Brightness compensation method and brightness compensation device of display panel and display device

Abstract

The invention discloses a brightness compensation method and a brightness compensation device of a display panel and a display device. The brightness compensation method of the display panel comprises the following steps: acquiring brightness data of a white picture of a preset gray scale and brightness data of a monochromatic picture of a binding point gray scale displayed by the display panel after voltage drop compensation; performing partition processing on the brightness data of the white picture to determine a white light brightness change trend of the display panel after voltage drop compensation, and performing partition processing on the brightness data of the monochromatic picture to determine a monochromatic light brightness change trend of the display panel after voltage drop compensation; determining the monochromatic target brightness of the binding point gray scale of each display partition of the display panel by comparing the white light brightness change trend and the monochromatic light brightness change trend after the voltage drop compensation; and according to the monochromatic target brightness of the binding point gray scale of each display partition, performing brightness compensation on the sub-pixel of the corresponding color in each display partition. According to the technical scheme provided by the invention, the display effect of the display panel is improved.

Description

Technical Field

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

[0002] With the development of display technology, people have higher and higher requirements for picture display quality.

[0003] In existing organic light emitting display panels, the display panels have a phenomenon of uneven display, which affects the display effect of the display panels. Summary of the invention

[0004] Embodiments of the present invention provide a brightness compensation method, a brightness compensation device and a display device for a display panel, so as to improve the display effect of the display panel.

[0005] According to one aspect of the present invention, a brightness compensation method for a display panel is provided, comprising:

[0006] Acquire brightness data of a white picture of a preset gray scale and brightness data of a monochrome picture of a bounding point gray scale displayed by the display panel after voltage drop compensation;

[0007] Performing partition processing on the brightness data of the white picture to determine the white light brightness change trend of the display panel after voltage drop compensation, and

[0008] Performing partition processing on the brightness data of the monochrome picture to determine the brightness change trend of the monochrome light of the display panel after voltage drop compensation;

[0009] Determining the monochrome target brightness of the binding point grayscale of each display partition of the display panel by comparing the white light brightness change trend and the monochrome light brightness change trend after voltage drop compensation;

[0010] According to the monochrome target brightness of the binding point grayscale of each display partition, brightness compensation is performed on the sub-pixels of the corresponding colors in each display partition.

[0011] Optionally, the obtaining of brightness data of a white picture of a preset gray scale and brightness data of a monochrome picture of a binding point gray scale displayed by the display panel after voltage drop compensation includes:

[0012] Performing voltage drop compensation on the display panel;

[0013] Controlling the display panel to display a white picture of a preset gray scale, and detecting brightness data of each sub-pixel in the white picture;

[0014] Controlling the display panel to display a monochrome picture with a grayscale of a binding point, and detecting brightness data of each sub-pixel in the monochrome picture;

[0015] Preferably, the preset grayscale includes the maximum display grayscale of the display panel; and the binding point grayscale includes all binding point grayscales of the display panel.

[0016] Optionally, the performing partition processing on the brightness data of the white picture to determine the white light brightness change trend of the display panel after voltage drop compensation includes:

[0017] Dividing the brightness data of the white screen of the display panel into M*N display partitions to determine the white light brightness data of each display partition; wherein M is the number of columns of the display partition, and N is the number of rows of the display partition;

[0018] The white light brightness data of each display partition is averaged by using a preset average algorithm to obtain the average white light brightness of each display partition;

[0019] Determining a white light brightness variation trend of the display panel after voltage drop compensation according to the average white light brightness of each display partition;

[0020] The partitioning process of the brightness data of the monochrome picture to determine the brightness change trend of the monochrome light of the display panel after voltage drop compensation includes:

[0021] Dividing the brightness data of the monochrome picture of the display panel into M*N display partitions, and determining the monochrome brightness data of each display partition;

[0022] The monochromatic light brightness data of each display partition is averaged by using a preset average algorithm to obtain the average brightness of the monochromatic light of each display partition;

[0023] Determining a change trend of the monochromatic light brightness of the display panel after voltage drop compensation according to the average monochromatic light brightness of each display partition;

[0024] Preferably, M is an odd number greater than 1, and N is an odd number greater than 1.

[0025] Optionally, the calculating the mean of the white light brightness data of each display partition by using a preset mean algorithm to obtain the average white light brightness of each display partition includes:

[0026] The white light brightness data of each display partition is calculated step by step according to the first preset calculation unit to obtain the average brightness of the white light of each display partition;

[0027] The step of determining the white light brightness variation trend of the display panel after voltage drop compensation according to the average white light brightness of each display partition includes:

[0028] Taking the average brightness of white light in the central display subarea located in the central area of ​​the display panel as the reference brightness of white light;

[0029] Calculate the white light brightness gain value of each display partition outside the central display partition relative to the central display partition according to the white light average brightness of each display partition outside the central display partition, the white light reference brightness and a preset brightness gain calculation formula;

[0030] According to the white light brightness gain value of each display subarea outside the central display subarea, the white light brightness change trend of the display panel after voltage drop compensation is determined.

[0031] Optionally, the method of performing mean calculation on the monochromatic brightness data of each display partition by using a preset mean algorithm to obtain the average monochromatic brightness of each display partition includes:

[0032] The monochromatic light brightness data of each display partition is calculated according to the step-by-step progressive mean value to obtain the monochromatic light average brightness of each display partition;

[0033] Determining the change trend of the monochromatic light brightness of the display panel after voltage drop compensation according to the average monochromatic light brightness of each display partition includes:

[0034] Taking the average brightness of monochromatic light of a central display subarea located in the central area of ​​the display panel as a monochromatic light reference brightness;

[0035] Calculate the monochromatic light gain value of each display partition outside the central display partition relative to the central display partition according to the monochromatic light average brightness of each display partition outside the central display partition, the monochromatic light reference brightness and a preset brightness gain calculation formula;

[0036] According to the monochromatic light brightness gain value of each display subarea outside the central display subarea, the monochromatic light brightness variation trend of the display panel after voltage drop compensation is determined.

[0037] Optionally, by comparing the white light brightness variation trend and the monochromatic light brightness variation trend after voltage drop compensation, the monochromatic target brightness of the binding point grayscale of each display partition of the display panel is determined, including:

[0038] Determine whether the brightness change trend of white light after voltage drop compensation is the same as that of monochromatic light;

[0039] If they are the same, the average brightness of the monochromatic light of the central display subarea located in the central area of ​​the display panel is determined as the monochromatic target brightness of each display subarea;

[0040] If they are different, the average brightness of the monochromatic light of each display partition is correspondingly determined as the monochromatic target brightness of each display partition.

[0041] Optionally, the monochrome picture includes a first color picture, a second color picture and a third color picture; the monochrome light brightness change trend includes a first color light brightness change trend, a second color light brightness change trend and a third color light brightness change trend of the binding point grayscale;

[0042] By comparing the white light brightness variation trend and the monochromatic light brightness variation trend after voltage drop compensation, the monochromatic target brightness of the binding point grayscale of each display partition of the display panel is determined, including:

[0043] By comparing the brightness variation trend of white light after voltage drop compensation with the brightness variation trend of each color light, the target brightness of the binding point gray scale of each color sub-pixel in each display partition of the display panel is determined.

[0044] Optionally, performing brightness compensation on sub-pixels of corresponding colors in each display partition according to the monochrome target brightness of the binding point grayscale of each display partition includes:

[0045] Determine the brightness compensation value of the binding point grayscale of each sub-pixel in each display partition according to the target brightness of the binding point grayscale of each color sub-pixel in each display partition, and store it in the display panel;

[0046] The brightness compensation value of the binding point grayscale of each sub-pixel in each display partition is obtained, and each grayscale brightness of the corresponding sub-pixel is compensated according to the brightness compensation value of the binding point grayscale of each sub-pixel.

[0047] According to another aspect of the present invention, there is provided a brightness compensation device for a display panel, comprising:

[0048] A data acquisition unit, used to acquire brightness data of a white picture of a preset gray scale and brightness data of a monochrome picture of a binding point gray scale of the display panel after voltage drop compensation;

[0049] A data processing unit, used for performing partition processing on the brightness data of the white picture to determine the white light brightness change trend of the display panel after voltage drop compensation; and

[0050] Performing partition processing on the brightness data of the monochrome picture to determine the monochrome brightness change trend of the display panel after voltage drop compensation;

[0051] a target brightness determination unit, which determines the monochrome target brightness of the binding point grayscale of each display partition of the display panel by comparing the white light brightness change trend and the monochrome light brightness change trend after voltage drop compensation;

[0052] The compensation unit is used to perform brightness compensation on the sub-pixels of the corresponding colors in each display partition according to the monochrome target brightness of the binding point grayscale of each display partition.

[0053] According to another aspect of the present invention, there is provided a display device, comprising:

[0054] display panel; and

[0055] at least one processor and a memory communicatively connected to the at least one processor; wherein,

[0056] The memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can perform brightness compensation by executing the brightness compensation method for a display panel described in any embodiment of the present invention.

[0057] The embodiment of the present invention provides a brightness compensation method, a brightness compensation device and a display device for a display panel, wherein the brightness compensation method for the display panel includes: obtaining brightness data of a white picture of a preset gray scale and brightness data of a monochrome picture of a binding point gray scale displayed by the display panel after voltage drop compensation; performing partition processing on the brightness data of the white picture to determine the white light brightness change trend of the display panel after voltage drop compensation; performing partition processing on the brightness data of the monochrome picture to determine the monochrome light brightness change trend of the display panel after voltage drop compensation; determining the monochrome target brightness of the binding point gray scale of each display partition of the display panel by comparing the white light brightness change trend after voltage drop compensation with the monochrome light brightness change trend; performing brightness compensation on the sub-pixels of the corresponding color in each display partition according to the monochrome target brightness of the binding point gray scale of each display partition. The technical solution provided by the embodiment of the present invention determines the target value of Demura compensation by comparing the white light brightness change trend after voltage drop compensation (IR_Drop compensation) with the monochrome light brightness change trend, thereby improving the problem that Demura compensation affects the IR_Drop compensation result, thereby ensuring the brightness uniformity and chromaticity uniformity of the display panel and improving the display effect of the display panel.

[0058] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0060] Figure 1 is a flow chart of a brightness compensation method for a display panel provided by an embodiment of the present invention;

[0061] Figure 2 is a schematic diagram of a method for dividing a display area in a display panel provided by an embodiment of the present invention;

[0062] Figure 3 is a flow chart of step S110 in a brightness compensation method for a display panel provided by an embodiment of the present invention;

[0063] Figure 4 is a flow chart of step S120 in a brightness compensation method for a display panel provided by an embodiment of the present invention;

[0064] Figure 5 is another flow chart of step S120 in a brightness compensation method for a display panel provided by an embodiment of the present invention;

[0065] Figure 6 is a flow chart of another brightness compensation method for a display panel provided by an embodiment of the present invention;

[0066] Figure 7 It is a structural block diagram of a brightness compensation device for a display panel provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0067] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0068] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0069] In the process of implementing the present invention, the inventors found that the following problems exist in the related art. With the development of display technology, people have higher and higher requirements for the quality of picture display. In order to improve the display effect, the related art usually uses the IR_Drop / Demura algorithm to repair the effect of the defective panel, but the display panel still has the phenomenon of uneven display, which affects the display effect of the display panel. The inventors found that the reason for the above problems is that the display panel may have a problem of inconsistency between the white brightness trend and the monochrome brightness trend after uniformity compensation. When the white and monochrome brightness trends are inconsistent, Demura compensation will affect the IR_Drop compensation result, so there is a problem of reduced brightness uniformity and deterioration of chromaticity uniformity, which reduces the display effect of the display panel.

[0070] In view of the above research findings of the inventors, an embodiment of the present invention provides a brightness compensation method for a display panel, comprising:

[0071] S110 , obtaining brightness data of a white picture of a preset gray scale and brightness data of a monochrome picture of a bounding point gray scale displayed by the display panel after voltage drop compensation.

[0072] Specifically, there is IR Drop (voltage drop) in the display panel. Specifically, due to the difference in the physical positions of different sub-pixels, the wiring resistance received by the current during the transmission process is different, which will cause the current size at different physical positions to be inconsistent, resulting in a voltage drop phenomenon. IR Drop is mainly manifested as the brightness gradient phenomenon between the far IC end and the near IC end. Among them, the far IC end can be understood as the end of the display panel that is farther away from the driver chip (IC), and the near IC end can be understood as the end of the display panel that is closer to the driver chip (IC). Therefore, in order to better improve the problem of uneven brightness display, it is necessary to compensate for the IR Drop of the display panel.

[0073] After the voltage drop compensation is performed on the display panel, the display panel is controlled to display a white picture of a preset gray scale, and the brightness data of the white picture is detected, so as to obtain the brightness data of the white picture of the preset gray scale displayed by the display panel after the voltage drop compensation. After the voltage drop compensation is performed on the display panel, the display panel is controlled to display a monochrome picture of a gray scale of a binding point, and the brightness data of the monochrome picture is detected, so as to obtain the brightness data of the monochrome picture of the gray scale of a binding point displayed by the display panel after the voltage drop compensation. In other words, on the basis of IR_Drop compensation, the monochromatic optical data required for Demura compensation is collected.

[0074] S120, performing partition processing on the brightness data of the white picture to determine the brightness change trend of the white light of the display panel after voltage drop compensation, and performing partition processing on the brightness data of the monochrome picture to determine the brightness change trend of the monochrome light of the display panel after voltage drop compensation.

[0075] Specifically, the display area of ​​the display panel is divided into a plurality of display subareas. For example, Figure 2 is a schematic diagram of a method for dividing a display area in a display panel provided by an embodiment of the present invention, Figure 2 15 display partitions are shown as a schematic diagram. It should be noted that the number of display partitions in the display area of ​​the display panel is not limited to 15, and can also be other numbers, such as 9, 21 or 25, etc., which is not limited in the embodiments of the present application. The more display partitions there are in the display area, that is, the finer the display partition division, the better the final brightness compensation effect. However, as the number of display partitions in the display area increases, the number of target brightnesses of each partition that needs to be obtained also increases, and the amount of calculation will also increase accordingly. Therefore, the number of display partitions in the display area can be flexibly selected according to actual conditions.

[0076] The brightness data of the white screen is processed according to the display area partition method to obtain the brightness value of each display partition, so as to determine the white light brightness change trend of the display panel after voltage drop compensation. After the display panel is compensated for the voltage drop, the brightness uniformity of the white screen displayed by the display panel is improved, but due to the compensation accuracy, process instability and other reasons, there may still be some differences such as Figure 2 The white light brightness change trend is that the brightness gradually decreases along the direction X away from the driving chip 200 (IC).

[0077] Specifically, the brightness data of the monochrome picture can be partitioned by partitioning the brightness data of the white picture, so as to determine the monochrome brightness change trend of the display panel after voltage drop compensation. It should be noted that the display panel may include a first color sub-pixel that emits a first color light, a second color sub-pixel that emits a second color light, and a third color sub-pixel that emits a third color light. Correspondingly, the monochrome picture includes a first color picture, a second color picture, and a third color picture; the monochrome brightness change trend includes the first color brightness change trend of the grayscale of the binding point, the second color brightness change trend, and the third color brightness change trend. Exemplarily, the display panel may include a red sub-pixel that emits red light, a green sub-pixel that emits green light, and a blue sub-pixel that emits blue light. Correspondingly, the monochrome picture may be a red picture, a green picture, and a blue picture; the monochrome brightness change trend includes the red light brightness change trend, the green light brightness change trend, and the blue light brightness change trend of the grayscale of the binding point.

[0078] S130 , determining the monochrome target brightness of the binding point grayscale of each display partition of the display panel by comparing the white light brightness change trend and the monochrome light brightness change trend after voltage drop compensation.

[0079] Specifically, the white light brightness change trend of the white picture of the preset grayscale is compared with the brightness change trend of the monochrome picture of the binding point grayscale, and the comparison result is output to the algorithm end. Exemplarily, if the brightness change trends are the same, the output comparison result is 1, and if the brightness change trends are different, the output comparison result is 0. It can be roughly judged whether the white light brightness change trend is the same as the monochrome light brightness change trend. For example, if the white light brightness change trend is that the brightness gradually decreases in the direction away from the driver chip 200 (IC); if the monochrome light brightness change trend is also that the brightness gradually decreases in the direction away from the driver chip 200 (IC), it can be determined that the white light brightness change trend is the same as the monochrome light brightness change trend, otherwise they are different.

[0080] A preset algorithm may also be set to accurately judge the white light brightness change trend and the monochromatic light brightness change trend. For example, the white light brightness change trend is that the brightness gradually decreases in the direction away from the driver chip 200 (IC); if the monochromatic light brightness change trend is that the brightness gradually decreases in the direction away from the driver chip (IC), and the difference in white light brightness between two adjacent display partitions and the difference in monochromatic light brightness are within the same preset interval, then it is determined that the white light brightness change trend is the same as the monochromatic light brightness change trend, otherwise they are different. The judgment conditions for the white light brightness change trend and the monochromatic light brightness change trend can be determined according to actual needs. The method of determining the monochromatic target brightness when the brightness change trends of white light and monochromatic light are the same is different from the method of determining the monochromatic target brightness when the brightness change trends of white light and monochromatic light are different.

[0081] S140 , performing brightness compensation on sub-pixels of corresponding colors in each display partition according to the monochrome target brightness of the binding point grayscale of each display partition.

[0082] Specifically, by determining the monochrome target brightness of a binding point grayscale of each display partition, the target brightness of the corresponding color sub-pixel in each display partition when displaying the binding point grayscale can be determined. The monochrome target brightness of some or all binding point grayscales can be determined, and the monochrome target brightness of non-binding point grayscales can be obtained by a difference algorithm, so that the monochrome target brightness corresponding to each grayscale can be determined. The brightness data of each monochrome picture of the display panel when displaying the binding point grayscale is obtained, and the brightness data of each monochrome picture is partitioned to determine the brightness change trend of each monochrome picture of the display panel when displaying the binding point grayscale after voltage drop compensation; by comparing the brightness change trend of white light and each monochromatic light, the target brightness of the binding point grayscale of each color sub-pixel in each display partition of the display panel can be determined. Based on the target brightness of the sub-pixel, the data voltage of the sub-pixel is adjusted to achieve brightness compensation for the sub-pixel.

[0083] The brightness compensation method of the display panel provided in an embodiment of the present invention includes: obtaining brightness data of a white picture of a preset gray scale displayed by the display panel after voltage drop compensation and brightness data of a monochrome picture of a binding point gray scale; performing partition processing on the brightness data of the white picture to determine the white light brightness change trend of the display panel after voltage drop compensation; performing partition processing on the brightness data of the monochrome picture to determine the monochrome light brightness change trend of the display panel after voltage drop compensation; determining the monochrome target brightness of the binding point gray scale of each display partition of the display panel by comparing the white light brightness change trend with the monochrome light brightness change trend after voltage drop compensation; the embodiment of the present application determines the monochrome target brightness of the binding point gray scale of each display partition of the display panel in different ways by setting the white light brightness change trend and the monochrome light brightness change trend to be the same and different, and can perform demura compensation on the display panel in a targeted manner according to the brightness trends of white light and monochrome light, thereby improving the problem that demura compensation affects the IR_Drop compensation result when the white light brightness change trend is different from the monochrome light brightness change trend.

[0084] For ease of understanding, the specific implementation of the above steps will be described in detail below.

[0085] In one embodiment of the present invention, Figure 3 is a flow chart of step S110 in a brightness compensation method for a display panel provided by an embodiment of the present invention, with reference to Figure 3 Step S110 obtains the brightness data of the white picture with a preset gray scale and the brightness data of the monochrome picture with a gray scale of a binding point displayed by the display panel after voltage drop compensation, including:

[0086] S101 , performing voltage drop compensation on a display panel.

[0087] S102 , controlling the display panel to display a white picture of a preset gray scale, and detecting brightness data of each sub-pixel in the white picture; wherein the preset gray scale includes the maximum display gray scale of the display panel.

[0088] S103 , controlling the display panel to display a monochrome picture of a binding point grayscale, and detecting brightness data of each sub-pixel in the monochrome picture; wherein the binding point grayscale includes all binding point grayscales of the display panel.

[0089] Specifically, the greater the current flowing through the sub-pixel, the greater the brightness of the sub-pixel. Therefore, when the brightness of the white picture displayed by the display panel is greater, the greater the difference in voltage drop generated at the sub-pixels at different positions, the worse the brightness uniformity of the white picture. Therefore, when collecting the brightness data of the white picture with a preset grayscale, the preset grayscale can be a grayscale in the high grayscale range. In an embodiment of the present invention, the display panel is controlled to display a white picture with a maximum grayscale, and the brightness data of each sub-pixel in the maximum white picture is detected, which can further improve the compensation effect after Demura compensation. Among them, the maximum grayscale displayed by the display panel can be, for example, 255 grayscale. When the display panel is controlled to display a monochrome picture of a binding point grayscale, the display panel can be controlled to display a monochrome picture of each color of each binding point grayscale in turn, which can further improve the compensation effect after Demura compensation. For example, 5 grayscales of 16 grayscales, 32 grayscales, 96 grayscales, 192 grayscales and 255 grayscales can be preset as binding point grayscales.

[0090] Based on any of the above embodiments, in one embodiment of the present invention, Figure 4 is a flow chart of step S120 in a brightness compensation method for a display panel provided by an embodiment of the present invention, with reference to Figure 4 In step S120, the brightness data of the white picture is processed by partitioning to determine the white light brightness change trend of the display panel after voltage drop compensation, specifically including:

[0091] S201 , dividing the brightness data of the white screen of the display panel into M*N display partitions, and determining the white light brightness data of each display partition; wherein M is the number of columns of the display partition, and N is the number of rows of the display partition.

[0092] Specifically, dividing the display area of ​​the display panel into display partitions of M columns and N rows can facilitate the determination of the white light brightness change trend. The area of ​​each display partition can be set to be the same, that is, the number of sub-pixels included in each display partition is the same, which can improve the accuracy of the light brightness change trend. Figure 2 The example in FIG. 2 shows that the display panel is divided into display partitions of 3 columns and 5 rows, including display partitions 1 to 15 .

[0093] S202 , calculating the mean of the white light brightness data of each display partition using a preset mean algorithm to obtain the average white light brightness of each display partition.

[0094] Specifically, the preset average algorithm can be understood as an algorithm for calculating the average value of white light or monochromatic light emitted by the display partition.

[0095] The method for calculating the mean of white light brightness data of a display partition may include: summing the brightness data of each sub-pixel in the display partition to obtain a brightness sum; and then obtaining the average white light brightness of the display partition based on the ratio of the brightness sum to the total number of sub-pixels in the display partition.

[0096] Optionally, the white light brightness data of each display partition is averaged by a preset average algorithm to obtain the average white light brightness of each display partition. It can also include: calculating the white light brightness data of each display partition according to a step-by-step progressive average algorithm to obtain the average white light brightness of each display partition.

[0097] Specifically, each display partition is further divided step by step according to the preset division method, wherein the number of division levels can be set according to actual needs, and the division methods of different levels can be the same or different; the smallest area (the last level) after the step-by-step division includes at least two white light brightness data (brightness data of two sub-pixels). For example, each display partition is further divided D times, that is, the last level is the Dth level. Then, the area divided at the last level is used as a calculation unit to complete the average brightness of each area obtained by the last level division (that is, the brightness data is summed and then divided by the number of brightness data). Then, the area divided at the D-1th level is used as a calculation unit to complete the average brightness of each area obtained by the D-1th level division; then, the area divided at the D-2th level is used as a calculation unit to complete the average brightness of each area obtained by the D-2th level division. And so on, until the average brightness of the area divided at the 1st level is calculated, the average brightness of white light of the display partition is obtained. The brightness data in the display partition is calculated in a step-by-step progressive manner, which can improve the accuracy of the data and more accurately express the brightness trend of the panel.

[0098] Take the resolution of the display panel as 1080*2400, divide the display panel into 3 columns and 5 rows of display partitions, and then perform a 3*3 sub-block progressive mean algorithm on the brightness data of each display partition in the 3 columns and 5 rows of display partitions to obtain the final brightness mean of each display partition as an example for illustration. The display area of ​​the display panel is divided into 15 display partitions, each of which includes 360*480 sub-pixels. Then continue to divide the brightness data of the 250*480 sub-pixels of each display partition into 3*3 sub-blocks, and each display partition obtains 9 sub-blocks, each of which includes 120*160 sub-pixel brightness data. The last level is the second level, and the area divided in the second level is used as the calculation unit to calculate the average value of the brightness data of 120*160 sub-pixels in each area, and 9 data are obtained, corresponding to the brightness data of 9 sub-blocks. Then, taking the area divided at the first level as the calculation unit, the average brightness of the white light in the display partition can be obtained by calculating the average value of the 9 data.

[0099] Of course, the luminance data in the display partition of 3 columns and 5 rows can be subjected to a progressive mean algorithm of 2*2 sub-blocks, and the number of levels of step-by-step division can be increased. Alternatively, after the display partition is divided into 3*3 sub-blocks twice, it is further divided into 4*4 sub-blocks. The embodiment of the present invention is not limited to this.

[0100] S203 , determining a white light brightness variation trend of the display panel after voltage drop compensation according to the average white light brightness of each display subarea.

[0101] Optionally, determining a white light brightness change trend of the display panel after voltage drop compensation according to the average white light brightness of each display partition includes:

[0102] The average brightness of white light in the central display partition located in the central area of ​​the display panel is used as the white light reference brightness;

[0103] Calculate the white light brightness gain value of each display partition outside the central display partition relative to the central display partition according to the white light average brightness of each display partition outside the central display partition, the white light reference brightness and the preset brightness gain calculation formula;

[0104] According to the white light brightness gain value of each display partition outside the central display partition, the white light brightness change trend of the display panel after voltage drop compensation is determined.

[0105] Exemplary, reference Figure 2 , the average white light brightness of the central display partition located in the central area of ​​the display panel is taken as the white light reference brightness, and the average white light brightness of the central display partition can be normalized to 1. According to the average white light brightness of each display partition outside the central display partition, the white light reference brightness and the preset brightness gain calculation formula, the white light brightness gain value of each display partition outside the central display partition relative to the central display partition is calculated. Among them, the brightness gain formula can be L 增益 =L 白 / L 白-中心 .L 白 is the average brightness of white light in a display partition outside the central display partition, L 白-中心 is the average brightness of white light in the center display partition, L 增益 It is the white light brightness gain value of the display partition.

[0106] Based on any of the above embodiments, in one embodiment of the present invention, Figure 5 is another flow chart of step S120 in a brightness compensation method for a display panel provided in an embodiment of the present invention, with reference to Figure 5 In step S120, the brightness data of the monochrome picture is processed by partitioning to determine the brightness change trend of the monochrome light of the display panel after voltage drop compensation, which specifically includes:

[0107] S301 , dividing the brightness data of the monochrome picture of the display panel into M*N display partitions, and determining the monochrome brightness data of each display partition.

[0108] S302 , calculating the mean of the monochromatic light brightness data of each display partition using a preset mean algorithm to obtain the average brightness of the monochromatic light of each display partition.

[0109] Specifically, the average value of the monochromatic brightness data of the display partition can be calculated, and the brightness data of the sub-pixels of the corresponding color in the display partition can be calculated to obtain the brightness sum; then, according to the ratio of the brightness sum to the total number of sub-pixels of the corresponding color in the display partition, the average brightness of the monochromatic light of the corresponding color in the display partition can be obtained. Exemplarily, the red brightness sum is calculated according to the brightness data of the red sub-pixels in the display partition, and then the average brightness of the red light in the display partition is obtained according to the ratio of the red brightness sum to the total number of red sub-pixels in the display partition; the green brightness sum is calculated according to the brightness data of the green sub-pixels in the display partition, and then the average brightness of the green light in the display partition is obtained according to the ratio of the green brightness sum to the total number of green sub-pixels in the display partition; the blue brightness sum is calculated according to the brightness data of the blue sub-pixels in the display partition, and then the average brightness of the blue light in the display partition is obtained according to the ratio of the blue brightness sum to the total number of blue sub-pixels in the display partition.

[0110] Optionally, the monochromatic brightness data of each display partition is averaged by a preset average algorithm to obtain the monochromatic average brightness of each display partition, including: calculating the monochromatic brightness data of each display partition according to a step-by-step progressive average algorithm to obtain the monochromatic average brightness of each display partition.

[0111] The specific determination method can refer to the above step S202, which will not be described in detail here. It should be noted that the smallest area (the last level) after the level-by-level division includes at least two brightness data of corresponding colors.

[0112] S303 , determining a change trend of the monochromatic light brightness of the display panel after voltage drop compensation according to the average monochromatic light brightness of each display partition.

[0113] Optionally, determining the change trend of the monochromatic light brightness of the display panel after voltage drop compensation according to the average monochromatic light brightness of each display partition includes:

[0114] The average brightness of the monochromatic light in the central display partition located in the central display partition of the display panel is used as the monochromatic light reference brightness;

[0115] Calculate the monochromatic light gain value of each display partition outside the central display partition relative to the central display partition according to the monochromatic light average brightness of each display partition outside the central display partition, the monochromatic light reference brightness and a preset brightness gain calculation formula;

[0116] According to the monochromatic light brightness gain value of each display subarea outside the central display subarea, the monochromatic light brightness variation trend of the display panel after voltage drop compensation is determined.

[0117] The specific determination method may refer to the above step S203 and will not be described in detail here.

[0118] Based on the above embodiment, optionally, M is an odd number greater than 1, and N is an odd number greater than 1, and the display partition of the (M+1) / 2th column and the (N+1) / 2th row in the display partitions divided by the display panel can be used as the central display partition.

[0119] Based on any of the above embodiments, in one embodiment of the present invention, Figure 6 is a flowchart of another brightness compensation method for a display panel provided by an embodiment of the present invention, referring to Figure 6 Step S130 determines the monochrome target brightness of each display partition of the display panel by comparing the white light brightness change trend and the monochrome light brightness change trend after voltage drop compensation, including:

[0120] S401, determine whether the brightness change trend of white light after voltage drop compensation is the same as the brightness change trend of monochromatic light; if they are the same, execute step S402; if they are different, execute step S403.

[0121] S402: determining the average brightness of the monochromatic light of the central display partition located in the central area of ​​the display panel as the monochromatic target brightness of each display partition.

[0122] S403, the average brightness of the monochromatic light of each display partition is correspondingly determined as the monochromatic target brightness of each display partition.

[0123] Specifically, it is determined whether the white light brightness change trend after voltage drop compensation is the same as the monochromatic light brightness change trend. If they are the same, the monochromatic light average brightness of the central display partition located in the central area of ​​the display panel is used as the monochromatic target brightness of each display partition. It should be noted that each binding point grayscale corresponds to a first color target brightness, a second color target brightness and a third color target brightness. During compensation, the sub-pixels of the corresponding colors in each display partition are brightness compensated according to the monochromatic target brightness of the binding point grayscale of the central display partition. If they are not the same, the monochromatic light average brightness of each display partition is correspondingly determined as the monochromatic target brightness of each display partition. That is, the monochromatic light average brightness of display partition 1 is used as the target brightness of the corresponding color sub-image in display partition 1; the monochromatic light average brightness of display partition 2 is used as the target brightness of the corresponding color sub-image in display partition 2, and so on. Similarly, each binding point grayscale corresponds to a first color target brightness, a second color target brightness and a third color target brightness. During compensation, the sub-pixels of the corresponding colors in each display partition are brightness compensated according to the monochromatic target brightness of the binding point grayscale of each display partition.

[0124] On the basis of any of the above embodiments, according to the monochrome target brightness of the binding point grayscale of each display partition, brightness compensation is performed on the sub-pixels of the corresponding color in each display partition, including:

[0125] Determine the brightness compensation value of the binding point grayscale of each sub-pixel in each display partition according to the target brightness of the binding point grayscale of each sub-pixel in each display partition, and store it in the display panel;

[0126] The brightness compensation value of the binding point grayscale of each sub-pixel in each display partition is obtained, and each grayscale brightness of the corresponding sub-pixel is compensated according to the brightness compensation value of the binding point grayscale of each sub-pixel.

[0127] Figure 7 is a structural block diagram of a brightness compensation device for a display panel provided by an embodiment of the present invention, with reference to Figure 7 , a brightness compensation device for a display panel, comprising:

[0128] A data acquisition unit 10 is used to acquire brightness data of a white picture of a preset gray scale and brightness data of a monochrome picture of a tied point gray scale of a display panel after voltage drop compensation;

[0129] The data processing unit 20 is used to perform partition processing on the brightness data of the white picture to determine the white light brightness change trend of the display panel after voltage drop compensation; and

[0130] Performing partition processing on the brightness data of the monochrome picture to determine the brightness change trend of the monochrome light of the display panel after voltage drop compensation;

[0131] The target brightness determination unit 30 determines the monochrome target brightness of the binding point grayscale of each display partition of the display panel by comparing the white light brightness change trend and the monochrome light brightness change trend after voltage drop compensation;

[0132] The compensation unit 40 is used to perform brightness compensation on the sub-pixels of the corresponding colors in each display partition according to the monochrome target brightness of the binding point grayscale of each display partition.

[0133] The brightness compensation device for a display panel provided in an embodiment of the present invention can execute the brightness compensation method for a display panel provided in any embodiment of the present invention, and has functional modules and beneficial effects corresponding to the execution method.

[0134] The embodiment of the present invention further provides a display panel, which performs brightness compensation by using the brightness compensation method of the display panel described in any embodiment of the present invention, and has the same technical effect, which will not be described in detail here.

[0135] The embodiment of the present invention further provides a display panel device, comprising: a display panel; and at least one processor and a memory connected to the at least one processor in communication; wherein the memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can perform brightness compensation by the brightness compensation method of the display panel of any embodiment of the present invention. The same technical effects are achieved and will not be described in detail here.

[0136] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A brightness compensation method for a display panel, characterized in that: include: Acquire brightness data of a white picture of a preset gray scale and brightness data of a monochrome picture of a bounding point gray scale displayed by the display panel after voltage drop compensation; Performing partition processing on the brightness data of the white picture to determine the brightness change trend of the white light of the display panel after voltage drop compensation, and performing partition processing on the brightness data of the monochrome picture to determine the brightness change trend of the monochrome light of the display panel after voltage drop compensation; Determining the monochrome target brightness of the binding point grayscale of each display partition of the display panel by comparing the white light brightness change trend and the monochrome light brightness change trend after voltage drop compensation; According to the monochrome target brightness of the binding point grayscale of each display partition, brightness compensation is performed on the sub-pixels of the corresponding colors in each display partition.

2. The brightness compensation method of a display panel according to claim 1, characterized in that: The obtaining of the brightness data of a white picture of a preset gray scale and the brightness data of a monochrome picture of a bounding point gray scale displayed by the display panel after voltage drop compensation includes: Performing voltage drop compensation on the display panel; Controlling the display panel to display a white picture of a preset gray scale, and detecting brightness data of each sub-pixel in the white picture; Controlling the display panel to display a monochrome picture with a grayscale of a binding point, and detecting brightness data of each sub-pixel in the monochrome picture; Preferably, the preset grayscale includes the maximum display grayscale of the display panel; and the binding point grayscale includes all binding point grayscales of the display panel.

3. The brightness compensation method of a display panel according to claim 2, characterized in that: The performing partition processing on the brightness data of the white picture to determine the white light brightness change trend of the display panel after voltage drop compensation includes: Dividing the brightness data of the white screen of the display panel into M*N display partitions to determine the white light brightness data of each display partition; wherein M is the number of columns of the display partition, and N is the number of rows of the display partition; The white light brightness data of each display partition is averaged by using a preset average algorithm to obtain the average white light brightness of each display partition; Determining a white light brightness variation trend of the display panel after voltage drop compensation according to the average white light brightness of each display partition; The performing partition processing on the brightness data of the monochrome picture to determine the monochrome brightness change trend of the display panel after voltage drop compensation includes: Dividing the brightness data of the monochrome picture of the display panel into M*N display partitions, and determining the monochrome brightness data of each display partition; The monochromatic light brightness data of each display partition is averaged by using a preset average algorithm to obtain the average brightness of the monochromatic light of each display partition; Determining a change trend of the monochromatic light brightness of the display panel after voltage drop compensation according to the average monochromatic light brightness of each display partition; Preferably, M is an odd number greater than 1, and N is an odd number greater than 1.

4. The brightness compensation method of a display panel according to claim 3, characterized in that: The method of calculating the mean of the white light brightness data of each display partition by using a preset mean algorithm to obtain the average white light brightness of each display partition includes: The white light brightness data of each display partition is averaged according to a step-by-step average algorithm to obtain the average brightness of the white light of each display partition; The step of determining the white light brightness variation trend of the display panel after voltage drop compensation according to the average white light brightness of each display partition includes: Taking the average brightness of white light in the central display subarea located in the central area of ​​the display panel as the reference brightness of white light; Calculate the white light brightness gain value of each display partition outside the central display partition relative to the central display partition according to the white light average brightness of each display partition outside the central display partition, the white light reference brightness and a preset brightness gain calculation formula; According to the white light brightness gain value of each display subarea outside the central display subarea, the white light brightness change trend of the display panel after voltage drop compensation is determined.

5. The brightness compensation method of a display panel according to claim 3, characterized in that: The method of calculating the average value of the monochromatic light brightness data of each display partition by using a preset average value algorithm to obtain the average monochromatic light brightness of each display partition includes: The monochromatic brightness data of each display partition is averaged according to a step-by-step average algorithm to obtain the average monochromatic brightness of each display partition; Determining the change trend of the monochromatic light brightness of the display panel after voltage drop compensation according to the average monochromatic light brightness of each display partition includes: Taking the average brightness of monochromatic light of a central display subarea located in the central area of ​​the display panel as a monochromatic light reference brightness; Calculate the monochromatic light gain value of each display partition outside the central display partition relative to the central display partition according to the monochromatic light average brightness of each display partition outside the central display partition, the monochromatic light reference brightness and a preset brightness gain calculation formula; According to the monochromatic light brightness gain value of each display subarea outside the central display subarea, the monochromatic light brightness variation trend of the display panel after voltage drop compensation is determined.

6. The brightness compensation method of a display panel according to claim 3, characterized in that: The step of determining the monochrome target brightness of the binding point grayscale of each display partition of the display panel by comparing the white light brightness change trend and the monochrome light brightness change trend after voltage drop compensation includes: Determine whether the brightness change trend of white light after voltage drop compensation is the same as that of monochromatic light; If they are the same, the average brightness of the monochromatic light of the central display subarea located in the central area of ​​the display panel is determined as the monochromatic target brightness of each display subarea; If they are different, the average brightness of the monochromatic light of each display partition is correspondingly determined as the monochromatic target brightness of each display partition.

7. The brightness compensation method of a display panel according to any one of claims 2 to 6, characterized in that: The monochrome picture includes a first color picture, a second color picture and a third color picture; the monochrome light brightness change trend includes a first color light brightness change trend, a second color light brightness change trend and a third color light brightness change trend of the gray scale of the binding point; The step of determining the monochrome target brightness of the binding point grayscale of each display partition of the display panel by comparing the white light brightness change trend and the monochrome light brightness change trend after voltage drop compensation includes: By comparing the brightness variation trend of white light after voltage drop compensation with the brightness variation trend of each color light, the target brightness of the binding point gray scale of each color sub-pixel in each display partition of the display panel is determined.

8. The brightness compensation method of a display panel according to claim 7, characterized in that: The step of performing brightness compensation on sub-pixels of corresponding colors in each display partition according to the monochrome target brightness of the binding point grayscale of each display partition includes: Determine the brightness compensation value of the binding point grayscale of each sub-pixel in each display partition according to the target brightness of the binding point grayscale of each sub-pixel in each display partition, and store it in the display panel; The brightness compensation value of the binding point grayscale of each sub-pixel in each display partition is obtained, and each grayscale brightness of the corresponding sub-pixel is compensated according to the brightness compensation value of the binding point grayscale of each sub-pixel.

9. A brightness compensation device for a display panel, characterized in that: include: A data acquisition unit, used to acquire brightness data of a white picture of a preset gray scale and brightness data of a monochrome picture of a binding point gray scale of the display panel after voltage drop compensation; A data processing unit, used for performing partition processing on the brightness data of the white picture to determine a change trend of the white light brightness of the display panel after voltage drop compensation; as well as, Performing partition processing on the brightness data of the monochrome picture to determine the monochrome brightness change trend of the display panel after voltage drop compensation; a target brightness determination unit, which determines the monochrome target brightness of the binding point grayscale of each display partition of the display panel by comparing the white light brightness change trend and the monochrome light brightness change trend after voltage drop compensation; The compensation unit is used to perform brightness compensation on the sub-pixels of the corresponding colors in each display partition according to the monochrome target brightness of the binding point grayscale of each display partition.

10. A display device, characterized in that: include: Display panel; as well as at least one processor and a memory communicatively connected to the at least one processor; wherein, The memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can perform brightness compensation by executing the brightness compensation method for a display panel according to any one of claims 1 to 8.

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