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

Abstract

This invention discloses a brightness compensation method, debugging method, debugging device, and display device for a display panel. The brightness compensation method for the display panel includes: when the display panel is a multi-frequency display with partitions, determining a target driving value for the area to be compensated based on display data of the area to be compensated; 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 between the corresponding display partitions with different refresh rates. This invention provides a brightness compensation method, display device, debugging method, and debugging device for a display panel, which can improve the problem of uneven display brightness in multi-frequency display scenarios.

Description

Technical Field

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

[0002] With the development of display technology, people have increasingly higher requirements for the display effect of display panels.

[0003] Currently, at least two sub-display areas with different refresh rates can be displayed on the same display screen, i.e., multi-frequency partitioned display. However, in the case of multi-frequency partitioned display, there is a problem of poor display. Summary of the Invention

[0004] This invention provides a brightness compensation method, debugging method, debugging device, and display device for a display panel, which can improve the problem of uneven display brightness in multi-frequency display mode.

[0005] According to one aspect of the present invention, 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] Optionally, the displayed data may include grayscale.

[0008] Optionally, based on the displayed data of the area to be compensated, the target driving value of the area to be compensated is determined, including:

[0009] The first compensation value is determined based on the display grayscale of the sub-pixels in the area to be compensated.

[0010] Based on the first compensation value, determine the target driving value of the area to be compensated;

[0011] 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.

[0012] Optionally, the area to be compensated includes multiple rows of sub-pixels;

[0013] Based on the display grayscale of the sub-pixels in the area to be compensated, determine the first compensation value, including:

[0014] The first compensation value is determined based on the row number of the sub-pixels of the area to be compensated, the display gray level, and the first compensation table. The first compensation table includes the first compensation values ​​corresponding to multiple rows at various display gray levels.

[0015] 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;

[0016] 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.

[0017] 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;

[0018] 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 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.

[0019] Optionally, based on the first compensation value, the target driving value of the region to be compensated is determined, including:

[0020] 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;

[0021] 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.

[0022] 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 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. The first area to be compensated is located in 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 display partition and the second display partition, the larger the absolute value of the first compensation value corresponding to the sub-pixel.

[0023] Optional, ΔV = gray*(V GMP -V GSP ) / k1;

[0024] Where ΔV is the driving compensation value, gray is the first compensation value, and V GMP V is the first reference voltage. GSP k1 is the second reference voltage and k1 is the preset register value.

[0025] Optionally, the display data includes grayscale and brightness levels;

[0026] Optionally, the area to be compensated includes multiple rows of sub-pixels;

[0027] Based on the displayed data of the area to be compensated, determine the target driving value of the area to be compensated, including:

[0028] The first compensation value is determined based on the row number of the sub-pixels of the area to be compensated, the display gray level, and the first compensation table. The first compensation table includes the first compensation values ​​corresponding to multiple rows at various display gray levels.

[0029] 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;

[0030] Based on the first compensation value and the second compensation value, determine the target driving value of the area to be compensated;

[0031] 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.

[0032] 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;

[0033] Optionally, the display grayscale includes a first display grayscale and a second display grayscale, 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 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.

[0034] Optionally, if the first display grayscale is smaller than the second display grayscale, then 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 is greater than the second compensation value corresponding to the second display grayscale at the same display brightness level; if the first display brightness level is smaller than the second display brightness level, then the brightness corresponding to the maximum grayscale of the sub-pixel in the first display brightness level is smaller than the brightness corresponding to the maximum grayscale of the sub-pixel in the second display brightness level, then 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 brightness level is greater than the second compensation value corresponding to the second display brightness level at the same display grayscale.

[0035] Optionally, based on the first compensation value and the second compensation value, the target driving value of the region to be compensated is determined, including:

[0036] 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;

[0037] 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.

[0038] Optionally, based on the first and second compensation values ​​of the sub-pixels in the region to be compensated, the driving compensation value corresponding to the sub-pixel is determined, including:

[0039] 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.

[0040] Optional, ΔV = gray * gain * (V GMP -V GSP ) / k1; ΔV=gray*(gain / k2)*(V GMP -V GSP ) / k1;

[0041] Where ΔV is the driving compensation value, gray is the first compensation value, gain is the second compensation value, and V GMP V is the first reference voltage. GSP The second reference voltage is k1, which is the preset register value, and k2 is the set constant.

[0042] 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 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;

[0043] The display panel includes a data cable.

[0044] 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.

[0045] Optionally, the location of the area to be compensated changes as the location of the corresponding boundary line changes;

[0046] 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.

[0047] Optionally, the display panel includes a data cable.

[0048] The method also includes:

[0049] In the first display frame, the target drive value is transmitted via the data line;

[0050] Optionally, the first display frame is a refresh frame for a portion of the display partitions, and the second display frame is a hold frame for another portion of the display partitions.

[0051] 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 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; 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.

[0052] The method also includes:

[0053] 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;

[0054] In the first display frame, the target driving value transmitted by the data line is used as the compensated data voltage and written to the sub-pixel in the first area to be compensated. The first display frame is the refresh frame of the first area to be compensated.

[0055] 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 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; the first area to be compensated includes a first sub-area and a second sub-area, the first sub-area is located in the first display partition, and the second sub-area is located in the second display partition; the display panel includes a data cable,

[0056] 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.

[0057] In the first display frame, the data line transmits the target driving value corresponding to the sub-pixel of the first sub-region after compensating the second data voltage. Then, the data line transmits the target driving value corresponding to the sub-pixel of the second sub-region and writes the target driving value transmitted by the data line as the data voltage into the sub-pixel of the second sub-region. The first display frame is the holding frame of the first sub-region and the refresh frame of the second sub-region.

[0058] 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 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; the display panel includes a data cable.

[0059] 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.

[0060] 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 and third display partitions, and the refresh rate of the third display partition being lower than the refresh rate of the second display partition.

[0061] 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.

[0062] The area to be compensated includes a second area to be compensated, the location of which is related to the location 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 location of the boundary line between the third display partition and the second display partition.

[0063] Optionally, in the first display frame, brightness compensation is applied to the first area to be compensated;

[0064] Optionally, the first display partition and the second display partition are arranged along a first direction, and the data line extends along the first direction.

[0065] Optionally, 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 in 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 terminal 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 the pixel circuits in the area to be compensated is greater than or equal to k*m*n rows.

[0066] Optionally, 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.

[0067] Optionally, k-1 shift register units are connected between two adjacent shift register units connected to the same partition enable signal line;

[0068] 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 line;

[0069] 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 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 k*m*n rows of pixel circuits in the first area to be compensated are located in the second display partition;

[0070] 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.

[0071] Optionally, 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, and 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.

[0072] Optionally, the threshold compensation unit includes an N-type transistor;

[0073] Optionally, 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;

[0074] 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.

[0075] The second terminal of the second transistor is electrically connected to the first power signal line.

[0076] According to another aspect of the present invention, a display device is provided, the display device comprising a display panel and a driving module;

[0077] The driver module is used 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; 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 corresponding display partitions with different refresh rates.

[0078] Optionally, the displayed data may include grayscale.

[0079] Optionally, the driving module includes a first determining unit and a second determining unit;

[0080] The first determining unit is used to determine the first compensation value based on the display grayscale of the sub-pixels of the region to be compensated;

[0081] The second determining unit is used to determine the target driving value of the area to be compensated based on the first compensation value;

[0082] 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.

[0083] Optionally, the area to be compensated includes multiple rows of sub-pixels;

[0084] The first determining unit is specifically used to determine the first compensation value based on the row number of the sub-pixel of 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.

[0085] 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;

[0086] 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.

[0087] 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.

[0088] Optionally, the display data includes grayscale and brightness levels.

[0089] Optionally, the area to be compensated includes multiple rows of sub-pixels;

[0090] The driving module includes a first determining unit, a third determining unit, and a second determining unit;

[0091] The first determining unit is used 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 the first compensation table, wherein the first compensation table includes the first compensation values ​​corresponding to multiple rows at various display grayscales.

[0092] The third determining unit is used to determine the second compensation value based on the display grayscale and display brightness level of the sub-pixels of the area to be compensated;

[0093] The second determining unit is used to determine the target driving value of the area to be compensated based on the first compensation value and the second compensation value;

[0094] 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.

[0095] 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;

[0096] 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.

[0097] According to another aspect of the present invention, a debugging method for a display panel is provided, the debugging method comprising:

[0098] 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. The first compensation table includes the first compensation values ​​corresponding to multiple rows at various display gray levels.

[0099] 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;

[0100] 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;

[0101] When the display uniformity of the display panel does not meet the requirements, for the same display brightness level and display grayscale, 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.

[0102] 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.

[0103] Optionally, the reference brightness is the center brightness of the display panel;

[0104] And / or, obtaining the brightness of the area to be compensated when the boundary line is located at different positions includes:

[0105] 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 and third display sub-areas 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 and third display sub-areas and the center of the display panel along the first direction.

[0106] The display panel includes a data cable that extends along a first direction.

[0107] 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.

[0108] Optionally, based on the brightness difference or the average of the brightness difference between the area to be compensated and the reference brightness when the boundary 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, including:

[0109] Determine the correction parameters based on the brightness difference or the mean of the brightness difference;

[0110] The product of the second compensation value and the correction parameter is used as the corrected second compensation value.

[0111] According to another aspect of the present invention, a debugging device for a display panel is provided, the debugging device comprising: a first determining unit, a second determining unit, a third determining unit, a brightness acquisition unit, and a correction unit;

[0112] The first determining unit is used to determine a first compensation value 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 multiple display gray levels.

[0113] The second determining unit is used to determine the second compensation value based on the display grayscale and brightness level of the sub-pixels of the area to be compensated;

[0114] The third determining unit is used to determine the target driving value of the area to be compensated based on the first compensation value and the second compensation value; 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;

[0115] The brightness acquisition unit is used to adjust the position of the dividing line for the same display brightness level and display gray level 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, so as to obtain the brightness of the area to be compensated when the dividing line is located at different positions.

[0116] The correction unit is used to correct 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.

[0117] This invention provides a brightness compensation method, debugging method, debugging device, and display device for a display panel. The brightness compensation method includes: when the display panel is a multi-frequency display with partitions, 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 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 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, reducing the brightness difference between the vicinity of the boundary line and most other display areas. Since the display data can reflect 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 partitions.

[0118] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0119] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0120] Figure 1 This is a schematic diagram of a display panel displaying the same grayscale image in related technologies;

[0121] Figure 2 This is a schematic diagram of a pixel circuit according to an embodiment of the present invention;

[0122] Figure 3 This is a waveform diagram illustrating the level change of the partition enable signal when a scanning process moves from a display partition with a low refresh rate to a display partition with a high refresh rate.

[0123] Figure 4 This is a schematic flowchart of a brightness compensation method for a display panel according to an embodiment of the present invention;

[0124] Figure 5 This is a flowchart illustrating another brightness compensation method for a display panel according to an embodiment of the present invention;

[0125] Figure 6 This is a flowchart illustrating another brightness compensation method for a display panel according to an embodiment of the present invention;

[0126] Figure 7a This is a schematic diagram of the structure of a display panel according to an embodiment of the present invention;

[0127] Figure 7b This is a schematic diagram of the structure of another display panel provided according to an embodiment of the present invention;

[0128] Figure 7c This is a schematic diagram of the structure of another display panel provided according to an embodiment of the present invention;

[0129] Figure 8 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 the present invention;

[0130] Figure 9 This is a schematic diagram of a shift register according to an embodiment of the present invention;

[0131] Figure 10 This 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 a first display frame, according to an embodiment of the present invention. Figure 11 This is a schematic diagram illustrating 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 the present invention.

[0132] Figure 12 This is a schematic diagram of the structure of a display device according to an embodiment of the present invention;

[0133] Figure 13 This is a flowchart illustrating a debugging method for a display panel according to an embodiment of the present invention;

[0134] Figure 14This is a schematic diagram of the brightness of a display panel when the dividing line is located in the second display sub-area, provided by an embodiment of the present invention;

[0135] Figure 15 This is a schematic diagram of the brightness of a display panel when the dividing line is located in the first display sub-area, as provided in an embodiment of the present invention.

[0136] Figure 16 This is a schematic diagram of the brightness of a display panel when the dividing line is located in the third display sub-area, as provided in an embodiment of the present invention.

[0137] Figure 17 This is a schematic diagram of the structure of a display panel debugging device provided according to an embodiment of the present invention. Detailed Implementation

[0138] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0139] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a 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.

[0140] In related technologies, when the refresh rate of the upper, middle, and lower sections 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 This is a schematic diagram of a display panel displaying the same grayscale image in related technologies. (Reference) 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 the 1Hz to the 120Hz display area, the first part of the sub-pixel rows of the high refresh rate display area appears darker. Figure 2This is a schematic diagram of a pixel circuit according to an embodiment of the present invention, for reference. Figure 2 The pixel driving circuit includes a threshold compensation unit 120. The control terminal of the threshold compensation unit 120 is used 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 the partition enable signal. Figure 3 This is a schematic diagram illustrating 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. (Refer to...) Figure 3 The display panel includes partition enable signal lines, and each partition enable signal line can receive a partition enable signal Vfe output by the chip. After research and analysis by the inventors, the reason why the display partitions at high refresh rates appear darker is as follows: During the scanning process of a local refresh frame, when moving from a display partition at a low refresh rate (e.g., 1Hz) to a display partition at a high refresh rate (120Hz), the partition enable signal Vfe needs to change from a low level to a high level. This is equivalent to the period in a local refresh frame corresponding to the display partition at a low refresh rate (e.g., 1Hz) where the partition enable signal is disabled (e.g., low level) to prevent the first gate drive circuit from outputting a conduction pulse to the display partition at the low refresh rate, continuously outputting the off level of the threshold compensation unit 120. During the scanning period corresponding to the display partition at a high refresh rate (e.g., 120Hz), the partition enable signal Vfe is enabled (e.g., high level) to enable the first gate drive circuit to output a conduction pulse to the display partition at the high refresh rate, thus enabling the threshold compensation unit 120 to conduct. However, the partition enable signal Vfe cannot directly switch from a low level to a high level; there is a certain delay. Figure 3 The rise of the middle partition enable signal Vfe is delayed, causing the first part of the sub-pixel rows in the high refresh rate display partition 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 in the subsequent stable state, and the pull-down coupling of the transistor in the threshold compensation unit 120 is weaker, causing the first part of the sub-pixel rows to appear darker, resulting in an abnormality.

[0141] This embodiment provides a brightness compensation method for a display panel, which can improve the problem of uneven display when the display panel is used for multi-frequency display in different zones. Figure 4 This is a flowchart illustrating a brightness compensation method for a display panel according to an embodiment of the present invention. (Refer to...) Figure 4 The brightness compensation method provided in this embodiment includes the following steps:

[0142] S110. When the display panel is a multi-frequency zone display, obtain the display data of the area to be compensated.

[0143] Specifically, multi-frequency display in a display panel refers to at least two display zones within the same display screen having 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, refer to [link to example]. 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.

[0144] 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.

[0145] 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.

[0146] S120. Determine the target driving value of the area to be compensated based on the displayed data of the area to be compensated.

[0147] 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.

[0148] Specifically, the refresh rates of the display zones on both sides of the dividing line are different. For example, the refresh rate of the display zone on one side of the dividing line can be 1Hz, 5Hz or 10Hz, etc., while the refresh rate of the display zone on the other side of the dividing line can be 60Hz, 90Hz or 120Hz, etc.

[0149] 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.

[0150] 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.

[0151] 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.

[0152] Optionally, the displayed data includes displaying grayscale.

[0153] Specifically, 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 example, determining the drive compensation value based on the display grayscale allows for more accurate brightness compensation in the area to be compensated. For example, the drive compensation value of the target drive value is related to the display grayscale. For example, the drive compensation value of the target drive value is different at at least two display grayscale levels.

[0154] The display grayscale can include all display grayscale levels from the minimum to the maximum range, such as all display grayscale levels from 0 to 255. This allows for precise determination of the target drive value corresponding to each display grayscale level in the area to be compensated, improving the compensation effect. Alternatively, the display grayscale can include only a portion of the display grayscale levels from 0 to 255. Determining the target drive value or drive compensation value for a portion of the display grayscale levels reduces the storage space required to store the target drive value on the display device. The target drive value or drive compensation value corresponding to the remaining display grayscale levels can be determined using an interpolation algorithm.

[0155] Optional, Figure 5 This is a flowchart illustrating another brightness compensation method for a display panel according to an embodiment of the present invention. (Refer to...) Figure 5 The brightness compensation method provided in this embodiment includes the following steps:

[0156] 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.

[0157] Specifically, the first compensation value corresponds to the display grayscale; different display grayscales can correspond to different first compensation values. Different display grayscales can also correspond to the same first compensation value.

[0158] S220. Determine the target driving value of the area to be compensated based on the first compensation value.

[0159] Specifically, 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 be determined jointly based on the original driving data and the first compensation value.

[0160] 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.

[0161] Specifically, 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.

[0162] Optionally, the area to be compensated includes multiple rows of sub-pixels;

[0163] 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:

[0164] 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.

[0165] Specifically, 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 can 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.

[0166] It should be noted that the first register value in Table 1 can be converted into display grayscale, and different first register values ​​correspond to different display grayscale.

[0167] Table 1

[0168]

[0169]

[0170] 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.

[0171] 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.

[0172] Optionally, 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 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, where X and Y are different positive integers. This setting indicates that the first compensation values ​​of different rows of sub-pixels are different at the first display grayscale, and the first compensation values ​​of different rows of sub-pixels are different at the second display grayscale. Combined with... Figure 2 and Figure 3 Because 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.

[0173] 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.

[0174] Specifically, 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.

[0175] In other optional embodiments of the present invention, 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 smaller than the absolute value of a first compensation value corresponding to the second display grayscale.

[0176] Optionally, in step S220 above, determining the target driving value of the region to be compensated based on the first compensation value includes:

[0177] 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;

[0178] 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.

[0179] Specifically, sub-pixels in the area to be compensated may have issues 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 based on the sum of the driving compensation value and the original driving value. Then, the driving compensation value is added on the basis of the original driving value, thereby improving the display effect of the display panel.

[0180] 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.

[0181] Specifically, under the same grayscale, the closer a sub-pixel is to the boundary line, the worse its display performance. To improve the display performance of sub-pixels closer to the boundary line, the absolute value of the first compensation value for sub-pixels closer to the boundary line is set to be larger, which can improve the compensation effect and further improve the display effect of the display panel. During the process of the partition enable signal Vfe switching from low level to high level, the instantaneous voltage of the partition enable signal Vfe corresponding to the output time of the scan pulse of the sub-pixel closer to the boundary line is lower, and the absolute value of the voltage difference between the instantaneous voltage and the steady-state voltage of the partition enable signal Vfe corresponding to the output time of the scan pulse of the sub-pixel closer to the boundary line is larger. That is, the absolute value of the amplitude of the scan pulse of the sub-pixel closer to the boundary line (equal to the instantaneous voltage of the partition enable signal Vfe) is lower, and the higher the gate voltage of the transistor in the threshold compensation unit 120 is compared with the subsequent stable state, the worse the display performance of the sub-pixel closer to the boundary line is, for example, darker. Therefore, the absolute value of the first compensation value corresponding to the sub-pixel closer to the boundary line is larger.

[0182] Optional, ΔV = gray*(V GMP -V GSP ) / k1; where ΔV is the driving compensation value, gray is the first compensation value, and V GMP V is the first reference voltage. GSP k1 is the second reference voltage and k1 is the preset register value.

[0183] Specifically, 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 looking up the first compensation table. As can be seen, 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.

[0184] Optionally, the display data includes grayscale and brightness level.

[0185] Specifically, the target driving value is determined by combining the display grayscale and 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 panel's display performance. For example, 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).

[0186] 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.

[0187] Optionally, the area to be compensated includes multiple rows of sub-pixels.

[0188] Figure 6 This is a flowchart illustrating another brightness compensation method for a display panel according to an embodiment of the present invention. (Refer to...) Figure 6 The brightness compensation method provided in this embodiment includes the following steps:

[0189] 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.

[0190] The first compensation table includes multiple rows of first compensation values ​​corresponding to various display grayscale levels.

[0191] 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.

[0192] Specifically, the second compensation value is determined jointly based on the display grayscale and display brightness level, which makes the determined second compensation value more accurate, thereby accurately compensating for the display brightness of sub-pixels and improving the compensation effect.

[0193] 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.

[0194] Table 2

[0195]

[0196] S330. Determine the target driving value of the area to be compensated based on the first compensation value and the second compensation value.

[0197] Specifically, the target driving value is determined by the first compensation value and the second compensation value together, 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.

[0198] 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.

[0199] Specifically, the first display brightness level and the second display brightness level are different. Before brightness compensation is applied to the sub-pixels, the actual display brightness of the same grayscale is different at different display brightness levels, and the actual display brightness of different grayscales at the same display brightness level is also different. In this embodiment, the absolute values ​​of the second compensation values ​​corresponding to the same grayscale at different display brightness levels are set to be different, and the absolute values ​​of the second compensation values ​​corresponding to different grayscales at the same display brightness level are also 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.

[0200] 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).

[0201] 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).

[0202] Specifically, 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. This embodiment sets a larger absolute value for the first compensation value corresponding to the first display grayscale 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 pronounced the dark bands near the boundary, the larger the absolute value of the second compensation value.

[0203] 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.

[0204] 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:

[0205] 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;

[0206] 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.

[0207] Specifically, the target driving value of a sub-pixel is determined by the first compensation value, the second compensation value, and the original driving value, which can improve the compensation accuracy of the sub-pixel and ultimately improve the display effect of the display panel.

[0208] 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.

[0209] Specifically, the method for determining the first compensation value is relatively simple, and the second compensation value can be obtained directly by querying the second compensation value. The driving compensation value is determined by multiplying 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.

[0210] Optional, ΔV = gray * gain * (V GMP -V GSP ) / k1; ΔV=gray*(gain / k2)*(V GMP -V GSP ) / k1; where ΔV is the driving compensation value, gray is the first compensation value, gain is the second compensation value, and V GMP V is the first reference voltage. GSP The second reference voltage is k1, the preset register value is k2, and the set constant is k2.

[0211] Specifically, gain / k2 can be understood as the 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.

[0212] 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.

[0213] During the transition of the partition enable signal Vfe from low to high, the instantaneous voltage of the partition enable signal Vfe corresponding to the output moment of the scan pulse of the sub-pixel closer to the boundary line is lower. The absolute value of the voltage difference between the instantaneous voltage and the steady-state voltage of the partition enable signal Vfe corresponding to the output moment of the scan pulse of the sub-pixel closer to the boundary line is larger. In other words, the absolute value of the amplitude of the scan pulse of the sub-pixel closer to the boundary line (equal to the instantaneous voltage of the partition enable signal Vfe) is lower. The higher the gate voltage of the transistor in the threshold compensation unit 120 compared to the subsequent stable state, the greater the degree to which the high voltage is lower. Therefore, the display condition of the sub-pixel 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, meaning the compensation degree is greater. Combined with... Figure 2 and Figure 3 The enable level of the partition enable signal corresponding to the sub-pixel closer to the boundary line (for Figure 2 and Figure 3 The lower the voltage (high level), the dimmer the sub-pixel. In this embodiment, setting the absolute value of the driving compensation value corresponding to the sub-pixel closer to the boundary line increases the compensation effect of the sub-pixel closer to the boundary line, making the display brightness of sub-pixels in different rows in the area to be compensated basically the same after brightness compensation, thus improving the brightness compensation effect of the display panel.

[0214] 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 that 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 transition of the partition enable signal Vfe from an disabled level to an enabled level is delayed significantly, resulting in more noticeable dark bands. By compensating the data voltage of the sub-pixels of the first compensation area located in the second display partition in the first display frame—that is, using the target drive value as the data voltage—the dark band phenomenon near the boundary between the first and second display partitions can be improved.

[0215] 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.

[0216] Specifically, 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.

[0217] 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.

[0218] 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.

[0219] 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.

[0220] Specifically, the target driving value can be the data voltage Vdata.

[0221] 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.

[0222] Specifically, within a refresh frame, data can be written to sub-pixels, meaning the gate voltage of the driving transistor will be refreshed. Within 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.

[0223] Optional, Figure 7a This is a schematic diagram of a display panel according to an embodiment of the present invention. 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 a data line, and the brightness compensation method of the display panel further includes: in a second display frame, writing the first data voltage transmitted by the data line to the sub-pixel Px in the first area to be compensated, and the second display frame is a refresh frame for the first area to be compensated; in a first display frame, writing the target driving value transmitted by the data line as the compensated data voltage to the sub-pixel in the first area to be compensated, and the first display frame is a refresh frame for the first area to be compensated.

[0224] Specifically, 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.

[0225] Optional, Figure 7bThis is a schematic diagram of another display panel structure provided by an embodiment of the present invention. 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 the target driving value transmitted by the data line is used as the data voltage and written 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.

[0226] Specifically, the first sub-region and the second sub-region are adjacent, with the dividing line located between them. Within the second display frame, both the first and second display zones are refreshed, therefore there is no issue of uneven display, and brightness compensation is not required for the sub-pixels of either the first or second sub-region.

[0227] 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.

[0228] 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.

[0229] 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.

[0230] Specifically, in the second display frame, the sub-pixels of the first display partition are written with data voltage before the sub-pixels of the second display partition, indicating that the sub-pixels of the first display partition are scanned before the sub-pixels of the second display partition.

[0231] 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.

[0232] 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.

[0233] 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.

[0234] 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.

[0235] Specifically, in the second display frame, the sub-pixels of the second display partition are written with data voltage before the sub-pixels of the third display partition, indicating that the sub-pixels of the second display partition are scanned before the sub-pixels of the third display partition.

[0236] 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.

[0237] 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.

[0238] Optionally, in the first display frame, brightness compensation is applied to the first area to be compensated.

[0239] Specifically, 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.

[0240] 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.

[0241] Specifically, any row of subpixels in the first display partition is displayed before any row of subpixels in the second display partition.

[0242] Figure 7c This is a schematic diagram of the structure of another display panel provided according to an embodiment of the present invention, with reference 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 of the first-level shift register 111 is electrically connected to n-row pixel circuits 1113 via 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 k*m*n rows.

[0243] For example, the number of rows of pixel circuit 1113 in the first compensation area AA0 is greater than or equal to k*m*n rows. For example, the number of rows of pixel circuit 1113 in the second sub-area AA02 in the first compensation area AA0 is greater than or equal to k*m*n rows. For example, the number of rows of pixel circuit 1113 in the second compensation area AA03 is greater than or equal to k*m*n rows.

[0244] In some other embodiments, all shift registers 111 in the first gate drive circuit may be connected to the same partition enable signal line.

[0245] In this configuration, scan lines 1112 extend along a second direction X. The second direction X intersects, for example, with the first direction Y, where data lines Data extend. 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 The diagram 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 of the k*m*n row pixel circuit 1113. Figure 7c The shift register group 10 of the first gate drive circuit in the shown display panel 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 m*n rows of pixel circuits driven by one shift register unit 11, and the number of rows driven by the four partition enable signal lines is one cycle. For example, continue to refer to... Figure 7c , Figure 7c The diagram illustrates the case where k=4, m=4, and n=1. The display panel includes a first display partition AA1, a second display partition AA2, and a third display partition AA3. The first display partition AA1 and the third display partition AA3 have a low refresh rate, while the second display partition AA2 has a high refresh rate. Figure 7cThe left side of the image shows the timing of the partition enable signal in the first display frame (the refresh frame of the second display partition AA2, and the hold frame of the first display partition AA1 and the third display partition AA3). During the scan phase of the first display partition AA1 and the third display partition AA3, the partition enable signal on the partition enable signal line is at a disabled level, such as a low level. During the scan phase of the second display partition AA2, the partition enable signal on the partition enable signal line is at an enabled level, such as a high level. When the partition enable signal on the partition enable signal line VFE1 transitions from a disabled level (e.g., low level) to an enabled 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 the partition enable signal line VFE4 transitions from an enabled level (e.g., high level) to a disabled level (e.g., low level), the ending row pixel circuit in the second display partition AA2 completes data refresh.

[0246] Optional, Figure 8 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 the present invention is provided, with reference 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 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 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, with the delay numbering m*n rows of pixel circuit scan time. For example, the pulse transition times of signals on temporally adjacent partition enable signal lines are spaced m*n rows of pixel circuit scan time apart.

[0247] Specifically, 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 transitions 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 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. Figure 7c Taking the display panel structure shown as an example, combined with Figure 7c and Figure 8In 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 scan 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 in 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 in 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 the 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 in the time period corresponding to the second display partition AA2, and the first display partition AA2 operates in the refresh frame.

[0248] One or more first display frames can be set between adjacent second display frames. The more first display frames set between adjacent second display frames, the lower the refresh rate of the first display partition AA1 and the third display partition AA3.

[0249] Optionally, k-1 shift register units 11 are connected between two adjacent shift register units 11 connected to the same partition enable signal line.

[0250] Specifically, 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.

[0251] 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.

[0252] Specifically, the moment when the pulse of the signal on the k partition enable signal lines jumps to the enable level determines the location where the refresh rate changes in the display panel, that is, it determines the boundary position of the display partitions with different refresh rates.

[0253] Optionally, at least k*m*n rows of pixel circuits in the first area to be compensated are located in the second display partition.

[0254] Specifically, when all the signals on the k partition enable signal lines change to the enable level, k*m*n rows of pixel circuits are lit. However, if the enable level of the signals on the k partition enable signal lines does not reach the required level during the time period when the k*m*n rows of pixel circuits are lit (e.g., ...), the situation will change. Figure 2 When the enable level shown is high, during the transition from low to high level, the signal on the partition enable signal line may fail to reach the required amplitude. This situation can cause the brightness of the k*m*n row pixel circuits to differ from the brightness of other display areas. Therefore, setting at least k*m*n row pixel circuits in the first area to be compensated to be located in the second display partition can improve the brightness compensation effect of the display panel.

[0255] 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.

[0256] Specifically, the output of a first-level shift register (e.g., per-level shift register, or, at least a portion of the shift registers, per-level shift register) 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.

[0257] Optional, continue to refer to Figure 2 and Figure 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. Specifically, the threshold compensation unit 120 is used to compensate the data voltage of the gate 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 serves as the control terminal SN2 of the threshold compensation unit 120 and 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.

[0258] 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.

[0259] 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.

[0260] 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.

[0261] Optionally, the threshold compensation unit includes an N-type transistor.

[0262] Specifically, the N-type transistor is turned on when the level is high. When the enable level is high, the output of the shift register outputs a high level, which enables the threshold compensation unit to turn on.

[0263] The transistors T3 to T10 mentioned above can be P-type transistors or N-type transistors.

[0264] Optional, Figure 9 This is a schematic diagram of a shift register according to an embodiment of the present invention, with reference 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 T21 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.

[0265] Specifically, 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, 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 voltage of the storage capacitor Cst in the pixel circuit remains unchanged. If the voltage on the partition enable signal line VFE (e.g., one of VFE1 to VFE4) is an enabled level, such as a high level, the first gate drive circuit can output a conduction pulse to the N-type transistor in the threshold compensation unit 120, the N-type transistor turns on, and the storage capacitor Cst in the pixel circuit can be charged.

[0266] 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.

[0267] 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.

[0268] Figure 10 This 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 a first display frame, according to an embodiment of the present invention. Figure 11 This 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 a second display frame, according to an embodiment of the present invention. (Refer to...) Figure 7c , Figures 9-11 , Figure 10 and Figure 11The diagram illustrates the case where k=4 and m=4. The display panel can include 3n shift registers. The first display partition AA1, the second display partition AA2, and the third display partition AA3 are each connected to n shift registers. SOUT1-SOUTn are the shift signals output by the shift units in the first n-level shift registers corresponding to the first display partition AA1; SOUTn+1-SOUT2n are the shift signals output by the shift units in the (n+1)-2n-level shift registers corresponding to the second display partition AA2; and SOUT2n+1-SOUT3n are the shift signals output by the shift units in the (2n+1)-3n-level shift registers corresponding to the third display partition AA3. GOUT1-GOUTn are the scan signals output from the first n-stage shift registers corresponding to the first display partition AA1, respectively; GOUTn+1-GOUT2n are the scan signals output from the (n+1)th to the 2nth stage shift registers corresponding to the second display partition AA2, respectively; GOUT2n+1-GOUT3n are the scan signals output from the (2n+1)th to the 3nth stage shift registers corresponding to the third display partition AA3, respectively.

[0269] refer 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 low level VL. The output terminal GOUT of the shift register outputs a disabled level, such as low level VL. The first display partition AA1 and the third display partition AA3 will not receive the enable level pulse 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.

[0270] refer to Figure 11In 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.

[0271] Figure 12 This is a schematic diagram of a display device according to an embodiment of the present invention, with reference 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 used 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 partitions. Wherein, when the display panel 100 is a multi-frequency display with partitions, the display panel 100 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.

[0272] This invention provides a display device including a display panel and a driving module. The driving module, when the display panel is configured for multi-frequency zone display, determines a target driving value for the area to be compensated based on display data of the area to be compensated. 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.

[0273] Optionally, the driver module 200 can be a chip.

[0274] Optionally, the displayed data includes displaying grayscale.

[0275] Optionally, the driving module includes a first determining unit and a second determining unit; the first determining unit is used 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 used to determine a target driving value for the area to be compensated based on the first compensation value.

[0276] 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.

[0277] Optionally, the area to be compensated includes multiple rows of sub-pixels; the first determining unit is specifically used 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.

[0278] 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.

[0279] 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.

[0280] 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.

[0281] Optionally, the display data includes grayscale and brightness level.

[0282] Optionally, the area to be compensated includes multiple rows of sub-pixels;

[0283] The driving module includes a first determining unit, a second determining unit, and a third determining unit. The first determining unit is used 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 second determining unit is used 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 third determining unit is used to determine a target driving value for the area to be compensated based on the first compensation value and the second compensation value.

[0284] 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.

[0285] 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.

[0286] The display device provided in this embodiment has corresponding beneficial effects to the brightness compensation method of the display panel provided in any embodiment of the present invention. Technical details not covered in this embodiment can be found in the brightness compensation method of the display panel provided in any embodiment of the present invention. This embodiment can be combined with some or all of the features in the above embodiments, which will not be repeated here.

[0287] Figure 13 This is a flowchart illustrating a debugging method for a display panel according to an embodiment of the present invention. (Refer to...) Figure 13 The debugging method provided in this embodiment includes the following steps:

[0288] 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.

[0289] 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.

[0290] S430. Determine the target driving value of the area to be compensated based on the first compensation value and the second compensation value.

[0291] 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.

[0292] It should be noted that details regarding steps S410 to S430 can be found in the description of the brightness compensation method for display panels, and will not be repeated here. The target driving values ​​determined in steps S410 to S430 are applicable to various display panels.

[0293] 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.

[0294] Specifically, after determining the target driving value, the display panel is driven by 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. 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.

[0295] 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.

[0296] Specifically, 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.

[0297] This invention provides a method for debugging a display panel. The method includes: first, determining 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; then, determining a second compensation value based on the display grayscale and display brightness level of the sub-pixels in the area to be compensated; and finally, determining a target driving value for the area to be compensated based on the first and second compensation values. After driving the sub-pixels to display using the target driving value, if the display uniformity of the display panel does not meet the requirements, controlling the display panel to display at one or more display brightness levels and / or one or more display grayscales, and repeatedly adjusting the position of the dividing line to obtain the brightness of the area to be compensated when the dividing line is at different positions. Then, correcting the first compensation value and / or the second compensation value 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.

[0298] Optionally, the reference brightness is the center brightness of the display panel;

[0299] And / or, obtaining the brightness of the area to be compensated when the boundary line is located at different positions includes:

[0300] 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.

[0301] Specifically, 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 This 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 the present invention. Figure 15 This is a schematic diagram of the brightness of the display panel when the dividing line is located in the first display sub-area, as provided in an embodiment of the present invention. Figure 16 This is a schematic diagram of the brightness of a display panel when the dividing line is located in the third display sub-area, as provided in an embodiment of the present invention. 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; and 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 grayscale at the same display brightness level, 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 a more uniform brightness under the action of the corrected first compensation value and / or the second compensation value. In addition, there is no need to add a compensation table, reducing the storage space occupied by the chip.

[0302] 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.

[0303] 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.

[0304] Specifically, different brightness differences or the mean of brightness differences correspond to different correction parameters.

[0305] Figure 17 This is a schematic diagram of a display panel debugging device according to an embodiment of the present invention, with reference 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 used 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 first compensation values ​​corresponding to multiple rows at various display grayscales; the second determining unit 520 is used 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 used to determine a target driving value for the area to be compensated based on the first compensation value and the second compensation value; wherein, the display panel includes a refresh rate... 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 used to adjust the position of the boundary line for the same display brightness level and display grayscale 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 grayscale levels, to obtain the brightness of the area to be compensated when the boundary line is located at different positions; the correction unit 550 is used 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.

[0306] The display panel debugging device provided in this embodiment has the same beneficial effects as the display panel debugging method provided in any embodiment of the present invention. For technical details not covered in this embodiment, please refer to the display panel debugging method provided in any embodiment of the present invention.

[0307] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0308] 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 method for brightness compensation of a display panel, characterized in that, Comprising: In the case that the display panel is in a partitioned multi-frequency display, a target driving value of the to-be-compensated region is determined according to display data of the to-be-compensated region; wherein, in the case that the display panel is in a partitioned multi-frequency display, the display panel comprises at least two display partitions with different refresh frequencies; the position of the to-be-compensated region is related to the position of the boundary line of the display partition with different corresponding refresh frequencies; The display data comprises display gray scale and display brightness level; The to-be-compensated region comprises multiple rows of sub-pixels; The target driving value of the to-be-compensated region is determined according to the display data of the to-be-compensated region, comprising: A first compensation value is determined according to the row number, display gray scale and first compensation table of the sub-pixel of the to-be-compensated region, wherein the first compensation table comprises multiple rows of first compensation values corresponding to multiple display gray scales respectively; A second compensation value is determined according to the display gray scale and display brightness level of the sub-pixel of the to-be-compensated region; The target driving value of the to-be-compensated region is determined according to the first compensation value and the second compensation value. 2.The brightness compensation method of a display panel according to claim 1, wherein, The display gray scale comprises a first display gray scale and a second display gray scale, the to-be-compensated region comprises multiple sub-pixels, and the first compensation value corresponding to the first display gray scale and the second display gray scale is different for each sub-pixel in at least a part of the number of sub-pixels in the to-be-compensated region. 3.The brightness compensation method of the display panel according to claim 1, characterized in that, The first compensation value corresponding to multiple display gray scales for each sub-pixel in the i-th row of sub-pixels in the to-be-compensated region is the i-th row of first compensation values in the first compensation table; i is an integer greater than or equal to 1.

4. The brightness compensation method of a display panel according to claim 2, wherein, The first display gray scale is smaller than the second display gray scale, and the absolute value of the first compensation value corresponding to the first display gray scale is greater than the absolute value of the first compensation value corresponding to the second display gray scale for each sub-pixel in at least a part of the number of sub-pixels in the to-be-compensated region.

5. The brightness compensation method of a display panel according to claim 1, wherein The at least two display partitions comprise a first display partition and a second display partition adjacent to each other, the refresh frequency of the first display partition is smaller than the refresh frequency of the second display partition, and the to-be-compensated region comprises a first to-be-compensated region, the position of the first to-be-compensated region is related to the position of the boundary line of the first display partition and the second display partition; At least a part of the first to-be-compensated region is located in the second display partition, and the first to-be-compensated region is located in at least a part of the number of sub-pixels in the second display partition, under the same display gray scale, the closer the distance between the sub-pixel and the boundary line of the first display partition and the second display partition, the greater the absolute value of the first compensation value corresponding to the sub-pixel.

6. The brightness compensation method of the display panel according to claim 1, characterized in that: The display gray scale comprises a first display gray scale and a second display gray scale, and the first compensation value corresponding to the first display gray scale for the X-th row of sub-pixels in the to-be-compensated region is different from the first compensation value corresponding to the first display gray scale for the Y-th row of sub-pixels in the to-be-compensated region, And / or, a first compensation value corresponding to the second display gray scale of a first X row of sub-pixels in the to-be-compensated area is different from a first compensation value corresponding to the second display gray scale of a first Y row of sub-pixels in the to-be-compensated area, X and Y are different positive integers.

7. The brightness compensation method of a display panel according to claim 1, wherein The display gray scale includes a first display gray scale and a second display gray scale, the display brightness level includes a first display brightness level and a second display brightness level, and the absolute value of a second compensation value corresponding to the first display gray scale at the first display brightness level of each of the at least part of the number of sub-pixels in the to-be-compensated area is different from the absolute value of a second compensation value corresponding to the first display gray scale at the second display brightness level; and / or, the absolute value of a second compensation value corresponding to the first display gray scale at the first display brightness level is different from the absolute value of a second compensation value corresponding to the second display gray scale at the first display brightness level; the absolute value of a second compensation value corresponding to the second display gray scale at the first display brightness level is different from the absolute value of a second compensation value corresponding to the second display gray scale at the second display brightness level; and / or, the absolute value of a second compensation value corresponding to the first display gray scale at the second display brightness level is different from the absolute value of a second compensation value corresponding to the second display gray scale at the second display brightness level.

8. The brightness compensation method of a display panel according to claim 7, wherein, The first display gray scale is smaller than the second display gray scale, and the absolute value of a second compensation value corresponding to the first display gray scale at the same display brightness level of each of the at least part of the number of sub-pixels in the to-be-compensated area is greater than the absolute value of a second compensation value corresponding to the second display gray scale; the first display brightness level is smaller than the second display brightness level, and the brightness corresponding to the maximum gray scale of the sub-pixel at the first display brightness level is smaller than the brightness corresponding to the maximum gray scale at the second display brightness level, and the absolute value of a second compensation value corresponding to the first display brightness level at the same display gray scale of each of the at least part of the number of sub-pixels in the to-be-compensated area is greater than the absolute value of a second compensation value corresponding to the second display brightness level.

9. The brightness compensation method of a display panel according to claim 1, wherein, The determining the target driving value of the to-be-compensated area according to the first compensation value and the second compensation value includes: determining a driving compensation value corresponding to the sub-pixel according to the first compensation value and the second compensation value of the sub-pixel in the to-be-compensated area; determining the target driving value corresponding to the sub-pixel according to the driving compensation value corresponding to the sub-pixel and the original driving value corresponding to the sub-pixel.

10. The brightness compensation method of a display panel according to claim 9, wherein, The determining a driving compensation value corresponding to the sub-pixel according to the first compensation value and the second compensation value includes: determining a driving compensation value of a sub-pixel in the to-be-compensated area according to the product of the first compensation value and the second compensation value.

11. The brightness compensation method of a display panel according to claim 10, wherein, ； wherein ΔV is the driving compensation value, gray is the first compensation value, gain is the second compensation value, V GMP is a first reference voltage, V GSP is a second reference voltage, k1 is a preset register value, and k2 is a set constant.

12. The brightness compensation method of a display panel according to claim 10, wherein, ； Wherein, ΔV is the driving compensation value, gray is the first compensation value, gain is the second compensation value, V GMP is a first reference voltage, V GSP is a second reference voltage, and k1 is a preset register value.

13. The method of claim 1, wherein, The at least two display partitions include adjacent first and second display partitions, the refresh frequency of the first display partition is less than that of the second display partition, and the to-be-compensated region includes a first to-be-compensated region, the position of the first to-be-compensated region is related to the position of the boundary line between the first and second display partitions; At least part of the first to-be-compensated region is located in the second display partition, the closer the sub-pixel in the first to-be-compensated region to the boundary line between the first and second display partitions, the greater the absolute value of the corresponding driving compensation value of the sub-pixel. The display panel includes a data line, In a 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.

14. The brightness compensation method of a display panel according to claim 1, wherein, The position of the to-be-compensated region changes with the position of the corresponding boundary line; And / or, the to-be-compensated region is located on one side of the corresponding boundary line, or part of the to-be-compensated region is located on one side of the corresponding boundary line, and another part of the to-be-compensated region is located on the other side of the corresponding boundary line.

15. The method of claim 1, wherein, The display panel includes a data line, The method further includes: In a first display frame, the target driving value is transmitted by a data line.

16. The brightness compensation method of a display panel according to claim 15, wherein, The first display frame is a refresh frame of a part of the display partitions, and the first display frame is a holding frame of another part of the display partitions.

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

18. The method of brightness compensation of a display panel according to claim 1, wherein, The at least two display partitions include adjacent first and second display partitions, the refresh frequency of the first display partition is less than that of the second display partition, and the to-be-compensated region includes a first to-be-compensated region, the position of the first to-be-compensated region is related to the position of the boundary line between the first and second display partitions; The first to-be-compensated region includes a first sub-region and a second sub-region, the first sub-region is located in the first display partition, and the second sub-region is located in the second display partition; and the display panel includes a data line, The method further includes: In a first display frame, the target driving value is transmitted by a data line. The first display frame is a refresh frame of a part of the display partitions, and the first display frame is a holding frame of another part of the display partitions. In a second display frame, a second data voltage transmitted by the data line is written to the sub-pixels in the first sub-region, and then a third data voltage transmitted by the data line is written to the sub-pixels in the second sub-region, the second display frame being a refresh frame of the first sub-region and a refresh frame of the second sub-region; In a first display frame, the data line transmits a target driving value corresponding to the first sub-region sub-pixels after compensating the second data voltage, and then the data line transmits the target driving value corresponding to the second sub-region sub-pixels, and writes the target driving value transmitted by the data line to the sub-pixels in the second sub-region as a data voltage, the first display frame being a holding frame of the first sub-region and a refresh frame of the second sub-region.

19. The method of brightness compensation of a display panel according to claim 1, wherein, The at least two display regions include a first display region and a second display region adjacent to each other, the refresh frequency of the first display region is less than that of the second display region, the to-be-compensated region includes a first to-be-compensated region, the position of the first to-be-compensated region is related to the position of a boundary line between the first display region and the second display region, and the display panel includes a data line, In a second display frame, a second data voltage transmitted by the data line is written to the sub-pixels in the first sub-region, and then a third data voltage transmitted by the data line is written to the sub-pixels in the second sub-region, the second display frame being a refresh frame of the first sub-region and a refresh frame of the second sub-region; 20. The brightness compensation method of a display panel according to claim 19, wherein, The at least two display regions include a third display region adjacent to the second display region, the second display region is located between the first display region and the third display region, and the refresh frequency of the third display region is less than that of the second display region, In a second display frame, a second data voltage transmitted by the data line is written to the sub-pixels in the first sub-region, and then a third data voltage transmitted by the data line is written to the sub-pixels in the second sub-region, the second display frame being a refresh frame of the first sub-region and a refresh frame of the second sub-region; The to-be-compensated region includes a second to-be-compensated region, and the position of the second to-be-compensated region is related to the position of a boundary line between the third display region and the second display region. Or, the to-be-compensated region is not related to the position of the boundary line between the third display region and the second display region.

21. The brightness compensation method of the display panel according to any one of claims 17-19, wherein, In a first display frame, the first to-be-compensated region is subjected to brightening compensation.

22. The brightness compensation method of a display panel according to claim 21, wherein, The first display region and the second display region are arranged along a first direction, and a data line extends along the first direction.

23. The method of brightness compensation of a display panel according to claim 1, wherein, The display panel comprises a first gate drive circuit, a plurality of rows of pixel circuits, and a plurality of partitioned enable signal lines, the first gate drive circuit comprises a plurality of cascaded shift register groups, each shift register group comprises k cascaded shift register units, k is an integer greater than or equal to 2, each shift register unit comprises m shift registers, m is an integer greater than or equal to 1, different shift register units in the same shift register group are electrically connected to different partitioned enable signal lines, different shift register groups are connected to the same k partitioned enable signal lines, the output end of a first shift register is electrically connected to n rows of pixel circuits, n is an integer greater than or equal to 1, and the number of rows of pixel circuits in the to-be-compensated area is greater than or equal to rows.

24. The brightness compensation method of a display panel according to claim 23, wherein, In a first display frame, the time when the pulse jump of the signals on the k partition enable signal lines to the enable level is delayed in turn, and in a second display frame, the signals on the k partition enable signal lines are at the enable level.

25. The method of brightness compensation for a display panel according to claim 23, wherein, Between two adjacent shift register units connected with the same partition enable signal line, k-1 shift register units are connected.

26. The method of brightness compensation of a display panel according to claim 23, wherein, In a first display frame, the time when the pulse jump of the signals on the k partition enable signal lines to the enable level is related to the position of the boundary line.

27. The method of brightness compensation of a display panel according to claim 23, wherein, The at least two display partitions include adjacent first and second display partitions, the refresh frequency of the first display partition is less than that of the second display partition, and the to-be-compensated region includes a first to-be-compensated region, the position of the first to-be-compensated region is related to the position of a boundary line between the first and second display partitions. At least one of the first to be compensated regions The pixel circuit is located in the second display subarea.

28. The method of brightness compensation of a display panel according to claim 23, wherein, 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 to-be-compensated region are located in the second display partition.

29. The method of brightness compensation of a display panel according to claim 23, 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, and the control terminal of the threshold compensation unit is electrically connected with the output terminal of the shift register in the first gate drive circuit.

30. The brightness compensation method of a display panel according to claim 29, wherein, The threshold compensation unit includes an N-type transistor.

31. The method of brightness compensation of a display panel according to claim 23, wherein, The shift register includes a shift unit and an output unit, the output unit is electrically connected with the shift unit, and the output unit includes a first transistor and a second transistor. The control terminal of the first transistor and the control terminal of the second transistor are both connected with the shift unit, the first terminal of the first transistor is electrically connected with the partition enable signal line, the second terminal of the first transistor is electrically connected with 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 with a first power supply signal line.

32. A display device comprising: The display panel and a driving module are included. The driving module is configured to determine a target driving value of a to-be-compensated region according to display data of the to-be-compensated region when the display panel is in a partition multi-frequency display mode, wherein the display panel includes at least two display partitions with different refresh frequencies when the display panel is in the partition multi-frequency display mode, and the position of the to-be-compensated region is related to the position of a boundary line between the display partitions with different refresh frequencies. The display data includes display gray scales and display brightness levels. The to-be-compensated region 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 according to the row number, display gray scale and first compensation table of the sub-pixel of the to-be-compensated region, wherein the first compensation table includes multiple rows of first compensation values corresponding to multiple display gray scales. The third determining unit is configured to determine a second compensation value according to the display gray scale and display brightness level of the sub-pixel of the to-be-compensated region. The second determining unit is configured to determine the target driving value of the to-be-compensated region according to the first compensation value and the second compensation value.

33. The display device of claim 32, wherein The display gray scales include first and second display gray scales, the to-be-compensated region includes multiple sub-pixels, and the first compensation values corresponding to the first and second display gray scales are different for each of at least a portion of the sub-pixels in the to-be-compensated region.

34. The display device of claim 32, wherein, A first compensation value corresponding to each sub-pixel of an i-th row of sub-pixels in the to-be-compensated region at a plurality of display gray scales is an i-th row of first compensation values in the first compensation table; i is an integer greater than or equal to 1.

35. The display device of claim 32, wherein, The display gray scales include a first display gray scale and a second display gray scale, a first compensation value corresponding to the X-th row of sub-pixels in the to-be-compensated region at the first display gray scale is different from a first compensation value corresponding to the Y-th row of sub-pixels in the to-be-compensated region at the first display gray scale, And / or, a first compensation value corresponding to the X-th row of sub-pixels in the to-be-compensated region at the second display gray scale is different from a first compensation value corresponding to the Y-th row of sub-pixels in the to-be-compensated region at the second display gray scale, X and Y are different positive integers.

36. The display device of claim 32, wherein, The display gray scales include a first display gray scale and a second display gray scale, the display brightness levels include a first display brightness level and a second display brightness level, a second compensation value corresponding to the first display gray scale at the first display brightness level of each of the at least partial number of sub-pixels in the to-be-compensated region is different from a second compensation value corresponding to the first display gray scale at the second display brightness level; and / or, a second compensation value corresponding to the first display gray scale at the first display brightness level is different from a second compensation value corresponding to the second display gray scale at the first display brightness level.

37. A method for debugging a display panel, characterized in that, Comprise: Determining a first compensation value according to a row number of a sub-pixel in a to-be-compensated region, a display gray scale, and a first compensation table, wherein the first compensation table comprises a plurality of rows of first compensation values corresponding to a plurality of display gray scales respectively; Determining a second compensation value according to a display gray scale and a display brightness level of a sub-pixel in the to-be-compensated region; Determining a target driving value of the to-be-compensated region according to the first compensation value and the second compensation value; wherein the display panel comprises at least two display partitions with different refresh frequencies; the position of the to-be-compensated region is related to the position of the boundary line of the display partition with a corresponding different refresh frequency; When the display uniformity of the display panel does not meet the requirements, adjusting the position of the boundary line for the same display brightness level and display gray scale under one or more display brightness levels and / or one or more display gray scales to obtain the brightness of the to-be-compensated region when the boundary line is located at different positions; According to the brightness difference or the average of the brightness difference between the brightness of the to-be-compensated region when the boundary line is located at different positions and the reference brightness, the first compensation value and / or the second compensation value is corrected until the display uniformity of the display panel meets the requirements.

38. The commissioning method of claim 37, wherein, The reference brightness is the center brightness of the display panel; And / or, the obtaining of the brightness of the to-be-compensated region when the boundary line is located at different positions comprises: obtaining luminance of the to-be-compensated region when the demarcation line is located at the first display sub-region, the second display sub-region and the third display sub-region of the display panel; wherein the first display sub-region, the second display sub-region and the third display sub-region are arranged in sequence along a first direction, the first display sub-region and the third display sub-region are located at opposite sides of the center of the display panel along the first direction, the distance between the first display sub-region and the center of the display panel along the first direction is greater than the distance between the second display sub-region and the center of the display panel along the first direction, and the distance between the third display sub-region and the center of the display panel along the first direction is greater than the distance between the second display sub-region and the center of the display panel along the first direction; the display panel comprises a data line, and the data line extends along the first direction.

39. The commissioning method of claim 38, wherein, the distance between the first display sub-region, the second display sub-region and the third display sub-region and the chip bonding area of the display panel decreases in sequence, the luminance of the first display sub-region, the second display sub-region and the third display sub-region decreases in sequence, and the luminance difference between the first display sub-region, the second display sub-region and the third display sub-region and the center luminance of the display panel increases in sequence.

40. The commissioning method of claim 37, wherein, the first compensation value and / or the second compensation value are corrected according to the luminance difference or the average of the luminance difference between the luminance of the to-be-compensated region and the reference luminance when the demarcation line is located at different positions, until the display uniformity of the display panel meets the requirement, comprising: determining a correction parameter according to the luminance difference or the average of the luminance difference; taking the product of the second compensation value and the correction parameter as the corrected second compensation value.

41. A device for debugging a display panel, characterized in that, comprising: a first determining unit, a second determining unit, a third determining unit, a luminance obtaining unit and a correction unit; the first determining unit is configured to determine a first compensation value according to the row number, display gray scale and first compensation table of the sub-pixel in the to-be-compensated region, wherein the first compensation table comprises a plurality of rows of first compensation values corresponding to a plurality of display gray scales respectively; the second determining unit is configured to determine a second compensation value according to the display gray scale and luminance level of the sub-pixel in the to-be-compensated region; the third determining unit is configured to determine a target driving value of the to-be-compensated region according to the first compensation value and the second compensation value; wherein the display panel comprises at least two display partitions with different refresh frequencies; the position of the to-be-compensated region is related to the position of the demarcation line of the display partition with different corresponding refresh frequencies; the luminance obtaining unit is configured to, when the display uniformity of the display panel does not meet the requirement, adjust the position of the demarcation line under one or more display luminance levels and / or one or more display gray scales, and obtain the luminance of the to-be-compensated region when the demarcation line is located at different positions for the same display luminance level and display gray scale; the correction unit is configured to correct the first compensation value and / or the second compensation value according to the luminance difference or the average of the luminance difference between the luminance of the to-be-compensated region and the reference luminance when the demarcation line is located at different positions, until the display uniformity of the display panel meets the requirement.

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