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

Abstract

The application discloses a display panel brightness compensation method, a display panel brightness compensation device and a display device. The display panel brightness compensation method comprises the following steps: acquiring brightness data of a white picture of a preset gray scale and brightness data of a single-color picture of a binding point gray scale of a 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 single-color picture to determine a single-color light brightness change trend of the display panel after voltage drop compensation; comparing the white light brightness change trend after voltage drop compensation with the single-color light brightness change trend to determine single-color target brightness of the binding point gray scale of each display partition of the display panel; and performing brightness compensation on sub-pixels of corresponding colors in each display partition according to the single-color target brightness of the binding point gray scale of each display partition. The technical scheme provided by the application improves the display effect of the display panel.

Description

Technical Field

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

[0002] With the development of display technology, people's requirements for picture display quality are getting higher and higher.

[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] Acquiring brightness data of a white picture of a preset grayscale and brightness data of a monochrome picture of a bounding point grayscale displayed by the display panel after voltage drop compensation;

[0007] Performing partition processing on the brightness data of the white screen 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 a 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 monochromatic 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 color in each display partition.

[0011] Optionally, the acquiring of brightness data of a white picture of a preset grayscale and brightness data of a monochrome picture of a bounding point grayscale 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 image of a preset grayscale, and detecting brightness data of each sub-pixel in the white image;

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

[0015] Preferably, the preset gray scale includes a maximum display gray scale of the display panel; and the binding point gray scale includes all binding point gray scales of the display panel.

[0016] Optionally, the partitioning the luminance data of the white picture to determine the white light luminance variation trend of the display panel after the voltage drop compensation comprises:

[0017] dividing the luminance data of the white picture of the display panel according to M*N display partitions to determine the white light luminance 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] performing mean value calculation on the white light luminance data of each display partition by a preset mean value algorithm to obtain the white light average luminance of each display partition;

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

[0020] The partitioning the luminance data of the single-color picture to determine the single-color light luminance variation trend of the display panel after the voltage drop compensation comprises:

[0021] dividing the luminance data of the single-color picture of the display panel according to M*N display partitions to determine the single-color light luminance data of each display partition;

[0022] performing mean value calculation on the single-color light luminance data of each display partition by a preset mean value algorithm to obtain the single-color light average luminance of each display partition;

[0023] determining the single-color light luminance variation trend of the display panel after the voltage drop compensation according to the single-color light average luminance 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 performing mean value calculation on the white light luminance data of each display partition by a preset mean value algorithm to obtain the white light average luminance of each display partition comprises:

[0026] performing step-by-step mean value calculation on the white light luminance data of each display partition according to a first preset calculation unit to obtain the white light average luminance of each display partition;

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

[0028] taking the white light average luminance of a center display partition located in the center region of the display panel as a white light reference luminance;

[0029] 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, a white light brightness gain value of each display partition outside the central display partition relative to the central display partition is calculated;

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

[0031] Optionally, the mean value calculation on the monochromatic light brightness data of each display partition to obtain the monochromatic light average brightness of each display partition comprises:

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

[0033] According to the monochromatic light average brightness of each display partition, a monochromatic light brightness variation trend of the display panel after voltage drop compensation is determined, comprising:

[0034] The monochromatic light average brightness of the central display partition located in the central region of the display panel is taken as a monochromatic light reference brightness;

[0035] 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, a monochromatic light brightness gain value of each display partition outside the central display partition relative to the central display partition is calculated;

[0036] According to the monochromatic light brightness gain value of each display partition outside the central display partition, a 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 after voltage drop compensation with the monochromatic light brightness variation trend, a monochromatic target brightness of the bind point gray scale of each display partition of the display panel is determined, comprising:

[0038] It is judged whether the white light brightness variation trend after voltage drop compensation and the monochromatic light brightness variation trend are the same;

[0039] If the same, the monochromatic light average brightness of the central display partition located in the central region of the display panel is determined as the monochromatic target brightness of each display partition;

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

[0041] Optionally, the single-color picture comprises a first-color picture, a second-color picture and a third-color picture; and the single-color light brightness variation trend comprises a first-color light brightness variation trend, a second-color light brightness variation trend and a third-color light brightness variation trend of the bind point gray scale.

[0042] By comparing the white light brightness variation trend after pressure drop compensation with the single-color light brightness variation trend, the single-color target brightness of the bind point gray scale of each display partition of the display panel is determined, comprising:

[0043] By comparing the white light brightness variation trend after pressure drop compensation with the single-color light brightness variation trend, the single-color target brightness of the bind point gray scale of each display partition of the display panel is determined, comprising:

[0044] Optionally, the brightness compensation of the corresponding color sub-pixel in each display partition according to the single-color target brightness of the bind point gray scale of each display partition comprises:

[0045] According to the target brightness of the bind point gray scale of each color sub-pixel of each display partition, the brightness compensation value of the bind point gray scale of each sub-pixel of each display partition is determined and stored in the display panel;

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

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

[0048] A data acquisition unit is configured to acquire the brightness data of the white picture of the preset gray scale of the display panel after pressure drop compensation and the brightness data of the single-color picture of the bind point gray scale;

[0049] A data processing unit is configured to perform partition processing on the brightness data of the white picture, and determine the white light brightness variation trend of the display panel after pressure drop compensation; and

[0050] The brightness data of the single-color picture is processed by partition, and the single-color light brightness variation trend of the display panel after pressure drop compensation is determined;

[0051] A target brightness determination unit is configured to determine the single-color target brightness of the bind point gray scale of each display partition of the display panel by comparing the white light brightness variation trend after pressure drop compensation with the single-color light brightness variation trend;

[0052] A compensation unit is configured to perform brightness compensation on the corresponding color sub-pixel in each display partition according to the single-color target brightness of the bind point gray scale of each display partition.

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

[0054] a display panel; and

[0055] at least one processor and a memory connected to the at least one processor in communication; 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 to enable the at least one processor to perform the brightness compensation method of the display panel according to any one of the embodiments of the present application to perform brightness compensation.

[0057] The embodiments of the present application provide a brightness compensation method of a display panel, a brightness compensation device and a display device, wherein the brightness compensation method of the display panel comprises the following steps: obtaining brightness data of a white picture of a preset gray scale and brightness data of a single-color picture of a binding point gray scale of the display panel after voltage drop compensation; performing partition processing on the brightness data of the white picture to determine a white light brightness variation trend of the display panel after voltage drop compensation; performing partition processing on the brightness data of the single-color picture to determine a single-color light brightness variation trend of the display panel after voltage drop compensation; comparing the white light brightness variation trend after voltage drop compensation with the single-color light brightness variation trend to determine a single-color target brightness of the binding point gray scale of each display partition of the display panel; and performing brightness compensation on sub-pixels of corresponding colors in each display partition according to the single-color target brightness of the binding point gray scale of each display partition. The technical scheme provided by the embodiments of the present application compares the white light brightness variation trend after voltage drop compensation (IR_Drop compensation) with the single-color light brightness variation trend to determine a target value of Demura compensation, improves the problem that Demura compensation affects the result of IR_Drop compensation, and thus guarantees the brightness uniformity and chroma uniformity of the display panel and improves the display effect of the display panel.

[0058] It should be understood that the content described in this part is not intended to identify key or important features of the embodiments of the present application, nor is it used to limit the scope of the present application. Other features of the present application will become apparent from the following description. BRIEF DESCRIPTION OF DRAWINGS

[0059] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0060] Figure 1 is a flowchart of a brightness compensation method of a display panel provided by the embodiments of the present application;

[0061] Figure 2 is a schematic diagram of a display area division method of a display panel provided by an embodiment of the present application;

[0062] Figure 3 is a flowchart of step S110 in a display panel brightness compensation method provided by an embodiment of the present application;

[0063] Figure 4 is a flowchart of step S120 in a display panel brightness compensation method provided by an embodiment of the present application;

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

[0065] Figure 6 is a flowchart of another display panel brightness compensation method provided by an embodiment of the present application;

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

[0067] In order to make the personnel in the art better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by the personnel in the art without creative labor should belong to the scope of protection of the present application.

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

[0069] In the process of implementing the present application, the inventors found that in the related art, with the development of display technology, people's requirements for picture display quality are getting higher and higher. In order to improve the display effect, the related art usually repairs the effect of the defective panel through the IR_Drop / Demura algorithm, 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 problem is that after the uniformity compensation of the display panel, the white brightness trend and the single-color brightness trend are inconsistent. When the white and single-color brightness trends are inconsistent, the Demura compensation will affect the IR_Drop compensation result, so there is a problem of reduced brightness uniformity and deteriorated chroma uniformity, which reduces the display effect of the display panel.

[0070] In view of the above research findings of the inventors, the embodiments of the present application provide a brightness compensation method of a display panel, comprising:

[0071] S110, obtaining the brightness data of the white picture of the display panel displaying a preset gray scale after pressure drop compensation and the brightness data of the single-color picture of the binding point gray scale.

[0072] Specifically, there is an IR Drop (voltage drop) in the display panel. Specifically, because of the difference in the physical positions of different sub-pixels, the current receives different wiring resistances in the transmission process, so the current size of different physical positions is inconsistent, and the voltage drop phenomenon occurs. The IR Drop mainly manifests as the phenomenon of gradual change of brightness at the far IC end and the near IC end. The far IC end can be understood as the end of the display panel far from the driving chip (IC), and the near IC end can be understood as the end of the display panel close to the driving 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 pressure drop compensation of 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 pressure drop compensation. After the pressure drop compensation of the display panel, the display panel is controlled to display a single-color picture of a binding point gray scale, and the brightness data of the single-color picture is detected, so as to obtain the brightness data of the single-color picture of the binding point gray scale displayed by the display panel after the pressure drop compensation. That is, on the basis of IR_Drop compensation, the single-color optical data required for Demura compensation is collected.

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

[0075] Specifically, the display area of the display panel is divided into a plurality of display sub-areas. For example, Figure 2 is a schematic diagram of a display area division method provided by an embodiment of the present application, Figure 2 is shown as an example. It should be noted that the number of display sub-areas in the display area of the display panel is not limited to 15, and can be other numbers, such as 9, 21, or 25, etc. The present application embodiment does not limit this. The more the number of display sub-areas in the display area, that is, the more refined the display sub-area division, the better the final brightness compensation effect. However, the more the number of display sub-areas in the display area, the more the number of target brightness of each sub-area that needs to be obtained, and the calculation amount will also increase accordingly. Therefore, the number of display sub-areas in the display area can be flexibly selected according to actual conditions.

[0076] The brightness data of the white picture is processed in the display area division manner to obtain the brightness value of each display sub-area, so that the white light brightness variation trend of the display panel after voltage drop compensation can be determined. After voltage drop compensation is performed on the display panel, the brightness uniformity of the display panel displaying the white picture is improved, but due to the reasons such as compensation accuracy, process instability, etc., there may still be a white light brightness variation trend, that is, the brightness gradually decreases along the direction X away from the driving chip 200 (IC). Figure 2

[0077] Specifically, the brightness data of the white picture can be processed in the display area division manner to process the brightness data of the monochromatic picture, so as to determine the monochromatic light brightness variation trend of the display panel after voltage drop compensation. It should be noted that the display panel can include first color sub-pixels emitting first color light, second color sub-pixels emitting second color light, and third color sub-pixels emitting third color light. Correspondingly, the monochromatic picture includes a first color picture, a second color picture, and a third color picture; and the monochromatic light brightness variation trend includes a first color light brightness variation trend, a second color light brightness variation trend, and a third color light brightness variation trend of the bind point gray scale. For example, the display panel can include red sub-pixels emitting red light, green sub-pixels emitting green light, and blue sub-pixels emitting blue light. Correspondingly, the monochromatic picture can be a red picture, a green picture, and a blue picture; and the monochromatic light brightness variation trend includes a red light brightness variation trend, a green light brightness variation trend, and a blue light brightness variation trend of the bind point gray scale.

[0078] S130, determining the monochromatic target brightness of the bind point gray scale of each display sub-area of the display panel by comparing the white light brightness variation trend after voltage drop compensation with the monochromatic light brightness variation trend.

[0079] ​Specifically, the white light brightness variation trend of the obtained preset gray scale white picture is compared with the brightness variation trend of the single-color picture of the binding point gray scale, and the comparison result is output to the algorithm end. For example, if the brightness variation trends are the same, the output comparison result is 1, and if the brightness variation trends are different, the output comparison result is 0. It can be roughly determined whether the white light brightness variation trend and the single-color light brightness variation trend are the same, for example, the white light brightness variation trend is along the direction away from the driving chip 200 (IC), and the brightness gradually decreases; if the single-color light brightness variation trend is also along the direction away from the driving chip (IC), and the brightness gradually decreases, it can be determined that the white light brightness variation trend and the single-color light brightness variation trend are the same, otherwise they are different.

[0080] The preset algorithm can also be set to accurately determine the white light brightness variation trend and the single-color light brightness variation trend, for example, the white light brightness variation trend is along the direction away from the driving chip 200 (IC), and the brightness gradually decreases; if the single-color light brightness variation trend is along the direction away from the driving chip (IC), and the brightness gradually decreases, and the difference between the white light brightness of the adjacent two display partitions and the difference between the single-color light brightness are in the same preset interval range, then it is determined that the white light brightness variation trend and the single-color light brightness variation trend are the same, otherwise they are different. The judgment condition of the white light brightness variation trend and the single-color light brightness variation trend can be determined according to actual needs. The way to determine the single-color target brightness when the white light and the single-color light have the same brightness variation trend is different from the way to determine the single-color target brightness when the white light and the single-color light have different brightness variation trends.

[0081] S140, according to the single-color target brightness of the binding point gray scale of each display partition, the brightness of the corresponding color sub-pixel in each display partition is compensated.

[0082] Specifically, the single-color target brightness of each display partition of a binding point gray scale is determined, that is, the target brightness of the corresponding color sub-pixel in each display partition when displaying the binding point gray scale is determined. The single-color target brightness of part or all of the binding point gray scales can be determined, and the single-color target brightness of the non-binding point gray scale can be obtained by difference algorithm, so that the single-color target brightness corresponding to each gray scale can be determined. The brightness data of each single-color picture of the display panel when displaying the binding point gray scale is obtained, the brightness data of each single-color picture is partitioned, and the brightness variation trend of each single-color picture of the display panel after voltage drop compensation when displaying the binding point gray scale can be determined; by comparing the white light and the single-color light brightness variation trend, the target brightness 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 realize the brightness compensation of the sub-pixel.

[0083] The brightness compensation method of the display panel provided by the embodiment of the present application comprises: obtaining the brightness data of a white picture of a preset gray scale and the brightness data of a monochrome picture of a bind point gray scale of the display panel after voltage drop compensation; performing partition processing on the brightness data of the white picture to determine the white light brightness variation 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 variation trend of the display panel after voltage drop compensation; and determining the monochrome target brightness of the bind point gray scale of each display partition of the display panel by comparing the white light brightness variation trend after voltage drop compensation with the monochrome light brightness variation trend. The embodiment of the present application determines the monochrome target brightness of the bind point gray scale of each display partition of the display panel in different ways when the white light brightness variation trend is the same as or different from the monochrome light brightness variation trend, so that the display panel can be compensated by Demura according to the brightness trends of the white light and the monochrome light, thereby improving the problem that the Demura compensation affects the IR_Drop compensation result when the white light brightness variation trend is different from the monochrome light brightness variation trend.

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

[0085] In an embodiment of the present application, Figure 3 is a flowchart of step S110 in a brightness compensation method of a display panel provided by the embodiment of the present application, referring to Figure 3 , step S110 obtains the brightness data of a white picture of a preset gray scale and the brightness data of a monochrome picture of a bind point gray scale of the display panel after voltage drop compensation, comprising:

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

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

[0088] S103, controlling the display panel to display a monochrome picture of a bind point gray scale, and detecting the brightness data of each sub-pixel in the monochrome picture; wherein the bind point gray scale comprises all the bind point gray scales of the display panel.

[0089] Specifically, the greater the current flowing through the sub-pixel, the greater the brightness of the sub-pixel. Therefore, the greater the brightness of the white picture displayed by the display panel, the greater the difference in the voltage drop generated at the sub-pixels at different positions, and the worse the brightness uniformity of the white picture. Therefore, when collecting the brightness data of the white picture of the preset gray scale, the preset gray scale can be a gray scale in a high gray scale range. In the embodiment of the present application, the display panel displays a white picture of the maximum gray scale, 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. Wherein, the display panel displays the maximum gray scale, for example, can be 255 gray scale. When controlling the display panel to display the single-color picture of the tie-in gray scale, the display panel can be controlled to display the single-color picture of each color of each tie-in gray scale in turn, which can further improve the compensation effect after Demura compensation. For example, 5 gray scales of 16 gray scales, 32 gray scales, 96 gray scales, 192 gray scales and 255 gray scales can be preset as tie-in gray scales.

[0090] On the basis of any of the above embodiments, in an embodiment of the present application, Figure 4 is a flowchart of step S120 in a brightness compensation method of a display panel provided by an embodiment of the present application, referring to Figure 4 , the brightness data of the white picture in step S120 is processed in zones to determine the brightness variation trend of the white light of the display panel after voltage drop compensation, specifically including:

[0091] S201, dividing the brightness data of the white picture of the display panel according to M*N display zones to determine the white light brightness data of each display zone; wherein M is the number of columns of the display zone, and N is the number of rows of the display zone.

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

[0093] S202, performing mean value calculation on the white light brightness data of each display zone by a preset mean value algorithm to obtain the average brightness of the white light of each display zone.

[0094] Specifically, the preset mean value algorithm can be understood as an algorithm for calculating the average value of the white light or single-color light emitted by the display zone.

[0095] The method for averaging the white light brightness data of the display partition can comprise: summing the brightness data of each sub-pixel in the display partition to obtain a brightness sum; and obtaining the white light average brightness of the display partition according to 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 averaging algorithm to obtain the white light average brightness of each display partition, and the method can further comprise: calculating the white light brightness data of each display partition according to a step-by-step averaging algorithm to obtain the white light average brightness of each display partition.

[0097] Specifically, each display partition is further divided step by step according to the preset division manner, wherein the number of steps can be set according to actual requirements, and the division manner can be the same or different at different steps; the smallest region (the last step) after the step-by-step division comprises at least two white light brightness data (the brightness data of two sub-pixels). For example, each display partition is further divided D times, and the last step is the Dth step. Then, the average brightness of each region obtained by the last step division is calculated by taking the region divided by the last step as a calculation unit. Then, the average brightness of each region obtained by the D-1th step division is calculated by taking the region divided by the D-1th step as a calculation unit. Then, the average brightness of each region obtained by the D-2th step division is calculated by taking the region divided by the D-2th step as a calculation unit. In this way, the average brightness of each region obtained by the 1st step division is calculated, and the white light average brightness of the display partition is obtained. The brightness data in the display partition is calculated by using the step-by-step calculation manner, which can improve the accuracy of the data and more accurately express the brightness trend of the panel.

[0098] Taking the resolution of the display panel as 1080*2400, the display panel is divided into 3 columns and 5 rows of display partitions, and the step-by-step averaging algorithm of 3*3 sub-blocks is performed on the brightness data of each display partition in the 3 columns and 5 rows of display partitions to obtain the brightness average of each display partition. For example, the display area of the display panel is divided into 15 display partitions, and each display partition comprises 360*480 sub-pixels. Then, the 3*3 sub-block division is performed on the brightness data of the 250*480 sub-pixels of each display partition, and each display partition obtains 9 sub-blocks, each of which comprises the brightness data of 120*160 sub-pixels. The last step is the 2nd step, and the average value of the brightness data of 120*160 sub-pixels in each region is calculated by taking the region divided by the 2nd step as a calculation unit, and then 9 data corresponding to the brightness data of the 9 sub-blocks are obtained. Then, the white light average brightness of the display partition is obtained by averaging the 9 data.

[0099] Of course, the 2*2 sub-block progressive average algorithm can be performed on the luminance data in the 3-column 5-row display partition, and the number of hierarchical divisions can be increased. Alternatively, after two 3*3 sub-block divisions are performed on the display partition, the 4*4 sub-block division is continued. The embodiments of the present application do not limit this.

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

[0101] Optionally, the white light luminance variation trend of the display panel after the voltage drop compensation is determined according to the white light average luminance of each display partition, including:

[0102] The white light average luminance of the center display partition located in the center region of the display panel is taken as the white light reference luminance;

[0103] The white light luminance gain value of each display partition outside the center display partition relative to the center display partition is calculated according to the white light average luminance of each display partition outside the center display partition, the white light reference luminance, and a preset luminance gain calculation formula;

[0104] The white light luminance variation trend of the display panel after the voltage drop compensation is determined according to the white light luminance gain value of each display partition outside the center display partition.

[0105] For example, referring to Figure 2 The white light average luminance of the center display partition located in the center region of the display panel is taken as the white light reference luminance, which can normalize the white light average luminance of the center display partition to 1. The white light luminance gain value of each display partition outside the center display partition relative to the center display partition is calculated according to the white light average luminance of each display partition outside the center display partition, the white light reference luminance, and a preset luminance gain calculation formula. The luminance gain formula can be L 增益 = L 白 / L 白-中心 . L 白 is the white light average luminance of a display partition outside the center display partition, L 白-中心 is the white light average luminance of the center display partition, and L 增益 is the white light luminance gain value of the display partition.

[0106] On the basis of any of the above embodiments, in an embodiment of the present application, Figure 5 is another flowchart of step S120 in a luminance compensation method of a display panel provided by an embodiment of the present application, referring to Figure 5 , the luminance data of the monochrome picture is partitioned and processed in step S120 to determine the monochrome light luminance variation trend of the display panel after the voltage drop compensation, specifically including:

[0107] S301, divide the luminance data of the monochrome picture of the display panel according to the display partitions of M*N, and determine the monochrome light luminance data of each display partition.

[0108] S302, calculate the average of the monochrome light luminance data of each display partition by a preset average algorithm to obtain the average monochrome light luminance of each display partition.

[0109] Specifically, the average of the monochrome light luminance data of the display partition can be calculated by calculating the luminance data of the sub-pixels corresponding to the color in the display partition to obtain the luminance sum; and then the average monochrome light luminance of the display partition corresponding to the color is obtained according to the ratio of the luminance sum to the total number of sub-pixels corresponding to the color in the display partition. For example, the red luminance sum is calculated according to the luminance data of the red sub-pixels in the display partition, and then the average red light luminance of the display partition is obtained according to the ratio of the red luminance sum to the total number of red sub-pixels in the display partition; the green luminance sum is calculated according to the luminance data of the green sub-pixels in the display partition, and then the average green light luminance of the display partition is obtained according to the ratio of the green luminance sum to the total number of green sub-pixels in the display partition; the blue luminance sum is calculated according to the luminance data of the blue sub-pixels in the display partition, and then the average blue light luminance of the display partition is obtained according to the ratio of the blue luminance sum to the total number of blue sub-pixels in the display partition.

[0110] Optionally, the average of the monochrome light luminance data of each display partition is calculated by a preset average algorithm to obtain the average monochrome light luminance of each display partition, including: calculating the average of the monochrome light luminance data of each display partition according to a step-by-step progressive average algorithm to obtain the average monochrome light luminance of each display partition.

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

[0112] S303, determine the monochrome light luminance change trend of the display panel after pressure drop compensation according to the average monochrome light luminance of each display partition.

[0113] Optionally, the monochrome light luminance change trend of the display panel after pressure drop compensation is determined according to the average monochrome light luminance of each display partition, including:

[0114] The average monochrome light luminance of the center display partition located in the center display partition of the display panel is taken as the monochrome light reference luminance;

[0115] 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, the monochromatic light brightness gain value of each display partition outside the central display partition relative to the central display partition is calculated.

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

[0117] The specific determination manner can refer to the step S203, and will not be described here.

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

[0119] On the basis of any of the above embodiments, in an embodiment of the present application, Figure 6 is a flowchart of another brightness compensation method of the display panel provided by the embodiment of the present application, which refers to Figure 6 , the step S130 determines the monochromatic target brightness of each display partition of the display panel by comparing the white light brightness change trend after the voltage drop compensation with the monochromatic light brightness change trend, including:

[0120] S401, it is judged whether the white light brightness change trend after the voltage drop compensation is same as the monochromatic light brightness change trend; if yes, the step S402 is executed; if no, the step S403 is executed.

[0121] S402, the monochromatic light average brightness of the central display partition located in the central area of the display panel is determined as the monochromatic target brightness of each display partition.

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

[0123] Specifically, it is judged whether the white light brightness change trend after the pressure drop compensation is same as the monochromatic light brightness change trend. If yes, the monochromatic light average brightness of the center display partition located in the center area of the display panel is taken as the monochromatic target brightness of each display partition. It is to be noted that each binding point gray scale corresponds to a first color target brightness, a second color target brightness and a third color target brightness. During compensation, the brightness of the sub-pixel of the corresponding color in each display partition is compensated according to the monochromatic target brightness of the binding point gray scale of the center display partition. If not, the monochromatic light average brightness of each display partition is determined as the monochromatic target brightness of each display partition. That is, the monochromatic light average brightness of the display partition 1 is taken as the target brightness of the sub-pixel of the corresponding color in the display partition 1; the monochromatic light average brightness of the display partition 2 is taken as the target brightness of the sub-pixel of the corresponding color in the display partition 2, and so on. Similarly, each binding point gray scale corresponds to a first color target brightness, a second color target brightness and a third color target brightness. During compensation, the brightness of the sub-pixel of the corresponding color in each display partition is compensated according to the monochromatic target brightness of the binding point gray scale of each display partition.

[0124] On the basis of any of the above embodiments, the brightness of the sub-pixel of the corresponding color in each display partition is compensated according to the monochromatic target brightness of the binding point gray scale of each display partition, comprising:

[0125] The target brightness of the binding point gray scale of each sub-pixel in each display partition is determined, and the brightness compensation value of the binding point gray scale of each sub-pixel in each display partition is stored in the display panel;

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

[0127] Figure 7 is a structural block diagram of a brightness compensation device of a display panel provided by an embodiment of the present application, referring to Figure 7 , the brightness compensation device of the display panel comprises:

[0128] The data acquisition unit 10 is used for acquiring the brightness data of the white picture of the preset gray scale and the brightness data of the monochromatic picture of the binding point gray scale of the display panel after pressure drop compensation;

[0129] The data processing unit 20 is used for partition processing the brightness data of the white picture, determining the white light brightness change trend of the display panel after pressure drop compensation; and

[0130] partition processing the brightness data of the monochromatic picture, determining the monochromatic light brightness change trend of the display panel after pressure drop compensation;

[0131] The target brightness determination unit 30 determines the monochromatic target brightness of the white point gray scale of each display partition by comparing the white light brightness change trend after pressure drop compensation with the monochromatic light brightness change trend.

[0132] The compensation unit 40 is configured to perform brightness compensation on the sub-pixels of the corresponding color in each display partition according to the monochromatic target brightness of the white point gray scale of each display partition.

[0133] The brightness compensation device of the display panel provided by the embodiments of the present application can perform the brightness compensation method of the display panel provided by any of the embodiments of the present application, and has the corresponding function modules and beneficial effects of the execution method.

[0134] The embodiments of the present application further provide a display panel, which is subjected to brightness compensation by the brightness compensation method of the display panel according to any of the embodiments of the present application. The same technical effects are achieved, and thus will not be described here.

[0135] The embodiments of the present application further provide a display panel device, which comprises a display panel, at least one processor and a memory in communication connection with 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 to enable the at least one processor to perform brightness compensation by the brightness compensation method of the display panel according to any of the embodiments of the present application. The same technical effects are achieved, and thus will not be described here.

[0136] It should be noted that the above only describes the preferred embodiments of the present application and the technical principles applied. Those skilled in the art will understand that the present application is not limited to the specific embodiments described herein, and those skilled in the art can make various obvious changes, re-adjustments and substitutions without departing from the protection scope of the present application. Therefore, although the present application has been described in more detail through the above embodiments, the present application is not limited to the above embodiments, and can include more other equivalent embodiments without departing from the concept of the present application, and the scope of the present application is determined by the appended claims.

Claims

1. A brightness compensation method for a display panel, characterized in that: include: Acquiring brightness data of a white picture of a preset grayscale and brightness data of a monochrome picture of a bounding point grayscale displayed by the display panel after voltage drop compensation; Performing partition processing on the brightness data of the white image to determine a brightness change trend of white light of the display panel after voltage drop compensation, and performing partition processing on the brightness data of the monochrome image to determine a brightness change trend of 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 monochromatic 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 color in each display partition.

2. The brightness compensation method of a display panel according to claim 1, wherein: The obtaining of brightness data of a white picture of a preset grayscale and brightness data of a monochrome picture of a bounding point grayscale 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 image of a preset grayscale, and detecting brightness data of each sub-pixel in the white image; The display panel is controlled to display a monochrome picture with a tied-dot grayscale, and brightness data of each sub-pixel in the monochrome picture is detected.

3. The brightness compensation method of a display panel according to claim 2, wherein: The preset grayscale includes the maximum display grayscale of the display panel; the binding point grayscale includes all binding point grayscales of the display panel.

4. The brightness compensation method of a display panel according to claim 2, wherein: 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 change 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 brightness change trend of the monochrome light of the display panel after voltage drop compensation includes: Dividing the brightness data of the monochrome image of the display panel into M*N display partitions, and determining the monochrome brightness data of each display partition; The monochromatic 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; According to the average brightness of the monochromatic light of each display subarea, a brightness variation trend of the monochromatic light of the display panel after voltage drop compensation is determined.

5. The brightness compensation method of a display panel according to claim 4, wherein: M is an odd number greater than 1, and N is an odd number greater than 1.

6. The brightness compensation method of a display panel according to claim 4, wherein: The method of performing mean calculation on 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 the step-by-step average algorithm to obtain the average white light brightness of each display partition; The determining, based on the average white light brightness of each display partition, a white light brightness change trend of the display panel after voltage drop compensation, includes: 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; Calculating the white light brightness gain value of each display partition outside the central display partition relative to the central display partition based on 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; The white light brightness change trend of the display panel after voltage drop compensation is determined according to the white light brightness gain value of each display partition outside the central display partition.

7. The brightness compensation method of a display panel according to claim 4, wherein: The method of performing mean calculation on the monochromatic brightness data of each display partition by using a preset mean algorithm to obtain the monochromatic average 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 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 includes: taking the average brightness of the monochromatic light of the central display subarea located in the central area of ​​the display panel as the monochromatic light reference brightness; Calculating the monochromatic light brightness gain value of each display partition outside the central display partition relative to the central display partition based on 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; The monochromatic light brightness variation trend of the display panel after voltage drop compensation is determined according to the monochromatic light brightness gain value of each display subarea outside the central display subarea.

8. The brightness compensation method of a display panel according to claim 4, wherein: The determining of 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 partition located in the central area of ​​the display panel is determined as the monochromatic target brightness of each display partition; 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.

9. The brightness compensation method for a display panel according to any one of claims 2 to 8, wherein: 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; The determining of 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 grayscale of each color sub-pixel in each display partition of the display panel is determined.

10. The brightness compensation method of a display panel according to claim 9, wherein: 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.

11. A brightness compensation device for a display panel, characterized in that: include: a data acquisition unit, configured to acquire brightness data of a white picture of a preset grayscale and brightness data of a monochrome picture of a tied-dot grayscale of the display panel after voltage drop compensation; a data processing unit, configured to perform partition processing on the brightness data of the white screen 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 brightness change trend of the monochrome light 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.

12. 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 10.

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