Display panel brightness adjustment method and apparatus, electronic device, and storage medium

Abstract

The present application discloses a display panel brightness adjustment method and apparatus, an electronic device, and a storage medium. On the basis of backlight brightness and a pixel grayscale value of each pixel of a next picture frame to be displayed in a target area of a display panel, at least one brightness adjustment strategy for the target area is determined; the brightness adjustment strategy is screened on the basis of a gray-to-gray response time of each pixel adjusted on the basis of the brightness adjustment strategy, to determine a target adjustment strategy for the target area of the display panel.

Description

Display panel brightness adjustment method, device, electronic device and storage medium

[0001] This application claims priority to Chinese patent application No. 202311476998.8 filed on November 3, 2023, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of display technology. Background Art

[0003] With the development of VR (Virtual Reality) display technology, screen requirements are becoming increasingly stringent, requiring higher spatial resolution and brightness for superior display quality. Traditional LCD (Liquid Crystal Display) panel technology significantly reduces light efficiency due to the presence of color filters. This has led to the emergence of field-sequential color display, which uses temporal color switching to achieve color display. This method achieves three times the spatial resolution of conventional LCDs while significantly reducing light loss. Combined with MiniLED (sub-millimeter light-emitting diode) backlight technology, field-sequential solutions are being applied to VR displays, achieving lower power consumption, higher contrast, and higher spatial resolution. However, field-sequential color display requires a sufficiently fast response time of the liquid crystal, otherwise color mixing will occur. Specifically, if the liquid crystal transmittance of the next frame changes with the current frame under certain conditions, the response time will be slower, preventing the liquid crystal from switching quickly, resulting in color shift. SUMMARY OF THE INVENTION

[0004] The combination of LCD (Liquid Crystal Display) panel technology and MiniLED (Mini Light Emitting Diode) backlight technology has a color mixing phenomenon caused by slow response time.

[0005] In a first aspect, an embodiment of the present application provides a method for adjusting brightness of a display panel, comprising:

[0006] Obtaining display parameters of a next frame to be displayed in a target partition of the display panel, the target partition including a plurality of pixels, the display parameters including backlight brightness and a grayscale value of each pixel, and each pixel in the target partition corresponding to the backlight brightness;

[0007] determining at least one brightness adjustment strategy for the target subarea according to the backlight brightness and the pixel grayscale value of each of the pixels;

[0008] respectively obtaining a grayscale response time of each pixel adjusted based on the brightness adjustment strategy;

[0009] The brightness adjustment strategy is screened according to the grayscale response time to determine a target adjustment strategy for the target partition of the display panel.

[0010] In a second aspect, the present application provides a display panel brightness adjustment device, comprising:

[0011] an information acquisition module, configured to acquire display parameters of a next frame of an image to be displayed in a target partition of the display panel, wherein the target partition includes a plurality of pixels, and the display parameters include backlight brightness and a grayscale value of each pixel, wherein each pixel in the target partition corresponds to the backlight brightness;

[0012] a strategy analysis module, communicatively connected to the information acquisition module, and configured to determine at least one brightness adjustment strategy for the target partition based on the backlight brightness and the grayscale value of each pixel;

[0013] a parameter acquisition module, in communication with the strategy analysis module, for respectively acquiring a grayscale response time of each pixel adjusted based on the brightness adjustment strategy;

[0014] A strategy screening module is in communication with the strategy analysis module and the parameter acquisition module, and is configured to screen the brightness adjustment strategy according to the grayscale response time to determine a target adjustment strategy for the target partition of the display panel.

[0015] In a third aspect, the present application provides an electronic device comprising a processor, a memory, and a computer program stored in the memory and runnable on the processor, wherein the processor executes the computer program to implement the steps in any one of the display panel brightness adjustment methods.

[0016] In a fourth aspect, the present application provides a storage medium storing a plurality of instructions, wherein the instructions are used for execution by a controller to implement any one of the methods described. Beneficial effects

[0017] While ensuring the brightness of the image, it improves the color mixing phenomenon caused by slow response time. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The following detailed description of the specific embodiments of the present application in conjunction with the accompanying drawings will make the technical solutions and other beneficial effects of the present application apparent.

[0019] FIG1 is a schematic flow chart of a method for adjusting brightness of a display panel according to an embodiment of the present application;

[0020] FIG2 is a schematic diagram of backlight partitions of a display panel according to an embodiment of the present application;

[0021] FIG3 is a schematic diagram showing a backlight subarea including 100×100 pixels in an embodiment of the present application;

[0022] FIG4 is a schematic structural diagram of a display panel brightness adjustment device in an embodiment of the present application. Modes for Carrying Out the Invention

[0023] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts are within the scope of protection of this application.

[0024] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the described features. In the description of this application, "plurality" means two or more, unless otherwise specifically specified.

[0025] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections, electrical connections, or mutual communication; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to internal communication between two components or the interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0026] The disclosure below provides many different implementations or examples for implementing different structures of the present application. In order to simplify the disclosure of the present application, the components and settings of specific examples are described below. Of course, they are merely examples and are not intended to limit the present application. Those skilled in the art will understand that the embodiments of the present application can be modified or replaced by equivalents without departing from the spirit and scope of the present application, and such modifications or equivalent replacements should be included in the scope of the present application. In addition, each embodiment can be combined with each other but will not be described in detail one by one.

[0027] Field sequential color eliminates the color filter and uses three-color LEDs (Light Emitting Diodes) in the backlight to achieve color switching. This utilizes temporal frequency color switching and superposition to achieve color display. For example, if any pixel on the screen switches between R, G, and B fields at a frequency of 180 Hz, the overall display effect can be considered equivalent to a full-color display at 60 Hz.

[0028] Referring to FIG. 1 , an embodiment of the present application provides a method for adjusting brightness of a display panel. The method includes steps S101 to S104 , which are specifically as follows:

[0029] S101, obtaining display parameters of a next frame to be displayed in a target partition of a display panel, wherein the target partition includes a plurality of pixels, and the display parameters include backlight brightness and a grayscale value of each pixel, and each pixel in the target partition corresponds to the backlight brightness.

[0030] Specifically, the target partition is a portion of the display panel, including a plurality of pixels, and the backlight brightness corresponding to each pixel in the target partition is the same. The division of the target partition in the display panel is not specifically limited in this embodiment. The smaller the target partition, the better the adjustment effect of this embodiment.

[0031] The display parameters of the next frame to be displayed in the target partition of the display panel are obtained. The target partition is a partial area of ​​the display panel, so the next frame to be displayed in the target partition is only a partial picture that needs to be displayed by the display panel in the next frame.

[0032] Display parameters include backlight brightness and the grayscale value of each pixel. The backlight brightness corresponding to each pixel in the target partition is the same brightness, so each pixel in the target partition corresponds to the backlight brightness. The grayscale values ​​of different pixels may or may not be the same.

[0033] In one embodiment, the display panel implements local dimming by partitioning the backlight. That is, the backlight's lamp structure is divided into a number of backlight partitions at the hardware level. The lamps in each backlight partition are uniformly adjusted, and the backlight partition is the smallest adjustment unit for local dimming. In this embodiment, the smaller the target partition, the better the adjustment effect of this embodiment. Therefore, the target partition can be divided according to the backlight partition. The backlight partition can correspond one-to-one with the target partition, or a target partition can contain multiple adjacent backlight partitions. In addition, the display panel includes multiple target partitions. The sizes and shapes of different target partitions can be the same or different. This embodiment does not specifically limit this, but the brightness adjustment method of each target partition is the same.

[0034] S102: Determine at least one brightness adjustment strategy for the target subarea according to the backlight brightness and the grayscale value of each pixel.

[0035] Specifically, the backlight brightness is controlled by an algorithm, without the need to deflect the liquid crystal to a specified grayscale position. Instead, backlight compensation is used. Since the MiniLED backlight is partitioned, changing the backlight will also cause the brightness of all areas in the area to change. Therefore, grayscale compensation of the liquid crystal layer is also required to keep the brightness of each pixel in the picture unchanged. Therefore, under the premise of keeping the pixel brightness of each pixel unchanged, the brightness adjustment strategy of at least one target partition is determined based on the backlight brightness and the pixel grayscale value of each pixel. It should be noted that the brightness adjustment strategy of the target partition includes the display parameters of the next frame to be displayed in the target partition. That is, if a better adjustment strategy cannot be analyzed, the display parameters of the original next frame will be used as the brightness adjustment strategy.

[0036] In one embodiment, this step includes: S201, determining the pixel brightness value of each pixel based on the backlight brightness and the pixel grayscale value of each pixel; S202, keeping the pixel brightness value of each pixel unchanged, and determining at least one target adjustment strategy of the target pixel based on the target pixel brightness value of any target pixel in each pixel; S203, screening the target adjustment strategy of each pixel to determine at least one brightness adjustment strategy of the target partition.

[0037] Specifically, the pixel brightness value of each pixel is determined according to the backlight brightness and the pixel grayscale value of each pixel. The backlight brightness is set to LB, and the pixel grayscale value of a certain pixel is set to GrayB. Then the pixel brightness value LP of the pixel is LP=GrayB×LB.

[0038] Maintaining the pixel brightness value of each pixel unchanged, that is, maintaining LP unchanged, a new backlight brightness value LB and a new pixel grayscale value GrayB are determined. The target pixel is any pixel in the target partition, and the target pixel brightness value is the pixel brightness value of the target pixel. Based on the target pixel brightness value, at least one target adjustment strategy for the target pixel is determined. The target adjustment strategy includes the adjusted pixel brightness value and pixel grayscale value. The obtained target adjustment strategies are then screened to determine the brightness adjustment strategy for the target partition.

[0039] In one embodiment, step S202, keeping the pixel brightness value of each pixel unchanged, and determining at least one target adjustment strategy of the target pixel according to the target pixel brightness value of any target pixel in each pixel, includes: S301, obtaining the backlight brightness value of each backlight level of the display panel; S302, keeping the target pixel brightness value of the target pixel unchanged, and determining the theoretical grayscale value of the target pixel at each backlight brightness value according to the target pixel brightness value; S303, determining at least one target adjustment strategy of the target pixel according to the backlight brightness value and the theoretical grayscale value.

[0040] Specifically, the backlight level is the number of color transition steps on the display panel, determined by the color depth of the display panel. For example, an 8-bit display panel contains 256 backlight levels, which means that the display panel is divided into 256 backlight levels from dark to bright. This can be done evenly or unevenly across the brightness range of the display panel. Therefore, the backlight brightness value for each backlight level of the display panel is obtained. For example, for an 8-bit display panel, the backlight brightness value corresponding to each of the 256 backlight levels is obtained, i.e., all the adjustable backlight brightness values ​​for the target partition are obtained.

[0041] Maintaining the pixel brightness value of each pixel unchanged, the theoretical grayscale value of the target pixel at each backlight brightness value is determined based on the target pixel brightness value of any target pixel in each pixel. The backlight brightness value of the target pixel at a certain backlight level is set to LB_new, and the theoretical grayscale value of the target pixel at this backlight brightness value is set to GrayB_new. GrayB_new = LP / LB_new. Therefore, each target pixel obtains the same number of combinations of backlight brightness values ​​and theoretical grayscale values ​​as the backlight levels, where the combination of backlight brightness values ​​and theoretical grayscale values ​​comprises the display parameters of the next frame to be displayed in the target partition. At least one target adjustment strategy is determined for the target pixel based on the backlight brightness values ​​and theoretical grayscale values.

[0042] In one embodiment, step S303, determining at least one target adjustment strategy for the target pixel based on the backlight brightness value and the theoretical grayscale value, includes: S401, filtering the theoretical grayscale value according to the backlight level to obtain a compensated grayscale value; S402, determining at least one target adjustment strategy for the target pixel based on the backlight brightness value and the compensated grayscale value.

[0043] Specifically, while maintaining the brightness of each pixel, the theoretical grayscale value determined at each backlight brightness value may exceed the grayscale adjustment range. Therefore, the theoretical grayscale value needs to be filtered according to the backlight level to obtain a compensated grayscale value. For example, an 8-bit display panel has 256 backlight levels, and the pixel grayscale is set between 0 and 255. If the theoretical grayscale value exceeds the range of 0 to 255, the grayscale value and the corresponding backlight brightness value need to be filtered out.

[0044] For example, if the backlight brightness LB of a target pixel is set to 1000nit and the pixel grayscale value GrayB is set to 5, then the pixel brightness value LP=GrayB×LB=5000nit of the pixel. When the determined backlight brightness value LB_new is 10nit, the corresponding theoretical grayscale value GrayB_new=LP / LB_new=500, which obviously exceeds the range of 0 to 255. Therefore, the adjustment scheme with the backlight brightness value LB_new being 10nit and the theoretical grayscale value GrayB_new being 500 is filtered out. When the determined backlight brightness value LB_new is 500nit, the corresponding theoretical grayscale value GrayB_new=LP / LB_new=10, then the theoretical grayscale value of GrayB_new being 10 is determined as the compensated grayscale value.

[0045] The screened compensation grayscale value and the corresponding backlight brightness value are combined to determine a target adjustment strategy for the target pixel. When the backlight brightness LB of a target pixel is set to 1000nit and the pixel grayscale value GrayB is set to 5, the backlight brightness value LB_new is 1000nit and the theoretical grayscale value GrayB_new is 5, which is also a target adjustment strategy. Therefore, each target pixel has at least one target adjustment strategy.

[0046] In one embodiment, step S203, the target adjustment strategy of each pixel is screened to determine at least one brightness adjustment strategy of the target partition, including: S501, determining that the backlight brightness value existing in the target adjustment strategy of each pixel is the target backlight brightness value; S502, determining the target grayscale value of each pixel corresponding to the target backlight brightness value according to the target adjustment strategy of each pixel; S503, determining the brightness adjustment strategy of the target partition according to the target backlight brightness value and the target grayscale value.

[0047] Specifically, since the backlight brightness value of each pixel in the same target partition must be the same, the backlight brightness value existing in the target adjustment strategy of each pixel is determined to be the target backlight brightness value. Since the display parameters of the next frame to be displayed in the target partition are one of the target adjustment strategies for each pixel, the number of target backlight brightness values ​​is at least one.

[0048] The target grayscale value of each pixel corresponding to the target backlight brightness value is determined based on the target adjustment strategy of each pixel, and the brightness adjustment strategy of the target partition is determined according to the target backlight brightness value and the target grayscale value.

[0049] For example, the target partition contains two types of target pixels, namely target pixel A and target pixel B. The target adjustment strategy 1 of target pixel A is 1000nit+5 grayscale, target adjustment strategy 2 is 100nit+50 grayscale, and target adjustment strategy 3 is 500nit+10 grayscale. The target adjustment strategy 1 of target pixel B is 1000nit+10 grayscale, target adjustment strategy 2 is 100nit+100 grayscale, and target adjustment strategy 3 is 250nit+40 grayscale. The target adjustment strategies of target pixel A and target pixel B both include backlight brightness values ​​of 1000nit and 100nit. Therefore, the target backlight brightness values ​​of 1000nit and 100nit are determined. The brightness adjustment strategies of the target partition are brightness adjustment strategy 1 and brightness adjustment strategy 2. Brightness adjustment strategy 1 is 1000nit+target pixel A5 grayscale+target pixel B10 grayscale, and brightness adjustment strategy 2 is 100nit+target pixel A50 grayscale+target pixel B100 grayscale.

[0050] S103: Obtaining a grayscale response time of each pixel adjusted based on the brightness adjustment strategy.

[0051] Specifically, the grayscale response time of each pixel in the target partition when the current frame image is adjusted to the state of each brightness adjustment strategy is obtained, and each pixel under each brightness adjustment strategy corresponds to a grayscale response time.

[0052] VR GTG (grey to grey) grayscale response times exhibit certain regularities. For field-sequential displays, the GTG response time from 0% to 100% is generally important. The response time for any grayscale transition must meet the LCD deflection time allowed for each frame. Otherwise, color deviation and color mixing will occur. Table 1 below shows the measured 0-100% grayscale response time levels. The GTG maximum region occurs in the 0-95% grayscale transition range.

[0053] Table 1 0-100% grayscale response time

[0054]

[0055] In one embodiment, the brightness adjustment strategy includes the next backlight brightness value of the target partition and the next grayscale value of each of the pixels. This step includes: S601, obtaining the current grayscale value of each of the pixels in the current frame image displayed by the target partition of the display panel; S602, based on the brightness adjustment strategy, obtaining the response time of each of the pixels adjusting from the current grayscale value to the next grayscale value, and determining the response time as the grayscale response time of the next backlight brightness value.

[0056] Specifically, the brightness adjustment strategy includes the next backlight brightness value of the target partition and the next grayscale value of each pixel. The target backlight brightness value in the above embodiment is the next backlight brightness value of the target partition, and the target grayscale value of each pixel is the next grayscale value of each pixel.

[0057] The current grayscale value of each pixel in the current frame displayed by the target partition of the display panel is obtained. Based on the preset 0-100% grayscale response time mapping table, the response time of each pixel in each brightness adjustment strategy for adjusting from the current grayscale value to the next grayscale value is obtained. Thus, each next backlight brightness value, that is, the grayscale response time of each brightness adjustment strategy, is determined. The number of grayscale response times included in each brightness adjustment strategy is the same as the number of pixels included in the target partition. That is, when the target partition contains 100 pixels, each brightness adjustment strategy includes the response time of these 100 pixels.

[0058] S104 , screening the brightness adjustment strategy according to the grayscale response time, and determining a target adjustment strategy for the target partition of the display panel.

[0059] Specifically, the brightness adjustment strategies are screened based on the grayscale response time, and the brightness adjustment strategy with the shorter grayscale response time is determined as the target adjustment strategy for the target partition of the display panel. That is, while ensuring that the pixel brightness of each pixel in the target partition remains unchanged, the adjustment strategy with the faster liquid crystal response speed is selected. The target partitions of the display panel for uniformly adjusting the backlight brightness can all be brightness adjusted in the manner of the above embodiment, and this embodiment will not be further described one by one.

[0060] In one embodiment, this step includes: S701, counting the number of pixels in each brightness adjustment strategy whose grayscale response time is greater than or equal to a preset threshold; S702, determining the brightness adjustment strategy with the least number of pixels as the target adjustment strategy for the target partition of the display panel.

[0061] Specifically, a preset threshold for grayscale response time is set. When the grayscale response time of a pixel is greater than or equal to the preset threshold, it indicates that the liquid crystal deflection time corresponding to the pixel is relatively long. If the grayscale response time of a large number of pixels in the target partition is greater than or equal to the preset threshold, this may cause color mixing on the display screen. Therefore, it is desirable to have as few pixels in the target partition with grayscale response time greater than or equal to the preset threshold as possible. The preset threshold can be determined by measuring the grayscale response time of different grayscale changes and can be freely set according to the desired display effect. This is not specifically limited in this embodiment.

[0062] The number of pixels with a grayscale response time greater than or equal to a preset threshold in each brightness adjustment strategy is counted. Since the number of pixels with a grayscale response time greater than or equal to the preset threshold in the target partition is required to be as small as possible, the brightness adjustment strategy with the least number of pixels is determined as the target adjustment strategy for the target partition of the display panel.

[0063] Among them, since the display parameters of the next frame to be displayed in the target partition of the display panel are one of the brightness adjustment strategies, when other adjustment schemes are screened out, the display parameters of the next frame to be displayed in the target partition can be maintained for display, that is, the display parameters of the next frame to be displayed in the target partition are determined as the target adjustment strategy of the target partition.

[0064] This embodiment takes the target partition with uniform backlight brightness as the object of brightness adjustment, and adjusts the backlight brightness of the target partition and the grayscale value of the pixels in the target partition at the same time, instead of adjusting the grayscale value of the pixels alone. Then, based on the grayscale response time, the brightness adjustment strategy of the target partition determined by the solution with better liquid crystal response speed is selected as the target adjustment strategy for the target partition, thereby ensuring the brightness of the image while improving the color mixing phenomenon caused by the slow response time.

[0065] The present invention provides a method for adjusting the brightness of a display panel, the method comprising the following steps:

[0066] 1. Given the number of backlight partitions m×n, there is a backlight partition A in the current frame, and the next frame of the same backlight partition is B, as shown in Figure 2. Figure 3 shows the 100×100 pixels included in the backlight partition in Figure 2;

[0067] 2. Calculate the grayscale value of each pixel in the next frame B under the backlight brightness (LB), such as 1000 nits. The corresponding pixel brightness value LP = GrayB × LB;

[0068] 3. When the backlight brightness is changed, in order to keep LP unchanged, the backlight brightness value LB_new under different backlight levels can be calculated, and the corresponding new theoretical grayscale value GrayB_new can be calculated using the linear relationship to obtain GrayB_new=LP / LB_new. For example: Calculate the corresponding theoretical compensation value (i.e., liquid crystal transmittance) for each backlight partition of the next frame at each backlight level of 8-bit backlight. There are 256 results in total. Among them, if any of the theoretical compensation values ​​is outside the grayscale range of 0-255, the theoretical compensation value corresponding to the backlight level is discarded, and the compensated grayscale value is screened out. All cases such as B1...B256 can be obtained by grayscale compensation of the backlight and liquid crystal layer while keeping the original image content unchanged;

[0069] 4. The current grayscale value corresponding to each pixel in the current frame is A, and the target grayscale value corresponding to each pixel in the next frame is B1...B256 (a total of 256 cases). A table lookup is used to determine the number of pixels whose G2G response time exceeds 4ms in each case when the grayscale value changes from A to B1...B256. For example, if the grayscale value changes from A(1,1) to B(1,1), and the table lookup shows that the G2G response time exceeds 4ms, the count is increased by 1, and there are a total of n points (Figure 3);

[0070] 5. Select the backlight with the smallest n and the corresponding grayscale value as the optimal choice for the next frame B of the partition;

[0071] 6. Since there are m×n partitions, operations 2-5 need to be performed m×n times to obtain the backlight and grayscale values ​​of the entire image after improving the GTG response.

[0072] This embodiment modifies the original screen's LCD transmittance to avoid pixels with long GTG response times, then uses backlight compensation to maintain image content. This algorithm targets specific areas with poor GTG and uses backlight compensation to increase or decrease backlight brightness in areas with slow LCD response speeds. This ensures image quality while also improving color mixing caused by slow response times.

[0073] Those skilled in the art will appreciate that all or part of the steps in the above method can be completed by instructing relevant hardware (e.g., a processor) through a program, and the program can be stored in a computer-readable storage medium, such as a read-only memory, a disk, or an optical disk. Optionally, all or part of the steps in the above embodiment can also be implemented using one or more integrated circuits. Accordingly, each module / unit in the above embodiment can be implemented in the form of hardware, such as implementing its corresponding function through an integrated circuit, or in the form of a software functional module, such as implementing its corresponding function through a processor executing a program / instruction stored in a memory. This application is not limited to any particular form of combination of hardware and software.

[0074] In order to better implement the display panel brightness adjustment method in the embodiment of the present application, based on the display panel brightness adjustment method, the embodiment of the present application further provides a display panel brightness adjustment device. As shown in FIG4 , the display panel brightness adjustment device 100 includes:

[0075] An information acquisition module 110 is configured to acquire display parameters of a next frame of an image to be displayed in a target partition of the display panel, wherein the target partition includes a plurality of pixels, and the display parameters include backlight brightness and a grayscale value of each pixel, wherein each pixel in the target partition corresponds to the backlight brightness;

[0076] a strategy analysis module 120, communicatively connected to the information acquisition module 110, configured to determine at least one brightness adjustment strategy for the target partition based on the backlight brightness and the grayscale value of each pixel;

[0077] a parameter acquisition module 130, which is in communication with the strategy analysis module 120 and is configured to respectively acquire the grayscale response time of each pixel adjusted based on the brightness adjustment strategy;

[0078] The strategy screening module 140 is in communication with the strategy analysis module 120 and the parameter acquisition module 130 , and is configured to screen the brightness adjustment strategy according to the grayscale response time to determine a target adjustment strategy for the target partition of the display panel.

[0079] In some embodiments, the strategy analysis module 120 is also used to determine the pixel brightness value of each pixel based on the backlight brightness and the pixel grayscale value of each pixel; keep the pixel brightness value of each pixel unchanged, and determine at least one target adjustment strategy of the target pixel based on the target pixel brightness value of any target pixel in each pixel; and screen the target adjustment strategy of each pixel to determine at least one brightness adjustment strategy of the target partition.

[0080] In some embodiments, the strategy analysis module 120 is also used to obtain the backlight brightness value of each backlight level of the display panel; keep the target pixel brightness value of the target pixel unchanged, and determine the theoretical grayscale value of the target pixel at each backlight brightness value based on the target pixel brightness value; determine at least one target adjustment strategy for the target pixel based on the backlight brightness value and the theoretical grayscale value.

[0081] In some embodiments, the strategy analysis module 120 is further configured to filter the theoretical grayscale value according to the backlight level to obtain a compensated grayscale value; and determine at least one target adjustment strategy for the target pixel according to the backlight brightness value and the compensated grayscale value.

[0082] In some embodiments, the strategy analysis module 120 is also used to determine that the backlight brightness value existing in the target adjustment strategy of each pixel is the target backlight brightness value; determine the target grayscale value of each pixel corresponding to the target backlight brightness value according to the target adjustment strategy of each pixel; and determine the brightness adjustment strategy of the target partition according to the target backlight brightness value and the target grayscale value.

[0083] In some embodiments, the brightness adjustment strategy includes the next backlight brightness value of the target partition and the next grayscale value of each of the pixels. The parameter acquisition module 130 is also used to obtain the current grayscale value of each of the pixels in the current frame image displayed by the target partition of the display panel; based on the brightness adjustment strategy, the response time of each of the pixels adjusted from the current grayscale value to the next grayscale value is obtained, and the response time is determined as the grayscale response time of the next backlight brightness value.

[0084] In some embodiments, the strategy screening module 140 is further used to count the number of pixels in each brightness adjustment strategy whose grayscale response time is greater than or equal to a preset threshold; and determine the brightness adjustment strategy with the least number of pixels as the target adjustment strategy for the target partition of the display panel.

[0085] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0086] In some embodiments of the present application, an electronic device is provided, comprising one or more processors; a memory; and one or more applications, wherein the one or more applications are stored in the memory and configured to cause the processor to execute the steps of the display panel brightness adjustment method described above. The steps of the display panel brightness adjustment method herein may be the steps of the display panel brightness adjustment method described in each of the above embodiments.

[0087] In some embodiments of the present application, a storage medium is provided, in which a plurality of instructions are stored. The instructions are used for execution by a controller to implement any of the methods described above.

[0088] Each technical feature of the above embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of each technical feature in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0089] The above is a detailed introduction to a display panel brightness adjustment method, device, electronic device and storage medium provided in the embodiments of the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea; at the same time, for technical personnel in this field, based on the ideas of the present application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A method for adjusting the brightness of a display panel, wherein: include: Acquire display parameters of a next frame of an image to be displayed in a target partition of a display panel, wherein the target partition includes a plurality of pixels, and the display parameters include backlight brightness and a pixel grayscale value of each of the pixels, and each of the pixels in the target partition corresponds to the backlight brightness; Determining at least one brightness adjustment strategy for the target partition according to the backlight brightness and the pixel grayscale value of each of the pixels; Respectively obtaining a grayscale response time of each pixel adjusted based on the brightness adjustment strategy; The brightness adjustment strategy is screened according to the grayscale response time to determine a target adjustment strategy for the target partition of the display panel.

2. The display panel brightness adjustment method according to claim 1, wherein: The step of determining at least one brightness adjustment strategy for the target partition according to the backlight brightness and the pixel grayscale value of each pixel includes: Determine a pixel brightness value of each of the pixels according to the backlight brightness and the pixel grayscale value of each of the pixels; Keeping the pixel brightness value of each of the pixels unchanged, determining at least one target adjustment strategy of the target pixel according to the target pixel brightness value of any target pixel in each of the pixels; The target adjustment strategy of each pixel is screened to determine at least one brightness adjustment strategy of the target partition.

3. The display panel brightness adjustment method according to claim 2, wherein: The step of keeping the pixel brightness value of each pixel unchanged and determining at least one target adjustment strategy of the target pixel according to the target pixel brightness value of any target pixel in each pixel further includes: Obtaining a backlight brightness value of each backlight level of the display panel; Keeping the target pixel brightness value of the target pixel unchanged, determining a theoretical grayscale value of the target pixel at each backlight brightness value according to the target pixel brightness value; At least one target adjustment strategy of the target pixel is determined according to the backlight brightness value and the theoretical grayscale value.

4. The display panel brightness adjustment method according to claim 3, wherein: The determining of at least one target adjustment strategy for the target pixel according to the backlight brightness value and the theoretical grayscale value includes: Screening the theoretical grayscale value according to the backlight level to obtain a compensated grayscale value; At least one target adjustment strategy of the target pixel is determined according to the backlight brightness value and the compensated grayscale value.

5. The display panel brightness adjustment method according to claim 3 or 4, wherein: The step of screening the target adjustment strategy for each pixel to determine at least one brightness adjustment strategy for the target partition includes: Determine the backlight brightness value existing in the target adjustment strategy of each pixel as the target backlight brightness value; Determining a target grayscale value of each pixel corresponding to the target backlight brightness value according to a target adjustment strategy for each pixel; A brightness adjustment strategy for the target partition is determined according to the target backlight brightness value and the target grayscale value.

6. The display panel brightness adjustment method according to claim 5, wherein: The brightness adjustment strategy includes the next backlight brightness value of the target partition and the next grayscale value of each pixel, and the grayscale response time of each pixel adjusted based on the brightness adjustment strategy is obtained respectively, including: Acquire a current grayscale value of each pixel in a current frame displayed by the target subarea of ​​the display panel; Based on the brightness adjustment strategy, a response time of each pixel being adjusted from the current grayscale value to the next grayscale value is obtained, and the response time is determined as the grayscale response time of the next backlight brightness value.

7. The display panel brightness adjustment method according to claim 6, wherein: The screening of the brightness adjustment strategy according to the grayscale response time to determine the target adjustment strategy of the target partition of the display panel includes: Counting the number of pixels whose grayscale response time in each brightness adjustment strategy is greater than or equal to a preset threshold; The brightness adjustment strategy with the least number of pixels is determined as the target adjustment strategy of the target partition of the display panel.

8. The display panel brightness adjustment method according to claim 3, wherein: The backlight level is the number of steps of color transition of the display panel, which is determined according to the color depth of the display panel. The backlight level is used to evenly or non-evenly divide the brightness variation range of the display panel.

9. The display panel brightness adjustment method according to claim 2, wherein: The pixel brightness value is the product of the corresponding pixel grayscale value and the corresponding backlight brightness.

10. The display panel brightness adjustment method according to any one of claims 1 to 4 and 6 to 9, wherein: The grayscale response time is the time taken for each pixel in the target partition to be adjusted from the current frame to the state of each brightness adjustment strategy, and each pixel under each brightness adjustment strategy corresponds to one grayscale response time.

11. The display panel brightness adjustment method according to any one of claims 1 to 4 and 6 to 9, wherein: The target adjustment strategy is the brightness adjustment strategy with the shortest grayscale response time.

12. The method for adjusting the brightness of a display panel according to any one of claims 1 to 4 and 6 to 9, wherein: The display panel includes a plurality of backlight partitions, the brightness of each of the backlight partitions is uniformly adjusted, and the target partition includes one of the backlight partitions, or includes a plurality of adjacent backlight partitions.

13. A display panel brightness adjustment device, wherein: include: An information acquisition module, used to acquire display parameters of a next frame of a picture to be displayed in a target partition of the display panel, wherein the target partition includes a plurality of pixels, and the display parameters include backlight brightness and a pixel grayscale value of each pixel, and each pixel in the target partition corresponds to the backlight brightness; a strategy analysis module, which is in communication with the information acquisition module and is used to determine at least one brightness adjustment strategy of the target partition according to the backlight brightness and the pixel grayscale value of each pixel; A parameter acquisition module, which is in communication with the strategy analysis module and is used to respectively acquire the grayscale response time of each pixel adjusted based on the brightness adjustment strategy; A strategy screening module is communicatively connected with the strategy analysis module and the parameter acquisition module, and is used to screen the brightness adjustment strategy according to the grayscale response time to determine the target adjustment strategy of the target partition of the display panel.

14. An electronic device, wherein: The electronic device includes a processor, a memory, and a computer program stored in the memory and executable on the processor, and the processor executes the computer program to implement the steps in the display panel brightness adjustment method described in any one of claims 1 to 12.

15. A storage medium storing a plurality of instructions, wherein: The instructions are used for being executed by a controller to implement the method according to any one of claims 1 to 12.

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