Method for generating target data voltage and device and display panel thereof

Abstract

The application provides a target data voltage generation method and device and a display panel. The method comprises the following steps: obtaining at least one to-be-compensated area, each to-be-compensated area comprising a corresponding abnormal area, a plurality of to-be-compensated pixel units in each to-be-compensated area comprising a plurality of first to-be-compensated pixel units, and adjusting an initial data voltage of the first to-be-compensated pixel units of the to-be-compensated area at a binding point gray scale value to determine a corresponding first binding point target data voltage, thereby improving the accuracy of the brightness compensation of the abnormal area.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display, in particular to the manufacturing of display device, and more particularly to a method for generating target data voltage and a device thereof and a display panel. BACKGROUND

[0002] The LCD (Liquid Crystal Display) panel is a display mainly composed of liquid crystal molecules, which has the characteristics of high brightness, large viewing angle, rich color, etc.

[0003] In the LCD panel made by thin film transistor technology, due to the process and other reasons, the display picture may have uneven brightness. The area with uneven brightness is regarded as a mura area. For the point mura and line mura, since the size of the mura area is small, the existing demura algorithm cannot be refined to a small size area, so the point mura and line mura cannot be effectively improved, which reduces the quality of the display picture.

[0004] Therefore, the point mura and line mura phenomenon in the existing LCD panel is still serious, and needs to be improved. SUMMARY

[0005] The present application aims to provide a method for generating target data voltage and a device thereof and a display panel, to improve the technical problem that the point mura and line mura phenomenon in the existing LCD panel is serious.

[0006] The present application provides a method for generating target data voltage, comprising:

[0007] Obtaining at least one abnormal area of a display panel to be compensated, the average brightness value of each abnormal area and the area of the display panel to be compensated except for the multiple abnormal areas at the same gray scale value is different;

[0008] Determining at least one to-be-compensated area corresponding to the at least one abnormal area, each to-be-compensated area includes the corresponding abnormal area, and multiple to-be-compensated pixel units in each to-be-compensated area include multiple first to-be-compensated pixel units;

[0009] Adjusting the initial data voltage of the first to-be-compensated pixel unit of the to-be-compensated area at the bind point gray scale value to determine the corresponding first bind point target data voltage.

[0010] In an embodiment, the number of the abnormal regions is greater than 1, the shapes of the plurality of the to-be-compensated regions are the same, the number of the first to-be-compensated pixel units in each of the to-be-compensated regions is the same, and the relative positions between the plurality of the first to-be-compensated pixel units in each of the to-be-compensated regions are the same.

[0011] The step of obtaining at least one abnormal region of the to-be-compensated display panel comprises:

[0012] The plurality of the abnormal regions of the to-be-compensated display panel are obtained.

[0013] In an embodiment, the area of the overlapping region of any two of the to-be-compensated regions is 0.

[0014] In an embodiment, the tie point gray scale values of each of the to-be-compensated regions are the same.

[0015] In an embodiment, the plurality of the to-be-compensated pixel units further comprise a plurality of second to-be-compensated pixel units.

[0016] After the step of adjusting the initial data voltage of the first to-be-compensated pixel unit of the to-be-compensated region at the tie point gray scale value to determine the corresponding first tie point target data voltage, the step comprises:

[0017] According to the plurality of the first tie point target data voltages, the relative positions of the second to-be-compensated pixel unit and the plurality of the first to-be-compensated pixel units, the second tie point target data voltage of the second to-be-compensated pixel unit at the tie point gray scale value is determined.

[0018] In an embodiment, the plurality of gray scale values comprise the plurality of the tie point gray scale values, a plurality of non-tie point gray scale values.

[0019] After the step of adjusting the initial data voltage of the first to-be-compensated pixel unit of the to-be-compensated region at the tie point gray scale value to determine the corresponding first tie point target data voltage, the step comprises:

[0020] According to the plurality of the first tie point target data voltages, the relative sizes of the non-tie point gray scale value and the plurality of the tie point gray scale values, the first non-tie point target data voltage of the first to-be-compensated pixel unit at the non-tie point gray scale value is determined.

[0021] In an embodiment, each of the to-be-compensated pixel units comprises a plurality of to-be-compensated sub-pixels, and each of the first tie point target data voltages comprises a plurality of first tie point target sub-data voltages corresponding to the plurality of the to-be-compensated sub-pixels.

[0022] The application further provides a to-be-compensated display panel, comprising:

[0023] a memory for storing instructions;

[0024] a controller configured to perform the method of generating a target data voltage according to any one of the preceding method.

[0025] In an embodiment, the controller is further configured to drive the corresponding first to-be-compensated pixel units to emit light according to the first bind point target data voltage.

[0026] The present application also provides a device for generating a target data voltage, configured to perform the method of generating a target data voltage according to any one of the preceding method.

[0027] The present application provides a method of generating a target data voltage and a device and a display panel thereof. The method comprises the following steps: obtaining a plurality of abnormal areas of a to-be-compensated display panel, wherein the average brightness value of each abnormal area and a region other than the plurality of abnormal areas of the to-be-compensated display panel at the same gray scale value is different; determining a plurality of to-be-compensated regions corresponding to the plurality of abnormal areas, wherein each to-be-compensated region comprises the corresponding abnormal area, and a plurality of to-be-compensated pixel units in each to-be-compensated region comprise a plurality of first to-be-compensated pixel units; adjusting the initial data voltage of the first to-be-compensated pixel units of the to-be-compensated region at a bind point gray scale value to determine a first bind point target data voltage, thereby avoiding occupying a large amount of memory and improving the accuracy of the brightness compensation of the abnormal area. BRIEF DESCRIPTION OF DRAWINGS

[0028] The present application will be further described below with reference to the accompanying drawings. It should be noted that the accompanying drawings in the following description are only used to explain some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort on the basis of these drawings.

[0029] Figure 1 、 Figure 3 and Figure 4 are four flowcharts of the method of generating a target data voltage provided by an embodiment of the present application.

[0030] Figure 2 is a distribution diagram of a plurality of to-be-compensated regions in a to-be-compensated display panel provided by an embodiment of the present application.

[0031] Figure 5 is an architecture diagram of a to-be-compensated display panel provided by an embodiment of the present application. DETAILED DESCRIPTION

[0032] With reference to the drawings and the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative work fall within the scope of the present application.

[0033] In the description of the present application, the terms "first", "second", and the like are used only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In addition, it should be noted that the drawings provided are only the structures closely related to the present application, and some details not closely related to the present application are omitted, the purpose is to simplify the drawings, make the invention point clear at a glance, and not to indicate that the actual device is exactly the same as the drawings, and is not set as a limitation on the actual device. Figure 1

[0034] In this paper, the phrase "embodiment" means that the specific features, structures or properties described in conjunction with the embodiment can be included in at least one embodiment of the present application. The phrase appears at various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment to other embodiments. A person skilled in the art explicitly and implicitly understands that the embodiments described herein can be combined with other embodiments.

[0035] The present application provides a method for generating a target data voltage, and the method includes but is not limited to the following embodiments and combinations of the following embodiments.

[0036] In an embodiment, as shown in Figure 1 The method for generating a target data voltage includes but is not limited to the following steps and combinations of the following steps.

[0037] S1, acquiring at least one abnormal area of a display panel to be compensated, each of the abnormal areas and the area of the display panel to be compensated except the abnormal areas has different average brightness values at the same gray scale value.

[0038] ​The display panel to be compensated in the embodiment can include at least one of a liquid crystal display panel, an organic self-luminous display panel, and an inorganic self-luminous display panel. Due to a process or the like, the display panel to be compensated can have a non-uniform brightness, and the area with non-uniform brightness is regarded as a mura area. For a point mura and a line mura, the size of the mura area is small, and the existing demura algorithm cannot be refined to the small area, so that the point mura and the line mura cannot be effectively improved, and the quality of the display panel is reduced.

[0039] Specifically, the abnormal area can be obtained by observing the display panel to be compensated with the naked eye or by measuring the display panel to be compensated with an instrument. The abnormal area can be regarded as the mura area. An area of the display panel to be compensated except the abnormal area can be regarded as a non-abnormal area. In different display panels, there is always an area with a large difference in brightness from the surrounding area, for example, in a pure color panel, if some areas are dark or light, these areas can be regarded as abnormal areas. As described above, the average brightness of each abnormal area is different from the average brightness of the non-abnormal area, regardless of whether the size of the abnormal area and the non-abnormal area is the same (i.e., whether the number of pixel units is equal). The average brightness can be understood as the total brightness of the abnormal area or the non-abnormal area divided by the number of pixel units.

[0040] S2, determining at least one to-be-compensated area corresponding to the at least one abnormal area. Each to-be-compensated area includes the corresponding abnormal area, and a plurality of to-be-compensated pixel units in each to-be-compensated area include a plurality of first to-be-compensated pixel units.

[0041] As described above, the shape of the abnormal area can be irregular, and the corresponding to-be-compensated area can be determined according to the position and size of the abnormal area. The specific shape and size of the to-be-compensated area are not limited. The sizes of the to-be-compensated areas can be the same or different, as long as the to-be-compensated areas can cover the corresponding abnormal areas. For ease of description, the shape of the to-be-compensated area is taken as a rectangle. That is, each rectangular to-be-compensated area corresponds to an abnormal area.

[0042] Specifically, the shape of the to-be-compensated area can be approximately the same as the shape of the corresponding abnormal area, for example Figure 2 As shown, if the abnormal area is a point mura, the length and the width of the compensation area can be approximately the same, for example, A1 and A2 in the figure. If the abnormal area is a line mura, the length of the compensation area can be much larger than the width, for example, A3, A4, and A5 in the figure. Even the width of the compensation area can be equal to one pixel unit.

[0043] Further, to reduce the storage space, the number of the to-be-compensated regions can be set to be less. For example, when the number of the abnormal regions is large, at least two abnormal regions can correspond to one to-be-compensated region, that is, at least one to-be-compensated region can cover at least two abnormal regions. For example, the number of the to-be-compensated regions can be equal to 10, and the size of the to-be-compensated region can be, but is not limited to, 9*9, 7680*10 or 100*4320, wherein the unit is the number of pixel units.

[0044] S3, adjusting the initial data voltage of the first to-be-compensated pixel unit of the to-be-compensated region at the binding point gray scale value to determine the corresponding first binding point target data voltage.

[0045] Specifically, based on a plurality of standard luminance values of each first pixel unit of a standard region at a plurality of binding point gray scale values, a plurality of initial data voltages of a first to-be-compensated pixel unit corresponding to the first pixel unit of the to-be-compensated region at a plurality of binding point gray scale values can be adjusted to determine a plurality of first binding point target data voltages, the number and distribution of the pixel units of the standard region are the same as the number and distribution of the pixel units of the to-be-compensated region, the plurality of pixel units in the standard region include at least the first pixel unit, and the plurality of pixel units in the to-be-compensated region include at least the first to-be-compensated pixel unit corresponding to at least the first pixel unit.

[0046] The standard region can be a region in a standard display panel, each to-be-compensated region can correspond to a standard region with the same size in the standard display panel, the luminance standards of a plurality of standard regions in the standard display panel can be the same, that is, the luminance of each pixel unit of each standard region at the same gray scale value in the plurality of standard regions can be the same. The size of the to-be-compensated region is the same as the size of the corresponding standard region, and the relative positions of the plurality of first pixel units in each standard region are the same as the relative positions of the plurality of first to-be-compensated pixel units in the corresponding to-be-compensated region, respectively.

[0047] In particular, the number of the first pixel units in each standard region can be the same, i.e., the number of the first to-be-compensated pixel units in each to-be-compensated region can be the same. For example, the number of the first pixel units (i.e., the number of the first to-be-compensated pixel units) can be m*n, m and n are positive integers, and it can be understood that m first pixel units (i.e., m first to-be-compensated pixel units) and n first pixel units (i.e., n first to-be-compensated pixel units) can be arranged in the row direction and the column direction, respectively. Here, m=n=9 can be taken as an example, i.e., each standard region can have 9*9 groups of standard luminance values at each gray value, and each group of standard luminance values corresponds to one first pixel unit (i.e., one first to-be-compensated pixel unit).

[0048] The binding point gray value can be a plurality of gray values selected from the plurality of gray values and arranged at intervals, i.e., here, only the plurality of standard luminance values of each first pixel unit at the plurality of binding point gray values can be obtained, and all standard luminance values of each first pixel unit at all gray values do not need to be obtained. In combination with the above description, if the number of the binding point gray values is i, each group of standard luminance values can include i standard luminance values corresponding to i binding point gray values, i.e., the number of the first binding point target data voltages can be equal to i*m*n.

[0049] Specifically, the execution subject of step S3 is not limited here, and the determination of the plurality of first binding point target data voltages can be performed by the to-be-compensated display panel itself or other devices, but the plurality of first binding point target data voltages can be stored in the to-be-compensated display panel. For the to-be-compensated display panel, the following steps can be further performed based on step S3:

[0050] S31, obtaining the gray value and position of the pixel unit in the to-be-compensated display panel, and determining the target data voltage corresponding to the pixel unit according to the relationship between the gray value of each pixel unit and the plurality of binding point gray values, the position of the pixel unit (the relationship with the position of the plurality of first to-be-compensated pixel units), and the plurality of first binding point target data voltages.

[0051] As described above, through step S3, the plurality of initial data voltages of each first to-be-compensated pixel unit in the to-be-compensated region at the plurality of binding point gray values, and the plurality of first binding point target data voltages respectively meeting the plurality of standard luminance values can be determined; however, the data voltage of each first to-be-compensated pixel unit at other gray values whether meeting the standard luminance value, and the data voltage of other pixel units (which can be referred to as second to-be-compensated pixel units) at any gray value whether meeting the standard luminance value are unknown.

[0052] Further, for each first to-be-compensated pixel unit, due to the interval arrangement of the plurality of binding point gray scale values, the first non-binding point target data voltage (corresponding to the standard brightness) of the first to-be-compensated pixel unit at other non-binding point gray scale values is determined according to the corresponding plurality of first binding point targets.

[0053] Similarly, based on the plurality of first binding point targets, the plurality of second binding point target data voltages of the second to-be-compensated pixel unit at the plurality of binding point gray scale values can also be determined, and based on the plurality of first non-binding point targets, the plurality of second non-binding point target data voltages of the second to-be-compensated pixel unit at the plurality of other non-binding point gray scale values (corresponding to the standard brightness) can also be determined.

[0054] It can be understood that the plurality of to-be-compensated regions in the embodiment are determined according to the positions and sizes of the abnormal regions, and are not divided according to a preset rule, that is, the post-determined target data voltage at least corresponds to the pixel units of the abnormal region, that is, the target data voltage has high practicability in the mura compensation of the to-be-compensated display panel, and can take into account avoiding occupying a large memory and high compensation accuracy; and the number and distribution of the plurality of first to-be-compensated pixel units of each to-be-compensated region are the same as the number and distribution of the plurality of first pixel units of the corresponding standard region, so that the positions of the first to-be-compensated pixel units corresponding to each binding point target data voltage in the to-be-compensated region and the positions of the corresponding first pixel units in the standard region are the same, to further improve the accuracy of the plurality of target data voltages finally determined.

[0055] Further, each of the to-be-compensated pixel units includes a plurality of to-be-compensated sub-pixels, and each of the first binding point target data voltages includes a plurality of first binding point target sub-data voltages corresponding to the plurality of to-be-compensated sub-pixels. Here, for the convenience of description, the first pixel units in the standard region and the first to-be-compensated pixel units in the to-be-compensated region are collectively referred to as pixel units, and each pixel unit can include a plurality of (for example, 3) sub-pixels.

[0056] Therefore, each first binding point target data voltage includes a plurality of first binding point target sub-data voltages corresponding to a plurality of sub-pixels, each standard brightness value can also include a plurality of standard sub-brightness values corresponding to a plurality of corresponding sub-pixels, and each initial data voltage also includes a plurality of initial sub-data voltages corresponding to a plurality of corresponding sub-pixels. Wherein, the initial sub-data voltage of each sub-pixel after adjustment can obtain the corresponding first binding point target sub-data voltage, and the first binding point target sub-data voltage satisfies that the brightness value of the sub-pixel under the action of the target sub-data voltage is equal to the corresponding standard sub-brightness value.

[0057] Specifically, if the number of the binding point gray scale values of each sub-pixel in each first to-be-compensated pixel unit is p (for example, p = 5, and the gray scale values can take each positive integer from 0 to 255, and the corresponding five binding point gray scale values can be 16, 25, 60, 128, and 224), and each pixel unit can include, but is not limited to, three sub-pixels of an R sub-pixel, a G sub-pixel, and a B sub-pixel, and the number of the to-be-compensated regions is k, the total number of the first binding point target data voltages in each to-be-compensated region can be k*m 2 *p*3.

[0058] Specifically, the embodiment can also be applied to a spliced screen. For two sub-screens arranged by splicing in the spliced screen, each can be defined as a to-be-compensated region herein, that is, for the spliced screen, there are two to-be-compensated regions, and the size of each to-be-compensated region needs to be the same as the size of the corresponding sub-screen. Similarly, the plurality of first binding point target data voltages of the two to-be-compensated regions can also be determined based on the corresponding standard regions of the same size.

[0059] In an embodiment, the number of the abnormal regions is greater than 1, the shapes of the plurality of to-be-compensated regions are the same, the number of the first to-be-compensated pixel units in each to-be-compensated region is the same, and the relative positions of the plurality of first to-be-compensated pixel units in each to-be-compensated region are the same. Correspondingly, step S1 can also be understood as "obtaining a plurality of abnormal regions of a to-be-compensated display panel". Specifically, as shown in Figure 2 The distribution diagram of the plurality of to-be-compensated regions (including but not limited to A1 to A5) in the to-be-compensated display panel 100 can be obtained. Each to-be-compensated region can be arranged along a first direction D1 and a second direction D2. The plurality of first to-be-compensated pixel units 10 in each to-be-compensated region can be arranged along the first direction D1 and the second direction D2. As discussed above, in each to-be-compensated region, the number of the first to-be-compensated pixel units 10 arranged along the first direction D1 can be equal. Each to-be-compensated region can include m groups of pixel units arranged along the first direction D1. Each group of pixel units can include n first to-be-compensated pixel units 10 arranged along the second direction D2. If the first direction D1 and the second direction D2 are the row direction and the column direction respectively, it can be considered that each to-be-compensated region can include m columns of first to-be-compensated pixel units 10 and n rows of first to-be-compensated pixel units 10.

[0060] It should be noted that the sizes (i.e., the number of multiple pixel units) of multiple regions to be compensated (including but not limited to A1 to A5) can be different. However, considering that the number of first pixel units 10 to be compensated in regions of different sizes can be the same, the distribution of the first pixel units 10 to be compensated in different directions can be the same (for example, the number of first pixel units 10 to be compensated in the first direction D1 and the second direction D2 can be m and n, respectively). This makes the relative position of each first pixel unit 10 to be compensated in the corresponding region to be compensated consistent. That is, the relative positional relationship between multiple first units to be compensated in each region to be compensated is the same. This makes the spatial distribution of the multiple sets of standard brightness values ​​(corresponding to multiple first units to be compensated) in each region to be compensated consistent, further improving the uniformity of the display image of the target to be compensated.

[0061] For example Figure 2 Compared to A1 and A3, which have smaller dimensions along the first direction D1, the density of the first pixel units 10 to be compensated arranged along the first direction D1 can be smaller in the former of A2, A4, and A5, which have larger dimensions along the first direction D1. Similarly, compared to A1, A2, A4, and A5, which have smaller dimensions along the second direction D2, the density of the first pixel units 10 to be compensated arranged along the second direction D2 can be smaller in the former of A3, which has larger dimensions along the second direction D2.

[0062] Among them, such as Figure 2 As shown, if the spans of the two adjacent anomalous regions (including but not limited to A1 to A5) are large and their spans overlap, the two regions to be compensated may overlap (e.g., A3 and A4) to cover the corresponding anomalous regions separately. In this case, due to the different shapes and sizes of the two regions to be compensated, the calculated results of the target data voltage of the second pixel unit to be compensated in the overlapping area will differ. Therefore, multiple regions to be compensated can be reasonably divided according to the distribution of all anomalous regions, so that the area of ​​the overlapping region between any two regions to be compensated is 0, thus avoiding the situation where the second pixel unit to be compensated corresponds to two target data voltages.

[0063] In one embodiment, such as Figure 2As shown, the bind point gray scale value of each of the to-be-compensated region (including but not limited to any one of A1 to A5) is the same. That is, for each first pixel unit in each standard region, further for each sub-pixel in each first pixel unit, based on a corresponding set of standard brightness, the initial data voltage of the corresponding sub-pixel in the corresponding first to-be-compensated pixel unit in the to-be-compensated region can be adjusted to change its brightness with the same set of bind point gray scale values (including a plurality of the above bind point gray scale values) as the reference, until the brightness is the same as the corresponding standard brightness. At this time, the data voltage is referred to as the first bind point sub-target data voltage of the sub-pixel. Similarly, a plurality of first bind point sub-target data voltages corresponding to a plurality of sub-pixels of the first to-be-compensated pixel unit can be adjusted respectively to determine a first bind point target data voltage corresponding to the first to-be-compensated pixel unit.

[0064] It can be understood that the plurality of first bind point target data voltages in the plurality of to-be-compensated regions in the embodiment are determined for the same set of bind point gray scale values, so that the measurement basis of the plurality of to-be-compensated regions is the same in the gray scale dimension, further improving the uniformity of the display picture of the to-be-compensated display target.

[0065] The step S31 can include but not limited to the following steps and combinations of the following steps.

[0066] S311, determine whether the pixel unit is located in any of the to-be-compensated regions.

[0067] For any pixel unit, it can be located in any to-be-compensated region or non-compensated region of the to-be-compensated display panel. As known from the above discussion, only the to-be-compensated region can include an abnormal region, that is, the pixel unit located in the to-be-compensated region can have abnormal luminous brightness without interference, and the pixel unit located in the non-to-be-compensated region can have normal luminous brightness without interference.

[0068] If the result of step S311 is "no", the following steps are executed but not limited to:

[0069] S313, set the current data voltage of the pixel unit as the corresponding target data voltage.

[0070] As discussed above, if the pixel unit is not located in any to-be-compensated region, that is, it is located in the non-to-be-compensated region, it means that the pixel unit can have normal luminous brightness without interference, and its corresponding target data voltage can be equal to the current data voltage. That is, the current data voltage of the pixel unit located in the non-to-be-compensated region does not need to be processed, and it itself can be used as the target data voltage that can meet the corresponding brightness value in the standard region.

[0071] If the result of step S311 is "Yes", the following steps are executed, but are not limited to:

[0072] S312, determining the target data voltage corresponding to the pixel unit according to the relationship between the plurality of first binding point target data voltages, the gray scale value of the pixel unit and the plurality of binding point gray scale values, and the relationship between the position of the pixel unit and the position of the plurality of first to-be-compensated pixel units in the corresponding to-be-compensated region.

[0073] As discussed above, if the pixel unit is located in any to-be-compensated region, it means that the luminous brightness of the pixel unit may be abnormal without interference, and the target data voltage corresponding to the pixel unit cannot be equal to the current data voltage.

[0074] Specifically, the plurality of binding point gray scale values include a first binding point gray scale value smaller than any of the binding point gray scale values and a second binding point gray scale value larger than any of the binding point gray scale values; wherein, as shown in the following table, the S312 step can include but is not limited to the following steps and combinations of the following steps. Figure 4

[0075] S01, determining whether the gray scale value of the pixel unit is greater than or equal to the first binding point gray scale value and less than or equal to the second binding point gray scale value.

[0076] For any gray scale value, it must be between (including equal to) the adjacent two binding point gray scale values, or less than the smallest binding point gray scale value (i.e. the first binding point gray scale value), or greater than the largest binding point gray scale value (i.e. the second binding point gray scale value). In the steps S4, S42 and S421, the "gray scale value" can be understood as including the gray scale value of each sub-pixel in the corresponding pixel unit, that is, the gray scale value of each sub-pixel is compared with the first binding point gray scale value and the second binding point gray scale value.

[0077] If the result of step S311 is "No", the following step S313 is executed, but is not limited to.

[0078] It should be noted that for the binding point gray scale value smaller than the first binding point gray scale value or larger than the second binding point gray scale value, since the binding point gray scale value is too small or too large, the calculation accuracy of the corresponding target data voltage will be low, or it is considered that the luminance value presented under the current data voltage is not much different from the standard luminance value of the corresponding pixel unit in the corresponding standard region under the gray scale binding point, further, that is, the luminance value presented by the corresponding sub-pixel under the current data voltage is not much different from the standard sub-luminance value of the corresponding sub-pixel in the corresponding standard region under the gray scale binding point.

[0079] If the result of step S01 is "Yes", the following steps are executed, but are not limited to: ​

[0080] S02, determining the target data voltage corresponding to the pixel unit according to the relationship between the first bind point target data voltage, the gray scale value of the pixel unit and the two bind point gray scale values corresponding to the interval, and the relationship between the position of the pixel unit and the position of the first pixel unit to be compensated in the corresponding region to be compensated.

[0081] As can be known from the above, if the gray scale value of the pixel unit is greater than or equal to the first bind point gray scale value and less than or equal to the second bind point gray scale value, the gray scale value of the pixel unit is between the two adjacent bind point gray scale values, and it is necessary to determine the target data voltage different from the current data voltage.

[0082] Specifically, the step S02 can include but is not limited to the following steps and combinations of the following steps.

[0083] S03, judging whether the position of the pixel unit is the same as the position of any first pixel unit to be compensated in the corresponding region to be compensated.

[0084] For any pixel unit located in the region to be compensated, the position of the pixel unit is necessarily the same as that of any first pixel unit to be compensated or second pixel unit to be compensated in the corresponding region to be compensated.

[0085] As can be known from the above, if the position of the pixel unit is the same as that of any first pixel unit to be compensated in the corresponding region to be compensated, the target data voltage of the pixel unit under the initial picture is equal to the target data voltage of the corresponding first pixel unit to be compensated under the initial picture, and further, the target sub-data voltage of each pixel of the pixel unit is also equal to the data voltage of the corresponding sub-pixel in the corresponding first pixel unit to be compensated under the initial picture. That is, at this time, it is not necessary to further perform, for example, interpolation operation according to the position of the pixel unit to calculate the corresponding target data voltage.

[0086] If the result of step S03 is "yes" (the positions are the same), the following steps are executed but are not limited to:

[0087] S04, judging whether the gray scale value of the pixel unit is the same as any one of the two bind point gray scale values corresponding to the interval.

[0088] If the result of step S04 is "yes" (the positions are the same and the gray scale values are the same), the following steps are executed but are not limited to:

[0089] S05, setting the first bind point target data voltage corresponding to the bind point gray scale value of the corresponding first pixel unit to be compensated as the corresponding target data voltage.

[0090] Based on the above discussion, based on "the position of the gray scale value of the pixel unit is the same as that of a first to-be-compensated pixel unit in the corresponding to-be-compensated region", and the gray scale value of the pixel unit is the same as any one of the two binding point gray scale values corresponding to the interval, which can be understood here as the gray scale value of at least one sub-pixel in the pixel unit being equal to any one of the two binding point gray scale values, and the same, indicating that the target data voltage of the sub-pixel is equal to the data voltage of the corresponding first to-be-compensated pixel unit under the initial picture (also equal to the target data voltage corresponding to the binding point gray scale value), further, the target sub-data voltage of each pixel of the pixel unit is also equal to the first binding point target sub-data voltage of the corresponding sub-pixel in the corresponding first to-be-compensated pixel unit. That is, at this time, it is not necessary to further perform, for example, interpolation operation according to the position of the pixel unit and the position of the gray scale value to calculate the corresponding target data voltage.

[0091] If the result of step S04 is "no" (the position is the same, and the gray scale value is different), the following steps are performed, but are not limited to:

[0092] S05, according to the corresponding first to-be-compensated pixel unit, respectively corresponding to the two first binding point target data voltages of the corresponding two binding point gray scale values, determine the corresponding target data voltage.

[0093] Based on the above discussion, based on "the position of the gray scale value of the pixel unit is the same as that of a first to-be-compensated pixel unit in the corresponding to-be-compensated region", but the gray scale value of the pixel unit is different from any one of the two binding point gray scale values corresponding to the interval, indicating that the target data voltage of the sub-pixel in the pixel unit needs to be determined according to the two first binding point target data voltages of the first to-be-compensated pixel unit under the two binding point gray scale values adjacent to the gray scale value.

[0094] Since the pixel unit has a first to-be-compensated pixel unit with the same position, the target data voltage of each sub-pixel in the pixel unit can be determined based on the two first binding point target data voltages of the first to-be-compensated pixel unit under the two binding point gray scale values adjacent to the gray scale value, and the difference relationship between the gray scale value and the two binding point gray scale values, using one-dimensional linear interpolation to determine the target data voltage of the pixel unit under the gray scale value.

[0095] Specifically, the plurality of gray scale values include a plurality of binding point gray scale values and a plurality of non-binding point gray scale values, as shown in Figure 3 After step S3, step S05 can also be summarized as the following steps:

[0096] S41, according to the relative size of the plurality of first binding point target data voltages, the non-binding point gray scale value and the plurality of binding point gray scale values, determine the first non-binding point target data voltage of the first to-be-compensated pixel unit under the non-binding point gray scale value.

[0097] In step S05, the gray scale value is the non-bound point gray scale value in step S41, and the first non-bound point target data voltage is the "target data voltage" in step S05.

[0098] If the result of step S03 is "no" (the positions are different), the following steps are performed, but are not limited to (here, the compensation area is taken as a rectangle for example):

[0099] S06, according to the four first compensation pixel units located on the boundary of the area where the pixel unit is located, the corresponding at least four first bound point target data voltages corresponding to the corresponding at least one bound point gray scale value, determine the corresponding target data voltage.

[0100] Specifically, it is also necessary to determine whether the gray scale value of the pixel unit is the same as any bound point gray scale value. If it is the same as one of the bound point gray scale values, the corresponding target data voltage can be determined by performing linear interpolation in the first direction D1 and the second direction D2 in space based on the four first bound point target data voltages, according to the positional relationship of the pixel unit and the two first compensation pixel units arranged along the first direction D1, and the positional relationship of the pixel unit and the two first compensation pixel units arranged along the second direction D2, that is, two-dimensional linear interpolation. If it is different from any of the bound point gray scale values, compared with the previous case, it is necessary to first determine the gray scale value of the pixel unit and the two bound point gray scale values corresponding to the interval where the pixel unit is located, calculate the four first compensation pixel units, each of which corresponds to two first bound point target data voltages corresponding to the two bound point gray scale values, and further determine the four data voltages of the four first compensation pixel units under the gray scale value by using one-dimensional linear interpolation according to the gap relationship between the gray scale value and the corresponding two bound point gray scale values. Similarly, based on the four data voltages, according to the positional relationship of the pixel unit and the two first compensation pixel units arranged along the first direction D1, and the positional relationship of the pixel unit and the two first compensation pixel units arranged along the second direction D2, linear interpolation is performed in the first direction D1 and the second direction D2 in space, that is, two-dimensional linear interpolation, to determine the corresponding target data voltage.

[0101] In step S3, if the gray scale value of the pixel unit is the same as one of the bound point gray scale values, as shown in FIG. 3, after step S3, step S06 can be summarized as the following steps: Figure 4

[0102] S42, according to the relative positions of the second compensation pixel unit and the plurality of first compensation pixel units, determine the second bound point target data voltage of the second compensation pixel unit under the bound point gray scale value.

[0103] ​The second pixel unit to be compensated in step S42 can be understood as the pixel unit in step S06, and the second binding point target data voltage is the target data voltage in step S06.

[0104] Further, for each pixel unit, after step S4, the Demura algorithm can be executed to further improve mura in other aspects on the basis of improving the point mura and the line mura by using the embodiment.

[0105] The application provides a display panel to be compensated, comprising a memory for storing instructions, and a controller for executing the method for generating the target data voltage according to any one of the above instructions.

[0106] Further, the controller is further configured to drive the corresponding first pixel unit to emit light according to at least the first binding point target data voltage. Of course, after the target data voltage of all pixel units at all gray scale values is determined, the controller can also drive the corresponding pixel unit to emit light according to each target data voltage.

[0107] Specifically, as shown in Figure 5 The display panel to be compensated 100 can comprise a panel body 101, a driving chip 20 electrically connected to the panel body 101, the panel body 101 can comprise at least a plurality of sub-pixels P (i.e. the plurality of sub-pixels to be compensated described above), a plurality of gate lines (GL1 to GLn), and a plurality of data lines (DL1 to DLm), and the driving chip 20 can comprise at least a source driving module 201 and a timing control module 202.

[0108] For ease of description, it is assumed that the plurality of sub-pixels P are arranged along the row direction and the column direction, and are arranged as n rows and m columns (m and n are both positive integers). Each of the gate lines (each of GL1 to GLn) is connected between a gate driving circuit 30 and the plurality of sub-pixels P of the corresponding row, and each of the data lines (each of DL1 to DLm) is connected between the source driving module 201 and the plurality of sub-pixels P of the corresponding column. The plurality of gate signals transmitted by each of the plurality of gate lines (each of GL1 to GLn) can control the plurality of rows of sub-pixels P to be opened in turn, and the data signal transmitted by each of the data lines (each of DL1 to DLm) comprises a plurality of data voltages Vdata corresponding to the plurality of sub-pixels P, so that the corresponding data voltage Vdata can be loaded to the corresponding sub-pixel P when the corresponding sub-pixel P is opened.

[0109] The gate drive circuit 30 can be integrated in the drive chip 20 or in the panel body 101, or can be arranged independently of the drive chip 20 and the panel body 101 as a separate chip. The gate drive circuit 30 and the source drive module 201 are both controlled by the control signal output by the timing control module 202 to perform the above functions, and the data signal can also be a signal generated by the source drive module 201 according to the gray scale signal output by the timing control module 202.

[0110] The memory in the embodiment can be included in the timing control module 202, and the controller can be included in at least one of the timing control module 202 and the source drive module 201.

[0111] Of course, the application can also provide a target data voltage generation device for performing the target data voltage generation method as described in any of the above.

[0112] The application provides a target data voltage generation method and device and a display panel. The method comprises the following steps: obtaining a plurality of abnormal areas of a display panel to be compensated, each abnormal area being different from an average brightness value of a region of the display panel to be compensated other than the plurality of abnormal areas at a same gray scale value, determining a plurality of to-be-compensated areas corresponding to the plurality of abnormal areas, each to-be-compensated area comprising the corresponding abnormal area, a plurality of to-be-compensated pixel units in each to-be-compensated area comprising a plurality of first to-be-compensated pixel units, adjusting an initial data voltage of the first to-be-compensated pixel units of the to-be-compensated area at a bind point gray scale value to determine a corresponding first bind point target data voltage, and taking into account avoiding occupying a large amount of memory and improving the accuracy of brightness compensation of the abnormal area.

[0113] The target data voltage generation method and device and the display panel to be compensated provided by the embodiment of the application are described in detail above, and the principles and implementation manners of the application are described by using specific examples in this paper. The above description of the embodiments is only used to help understand the technical solutions and the core ideas of the application. Those skilled in the art should understand that the technical solutions recorded in the above embodiments can be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the application.

Claims

1. A method for generating target data voltage, characterized in that, The method comprises: acquiring at least one abnormal area of a display panel to be compensated, wherein the average brightness value of each abnormal area and the area of the display panel to be compensated except the abnormal areas at the same gray scale value is different; determining at least one corresponding area to be compensated according to the at least one abnormal area, wherein each area to be compensated comprises the corresponding abnormal area, and each area to be compensated comprises a plurality of first pixel units to be compensated; adjusting the initial data voltage of the first pixel units to be compensated at the bind point gray scale value of the area to be compensated to determine the corresponding first bind point target data voltage; wherein the plurality of pixel units to be compensated further comprises a plurality of second pixel units to be compensated; wherein after the step of adjusting the initial data voltage of the first pixel units to be compensated at the bind point gray scale value of the area to be compensated to determine the corresponding first bind point target data voltage, the method further comprises: determining the second bind point target data voltage of the second pixel units to be compensated at the bind point gray scale value according to the plurality of first bind point target data voltages, the relative position of the second pixel units to be compensated and the plurality of first pixel units to be compensated.

2. The method of claim 1, wherein, The number of abnormal areas is greater than 1, the shapes of the plurality of areas to be compensated are the same, the number of the first pixel units to be compensated in each area to be compensated is the same, and the relative positions of the plurality of first pixel units to be compensated in each area to be compensated are the same; wherein the step of acquiring at least one abnormal area of a display panel to be compensated comprises: acquiring a plurality of abnormal areas of the display panel to be compensated.

3. The method of claim 2, wherein the target data voltage is generated by: The area of the overlapping area of any two areas to be compensated is 0.

4. The method of claim 1, wherein the target data voltage is generated by: The bind point gray scale values of each area to be compensated are the same.

5. The method of claim 1 to 4, wherein The plurality of gray scale values comprises the plurality of bind point gray scale values and a plurality of non-bind point gray scale values; wherein after the step of adjusting the initial data voltage of the first pixel units to be compensated at the bind point gray scale value of the area to be compensated to determine the corresponding first bind point target data voltage, the method further comprises: determining the first non-bind point target data voltage of the first pixel units to be compensated at the non-bind point gray scale value according to the relative size of the plurality of first bind point target data voltages, the non-bind point gray scale value and the plurality of bind point gray scale values.

6. The method of generating a target data voltage according to any one of claims 1 to 4, wherein, Each pixel unit to be compensated comprises a plurality of sub-pixels to be compensated, and each first bind point target data voltage comprises a plurality of first bind point target sub-data voltages corresponding to the plurality of sub-pixels to be compensated.

7. A display panel to be compensated, characterized by The method comprises: a memory for storing instructions; a controller for executing the method of generating target data voltage according to any one of claims 1 to 6 according to the instructions.

8. The display panel to be compensated according to claim 7, wherein The controller is further configured to drive the corresponding first pixel units to be compensated to emit light according to at least the first bind point target data voltage.

9. A device for generating target data voltage, characterized in that, The method for executing the method of generating target data voltage according to any one of claims 1 to 6.

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