A display device, a backlight adjustment method, and a storage medium

Abstract

The application provides a display device, a backlight adjusting method and a storage medium, and relates to the technical field of display. The display device can divide a target image to be displayed into a plurality of image regions according to the number of backlight partitions, determine the backlight brightness value of each image region based on the brightness distribution state of each image region, and adjust the backlight brightness of each backlight partition according to the backlight brightness value of each image region, so that the halo can be effectively reduced, and the display effect of the picture can be improved.

Description

Technical Field

[0001] This application relates to the field of display technology, and in particular to a display device, a backlight adjustment method, and a storage medium. Background Technology

[0002] With the rapid advancement of liquid crystal display (LCD) manufacturing technology, and its advantages such as thinness, power saving, and no radiation, LCDs are widely used in various electronic products such as laptops, digital cameras, digital camcorders, mobile phones, computer screens, and LCD TVs.

[0003] Currently, LCDs mainly use dynamic backlight area adjustment technology to adjust the backlight brightness of each zone in the backlight module. However, during the display process, halo phenomenon will occur for images with concentrated content and high brightness in the zone area, affecting the display effect. Summary of the Invention

[0004] To address the problems in the prior art, embodiments of this application provide a display device, a backlight adjustment method, and a storage medium, which can effectively reduce halos and improve the display effect of the image.

[0005] In a first aspect, embodiments of this application provide a display device, including a processor, a display panel, and a backlight module located on the back of the display panel;

[0006] The display panel is used to display images;

[0007] The backlight module is used to provide backlight for the display panel, and the backlight module includes multiple backlight zones;

[0008] The processor is configured as follows:

[0009] The target image to be displayed is divided into multiple image regions according to the number of backlight partitions contained in the backlight module; each image region corresponds to one backlight partition.

[0010] Based on the brightness distribution of each image region, the backlight brightness value of each image region is determined; wherein, the brightness distribution of the first image region is determined based on the brightness of each pixel contained in the first image region; the brightness distribution of the first image region is either uniform or non-uniform; the first image region is any one of the plurality of image regions;

[0011] Adjust the backlight brightness of the corresponding backlight zone for each image area according to the backlight brightness value of each image area.

[0012] In one possible implementation, the processor is specifically configured to determine the brightness distribution state of the first image region in the following manner:

[0013] Determine the first pixel with the highest brightness and the second pixel with the lowest brightness in the first image region;

[0014] If the difference between the brightness of the first pixel and the brightness of the second pixel is greater than a set first threshold, then the brightness distribution of the first image region is non-uniform.

[0015] If the difference between the brightness of the first pixel and the brightness of the second pixel is less than or equal to the first threshold, then the brightness distribution of the first image region is uniform.

[0016] In one possible implementation, the processor is specifically configured as follows:

[0017] If the brightness distribution of the first image region is uniform, then the average brightness of the first image region is determined based on the brightness of each pixel contained in the first image region.

[0018] The average brightness of the first image region is used as the backlight brightness value of the first image region.

[0019] In one possible implementation, the processor is specifically configured as follows:

[0020] If the brightness distribution of the first image region is non-uniform, then the distribution of bright pixels in the first image region is determined based on the brightness of each pixel in the first image region. The distribution of bright pixels refers to the distribution of bright pixels in the first image region. Bright pixels refer to pixels with brightness greater than a set brightness threshold. The distribution of bright pixels in the first image region can be either central or non-central.

[0021] Based on the distribution of bright pixels in the first image region, the backlight brightness value of the first image region is determined.

[0022] In one possible implementation, the processor is specifically configured to determine the distribution of highlight pixels in the first image region in the following manner:

[0023] Determine the first number of bright pixels contained in the first image region and the second number of bright pixels contained in the central area of ​​the first image region;

[0024] If the ratio of the second quantity to the first quantity is greater than or equal to the set second threshold, then the distribution of the bright pixels in the first image region is determined to be a central distribution.

[0025] If the ratio of the second quantity to the first quantity is less than the second threshold, then the distribution of the bright pixels in the first image region is determined to be non-central.

[0026] In one possible implementation, the processor is specifically configured as follows:

[0027] If the distribution of bright pixels in the first image region is centrally distributed, then the average brightness of the first image region is determined based on the brightness of each pixel contained in the first image region.

[0028] The backlight brightness value of the first image region is determined based on the average brightness of the first image region, the ratio of the second quantity to the first quantity, and the second threshold.

[0029] In one possible implementation, the processor is specifically configured as follows:

[0030] If the distribution of the highlighted pixels in the first image region is non-central, then the first image region is divided into multiple sub-regions.

[0031] The influencing factors corresponding to each sub-region were determined separately;

[0032] The backlight brightness value of the first image region is determined based on the influence factors corresponding to each sub-region.

[0033] In one possible implementation, the processor is specifically configured to determine the influence factor corresponding to the first sub-region, wherein the first sub-region is any one of the sub-regions, in the following manner:

[0034] Determine the first number of highlighted pixels contained in the first image region and the third number of highlighted pixels contained in the first sub-region;

[0035] If the ratio of the third quantity to the first quantity is less than or equal to a set third threshold, then the influence factor corresponding to the first sub-region is determined to be a set value.

[0036] If the ratio of the third quantity to the first quantity is greater than the third threshold, then the influence factor corresponding to the first sub-region is determined based on the average brightness of at least one adjacent image region adjacent to the first sub-region and the distance between the at least one adjacent image region and the first sub-region.

[0037] Secondly, embodiments of this application provide a backlight adjustment method, the method comprising:

[0038] The target image to be displayed is divided into multiple image regions according to the number of backlight zones; each image region corresponds to one backlight zone.

[0039] Based on the brightness distribution of each image region, the backlight brightness value of each image region is determined; wherein, the brightness distribution of the first image region is determined based on the brightness of each pixel contained in the first image region; the brightness distribution of the first image region is either uniform or non-uniform; the first image region is any one of the plurality of image regions;

[0040] Adjust the backlight brightness of the corresponding backlight zone for each image area according to the backlight brightness value of each image area.

[0041] Thirdly, embodiments of this application provide a backlight adjustment device, including:

[0042] The target image to be displayed is divided into multiple image regions according to the number of backlight partitions; each image region corresponds to one backlight partition.

[0043] The first determining unit determines the backlight brightness value of each image region based on the brightness distribution state of each image region; wherein, the brightness distribution state of the first image region is determined based on the brightness of each pixel contained in the first image region; the brightness distribution state of the first image region is uniform or non-uniform; the first image region is any one of the plurality of image regions;

[0044] The adjustment unit adjusts the backlight brightness of the corresponding backlight zone for each image area according to the backlight brightness value of each image area.

[0045] Fourthly, embodiments of this application provide a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the method described in the second aspect.

[0046] The display device, backlight adjustment method, and storage medium provided in this application embodiment can divide the target image to be displayed into multiple image regions according to the number of backlight zones. Based on the brightness distribution state of each image region, the backlight brightness value of each image region is determined. According to the backlight brightness value of each image region, the backlight brightness of each backlight zone is adjusted, which can effectively reduce halos and improve the display effect of the screen. Attached Figure Description

[0047] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0048] Figure 1 A schematic diagram of a halo phenomenon provided in an embodiment of this application;

[0049] Figure 2 This is a schematic diagram of an operational scenario provided in an embodiment of this application;

[0050] Figure 3 A control device configuration block diagram provided in an embodiment of this application;

[0051] Figure 4 A hardware configuration block diagram of a display device provided in the embodiments of this application;

[0052] Figure 5 This is a schematic diagram of the software configuration of a display device provided in an embodiment of this application;

[0053] Figure 6 This is a schematic diagram of the structure of a display provided in an embodiment of this application;

[0054] Figure 7 This is a schematic diagram of the structure of a backlight module provided in an embodiment of this application;

[0055] Figure 8 A schematic flowchart illustrating a backlight adjustment method provided in an embodiment of this application;

[0056] Figure 9 This is a schematic diagram illustrating the segmentation of a target image as provided in an embodiment of this application;

[0057] Figure 10 A schematic flowchart illustrating the process of determining the brightness distribution state provided in an embodiment of this application;

[0058] Figure 11 This application provides a schematic diagram of a process for determining a backlight brightness value in an embodiment of the present application.

[0059] Figure 12 This is a schematic diagram illustrating another process for determining backlight brightness values ​​provided in an embodiment of this application.

[0060] Figure 13 A flowchart illustrating the process of determining the distribution of highlight pixels is provided in an embodiment of this application.

[0061] Figure 14 A schematic diagram illustrating the division of a central region provided in an embodiment of this application;

[0062] Figure 15 This application provides a schematic diagram of a process for determining a backlight brightness value in an embodiment of the present application.

[0063] Figure 16 This is a schematic diagram illustrating another process for determining backlight brightness values ​​provided in an embodiment of this application.

[0064] Figure 17 This is a schematic diagram illustrating the division of sub-regions as provided in an embodiment of this application;

[0065] Figure 18 This is a schematic diagram illustrating another method of dividing sub-regions according to an embodiment of this application;

[0066] Figure 19 A flowchart illustrating the process of determining an impact factor, provided as an embodiment of this application;

[0067] Figure 20 A flowchart illustrating the process of determining an impact factor, provided as an embodiment of this application;

[0068] Figure 21 A schematic flowchart illustrating a backlight adjustment method provided in an embodiment of this application;

[0069] Figure 22 A structural block diagram of a backlight adjustment device provided in an embodiment of this application;

[0070] Figure 23 This is a structural block diagram of a backlight adjustment device provided in an embodiment of this application. Detailed Implementation

[0071] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. However, the exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided to make the present invention more comprehensive and complete, and to fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the figures denote the same or similar structures, and therefore repeated descriptions of them will be omitted. Terms describing position and direction in the present invention are illustrative based on the accompanying drawings, but changes can be made as needed, and all such changes are included within the scope of protection of the present invention. The accompanying drawings of the present invention are for illustrative purposes only and do not represent actual proportions.

[0072] For ease of understanding, the terms used in the embodiments of this invention are explained below:

[0073] 1) Local Dimming Technology: Backlighting is a form of illumination commonly used in LCD displays. The difference lies in that backlighting is emitted from the side or back, often used to increase illumination in low-light environments and the brightness of monitors and LCD screens. Local Dimming technology refers to the terminal display system dividing the backlit display interface into several areas, analyzing and calculating the brightness of the image displayed in each area, and then automatically controlling the brightness of the backlight in each area. Local Dimming technology utilizes a large number of LEDs (Light Emitting Diodes) to form the backlight. The backlight LEDs can adjust according to the brightness of the image, maximizing the brightness of the bright parts of the displayed image while reducing or even turning off the dark parts to achieve optimal contrast.

[0074] 2) LCD: A flat, ultra-thin display device composed of a certain number of color or black and white pixels, placed in front of a light source or reflector; LCDs have very low power consumption and are suitable for various electronic devices; its main principle is to use electric current to stimulate liquid crystal molecules to produce dots, lines, and surfaces to work with a backlight to form an image.

[0075] 3) SOC chip (System-on-a-Chip): refers to a system-level chip, which is an integrated circuit with a specific purpose. It contains a complete system and all the embedded software content to realize the entire process from determining the system functions to software / hardware partitioning and completing the design.

[0076] With the rapid advancement of LCD manufacturing technology and its advantages such as thinness, power saving, and no radiation, LCD monitors are widely used in various electronic products, including laptops, digital cameras, digital camcorders, mobile phones, computer screens, and LCD TVs. Currently, LCDs mainly use dynamic backlight area adjustment technology to adjust the backlight brightness of each zone within the backlight module. However, during display, for areas with concentrated and high-brightness content, a halo effect can occur, affecting the display quality. For example, the "mouse halo" phenomenon can be used to illustrate this. Figure 1 As shown, when the mouse cursor 101 is on a black image, a halo appears around the mouse cursor 101, reducing the display effect of the image and making it impossible for the human eye to discern what the pattern is.

[0077] In view of this, embodiments of the present invention provide a display device that can divide a target image to be displayed into multiple image regions according to the number of backlight zones, and adjust the backlight brightness value of each image region based on the brightness distribution state of each image region, which can effectively reduce halos and improve the display effect of the image.

[0078] Figure 2 This is a schematic diagram of an operation scenario according to an embodiment of this application, such as... Figure 2 As shown, a user can operate the display device 200 via a mobile terminal 300 and a control device 100. The control device 100 can be a remote control, and communication between the remote control and the display device includes infrared protocol communication, Bluetooth protocol communication, wireless or other wired methods to control the display device 200. The user can input user commands through buttons on the remote control, voice input, control panel input, etc., to control the display device 200. In some embodiments, a mobile terminal, tablet computer, computer, laptop computer, and other smart devices can also be used to control the display device 200.

[0079] In some embodiments, the mobile terminal 300 can install software applications with the display device 200 to achieve connection and communication via network communication protocols, enabling one-to-one control operations and data communication. Audio and video content displayed on the mobile terminal 300 can also be transmitted to the display device 200 for synchronous display. The display device 200 also communicates with the server 400 via various communication methods. The display device 200 can communicate via a local area network (LAN), wireless local area network (WLAN), and other networks. The server 400 can provide various content and interactive features to the display device 200. The display device 200 can be a liquid crystal display, an OLED display, or a projection display device. In addition to providing broadcast television reception functions, the display device 200 can also be equipped with a smart network television function that provides computer support.

[0080] Figure 3 This is a configuration block diagram of a control device 100 provided in an embodiment of this application. For example... Figure 3 As shown, the control device 100 includes a controller 110, a communication interface 130, a user input / output interface 140, a memory, and a power supply. The control device 100 can receive user input commands and convert them into commands that the display device 200 can recognize and respond to, acting as an intermediary for interaction between the user and the display device 200. The communication interface 130 is used for external communication and includes at least one of a Wi-Fi chip, a Bluetooth module, NFC, or a replacement module. The user input / output interface 140 includes at least one of a microphone, a touchpad, a sensor, buttons, or a replacement module.

[0081] Figure 4 This is a hardware configuration block diagram of a display device 200 provided for an embodiment of this application. For example... Figure 4The display device 200 shown includes at least one of the following: a tuner / demodulator 210, a communicator 220, a detector 230, an external device interface 240, a processor 250, a display 260, an audio output interface 270, a memory, a power supply, and a user interface 280. The processor includes a central processing unit, a video processor, an audio processor, a graphics processor, RAM, ROM, and a first to nth interface for input / output. The display 260 can be at least one of a liquid crystal display, an OLED display, a touch display, and a projection display, and can also be a projection device and a projection screen. The tuner / demodulator 210 receives broadcast television signals via wired or wireless reception and demodulates audio and video signals, such as EPG data signals, from multiple wireless or wired broadcast television signals. The detector 230 is used to collect signals from the external environment or signals interacting with the external environment. The processor 250 and the tuner / demodulator 210 can be located in different separate devices; that is, the tuner / demodulator 210 can also be located in an external device of the main device where the processor 250 is located, such as an external set-top box.

[0082] In some embodiments, the processor 250 controls the operation of the display device and responds to user operations through various software control programs stored in memory. The processor 250 controls the overall operation of the display device 200. The user can input user commands through a graphical user interface (GUI) displayed on the monitor 260, and the user input interface receives the user input commands through the GUI. Alternatively, the user can input user commands by inputting specific sounds or gestures, and the user input interface receives the user input commands by recognizing the sounds or gestures through sensors.

[0083] In some embodiments, a "user interface" is the medium through which an application or operating system interacts and exchanges information with a user, enabling the conversion between the internal form of information and a form acceptable to the user. A common form of user interface is the graphical user interface (GUI), which refers to a user interface related to computer operation displayed graphically. It can be an icon, window, control, or other interface element displayed on the screen of an electronic device. Controls can include at least one of the visual interface elements such as icons, buttons, menus, tabs, text boxes, dialog boxes, status bars, navigation bars, and widgets.

[0084] Figure 5 This is a schematic diagram of the software configuration of a display device 200 provided in an embodiment of this application, as shown below. Figure 5As shown, the system is divided into four layers, from top to bottom: the Applications layer (referred to as the "Application Layer"), the Application Framework layer (referred to as the "Framework Layer"), the Android runtime and system library layer (referred to as the "System Runtime Layer"), and the kernel layer. The kernel layer contains at least one of the following drivers: audio driver, display driver, Bluetooth driver, camera driver, Wi-Fi driver, USB driver, HDMI driver, sensor driver (such as fingerprint sensor, temperature sensor, pressure sensor, etc.), and power driver, etc.

[0085] Figure 6 This is a schematic diagram of the structure of the display 260 provided in the embodiments of this application, as shown below. Figure 6 As shown, the display 260 includes a display panel 261 and a backlight module 262. The display panel 261 can be used to display images; the backlight module 262 can include multiple backlight zones, and the backlight module 262 can adjust the backlight brightness value of each backlight zone through a backlight driving unit, thereby changing the brightness of the display panel 261.

[0086] In the embodiments of this application, the display device can be a product with display function, such as a mobile phone, tablet computer, television, laptop computer, etc.; or it can be a component with display function, such as a liquid crystal display, etc.

[0087] Figure 7 This is a schematic diagram of a backlight module 262 provided in an embodiment of this application. The backlight module 262 may have multiple backlight zones 701, and each backlight zone 701 may have one or more backlight units 702. One or more backlight units in the same backlight zone 701 can be adjusted using the same backlight brightness value, while different backlight zones 701 can be adjusted using independent backlight brightness values.

[0088] For example, in Figure 7 The enlarged view below shows four backlight zones 701-a to 701-d, each containing four backlight units. By setting the backlight brightness values ​​of these four backlight zones 701-a to 701-d, the pixels corresponding to these zones can display the corresponding grayscale, thus achieving higher contrast. For example, when one or more pixels corresponding to backlight zone 701-a need to display a pure black image, the backlight brightness value of backlight zone 701-a can be set to 0; when one or more pixels corresponding to backlight zone 701-b need to display a pure white image, the backlight value of backlight zone 701-b can be set to 255.

[0089] In the embodiments of this application, the backlight zones can be divided in any appropriate manner, and the shape of the backlight zones is not limited to a regular geometric shape. For example, since users' attention is usually focused on the central area of ​​the screen, the central area of ​​the backlight module can be divided into a large number of smaller backlight zones. For example, each backlight zone may include one backlight unit. As for the area around the screen, users pay less attention to it, so the edge area of ​​the backlight module can be divided into a small number of larger backlight zones. For example, each backlight zone may include 20 backlight units.

[0090] In the embodiments of this application, the shape of the backlight partition can be square, or it can be strip, zigzag, or other regular or irregular shapes. This application does not limit this.

[0091] To further illustrate the technical solutions provided in the embodiments of this application, a detailed description is provided below in conjunction with the accompanying drawings and specific implementation methods. Although the embodiments of this application provide method operation steps as shown in the following embodiments or drawings, the method may include more or fewer operation steps based on conventional or non-inventive methods. In steps where there is no logically necessary causal relationship, the execution order of these steps is not limited to the execution order provided in the embodiments of this application. In actual processing or when the device executes the method, it may be executed in the order shown in the embodiments or drawings, or in combination.

[0092] For ease of understanding, the following detailed description of a backlight adjustment method provided in this application is provided through specific embodiments. Figure 8 A flowchart of a backlight adjustment method is shown. Figure 8 As shown, the method may include the following steps:

[0093] Step S801: Divide the target image to be displayed into multiple image regions according to the number of backlight partitions.

[0094] In one optional implementation, the number of backlight partitions can be represented by M*N, and the number of backlight partitions can be determined according to the model of the currently used display device. For example, assuming the processor determines the number of backlight partitions to be 3*3 based on the model of the currently used display device, after receiving the target image to be displayed, the target image can be divided into 3*3 image regions according to the number of backlight partitions, with each image region corresponding to one backlight partition, such as... Figure 9 As shown, image regions 901 to 909 each correspond to a backlight zone.

[0095] Step S802: Determine the backlight brightness value of each image region according to the brightness distribution state of each image region.

[0096] The brightness distribution of each image region can be determined based on the brightness of each pixel contained in that image region. The brightness distribution of an image region may be uniform or non-uniform.

[0097] For any image region, if the brightness distribution of the image region is uniform, then the average brightness of the image region is determined based on the brightness of each pixel contained in the image region; and the average brightness of the image region is used as the backlight brightness value of the image region.

[0098] If the brightness distribution of an image region is non-uniform, then the distribution of bright pixels in the image region is determined based on the brightness of each pixel contained in the image region; and the backlight brightness value of the image region is determined based on the distribution of bright pixels in the image region. Here, the distribution of bright pixels in an image region refers to the distribution of bright pixels contained in the image region; bright pixels are pixels whose brightness is greater than a set brightness threshold.

[0099] Step S803: Adjust the backlight brightness of the corresponding backlight partition of each image area according to the backlight brightness value of each image area.

[0100] Once the backlight brightness value for each image region is determined, the backlight brightness of the corresponding backlight zones for each image region can be adjusted based on the determined backlight brightness value.

[0101] Using the above method, when the brightness distribution of a certain image area is non-uniform, the display device can determine the backlight brightness value of that image area based on the distribution of bright pixels. The backlight brightness of the current image area is then adjusted according to this value, thereby reducing halos and improving the display effect.

[0102] In some embodiments, when determining the brightness distribution state of each image region in step S802, each image region can be sequentially used as the current image region, through... Figure 10 The method shown determines the brightness distribution state of the current image region, such as Figure 10 As shown, the method includes:

[0103] Step S1001: Determine the first pixel with the highest brightness and the second pixel with the lowest brightness contained in the current image area.

[0104] Specifically, the pixel values ​​of each pixel in the current area can be obtained first, and then the brightness of each pixel can be determined based on the pixel values, thereby determining the first pixel with the highest brightness and the second pixel with the lowest brightness.

[0105] For example, in one embodiment, assuming that image region 905 is the current image region, after obtaining the pixel value of each pixel contained in image region 905, the gray value of each pixel contained in image region 905 can be determined according to the pixel value of each pixel, and the gray value of each pixel is used as the brightness of each pixel.

[0106] In the embodiments of this application, when determining the grayscale value of each pixel based on the pixel value of each pixel, a proportional method can be used. For example, assuming that the pixel value of a certain pixel is R=100, G=120, B=100, the grayscale value of the pixel can be determined according to the ratio R:G:B=0.3:0.3:0.1, which is R*0.3+G*0.3+B+0.1, that is, the grayscale value of the pixel is 76. Alternatively, a maximum value method can be used. For example, assuming that the pixel value of a certain pixel is R=100, G=120, B=100, the grayscale value of the pixel can be determined according to the maximum value method, which is 120. This application does not limit this.

[0107] After determining the brightness of each pixel in the current region, the first pixel with the highest brightness and the second pixel with the lowest brightness are identified.

[0108] Step S1002: Determine the brightness variation range of the current image region based on the brightness of the first pixel and the brightness of the second pixel.

[0109] The range of brightness variation in the current image region can be determined based on the difference between the brightness of the first pixel and the brightness of the second pixel. Specifically, the range of brightness variation in the current image region can be calculated using Formula 1.

[0110] D = P max -P min (Formula 1)

[0111] Where D represents the brightness variation range of the current image region, and P max P represents the brightness of the first pixel. min This indicates the brightness of the second pixel.

[0112] Step S1003: Does the brightness variation range of the current image area exceed the set first threshold? If yes, proceed to step S1004; if no, proceed to step S1005.

[0113] Step S1004: The brightness distribution of the current image region is non-uniform.

[0114] Step S1005: The brightness distribution of the current image area is uniform.

[0115] In one embodiment, after determining the first pixel and the second pixel in step S1001, the difference between the brightness of the first pixel and the brightness of the second pixel can be determined based on the brightness of the first pixel and the second pixel, that is, the brightness variation range of the current image area, and the brightness distribution state of the current image area can be determined based on the brightness variation range.

[0116] For example, in one embodiment, assuming that image region 905 is the current image region, and the preset first threshold T1 is 30, according to step S1001, the brightness of the first pixel with the highest brightness in image region 905 is determined to be 120, the brightness of the second pixel with the lowest brightness is determined to be 100, and the difference between the brightness of the first pixel and the brightness of the second pixel is 20, which is less than the first threshold 30. Therefore, it can be determined that the brightness distribution state of image region 905 is uniform.

[0117] In another embodiment, assuming that image region 905 is the current image region, and the first threshold is preset to be 30, according to step S1001, the brightness of the first pixel with the highest brightness in image region 905 is determined to be 120, the brightness of the second pixel with the lowest brightness is determined to be 50, and the difference between the brightness of the first pixel and the brightness of the second pixel is 70, which is greater than the first threshold 30. Therefore, it can be determined that the brightness distribution state of image region 905 is non-uniform distribution.

[0118] pass Figure 10 After determining the brightness distribution state of the current image region using the method shown, a corresponding method can be used to determine the backlight brightness value of the current image region based on the brightness distribution state of the current image region.

[0119] Specifically, in one embodiment, assuming that the brightness distribution of the current image region is determined to be uniform, the following can be used: Figure 11 The method shown determines the backlight brightness value of the current image region, such as... Figure 11 As shown, the method includes:

[0120] Step S1101: Determine the average brightness of the current image region based on the brightness of each pixel contained in the current image region.

[0121] Step S1102: Use the average brightness of the current image area as the backlight brightness value of the current image area.

[0122] Specifically, when the brightness distribution of the current image area is uniform, the backlight brightness value of the current image area can be calculated according to Formula 2.

[0123] B = g (Formula 2)

[0124] Where B represents the backlight brightness value of the current image area, and g represents the average brightness of the current image area.

[0125] In another embodiment, assuming that the brightness distribution of the current image region is determined to be non-uniform, the following can be used: Figure 12 The method shown determines the backlight brightness value of the current image region, such as... Figure 12 As shown, the method includes:

[0126] Step S1201: Determine the distribution of highlight pixels in the current image region based on the brightness of each pixel contained in the current image region.

[0127] Step S1202: Determine the backlight brightness value of the current image region based on the distribution of bright pixels in the current image region.

[0128] Specifically, in step S1201, when determining the distribution of highlight pixels in the current image region, reference can be made to... Figure 13 The method shown is as follows: Figure 13 As shown, the method includes:

[0129] Step S1301: Determine the center region of the current image area;

[0130] Specifically, in one embodiment, assuming image region 905 is the current image region, a central region can be determined at the center of image region 905 according to a preset ratio. For example, assuming the preset ratio is the area of ​​the central region to the area of ​​the current image region = 1:2, such as... Figure 14 As shown by the dashed line in the image, the central region Ω is determined at the center of the image region 905 according to a preset scale.

[0131] Step S1302: Determine the first number of highlighted pixels contained in the current image region;

[0132] Highlighted pixels refer to pixels whose brightness is greater than a set brightness threshold. For example, if the set brightness threshold is 100, then pixels with a brightness greater than 100 are all high-brightness pixels.

[0133] Step S1303: Determine the second number of highlighted pixels contained in the central region of the current image region;

[0134] After determining the center region Ω of the current image region through step S1301, the number C of bright pixels in the current image region (i.e., the first number) and the number C of bright pixels in the center region of the current image region can be determined based on the pixel values ​​of the pixels contained in the current image region. in That is, the second quantity.

[0135] Step S1304: Is the ratio of the second quantity to the first quantity less than the set second threshold? If yes, proceed to step S1305; otherwise, proceed to step S1306.

[0136] Step S1305: The distribution of bright pixels in the current image region is not centered.

[0137] Step S1306: The distribution of bright pixels in the current image area is centered.

[0138] After determining the first quantity and the second quantity through steps S1302 and S1303, the ratio of the first quantity and the second quantity can be calculated according to Formula 3, and the distribution of bright pixels in the current image area can be determined based on this ratio.

[0139]

[0140] Among them, C p C represents the ratio of the first quantity to the second quantity. in C represents the number of highlighted pixels contained in the central region of the current image area, i.e., the second number; C represents the number of highlighted pixels contained in the current image area, i.e., the first number.

[0141] For example, in one embodiment, assuming the set second threshold T2 is 0.3, the first number of bright pixels in the current image area is determined to be 100 through step S1302, and the second number of bright pixels in the central region of the current image area is determined to be 20 through step S1303. Then the ratio of the second number to the first number is 0.2, which is less than the set second threshold, so the distribution of bright pixels in the current image area is determined to be non-central distribution.

[0142] In another embodiment, assuming the set second threshold T2 is 0.3, the first number of bright pixels in the current image area is determined to be 100 through step S1302, and the second number of bright pixels in the central region of the current image area is determined to be 50 through step S1303. Then the ratio of the second number to the first number is 0.5, which is greater than the set second threshold, so the distribution of bright pixels in the current image area is determined to be a central distribution.

[0143] pass Figure 13 After determining the distribution of highlight pixels in the current image region using the method shown, a corresponding method can be used to determine the backlight brightness value of the current image region based on the distribution of highlight pixels in the current image region.

[0144] Specifically, in one embodiment, assuming that the distribution of bright pixels in the current image region is determined to be a central distribution, the following can be used: Figure 15 The method shown determines the backlight brightness value of the current image region, such as... Figure 15 As shown, the method includes:

[0145] Step S1501: Determine the average brightness of the current image region based on the brightness of each pixel contained in the current image region.

[0146] Step S1502: Determine the backlight brightness value of the current image area based on the average brightness of the current image area, the ratio of the second quantity to the first quantity, and the set second threshold.

[0147] Specifically, the backlight brightness value B of the current image area can be calculated and determined according to Formulas 4 and 5.

[0148] B = gain * g (Formula 4)

[0149] gain=1+(C p -T2)(Formula 5)

[0150] Among them, C p T2 represents the ratio of the second quantity to the first quantity, T2 represents the second threshold, and g represents the average brightness.

[0151] In another embodiment, assuming that the distribution of bright pixels in the current image region is determined to be non-central, the following can be used: Figure 16 The method shown determines the backlight brightness value of the current image region, such as... Figure 16 As shown, the method includes:

[0152] Step S1601: Determine multiple sub-regions within the current image region;

[0153] In the embodiments of this application, the current image region can be divided into 4 sub-regions of equal size, or the current image region can be divided into 6 sub-regions of equal size. This application does not limit the division to either of these.

[0154] For example, in one embodiment, it is assumed that image region 905 is the current image region, such as Figure 17 As shown, the image region 905 can be divided into four equal-sized sub-regions, namely sub-region Ω1, sub-region Ω2, sub-region Ω3 and sub-region Ω4.

[0155] In another embodiment, such as Figure 18 As shown, the image region 905 can be divided into 6 equal-sized sub-regions, namely sub-regions Ω1 to Ω6.

[0156] Step S1602: Determine the influencing factors corresponding to each sub-region;

[0157] Specifically, the influence factor corresponding to each sub-region is determined based on the average brightness of at least one adjacent image region and the distance between at least one adjacent image region and each sub-region.

[0158] Step S1603: Determine the backlight brightness value of the current image region based on the influence factors corresponding to each sub-region and the average brightness of the current image region.

[0159] Assuming the current image region contains four sub-regions: Ω1, Ω2, Ω3, and Ω4, step S1602 determines the influence factor as λ1 for sub-region Ω1, λ2 for sub-region Ω2, λ3 for sub-region Ω3, and λ4 for sub-region Ω4. The backlight brightness value B of the current image region can then be determined using Formula 6.

[0160] B=g*λ1*λ2*λ3*λ4 (Formula 6)

[0161] Where g represents the average brightness of the current image region.

[0162] In step S1602, when determining the influence factor corresponding to each sub-region, each sub-region can be sequentially taken as the current sub-region, and referenced... Figure 19 The method shown determines the influence factor of the current sub-region based on the number of highlighted pixels contained in the current sub-region. Specifically, as shown... Figure 19 As shown, the method includes:

[0163] Step S1901: Determine the number of highlighted pixels in the current sub-region and the number of highlighted pixels in the current image region;

[0164] Step S1902: Determine the ratio of the number of highlighted pixels in the current sub-region to the number of highlighted pixels in the current image region;

[0165] Step S1903: Is the ratio greater than the set third threshold? If not, proceed to step S1904; if yes, proceed to step S1905.

[0166] Step S1904: The influence factor corresponding to the current sub-region is set to a predetermined value;

[0167] Step S1905: Determine the influence factor corresponding to the current sub-region based on the average brightness of at least one adjacent image region adjacent to the current sub-region and the distance between at least one adjacent image region and the current sub-region.

[0168] Specifically, in one embodiment, assuming that sub-region Ω1 is the current sub-region, the set third threshold T3 is 0.3, the number of bright pixels C1 contained in sub-region Ω1 is 20, and the number of bright pixels C contained in the current image region is 100, then C1:C = 0.2, which is less than the third threshold. Therefore, the influence factor λ1 corresponding to sub-region Ω1 is a set value, for example, 1.

[0169] In one embodiment, assuming that sub-region Ω2 is the current sub-region, the set third threshold T3 is 0.3, the number of bright pixels C2 contained in sub-region Ω2 is 50, and the number of bright pixels C contained in the current image region is 100, then C2:C = 0.5, which is greater than the third threshold. Therefore, the influence factor λ2 corresponding to sub-region Ω2 can be determined based on the average brightness of at least one adjacent image region adjacent to sub-region Ω2 and the distance between at least one adjacent image region and sub-region Ω2.

[0170] Specifically, when the ratio of the number of highlighted pixels in the current sub-region to the number of highlighted pixels in the current image region is greater than a set third threshold, it can be determined according to... Figure 20 The method shown determines the influence factor of the current sub-region, such as Figure 20 As shown, the method includes:

[0171] Step S2001: Determine at least one adjacent image region that is adjacent to the current sub-region;

[0172] For example, such as Figure 17 As shown, assuming the current sub-region is sub-region Ω2, the adjacent image regions adjacent to sub-region Ω2 include image region 902, image region 903 and image region 906.

[0173] Step S2002: Determine the average brightness of at least one adjacent image region;

[0174] Specifically, after determining at least one adjacent image region through step S2001, the average brightness G of all adjacent image regions can be determined according to formula 6.

[0175]

[0176] Where i represents the number of adjacent image regions, G i This represents the average brightness of the i-th adjacent image region.

[0177] For example, assuming the current sub-region is sub-region Ω2, the adjacent image regions adjacent to sub-region Ω2 include image regions 902, 903 and 906. The average brightness G1 of image region 902 (the first adjacent image region), the average brightness G2 of image region 903 (the second adjacent image region) and the average brightness G3 of image region 906 (the third adjacent image region) can be determined respectively. Then the average value of G1, G2 and G3 is determined, which is the average brightness G of the adjacent image regions adjacent to sub-region Ω2.

[0178] Step S2003: Determine the average distance between the current sub-region and at least one adjacent image region;

[0179] Specifically, after determining at least one adjacent image region through step S2001, the average distance d between the current sub-region and all adjacent image regions can be determined according to formula 7.

[0180]

[0181] Where, d i This represents the distance between the i-th adjacent image region and the current sub-region.

[0182] For example, assuming the current sub-region is sub-region Ω2, the adjacent image regions adjacent to sub-region Ω2 include image region 902, image region 903 and image region 906. The distances d1 (first adjacent image region) between the midpoint of image region 902 and the midpoint of sub-region Ω2, d2 (second adjacent image region) between the midpoint of image region 903 and the midpoint of sub-region Ω2, and d3 (third adjacent image region) between the midpoint of image region 906 and the midpoint of sub-region Ω2 can be determined respectively. Then the average value of d1, d2 and d3, i.e. the average distance d, can be determined.

[0183] Step S2004: Determine the influence factor corresponding to the current sub-region based on the average brightness and average distance of at least one adjacent image region.

[0184] Specifically, after determining the average brightness G and average distance d through steps S2002 and S2003, the influence factor corresponding to the current sub-region can be determined according to formula 8.

[0185]

[0186] For example, assuming the current sub-region is sub-region Ω2, the average brightness G of the adjacent image regions adjacent to sub-region Ω2 is determined to be 127.5 through step S2002, and the average distance d between sub-region Ω2 and at least one adjacent image region is 3. Then the influence factor λ2 corresponding to sub-region Ω2 is 0.45.

[0187] After determining the influencing factors corresponding to each sub-region in the above manner, the backlight brightness value of the current image region can be determined according to Formula 9, and then the backlight brightness value corresponding to each image region can be determined. Based on the determined backlight brightness value, the backlight brightness of the backlight partition corresponding to each image region can be adjusted.

[0188] In the above embodiments, when the brightness distribution of a certain image area is non-uniform, the display device can determine the backlight brightness value of the image area based on the distribution of bright pixels in that image area. If the distribution of bright pixels in the image area is centrally distributed, the backlight brightness value of the image area is determined based on the average brightness of the image area and the ratio of the number of bright pixels in the central area to the total number of bright pixels in the current image area. This can appropriately increase the backlight brightness value of the image area, thereby enhancing the contrast between the central area and the surrounding area, reducing halos, and improving the image display. If the distribution of bright pixels in the image area is not centrally distributed, the image area can be divided into multiple sub-regions, and the influence factor corresponding to each sub-region can be determined. Based on the influence factor, the backlight brightness value of the image area can be appropriately reduced, thereby achieving the beneficial effect of reducing halos and improving the image display.

[0189] For ease of understanding, the backlight adjustment method provided in this application embodiment will be described below through a specific example. Figure 21 A flowchart of the backlight adjustment method provided in this embodiment is shown, such as... Figure 21 As shown, the method includes:

[0190] Step S2101: Divide the target image to be displayed into multiple image regions according to the number of backlight partitions, and use each image region as the current image region in turn.

[0191] Step S2102: Determine the range of brightness variation in the current image region.

[0192] Step S2103: Does the brightness variation range of the current image area exceed the set first threshold? If yes, proceed to step S2105; if no, proceed to step S2104.

[0193] Step S2104: Use the average brightness of the current image area as the backlight brightness value of the current image area.

[0194] Step S2105: Determine the center region of the current image area.

[0195] Step S2106: Determine the first number of highlighted pixels contained in the current image region and the second number of highlighted pixels contained in the center region of the current image region.

[0196] Step S2107: Is the ratio of the second quantity to the first quantity less than the set second threshold? If yes, proceed to step S2108; otherwise, proceed to step S2109.

[0197] Step S2108: Determine multiple sub-regions in the current image region, and use each sub-region as the current sub-region in turn.

[0198] Step S2109: Determine the backlight brightness value of the current image area based on the average brightness of the current image area, the ratio of the second quantity to the first quantity, and the set second threshold.

[0199] Step S2110: Determine the ratio of the number of highlighted pixels in the current sub-region to the number of highlighted pixels in the current image region.

[0200] Step S2111: Is the ratio greater than the set third threshold? If not, proceed to step S2112; if yes, proceed to step S2113.

[0201] Step S2112: The influence factor corresponding to the current sub-region is 1;

[0202] Step S2113: Determine the influence factor corresponding to the current sub-region based on the average brightness and average distance of the adjacent image regions of the current sub-region.

[0203] Step S2114: Determine the backlight brightness value of the current image region based on the influence factors corresponding to each sub-region and the average brightness of the current image region.

[0204] Step S2115: Adjust the backlight brightness of the corresponding backlight partition of each image area according to the backlight brightness value of each image area.

[0205] Based on the same inventive concept, this application also provides a backlight adjustment device, such as... Figure 22 As shown, the backlight adjustment device includes:

[0206] The partitioning unit 2201 divides the target image to be displayed into multiple image regions according to the number of backlight partitions; each image region corresponds to one backlight partition.

[0207] The first determining unit 2202 determines the backlight brightness value of each image region according to the brightness distribution state of each image region; wherein, the brightness distribution state of the first image region is determined according to the brightness of each pixel contained in the first image region; the brightness distribution state of the first image region is uniform or non-uniform; the first image region is any one of the plurality of image regions.

[0208] The adjustment unit 2203 adjusts the backlight brightness of the corresponding backlight zone of each image area according to the backlight brightness value of each image area.

[0209] In one possible implementation, a second determining unit 2301 is further included before the first determining unit 2202, such as... Figure 23 As shown, the second determining unit 2301 is specifically used to determine the brightness distribution state of the first image region in the following manner:

[0210] Determine the first pixel with the highest brightness and the second pixel with the lowest brightness in the first image region;

[0211] If the difference between the brightness of the first pixel and the brightness of the second pixel is greater than a set first threshold, then the brightness distribution of the first image region is non-uniform; or,

[0212] If the difference between the brightness of the first pixel and the brightness of the second pixel is less than or equal to the first threshold, then the brightness distribution of the first image region is uniform.

[0213] In one possible implementation, the first determining unit 2202 is specifically used for:

[0214] If the brightness distribution of the first image region is uniform, then the average brightness of the first image region is determined based on the brightness of each pixel contained in the first image region.

[0215] The average brightness of the first image region is used as the backlight brightness value of the first image region.

[0216] In one possible implementation, the first determining unit 2202 is specifically used for:

[0217] If the brightness distribution of the first image region is non-uniform, then the distribution of bright pixels in the first image region is determined based on the brightness of each pixel in the first image region. The distribution of bright pixels refers to the distribution of bright pixels in the first image region. Bright pixels refer to pixels with brightness greater than a set brightness threshold. The distribution of bright pixels in the first image region can be either central or non-central.

[0218] Based on the distribution of bright pixels in the first image region, the backlight brightness value of the first image region is determined.

[0219] In one possible implementation, the first determining unit 2202 is specifically configured to determine the distribution of highlight pixels in the first image region in the following manner:

[0220] Determine the first number of bright pixels contained in the first image region and the second number of bright pixels contained in the central area of ​​the first image region;

[0221] If the ratio of the second quantity to the first quantity is greater than or equal to the set second threshold, then the distribution of the bright pixels in the first image region is determined to be a central distribution.

[0222] If the ratio of the second quantity to the first quantity is less than the second threshold, then the distribution of the bright pixels in the first image region is determined to be non-central.

[0223] In one possible implementation, the first determining unit 2202 is specifically used for:

[0224] If the distribution of bright pixels in the first image region is centrally distributed, then the average brightness of the first image region is determined based on the brightness of each pixel contained in the first image region.

[0225] The backlight brightness value of the first image region is determined based on the average brightness of the first image region, the ratio of the second quantity to the first quantity, and the second threshold.

[0226] In one possible implementation, the first determining unit 2202 is specifically configured as follows:

[0227] If the distribution of the highlighted pixels in the first image region is non-central, then the first image region is divided into multiple sub-regions.

[0228] The influencing factors corresponding to each sub-region were determined separately;

[0229] The backlight brightness value of the first image region is determined based on the influence factors corresponding to each sub-region.

[0230] In one possible implementation, the first determining unit 2202 is specifically configured to determine the influence factor corresponding to the first sub-region in the following manner, wherein the first sub-region is any one of the sub-regions:

[0231] Determine the first number of highlighted pixels contained in the first image region and the third number of highlighted pixels contained in the first sub-region;

[0232] If the ratio of the third quantity to the first quantity is less than or equal to a set third threshold, then the influence factor corresponding to the first sub-region is determined to be a set value.

[0233] If the ratio of the third quantity to the first quantity is greater than the third threshold, then the influence factor corresponding to the first sub-region is determined based on the average brightness of at least one adjacent image region adjacent to the first sub-region and the distance between the at least one adjacent image region and the first sub-region.

[0234] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0235] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to this application. It should be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0236] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0237] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0238] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A display device, characterized in that, Includes a processor, a display panel, and a backlight module located on the back of the display panel; The display panel is used to display images; The backlight module is used to provide backlight for the display panel, and the backlight module includes multiple backlight zones; The processor is configured as follows: The target image to be displayed is divided into multiple image regions according to the number of backlight partitions contained in the backlight module; each image region corresponds to one backlight partition. If the brightness distribution of the first image region is non-uniform, then the distribution of bright pixels in the first image region is determined based on the brightness of each pixel contained in the first image region; wherein, the brightness distribution of the first image region is determined based on the brightness of each pixel contained in the first image region; the brightness distribution of the first image region is either uniform or non-uniform; the first image region is any one of the plurality of image regions. If the distribution of bright pixels in the first image region is non-central, then the first image region is divided into multiple sub-regions; a first number of bright pixels contained in the first image region and a third number of bright pixels contained in the first sub-region are determined respectively; the first sub-region is any one of the multiple sub-regions; if the ratio of the third number to the first number is less than or equal to a set third threshold, then the influence factor corresponding to the first sub-region is determined to be a set value; if the ratio of the third number to the first number is greater than the third threshold, then at least one adjacent image region adjacent to the first sub-region and the average brightness of each of the at least one adjacent image region are determined; the average of the average brightness of each of the at least one adjacent image region is taken as the average brightness of the at least one adjacent image region; the average distance between the at least one adjacent image region and the first sub-region is taken as the average distance of the at least one adjacent image region; based on the average brightness and average distance of the at least one adjacent image region, the influence factor corresponding to the first sub-region is determined; based on the influence factors corresponding to the multiple sub-regions, the backlight brightness value of the first image region is determined. Adjust the backlight brightness of the corresponding backlight zone for each image area according to the backlight brightness value of each image area.

2. The display device according to claim 1, characterized in that, The processor is specifically configured to determine the brightness distribution state of the first image region in the following manner: Determine the first pixel with the highest brightness and the second pixel with the lowest brightness in the first image region; If the difference between the brightness of the first pixel and the brightness of the second pixel is greater than a set first threshold, then the brightness distribution of the first image region is non-uniform. If the difference between the brightness of the first pixel and the brightness of the second pixel is less than or equal to the first threshold, then the brightness distribution of the first image region is uniform.

3. The display device according to claim 1 or 2, characterized in that, The processor is specifically configured as follows: If the brightness distribution of the first image region is uniform, then the average brightness of the first image region is determined based on the brightness of each pixel contained in the first image region. The average brightness of the first image region is used as the backlight brightness value of the first image region.

4. The display device according to claim 1 or 2, characterized in that, The distribution of bright pixels refers to the distribution of bright pixels contained in the first image area; the bright pixels refer to pixels whose brightness is greater than a set brightness threshold; the distribution of bright pixels in the first image area can be central or non-central.

5. The display device according to claim 4, characterized in that, The processor is specifically configured to determine the distribution of highlight pixels in the first image region in the following manner: Determine the first number of bright pixels contained in the first image region and the second number of bright pixels contained in the central area of ​​the first image region; If the ratio of the second quantity to the first quantity is greater than or equal to the set second threshold, then the distribution of the bright pixels in the first image region is determined to be a central distribution. If the ratio of the second quantity to the first quantity is less than the second threshold, then the distribution of the bright pixels in the first image region is determined to be non-central.

6. The display device according to claim 5, characterized in that, The processor is specifically configured as follows: If the distribution of bright pixels in the first image region is centrally distributed, then the average brightness of the first image region is determined based on the brightness of each pixel contained in the first image region. The backlight brightness value of the first image region is determined based on the average brightness of the first image region, the ratio of the second quantity to the first quantity, and the second threshold.

7. A backlight adjustment method, characterized in that, The method includes: The target image to be displayed is divided into multiple image regions according to the number of backlight zones; each image region corresponds to one backlight zone. If the brightness distribution of the first image region is non-uniform, then the distribution of bright pixels in the first image region is determined based on the brightness of each pixel contained in the first image region; wherein, the brightness distribution of the first image region is determined based on the brightness of each pixel contained in the first image region; the brightness distribution of the first image region is either uniform or non-uniform; the first image region is any one of the plurality of image regions. If the distribution of bright pixels in the first image region is non-central, then the first image region is divided into multiple sub-regions; a first number of bright pixels contained in the first image region and a third number of bright pixels contained in the first sub-region are determined respectively; the first sub-region is any one of the multiple sub-regions; if the ratio of the third number to the first number is less than or equal to a set third threshold, then the influence factor corresponding to the first sub-region is determined to be a set value; if the ratio of the third number to the first number is greater than the third threshold, then at least one adjacent image region adjacent to the first sub-region and the average brightness of each of the at least one adjacent image region are determined; the average of the average brightness of each of the at least one adjacent image region is taken as the average brightness of the at least one adjacent image region; the average distance between the at least one adjacent image region and the first sub-region is taken as the average distance of the at least one adjacent image region; based on the average brightness and average distance of the at least one adjacent image region, the influence factor corresponding to the first sub-region is determined; based on the influence factors corresponding to the multiple sub-regions, the backlight brightness value of the first image region is determined. Adjust the backlight brightness of the corresponding backlight zone for each image area according to the backlight brightness value of each image area.

8. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by the processor, it implements the method of claim 7.

Images