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

Abstract

The invention discloses a brightness compensation method, a debugging method and a debugging device of a display panel and a display device. The brightness compensation method of the display panel comprises the steps of determining a target driving value of a to-be-compensated area according to display data of the to-be-compensated area under the condition that the display panel is in partitioned multi-frequency display; wherein the display panel comprises at least two display subareas with different refresh frequencies under the condition that the display panel is in subarea multi-frequency display; the position of the to-be-compensated area is related to the position of the boundary of the corresponding display subareas with different refresh frequencies. The invention provides a brightness compensation method of a display panel, a display device, a debugging method and a debugging device, which can improve the problem of non-uniform display brightness of the display panel under the condition of partition multi-frequency display.

Description

Technical Field

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

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

[0003] At present, at least two sub-display areas with different refresh frequencies can be displayed in the same display screen, that is, sub-area multi-frequency display. However, in the case of sub-area multi-frequency display, there is a problem of poor display. Summary of the invention

[0004] The present invention provides a brightness compensation method, a debugging method and a debugging device of a display panel, and a display device, which can improve the problem of uneven display brightness of the display panel in the case of partitioned multi-frequency display.

[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] In the case where the display panel is a partitioned multi-frequency display, the target driving value of the area to be compensated is determined based on the display data of the area to be compensated; wherein, in the case where the display panel is a partitioned multi-frequency display, the display panel includes at least two display partitions with different refresh frequencies; the position of the area to be compensated is related to the position of the dividing line of the corresponding display partitions with different refresh frequencies.

[0007] Optionally, the display data includes display grayscale;

[0008] Optionally, determining a target driving value of the area to be compensated according to display data of the area to be compensated includes:

[0009] Determining a first compensation value according to a display grayscale of a sub-pixel in the area to be compensated;

[0010] Determining a target driving value of the area to be compensated according to the first compensation value;

[0011] Optionally, the display grayscale includes a first display grayscale and a second display grayscale, the area to be compensated includes a plurality of sub-pixels, and 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 a plurality of rows of sub-pixels;

[0013] Determining a first compensation value according to a display grayscale of a sub-pixel in the area to be compensated includes:

[0014] Determine a first compensation value according to the row number of the sub-pixel in the area to be compensated, the display grayscale and a first compensation table, wherein the first compensation table includes a plurality of rows of first compensation values ​​corresponding to a plurality of display grayscales;

[0015] Optionally, the first compensation values ​​corresponding to each sub-pixel in the i-th row of sub-pixels in the area to be compensated at multiple display grayscales are the first compensation values ​​in the i-th row of the first compensation table; i is an integer greater than or equal to 1;

[0016] Optionally, the first compensation value corresponding to the first display grayscale of the sub-pixel in the Xth row in the area to be compensated is different from the first compensation value corresponding to the first display grayscale of the sub-pixel in the Yth row in the area to be compensated.

[0017] and / or, a first compensation value corresponding to the second display grayscale of the sub-pixels in the Xth row in the area to be compensated is different from a first compensation value corresponding to the second display grayscale of the sub-pixels in the Yth row in the area to be compensated, and X and Y are different positive integers;

[0018] 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, an absolute value of a first compensation value corresponding to the first display grayscale is greater than an absolute value of the first compensation value corresponding to the second display grayscale.

[0019] Optionally, determining a target driving value of the area to be compensated according to the first compensation value includes:

[0020] Determine a driving compensation value corresponding to the sub-pixel according to a first compensation value of the sub-pixel in the area to be compensated;

[0021] Determining a target driving value of the sub-pixel according to 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, a refresh frequency of the first display partition is less than a refresh frequency of the second display partition, the area to be compensated includes a first area to be compensated, and a position of the first area to be compensated is related to a position of a boundary line between the first display partition and the second display partition; at least a portion of the first area to be compensated is located in the second display partition, and the first area to be compensated is located in at least a portion of the number of sub-pixels in the second display partition, and at the same display grayscale, the closer the distance between the sub-pixel and the boundary line between the first display partition and the second display partition, the greater the absolute value of the first compensation value corresponding to the sub-pixel;

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

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

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

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

[0027] According to the display data of the area to be compensated, the target driving value of the area to be compensated is determined, including:

[0028] Determine a first compensation value according to the row number of the sub-pixel in the area to be compensated, the display grayscale and a first compensation table, wherein the first compensation table includes a plurality of rows of first compensation values ​​corresponding to a plurality of display grayscales;

[0029] Determining a second compensation value according to a display grayscale and a display brightness level of a sub-pixel in the area to be compensated;

[0030] Determining a target driving value of the area to be compensated according to the first compensation value and the second compensation value;

[0031] Optionally, the first compensation value corresponding to the first display grayscale of the sub-pixel in the Xth row in the area to be compensated is different from the first compensation value corresponding to the first display grayscale of the sub-pixel in the Yth row in the area to be compensated.

[0032] and / or, a first compensation value corresponding to the second display grayscale of the sub-pixels in the Xth row in the area to be compensated is different from a first compensation value corresponding to the second display grayscale of the sub-pixels in the Yth row in the area to be compensated, and 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 of 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, the first display grayscale is smaller than the second display grayscale, and for each sub-pixel of at least a portion of the sub-pixels in the area to be compensated, at the same display brightness level, a second compensation value corresponding to the first display grayscale is greater than the second compensation value corresponding to the second display grayscale; the first display brightness level is smaller than the second display brightness level, and the brightness corresponding to the maximum grayscale of the sub-pixel at the first display brightness level is less than the brightness corresponding to the maximum grayscale at the second display brightness level, and for each sub-pixel of at least a portion of the sub-pixels in the area to be compensated, at the same display grayscale, a second compensation value corresponding to the first display brightness level is greater than the second compensation value corresponding to the second display brightness level.

[0035] Optionally, determining a target driving value of the area to be compensated according to the first compensation value and the second compensation value includes:

[0036] Determine a driving compensation value corresponding to the sub-pixel according to a first compensation value and a second compensation value of the sub-pixel in the area to be compensated;

[0037] Determine a target driving value corresponding to the sub-pixel according to a driving compensation value corresponding to the sub-pixel and an original driving value corresponding to the sub-pixel;

[0038] Optionally, determining the 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 area to be compensated includes:

[0039] Determining a driving compensation value of a sub-pixel in the area to be compensated according to a product of the first compensation value and the second compensation value;

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

[0041] Among them, ΔV is the driving compensation value, gray is the first compensation value, gain is the second compensation value, V GMP is the first reference voltage, V GSP is the second reference voltage, k1 is the preset register value, and k2 is the set constant;

[0042] Optionally, the at least two display partitions include an adjacent first display partition and a second display partition, a refresh frequency of the first display partition is lower than a refresh frequency of the second display partition, the area to be compensated includes a first area to be compensated, and a position of the first area to be compensated is related to a position of a 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 distance between a sub-pixel in the first area to be compensated and located in the second display partition and the boundary line between the first display partition and the second display partition is, the greater the absolute value of the driving compensation value corresponding to the sub-pixel is;

[0043] The display panel includes a data line,

[0044] In the second display frame, the data voltage transmitted by the data line is written into the sub-pixels of the first display partition, and then the data voltage transmitted by the data line is written into the sub-pixels of the second display partition.

[0045] Optionally, the position of the area to be compensated varies with the position of the corresponding dividing line;

[0046] And / or, the area to be compensated is located on one side of the corresponding dividing line, or a part of the area to be compensated is located on one side of the corresponding dividing line, and another part of the area to be compensated is located on the other side of the corresponding dividing line.

[0047] Optionally, the display panel includes a data line,

[0048] The method also includes:

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

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

[0051] Optionally, the at least two display partitions include an adjacent first display partition and a second display partition, a refresh frequency of the first display partition is less than a refresh frequency of the second display partition, the area to be compensated includes a first area to be compensated, and a position of the first area to be compensated is related to a position of a boundary line between the first display partition and the second display partition; the first area to be compensated is located on one side of a 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 line,

[0052] The method also includes:

[0053] In a second display frame, the first data voltage transmitted by the data line is written into the sub-pixels in the first area to be compensated, and the second display frame is a 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 into the sub-pixels in the first area to be compensated. The first display frame is a refresh frame of the first area to be compensated.

[0055] Optionally, the at least two display partitions include a first display partition and a second display partition that are adjacent to each other, the refresh frequency of the first display partition is less than the refresh frequency of the second display partition, the area to be compensated includes a first area to be compensated, and the position of the first area to be compensated is related to the position of the boundary 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 line,

[0056] In the second display frame, the second data voltage transmitted by the data line is written into the sub-pixel in the first sub-area, and then the third data voltage transmitted by the data line is written into the sub-pixel in the second sub-area. The second display frame is a refresh frame of the first sub-area, and the second display frame is a refresh frame of the second sub-area.

[0057] In the first display frame, the data line transmits the target drive value corresponding to the sub-pixel in the first sub-area obtained after compensating the second data voltage, and then the data line transmits the target drive value corresponding to the sub-pixel in the second sub-area, and the target drive value transmitted by the data line is written into the sub-pixel in the second sub-area as the data voltage. The first display frame is a hold frame for the first sub-area, and the first display frame is a refresh frame for the second sub-area.

[0058] Optionally, the at least two display partitions include a first display partition and a second display partition that are adjacent to each other, a refresh frequency of the first display partition is lower than a refresh frequency of the second display partition, the area to be compensated includes a first area to be compensated, and a position of the first area to be compensated is related to a position of a boundary line between the first display partition and the second display partition; the display panel includes a data line,

[0059] In the second display frame, the data voltage transmitted by the data line is written into the sub-pixels of the first display partition, and then the data voltage transmitted by the data line is written into the sub-pixels of the second display partition.

[0060] Optionally, the at least two display partitions include a third display partition adjacent to the second display partition, the second display partition is located between the first display partition and the third display partition, and a refresh frequency of the third display partition is lower than a refresh frequency of the second display partition.

[0061] In a second display frame, writing data voltages to sub-pixels in the second display sub-area, and then writing data voltages to sub-pixels in the third display sub-area;

[0062] The area to be compensated includes a second area to be compensated, the position of the second area to be compensated is related to the position of the boundary between the third display partition and the second display partition; or the area to be compensated is not related to the position of the boundary between the third display partition and the second display partition.

[0063] Optionally, in the first display frame, brightness compensation is performed on 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 plurality of rows of pixel circuits, and a plurality of partition enable signal lines, the first gate driving circuit includes a plurality of cascaded shift register groups, the shift register group includes k cascaded shift register units, k is an integer greater than or equal to 2, the shift register unit includes 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 partition enable signal lines, different shift register groups are connected to the same k partition enable signal lines, an output end of a first-level 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 area to be compensated is greater than or equal to k*m*n rows;

[0066] Optionally, in the first display frame, the time when the pulse of the signal on the k partition enable signal lines jumps to the enable level is delayed successively; in the second display frame, the signal on the k partition enable signal lines is 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 moment when the pulse of the signal on the k partition enable signal lines jumps to the enable level is related to the position of the dividing line;

[0069] Optionally, the at least two display partitions include an adjacent first display partition and a second display partition, a refresh frequency of the first display partition is lower than a refresh frequency of the second display partition, the area to be compensated includes a first area to be compensated, and a position of the first area to be compensated is related to a position of a 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 end and the first end of the driving unit, and the control end of the threshold compensation unit is electrically connected to the output end 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 is electrically connected to the shift unit, and the output unit includes a first transistor and a second transistor;

[0074] The control end of the first transistor and the control end of the second transistor are both connected to the shift unit, the first end of the first transistor is electrically connected to the partition enable signal line, and the second end of the first transistor is electrically connected to the first end of the second transistor and the output end 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, there is provided a display device, the display device comprising a display panel and a driving module;

[0077] The driving module is used to determine the target driving value of the area to be compensated according to the display data of the area to be compensated when the display panel is a partitioned multi-frequency display; wherein, when the display panel is a partitioned multi-frequency display, the display panel includes at least two display partitions with different refresh frequencies; the position of the area to be compensated is related to the position of the dividing line of the corresponding display partitions with different refresh frequencies.

[0078] Optionally, the display data includes display 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 a first compensation value according to the display grayscale of the sub-pixel in the area to be compensated;

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

[0082] Optionally, the display grayscale includes a first display grayscale and a second display grayscale, the area to be compensated includes a plurality of sub-pixels, and 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 a plurality of rows of sub-pixels;

[0084] The first determination unit is specifically used to determine the first compensation value according to the row number of the sub-pixel in the area to be compensated, the display grayscale and the first compensation table, wherein the first compensation table includes a plurality of rows of first compensation values ​​corresponding to a plurality of display grayscales;

[0085] Optionally, the first compensation values ​​corresponding to each sub-pixel in the i-th row of sub-pixels in the area to be compensated at multiple display grayscales are the first compensation values ​​in the i-th row of the first compensation table; i is an integer greater than or equal to 1;

[0086] Optionally, the first compensation value corresponding to the first display grayscale of the sub-pixel in the Xth row in the area to be compensated is different from the first compensation value corresponding to the first display grayscale of the sub-pixel in the Yth row in the area to be compensated.

[0087] And / or, the first compensation value of the sub-pixel in the Xth row in the area to be compensated corresponding to the second display grayscale is different from the first compensation value of the sub-pixel in the Yth row in the area to be compensated corresponding to the second display grayscale, and X and Y are different positive integers.

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

[0089] Optionally, the area to be compensated includes a plurality of 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 determination unit is used to determine the first compensation value according to the row number of the sub-pixel in the area to be compensated, the display grayscale and the first compensation table, wherein the first compensation table includes a plurality of rows of first compensation values ​​corresponding to a plurality of display grayscales;

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

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

[0094] Optionally, the first compensation value corresponding to the first display grayscale of the sub-pixel in the Xth row in the area to be compensated is different from the first compensation value corresponding to the first display grayscale of the sub-pixel in the Yth row in the area to be compensated.

[0095] and / or, a first compensation value corresponding to the second display grayscale of the sub-pixels in the Xth row in the area to be compensated is different from a first compensation value corresponding to the second display grayscale of the sub-pixels in the Yth row in the area to be compensated, and 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 of at least a part of the sub-pixels in the area to be compensated, a 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] Determine a first compensation value according to the row number of the sub-pixel in the area to be compensated, the display grayscale and a first compensation table, wherein the first compensation table includes a plurality of rows of first compensation values ​​corresponding to a plurality of display grayscales;

[0099] Determining a second compensation value according to a display grayscale and a display brightness level of a sub-pixel in the area to be compensated;

[0100] Determining a target driving value of the area to be compensated according to the first compensation value and the second compensation value; wherein the display panel includes at least two display partitions with different refresh frequencies; and 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 frequencies;

[0101] When the display uniformity of the display panel does not meet the requirements, at one or more display brightness levels and / or one or more display grayscales, 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] According to the brightness difference or the average of the brightness differences between the brightness of 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 is 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] Acquiring the brightness of the area to be compensated when the dividing line is located in the first display sub-area, the second display sub-area, and the third display sub-area of ​​the display panel; wherein the first display sub-area, the second display sub-area, and the third display sub-area are arranged in sequence along the first direction, the first display sub-area and the third display sub-area are located on opposite sides of the center of the display panel along the first direction, the distance between the first display sub-area and the center of the display panel along the first direction is greater than the distance between the second display sub-area and the center of the display panel along the first direction; the distance between the third display sub-area and the center of the display panel along the first direction is greater than the distance between the second display sub-area and the center of the display panel along the first direction;

[0106] The display panel includes data lines extending 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 binding area of ​​the display panel decrease successively, the brightness of the first display sub-area, the second display sub-area and the third display sub-area decreases successively, and the brightness difference between the first display sub-area, the second display sub-area and the third display sub-area and the central brightness of the display panel increases successively.

[0108] Optionally, the first compensation value and / or the second compensation value is corrected 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, including:

[0109] Determining a correction parameter according to 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 obtaining unit and a correction unit;

[0112] The first determination unit is used to determine the first compensation value according to the row number of the sub-pixel in the area to be compensated, the display grayscale and the first compensation table, wherein the first compensation table includes a plurality of rows of first compensation values ​​corresponding to a plurality of display grayscales;

[0113] The second determination unit is used to determine a second compensation value according to the display grayscale and brightness level of the sub-pixels in the area to be compensated;

[0114] The third determination unit is used to determine the target driving value of the area to be compensated according to the first compensation value and the second compensation value; wherein the display panel includes at least two display partitions with different refresh frequencies; 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 frequencies;

[0115] The brightness acquisition unit is used to adjust 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 when the display uniformity of the display panel does not meet the requirements, so as to obtain the brightness of the area to be compensated when the boundary line is located at different positions;

[0116] The correction unit 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.

[0117] The embodiment of the present invention provides a brightness compensation method, a debugging method, a debugging device and a display device for a display panel. The brightness compensation method includes: when the display panel is a partitioned multi-frequency display, determining the target drive value of the area to be compensated according to the display data of the area to be compensated. When the display panel is a partitioned multi-frequency display, the display panel includes at least two display partitions with different refresh frequencies, and 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 frequencies. The area to be compensated can be adjacent to and / or overlap the boundary line, so that the brightness compensation can be performed on the display area related to the position of the boundary line, reducing the brightness difference between the vicinity of the boundary line and most other display areas. Since the display data can reflect the display condition of the sub-pixel of the area to be compensated, the target drive value determined according to the display data is related to the display condition of the sub-pixel, so that the display effect in the area to be compensated can be improved more accurately. Driving the sub-pixel display of the area to be compensated with the target drive value can make the display brightness of the sub-pixel close to the target display brightness, thereby improving the problem of uneven display brightness of the display panel under the partitioned multi-frequency display condition.

[0118] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0119] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

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

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

[0122] Figure 3 It is a waveform diagram of the level change of the partition enable signal when the scanning process enters the display partition with a high refresh rate from the display partition with a low refresh rate;

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

[0124] Figure 5 is a schematic flow chart of another method for compensating brightness of a display panel provided according to an embodiment of the present invention;

[0125] Figure 6 is a schematic flow chart of another method for compensating brightness of a display panel provided according to an embodiment of the present invention;

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

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

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

[0129] Figure 8 A schematic diagram of a partition enabling signal jump in a first display frame and a second display frame provided according to an embodiment of the present invention;

[0130] Fig. 9 is a schematic structural diagram of a shift register provided according to an embodiment of the present invention;

[0131] Fig.10 is a schematic diagram of a relationship between a scan 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; Fig.11 is a schematic diagram of a relationship among a scan signal, a shift signal and a signal on a partition enable signal line in a second display frame provided by an embodiment of the present invention;

[0132] Fig.12 is a schematic structural diagram of a display device provided according to an embodiment of the present invention;

[0133] Fig.13 is a flow chart of a method for debugging a display panel provided according to an embodiment of the present invention;

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

[0135] Fig.15 is a schematic diagram of the brightness of a display panel when a boundary line provided by an embodiment of the present invention is located in the first display sub-area;

[0136] Fig.16 is a schematic diagram of the brightness of a display panel when a boundary line provided by an embodiment of the present invention is located in the third display sub-area;

[0137] Fig.17 It is a structural schematic diagram of a debugging device for a display panel provided according to an embodiment of the present invention. DETAILED DESCRIPTION

[0138] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0139] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0140] In the related art, when the partition refresh function is turned on, when the upper, middle and lower partition frequencies of the display panel are inconsistent, the display panel may have uneven display problems such as dark bands or bright bands in some display areas. For example, Figure 1 is a schematic diagram of a display panel displaying the same grayscale image in the related art, referring to Figure 1 The refresh rates of the upper display area, middle display area and lower display area of ​​the display panel are 1Hz, 120Hz and 1Hz respectively. When entering the 120Hz display partition from 1Hz, the front sub-pixel rows of the high refresh rate display partition appear dark. Figure 2is a schematic diagram of a pixel circuit according to an embodiment of the present invention, with reference to Figure 2 The pixel driving circuit includes a threshold compensation unit 120, the control end of the threshold compensation unit 120 is used to receive the output signal of the first gate driving circuit, and the pulse frequency of the output signal of the first gate driving circuit can be controlled by a partition enable signal. Figure 3 This is a schematic diagram of the level change waveform of the partition enable signal when entering the high refresh frequency display partition from the low refresh frequency display partition. Figure 3 The display panel includes partition enable signal lines, each of which can receive a partition enable signal Vfe output by the chip. After research and analysis by the inventor, the reason why the display partition with high refresh frequency is dark is: during the scanning process of the local refresh frame, when entering the display partition with high refresh frequency (120Hz) from the display partition with low refresh frequency (for example, 1Hz), the partition enable signal Vfe needs to change from low level to high level, which is equivalent to a time period corresponding to the display partition with low refresh frequency (for example, 1Hz) in a local refresh frame. The partition enable signal is at a non-enable level, for example, a low level, so that the first gate drive circuit does not output a conduction pulse to the display partition with low refresh frequency, and continuously outputs the off level of the threshold compensation unit 120. During the scanning period corresponding to the display partition with high refresh frequency (for example, 120Hz), the partition enable signal Vfe is at an enable level, for example, a high level, so that the first gate drive circuit outputs a conduction pulse to the display partition with high refresh frequency, so that the threshold compensation unit 120 is turned on, but the partition enable signal Vfe cannot be directly switched from a low level to a high level, and there is a certain delay ( Figure 3 The rising process of the middle partition enable signal Vfe is a delayed process), which causes the display of the front part of the sub-pixel row of the high refresh frequency display partition to be dark and abnormal. The high voltage of the gate of the transistor in the threshold compensation unit 120 is lower than the subsequent stable state, and the pull-down coupling degree of the transistor in the threshold compensation unit 120 is relatively light, which causes the display of the front part of the sub-pixel row to be dark and abnormal.

[0141] The present embodiment provides a brightness compensation method for a display panel, which can improve the problem of uneven display of the display panel when the display panel displays multi-frequency signals in different zones. Figure 4 is a flow chart of a brightness compensation method for a display panel provided according to an embodiment of the present invention, with reference to Figure 4 The brightness compensation method provided in this embodiment includes the following steps:

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

[0143] Specifically, the display panel partition multi-frequency display means that in the same display screen, at least two display partitions have different refresh frequencies. Before brightness compensation is performed, the brightness of the area to be compensated is different from the brightness of most other display areas. For example, continue to refer to Figure 1 When the refresh rates of the first display partition and the second display partition in the display panel are 1 Hz and 120 Hz respectively, a dark band will appear in the second display area with a refresh rate of 120 Hz, and the dark band here is the area to be compensated. For example, the shift register in the first gate driving circuit connected to the first display partition can be the previous stage of the shift register in the first gate driving circuit connected to the second display partition.

[0144] The area to be compensated may include multiple rows of sub-pixels or at least one row of sub-pixels, and the area to be compensated is a dark band area or a bright band area. The brightness compensation method provided in this embodiment can improve the display problem of bright bands and dark bands when the display panel displays.

[0145] Display data is data related to the display brightness of the sub-pixels in the area to be compensated. The display data may include display grayscales corresponding to multiple sub-pixels in the area to be compensated, and may also include display grayscales corresponding to multiple sub-pixels in the area to be compensated and display brightness levels (Display Brightness Value, DBV) corresponding to multiple sub-pixels. Display devices such as mobile phones and computers usually include brightness adjustment buttons, and users use the brightness adjustment buttons to change the input display brightness level. Under different DBVs, the brightness corresponding to the same grayscale is different. For example, the larger the DBV, the greater the brightness corresponding to the maximum grayscale.

[0146] S120 , determining a target driving value of the area to be compensated according to the display data of the area to be compensated.

[0147] Wherein, when the display panel is a partitioned multi-frequency display, the display panel includes at least two display partitions with different refresh frequencies; 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 frequencies.

[0148] Specifically, the refresh frequencies of the display partitions on both sides of the dividing line are different. For example, the refresh frequency of the display partition on one side of the dividing line may be 1 Hz, 5 Hz, or 10 Hz, etc., and the refresh frequency of the display partition on the other side of the dividing line may be 60 Hz, 90 Hz, or 120 Hz, etc.

[0149] The area to be compensated may be located on at least one side of the dividing line, or may cover the dividing line. In a local refresh frame, the display brightness of the display area adjacent to the dividing line is usually inconsistent with the display brightness of most other display areas. Therefore, it is necessary to perform brightness compensation on the display area adjacent to the dividing line. In this embodiment, the position of the area to be compensated is related to the position of the dividing line. The position of the area to be compensated can be determined based on the position of the dividing line. The area to be compensated can be made adjacent to and / or overlap the dividing line, thereby accurately compensating the display area to be compensated and improving the display effect. For example, the position of the area to be compensated changes with the change of the position of the corresponding dividing line on the display panel, and the relative position of the area to be compensated and the corresponding dividing 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 dividing line remain unchanged.

[0150] Wherein, the target drive value of the area to be compensated includes the target drive value of at least some sub-pixels in the area to be compensated. Before determining the target drive value, each sub-pixel in the area to be compensated has its corresponding original drive data. When the area to be compensated is driven by the original drive data, problems such as dark bands and bright bands will appear. In order to improve the above problems, the present embodiment can first determine the drive compensation value of the sub-pixel in the area to be compensated according to the display data of the area to be compensated, and then determine the target drive value according to the drive compensation value and the original drive data. By driving the sub-pixel display with the target drive value, the difference between the display brightness of the sub-pixel and the target display brightness can be within a set range, thereby improving the display effect of the display panel. For example, the drive compensation value of the target drive value is related to the display data. According to the display data of the area to be compensated, the target drive value of the area to be compensated after the drive compensation value is compensated is determined. The display data may include display grayscale and / or display brightness level.

[0151] The present embodiment provides a brightness compensation method for a display panel, the brightness compensation method comprising: in the case where the display panel is a partitioned multi-frequency display, determining a target drive value of the area to be compensated according to display data of the area to be compensated. In the case where the display panel is a partitioned multi-frequency display, the display panel includes at least two display partitions with different refresh frequencies, and 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 frequencies. The area to be compensated can be adjacent to and / or overlap the boundary line, so that the brightness compensation can be performed on the display area related to the position of the boundary line, reducing the brightness difference between the vicinity of the boundary line and most other display areas. Since the display data can reflect the display condition of the sub-pixel in the area to be compensated, the target drive value determined according to the display data is related to the display condition of the sub-pixel, so that the display effect in the area to be compensated can be improved more accurately. Driving the sub-pixel display of the area to be compensated with the target drive value can make the display brightness of the sub-pixel close to the target display brightness, thereby improving the problem of uneven display brightness of the display panel in the case of partitioned multi-frequency display.

[0152] Optionally, the display data includes display grayscale.

[0153] Specifically, the display grayscale is related to the display brightness, and determining the target drive value according to the display grayscale can make the target drive value more accurate in brightness compensation in the area to be compensated. For example, determining the drive compensation value according to the display grayscale can make the target drive value more accurate in 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 under at least two display grayscales.

[0154] The display grayscale may include all display grayscales in the range of the minimum display grayscale to the maximum display grayscale, such as all display grayscales in the grayscale range of 0 to 255, so that the target drive value corresponding to each display grayscale in the area to be compensated can be accurately determined to improve the compensation effect. The display grayscale may also include part of the display grayscale in the grayscale range of 0 to 255, and the target drive value or drive compensation value of part of the display grayscale is determined, which can reduce the storage space of the display device for storing the target drive value, and the target drive value or drive compensation value corresponding to the remaining display grayscale can be determined by an interpolation algorithm.

[0155] Optional, Figure 5 is a flow chart of another method for compensating brightness of a display panel provided according to an embodiment of the present invention, with reference to Figure 5 The brightness compensation method provided in this embodiment includes the following steps:

[0156] S210 . When the display panel is a partitioned multi-frequency display, determine a first compensation value according to a display grayscale of a sub-pixel in a region to be compensated.

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

[0158] S220: Determine a target driving value of the area to be compensated according to the first compensation value.

[0159] Specifically, the target driving value may be determined only according to the first compensation value. If the sub-pixels in the area to be compensated have original driving data, the target driving value may also be determined 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, the area to be compensated includes a plurality of sub-pixels, and 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 is not equal to the second display grayscale. Before compensation, the actual display brightness of the sub-pixel displaying the first display grayscale is different from the actual display brightness of the sub-pixel displaying the second display grayscale. In this embodiment, different display grayscales are set to correspond to different first compensation values, which can avoid the problem of poor brightness compensation of the display panel caused by the same first compensation values ​​of different display grayscales.

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

[0163] In the above S210, determining the first compensation value according to the display grayscale of the sub-pixel in the area to be compensated includes:

[0164] A first compensation value is determined according to the row number of the sub-pixel in the area to be compensated, the display grayscale and a first compensation table, wherein the first compensation table includes a plurality of rows of first compensation values ​​corresponding to a plurality of 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 at different display grayscales, and may also include the first compensation values ​​of some rows of sub-pixels in the area to be compensated at different display grayscales. Exemplarily, the following Table 1 may be the first compensation table provided by this embodiment, and Table 1 includes the first compensation values ​​of multiple rows of sub-pixels in the area to be compensated at different display grayscales, such as gray01 to gray47. The first compensation value may be a positive value or a negative value. When there is a dark band area in the area to be compensated, the first compensation value may be a negative value.

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

[0167] Table 1

[0168]

[0169]

[0170] The first compensation table includes first compensation values ​​of sub-pixels in different rows in the area to be compensated at different display grayscales. 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, the first compensation value can be determined to be -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 first compensation value of the display grayscale known in the first compensation table and the interpolation algorithm.

[0171] Optionally, the first compensation value corresponding to each sub-pixel in the i-th row of sub-pixels in the area to be compensated in multiple 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, the area to be compensated is located on one side of the dividing line, and the starting row of the area to be compensated can correspond to the starting row in the first compensation table.

[0172] Optionally, the first compensation value of the Xth row of sub-pixels in the area to be compensated corresponding to the first display grayscale is different from the first compensation value of the Yth row of sub-pixels in the area to be compensated corresponding to the first display grayscale, and / or the first compensation value of the Xth row of sub-pixels in the area to be compensated corresponding to the second display grayscale is different from the first compensation value of the Yth row of sub-pixels in the area to be compensated corresponding to the second display grayscale, X and Y are different positive integers, and such a setting indicates that the first compensation values ​​of sub-pixels in different rows at the first display grayscale are different, and the first compensation values ​​of sub-pixels in different rows at the second display grayscale are different. Combined Figure 2 and Figure 3 Since the voltage corresponding to the partition enable signal changes during the process of switching from a low level to a high level, there is a delay and the rising speed is relatively slow. Therefore, during the rising process of the partition enable signal, the voltage of the scanning pulse related to the voltage of the partition enable signal received by the threshold compensation unit 120 of the pixel circuit in the sub-pixels of different rows near the dividing line is different, so that the opening degree of the threshold compensation unit 120 is different, so that the degree to which the data voltage is written to the driving transistor in the pixel circuit of the sub-pixels of different rows is different, and / or the high voltage of the gate of the transistor in the threshold compensation unit 120 is lower than the subsequent stable state to a different extent. Therefore, by setting different first compensation values ​​for sub-pixels of different rows at the same display grayscale, targeted compensation can be performed according to the voltage change of the partition enable signal, thereby 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 number of 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 greater the absolute value of the first compensation value, the greater the degree of brightness compensation of the sub-pixel. Before brightness compensation is performed, the actual display brightness of the sub-pixel under the first display grayscale is darker than the actual display brightness of the sub-pixel under the second display grayscale. In this embodiment, the absolute value of the first compensation value corresponding to the first display grayscale is set to be large, which can improve the brightness compensation effect of the sub-pixel of 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 and low-grayscale scenes, the more obvious the dark band near the dividing line is, the greater the absolute value of the first compensation value is. The greater the absolute value of the driving compensation value, the greater the degree of brightness compensation of the sub-pixel. For low-brightness and low-grayscale scenes, the more obvious the dark band near the dividing line is, the greater the absolute value of the driving compensation value is.

[0175] In other optional embodiments of the present invention, the first display grayscale is smaller than the second display grayscale, and for each sub-pixel of 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 smaller than the absolute value of the first compensation value corresponding to the second display grayscale.

[0176] Optionally, the above S220, determining the target driving value of the area to be compensated according to the first compensation value, includes:

[0177] Determine a driving compensation value corresponding to the sub-pixel according to a first compensation value of the sub-pixel in the area to be compensated;

[0178] The target driving value of the sub-pixel is determined according to 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, the sub-pixels in the area to be compensated will have problems such as dark bands and bright bands only when driven by the original driving value. In order to improve the above problems, the original driving value is compensated by the driving compensation value in this embodiment. For example, the target driving value can be determined according to the sum of the driving compensation value and the original driving value, and then the driving compensation value is increased 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 frequency of the first display partition is less than the refresh frequency of the second display partition, the area to be compensated includes a first area to be compensated, and the position of the first area to be compensated is related to the position of the boundary between the first display partition and the second display partition; at least part of the first area to be compensated is located in the second display partition, and the first area to be compensated is located in at least part of the number of sub-pixels in the second display partition, and at the same display grayscale, the closer the distance between the sub-pixel and the boundary between the first display partition and the second display partition, the greater the absolute value of the first compensation value corresponding to the sub-pixel. The first area to be compensated is located in at least part of the number of sub-pixels in the second display partition, and at the same display grayscale, the closer the distance between the sub-pixel and the boundary between the first display partition and the second display partition, the greater the absolute value of the driving compensation value corresponding to the sub-pixel.

[0181] Specifically, under the same display grayscale, the display condition of the sub-pixel closer to the dividing line is worse. In order to improve the display condition of the sub-pixel closer to the dividing line, the absolute value of the first compensation value of the sub-pixel closer to the dividing line is set to be larger, which can improve the compensation effect and further improve the display effect of the display panel. In the process of switching the partition enable signal Vfe from a low level to a high level, 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 dividing line is lower, and the absolute value of the voltage difference between 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 dividing line and the steady-state voltage is larger, that is, the lower the absolute value of the amplitude of the scan pulse of the sub-pixel closer to the dividing line (equal to the instantaneous voltage of the partition enable signal Vfe), the higher the degree of the high voltage of the gate of the transistor in the threshold compensation unit 120 is lower than the subsequent stable state, so the display condition of the sub-pixel closer to the dividing line is worse, for example, darker, so the absolute value of the first compensation value corresponding to the sub-pixel closer to the dividing line is larger.

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

[0183] Specifically, k1 may be 4096. The first reference voltage and the second reference voltage may be fixed values, and the first compensation value may be obtained by querying the first compensation table. It can be seen that the method for determining the driving compensation value is simple and can be determined quickly, thereby improving the brightness compensation efficiency of the display panel.

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

[0185] Specifically, the target drive value is determined based on the display grayscale and the display brightness level, so that the accuracy of determining the target drive value can be improved, thereby improving the compensation effect of the display area to be compensated, and further improving the display effect of the display panel. For example, the drive compensation value is determined based on the display grayscale and the display brightness level of the area to be compensated. The drive compensation value of the target drive value is related to the display grayscale and the display brightness level. For example, the drive compensation value of the target drive value is different at at least two display grayscales at the same preset display brightness level (for example, the first display brightness level or the second display brightness level). For example, the drive compensation value of the target drive value is different at at least two display brightness levels at the same preset display grayscale (for example, the first display grayscale or the second display grayscale).

[0186] For example, the brightness compensation method provided in this embodiment includes the following steps: when the display panel is a partitioned multi-frequency display, determining a first compensation value according to the display grayscale of the sub-pixels in the area to be compensated; determining a second compensation value according to the display grayscale and display brightness level of the sub-pixels in the area to be compensated; determining a target drive value of the area to be compensated according to 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 is a flow chart of another method for compensating brightness of a display panel provided according to an embodiment of the present invention, with reference to Figure 6 The brightness compensation method provided in this embodiment includes the following steps:

[0189] S310: When the display panel is a partitioned multi-frequency display, determine a first compensation value according to a row number of a sub-pixel in an area to be compensated, a display grayscale, and a first compensation table.

[0190] The first compensation table includes a plurality of rows of first compensation values ​​corresponding to a plurality of display grayscales.

[0191] S320 , determining a second compensation value according to the display grayscale and display brightness level of the sub-pixels in the area to be compensated.

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

[0193] The second compensation value can be determined according to the display grayscale, display brightness level and the second compensation table of the sub-pixel in the area to be compensated. The following Table 2 is a second compensation table, which includes a first register value and a second register value. The first register value can be converted to the display grayscale, and the second register value can be converted to the maximum display brightness in the display brightness level. After determining the display grayscale and the display brightness level, the second compensation value can be determined by looking up the second compensation table. When the corresponding display grayscale and display brightness level are not found in the second compensation table, the second compensation value not in the second compensation table can be determined by using an interpolation algorithm based on the known second compensation values ​​in the second compensation table, such as gain01 to gain55.

[0194] Table 2

[0195]

[0196] S330 : Determine a target driving value of the area to be compensated according to 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, 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, the display brightness level includes a first display brightness level and a second display brightness level, and for each sub-pixel of at least a part 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 is different from the second display brightness level. Before brightness compensation is performed on the sub-pixel, the actual display brightness of the same display grayscale is different at different display brightness levels, and the actual display brightness of different display grayscales at the same display brightness level is different. In this embodiment, the absolute values ​​of the second compensation values ​​corresponding to the same display grayscale at different display brightness levels are set to be different, and the absolute values ​​of the second compensation values ​​corresponding to different display grayscales at the same display brightness level are set to be different. Corresponding compensation can be made according to the actual display brightness, thereby improving the brightness compensation effect of the area to be compensated, and further improving the display effect of the display panel.

[0200] Optionally, the first display grayscale is smaller than the second display grayscale, and for each sub-pixel of at least a portion of the sub-pixels in the area to be compensated, at the same display brightness level (for example, the first display brightness level or the second display brightness level), the absolute value of the second compensation value corresponding to the first display grayscale is greater than the absolute value of the second compensation value corresponding to the second display grayscale.

[0201] Optionally, the first display brightness level is lower than the second display brightness level, the brightness corresponding to the maximum grayscale of the sub-pixel at the first display brightness level is lower than the brightness corresponding to the maximum grayscale at the second display brightness level, and for each sub-pixel of at least a part of the sub-pixels in the area to be compensated, at the same display grayscale (for example, the first display grayscale or the second display grayscale), the absolute value of the second compensation value corresponding to the first display brightness level is greater than the absolute value of the second compensation value corresponding to the second display brightness level.

[0202] Specifically, before brightness compensation is performed, at the same display brightness level, the actual display brightness of the sub-pixel at the first display grayscale is darker than the actual display brightness of the sub-pixel at the second display grayscale. In this embodiment, the absolute value of the first compensation value corresponding to the first display grayscale is set to be large at the same display brightness level, which can improve the brightness compensation effect of the sub-pixel at 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 and low-grayscale scenes, the more obvious the dark band near the boundary line is, the greater the absolute value of the second compensation value is.

[0203] Before brightness compensation is performed, at the same display grayscale, the actual display brightness of the sub-pixel at the first display brightness level is darker than the actual display brightness of the sub-pixel at the second display brightness level. In this embodiment, the absolute value of the first compensation value corresponding to the first display brightness level is set to be large at the same display grayscale, which can improve the brightness compensation effect of the sub-pixel at the first display brightness level and reduce the difference between the brightness of the sub-pixel at the first display brightness level and the brightness of the sub-pixel at the second display brightness level after compensation. For low-brightness and low-grayscale scenes, the more obvious the dark band near the boundary line is, the greater the absolute value of the second compensation value is.

[0204] Optionally, S330, determining a target driving value of the area to be compensated according to the first compensation value and the second compensation value, includes:

[0205] Determine a driving compensation value corresponding to the sub-pixel according to a first compensation value and a second compensation value of the sub-pixel in the area to be compensated;

[0206] The target driving value corresponding to the sub-pixel is determined according to the driving compensation value corresponding to the sub-pixel and the original driving value corresponding to the sub-pixel.

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

[0208] Optionally, determining the driving compensation value corresponding to the sub-pixel in the area to be compensated according to the first compensation value and the second compensation value of the sub-pixel in the area to be compensated includes: determining the driving compensation value of the sub-pixel in the area to be compensated according to 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, the second compensation value can be directly obtained by querying the second compensation value, and the driving compensation value is determined by the product of the first compensation value and the second compensation value, indicating that the method for determining the driving compensation value is simple. It can be seen that the brightness compensation method provided in this embodiment improves the compensation effect while ensuring the compensation accuracy.

[0210] Optionally, 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, V GMP is the first reference voltage, V GSP is the second reference voltage, k1 is the preset register value, and k2 is the set constant.

[0211] Specifically, gain / k2 can be understood as an amplification factor. For example, k2 can be 128. It can be seen from the above formula that the method for determining the driving compensation value is simple.

[0212] Optionally, at least two display partitions include an adjacent first display partition and a second display partition, the refresh frequency of the first display partition is less than the refresh frequency 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 between the first display partition and the second display partition; at least part of the first area to be compensated is located in the second display partition, and the closer the distance between the sub-pixel located in the second display partition and the boundary between the first display partition and the second display partition in the first area to be compensated is, the greater the absolute value of the driving compensation value corresponding to the sub-pixel is. For example, the first area to be compensated includes the first row of sub-pixels in the second display partition that are adjacent to the first display partition.

[0213] In the process of switching the partition enable signal Vfe from a low level to a high level, 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 dividing line is lower, and the absolute value of the voltage difference between 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 dividing line and the steady-state voltage is larger, that is, the lower the absolute value of the amplitude of the scan pulse of the sub-pixel closer to the dividing line (equal to the instantaneous voltage of the partition enable signal Vfe), the greater the degree to which the high voltage of the gate of the transistor in the threshold compensation unit 120 is lower than the subsequent stable state, so the sub-pixel closer to the dividing line has a worse display condition, for example, darker, so the absolute value of the drive compensation value corresponding to the sub-pixel closer to the dividing line is larger, that is, the greater the compensation degree. Figure 2 and Figure 3 , the sub-pixel closer to the dividing line corresponds to the enabling level of the partition enabling signal (for Figure 2 and Figure 3 The lower the voltage (high level), the darker the brightness of the sub-pixel. In this embodiment, the larger the absolute value of the driving compensation value corresponding to the sub-pixel close to the dividing line is set, the better the compensation effect of the sub-pixel close to the dividing line can be, so that the display brightness of sub-pixels in different rows in the area to be compensated is basically the same after brightness compensation, thereby improving the brightness compensation effect of the display panel.

[0214] Optionally, the display panel includes a data line, and in a second display frame (e.g., a full refresh frame), a data voltage transmitted by the data line is written to a sub-pixel of the first display partition, and then, a data voltage transmitted by the data line is written to a sub-pixel of the second display partition. For example, the shift register in the first gate drive circuit that drives the first display partition may be a pre-stage of the shift register in the first gate drive circuit that drives the second display partition. The refresh frequency of the first display partition is lower than the refresh frequency of the second display partition. In the first display frame (e.g., a partial refresh frame), the load of the second display partition is larger than that of the first display partition. At the boundary, the partition enable signal Vfe jumps from the non-enable level to the enable level, and the delay is larger, and the dark band is more obvious. By compensating the data voltage of the sub-pixel of the first area to be compensated located in the second display partition in the first display frame, that is, taking the target drive value as the data voltage, the dark band phenomenon near the boundary between the first display partition and the second display partition can be improved.

[0215] Optionally, the position of the area to be compensated changes with the position of the corresponding dividing line; and / or the area to be compensated is located on one side of the corresponding dividing line, or a part of the area to be compensated is located on one side of the corresponding dividing line, and another part of the area to be compensated is located on the other side of the corresponding dividing line.

[0216] Specifically, the position of the area to be compensated is set to change with the position of the corresponding boundary line, so that the position of the area to be compensated can be flexibly set to improve the brightness compensation effect of the display panel. The area to be compensated after the position change can always be close to the boundary line.

[0217] When the total number of rows of compensating sub-pixels in the first compensation table is fixed, the area to be compensated is set to be located on one side of the dividing line, that is, only the sub-pixels of one display partition are brightness compensated. This allows more rows of sub-pixels in the area to be compensated located on one side of the dividing line to find corresponding first compensation values ​​in the first compensation table, thereby increasing the number of rows of sub-pixels that require brightness compensation in the area to be compensated, thereby improving the brightness compensation effect of the display panel.

[0218] By setting a part of the area to be compensated to be located on one side of the corresponding dividing line, and another part of the area to be compensated to be located on the other side of the corresponding dividing line, brightness compensation can be performed on two display partitions with different refresh frequencies, which can reduce the brightness difference of the display partitions on both sides of the dividing line and improve the brightness compensation effect of the display panel.

[0219] Optionally, the display panel includes a data line; and the brightness compensation method of the display panel further includes: in a first display frame, transmitting a target driving value through the data line.

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

[0221] Optionally, the first display frame is a refresh frame of a part of the display partitions, and the first display frame is a hold frame of another part of the display partitions. The first display frame may be a partial refresh frame.

[0222] Specifically, in the refresh frame, data can be written to the sub-pixel, that is, the gate voltage of the driving transistor will be refreshed. In the hold frame, the data voltage of the previous refresh frame is maintained and no data is written, that is, the gate voltage of the driving transistor will not be refreshed.

[0223] Optional, Figure 7a It is a structural schematic diagram of a display panel provided according to an embodiment of the present invention, wherein a first area to be compensated AA0 is located on one side of a boundary line between a first display partition AA1 and a 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 a first data voltage transmitted by the data line to a sub-pixel Px in the first area to be compensated, and the second display frame is a refresh frame of the first area to be compensated; in a first display frame, writing a target driving value transmitted by the data line as a compensated data voltage to a sub-pixel in the first area to be compensated, and the first display frame is a refresh frame of the first area to be compensated.

[0224] Specifically, the first area to be compensated AA0 is the display area in the second display partition that is closest to the first display partition. Before brightness compensation is performed, the brightness of the first area to be compensated is darker than that of other display areas in the second display partition and / or the first display partition. In the second display frame, because data will be written to both the first display partition and the second display partition, the partition enable signal does not need to jump, and there will be no problem of uneven display. Brightness compensation may not be performed on the sub-pixels in the first area to be compensated. Therefore, the first data voltage may be written to the sub-pixels in the first area to be compensated. In the first display frame, the partition enable signal jumps, and brightness compensation needs to be performed on the sub-pixels in the first area to be compensated, and the target drive value is written into the sub-pixel as the data voltage. For example, the distance and / or relative position between the starting row sub-pixel of the first area to be compensated and the boundary line of the first display partition AA1 and the second display partition AA2 remain unchanged.

[0225] Optional, Figure 7b: is a structural schematic diagram of another display panel provided according to an embodiment of the present invention, the first area to be compensated 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 into the sub-pixel in the first sub-area, and then the third data voltage transmitted by the data line is written into the sub-pixel in the second sub-area, the second display frame is a refresh frame of the first sub-area, and the second display frame is a refresh frame of the second sub-area; in the first display frame, the data line transmits a target drive value corresponding to the sub-pixel in the first sub-area obtained after compensating the second data voltage, and then the data line transmits the target drive value corresponding to the sub-pixel in the second sub-area, and the target drive value transmitted by the data line is written into the sub-pixel in the second sub-area as the data voltage, the first display frame is a hold frame of the first sub-area, and the first display frame is a refresh frame of the second sub-area.

[0226] Specifically, the first sub-area is adjacent to the second sub-area, and the boundary line is located between the first sub-area and the second sub-area. In the second display frame, both the first display sub-area and the second display sub-area are refreshed, so there is no problem of uneven display, and brightness compensation may not be performed on the sub-pixels in the first sub-area and the second sub-area.

[0227] The first display frame is a holding frame of the first sub-area, and in the holding frame, the pixel circuit in the first sub-area does not write the data voltage. There is a coupling capacitor between the data line and the gate of the driving transistor in the pixel circuit. By transmitting the target driving value corresponding to the sub-pixel in the first sub-area obtained after compensating the second data voltage through the data line in the first display frame, the voltage of the gate of the driving transistor of the pixel circuit in the first sub-area is compensated through the coupling effect of the coupling capacitor, thereby realizing the brightness compensation of the sub-pixel in the first sub-area. The second data voltage may be the data voltage corresponding to the sub-pixel in the first sub-area in the second display frame that is located before the first display frame and is closest to the first display frame.

[0228] In the first display frame, the second display partition is refreshed, that is, the pixel circuit in the second display partition will write the data voltage. Therefore, for the second sub-area in the second display partition, according to the original data voltage corresponding to the sub-pixel, the original data voltage is compensated to obtain the target driving value output to the sub-pixel of the second sub-area, and the brightness of the sub-pixel in the second sub-area is compensated to improve the display unevenness phenomenon.

[0229] Optionally, in the second display frame, the data voltage transmitted by the data line is written into the sub-pixels of the first display partition, and then the data voltage transmitted by the data line is written into the sub-pixels of the second display partition.

[0230] Specifically, in the second display frame, the data voltage is written into the sub-pixels of the first display sub-area before the sub-pixels of the second display sub-area, which means that the sub-pixels of the first display sub-area are scanned before the sub-pixels of the second display sub-area.

[0231] In the second display frame, the first area to be compensated and the waiting area to be compensated may not be brightness compensated by the first compensation value, the second compensation value, the driving compensation value, etc. Therefore, in the second display frame, under the same gray scale, the data voltage corresponding to the sub-pixel of the first display partition may 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 is located between the first display partition and the third display partition, the refresh frequency of the third display partition is less than the refresh frequency of the second display partition, and in the second display frame, data voltages are written to sub-pixels of the second display partition, and thereafter, data voltages are written to sub-pixels of the third display partition.

[0233] For example, the shift register in the first gate driving circuit driving the second display partition can be the predecessor of the shift register in the first gate driving circuit driving the third display partition. For example, the shift register in the first gate driving circuit connected to the second display partition can be the predecessor of the shift register in the first gate driving circuit connected to the third display partition.

[0234] The area to be compensated includes a second area to be compensated AA03, and the position of the second area to be compensated is related to the position of the boundary line between the third display partition and the second display partition; or, the area to be compensated is not related to the position of the boundary line between the third display partition and the second display partition, that is, the second area to be compensated AA03 can be set or not set. The second area to be compensated AA03 can be located on one side of the boundary line between the third display partition and the second display partition, for example, in the second display partition. Alternatively, a portion of the second area to be compensated AA03 can be located on one side of the boundary line between the third display partition and the second display partition, and another portion of the second area to be compensated AA03 can be located on the other side of the boundary line between the third display partition and the second display partition.

[0235] Specifically, in the second display frame, the data voltage is written into the sub-pixels of the second display sub-area before the sub-pixels of the third display sub-area, which means that the sub-pixels of the second display sub-area are scanned before the sub-pixels of the third display sub-area.

[0236] The second area to be compensated may be located in the second display partition and adjacent to the boundary between the second display partition and the third display partition. The second area to be compensated may also be located in the third display partition and adjacent to the boundary between the second display partition and the third display partition. The second area to be compensated may also cover the boundary between the second display partition and the third display partition, that is, part of the second area to be compensated is located in the second display partition, and another part of the second area to be compensated is located in the third display partition.

[0237] The area to be compensated is not related to the position of the boundary between the third display partition and the second display partition, which means that in the second display frame (such as a local refresh frame), when the scanning process enters the display partition with a high refresh rate from the display partition with a low refresh rate, brightness compensation may not be performed.

[0238] Optionally, in the first display frame, brightness compensation is performed on 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 partitions, 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 line extends along the first direction Y. The first direction Y may be parallel to a column direction in which sub-pixels (or pixel circuits) are arranged.

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

[0242] Figure 7c is a schematic diagram of the structure of another display panel provided according to an embodiment of the present invention, referring to Figure 7c Optionally, the display panel includes a first gate driving circuit, multiple rows of pixel circuits 1113, and multiple partition enable signal lines, the first gate driving circuit includes multiple cascaded shift register groups 10, the shift register group 10 includes k cascaded shift register units 11, k is an integer greater than or equal to 2, the shift register unit 11 includes m shift registers 111, 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 end of the first-stage shift register 111 is electrically connected to n rows of pixel circuits 1113 through a scan line 1112, n is an integer greater than or equal to 1, and the number of rows of 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 the pixel circuits 1113 in the first area to be compensated AA0 is greater than or equal to k*m*n rows. For example, the number of rows of the pixel circuits 1113 in the second sub-area AA02 in the first area to be compensated AA0 is greater than or equal to k*m*n rows. For example, the number of rows of the pixel circuits 1113 in the second area to be compensated AA03 is greater than or equal to k*m*n rows.

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

[0245] The scan line 1112 extends along a second direction X. The second direction X intersects with, for example, is perpendicular to, the first direction Y in which the data line Data extends. The second direction X may be parallel to the row direction of the sub-pixel (or pixel circuit) array. Multiple data lines Data may be arranged along the second direction. Multiple scan lines 1112 may be arranged along the first direction. Figure 7c Schematically shows the case where k=4. For example, m may be 16, and n may be 1. Each shift register group 10 may control the display conditions of k*m*n rows of pixel circuits 1113 . Figure 7c The shift register group 10 of the first gate drive circuit in the display panel shown can be regarded 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 four partition enable signal lines is one cycle. For example, continue to refer to Figure 7c , Figure 7c Schematically shows 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 refresh frequencies of the first display partition AA1 and the third display partition AA3 are low refresh frequencies, and the refresh frequency of the second display partition AA2 is high refresh frequency, Figure 7cThe left side in the middle shows the timing of the partition enable signal in the first display frame (the refresh frame of the second display partition AA2, the hold frame of the first display partition AA1 and the third display partition AA3). In the scanning stage of the first display partition AA1 and the third display partition AA3, the partition enable signal on the partition enable signal line is a non-enable level, such as a low level. In the scanning stage of the second display partition AA2, the partition enable signal on the partition enable signal line is an enable level, such as a high level. At the moment when the partition enable signal on the partition enable signal line VFE1 jumps from a non-enable level (such as a low level) to an enable level (such as a high level), the pixel circuit of the starting row in the second display partition AA2 starts to refresh data; at the moment when the partition enable signal on the partition enable signal line VFE4 jumps from an enable level (such as a high level) to a non-enable level (such as a low level), the pixel circuit of the ending row in the second display partition AA2 completes data refresh.

[0246] Optional, Figure 8 According to the schematic diagram of the partition enabling signal jump in the first display frame and the second display frame provided by the embodiment of the present invention, refer to Figure 8 , in the first display frame F1, the moment when the pulse of the signal on the k partition enable signal lines jumps to the enable level (for example, a high level) is delayed in sequence; in the second display frame F2, the signal on the k partition enable signal lines is at the enable level. For example, in the first display frame F1, the time periods during which the signals on the k partition enable signal lines are at the enable level overlap. For example, in the first display frame F1, the duration of the time periods during which the signals on the k partition enable signal lines are at the enable level is equal. For example, in the first display frame, the moment when the pulse of the signal on the k partition enable signal lines jumps to the enable level (for example, a high level) is delayed in sequence, and the number of delayed rows is the scanning time of the m*n rows of pixel circuits. For example, the pulse jump moments of the signals on the sequentially adjacent partition enable signal lines are separated by the scanning time of the m*n rows of pixel circuits.

[0247] Specifically, the first display frame F1 is a refresh frame for at least one display partition, and is a hold frame for at least one display partition. In this case, the moment when the pulse of the signal on the k partition enable signal lines jumps to the enable level is delayed in sequence, so as to facilitate the completion of partition multi-frequency control. The second display frame F2 is a refresh frame for each display partition. In the second display frame F2, the signals on the k partition enable signal lines are at the enable level, which can ensure that each display partition can be refreshed in the second display frame F2, and the signals on the partition enable signal lines do not need to jump. Figure 7c As an example, the display panel structure shown in FIG. Figure 7c and Figure 8, in the second display frame F2, the signals on the k partition enable signal lines are at the enable level, and the first display partition AA1, the second display partition AA2 and the third display partition AA3 are refreshed in the scanning order. In the first display frame F1, the partition enable signal received by the shift register connected to the pixel circuit in the first display partition AA1 in the time period corresponding to the first display partition AA1 is low level, and the partition enable signal received by the shift register connected to the pixel circuit in the third display partition AA3 in the time period corresponding to the third display partition AA3 is low level, and the pixel circuits in the first display partition AA1 and the third display partition AA3 work in the hold frame. In the second display frame F2, the partition enable signal received by the shift register connected to the pixel circuit in the second display partition AA2 in the time period corresponding to the second display partition AA2 is low level, and the first display partition AA2 works in the refresh frame.

[0248] One or more first display frames may be arranged between adjacent second display frames. The more first display frames arranged between adjacent second display frames, the lower the refresh frequency 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 to the k partition enable signal lines are arranged periodically. Exemplarily, the number of sub-pixel rows connected to the first partition enable signal line VFE1 is 1 to 16 rows, 65 to 80 rows... The number of sub-pixel rows connected to the second partition enable signal line VFE2 is 17 to 32 rows, 81 to 96 rows... The number of sub-pixel rows connected to the third partition enable signal line VFE3 is 33 to 48 rows, 97 to 112 rows... The number of sub-pixel rows connected to the fourth partition enable signal line VFE4 is 49 to 64 rows, 98 to 128 rows...

[0251] Optionally, in the first display frame, the time when the pulse of the signal on the k partition enable signal lines jumps to the enable level is related to the position of the dividing line.

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

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

[0254] Specifically, when the signals on the k partition enable signal lines are all changed to the enable level, there are k*m*n rows of pixel circuits that are lit. During the time period when the k*m*n rows of pixel circuits are lit, the enable levels of the signals on the k partition enable signal lines do not meet the requirements (for example, Figure 2 When the enable level shown is a high level, during the process of switching from a low level to a high level, there is a situation where the high level of the signal on the partition enable signal line cannot reach the required amplitude). This situation will cause the brightness of the k*m*n row pixel circuit to be different from the brightness of other display areas. Therefore, setting at least k*m*n rows of 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 end of the first-stage shift register (e.g., each stage of the shift register, or each stage of the shift register in at least a portion of the shift registers) is connected to at least two rows of pixel circuits. The first-stage shift register can drive at least two rows of pixel circuits. The sub-pixel may include a pixel circuit and a light-emitting unit. The pixel circuit may be connected to the light-emitting unit.

[0257] Optional, continue to refer to Figure 2 and Fig. 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 end and the first end of the driving unit 110, and the control end SN2 of the threshold compensation unit 120 is electrically connected to the output end GOUT of the shift register in the first gate driving circuit. Specifically, the threshold compensation unit 120 is used to perform data voltage compensation on 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, and the gate of the fourth transistor T4 is electrically connected to the output end GOUT of the shift register as the control end SN2 of the threshold compensation unit 120. The pixel circuit may also include a data writing unit 140, and the data writing unit 140 is connected between the data line Data and the second end of the driving unit 110. For example, the data writing unit includes a fifth transistor T5.

[0258] The pixel circuit may further include part or all of an initialization unit, a light emitting control unit, and a 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. A first end of the fifth transistor T5 is connected to the data line Data, a second end of the fifth transistor T5 is connected to the second end of the driving transistor T3 (which can be used as the second end of the driving unit), and a control end 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, and the control end of the seventh transistor T7 and the control end of the eighth transistor T8 are connected to the light emitting control line EM. Two ends of the storage capacitor Cst are respectively connected to the control end of the driving module 110 and the power line ELVDD. The sixth transistor T6 and the fourth transistor T4 are connected in series between the first signal line Vrefn1 and the control end of the driving module 110. The control end of the fourth transistor T4 is electrically connected to the output end of the shift register in the first gate driving circuit as the control end of the threshold compensation unit 120. The control end of the sixth transistor T6 is connected to the third scan line SN1. The second end of the ninth transistor T9 is connected to the second signal line Vrefp, the control end of the ninth transistor T9 is connected to the second scan line SP2, the second end of the tenth transistor T10 is connected to the third signal line Vrefn2, and the control end of the tenth transistor T10 is connected to the second scan line SP2. The first end of the ninth transistor T9 can be connected to the first end or the second end of the driving transistor. The first end of the tenth transistor T10 is connected to the first end of the light emitting unit.

[0259] Optionally, in the first initialization stage, the initialization unit and the threshold compensation unit 120 are turned on to initialize the driving transistor. In the data writing stage, the data writing unit and the threshold compensation unit 120 are turned on to write the voltage obtained by 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 stage (for example, overlapping or staggered with the first initialization stage or the data writing stage), the reset unit is turned on to reset the first end of the light-emitting unit 130 and / or the first end or the second end of the driving transistor. In the light-emitting stage, the seventh transistor T7 and the eighth transistor T8 are turned on, and the light-emitting unit 130 emits light.

[0260] The refresh frame may include a first initialization phase, a data writing phase, a second initialization phase, and a light emitting phase. The hold frame may include a second initialization phase and a light emitting phase. The hold frame may not include the first initialization phase and the data writing phase. Optionally, the sixth transistor T6 may be connected between the first signal line Vrefn1 and the control end of the driving module 110. The fourth transistor T4 may be connected between the second end of the driving module 110 and the control end of the driving module 110.

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

[0262] Specifically, the N-type transistor is turned on at a high level, and when the enable level is a high level, the output terminal of the shift register outputs a high level, thereby turning on the threshold compensation unit.

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

[0264] Optional, Fig. 9 is a schematic diagram of a structure of a shift register provided according to an embodiment of the present invention, with reference to Fig. 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, and the output unit 220 includes a first transistor T21 and a second transistor T2; the control end of the first transistor T1 and the control end of the second transistor T2 are both connected to the shift unit 210, the first end of the first transistor T1 is electrically connected to the partition enable signal line VFE (for example, one of VFE1 to VFE4), the second end of the first transistor T1 is electrically connected to the first end of the second transistor T2 and the output end GOUT of the shift register; the second end of the second transistor T2 is electrically connected to the first power 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 non-enable level, such as a low level, the voltage acting on the N-type transistor in the threshold compensation unit 120 is always a low level, the N-type transistor is always turned 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 (for example, one of VFE1 to VFE4) is an enable 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, and the N-type transistor is turned on to charge the storage capacitor Cst in the pixel circuit.

[0266] The shift unit 210 includes an output subunit and a control subunit, and the output subunit may include an eleventh transistor T11 and a twelfth transistor T12. The control subunit may include part or all of the thirteenth transistor T13 to the twenty-third transistor T23, the first capacitor C1, the second capacitor C2 and the third capacitor C3, wherein the first end of the eighteenth transistor T18, the control end of the seventeenth transistor T17, the control end of the sixteenth transistor T16 and the control end of the thirteenth transistor T13 are all connected to the first power signal line NVGL, the control end of the eighteenth transistor T18 and the control end of the twentieth transistor T20 are all connected to the first clock signal terminal SCK1, the first end of the fifteenth transistor T15, the control end of the fourteenth transistor T14, the control end of the twenty-second transistor T22 and the first end of the second capacitor C2 are all connected to the second clock signal terminal SCK2, the first end of the twenty-first transistor T21 and the first end of the twenty-third transistor T23 are all connected to the fourth power line NVGH, the first end of the twentieth transistor T20 is connected to the start signal line SIN, the first end of the eleventh transistor T11 is connected to the fourth power line NVGH, the second end of the eleventh transistor T11 outputs the shift signal SOUT, and the first end 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] Fig.10 is a schematic diagram of a relationship among a scan 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, Fig.11 is a schematic diagram of the relationship between a scan 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, with reference to Figure 7c , Figure 9-11 , Fig.10 and Fig.11The case where k=4 and m=4 is schematically shown in the figure. The display panel may include 3n shift registers, and the first display partition AA1, the second display partition AA2 and the third display partition AA3 are respectively connected to n shift registers, wherein SOUT1-SOUTn are respectively shift signals output by the shift units in the first n-stage shift registers corresponding to the first display partition AA1; SOUTn+1-SOUT2n are respectively shift signals output by the shift units in the n+1-stage shift register to the 2n-stage shift register corresponding to the second display partition AA2; SOUT2n+1-SOUT3n are respectively shift signals output by the shift units in the 2n+1-stage shift register to the 3n-stage shift register corresponding to the third display partition AA3. GOUT1-GOUTn are the scanning signals output from the first n shift registers corresponding to the first display partition AA1; GOUTn+1-GOUT2n are the scanning signals output from the n+1th shift register to the 2nth shift register corresponding to the second display partition AA2; GOUT2n+1-GOUT3n are the scanning signals output from the 2n+1th shift register to the 3nth shift register corresponding to the third display partition AA3.

[0269] refer to Fig.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 non-enable levels, such as low level VL, and the output terminal GOUT of the shift register outputs a non-enable 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 output terminal GOUT of the corresponding shift register. The refresh frequency of the second display partition AA2 is a high refresh frequency, the partition enable signal on the partition enable signal line (for example, VFE1 to VFE4) is an enable level VH, and the moment when the pulse of the signal on the four partition enable signal lines jumps to the enable level is delayed in sequence. For example, within the delay time of the partition enable signal line VFE2 compared to the enable level of the partition enable signal line VFE1, GOUTn+1 to GOUTn+4 are enable level pulses (i.e., the conduction pulses of the threshold compensation unit) in sequence; within the delay time of the partition enable signal line VFE3 compared to the enable level of the partition enable signal line VFE2, GOUTn+5 to GOUTn+8 are enable level pulses in sequence; within the delay time of the partition enable signal line VFE4 compared to the enable level of the partition enable signal line VFE3, GOUTn+9 to GOUTn+12 are enable level pulses in sequence. The second display partition AA2 can receive the enable level pulse output by the output terminal GOUT of the corresponding shift register.

[0270] refer to Fig.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 pulse outputted by the output terminal GOUT of the corresponding shift register, 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 enable level VH. The scan signal outputted by the shift register, that is, the signal outputted by the output terminal of the output unit 220 is the same as the shift signal outputted by the output terminal of the shift unit 210.

[0271] Fig.12 is a schematic diagram of a display device according to an embodiment of the present invention, referring to Fig.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 according to the display data of the area to be compensated when the display panel 100 is a partitioned multi-frequency display; wherein, when the display panel 100 is a partitioned multi-frequency display, the display panel 100 includes at least two display partitions with different refresh frequencies; 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 frequencies.

[0272] An embodiment of the present invention provides a display device, which includes a display panel and a driving module, wherein the driving module is used to determine a target driving value of the area to be compensated according to display data of the area to be compensated when the display panel is a partitioned multi-frequency display. When the display panel is a partitioned multi-frequency display, the display panel includes at least two display partitions with different refresh frequencies, and 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 frequencies. The area to be compensated can be adjacent to or overlap the boundary line, so that brightness compensation can be performed on the display area that requires brightness compensation, thereby improving the brightness compensation effect of the display panel. Since the display data can reflect the display condition of the sub-pixel in the area to be compensated, the target driving value determined according to the display data is related to the display condition of the sub-pixel, so that the display effect in the area to be compensated can be improved more accurately. By driving the sub-pixel display of the area to be compensated with the target driving value, the display brightness of the sub-pixel can be close to the target display brightness, thereby improving the problem of uneven display brightness of the display panel in the case of partitioned multi-frequency display.

[0273] Optionally, the driving module 200 may be a chip.

[0274] Optionally, the display data includes display grayscale.

[0275] Optionally, the driving module includes a first determination unit and a second determination unit; the first determination unit is used to determine a first compensation value according to a display grayscale of a sub-pixel in the area to be compensated; and the second determination unit is used to determine a target driving value of the area to be compensated according to the first compensation value.

[0276] Optionally, the display grayscale includes a first display grayscale and a second display grayscale, the area to be compensated includes a plurality of sub-pixels, and 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 determination unit is specifically used to determine the first compensation value according to the row number of the sub-pixels in the area to be compensated, the display grayscale and the first compensation table, wherein the first compensation table includes multiple rows of first compensation values ​​corresponding to multiple display grayscales.

[0278] Optionally, the first compensation value corresponding to each sub-pixel in the i-th row of sub-pixels in the area to be compensated at multiple display grayscales is the first compensation value in 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 first display grayscale of the sub-pixel in the Xth row in the area to be compensated is different from the first compensation value corresponding to the first display grayscale of the sub-pixel in the Yth row in the area to be compensated.

[0280] And / or, the first compensation value of the sub-pixel in the Xth row in the area to be compensated corresponding to the second display grayscale is different from the first compensation value of the sub-pixel in the Yth row in the area to be compensated corresponding to the second display grayscale, and X and Y are different positive integers.

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

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

[0283] The driving module includes a first determination unit, a second determination unit and a third determination unit; the first determination unit is used to determine a first compensation value according to a row number of sub-pixels in the area to be compensated, a display grayscale and a first compensation table, wherein the first compensation table includes a plurality of rows of first compensation values ​​corresponding to a plurality of display grayscales; the second determination unit is used to determine a second compensation value according to the display grayscale and display brightness level of the sub-pixels in the area to be compensated; the third determination unit is used to determine a target driving value of the area to be compensated according to the first compensation value and the second compensation value.

[0284] Optionally, the first compensation value corresponding to the first display grayscale of the X-th row of sub-pixels in the area to be compensated is different from the first compensation value corresponding to the first display grayscale of the Y-th row of sub-pixels in the area to be compensated, and / or the first compensation value corresponding to the second display grayscale of the X-th row of sub-pixels in the area to be compensated is different from the first compensation value corresponding to the second display grayscale of the Y-th row of sub-pixels in the area to be compensated, and 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 of at least a part of the sub-pixels in the area to be compensated, a 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 as the brightness compensation method of the display panel provided in any embodiment of the present invention. For technical details not detailed in this embodiment, please refer to 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] Fig.13 is a flow chart of a method for debugging a display panel according to an embodiment of the present invention, with reference to Fig.13 The debugging method provided in this embodiment includes the following steps:

[0288] S410, determining a first compensation value according to a row number of sub-pixels in the area to be compensated, a display grayscale, and a first compensation table, wherein the first compensation table includes a plurality of rows of first compensation values ​​corresponding to a plurality of display grayscales.

[0289] S420: Determine a second compensation value according to the display grayscale and display brightness level of the sub-pixels in the area to be compensated.

[0290] S430: Determine a target driving value of the area to be compensated according to the first compensation value and the second compensation value.

[0291] The display panel includes at least two display partitions with different refresh frequencies; 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 frequencies.

[0292] It should be noted that the relevant contents of steps S410 to S430 can be found in the description of the brightness compensation method of the display panel, which will not be repeated here. The target driving values ​​determined in steps S410 to S430 can be applicable to a variety of display panels.

[0293] S440. When the display uniformity of the display panel does not meet the requirements, at one or more display brightness levels and / or one or more display grayscales, for the same display brightness level and display grayscale, 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 to display with the target driving value, and the display uniformity of the display panel is detected to see whether it meets the requirements. If it does not meet the requirements, step S440 is executed. The display panel can be controlled to display a 30nit32 grayscale image and a 2nit32 grayscale image, and then the position of the dividing line is adjusted, and the brightness of the area to be compensated after the dividing line is adjusted is obtained.

[0295] S450, correcting the first compensation value and / or the second compensation value according to the brightness difference or the average of the brightness differences 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.

[0296] Specifically, each time the position of the dividing line changes, the brightness of the area to be compensated and the brightness of the reference brightness are obtained, and 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 according to 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 according to the average of the brightness differences of the number of times the dividing line changes.

[0297] An embodiment of the present invention provides a debugging method for a display panel, the debugging method comprising: first determining a first compensation value according to the row number of sub-pixels in the area to be compensated, display grayscale and a first compensation table, then determining a second compensation value according to the display grayscale and display brightness level of the sub-pixels in the area to be compensated, and then determining a target drive value of the area to be compensated according to the first compensation value and the second compensation value. After the sub-pixels are driven to display with the target drive value, when the display uniformity of the display panel does not meet the requirements, the display panel is controlled to display and adjust the position of the dividing line multiple times under one or more display brightness levels and / or one or more display grayscales to obtain the brightness of the area to be compensated when the dividing line is located at different positions. Then, the first compensation value and / or the second compensation value are corrected according to 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, and can achieve the effect of piece-by-piece adjustment, 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 in sequence 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 data lines, and the data lines extend along the first direction Y.

[0301] Specifically, the center of the display panel may be located in the second display sub-area AA21 , and the center of the second display sub-area AA21 may coincide with the center of the display panel. Fig.14 is a schematic diagram of the brightness of a display panel when a dividing line is located in the second display sub-area provided by an embodiment of the present invention, Fig.15 is a schematic diagram of the brightness of a display panel when a boundary line provided by an embodiment of the present invention is located in the first display sub-area, Fig.16 is a schematic diagram of the brightness of the display panel when a dividing line provided by an embodiment of the present invention is located in the third display sub-area, with reference to Figure 14-16 , the center brightness of the display panel may be the average brightness of the center 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, when the position of the dividing line is different, the display brightness of the area to be compensated will be 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, so that the display brightness of the display panel can be more uniform 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, which reduces the storage space of the chip occupied.

[0302] Optionally, the distances between the first display sub-area, the second display sub-area and the third display sub-area and the chip binding area of ​​the display panel decrease successively, the brightness of the first display sub-area, the second display sub-area and the third display sub-area decreases successively, and the brightness difference between the first display sub-area, the second display sub-area and the third display sub-area and the central brightness of the display panel increases successively.

[0303] Optionally, the first compensation value and / or the second compensation value is corrected according to the brightness difference or the average of the brightness differences 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 a correction parameter according to the brightness difference or the average of the brightness difference; and taking the product of the second compensation value and the correction parameter as the corrected second compensation value.

[0304] Specifically, different brightness differences or average values ​​of brightness differences correspond to different correction parameters.

[0305] Fig.17 is a schematic diagram of a display panel debugging device according to an embodiment of the present invention, referring to Fig.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 obtaining unit 540 and a correcting unit 550; the first determining unit 510 is used to determine a first compensation value according to a row number of sub-pixels in the area to be compensated, a display grayscale and a first compensation table, wherein the first compensation table includes a plurality of rows of first compensation values ​​corresponding to a plurality of display grayscales; the second determining unit 520 is used to determine a second compensation value according to 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 of the area to be compensated according to the first compensation value and the second compensation value; wherein the display panel includes a refresh rate at least two display partitions with different refresh rates; the position of the area to be compensated is related to the position of the dividing line of the corresponding display partitions with different refresh rates; the brightness acquisition unit 540 is used to adjust the position of the dividing line for the same display brightness level and display gray scale at one or more display brightness levels and / or one or more display gray scales when the display uniformity of the display panel does not meet the requirements, so as to obtain the brightness of the area to be compensated when the dividing 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 dividing line is located at different positions, until the display uniformity of the display panel meets the requirements.

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

[0307] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0308] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A brightness compensation method for a display panel, characterized in that: include: In the case where the display panel is a partitioned multi-frequency display, the target driving value of the area to be compensated is determined based on the display data of the area to be compensated; wherein, in the case where the display panel is a partitioned multi-frequency display, the display panel includes at least two display partitions with different refresh frequencies; the position of the area to be compensated is related to the position of the dividing line of the display partitions with different refresh frequencies.

2. The brightness compensation method of a display panel according to claim 1, characterized in that: The display data includes display grayscale; Preferably, determining the target driving value of the area to be compensated according to the display data of the area to be compensated includes: Determining a first compensation value according to the displayed grayscale of the sub-pixels in the area to be compensated; determining a target driving value of the area to be compensated according to the first compensation value; Preferably, the display grayscale includes a first display grayscale and a second display grayscale, the area to be compensated includes a plurality of sub-pixels, and each sub-pixel in at least a portion of the sub-pixels in the area to be compensated has a different first compensation value corresponding to the first display grayscale and the second display grayscale.

3. The brightness compensation method of a display panel according to claim 2, characterized in that: The area to be compensated includes a plurality of rows of sub-pixels; Determining a first compensation value according to a display grayscale of a sub-pixel in the area to be compensated includes: Determine the first compensation value according to the row number of the sub-pixel in the area to be compensated, the display grayscale and a first compensation table, wherein the first compensation table includes a plurality of rows of first compensation values ​​corresponding to a plurality of display grayscales; Preferably, the first compensation values ​​corresponding to each sub-pixel in the i-th row of sub-pixels in the area to be compensated at multiple display grayscales are the first compensation values ​​in the i-th row of the first compensation table; i is an integer greater than or equal to 1; Preferably, the first compensation value corresponding to the first display grayscale of the X-th row of sub-pixels in the area to be compensated is different from the first compensation value corresponding to the first display grayscale of the Y-th row of sub-pixels in the area to be compensated. and / or, a first compensation value corresponding to the second display grayscale of the sub-pixels in the X-th row in the area to be compensated is different from a first compensation value corresponding to the second display grayscale of the sub-pixels in the Y-th row in the area to be compensated, and X and Y are different positive integers; Preferably, the first display grayscale is smaller than the second display grayscale, and for each sub-pixel of 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.

4. The brightness compensation method of a display panel according to claim 3, characterized in that: Determining the target driving value of the area to be compensated according to the first compensation value includes: Determine a driving compensation value corresponding to the sub-pixel according to a first compensation value of the sub-pixel in the area to be compensated; Determining a target driving value of the sub-pixel according to the driving compensation value and an original driving value of the sub-pixel; wherein the original driving value is related to a display grayscale of the sub-pixel; Preferably, at least two of the display partitions include an adjacent first display partition and a second display partition, a refresh frequency of the first display partition is lower than a refresh frequency of the second display partition, the area to be compensated includes a first area to be compensated, and a position of the first area to be compensated is related to a position of a boundary line between the first display partition and the second display partition; at least a portion of the first area to be compensated is located in the second display partition, and the first area to be compensated is located in at least a portion of sub-pixels in the second display partition, and at the same display grayscale, the closer the distance between the sub-pixel and the boundary line between the first display partition and the second display partition, the greater the absolute value of the first compensation value corresponding to the sub-pixel; Preferably, ΔV=gray*(V GMP -V GSP ) / k1; Wherein, ΔV is the driving compensation value, gray is the first compensation value, V GMP is the first reference voltage, V GSP is the second reference voltage, and k1 is the preset register value.

5. The brightness compensation method of a display panel according to claim 1, characterized in that: The display data includes a display grayscale and a display brightness level; Preferably, the area to be compensated includes a plurality of rows of sub-pixels; Determining a target driving value of the area to be compensated according to the display data of the area to be compensated includes: Determine a first compensation value according to the row number of the sub-pixel in the area to be compensated, the display grayscale and a first compensation table, wherein the first compensation table includes a plurality of rows of first compensation values ​​corresponding to a plurality of display grayscales; Determining a second compensation value according to a display grayscale and a display brightness level of a sub-pixel in the area to be compensated; determining a target driving value of the area to be compensated according to the first compensation value and the second compensation value; Preferably, the first compensation value corresponding to the first display grayscale of the X-th row of sub-pixels in the area to be compensated is different from the first compensation value corresponding to the first display grayscale of the Y-th row of sub-pixels in the area to be compensated. and / or, a first compensation value corresponding to the second display grayscale of the sub-pixels in the X-th row in the area to be compensated is different from a first compensation value corresponding to the second display grayscale of the sub-pixels in the Y-th row in the area to be compensated, and X and Y are different positive integers; Preferably, 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 of at least a part of the number of 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; Preferably, the first display grayscale is smaller than the second display grayscale, and for each sub-pixel of at least a portion of the sub-pixels in the area to be compensated, at the same display brightness level, an absolute value of the second compensation value corresponding to the first display grayscale is greater than an absolute value of the second compensation value corresponding to the second display grayscale; the first display brightness level is smaller than the second display brightness level, and the brightness corresponding to the maximum grayscale of the sub-pixel at the first display brightness level is less than the brightness corresponding to the maximum grayscale at the second display brightness level, and for each sub-pixel of at least a portion of the sub-pixels in the area to be compensated, at the same display grayscale, an absolute value of the second compensation value corresponding to the first display brightness level is greater than an absolute value of the second compensation value corresponding to the second display brightness level.

6. The brightness compensation method of a display panel according to claim 5, characterized in that: The step of determining the target driving value of the area to be compensated 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 area to be compensated; 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; Preferably, determining the 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 area to be compensated includes: determining a driving compensation value of a sub-pixel in the area to be compensated according to a product of the first compensation value and the second compensation value; Preferably, ΔV = gray*gain*(V GMP -V GSP ) / k1; ΔV=gray*(gain / k2)*(V GMP -V GSP ) / k1; Wherein, ΔV is the driving compensation value, gray is the first compensation value, gain is the second compensation value, V GMP is the first reference voltage, V GSP is the second reference voltage, k1 is the preset register value, and k2 is a set constant; Preferably, at least two of the display partitions include an adjacent first display partition and a second display partition, a refresh frequency of the first display partition is lower than a refresh frequency of the second display partition, the area to be compensated includes a first area to be compensated, and a position of the first area to be compensated is related to a position of a 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 distance between the sub-pixel in the first area to be compensated and the second display partition is to the boundary line between the first display partition and the second display partition, the greater the absolute value of the driving compensation value corresponding to the sub-pixel is; The display panel includes a data line, In the second display frame, the data voltage transmitted by the data line is written into the sub-pixels of the first display partition, and then the data voltage transmitted by the data line is written into the sub-pixels of the second display partition.

7. The brightness compensation method of a display panel according to claim 1, characterized in that: The position of the area to be compensated changes with the position of the corresponding dividing line; And / or, the area to be compensated is located on one side of the corresponding dividing line, or a part of the area to be compensated is located on one side of the corresponding dividing line, and another part of the area to be compensated is located on the other side of the corresponding dividing line.

8. The brightness compensation method of a display panel according to claim 1, characterized in that: The display panel includes a data line, The method further comprises: In a first display frame, transmitting the target drive value via a data line; Preferably, the first display frame is a refresh frame of a part of the display partitions, and the first display frame is a hold frame of another part of the display partitions.

9. The brightness compensation method of a display panel according to claim 1, characterized in that: At least two of the display partitions include a first display partition and a second display partition that are adjacent to each other, a refresh frequency of the first display partition is lower than a refresh frequency of the second display partition, the area to be compensated includes a first area to be compensated, and a position of the first area to be compensated is related to a position of a boundary line between the first display partition and the second display partition; The first area to be compensated is located on one side of a boundary line between the first display subarea and the second display subarea, and the first area to be compensated is located in the second display subarea; The display panel includes a data line, The method further comprises: In a second display frame, writing the first data voltage transmitted by the data line into the sub-pixels in the first area to be compensated, the second display frame being a refresh frame of the first area to be compensated; In a first display frame, the target driving value transmitted by the data line is used as a compensated data voltage and written into the sub-pixels in the first area to be compensated. The first display frame is a refresh frame of the first area to be compensated.

10. The brightness compensation method of a display panel according to claim 1, characterized in that: At least two of the display partitions include a first display partition and a second display partition that are adjacent to each other, a refresh frequency of the first display partition is lower than a refresh frequency of the second display partition, the area to be compensated includes a first area to be compensated, and a position of the first area to be compensated is related to a position of a 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 sub-area, and the second sub-area is located in the second display sub-area; the display panel includes a data line, In a second display frame, a second data voltage transmitted by the data line is written into the sub-pixel in the first sub-area, and then a third data voltage transmitted by the data line is written into the sub-pixel in the second sub-area, the second display frame is a refresh frame of the first sub-area, and the second display frame is a refresh frame of the second sub-area; In the first display frame, the data line transmits the target drive value corresponding to the sub-pixel in the first sub-area obtained after compensating the second data voltage, and then the data line transmits the target drive value corresponding to the sub-pixel in the second sub-area, and the target drive value transmitted by the data line is written into the sub-pixel in the second sub-area as the data voltage. The first display frame is a hold frame for the first sub-area, and the first display frame is a refresh frame for the second sub-area.

11. The brightness compensation method of a display panel according to claim 1, characterized in that: At least two of the display partitions include a first display partition and a second display partition that are adjacent to each other, a refresh frequency of the first display partition is lower than a refresh frequency of the second display partition, the area to be compensated includes a first area to be compensated, and a position of the first area to be compensated is related to a position of a boundary line between the first display partition and the second display partition; the display panel includes a data line, In the second display frame, the data voltage transmitted by the data line is written into the sub-pixels of the first display partition, and then the data voltage transmitted by the data line is written into the sub-pixels of the second display partition.

12. The brightness compensation method of a display panel according to claim 11, characterized in that: At least two of the display partitions include a third display partition adjacent to the second display partition, the second display partition is located between the first display partition and the third display partition, and a refresh frequency of the third display partition is lower than a refresh frequency of the second display partition, In a second display frame, writing data voltages into sub-pixels of the second display sub-area, and then writing data voltages into sub-pixels of the third display sub-area; The area to be compensated includes a second area to be compensated, and a position of the second area to be compensated is related to a position of a boundary line between the third display subarea and the second display subarea; Alternatively, the area to be compensated is not related to the position of the boundary line between the third display subarea and the second display subarea.

13. The brightness compensation method of a display panel according to any one of claims 9 to 11, characterized in that: In a first display frame, performing brightness compensation on the first area to be compensated; Preferably, the first display partition and the second display partition are arranged along a first direction, and the data line extends along the first direction.

14. The brightness compensation method of a display panel according to claim 1, characterized in that: The display panel includes a first gate driving circuit, a plurality of rows of pixel circuits, and a plurality of partition enable signal lines, the first gate driving circuit includes a plurality of cascaded shift register groups, the shift register group includes k cascaded shift register units, k is an integer greater than or equal to 2, the shift register unit includes 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 partition enable signal lines, different shift register groups are connected to the same k partition enable signal lines, an output end of the 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 area to be compensated is greater than or equal to k*m*n rows; Preferably, in the first display frame, the moments when the pulses of the signals on the k partition enable signal lines jump to the enable level are delayed in sequence; in the second display frame, the signals on the k partition enable signal lines are at the enable level; Preferably, k-1 shift register units are connected between two adjacent shift register units connected to the same partition enable signal line; Preferably, in the first display frame, the moment when the pulse of the signal on the k partition enable signal lines jumps to the enable level is related to the position of the dividing line; Preferably, at least two of the display partitions include an adjacent first display partition and a second display partition, a refresh frequency of the first display partition is lower than a refresh frequency of the second display partition, the area to be compensated includes a first area to be compensated, and a position of the first area to be compensated is related to a position of a 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 subarea; Preferably, 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.

15. The brightness compensation method of a display panel according to claim 14, characterized in that: The pixel circuit comprises a driving unit and a threshold compensation unit, wherein the threshold compensation unit is connected between a control terminal and a first terminal of the driving unit, and the control terminal of the threshold compensation unit is electrically connected to an output terminal of the shift register in the first gate driving circuit; Preferably, the threshold compensation unit comprises an N-type transistor; Preferably, the shift register comprises a shift unit and an output unit, the output unit is electrically connected to the shift unit, and the output unit comprises a first transistor and a second transistor; The control end of the first transistor and the control end of the second transistor are both connected to the shift unit, the first end of the first transistor is electrically connected to the partition enable signal line, and the second end of the first transistor is electrically connected to the first end of the second transistor and the output end of the shift register; The second terminal of the second transistor is electrically connected to the first power signal line.

16. A display device, characterized in that: Including a display panel and a driving module; The driving module is used to determine the target driving value of the area to be compensated according to the display data of the area to be compensated when the display panel is a partitioned multi-frequency display; wherein, when the display panel is a partitioned multi-frequency display, the display panel includes at least two display partitions with different refresh frequencies; the position of the area to be compensated is related to the position of the boundary line of the display partitions with different refresh frequencies.

17. The display device according to claim 16, characterized in that: The display data includes display grayscale; Preferably, the driving module includes a first determining unit and a second determining unit; The first determination unit is used to determine a first compensation value according to a display grayscale of a sub-pixel in the area to be compensated; The second determining unit is used to determine a target driving value of the area to be compensated according to the first compensation value; Preferably, the display grayscale includes a first display grayscale and a second display grayscale, the area to be compensated includes a plurality of sub-pixels, and 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.

18. The display device according to claim 17, characterized in that: The area to be compensated includes a plurality of rows of sub-pixels; The first determination unit is specifically configured to determine the first compensation value according to the row number of the sub-pixel in the area to be compensated, the display grayscale and a first compensation table, wherein the first compensation table includes a plurality of rows of first compensation values ​​corresponding to a plurality of display grayscales; Preferably, the first compensation values ​​corresponding to each sub-pixel in the i-th row of sub-pixels in the area to be compensated at multiple display grayscales are the first compensation values ​​in the i-th row of the first compensation table; i is an integer greater than or equal to 1; Preferably, the first compensation value corresponding to the first display grayscale of the X-th row of sub-pixels in the area to be compensated is different from the first compensation value corresponding to the first display grayscale of the Y-th row of sub-pixels in the area to be compensated. And / or, the first compensation value corresponding to the second display grayscale of the X-th row of sub-pixels in the area to be compensated is different from the first compensation value corresponding to the second display grayscale of the Y-th row of sub-pixels in the area to be compensated, and X and Y are different positive integers.

19. The display device according to claim 16, characterized in that: The display data includes display grayscale and display brightness level, Preferably, the area to be compensated includes a plurality of rows of sub-pixels; The driving module includes a first determining unit, a third determining unit, and a second determining unit; The first determination unit is used to determine the first compensation value according to the row number of the sub-pixel in the area to be compensated, the display grayscale and the first compensation table, wherein the first compensation table includes a plurality of rows of first compensation values ​​corresponding to a plurality of display grayscales; The third determination unit is used to determine the second compensation value according to the display grayscale and display brightness level of the sub-pixel in the area to be compensated; The second determining unit is used to determine the target driving value of the area to be compensated according to the first compensation value and the second compensation value; Preferably, the first compensation value corresponding to the first display grayscale of the X-th row of sub-pixels in the area to be compensated is different from the first compensation value corresponding to the first display grayscale of the Y-th row of sub-pixels in the area to be compensated. and / or, a first compensation value corresponding to the second display grayscale of the sub-pixels in the X-th row in the area to be compensated is different from a first compensation value corresponding to the second display grayscale of the sub-pixels in the Y-th row in the area to be compensated, and X and Y are different positive integers; Preferably, the display brightness level includes a first display brightness level and a second display brightness level, and for each sub-pixel of at least a part of the sub-pixels in the area to be compensated, a 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.

20. A method for debugging a display panel, characterized in that: include: Determine a first compensation value according to a row number of sub-pixels in the area to be compensated, a display grayscale, and a first compensation table, wherein the first compensation table includes a plurality of rows of first compensation values ​​corresponding to a plurality of display grayscales; Determining a second compensation value according to a display grayscale and a display brightness level of a sub-pixel in the area to be compensated; Determining a target driving value of the area to be compensated according to the first compensation value and the second compensation value; wherein the display panel includes at least two display partitions with different refresh frequencies; and the position of the area to be compensated is related to the position of the boundary line of the display partitions with different refresh frequencies; When the display uniformity of the display panel does not meet the requirements, at one or more display brightness levels and / or one or more display grayscales, 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; According to the brightness difference or the average of the brightness differences between the brightness of 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 is corrected until the display uniformity of the display panel meets the requirements.

21. The debugging method according to claim 20, characterized in that: The reference brightness is the center brightness of the display panel; And / or, obtaining the brightness of the area to be compensated when the boundary line is located at different positions includes: Acquiring the brightness of the area to be compensated when the dividing line is located in the first display sub-area, the second display sub-area, and the third display sub-area of ​​the display panel; wherein the first display sub-area, the second display sub-area, and the third display sub-area are arranged in sequence along a first direction, the first display sub-area and the third display sub-area are located on opposite sides of the center of the display panel along the first direction, the distance between the first display sub-area and the center of the display panel along the first direction is greater than the distance between the second display sub-area and the center of the display panel along the first direction; the distance between the third display sub-area and the center of the display panel along the first direction is greater than the distance between the second display sub-area and the center of the display panel along the first direction; The display panel includes data lines extending along the first direction. Preferably, the distances between the first display sub-area, the second display sub-area and the third display sub-area and the chip binding area of ​​the display panel decrease successively, the brightness of the first display sub-area, the second display sub-area and the third display sub-area decreases successively, and the brightness difference between the first display sub-area, the second display sub-area and the third display sub-area and the central brightness of the display panel increases successively.

22. The debugging method according to claim 20, characterized in that: The first compensation value and / or the second compensation value is corrected 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 requirement, including: Determining a correction parameter according to the brightness difference or the mean of the brightness difference; The product of the second compensation value and the correction parameter is used as the corrected second compensation value.

23. A debugging device for a display panel, characterized in that: include: A first determining unit, a second determining unit, a third determining unit, a brightness acquiring unit and a correcting unit; The first determination unit is used to determine the first compensation value according to the row number of the sub-pixel in the area to be compensated, the display grayscale and the first compensation table, wherein the first compensation table includes a plurality of rows of first compensation values ​​corresponding to a plurality of display grayscales; The second determination unit is used to determine the second compensation value according to the display grayscale and brightness level of the sub-pixel in the area to be compensated; The third determination unit is used to determine the target driving value of the area to be compensated according to the first compensation value and the second compensation value; wherein the display panel includes at least two display partitions with different refresh frequencies; the position of the area to be compensated is related to the position of the boundary line of the display partitions with different refresh frequencies; The brightness acquisition unit is used to adjust the position of the dividing 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 when the display uniformity of the display panel does not meet the requirements, so as to obtain the brightness of the area to be compensated when the dividing line is located at different positions; The correction unit 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 differences 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.

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