Compensation method, device and display equipment of display panel

Abstract

The application discloses a compensation method and device of a display panel and display equipment. The compensation method of the display panel comprises the following steps: acquiring an actual capacitance value of the display panel corresponding to the position of a sub-pixel, and determining an actual temperature value of the display panel corresponding to the position of the sub-pixel according to the actual capacitance value and a capacitance value-temperature relationship; and compensating a data voltage corresponding to the sub-pixel according to the actual temperature value corresponding to the sub-pixel. The technical scheme of the application improves the use performance of the display panel.

Description

Technical Field

[0001] This invention relates to the field of display technology, and in particular to a compensation method, apparatus, and display device for a display panel. Background Technology

[0002] With the rapid development of display technology, organic light-emitting display (OLED) products are being used more and more widely.

[0003] However, the performance of current OLED display panels needs improvement. Summary of the Invention

[0004] This invention provides a compensation method, apparatus, and display device for a display panel to improve the performance of the display panel.

[0005] According to one aspect of the present invention, a compensation method for a display panel is provided, the compensation method for the display panel comprising:

[0006] Obtain the actual capacitance value of the display panel corresponding to the position of the sub-pixel, and determine the actual temperature value of the display panel corresponding to the position of the sub-pixel based on the relationship between the actual capacitance value and the capacitance temperature.

[0007] The data voltage corresponding to the sub-pixel is compensated based on the actual temperature value of the sub-pixel.

[0008] Optionally, the step of compensating the data voltage corresponding to the sub-pixel based on the actual temperature value corresponding to the sub-pixel includes:

[0009] The first compensation value is determined based on the usage time of the display panel, the emission color of the sub-pixels, and the target grayscale value.

[0010] The actual accumulated value is determined based on the usage duration, and the actual accumulated value is updated based on the actual temperature value. A second compensation value is determined based on the updated actual accumulated value, the emission color of the sub-pixel, and the target grayscale value.

[0011] Based on the actual temperature value, the data voltage corresponding to the sub-pixel is compensated according to the first compensation value and / or the second compensation value;

[0012] Preferably, the step of compensating the data voltage corresponding to the sub-pixel based on the actual temperature value and according to the first compensation value and / or the second compensation value includes:

[0013] When the actual temperature value is less than or equal to the temperature threshold, the data voltage corresponding to the sub-pixel is compensated according to the first compensation value or the second compensation value;

[0014] When the actual temperature value of the display panel is greater than the temperature threshold, the data voltage corresponding to the sub-pixel is compensated according to the first compensation value and the second compensation value;

[0015] Preferably, the step of compensating the data voltage corresponding to the sub-pixel based on the first compensation value and the second compensation value includes:

[0016] The data voltage of the sub-pixel is compensated according to the second compensation value to obtain the first compensation voltage;

[0017] The first compensation voltage is compensated according to the first compensation value to obtain the compensated data voltage.

[0018] Optionally, determining the first compensation value based on the usage time of the display panel, the emission color of the sub-pixels, and the target grayscale value includes:

[0019] The actual cumulative value is determined based on the usage duration and the refresh rate of the display panel;

[0020] The first compensation value is determined from the first correspondence relationship based on the actual accumulated value, the emission color of the sub-pixel, and the target grayscale value; wherein, the first correspondence relationship is the correspondence relationship between the actual accumulated value, the emission color of the sub-pixel, the target grayscale value, and the compensation value.

[0021] Preferably, determining the actual cumulative value based on the usage duration and the refresh rate of the display panel includes:

[0022] The product of the usage duration and the refresh rate is used as the actual cumulative value.

[0023] Optionally, the step of determining the actual accumulated value based on the usage duration, updating the actual accumulated value based on the actual temperature value, and determining the second compensation value based on the updated actual accumulated value, the emission color of the sub-pixel, and the target grayscale value includes:

[0024] The actual cumulative value is determined based on the usage time and the refresh rate of the display panel, and a temperature weight value is determined based on the actual temperature value. The actual cumulative value is then updated based on the temperature weight value.

[0025] The second compensation value is determined from the first correspondence based on the updated actual cumulative value, the emission color of the sub-pixel, and the target grayscale value; wherein, the first correspondence is the correspondence between the actual cumulative value, the emission color of the sub-pixel, the target grayscale value, and the compensation value;

[0026] Preferably, the step of determining the actual cumulative value based on the usage duration and the refresh rate of the display panel, determining a temperature weight value based on the actual temperature value, and updating the actual cumulative value based on the temperature weight value includes:

[0027] The product of the usage duration and the refresh frequency is taken as the actual cumulative value;

[0028] Based on the usage duration and the actual temperature value, a temperature weight value is determined from a second correspondence; wherein, the second correspondence is the correspondence between the actual temperature value, the usage duration, and the temperature weight value;

[0029] The product of the actual cumulative value and the temperature weight value is used as the updated actual cumulative value.

[0030] Optionally, the display panel is divided into multiple regions, and the capacitance-temperature relationship is different for different regions;

[0031] Determining the actual temperature value of the display panel corresponding to the position of the sub-pixel based on the relationship between the actual capacitance value and capacitance temperature includes:

[0032] The region where the sub-pixel is located is determined based on the position of the sub-pixel, and the actual temperature value of the display panel corresponding to the position of the sub-pixel is determined based on the capacitance-temperature relationship corresponding to the region where the sub-pixel is located and the actual capacitance.

[0033] Optionally, before obtaining the actual capacitance value of the display panel corresponding to the position of the sub-pixel, the method further includes:

[0034] Drive the display panel to display a preset image;

[0035] Obtain the capacitance values ​​of the display panel at different temperatures, and determine the capacitance-temperature relationship based on the capacitance values ​​of the display panel at different temperatures;

[0036] Alternatively, obtain the capacitance value of each area of ​​the display panel at different temperatures, and determine the capacitance-temperature relationship corresponding to each area based on the capacitance value of the display panel at different temperatures;

[0037] Preferably, obtaining the capacitance value of the display panel at different temperatures includes:

[0038] At each temperature, the initial capacitance value at multiple different locations of the display panel is obtained, and the average value of the multiple initial capacitance values ​​is taken as the capacitance value of the display panel at the corresponding temperature.

[0039] Preferably, at each temperature, initial capacitance values ​​are obtained at multiple different locations of the display panel, and the average of the multiple initial capacitance values ​​is taken as the capacitance value of the display panel at the corresponding temperature, including:

[0040] At an initial temperature, the initial capacitance values ​​at multiple different locations of the display panel are obtained, and the average value of the multiple initial capacitance values ​​is taken as the capacitance value of the display panel at the corresponding temperature.

[0041] The initial temperature is updated according to the temperature step value, and the process returns to the step of obtaining the initial capacitance value at multiple different locations of the display panel at the initial temperature, until the initial temperature reaches the temperature set value, so as to obtain the capacitance value of the display panel at different temperatures.

[0042] Preferably, driving the display panel to display a preset image includes:

[0043] The display panel is driven to display the primary color image according to the first preset grayscale value.

[0044] Optionally, before obtaining the actual capacitance value of the display panel corresponding to the position of the sub-pixel, the method further includes:

[0045] Obtain the brightness variation relationship of multiple first target display panels with the same structure as the display panel at corresponding preset temperatures; wherein, the brightness variation relationship is the brightness variation relationship of the first target display panel over time; different first target display panels correspond to different preset temperatures;

[0046] The brightness values ​​of the first target display panel at different times are determined according to the corresponding brightness change relationship, and the temperature weight values ​​at different times under the corresponding preset temperature are determined according to the ratio of the brightness values ​​of the first target display panel at different times to the first reference brightness value, so as to determine the second correspondence relationship.

[0047] Preferably, the first reference brightness value is the brightness value of any of the first target display panels at the initial moment.

[0048] Optionally, before determining the first compensation value based on the usage duration of the display panel, the emission color of the sub-pixels, and the target grayscale value, the method further includes:

[0049] Obtain the brightness variation relationship of sub-pixels of each emitting color for multiple second target display panels with the same structure as the display panel at corresponding second preset grayscale values; wherein, the second preset grayscale values ​​are different for different second target display panels;

[0050] The brightness values ​​of the sub-pixels at different times are determined according to the corresponding brightness change relationship, and the grayscale weight values ​​of the sub-pixels of each luminous color in the second target display panel at different times are determined according to the ratio of the brightness value of the sub-pixels of each luminous color to the second reference brightness value at different times under the corresponding second preset grayscale value.

[0051] Based on the grayscale weight value and gamma value of each luminous color sub-pixel at different times under different second preset grayscale values, the compensation value of each luminous color sub-pixel at different times under different second preset grayscale values ​​is determined to determine the first correspondence.

[0052] Preferably, the second reference brightness values ​​corresponding to sub-pixels of different emission colors are different, and the second reference brightness value is the brightness value of the corresponding sub-pixel at the initial moment under any second preset grayscale value.

[0053] According to another aspect of the present invention, a compensation device for a display panel is provided, the compensation device for the display panel comprising:

[0054] The temperature acquisition module is used to acquire the actual capacitance value of the display panel corresponding to the position of the sub-pixel, and determine the actual temperature value of the display panel corresponding to the position of the sub-pixel based on the actual capacitance value and the capacitance-temperature relationship.

[0055] The compensation module is used to compensate the data voltage corresponding to the sub-pixel based on the actual temperature value corresponding to the sub-pixel.

[0056] According to another aspect of the present invention, a display device is provided, the display device including a display panel and a compensation device for the display panel as described in any embodiment of the present invention.

[0057] The technical solution of this invention obtains the actual capacitance value of the display panel corresponding to the position of a sub-pixel and determines the actual temperature value of the display panel corresponding to the position of the sub-pixel based on the relationship between the actual capacitance value and the capacitance temperature. This allows for obtaining the actual temperature of the display panel corresponding to the position of the sub-pixel without increasing hardware costs, thus reducing the cost of the display panel. Furthermore, by compensating the data voltage corresponding to the sub-pixel based on its actual temperature value, the changes in driving current caused by usage time and temperature variations can be compensated, thereby compensating for the luminous brightness of the sub-pixel and, consequently, for the brightness decay of the display panel caused by usage time and temperature variations. This achieves aging compensation of the display panel combined with temperature, improving compensation accuracy, enhancing the display effect, and ultimately improving the performance of the display panel.

[0058] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0059] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0060] Figure 1 This is a flowchart of a compensation method for a display panel provided in an embodiment of the present invention;

[0061] Figure 2 This is a flowchart of another compensation method for a display panel provided in an embodiment of the present invention;

[0062] Figure 3 This is a flowchart of another compensation method for a display panel provided in an embodiment of the present invention;

[0063] Figure 4 This is a flowchart of another compensation method for a display panel provided in an embodiment of the present invention;

[0064] Figure 5 This is a schematic diagram of the structure of a display panel provided in an embodiment of the present invention;

[0065] Figure 6 This is a flowchart of another compensation method for a display panel provided in an embodiment of the present invention;

[0066] Figure 7 This is a capacitance-temperature relationship curve of a display panel provided in an embodiment of the present invention;

[0067] Figure 8 This is a flowchart of another compensation method for a display panel provided in an embodiment of the present invention;

[0068] Figure 9 This is a flowchart of another compensation method for a display panel provided in an embodiment of the present invention;

[0069] Figure 10 This is a schematic diagram of the structure of a compensation device for a display panel provided in an embodiment of the present invention;

[0070] Figure 11 This is a schematic diagram of the structure of a display device provided in an embodiment of the present invention. Detailed Implementation

[0071] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0072] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0073] As mentioned in the background section, existing display panels suffer from performance issues that require improvement. The inventors have discovered that this problem arises because display panels comprise sub-pixels and pixel circuits. Pixel circuits can be 2T1C pixel circuits or variations thereof, or 7T1C pixel circuits or variations thereof. Sub-pixels can include organic light-emitting diodes (OLEDs). Pixel circuits include driving transistors, which generate driving current, causing the sub-pixels to emit light in response. However, as the display panel is used over time, the characteristics of the driving transistors are affected, impacting the driving current and consequently affecting the brightness of the sub-pixels. Furthermore, the material of the sub-pixels is also affected by usage time, leading to brightness decay. Therefore, with accumulated usage time, display panels experience aging issues, affecting display performance and ultimately impacting overall display performance.

[0074] Furthermore, because the sub-pixels in different locations on the display panel are used to varying degrees, the brightness decay in different locations differs, affecting the image quality of the display panel and resulting in poor performance.

[0075] To address the aforementioned technical problems, embodiments of the present invention provide a compensation method for a display panel. The compensation method for the display panel can be implemented by a compensation device for the display panel, which can be located in the driver chip corresponding to the display panel, or the compensation device for the display panel can be the driver chip itself. Figure 1This is a flowchart of a compensation method for a display panel provided in an embodiment of the present invention, see reference. Figure 1 The compensation methods for the display panel include:

[0076] S110. Obtain the actual capacitance value of the display panel corresponding to the position of the sub-pixel, and determine the actual temperature value of the display panel corresponding to the position of the sub-pixel based on the relationship between the actual capacitance value and the capacitance temperature.

[0077] The display panel includes pixel units, each of which may include sub-pixels of at least one emitting color, and each sub-pixel may include an organic light-emitting diode (OLED). The display panel also includes a touch substrate, which contains sensing devices. A touch chip can acquire the capacitance value of the sensing devices, thereby determining the touch position through changes in the capacitance value. Therefore, the actual capacitance value of the display panel can be either the overall capacitance value of the display panel structure or the actual capacitance value of the touch substrate. For example, if the actual capacitance value of the display panel corresponding to the position of a sub-pixel is the actual capacitance value of the touch substrate corresponding to that position, then the driver chip can acquire the actual capacitance value of the display panel corresponding to the position of the sub-pixel through the touch chip.

[0078] Specifically, the capacitance distribution of the display panel can be obtained from the touch chip, thereby obtaining the actual capacitance value of the display panel corresponding to the position of each sub-pixel. There is a correlation between the capacitance value and temperature of the display panel. After obtaining the actual capacitance value of the display panel corresponding to the position of the sub-pixel, the actual capacitance value can be substituted into the capacitance-temperature relationship to determine the actual temperature value of the display panel corresponding to the position of the sub-pixel.

[0079] The capacitance-temperature relationship can be stored in the memory corresponding to the display panel. One display panel can correspond to one capacitance-temperature relationship, or the display panel can include different areas, with different areas corresponding to different capacitance-temperature relationships. This embodiment does not impose any limitations.

[0080] S120. Compensate the data voltage corresponding to the sub-pixel based on the actual temperature value corresponding to the sub-pixel.

[0081] In this system, each sub-pixel corresponds to a pixel circuit. The pixel circuit generates a driving current based on the data voltage, causing the sub-pixel to emit light in response to the driving current.

[0082] Specifically, by determining the compensation value based on the actual temperature value corresponding to the sub-pixel, the data voltage corresponding to the sub-pixel can be compensated. This can compensate for changes in the driving current caused by usage time and temperature variations, thereby compensating for the luminous brightness of the sub-pixel. In turn, it can compensate for the brightness decay of the display panel caused by usage time and temperature variations, thus achieving aging compensation for the display panel, improving the display effect of the display panel, and ultimately improving the performance of the display panel.

[0083] The compensation value can be a compensation voltage value, in which case the data voltage can be compensated by adding or subtracting the compensation voltage value. Alternatively, the compensation value can be a grayscale compensation value, in which case the grayscale value corresponding to the data voltage is added or subtracted from the compensation value and then converted into the compensated data voltage; or, the grayscale compensation value can be converted into a compensation voltage value, and the data voltage can be compensated by adding or subtracting the compensation voltage value.

[0084] Furthermore, by compensating for the data voltage corresponding to the sub-pixel based on its actual temperature value, compensation can be made according to the temperature changes of the display panel, thus improving compensation accuracy. Moreover, since different sub-pixels have different actual temperatures, compensation can be applied to each sub-pixel based on its actual temperature value. This ensures that, after compensation, the luminous intensity of the sub-pixels tends to be consistent at the same grayscale level, thereby improving the display uniformity and performance of the display panel.

[0085] The technical solution of this embodiment obtains the actual capacitance value of the display panel corresponding to the position of the sub-pixel, and determines the actual temperature value of the display panel corresponding to the position of the sub-pixel based on the relationship between the actual capacitance value and the capacitance temperature. This allows for the acquisition of the actual temperature of the display panel corresponding to the position of the sub-pixel without increasing hardware costs, thus reducing the cost of the display panel. Furthermore, by compensating the data voltage corresponding to the sub-pixel based on its actual temperature value, the changes in driving current caused by usage time and temperature variations can be compensated, thereby compensating for the luminous brightness of the sub-pixel. This, in turn, compensates for the brightness decay of the display panel caused by usage time and temperature variations, achieving aging compensation of the display panel combined with temperature. This improves compensation accuracy, enhances the display effect, and ultimately improves the performance of the display panel.

[0086] Based on the above technical solution, the following describes the method for compensating the data voltage corresponding to the sub-pixel, but this is not intended to limit the scope of this application.

[0087] Figure 2 This is a flowchart of another compensation method for a display panel provided in an embodiment of the present invention. Optionally, refer to... Figure 2 The compensation methods for the display panel include:

[0088] S210. Obtain the actual capacitance value of the display panel corresponding to the position of the sub-pixel, and determine the actual temperature value of the display panel corresponding to the position of the sub-pixel based on the relationship between the actual capacitance value and the capacitance temperature.

[0089] S220. Determine the first compensation value based on the usage time of the display panel, the emission color of the sub-pixels, and the target grayscale value.

[0090] Specifically, the brightness decay of sub-pixels varies depending on the usage duration of the display panel, the emitted color of the sub-pixels, and the target grayscale value of the sub-pixels. Therefore, by determining the first compensation value based on the usage duration of the display panel, the emitted color of the sub-pixels, and the target grayscale value, compensation can be made for the data voltage corresponding to the sub-pixels under different conditions, thereby compensating for the brightness decay of the sub-pixels under different conditions and improving the compensation accuracy.

[0091] S230. Determine the actual accumulated value based on the usage time, update the actual accumulated value based on the actual temperature value, and determine the second compensation value based on the updated actual accumulated value, the emission color of the sub-pixel, and the target grayscale value.

[0092] Specifically, the actual cumulative value can be the cumulative number of refreshes or the cumulative number of displays, etc. By determining the actual cumulative value based on the usage duration and updating the actual cumulative value based on the actual temperature value, the determined second compensation value not only takes into account the impact of usage duration, emission color, and target grayscale value on brightness attenuation, but also incorporates the impact of temperature on brightness attenuation. This allows the determined second compensation value to better compensate for data voltage and improve compensation accuracy.

[0093] It should be noted that steps S220 and S230 can be executed simultaneously, or steps S220 can be executed first and then steps S230, or steps S230 can be executed first and then steps S220. This embodiment does not impose any limitations.

[0094] S240. Based on the actual temperature value, compensate the data voltage corresponding to the sub-pixel according to the first compensation value and / or the second compensation value.

[0095] Specifically, for example, the compensation value can be determined based on the range of the actual temperature value. When the actual temperature value is within a first temperature range, a first compensation value can be used to compensate for the data voltage, or a second compensation value can be used. When the actual temperature value is within a second temperature range, both the first and second compensation values ​​can be used to compensate for the data voltage. Thus, when the temperature is high, the impact of temperature changes is significant, and using both the first and second compensation values ​​can improve the compensation effect.

[0096] Based on the above technical solution, optionally, compensation is performed on the data voltage corresponding to the sub-pixel based on the actual temperature value, according to a first compensation value and / or a second compensation value, including:

[0097] Step a1: When the actual temperature value is less than or equal to the temperature threshold, compensate the data voltage corresponding to the sub-pixel according to the first compensation value or the second compensation value.

[0098] Specifically, when the actual temperature value is less than or equal to the temperature threshold, the brightness decay of the sub-pixel is less affected by temperature, and either the first compensation value or the second compensation value can be used to compensate for the data voltage corresponding to the sub-pixel. The second compensation value is related to the actual temperature value, and can therefore compensate for the brightness decay of the sub-pixel caused by temperature changes. If the first compensation value is not related to the actual temperature value, it is unaffected by temperature changes and can be used to compensate for the data voltage corresponding to when the display panel is powered on or off.

[0099] Step a2: When the actual temperature value of the display panel is greater than the temperature threshold, the data voltage corresponding to the sub-pixel is compensated according to the first compensation value and the second compensation value.

[0100] Specifically, when the actual temperature value exceeds the temperature threshold, the brightness attenuation of the sub-pixel is significantly affected by temperature. Therefore, a first compensation value and a second compensation value are used to compensate for the data voltage corresponding to the sub-pixel. The second compensation value, related to the actual temperature value, can compensate for brightness changes caused by temperature variations. Using the first compensation value can compensate for brightness jumps during power-on or power-off, thus improving compensation accuracy, increasing compensation capabilities, and expanding application scenarios.

[0101] Optionally, in step a2, compensating the data voltage corresponding to the sub-pixel based on the first compensation value and the second compensation value includes:

[0102] Step a21: Compensate according to the data voltage of the second compensation value sub-pixel to obtain the first compensation voltage.

[0103] Specifically, a second compensation value can be used to compensate the data voltage. Since the second compensation value is related to the actual temperature value, the compensated first compensation voltage can compensate for the brightness decay of the sub-pixel caused by temperature, thereby improving the luminous effect of the sub-pixel.

[0104] Step a22: Compensate the first compensation voltage according to the first compensation value to obtain the compensated data voltage.

[0105] Specifically, after using the second compensation value to compensate the data voltage to obtain the first compensation voltage, the first compensation value is then used again to compensate the first compensation voltage to obtain the compensated data voltage. Thus, combining the first and second compensation values ​​to compensate the data voltage improves the compensation effect.

[0106] Based on the above technical solutions, Figure 3 This is a flowchart of another compensation method for a display panel provided in an embodiment of the present invention. Optionally, refer to... Figure 3 The compensation methods for the display panel include:

[0107] S310. Obtain the actual capacitance value of the display panel corresponding to the position of the sub-pixel, and determine the actual temperature value of the display panel corresponding to the position of the sub-pixel based on the relationship between the actual capacitance value and the capacitance temperature.

[0108] S320. Determine the actual cumulative value based on the usage time and the refresh rate of the display panel.

[0109] Specifically, the usage time of the display panel refers to its display duration. Based on the usage time and refresh rate, the cumulative refresh count can be determined, which is the actual cumulative value. Aging compensation can then be performed based on the cumulative refresh count. Within the same usage time, a higher refresh count has a greater impact on the display panel, resulting in greater brightness decay of sub-pixels. Therefore, compared to compensating solely based on usage time, aging compensation using the cumulative refresh count provides better compensation accuracy and improves the overall performance of the display panel.

[0110] S330. Determine a first compensation value from a first correspondence based on the actual accumulated value, the emission color of the sub-pixel, and the target grayscale value; wherein, the first correspondence is the correspondence between the actual accumulated value, the emission color of the sub-pixel, the target grayscale value, and the compensation value.

[0111] Specifically, the first correspondence can be stored in the memory corresponding to the display panel, and can be stored in the form of a table, formula, or curve; this embodiment does not limit this. After determining the actual accumulated value, the actual accumulated value, the emission color of the sub-pixel, and the target grayscale value are substituted into the first correspondence to find the corresponding first compensation value.

[0112] As can be seen, if the first compensation value cannot be found directly, the first compensation value can be obtained by interpolation using a close actual cumulative value and a close target gray level value.

[0113] For example, the display panel may include R sub-pixels, G sub-pixels, and B sub-pixels. Table 1 is a cumulative compensation table corresponding to any target grayscale value. Different target grayscale values ​​may correspond to different cumulative compensation tables.

[0114] Table 1. Cumulative Compensation Table for Any Target Gray Scale Value

[0115] R G B counter1 C_R1 C_G1 C_B1 counter2 C_R2 C_G2 C_B2 …… …… …… …… countern C_Rn C_Gn C_Bn

[0116] `counter1` represents the actual accumulated value corresponding to the display panel's usage time `t1`, `counter2` represents the actual accumulated value corresponding to the display panel's usage time `t2`, and so on. `countern` represents the actual accumulated value corresponding to the display panel's usage time `tn`. `C_R1` is the first compensation value corresponding to the R sub-pixel when its actual accumulated value is `counter1`, and so on. Similarly, `C_Rn` is the first compensation value corresponding to the R sub-pixel when its actual accumulated value is `countern`. Likewise, `C_G1` is the first compensation value corresponding to the G sub-pixel when its actual accumulated value is `counter1`, and so on. `C_Gn` is the first compensation value corresponding to the G sub-pixel when its actual accumulated value is `countern`. Similarly, `C_B1` is the first compensation value corresponding to the B sub-pixel when its actual accumulated value is `counter1`, and so on. `C_Bn` is the first compensation value corresponding to the B sub-pixel when its actual accumulated value is `countern`. Different target grayscale values ​​can correspond to different accumulated compensation tables. Thus, after determining the actual cumulative value of the display panel and the target grayscale value of the sub-pixel, the first compensation value can be determined based on the actual cumulative value, the emission color of the sub-pixel, and the target grayscale value.

[0117] S340: Determine the actual cumulative value based on the usage time and the refresh rate of the display panel, determine the temperature weight value based on the actual temperature value, and update the actual cumulative value based on the temperature weight value.

[0118] Specifically, different actual temperature values ​​have different effects on the brightness of sub-pixels, so different temperature weight values ​​can be used. That is, the temperature weight value can be determined based on the actual temperature value. The actual accumulated value is updated according to the temperature weight value, so that the actual accumulated value increases or decreases, and the corresponding compensation value increases or decreases. In this way, the temperature influence factor is integrated into the compensation value, which helps to improve the compensation effect.

[0119] S350. Determine the second compensation value from the first correspondence based on the updated actual cumulative value, the emission color of the sub-pixel, and the target grayscale value; wherein, the first correspondence is the correspondence between the actual cumulative value, the emission color of the sub-pixel, the target grayscale value, and the compensation value.

[0120] Specifically, by substituting the updated actual cumulative value, the emission color of the sub-pixel, and the target grayscale value into the first correspondence, the second compensation value can be found. If the second compensation value cannot be found directly, it can be determined by interpolation.

[0121] S360: Based on the actual temperature value, compensate the data voltage corresponding to the sub-pixel according to the first compensation value and / or the second compensation value.

[0122] Based on the above technical solution, optionally, the actual cumulative value can be determined according to the usage duration and the refresh rate of the display panel, including:

[0123] The product of usage time and refresh rate is used as the actual cumulative value.

[0124] For example, if the usage time is tn and the refresh rate of the display panel is frame, then the actual cumulative value counter = tn × frame. In this way, the cumulative refresh count of the display panel can be determined. Aging compensation based on the cumulative refresh count can more accurately determine the first compensation value and the second compensation value, thus improving the compensation accuracy.

[0125] Based on the above technical solution, optionally, the actual cumulative value is determined according to the usage time and the refresh rate of the display panel, and a temperature weight value is determined based on the actual temperature value. The actual cumulative value is then updated based on the temperature weight value, including:

[0126] Step b1: Use the product of usage time and refresh rate as the actual cumulative value.

[0127] Step b2: Determine the temperature weight value from the second correspondence based on the usage time and the actual temperature value; wherein, the second correspondence is the correspondence between the actual temperature value, the usage time and the temperature weight value.

[0128] Specifically, when the actual temperature value is the same, different usage durations result in different effects of temperature on the display panel. Therefore, a temperature weight value can be determined based on the usage duration and the actual temperature value. This second correspondence can be stored in the memory corresponding to the display panel, and can be stored in the memory in the form of a table, curve, or formula. Substituting the usage duration and the actual temperature value into the second correspondence allows the temperature weight value to be found. It is evident that when a direct lookup is not possible, interpolation can be used to determine the temperature weight value.

[0129] For example, Table 2 shows the second correspondence for the display panels. As shown in Table 2, when the actual temperature is -10℃ and the usage time of the display panel is t0, the corresponding temperature weight value is Te_01. Similarly, when the actual temperature is -10℃ and the usage time of the display panel is tn, the corresponding temperature weight value is Te_n1. Likewise, when the actual temperature is 30℃ and the usage time of the display panel is t0, the corresponding temperature weight value is Te_02. Similarly, when the actual temperature is 30℃ and the usage time of the display panel is tn, the corresponding temperature weight value is Te_n2. When the actual temperature is 70℃ and the usage time of the display panel is t0, the corresponding temperature weight value is Te_03. Similarly, when the actual temperature is 70℃ and the usage time of the display panel is tn, the corresponding temperature weight value is Te_n3.

[0130] Table 2 shows the second correspondence between the display panels.

[0131] -10℃ 30℃ 70℃ t0 Te_01 Te_02 Te_02 t1 Te_11 Te_12 Te_13 …… …… …… …… tn Te_n1 Te_n2 Te_n3

[0132] It should be noted that Table 2 shows the temperature weight values ​​stored in the second correspondence for temperature values ​​of -10℃, 30℃, and 70℃, but this is not a limitation. In some other embodiments, temperature weight values ​​corresponding to other temperatures, such as 50℃ and 60℃, may also be stored, and this is not a limitation here.

[0133] Step b3: Multiply the actual cumulative value by the temperature weight value to obtain the updated actual cumulative value.

[0134] For example, as shown in Table 1, if the usage time of the display panel is t1, the actual cumulative value is counter1, and the temperature weight value is m, then the updated actual cumulative value is m×counter1. For example, if m×counter1 equals counter2, then the second compensation value corresponding to the R sub-pixel is C_R2. Thus, by updating the actual cumulative value using the temperature weight value, the obtained second compensation value incorporates the temperature influence factor, allowing for better compensation and improving compensation accuracy.

[0135] Based on the above technical solutions, in one embodiment, the display panel corresponds to a capacitance-temperature relationship. By substituting the actual capacitance value into the capacitance-temperature relationship, the corresponding actual temperature value can be determined.

[0136] In another implementation, the display panel is divided into multiple areas, and the capacitance-temperature relationship varies for each area. Figure 4 This is a flowchart of another compensation method for a display panel provided in an embodiment of the present invention. Optionally, refer to... Figure 4 The compensation methods for the display panel include:

[0137] S410: Obtain the actual capacitance value of the display panel corresponding to the position of the sub-pixel.

[0138] S420. Determine the area where the sub-pixel is located based on its position, and determine the actual temperature value of the display panel corresponding to the position of the sub-pixel based on the capacitance-temperature relationship and actual capacitance of the area where the sub-pixel is located.

[0139] Specifically, by determining the location of a sub-pixel, the region where the sub-pixel is located can be identified, thus establishing the capacitance-temperature relationship corresponding to that sub-pixel. Substituting the actual capacitance value of the sub-pixel into the capacitance-temperature relationship yields the actual temperature value of the display panel corresponding to the sub-pixel's location. In this way, even when there are significant differences between different areas of the display panel, the actual temperature value of the display panel corresponding to the sub-pixel's location can be accurately determined, thereby improving the compensation effect.

[0140] For example, Figure 5 This is a schematic diagram of the structure of a display panel provided in an embodiment of the present invention, such as... Figure 5 As shown, the display panel is divided into a first region A1, a second region A2, and a third region A3. The first region A1 corresponds to a first capacitance temperature relationship, the second region A2 corresponds to a second capacitance temperature relationship, and the third region A3 corresponds to a third capacitance temperature relationship. Thus, based on the position of the sub-pixel, the region where the sub-pixel is located can be determined, thereby determining the capacitance temperature relationship corresponding to the sub-pixel and ultimately the actual temperature value of the display panel corresponding to the sub-pixel's position.

[0141] It should be noted that, Figure 5 This embodiment only shows one method of area division. In other embodiments, the display panel may also use other division methods, such as uniformly dividing it into 9 or 16 areas. Alternatively, a portion with a unique structure may be considered as one area, and the remaining portion as another area; for example, the portion housing the photosensitive element may be considered as one area, and the remaining portion as another. Other methods of area division are also possible, and this embodiment is not limited to any particular method.

[0142] S430: Compensate the data voltage corresponding to the sub-pixel based on the actual temperature value of the sub-pixel.

[0143] Based on the above technical solutions, the method for determining the relationship between capacitance and temperature will be explained below, but this is not intended to limit this application.

[0144] Figure 6 This is a flowchart of another compensation method for a display panel provided in an embodiment of the present invention. Optionally, refer to... Figure 6 The compensation methods for the display panel include:

[0145] S510, the driver display panel displays the preset screen.

[0146] Specifically, after adjusting the display panel, such as performing gamma adjustment, to bring it to an optimal state, the display panel is then driven to display a preset image. The preset image is, for example, a solid color image, where all sub-pixels have the same grayscale value, which facilitates determining the correspondence between the display panel's temperature and capacitance.

[0147] S520. Obtain the capacitance value of the display panel at different temperatures, and determine the capacitance-temperature relationship based on the capacitance value of the display panel at different temperatures; or, obtain the capacitance value of each area of ​​the display panel at different temperatures, and determine the capacitance-temperature relationship corresponding to each area based on the capacitance value of the display panel at different temperatures.

[0148] Specifically, when a display panel corresponds to a single capacitance-temperature relationship, this relationship can be determined based on the capacitance values ​​of the display panel at different temperatures. When a display panel is divided into multiple regions, the capacitance-temperature relationship for each region can be determined based on the capacitance values ​​of the display panel at different temperatures. This avoids the problem of inaccurate capacitance-temperature relationships caused by significant differences between different locations on the display panel.

[0149] S530: Obtain the actual capacitance value of the display panel corresponding to the position of the sub-pixel, and determine the actual temperature value of the display panel corresponding to the position of the sub-pixel based on the relationship between the actual capacitance value and the capacitance temperature.

[0150] S540: Compensate the data voltage corresponding to the sub-pixel based on the actual temperature value corresponding to the sub-pixel.

[0151] Based on the above technical solution, optionally, the capacitance value of the display panel at different temperatures is obtained, including:

[0152] At each temperature, the initial capacitance values ​​at multiple different locations on the display panel are obtained, and the average of the multiple initial capacitance values ​​is taken as the capacitance value of the display panel at the corresponding temperature.

[0153] Specifically, multiple detection points can be set on the display panel to obtain the initial capacitance values ​​corresponding to multiple locations. By calculating the average of these initial capacitance values, the capacitance value of the display panel at the corresponding temperature can be obtained. Each temperature can be a preset temperature value, thus determining the capacitance value of the display panel at each preset temperature value, thereby establishing the capacitance-temperature relationship of the display panel.

[0154] Optionally, at each temperature, initial capacitance values ​​at multiple different locations on the display panel are obtained, and the average of the multiple initial capacitance values ​​is taken as the capacitance value of the display panel at the corresponding temperature, including:

[0155] Step c1: At the initial temperature, obtain the initial capacitance values ​​at multiple different locations on the display panel, and take the average of the multiple initial capacitance values ​​as the capacitance value of the display panel at the corresponding temperature.

[0156] Specifically, the initial temperature is a set temperature value. A thermostat can be used to control the ambient temperature of the display panel as the initial temperature, thereby obtaining the capacitance value of the display panel at that initial temperature. The initial temperature can be determined according to the application scenario of the display panel; this embodiment does not impose any limitations.

[0157] Step c2: Update the initial temperature according to the temperature step value, and return to execute step c2 until the initial temperature reaches the temperature set value, so as to obtain the capacitance value of the display panel at different temperatures.

[0158] Specifically, the initial temperature is updated according to the temperature step value. For example, the initial temperature is added to the temperature step value to obtain the updated initial temperature. Then, the capacitance value of the display panel is obtained at the updated initial temperature. This process is repeated until the initial temperature reaches the set temperature value. In this way, the capacitance value of the display panel can be obtained at multiple set temperature values, and the correspondence between the temperature and capacitance value of the display panel can be determined. Thus, the capacitance-temperature relationship of the display panel can be determined.

[0159] For example, the display panel can be heated from -10°C to 70°C in 10°C increments to obtain capacitance values ​​C1 to C9, thus obtaining the capacitance-temperature relationship. Figure 7 This is a capacitance-temperature relationship curve of a display panel provided in an embodiment of the present invention, such as... Figure 7 As shown, the capacitance of the display panel increases with increasing temperature, thus the actual temperature value of the display panel can be determined based on the actual capacitance value and the capacitance-temperature relationship.

[0160] Optionally, the driver displays a preset screen, including:

[0161] The driver displays the primary color image according to the first preset grayscale value.

[0162] Specifically, for example, if the primary color of the image is white, the number of gray levels on the display panel is 256. For example, if the first preset gray level value is 255, then all sub-pixels have the same gray level value. This makes it easier to determine the correspondence between the capacitance and temperature of the display panel using the controlled variable method, thereby obtaining an accurate capacitance-temperature relationship, which is beneficial to improving the compensation effect of the display panel.

[0163] It should be noted that the method for determining the capacitance-temperature relationship of each region is the same as the method for determining the capacitance-temperature relationship of the display panel, and will not be repeated here.

[0164] Based on the above technical solutions, the method for determining the second correspondence relationship will be explained below, but it is not intended to limit this application.

[0165] Figure 8 This is a flowchart of another compensation method for a display panel provided in an embodiment of the present invention. Optionally, refer to... Figure 8 The compensation methods for the display panel include:

[0166] S610. Obtain the brightness variation relationship of multiple first target display panels with the same structure as the display panel at corresponding preset temperatures; wherein, the brightness variation relationship is the brightness variation relationship of the first target display panel over time; different first target display panels correspond to different preset temperatures.

[0167] In this scenario, the display images corresponding to different first target display panels are identical. For example, all first target display panels are driven to display a solid color image, making the grayscale values ​​of all first target display panels the same.

[0168] For example, three first target display panels with the same structure as the display panel can be set. At a first preset temperature, the first target display panel is driven to display an image for a certain period of time, and the brightness change relationship of the first target display panel at the first preset temperature is obtained. Similarly, at a second preset temperature, the second target display panel is driven to display an image, and the brightness change relationship of the second target display panel at the second preset temperature is obtained. At a third preset temperature, the third target display panel is driven to display an image, and the brightness change relationship of the third target display panel at the second preset temperature is obtained. In this way, the brightness change relationships of multiple first target display panels at corresponding preset temperatures can be obtained.

[0169] By setting up multiple first target display panels with the same structure as the display panel, and obtaining the brightness change relationship at different preset temperatures, it is possible to avoid the problem of the display panel aging after obtaining the brightness change relationship at the first preset temperature using the same display panel. Subsequently, the display panel corresponding to the brightness change relationship at the second preset temperature will have changed characteristics, thereby reducing the accuracy of obtaining the brightness change relationship.

[0170] S620. Determine the brightness value of the first target display panel at different times according to the corresponding brightness change relationship, and determine the temperature weight value at different times under the corresponding preset temperature according to the ratio of the brightness value of the first target display panel at different times to the first reference brightness value, so as to determine the second correspondence relationship.

[0171] The first reference brightness value can be a set brightness value or a collected brightness value; this embodiment does not impose any limitation on it.

[0172] Specifically, by analyzing the brightness variation of the first target display panel, the brightness value of the first target display panel at different times can be determined. By calculating the ratio of the brightness value of the first target display panel at different times to the first reference brightness value, the degree of brightness deviation of the first target display panel at each time can be determined, thereby determining the degree of influence of temperature on the display panel at different times, and thus determining the temperature weight value at different times. By calculating the temperature weight value of each first target display panel at different times, and considering that the preset temperature of the environment in which each first target display panel is located is different, the correspondence between the preset temperature, usage time, and temperature weight value can be determined. This leads to the second correspondence: the correspondence between the actual temperature value, usage time, and temperature weight value.

[0173] Optionally, the first reference brightness value is the brightness value of any first target display panel at the initial moment.

[0174] Specifically, the brightness value of any first target display panel at the initial moment is the brightness value of the first target display panel when it is not in use at any preset temperature. Since the first display panel is not in use at the initial moment and is not affected by aging, the brightness value at the initial moment can be used as the first reference brightness value.

[0175] For example, if the first reference brightness value is the brightness value b3_t0_lv of the third first target display panel at the initial time t0, and the brightness value of the first first target display panel at time t0 is b1_t0_lv, then the temperature weight value of the first first target display panel at time t0 is... Similarly, the temperature weighting value of the first target display panel at time tn is... The temperature weighting value of the second first target display panel at time tn The temperature weighting value of the third first target display panel at time tn is In this way, the temperature weight values ​​corresponding to different times at each preset temperature can be determined, thereby determining the second correspondence.

[0176] S630: Obtain the actual capacitance value of the display panel corresponding to the position of the sub-pixel, and determine the actual temperature value of the display panel corresponding to the position of the sub-pixel based on the relationship between the actual capacitance value and the capacitance temperature.

[0177] S640. Determine the first compensation value based on the usage time of the display panel, the emission color of the sub-pixels, and the target grayscale value.

[0178] S650 uses the product of usage time and refresh rate as the actual cumulative value.

[0179] S660. Determine the temperature weight value from the second correspondence based on the usage time and the actual temperature value; wherein, the second correspondence is the correspondence between the actual temperature value, the usage time and the temperature weight value.

[0180] S670, The product of the actual cumulative value and the temperature weight value is used as the updated actual cumulative value.

[0181] S680. Determine the second compensation value from the first correspondence based on the updated actual cumulative value, the emission color of the sub-pixel, and the target grayscale value; wherein, the first correspondence is the correspondence between the actual cumulative value, the emission color of the sub-pixel, the target grayscale value, and the compensation value.

[0182] S690. Based on the actual temperature value, compensate the data voltage corresponding to the sub-pixel according to the first compensation value and / or the second compensation value.

[0183] Based on the above technical solutions, the method for determining the first correspondence relationship will be explained below, but this should not be construed as limiting the scope of this application.

[0184] Figure 9 This is a flowchart of another compensation method for a display panel provided in an embodiment of the present invention. Optionally, refer to... Figure 9 The compensation methods for the display panel include:

[0185] S710. Obtain the brightness variation relationship of sub-pixels of each emitting color under the corresponding second preset grayscale value for multiple second target display panels with the same structure as the display panel; wherein, the second preset grayscale value is different for different second target display panels.

[0186] Specifically, multiple second target display panels with the same structure as the display panel are selected. Each second target display panel is driven to display a white image according to a corresponding preset grayscale value, and the brightness value of each emitting color sub-pixel at time t0-tn is obtained. For example, the brightness value of each emitting color sub-pixel can be measured separately under the white image, or the brightness value of the pixel unit can be measured to separate the brightness value of each emitting color sub-pixel in the pixel unit. This embodiment does not limit this.

[0187] S720. Determine the brightness value of the sub-pixel at different times according to the corresponding brightness change relationship, and determine the grayscale weight value of the sub-pixel of each emitting color at different times under the corresponding second preset grayscale value according to the ratio of the brightness value of the sub-pixel of each emitting color to the second reference brightness value in the second target display panel at different times.

[0188] Specifically, based on the brightness variation relationship, the brightness value of the corresponding sub-pixel at different times can be determined. The ratio of the brightness value of each emitting color sub-pixel in the second target display panel at different times to the second reference brightness value, multiplied by the maximum grayscale value corresponding to the display panel, is the grayscale weight value of each emitting color sub-pixel at different times under the second preset grayscale value corresponding to the second target display panel. In this way, the correspondence between the preset grayscale value, the emitting color of the sub-pixel, and the grayscale weight value can be determined. In some other embodiments, the ratio of the brightness value of each emitting color sub-pixel in the second target display panel at different times to the second reference brightness value can also be used as the grayscale weight value of each emitting color sub-pixel at different times under the corresponding second preset grayscale value; this embodiment does not limit this.

[0189] For example, Table 3 is a grayscale weight table. As shown in Table 3, for example, the display panel includes R sub-pixels, G sub-pixels, and B sub-pixels. The second preset grayscale value corresponding to the first second target display panel is 64. The second preset grayscale value corresponding to the second second target display panel is 128, and the second preset grayscale value corresponding to the third second display panel is 255. The grayscale weight value of the R sub-pixel in the first second display panel at time t0 is R_01, that is, the grayscale weight value of the R sub-pixel at time t0 when R_01 is 64 grayscale. Similarly, the grayscale weight value of the R sub-pixel in the second second display panel at time t0 is R_02, that is, the grayscale weight value of the R sub-pixel at time t0 when R_02 is 128 grayscale. The grayscale weight value of the R sub-pixel in the third second display panel at time t0 is R_03, that is, the grayscale weight value of the R sub-pixel at time t0 when R_03 is 255 grayscale. Similarly, R_n1 represents the grayscale weight value of the R sub-pixel at time tn under a grayscale level of 64. R_n2 represents the grayscale weight value of the R sub-pixel at time tn under a grayscale level of 128. R_n3 represents the grayscale weight value of the R sub-pixel at time tn under a grayscale level of 255. The grayscale weight values ​​corresponding to the G sub-pixel and the B sub-pixel are the same, and will not be elaborated further here.

[0190] Table 3 Gray Scale Weight Table

[0191] R64 R128 R255 G64 G128 G255 B64 B128 B255 t0 R_01 R_02 R_03 G_01 G_02 G_03 B_01 B_02 B_03 t1 R_11 R_12 R_13 G_11 G_12 G_13 B_11 B_12 B_13 …… …… …… …… …… …… …… …… …… …… tn R_n1 R_n2 R_n3 G_n1 G_n2 G_n3 B_n1 B_n2 B_n3

[0192] Optionally, the second reference brightness values ​​corresponding to sub-pixels of different emission colors are different, and the second reference brightness value is the brightness value of the corresponding sub-pixel at the initial moment under any second preset grayscale value.

[0193] Specifically, since the second display panel is not in use and is not affected by aging at the initial moment, the brightness value at the initial moment can be used as the second reference brightness value.

[0194] For example, a display panel may include R sub-pixels, G sub-pixels, and B sub-pixels, with a maximum grayscale value of 255. For instance, the second preset grayscale value corresponding to the third second target display panel is 255. For example, the initial brightness value c3_R_t0_lv of the R sub-pixel at a second reference brightness value of 255 grayscale is the brightness value of the R sub-pixel of the third second target display panel at the initial moment; the initial brightness value c3_G_t0_lv of the G sub-pixel at a second reference brightness value of 255 grayscale; and the initial brightness value c3_B_t0_lv of the B sub-pixel at a second reference brightness value of 255 grayscale. For example, if the brightness value of the R sub-pixel in the first second target display panel at time t0 is c1_R_t0_lv, then the grayscale weight of the R sub-pixel at time t0 is c1_R_t0_lv at a grayscale of 64. Similarly, for sub-pixels R at 64 gray levels, the corresponding gray level weight value at time tn is... The calculation method for the grayscale weight values ​​of G sub-pixels and B sub-pixels is the same as that for R sub-pixels, and will not be repeated here.

[0195] S730. Based on the grayscale weight value and gamma value of the sub-pixel of each emitting color at different times under different second preset grayscale values, determine the compensation value of the sub-pixel of each emitting color at different times under different second preset grayscale values, so as to determine the first correspondence.

[0196] Specifically, the compensation value can be determined based on the grayscale weight value and the gamma value, thus establishing the first correspondence. The compensation value can be a grayscale compensation value, which can be converted into a compensation data voltage to compensate the data voltage corresponding to the sub-pixel.

[0197] For example, the gamma value of the display panel is γ. For instance, if the brightness value of sub-pixel R in the first second target display panel at time t0 is c1_R_t0_lv, then the grayscale weight of sub-pixel R at time t1 in 64 grayscale levels is c1_R_t0_lv. Then, the compensation value of sub-pixel R at time t1 in 64 gray levels is... For example, if the gamma value of the display panel is 2.2, then Similarly, the calculation method for the compensation value of the R sub-pixel at other gray levels and at other times is the same as the calculation method for the compensation value C_R1. The calculation method for the compensation value of sub-pixels of other colors is the same as the calculation method for the compensation value C_R1, and will not be repeated here.

[0198] S740: Obtain the actual capacitance value of the display panel corresponding to the position of the sub-pixel, and determine the actual temperature value of the display panel corresponding to the position of the sub-pixel based on the relationship between the actual capacitance value and the capacitance temperature.

[0199] S750: The actual cumulative value is determined based on the usage time and the refresh rate of the display panel.

[0200] S760. Determine a first compensation value from a first correspondence based on the actual accumulated value, the emission color of the sub-pixel, and the target grayscale value; wherein, the first correspondence is the correspondence between the actual accumulated value, the emission color of the sub-pixel, the target grayscale value, and the compensation value.

[0201] S770 determines the actual cumulative value based on the usage time and the refresh rate of the display panel, determines the temperature weight value based on the actual temperature value, and updates the actual cumulative value based on the temperature weight value.

[0202] S780. Determine the second compensation value from the first correspondence based on the updated actual cumulative value, the emission color of the sub-pixel, and the target grayscale value.

[0203] S790: Based on the actual temperature value, compensate the data voltage corresponding to the sub-pixel according to the first compensation value and / or the second compensation value.

[0204] This invention also provides a compensation device for a display panel. Figure 10 This is a schematic diagram of the structure of a compensation device for a display panel provided in an embodiment of the present invention. (Refer to...) Figure 10 The compensation device for the display panel includes:

[0205] The temperature acquisition module 810 is used to acquire the actual capacitance value of the display panel corresponding to the position of the sub-pixel, and determine the actual temperature value of the display panel corresponding to the position of the sub-pixel based on the relationship between the actual capacitance value and the capacitance temperature.

[0206] The compensation module 820 is used to compensate the data voltage corresponding to the sub-pixel based on the actual temperature value of the sub-pixel.

[0207] The compensation device for the display panel is, for example, a driver chip corresponding to the display panel, or the driver chip includes a compensation device for the display panel.

[0208] The compensation device for the display panel provided in the embodiments of the present invention can execute the compensation method for the display panel provided in any embodiment of the present invention, and has the corresponding functional modules and beneficial effects of the method.

[0209] This embodiment also provides a display device. Figure 11 This is a schematic diagram of the structure of a display device provided in an embodiment of the present invention, for reference. Figure 11The display device includes a display panel 10 and a compensation device 20 for the display panel provided in any of the above embodiments. Since the display device includes the compensation device 20 for the display panel provided in any of the above embodiments, it possesses the same beneficial effects as the compensation device for the display panel provided in any of the embodiments of the present invention, and will not be elaborated further here. The display device can be any product or component with display function, such as a mobile phone, tablet computer, smart bracelet, television, monitor, laptop computer, digital photo frame, etc.

[0210] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0211] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A compensation method for a display panel, characterized in that, include: Obtain the actual capacitance value of the display panel corresponding to the position of the sub-pixel, and determine the actual temperature value of the display panel corresponding to the position of the sub-pixel based on the relationship between the actual capacitance value and the capacitance temperature. The data voltage corresponding to the sub-pixel is compensated based on the actual temperature value corresponding to the sub-pixel; The step of compensating the data voltage corresponding to the sub-pixel based on the actual temperature value of the sub-pixel includes: The first compensation value is determined based on the usage time of the display panel, the emission color of the sub-pixels, and the target grayscale value. The actual accumulated value is determined based on the usage duration, and the actual accumulated value is updated based on the actual temperature value. A second compensation value is determined based on the updated actual accumulated value, the emission color of the sub-pixel, and the target grayscale value. Based on the actual temperature value, the data voltage corresponding to the sub-pixel is compensated according to the first compensation value and / or the second compensation value; The step of compensating the data voltage corresponding to the sub-pixel based on the actual temperature value and according to the first compensation value and / or the second compensation value includes: When the actual temperature value is less than or equal to the temperature threshold, the data voltage corresponding to the sub-pixel is compensated according to the first compensation value or the second compensation value; When the actual temperature value of the display panel is greater than the temperature threshold, the data voltage corresponding to the sub-pixel is compensated according to the first compensation value and the second compensation value; The process of determining the actual accumulated value based on the usage duration, updating the actual accumulated value based on the actual temperature value, and determining the second compensation value based on the updated actual accumulated value, the emission color of the sub-pixel, and the target grayscale value includes: The actual cumulative value is determined based on the usage time and the refresh rate of the display panel, and a temperature weight value is determined based on the actual temperature value. The actual cumulative value is then updated based on the temperature weight value. The second compensation value is determined from the first correspondence based on the updated actual cumulative value, the emission color of the sub-pixel, and the target grayscale value; wherein the temperature weight value is determined from the second correspondence based on the usage duration and the actual temperature value. The step of determining the first compensation value based on the usage time of the display panel, the emission color of the sub-pixels, and the target grayscale value includes: The actual cumulative value is determined based on the usage duration and the refresh rate of the display panel; The first compensation value is determined from the first correspondence relationship based on the actual accumulated value, the emission color of the sub-pixel, and the target grayscale value; wherein, the first correspondence relationship is the correspondence relationship between the actual accumulated value, the emission color of the sub-pixel, the target grayscale value, and the compensation value. Before determining the first compensation value based on the usage time of the display panel, the emission color of the sub-pixels, and the target grayscale value, the method further includes: Obtain the brightness variation relationship of sub-pixels of each emitting color for multiple second target display panels with the same structure as the display panel at corresponding second preset grayscale values; wherein, the second preset grayscale values ​​are different for different second target display panels; The brightness values ​​of the sub-pixels at different times are determined according to the corresponding brightness change relationship, and the grayscale weight values ​​of the sub-pixels of each luminous color in the second target display panel at different times are determined according to the ratio of the brightness value of the sub-pixels of each luminous color to the second reference brightness value at different times under the corresponding second preset grayscale value. Based on the grayscale weight value and gamma value of each luminous color sub-pixel at different times under different second preset grayscale values, the compensation value of each luminous color sub-pixel at different times under different second preset grayscale values ​​is determined to determine the first correspondence. Wherein, the grayscale weight value is the ratio of the brightness value of the sub-pixel to the second reference brightness value multiplied by the maximum grayscale value of the display panel; the compensation value corresponding to the grayscale weight value is the reciprocal of the gamma value of the ratio of the grayscale weight value to the maximum grayscale value, multiplied by the maximum grayscale value.

2. The method according to claim 1, characterized in that, The step of compensating the data voltage corresponding to the sub-pixel based on the first compensation value and the second compensation value includes: The data voltage of the sub-pixel is compensated according to the second compensation value to obtain the first compensation voltage; The first compensation voltage is compensated according to the first compensation value to obtain the compensated data voltage.

3. The method according to claim 1, characterized in that, The step of determining the actual cumulative value based on the usage duration and the refresh rate of the display panel includes: The product of the usage duration and the refresh rate is used as the actual cumulative value.

4. The method according to claim 2, characterized in that, The first correspondence is the correspondence between the actual cumulative value, the emission color of the sub-pixel, the target grayscale value, and the compensation value.

5. The method according to claim 4, characterized in that, The step of determining the actual cumulative value based on the usage duration and the refresh rate of the display panel, determining a temperature weight value based on the actual temperature value, and updating the actual cumulative value based on the temperature weight value includes: The product of the usage duration and the refresh frequency is taken as the actual cumulative value; Based on the usage duration and the actual temperature value, a temperature weight value is determined from a second correspondence; wherein, the second correspondence is the correspondence between the actual temperature value, the usage duration, and the temperature weight value; The product of the actual cumulative value and the temperature weight value is used as the updated actual cumulative value.

6. The method according to claim 1, characterized in that, The display panel is divided into multiple areas, and the capacitance-temperature relationship is different for different areas. Determining the actual temperature value of the display panel corresponding to the position of the sub-pixel based on the relationship between the actual capacitance value and capacitance temperature includes: The region where the sub-pixel is located is determined based on the position of the sub-pixel, and the actual temperature value of the display panel corresponding to the position of the sub-pixel is determined based on the capacitance-temperature relationship corresponding to the region where the sub-pixel is located and the actual capacitance.

7. The method according to claim 1, characterized in that, Before obtaining the actual capacitance value of the display panel corresponding to the position of the sub-pixel, the process also includes: Drive the display panel to display a preset image; Obtain the capacitance values ​​of the display panel at different temperatures, and determine the capacitance-temperature relationship based on the capacitance values ​​of the display panel at different temperatures; Alternatively, the capacitance value of each area of ​​the display panel at different temperatures can be obtained, and the capacitance-temperature relationship corresponding to each area can be determined based on the capacitance value of the display panel at different temperatures.

8. The method according to claim 7, characterized in that, The step of obtaining the capacitance value of the display panel at different temperatures includes: At each temperature, initial capacitance values ​​are obtained at multiple different locations of the display panel, and the average of the multiple initial capacitance values ​​is taken as the capacitance value of the display panel at the corresponding temperature.

9. The method according to claim 8, characterized in that, At each temperature, initial capacitance values ​​are obtained at multiple different locations on the display panel, and the average of these initial capacitance values ​​is taken as the capacitance value of the display panel at the corresponding temperature, including: At an initial temperature, the initial capacitance values ​​at multiple different locations of the display panel are obtained, and the average value of the multiple initial capacitance values ​​is taken as the capacitance value of the display panel at the corresponding temperature. The initial temperature is updated based on the temperature step value, and the process returns to the step of obtaining the initial capacitance values ​​at multiple different locations of the display panel at the initial temperature, until the initial temperature reaches the temperature set value, so as to obtain the capacitance values ​​of the display panel at different temperatures.

10. The method according to claim 7, characterized in that, Driving the display panel to display a preset image includes: The display panel is driven to display the primary color image according to the first preset grayscale value.

11. The method according to claim 4, characterized in that, Before obtaining the actual capacitance value of the display panel corresponding to the position of the sub-pixel, the process also includes: Obtain the brightness variation relationship of multiple first target display panels with the same structure as the display panel at corresponding preset temperatures; wherein, the brightness variation relationship is the brightness variation relationship of the first target display panel over time; different first target display panels correspond to different preset temperatures; The brightness values ​​of the first target display panel at different times are determined based on the corresponding brightness change relationship, and the temperature weight values ​​at different times under the corresponding preset temperature are determined based on the ratio of the brightness value of the first target display panel at different times to the first reference brightness value, so as to determine the second correspondence relationship.

12. The method according to claim 11, characterized in that, The first reference brightness value is the brightness value of any of the first target display panels at the initial moment.

13. The method according to claim 1, characterized in that, The second reference brightness value is different for sub-pixels of different emission colors. The second reference brightness value is the brightness value of the corresponding sub-pixel at the initial moment under any second preset grayscale value.

14. A compensation device for a display panel, characterized in that, The compensation device for the display panel is used to perform the compensation method for the display panel according to any one of claims 1-13; The compensation device for the display panel includes: The temperature acquisition module is used to acquire the actual capacitance value of the display panel corresponding to the position of the sub-pixel, and determine the actual temperature value of the display panel corresponding to the position of the sub-pixel based on the actual capacitance value and the capacitance-temperature relationship. A compensation module is used to compensate the data voltage corresponding to the sub-pixel based on the actual temperature value corresponding to the sub-pixel; the compensation module is used to determine a first compensation value based on the usage time of the display panel, the emission color of the sub-pixel, and the target grayscale value; determine an actual cumulative value based on the usage time, update the actual cumulative value based on the actual temperature value, and determine a second compensation value based on the updated actual cumulative value, the emission color of the sub-pixel, and the target grayscale value; when the actual temperature value is less than or equal to a temperature threshold, compensate the data voltage corresponding to the sub-pixel based on the first compensation value or the second compensation value; when the actual temperature value is less than or equal to a temperature threshold, compensate the data voltage corresponding to the sub-pixel based on the first compensation value or the second compensation value; When the actual temperature value of the display panel is greater than the temperature threshold, the data voltage corresponding to the sub-pixel is compensated according to the first compensation value and the second compensation value; the compensation module is used to determine the actual cumulative value according to the usage time and the refresh rate of the display panel, and determine the temperature weight value based on the actual temperature value, and update the actual cumulative value based on the temperature weight value; the second compensation value is determined from the first correspondence according to the updated actual cumulative value, the emission color of the sub-pixel and the target grayscale value; wherein, the temperature weight value is determined from the second correspondence according to the usage time and the actual temperature value.

15. A display device, characterized in that, Includes a display panel and a compensation device for the display panel as described in claim 14.

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