Display panel and gray scale compensation method thereof

Abstract

The embodiment of the invention discloses a display panel and a gray scale compensation method thereof.The display panel comprises N gate lines, L data lines, a first gate driving module, a second gate driving module, a brightness acquisition module and a source driving module, the first gate driving module is connected with the first gate line to the Mth gate line, and the second gate driving module is connected with the second gate line to the Mth gate line; the second gate driving module is connected with the (M + 1) th gate line to the Nth gate line; the signal transmission direction from the first gate line to the Mth gate line is opposite to the signal transmission direction from the (M + 1) th gate line to the Nth gate line; the display panel comprises P first display subareas, and the source electrode driving module is used for compensating gray scales of pixel units in the corresponding first display subareas according to brightness information, collected by the brightness collection module, of the multiple first display subareas on the same row or the same column. The scheme is beneficial to improving the display quality.

Description

Technical Field

[0001] Embodiments of the present invention relate to the field of display technologies, and in particular, to a display panel and a grayscale compensation method therefor. Background Art

[0002] With the development of display technologies, the requirements for display quality are getting higher and higher.

[0003] Currently, for a display panel with a multi-gate driving module, an interlaced driving method is usually adopted for scanning. However, due to line losses in the connection lines and / or gate lines connecting the gate driving module and the pixel units, there are significant differences in RC loading between adjacent rows, resulting in the appearance of fine horizontal stripes in a grayscale image, and the display quality is poor. Summary of the Invention

[0004] Embodiments of the present invention provide a display panel and a grayscale compensation method therefor to improve display quality.

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

[0006] N gate lines and L data lines, the N gate lines extending along a first direction and arranged along a second direction, the L data lines extending along the second direction and arranged along the first direction, pixel units being disposed in regions defined by the intersection of the gate lines and the data lines, the first direction intersecting the second direction;

[0007] A first gate driving module and a second gate driving module, the first gate driving module being connected to the first to the M-th of the gate lines, the second gate driving module being connected to the (M + 1)-th to the N-th of the gate lines; wherein, M < N, and both M and N are positive integers greater than 1; the signal transmission direction on the first to the M-th of the gate lines is opposite to the signal transmission direction on the (M + 1)-th to the N-th of the gate lines;

[0008] A brightness acquisition module and a source driving module, the brightness acquisition module being connected to the source driving module, the source driving module being connected to the L data lines, the display panel including P first display partitions, the P first display partitions being arranged in an array along the first direction and the second direction, the source driving module being configured to compensate the grayscale of the pixel units in the corresponding first display partitions according to the brightness information of multiple first display partitions in the same row or the same column acquired by the brightness acquisition module, P and L both being positive integers.

[0009] Optionally, the display panel further includes Q second display partitions, and each of the first display partitions includes c second display partitions, where c and Q are both positive integers.

[0010] Optionally, the second display partition includes a gate lines and b data lines, where a is an integer greater than or equal to 1 and divisible by N, and b is an integer greater than or equal to 1 and divisible by L.

[0011] Optionally, the number of the second display partitions in the same column is an even number.

[0012] Optionally, the number of the first display partitions in the same row is P / 2, and each of the first display partitions in the same row includes M gate lines; the compensation gray levels corresponding to the first display partitions in the same row decrease or increase in sequence, and the compensation gray levels corresponding within each first display partition are the same; M = N / 2;

[0013] Wherein, one brightness acquisition module is correspondingly arranged for each of the first display partitions.

[0014] Optionally, the P first display partitions are arranged along a second direction;

[0015] The number of the first display partitions corresponding to the first gate driving module is m, and the compensation gray levels corresponding to the m first display partitions decrease or increase in sequence;

[0016] The number of the first display partitions corresponding to the second gate driving module is n, and the compensation gray levels corresponding to the n first display partitions decrease or increase in sequence; both m and n are integers greater than or equal to 2 and less than P;

[0017] Wherein, one brightness acquisition module is correspondingly arranged for each of the first display partitions.

[0018] Optionally, the first gate driving module and the second gate driving module are located on the same side of the display panel.

[0019] According to another aspect of the present invention, a grayscale compensation method for a display panel is provided. The display panel includes a plurality of pixel units arranged in an array, N gate lines, L data lines, a first gate driving module, a second gate driving module, a brightness acquisition module, and a source driving module. The brightness acquisition module is connected to the source driving module, the source driving module is connected to the L data lines, the N gate lines extend along a first direction and are arranged along a second direction, the L data lines extend along the second direction and are arranged along the first direction, and pixel units are provided in regions defined by the intersection of the gate lines and the data lines. The first direction intersects with the second direction; wherein, M < N, and both M and N are positive integers greater than 1; the signal transmission direction on the first to the M-th gate lines is opposite to the signal transmission direction on the (M + 1)-th to the N-th gate lines;

[0020] The grayscale compensation method for the display panel includes:

[0021] Controlling the source driving module to divide the display panel into P first display partitions arranged in an array, where P is a positive integer;

[0022] Controlling the brightness acquisition module to acquire the brightness information of multiple first display partitions on the same column or the same row;

[0023] Controlling the source driving module to compensate the grayscale of the pixel units in each of the first display partitions on the same column or the same row according to the brightness information.

[0024] Optionally, controlling the source driving module to divide the display panel into P first display partitions arranged in an array includes:

[0025] Based on a preset rule, controlling the source driving module to divide the display panel into Q second display partitions according to the number of gate lines and the number of data lines;

[0026] Controlling the source driving module to divide the Q second display partitions into P first display partitions according to the preset rule, and each first display partition includes c second display partitions; where Q and c are both positive integers.

[0027] Optionally, controlling the source driving module to compensate the grayscale of the pixel units in each of the first display partitions on the same column or the same row according to the brightness information includes:

[0028] Controlling the source driving module to adjust the gray-scale voltages corresponding to all the second display partitions in each of the first display partitions according to the brightness information of a plurality of the first display partitions on the same column or the same row; wherein, the gray-scale voltages compensated for all the second display partitions within the same first display partition are the same;

[0029] Based on the adjusted gray-scale voltages of the second display partitions, controlling the source driving module to determine whether the brightness difference between a plurality of the first display partitions on the same column or the same row is less than a preset value according to the brightness information collected by the brightness acquisition module;

[0030] If so, controlling the source driving module to save the adjusted gray-scale voltages to the corresponding registers;

[0031] If not, continuously updating the gray-scale voltages according to the brightness difference between a plurality of the first display partitions on the same column or the same row until the brightness difference between a plurality of the first display partitions on the same column or the same row is less than the preset value.

[0032] In the technical solution provided by the embodiment of the present invention, the first gate driving module transmits gate signals to the first to Mth gate lines of the display panel, and the second gate driving module transmits gate signals to the (M + 1)th to Nth gate lines of the display panel, so that the charging directions of the first to Mth row pixel units are the same, and the charging directions of the (M + 1)th to Nth row pixel units are the same, which can reduce the difference between the RC loadings corresponding to two adjacent gate lines among the first to Mth gate lines, and reduce the difference between the RC loadings corresponding to two adjacent gate lines among the (M + 1)th to Nth gate lines, thereby being beneficial to improving the fine stripe phenomenon. At the same time, the display panel is divided into a plurality of first display partitions arranged in an array, the brightness acquisition module collects the brightness information of a plurality of the first display partitions on the same row or the same column, and the source driving module compensates the gray levels of the pixel units in the first display partitions on the same row or the same column according to the brightness information collected by the brightness acquisition module to eliminate the brightness difference phenomenon caused by factors such as line resistance, which is beneficial to improving the brightness uniformity and the display quality.

[0033] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the present invention, nor is it used 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

[0034] To more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the accompanying drawings required for the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0035] Figure 1 Schematic diagram of the structure of a display panel provided by an embodiment of the present invention;

[0036] Figure 2 Schematic diagram of the structure of another display panel provided by an embodiment of the present invention;

[0037] Figure 3 Schematic diagram of the structure of another display panel provided by an embodiment of the present invention;

[0038] Figure 4 Schematic diagram of the display effect of a display panel provided by an embodiment of the present invention;

[0039] Figure 5 Schematic diagram of the gray scale of a display panel after compensation provided by an embodiment of the present invention;

[0040] Figure 6 Schematic diagram of the display effect of another display panel provided by an embodiment of the present invention;

[0041] Figure 7 Schematic diagram of the display effect of another display panel provided by an embodiment of the present invention;

[0042] Figure 8 Schematic diagram of the structure of another display panel provided by an embodiment of the present invention;

[0043] Figure 9 Schematic diagram of the gray scale of another display panel after compensation provided by an embodiment of the present invention;

[0044] Figure 10 Schematic diagram of the flow of a gray scale compensation method for a display panel provided by an embodiment of the present invention;

[0045] Figure 11 Schematic diagram of the flow of another gray scale compensation method for a display panel provided by an embodiment of the present invention;

[0046] Among them, 11 - First gate driving module; 12 - Second gate driving module; 21 - Source driving module; 31 - Brightness acquisition module;

[0047] A1 - First display area; A2 - Second display area;

[0048] DP1 - Upper half screen; DP2 - Lower half screen. Detailed implementation manners

[0049] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0050] It should be noted that the terms "first", "second", etc. in the description and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily need to be used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances 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 "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device including a series of steps or units does not necessarily have to be limited to those clearly listed steps or units, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0051] Figure 1 It is a schematic structural diagram of a display panel provided by an embodiment of the present invention. Figure 2 It is a schematic structural diagram of another display panel provided by an embodiment of the present invention. Referring to Figure 1 and Figure 2 , the display panel provided in this embodiment includes:

[0052] N gate lines and L data lines. The N gate lines extend along the first direction X and are arranged along the second direction Y. The L data lines extend along the second direction Y and are arranged along the first direction X. Pixel units are provided in the regions defined by the intersection of the gate lines and the data lines. The first direction X intersects with the second direction Y.

[0053] A first gate driving module 11 and a second gate driving module 12. The first gate driving module 11 is connected to the first gate line G1 to the Mth gate line GM, and the second gate driving module 12 is connected to the (M + 1)th gate line GM+1 to the Nth gate line GN; where M < N, and both M and N are positive integers greater than 1; the signal transmission direction on the first gate line G1 to the Mth gate line GM is opposite to the signal transmission direction on the (M + 1)th gate line GM+1 to the Nth gate line GN.

[0054] A brightness acquisition module 31 and a source driver module 21, the brightness acquisition module 31 is connected to the source driver module 21, the source driver module 21 is connected to L data lines, the display panel includes P first display partitions A1, and the P first display partitions A1 are arranged in an array along a first direction X and a second direction Y. The source driver module 21 is configured to compensate the gray levels of the pixel units in the corresponding first display partition A1 according to the brightness information of multiple first display partitions A1 in the same row or the same column collected by the brightness acquisition module 31. Both P and L are positive integers.

[0055] Specifically, the N gate lines are respectively G1, G2... GM, GM + 1... GN - 1, GN, and the L data lines are respectively D1... DL. Pixel units are provided in each area defined by the intersection of the gate lines and the data lines, and the pixel units are arranged in an array. The pixel unit includes a thin film transistor, and the thin film transistor is connected to the gate line and the data line. The gate line is configured to transmit the gate control signal output by the gate driver module to the thin film transistor in the pixel unit. When the thin film transistor is turned on, it controls the data voltage transmitted by the data line to make the pixel unit emit lights of different colors.

[0056] The first gate driver module 11 is connected to the first gate line G1 and the Mth gate line GM, and the second gate driver module 12 is connected to the (M + 1)th gate line GM + 1 to the Nth gate line GN. For example, M = N / 2, then the first gate driver module 11 is used to drive the upper half screen of the display panel, and the second gate driver module 12 is used to drive the lower half screen of the display panel, and the scanning directions of the upper half screen and the lower half screen are opposite. Therefore, for the upper half screen or the lower half screen, the scanning directions of the pixel units in adjacent rows are the same, and the phenomenon of interlaced scanning of odd and even rows will not occur. Therefore, the phenomenon of fine horizontal stripes can be avoided. However, due to the existence of line resistance, there are differences in the emission brightness of the pixel units arranged in the same direction, which is not conducive to improving the display quality.

[0057] Such as Figure 2As shown, in this embodiment, the display panel is divided into multiple first display partitions A1. The brightness acquisition module 31 acquires the brightness information of multiple first display partitions A1 in the same row or the same column (the first direction X can be the row direction, and the second direction Y can be the column direction). The source driver module 21 compensates the gray levels of the pixel units in the first display partition A1 according to the brightness information acquired by the brightness acquisition module 31 to eliminate the difference in the emission brightness of multiple first display partitions A1 in the same row or the same column. For example, at the same gray level, if the brightness of multiple first display partitions A1 in the same row in the upper half of the screen decreases in sequence, the source driver module 21 can compensate the gray levels of the pixel units in these first display partitions A1 to different degrees, perform negative compensation on the first display partition A1 with high brightness, such as reducing the gray level voltage corresponding to the first display partition A1 with high brightness; or perform positive compensation on the first display partition A1 with low brightness, such as increasing the gray level voltage corresponding to the first display partition A1 with low brightness.

[0058] In the technical solution provided by the embodiment of the present invention, the first gate driver module 11 transmits gate signals to the first to the Mth gate lines of the display panel, and the second gate driver module 12 transmits gate signals to the (M + 1)th to the Nth gate lines of the display panel, so that the charging directions of the first to the Mth row pixel units are the same, and the charging directions of the (M + 1)th to the Nth row pixel units are the same. This can reduce the difference between the RC loadings corresponding to two adjacent gate lines among the first to the Mth gate lines and reduce the difference between the RC loadings corresponding to two adjacent gate lines among the (M + 1)th to the Nth gate lines, thereby facilitating the improvement of the fine stripe phenomenon. At the same time, the display panel is divided into multiple first display partitions A1 arranged in an array. The brightness acquisition module 31 acquires the brightness information of multiple first display partitions A1 in the same row or the same column, and the source driver module 21 compensates the gray levels of the pixel units in the first display partitions A1 in the same row or the same column according to the brightness information acquired by the brightness acquisition module 31 to eliminate the brightness difference phenomenon caused by factors such as line resistance, which is beneficial to improving the brightness uniformity and the display quality.

[0059] Figure 3 It is a schematic structural diagram of another display panel provided by the embodiment of the present invention. Refer to Figure 3 , on the basis of the above embodiment, optionally, the display panel further includes Q second display partitions A2, and each first display partition A1 includes c second display partitions A2, where c and Q are both positive integers; Q = P * c.

[0060] Among them, the second display partition A2 includes a gate lines and b data lines, where a is an integer greater than or equal to 1 and divisible by N, and b is an integer greater than or equal to 1 and divisible by L. And the number of second display partitions A2 in the same column is even. Here, the source driver module 21 can divide the display panel into Q second display partitions A2 based on a preset rule according to the number of gate lines and data lines in the display panel, and divide the Q second display partitions A2 into P first display partitions A1 according to a preset rule. Each first display partition A1 includes c second display partitions A2. The preset rule can be: in the first direction X, the number of first display partitions A1 is an even partition number greater than or equal to 2, and in the second direction Y, the number of second display partitions A2 is an even partition number greater than or equal to 2, that is, P is an even number greater than or equal to 4. In each first display partition A1, in the first direction X, the number of second display partitions A2 is a natural number partition number greater than or equal to 2, and in the second direction Y, the number of second display partitions A2 is a natural number partition number greater than or equal to 2, that is, c is a natural number greater than or equal to 4.

[0061] Specifically, the number of corresponding gate lines is different for different architectures of pixel units. For example, the architectures of pixel units include a single gate line architecture (i.e., one pixel unit is connected to one gate line), a double gate line architecture (i.e., one pixel unit is connected to two gate lines), and a triple gate line architecture (i.e., one pixel unit is connected to three gate lines). For example, if the resolution of the display panel is 1920*480, then for the single gate line architecture, the number of gate lines N = 480, and the number of data lines L = 3*1920; for the double gate line architecture, the number of gate lines N = 2*480, and the number of data lines L = 1920*3 / 2; for the triple gate line architecture, the number of gate lines N = 3*480, and the number of data lines L = 1920.

[0062] In this embodiment, the source driver module 21 is a chip with an integrated local dimming function, and the pixel compensation function in the source driver module 21 is used for grayscale compensation. Among them, the number of the second display partitions A2 of the display panel in the first direction X and the second direction Y is related to the number of partitions supported by the source driver module 21. For the number of partitions of the second display partition A2 in the first direction X, the maximum value that can be divided evenly by the number of data lines L can be selected within the horizontal partition range supported by the source driver module 21; for the number of partitions of the second display partition A2 in the second direction Y, an even number greater than 2 can be selected within the vertical partition range supported by the source driver module 21. Exemplarily, the horizontal partition range supported by the source driver module 21 is 4 to 127, and the vertical partition range is 4 to 127. Taking the display panel with a resolution of 1920*480 and a three-gate line architecture as an example, N = 3*480 = 1440, L = 1920. Therefore, the number of horizontal partitions of the second display partition A2 can be 120, and the number of vertical partitions can be 4. That is, the entire display panel is divided into 4 rows and 120 columns by the second display partition A2, with a total of 480 second display partitions A2. Each second display partition A2 includes 16 data lines and 360 gate lines.

[0063] Continue to refer to Figure 3 , optionally, the number of the first display partitions A1 in the same row is P / 2, and the first display partitions A1 in the same row include M gate lines; the compensation grayscales corresponding to the first display partitions A1 in the same row decrease or increase in sequence, and the compensation grayscales corresponding within the same first display partition A1 are the same; M = N / 2.

[0064] Specifically, Figure 4 is a schematic diagram of the display effect of a display panel provided by an embodiment of the present invention. Combining Figure 3 and Figure 4 , in the first direction X, due to the long length of the gate lines, affected by their line resistance, the conduction degrees of the thin film transistors in the pixel units in the same row are different, resulting in different emission brightnesses of the pixel units in the same row of the display panel, thereby causing a brightness difference in the first direction X of the display panel. And because the scanning directions of the upper half screen DP1 and the lower half screen DP2 are opposite, therefore, the trends of the brightness changes of the upper half screen DP1 and the lower half screen DP2 in the first direction X are opposite, and thus a split screen phenomenon occurs at the positions of the Mth gate line GM and the (M + 1)th gate line GM+1 (as shown by the red dotted line in Figure 4 ).

[0065] In this embodiment, since the brightness change only occurs in the first direction X of the two half screens, for the same data line, it only needs to be able to compensate the gray scale voltages of the upper half screen and the lower half screen respectively. Therefore, in the second direction Y, the number of the second display partitions A2 can be selected as the smallest even number greater than 2 to meet the compensation requirements. For example, if the number of vertical partitions supported by the source drive module 21 is 4 to 127, then in the second direction Y, the number of the second display partitions A2 can be selected as 4. At the same time, in the first direction X, 120 second display partitions A2 are equally divided into a plurality of first display partitions A1. For example, they are divided into 4 (P = 8) first display partitions A1, and each first display partition A1 includes 60 second display partitions A2. That is, on the entire display panel, the second display partitions A2 include 2 rows and 4 columns.

[0066] For the upper half screen DP1, the scanning direction is from left to right, and the charging degree of the pixel units in the same row gradually decreases from left to right. Therefore, at the same gray scale, such as the 255 gray scale, the brightness of the first first display partition A1 is the brightest, and the brightness of the fourth first display partition A1 is the darkest. A brightness acquisition module 31 is correspondingly arranged at each first display partition A1 position. The source drive module 21 compensates the gray scale of the first display partition A1 according to the brightness information output by each brightness acquisition module 31, and the compensated gray scales within the same first display partition A1 are the same. For example, Figure 5 It is a schematic diagram of the gray scale after compensation of a display panel provided by an embodiment of the present invention. Figure 6 It is a schematic diagram of the display effect of another display panel provided by an embodiment of the present invention. The compensated gray scale of the first first display partition A1 is -3, that is, the gray scale after compensation of the first first display partition A1 is 252 gray scale (L252); the compensated gray scale of the second first display partition A1 is -2, that is, the gray scale after compensation of the second first display partition A1 is 253 gray scale (L253); the compensated gray scale of the third first display partition A1 is -1, that is, the gray scale after compensation of the third first display partition A1 is 254 gray scale (L254); the compensated gray scale of the fourth first display partition A1 is 0, that is, the gray scale of the fourth first display partition A1 remains unchanged at 255 gray scale (L255), so as to compensate the brightness of the four first display partitions A1 of the upper half screen DP1 to the same state and reduce the brightness difference in the first direction X.

[0067] Accordingly, for the lower half screen DP2, the scanning direction is from right to left, and the charging degree of pixel units in the same row gradually decreases from right to left. Therefore, at the same gray level, such as gray level 255, the brightness of the first first display partition A1 is the darkest, and the brightness of the fourth first display partition A1 is the brightest. A brightness acquisition module 31 is correspondingly arranged at each position of the first display partition A1. The source driving module 21 compensates the gray levels of the first display partitions A1 of the lower half screen DP2 according to the brightness information output by each brightness acquisition module 31. The compensated gray levels within the same first display partition A1 are the same. Continuing to refer to Figure 5 and Figure 6 , the compensated gray level of the first first display partition A1 is 0, that is, the first first display partition A1 remains at gray level 255 (L255) unchanged; the compensated gray level of the second first display partition A1 is -1, that is, the gray level of the second first display partition A1 after compensation is 254 gray levels (L254); the compensated gray level of the third first display partition A1 is -2, that is, the gray level of the third first display partition A1 after compensation is 253 gray levels (L253); the compensated gray level of the fourth first display partition A1 is -3, that is, the gray level of the fourth first display partition A1 after compensation is 252 gray levels (L252), so as to compensate the brightness of the four first display partitions A1 of the lower half screen DP2 to the same state and reduce the brightness difference in the first direction X (as Figure 6 shown).

[0068] The technical solution provided by the embodiment of the present invention divides the display panel into multiple second display partitions A2, divides the multiple second display partitions A2 into multiple first display partitions A1, detects the brightness information of the multiple first display partitions A1, and then adjusts the gray levels of each second display partition A2 within the same row of the first display partitions according to the brightness difference of the first display partitions in the same row, so as to achieve the uniformity of the brightness of the entire display screen.

[0069] In this embodiment, the purpose of dividing the multiple second display partitions A2 into the first display partitions A1 is that only the brightness acquisition module 31 needs to be arranged in the corresponding first display partition A1, and there is no need to arrange the brightness acquisition module 31 in each second display partition A2, which is beneficial to saving the number of brightness acquisition modules 31 and reducing costs.

[0070] Figure 7 It is a schematic diagram of the display effect of another display panel provided by the embodiment of the present invention. Refer to Figure 1 and Figure 7, without considering the conduction degree of pixel units and only considering the loss between the gate driving module and the gate line, the line loss degree at the end far from the gate driving module is greater than that at the end close to the gate driving module. In this embodiment, the first gate driving module 11 and the second gate driving module 12 are located on the same side of the display panel, such as both are arranged on the lower border of the display panel. Therefore, whether it is the upper half screen DP1 or the lower half screen DP2, the light-emitting brightness of the pixel units at the end far from the gate driving module is dimmer, and the light-emitting brightness of the pixel units at the end close to the gate driving module is brighter.

[0071] Regarding the above problems, Figure 8 is a schematic structural diagram of another display panel provided by an embodiment of the present invention. Refer to Figure 1 , Figure 8 , optionally, P first display partitions A1 are arranged along the second direction Y; the number of first display partitions A1 corresponding to the first gate driving module 11 is m, and the compensation gray levels corresponding to the m first display partitions A1 decrease or increase in sequence; the number of first display partitions A1 corresponding to the second gate driving module 12 is n, and the compensation gray levels corresponding to the n first display partitions A1 decrease or increase in sequence; both m and n are integers greater than or equal to 2 and less than P.

[0072] Specifically, still taking the whole display panel being divided into 4 rows and 120 columns by the second display partition A2, a total of 480 second display partitions A2, and each second display partition A2 including 16 data lines and 360 gate lines as an example, P first display partitions A1 are arranged along the second direction Y. Among them, the upper half screen DP1 includes m first display partitions A1, and the lower half screen DP2 includes n first display partitions A1. Preferably, m = n = P / 2. For example, P = 6, m = n = 3. Of course, in other embodiments, P can also be equal to 8, then m = n = 4. Here, since the conduction degree of pixel units in each row is not considered, therefore, in the same row, only one first display partition A1 can be included, and each first display partition A1 includes 240 gate lines.

[0073] For the upper half screen DP1, from top to bottom, at the same gray level, such as the 255 gray level, the light-emitting brightness becomes brighter in sequence. A brightness acquisition module 31 is correspondingly arranged at each position of the first display partition A1, and the source driving module 21 compensates the gray level of the first display partition A1 according to the brightness information output by each brightness acquisition module 31. The compensation gray levels within the same first display partition A1 are the same. Figure 9 is a schematic diagram of the gray level after compensation of another display panel provided by an embodiment of the present invention, such as Figure 9As shown, the compensation gray level of the first first display partition A1 is 0, that is, the gray level after compensation of the first first display partition A1 remains unchanged at 255 gray levels (L255); the compensation gray level of the second first display partition A1 is -1, that is, the gray level after compensation of the second first display partition A1 is 254 gray levels (L254); the compensation gray level of the third first display partition A1 is -2, that is, the gray level after compensation of the third first display partition A1 is 253 gray levels (L253), so as to compensate the brightness of the three first display partitions A1 in the upper half screen DP1 to the same state and reduce the brightness difference in the second direction Y (as Figure 6 shown).

[0074] For the lower half screen DP2, its compensation method is the same as that of the upper half screen DP1 and will not be elaborated here.

[0075] It should be noted that the higher the gray level, the greater the brightness. In order to prevent overcompensation caused by too large a compensation gray level, the maximum compensation gray level needs to be limited within a preset compensation gray level. For example, the maximum compensation gray level does not exceed 3 gray levels, that is, the preset gray level is ±3 gray levels. Among them, the number of first display partitions A1 in the same row or the same column is determined according to the maximum compensation gray level.

[0076] Optionally, in other embodiments, the number of gate lines of the upper half screen DP1 and the lower half screen DP2 may also be unequal.

[0077] Optionally, an embodiment of the present invention further provides a gray level compensation method for a display panel, which can be used to perform gray level compensation on the display panel provided in any of the above embodiments. Figure 10 is a schematic flowchart of a gray level compensation method for a display panel provided by an embodiment of the present invention. Combining Figure 10 and Figure 1 , the gray level compensation method for the display panel provided in this embodiment includes:

[0078] S110. Control the source drive module to divide the display panel into P first display partitions arranged in an array, where P is a positive integer.

[0079] S120. Control the brightness acquisition module to collect the brightness information of multiple first display partitions in the same column or the same row.

[0080] S130. Control the source drive module to compensate the gray levels of the pixel units in each first display partition in the same column or the same row according to the brightness information.

[0081] In the technical solution provided by the embodiment of the present invention, the first gate driving module 11 transmits gate signals to the first to Mth gate lines of the display panel, and the second gate driving module 12 transmits gate signals to the (M + 1)th to Nth gate lines of the display panel, so that the charging directions of the first to Mth row pixel units are the same, and the charging directions of the (M + 1)th to Nth row pixel units are the same. This can reduce the difference between the RC loadings corresponding to two adjacent gate lines among the first to Mth gate lines, and reduce the difference between the RC loadings corresponding to two adjacent gate lines among the (M + 1)th to Nth gate lines, thereby facilitating the improvement of the fine stripe phenomenon. At the same time, the display panel is divided into a plurality of first display partitions A1 arranged in an array. The brightness acquisition module 31 acquires the brightness information of a plurality of first display partitions A1 in the same row or the same column. The source driving module 21 compensates the gray levels of the pixel units in the first display partition A1 in the same row or the same column according to the brightness information acquired by the brightness acquisition module 31, so as to eliminate the brightness difference phenomenon caused by factors such as line resistance, which is beneficial to improving the brightness uniformity and the display quality.

[0082] Figure 11 It is a schematic flowchart of a gray level compensation method for another display panel provided by an embodiment of the present invention. Refer to Figure 11 , on the basis of the above embodiment, the gray level compensation method for the display panel provided by this embodiment includes:

[0083] S1101. Based on a preset rule, control the source driving module to divide the display panel into Q second display partitions according to the number of gate lines and the number of data lines.

[0084] S1102. Control the source driving module to divide the Q second display partitions into P first display partitions according to a preset rule. Each first display partition includes c second display partitions; where Q and c are both positive integers.

[0085] Among them, the division methods of the first display partition A1 and the second display partition A2 can refer to the relevant descriptions of Figure 3 and Figure 8 , which will not be elaborated here.

[0086] S120. Control the brightness acquisition module to acquire the brightness information of a plurality of first display partitions in the same column or the same row.

[0087] Among them, in combination with 1 and Figure 3 , a brightness acquisition module 31 can be set at the position of each first display partition A1, and the brightness acquisition module 31 acquires the brightness information of the corresponding first display partition A1.

[0088] S1301. Control the source driver module to adjust the gray-scale voltages corresponding to all the second display partitions in each first display partition according to the brightness information of multiple first display partitions on the same column or the same row; wherein, the gray-scale voltages compensated for all the second display partitions in the same first display partition are the same.

[0089] S1302. Based on the adjusted gray-scale voltages of each second display partition, control the source driver module to determine whether the brightness difference between multiple first display partitions on the same column or the same row is less than a preset value according to the brightness information collected by the brightness acquisition module.

[0090] S1303. If so, control the source driver module to save the adjusted gray-scale voltages to the corresponding registers.

[0091] S1304. If not, continue to update the gray-scale voltages according to the brightness difference between multiple first display partitions on the same column or the same row until the brightness difference between multiple first display partitions on the same column or the same row is less than the preset value.

[0092] Specifically, the gray-scale compensation process can be carried out in the self-check mode when the display panel is started. For example, the brightness detection is carried out in the pure color screens such as black, white, red, green, blue, etc. of the general self-check screen, and the detection results are fed back to the source driver module 21 to compensate the gray-scale of the partitions. Among them, the gray-scale compensation process is the compensation process of the gray-scale voltage (i.e., the data voltage), and the compensated gray-scale needs to be converted into the gray-scale voltage.

[0093] After the source driver module 21 receives the brightness information of each first display partition A1 on the same row or the same column fed back by the brightness acquisition module 31, the source driver module 21 adjusts the gray-scale voltages transmitted to the data lines in each second display partition A1 according to the brightness information of each first display partition A1 on the same row or the same column. Among them, the gray-scale voltages adjusted for all the second display partitions A2 in the same first display partition A1 are the same to ensure the same gray-scale. By compensating the brighter first display partition A1 to a slightly lower gray-scale and the darker first display partition A1 to a slightly higher gray-scale, the effect of balancing the brightness of the entire display panel is achieved.

[0094] Based on the adjusted gray-scale voltages of each second display partition A2, continue to determine whether the brightness difference of the first display partitions A1 in the same row or the same column is less than a preset value. If so, save the adjusted gray-scale voltages in the register inside the source driver module 21 and exit the self-check mode for direct call during subsequent display processes. If not, the source driver module 21 adjusts again the gray-scale voltages transmitted to the data lines in each second display partition A1 according to the brightness information of the first display partitions A1 in the same row or the same column to update the gray-scale voltages adjusted last time until the brightness difference of the first display partitions A1 in the same row or the same column is less than the preset value. After that, save the qualified gray-scale voltages in the register and exit the self-check mode.

[0095] It should be understood that various forms of the processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in the present invention can be executed in parallel, sequentially, or in a different order, as long as the desired results of the technical solution of the present invention can be achieved, and no limitation is imposed herein.

[0096] The above specific embodiments do not limit the protection scope of the present invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A display panel, characterized in that, Including: N gate lines and L data lines, where the N gate lines extend along a first direction and are arranged along a second direction, the L data lines extend along the second direction and are arranged along the first direction, pixel units are arranged in regions defined by the intersection of the gate lines and the data lines, and the first direction intersects the second direction; A first gate driving module and a second gate driving module, where the first gate driving module is connected to the first to the M-th gate lines, and the second gate driving module is connected to the (M + 1)-th to the N-th gate lines; where M < N, and both M and N are positive integers greater than 1; the signal transmission direction on the first to the M-th gate lines is opposite to the signal transmission direction on the (M + 1)-th to the N-th gate lines; A brightness acquisition module and a source driving module, where the brightness acquisition module is connected to the source driving module, the source driving module is connected to the L data lines, the display panel includes P first display partitions, and the P first display partitions are arranged in an array along the first direction and the second direction. The source driving module is configured to compensate the gray levels of the pixel units in the corresponding first display partitions according to the brightness information of multiple first display partitions in the same row or the same column acquired by the brightness acquisition module. Both P and L are positive integers.

2. The display panel according to claim 1, wherein The display panel further includes Q second display partitions, and each first display partition includes c second display partitions, where both c and Q are positive integers.

3. The display panel according to claim 2, wherein Each second display partition includes a gate lines and b data lines, where a is an integer greater than or equal to 1 and divisible by N, and b is an integer greater than or equal to 1 and divisible by L.

4. The display panel according to claim 2, wherein The number of second display partitions in the same column is even.

5. The display panel according to claim 2, characterized in that, The number of first display partitions in the same row is P / 2, and the first display partitions in the same row include M gate lines; the compensation gray levels corresponding to the first display partitions in the same row decrease or increase in sequence, and the compensation gray levels corresponding within the same first display partition are the same; M = N / 2; Wherein, one brightness acquisition module is correspondingly arranged for each first display partition.

6. The display panel according to claim 2, wherein, The P first display partitions are arranged along the second direction; The number of first display partitions corresponding to the first gate driving module is m, and the compensation gray levels corresponding to the m first display partitions decrease or increase in sequence; The number of first display partitions corresponding to the second gate driving module is n, and the compensation gray levels corresponding to the n first display partitions decrease or increase in sequence; both m and n are integers greater than or equal to 2 and less than P; Wherein, one brightness acquisition module is correspondingly arranged for each first display partition.

7. The display panel according to claim 1, characterized in that, The first gate driving module and the second gate driving module are located on the same side of the display panel.

8. A grayscale compensation method for a display panel, characterized in that, The display panel includes a plurality of pixel units arranged in an array, N gate lines, L data lines, a first gate driving module, a second gate driving module, a brightness acquisition module, and a source driving module. The brightness acquisition module is connected to the source driving module, the source driving module is connected to the L data lines, the N gate lines extend in a first direction and are arranged in a second direction, the L data lines extend in the second direction and are arranged in the first direction, and pixel units are provided in the regions defined by the intersection of the gate lines and the data lines. The first direction intersects the second direction; wherein, M < N, and both M and N are positive integers greater than 1; the signal transmission directions on the first to the M-th gate lines are opposite to the signal transmission directions on the (M + 1)-th to the N-th gate lines; The gray-scale compensation method for the display panel includes: Controlling the source driving module to divide the display panel into P first display partitions arranged in an array, where P is a positive integer; Controlling the brightness acquisition module to acquire the brightness information of a plurality of the first display partitions on the same column or the same row; Controlling the source driving module to compensate the gray scales of the pixel units in each of the first display partitions on the same column or the same row according to the brightness information.

9. The gray-scale compensation method for a display panel according to claim 8, wherein Controlling the source driving module to divide the display panel into P first display partitions arranged in an array includes: Based on a preset rule, controlling the source driving module to divide the display panel into Q second display partitions according to the number of the gate lines and the number of the data lines; Controlling the source driving module to divide the Q second display partitions into P first display partitions according to the preset rule, and each first display partition includes c second display partitions; wherein, both Q and c are positive integers.

10. The gray-scale compensation method for the display panel according to claim 9, wherein Controlling the source driving module to compensate the gray scales of the pixel units in each of the first display partitions on the same column or the same row according to the brightness information includes: Controlling the source driving module to adjust the gray-scale voltages corresponding to all the second display partitions in each of the first display partitions according to the brightness information of a plurality of the first display partitions on the same column or the same row; wherein, the gray-scale voltages compensated for all the second display partitions in the same first display partition are the same; Based on the adjusted gray-scale voltages of the second display partitions, controlling the source driving module to determine whether the brightness difference between a plurality of the first display partitions on the same column or the same row is less than a preset value according to the brightness information acquired by the brightness acquisition module; If so, controlling the source driving module to save the adjusted gray-scale voltages to the corresponding registers; If not, continuously update the gray-scale voltages according to the brightness difference between a plurality of the first display partitions on the same column or the same row until the brightness difference between a plurality of the first display partitions on the same column or the same row is less than the preset value.

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