Brightness compensation method and adjustment method for display panel, and display apparatus

Abstract

Disclosed are a brightness compensation method and adjustment method for a display panel, and a display apparatus. The brightness compensation method for a display panel comprises: when a display panel is in a partitioned multi-refresh-rate display mode, acquiring display data of a region to be subjected to compensation (S110); and on the basis of the display data of said region, determining a target drive value of said region (S120). When the display panel is in a multi-refresh-rate display mode, the display panel comprises at least two display partitions having different refresh rates, and the position of said region is related to the position of a boundary of corresponding display partitions having different refresh rates.

Description

Display panel brightness compensation method, adjustment method, and display device

[0001] This application claims priority to Chinese Patent Application No. 202411579674.1, filed with the Chinese Patent Office on November 5, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of display technology, and for example to a brightness compensation method, adjustment method and display device for a display panel. Background Technology

[0003] With the development of display technology, people have increasingly higher requirements for the display effect of display panels. Currently, at least two sub-display areas with different refresh rates can be displayed on the same display screen, i.e., multi-frequency display. However, in the case of multi-frequency display, there are problems with poor display quality. Summary of the Invention

[0004] This application provides a brightness compensation method, adjustment method, and display device for a display panel, which can improve the problem of uneven display brightness in the case of multi-frequency display in a zoned display.

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

[0006] When the display panel is a multi-frequency display with partitions, the target driving value of the area to be compensated is determined based on the display data of the area to be compensated. In the case of a multi-frequency display with partitions, the display panel includes at least two display partitions with different refresh rates. The position of the area to be compensated is related to the position of the boundary line of the corresponding display partitions with different refresh rates.

[0007] According to another aspect of this application, a display device is provided, which includes a display panel and a driving module;

[0008] The driver module is configured to determine the target drive value of the area to be compensated based on the display data of the area to be compensated when the display panel is a multi-frequency display with partitions. In the case of multi-frequency display with partitions, the display panel includes at least two display partitions with different refresh rates. The position of the area to be compensated is related to the position of the boundary line of the corresponding display partitions with different refresh rates.

[0009] According to another aspect of this application, a debugging method for a display panel is provided, the debugging method comprising:

[0010] The first compensation value is determined based on the row number of the sub-pixels in the area to be compensated, the display gray level, and the first compensation table, wherein the first compensation table includes the first compensation values ​​corresponding to multiple rows at various display gray levels.

[0011] The second compensation value is determined based on the display grayscale and display brightness level of the sub-pixels in the area to be compensated;

[0012] Based on the first compensation value and the second compensation value, the target driving value of the area to be compensated is determined; wherein, the display panel includes at least two display partitions with different refresh rates; the position of the area to be compensated is related to the position of the boundary line of the corresponding display partitions with different refresh rates;

[0013] When the display uniformity of the display panel does not meet the requirements, for the same display brightness level and display gray level, the position of the dividing line is adjusted to obtain the brightness of the area to be compensated when the dividing line is located at different positions.

[0014] Based on the brightness difference or the average of the brightness difference between the area to be compensated and the reference brightness when the dividing line is located at different positions, the first compensation value and / or the second compensation value are corrected until the display uniformity of the display panel meets the requirements. Attached Figure Description

[0015] Figure 1 is a schematic diagram of a display panel displaying the same grayscale image;

[0016] Figure 2 is a schematic diagram of a pixel circuit according to an embodiment of this application;

[0017] Figure 3 is a waveform diagram showing the level change of the partition enable signal when the scanning process moves from a display partition with a low refresh rate to a display partition with a high refresh rate.

[0018] Figure 4 is a flowchart illustrating a brightness compensation method for a display panel according to an embodiment of this application;

[0019] Figure 5 is a flowchart illustrating another brightness compensation method for a display panel according to an embodiment of this application;

[0020] Figure 6 is a flowchart illustrating another brightness compensation method for a display panel according to an embodiment of this application;

[0021] Figure 7A is a schematic diagram of the structure of a display panel according to an embodiment of this application;

[0022] Figure 7B is a schematic diagram of the structure of another display panel provided according to an embodiment of this application;

[0023] Figure 7C is a schematic diagram of the structure of another display panel provided according to an embodiment of this application;

[0024] Figure 8 is a schematic diagram of the transition of the partition enable signal in the first display frame and the second display frame according to an embodiment of this application;

[0025] Figure 9 is a schematic diagram of a shift register according to an embodiment of this application;

[0026] Figure 10 is a schematic diagram showing the relationship between a scanning signal, a shift signal output by a shift unit, and a signal on a partition enable signal line in a first display frame, according to an embodiment of this application.

[0027] Figure 11 is a schematic diagram showing the relationship between a scan signal, a shift signal, and a signal on a partition enable signal line in a second display frame, according to an embodiment of this application.

[0028] Figure 12 is a schematic diagram of a display device according to an embodiment of this application;

[0029] Figure 13 is a flowchart illustrating a debugging method for a display panel according to an embodiment of this application;

[0030] Figure 14 is a schematic diagram of the brightness of a display panel when the dividing line is located in the second display sub-area, according to an embodiment of this application.

[0031] Figure 15 is a schematic diagram of the brightness of a display panel when the dividing line is located in the first display sub-area, according to an embodiment of this application.

[0032] Figure 16 is a schematic diagram of the brightness of a display panel when the dividing line is located in the third display sub-area, according to an embodiment of this application.

[0033] Figure 17 is a schematic diagram of a display panel debugging device provided according to an embodiment of this application. Detailed Implementation

[0034] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application 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 this application 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.

[0035] In related technologies, when the refresh rate of the upper, middle, and lower partitions of the display panel is inconsistent when the partition refresh function is enabled, it causes uneven display issues such as dark or bright bands in some display areas. For example, Figure 1 is a schematic diagram of a display panel displaying the same grayscale image in related technologies. Referring to Figure 1, the refresh rates of the upper, middle, and lower display areas of the display panel are 1Hz, 120Hz, and 1Hz, respectively. When moving from a 1Hz to a 120Hz display partition, the first part of the sub-pixel rows of the higher refresh rate display partition appears darker, for example, the area within the dashed box in Figure 1 appears darker. Figure 2 is a schematic diagram of a pixel circuit according to an embodiment of this application. Referring to Figure 2, the pixel driving circuit includes a threshold compensation unit 120. The control terminal of the threshold compensation unit 120 is configured to receive the output signal of the first gate driving circuit. The pulse frequency of the output signal of the first gate driving circuit can be controlled by a partition enable signal. Figure 3 is a schematic diagram of the level change waveform of the partition enable signal when transitioning from a low refresh rate display partition to a high refresh rate display partition. Referring to Figure 3, the display panel includes partition enable signal lines, and each partition enable signal line can receive the partition enable signal output by the chip. The reason why display zones with high refresh rates appear darker is that during the scanning process of a local refresh frame, when moving from a display zone with a low refresh rate (e.g., 1Hz) to a display zone with a high refresh rate (120Hz), a zone enable signal is required. The change from a low level to a high level corresponds to the time period in a partial refresh frame that corresponds to the display partition with a low refresh rate (e.g., 1Hz). During this period, the partition enable signal is at a disabled level, such as a low level, so that the first gate drive circuit does not output a conduction pulse to the display partition with the low refresh rate, and continuously outputs the off level of the threshold compensation unit 120. During the scan period corresponding to the display partition with a high refresh rate (e.g., 120Hz), the partition enable signal... An enable level, such as a high level, is used to cause the first gate drive circuit to output a turn-on pulse to the display partition with a high refresh rate, thereby turning on the threshold compensation unit 120, but the partition enable signal... It cannot switch directly from low to high level; there is a certain delay (as shown in Figure 3, the partition enable signal). The rising process is a delayed process, which causes the first part of the sub-pixel row of the high refresh rate display zone to appear darker, resulting in an abnormality. The high voltage of the gate of the transistor in the threshold compensation unit 120 is lower than that of the subsequent stable state, and the pull-down coupling of the transistor in the threshold compensation unit 120 is weaker, which causes the first part of the sub-pixel row to appear darker, resulting in an abnormality.

[0036] This embodiment provides a brightness compensation method for a display panel, which can improve the problem of uneven display in the case of multi-frequency display in different zones. Figure 4 is a schematic flowchart of a brightness compensation method for a display panel according to an embodiment of this application. Referring to Figure 4, the brightness compensation method provided in this embodiment includes the following steps:

[0037] S110. When the display panel is a multi-frequency zone display, obtain the display data of the area to be compensated.

[0038] For example, multi-frequency display in a display panel refers to a situation where at least two display zones on the same screen have different refresh rates. Before brightness compensation, the brightness of the area to be compensated differs from the brightness of most other display areas. For example, continuing to refer to Figure 1, when the refresh rates of the first and second display zones in the display panel are 1Hz and 120Hz respectively, a dark band will appear in the second display zone with a refresh rate of 120Hz. This dark band is the area to be compensated. For example, the shift register in the first gate drive circuit connected to the first display zone can be the pre-stage of the shift register in the first gate drive circuit connected to the second display zone.

[0039] The area to be compensated may include multiple rows of sub-pixels, or at least one row of sub-pixels. The area to be compensated may be a dark band or a bright band. The brightness compensation method provided in this embodiment can improve the display problems of bright and dark bands when the display panel is displayed.

[0040] Display data is data related to the display brightness of sub-pixels in the area to be compensated. Display data can include the display grayscale corresponding to multiple sub-pixels in the area to be compensated, or it can include the display brightness value (DBV) corresponding to the display grayscale and the display brightness level of each sub-pixel. Mobile phones, computers, and other display devices typically include brightness adjustment buttons, which users use to change the input display brightness level. Different DBVs correspond to different brightness levels for the same grayscale. For example, the larger the DBV, the greater the brightness corresponding to the maximum grayscale.

[0041] S120. Determine the target driving value of the area to be compensated based on the displayed data of the area to be compensated.

[0042] In the case of a multi-frequency display panel, the display panel includes at least two display zones with different refresh rates; the position of the area to be compensated is related to the position of the boundary line of the corresponding display zones with different refresh rates.

[0043] For example, the refresh rates of the display partitions on both sides of the dividing line are different. For example, the refresh rate of the display partition on one side of the dividing line can be 1Hz, 5Hz or 10Hz, etc., and the refresh rate of the display partition on the other side of the dividing line can be 60Hz, 90Hz or 120Hz, etc.

[0044] The area to be compensated can be located on at least one side of the boundary line, or it can cover the boundary line. In a partial refresh frame, the display brightness of the display area adjacent to the boundary line is usually inconsistent with the display brightness of most other display areas. Therefore, brightness compensation is required for the display area adjacent to the boundary line. In this embodiment, the position of the area to be compensated is set to be related to the position of the boundary line. The position of the area to be compensated can be determined according to the position of the boundary line, so that the area to be compensated is adjacent to and / or overlaps with the boundary line, thereby accurately compensating the display area that needs compensation and improving the display effect. For example, the position of the area to be compensated changes with the position of the corresponding boundary line on the display panel, and the relative position of the area to be compensated and the corresponding boundary line remains unchanged. For example, the distance and / or relative position of the starting row sub-pixel of the area to be compensated and the corresponding boundary line remains unchanged.

[0045] The target driving value of the area to be compensated includes the target driving values ​​of at least some sub-pixels within that area. Before determining the target driving value, each sub-pixel in the area to be compensated has its corresponding original driving data. When the area to be compensated is driven by the original driving data, issues such as dark bands and bright bands may appear. To improve these issues, this embodiment first determines the driving compensation value of the sub-pixels in the area to be compensated based on the display data of the area to be compensated, and then determines the target driving value based on the driving compensation value and the original driving data. Driving the sub-pixels with the target driving value ensures that the difference between the sub-pixel's display brightness and the target display brightness is within a set range, thereby improving the display effect of the display panel. For example, the driving compensation value of the target driving value is related to the display data. Based on the display data of the area to be compensated, the target driving value of the area to be compensated after compensation is determined. The display data may include display grayscale and / or display brightness levels.

[0046] This embodiment provides a brightness compensation method for a display panel. The method includes: when the display panel is a multi-frequency display with partitioned zones, determining a target driving value for the area to be compensated based on display data of the area to be compensated. In the case of a multi-frequency display with partitioned zones, the display panel includes at least two display partitions with different refresh rates. The position of the area to be compensated is related to the position of the boundary line between the display partitions with different refresh rates. The area to be compensated may be adjacent to and / or overlap with the boundary line, thereby enabling brightness compensation for the display area related to the boundary line position and reducing the brightness difference between the vicinity of the boundary line and most other display areas. Since the display data reflects the display status of the sub-pixels in the area to be compensated, the target driving value determined based on the display data is related to the display status of the sub-pixels, thus more accurately improving the display effect in the area to be compensated. Driving the display of the sub-pixels in the area to be compensated with the target driving value can make the display brightness of the sub-pixels close to the target display brightness, thereby improving the problem of uneven display brightness in the case of multi-frequency display with partitioned zones.

[0047] Optionally, the displayed data includes displaying grayscale.

[0048] For example, display grayscale is related to display brightness. Determining the target drive value based on the display grayscale allows for more accurate brightness compensation in the area to be compensated. For instance, determining the drive compensation value based on the display grayscale allows for more accurate brightness compensation in the area to be compensated. For instance, the drive compensation value of the target drive value is related to the display grayscale. For instance, the drive compensation value of the target drive value is different at at least two display grayscale levels.

[0049] The display grayscale can include all display grayscale levels from the minimum to the maximum display grayscale, such as all display grayscale levels from 0 to 255. This allows for precise determination of the target driving value corresponding to each display grayscale level in the area to be compensated, improving the compensation effect. The display grayscale can also include a subset of display grayscale levels from 0 to 255. Determining the target driving value or driving compensation value for a subset of display grayscale levels reduces the storage space required for storing the target driving value on the display device. The target driving value or driving compensation value corresponding to the remaining display grayscale levels can be determined using an interpolation algorithm.

[0050] Optionally, Figure 5 is a schematic flowchart of another brightness compensation method for a display panel according to an embodiment of this application. Referring to Figure 5, the brightness compensation method provided in this embodiment includes the following steps:

[0051] S210. When the display panel is a multi-frequency display with partitions, determine the first compensation value based on the display grayscale of the sub-pixels of the area to be compensated.

[0052] For example, the first compensation value corresponds to the display grayscale, and different display grayscales can correspond to different first compensation values. Different display grayscales can also correspond to the same first compensation value.

[0053] S220. Determine the target driving value of the area to be compensated based on the first compensation value.

[0054] For example, the target driving value can be determined solely based on the first compensation value. Alternatively, if the sub-pixels of the region to be compensated have original driving data, the target driving value can also be determined based on both the original driving data and the first compensation value.

[0055] Optionally, the display grayscale includes a first display grayscale and a second display grayscale, and the area to be compensated includes multiple sub-pixels, wherein each sub-pixel in at least a portion of the sub-pixels in the area to be compensated has a different first compensation value corresponding to the first display grayscale and the second display grayscale.

[0056] For example, the first display grayscale and the second display grayscale are not equal. Before compensation, the actual display brightness of the sub-pixels displaying the first display grayscale is different from the actual display brightness of the sub-pixels displaying the second display grayscale. This embodiment sets different first compensation values ​​for different display grayscales, which can avoid the problem of poor brightness compensation of the display panel caused by the same first compensation value for different display grayscales.

[0057] Optionally, the area to be compensated includes multiple rows of sub-pixels;

[0058] In S210 above, the first compensation value is determined based on the display grayscale of the sub-pixels of the area to be compensated, including:

[0059] A first compensation value is determined based on the row number of the sub-pixels in the area to be compensated, the display grayscale, and the first compensation table. The first compensation table includes the first compensation values ​​corresponding to multiple rows at various display grayscales.

[0060] For example, the first compensation table may include the first compensation value of each row of sub-pixels in the area to be compensated under different display gray levels, or it may include the first compensation values ​​of some rows of sub-pixels in the area to be compensated under different display gray levels. For example, Table 1 below may be the first compensation table provided in this embodiment. Table 1 includes the first compensation values ​​of multiple rows of sub-pixels in the area to be compensated under different display gray levels, such as gray01 to gray47. The first compensation value can be positive or negative. When there is a dark band area in the area to be compensated, the first compensation value can be negative.

[0061] The first register value in Table 1 can be converted into a display grayscale, and different first register values ​​correspond to different display grayscales.

[0062]

[0063] The first compensation table includes the first compensation values ​​for sub-pixels in different rows of the area to be compensated under different display grayscale levels. After determining the row number and display grayscale of the sub-pixel, the first compensation value is determined by querying the first compensation table. For example, referring to Table 1, if the row number of the sub-pixel is 4 and the display grayscale is 128, then the first compensation value can be determined as -5 by querying the first compensation table. When the display grayscale cannot be found in the first compensation table, the first compensation value can be determined based on the known first compensation values ​​of the display grayscale in the first compensation table and the interpolation algorithm.

[0064] Optionally, the first compensation value corresponding to each sub-pixel of the i-th row of the region to be compensated in various display gray levels is the first compensation value of the i-th row in the first compensation table; i is an integer greater than or equal to 1. For example, if the region to be compensated is located on one side of the boundary line, the starting row of the region to be compensated can correspond to the starting row in the first compensation table.

[0065] Optionally, the first compensation value of the Xth row sub-pixel in the area to be compensated corresponding to the first display grayscale is different from the first compensation value of the Yth row sub-pixel in the area to be compensated corresponding to the first display grayscale, and / or, the first compensation value of the Xth row sub-pixel in the area to be compensated corresponding to the second display grayscale is different from the first compensation value of the Yth row sub-pixel in the area to be compensated corresponding to the second display grayscale, where X and Y are different positive integers. This setting indicates that the first compensation values ​​of different rows of sub-pixels are different in the first display grayscale and different rows of sub-pixels are different in the second display grayscale. Referring to Figures 2 and 3, since the voltage magnitude of the partition enable signal changes during the transition from low to high level, there is a delay and the rise speed is relatively slow. Therefore, during the rise of the partition enable signal, the voltage magnitude of the scan pulse related to the voltage of the partition enable signal received by the threshold compensation unit 120 of the pixel circuit in different rows of sub-pixels near the boundary line is different. This results in different opening degrees of the threshold compensation unit 120, different degrees of data voltage being written to the driving transistors in the pixel circuits of different rows of sub-pixels, and / or different degrees of the high voltage of the gate of the transistor in the threshold compensation unit 120 being lower than the subsequent stable state. Therefore, by setting different first compensation values ​​for different rows of sub-pixels under the same display grayscale, targeted compensation can be performed according to the voltage change of the partition enable signal, further improving the brightness compensation effect of the display panel.

[0066] Optionally, the first display grayscale is smaller than the second display grayscale, and for each sub-pixel in at least a portion of the sub-pixels in the area to be compensated, the absolute value of the first compensation value corresponding to the first display grayscale is greater than the absolute value of the first compensation value corresponding to the second display grayscale. For example, the absolute value of the driving compensation value corresponding to the first display grayscale is greater than the absolute value of the driving compensation value corresponding to the second display grayscale.

[0067] For example, the larger the absolute value of the first compensation value, the greater the degree of brightness compensation for the sub-pixel. Before brightness compensation, compared to the actual display brightness of the sub-pixel under the second display grayscale, the actual display brightness of the sub-pixel under the first display grayscale is darker. In this embodiment, setting a large absolute value of the first compensation value corresponding to the first display grayscale can improve the brightness compensation effect of the sub-pixel under the first display grayscale and reduce the difference between the brightness of the sub-pixel displaying the first display grayscale and the brightness of the sub-pixel displaying the second display grayscale after compensation. For low-brightness, low-grayscale scenes, the more obvious the dark band near the boundary line, the larger the absolute value of the first compensation value. The larger the absolute value of the driving compensation value, the greater the degree of brightness compensation for the sub-pixel. For low-brightness, low-grayscale scenes, the more obvious the dark band near the boundary line, the larger the absolute value of the driving compensation value.

[0068] In other optional embodiments of this application, the first display grayscale is smaller than the second display grayscale, and each sub-pixel in at least a portion of the sub-pixels in the area to be compensated has an absolute value of the first compensation value corresponding to the first display grayscale that is smaller than the absolute value of the first compensation value corresponding to the second display grayscale.

[0069] Optionally, in step S220 above, determining the target driving value of the region to be compensated based on the first compensation value includes:

[0070] Based on the first compensation value of the sub-pixel in the region to be compensated, determine the driving compensation value corresponding to the sub-pixel;

[0071] The target driving value of a sub-pixel is determined based on the driving compensation value and the original driving value of the sub-pixel; wherein, the original driving value is related to the display grayscale of the sub-pixel.

[0072] For example, sub-pixels in the area to be compensated may have problems such as dark bands and bright bands when driven only by the original driving value. In order to improve the above problems, this embodiment compensates the original driving value by driving compensation value. For example, the target driving value can be determined according to the sum of the driving compensation value and the original driving value. On the basis of the original driving value, the driving compensation value is increased, thereby improving the display effect of the display panel.

[0073] Optionally, at least two display partitions include an adjacent first display partition and a second display partition. The refresh rate of the first display partition is lower than that of the second display partition. The area to be compensated includes a first area to be compensated, the position of which is related to the position of the boundary line between the first and second display partitions. At least a portion of the first area to be compensated is located within the second display partition, and the first area to be compensated is located within at least a portion of the sub-pixels in the second display partition. Under the same display grayscale, the closer the sub-pixel is to the boundary line between the first and second display partitions, the larger the absolute value of the first compensation value corresponding to the sub-pixel. The first area to be compensated is located within at least a portion of the sub-pixels in the second display partition. Under the same display grayscale, the closer the sub-pixel is to the boundary line between the first and second display partitions, the larger the absolute value of the driving compensation value corresponding to the sub-pixel.

[0074] For example, at the same grayscale level, subpixels closer to the dividing line display worse. To improve the display of subpixels closer to the dividing line, setting a larger absolute value for the first compensation value of the closer subpixel can improve the compensation effect and further improve the display panel's performance. (Zone enable signal) During the transition from low to high level, the sub-pixel closer to the boundary line corresponds to the partition enable signal at the output time of its scan pulse. The lower the instantaneous voltage, the closer the sub-pixel is to the boundary line, and the higher the corresponding partition enable signal at the output time of the scan pulse. The larger the absolute value of the voltage difference between the instantaneous voltage and the steady-state voltage, that is, the closer the sub-pixel is to the boundary line, the greater the amplitude of the scanning pulse (equal to the partition enable signal). The lower the absolute value of the instantaneous voltage, the greater the degree to which the high voltage of the gate of the transistor in the threshold compensation unit 120 is lower than the subsequent stable state. Therefore, the sub-pixels closer to the boundary line have a worse display condition, for example, they are darker. Thus, the absolute value of the first compensation value corresponding to the sub-pixels closer to the boundary line is larger.

[0075] Optional,

[0076] in, As the driving compensation value, gray is the first compensation value. The first reference voltage, k1 is the second reference voltage and k1 is the preset register value.

[0077] For example, k1 can be 4096. The first reference voltage and the second reference voltage can be fixed values. The first compensation value can be obtained by querying the first compensation table. It can be seen that the method for determining the driving compensation value is simple and can be determined quickly, thereby improving the brightness compensation efficiency of the display panel.

[0078] Optionally, the display data includes grayscale and brightness level.

[0079] For example, the target driving value can be determined based on both the display grayscale and the display brightness level. This improves the accuracy of determining the target driving value, thereby enhancing the compensation effect of the display area to be compensated and further improving the display effect of the display panel. For instance, the driving compensation value is determined based on the display grayscale and display brightness level of the area to be compensated. The driving compensation value of the target driving value is related to the display grayscale and display brightness level. For example, the driving compensation value of the target driving value is different at least two display grayscale levels under the same preset display brightness level (e.g., the first display brightness level or the second display brightness level).

[0080] For example, the brightness compensation method provided in this embodiment includes the following steps: when the display panel is a multi-frequency display with partitions, a first compensation value is determined based on the display grayscale of the sub-pixels of the area to be compensated; a second compensation value is determined based on the display grayscale and display brightness level of the sub-pixels of the area to be compensated; and a target driving value of the area to be compensated is determined based on the first compensation value and the second compensation value.

[0081] Optionally, the area to be compensated includes multiple rows of sub-pixels.

[0082] Figure 6 is a flowchart illustrating another brightness compensation method for a display panel according to an embodiment of this application. Referring to Figure 6, the brightness compensation method provided in this embodiment includes the following steps:

[0083] S310. When the display panel is a multi-frequency zone display, determine the first compensation value based on the row number of the sub-pixel of the area to be compensated, the display grayscale, and the first compensation table.

[0084] The first compensation table includes multiple rows of first compensation values ​​corresponding to various display grayscale levels.

[0085] S320. Determine the second compensation value based on the display grayscale and display brightness level of the sub-pixels of the area to be compensated.

[0086] For example, the second compensation value is determined jointly based on the display grayscale and the display brightness level, which can make the determined second compensation value more accurate, thereby accurately compensating for the display brightness of sub-pixels and improving the compensation effect.

[0087] The second compensation value can be determined based on the display grayscale, display brightness level, and second compensation table of the sub-pixels in the area to be compensated. Table 2 below shows one such second compensation table, which includes a first register value and a second register value. The first register value can be converted into a display grayscale, and the second register value can be converted into the maximum display brightness among the display brightness levels. After determining the display grayscale and display brightness level, the second compensation value can be determined by looking up the second compensation table. If the corresponding display grayscale and display brightness level are not found in the second compensation table, the second compensation value not found in the table can be determined using an interpolation algorithm based on the known second compensation values ​​in the table, such as gain01 to gain55.

[0088]

[0089]

[0090] S330. Determine the target driving value of the area to be compensated based on the first compensation value and the second compensation value.

[0091] For example, the target driving value can be determined by the first compensation value and the second compensation value, which can improve the determination accuracy of the target driving value, thereby improving the compensation effect of the area to be compensated and further improving the display effect of the display panel.

[0092] Optionally, the display grayscale includes a first display grayscale and a second display grayscale, and the display brightness level includes a first display brightness level and a second display brightness level. For each sub-pixel in at least a portion of the sub-pixels in the area to be compensated, the absolute value of the second compensation value corresponding to the first display grayscale at the first display brightness level is different from the absolute value of the second compensation value corresponding to the first display grayscale at the second display brightness level; and / or, the absolute value of the second compensation value corresponding to the first display grayscale at the first display brightness level is different from the absolute value of the second compensation value corresponding to the second display grayscale at the first display brightness level; the absolute value of the second compensation value corresponding to the second display grayscale at the first display brightness level is different from the absolute value of the second compensation value corresponding to the second display grayscale at the second display brightness level; and / or, the absolute value of the second compensation value corresponding to the first display grayscale at the second display brightness level is different from the absolute value of the second compensation value corresponding to the second display grayscale at the second display brightness level.

[0093] For example, the first display brightness level and the second display brightness level are different. Before brightness compensation is performed on the sub-pixels, the actual display brightness of the same display grayscale is different at different display brightness levels, and the actual display brightness of different display grayscales at the same display brightness level is different. In this embodiment, the absolute values ​​of the second compensation values ​​corresponding to the same display grayscale are set to be different at different display brightness levels, and the absolute values ​​of the second compensation values ​​corresponding to different display grayscales at the same display brightness level are set to be different. This allows for corresponding compensation based on the actual display brightness, improving the brightness compensation effect of the area to be compensated, and thus improving the display effect of the display panel.

[0094] Optionally, the first display grayscale is smaller than the second display grayscale, and each sub-pixel in at least a portion of the sub-pixels in the area to be compensated has an absolute value of the second compensation value corresponding to the first display grayscale that is greater than the absolute value of the second compensation value corresponding to the second display grayscale at the same display brightness level (e.g., the first display brightness level or the second display brightness level).

[0095] Optionally, the first display brightness level is lower than the second display brightness level, the brightness of the sub-pixel corresponding to the maximum gray level at the first display brightness level is lower than the brightness of the maximum gray level at the second display brightness level, and each sub-pixel in at least a portion of the sub-pixels in the area to be compensated has an absolute value of the second compensation value corresponding to the first display brightness level greater than the absolute value of the second compensation value corresponding to the second display brightness level at the same display gray level (e.g., the first display gray level or the second display gray level).

[0096] For example, before brightness compensation, at the same display brightness level, the actual display brightness of sub-pixels at the first display grayscale is darker than that at the second display grayscale. In this embodiment, the absolute value of the first compensation value corresponding to the first display grayscale is set to be larger at the same display brightness level, which can improve the brightness compensation effect of the sub-pixels at the first display grayscale and reduce the difference between the brightness of the sub-pixels displaying the first display grayscale and the brightness of the sub-pixels displaying the second display grayscale after compensation. For low-brightness, low-grayscale scenes, the more obvious the dark band is near the boundary line, the larger the absolute value of the second compensation value should be.

[0097] Before brightness compensation, at the same display grayscale, the actual display brightness of sub-pixels at the first display brightness level is darker than that at the second display brightness level. This embodiment sets a larger absolute value for the first compensation value corresponding to the first display brightness level at the same display grayscale, which can improve the brightness compensation effect of sub-pixels at the first display brightness level and reduce the difference between the brightness of sub-pixels at the first and second display brightness levels after compensation. For low-brightness, low-grayscale scenes, the more pronounced the dark bands near the boundary, the larger the absolute value of the second compensation value.

[0098] Optionally, S330, based on the first compensation value and the second compensation value, determines the target driving value of the area to be compensated, including:

[0099] Based on the first and second compensation values ​​of the sub-pixels in the region to be compensated, determine the driving compensation value corresponding to the sub-pixel;

[0100] The target driving value of a sub-pixel is determined based on the driving compensation value and the original driving value of the sub-pixel.

[0101] For example, the target driving value of a sub-pixel is determined jointly based on the first compensation value, the second compensation value, and the original driving value, which can improve the compensation accuracy of the sub-pixel and improve the display effect of the display panel.

[0102] Optionally, the driving compensation value corresponding to the sub-pixel is determined based on the first compensation value and the second compensation value of the sub-pixel in the region to be compensated, including: determining the driving compensation value of the sub-pixel in the region to be compensated based on the product of the first compensation value and the second compensation value.

[0103] For example, the method for determining the first compensation value is relatively simple, and the second compensation value can be directly obtained by querying the second compensation table. The driving compensation value is determined by the product of the first compensation value and the second compensation value, indicating that the method for determining the driving compensation value is simple. It can be seen that the brightness compensation method provided in this embodiment improves the compensation effect while ensuring the compensation accuracy.

[0104] Optional,

[0105]

[0106] in, To drive the compensation value, gray is the first compensation value, and gain is the second compensation value. The first reference voltage, The second reference voltage is k1, the preset register value is k2, and the set constant is k2.

[0107] This can be understood as an amplification factor. For example, k2 can be 128. As can be seen from the above formula, the method for determining the drive compensation value is simple.

[0108] Optionally, at least two display partitions include an adjacent first display partition and a second display partition. The refresh rate of the first display partition is lower than that of the second display partition. The area to be compensated includes a first area to be compensated, the position of which is related to the position of the boundary line between the first and second display partitions. At least a portion of the first area to be compensated is located in the second display partition. The closer a sub-pixel in the first area to be compensated is to the boundary line between the first and second display partitions, the larger the absolute value of the driving compensation value corresponding to that sub-pixel. For example, the first area to be compensated includes the first row of sub-pixels in the second display partition that is adjacent to the first display partition.

[0109] Partition enable signal During the transition from low to high level, the sub-pixel closer to the boundary line corresponds to the partition enable signal at the output time of its scan pulse. The lower the instantaneous voltage, the closer the sub-pixel is to the boundary line, and the higher the corresponding partition enable signal at the output time of the scan pulse. The larger the absolute value of the voltage difference between the instantaneous voltage and the steady-state voltage, that is, the closer the sub-pixel is to the boundary line, the greater the amplitude of the scanning pulse (equal to the partition enable signal). The lower the absolute value of the instantaneous voltage, the greater the difference between the high voltage of the transistor gate in the threshold compensation unit 120 and the subsequent stable state. Therefore, the display condition of sub-pixels closer to the boundary line is worse, for example, darker. Consequently, the absolute value of the drive compensation value corresponding to the sub-pixel closer to the boundary line is larger, that is, the compensation degree is greater. Referring to Figures 2 and 3, the lower the enable level (high level for Figures 2 and 3) of the partition enable signal corresponding to the sub-pixel closer to the boundary line, the darker the brightness of the sub-pixel. In this embodiment, setting the absolute value of the drive compensation value corresponding to the sub-pixel closer to the boundary line is larger can improve the compensation effect of the sub-pixel closer to the boundary line, so that the display brightness of sub-pixels in different rows in the area to be compensated is basically the same after brightness compensation, thereby improving the brightness compensation effect of the display panel.

[0110] Optionally, the display panel includes data lines. In a second display frame (e.g., a full refresh frame), data voltages transmitted via the data lines are written to the sub-pixels of the first display partition. Subsequently, data voltages transmitted via the data lines are written to the sub-pixels of the second display partition. For example, the shift register in the first gate drive circuit driving the first display partition can be the preceding stage of the shift register in the first gate drive circuit driving the second display partition. The refresh rate of the first display partition is lower than the refresh rate of the second display partition. In the first display frame (e.g., a partial refresh frame), the load on the second display partition is greater than that on the first display partition. At the boundary, the partition enable signal... The transition from a disabled level to an enabled level has a significant delay, resulting in more noticeable dark bands. By compensating for the data voltage of the sub-pixels in the first display frame that are located in the second display partition—that is, by using the target driving value as the data voltage—the dark band phenomenon near the boundary between the first and second display partitions can be improved.

[0111] Optionally, the location of the area to be compensated changes with the location of the corresponding boundary line; and / or, the area to be compensated is located on one side of the corresponding boundary line, or, a portion of the area to be compensated is located on one side of the corresponding boundary line, and another portion of the area to be compensated is located on the other side of the corresponding boundary line.

[0112] The position of the area to be compensated changes according to the position of the corresponding boundary line, allowing for flexible setting of the area's position and improving the brightness compensation effect of the display panel. The area to be compensated, after its position changes, can always remain adjacent to the boundary line.

[0113] When the total number of rows of compensated subpixels in the first compensation table is fixed, setting the area to be compensated to be located on one side of the boundary line, that is, only performing brightness compensation on the subpixels of one display partition, allows more rows of subpixels in the area to be compensated on one side of the boundary line to find the corresponding first compensation value in the first compensation table, increasing the number of rows of subpixels in the area to be compensated that require brightness compensation, thereby improving the brightness compensation effect of the display panel.

[0114] By setting a portion of the area to be compensated to be located on one side of the corresponding dividing line and another portion of the area to be compensated to be located on the other side of the corresponding dividing line, brightness compensation can be performed on both display zones with different refresh rates, reducing the brightness difference between the display zones on both sides of the dividing line and improving the brightness compensation effect of the display panel.

[0115] Optionally, the display panel includes a data cable; the brightness compensation method for the display panel further includes: transmitting a target driving value via the data cable in the first display frame.

[0116] For example, the target drive value can be the data voltage Vdata.

[0117] Optionally, the first display frame may be a refresh frame for a portion of the display partitions, or a hold frame for another portion of the display partitions. The first display frame may be a partial refresh frame.

[0118] For example, during a refresh frame, data can be written to a sub-pixel, meaning the gate voltage of the driving transistor will be refreshed. During a hold frame, the data voltage of the previous refresh frame is maintained, and no data is written, meaning the gate voltage of the driving transistor will not be refreshed.

[0119] Optionally, Figure 7A is a schematic diagram of a display panel according to an embodiment of this application. The first area to be compensated, AA0, is located on one side of the boundary line between the first display partition AA1 and the second display partition AA2, for example, the first area to be compensated is located in the second display partition. The display panel includes data lines, and the brightness compensation method of the display panel further includes: in the second display frame, writing the first data voltage transmitted by the data lines into the sub-pixels of the first area to be compensated. The second display frame is the refresh frame of the first area to be compensated; in the first display frame, the target driving value transmitted by the data line is used as the compensated data voltage and written into the sub-pixel of the first area to be compensated, and the first display frame is the refresh frame of the first area to be compensated.

[0120] For example, the first area to be compensated, AA0, is the display area closest to the first display partition in the second display partition. Before brightness compensation, the first area to be compensated is darker than other display areas in the second display partition and / or the first display partition. In the second display frame, since both the first and second display partitions will write data, the partition enable signal does not need to change, and there will be no display unevenness problem. Therefore, brightness compensation for the sub-pixels of the first area to be compensated is not required. Thus, a first data voltage can be written to the sub-pixels in the first area to be compensated. In the first display frame, the partition enable signal changes, and brightness compensation needs to be performed on the sub-pixels of the first area to be compensated. The target driving value is written as a data voltage into the sub-pixels. For example, the distance and / or relative position between the starting row sub-pixels of the first area to be compensated and the boundary line between the first display partition AA1 and the second display partition AA2 remains unchanged.

[0121] Optionally, Figure 7B is a schematic diagram of another display panel structure provided according to an embodiment of this application. The first compensation area AA0 includes a first sub-area AA01 and a second sub-area AA02. The first sub-area AA01 is located in the first display partition AA1, and the second sub-area AA02 is located in the second display partition AA2. In the second display frame, the second data voltage transmitted by the data line is written to the sub-pixel in the first sub-area. Then, the third data voltage transmitted by the data line is written to the sub-pixel in the second sub-area. The second display frame is the refresh frame of the first sub-area. In the first display frame, the data line transmits the target driving value corresponding to the sub-pixel in the first sub-area after compensating the second data voltage. Then, the data line transmits the target driving value corresponding to the sub-pixel in the second sub-area and writes the target driving value transmitted by the data line as the data voltage to the sub-pixel in the second sub-area. The first display frame is the hold frame of the first sub-area and the refresh frame of the second sub-area.

[0122] For example, the first sub-region and the second sub-region are adjacent, with the dividing line located between the first sub-region and the second sub-region. Within the second display frame, both the first and second display partitions are refreshed, so there is no problem with uneven display, and brightness compensation is not required for the sub-pixels of the first and second sub-regions.

[0123] The first display frame is a hold frame for the first sub-region. During the hold frame, the pixel circuit in the first sub-region does not write data voltage. A coupling capacitor exists between the data line and the gate of the driving transistor in the pixel circuit. In the first display frame, the data line transmits the target driving value corresponding to the sub-pixel in the first sub-region after compensation for the second data voltage. This compensation, through the coupling effect of the coupling capacitor, compensates for the voltage at the gate of the driving transistor in the pixel circuit of the first sub-region, thereby achieving brightness compensation for the sub-pixel in the first sub-region. The second data voltage can be the data voltage corresponding to the sub-pixel in the first sub-region within the second display frame, which is located before the first display frame and is closest to it.

[0124] In the first display frame, the second display partition is refreshed, that is, the pixel circuit in the second display partition will write data voltage. Therefore, for the second sub-region in the second display partition, the target driving value is output to the sub-pixel of the second sub-region by compensating the original data voltage according to the original data voltage corresponding to the sub-pixel, and brightness compensation is performed on the sub-pixel of the second sub-region to improve the uneven display phenomenon.

[0125] Optionally, in the second display frame, the data voltage transmitted by the data line is written to the sub-pixels of the first display partition, and then the data voltage transmitted by the data line is written to the sub-pixels of the second display partition.

[0126] In the second display frame, the subpixels of the first display partition are written with data voltages before the subpixels of the second display partition, indicating that the subpixels of the first display partition are scanned before the subpixels of the second display partition.

[0127] In the second display frame, the first area to be compensated can be compensated for brightness without using the first compensation value, the second compensation value, the driving compensation value, etc. Therefore, in the second display frame, under the same grayscale, the data voltage corresponding to the sub-pixel of the first display partition can be the same as the data voltage corresponding to the sub-pixel of the second display partition.

[0128] Optionally, at least two display partitions include a third display partition adjacent to the second display partition, the second display partition being located between the first display partition and the third display partition, the refresh rate of the third display partition being less than the refresh rate of the second display partition, in the second display frame, data voltage is written to the sub-pixels of the second display partition, and then data voltage is written to the sub-pixels of the third display partition.

[0129] For example, the shift register in the first gate drive circuit driving the second display partition can be the preceding stage of the shift register in the first gate drive circuit driving the third display partition. Similarly, the shift register in the first gate drive circuit connected to the second display partition can be the preceding stage of the shift register in the first gate drive circuit connected to the third display partition.

[0130] The area to be compensated includes a second area AA03, the location of which is related to the position of the boundary line between the third and second display partitions; alternatively, the area to be compensated may not be related to the position of the boundary line between the third and second display partitions, meaning a second area AA03 may or may not be set. The second area AA03 may be located on one side of the boundary line between the third and second display partitions, for example, on the second display partition itself. Alternatively, a portion of the second area AA03 may be located on one side of the boundary line between the third and second display partitions, and another portion may be located on the other side of the boundary line between the third and second display partitions.

[0131] For example, in the second display frame, the subpixels of the second display partition are written with data voltage before the subpixels of the third display partition, indicating that the subpixels of the second display partition are scanned before the subpixels of the third display partition.

[0132] The second area to be compensated can be located within the second display partition and adjacent to the boundary line between the second and third display partitions. Alternatively, the second area to be compensated can be located within the third display partition and adjacent to the boundary line between the second and third display partitions. Furthermore, the second area to be compensated can also cover the boundary line between the second and third display partitions, meaning that part of the second area to be compensated is located within the second display partition, and another part is located within the third display partition.

[0133] The location of the area to be compensated is unrelated to the boundary line between the third and second display partitions, indicating that in the second display frame (e.g., a partial refresh frame), when the scanning process moves from a display partition with a high refresh rate to a display partition with a low refresh rate, brightness compensation is not required.

[0134] Optionally, in the first display frame, brightness compensation is applied to the first area to be compensated.

[0135] For example, in the first display frame, if brightness compensation is not performed on the first area to be compensated, the brightness of the first area to be compensated is darker than that of other display areas. Therefore, brightness compensation is performed on the first area to be compensated to improve the display uniformity of different display zones, thereby improving the display effect of the display panel.

[0136] Optionally, the first display partition and the second display partition are arranged along a first direction Y, and the data lines extend along the first direction Y. The first direction Y may be parallel to the column direction of the sub-pixels (or pixel circuits) arrangement.

[0137] For example, any row of subpixels in the first display partition is displayed before any row of subpixels in the second display partition.

[0138] Figure 7C is a schematic diagram of another display panel according to an embodiment of this application. Referring to Figure 7C, optionally, the display panel includes a first gate driving circuit, a multi-row pixel circuit 1113, and multiple partition enable signal lines. The first gate driving circuit includes multiple cascaded shift register groups 10. Each shift register group 10 includes k cascaded shift register units 11, where k is an integer greater than or equal to 2. Each shift register unit 11 includes m shift registers 111, where m is an integer greater than or equal to 1. Different shift register units 11 in the same shift register group 10 are electrically connected to different partition enable signal lines. Different shift register groups 10 are connected to the same k partition enable signal lines. The output terminal of the first-level shift register 111 is electrically connected to n-row pixel circuits 1113 through scan lines 1112, where n is an integer greater than or equal to 1. The number of rows of the pixel circuits 1113 in the area to be compensated is greater than or equal to... OK.

[0139] For example, the number of rows of pixel circuit 1113 in the first compensation area AA0 is greater than or equal to For example, the row number of pixel circuit 1113 in the second sub-region AA02 of the first region to be compensated AA0 is greater than or equal to 1113. For example, the row number of pixel circuit 1113 in the second compensation area AA03 is greater than or equal to... OK.

[0140] In some other embodiments, all shift registers 111 in the first gate drive circuit may be connected to the same partition enable signal line.

[0141] In this configuration, scan lines 1112 extend along a second direction X. The second direction X intersects, for example, with, the first direction Y of the data lines Data, for example, perpendicular to it. The second direction X may be parallel to the row direction of the sub-pixel (or pixel circuit) array. Multiple data lines Data may be arranged along the second direction. Multiple scan lines 1112 may be arranged along the first direction. Figure 7C schematically illustrates the case where k=4. For example, m can be 16 and n can be 1. Each shift register group 10 can control... The display configuration of the row pixel circuit 1113. The shift register group 10 of the first gate drive circuit in the display panel shown in Figure 7C can be considered as including four cascaded shift register units 11 and four partition enable signal lines, namely VFE1, VFE2, VFE3, and VFE4. One partition enable signal line is connected to m shift registers in one shift register unit 11. Each partition enable signal line can drive one shift register unit 11. In the row pixel circuit, the number of rows driven by the four partition enable signal lines is one cycle. Referring, exemplarily, to Figure 7C, which schematically illustrates the case of k=4, m=4, n=1, the display panel includes a first display partition AA1, a second display partition AA2, and a third display partition AA3. The refresh rates of the first and third display partitions AA1 and AA3 are low, while the refresh rate of the second display partition AA2 is high. The left side of Figure 7C shows the timing of the partition enable signals in the first display frame (the refresh frame of the second display partition AA2, and the hold frame of the first and third display partitions AA3). During the scanning phase of the first and third display partitions AA1 and AA3, the partition enable signals on the partition enable signal lines are at a disabled level, such as a low level. During the scanning phase of the second display partition AA2, the partition enable signals on the partition enable signal lines are at an enabled level, such as a high level. When the partition enable signal on partition enable signal line VFE1 changes from an disabled level (e.g., low level) to an enable level (e.g., high level), the starting row pixel circuit in the second display partition AA2 begins data refresh; when the partition enable signal on partition enable signal line VFE4 changes from an enable level (e.g., high level) to an disabled level (e.g., low level), the ending row pixel circuit in the second display partition AA2 completes data refresh.

[0142] Optionally, Figure 8 is a schematic diagram of the transition of the partition enable signal in the first display frame and the second display frame according to an embodiment of this application. Referring to Figure 8, in the first display frame F1, the pulse transitions of the signals on the k partition enable signal lines to the enable level (e.g., high level) are sequentially delayed; in the second display frame F2, the signals on the k partition enable signal lines are at the enable level. For example, in the first display frame F1, the time periods when the signals on the k partition enable signal lines are at the enable level overlap. For example, in the first display frame F1, the durations of the time periods when the signals on the k partition enable signal lines are at the enable level are equal. For example, in the first display frame, the pulse transitions of the signals on the k partition enable signal lines to the enable level (e.g., high level) are sequentially delayed, and the number of rows delayed is... The scan time of the row pixel circuit. For example, the pulse transition interval of the signals on the enable signal lines of adjacent partitions. The scanning time of the row pixel circuit.

[0143] For example, the first display frame F1 is a refresh frame for at least one display partition and a hold frame for at least one display partition. In this case, the pulse transition times of the signals on the k partition enable signal lines to the enable level are sequentially delayed to facilitate multi-frequency control of the partitions. The second display frame F2 is a refresh frame for multiple or each display partition. Setting the signals on the k partition enable signal lines to the enable level in the second display frame F2 ensures that each display partition can be refreshed in the second display frame F2, and eliminates the need for signal transitions on the partition enable signal lines. Taking the display panel structure shown in Figure 7C as an example, and referring to Figures 7C and 8, in the second display frame F2, the signals on the k partition enable signal lines are at the enable level, and the first display partition AA1, the second display partition AA2, and the third display partition AA3 are refreshed in scanning order. In the first display frame F1, the shift register connected to the pixel circuit in the first display partition AA1 receives a low-level partition enable signal during the time period corresponding to the first display partition AA1, and the shift register connected to the pixel circuit in the third display partition AA3 receives a low-level partition enable signal during the time period corresponding to the third display partition AA3. The pixel circuits in the first display partition AA1 and the third display partition AA3 operate in a hold frame. In the second display frame F2, the shift register connected to the pixel circuit in the second display partition AA2 receives a low-level partition enable signal during the time period corresponding to the second display partition AA2, and the first display partition AA2 operates in a refresh frame.

[0144] One or more first display frames can be set between adjacent second display frames. The more first display frames are set between adjacent second display frames, the lower the refresh rate of the first display partition AA1 and the third display partition AA3.

[0145] Optionally, k-1 shift register units 11 are connected between two adjacent shift register units 11 connected to the same partition enable signal line.

[0146] For example, the sub-pixel rows connected by the k partition enable signal lines are arranged periodically. For example, the first partition enable signal line VFE1 connects to sub-pixel rows 1-16, 65-80, etc.; the second partition enable signal line VFE2 connects to sub-pixel rows 17-32, 81-96, etc.; the third partition enable signal line VFE3 connects to sub-pixel rows 33-48, 97-112, etc.; the fourth partition enable signal line VFE4 connects to sub-pixel rows 49-64, 98-128, etc.

[0147] Optionally, in the first display frame, the timing of the pulse transition of the signals on the k partition enable signal lines to the enable level is related to the position of the partition lines.

[0148] The moment when the pulse of the signal on the k partition enable signal line jumps to the enable level determines the location where the refresh rate changes in the display panel, that is, the boundary position of the display partition with different refresh rates.

[0149] Optionally, at least in the first region to be compensated The row pixel circuit is located in the second display partition.

[0150] When the signals on all k partition enable signal lines change to enable level, then The row pixel circuit is lit when... During the period when the row pixel circuit is lit, if the enable level of the signal on the k partition enable signal lines does not reach the required level (for example, as shown in Figure 2, when the enable level is high, the signal on the partition enable signal line may fail to reach the required amplitude during the transition from low to high level), this situation will lead to... The brightness of the row pixel circuit differs from the brightness of other display areas; therefore, at least one pixel in the first area to be compensated is set. The row pixel circuit is located in the second display zone, which can improve the brightness compensation effect of the display panel.

[0151] Optionally, n is greater than or equal to 2, m is greater than or equal to 8, k is greater than or equal to 4, and at least 64 rows of pixel circuits in the first area to be compensated are located in the second display partition.

[0152] For example, the output of a first-level shift register (e.g., a per-level shift register, or, at least a portion of the shift registers, per-level shift registers) is connected to at least two rows of pixel circuitry. The first-level shift register can drive at least two rows of pixel circuitry. Subpixels may include pixel circuitry and light-emitting units. Pixel circuitry may be connected to light-emitting units.

[0153] Optionally, continuing to refer to Figures 2 and 9, the pixel circuit includes a driving unit 110 and a threshold compensation unit 120. The threshold compensation unit 120 is connected between the control terminal and the first terminal of the driving unit 110. The control terminal SN2 of the threshold compensation unit 120 is electrically connected to the output terminal GOUT of the shift register in the first gate driving circuit. For example, the threshold compensation unit 120 is configured to compensate the gate voltage of the driving unit 110. The driving unit 110 includes a driving transistor T3, and the threshold compensation unit 120 includes a fourth transistor T4. The gate of the fourth transistor T4, as the control terminal SN2 of the threshold compensation unit 120, is electrically connected to the output terminal GOUT of the shift register. The pixel circuit may also include a data writing unit 140, which is connected between the data line Data and the second terminal of the driving unit 110. For example, the data writing unit includes a fifth transistor T5.

[0154] The pixel circuit may also include some or all of the initialization unit, light-emitting control unit, and reset unit. The initialization unit includes a sixth transistor T6, the light-emitting control unit includes a seventh transistor T7 and / or an eighth transistor T8, and the reset unit includes a ninth transistor T9 and / or a tenth transistor T10. The first terminal of the fifth transistor T5 is connected to the data line Data, the second terminal of the fifth transistor T5 is connected to the second terminal of the driving transistor T3 (which can be used as the second terminal of the driving unit), and the control terminal of the fifth transistor T5 is connected to the first scan line SP1. The seventh transistor T7, the driving transistor T3, the eighth transistor T8, and the light-emitting unit 130 are connected in series between the second power line ELVDD and the third power line ELVSS. The control terminals of the seventh transistor T7 and the eighth transistor T8 are connected to the light-emitting control line EM. The two ends of the storage capacitor Cst are connected to the control terminal of the driving module 110 and the power line ELVDD, respectively. The sixth transistor T6 and the fourth transistor T4 are connected in series between the first signal line Vrefn1 and the control terminal of the driving module 110. The control terminal of the fourth transistor T4, as the control terminal of the threshold compensation unit 120, is electrically connected to the output terminal of the shift register in the first gate driving circuit. The control terminal of the sixth transistor T6 is connected to the third scan line SN1. The second terminal of the ninth transistor T9 is connected to the second signal line Vrefp, and the control terminal of the ninth transistor T9 is connected to the second scan line SP2. The second terminal of the tenth transistor T10 is connected to the third signal line Vrefn2, and the control terminal of the tenth transistor T10 is connected to the second scan line SP2. The first terminal of the ninth transistor T9 can be connected to either the first or second terminal of the driving transistor. The first terminal of the tenth transistor T10 is connected to the first terminal of the light-emitting unit.

[0155] Optionally, in the first initialization phase, the initialization unit and the threshold compensation unit 120 are turned on to initialize the driving transistor. In the data writing phase, the data writing unit and the threshold compensation unit 120 are turned on to write the voltage obtained after compensating the threshold voltage of the driving transistor T3 to the target driving value to the gate of the driving transistor T3. In the second initialization phase (e.g., overlapping or staggered with the first initialization phase or the data writing phase), the reset unit is turned on to reset the first terminal of the light-emitting unit 130 and / or the first or second terminal of the driving transistor. In the light-emitting phase, the seventh transistor T7 and the eighth transistor T8 are turned on, and the light-emitting unit 130 emits light.

[0156] A refresh frame may include a first initialization phase, a data writing phase, a second initialization phase, and a light-emitting phase. A hold frame may include a second initialization phase and a light-emitting phase. A hold frame may not include the first initialization phase and the data writing phase. Optionally, a sixth transistor T6 may be connected between the first signal line Vrefn1 and the control terminal of the driver module 110. A fourth transistor T4 may be connected between the second terminal of the driver module 110 and the control terminal of the driver module 110.

[0157] Optionally, the threshold compensation unit includes an N-type transistor.

[0158] When the N-type transistor is high, it conducts. When the enable level is high, the output of the shift register outputs a high level, which enables the threshold compensation unit to conduct.

[0159] The transistors T3 to T10 mentioned above can be P-type transistors or N-type transistors.

[0160] Optionally, Figure 9 is a schematic diagram of a shift register according to an embodiment of this application. Referring to Figure 9, the shift register includes a shift unit 210 and an output unit 220. The output unit 220 is electrically connected to the shift unit 210. The output unit 220 includes a first transistor T1 and a second transistor T2. The control terminals of the first transistor T1 and the second transistor T2 are both connected to the shift unit 210. The first terminal of the first transistor T1 is electrically connected to the partition enable signal line VFE (e.g., one of VFE1 to VFE4). The second terminal of the first transistor T1 is electrically connected to the first terminal of the second transistor T2 and the output terminal GOUT of the shift register. The second terminal of the second transistor T2 is electrically connected to the first power supply signal line NVGL.

[0161] The first power signal line NVGL can transmit a low level. If the voltage on the partition enable signal line VFE is a disabled level, such as a low level, then the voltage acting on the N-type transistor in the threshold compensation unit 120 is always low, the N-type transistor is always off, and the storage capacitor in the pixel circuit... The voltage remains constant. If the voltage on the partition enable signal line VFE (e.g., one of VFE1 to VFE4) is at an enable level, such as a high level, the first gate drive circuit can output a turn-on pulse to the N-type transistor in the threshold compensation unit 120. The N-type transistor turns on, which can activate the storage capacitor in the pixel circuit. Charge it.

[0162] The shift unit 210 includes an output subunit and a control subunit. The output subunit may include an eleventh transistor T11 and a twelfth transistor T12. The control subunit may include some or all of the following: the thirteenth transistor T13 to the twenty-third transistor T23, the first capacitor C1, the second capacitor C2, and the third capacitor C3. Specifically, the first terminal of the eighteenth transistor T18, the control terminal of the seventeenth transistor T17, the control terminal of the sixteenth transistor T16, and the control terminal of the thirteenth transistor T13 are all connected to the first power signal line NVGL. The control terminal of the eighteenth transistor T18 and the control terminal of the twentieth transistor T20 are both connected to the first clock signal line SCK1. The first terminal of the fifteenth transistor T15, the control terminal of the fourteenth transistor T14, the control terminal of the twenty-second transistor T22, and the first terminal of the second capacitor C2 are all connected to the second clock signal line SCK2. The first terminals of the twenty-first transistor T21 and the twenty-third transistor T23 are both connected to the fourth power line NVGH. The first terminal of the twentieth transistor T20 is connected to the start signal line SIN. The first terminal of the eleventh transistor T11 is connected to the fourth power line NVGH. The second terminal of the eleventh transistor T11 outputs a shift signal SOUT. The first terminal of the twelfth transistor T12 is connected to the first power signal line NVGL.

[0163] For example, the first clock signal terminal SCK1 of the odd-numbered shift register and the second clock signal terminal SCK2 of the even-numbered shift register are connected to the first clock signal line, and the second clock signal terminal SCK2 of the odd-numbered shift register and the first clock signal terminal SCK1 of the even-numbered shift register are connected to the second clock signal line.

[0164] Figure 10 is a schematic diagram illustrating the relationship between a scanning signal, a shift signal output by a shift unit, and a signal on a partition enable signal line in the first display frame, according to an embodiment of this application. Figure 11 is a schematic diagram illustrating the relationship between a scanning signal, a shift signal output by a shift unit, and a signal on a partition enable signal line in the second display frame, according to an embodiment of this application. Referring to Figures 7C, 9-11, Figures 10 and 11 schematically illustrate the case where k=4 and m=4. The display panel may include 3n shift registers, and the first display partition AA1, the second display partition AA2, and the third display partition AA3 are each connected to n shift registers respectively, wherein SOUT1- SOUTn represents the shift signal output from the shift units in the first n-stage shift registers corresponding to the first display partition AA1; SOUTn+1 to SOUT2n represent the shift signals output from the shift units in the (n+1)th to 2nth stage shift registers corresponding to the second display partition AA2; SOUT2n+1 to SOUT3n represent the shift signals output from the shift units in the (2n+1)th to 3nth stage shift registers corresponding to the third display partition AA3. GOUT1 to GOUTn represent the scan signals output from the first n-stage shift registers corresponding to the first display partition AA1; GOUTn+1 to GOUT2n represent the scan signals output from the (n+1)th to 2nth stage shift registers corresponding to the second display partition AA2; GOUT2n+1 to GOUT3n represent the scan signals output from the (2n+1)th to 3nth stage shift registers corresponding to the third display partition AA3.

[0165] Referring to Figure 10, in the first display frame, the refresh frequency of the first display partition AA1 and the third display partition AA3 is a low refresh frequency. The corresponding partition enable signals in the partition enable signal lines (e.g., VFE1 to VFE4) are all at a disabled level, such as a low level VL. The output terminal GOUT of the shift register outputs a disabled level, such as a low level VL. The first display partition AA1 and the third display partition AA3 will not receive the enable level pulses output by the corresponding shift register output terminal GOUT. The second display partition AA2 has a high refresh rate. The partition enable signal on the partition enable signal lines (e.g., VFE1 to VFE4) is at enable level VH. The pulse transitions to enable levels on the four partition enable signal lines are sequentially delayed. For example, during the delay between partition enable signal line VFE2 and partition enable signal line VFE1, GOUTn+1 to GOUTn+4 are sequentially enable level pulses (i.e., the conduction pulses of the threshold compensation unit); during the delay between partition enable signal line VFE3 and partition enable signal line VFE2, GOUTn+5 to GOUTn+8 are sequentially enable level pulses; and during the delay between partition enable signal line VFE4 and partition enable signal line VFE3, GOUTn+9 to GOUTn+12 are sequentially enable level pulses. The second display partition AA2 can receive enable level pulses output from the corresponding shift register output terminal GOUT.

[0166] Referring to Figure 11, in the second display frame, the first display partition AA1, the second display partition AA2, and the third display partition AA3 can all receive the enable level pulses output by the corresponding shift register output terminal GOUT. That is, GOUT1 to GOUT3n are enable level pulses in sequence. Therefore, the partition enable signals on the four partition enable signal lines (e.g., VFE1 to VFE4) are at the enable level VH. The scan signal output by the shift register, that is, the signal output by the output terminal of output unit 220, is the same as the shift signal output by the output terminal of shift unit 210.

[0167] Figure 12 is a schematic diagram of a display device according to an embodiment of this application. Referring to Figure 12, the display device provided in this embodiment includes a display panel 100 and a driving module 200. The driving module 200 is configured to determine the target driving value of the area to be compensated based on the display data of the area to be compensated when the display panel 100 is a multi-frequency display with different refresh rates. The display panel 100 includes at least two display zones with different refresh rates. The position of the area to be compensated is related to the position of the boundary line of the corresponding display zones with different refresh rates.

[0168] This application provides a display device including a display panel and a driving module. The driving module is configured to determine a target driving value for the area to be compensated based on display data of the area to be compensated when the display panel is configured for multi-frequency zone display. In the case of multi-frequency zone display, the display panel includes at least two display zones with different refresh rates. The position of the area to be compensated is related to the position of the boundary line between the corresponding display zones with different refresh rates. The area to be compensated can be adjacent to or overlap with the boundary line, thereby enabling brightness compensation for the display area requiring brightness compensation and improving the brightness compensation effect of the display panel. Since the display data reflects the display status of the sub-pixels in the area to be compensated, the target driving value determined based on the display data is related to the display status of the sub-pixels, thus more accurately improving the display effect in the area to be compensated. Driving the sub-pixels of the area to be compensated with the target driving value can make the display brightness of the sub-pixels close to the target display brightness, thereby improving the problem of uneven display brightness in multi-frequency zone display.

[0169] Optionally, the driver module 200 can be a chip.

[0170] Optionally, the displayed data includes displaying grayscale.

[0171] Optionally, the driving module includes a first determining unit and a second determining unit; the first determining unit is configured to determine a first compensation value based on the display grayscale of the sub-pixels of the area to be compensated; the second determining unit is configured to determine a target driving value for the area to be compensated based on the first compensation value.

[0172] Optionally, the display grayscale includes a first display grayscale and a second display grayscale, and the area to be compensated includes multiple sub-pixels, wherein each sub-pixel in at least a portion of the sub-pixels in the area to be compensated has a different first compensation value corresponding to the first display grayscale and the second display grayscale.

[0173] Optionally, the area to be compensated includes multiple rows of sub-pixels; the first determining unit is configured to determine a first compensation value based on the row number of the sub-pixels in the area to be compensated, the display grayscale, and a first compensation table, wherein the first compensation table includes the first compensation values ​​corresponding to multiple rows at various display grayscales.

[0174] Optionally, the first compensation value corresponding to each sub-pixel of the i-th row of the area to be compensated in various display gray levels is the first compensation value of the i-th row in the first compensation table; i is an integer greater than or equal to 1.

[0175] Optionally, the first compensation value corresponding to the Xth row sub-pixel in the area to be compensated at the first display grayscale is different from the first compensation value corresponding to the Yth row sub-pixel in the area to be compensated at the first display grayscale.

[0176] And / or, the first compensation value corresponding to the Xth row sub-pixel in the area to be compensated in the second display grayscale is different from the first compensation value corresponding to the Yth row sub-pixel in the area to be compensated in the second display grayscale, where X and Y are different positive integers.

[0177] Optionally, the display data includes grayscale and brightness level.

[0178] Optionally, the area to be compensated includes multiple rows of sub-pixels;

[0179] The driving module includes a first determining unit, a second determining unit, and a third determining unit. The first determining unit is configured to determine a first compensation value based on the row number of the sub-pixels of the area to be compensated, the display grayscale, and a first compensation table, wherein the first compensation table includes first compensation values ​​corresponding to multiple rows at various display grayscales. The third determining unit is configured to determine a second compensation value based on the display grayscale and display brightness level of the sub-pixels of the area to be compensated. The second determining unit is configured to determine a target driving value for the area to be compensated based on the first compensation value and the second compensation value.

[0180] Optionally, the first compensation value corresponding to the Xth row sub-pixel in the area to be compensated at the first display grayscale is different from the first compensation value corresponding to the Yth row sub-pixel in the area to be compensated at the first display grayscale, and / or, the first compensation value corresponding to the Xth row sub-pixel in the area to be compensated at the second display grayscale is different from the first compensation value corresponding to the Yth row sub-pixel in the area to be compensated at the second display grayscale, where X and Y are different positive integers.

[0181] Optionally, the display brightness level includes a first display brightness level and a second display brightness level, and for each sub-pixel in at least a portion of the sub-pixels in the area to be compensated, the second compensation value corresponding to the first display grayscale at the first display brightness level is different from the second compensation value corresponding to the first display grayscale at the second display brightness level; and / or, the second compensation value corresponding to the first display grayscale at the first display brightness level is different from the second compensation value corresponding to the second display grayscale at the first display brightness level.

[0182] The display device provided in this embodiment has the same effect as the brightness compensation method for the display panel provided in any embodiment of this application. Technical details not covered in this embodiment can be found in the brightness compensation method for the display panel provided in any embodiment of this application. This embodiment can be combined with some or all of the features in the above embodiments, which will not be repeated here.

[0183] Figure 13 is a flowchart illustrating a debugging method for a display panel according to an embodiment of this application. Referring to Figure 13, the debugging method provided in this embodiment includes the following steps:

[0184] S410. Determine a first compensation value based on the row number of the sub-pixels in the area to be compensated, the display grayscale, and the first compensation table, wherein the first compensation table includes the first compensation values ​​corresponding to multiple rows at various display grayscales.

[0185] S420. Determine the second compensation value based on the display grayscale and display brightness level of the sub-pixels of the area to be compensated.

[0186] S430. Determine the target driving value of the area to be compensated based on the first compensation value and the second compensation value.

[0187] The display panel includes at least two display zones with different refresh rates; the location of the area to be compensated is related to the location of the boundary line between the display zones with different refresh rates.

[0188] For details regarding steps S410 to S430, please refer to the description of the brightness compensation method for display panels; it will not be repeated here. The target driving values ​​determined in steps S410 to S430 are applicable to various display panels.

[0189] S440. When the display uniformity of the display panel does not meet the requirements, under one or more display brightness levels and / or one or more display gray levels, for the same display brightness level and display gray level, adjust the position of the dividing line to obtain the brightness of the area to be compensated when the dividing line is located at different positions.

[0190] For example, after determining the target driving value, the display panel is driven to display using the target driving value, and the display uniformity of the display panel is checked to see if it meets the requirements. If it does not meet the requirements, step S440 is executed. The display panel can be controlled to display a 30nit32 grayscale image and a 2nit32 grayscale image, and then the position of the dividing line is adjusted, and the brightness of the area to be compensated after adjusting the dividing line is obtained.

[0191] S450. Based on the brightness difference or the average of the brightness difference between the brightness of the area to be compensated and the reference brightness when the dividing line is located at different positions, the first compensation value and / or the second compensation value are corrected until the display uniformity of the display panel meets the requirements.

[0192] For example, each time the position of the dividing line changes, the brightness of the area to be compensated and the reference brightness are obtained. Then, the brightness difference between the brightness of the area to be compensated and the reference brightness is determined. The first compensation value and / or the second compensation value can be corrected based on the brightness difference of the number of times the dividing line changes, or the first compensation value and / or the second compensation value can be corrected based on the average of the brightness difference of the number of times the dividing line changes.

[0193] This application provides a method for debugging a display panel. The method includes: determining a first compensation value based on the row number of a sub-pixel in the area to be compensated, the display grayscale, and a first compensation table; determining a second compensation value based on the display grayscale and display brightness level of the sub-pixel in the area to be compensated; and then determining a target driving value for the area to be compensated based on the first and second compensation values. After driving the sub-pixel display with the target driving value, if the display uniformity of the display panel does not meet the requirements, the display panel is controlled to display at one or more display brightness levels and / or one or more display grayscales, and the position of the dividing line is adjusted multiple times to obtain the brightness of the area to be compensated when the dividing line is at different positions. Then, the first compensation value and / or the second compensation value are corrected based on the difference between the brightness of the area to be compensated at different positions and the reference brightness, so that the display uniformity of the display panel determined according to the corrected first compensation value and / or the second compensation value meets the requirements. The debugging method provided in this embodiment can debug different display panels, achieving a panel-by-pane adjustment effect, ensuring that the display effect of each display panel meets the requirements of display uniformity.

[0194] Optionally, the reference brightness is the center brightness of the display panel;

[0195] And / or, obtaining the brightness of the area to be compensated when the boundary line is located at different positions includes:

[0196] The brightness of the area to be compensated is obtained when the dividing line is located in the first display sub-area AA11, the second display sub-area AA21, and the third display sub-area AA31 of the display panel; wherein the first display sub-area AA11, the second display sub-area AA21, and the third display sub-area AA31 are arranged sequentially along the first direction Y, the first display sub-area AA11 and the third display sub-area AA31 are located on opposite sides of the center of the display panel along the first direction Y, the distance between the first display sub-area AA11 and the center of the display panel along the first direction Y is greater than the distance between the second display sub-area AA21 and the center of the display panel along the first direction Y, the distance between the third display sub-area AA31 and the center of the display panel along the first direction Y is greater than the distance between the second display sub-area AA21 and the center of the display panel along the first direction Y, and the display panel includes a data line extending along the first direction Y.

[0197] For example, the center of the display panel can be located in the second display sub-area AA21, and the center of the second display sub-area AA21 can coincide with the center of the display panel. Figure 14 is a brightness diagram of the display panel when the dividing line is located in the second display sub-area according to an embodiment of this application. Figure 15 is a brightness diagram of the display panel when the dividing line is located in the first display sub-area according to an embodiment of this application. Figure 16 is a brightness diagram of the display panel when the dividing line is located in the third display sub-area according to an embodiment of this application. Referring to Figures 14-16, the center brightness of the display panel can be the average brightness of the central area 500 of the display panel. When the dividing line is located in the first display sub-area, the area to be compensated 400 is located in the first display sub-area. When the dividing line is located in the second display sub-area, the area to be compensated 400 is located in the second display sub-area. When the dividing line is located in the third display sub-area, the area to be compensated 400 is located in the third display sub-area. Under the same display brightness level and the same display grayscale, the display brightness of the area to be compensated will be different when the position of the dividing line is different. In this embodiment, the first compensation value and / or the second compensation value are corrected according to the brightness of the area to be compensated 400 at different positions. This can make the display panel display brightness more uniform under the effect of the corrected first compensation value and / or the second compensation value. In addition, there is no need to add a compensation table, which reduces the storage space occupied by the chip.

[0198] Optionally, the distances between the first display sub-area, the second display sub-area, and the third display sub-area and the chip bonding area of ​​the display panel decrease sequentially, the brightness of the first display sub-area, the second display sub-area, and the third display sub-area decreases sequentially, and the brightness difference between the first display sub-area, the second display sub-area, and the third display sub-area and the center brightness of the display panel increases sequentially.

[0199] Optionally, the first compensation value and / or the second compensation value are corrected based on the brightness difference or the average of the brightness difference between the brightness of the area to be compensated and the reference brightness when the dividing line is located at different positions, until the display uniformity of the display panel meets the requirements, including: determining the correction parameter based on the brightness difference or the average of the brightness difference; and using the product of the second compensation value and the correction parameter as the corrected second compensation value.

[0200] For example, different brightness differences or the mean of brightness differences correspond to different correction parameters.

[0201] Figure 17 is a schematic diagram of a display panel debugging device according to an embodiment of this application. Referring to Figure 17, the debugging device provided in this embodiment includes: a first determining unit 510, a second determining unit 520, a third determining unit 530, a brightness acquisition unit 540, and a correction unit 550. The first determining unit 510 is configured to determine a first compensation value based on the row number of the sub-pixels in the area to be compensated, the display grayscale, and a first compensation table, wherein the first compensation table includes multiple rows of first compensation values ​​corresponding to various display grayscales. The second determining unit 520 is configured to determine a second compensation value based on the display grayscale and brightness level of the sub-pixels in the area to be compensated. The third determining unit 530 is configured to determine the area to be compensated based on the first compensation value and the second compensation value. The target driving value; wherein, the display panel includes at least two display zones with different refresh rates; the position of the area to be compensated is related to the position of the boundary line of the corresponding display zones with different refresh rates; the brightness acquisition unit 540 is configured to adjust the position of the boundary line for the same display brightness level and display grayscale under one or more display brightness levels and / or one or more display grayscale levels when the display uniformity of the display panel does not meet the requirements, so as to obtain the brightness of the area to be compensated when the boundary line is located at different positions; the correction unit 550 is configured to correct the first compensation value and / or the second compensation value according to the brightness difference or the average of the brightness difference between the brightness of the area to be compensated and the reference brightness when the boundary line is located at different positions, until the display uniformity of the display panel meets the requirements.

[0202] The display panel debugging device provided in this embodiment has the same effect as the display panel debugging method provided in any embodiment of this application. For technical details not covered in this embodiment, please refer to the display panel debugging method provided in any embodiment of this application.

[0203] It should be understood that the various processes shown above can be used to rearrange, add, or delete steps. For example, the multiple steps described in this application can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this application can be achieved, and this is not limited herein.

[0204] 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 brightness compensation method for a display panel, comprising: When the display panel is a zoned multi-frequency display, the target driving value of the area to be compensated is determined based on the display data of the area to be compensated. In the case where the display panel is a multi-frequency display with partitions, the display panel includes at least two display partitions with different refresh rates; the position of the area to be compensated is related to the position of the boundary line of the display partitions with different refresh rates.

2. The brightness compensation method for a display panel according to claim 1, wherein, The display data includes grayscale levels; Based on the displayed data of the area to be compensated, the target driving value of the area to be compensated is determined, including: A first compensation value is determined based on the display grayscale of the sub-pixels in the area to be compensated; Based on the first compensation value, determine the target driving value of the region to be compensated; The display grayscale includes a first display grayscale and a second display grayscale. The area to be compensated includes a plurality of sub-pixels. Each sub-pixel in at least a portion of the sub-pixels in the area to be compensated has a different first compensation value corresponding to the first display grayscale and the second display grayscale.

3. The brightness compensation method for a display panel according to claim 2, wherein, The area to be compensated includes multiple rows of sub-pixels; Based on the display grayscale of the sub-pixels in the area to be compensated, determine the first compensation value, including: The first compensation value is determined based on the row number of the sub-pixels in the area to be compensated, the display grayscale, and the first compensation table, wherein the first compensation table includes multiple rows of first compensation values ​​corresponding to various display grayscales.

4. The brightness compensation method for a display panel according to claim 3, wherein, The first compensation value for each sub-pixel of the i-th row of the region to be compensated in the first compensation table for the i-th row of the first compensation table is the first compensation value for each sub-pixel of the i-th row of the region to be compensated in the multiple display gray levels; i is an integer greater than or equal to 1. The first compensation value of the Xth row sub-pixel in the area to be compensated at the first display grayscale is different from the first compensation value of the Yth row sub-pixel in the area to be compensated at the first display grayscale. The first compensation value of the Xth row sub-pixel in the area to be compensated at the second display grayscale is different from the first compensation value of the Yth row sub-pixel in the area to be compensated at the second display grayscale. X and Y are different positive integers. The first display grayscale is smaller than the second display grayscale, and each sub-pixel in at least a portion of the sub-pixels in the area to be compensated has an absolute value of a first compensation value corresponding to the first display grayscale that is greater than the absolute value of a first compensation value corresponding to the second display grayscale.

5. The brightness compensation method for a display panel according to claim 3, wherein, Determining the target driving value of the region to be compensated based on the first compensation value includes: Based on the first compensation value of the sub-pixel in the region to be compensated, determine the driving compensation value corresponding to the sub-pixel; The target driving value of the sub-pixel is determined based on the driving compensation value and the original driving value of the sub-pixel; wherein the original driving value is related to the display grayscale of the sub-pixel.

6. The brightness compensation method for a display panel according to claim 5, wherein, At least two of the display partitions include an adjacent first display partition and a second display partition, the refresh rate of the first display partition is less than the refresh rate of the second display partition, and the area to be compensated includes a first area to be compensated, the position of which is related to the position of the boundary line between the first display partition and the second display partition; At least a portion of the first area to be compensated is located in the second display partition, and the first area to be compensated is located in at least a portion of the number of sub-pixels in the second display partition. Under the same display grayscale, the closer the sub-pixel is to the boundary line between the first display partition and the second display partition, the larger the absolute value of the first compensation value corresponding to the sub-pixel. The formula for calculating the drive compensation value is as follows: ； in, Here, gray represents the first compensation value, and gray represents the drive compensation value. The first reference voltage, k1 is the second reference voltage and k1 is the preset register value.

7. The brightness compensation method for a display panel according to claim 1, wherein, The display data includes display grayscale and display brightness levels; The area to be compensated includes multiple rows of sub-pixels; Based on the displayed data of the area to be compensated, the target driving value of the area to be compensated is determined, including: A first compensation value is determined based on the row number of the sub-pixels of the area to be compensated, the display grayscale, and the first compensation table, wherein the first compensation table includes the first compensation values ​​corresponding to multiple rows at various display grayscales. The second compensation value is determined based on the display grayscale and display brightness level of the sub-pixels in the area to be compensated; The target driving value of the region to be compensated is determined based on the first compensation value and the second compensation value.

8. The brightness compensation method for a display panel according to claim 7, wherein, The display grayscale includes a first display grayscale and a second display grayscale, and the display brightness level includes a first display brightness level and a second display brightness level. For each sub-pixel in at least a portion of the sub-pixels in the area to be compensated, the absolute value of the second compensation value corresponding to the first display grayscale at the first display brightness level is different from the absolute value of the second compensation value corresponding to the first display grayscale at the second display brightness level; and / or, the absolute value of the second compensation value corresponding to the first display grayscale at the first display brightness level is different from the absolute value of the second compensation value corresponding to the second display grayscale at the first display brightness level; the absolute value of the second compensation value corresponding to the second display grayscale at the first display brightness level is different from the absolute value of the second compensation value corresponding to the second display grayscale at the second display brightness level; and / or, the absolute value of the second compensation value corresponding to the first display grayscale at the second display brightness level is different from the absolute value of the second compensation value corresponding to the second display grayscale at the second display brightness level.

9. The brightness compensation method for a display panel according to claim 8, wherein, The first display grayscale is smaller than the second display grayscale. For each sub-pixel in at least a portion of the sub-pixels in the area to be compensated, at the same display brightness level, the absolute value of the second compensation value corresponding to the first display grayscale is greater than the absolute value of the second compensation value corresponding to the second display grayscale. The first display brightness level is smaller than the second display brightness level. The brightness of the sub-pixel corresponding to the maximum grayscale at the first display brightness level is smaller than the brightness corresponding to the maximum grayscale at the second display brightness level. For each sub-pixel in at least a portion of the sub-pixels in the area to be compensated, at the same display grayscale, the absolute value of the second compensation value corresponding to the first display brightness level is greater than the absolute value of the second compensation value corresponding to the second display brightness level.

10. The brightness compensation method for a display panel according to claim 7, wherein, Determining the target driving value of the region to be compensated based on the first compensation value and the second compensation value includes: Based on the first compensation value and the second compensation value of the sub-pixel in the region to be compensated, determine the driving compensation value corresponding to the sub-pixel; The target driving value corresponding to the sub-pixel is determined based on the driving compensation value and the original driving value corresponding to the sub-pixel.

11. The brightness compensation method for a display panel according to claim 10, wherein, Based on the first compensation value and the second compensation value of the sub-pixel in the region to be compensated, the driving compensation value corresponding to the sub-pixel is determined, including: The driving compensation value of the sub-pixel in the region to be compensated is determined based on the product of the first compensation value and the second compensation value. The formula for calculating the drive compensation value is as follows: ； ； in, Here, gray is the first compensation value, and gain is the second compensation value. The first reference voltage, The second reference voltage is k1, which is the preset register value, and k2 is the set constant. At least two display partitions include an adjacent first display partition and a second display partition, the refresh rate of the first display partition is less than the refresh rate of the second display partition, the area to be compensated includes a first area to be compensated, the position of the first area to be compensated is related to the position of the boundary line between the first display partition and the second display partition; at least a portion of the first area to be compensated is located in the second display partition, and the closer the sub-pixel in the first area to be compensated located in the second display partition is to the boundary line between the first display partition and the second display partition, the larger the absolute value of the driving compensation value corresponding to the sub-pixel.

12. The brightness compensation method for a display panel according to claim 1, wherein, The location of the area to be compensated changes with the location of the corresponding boundary line; The area to be compensated is located on one side of the corresponding boundary line, or a part of the area to be compensated is located on one side of the corresponding boundary line, and another part of the area to be compensated is located on the other side of the corresponding boundary line. The display panel includes a data cable, and the method further includes: In the first display frame, the target drive value is transmitted via a data line; Wherein, the first display frame is a refresh frame for a portion of the display partitions, and the first display frame is a hold frame for another portion of the display partitions.

13. The brightness compensation method for a display panel according to claim 1, wherein, At least two of the display partitions include an adjacent first display partition and a second display partition, the refresh rate of the first display partition is less than the refresh rate of the second display partition, and the area to be compensated includes a first area to be compensated, the position of which is related to the position of the boundary line between the first display partition and the second display partition; The first area to be compensated is located on one side of the boundary line between the first display partition and the second display partition, and the first area to be compensated is located in the second display partition; The display panel includes a data cable, and the method further includes: In the second display frame, the first data voltage transmitted by the data line is written into the sub-pixel of the first area to be compensated, and the second display frame is the refresh frame of the first area to be compensated; In the first display frame, the target driving value transmitted by the data line is written as the compensated data voltage to the sub-pixel in the first area to be compensated, and the first display frame is the refresh frame of the first area to be compensated.

14. The brightness compensation method for a display panel according to claim 1, wherein, At least two of the display partitions include an adjacent first display partition and a second display partition, the refresh rate of the first display partition is less than the refresh rate of the second display partition, and the area to be compensated includes a first area to be compensated, the position of which is related to the position of the boundary line between the first display partition and the second display partition; The first area to be compensated includes a first sub-area and a second sub-area, the first sub-area being located in the first display partition and the second sub-area being located in the second display partition; The display panel includes a data cable, and the method further includes: In the second display frame, the second data voltage transmitted by the data line is written to the sub-pixel in the first sub-region. Then, the third data voltage transmitted by the data line is written to the sub-pixel in the second sub-region. The second display frame is the refresh frame of the first sub-region and the second display frame is the refresh frame of the second sub-region. In the first display frame, the data line transmits the target driving value corresponding to the sub-pixel in the first sub-region after compensating the second data voltage. Then, the data line transmits the target driving value corresponding to the sub-pixel in the second sub-region and writes the target driving value transmitted by the data line as the data voltage into the sub-pixel in the second sub-region. The first display frame is the hold frame of the first sub-region and the refresh frame of the second sub-region.

15. The brightness compensation method for a display panel according to claim 1, wherein, At least two of the display partitions include an adjacent first display partition and a second display partition, the refresh rate of the first display partition is less than the refresh rate of the second display partition, and the area to be compensated includes a first area to be compensated, the position of which is related to the position of the boundary line between the first display partition and the second display partition; The display panel includes a data cable, and the method further includes: In the second display frame, the data voltage transmitted by the data line is written to the sub-pixels of the first display partition, and then the data voltage transmitted by the data line is written to the sub-pixels of the second display partition.

16. The brightness compensation method for a display panel according to claim 15, wherein, At least two of the display partitions include a third display partition adjacent to the second display partition, the second display partition being located between the first display partition and the third display partition, the refresh rate of the third display partition being lower than the refresh rate of the second display partition, and the method further comprising: In the second display frame, data voltages are written to the sub-pixels of the second display partition, and then data voltages are written to the sub-pixels of the third display partition. The area to be compensated includes a second area to be compensated, the position of which is related to the position of the boundary line between the third display partition and the second display partition; or, the area to be compensated is not related to the position of the boundary line between the third display partition and the second display partition.

17. The brightness compensation method for a display panel according to any one of claims 13-15, further comprising: In the first display frame, the first area to be compensated is brightened. The first display partition and the second display partition are arranged along a first direction, and the data line extends along the first direction.

18. The brightness compensation method for a display panel according to claim 1, wherein, The display panel includes a first gate driving circuit, a multi-row pixel circuit, and multiple partition enable signal lines. The first gate driving circuit includes multiple cascaded shift register groups. Each shift register group includes k cascaded shift register units, where k is an integer greater than or equal to 2. Each shift register unit includes m shift registers, where m is an integer greater than or equal to 1. Different shift register units within the same shift register group are electrically connected to different partition enable signal lines. Different shift register groups are connected to the same k partition enable signal lines. The output of the first-level shift register is electrically connected to n rows of pixel circuits, where n is an integer greater than or equal to 1. The number of rows of pixel circuits in the area to be compensated is greater than or equal to... OK.

19. The brightness compensation method for a display panel according to claim 18, wherein, In the first display frame, the pulse transitions of the signals on the k partition enable signal lines to the enable level are sequentially delayed; in the second display frame, the signals on the k partition enable signal lines are at the enable level. k-1 shift register units are connected between two adjacent shift register units connected to the same partition enable signal line; In the first display frame, the timing at which the pulses of the signals on the k partition enable signal lines transition to the enable level is related to the position of the partition lines.

20. The brightness compensation method for a display panel according to claim 18, wherein, At least two of the display partitions include an adjacent first display partition and a second display partition, the refresh rate of the first display partition is less than the refresh rate of the second display partition, and the area to be compensated includes a first area to be compensated, the position of which is related to the position of the boundary line between the first display partition and the second display partition; At least in the first region to be compensated The pixel circuit described above is located in the second display partition; n is greater than or equal to 2, m is greater than or equal to 8, k is greater than or equal to 4, and at least 64 rows of the pixel circuitry in the first area to be compensated are located in the second display partition.

21. The brightness compensation method for a display panel according to claim 18, wherein, The pixel circuit includes a driving unit and a threshold compensation unit. The threshold compensation unit is connected between the control terminal and the first terminal of the driving unit. The control terminal of the threshold compensation unit is electrically connected to the output terminal of the shift register in the first gate driving circuit. The shift register includes a shift unit and an output unit, the output unit being electrically connected to the shift unit, and the output unit including a first transistor and a second transistor; The control terminals of the first transistor and the second transistor are both connected to the shift unit. The first terminal of the first transistor is electrically connected to the partition enable signal line, and the second terminal of the first transistor is electrically connected to the first terminal of the second transistor and the output terminal of the shift register. The second terminal of the second transistor is electrically connected to the first power signal line.

22. A display device, comprising a display panel and a driving module; The driving module is configured to determine the target driving value of the area to be compensated based on the display data of the area to be compensated when the display panel is a zoned multi-frequency display; wherein... When the display panel is a multi-frequency display with partitions, the display panel includes at least two display partitions with different refresh rates; the position of the area to be compensated is related to the position of the boundary line of the display partitions with different refresh rates.

23. The display device according to claim 22, wherein, The display data includes grayscale levels; The driving module includes a first determining unit and a second determining unit; The first determining unit is configured to determine a first compensation value based on the display grayscale of the sub-pixels of the region to be compensated; The second determining unit is configured to determine the target driving value of the region to be compensated based on the first compensation value; The display grayscale includes a first display grayscale and a second display grayscale. The area to be compensated includes a plurality of sub-pixels. Each sub-pixel in at least a portion of the sub-pixels in the area to be compensated has a different first compensation value corresponding to the first display grayscale and the second display grayscale.

24. The display device according to claim 23, wherein, The area to be compensated includes multiple rows of sub-pixels; The first determining unit is configured to determine the first compensation value based on the row number of the sub-pixels of the area to be compensated, the display grayscale, and the first compensation table, wherein the first compensation table includes multiple rows of first compensation values ​​corresponding to various display grayscales. The first compensation value corresponding to each sub-pixel of the i-th row of the region to be compensated in various display gray levels is the first compensation value of the i-th row in the first compensation table; i is an integer greater than or equal to 1.

25. The display device according to claim 24, wherein, The first compensation value of the Xth row sub-pixel in the area to be compensated at the first display grayscale is different from the first compensation value of the Yth row sub-pixel in the area to be compensated at the first display grayscale. And / or, the first compensation value corresponding to the Xth row sub-pixel in the region to be compensated at the second display grayscale is different from the first compensation value corresponding to the Yth row sub-pixel in the region to be compensated at the second display grayscale, where X and Y are different positive integers.

26. The display device according to claim 22, wherein, The display data includes display grayscale and display brightness level, and the area to be compensated includes multiple rows of sub-pixels; The driving module includes a first determining unit, a third determining unit, and a second determining unit; The first determining unit is configured to determine a first compensation value based on the row number of the sub-pixels of the area to be compensated, the display grayscale, and a first compensation table, wherein the first compensation table includes multiple rows corresponding to first compensation values ​​for various display grayscales. The third determining unit is configured to determine a second compensation value based on the display grayscale and display brightness level of the sub-pixels of the region to be compensated; The second determining unit is configured to determine the target driving value of the region to be compensated based on the first compensation value and the second compensation value.

27. The display device according to claim 26, wherein, The display brightness level includes a first display brightness level and a second display brightness level. For each sub-pixel in at least a portion of the sub-pixels in the area to be compensated, the second compensation value corresponding to the first display grayscale at the first display brightness level is different from the second compensation value corresponding to the first display grayscale at the second display brightness level; and / or, the second compensation value corresponding to the first display grayscale at the first display brightness level is different from the second compensation value corresponding to the second display grayscale at the first display brightness level.

28. A method for debugging a display panel, comprising: A first compensation value is determined based on the row number of the sub-pixels in the area to be compensated, the display grayscale, and the first compensation table, wherein the first compensation table includes the first compensation values ​​corresponding to multiple rows at various display grayscales. The second compensation value is determined based on the display grayscale and display brightness level of the sub-pixels in the area to be compensated; Based on the first compensation value and the second compensation value, a target driving value for the area to be compensated is determined; wherein, the display panel includes at least two display partitions with different refresh rates; the position of the area to be compensated is related to the position of the boundary line of the corresponding display partitions with different refresh rates; When the display uniformity of the display panel does not meet the requirements, under one or more display brightness levels and / or one or more display gray levels, for the same display brightness level and display gray level, the position of the dividing line is adjusted to obtain the brightness of the area to be compensated when the dividing line is located at different positions; Based on the brightness difference or the average of the brightness difference between the brightness of the area to be compensated and the reference brightness when the dividing line is located at different positions, the first compensation value and / or the second compensation value are corrected until the display uniformity of the display panel meets the requirements.

29. The debugging method according to claim 28, wherein, The reference brightness is the center brightness of the display panel; And / or, obtaining the brightness of the area to be compensated when the boundary line is located at different positions includes: The brightness of the area to be compensated is obtained when the dividing line is located in the first, second, and third display sub-areas of the display panel; wherein the first, second, and third display sub-areas are arranged sequentially along a first direction, the first and third display sub-areas are located on opposite sides of the center of the display panel along the first direction, the distance between the first display sub-area and the center of the display panel along the first direction is greater than the distance between the second display sub-area and the center of the display panel along the first direction; the distance between the third display sub-area and the center of the display panel along the first direction is greater than the distance between the second display sub-area and the center of the display panel along the first direction. The display panel includes a data cable that extends along the first direction. The distances between the first display sub-area, the second display sub-area, and the third display sub-area and the chip bonding area of ​​the display panel decrease sequentially; the brightness of the first display sub-area, the second display sub-area, and the third display sub-area decreases sequentially; and the brightness difference between the first display sub-area, the second display sub-area, and the third display sub-area and the center brightness of the display panel increases sequentially.

30. The debugging method according to claim 28, wherein, The step of correcting the first compensation value and / or the second compensation value based on the brightness difference or the average of the brightness difference between the brightness of the area to be compensated and the reference brightness when the boundary line is located at different positions, until the display uniformity of the display panel meets the requirements, includes: Determine the correction parameters based on the brightness difference or the mean of the brightness difference; The product of the second compensation value and the correction parameter is used as the corrected second compensation value.

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