Display panel compensation method, compensation device, display panel, and memory

Abstract

The present application provides a display panel compensation method, a compensation device, a display panel and a memory. The compensation method includes: obtaining a corresponding brightness decay efficiency table based on the cumulative lighting time; obtaining the corresponding brightness decay efficiency based on the display gray level of each sub-pixel in the display panel; updating the total cumulative brightness decay efficiency based on the brightness decay efficiency of each sub-pixel; obtaining a compensation gray level based on the updated total cumulative brightness decay efficiency of each sub-pixel; and compensating the sub-pixels based on the compensation gray level of each sub-pixel. The present application improves the calculation accuracy of the decay efficiency and enhances the aging compensation effect by establishing multiple decay efficiency tables instead of the decay efficiency formula.

Description

Technical Field

[0001] This application belongs to the field of display technology, and particularly relates to a display panel compensation method, a compensation device, a display panel, and a memory. Background Art

[0002] In an OLED (organic light-emitting diode) display panel, organic light-emitting materials are used as its red sub-pixels, green sub-pixels, and blue sub-pixels. When the sub-pixels are lit for a long time and at a high brightness, the organic light-emitting materials will age, resulting in a decrease in their luminous efficiency. As a result, the sub-pixels cannot reach the specified brightness under the same driving current. Due to differences in the aging degree of each sub-pixel, the OLED display panel eventually exhibits brightness non-uniformity and chromaticity non-uniformity. Summary of the Invention

[0003] This application provides a display panel compensation method, a compensation device, a display panel, and a memory to solve the technical problem that the preset attenuation efficiency formula cannot accurately characterize the change of the attenuation rate over time, resulting in poor aging compensation effect.

[0004] To solve the above technical problem, one technical solution adopted in this application is: a display panel compensation method, including the following steps: obtaining the cumulative lighting time of the display panel, and obtaining a brightness decay efficiency table corresponding to the cumulative lighting time based on the cumulative lighting time; wherein, the display panel includes sub-pixels with multiple preset display gray levels, and the brightness decay efficiency table includes the brightness decay efficiency of the sub-pixels when displaying each preset display gray level at the current cumulative lighting time relative to the brightness at the time node before the current cumulative lighting time.

[0005] Obtaining the corresponding brightness decay efficiency based on the display gray level and the brightness decay efficiency table of each sub-pixel in the display panel.

[0006] Updating the cumulative total brightness decay efficiency based on the brightness decay efficiency of each sub-pixel and the current cumulative total brightness decay efficiency.

[0007] Obtaining a compensation gray level based on the updated cumulative total brightness decay efficiency of each sub-pixel.

[0008] Compensating the sub-pixels based on the compensation gray level of each sub-pixel.

[0009] Further, the step of obtaining a brightness decay efficiency table corresponding to the cumulative lighting time based on the cumulative lighting time includes:

[0010] Judging whether there is a brightness decay efficiency table corresponding to the cumulative lighting time stored;

[0011] If so, retrieving and obtaining the brightness decay efficiency table corresponding to the cumulative lighting time;

[0012] Otherwise, retrieve the first time node that is closest to and before the cumulative lighting time, and retrieve the second time node that is closest to and after the cumulative lighting time; obtain a brightness decay efficiency table corresponding to the cumulative lighting time based on the first time node and the second time node.

[0013] Further, the step of obtaining the updated cumulative brightness decay total efficiency based on the brightness decay efficiency of each sub-pixel and the current cumulative brightness decay total efficiency includes:

[0014] Obtain the sum of the brightness decay efficiency of each sub-pixel and the current cumulative brightness decay total efficiency, and use the sum as the updated cumulative brightness decay total efficiency.

[0015] Further, before the step of obtaining the cumulative lighting time of the display panel and obtaining a brightness decay efficiency table corresponding to the cumulative lighting time based on the cumulative lighting time, it includes: for each color sub-pixel, obtain the gray-scale brightness values corresponding to different time nodes under each preset display gray scale;

[0016] For any two adjacent time nodes under each preset display gray scale, obtain the difference between the two adjacent time nodes, and use the difference as the gray-scale brightness attenuation value corresponding to the time node of the latter of the two adjacent time nodes;

[0017] Obtain a corresponding brightness decay efficiency table based on the gray-scale brightness attenuation values under different preset display gray scales corresponding to the same time node;

[0018] Preferably, the step of obtaining a corresponding brightness decay efficiency table based on the gray-scale brightness attenuation values under different preset display gray scales corresponding to the same time node includes: obtaining the gray-scale brightness attenuation values under different preset display gray scales corresponding to the same time node, and performing normalization processing to obtain the brightness decay efficiency table.

[0019] Further, the method for obtaining the corresponding brightness decay efficiency based on the display gray scale of each sub-pixel and the brightness decay efficiency table includes the following steps:

[0020] Determine whether there is a stored brightness decay efficiency corresponding to the display gray scale;

[0021] If so, retrieve the brightness decay efficiency corresponding to the display gray scale;

[0022] Otherwise, retrieve the luminance decay efficiency of the first gray scale that is closest to and before the display gray scale, and retrieve the luminance decay efficiency of the second gray scale that is closest to and after the display gray scale; obtain the luminance decay efficiency corresponding to the display gray scale based on the luminance decay efficiency of the first gray scale and the luminance decay efficiency of the second gray scale.

[0023] Furthermore, the method for obtaining the compensated gray scale includes the following steps:

[0024] Obtain an aging compensation table based on multiple preset total decay efficiencies and the gray scale compensation values corresponding to each preset total decay efficiency;

[0025] Obtain the compensated gray scale based on the aging compensation table and the updated cumulative total luminance decay efficiency.

[0026] Furthermore, the method for obtaining the compensated gray scale based on the aging compensation table and the updated cumulative total luminance decay efficiency includes the following steps:

[0027] Determine whether there is an aging compensation table corresponding to the updated cumulative total luminance decay efficiency stored;

[0028] If so, retrieve the aging compensation table corresponding to the updated cumulative total luminance decay efficiency;

[0029] Otherwise, retrieve the aging compensation table of the first total luminance decay efficiency that is closest to and before the updated cumulative total luminance decay efficiency, and retrieve the aging compensation table of the second total luminance decay efficiency that is closest to and after the updated cumulative total luminance decay efficiency; obtain the aging compensation table corresponding to the updated cumulative total luminance decay efficiency based on the aging compensation table of the first total luminance decay efficiency and the aging compensation table of the second total luminance decay efficiency.

[0030] Another technical solution adopted by this application is: a display panel compensation device, including a display module, a storage module, a timing module, and a compensation module;

[0031] The display module is used to display an image and obtain the display gray scale of each sub-pixel;

[0032] The storage module is used to record and store the luminance decay efficiency table obtained from the aging test, the integrated aging compensation table, and the updated cumulative total luminance decay efficiency;

[0033] The timing module is used to obtain the cumulative lighting time of the display panel;

[0034] The compensation module is used to calculate the compensated gray scale of the sub-pixel and generate an image compensation signal.

[0035] Another technical solution adopted by this application is: to provide a display panel, including a memory and a processor coupled to each other. Program instructions are stored in the memory, and the processor is configured to execute the program instructions to implement the above-mentioned display panel compensation method.

[0036] Another technical solution adopted by this application is: to provide a memory that stores instructions. When the memory runs on a computer, it causes the computer to execute the above-mentioned display panel compensation method.

[0037] Different from the prior art, the beneficial effect of this application is that: by establishing multiple brightness attenuation efficiency tables to replace the attenuation efficiency formula, this application improves the calculation accuracy of the attenuation efficiency and enhances the aging compensation effect. Moreover, according to the attenuation efficiency characteristics of sub-pixels with different emission colors, multiple mapping tables can be used to record the attenuation efficiency of sub-pixels with different emission colors at different times, improving the accuracy of the aging model. Then, based on the cumulative lighting time, the total brightness attenuation efficiency corresponding to it is found to obtain the compensation gray level, enhancing the aging compensation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the embodiments of this application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of this application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings, where:

[0039] Figure 1 is a schematic flowchart of the compensation method for uneven aging of the display panel of this application;

[0040] Figure 2 is Figure 1 a schematic flowchart of a previous embodiment before step S1 in ;

[0041] Figure 3 is a schematic flowchart of an embodiment of the aging test of this application;

[0042] Figure 4 is Figure 1 a schematic flowchart of querying the cumulative lighting time in ;

[0043] Figure 5 is Figure 1 a flowchart of obtaining the brightness decay efficiency in ;

[0044] Figure 6 is Figure 1 a flowchart of obtaining the gray level compensation value in ;

[0045] Figure 7 is a schematic structural diagram of an embodiment of a compensation device for uneven aging of a display panel in this application;

[0046] Figure 8 This is a schematic structural diagram of an embodiment of a display panel in the present application. Detailed implementation manners

[0047] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0048] Refer to Figure 1 , Figure 1 This is a schematic flowchart of a compensation method for uneven aging of the display panel in the present application. This compensation method can be applied to a compensation device for the display panel. The display panel may include a plurality of sub-pixels with different colors. For example, the display panel includes a plurality of red sub-pixels, a plurality of blue sub-pixels, a plurality of green sub-pixels, etc.; the compensation method includes the following steps:

[0049] Step S1: Obtain the cumulative lighting time of the display panel, and obtain a brightness decay efficiency table corresponding to the cumulative lighting time based on the cumulative lighting time; wherein, the display panel includes sub-pixels provided with a plurality of preset display gray levels, and the brightness decay efficiency table includes the brightness decay efficiency of the sub-pixels when displaying each preset display gray level at the current cumulative lighting time relative to the brightness at the time node before the current cumulative lighting time.

[0050] Specifically, the cumulative lighting time of the display panel is the total lighting time of the display panel from the first lighting moment to the current; generally, a timing module is provided inside the display panel, and the cumulative lighting time can be directly obtained through the timing module. In addition, a brightness decay efficiency table corresponding to a plurality of different time nodes may be pre-stored in the storage template inside the display panel.

[0051] Further, the process of pre-storing the brightness decay efficiency tables corresponding to a plurality of different sampling times may be: for each color of sub-pixels, obtain the gray level brightness values corresponding to different time nodes at each preset display gray level.

[0052] Specifically, please refer to Figure 2 , Figure 2 is Figure 1 a schematic flowchart of an embodiment before step S1 in

[0053] S101: Select multiple preset display gray levels for a single sub-pixel. Based on the gray level brightness at each time node under the multiple preset display gray levels, obtain the difference between the gray level brightness at the current time node and the gray level brightness at the previous time node, and use the difference in gray level brightness as the gray level brightness attenuation value corresponding to the current time node.

[0054] This step is used to obtain a relationship correspondence table between each gray level brightness attenuation value and the time node.

[0055] S102: Obtain a corresponding brightness decay efficiency table based on the gray level brightness attenuation values under different preset display gray levels corresponding to the same time node.

[0056] Specifically, that is, correspond the obtained difference in gray level brightness with the interval of the time node. At this time, the implementation process of the above step S102 can be: obtain the gray level brightness attenuation values under different preset display gray levels corresponding to the same time node, and perform normalization processing to obtain the brightness decay efficiency table. This method can normalize the obtained relationship correspondence table between multiple gray level brightness attenuation values and the time node to obtain the brightness decay efficiency table.

[0057] Refer to Figure 3 , Figure 3 , which is a schematic flow diagram of an implementation manner of the aging test of this application. In one embodiment, the aging experiment on the display panel includes the following steps:

[0058] Step 1: Select sub-pixels of three colors, R / G / B, for measurement, and select M gray levels and n + 1 time nodes.

[0059] Step 2: First, select the sub-pixels of R color for the experiment, and record the time nodes as T0, T1, T2…T n+1 , and M gray level brightness values L0~L m ; This step is used to obtain the brightness of each gray level corresponding to the time node.

[0060] Exemplarily, in Step 2, T0 is 0, T1 is 200h, T2 is 400h,, when the gray levels are 16, 32, 64, 128, 192, 255, the relationship between the time node and the brightness is obtained as shown in Table 1.

[0061] Table 1 Relationship between Gray Level Brightness and Time

[0062]

[0063] Among them, there is a brightness decay efficiency table corresponding to each time node between multiple preset display gray levels. Multiple time nodes can correspond to multiple brightness decay efficiency tables, which is convenient for statistically comparing the brightness decay situation.

[0064] Step 3: Subtract the corresponding brightness values of the M gray levels at the next time node T n from the corresponding brightness values of the M gray levels at the previous time node T n+1 For example, subtract the gray level brightness at time T0 from the gray level brightness at time T1. A total of M gray level brightness attenuation values ΔL1 to ΔL m are obtained; this step can count the brightness decay values between adjacent time nodes.

[0065] Exemplarily, referring to Table 1, subtract the brightness values of each gray level at time node T1 from the brightness values of each gray level at time node T0, and subtract the brightness values of each gray level at time node T2 from the brightness values of each gray level at time node T0, to obtain the relationship between the brightness attenuation values and the time nodes in the brightness decay efficiency table as shown in Table 2.

[0066] Table 2 Relationship between gray level brightness attenuation value and time

[0067]

[0068] Step 4: Normalize the brightness attenuation values ΔL1 to ΔL m in Step 2 to obtain a brightness decay efficiency table. For example, between time node T0 and time node T1, obtain the brightness attenuation table 1; between time node T n and time node T n+1 , obtain the brightness decay efficiency table n, until time node T n+1 , a total of n brightness decay efficiency tables are obtained.

[0069] Among them, normalize Table 1 and Table 2 to obtain Table 3.

[0070] Table 3 Relationship between gray level brightness decay efficiency and time

[0071]

[0072] Step 5: According to the methods in Steps 1-4, multiple brightness decay efficiency tables corresponding to the sub-pixels of the G / B color can be obtained.

[0073] Among them, all the brightness decay efficiency tables obtained from the above aging test are stored in the storage module, so that when the display panel is used, the brightness decay efficiency table can be queried and retrieved in real time for gray level compensation.

[0074] Refer to Figure 4 , Figure 4 which is Figure 1 the flow schematic diagram for querying the cumulative lighting time in. In Step S1, the step of obtaining the brightness decay efficiency table corresponding to the cumulative lighting time based on the cumulative lighting time includes:

[0075] Step S11: Determine whether there is a brightness decay efficiency table corresponding to the cumulative lighting time stored.

[0076] Specifically, determine whether the cumulative lighting time is the same as a certain time node.

[0077] Step S12: If the cumulative lighting time is the same as a certain time node, then retrieve the brightness decay efficiency table corresponding to the cumulative lighting time t1.

[0078] In one embodiment, if the cumulative lighting time is exactly at a certain time node T n+1 , then directly query to obtain the brightness decay efficiency table corresponding to the time node T n+1 .

[0079] Step S13: If the cumulative lighting time is not the same as any time node, then retrieve the first time node T that is closest to the cumulative lighting time and before the cumulative lighting time n , and retrieve the second time node T that is closest to the cumulative lighting time and after the cumulative lighting time n+1 ; Based on the first time node T n and the second time node T n+1 to obtain the brightness decay efficiency table n corresponding to the cumulative lighting time; By obtaining the front and back time nodes adjacent to the cumulative lighting time, judge the brightness efficiency decay table corresponding to the cumulative lighting time.

[0080] In one embodiment, the implementation process of the above step S13 can be: the current cumulative lighting time t1 is between the time node T3 and the time node T4, that is, T3 < t1 < T4, then query the brightness decay efficiency table corresponding between the time node T3 and the time node T4, and then obtain the brightness decay efficiency table corresponding to the cumulative lighting time t1.

[0081] Step S2: Obtain the corresponding brightness decay efficiency based on the display gray level of each sub-pixel in the display panel and the brightness decay efficiency table.

[0082] This step can detect the display gray level of a sub-pixel in the panel, query each brightness decay efficiency table stored in the above test and stored in the storage module, obtain the brightness decay efficiency table at this moment, and obtain the brightness decay efficiency of a sub-pixel through this brightness decay efficiency table, which is convenient for calculating gray level compensation.

[0083] Refer to Figure 5 , Figure 5 For Figure 1 is the flow schematic diagram for obtaining the brightness decay efficiency. Step S2 includes the following steps:

[0084] Step S21: Determine whether there is a stored brightness decay efficiency corresponding to the display gray level. Specifically, based on the current cumulative lighting time t1, a brightness decay efficiency table for all preset display gray levels at this moment is obtained. By comparing the display gray level with all preset display gray levels, it is determined whether the display gray level is the same as a certain preset display gray level.

[0085] Step S22: If the display gray level is the same as a certain preset display gray level, then retrieve the brightness decay efficiency of this preset gray level, so as to obtain the brightness decay efficiency corresponding to the display gray level.

[0086] Specifically, if the display gray level is exactly the same as the gray level value of a certain preset display gray level, then directly obtain the brightness decay efficiency corresponding to this preset display gray level as the brightness decay efficiency of the display gray level.

[0087] Step S23: If the display gray level is not the same as any of the preset display gray levels, then retrieve the brightness decay efficiency of the first gray level that is closest to the display gray level and before the display gray level, and retrieve the brightness decay efficiency of the second gray level that is closest to the display gray level and after the display gray level; based on the brightness decay efficiency of the first gray level and the brightness decay efficiency of the second gray level, obtain the brightness decay efficiency corresponding to the display gray level. In this step, by obtaining the preset display gray levels adjacent to the display gray level before and after and their corresponding brightness decay efficiencies, the brightness decay efficiency of the display gray level is obtained through linear calculation.

[0088] Specifically, the implementation process of the above step S23 can be: based on the preset display gray levels and the corresponding brightness decay efficiencies in the brightness decay efficiency table, a fitting curve of the current gray level value - brightness decay efficiency relationship can be obtained.

[0089] The brightness decay efficiency of the display gray level can obtain the corresponding actual brightness decay efficiency through this fitting curve of the gray level value - brightness decay efficiency relationship, that is, the actual brightness decay efficiency is calculated through the linear difference between the brightness decay efficiency of the first gray level and the brightness decay efficiency of the second gray level.

[0090] Specifically, if the gray level value of the display gray level is a, the gray level value of the first gray level before the display gray level is b, and the gray level value of the second gray level before the display gray level is c. Among them, according to the current cumulative lighting time t1, the current brightness decay efficiency table can be queried, and the table contains the brightness decay values corresponding to the first gray level and the second gray level.

[0091] Furthermore, query the brightness decay efficiency table to obtain the brightness decay efficiency corresponding to the first gray level as ΔL b , the brightness decay efficiency corresponding to the first gray level is ΔL c , then the actual brightness decay efficiency ΔL a of the current display gray level is band ΔL c In the linear interpolation, the specific formula is as follows:

[0092]

[0093] According to formula (1), the actual brightness decay efficiency ΔL of the display gray level can be calculated a .

[0094] Furthermore, when the gray level value of the display gray level is the same as that of the first gray level, that is, a is equal to b, the actual brightness decay efficiency ΔL of the display gray level can be obtained according to formula (1) a is equal to the brightness decay efficiency ΔL corresponding to the first gray level b .

[0095] Step S3: Update the total cumulative brightness decay efficiency based on the brightness decay efficiency of each sub-pixel and the current total cumulative brightness decay efficiency

[0096] This step can obtain the current total brightness decay efficiency in real time, which is used to superimpose the just obtained brightness decay efficiency, so as to facilitate the calculation of the new total brightness decay efficiency of the row and ensure the accuracy of gray level compensation

[0097] Referring to Table 4, step S3 includes:

[0098] Obtain the sum of the brightness decay efficiency of each sub-pixel and the current total cumulative brightness decay efficiency, and use the sum as the updated total cumulative brightness decay efficiency. This step can update and obtain the total cumulative brightness decay efficiency in real time, which is convenient for the next calculation of gray level compensation

[0099] Specifically, the total cumulative brightness decay efficiency obtained in the above step is equal to the total brightness decay value count. Since the interval time between each time node can be recorded as a unit time, and the decay efficiency is the ratio of the brightness decay value of a sub-pixel to the unit time within the unit time, the brightness decay value count within the current time can be equivalent to the brightness decay efficiency. Therefore, the total cumulative brightness decay efficiency of a sub-pixel can be equivalent to its total brightness decay value count

[0100] In one embodiment, the sub-pixel has been displayed with the same gray level value from the beginning. If the current cumulative lighting time t1 is less than T1, it can be considered that the current total cumulative brightness decay efficiency is zero. At this time, the total cumulative brightness decay efficiency is the brightness decay efficiency of this gray level at t1. In another embodiment, if the current cumulative lighting time t1 is greater than T1 and less than T2, the current total cumulative brightness decay efficiency is the brightness decay efficiency between T1 and T2. The decay efficiency plus the brightness decay efficiency corresponding to t1 at this time is updated as the total cumulative brightness decay efficiency. At the same time, the updated total cumulative brightness decay efficiency is stored in the storage template

[0101] Step S4: Obtain a compensated gray level based on the updated total cumulative brightness decay efficiency of each sub-pixel.

[0102] This design can query the aging compensation table through the total cumulative brightness decay efficiency, facilitating the calculation of the gray level compensation value of this sub-pixel.

[0103] Refer to Figure 6 , Figure 6 For Figure 1 the flowchart for obtaining the gray level compensation value in

[0104] Obtain the aging compensation table based on multiple preset decay total efficiencies and the gray level compensation values corresponding to each preset decay total efficiency; according to the prior art, each preset decay total efficiency and its corresponding gray level compensation value can be obtained, and the relationship between the two is summarized in the aging compensation table and stored in the display panel.

[0105] Exemplarily, the corresponding relationship between the preset decay total efficiency and the gray level compensation value is shown in Table 4.

[0106] Table 4 Relationship between the preset decay total efficiency and the gray level compensation value

[0107] Total decline efficiency 0 1000 2000 3000 4000 Gray scale compensation value 0 1 1.5 2 3

[0108] Obtain the compensated gray level based on the aging compensation table obtained in the above steps and the updated total cumulative brightness decay efficiency in Step S3. The method of Step S4 includes the following steps:

[0109] Step S41: Determine whether there is a stored gray level compensation value corresponding to the total cumulative brightness decay efficiency; according to the aging compensation table, the gray level compensation value of the total cumulative brightness decay efficiency can be queried to determine whether the total cumulative brightness decay efficiency is the same as a certain preset decay total efficiency.

[0110] Step S42: If the total cumulative brightness decay efficiency is the same as a certain preset decay total efficiency, then retrieve the aging compensation table corresponding to the updated total cumulative brightness decay efficiency; if the total cumulative brightness decay efficiency is exactly the same as a certain preset decay total efficiency in the aging compensation table, then the gray level compensation value corresponding to this preset decay total efficiency at this time is the compensated gray level corresponding to the total cumulative brightness decay efficiency.

[0111] Step S43: If the cumulative luminance decay total efficiency is the same as any of the preset decay total efficiencies, then retrieve the gray-scale compensation value of the first luminance decay total efficiency that is closest to and before the updated cumulative luminance decay total efficiency, and retrieve the gray-scale compensation value of the second luminance decay total efficiency that is closest to and after the updated cumulative luminance decay total efficiency; obtain the gray-scale compensation value corresponding to the updated cumulative luminance decay total efficiency based on the gray-scale compensation value of the first luminance decay total efficiency and the gray-scale compensation value of the second luminance decay total efficiency.

[0112] Specifically, the implementation process of the above step S43 can be as follows: Based on the preset decay total efficiencies and the corresponding gray-scale compensation values in the above aging compensation table, the fitting curve of the current decay total efficiency - decay total efficiency relationship can be obtained.

[0113] The updated cumulative luminance decay total efficiency in step S3 can obtain the corresponding gray-scale compensation value through the fitting curve of the decay total efficiency - decay total efficiency relationship based on the corresponding gray-scale compensation value, that is, the actual gray-scale compensation value is calculated through the linear difference between the gray-scale compensation value of the first luminance decay total efficiency and the gray-scale compensation value of the second luminance decay total efficiency.

[0114] Exemplarily, if the updated cumulative luminance decay total efficiency is x, and the gray-scale compensation value corresponding to x is K x ; the first luminance decay total efficiency is y, then the gray-scale compensation value corresponding to y is K y ; the second luminance decay total efficiency is z, then the gray-scale compensation value corresponding to z is K z ; then when the updated cumulative luminance decay total efficiency K x is between K x and K z in the linear difference, the specific formula is:

[0115]

[0116] According to formula (2), the gray-scale compensation value K of the updated cumulative luminance decay total efficiency can be calculated. x .

[0117] Further, if the updated cumulative luminance decay total efficiency is the same as the first luminance decay total efficiency, that is, x is equal to y, then according to formula (2), the actual luminance decay efficiency K of the display gray scale x is equal to the luminance decay efficiency K corresponding to the first gray scale y .

[0118] Step S5: Compensate each sub-pixel based on the compensated gray scale of each sub-pixel.

[0119] Specifically, the compensation module calculates the gray-scale compensation value of the sub-pixel through step S4, and converts the gray-scale compensation value into a compensation signal to be superimposed on the display signal of the sub-pixel. The display module performs display according to the compensated display signal received.

[0120] Through the solution of establishing multiple attenuation efficiency tables to replace the attenuation efficiency formula by the above steps S1-S5 in this application, the calculation accuracy of the attenuation efficiency is improved, and the aging compensation effect is enhanced. Moreover, according to the attenuation efficiency characteristics of sub-pixels of different emission colors, multiple mapping tables can be used to record the attenuation efficiency of sub-pixels of different emission colors at different times, improving the accuracy of the aging model. Then, according to the cumulative lighting time, the total efficiency of brightness attenuation corresponding to it is found to obtain the compensation gray scale, enhancing the aging compensation effect.

[0121] Please refer to Figure 7 , Figure 7 which is a schematic structural diagram of an embodiment of a compensation device for uneven aging of a display panel in this application. The compensation device 10 includes: a display module 11, a storage module 12, a timing module 13, and a compensation module 14.

[0122] The display module 11 is used to display an image and obtain the display gray scale of each sub-pixel. The display module 11 can detect in real time the gray scale of each sub-pixel of the panel image of the display panel at this time, and at the same time receive the display signal input by the compensation module 14.

[0123] The storage module 12 is used to record and store the brightness decay efficiency table obtained from the aging test, the integrated aging compensation table, and the updated total efficiency of cumulative brightness decay. Among them, the storage module 12 can store the currently updated total efficiency of cumulative brightness decay in real time.

[0124] The timing module 13 is used to obtain the cumulative lighting time of the display panel.

[0125] The compensation module 14 is used to calculate the compensation gray scale of the sub-pixel and generate an image compensation signal. At the same time, the compensation module 14 receives the external input display signal in real time, and superimposes the compensation signal of each sub-pixel on the display signal to the display module 11.

[0126] Among them, the display module 11 is connected to the compensation module 14 and the timing module 13 at the same time, facilitating the compensation module 14 to output the compensated external display signal to the display module 11 for display in real time; the storage module 12 is also connected to the compensation module 14 and the timing module 13 at the same time, and can query the current cumulative time and the corresponding brightness decay efficiency table.

[0127] In one embodiment, referring to Table 3 and Table 4, the timing module 13 records that the cumulative display time t1 of the display module 11 is 50h, the display module 11 detects that the display gray level of the display panel is 160, and the current total cumulative brightness decay efficiency obtained from the storage module 12 is 1000.

[0128] Since T0 < t1 < T1, according to Table 3, the decay efficiency tables at T0 and T1 can be obtained. The display gray level is 160, that is, a = 160, the corresponding first gray level is 128, that is, b = 128, and the decay efficiency is 0.4; the corresponding second gray level is 192, that is, c = 192, and the decay efficiency is 0.5.

[0129] According to formula (1), it can be calculated that at the moment t1, the decay efficiency of the display gray level of 160 is 0.45.

[0130] Adding the decay efficiency at this time to the current total cumulative brightness decay efficiency gives an updated total cumulative brightness decay efficiency of 1000.45, that is, x = 1000.45, and the newly obtained updated total cumulative brightness decay is stored in the storage module 12.

[0131] It can be known from Table 3 that 1000 < x < 2000, the corresponding first total decay efficiency is 1000, that is, y = 1000, and the gray level compensation value is 1; the corresponding second total decay efficiency is 2000, that is, z = 2000, and the gray level compensation value is 1.5.

[0132] According to formula (2), it can be calculated that at the moment t1, the compensated gray level of the display gray level of 160 is 1.

[0133] At this time, the new display gray level is 161, and the compensation module 14 converts the new display gray level into a new display signal and transmits it to the display module 11.

[0134] Please refer to Figure 8 , Figure 8 which is a schematic structural diagram of an embodiment of a display panel in the present application. The display panel 1 includes a compensation device 10, a memory 20, and a processor 30, wherein the memory 20 is connected to the compensation device 10 and the processor 30.

[0135] The display panel 1 includes a memory 20 and a processor 30 that are mutually coupled. The memory 20 stores program instructions, and the processor 30 is configured to execute the program instructions to implement the above-mentioned display panel compensation method.

[0136] Among them, the memory 20 stores instructions. When the memory 20 runs on a computer, the computer is caused to execute the above-mentioned display panel compensation method.

[0137] Specifically, there are various types of the memory 20 and the processor 30, which can be selected from the prior art according to requirements.

[0138] The above are only embodiments of the present application, and thus do not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present application, or directly or indirectly applied in other related technical fields, shall be similarly included in the patent protection scope of the present application.

Claims

1. A display panel compensation method, characterized in that, Including: Obtaining the cumulative lighting time of the display panel, and obtaining a brightness decay efficiency table corresponding to the cumulative lighting time based on the cumulative lighting time; wherein, the display panel includes sub-pixels provided with a plurality of preset display gray levels, and the brightness decay efficiency table includes the brightness decay efficiency of the sub-pixels when each preset display gray level is displayed relative to the brightness at a time node before the current cumulative lighting time. Obtaining the corresponding brightness decay efficiency based on the display gray level of each sub-pixel in the display panel and the brightness decay efficiency table. Obtaining the updated total cumulative brightness decay efficiency based on the brightness decay efficiency of each sub-pixel and the total cumulative brightness decay efficiency before update. Obtaining a compensation gray level based on the updated total cumulative brightness decay efficiency of each sub-pixel. Compensating the sub-pixels correspondingly based on the compensation gray level of each sub-pixel.

2. The compensation method according to claim 1, wherein The step of obtaining a brightness decay efficiency table corresponding to the cumulative lighting time based on the cumulative lighting time includes: Judging whether there is a brightness decay efficiency table corresponding to the cumulative lighting time stored. If so, retrieving and obtaining the brightness decay efficiency table corresponding to the cumulative lighting time. Otherwise, retrieving and obtaining a first time node closest to the cumulative lighting time and before the cumulative lighting time, and retrieving and obtaining a second time node closest to the cumulative lighting time and after the cumulative lighting time; obtaining a brightness decay efficiency table corresponding to the cumulative lighting time based on the first time node and the second time node.

3. The compensation method according to claim 1, characterized in that, The step of obtaining the updated total cumulative brightness decay efficiency based on the brightness decay efficiency of each sub-pixel and the total cumulative brightness decay efficiency before update includes: Obtaining the sum of the brightness decay efficiency of each sub-pixel and the total cumulative brightness decay efficiency before update, and using the sum as the updated total cumulative brightness decay efficiency.

4. The compensation method according to claim 1, wherein Before the step of obtaining the cumulative lighting time of the display panel and obtaining a brightness decay efficiency table corresponding to the cumulative lighting time based on the cumulative lighting time, it includes: for sub-pixels of each color, obtaining the gray level brightness values corresponding to different time nodes at each preset display gray level. For any two adjacent time nodes at each preset display gray level, obtaining the difference between the two adjacent time nodes, and using the difference as the gray level brightness attenuation value corresponding to the latter time node among the two adjacent time nodes. Obtaining a corresponding brightness decay efficiency table based on the gray level brightness attenuation values at different preset display gray levels corresponding to the same time node.

5. The compensation method according to claim 4, wherein The step of obtaining a corresponding brightness decay efficiency table based on the gray level brightness attenuation values at different preset display gray levels corresponding to the same time node includes: obtaining the gray level brightness attenuation values at different preset display gray levels corresponding to the same time node, and performing normalization processing to obtain the brightness decay efficiency table.

6. The compensation method according to claim 2, wherein The method for obtaining the corresponding brightness decay efficiency based on the display gray level of each sub-pixel and the brightness decay efficiency table includes the following steps: Determine whether there is a stored brightness decay efficiency corresponding to the display gray level; If so, retrieve and obtain the brightness decay efficiency corresponding to the display gray level; Otherwise, retrieve and obtain the brightness decay efficiency of the first gray level that is closest to and before the display gray level, and retrieve and obtain the brightness decay efficiency of the second gray level that is closest to and after the display gray level; obtain the brightness decay efficiency corresponding to the display gray level based on the brightness decay efficiency of the first gray level and the brightness decay efficiency of the second gray level.

7. The compensation method according to claim 1, characterized in that The method for obtaining the compensated gray level includes the following steps: Obtain an aging compensation table based on multiple preset total decay efficiencies and the gray level compensation values corresponding to each preset total decay efficiency; Obtain the compensated gray level based on the aging compensation table and the current cumulative total brightness decay efficiency.

8. The compensation method according to claim 7, characterized in that The method for obtaining the compensated gray level based on the aging compensation table and the updated cumulative total brightness decay efficiency includes the following steps: Determine whether there is an aging compensation table corresponding to the updated cumulative total brightness decay efficiency; If so, retrieve and obtain the aging compensation table corresponding to the updated cumulative total brightness decay efficiency; Otherwise, retrieve and obtain the aging compensation table of the first total brightness decay efficiency that is closest to and before the updated cumulative total brightness decay efficiency, and retrieve and obtain the aging compensation table of the second total brightness decay efficiency that is closest to and after the updated cumulative total brightness decay efficiency; obtain the aging compensation table corresponding to the updated cumulative total brightness decay efficiency based on the aging compensation table of the first total brightness decay efficiency and the aging compensation table of the second total brightness decay efficiency.

9. A display panel compensation device, characterized in that, Comprising: A display module, configured to display an image and obtain the display gray levels of each sub-pixel; A storage module, configured to record and store the brightness decay efficiency table obtained from the aging test, the integrated aging compensation table, and the updated cumulative total brightness decay efficiency; A timing module, configured to obtain the cumulative lighting time of the display panel; A compensation module, configured to calculate the compensated gray level of the sub-pixel and generate an image compensation signal.

10. A display panel, characterized in that, Comprising a memory and a processor coupled to each other, wherein program instructions are stored in the memory, and the processor is configured to execute the program instructions to implement the display panel compensation method according to any one of claims 1 to 8.

11. A memory, characterized in that, The memory stores instructions that, when the memory runs on a computer, cause the computer to execute the display panel compensation method according to any one of claims 1-8.

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