical aging data;

[0026] Optionally, the second preset bit width is less than or equal to a set value;

[0027] Optional, set the value to 0 or 1.

[0028] Optionally, updated historical aging data is obtained according to the aging increase data and the historical aging data, including:

[0029] reading at least a portion of the historical aging data at a first bit width;

[0030] updating at least a portion of the historical aging data based on at least a portion of the historical aging data and the aging increase data;

[0031] outputting at least a portion of the updated historical aging data;

[0032] Update the remaining historical aging data in sequence according to the first bit width and output them;

[0033] Optionally, the first bit width is less than or equal to the storage bit width of the historical aging data;

[0034] Optionally, the first bit width is the storage bit width of one pixel in the historical aging data;

[0035] Optionally, the first bit width is the storage bit width of one or several rows of pixels in the historical aging data, and the historical aging data of one or several rows of pixels are read each time and updated and output.

[0036] Optionally, obtain the first digit of historical aging data, including:

[0037] After each set compensation time interval, the first digit of the historical aging data of each sub-pixel is obtained.

[0038] According to another aspect of the present invention, there is provided a compensation device for a display panel, comprising:

[0039] A first control unit is used to obtain the first digit data of the historical aging data; the first digit data is the data of the high digit of the historical aging data, and the first digit is smaller than the digit of the historical aging data;

[0040] The second control unit is used to obtain compensation parameters of the display panel according to the first digit data and the compensation table corresponding to the first digit data.

[0041] Optionally, the compensation device further comprises:

[0042] An accumulation unit, used for obtaining the aging increase data of the current display panel before obtaining the first digit of the historical aging data;

[0043] A third control unit, configured to obtain updated historical aging data according to the aging increase data and the historical aging data;

[0044] A fourth control unit is used to output updated historical aging data; wherein the sum of the number of digits of the aging-added data and the first digit is less than the number of digits of the historical aging data;

[0045] Optionally, the first control unit includes:

[0046] Get the first digit data corresponding to the updated historical aging data.

[0047] According to another aspect of the present invention, a display device is provided, comprising the compensation device described in any embodiment of the present invention.

[0048] The compensation method for a display panel provided by the technical solution of the embodiment of the present invention includes obtaining the first digit data of historical aging data; the first digit data is the data of the high digit of the historical aging data, and the first digit is smaller than the digit of the historical aging data; according to the first digit data and the compensation table corresponding to the first digit data, the compensation parameter of the display panel is obtained. The compensation method in the embodiment of the present invention is to compensate according to the data of the high digit in the historical aging data, and the internal storage space is small, which can reduce the space of the internal storage unit, thereby reducing the area and cost of the DDIC or TCON in the display panel, and reducing the cost of the display panel.

[0049] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0051] Figure 1 The invention is a schematic diagram of an aging compensation device for a display panel.

[0052] Figure 2 A schematic diagram showing the brightness of a display panel.

[0053] Figure 3 The present invention is a schematic diagram of a memory and a storage unit of a display panel.

[0054] Figure 4 It is a flow chart of a compensation method for a display panel provided by an embodiment of the present invention.

[0055] Figure 5 This is a flow chart of another display panel compensation method provided by an embodiment of the present invention.

[0056] Figure 6 This is a flow chart of another display panel compensation method provided by an embodiment of the present invention.

[0057] Figure 7 This is a flow chart of another display panel compensation method provided by an embodiment of the present invention.

[0058] Figure 8 It is a schematic diagram of bit width division of a display panel provided by an embodiment of the present invention.

[0059] Fig. 9 This is another schematic diagram of bit width division of a display panel provided by an embodiment of the present invention.

[0060] Fig.10 This is a flow chart of another display panel compensation method provided by an embodiment of the present invention.

[0061] Fig.11 is another schematic diagram showing the brightness of a display panel.

[0062] Fig.12 It is a schematic diagram of the brightness of a display panel provided by an embodiment of the present invention.

[0063] Fig.13 It is a schematic diagram of an aging compensation device for a display panel provided by an embodiment of the present invention.

[0064] Fig.14 The present invention is a timing diagram of an aging compensation device for a display panel.

[0065] Fig.15 This is a timing diagram of an aging compensation device for a display panel provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0066] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0067] It should be noted that the terms "first", "second", etc. in the present invention are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products, or devices.

[0068] In order to facilitate the understanding of the embodiments of the present application, the present application first specifically describes the problems existing in the related art:

[0069] The organic light-emitting materials of the organic light-emitting diode (OLED) display panel will age after long-term use, causing problems such as luminous brightness attenuation. In current display panels, the circuit design of the display driver integrated circuit (DDIC) or the timing controller (TCON) will use a de-burn in module to compensate for aging, and the design of the DDIC or TCON will use an embedded static random access memory (eSRAM) or a synchronous dynamic random access memory (SDRAM) to cache and record the aging data of each sub-pixel in the display panel. Since the aging data of the sub-pixels of the entire display panel needs to be accumulated, calculated and stored, a large storage space is required, and the design module of the large-space memory will increase the cost of the DDIC or TCON.

[0070] Figure 1 is a schematic diagram of an aging compensation device for a display panel. Figure 2 is a schematic diagram of the brightness of a display panel, see Figure 1 and Figure 2 The solution to the brightness attenuation problem of OLED display panels is to add a De-Burn In (DBI) module 200 to the circuit design of DDIC or TCON. Figure 2 The sub-pixel includes a red sub-pixel (R), a green sub-pixel (G) and a blue sub-pixel (B). As time goes by, the brightness curves of the RGB sub-pixels will decay. The black dotted line indicates that the brightness of the white light does not decay after the De-Burn In (DBI) module 200 is added. The aging compensation device includes a memory 100 and an anti-aging module 200. The internal storage unit 20 of the DDIC or TCON caches the accumulated data (Data) representing the life of each sub-pixel, that is, the aging data. Since the storage unit 20 is volatile when power is off, an external non-volatile memory 100 is required for storage, that is, the latest accumulated aging data in the storage unit 20 needs to be stored in the memory 100 regularly.

[0071] After the DDIC or TCON is powered on, the access controller 30 inside the DDIC or TCON will read the aging data from the external memory 100 and store it in the internal storage unit 20; the control unit 10 inside the DDIC or TCON will read the aging data placed in the storage unit 20 to perform calculations and obtain the compensation value for each sub-pixel; therefore, the internal storage unit 20 and the memory 100 need to be set to the same size, and to ensure accurate compensation, the accumulated aging data in the storage unit 20 needs to be completely backed up in the external memory 100; when the power is turned on, the aging data of each sub-pixel of the entire display panel in the memory 100 needs to be transferred to the storage unit 20, so the space of the storage unit 20 needs to be larger.

[0072] Figure 3 A schematic diagram of a memory and storage unit of a display panel, referring to Figure 1 and Figure 3 , because the storage process of the internal storage unit 20 of DDIC or TCON is stored with the maximum fixed bit width, the space capacity of the storage unit 20 is the size of the screen resolution * the maximum bit width of the storage life data of each sub-pixel; for example: 1920 vertical * 1080 horizontal * 3RGB * 40bit ≈ 248M. When compensating the display panel, the aging data of each sub-pixel of the entire display panel in the memory 100 needs to be transferred to the storage unit 20, and the compensation parameters of the display panel are obtained according to all the aging data in the storage unit 20. The area of ​​the storage unit 20 accounts for a large proportion of the area of ​​the entire DDIC or TCON, so its size plays a decisive role in the area and cost of the DDIC or TCON.

[0073] In order to solve the above problems, an embodiment of the present invention provides a compensation method for a display panel. Figure 4 is a flow chart of a compensation method for a display panel provided by an embodiment of the present invention, with reference to Figure 4 , the compensation method of the display panel includes:

[0074] S110, obtaining the first digit data of the historical aging data; the first digit data is the high-digit data of the historical aging data, and the first digit data is smaller than the digit of the historical aging data.

[0075] The historical aging data is determined based on all display data of the sub-pixel before the historical moment, and the historical aging data includes high-digit data, middle-digit data, and low-digit data. The first-digit data may be all high-digit data, or may be part of the high-digit data; the first-digit data may be high-n-digit data, and the high-n-digit data is the m-n+1th to mth-digit data of the historical aging data, where m is greater than n, and both m and n are integers greater than 1. For example, if n is 10 and m is 20, the high-10-digit data refers to the 11th to 20th-digit data.

[0076] It should be noted that a display panel has multiple sub-pixels, each of which has a historical aging data. The first digit data in this embodiment refers to the first digit data of the historical aging data corresponding to a sub-pixel. By acquiring the first digit data corresponding to each sub-pixel, the first digit data of all sub-pixels of the display panel are obtained. Acquiring the first digit data of the historical aging data refers to acquiring the first digit data of the historical aging data corresponding to all sub-pixels or at least one sub-pixel.

[0077] The historical aging data can be updated at regular intervals, or when the aging increase data of the display panel reaches a certain size, the historical aging data is updated; the current display data of the display panel at the current moment is obtained, and the current display data and the accumulated aging data of each sub-pixel are accumulated to obtain the aging increase data of the current display panel; the accumulated aging data is the accumulated sum of multiple frames of display data between the historical moment and the current moment; the aging increase data and the historical aging data are accumulated to obtain the updated historical aging data.

[0078] In the prior art, it is necessary to obtain the historical aging data of each sub-pixel of the entire display panel for compensation, that is, it is necessary to obtain the aging data accumulated from all display data of each sub-pixel before the historical moment and from the historical moment to the current moment. The first digit of the historical aging data of each sub-pixel before the historical moment is only used in the embodiment of the present invention. Therefore, the compensation method in the embodiment of the present invention requires a smaller internal storage space, which can reduce the space of the internal storage unit, thereby reducing the area and cost of the DDIC or TCON in the display panel and reducing the cost of the display panel. And because the amount of stored data is small, the compression rate of the stored data can be reduced, thereby improving the compensation effect.

[0079] S120 , obtaining compensation parameters of the display panel according to the first digit data and a compensation table corresponding to the first digit data.

[0080] Among them, in the compensation table corresponding to the first-digit data, there are the first-digit data and the corresponding compensation data. According to the first-digit data and the corresponding compensation table, the compensation parameters of the display panel can be obtained, and the compensation parameters can be compensated driving data; the compensation data of the display panel is compensated according to the determined compensation parameters to improve the uniformity of the display panel, and the compensation is performed by looking up a table. While ensuring the compensation effect, the compensation algorithm can be simplified and the compensation speed can be improved.

[0081] It should be noted that the lookup table is a compensation data table corresponding to the display data of the sub-pixel corresponding to the first digit of the historical aging data of the sub-pixel of the display panel. The display data may be voltage data, and the compensation data may also be voltage data.

[0082] The compensation method for a display panel provided by the technical solution of the embodiment of the present invention includes obtaining the first digit data of historical aging data; the first digit data is the data of the high digit of the historical aging data, and the first digit is smaller than the digit of the historical aging data; according to the first digit data and the compensation table corresponding to the first digit data, the compensation parameter of the display panel is obtained. The compensation method in the embodiment of the present invention is to compensate according to the data of the high digit in the historical aging data, and the internal storage space is small, which can reduce the space of the internal storage unit, thereby reducing the area and cost of the DDIC or TCON in the display panel, and reducing the cost of the display panel.

[0083] Optional, Figure 5 is a flow chart of another display panel compensation method provided by an embodiment of the present invention, referring to Figure 5 , compensation methods also include:

[0084] S210: Obtain aging increase data of the current display panel.

[0085] Among them, the current display data of the display panel at the current moment can be obtained first, and the current display data and the accumulated aging data of each sub-pixel are accumulated to obtain the aging increase data of the current display panel; the current display data of the display panel at the current moment is obtained, and the current display data at the current moment is the data of the picture to be displayed by the display panel at the current moment, and the current display data includes the position and driving data of each sub-pixel of the current display picture. The accumulated aging data is the accumulated sum of multiple frames of display data from the historical moment to the current moment, and the historical moment to the current moment includes multiple moments, each moment has a frame of picture, and each frame of picture has a set of display data. The display data in each frame of picture is accumulated, and the accumulated result is the accumulated aging data.

[0086] It should be noted that, in the present embodiment, the accumulation of data refers to the accumulation of the number of frames or duration of the same driving data in the display screen of each sub-pixel, and the accumulation result may be the sum of the number of frames corresponding to each driving data of each sub-pixel, or the sum of the duration of each driving data. In addition, the number of frames or duration of the driving data may be normalized before accumulation, for example, the number of frames of multiple different driving data corresponding to each sub-pixel may be normalized to the number of frames under the preset driving data, and the duration of multiple different driving data corresponding to each sub-pixel may be normalized to the duration under the preset driving data. Exemplarily, for a certain sub-pixel, the number of frames under the A driving data is 1, which may be equivalent to the number of frames under the B driving data being 1 / 2. Performing normalization during accumulation can reduce the difficulty of accumulation and reduce the amount of driving data that needs to be stored.

[0087] S220: Obtain updated historical aging data according to the aging increase data and the historical aging data.

[0088] The historical aging data can be updated at regular intervals, or when the aging increase data of the display panel reaches a certain size, the historical aging data is updated; the historical aging data includes the historical aging data of each sub-pixel in the display panel, the historical aging data is determined based on all display data of the sub-pixel before the historical moment, and the historical aging data includes the complete historical aging data of each sub-pixel before the historical moment. The updated historical aging data can be obtained based on the aging increase data and the historical aging data, and the updated historical aging data can be obtained by accumulating the aging increase data and the historical aging data, and the updated historical aging data includes the aging data accumulated from all display data of each sub-pixel before the historical moment and from the historical moment to the current moment.

[0089] S230, outputting updated historical aging data; wherein the sum of the number of digits of the aging-added data and the first digit is smaller than the number of digits of the historical aging data.

[0090] Among them, outputting the updated historical aging data can be understood as outputting the updated historical aging data to an external non-power-off volatile memory for storage. The sum of the number of bits of the aging-added data and the first digit is less than the number of bits of the historical aging data. For example, the display data of the sub-pixel may include 1 to m bits of data, the historical aging data includes 1 to m bits of data, the aging-added data includes 1 to t bits of data, and the first digit data includes the m-n+1th bit to the mth bit of data, m is greater than n, n is greater than t, and m, n and t are all integers greater than 1. If t is 5, n is 10, and m is 20, the historical aging data includes 20 bits of data, the aging-added data includes 5 bits of data, and the first digit data includes 10 bits of data. Therefore, the internal storage bit width of the storage unit can be reduced, and the space of the storage unit in the aging compensation module can be reduced, thereby reducing the area and cost of DDIC or TCON and reducing the cost of the display panel. And because the amount of stored data is small, the compression rate of the stored data can be reduced, and the effect of aging compensation can be improved.

[0091] S111 . Obtain first digit data corresponding to updated historical aging data.

[0092] Among them, the updated historical aging data includes aging data accumulated from all display data of each sub-pixel before the historical moment and from the historical moment to the current moment. Obtaining the first digit data corresponding to the updated historical aging data can make the compensation effect of the display panel better.

[0093] S120 , obtaining compensation parameters of the display panel according to the first digit data and a compensation table corresponding to the first digit data.

[0094] Optionally, the temporary storage bit width of the first digit data is smaller than the storage bit width of the historical aging data.

[0095] The storage bit width of the historical aging data is the storage bit width of the complete lifespan, and the temporary storage bit width of the first digit data is the high-order data of the historical aging data, which is only a part of the historical aging data. If the storage bit width of the complete lifespan is 40 bits, the temporary storage bit width of the first digit data can be reduced to 20 bits to reduce costs. The storage bit width can be the storage bit width of one sub-pixel, or the storage bit width of multiple sub-pixels or all sub-pixels.

[0096] Optionally, a temporary storage bit width of the aging-increased data of the display panel is smaller than a bit width of the historical aging data.

[0097] The temporary storage bit width of the aging-increased data of the display panel is smaller than the bit width of the historical aging data, and the aging-increased data is local low-bit data, which can reduce the internal storage space and thus reduce the cost.

[0098] Optionally, the sum of the temporary storage bit width of the aging increase data of the display panel and the temporary storage bit width of the first digit data is less than the storage bit width of the historical aging data. The temporary storage bit width can be the temporary storage bit width of one sub-pixel, or the temporary storage bit width of multiple sub-pixels or all sub-pixels.

[0099] Among them, in the prior art, the storage bit width of the internal storage unit is the storage bit width of the completed life, and the storage bit width in the internal storage unit is the same as the storage bit width of the historical aging data; while in the embodiment of the present invention, the sum of the temporary storage bit width of the aging increase data of the display panel and the temporary storage bit width of the first digit data is less than the storage bit width of the historical aging data, which can reduce the space of the storage unit in the aging compensation module, thereby reducing the area and cost of DDIC or TCON, and reducing the cost of the display panel.

[0100] Optionally, based on the above embodiment, S220, obtaining updated historical aging data according to the aging increase data and the historical aging data, is specifically refined to include: S221 obtaining the historical aging data increase value and the historical aging data within a preset period to obtain updated historical aging data.

[0101] Figure 6 is a flow chart of another display panel compensation method provided by an embodiment of the present invention, referring to Figure 6 , compensation methods also include:

[0102] S210: Obtain aging increase data of the current display panel.

[0103] S221 acquires the aging increase data and the historical aging data within a preset period to obtain updated historical aging data.

[0104] Wherein, the preset period may include multiple sampling periods, each sampling period may be a sampling area to be updated of the display panel, and the display panel includes at least two areas to be updated; exemplarily, if each or at least one pixel row of the display panel is used as an area to be updated. Exemplarily, the display panel includes a first area to be updated and a second area to be updated, and the preset period includes a first sampling period and a second sampling period; in the first sampling period, the aging increase data in the first area to be updated of the display panel and the data of the first area to be updated in the corresponding historical aging data are accumulated to obtain the updated historical aging data of the first area to be updated; then in the second sampling period, the aging increase data in the second area to be updated of the display panel and the data of the second area to be updated in the corresponding historical aging data are accumulated to obtain the updated historical aging data of the second area to be updated; thus, the aging increase data and the historical aging data within the preset period can be taken to obtain the updated historical aging data. In this way, the storage space of the internal storage unit can be reduced, thereby reducing the area and cost of DDIC or TCON.

[0105] S230, outputting updated historical aging data; wherein the sum of the number of digits of the aging-added data and the first digit is smaller than the number of digits of the historical aging data.

[0106] S111 . Obtain first digit data corresponding to updated historical aging data.

[0107] S120 , obtaining compensation parameters of the display panel according to the first digit data and a compensation table corresponding to the first digit data.

[0108] Optionally, the bit width of the aging increase data of the display panel is less than or equal to a first preset bit width;

[0109] The first preset bit width satisfies: The sampling interval is the time interval for obtaining aging data, the backup interval is the preset period, and C_G255 is the maximum loss value required for a single sampling of 255 grayscales.

[0110] Generally, the bit width may be the bit width of one sub-pixel.

[0111] Among them, the sampling interval is the time interval for obtaining display data, the backup interval is the preset period, and the backup interval is the time interval for updating the historical aging data; the sampling interval and the backup interval can be set according to needs to obtain the first preset bit width; the bit width of the aging-increased data of the display panel is set to be less than or equal to the first preset bit width, which can reduce the storage bit width of the internal storage unit and reduce costs.

[0112] Optionally, within a preset period, aging is performed in sequence according to the sampling period to increase data sampling;

[0113] According to the aging increase data and the historical aging data sampled at a preset period, updated historical aging data is obtained.

[0114] Among them, the preset period is the time interval for updating the historical aging data, and a plurality of sampling periods are included in one preset period. The historical aging data of a to-be-updated area of ​​the display panel is updated in one sampling period until the historical aging data of all to-be-updated areas of the display panel are updated in a plurality of sampling periods to complete the update of one preset period. Dividing one preset period into a plurality of sampling periods to update the aging data of different areas can reduce the storage space of the internal storage unit, thereby reducing the area and cost of the DDIC or TCON.

[0115] Optionally, within a preset period, aging is performed in sequence according to a sampling period to increase data sampling.

[0116] Among them, by sequentially sampling the aging-added data of different to-be-updated areas of the display panel according to a plurality of sampling periods within a preset period, the storage space of the internal storage unit can be reduced, thereby reducing the area and cost of the DDIC or TCON.

[0117] Optionally, data sampling is increased according to aging of each frame of data of the display panel.

[0118] Among them, the current display data of the display panel at the current moment is obtained, and the current display data at the previous moment is a frame of data. The aging increase data is accumulated according to each frame of data. The aging increase data can be the sum of the number of frames corresponding to each driving data of each sub-pixel.

[0119] Optionally, updated historical aging data is obtained according to the aging increase data and the historical aging data, including:

[0120] When the remaining bit width of the aging-added data of the display panel is less than or equal to the second preset bit width, updated historical aging data is obtained according to the aging-added data and the historical aging data.

[0121] Among them, if the remaining storage bit width is less than or equal to the second preset bit width, it means that the temporary storage bit width of the aging-increased data has reached the maximum. The historical aging data needs to be updated according to the aging-increased data and the previous historical aging data. The second preset bit width can be set according to demand. Exemplarily, the storage of historical aging data has space for storing the bit width of the complete life span. If the complete bit width is 40 bits, the temporary storage bit width of the aging-increased data can be reduced to 20 bits. The temporary storage bit width of the aging-increased data is smaller than the storage bit width of the historical aging data, which can reduce costs.

[0122] Optionally, the second preset bit width is less than or equal to a set value.

[0123] The second preset bit width is used to avoid overflow of aging-increased data and data loss. For example, if the temporary storage bit width of aging-increased data is 11 bits, the second preset bit width is set to 1 bit. When the aging-increased data is fully stored at 10 bits, the historical aging data needs to be updated. By reserving 1 bit of remaining storage bit width, the overflow and loss of aging-increased data due to untimely update can be avoided.

[0124] Optional, set the value to 0 or 1.

[0125] The setting value of 0 indicates that when the remaining temporary storage bit width of the aging-added data is 0, the historical aging data is updated. This setting enables the storage bit width of the internal storage unit to be set smaller, further reducing the cost.

[0126] The setting value of 1 indicates that when the remaining temporary storage bit width of the aging-added data is 1, the historical aging data is updated. This setting allows the storage bit width of the internal storage unit to be set smaller, reducing costs while avoiding data overflow and data loss.

[0127] Optionally, based on the above embodiment, S220, obtaining updated historical aging data according to the aging increase data and the historical aging data, is specifically refined to include: S2201, reading at least part of the historical aging data with the first bit width; S2202, updating at least part of the historical aging data according to at least part of the historical aging data and the aging increase data; S2203, outputting at least part of the historical aging data; S2204, updating the remaining historical aging data in sequence according to the first bit width, and outputting.

[0128] Figure 7 is a flow chart of another display panel compensation method provided by an embodiment of the present invention, referring to Figure 7 , compensation methods also include:

[0129] S210: Obtain aging increase data of the current display panel.

[0130] S2201. Read at least part of the historical aging data with the first bit width.

[0131] Among them, the first bit width can be set according to demand, the maximum bit width of each sub-pixel is 40 bits, and the first bit width can be set to 40 bits*N, where N is the number of sub-pixels; the display panel includes at least two areas to be updated, each area to be updated includes one or more sub-pixels, and the first bit width corresponds to the bit width of an area to be updated; at least part of the historical aging data is read with the first bit width, exemplarily, the first bit width is 40 bits, and the historical aging data of a sub-pixel in the historical aging data is read; the first bit width is 40 bits*2, and the historical aging data of a sub-pixel in the historical aging data can be read, or the historical aging data of two sub-pixels in the historical aging data can be read.

[0132] S2202: Update at least part of the historical aging data according to at least part of the historical aging data and the aging increase data.

[0133] Wherein, at least part of the data of the corresponding area in the aging-added data is determined according to at least part of the historical aging data, that is, if at least part of the historical aging data is the historical aging data of the first sub-pixel of the display panel, then at least part of the data of the corresponding area in the aging-added data is the aging-added data of the first sub-pixel of the display panel; and at least part of the historical aging data and the corresponding aging-added data are accumulated to update at least part of the historical aging data.

[0134] S2203: Output at least part of the updated historical aging data.

[0135] Outputting at least part of the updated historical aging data may be understood as outputting at least part of the updated historical aging data to an external non-power-off volatile memory for storage.

[0136] S2204: Update the remaining historical aging data in sequence according to the first bit width and output them.

[0137] Among them, the remaining historical aging data is updated and outputted in sequence according to the first bit width, and the remaining areas to be updated of the display panel are updated according to the first bit width. After each update, the updated historical aging data needs to be transferred to an external non-power-off volatile memory for storage; until all areas to be updated of the display panel are updated and outputted. The remaining historical aging data is updated and outputted in sequence according to the first bit width; the historical aging data of sub-pixels in different areas to be updated are updated in sequence according to the first bit width, so that the internal storage space can be further reduced.

[0138] S230, outputting updated historical aging data; wherein the sum of the number of digits of the aging-added data and the first digit is smaller than the number of digits of the historical aging data.

[0139] S111 . Obtain first digit data corresponding to updated historical aging data.

[0140] S120 , obtaining compensation parameters of the display panel according to the first digit data and a compensation table corresponding to the first digit data.

[0141] Optionally, the first bit width is less than or equal to the storage bit width of the historical aging data.

[0142] The first bit width is less than or equal to the storage bit width of the historical aging data, which can reduce the storage space of the internal storage unit. The smaller the first bit width is set, the smaller the internal storage space can be set, and the lower the cost.

[0143] Optionally, the first bit width is the storage bit width of one pixel in the historical aging data.

[0144] The first bit width is the storage bit width of a pixel in the historical aging data, that is, the historical aging data only updates the historical aging data of one sub-pixel each time, which can reduce the internal storage space and reduce the cost. A pixel refers to a pixel unit or a sub-pixel, and the pixel unit includes a red sub-pixel, a green sub-pixel and a blue sub-pixel.

[0145] Optionally, the first bit width is the storage bit width of one or several rows of pixels in the historical aging data, and the historical aging data of one or several rows of pixels are read each time and updated and output.

[0146] in, Figure 8 is a schematic diagram of bit width division of a display panel provided by an embodiment of the present invention, Fig. 9 is another schematic diagram of bit width division of a display panel provided by an embodiment of the present invention, with reference to Figure 8 and Fig. 9 In the display panel 300, each row of pixels includes a plurality of sub-pixels 01 arranged in sequence along the row direction X, and each red frame can be a first bit width 301, referring to Figure 8 , the first bit width 301 may include several rows of pixels, or, referring to Fig. 9 The first bit width may include a row of pixels; reading the historical aging data of one or several rows of pixels each time and updating and outputting them can further reduce the internal storage space.

[0147] Optionally, S110, obtaining the first digit of the historical aging data, is specifically refined to include: S1101, obtaining the first digit of the historical aging data after every set compensation time interval.

[0148] Fig.10 is a flow chart of another display panel compensation method provided by an embodiment of the present invention, referring to Fig.10 , compensation methods include:

[0149] S1101. Obtain the first digit of historical aging data after every set compensation time interval.

[0150] The compensation time interval is the time interval between one compensation and the next compensation. The preset time interval can be set according to the compensation needs, and can be 10 minutes, 20 minutes, 30 minutes, 40 minutes, 50 minutes or 60 minutes, etc.

[0151] S120 , obtaining compensation parameters of the display panel according to the first digit data and a compensation table corresponding to the first digit data.

[0152] This embodiment performs aging compensation on the sub-pixels in the display panel at every compensation time interval. While ensuring that the display panel has a good display effect, the compensation frequency can be reduced and the difficulty of the compensation algorithm can be reduced. And by performing compensation based on the first digit of historical aging data, the compensation algorithm can be simplified and the compensation speed can be improved while ensuring the compensation effect.

[0153] For example, Fig.11 This is another schematic diagram of the brightness of a display panel, refer to Fig.11 , the horizontal axis is time, and the vertical axis is the brightness of the OLED display panel; in the prior art, compensation is performed every 1 / 60 second. Fig.12is a schematic diagram of the brightness of a display panel provided by an embodiment of the present invention, wherein the abscissa is time and the ordinate is the brightness of the OLED display panel; Fig.12 The compensation may be performed once every 1 hour, and the compensation interval may be 1 hour; thus, the power consumption may be reduced and the storage space of the storage unit may be saved.

[0154] An embodiment of the present invention provides a compensation device for a display panel based on the above embodiment, and the compensation device includes:

[0155] A first control unit is used to obtain the first digit data of the historical aging data; the first digit data is the data of the high digit of the historical aging data, and the first digit is smaller than the digit of the historical aging data;

[0156] The second control unit is used to obtain compensation parameters of the display panel according to the first digit data and the compensation table corresponding to the first digit data.

[0157] Optionally, the compensation device further comprises:

[0158] An accumulation unit, used for obtaining the aging increase data of the current display panel before obtaining the first digit of the historical aging data;

[0159] A third control unit, configured to obtain updated historical aging data according to the aging increase data and the historical aging data;

[0160] A fourth control unit is used to output updated historical aging data; wherein the sum of the number of digits of the aging-added data and the first digit is less than the number of digits of the historical aging data;

[0161] Optionally, the first control unit includes:

[0162] The first sub-control unit is used to obtain the first digit data corresponding to the updated historical aging data.

[0163] Optionally, the temporary storage bit width of the first digit data is smaller than the storage bit width of the historical aging data;

[0164] Optionally, the temporary storage bit width of the aging-increased data of the display panel is smaller than the bit width of the historical aging data;

[0165] Optionally, the sum of the temporary storage bit width of the aging increase data of the display panel and the temporary storage bit width of the first digit data is smaller than the storage bit width of the historical aging data.

[0166] Optionally, the second control unit includes:

[0167] A second sub-control unit is used to obtain the aging increase data and the historical aging data within a preset period to obtain updated historical aging data;

[0168] Optionally, the bit width of the aging increase data of the display panel is less than or equal to a first preset bit width;

[0169] The first preset bit width satisfies: Among them, the sampling interval is the time interval for obtaining aging data, the backup interval is the preset period, and C_G255 is the maximum loss value required for a single sampling of 255 grayscales;

[0170] Optionally, within a preset period, aging is performed in sequence according to the sampling period to increase data sampling;

[0171] Obtain updated historical aging data based on the aging increase data and historical aging data sampled at a preset period;

[0172] Optionally, within a preset period, aging is performed in sequence according to the sampling period to increase data sampling;

[0173] Optionally, aging is performed on each frame of data of the display panel to increase data value sampling.

[0174] Optionally, the third control unit includes:

[0175] A third sub-control unit, configured to obtain updated historical aging data according to the aging-added data and the historical aging data when the remaining bit width of the aging-added data of the display panel is less than or equal to the second preset bit width;

[0176] Optionally, the second preset bit width is less than or equal to a set value;

[0177] Optional, set the value to 0 or 1.

[0178] Optionally, the third control unit includes:

[0179] A fourth control subunit, configured to read at least a portion of the historical aging data with a first bit width;

[0180] a fifth control subunit, configured to update at least a portion of the historical aging data according to at least a portion of the historical aging data and the aging increase data;

[0181] a sixth control subunit, outputting at least a portion of the updated historical aging data;

[0182] The seventh control subunit updates the remaining historical aging data in sequence according to the first bit width and outputs it;

[0183] Optionally, the first bit width is less than or equal to the storage bit width of the historical aging data;

[0184] Optionally, the first bit width is the storage bit width of one pixel in the historical aging data;

[0185] Optionally, the first bit width is the storage bit width of one or several rows of pixels in the historical aging data, and the historical aging data of one or several rows of pixels are read each time and updated and output.

[0186] Optionally, the first control unit includes:

[0187] The eighth sub-control unit is used to obtain the first digit of the historical aging data of each sub-pixel after every set compensation time interval.

[0188] in, Fig.15 is a schematic diagram of an aging compensation device for a display panel provided by an embodiment of the present invention, with reference to Fig.15 , the compensation device includes a memory 100 and an aging compensation module 200; the aging compensation module 200 includes a control unit 10, an accumulation unit 23, a first storage unit 21 and a second storage unit 22; all control units in the compensation device are a control unit 10, and the control unit 10 is used to obtain the current display data of the display panel at the current moment;

[0189] The accumulation unit 23 accumulates the current display data and the accumulated aging data of each sub-pixel stored in the first storage unit 21 to obtain aging increase data, and temporarily stores the aging increase data in the first storage unit 21; wherein the accumulated aging data is the accumulated sum of multiple frames of display data between the historical moment and the current moment;

[0190] The control unit 10 reads the first digit data of the historical aging data from the memory 100, temporarily stores it in the second storage unit 22, updates the historical aging data according to the aging increase data of the accumulation unit 23, and stores the updated historical aging data in the memory 100, wherein the historical aging data is determined according to all display data of the sub-pixel before the historical moment.

[0191] The memory 100 may be a non-power-off volatile memory, for example, the memory 100 may be a SPI flash memory; the accumulator 23 may be a patrol data accumulator, and the first storage unit 21 and the second storage unit 22 may be an embedded static random access memory or a synchronous dynamic random access memory. The aging compensation module 200 may be an independent compensation module or may be integrated in a DDIC or a TCON.

[0192] The first storage unit 21 stores aging increase data, which is the cumulative sum of multiple frames of display data between the historical moment and the current moment. The historical moment to the current moment includes multiple moments, each moment has a frame, and each frame has a set of display data. The display data in each frame is accumulated through the accumulation unit 23, and the accumulation result is stored in the first storage unit 21.

[0193] refer to Figure 1 In the prior art, both the memory 100 and the storage unit 20 need to completely store the aging data of each sub-pixel of the entire display panel, that is, both the memory 100 and the storage unit 20 need to store the aging data accumulated from all display data of each sub-pixel before the historical moment and from the historical moment to the current moment. In the embodiment of the present invention, the first storage unit 21 stores the aging increase data of each sub-pixel from the historical moment to the current moment, and the second storage unit 22 is used for the first digit data of the historical aging data of each sub-pixel before the historical moment. Therefore, the storage space of the first storage unit 21 and the second storage unit 22 in the embodiment of the present invention is small, which can reduce the space of the storage unit in the aging compensation module, thereby reducing the area and cost of DDIC or TCON. And because the amount of stored data is small, the compression rate of the stored data can be reduced, and the effect of aging compensation can be improved. And if the space requirement in the prior art is 30M, the space requirement in the embodiment of the present invention can be reduced to 15M, and the space estimate can save 50%.

[0194] The control unit 10 reads at least part of the historical aging data with the first bit width; stores the data in the second storage unit 22 after each reading, and updates the historical aging data in the second storage unit 22 according to the corresponding aging increase data in the first storage unit 21 after each storage, and stores the updated historical aging data in the memory 100 until all the historical aging data are updated and stored in the memory 100;

[0195] The control unit 10 is used to obtain the first digit data of the historical aging data of each sub-pixel from the memory 100 after each set compensation time interval based on the first digit data of the historical aging data in the memory, temporarily store the first digit data of the historical aging data in the second storage unit 22, and determine the compensation value of the sub-pixel according to the first digit data of the historical aging data corresponding to each sub-pixel, thereby determining the compensation parameter of the display panel.

[0196] The control unit 10 is also used to update the historical aging data according to the aging increase data in the first storage unit 21 and the historical aging data in the second storage unit 22 each time, store the updated historical aging data in the memory 100, and clear the corresponding aging increase data in the first storage unit 21.

[0197] Among them, the control unit 10 updates the second storage unit 22 with the first bit width, clears the corresponding aging-added data in the first storage unit 21, and after the aging-added data in the first storage unit 21 is partially cleared, new aging data is written. Clearing and writing can be performed at the same time, which can speed up the processing time and cycle of data update, so that the first storage unit 21 can be further reduced.

[0198] The accumulating unit 23 is used to send prompt information to the control unit 10 when the remaining storage bit width of the first storage unit 21 is less than the preset bit width;

[0199] The control unit 10 is used to update the historical aging data in the second storage unit 22 according to the corresponding aging increase data in the first storage unit 21 after receiving the prompt information.

[0200] Among them, the accumulation unit 23 is used to accumulate the current display data and the accumulated aging data of each sub-pixel stored in the first storage unit 21 to obtain aging increase data, and temporarily store the aging increase data in the first storage unit 21. When the accumulation unit 23 determines that the remaining storage bit width of the first storage unit 21 is less than the preset bit width, it sends a prompt message to the control unit 10. After receiving the information, the control unit 10 performs a corresponding operation to update the historical aging data in the second storage unit 22 according to the corresponding aging increase data in the first storage unit 21, thereby reducing the storage space of the first storage unit 21.

[0201] The aging compensation module 200 further includes an access controller 30 ; the control unit 10 reads the first bit of the historical aging data in the memory 100 through the access controller 30 , and writes data into the memory 100 through the access controller 30 .

[0202] Among them, the control unit 10 controls the memory 100 to read the first digit data of the historical aging data in the memory 100 through the access controller 30; and the control unit 10 updates the historical aging data according to the aging increase data and the historical aging data in the first storage unit 21, and stores the updated historical aging data in the memory 100 through the access controller 30.

[0203] The memory 100 is a flash memory; the first storage unit 21 and the second storage unit 22 are both static random access memories.

[0204] Among them, the memory 100 is a flash memory, which is a non-volatile memory that can keep data from being lost after power failure; the first storage unit 21 and the second storage unit 22 are both static random access memories, which have extremely fast read and write speeds.

[0205] The aging compensation module is integrated into the driver chip of the display panel.

[0206] The aging compensation module is integrated in the driver chip of the display panel to compensate each sub-pixel to ensure the display effect of the display panel.

[0207] The display data includes the position and driving data of each sub-pixel.

[0208] The position of each sub-pixel is the position of each sub-pixel in the display panel, and the driving data of each sub-pixel is used to drive the sub-pixel to emit light.

[0209] The aging data includes the position and driving data of each sub-pixel, and the luminous duration corresponding to each driving data, or the aging data includes the position and luminous duration of each sub-pixel, or the aging data includes the position and luminous frame number of each sub-pixel.

[0210] The position of each sub-pixel is the position of each sub-pixel in the display panel, and the driving data of each sub-pixel is used to drive the sub-pixel to emit light. Each sub-pixel may include two or more different driving data, and the aging degree of each sub-pixel can be determined according to the driving data and the light emission duration corresponding to each driving data, thereby determining the compensation value.

[0211] The number of luminous frames refers to the number of frames of the picture displayed by the sub-pixel when driven by the driving data corresponding to the number of luminous frames. The luminous duration refers to the duration of the picture displayed by the sub-pixel when driven by the driving data corresponding to the luminous duration. When the memory stores the normalized luminous duration or number of luminous frames, the aging data does not need to include the driving data. The normalized luminous duration refers to the total luminous duration obtained by normalizing the luminous duration under all driving data. The normalized number of luminous frames refers to the total number of luminous frames obtained by normalizing the luminous frame numbers under all driving data.

[0212] For example, in the prior art, Fig.14 This is a timing diagram of an aging compensation device for a display panel. Figure 1 and Fig.14 , the control unit 10 inside the DDIC or TCON will perform a data write (Write) action with a fixed width for backup. All data needs to be written into the memory 100. If the maximum bit width of each sub-pixel is 40 bits, the maximum bit width of the data written into the memory 100 can be 40*3RGB bit*X, where X is the size of the screen resolution; reset_n is a reset signal, SPI I / F is a memory signal, SRAM I / F is a memory control signal, and DE is the display data of each line in a frame. Fig.15 is a timing diagram of an aging compensation device for a display panel provided by an embodiment of the present invention, with reference to Fig.13 and Fig.15The control unit in the embodiment of the present invention will perform data writing and backup in a patrol mechanism of reading first and writing later. First, the high-order data in the area to be updated in the memory 100 is read out (Read) to the second storage unit 22, and the high-order data of the historical aging data in the second storage unit 22 is updated according to the accumulated result corresponding to the sub-pixel in the area to be updated in the first storage unit 21, and the updated high-order data is written (Write) to the memory 100, the space of the first storage unit 21 is released, and the next area to be updated is patrolled to update the data. The mechanism of increasing frequency and reducing bandwidth is used to reduce the reservation of temporary storage space. After the data is read in, the data is updated and written out. If it does not need to be updated, the first storage unit 21 is used for storage.

[0213] An embodiment of the present invention provides a display device based on the above embodiment, including the compensation device described in any embodiment of the present invention.

[0214] The display device provided by the embodiment of the present invention has the same beneficial effects as the compensation device described in any embodiment of the present invention.

[0215] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0216] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A compensation method for a display panel, characterized in that: include: Get the first digit of historical aging data; The first digit data is the data of the higher digit of the historical aging data, and the first digit is smaller than the digit of the historical aging data; A compensation parameter of the display panel is obtained according to the first-bit data and a compensation table corresponding to the first-bit data.

2. The compensation method according to claim 1, characterized in that: Before obtaining the first digit of historical aging data, it also includes: Obtain the aging increase data of the current display panel; Obtaining updated historical aging data according to the aging increase data and the historical aging data; Outputting updated historical aging data; wherein the sum of the number of digits of the aging-added data and the first number of digits is less than the number of digits of the historical aging data; Preferably, obtaining the first digit of historical aging data includes: Get the first digit data corresponding to the updated historical aging data.

3. The compensation method according to claim 2, characterized in that: The temporary storage bit width of the first-digit data is smaller than the storage bit width of the historical aging data; Preferably, the temporary storage bit width of the aging increase data of the display panel is smaller than the bit width of the historical aging data; Preferably, the sum of the temporary storage bit width of the aging increase data of the display panel and the temporary storage bit width of the first bit data is smaller than the storage bit width of the historical aging data.

4. The compensation method according to claim 2, characterized in that: According to the aging increase data and the historical aging data, updated historical aging data is obtained, including: Acquire the aging increase data and the historical aging data within a preset period to obtain updated historical aging data; Preferably, the bit width of the aging increase data of the display panel is less than or equal to the first preset bit width; The first preset bit width satisfies: Among them, the sampling interval is the time interval for obtaining aging data, the backup interval is the preset period, and C_G255 is the maximum loss value required for a single sampling of 255 grayscales; preferably, within the preset period, the aging increase data sampling is performed in sequence according to the sampling period; Obtaining updated historical aging data according to the aging increase data sampled in the preset period and the historical aging data; Preferably, within the preset period, aging and increasing data sampling are performed sequentially according to the sampling period; Preferably, the aging-increased data value sampling is performed according to each frame of data of the display panel.

5. The compensation method according to claim 2, characterized in that: According to the aging increase data and the historical aging data, updated historical aging data is obtained, including: When the remaining bit width of the aging-added data of the display panel is less than or equal to the second preset bit width, obtaining updated historical aging data according to the aging-added data and the historical aging data; Preferably, the second preset bit width is less than or equal to a set value; Preferably, the set value is 0 or 1.

6. The compensation method according to claim 2, characterized in that: According to the aging increase data and the historical aging data, updated historical aging data is obtained, including: reading at least a portion of the historical aging data with a first bit width; updating the at least part of the historical aging data according to the at least part of the historical aging data and the aging increase data; Outputting the updated at least part of the historical aging data; updating the remaining historical aging data in sequence according to the first bit width, and outputting the data; Preferably, the first bit width is less than or equal to the storage bit width of the historical aging data; Preferably, the first bit width is the storage bit width of one pixel in the historical aging data; Preferably, the first bit width is the storage bit width of one or several rows of pixels in the historical aging data, and the historical aging data of one or several rows of pixels are read each time and updated and output.

7. The compensation method according to claim 1, characterized in that: Get the first digit of historical aging data, including: After each set compensation time interval, the first digit of the historical aging data of each sub-pixel is obtained.

8. A compensation device for a display panel, characterized in that: include: A first control unit, used for obtaining the first digit of historical aging data; The first digit data is the data of the higher digit of the historical aging data, and the first digit is smaller than the digit of the historical aging data; The second control unit is used to obtain compensation parameters of the display panel according to the first-bit data and a compensation table corresponding to the first-bit data.

9. The compensation device according to claim 8, characterized in that: The compensation device also includes: An accumulation unit, used for obtaining the aging increase data of the current display panel before obtaining the first digit of the historical aging data; A third control unit, configured to obtain updated historical aging data according to the aging increase data and the historical aging data; A fourth control unit, configured to output updated historical aging data; wherein the sum of the number of digits of the aging-added data and the first number of digits is less than the number of digits of the historical aging data; Preferably, the first control unit comprises: Get the first digit data corresponding to the updated historical aging data.

10. A display device, characterized in that: Comprising the compensation device as described in any one of claims 8-9.

Images