Data voltage compensation method, data voltage compensation apparatus and display apparatus

Abstract

A data voltage compensation method, a data voltage compensation apparatus and a display apparatus (200). The data voltage compensation method comprises: acquiring an image to be displayed (S110); projecting said image to a display panel, and determining the actual grayscale of a compensation region (AA2) and the actual grayscale of a target region (AA1) (S120); on the basis of the actual grayscale of the compensation region (AA2) and the actual grayscale of the target region (AA1), determining a target compensation value of the compensation region (AA2) (S130); and on the basis of the target compensation value of the compensation region (AA2), determining a target data voltage of the compensation region (AA2) (S140).

Description

Data voltage compensation method, data voltage compensation device and display device

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on April 3, 2024, with application number 202410405990.0, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of display technology, for example, to a data voltage compensation method, a data voltage compensation device, and a display device. Background Art

[0003] In the related art, a fan-out line is provided on the lower frame of the display panel, one end of the fan-out line is connected to the display driver chip, and the other end is connected to the data line located in the display area. However, the fan-out line occupies a large space in the lower frame, which will cause the width of the lower frame to be larger, affecting the appearance. One design scheme is to set part of the fan-out line in the display area (Fanout in Active Area, FIAA) to reduce the width of the lower frame. However, the fan-out line in the related art is arranged parallel to the data line along the longitudinal extension portion. When the voltage transmitted by the fan-out line and the adjacent data line is different, an electromagnetic coupling effect will occur between the two, causing uneven display of the display panel.

[0004] Summary of the Invention

[0005] The present application provides a data voltage compensation method, a data voltage compensation device, and a display device.

[0006] The present application provides a data voltage compensation method, the data voltage compensation method being applied to a display panel, the display panel including a display area, the display area including a target area and a compensation area; the display panel further including a first data line, a second data line, and a fan-out line; the fan-out line including a first connecting line and a second connecting line; the first connecting line and the second connecting line extending in directions intersecting, one end of the first connecting line being connected to the first data line, and the other end of the first connecting line being connected to the second connecting line; the first data line passing through the target area; the second connecting line and the second data line passing through the compensation area; and in the compensation area, the second connecting line extending in directions parallel to the second data line. The method comprises:

[0007] Get the image to be displayed;

[0008] Projecting the image to be displayed onto the display panel, and determining an actual grayscale of the compensation area and an actual grayscale of the target area;

[0009] determining a target compensation value of the compensation area based on the actual grayscale of the compensation area and the actual grayscale of the target area;

[0010] A target data voltage of the compensation area is determined based on the target compensation value of the compensation area.

[0011] The present application also provides a data voltage compensation device, the data voltage compensation device being applied to a display panel, the display panel including a display area, the display area including a target area and a compensation area; the display panel further including a first data line, a second data line, and a fan-out line; the fan-out line including a first connecting line and a second connecting line; the first connecting line and the second connecting line extending in directions intersecting, one end of the first connecting line being connected to the first data line, and the other end of the first connecting line being connected to the second connecting line; the first data line passing through the target area; the second connecting line and the second data line passing through the compensation area; in the compensation area, the second connecting line extending in directions parallel to the second data line; the data voltage compensation device comprising:

[0012] An acquisition module, configured to acquire an image to be displayed;

[0013] a first determining module configured to project the image to be displayed onto the display panel and determine an actual grayscale of the compensation area and an actual grayscale of the target area;

[0014] a second determining module configured to determine a target compensation value of the compensation area based on the actual grayscale of the compensation area and the actual grayscale of the target area;

[0015] The third determining module is configured to determine a target data voltage of the compensation area based on the target compensation value of the compensation area.

[0016] The present application also provides a display device, comprising the data voltage compensation device as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] FIG1 is a schematic diagram of a display panel provided in an embodiment of the present application;

[0018] FIG2 is a flow chart of a data voltage compensation method provided in an embodiment of the present application;

[0019] FIG3 is a flowchart of a method for implementing S130 provided in an embodiment of the present application;

[0020] FIG4 is a schematic diagram of a compensation table provided in an embodiment of the present application;

[0021] FIG5 is a flow chart of another data voltage compensation method provided by an embodiment of the present application;

[0022] FIG6 is a schematic diagram of the structure of a compensation table set provided in an embodiment of the present application;

[0023] FIG7 is a schematic diagram showing a principle for determining a target compensation value according to an embodiment of the present application;

[0024] FIG8 is a flowchart of a method for constructing a compensation table provided in an embodiment of the present application;

[0025] FIG9 is a structural block diagram of a data voltage compensation device provided in an embodiment of the present application;

[0026] FIG10 is a schematic structural diagram of a display device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0027] The following describes the solutions of the present application. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0028] Many details are set forth in the following description to facilitate understanding of the present application, but the present application may also be implemented in other ways different from those described herein; the embodiments in the specification are only part of the embodiments of the present application, not all of the embodiments.

[0029] The present application provides a display panel. The display panel includes a display area, the display area including a target area and a compensation area; the display panel also includes a first data line, a second data line, and a fan-out line; the fan-out line includes a first connecting line and a second connecting line; the first connecting line and the second connecting line extend in intersecting directions, one end of the first connecting line is connected to the first data line, and the other end is connected to the second connecting line; the first connecting line passes through the target area; the second connecting line and the second data line pass through the compensation area; and in the compensation area, the second connecting line extends parallel to the second data line.

[0030] Figure 1 is a schematic diagram of a display panel provided in an embodiment of the present application. Referring to Figure 1 , the display panel includes a display area AA. The display area AA includes a target area AA1 (i.e., the sparse point filling area in Figure 1) and a compensation area AA2 (i.e., the dense point filling area in Figure 1); the display panel also includes a first data line 1, a second data line 2, and a fan-out line 3; the fan-out line 3 includes a first connection line 31 and a second connection line 32; the first connection line 31 extends along the X-axis direction in the figure. The first data line 1, the second data line 2, and the second connection line 32 all extend along the Y-axis direction in the figure. One end of the first connection line 31 is connected to the first data line 1, and the other end is connected to the second connection line 32; the second connection line 32 and the second data line 2 pass through the compensation area AA2; in the compensation area AA2, the second connection line 32 is parallel to the extension direction of the second data line 2. The first connection line 1 passes through the target area AA1. Since the second connection line 32 and the second data line 2 are relatively close, when the voltages transmitted by the second connection line 32 and the second data line 2 are different, an electromagnetic coupling effect occurs between the second connection line 32 and the second data line 2, resulting in different brightness of the target area AA1 and the compensation area AA2, and uneven display of the display panel.

[0031] FIG2 is a flow chart of a data voltage compensation method provided in an embodiment of the present application. The data voltage compensation method can be applied to the display panel provided in FIG1 to solve the problem of uneven display of the display panel. Referring to FIG2 , the data voltage compensation method includes the following steps.

[0032] S110: Acquire an image to be displayed.

[0033] The image to be displayed is an image that needs to be displayed on the display panel but has not yet been displayed. For example, if the display panel is currently displaying the nth frame image of a video, the image to be displayed is an image after the nth frame image, such as the n+1th frame image.

[0034] S120 , projecting the image to be displayed onto the display panel, and determining the actual grayscale of the compensation area and the actual grayscale of the target area.

[0035] The target area is the area in the display area through which the first data line passes. Optionally, the target area includes the connection point between the first connection line and the first data line. The compensation area is the area in the display area through which the second data line and the second connection line pass. In other words, the target area and the compensation area are determined based on the layout of the fan-out lines and the data lines. Based on this, optionally, before performing this step, the method further includes: acquiring an image of the display panel; the image of the display panel includes the first data line, the second data line, and the fan-out line connected to the first data line; and determining the target area and the compensation area in the display panel based on the layout of the first data line, the second data line, and the fan-out line in the image of the display panel.

[0036] The display panel image may be obtained by photographing the display area of ​​the display panel using a device with an image acquisition function, such as a charge-coupled device (CCD) sensor.

[0037] The display panel includes multiple light-emitting units arranged in an array. When displaying an image, each light-emitting unit corresponds to one or more pixels in the image. The brightness of each light-emitting unit is controlled by a data voltage. The higher the grayscale value of the pixel, the higher the brightness of the light-emitting unit. By individually controlling the brightness of multiple light-emitting units, the image is ultimately displayed.

[0038] In practice, a compensation area may include multiple light-emitting units, and a target area may also include multiple light-emitting units. In practice, the average value or median value of the actual grayscales of at least some of the light-emitting units in the compensation area can be used as the actual grayscale of the compensation area. The average value or median value of the actual grayscales of at least some of the light-emitting units in the target area can be used as the actual grayscale of the target area.

[0039] The actual grayscale of the light-emitting unit refers to the grayscale actually displayed by the light-emitting unit after the theoretical data voltage corresponding to each light-emitting unit is applied to the corresponding light-emitting unit, with respect to the image to be displayed.

[0040] Here, the term "theoretical data voltage" refers to the optimal voltage setting assigned to the multiple light-emitting units in the display panel under ideal display conditions, based on image data encoding rules, display device characteristics, and control algorithms, to accurately reproduce image color and brightness levels. Under ideal conditions (i.e., without considering electromagnetic coupling effects or data voltage drops on data lines), when the theoretical data voltage corresponding to the light-emitting units in the compensation area is input, the luminance output of the compensation area strictly corresponds to the image to be displayed. However, in practice, electromagnetic coupling occurs between the second connecting line and the second data line in the compensation area, resulting in a difference in luminance between the compensation area and the image to be displayed.

[0041] Since the display panel does not display the image to be displayed during the entire period of executing this method, "projecting the image to be displayed onto the display panel" is essentially to analyze the image to be displayed according to the image data encoding rules and the characteristics and control algorithms of the display device, and obtain the actual grayscale of multiple light-emitting units in the display area, and then obtain the actual grayscale of the compensation area and the actual grayscale of the target area.

[0042] S130 , determining a target compensation value of the compensation area based on the actual grayscale of the compensation area and the actual grayscale of the target area.

[0043] There are various methods for implementing this step, which are not limited in this application. In one embodiment, a functional relationship is optionally pre-established, with the target compensation value of the compensation area as a dependent variable and the actual grayscale of the compensation area and the actual grayscale of the target area as independent variables. During this step, the target compensation value of the compensation area is determined based on this functional relationship, the actual grayscale of the compensation area, and the actual grayscale of the target area.

[0044] In another embodiment, referring to FIG3 , the implementation method of this step may include the following steps.

[0045] S131, determine a target compensation table; the target compensation table includes multiple correspondences, including correspondences between the grayscale of the compensation area, the grayscale of the target area, and the compensation value; in different correspondences, the grayscale of the compensation area and / or the grayscale of the target area are different.

[0046] The target compensation table is the compensation table used when determining the target compensation value in the current execution of the data voltage compensation method. In practice, the target compensation tables used in different executions of the data voltage compensation method can be the same compensation table or different compensation tables.

[0047] Optionally, 256 levels of grayscale can be set for use in the compensation area and the target area. In one or more embodiments, a matrix grid of 256 rows × 256 columns can be used to represent the compensation table. For example, referring to Figure 4, the row direction of the matrix grid represents the different grayscale levels of the target area, and the column direction represents the different grayscale levels of the compensation area. The value stored in each grid in the matrix grid (for example, in Figure 4, only the values ​​stored in 3 grids are shown) is the compensation value corresponding to the grayscale of the compensation area corresponding to the row of the grid and the grayscale of the target area corresponding to the column. In this way, it can be ensured that in the compensation table, any corresponding relationship includes the correspondence between the grayscale of the compensation area, the grayscale of the target area, and the compensation value.

[0048] For example, in FIG4 , the compensation value in the grid filled with dots is 2V, the corresponding grayscale of the compensation area is 1, and the corresponding grayscale of the target area is 2.

[0049] S132 , determining a target compensation value of the compensation area based on the target compensation table, the actual grayscale of the compensation area, and the actual grayscale of the target area.

[0050] There are multiple methods for implementing this step, which are not limited in this application. For example, the method for implementing this step may also include: using the actual grayscale of the compensation area and the actual grayscale of the target area as indexes, searching in the target compensation table to obtain a target correspondence, wherein the grayscale of the compensation area in the target correspondence is the same as the actual grayscale of the compensation area, and the grayscale of the target area in the target correspondence is the same as the actual grayscale of the target area; using the compensation value in the target correspondence as a reference compensation value; and determining the target compensation value of the compensation area based on the reference compensation value.

[0051] For example, in a scenario where the actual grayscale of the compensation area is 3 and the actual grayscale of the target area is 4, as shown in Figure 4, the target compensation table can be found for a cell whose row corresponds to a grayscale of 3 for the compensation area and whose column corresponds to a grayscale of 4 for the target area. The value of 2.1V in this cell is the reference compensation value. Subsequently, the target compensation value for the compensation area can be determined based on the reference compensation value.

[0052] In practice, the reference compensation value may be determined as the target compensation value of the compensation zone, or the reference compensation value may be calculated to obtain the target compensation value of the compensation zone.

[0053] S140 , determining a target data voltage of the compensation area based on the target compensation value of the compensation area.

[0054] There are many ways to implement this step, which are not limited in this application. Exemplarily, the method for implementing this step may include: obtaining an initial data voltage of the compensation area based on the image to be displayed; and obtaining a target data voltage of the compensation area based on the initial data voltage of the compensation area and a target compensation value.

[0055] The initial data voltage of the compensation area may be, for example, an average value or a median value of theoretical data voltages of at least some of the light-emitting units in the compensation area.

[0056] Optionally, the sum of the initial data voltage of the compensation area and the target compensation value is used as the target data voltage of the compensation area.

[0057] Optionally, in a stage where the display panel displays an image to be displayed, a target data voltage is input to the compensation area.

[0058] The above technical solution is configured to project the image to be displayed onto the display panel to determine the actual grayscale of the compensation area and the actual grayscale of the target area; based on the actual grayscale of the compensation area and the actual grayscale of the target area, the target compensation value of the compensation area is determined; based on the target compensation value of the compensation area, the target data voltage of the compensation area is determined. The essence of the technical solution is to determine the target compensation value of the compensation area based on the actual grayscale of the compensation area and the actual grayscale of the target area, so that after compensation, the brightness value of the compensation area is close to its target brightness value, thereby making the display panel emit light more uniformly, improving the display unevenness of the display panel, and improving the display quality.

[0059] Furthermore, compared to solutions that rely solely on the actual grayscale of either the compensation area or the target area to set the compensation value, the above method considers the actual grayscale of both the compensation area and the target area and determines the target compensation value for the compensation area based on the relationship between the two, effectively optimizing the compensation process. This strategy ensures a more accurate compensation value, effectively reducing the color difference between the compensated display panel and the original image, thereby improving the overall brightness uniformity and color consistency of the displayed image.

[0060] On the basis of the above technical solution, optionally, a target compensation table is pre-set to correspond to the reference brightness; the data voltage compensation method also includes: obtaining the target brightness of the compensation area based on the image to be displayed; determining the target compensation value of the compensation area based on the reference compensation value includes: determining the target compensation value of the compensation area based on the reference brightness corresponding to the target compensation table, the target brightness of the compensation area, and the reference compensation value.

[0061] Based on this, optionally, referring to FIG5 , the data voltage compensation method includes the following steps.

[0062] S210: Acquire an image to be displayed.

[0063] S220 , projecting the image to be displayed onto the display panel, and determining the actual grayscale of the compensation area and the actual grayscale of the target area.

[0064] S230 : Acquire a target brightness of the compensation area based on the image to be displayed.

[0065] Optionally, the brightness of the image to be displayed may be used as the target brightness of the compensation area.

[0066] S240, determining a target compensation table; the target compensation table includes multiple correspondences, including correspondences between the grayscale of the compensation area, the grayscale of the target area, and the compensation value; in different correspondences, the grayscale of the compensation area and / or the grayscale of the target area are different; the target compensation table corresponds to the reference brightness.

[0067] S250. Using the actual grayscale of the compensation area and the actual grayscale of the target area as indexes, query in the target compensation table to obtain a target correspondence relationship, wherein the grayscale of the compensation area in the target correspondence relationship is the same as the actual grayscale of the compensation area, and the grayscale of the target area in the target correspondence relationship is the same as the actual grayscale of the target area.

[0068] S260: Use the compensation value in the target corresponding relationship as a reference compensation value.

[0069] S270 , determining a target compensation value of the compensation area based on the reference brightness corresponding to the target compensation table, the target brightness of the compensation area, and the reference compensation value.

[0070] The reason for setting a corresponding reference brightness for the compensation table is that, given that the actual grayscale of the compensation area and the actual grayscale of the target area are fixed values, the compensation value required to ensure that the compensation area accurately matches the brightness level of the desired image when the display panel displays images of varying brightness often varies. Therefore, setting a corresponding reference brightness for the compensation table is intended to accommodate the display requirements of images of varying brightness, allowing for precise and appropriate brightness compensation adjustments to be made to the compensation area.

[0071] Since the target compensation table corresponds to the reference brightness, the reference compensation value obtained based on the target compensation table also corresponds to the reference brightness. If the result after adding the reference compensation value to the initial data voltage is loaded into the compensation area, the brightness presented in the compensation area should be the reference brightness. However, the reference brightness is not necessarily the same as the target brightness. Therefore, the essence of S270 is to convert the reference compensation value corresponding to the reference brightness into a target compensation value corresponding to the target brightness through the "conversion" method. When the result after adding the target compensation value to the initial data voltage is loaded into the compensation area, the brightness presented in the compensation area is the target brightness, that is, the brightness of the image to be displayed.

[0072] Therefore, the above technical solution determines the target compensation value of the compensation area by setting a reference brightness corresponding to the target compensation table, the target brightness of the compensation area, and the reference compensation value, so that the obtained target compensation value can be more accurate and accurate and appropriate brightness compensation adjustment can be implemented on the compensation area.

[0073] In practice, to accommodate varying brightness requirements, multiple compensation tables can be configured, each corresponding to a specific reference brightness value. When determining a target compensation value appropriate for the current compensation zone, a compensation table whose reference brightness is the same as the target brightness, or approximately the same within the allowable error range, is selected from multiple compensation tables based on the target brightness of the compensation zone. This compensation table is then selected as the target compensation table. In this scenario, the reference compensation value retrieved from the target compensation table is directly associated with the target brightness, so this reference compensation value can be used directly as the target compensation value. However, given the wide range of brightness in actual images, this means that a corresponding compensation table must be set for each brightness. This significantly increases the number of compensation tables stored in the display device, placing higher demands on the storage performance of the display device.

[0074] The technical solution presented in Figure 5 converts the reference compensation value corresponding to the reference brightness into a target compensation value corresponding to the target brightness, rather than obtaining the target compensation value by querying a compensation table where the reference brightness is equal or approximately equal to the target brightness. This conversion method eliminates the need for numerous compensation tables and reduces the memory requirements of the display device.

[0075] Based on the above-mentioned multiple technical solutions, optionally, S240 may include: determining the current dimming mode of the display panel; the dimming mode of the display panel includes a DC dimming mode or a pulse width modulation dimming mode; obtaining a compensation table set, the compensation table set includes multiple compensation tables, among the multiple compensation tables, some compensation tables correspond to the DC dimming mode, and another part of the compensation tables corresponds to the pulse width modulation dimming mode; in the compensation table set, the compensation table corresponding to the current dimming mode is determined as the target compensation table.

[0076] Direct Current Dimming (DC Dimming) controls the brightness of a display panel by adjusting the current. Pulse Width Modulation (PWM) Dimming (PWM) adjusts the time the screen is on and off, i.e., the frequency of the screen switching between on and off, to achieve equivalent brightness control.

[0077] Research has shown that when a display panel uses different dimming modes, even if the grayscale of the compensation area and the target area remains consistent, the compensation values ​​required to achieve the same brightness performance in the compensation area will also be different. In other words, when the dimming mode changes, the correspondence between the grayscale and the compensation value recorded in the compensation table also changes. Therefore, by setting up a compensation table set to include multiple compensation tables, some of which correspond to the DC dimming mode and others to the pulse width modulation dimming mode, a corresponding compensation table is actually constructed for each mode for different dimming modes. In this way, the calculated target compensation value can be ensured to be more accurate, thereby enabling precise and appropriate brightness compensation adjustments to be made to the compensation area.

[0078] For example, referring to Figure 6 , the compensation tables in the compensation table set can be divided into two major categories. One major category contains compensation tables corresponding to DC dimming mode, while the other major category contains compensation tables corresponding to pulse-width modulation dimming mode. Each compensation table in each major category corresponds to a specific reference brightness value. Different compensation tables in the same major category correspond to different reference brightness values. The reference brightness values ​​corresponding to two compensation tables in different major categories can be the same or different.

[0079] In one or more embodiments, S270 may include determining a target compensation value of the compensation area based on a reference brightness corresponding to the target compensation table, the target brightness of the compensation area, and the reference compensation value according to a calculation strategy corresponding to the current dimming mode.

[0080] The essence of this setup is that, to ensure that the compensation zone accurately achieves the target compensation value in each dimming mode, different calculation strategies are set for each dimming mode. A "calculation strategy" can be understood as the conversion rule from the reference compensation value corresponding to the reference brightness to the target compensation value corresponding to the target brightness. One reason for setting different calculation strategies for different dimming modes is that the relationship between brightness and compensation value varies differently in different dimming modes. For example, in DC dimming mode, the relationship between brightness and compensation value is generally linear, while in pulse-width modulation dimming mode, the relationship between brightness and compensation value is generally nonlinear. Therefore, developing calculation strategies that adapt to the characteristics of each dimming mode helps to more accurately control the brightness of the compensation zone, ensuring the consistency and accuracy of the display effect.

[0081] In one or more embodiments, since the relationship between brightness and compensation value in the DC dimming mode is generally a linear transformation, optionally, if the current dimming mode is the DC dimming mode, determining the target compensation value of the compensation area according to a calculation strategy corresponding to the current dimming mode, based on the reference brightness corresponding to the target compensation table, the target brightness of the compensation area, and the reference compensation value, includes: obtaining the target compensation value C2 of the compensation area based on the following formula: C2 = k·L2;

[0082] Wherein, k=C1 / L1, wherein L2 is the target brightness, C1 is the reference compensation value, and L1 is the reference brightness.

[0083] For example, if the current dimming mode is DC dimming mode, the reference brightness L1 corresponding to the target compensation table is 500 nit, the actual grayscale of the compensation area is 1, and the actual grayscale of the target area is 2. Referring to Figure 4, by querying the target compensation table, it can be obtained that when the grayscale of the compensation area is 1 and the grayscale of the target area is 2, the corresponding compensation value is a, where a is the reference compensation value corresponding to 500 nit, and C1 is a. Based on the current image to be displayed, the target brightness of the compensation area is 200 nit, that is, L2 = 200 nit, and the target compensation value C2 of the compensation area is:

[0084] In practice, the compensation tables can be centralized, with one or more compensation tables corresponding to the DC dimming mode. Since the relationship between brightness and compensation value in DC dimming mode is typically a linear transformation, k can be obtained based on any compensation table, and k obtained from different compensation tables can be considered the same within an acceptable error range. Therefore, the number of compensation tables corresponding to the DC dimming mode can optionally be set to one. This minimizes the number of compensation tables required to be stored while still accurately obtaining the target compensation value, thereby reducing the storage requirements of the display device.

[0085] In one or more embodiments, since the relationship between brightness and compensation value in pulse width modulation dimming mode usually exhibits a nonlinear change characteristic, optionally, it is set that if the current dimming mode is pulse width modulation dimming mode; the number of target compensation tables corresponding to the pulse width modulation dimming mode is N, and based on each target compensation table, a reference compensation value can be obtained, and a total of N reference compensation values ​​are obtained; each reference compensation value corresponds to the reference brightness corresponding to the compensation table used to obtain the reference compensation value; N is a positive integer greater than or equal to 3; according to the calculation strategy corresponding to the current dimming mode, based on the reference brightness corresponding to the target compensation table, the target brightness of the compensation area, and the reference compensation value, the target compensation value of the compensation area is determined, including: constructing a rectangular coordinate system, in which one axis is brightness and the other axis is compensation value; processing the correspondence between N reference compensation values ​​and reference brightness into data points in the rectangular coordinate system, and a total of N data points are obtained; based on the N data points, fitting is performed to obtain a target curve; based on the target brightness of the compensation area and the target curve, the target compensation value of the compensation area is determined.

[0086] Optionally, based on the target brightness of the compensation area and the target curve, the target compensation value of the compensation area is determined, including: determining the target data point in the target curve, the brightness axis coordinate of the target data point is the target brightness; and using the compensation value coordinate of the target data point as the target compensation value.

[0087] For example, if the current dimming mode is pulse width modulation (PWM), three target compensation tables are defined: target compensation table 1, target compensation table 2, and target compensation table 3. The reference brightness corresponding to target compensation table 1 is 500 nits, the reference brightness corresponding to target compensation table 2 is 250 nits, and the reference brightness corresponding to target compensation table 3 is 100 nits. For an image to be displayed, the target brightness of the compensation area is 200 nits, the actual grayscale of the compensation area is 1, and the actual grayscale of the target area is 2. By querying target compensation table 1, it is found that when the grayscale of the compensation area is 1 and the grayscale of the target area is 2, the corresponding compensation value is b, where b is the reference compensation value corresponding to 500 nits. By querying target compensation table 2, it is found that when the grayscale of the compensation area is 1 and the grayscale of the target area is 2, the corresponding compensation value is c, where c is the reference compensation value corresponding to 250 nits. By querying target compensation table 3, it is found that when the grayscale of the compensation area is 1 and the grayscale of the target area is 2, the corresponding compensation value is d, where d is the reference compensation value corresponding to 100 nits. Referring to Figure 7 , a rectangular coordinate system is constructed, in which the vertical axis represents brightness and the horizontal axis represents compensation value. Three data points are determined in this rectangular coordinate system, with coordinates of (b, 500), (c, 250), and (d, 100). Curve fitting is performed based on these three data points, and the resulting curve is the target curve L. Since the target brightness of the compensation area is 200 nits, a data point with a vertical coordinate of 200 nits is found in target curve L. The horizontal coordinate of this data point with a vertical coordinate of 200 nits is the target compensation value.

[0088] In practice, the compensation tables can be centralized, with the number of compensation tables corresponding to the pulse width modulation dimming mode being three or more. In fact, a greater number of compensation tables corresponding to the pulse width modulation dimming mode means a greater number of reference compensation values ​​that can be obtained, a more precise target curve obtained by fitting, and a more accurate target compensation value. However, a greater number of compensation tables corresponding to the pulse width modulation dimming mode also means a greater number of compensation tables that need to be stored in the electronic device, and a higher storage performance requirement for the display device.

[0089] Based on the above-mentioned multiple technical solutions, the present application also provides a method for constructing a compensation table. Referring to FIG8 , the method for constructing the compensation table includes the following steps.

[0090] S310 . During a test phase of the display panel, control the display panel to be in a target dimming mode; the target dimming mode is a DC dimming mode or a pulse width modulation dimming mode.

[0091] In the display panel production process, the testing phase occurs immediately after manufacturing is completed. Before the display panel is assembled into a display device and released to the market, testing should be initiated to ensure that the display panel's performance meets the requirements.

[0092] The target dimming mode is one of a DC dimming mode and a pulse width modulation dimming mode. This step is determined based on the relationship between the compensation table currently desired to be constructed and the dimming mode. If the target dimming mode is a DC dimming mode, the target dimming mode is set to the DC dimming mode.

[0093] S320 , controlling the display panel to display a test image, wherein the brightness value of the test image is a first brightness value.

[0094] Test images are preset images used to construct compensation tables.

[0095] S330 , adjusting the input voltage of the first data line and the input voltage of the second data line to obtain a plurality of first corresponding relationships; the first corresponding relationships include corresponding relationships among the grayscale of the compensation area, the grayscale of the target area, and the compensation value.

[0096] There are many methods for implementing this step, which are not limited in this application. For example, the method for implementing this step includes: setting M = 0 and P = 0, and periodically performing the following steps until M = 256: adjusting the input voltage of the first data line so that the grayscale of the target area is M; adjusting the input voltage of the second data line until the grayscale of the compensation area is P, and using the voltage value on the second data line when the grayscale of the compensation area is P as the first voltage value; adjusting the input voltage of the second data line until the brightness value of the compensation area is equal to the first brightness value, and using the voltage value on the second data line when the brightness value of the compensation area is equal to the first brightness value as the second voltage value; obtaining a compensation value Q based on the first voltage value and the second voltage value; establishing a correspondence between the grayscale M of the target area, the grayscale P of the compensation area, and the compensation value Q; updating P so that the difference between the updated P and the pre-update P is 1; determining whether the updated P is equal to 256; if the updated P is equal to 256, updating M, and then updating P again so that the difference between the updated M and the pre-update M is 1, and the updated P = 0.

[0097] S340: Process the multiple first correspondences into a compensation table, and establish a correspondence between the compensation table, the first brightness value, and the target dimming mode.

[0098] For example, if it is desired to construct a compensation table corresponding to the DC dimming mode and having a reference brightness of 500 nit, the display panel is controlled to be in the DC dimming mode, and the display panel displays a test image with a brightness of 500 nit.

[0099] Referring to Figure 1, adjust the input voltage of the first data line 1 so that the grayscale of the target area is 0, and adjust the input voltage of the second data line 2 so that the grayscale of the compensation area is 0. At this time, the average value (or median value) of the second data line 2 in the compensation area is V1, that is, the first voltage value is V1. Adjust the input voltage of the second data line 2 again so that the brightness of the compensation area is equal to 500 nit. At this time, the average value (or median value) of the second data line 2 in the compensation area is V2, that is, the second voltage value is V2. The difference between V2 and V1 is used as the compensation value Q. In this way, a corresponding relationship can be obtained. In this corresponding relationship, the grayscale of the target area is 0, the grayscale of the compensation area is 0, and the compensation value is the difference between V2 and V1.

[0100] Thus, by continuously adjusting the input voltage of the first data line 1, the grayscale of the target area traverses 0-255, and by continuously adjusting the input voltage of the second data line 2, the grayscale of the compensation area traverses 0-255, and 255×255 corresponding relationships will be obtained.

[0101] The 255×255 corresponding relationships are processed into a compensation table, and the reference brightness corresponding to the compensation table is 500 nit.

[0102] The above technical solution provides a method for constructing a compensation table. This method allows the compensation table to correspond to both the reference brightness and the dimming mode. This ensures that the target compensation value subsequently obtained based on the compensation table is accurate, which helps improve the uniformity of image display on the display panel.

[0103] In one or more embodiments, for the aforementioned multiple method embodiments, for simplicity of description, they are all expressed as a series of action combinations, but this application is not limited to the order of the actions described, because according to this application, some steps can be performed in other orders or simultaneously. Secondly, the embodiments described in this specification are all optional embodiments, and the actions and modules involved are not necessarily required by this application.

[0104] Figure 9 is a block diagram of a data voltage compensation device proposed in an embodiment of the present application. As shown in Figure 9, the data voltage compensation device is applied to a display panel, the display panel including a display area, the display area including a target area and a compensation area; the display panel also including a first data line, a second data line, and a fan-out line; the fan-out line including a first connecting line and a second connecting line; the first connecting line and the second connecting line extending in intersecting directions, one end of the first connecting line connected to the first data line and the other end connected to the second connecting line; the first data line passing through the target area; the second connecting line and the second data line passing through the compensation area; in the compensation area, the second connecting line extending parallel to the second data line. The data voltage compensation device includes the following modules.

[0105] An acquisition module 510 is configured to acquire an image to be displayed;

[0106] A first determining module 520 is configured to project the image to be displayed onto the display panel and determine an actual grayscale of the compensation area and an actual grayscale of the target area;

[0107] A second determining module 530 is configured to determine a target compensation value of the compensation area based on the actual grayscale of the compensation area and the actual grayscale of the target area;

[0108] The third determining module 540 is configured to determine a target data voltage of the compensation area based on the target compensation value of the compensation area.

[0109] The apparatuses of the above embodiments can implement the processes of the methods of the above multiple method embodiments and have the same or corresponding effects.

[0110] FIG10 is a schematic diagram of a display device provided in an embodiment of the present application. Referring to FIG10 , the display device 200 includes any one of the data voltage compensation devices provided in an embodiment of the present application.

[0111] In one or more embodiments, the display device provided in the embodiments of the present application may be a computer, a mobile phone, a tablet, or other display device with a display function.

[0112] The display device provided in the embodiment of the present application has the same or similar effects as the data voltage compensation method provided in the embodiment of the present application. The description of the data voltage compensation method in the above multiple embodiments may be referred to, and will not be repeated in this embodiment.

Claims

1. A data voltage compensation method, wherein: The data voltage compensation method is applied to a display panel, wherein the display panel includes a display area, the display area including a target area and a compensation area; the display panel also includes a first data line, a second data line, and a fan-out line; the fan-out line includes a first connecting line and a second connecting line; the first connecting line and the second connecting line extend in directions intersecting, one end of the first connecting line is connected to the first data line, and the other end of the first connecting line is connected to the second connecting line; the first data line passes through the target area; and the second connecting line and the second data line pass through the compensation area; In the compensation area, the second connection line is parallel to an extension direction of the second data line, and the method includes: Get the image to be displayed; Projecting the image to be displayed onto the display panel, and determining an actual grayscale of the compensation area and an actual grayscale of the target area; determining a target compensation value of the compensation area based on the actual grayscale of the compensation area and the actual grayscale of the target area; A target data voltage of the compensation area is determined based on the target compensation value of the compensation area.

2. The method according to claim 1, wherein The determining the target compensation value of the compensation area based on the actual grayscale of the compensation area and the actual grayscale of the target area includes: Determining a target compensation table; wherein the target compensation table includes a plurality of correspondences, each correspondence including a correspondence between the grayscale of the compensation area, the grayscale of the target area, and the compensation value; in different correspondences, at least one of the grayscale of the compensation area or the grayscale of the target area is different; A target compensation value of the compensation area is determined based on the target compensation table, the actual grayscale of the compensation area, and the actual grayscale of the target area.

3. The method according to claim 2, wherein: The determining the target compensation value of the compensation area based on the target compensation table, the actual grayscale of the compensation area, and the actual grayscale of the target area includes: Using the actual grayscale of the compensation area and the actual grayscale of the target area as indexes, searching in the target compensation table to obtain a target correspondence, wherein the grayscale of the compensation area in the target correspondence is the same as the actual grayscale of the compensation area, and the grayscale of the target area in the target correspondence is the same as the actual grayscale of the target area; Using the compensation value in the target corresponding relationship as a reference compensation value; Based on the reference compensation value, a target compensation value of the compensation zone is determined.

4. The method according to claim 3, wherein: The target compensation table corresponds to the reference brightness; the method further includes: acquiring a target brightness of the compensation area based on the image to be displayed; The determining the target compensation value of the compensation area based on the reference compensation value includes: A target compensation value of the compensation area is determined based on a reference brightness corresponding to the target compensation table, the target brightness of the compensation area, and the reference compensation value.

5. The method according to claim 4, wherein The determining of the target compensation table includes: Determining a current dimming mode of the display panel; wherein the dimming mode of the display panel includes a direct current dimming mode or a pulse width modulation dimming mode; Acquire a compensation table set, wherein the compensation table set includes a plurality of compensation tables, a portion of the plurality of compensation tables corresponds to the DC dimming mode, and another portion of the plurality of compensation tables corresponds to the pulse width modulation dimming mode; The compensation tables are concentrated, and the compensation table corresponding to the current dimming mode is determined as the target compensation table.

6. The method according to claim 5, wherein: The determining the target compensation value of the compensation area based on the reference brightness corresponding to the target compensation table, the target brightness of the compensation area, and the reference compensation value includes: According to a calculation strategy corresponding to the current dimming mode, a target compensation value of the compensation area is determined based on a reference brightness corresponding to the target compensation table, the target brightness of the compensation area, and the reference compensation value.

7. The method according to claim 6, wherein: When the current dimming mode is the DC dimming mode, determining the target compensation value of the compensation area according to the calculation strategy corresponding to the current dimming mode, based on the reference brightness corresponding to the target compensation table, the target brightness of the compensation area, and the reference compensation value, includes: Based on the following formula, the target compensation value C2 of the compensation area is obtained: C2=k·L2; Wherein, k=C1 / L1, wherein L2 is the target brightness, C1 is the reference compensation value, and L1 is the reference brightness.

8. The method according to claim 6, wherein: When the current dimming mode is the pulse width modulation dimming mode, the number of target compensation tables corresponding to the pulse width modulation dimming mode is N, and a reference compensation value can be obtained based on each target compensation table, so that a total of N reference compensation values ​​are obtained; Each reference compensation value corresponds to a reference brightness corresponding to the compensation table used to obtain the reference compensation value; N is a positive integer greater than or equal to 3; The calculation strategy corresponding to the current dimming mode is based on the target compensation table. The method further comprises: determining a target compensation value of the compensation area based on the corresponding reference brightness, the target brightness of the compensation area, and the reference compensation value, comprising: Constructing a rectangular coordinate system in which one axis is brightness and the other axis is compensation value; Processing the correspondence between the N reference compensation values ​​and the reference brightness into data points in the rectangular coordinate system, to obtain a total of N data points; Based on the N data points, fitting is performed to obtain a target curve; A target compensation value of the compensation area is determined based on the target brightness of the compensation area and the target curve.

9. The method according to claim 8, wherein The determining the target compensation value of the compensation area based on the target brightness of the compensation area and the target curve includes: In the target curve, a target data point is determined, and the brightness axis coordinate of the target data point is the target brightness; The compensation value coordinates of the target data point are used as the target compensation value.

10. The method according to claim 5, wherein The construction of the compensation table includes: During the test phase of the display panel, the display panel is controlled to be in a target dimming mode; wherein the target dimming mode is a DC dimming mode or a pulse width modulation dimming mode; Controlling the display panel to display a test image, wherein the brightness value of the test image is a first brightness value; Adjusting the input voltage of the first data line and the input voltage of the second data line to obtain a plurality of first corresponding relationships, each of which includes a corresponding relationship between the grayscale of the compensation area, the grayscale of the target area, and the compensation value; The plurality of first correspondences are processed into the compensation table, and a correspondence between the compensation table, the first brightness value, and the target dimming mode is established.

11. The method according to claim 10, wherein: The adjusting the input voltage of the first data line and the input voltage of the second data line to obtain a plurality of first corresponding relationships includes: Let M = 0, P = 0, and periodically perform the following steps until M = 256: Adjusting the input voltage of the first data line so that the grayscale of the target area is M; adjusting the input voltage of the second data line until the grayscale of the compensation area is P, and taking the voltage value on the second data line when the grayscale of the compensation area is P as the first voltage value; Adjust the input voltage of the second data line until the brightness value of the compensation area is equal to the first brightness value. When the brightness value of the compensation area is equal to the first brightness value, the second data line The voltage value on the line is used as the second voltage value; Obtaining a compensation value Q based on the first voltage value and the second voltage value; Establishing a correspondence between the grayscale M of the target area, the grayscale P of the compensation area, and the compensation value Q; Update P so that the difference between the updated P and the pre-update P is 1; Determine whether the updated P is equal to 256; When the updated P is equal to 256, M is updated, and P is updated again, so that the difference between the updated M and the pre-update M is 1, and the updated P=0.

12. The method according to claim 1, wherein The determining the target data voltage of the compensation area based on the target compensation value of the compensation area includes: obtaining an initial data voltage of the compensation area based on the image to be displayed; A target data voltage of the compensation area is obtained based on the initial data voltage of the compensation area and the target compensation value.

13. The method according to claim 1, further comprising: In a stage where the display panel displays the image to be displayed, the target data voltage is input to the compensation area.

14. The method according to claim 1, further comprising: Acquire an image of the display panel; wherein the image of the display panel includes the first data line, the second data line, and a fan-out line connected to the first data line; The target area and the compensation area are determined in the display panel according to a layout of the first data line, the second data line, and the fan-out line in an image of the display panel.

15. A data voltage compensation device, wherein: The data voltage compensation device is applied to a display panel, the display panel including a display area, the display area including a target area and a compensation area; the display panel also including a first data line, a second data line, and a fan-out line; the fan-out line includes a first connecting line and a second connecting line; the first connecting line and the second connecting line extend in directions intersecting, one end of the first connecting line is connected to the first data line, and the other end of the first connecting line is connected to the second connecting line; the first data line passes through the target area; and the second connecting line and the second data line pass through the compensation area; In the compensation area, the second connecting line is parallel to the extending direction of the second data line, and the data voltage compensation device includes: An acquisition module, configured to acquire an image to be displayed; The first determining module is configured to project the image to be displayed onto the display panel and determine the The actual grayscale of the compensation area and the actual grayscale of the target area; a second determining module configured to determine a target compensation value of the compensation area based on the actual grayscale of the compensation area and the actual grayscale of the target area; The third determining module is configured to determine a target data voltage of the compensation area based on the target compensation value of the compensation area. 16 . A display device comprising the data voltage compensation device according to claim 15 .

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