Display device and display control method

Abstract

This application provides a display device and a display control method, relating to the field of display technology. The display device includes: a display configured to display an image to be displayed; and a controller configured to: determine the backlight display brightness of each backlight zone in the display based on the pixel brightness values ​​contained in each image zone of the image to be displayed; each image zone corresponds to at least one backlight zone; for any image zone, determine the target brightness of the backlight zone corresponding to the image zone based on the backlight display brightness and a preset electro-optical conversion function; the electro-optical conversion function is used to characterize the human eye's perception of brightness; and when displaying the image to be displayed, adjust the brightness corresponding to each backlight zone based on the target brightness. Using the above method, the contrast of the image to be displayed can be improved, enhancing the user's viewing experience.

Description

Technical Field

[0001] This application relates to the field of display, and more particularly to a display device and a display control method. Background Technology

[0002] With the development of display technology, display devices can usually dynamically adjust the peak brightness of the display based on the brightness of the image in order to better display the details of the image.

[0003] Currently, when adjusting peak brightness, the display's peak brightness is usually configured based on the average brightness of a single frame of an image.

[0004] However, within a single image frame, the brightness of different zones typically varies significantly. If the peak brightness of the display for each zone is configured based on the average brightness of the frame, then when the peak brightness of a zone with low image brightness is configured based on the average brightness, the display's peak brightness will be much higher than the original image brightness of that zone, resulting in overexposure. Conversely, when the peak brightness of a zone with high image brightness is configured based on the average brightness, the display's peak brightness will be much lower than the original image brightness of that zone, resulting in an overly dark scene and loss of detail. Consequently, the contrast of the displayed image cannot be improved, degrading the user's viewing experience. Summary of the Invention

[0005] This application provides a display device and a display control method that can improve the contrast of the image to be displayed on the monitor, making the details of the image to be displayed easier for the human eye to perceive.

[0006] In a first aspect, a display device is provided, including a display and a controller, the display being configured to display an image to be displayed; the controller being configured to perform the following process:

[0007] Based on the pixel brightness values ​​contained in each image partition of the image to be displayed, the backlight display brightness of each backlight partition in the display is determined; each image partition corresponds to at least one backlight partition.

[0008] For any image partition, the target brightness of the backlight partition corresponding to the image partition is determined based on the backlight display brightness and the preset electro-optical conversion function; the electro-optical conversion function is used to characterize the human eye's perception of brightness.

[0009] When displaying the image to be displayed, the brightness of each backlight zone is adjusted based on the target brightness.

[0010] In the above technical solution, since the image partitions of the image to be displayed correspond to at least one backlight partition in the display, the controller can determine the target brightness of the backlight partitions based on the actual distribution of pixel brightness in each image partition. Furthermore, when adjusting the brightness of each backlight partition based on the target brightness, it ensures that the image corresponding to the originally brighter or darker image area remains brighter or darker when displayed on the display. That is, it can solve the problem of overexposure or underexposure of the scene when the image to be displayed is shown, thereby improving the contrast of the image and making the details in the image easier for the human eye to perceive, thus improving the user's viewing experience. Moreover, determining the target brightness of the backlight partitions based on the backlight display brightness and a preset electro-optical conversion function ensures that the brightness of each backlight partition conforms to human visual perception, and also maintains the consistency of the brightness change relationship (from the change in backlight display brightness to the change in brightness of the corresponding backlight partition). In other words, it ensures that the brightness relationship between the brightness of each backlight partition in the final presentation is consistent with the brightness relationship between the pixel brightness values ​​of each image partition in the image to be displayed.

[0011] In some embodiments, the controller determines the backlight display brightness of each backlight zone in the display based on the pixel brightness values ​​contained in each image zone of the image to be displayed, and is configured as follows:

[0012] For any image partition, determine the average value of the pixel brightness values ​​contained in the image partition; determine the average value as the backlight display brightness of the backlight partition corresponding to the image partition.

[0013] In the above technical solutions, average brightness can typically reflect the overall brightness characteristics (e.g., brightness and contrast characteristics) of a display device under different usage scenarios. Based on this, determining the average pixel brightness value of an image partition as the backlight display brightness of the backlight partition allows the backlight display brightness of each backlight partition to better reflect the pixel brightness value of the corresponding image partition in the image to be displayed.

[0014] In some embodiments, the controller determines the target brightness of the backlight zone corresponding to the image zone based on the backlight display brightness and a preset electro-optical conversion function, and is configured as follows:

[0015] Determine the maximum display brightness of the monitor; input the backlight display brightness and the maximum display brightness into the electro-optical conversion function to obtain the target brightness.

[0016] In the above technical solution, the maximum display brightness reflects the maximum display capability of the monitor to display the image to be displayed. Based on this, determining the target brightness corresponding to the backlight display brightness based on the maximum display brightness can improve the brightness of the monitor when displaying the image to be displayed based on the target brightness, thereby preserving more detail information in the image to be displayed.

[0017] In some embodiments, when displaying an image to be displayed, the controller adjusts the brightness of each backlight zone based on the target brightness, as configured to:

[0018] When displaying the image to be displayed, adjust the brightness of each backlight zone to the target brightness.

[0019] In the above technical solution, when adjusting the brightness of each backlight zone based on the target brightness, the final image displayed on the monitor can be determined based on the actual brightness distribution of each image zone. This ensures that image zones that were originally brighter or darker are not affected by the peak brightness configured based on the average brightness. In other words, image zones that were originally brighter or darker will remain brighter or darker when the corresponding backlight zone on the monitor is displayed at the target brightness. This, in turn, improves the contrast of the displayed image, thereby enhancing the user's visual experience.

[0020] In some embodiments, when displaying an image to be displayed, the controller adjusts the brightness of each backlight zone based on the target brightness, as configured to:

[0021] Based on the pixel brightness values ​​in the image to be displayed, determine the average pixel brightness value of the image to be displayed; based on the average pixel brightness value, determine the peak brightness of the display; for any backlight zone, adjust the brightness of the corresponding backlight zone based on the target brightness and the peak brightness.

[0022] In the above technical solution, since the peak brightness is determined based on the average pixel brightness value of the entire image to be displayed, it can be considered that the backlight partition adjusted based on the peak brightness can keep the brightness of the image displayed by the corresponding image partition consistent when displaying the image corresponding to the corresponding image partition.

[0023] In some embodiments, the controller adjusts the brightness of the corresponding backlight zones based on the target brightness and peak brightness, and is configured as follows:

[0024] Determine the absolute value of the difference between the target brightness and the peak brightness; adjust the brightness of the corresponding backlight zones based on the absolute value of the difference.

[0025] In the above technical solution, selectively adjusting the brightness of the backlight zones based on the absolute value of the difference can achieve a balance in contrast and brightness consistency, thereby improving the user's visual experience.

[0026] In one embodiment, the controller adjusts the brightness of the corresponding backlight zones based on the absolute value of the difference, and is configured as follows:

[0027] When the absolute value of the difference is greater than the preset value, adjust the brightness of the corresponding backlight zone to the target brightness; when the absolute value of the difference is less than or equal to the preset value, adjust the brightness of the corresponding backlight zone to the peak brightness.

[0028] The above technical solution allows the controller to adjust the brightness of backlight zones corresponding to a target brightness for backlight zones with an absolute difference value greater than a preset value. Consequently, the target brightness of the backlight zones corresponding to originally brighter image zones becomes brighter, and the target brightness of the backlight zones corresponding to originally darker image zones becomes darker. This improves the contrast of the display when showing the image. Furthermore, when the absolute difference value is less than or equal to a preset value, the controller can adjust the brightness of the backlight zones corresponding to peak brightness. Since the peak brightness is calculated based on the average pixel brightness value of the image to be displayed, the peak brightness of each target backlight zone (i.e., the backlight zone with a difference value less than the preset value) can be consistent. This solves the problem of brightness differences on the display panel caused by uneven brightness among target backlight zones that are neither brighter nor darker, improving the user's visual experience.

[0029] Secondly, a display control method is provided, applied to the display device of the first aspect, the method comprising the following steps:

[0030] Based on the pixel brightness values ​​contained in each image partition of the image to be displayed, the backlight display brightness of each backlight partition in the display is determined; each image partition corresponds to at least one backlight partition; for any image partition, based on the backlight display brightness and a preset electro-optical conversion function, the target brightness of the backlight partition corresponding to the image partition is determined; the electro-optical conversion function is used to characterize the human eye's perception of brightness; when displaying the image to be displayed, the brightness of each backlight partition is adjusted based on the target brightness.

[0031] Thirdly, a computer-readable storage medium is provided, which stores a computer program that, when executed by a display device, causes the display device to perform the display control method of the second aspect.

[0032] Fourthly, a computer program product is provided, comprising: a computer program that, when run by a display device, causes the display device to execute the display control method of the second aspect.

[0033] It is understood that the beneficial effects of the second to fifth aspects mentioned above can be found in the relevant descriptions in the first aspect mentioned above, and will not be repeated here. Attached Figure Description

[0034] Figure 1 The diagram illustrates an operational scenario between a display device and a control device according to some embodiments of this application;

[0035] Figure 2 An exemplary block diagram of the configuration of the control device 100 according to an exemplary embodiment is shown;

[0036] Figure 3 An exemplary configuration block diagram of a display device 200 according to an exemplary embodiment is shown;

[0037] Figure 4 An exemplary system block diagram of a display device 200 is shown;

[0038] Figure 5 A timing interaction diagram of a display control method in a display device in some embodiments of this application is shown;

[0039] Figure 6 Example diagrams showing the correspondence between the image to be displayed and the backlight partitions in some embodiments of this application are shown;

[0040] Figure 7 Example diagrams showing the correspondence between the image to be displayed and the backlight partitions in some embodiments of this application are shown;

[0041] Figure 8 Example diagrams showing the correspondence between the image to be displayed and the backlight partitions in some embodiments of this application are shown;

[0042] Figure 9 A schematic diagram of the display control device is shown in some embodiments of this application. Detailed Implementation

[0043] The technical solutions of the embodiments of this application will be described below with reference to the accompanying drawings. In the description of the embodiments of this application, unless otherwise stated, " / " means "or," for example, A / B can mean A or B; "and / or" in this text is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Furthermore, in the description of the embodiments of this application, "multiple" refers to two or more than two.

[0044] Hereinafter, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," or "third" may explicitly or implicitly include one or more of that feature.

[0045] Specific details, such as particular system architectures and techniques, are set forth for illustrative purposes and not for limitation, to provide a thorough understanding of the embodiments of this application. However, those skilled in the art will understand that this application can be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods are omitted to avoid unnecessary detail that could obscure the description of this application.

[0046] The display device provided in this application can have various implementation forms, such as a television, a smart television, an electronic bulletin board, an electronic table, etc. Figure 1 and Figure 2 This is one specific embodiment of the display device of this application.

[0047] Figure 1 This illustration shows a schematic diagram of an operational scenario between a display device and a control device according to some embodiments of this application. For example... Figure 1 As shown, the user can operate the display device 200 through the smart device 300 or the control device 100.

[0048] In some embodiments, the control device 100 may be a remote control. Communication between the remote control and the display device includes infrared protocol communication, Bluetooth protocol communication, and other short-range communication methods, controlling the display device 200 wirelessly or via wired means. Users can control the display device 200 by inputting user commands through buttons on the remote control, voice input, control panel input, etc.

[0049] In some embodiments, a smart device 300 (such as a mobile terminal, tablet computer, computer, laptop computer, etc.) may also be used to control the display device 200. For example, an application running on the smart device may be used to control the display device 200.

[0050] In some embodiments, the display device may receive instructions not through the aforementioned smart devices or control devices, but through touch or gestures.

[0051] In some embodiments, the display device 200 can also be controlled in ways other than the control device 100 and the smart device 300. For example, it can be controlled by directly receiving the user's voice commands through a module configured inside the display device 200 for acquiring voice commands, or it can be controlled by receiving the user's voice commands through a voice control device set outside the display device 200.

[0052] In some embodiments, the display device 200 also communicates with the server 400. The display device 200 may communicate via a local area network (LAN), wireless local area network (WLAN), and other networks. The server 400 may provide various content and interactive features to the display device 200. The server 400 may be a cluster or multiple clusters, and may include one or more types of servers.

[0053] Figure 2 An exemplary block diagram of the configuration of the control device 100 according to an exemplary embodiment is shown. Figure 2 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 operation commands and convert the operation commands into commands that the display device 200 can recognize and respond to, thus acting as an intermediary for interaction between the user and the display device 200.

[0054] Figure 3 An exemplary configuration block diagram of a display device 200 according to an exemplary embodiment is shown, such as... Figure 3 As shown, the display device 200 includes at least one of the following: display 260, tuner 210, communicator 220, detector 230, external device interface 240, controller 250, audio output interface 270, memory, power supply, and user interface.

[0055] In some embodiments, the controller includes a processor, a video processor, an audio processor, a graphics processor, RAM, ROM, and a first interface to an nth interface for input / output.

[0056] The display 260 includes a display component for presenting display images, a backlight component for providing a light source, a driving component for driving the display of images, components for displaying video content, image content, and a menu control interface, and a user control UI interface.

[0057] The display component can be a liquid crystal panel, which consists of a liquid crystal molecule layer and electrodes that control the arrangement of the liquid crystal molecules. The liquid crystal panel displays images by controlling the transmission and blocking of light. The backlight component, or backlight source, is located behind or to the side of the liquid crystal panel and provides light. The backlight component can be an LED light source, a miniLED light source, etc., providing higher brightness and better color performance.

[0058] The display 260 may also include a local dimming component, which can realize local dimming; the local dimming component is used to control each backlight zone in the backlight assembly, and the local dimming component may be composed of multiple circuits that independently control the backlight zones, and can adjust the brightness of each backlight zone in real time according to the content of the displayed image.

[0059] The monitor 260 can be a liquid crystal display (LCD), an LED monitor, a 3D monitor, etc.

[0060] The communicator 220 is a component used to communicate with external devices or servers according to various communication protocol types. For example, the communicator may include at least one of the following: a Wi-Fi module, a Bluetooth module, a wired Ethernet module, other network communication protocol chips or near-field communication protocol chips, and an infrared receiver. The display device 200 can establish the transmission and reception of control signals and data signals with the control device 100 or the server 400 through the communicator 220.

[0061] The user interface can be used to receive control signals from the control device 100 (such as an infrared remote control).

[0062] Detector 230 is used to collect signals from the external environment or to interact with the external environment. For example, detector 230 includes a light receiver, a sensor for collecting ambient light intensity; or, detector 230 includes an image acquisition device, such as a camera, which can be used to collect external environmental scenes, user attributes, or user interaction gestures; or, detector 230 includes a sound acquisition device, such as a microphone, for receiving external sounds.

[0063] The external device interface 240 may include, but is not limited to, one or more of the following: High Definition Multimedia Interface (HDMI), analog or high-definition component input interface (component), composite video input interface (CVBS), USB input interface (USB), RGB port, etc. It may also be a composite input / output interface formed by multiple interfaces mentioned above.

[0064] The tuner / demodulator 210 receives broadcast television signals via wired or wireless means, and demodulates audio and video signals, such as EPG data signals, from multiple wireless or wired broadcast television signals.

[0065] In some embodiments, the controller 250 and the tuner 210 may be located in different separate devices, that is, the tuner 210 may also be located in an external device of the main device where the controller 250 is located, such as an external set-top box.

[0066] The controller 250 controls the operation of the display device and responds to user operations through various software control programs stored in the memory. The controller 250 controls the overall operation of the display device 200. For example, in response to receiving a user command to select a UI object to display on the monitor 260, the controller 250 can execute operations related to the object selected by the user command.

[0067] In some embodiments, the controller includes at least one of a central processing unit (CPU), a video processor, an audio processor, a graphics processing unit (GPU), RAM (random access memory), ROM (read-only memory), a first to an nth interface for input / output, a communication bus, etc.

[0068] Users can input 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, users can input commands by entering specific sounds or gestures, and the user input interface receives the user input commands by recognizing the sounds or gestures through sensors.

[0069] A "user interface" is the medium through which an application or operating system interacts and exchanges information with the user. It converts information from its internal form to a form that the user can accept. 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 visual interface elements such as icons, buttons, menus, tabs, text boxes, dialog boxes, status bars, navigation bars, and widgets.

[0070] Figure 4 An exemplary system block diagram of a display device 200 according to an exemplary embodiment is shown, such as Figure 4 As shown, in some embodiments, 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.

[0071] In some embodiments, at least one application runs in the application layer. These applications may be Windows programs, system settings programs, or clock programs that come with the operating system; they may also be applications developed by third-party developers. In specific implementations, the application packages in the application layer are not limited to the examples above.

[0072] The framework layer provides application programming interfaces (APIs) and a programming framework for applications. The application framework layer includes predefined functions. It acts as a central processing unit, determining the actions taken by applications within the application layer. Through the API, applications can access system resources and obtain system services during execution.

[0073] like Figure 4 As shown, the application framework layer in this embodiment includes managers, content providers, etc., wherein the managers include at least one of the following modules: ActivityManager, which interacts with all activities running in the system; LocationManager, which provides access to system location services for system services or applications; PackageManager, which retrieves various information related to application packages currently installed on the device; NotificationManager, which controls the display and clearing of notification messages; and WindowManager, which manages icons, windows, toolbars, wallpapers, and desktop widgets on the user interface.

[0074] In some embodiments, the Activity Manager manages the lifecycle of individual applications and common navigation and back functions, such as controlling application exit, opening, and back actions. The Window Manager manages all window programs, such as obtaining the screen size, determining if a status bar is present, locking the screen, capturing the screen, and controlling display window changes (e.g., shrinking the display window, shaking the display, distorting the display, etc.).

[0075] In some embodiments, the system runtime library layer provides support for the upper layer, namely the framework layer. When the framework layer is used, the Android operating system runs the C / C++ libraries contained in the system runtime library layer to implement the functions that the framework layer needs to perform.

[0076] In some embodiments, the kernel layer is a layer between hardware and software. For example... Figure 4 As shown, the kernel layer includes at least one of the following drivers: audio driver, display driver, Bluetooth driver, camera driver, WIFI driver, USB driver, HDMI driver, sensor driver (such as fingerprint sensor, temperature sensor, pressure sensor, etc.), and power driver.

[0077] It should be understood that the monitor plays a crucial role in display devices, and its peak brightness and uniformity can affect the image quality. High and uniform peak brightness makes the displayed image brighter and has higher contrast, thus ensuring good visibility in various environments and improving the user's visual experience.

[0078] Currently, when adjusting peak brightness, the display's peak brightness is usually configured based on the average brightness of a single frame of an image.

[0079] However, within a single image frame, the brightness of different zones typically varies significantly. If the peak brightness of the display for each zone is configured based on the average brightness of the frame, then when the peak brightness of a zone with low image brightness is configured based on the average brightness, the display's peak brightness will be much higher than the original image brightness of that zone, resulting in overexposure. Conversely, when the peak brightness of a zone with high image brightness is configured based on the average brightness, the display's peak brightness will be much lower than the original image brightness of that zone, resulting in an overly dark scene and loss of detail.

[0080] Based on this, in order to make the details in the image displayed on the monitor more easily perceived by the human eye, this application provides a display device and a display control method. This method can determine the backlight display brightness of each backlight zone in the monitor based on the pixel brightness values ​​contained in each image zone of the image to be displayed. Thus, the controller can determine the target brightness of the backlight zone based on the actual distribution of pixel brightness in each image zone. Furthermore, when adjusting the brightness of each backlight zone based on the target brightness, it can ensure that the image corresponding to an originally brighter or darker image area remains brighter or darker when displayed on the monitor. That is, it can solve the problem of overexposure or underexposure of the scene when the image to be displayed is shown, thereby achieving high contrast and making the details in the image to be displayed more easily perceived by the human eye, improving the user's viewing experience. Moreover, determining the target brightness of the backlight zone based on the backlight display brightness and a preset electro-optical conversion function can ensure that the brightness of each backlight zone conforms to human eye perception, and also maintain the consistency of the brightness change relationship (from the change in backlight display brightness to the change in brightness of the corresponding backlight zone). That is, to ensure that the brightness relationship between the brightness of each backlight zone in the final presentation is consistent with the brightness relationship between the pixel brightness values ​​of each image zone in the image to be displayed.

[0081] To facilitate a further understanding of the technical solutions in some embodiments of this application, the technical solutions of the display device and display control method, and how these solutions solve the aforementioned technical problems, are described in detail below with reference to specific embodiments and accompanying drawings. The embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of this application.

[0082] The display device includes a display and a controller, with the controller connected to the display; wherein the display is configured to display an image to be displayed.

[0083] Figure 5 The following is a timing interaction diagram of a display control method in a display device according to some embodiments of this application, such as... Figure 5 As shown, the controller is configured to perform the following steps:

[0084] S510. Based on the pixel brightness values ​​contained in each image partition of the image to be displayed, determine the backlight display brightness of each backlight partition in the display.

[0085] In some embodiments, the image to be displayed is an image that will be displayed on the display. The image to be displayed may be a photo, a frame of a video, a document, an application interface, etc., projected by the user to the display device via a smart device. It may also be a system interface, various display interfaces of an application, a frame of a video, a still image, a settings page, a scene captured by the camera in the display device, a game interface, an operation feedback page, etc., and there is no limitation thereto.

[0086] The image to be displayed can be obtained from a remote end, projected from a smart device, or pre-set in the display device; there are no restrictions on this.

[0087] In some embodiments, the controller can pre-set a partitioning method for the image to be displayed and the display, in order to determine each image partition and each backlight partition. As described above, the display 260 may also include a local dimming component for enabling local dimming. The local dimming component controls each backlight partition in the backlight assembly. The local dimming component may consist of multiple circuits that independently control each backlight partition, and can adjust the brightness of each backlight partition in real time according to the content of the displayed image. Therefore, the method for determining the backlight partitions can be considered an existing method and will not be described in detail.

[0088] Under normal circumstances, the controller can adjust the brightness of the image zones based on the local dimming component to achieve the backlight display brightness. However, this backlight display brightness may not be able to better reflect image detail. Therefore, it is necessary to redetermine the peak brightness based on the following steps.

[0089] The method for determining the partitions of the image to be displayed can be similar to or different from the method for determining the partitions of the display; there is no limitation on this. As an example, the controller can divide the image to be displayed into multiple image partitions of equal size and shape.

[0090] Alternatively, the controller can be pre-configured with a partitioning model to identify specific objects (people, animals, objects) in the image to be displayed and create image partitions based on these specific objects. For example, the image partitions could be divided into specific object partitions and background partitions. The background partition does not contain specific objects, while the specific object partition contains specific objects. A specific object partition can contain one or more specific objects, and each specific object will exist only within one specific object partition. Furthermore, when determining and adjusting the target brightness based on the backlight display brightness corresponding to the backlight partition, the brightness corresponding to a specific object can be consistent. Otherwise, if multiple specific object partitions each contain portions of a specific object, the inconsistent backlight display brightness across these partitions could lead to significant differences in the brightness of the specific object when displayed based on the adjusted brightness.

[0091] Based on the above description, this embodiment does not limit the method of determining image partitions.

[0092] It should be noted that each image partition corresponds to at least one backlight partition. That is, an image partition can correspond to one backlight partition or multiple backlight partitions. In this case, when one image partition corresponds to one backlight partition, the peak brightness of that backlight partition can be adjusted based on the pixel brightness value of the image partition. And when one image partition corresponds to multiple backlight partitions, the peak brightness of multiple backlight partitions can be adjusted based on the pixel brightness value of the image partition.

[0093] Figure 6 Example diagrams showing the correspondence between the image to be displayed and the backlight zones in some embodiments of this application are shown, such as... Figure 6 As shown, Figure 6 (b) shows the backlight zones in the backlight assembly; in this example, there are 24 backlight zones. Figure 6 In the middle (a), there is an image partition in the image to be displayed, and this image partition corresponds one-to-one with the backlight partition.

[0094] Figure 7 Example diagrams showing the correspondence between the image to be displayed and the backlight zones in some embodiments of this application are shown, such as... Figure 7 As shown, Figure 7 (b) shows the backlight zones in the backlight assembly; in this example, there are 24 backlight zones. Figure 7In (a), there are image partitions in the image to be displayed, where each image partition corresponds to four backlight partitions.

[0095] It should be understood that image partitions in the image to be displayed can be areas of the same size or areas of different sizes. Figure 8 Example diagrams showing the correspondence between the image to be displayed and the backlight zones in some embodiments of this application are shown, such as... Figure 8 As shown, Figure 8 (b) shows the backlight zones in the backlight assembly; in this example, there are 24 backlight zones. Figure 8 In (a), there are image partitions in the image to be displayed, some of which correspond to one backlight partition, some correspond to two backlight partitions, some correspond to three backlight partitions, and some correspond to four backlight partitions.

[0096] In some embodiments, the pixel brightness value can be considered as the brightness value of a pixel, ranging from 0 (black) to 255 (white), used to describe the brightness index of the image to be displayed.

[0097] As an example, an image partition typically comprises a large number of pixels. In this case, the controller can randomly select the pixel brightness value of one pixel as the pixel brightness value of the image partition; or, select the pixel brightness value of the pixel located at the center of the image partition; or, determine the average, maximum, or minimum value of the pixel brightness values ​​of all or multiple pixels contained in the image partition as the pixel brightness value of the image partition. In this embodiment, the method of determining the pixel brightness value is not limited.

[0098] It is important to note that average brightness typically reflects the overall brightness characteristics (e.g., brightness and contrast characteristics) of a display device under different usage scenarios. Based on this, the controller can determine the average value corresponding to each image partition as the backlight display brightness of the corresponding backlight partition. Furthermore, the backlight display brightness of each backlight partition can be better used to reflect the pixel value brightness of the corresponding image partition in the image to be displayed.

[0099] S520. For any image partition, determine the target brightness of the backlight partition corresponding to the image partition based on the backlight display brightness and the preset electro-optical conversion function.

[0100] In some embodiments, the electro-optic conversion function described above is used to characterize the human eye's perception of brightness. Exemplary examples include, but are not limited to, the SMPT2084 mapping function and the gamma function.

[0101] In this embodiment, to better match the target brightness determined based on the backlight display brightness with the human eye's perception of brightness and to more accurately present the high dynamic range, the electro-optical conversion function can be the SMPT2084 mapping function. Here, high dynamic range is synonymous with high contrast ratio; dynamic range is another way of describing contrast ratio. Contrast ratio is the ratio of the brightest to the darkest brightness that a display can achieve at any given time.

[0102] As a specific example, the above electro-optic conversion function can be specifically formulated as follows:

[0103]

[0104] Among them, L i Let L represent the backlight brightness of the backlight zone corresponding to the i-th image zone, where L is the preset display brightness of the monitor, and E is the backlight brightness of the i-th image zone. i This represents the normalized brightness value of the backlight display, where m, C1, C2, and C3 are all constants. For example, m = 0.1593017578, C1 = 0.8359375, C2 = 18.8515625, and C3 = 18.6875.

[0105] It should be noted that, in order to improve the brightness of the display when showing the image based on the target brightness and to retain more detail in the image, the preset display brightness mentioned above can be the maximum display brightness of the display. This maximum display brightness reflects the maximum display capability of the display of the image.

[0106] As an example, taking a case where the image partitions correspond one-to-one with the backlight partitions, the number of backlight partitions is 16, and the maximum display brightness is maxL = 500, the target brightness settings for each backlight partition can be shown in Table 1 below.

[0107] Table 1:

[0108] Backlight partition i Backlight display brightness <![CDATA[Normalized luminance value E i > Target brightness 1 10 0.03922 17.0095 2 13 0.05098 19 2670 3 14 0.05490 19.9607 4 15 0.05882 20 6306 5 18 0.07059 22 5215 6 20 0.07843 23.7008 7 25 0.09804 26.4374 8 30 0 11765 28.9515 9 45 0.17647 35.7190 10 50 0.19608 37.8245 11 100 0.39216 58.6112 12 100 0.39216 58.6112 13 110 0.43137 63.2188 14 120 0.47059 68.1554 15 240 0.94118 327.2818 16 255 1.00000 1581.8729

[0109] It should be added that, as explained above, when determining the target brightness of the backlight zones based on the backlight display brightness and the preset electro-optical conversion function, it is possible to ensure that the brightness of each backlight zone conforms to human visual perception, and also to maintain consistency in the brightness variation relationship (from the change in backlight display brightness to the change in brightness of the corresponding backlight zones). That is, the brightness relationship between the brightness of each backlight zone in the final presentation is consistent with the brightness relationship between the pixel brightness values ​​of each image zone in the image to be displayed.

[0110] S530: When displaying an image to be displayed, adjust the brightness of each backlight zone based on the target brightness.

[0111] In some embodiments, as can be seen from the example of step S502 above, the target brightness is more in line with human eye perception. Therefore, as an example, when displaying an image to be displayed, the controller can adjust the brightness of each backlight zone to the target brightness.

[0112] In some embodiments, each backlight zone includes at least one light source to adjust its corresponding brightness to a target brightness or peak brightness in response to an adjustment command from the controller. The display can then show the image to be displayed at the adjusted brightness.

[0113] It should be noted that, as described in S502 above, contrast ratio is the ratio of the brightest to the darkest brightness that the display can achieve at any given time. Based on this, when adjusting the brightness of each backlight zone according to the target brightness, the final image displayed on the display can be determined based on the actual brightness distribution of each image zone. This ensures that image zones that were originally brighter or darker are not affected by the peak brightness configured based on the average brightness. In other words, when the corresponding backlight zone of the display is displayed at the target brightness, the image zone that was originally brighter or darker will still appear brighter or darker. This, in turn, improves the contrast ratio of the displayed image, thereby enhancing the user's visual experience.

[0114] However, when adjusting the brightness of the backlight zones using the above method, for target backlight zones that are neither brighter nor darker than the original backlight zones, since the brightness of the target backlight zones is usually not consistent, there may be uneven brightness of the target backlight zones, which may cause brightness differences in the image to be processed displayed on the monitor, thus reducing the user's visual experience.

[0115] Therefore, in order to ensure brightness uniformity of the target backlight zone when the display shows the image while improving contrast, the controller can determine the average pixel brightness value of the image to be displayed based on the pixel brightness values ​​in the image, and then determine the peak brightness of the display based on the average pixel brightness value. Finally, for any backlight zone, the controller can adjust the corresponding brightness of the backlight zone based on the target brightness and the peak brightness.

[0116] The method for determining peak brightness can be similar to or different from the method for determining target brightness. For example, the peak brightness can be determined based on other preset electro-optic conversion functions, such as the gamma function described above.

[0117] It is understandable that since the peak brightness is determined based on the average pixel brightness value of the entire image to be displayed, it can be assumed that the backlight partition adjusted based on the peak brightness can maintain the brightness of the image displayed by the corresponding image partition.

[0118] As an example, the controller can adjust the brightness of the backlight zone to the target brightness when the target brightness is greater than or equal to the peak brightness; and adjust the brightness of the backlight zone to the peak brightness when the target brightness is less than the peak brightness.

[0119] Alternatively, when the target brightness is greater than or equal to the peak brightness, adjust the brightness of the backlight zone to the peak brightness; and when the target brightness is less than the peak brightness, adjust the brightness of the backlight zone to the target brightness.

[0120] It should be noted that while adjusting the brightness of backlight zones using the above method can adjust the brightness of all backlight zones with target brightness lower than peak brightness to the peak brightness, thus improving brightness consistency when displaying images, this method will cause overexposure of the images displayed in the darker backlight zones (those with target brightness lower than peak brightness) when displaying images in their corresponding image zones.

[0121] Furthermore, while it's possible to adjust the brightness of all backlight zones with a target brightness greater than or equal to the peak brightness to the peak brightness to improve brightness consistency when displaying an image, this method can result in brighter backlight zones (those with a target brightness greater than or equal to the peak brightness) displaying images that are too dark when displaying images in their corresponding image zones.

[0122] Therefore, in order to improve contrast and brightness consistency when displaying the image, the controller can determine the absolute value of the difference between the target brightness and the peak brightness. Then, based on the absolute value of the difference, the brightness of the corresponding backlight zones is adjusted.

[0123] For example, the controller can calculate the ratio of a first number of absolute differences greater than a preset value to the total number of absolute differences. Then, when this ratio is greater than the preset ratio, the image area to be displayed can be considered to consist mostly of brighter or darker image partitions. Furthermore, to improve contrast, the brightness of each image partition can be adjusted to the target brightness.

[0124] Furthermore, when the ratio is less than a preset ratio, the image area to be displayed can be considered to be mostly neither brighter nor darker image areas. Based on this, in order to improve brightness consistency, the controller can adjust the brightness of each image partition to the peak brightness.

[0125] Furthermore, by adjusting the brightness of the backlight zones in the above manner, the display can achieve a balance in contrast and brightness consistency of the displayed image when the brightness of the backlight zones is adjusted, thereby improving the user's visual experience.

[0126] It should be noted that selectively adjusting the brightness of the backlight zones based on the absolute value of the difference can achieve a balance in contrast and brightness consistency, thereby improving the user's visual experience.

[0127] In another embodiment, when the absolute value of the difference is greater than a preset value, the target brightness can be considered to be much greater than the peak brightness, or the target brightness can be much less than the peak brightness. Furthermore, the image partition corresponding to the absolute value of the difference can be determined as the image partition in the image to be displayed that was originally brighter or darker. Conversely, when the absolute value of the difference is less than or equal to a preset value, the image partition corresponding to the absolute value of the difference can be considered as an image partition in the image to be displayed that is neither brighter nor darker. In this case, the backlight partition corresponding to the non-brighter or non-darker image partition is the aforementioned target backlight partition. The preset value can be set according to actual conditions and is not limited thereto.

[0128] Based on this, in order to improve contrast, for backlight zones where the absolute value of the difference is greater than a preset value, the controller can adjust the brightness of the corresponding backlight zone to the target brightness. That is, the target brightness of the backlight zone corresponding to the originally brighter image zone is also brighter, and the target brightness of the backlight zone corresponding to the originally darker image zone is also darker. In turn, the contrast of the display when showing the image to be displayed is improved.

[0129] Furthermore, to ensure brightness consistency across target backlight zones, the controller can adjust the brightness of the corresponding backlight zone to its peak brightness when the absolute value of the difference is less than or equal to a preset value. Since the peak brightness is calculated based on the average pixel brightness of the image to be displayed, the peak brightness of each target backlight zone (i.e., the backlight zone corresponding to the absolute value of the difference less than the preset value) can be consistent. This solves the problem of brightness differences on the display panel caused by uneven brightness among target backlight zones that are neither brighter nor darker, thus improving the user's visual experience.

[0130] In this embodiment, since the image partitions of the image to be displayed correspond to at least one backlight partition in the display, the controller can determine the target brightness of the backlight partitions based on the actual distribution of pixel brightness in each image partition. Furthermore, when adjusting the brightness of each backlight partition based on the target brightness, it ensures that the image corresponding to the originally brighter or darker image area remains brighter or darker when displayed on the display. That is, it can solve the problem of overexposure or underexposure of the scene when the image to be displayed is shown, achieving high contrast and making the details in the image to be displayed more easily perceived by the human eye, thus improving the user's viewing experience. Moreover, determining the target brightness of the backlight partitions based on the backlight display brightness and a preset electro-optical conversion function ensures that the brightness of each backlight partition conforms to human visual perception, and also maintains consistency in the brightness change relationship (from the change in backlight display brightness to the change in brightness of the corresponding backlight partition). That is, it ensures that the brightness relationship between the brightness of each backlight partition in the final presentation is consistent with the brightness relationship between the backlight display brightness of each backlight partition in the image to be displayed.

[0131] It should be understood that the above examples are provided to help those skilled in the art understand the embodiments of this application, and are not intended to limit the embodiments of this application to the specific values ​​or scenarios illustrated. Those skilled in the art can obviously make various equivalent modifications or changes based on the above examples, and such modifications or changes also fall within the scope of the embodiments of this application.

[0132] The above text combined Figures 5 to 8 The present application describes in detail the display control method of its embodiments. The following will be combined with... Figure 9 This document describes in detail the device embodiments of this application. It should be understood that the display control device in the embodiments of this application can execute the various display control methods described in the foregoing embodiments of this application. That is, the specific working processes of the various products described below can be referred to the corresponding processes in the foregoing method embodiments.

[0133] Figure 9 A schematic diagram of the display control device is shown in some embodiments of this application.

[0134] It should be understood that the display control device 900 can perform... Figure 5 The display control method shown; the display control device 900 includes a first determining module 910, a second determining module 920, and an adjustment module 930, wherein:

[0135] The first determining module 910 is used to determine the backlight display brightness of each backlight zone in the display based on the pixel brightness values ​​contained in each image zone of the image to be displayed; each image zone corresponds to at least one backlight zone.

[0136] The second determining module 920 is used to determine the target brightness of the backlight partition corresponding to any image partition based on the backlight display brightness and a preset electro-optical conversion function; the electro-optical conversion function is used to characterize the human eye's perception of brightness.

[0137] The adjustment module 930 is used to adjust the brightness of each backlight zone based on the target brightness when displaying an image to be displayed.

[0138] Each module of the display control device 900 can execute the corresponding steps in the above method embodiment, so the details of each unit module will not be elaborated here. Please refer to the description of the corresponding steps above for details.

[0139] It should be noted that the aforementioned display control device 900 is embodied in the form of a functional module. The term "module" here can be implemented in software and / or hardware, without specific limitations.

[0140] For example, a "module" can be a software program, hardware circuit, or a combination of both that implements the above functions. Hardware circuits may include application-specific integrated circuits (ASICs), electronic circuits, processors (e.g., shared processors, proprietary processors, or group processors) and memory for executing one or more software or firmware programs, combined logic circuits, and / or other suitable components that support the described functions.

[0141] Therefore, the modules of the various examples described in the embodiments of this application can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the embodiments of this application.

[0142] like Figure 1 , Figure 2 As shown, the display device 200 can be used to implement the display control method described in the above method embodiments.

[0143] The display device 200 may include one or more memories storing programs that can be executed by the controller 250 to generate instructions, causing the controller 250 to execute the display control method described in the above method embodiments according to the instructions.

[0144] Optionally, the memory may also store data. Optionally, the controller 250 may also read data stored in the memory, which may be stored at the same memory address as the program, or the data may be stored at a different memory address than the program.

[0145] The controller 250 and the memory can be configured separately or integrated together; for example, integrated on the system-on-chip (SOC) of the terminal device.

[0146] This application also provides a computer program product that, when executed by the controller 250, implements the display control method of any method embodiment in this application.

[0147] The computer program product can be stored in memory, for example, as a program. The program is eventually converted into an executable object file that can be executed by the controller 250 after processes such as preprocessing, compilation, assembly and linking.

[0148] This application also provides a computer-readable storage medium storing a computer program thereon, which, when executed by a computer, implements the display control method of any of the method embodiments of this application. The computer program may be a high-level language program or an executable object program.

[0149] The computer-readable storage medium is, for example, memory. Memory can be volatile or non-volatile, or it can include both volatile and non-volatile memory. Non-volatile memory can be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. Volatile memory can be random access memory (RAM), which serves as an external cache. By way of example, but not limitation, many forms of RAM are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous linked dynamic random access memory (SLDRAM), and direct rambus RAM (DR RAM).

[0150] In this application, "at least one" means one or more, and "more than one" means two or more. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or multiple items. For example, at least one of a, b, or c can mean: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or multiple.

[0151] It should be understood that in the various embodiments of this application, the order of the above-mentioned processes does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0152] Those skilled in the art will recognize that the modules and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0153] Those skilled in the art will understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and modules described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0154] In the several embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for example, the division of modules is merely a logical functional division, and there may be other division methods in actual implementation; for example, multiple modules or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection between apparatuses or modules may be electrical, mechanical, or other forms.

[0155] The modules described as separate components may or may not be physically separate. Similarly, the components shown as modules may or may not be physical modules; they may be located in one place or distributed across multiple network modules. Some or all of the modules can be selected to achieve the purpose of this embodiment, depending on actual needs.

[0156] In addition, the functional modules in the various embodiments of this application can be integrated into one processing module, or each module can exist physically separately, or two or more modules can be integrated into one module.

[0157] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A display device, characterized in that, include: The monitor is configured to display the image to be displayed; The controller is configured as follows: Based on the pixel brightness values ​​contained in each image partition of the image to be displayed, the backlight display brightness of each backlight partition in the display is determined; each image partition corresponds to at least one backlight partition; For any of the image partitions, the target brightness of the backlight partition corresponding to the image partition is determined based on the backlight display brightness and a preset electro-optical conversion function; The electro-optic conversion function is used to characterize the human eye's perception of brightness; When displaying the image to be displayed, the brightness of each of the backlight zones is adjusted based on the target brightness.

2. The display device according to claim 1, characterized in that, The controller determines the backlight display brightness of each backlight zone in the display based on the pixel brightness values ​​contained in each image zone of the image to be displayed, and is configured as follows: For any of the image partitions, determine the average value of the pixel brightness values ​​contained in the image partition; The average value is determined as the backlight display brightness of the backlight zone corresponding to the image zone.

3. The display device according to claim 1, characterized in that, The controller, based on the backlight display brightness and a preset electro-optical conversion function, determines the target brightness of the backlight zone corresponding to the image zone, and is configured as follows: Determine the maximum display brightness of the display; The backlight display brightness and the maximum display brightness are input into the electro-optic conversion function to obtain the target brightness.

4. The display device according to any one of claims 1-3, characterized in that, When displaying the image to be displayed, the controller adjusts the brightness of each backlight zone based on the target brightness, and is configured as follows: When displaying the image to be displayed, the brightness of each of the backlight zones is adjusted to the target brightness.

5. The display device according to any one of claims 1-3, characterized in that, When displaying the image to be displayed, the controller adjusts the brightness of each backlight zone based on the target brightness, and is configured as follows: Based on the pixel brightness values ​​in the image to be displayed, determine the average pixel brightness value of the image to be displayed; The peak brightness of the display is determined based on the average pixel brightness value; For any of the backlight zones, adjust the brightness of the corresponding backlight zone based on the target brightness and the peak brightness.

6. The display device according to claim 5, characterized in that, The controller adjusts the brightness of the corresponding backlight zone based on the target brightness and the peak brightness, and is configured as follows: Determine the absolute value of the difference between the target brightness and the peak brightness; The brightness of the corresponding backlight zone is adjusted based on the absolute value of the difference.

7. The display device according to claim 6, characterized in that, The controller adjusts the brightness of the corresponding backlight zone based on the absolute value of the difference, and is configured as follows: When the absolute value of the difference is greater than a preset value, the brightness of the backlight zone is adjusted to the target brightness. When the absolute value of the difference is less than or equal to the preset value, the brightness of the corresponding backlight zone is adjusted to the peak brightness.

8. A display control method, characterized in that, The display control method, applied to a display device as described in any one of claims 1-7, comprises: Based on the pixel brightness values ​​contained in each image partition of the image to be displayed, the backlight display brightness of each backlight partition in the display is determined; each image partition corresponds to at least one backlight partition; For any of the image partitions, based on the backlight display brightness and a preset electro-optical conversion function, the target brightness of the backlight partition corresponding to the image partition is determined; the electro-optical conversion function is used to characterize the human eye's perception of brightness. When displaying the image to be displayed, the brightness of each of the backlight zones is adjusted based on the target brightness.

9. The method according to claim 8, characterized in that, Determining the backlight display brightness of each backlight zone in the display based on the pixel brightness values ​​contained in each image zone of the image to be displayed includes: For any of the image partitions, determine the pixel brightness value of at least one pixel contained in the image partition; The backlight display brightness is determined based on the pixel brightness value of the at least one pixel.

10. The method according to claim 8, characterized in that, The step of determining the target brightness of the backlight zone corresponding to the image zone based on the backlight display brightness and a preset electro-optical conversion function includes: Determine the maximum display brightness of the display; The backlight display brightness and the maximum display brightness are input into the electro-optic conversion function to obtain the target brightness.

Images