Display device and backlight adjusting method

Abstract

The invention relates to display equipment and a backlight adjusting method, and relates to the technical field of display equipment. The display device comprises a display, a backlight assembly, a power supply and a controller. Wherein the controller is respectively coupled with the display, the backlight assembly and the power supply, and is configured to confirm that the display equipment is in a light sensation mode under the condition that the light sensation mode switch state of the display equipment is an on state, and obtain the illumination intensity of the environment where the display equipment is located; determining a target global PWM from the global PWM associated with the average brightness and the global PWM associated with the interval to which the illumination intensity belongs according to the relationship between the average brightness of the to-be-displayed image and the preset average brightness under the condition that the interval to which the illumination intensity of the environment of the display equipment belongs is located in the preset brightness interval; and the control power supply adjusts the brightness of the backlight source of each backlight partition based on the target global PWM. According to the invention, the image display effect of the display device with fewer partitions can be improved when the ambient light is dark.

Description

Technical Field

[0001] The present application relates to the technical field of display devices, and in particular to a display device and a backlight adjustment method. Background Art

[0002] In order to achieve a thin effect or save costs, some display devices (such as smart TVs) use a local dimming solution with fewer partitions. That is, these display devices have fewer local dimming partitions, such as only one row of partitions, resulting in a larger area controlled by each partition.

[0003] In traditional technology, for display devices with fewer partitions, when Local Dimming takes effect, the entire partition area corresponding to the bright position of the screen will become brighter, forming a bright ball; for example, the startup logo (trademark) is in the middle, and the rest of the area is black. You can see a bright band from top to bottom of the startup logo in the middle. This phenomenon is particularly obvious when the ambient light is relatively dim, resulting in poor display effect of display devices with fewer partitions when the ambient light is dim. Summary of the Invention

[0004] The present application provides a display device and an AI super-resolution engine control method to solve the technical problem that a display device with fewer partitions has poor picture display effects when the ambient light is dim.

[0005] In a first aspect, some embodiments provide a display device comprising: a display, a backlight assembly, a power supply, and a controller. The backlight assembly comprises fewer than a predetermined number of backlight sub-areas, each of which comprises at least one backlight source. The controller is coupled to the display, the backlight assembly, and the power supply, respectively, and is configured to:

[0006] Obtaining the light sensing mode switch status of the display device;

[0007] When the light-sensing mode switch state of the display device is on, confirming that the display device is in the light-sensing mode, and obtaining the light intensity of the environment in which the display device is located;

[0008] When the illumination intensity of the environment in which the display device is located falls within a preset brightness range, obtaining the average brightness of the image to be displayed on the display; the preset brightness range is used to represent the range from the lowest brightness to the preset brightness;

[0009] Determining a target global PWM from a global PWM associated with the average brightness and a global PWM associated with the interval to which the light intensity belongs, according to a relationship between the average brightness of the image to be displayed and a preset average brightness;

[0010] The power supply is controlled to adjust the brightness of the backlight source of each backlight partition based on the target global PWM.

[0011] Technical effect: First, obtain the light-sensing mode switch state of the display device. When the light-sensing mode switch state of the display device is on, confirm that the display device is in light-sensing mode, and obtain the light intensity of the environment in which the display device is located. Then, when the light intensity interval of the environment in which the display device is located is within the preset brightness interval, obtain the average brightness of the image to be displayed on the display. Then, based on the relationship between the average brightness of the image to be displayed and the preset average brightness, determine the target global PWM from the global PWM associated with the average brightness and the global PWM associated with the light intensity interval. Finally, control the power supply to adjust the brightness of the backlight source of each backlight partition based on the target global PWM. In this way, for a display device with a number of backlight partitions less than a preset number, when the illumination intensity interval of the environment in which it is located is within the preset brightness interval, the brightness of the backlight source of each backlight partition is adjusted according to the global PWM associated with the average brightness of the image to be displayed on the display, or the global PWM associated with the illumination intensity interval; wherein the global PWM associated with the average brightness of the image to be displayed is a PWM suitable for dark field display, which can adaptively reduce the backlight brightness of the display device based on the average brightness of the image to be displayed, thereby making the black screen of the display darker, without light leakage, and without whitening, thereby improving the display device when the ambient light is dim. the picture display effect; in addition, the global PWM associated with the illumination intensity interval can adaptively adjust the backlight brightness of the display device according to the illumination intensity of the environment in which the display device is located, so as to adapt to the viewing environment in a dark field, thereby optimizing the picture display effect, and further improving the picture display effect of the display device when the ambient light is dim; in this way, when adjusting the brightness of the backlight source of each backlight partition, the global PWM associated with the average brightness of the image to be displayed and the global PWM associated with the illumination intensity interval are comprehensively considered, which is conducive to optimizing the picture display effect in a dark field as a whole, thereby improving the picture display effect of the display device with fewer partitions when the ambient light is dim.

[0012] In some embodiments of the present application, the controller performs the step of determining, based on the relationship between the average brightness of the image to be displayed and the preset average brightness, a target global PWM from the global PWM associated with the average brightness and the global PWM associated with the interval to which the light intensity belongs, and is specifically configured as follows:

[0013] When the average brightness of the image to be displayed is less than the preset average brightness, screening out a minimum global PWM from the global PWM associated with the average brightness and the global PWM associated with the interval to which the illumination intensity belongs, and determining the minimum global PWM as the target global PWM;

[0014] When the average brightness of the image to be displayed is greater than or equal to the preset average brightness, the global PWM associated with the interval to which the illumination intensity belongs is confirmed as the target global PWM.

[0015] Technical effect: When the average brightness of the image to be displayed is less than the preset average brightness, the minimum global PWM between the global PWM associated with the average brightness and the global PWM associated with the interval to which the illumination intensity belongs is used as the target global PWM; when the average brightness of the image to be displayed is greater than or equal to the preset average brightness, the global PWM associated with the interval to which the illumination intensity belongs is used as the target global PWM, thereby achieving the purpose of determining the optimal global PWM based on the relationship between the average brightness of the image to be displayed and the preset average brightness, and facilitating the subsequent adaptive adjustment of the brightness of the backlight source of each backlight partition through the optimal global PWM to optimize the picture display effect in dark fields, thereby improving the picture display effect of display devices with fewer partitions when the ambient light is dark.

[0016] In some embodiments of the present application, before determining the target global PWM from the global PWM associated with the average brightness and the global PWM associated with the interval to which the light intensity belongs based on the relationship between the average brightness of the image to be displayed and the preset average brightness, the controller is further configured to:

[0017] Querying the correlation between the average brightness and the global PWM to obtain the global PWM associated with the average brightness;

[0018] The association relationship between the interval to which the light intensity belongs and the global PWM is queried to obtain the global PWM associated with the interval to which the light intensity belongs.

[0019] Technical effect: By querying the correlation between average brightness and global PWM, it is helpful to quickly obtain the global PWM associated with the average brightness, thereby improving the efficiency of determining the global PWM associated with the average brightness; at the same time, by querying the correlation between the interval to which the light intensity belongs and the global PWM, it is helpful to quickly obtain the global PWM associated with the interval to which the light intensity belongs, thereby improving the efficiency of determining the global PWM associated with the interval to which the light intensity belongs.

[0020] In some embodiments of the present application, the controller performs the step of controlling the power supply to adjust the brightness of the backlight source of each backlight partition based on the target global PWM, and is specifically configured to:

[0021] When the regional light control switch state of the display device is on, obtaining the current required brightness of the backlight source of each backlight partition;

[0022] The power supply is controlled to adjust the brightness of the backlight source of each backlight partition based on the target global PWM and the current required brightness of the backlight source of each backlight partition.

[0023] Technical effect: When the regional light control switch state of the display device is on, the brightness of the backlight source of each backlight zone is adjusted accordingly according to the current required brightness of the backlight source of each backlight zone, which is conducive to achieving precise adjustment of the backlight zone brightness, thereby optimizing the picture display effect; at the same time, according to the target global PWM, the brightness of the backlight source of each backlight zone is comprehensively adjusted, which is conducive to achieving global adjustment of the backlight zone brightness, thereby optimizing the picture display effect; in this way, by comprehensively considering the target global PWM and the current required brightness of the backlight source of each backlight zone, it is conducive to optimizing the picture display effect of the display device in the dark field as a whole.

[0024] In some embodiments of the present application, the controller performs the step of obtaining the current required brightness of the backlight source of each backlight subarea, and is specifically configured to:

[0025] Performing division processing on the image to be displayed to obtain a partition image corresponding to each backlight partition;

[0026] Obtaining the image brightness of the partition image corresponding to each backlight partition, and obtaining the current gear position of the regional light control switch state and the current signal source type of the display device;

[0027] According to the image brightness of the partition image corresponding to each backlight partition, the brightness mapping relationship corresponding to the interval to which the light intensity belongs, the current gear and the current signal source type is queried to obtain the current required brightness of the backlight source of each backlight partition; the brightness mapping relationship is used to represent the mapping relationship between the image brightness of the backlight partition and the required brightness of the backlight source.

[0028] Technical effect: According to the image brightness of the partition image corresponding to each backlight partition, the brightness mapping relationship corresponding to the light intensity interval, the current gear of the regional light control switch state and the current signal source type is queried, which is conducive to quickly and accurately obtaining the current required brightness of the backlight source of each backlight partition, thereby improving the efficiency and accuracy of determining the current required brightness of the backlight source of each backlight partition.

[0029] In some embodiments of the present application, when the light-sensing mode switch state of the display device is on, after confirming that the display device is in the light-sensing mode and obtaining the light intensity of the environment in which the display device is located, the controller is further configured to:

[0030] When the illumination intensity range of the environment in which the display device is located is not within the preset brightness range, determining whether the state of the regional light control switch of the display device is on;

[0031] When the regional light control switch state of the display device is on, obtaining the current required brightness of the backlight source of each backlight partition and the global PWM associated with the interval to which the light intensity belongs;

[0032] The power supply is controlled to adjust the brightness of the backlight source of each backlight partition based on the current required brightness of the backlight source of each backlight partition and the global PWM associated with the interval to which the illumination intensity belongs.

[0033] Technical effect: When the illumination intensity interval of the environment in which the display device is located is not within the preset brightness interval and the regional light control switch state of the display device is on, the control power supply adjusts the brightness of the backlight source of each backlight partition based on the current required brightness of the backlight source of each backlight partition and the global PWM associated with the illumination intensity interval; in this way, when adjusting the brightness of the backlight source of each backlight partition, the current required brightness of the backlight source of each backlight partition and the global PWM associated with the illumination intensity interval are comprehensively considered, which is conducive to optimizing the picture display effect of the display device when it is not in the preset brightness interval.

[0034] In some embodiments of the present application, when the illumination intensity range of the environment in which the display device is located is not within the preset brightness range, after determining whether the local light control switch state of the display device is on, the controller is further configured to:

[0035] When the state of the regional light control switch of the display device is off, obtaining the global PWM associated with the interval to which the light intensity belongs and the global PWM associated with the average brightness;

[0036] When the average brightness is less than the preset average brightness, controlling the power supply to adjust the brightness of the backlight source of each backlight partition based on the global PWM associated with the average brightness;

[0037] When the average brightness is greater than or equal to the preset average brightness, the power supply is controlled to adjust the brightness of the backlight source of each backlight partition based on the global PWM associated with the interval to which the light intensity belongs.

[0038] Technical effect: When the illumination intensity interval of the environment in which the display device is located is not within the preset brightness interval and the regional light control switch state of the display device is in the off state, the control power supply adjusts the brightness of the backlight source of each backlight partition based on the global PWM associated with the average brightness of the image to be displayed or the global PWM associated with the illumination intensity interval; in this way, when adjusting the brightness of the backlight source of each backlight partition, the global PWM associated with the average brightness of the image to be displayed and the global PWM associated with the illumination intensity interval of the environment in which the display device is located are comprehensively considered, which is conducive to optimizing the picture display effect of the display device when it is not in the preset brightness interval.

[0039] In some embodiments of the present application, after obtaining the light sensing mode switch state of the display device, the controller is further configured to:

[0040] When the light-sensing mode switch state of the display device is off, confirming that the display device is in a non-light-sensing mode, and determining whether the regional light control switch state of the display device is on;

[0041] When the local light control switch state of the display device is on, obtaining the global PWM associated with the non-light sensing mode and the current required brightness of the backlight source of each backlight partition;

[0042] The power supply is controlled to adjust the brightness of the backlight source of each backlight partition based on the global PWM associated with the non-light sensing mode and the current required brightness of the backlight source of each backlight partition.

[0043] Technical effect: When the display device is in the non-light-sensitive mode and the regional light control switch state of the display device is on, the control power supply adjusts the brightness of the backlight source of each backlight partition based on the global PWM associated with the non-light-sensitive mode and the current required brightness of the backlight source of each backlight partition; in this way, when adjusting the brightness of the backlight source of each backlight partition, the global PWM associated with the non-light-sensitive mode and the current required brightness of the backlight source of each backlight partition are comprehensively considered, which is conducive to optimizing the picture display effect of the display device in the non-light-sensitive mode.

[0044] In some embodiments of the present application, when the light-sensing mode switch state of the display device is off, after confirming that the display device is in the non-light-sensing mode and determining whether the regional light control switch state of the display device is on, the controller is further configured to:

[0045] When the local light control switch state of the display device is off, obtaining the global PWM associated with the non-light sensing mode and the global PWM associated with the average brightness;

[0046] When the average brightness is less than the preset average brightness, controlling the power supply to adjust the brightness of the backlight source of each backlight partition based on the global PWM associated with the average brightness;

[0047] When the average brightness is greater than or equal to the preset average brightness, the power supply is controlled to adjust the brightness of the backlight source of each backlight partition based on the global PWM associated with the non-light sensing mode.

[0048] Technical effect: When the display device is in the non-light-sensitive mode and the regional light control switch state of the display device is in the off state, the control power supply adjusts the brightness of the backlight source of each backlight partition based on the global PWM associated with the non-light-sensitive mode or the global PWM associated with the average brightness of the image to be displayed; in this way, when adjusting the brightness of the backlight source of each backlight partition, the global PWM associated with the non-light-sensitive mode and the global PWM associated with the average brightness of the image to be displayed are comprehensively considered, which is conducive to optimizing the picture display effect of the display device in the non-light-sensitive mode.

[0049] In a second aspect, some embodiments further provide a backlight adjustment method, applied to a display device, the display device comprising a display, a backlight assembly, a power supply, and a controller; the backlight assembly comprising fewer than a preset number of backlight partitions, each backlight partition comprising at least one backlight source; the controller being coupled to the display, the backlight assembly, and the power supply, respectively; the method comprising:

[0050] Obtaining the light sensing mode switch status of the display device;

[0051] When the light-sensing mode switch state of the display device is on, confirming that the display device is in the light-sensing mode, and obtaining the light intensity of the environment in which the display device is located;

[0052] When the illumination intensity of the environment in which the display device is located falls within a preset brightness range, obtaining the average brightness of the image to be displayed on the display; the preset brightness range is used to represent the range from the lowest brightness to the preset brightness;

[0053] Determining a target global PWM from a global PWM associated with the average brightness and a global PWM associated with the interval to which the light intensity belongs, according to a relationship between the average brightness of the image to be displayed and a preset average brightness;

[0054] The power supply is controlled to adjust the brightness of the backlight source of each backlight partition based on the target global PWM.

[0055] Technical effect: First, obtain the light-sensing mode switch state of the display device. When the light-sensing mode switch state of the display device is on, confirm that the display device is in light-sensing mode, and obtain the light intensity of the environment in which the display device is located. Then, when the light intensity interval of the environment in which the display device is located is within the preset brightness interval, obtain the average brightness of the image to be displayed on the display. Then, based on the relationship between the average brightness of the image to be displayed and the preset average brightness, determine the target global PWM from the global PWM associated with the average brightness and the global PWM associated with the light intensity interval. Finally, control the power supply to adjust the brightness of the backlight source of each backlight partition based on the target global PWM. In this way, for a display device with a number of backlight partitions less than a preset number, when the illumination intensity interval of the environment in which it is located is within the preset brightness interval, the brightness of the backlight source of each backlight partition is adjusted according to the global PWM associated with the average brightness of the image to be displayed on the display, or the global PWM associated with the illumination intensity interval; wherein the global PWM associated with the average brightness of the image to be displayed is a PWM suitable for dark field display, which can adaptively reduce the backlight brightness of the display device based on the average brightness of the image to be displayed, thereby making the black screen of the display darker, without light leakage, and without whitening, thereby improving the display device when the ambient light is dim. the picture display effect; in addition, the global PWM associated with the illumination intensity interval can adaptively adjust the backlight brightness of the display device according to the illumination intensity of the environment in which the display device is located, so as to adapt to the viewing environment in a dark field, thereby optimizing the picture display effect, and further improving the picture display effect of the display device when the ambient light is dim; in this way, when adjusting the brightness of the backlight source of each backlight partition, the global PWM associated with the average brightness of the image to be displayed and the global PWM associated with the illumination intensity interval are comprehensively considered, which is conducive to optimizing the picture display effect in a dark field as a whole, thereby improving the picture display effect of the display device with fewer partitions when the ambient light is dim. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0057] Figure 1 A schematic diagram of an operation scenario between a display device and a control device provided in some embodiments of the present application;

[0058] Figure 2 A schematic diagram of the hardware configuration of a display device provided in some embodiments of the present application;

[0059] Figure 3 A schematic diagram of the hardware configuration of a control device provided in some embodiments of the present application;

[0060] Figure 4 A schematic diagram of software configuration of a display device provided in some embodiments of the present application;

[0061] Figure 5 A schematic flow chart of a backlight adjustment method provided in some embodiments of the present application;

[0062] Figure 6 A flowchart illustrating a method for optimizing the display effect in dark field for a Local Dimming model with fewer partitions provided in other embodiments of the present application;

[0063] Figure 7 A flowchart illustrating steps for determining a target global PWM according to some embodiments of the present application;

[0064] Figure 8 A flowchart illustrating steps for obtaining a global PWM associated with average brightness and a global PWM associated with a light intensity interval provided in some embodiments of the present application;

[0065] Figure 9 A schematic flow chart of steps for adjusting the brightness of the backlight source of each backlight partition provided in some embodiments of the present application;

[0066] Figure 10 A schematic flow chart of the steps of obtaining the current required brightness of the backlight source of each backlight partition provided in some embodiments of the present application;

[0067] Figure 11 A schematic flow chart of steps for adjusting the brightness of the backlight source of each backlight partition provided in other embodiments of the present application;

[0068] Figure 12 A schematic flow chart of steps for adjusting the brightness of the backlight source of each backlight partition provided in further embodiments of the present application;

[0069] Figure 13 A schematic flow chart of steps for adjusting the brightness of the backlight source of each backlight partition provided in some further embodiments of the present application;

[0070] Figure 14 A schematic flow chart of steps for adjusting the brightness of a backlight source of a backlight partition provided in some embodiments of the present application;

[0071] Figure 15 A signaling interaction diagram of a backlight adjustment method provided in some embodiments of the present application;

[0072] Figure 16This is a structural block diagram of a backlight adjustment device provided in some embodiments of the present application. DETAILED DESCRIPTION

[0073] The following embodiments are described in detail, with examples illustrated in the accompanying drawings. When the following description refers to the drawings, identical numbers in different figures represent identical or similar elements unless otherwise indicated. The embodiments described in the following embodiments are not intended to represent all possible implementations consistent with the present application. They are merely examples of systems and methods consistent with certain aspects of the present application, as detailed in the claims.

[0074] It should be noted that the brief descriptions of terms in this application are only for the purpose of facilitating the understanding of the embodiments described below, and are not intended to limit the embodiments of this application. Unless otherwise specified, these terms should be understood according to their ordinary and usual meanings.

[0075] In the specification and claims of this application and the accompanying drawings, the terms "first," "second," "third," etc. are used to distinguish similar or similar objects or entities, and are not necessarily intended to limit a particular order or sequence, unless otherwise noted. It should be understood that the terms used in this manner are interchangeable under appropriate circumstances.

[0076] The terms "comprise," "include," and "have," and any variations thereof, are intended to cover but not exclude inclusion; for example, a product or device comprising a list of components is not necessarily limited to all the components expressly listed but may include other components not expressly listed or inherent to such product or device.

[0077] The term "module" refers to any known or later developed hardware, software, firmware, artificial intelligence, fuzzy logic, or combination of hardware and / or software code that is capable of performing the functionality associated with that element.

[0078] In the embodiments of the present application, the display device 200 generally refers to a device capable of displaying images and processing data. For example, the display device 200 includes but is not limited to a smart TV, a mobile terminal, a computer, a monitor, an advertising screen, a wearable device, a virtual reality device, an augmented reality device, etc.

[0079] Figure 1 This is a schematic diagram of an operation scenario between a display device and a control device provided in some embodiments of the present application. Figure 1 As shown in FIG, a user can operate the display device 200 through touch operation, the mobile terminal 300 and the control device 100. For example, the control device 100 can be a remote controller, a stylus pen, a handle, etc.

[0080] The mobile terminal 300 can function as a control device for performing human-computer interaction between a user and the display device 200. The mobile terminal 300 can also function as a communication device for establishing a communication connection with the display device 200 and exchanging data. In some embodiments, the mobile terminal 300 can install software applications with the display device 200, enabling connection and communication via a network communication protocol, 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 synchronized display.

[0081] like Figure 1 As shown in FIG, the display device 200 also communicates data with the server 400 through various communication methods. The display device 200 may be allowed to communicate via a local area network (LAN), a wireless local area network (WLAN), and other networks.

[0082] The display device 200 may provide a broadcast receiving television function, and may also additionally provide an intelligent network television function with a computer support function, including but not limited to network television, smart TV, Internet Protocol television (IPTV), etc.

[0083] Figure 2 Some embodiments of this application provide Figure 1 2 is a block diagram of the hardware configuration of the display device 200.

[0084] In some embodiments, the display device 200 may include at least one of a tuner 210, a communication device 220, a detector 230, a device interface 240, a controller 250, a display 260, an audio output device 270, a backlight assembly 280, a memory, a power supply 290, and a user input interface.

[0085] In some embodiments, detector 230 is used to collect signals from the external environment or external interactions. For example, detector 230 may include a light receiver, such as a sensor for collecting ambient light intensity; or an image collector, such as a camera, for collecting external environmental scenes, user attributes, or user interaction gestures; or a sound collector, such as a microphone, for receiving external sounds.

[0086] In some embodiments, the display 260 includes a display component for presenting images and a driver component for driving image display. The display 260 is configured to receive image signals output from the controller 250 for display. For example, the display 260 can be used to display video content, image content, menu control interface components, and user control UI interfaces.

[0087] In some embodiments, the communication device 220 is a component used to communicate with an external device or server 400 according to various communication protocol types. The display device 200 can be provided with multiple communication devices 220 depending on the supported communication methods. For example, if the display device 200 supports wireless network communication, the display device 200 can be provided with a communication device 220 including WiFi functionality. If the display device 200 supports Bluetooth connection communication, the display device 200 needs to be provided with a communication device 220 including Bluetooth functionality.

[0088] The communication device 220 can establish a communication connection between the display device 200 and an external device or server 400 via a wireless or wired connection. A wired connection can connect the display device 200 to an external device via a data cable, an interface, or other components. A wireless connection can connect the display device 200 to an external device via a wireless signal or wireless network. The display device 200 can establish a connection with an external device directly or indirectly through a gateway, router, or connection device.

[0089] In some embodiments, the controller 250 may include at least one of a central processing unit (CPU), a video processor, an audio processor, a graphics processor, and a power processor, as well as first to nth interfaces for input / output. The controller 250 controls the operation of the display device and responds to user operations through various software control programs stored in a memory. The controller 250 controls the overall operation of the display device 200. Furthermore, the controller 250 may also control the power supply 290 to adjust the brightness of the backlight source of each backlight sub-area in the backlight assembly 280.

[0090] 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.

[0091] In some embodiments, the user may input a user command through a graphical user interface (GUI) displayed on the display 260 , and the user input interface receives the user input command through the graphical user interface (GUI).

[0092] In some embodiments, the audio output device 270 may be a local speaker of the display device 200, or an external audio output device connected to the display device 200. For the external audio output device connected to the display device 200, the display device 200 may further be provided with an external audio output terminal, through which the audio output device may be connected to the display device 200 to output the sound of the display device 200.

[0093] In some embodiments, the user input interface may be configured to receive instructions from a user.

[0094] In some embodiments, the backlight assembly 280 includes a plurality of backlight partitions, and the number of the backlight partitions is less than a preset number (eg, there is only one row of backlight partitions); each backlight partition includes at least one backlight source.

[0095] In some embodiments, the power supply 290 is used to adjust the brightness of the backlight source of each backlight partition in the backlight assembly 280 under the control of the controller 250 .

[0096] Figure 3 Some embodiments of this application provide Figure 1 The hardware configuration diagram of the control device in the figure. Figure 3 As shown, the control device 100 may include: a controller 110, a communication interface 130, a user input / output interface, a memory, and a power supply.

[0097] The control device 100 is configured to control the display device 200 , and can receive user input operation instructions, and convert the operation instructions into instructions that the display device 200 can recognize and respond to, playing the role of an interactive intermediary between the user and the display device 200 .

[0098] In some embodiments, the control device 100 may be a smart device. For example, the control device 100 may be installed with various applications for controlling the display device 200 according to user needs.

[0099] In some embodiments, as Figure 1 As shown, the mobile terminal 300 or other intelligent electronic devices can play a similar function as the control device 100 after installing the application for controlling the display device 200 .

[0100] The controller 110 includes a processor 112, RAM 113, ROM 114, a communication interface 130, and a communication bus. The controller 110 is used to control the operation and operation of the control device 100, as well as the communication and cooperation between internal components and external and internal data processing functions.

[0101] Under the control of the controller 110, the communication interface 130 communicates control signals and data signals with the display device 200. The communication interface 130 may include at least one of a WiFi chip 131, a Bluetooth module 132, an NFC module 133, or other near field communication modules.

[0102] The user input / output interface 140 includes at least one of a microphone 141 , a touch panel 142 , a sensor 143 , a button 144 and other input interfaces.

[0103] In some embodiments, the control device 100 includes at least one of a communication interface 130 and an input / output interface 140. The control device 100 is configured with the communication interface 130, such as a WiFi, Bluetooth, or NFC module, to encode user input commands via the WiFi protocol, Bluetooth protocol, or NFC protocol and transmit them to the display device 200.

[0104] The memory 190 is used to store various operating programs, data and applications for driving and controlling the control device 100 under the control of the controller. The memory 190 can store various control signal instructions input by the user.

[0105] The power supply 180 is used to provide operating power support for each component of the control device 100 under the control of the controller.

[0106] To facilitate user interaction, in some embodiments, the display device 200 may run an operating system. The operating system is a computer program for managing and controlling the hardware and software resources in the display device 200. The operating system may provide a user interface (control the display device), allow the user to interact with the display device 200, and support the running of various application programs.

[0107] It should be noted that the operating system may be a native operating system based on a specific operating platform, or a third-party operating system deeply customized based on a specific operating platform, or an independent operating system specially developed for the display device.

[0108] The operating system can be divided into different modules or layers according to the functions implemented, e.g. Figure 4 As shown, in some embodiments, the system is divided into four layers, from top to bottom, namely, the application layer (referred to as "application layer"), the application framework layer (referred to as "framework layer"), the system library layer and the kernel layer.

[0109] In some embodiments, the application layer provides services and interfaces for applications, enabling the display device 200 to run applications and interact with the user based on the applications. The application layer can host at least one application, which can include built-in window programs, system settings programs, clock programs, and the like, or applications developed by third-party developers. In specific implementations, the application packages in the application layer are not limited to the examples above.

[0110] The framework layer provides applications with an application programming interface (API) and programming framework. The application framework layer includes predefined functions. The application framework layer acts as a processing center, determining the actions taken by applications in the application layer. Through the API, applications can access system resources and services during execution.

[0111] like Figure 4 As shown, in the embodiment of the present application, the application framework layer includes a view system, managers, content providers, etc., wherein the view system can design and implement the interface and interaction of the application, and the view system includes lists, grids, text boxes, buttons, etc. The manager includes at least one of the following modules: an activity manager for interacting with all activities running in the system; a location manager for providing system services or applications with access to the system location service; a package manager for retrieving various information related to the application packages currently installed on the device; a notification manager for controlling the display and clearing of notification messages; and a window manager for managing icons, windows, toolbars, wallpapers, and desktop widgets on the user interface.

[0112] In some embodiments, the activity manager is used to manage the lifecycle of each application and common navigation back functions, such as controlling application exit, opening, and back. The window manager is used to manage all window programs, such as obtaining the display screen size, determining whether there is a status bar, locking the screen, taking screenshots, and controlling changes in display windows, such as shrinking, shaking, or distorting the display window.

[0113] In some embodiments, the system runtime layer can provide support for the framework layer. When the framework layer is used, the operating system will run the instruction library contained in the system runtime layer, such as the C / C++ instruction library, to implement the functions to be implemented by the framework layer.

[0114] In some embodiments, the kernel layer is a functional layer between the hardware and software of the display device 200. The kernel layer can implement functions such as hardware abstraction, multitasking, and memory management. Figure 4As shown, the kernel layer can be configured with hardware drivers, and the drivers included in the kernel layer can be 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, etc.

[0115] It should be noted that the above example is only a simple division of the operating system functions and does not constitute a limitation on the specific operating system form of the display device 200 in the embodiment of the present application. Depending on factors such as the function of the display device and the type of operating system, the number of levels and specific level types contained in the operating system may be expressed in other forms.

[0116] In some embodiments, as Figure 1 and Figure 2 As shown, the present application provides a display device 200, which may include a display 260, a backlight assembly 280, a power supply 290 and a controller 250; the number of backlight partitions included in the backlight assembly 280 is less than a preset number, and each backlight partition includes at least one backlight source; the controller 250 is coupled to the display 260, the backlight assembly 280 and the power supply 290 respectively.

[0117] like Figure 5 As shown, the controller 250 is configured to:

[0118] Step S501 , obtaining the light sensing mode switch state of the display device 200 .

[0119] Step S502 : When the light-sensing mode switch state of the display device 200 is on, confirm that the display device 200 is in the light-sensing mode, and obtain the light intensity of the environment where the display device 200 is located.

[0120] Step S503 , when the illumination intensity of the environment in which the display device 200 is located is within a preset brightness range, obtain the average brightness of the image to be displayed on the display 260 ; the preset brightness range is used to represent the range from the lowest brightness to the preset brightness.

[0121] Step S504 : According to the relationship between the average brightness of the image to be displayed and the preset average brightness, a target global PWM is determined from the global PWM associated with the average brightness and the global PWM associated with the interval to which the light intensity belongs.

[0122] In step S505 , the control power supply 290 adjusts the brightness of the backlight source of each backlight partition based on the target global PWM.

[0123] The number of backlight partitions of the display device 200 is relatively small, for example, there is only one row of backlight partitions or one column of backlight partitions.

[0124] Among them, the preset number can be adjusted according to actual conditions, and this application does not limit it specifically.

[0125] Each backlight partition includes at least one backlight source, which may be a backlight lamp, a light bead, a light bar, or the like.

[0126] Among them, there are two states of the light-sensing mode switch state, one is the on state and the other is the off state. The on state indicates that the display device 200 is in the light-sensing mode, and can determine the associated global PWM (Pulse Width Modulation) according to the light intensity of the environment in which the display device 200 is located, and adaptively adjust the brightness of the backlight source of each backlight partition through the associated global PWM. The off state indicates that the display device 200 is in a non-light-sensing mode, such as bright light mode, soft light mode, dynamic frequency conversion mode, energy-saving mode, etc., and cannot adaptively adjust the brightness of the backlight source of each backlight partition according to the light intensity of the environment in which the display device 200 is located.

[0127] The light intensity of the environment in which the display device 200 is located is obtained by the ambient light intensity sensor of the display device 200. According to the order of the light intensity of the environment in which the display device 200 is located from low to high, the light intensity of the environment in which the display device 200 is located can be divided into at least two brightness intervals, such as a low brightness interval, a medium brightness interval, and a high brightness interval. For example, according to the order of the light intensity of the environment in which the display device 200 is located from low to high, it is divided into 9 intervals, namely intervals 0-8, and each interval is associated with a corresponding light intensity PWM; intervals 0, 1, and 2 are called low brightness intervals, intervals 3, 4, and 5 are called medium brightness intervals, and intervals 6, 7, and 8 are called high brightness intervals.

[0128] Among them, the minimum brightness refers to 0, and the preset brightness can be adjusted according to actual conditions, which is not specifically limited in this application.

[0129] The preset brightness range refers to a low brightness range. For example, when the illumination intensity range of the environment where the display device 200 is located is any one of the ranges 0, 1, and 2, it means that the illumination intensity range of the environment where the display device 200 is located is in a low brightness range.

[0130] The image to be displayed refers to the image currently to be displayed on the display 260. The average brightness of the image to be displayed refers to the weighted average brightness value of all pixels of the image to be displayed, which is used to quantify the overall brightness of the image.

[0131] The preset average brightness refers to the average brightness threshold corresponding to the 0D module (dark field optimization module) of the display device 200.

[0132] PWM refers to a pulse width modulation signal, which controls the brightness of the backlight source of each backlight partition by adjusting the on-time ratio (duty cycle) of the backlight source of each backlight partition.

[0133] The target global PWM refers to a global PWM associated with the average brightness, or a global PWM associated with the interval to which the light intensity belongs, and is specifically determined according to a relationship between the average brightness of the image to be displayed and a preset average brightness.

[0134] Among them, the global PWM associated with average brightness is a PWM suitable for dark field display. It can adaptively reduce the backlight brightness of the display device 200 based on the average brightness of the image to be displayed, thereby making the black screen of the display darker, without light leakage and whitening, thereby improving the picture display effect of the display device 200 when the ambient light is darker.

[0135] Among them, the global PWM associated with the light intensity interval is a PWM related to light intensity, which can adaptively adjust the backlight brightness of the display device 200 according to the light intensity of the environment in which the display device 200 is located to adapt to the dark viewing environment, thereby optimizing the picture display effect.

[0136] Among them, adjusting the brightness of the backlight source of each backlight partition based on the target global PWM means determining the on-time ratio (duty cycle) of the backlight source of each backlight partition based on the target global PWM, thereby adjusting the brightness of the backlight source of each backlight partition by the on-time ratio of the backlight source of each backlight partition, thereby achieving the purpose of brightness adjustment of the backlight partition.

[0137] Specifically, refer to Figure 2, the controller 250 obtains the light-sensing mode switch state of the display device 200 from the UI (User Interface) module of the display device 200; then determines whether the light-sensing mode switch state of the display device 200 is on; if so, confirms that the display device 200 is in light-sensing mode, and obtains the light intensity of the environment in which the display device 200 is located through the ambient light intensity sensor of the display device 200; then, determines the interval to which the light intensity of the environment in which the display device 200 is located, and based on the correspondence between the interval to which the light intensity belongs and the brightness interval (for example, the intervals 0, 1, and 2 are called low brightness intervals), determines whether the interval to which the light intensity of the environment in which the display device 200 is located is in the preset brightness interval (i.e., the low brightness interval); if so, obtains the weighted average brightness value of all pixels of the image to be displayed on the display 260, and calculates the value based on the display The weighted average of the brightness values of all pixels of the image to be displayed on the display 260 is calculated to determine the average brightness of the image to be displayed on the display 260; then, the global PWM associated with the average brightness and the global PWM associated with the interval to which the light intensity belongs are obtained, and according to the relationship between the average brightness of the image to be displayed and the preset average brightness, the target global PWM is determined from the global PWM associated with the average brightness and the global PWM associated with the interval to which the light intensity belongs, that is, the target global PWM may be the global PWM associated with the average brightness or the global PWM associated with the interval to which the light intensity belongs; finally, the target global PWM is sent to the power supply 290, so that the power supply 290 adjusts the on-time ratio of the backlight source of each backlight partition based on the target global PWM, thereby adjusting the brightness of the backlight source of each backlight partition.

[0138] For example, refer to Figure 6, the controller 250 obtains the average brightness value of the video (or the average brightness value of the image) through the Energy thread, and then determines whether the light sense is on. If so, it is confirmed that the display device 200 is in the light sense mode, and then obtains the light intensity of the environment in which the display device 200 is located through the ambient light intensity sensor of the display device 200, and determines the range of the light intensity of the environment in which the display device 200 is located; when the range is any one of the intervals 0, 1, and 2, it means that the light intensity of the environment in which the display device 200 is located is in the low brightness range, then By querying the correlation between the brightness interval and PWM, the PWM associated with the interval of the light intensity of the environment in which the display device 200 is located is obtained; then, the 0D function is turned on, and it is determined whether the average brightness value is less than the 0D threshold. If not, the PWM associated with the low-brightness interval is sent to the power supply 290. If so, the correlation between the average brightness value and PWM is queried to obtain the PWM of 0D. Then, it is determined whether the PWM of 0D is less than the PWM associated with the interval. If so, the PWM of 0D is sent to the power supply 290. If not, the PWM associated with the low-brightness interval is sent to the power supply 290. Furthermore, when LD is on, the controller 250 also calculates the corresponding Ldindex (Ldindex is an effect curve for all partitions in the current scene. According to the image brightness values of the partition images of different partitions, the Ldindex is queried to obtain the required brightness value of the backlight source of the corresponding partition), and then, according to the image brightness values of the partition images of each partition of the display device 200, the calculated Ldindex is queried to obtain the required brightness value of the backlight source of each partition (i.e., LD data), and the required brightness value of the backlight source of each partition is sent to the power supply 290.

[0139] Continue to refer Figure 6When the illumination intensity of the environment in which the display device 200 is located is in the medium brightness range or the high brightness range (for example, when the interval is any one of the intervals 3, 4, and 5, it indicates that the illumination intensity of the environment in which the display device 200 is located is in the medium brightness range; when the interval is any one of the intervals 6, 7, and 8, it indicates that the illumination intensity of the environment in which the display device 200 is located is in the high brightness range), the controller 250 obtains the illumination intensity of the environment in which the display device 200 is located by querying the correlation between the brightness interval and the PWM. The PWM associated with the interval in which the brightness is located is then determined. If so, 0D is turned off and the corresponding Ldindex is calculated based on the medium-bright interval or the high-bright interval, the signal source type of the display device 200 (such as SDR, HDR) and the LD gear (such as high, medium and low). Then, based on the image brightness value of the partition image of each partition of the display device 200, the calculated Ldindex is queried to obtain the required brightness value of the backlight source of each partition. Finally, the required brightness value of the backlight source of each partition and the PWM associated with the interval are sent to the power supply 290. If LD is off, 0D is turned on and it is determined whether the average brightness value is less than the threshold of 0D. If not, the PWM associated with the medium-bright interval or the high-bright interval is sent to the power supply 290. If so, the association between the average brightness value and PWM is queried to obtain the PWM of 0D, and the PWM of 0D is sent to the power supply 290.

[0140] Continue to refer Figure 6 When the light sense is off, the controller 250 confirms that the display device 200 is in other modes (such as bright light mode, soft light mode, dynamic frequency conversion mode, energy-saving mode), and then determines whether LD is on. If so, 0D is turned off, and the PWM corresponding to the other modes is determined according to the correspondence between other modes and PWM. Then, according to the signal source type (such as SDR, HDR) and LD gear (such as high, medium and low) of the display device 200, the corresponding Ldindex is calculated. Then, according to the image brightness value of the partition image of each partition of the display device 200, the calculated Ldindex is queried to obtain the required brightness value of the backlight source of each partition. Finally, the required brightness value of the backlight source of each partition and the PWM corresponding to other modes are sent to the power supply 290. If LD is off, the PWM corresponding to the other modes is determined based on the correspondence between other modes and PWM, and the 0D function is turned on. Then, it is determined whether the average brightness value is less than the 0D threshold. If not, the PWM corresponding to the other modes is sent to the power supply 290. If so, the correlation between the average brightness value and PWM is queried to obtain the 0D PWM, and the 0D PWM is sent to the power supply 290.

[0141] The technical solution provided in this embodiment first obtains the light-sensing mode switch state of the display device. When the light-sensing mode switch state of the display device is on, it is confirmed that the display device is in the light-sensing mode, and the light intensity of the environment in which the display device is located is obtained. Then, when the interval to which the light intensity of the environment in which the display device is located is within a preset brightness interval, the average brightness of the image to be displayed of the display is obtained. Then, based on the relationship between the average brightness of the image to be displayed and the preset average brightness, the target global PWM is determined from the global PWM associated with the average brightness and the global PWM associated with the interval to which the light intensity belongs. Finally, the power supply is controlled to adjust the brightness of the backlight source of each backlight partition based on the target global PWM. In this way, for a display device with a number of backlight partitions less than a preset number, when the illumination intensity interval of the environment in which it is located is within the preset brightness interval, the brightness of the backlight source of each backlight partition is adjusted according to the global PWM associated with the average brightness of the image to be displayed on the display, or the global PWM associated with the illumination intensity interval; wherein the global PWM associated with the average brightness of the image to be displayed is a PWM suitable for dark field display, which can adaptively reduce the backlight brightness of the display device based on the average brightness of the image to be displayed, thereby making the black screen of the display darker, without light leakage, and without whitening, thereby improving the display device when the ambient light is dim. the picture display effect; in addition, the global PWM associated with the illumination intensity interval can adaptively adjust the backlight brightness of the display device according to the illumination intensity of the environment in which the display device is located, so as to adapt to the viewing environment in a dark field, thereby optimizing the picture display effect, and further improving the picture display effect of the display device when the ambient light is dim; in this way, when adjusting the brightness of the backlight source of each backlight partition, the global PWM associated with the average brightness of the image to be displayed and the global PWM associated with the illumination intensity interval are comprehensively considered, which is conducive to optimizing the picture display effect in a dark field as a whole, thereby improving the picture display effect of the display device with fewer partitions when the ambient light is dim.

[0142] In some embodiments, as Figure 7 As shown, the controller 250 performs the step of determining a target global PWM from the global PWM associated with the average brightness and the global PWM associated with the interval to which the light intensity belongs based on the relationship between the average brightness of the image to be displayed and the preset average brightness, which is specifically configured as follows:

[0143] Step S701 : When the average brightness of the image to be displayed is less than the preset average brightness, the smallest global PWM is selected from the global PWM associated with the average brightness and the global PWM associated with the illumination intensity interval, and the smallest global PWM is determined as the target global PWM.

[0144] Step S702 : When the average brightness of the image to be displayed is greater than or equal to the preset average brightness, the global PWM associated with the interval to which the light intensity belongs is determined as the target global PWM.

[0145] Among them, the smallest global PWM may be the global PWM associated with the average brightness, or it may be the global PWM associated with the interval to which the light intensity belongs.

[0146] Specifically, refer to Figure 2 , the controller 250 determines whether the average brightness of the image to be displayed is less than the preset average brightness. If so, it continues to determine whether the global PWM associated with the average brightness is less than the global PWM associated with the interval to which the illumination intensity belongs. If so, the global PWM associated with the average brightness is confirmed as the target global PWM. If not, the global PWM associated with the interval to which the illumination intensity belongs is confirmed as the target global PWM. When the average brightness of the image to be displayed is greater than or equal to the preset average brightness, the global PWM associated with the interval to which the illumination intensity belongs is confirmed as the target global PWM. For details, please refer to Figure 6 .

[0147] The technical solution provided by this embodiment uses the minimum global PWM between the global PWM associated with the average brightness and the global PWM associated with the interval to which the illumination intensity belongs as the target global PWM when the average brightness of the image to be displayed is less than the preset average brightness; and uses the global PWM associated with the interval to which the illumination intensity belongs as the target global PWM when the average brightness of the image to be displayed is greater than or equal to the preset average brightness. This achieves the purpose of determining the optimal global PWM based on the relationship between the average brightness of the image to be displayed and the preset average brightness, and is conducive to the subsequent adaptive adjustment of the brightness of the backlight source of each backlight partition through the optimal global PWM to optimize the picture display effect in dark fields, thereby improving the picture display effect of display devices with fewer partitions when the ambient light is dark.

[0148] In some embodiments, as Figure 8 As shown, before determining the target global PWM from the global PWM associated with the average brightness and the global PWM associated with the interval to which the light intensity belongs based on the relationship between the average brightness of the image to be displayed and the preset average brightness, the controller 250 is further configured to:

[0149] Step S801 : query the correlation between average brightness and global PWM to obtain the global PWM correlated with the average brightness.

[0150] Step S802 : query the association relationship between the interval to which the light intensity belongs and the global PWM, and obtain the global PWM associated with the interval to which the light intensity belongs.

[0151] There is a one-to-one correspondence between the average brightness and the global PWM; there is a one-to-one correspondence between the light intensity interval and the global PWM.

[0152] It should be noted that the correlation between the average brightness and the global PWM, and the correlation between the interval to which the light intensity belongs and the global PWM are pre-stored in the memory of the display device 200 .

[0153] Specifically, refer to Figure 2 , the controller 250 obtains the correlation relationship between the average brightness and the global PWM from the memory of the display device 200, and queries the correlation relationship between the average brightness and the global PWM based on the average brightness of the image to be displayed, and obtains the global PWM associated with the average brightness of the image to be displayed; then, the controller 250 obtains the correlation relationship between the interval to which the light intensity belongs and the global PWM from the memory of the display device 200, and queries the correlation relationship between the interval to which the light intensity belongs and the global PWM based on the interval to which the light intensity belongs in the environment where the display device 200 is located, and obtains the global PWM associated with the interval to which the light intensity belongs in the environment where the display device 200 is located.

[0154] The technical solution provided in this embodiment is conducive to quickly obtaining the global PWM associated with the average brightness by querying the correlation between the average brightness and the global PWM, thereby improving the efficiency of determining the global PWM associated with the average brightness; at the same time, by querying the correlation between the interval to which the light intensity belongs and the global PWM, it is conducive to quickly obtaining the global PWM associated with the interval to which the light intensity belongs, thereby improving the efficiency of determining the global PWM associated with the interval to which the light intensity belongs.

[0155] In some embodiments, as Figure 9 As shown, the controller 250 executes the step of controlling the power supply 290 to adjust the brightness of the backlight source of each backlight partition based on the target global PWM, which is specifically configured as follows:

[0156] Step S901 : when the local light control switch of the display device 200 is in the on state, obtaining the current required brightness of the backlight source of each backlight partition.

[0157] In step S902 , the control power supply 290 adjusts the brightness of the backlight source of each backlight partition based on the target global PWM and the current required brightness of the backlight source of each backlight partition.

[0158] Among them, the regional light control switch state of the display device 200 is on, indicating that the display device 200 can perform the regional light control function, that is, it can obtain the current required brightness of the backlight source of each backlight partition, and adjust the brightness of the backlight source of each backlight partition according to the current required brightness of the backlight source of each backlight partition.

[0159] Among them, adjusting the brightness of the backlight source of each backlight partition based on the target global PWM and the current required brightness of the backlight source of each backlight partition means determining the final PWM of the backlight source of each backlight partition based on the target global PWM and the current required brightness of the backlight source of each backlight partition, and adjusting the brightness of the backlight source of each backlight partition according to the final PWM of the backlight source of each backlight partition.

[0160] Specifically, refer to Figure 2 , when the regional light control switch state of the display device 200 is on, the controller 250 can also determine the current required brightness of the backlight source of each backlight partition according to the image brightness of the partition image corresponding to each backlight partition, and then determine the basic PWM corresponding to each backlight partition according to the current required brightness of the backlight source of each backlight partition. For example, if the current required brightness of the backlight source of a backlight partition is 204, then the basic PWM corresponding to the backlight source of the backlight partition is 204 / 255=0.8; where 255 refers to the maximum brightness value; then according to the target image, the basic PWM corresponding to the backlight source of the target image is 0.8. The global PWM is marked (for example, 0.9), and the basic PWM corresponding to each backlight partition is updated to obtain the target PWM corresponding to each backlight partition. For example, if the basic PWM corresponding to the backlight source of a certain backlight partition is 0.8, then the target PWM corresponding to the backlight partition is 0.8×0.9=0.72. Finally, the target PWM corresponding to each backlight partition is sent to the power supply 290, so that the power supply 290 adjusts the on-time ratio of the backlight source of each backlight partition based on the target PWM corresponding to each backlight partition, thereby adjusting the brightness of the backlight source of each backlight partition.

[0161] The technical solution provided in this embodiment is to adjust the brightness of the backlight source of each backlight zone accordingly according to the current required brightness of the backlight source of each backlight zone when the regional light control switch state of the display device is on, which is conducive to achieving precise adjustment of the brightness of the backlight zone, thereby optimizing the picture display effect; at the same time, according to the target global PWM, the brightness of the backlight source of each backlight zone is comprehensively adjusted, which is conducive to achieving global adjustment of the brightness of the backlight zone, thereby optimizing the picture display effect; in this way, by comprehensively considering the target global PWM and the current required brightness of the backlight source of each backlight zone, it is conducive to optimizing the picture display effect of the display device in the dark field as a whole.

[0162] In some embodiments, as Figure 10 As shown, the controller 250 performs the step of obtaining the current required brightness of the backlight source of each backlight partition, which is specifically configured as follows:

[0163] Step S1001 : dividing the image to be displayed to obtain a partition image corresponding to each backlight partition.

[0164] Step S1002 , obtaining the image brightness of the partition image corresponding to each backlight partition, and obtaining the current gear position of the regional light control switch state and the current signal source type of the display device 200 .

[0165] Step S1003, according to the image brightness of the partition image corresponding to each backlight partition, query the brightness mapping relationship corresponding to the light intensity interval, the current gear and the current signal source type, and obtain the current required brightness of the backlight source of each backlight partition; the brightness mapping relationship is used to represent the mapping relationship between the image brightness of the backlight partition and the required brightness of the backlight source.

[0166] The partition image corresponding to each backlight partition refers to an image block corresponding to each backlight partition.

[0167] The image brightness of the partition image corresponding to each backlight partition refers to the weighted average brightness value of all pixels in the partition image corresponding to each backlight partition.

[0168] The regional light control switch state can be divided into at least two gears, such as high, medium and low. Different gears are used to represent different regional light control levels.

[0169] The current signal source type of the display device 200 refers to the signal source type of the signal source currently received by the display device 200, such as SDR and HDR.

[0170] Among them, each group of light intensity interval, current gear and current signal source type corresponds to a brightness mapping relationship, such as Figure 6 Moreover, there is a corresponding relationship between (the range of light intensity, the current gear, and the current signal source type) and the brightness mapping relationship.

[0171] Among them, in the brightness mapping relationship, there is a one-to-one correspondence between the image brightness of the backlight partition and the required brightness of the backlight source; for example, according to the image brightness of the partition image corresponding to each backlight partition of the display device 200, the brightness mapping relationship can be queried to obtain the current required brightness of the backlight source of each backlight partition.

[0172] Specifically, refer to Figure 2, the controller 250 divides the image to be displayed on the display 260 according to the number of backlight partitions of the display device 200, and obtains a partition image corresponding to each backlight partition; then calculates the weighted average of the brightness values of all pixels of the partition image corresponding to each backlight partition, and obtains the image brightness of the partition image corresponding to each backlight partition based on the weighted average of the brightness values of all pixels of the partition image corresponding to each backlight partition; then obtains the current gear position of the regional light control switch state from the UI module of the display device 200, and obtains the current signal source type of the display device 200 from the media player or underlying chip of the display device 200, and obtains the brightness mapping relationship corresponding to the interval of light intensity, the current gear position and the current signal source type; finally, according to the image brightness of the partition image corresponding to each backlight partition, queries the brightness mapping relationship corresponding to the interval of light intensity, the current gear position and the current signal source type, and obtains the current required brightness of the backlight source of each backlight partition.

[0173] The technical solution provided in this embodiment queries the brightness mapping relationship corresponding to the interval of light intensity, the current gear of the regional light control switch state and the current signal source type according to the image brightness of the partition image corresponding to each backlight partition, which is conducive to quickly and accurately obtaining the current required brightness of the backlight source of each backlight partition, thereby improving the efficiency and accuracy of determining the current required brightness of the backlight source of each backlight partition.

[0174] In some embodiments, as Figure 11 As shown, when the light sensing mode switch state of the display device 200 is on, after confirming that the display device 200 is in the light sensing mode and obtaining the light intensity of the environment in which the display device 200 is located, the controller 250 is further configured to:

[0175] Step S1101 : when the illumination intensity range of the environment in which the display device 200 is located is not within the preset brightness range, it is determined whether the state of the local light control switch of the display device 200 is on.

[0176] Step S1102 : when the local light control switch of the display device 200 is in the on state, obtaining the global PWM associated with the interval to which the current required brightness of the backlight source of each backlight partition and the illumination intensity belongs.

[0177] In step S1103 , the control power supply 290 adjusts the brightness of the backlight source of each backlight partition based on the current required brightness of the backlight source of each backlight partition and the global PWM associated with the interval to which the illumination intensity belongs.

[0178] The interval to which the light intensity of the environment in which the display device 200 is located is not within the preset brightness interval means that the interval to which the light intensity of the environment in which the display device 200 is located is within the medium brightness interval or the high brightness interval.

[0179] Among them, the current required brightness of the backlight source of each backlight partition is also obtained by querying the brightness mapping relationship corresponding to the light intensity interval, current gear and current signal source type through the image brightness of the partition image corresponding to each backlight partition.

[0180] The global PWM associated with the interval to which the light intensity belongs is also obtained by querying the association relationship between the interval to which the light intensity belongs and the global PWM according to the interval to which the light intensity belongs in the environment where the display device 200 is located.

[0181] Among them, adjusting the brightness of the backlight source of each backlight partition based on the global PWM associated with the interval to which the current required brightness of the backlight source of each backlight partition belongs and the light intensity means determining the final PWM of the backlight source of each backlight partition based on the global PWM associated with the interval to which the current required brightness of the backlight source of each backlight partition belongs and adjusting the brightness of the backlight source of each backlight partition according to the final PWM of the backlight source of each backlight partition.

[0182] Specifically, refer to Figure 2When the display device 200 is in the light-sensing mode, the controller 250 determines whether the illumination intensity interval of the environment in which the display device 200 is located is within the preset brightness interval. If not, the controller 250 obtains the regional light control switch state of the display device 200 from the UI module of the display device 200, and determines whether the regional light control switch state of the display device 200 is on. If so, the image to be displayed on the display 260 is divided according to the number of backlight partitions of the display device 200 to obtain a partition image corresponding to each backlight partition; then, the weighted average brightness value of all pixels of the partition image corresponding to each backlight partition is calculated, and the weighted average brightness value of all pixels of the partition image corresponding to each backlight partition is calculated according to the number of backlight partitions corresponding to each backlight partition. The weighted average of the brightness values of all pixels in the zone image is used to obtain the image brightness of the zone image corresponding to each backlight zone; then the current gear position of the zone light control switch state is obtained from the UI module of the display device 200, and the current signal source type of the display device 200 is obtained from the media player or underlying chip of the display device 200, and the brightness mapping relationship corresponding to the interval of light intensity, the current gear position and the current signal source type is obtained; then, according to the image brightness of the zone image corresponding to each backlight zone, the brightness mapping relationship corresponding to the interval of light intensity, the current gear position and the current signal source type is queried to obtain the current required brightness of the backlight source of each backlight zone. In addition, the controller 250 also queries the correlation between the illumination intensity interval and the global PWM according to the illumination intensity interval of the environment in which the display device 200 is located, and obtains the global PWM associated with the illumination intensity interval of the environment in which the display device 200 is located; then, according to the current required brightness of the backlight source of each backlight partition, the basic PWM corresponding to each backlight partition is determined. For example, if the current required brightness of the backlight source of a backlight partition is 153, then the basic PWM corresponding to the backlight source of the backlight partition is 153 / 255=0.6; wherein 255 refers to the maximum brightness value; then, according to the illumination intensity interval, the basic PWM corresponding to the backlight source of the backlight partition is determined. The global PWM associated with the intensity interval (for example, 0.8) is used to update the basic PWM corresponding to each backlight partition to obtain the target PWM corresponding to each backlight partition. For example, if the basic PWM corresponding to the backlight source of a certain backlight partition is 0.6, then the target PWM corresponding to the backlight partition is 0.6×0.8=0.48. Finally, the target PWM corresponding to each backlight partition is sent to the power supply 290, so that the power supply 290 adjusts the on-time ratio of the backlight source of each backlight partition based on the target PWM corresponding to each backlight partition, thereby adjusting the brightness of the backlight source of each backlight partition. For details, refer to Figure 6 .

[0183] The technical solution provided by this embodiment is that, when the interval to which the illumination intensity of the environment in which the display device is located is not within the preset brightness interval and the regional light control switch state of the display device is on, the control power supply adjusts the brightness of the backlight source of each backlight partition based on the current required brightness of the backlight source of each backlight partition and the global PWM associated with the interval to which the illumination intensity belongs. In this way, when adjusting the brightness of the backlight source of each backlight partition, the current required brightness of the backlight source of each backlight partition and the global PWM associated with the interval to which the illumination intensity belongs are comprehensively considered, which is conducive to optimizing the picture display effect of the display device when it is not in the preset brightness interval.

[0184] In some embodiments, as Figure 12 As shown, when the illumination intensity range of the environment in which the display device 200 is located is not within the preset brightness range, after determining whether the state of the local light control switch of the display device 200 is on, the controller 250 is further configured to:

[0185] Step S1201 : when the state of the regional light control switch of the display device 200 is off, obtaining a global PWM associated with the interval to which the light intensity belongs and a global PWM associated with the average brightness.

[0186] Step S1202 : When the average brightness is less than the preset average brightness, the control power supply 290 adjusts the brightness of the backlight source of each backlight partition based on the global PWM associated with the average brightness.

[0187] Step S1203 : When the average brightness is greater than or equal to the preset average brightness, the control power supply 290 adjusts the brightness of the backlight source of each backlight partition based on the global PWM associated with the interval to which the light intensity belongs.

[0188] Among them, the regional light control switch state of the display device 200 is off, indicating that the display device 200 cannot perform the regional light control function, that is, it cannot obtain the current required brightness of the backlight source of each backlight partition, and adjust the brightness of the backlight source of each backlight partition according to the current required brightness of the backlight source of each backlight partition.

[0189] The global PWM associated with the interval to which the light intensity belongs is obtained by querying the association relationship between the interval to which the light intensity belongs and the global PWM according to the interval to which the light intensity belongs in the environment where the display device 200 is located.

[0190] The global PWM associated with the average brightness is obtained by querying the association relationship between the average brightness and the global PWM through the average brightness of the image to be displayed on the display 260.

[0191] In which, when the light intensity interval of the environment in which the display device 200 is located is not within the preset brightness interval and the regional light control switch state of the display device 200 is in the off state, the power supply 290 adjusts the brightness of the backlight source of each backlight partition based on the global PWM associated with the average brightness or the global PWM associated with the light intensity interval.

[0192] Specifically, refer to Figure 2 When the display device 200 is in the light-sensing mode, the controller 250 determines whether the illumination intensity interval of the environment in which the display device 200 is located is within the preset brightness interval. If not, the controller 250 obtains the regional light control switch state of the display device 200 from the UI module of the display device 200, and determines whether the regional light control switch state of the display device 200 is on. If not, the controller 250 queries the correlation relationship between the average brightness and the global PWM based on the average brightness of the image to be displayed on the display 260, and obtains the global PWM associated with the average brightness of the image to be displayed on the display 260. The controller 250 also queries the correlation relationship between the illumination intensity interval and the global PWM based on the illumination intensity interval of the environment in which the display device 200 is located, and obtains the global PWM associated with the illumination intensity interval of the environment in which the display device 200 is located. Next, it is determined whether the average brightness of the image to be displayed on the display 260 is less than the preset average brightness. If so, the global PWM associated with the average brightness is sent to the power supply 290, so that the power supply 290 adjusts the on-time ratio of the backlight source of each backlight partition based on the global PWM associated with the average brightness, thereby adjusting the brightness of the backlight source of each backlight partition; if not, the global PWM associated with the interval to which the light intensity belongs is sent to the power supply 290, so that the power supply 290 adjusts the on-time ratio of the backlight source of each backlight partition based on the global PWM associated with the interval to which the light intensity belongs, thereby adjusting the brightness of the backlight source of each backlight partition. For details, refer to Figure 6 .

[0193] The technical solution provided by this embodiment is that, when the interval to which the illumination intensity of the environment in which the display device is located does not fall within the preset brightness interval and the state of the regional light control switch of the display device is in the off state, the control power supply adjusts the brightness of the backlight source of each backlight partition based on the global PWM associated with the average brightness of the image to be displayed or the global PWM associated with the interval to which the illumination intensity belongs. In this way, when adjusting the brightness of the backlight source of each backlight partition, the global PWM associated with the average brightness of the image to be displayed and the global PWM associated with the interval to which the illumination intensity of the environment in which the display device is located are comprehensively considered, which is conducive to optimizing the picture display effect of the display device when it is not in the preset brightness interval.

[0194] In some embodiments, as Figure 13 As shown, after obtaining the light sensing mode switch state of the display device 200, the controller 250 is further configured to:

[0195] Step S1301 : when the light-sensing mode switch state of the display device 200 is off, confirm that the display device 200 is in the non-light-sensing mode, and determine whether the regional light control switch state of the display device 200 is on.

[0196] Step S1302 : when the local light control switch of the display device 200 is in the on state, obtaining the global PWM associated with the non-light sensing mode and the current required brightness of the backlight source of each backlight partition.

[0197] In step S1303 , the control power supply 290 adjusts the brightness of the backlight source of each backlight partition based on the global PWM associated with the non-light sensing mode and the current required brightness of the backlight source of each backlight partition.

[0198] Among them, non-light-sensitive mode refers to Figure 6 The other modes shown specifically refer to bright light mode, soft light mode, dynamic frequency conversion mode, energy saving mode, etc.

[0199] Each non-light-sensing mode is associated with a global PWM, which is specifically obtained by querying the association relationship between the non-light-sensing mode and the global PWM.

[0200] The current required brightness of the backlight source for each backlight partition is obtained by querying the brightness mapping relationship between the illumination intensity interval and the current signal source type based on the image brightness of the partition image corresponding to each backlight partition. This brightness mapping relationship between the illumination intensity interval and the current signal source type represents the mapping relationship between the image brightness of the backlight partition and the required brightness of the backlight source.

[0201] Among them, adjusting the brightness of the backlight source of each backlight partition based on the global PWM associated with the non-light-sensitive mode and the current required brightness of the backlight source of each backlight partition means determining the final PWM of the backlight source of each backlight partition based on the global PWM associated with the non-light-sensitive mode and the current required brightness of the backlight source of each backlight partition, and adjusting the brightness of the backlight source of each backlight partition according to the final PWM of the backlight source of each backlight partition.

[0202] Specifically, refer to Figure 2, the controller 250 determines whether the light-sensing mode switch state of the display device 200 is on. If not, it is determined that the display device 200 is in a non-light-sensing mode (such as an energy-saving mode), and obtains the regional light control switch state of the display device 200 from the UI module of the display device 200. Then, it is determined whether the regional light control switch state of the display device 200 is on. If so, the image to be displayed on the display 260 is divided according to the number of backlight partitions of the display device 200 to obtain a partition image corresponding to each backlight partition; then, the weighted average of the brightness values of all pixels of the partition image corresponding to each backlight partition is calculated, and the weighted average of the brightness values of all pixels of the partition image corresponding to each backlight partition is calculated according to the weighted average of the brightness values of all pixels of the backlight partition. The weighted average of the brightness values of all pixels of the corresponding partition image is used to obtain the image brightness of the partition image corresponding to each backlight partition; then the current gear position of the regional light control switch state is obtained from the UI module of the display device 200, and the current signal source type (such as SDR, HDR) of the display device 200 is obtained from the media player or underlying chip of the display device 200, and the brightness mapping relationship corresponding to the current gear position and the current signal source type is obtained; then, according to the image brightness of the partition image corresponding to each backlight partition, the brightness mapping relationship corresponding to the current gear position and the current signal source type is queried to obtain the current required brightness of the backlight source of each backlight partition. In addition, the controller 250 also queries the association between the non-light-sensitive mode and the global PWM according to the non-light-sensitive mode, and obtains the global PWM associated with the non-light-sensitive mode; then, according to the current required brightness of the backlight source of each backlight partition, the basic PWM corresponding to each backlight partition is determined. For example, if the current required brightness of the backlight source of a backlight partition is 102, then the basic PWM corresponding to the backlight source of the backlight partition is 102 / 255=0.4; wherein 255 refers to the maximum brightness value; then, according to the global PWM associated with the non-light-sensitive mode (for example, 0.7), the basic PWM corresponding to each backlight partition is updated to obtain the target PWM corresponding to each backlight partition. For example, if the basic PWM corresponding to the backlight source of a backlight partition is 0.4, then the target PWM corresponding to the backlight partition is 0.4×0.7=0.28. Finally, the target PWM corresponding to each backlight partition is sent to the power supply 290, so that the power supply 290 adjusts the on-time ratio of the backlight source of each backlight partition based on the target PWM corresponding to each backlight partition, thereby adjusting the brightness of the backlight source of each backlight partition. For details, refer to Figure 6 .

[0203] The technical solution provided by this embodiment is that, when the display device is in the non-light-sensitive mode and the regional light control switch state of the display device is on, the control power supply adjusts the brightness of the backlight source of each backlight partition based on the global PWM associated with the non-light-sensitive mode and the current required brightness of the backlight source of each backlight partition; in this way, when adjusting the brightness of the backlight source of each backlight partition, the global PWM associated with the non-light-sensitive mode and the current required brightness of the backlight source of each backlight partition are comprehensively considered, which is conducive to optimizing the picture display effect of the display device in the non-light-sensitive mode.

[0204] In some embodiments, as Figure 14 As shown, when the light-sensing mode switch state of the display device 200 is in the off state, after confirming that the display device 200 is in the non-light-sensing mode and determining whether the regional light control switch state of the display device 200 is in the on state, the controller 250 is further configured to:

[0205] Step S1401 : when the local light control switch state of the display device 200 is off, obtaining a global PWM associated with a non-light-sensing mode and a global PWM associated with an average brightness.

[0206] Step S1402 : When the average brightness is less than the preset average brightness, the control power supply 290 adjusts the brightness of the backlight source of each backlight partition based on the global PWM associated with the average brightness.

[0207] Step S1403 : When the average brightness is greater than or equal to the preset average brightness, the control power supply 290 adjusts the brightness of the backlight source of each backlight partition based on the global PWM associated with the non-light-sensing mode.

[0208] The global PWM associated with the non-light-sensing mode is obtained by querying the association relationship between the non-light-sensing mode and the global PWM.

[0209] The global PWM associated with the average brightness of the image to be displayed on the display 260 is obtained by querying the association relationship between the average brightness and the global PWM based on the average brightness of the image to be displayed on the display 260 .

[0210] In which, when the display device 200 is in the non-light-sensitive mode and the regional light control switch state of the display device 200 is in the off state, the power supply 290 adjusts the brightness of the backlight source of each backlight partition based on the global PWM associated with the average brightness or the global PWM associated with the non-light-sensitive mode.

[0211] Specifically, refer to Figure 2The controller 250 determines whether the light-sensing mode switch state of the display device 200 is on. If not, it confirms that the display device 200 is in a non-light-sensing mode (such as an energy-saving mode), and obtains the regional light-control switch state of the display device 200 from the UI module of the display device 200. Then, it determines whether the regional light-control switch state of the display device 200 is on. If not, according to the non-light-sensing mode, it queries the association relationship between the non-light-sensing mode and the global PWM to obtain the global PWM associated with the non-light-sensing mode, and according to the average brightness of the image to be displayed on the display 260, it queries the association relationship between the average brightness and the global PWM to obtain the global PWM associated with the average brightness of the image to be displayed on the display 260. Next, it is determined whether the average brightness of the image to be displayed on the display 260 is less than the preset average brightness. If so, the global PWM associated with the average brightness is sent to the power supply 290, so that the power supply 290 adjusts the on-time ratio of the backlight source of each backlight partition based on the global PWM associated with the average brightness, thereby adjusting the brightness of the backlight source of each backlight partition; if not, the global PWM associated with the non-light-sensitive mode is sent to the power supply 290, so that the power supply 290 adjusts the on-time ratio of the backlight source of each backlight partition based on the global PWM associated with the non-light-sensitive mode, thereby adjusting the brightness of the backlight source of each backlight partition. For details, refer to Figure 6 .

[0212] The technical solution provided by this embodiment is that, when the display device is in the non-light-sensitive mode and the regional light control switch state of the display device is in the off state, the control power supply adjusts the brightness of the backlight source of each backlight partition based on the global PWM associated with the non-light-sensitive mode or the global PWM associated with the average brightness of the image to be displayed; in this way, when adjusting the brightness of the backlight source of each backlight partition, the global PWM associated with the non-light-sensitive mode and the global PWM associated with the average brightness of the image to be displayed are comprehensively considered, which is conducive to optimizing the picture display effect of the display device in the non-light-sensitive mode.

[0213] In some embodiments, as Figure 5 As shown, a backlight adjustment method is provided, which can be applied to Figure 1 The display device 200 shown; Figure 2 As shown, the display device 200 may include a display 260, a backlight assembly 280, a power supply 290, and a controller 250; the number of backlight partitions included in the backlight assembly 280 is less than a preset number, and each backlight partition includes at least one backlight source; the controller 250 is coupled to the display 260, the backlight assembly 280, and the power supply 290 respectively; the method may include the following steps:

[0214] Step S501 , obtaining the light sensing mode switch state of the display device 200 .

[0215] Step S502 : When the light-sensing mode switch state of the display device 200 is on, confirm that the display device 200 is in the light-sensing mode, and obtain the light intensity of the environment where the display device 200 is located.

[0216] Step S503 , when the illumination intensity of the environment in which the display device 200 is located is within a preset brightness range, obtain the average brightness of the image to be displayed on the display 260 ; the preset brightness range is used to represent the range from the lowest brightness to the preset brightness.

[0217] Step S504 : According to the relationship between the average brightness of the image to be displayed and the preset average brightness, a target global PWM is determined from the global PWM associated with the average brightness and the global PWM associated with the interval to which the light intensity belongs.

[0218] In step S505 , the control power supply 290 adjusts the brightness of the backlight source of each backlight partition based on the target global PWM.

[0219] It should be noted that for the specific implementation process of the above backlight adjustment method, please refer to Figure 2 The relevant embodiments of the display device 200 are not described in detail here.

[0220] The technical solution provided by this embodiment is for a display device with a number of backlight partitions less than a preset number. When the illumination intensity interval of the environment in which the display device is located is within the preset brightness interval, the brightness of the backlight source of each backlight partition is adjusted according to the global PWM associated with the average brightness of the image to be displayed on the display, or the global PWM associated with the illumination intensity interval. The global PWM associated with the average brightness of the image to be displayed is a PWM suitable for dark field display, which can adaptively reduce the backlight brightness of the display device based on the average brightness of the image to be displayed, thereby making the black screen of the display darker, without light leakage and whitening, thereby improving the display device in the environment. The picture display effect when the light is dim; in addition, the global PWM associated with the interval of light intensity can adaptively adjust the backlight brightness of the display device according to the light intensity of the environment in which the display device is located to adapt to the viewing environment in the dark field, thereby optimizing the picture display effect, and then improving the picture display effect of the display device when the ambient light is dim; in this way, when adjusting the brightness of the backlight source of each backlight partition, the global PWM associated with the average brightness of the image to be displayed and the global PWM associated with the interval of light intensity are comprehensively considered, which is conducive to optimizing the picture display effect in the dark field as a whole, thereby improving the picture display effect of display devices with fewer partitions when the ambient light is dim.

[0221] In some embodiments, the backlight adjustment method may further include the following steps:

[0222] When the average brightness of the image to be displayed is less than the preset average brightness, the smallest global PWM is screened out from the global PWM associated with the average brightness and the global PWM associated with the interval to which the light intensity belongs, and the smallest global PWM is confirmed as the target global PWM; when the average brightness of the image to be displayed is greater than or equal to the preset average brightness, the global PWM associated with the interval to which the light intensity belongs is confirmed as the target global PWM.

[0223] In some embodiments, the backlight adjustment method may further include the following steps:

[0224] Query the association between average brightness and global PWM to obtain the global PWM associated with the average brightness; query the association between the interval to which the light intensity belongs and the global PWM to obtain the global PWM associated with the interval to which the light intensity belongs.

[0225] In some embodiments, the backlight adjustment method may further include the following steps:

[0226] When the zone light control switch state of the display device is on, the current required brightness of the backlight source of each backlight partition is obtained; the control power supply adjusts the brightness of the backlight source of each backlight partition based on the target global PWM and the current required brightness of the backlight source of each backlight partition.

[0227] In some embodiments, the backlight adjustment method may further include the following steps:

[0228] The image to be displayed is divided and processed to obtain a partition image corresponding to each backlight partition; the image brightness of the partition image corresponding to each backlight partition is obtained, as well as the current gear position of the regional light control switch state and the current signal source type of the display device; according to the image brightness of the partition image corresponding to each backlight partition, the brightness mapping relationship corresponding to the interval of light intensity, the current gear position and the current signal source type is queried to obtain the current required brightness of the backlight source of each backlight partition; the brightness mapping relationship is used to represent the mapping relationship between the image brightness of the backlight partition and the required brightness of the backlight source.

[0229] In some embodiments, the backlight adjustment method may further include the following steps:

[0230] When the illumination intensity interval of the environment in which the display device is located is not within the preset brightness interval, determine whether the regional light control switch state of the display device is on; when the regional light control switch state of the display device is on, obtain the current required brightness of the backlight source of each backlight partition and the global PWM associated with the illumination intensity interval; control the power supply to adjust the brightness of the backlight source of each backlight partition based on the current required brightness of the backlight source of each backlight partition and the global PWM associated with the illumination intensity interval.

[0231] In some embodiments, the backlight adjustment method may further include the following steps:

[0232] When the zone light control switch state of the display device is off, the global PWM associated with the interval to which the light intensity belongs and the global PWM associated with the average brightness are obtained; when the average brightness is less than the preset average brightness, the control power supply adjusts the brightness of the backlight source of each backlight zone based on the global PWM associated with the average brightness; when the average brightness is greater than or equal to the preset average brightness, the control power supply adjusts the brightness of the backlight source of each backlight zone based on the global PWM associated with the interval to which the light intensity belongs.

[0233] In some embodiments, the backlight adjustment method may further include the following steps:

[0234] When the light-sensing mode switch state of the display device is off, confirm that the display device is in non-light-sensing mode, and determine whether the regional light-control switch state of the display device is on; when the regional light-control switch state of the display device is on, obtain the global PWM associated with the non-light-sensing mode and the current required brightness of the backlight source of each backlight partition; control the power supply based on the global PWM associated with the non-light-sensing mode and the current required brightness of the backlight source of each backlight partition, and adjust the brightness of the backlight source of each backlight partition.

[0235] In some embodiments, the backlight adjustment method may further include the following steps:

[0236] When the zone light control switch state of the display device is off, the global PWM associated with the non-light-sensitive mode and the global PWM associated with the average brightness are obtained; when the average brightness is less than the preset average brightness, the control power supply adjusts the brightness of the backlight source of each backlight zone based on the global PWM associated with the average brightness; when the average brightness is greater than or equal to the preset average brightness, the control power supply adjusts the brightness of the backlight source of each backlight zone based on the global PWM associated with the non-light-sensitive mode.

[0237] In some embodiments, as Figure 15 As shown, in order to more clearly describe the signaling interaction process between the modules of the display device, the present application also provides another backlight adjustment method, which may include the following steps:

[0238] Step 1: The LD module (i.e., regional light control module) determines the image brightness of each backlight partition image according to the image to be displayed on the display; and determines the current required brightness of each backlight partition, i.e., Local dimming data, according to the image brightness of the partition image of each backlight partition.

[0239] Among them, the LD module is a hardware module that can realize fine control of the backlight through the picture content. Different from traditional digital and analog dimming, regional light control can realize individual control of each light strip.

[0240] Step 2: The LD module sends the determined Localdimming data to the Kernel.

[0241] In step 3, the OD module (ie, dark field optimization module) calculates the associated global PWM, ie, Global PWM, according to the average brightness of the image to be displayed on the display.

[0242] Among them, the 0D module is a software module that can detect the average brightness value of the picture content. When the average brightness value is less than the threshold of the 0D module, the 0D function is triggered to reduce the backlight, thereby ensuring that the display device does not leak light or turn white when playing black pictures.

[0243] Step 4: The 0D module sends the calculated Global PWM to the Kernel.

[0244] In step 5, the middleware (ie, the ambient light control module) calculates the associated global PWM, ie, Global PWM, according to the interval of the light intensity of the environment in which the display device is located.

[0245] Among them, the middleware is a software module that can capture the light intensity of the environment in which the display device is located through the ambient light intensity sensor on the display device, and then automatically adjust the backlight brightness of the display device according to the light intensity.

[0246] Step 6: The middleware sends the calculated Global PWM to the Kernel.

[0247] Step 7: Kernel determines the final PWM according to the Localdimming data sent by the LD module, the Global PWM sent by the OD module, and the Global PWM sent by the middleware, and sends the final PWM to the MCU (Microcontroller Unit).

[0248] Among them, when there are both Localdimming data and Global PWM sent by the 0D module, or when there are both Localdimming data and Global PWM sent by the middleware, the Localdimming data is mainly used to determine the basic PWM of each backlight partition, and the Global PWM sent by the 0D module or the middleware is mainly used to update the basic PWM of each backlight partition to obtain the target PWM of each backlight partition, that is, the final PWM.

[0249] In step 8, the MCU sends the final PWM to the power supply, so that the power supply adjusts the brightness of the backlight source of each backlight partition of the display device based on the final PWM.

[0250] The technical solution provided in this embodiment optimizes the picture display effect of the display device when the ambient light is dark by changing the effectiveness logic of the 0D module, LD module and ambient light control module, so that the user cannot perceive the bright band in the dark field; at the same time, without increasing the hardware cost, the picture display effect of the display device when the ambient light is dark can be significantly optimized.

[0251] In some embodiments, in order to more clearly illustrate the backlight adjustment method provided by the embodiments of the present application, the backlight adjustment method is specifically described below using a specific embodiment. Figure 6 As shown, this application also provides a method for optimizing the display effect in dark scenes for Local Dimming (regional light control) models with fewer partitions. By changing the effectiveness logic of the 0D module, LD module and ambient light control module, the display effect of the display device in dark ambient light is optimized. Specifically, it includes the following contents:

[0252] In order to achieve a thin effect or to save costs, some models use a local dimming solution with fewer partitions. Local dimming has fewer partitions, resulting in a larger area controlled by each partition. When local dimming takes effect, the entire partition area corresponding to the bright position of the screen will become brighter, forming a bright cluster. This phenomenon is particularly obvious in a dark room. For example, when a local dimming model has fewer partitions, such as there is only one row of partitions, when local dimming takes effect, the entire column of the screen corresponding to the bright position of the screen will become brighter, such as the power-on logo, the logo is in the middle, and the other areas are black. You will see a bright band from top to bottom on the power-on logo in the middle. This phenomenon is particularly obvious when the ambient light is relatively dark. Based on this, the present application proposes a method for optimizing the display effect in dark fields for local dimming models with fewer partitions.

[0253] refer to Figure 6 The detailed process is as follows:

[0254] (1) When the ambient light sensor is off, the intensity of the ambient light cannot be detected. The functions of the LD module and the 0D module are mutually exclusive. That is, when LD is on, 0D cannot take effect; when LD is off, 0D can take effect.

[0255] (2) When the ambient light sensor is on and the LD is off, and the light intensity is in the low-brightness range, the environment in which the TV is located is judged to be dark. Then, the average brightness value of the TV's picture content is determined. If the average brightness value is lower than the threshold of the 0D module, the 0D function is triggered; the PWM set for the ambient light and the PWM to be set for the 0D are compared, and the smaller of the two PWM values is taken into effect. When the light intensity is in the medium-brightness range and the high-brightness range, the 0D PWM is processed first, and then the ambient light PWM is processed.

[0256] (3) When the ambient light sensor and LD are on, the ambient light intensity is divided into three intervals: high, medium, and low. The signal source is divided into two types: SDR and HDR. The LD gear is divided into three levels: high, medium, and low. There are a total of 18 scenes, and the LD parameters corresponding to each scene are defined. Among them, the LD parameter is an effect curve for all partitions in the current scene. According to the image brightness value of the partition image of different partitions, the LD parameter can be queried to obtain the required brightness value of the corresponding backlight partition.

[0257] (3.1) Adjust the LD gear and call the corresponding LD parameters according to the current ambient light intensity range and SDR / HDR signal.

[0258] (3.2) When the light sensor is turned on, get the current LD gear and call the setlocaldimmingpreview (set local dimming preview) interface to refresh the LD parameters.

[0259] (3.3) When the ambient light changes, the refreshed LD parameters are determined based on the ambient light intensity range, SDR / HDR, and LD gear.

[0260] (3.4) When in the low-brightness range, 0D is turned on. When the average brightness value of the image content is less than the 0D threshold, when it is triggered to enter 0D, the minimum value of the PWM associated with the range and the PWM of 0D is taken to set the backlight effect; when it is not in the low-brightness range, 0D is turned off.

[0261] The technical solution provided in this embodiment achieves the purpose of significantly optimizing the picture display effect of the display device when the ambient light is dim without increasing the hardware cost.

[0262] It should be understood that, although the various steps in the flowcharts involved in the various embodiments described above are displayed in sequence according to the instructions of the arrows, these steps are not necessarily executed in sequence in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order restriction on the execution of these steps, and these steps can be executed in other orders. Moreover, at least a portion of the steps in the flowcharts involved in the various embodiments described above can include multiple steps or multiple stages, and these steps or stages are not necessarily executed and completed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a portion of steps or stages in other steps.

[0263] Based on the same inventive concept, embodiments of the present application further provide a backlight adjustment device for implementing the aforementioned backlight adjustment method. The solution provided by this device is similar to the solution described in the aforementioned method. Therefore, the specific limitations of one or more of the following embodiments of the backlight adjustment device can be found in the aforementioned limitations of the backlight adjustment method and will not be further elaborated here.

[0264] In some embodiments, as Figure 16 As shown, a backlight adjustment device 1600 is provided, which can be applied to Figure 1 The display device 200 shown; Figure 2 As shown, the display device 200 may include a display 260, a backlight assembly 280, a power supply 290, and a controller 250; the number of backlight partitions included in the backlight assembly 290 is less than a preset number, and each backlight partition includes at least one backlight source; the controller 250 is coupled to the display 260, the backlight assembly 280, and the power supply 290 respectively; the device may include:

[0265] The state acquisition module 1610 is used to obtain the light sensing mode switch state of the display device.

[0266] The intensity acquisition module 1620 is configured to confirm that the display device is in the light-sensing mode when the light-sensing mode switch of the display device is in the on state, and to acquire the light intensity of the environment in which the display device is located.

[0267] The brightness acquisition module 1630 is used to obtain the average brightness of the image to be displayed on the display when the illumination intensity interval of the environment in which the display device is located is within a preset brightness interval; the preset brightness interval is used to represent the interval from the lowest brightness to the preset brightness.

[0268] The PWM determination module 1640 is configured to determine a target global PWM from the global PWM associated with the average brightness and the global PWM associated with the interval to which the illumination intensity belongs, according to the relationship between the average brightness of the image to be displayed and the preset average brightness.

[0269] The brightness adjustment module 1650 is configured to control the power supply to adjust the brightness of the backlight source of each backlight partition based on the target global PWM.

[0270] Each module in the backlight adjustment device described above can be implemented in whole or in part through software, hardware, or a combination thereof. Each module can be embedded in or independent of a processor in a computer device in the form of hardware, or can be stored in a memory in the computer device in the form of software, so that the processor can call and execute the corresponding operations of each module.

[0271] In some embodiments, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the steps in the above-mentioned method embodiments are implemented.

[0272] In some embodiments, a computer program product is provided, including a computer program, which implements the steps in the above method embodiments when executed by a processor.

[0273] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of relevant data must comply with relevant regulations.

[0274] Those skilled in the art will appreciate that all or part of the processes in the above-mentioned embodiment methods can be implemented by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, database or other media used in the embodiments provided in this application may include at least one of non-volatile memory and volatile memory. Non-volatile memory may include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory may include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in the various embodiments provided herein may include at least one of a relational database and a non-relational database. Non-relational databases may include, but are not limited to, distributed databases based on blockchains. The processor involved in the various embodiments provided herein may be, but are not limited to, a general-purpose processor, a central processing unit (CPU), a graphics processing unit (GPU), a digital signal processor (DSP), a programmable logic unit (PLC), a data processing logic unit based on quantum computing, an artificial intelligence (AI) processor, and the like.

[0275] The technical features of the above embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this application.

[0276] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present application shall be determined by the appended claims.

Claims

1. A display device, characterized in that: include: monitor; Backlight assembly; The number of backlight partitions included in the backlight assembly is less than a preset number, and each backlight partition includes at least one backlight source; power supply; a controller, coupled to the display, the backlight assembly, and the power supply, respectively, and configured to: Obtaining the light sensing mode switch status of the display device; When the light-sensing mode switch state of the display device is on, confirming that the display device is in the light-sensing mode, and obtaining the light intensity of the environment in which the display device is located; When the illumination intensity of the environment in which the display device is located falls within a preset brightness range, obtaining an average brightness of the image to be displayed on the display; The preset brightness range is used to represent the range from the lowest brightness to the preset brightness; Determining a target global PWM from a global PWM associated with the average brightness and a global PWM associated with the interval to which the light intensity belongs, according to a relationship between the average brightness of the image to be displayed and a preset average brightness; The power supply is controlled to adjust the brightness of the backlight source of each backlight partition based on the target global PWM.

2. The display device according to claim 1, wherein The controller performs the step of determining, based on the relationship between the average brightness of the image to be displayed and the preset average brightness, a target global PWM from the global PWM associated with the average brightness and the global PWM associated with the interval to which the light intensity belongs, and is specifically configured as follows: When the average brightness of the image to be displayed is less than the preset average brightness, screening out a minimum global PWM from the global PWM associated with the average brightness and the global PWM associated with the interval to which the illumination intensity belongs, and determining the minimum global PWM as the target global PWM; When the average brightness of the image to be displayed is greater than or equal to the preset average brightness, the global PWM associated with the interval to which the illumination intensity belongs is confirmed as the target global PWM.

3. The display device according to claim 1, wherein Before determining a target global PWM from the global PWM associated with the average brightness and the global PWM associated with the interval to which the illumination intensity belongs based on the relationship between the average brightness of the image to be displayed and the preset average brightness, the controller is further configured to: Querying the correlation between the average brightness and the global PWM to obtain the global PWM associated with the average brightness; The association relationship between the interval to which the light intensity belongs and the global PWM is queried to obtain the global PWM associated with the interval to which the light intensity belongs.

4. The display device according to claim 1, wherein The controller performs the step of controlling the power supply to adjust the brightness of the backlight source of each backlight partition based on the target global PWM, and is specifically configured as follows: When the regional light control switch state of the display device is on, obtaining the current required brightness of the backlight source of each backlight partition; The power supply is controlled to adjust the brightness of the backlight source of each backlight partition based on the target global PWM and the current required brightness of the backlight source of each backlight partition.

5. The display device according to claim 4, wherein: The controller performs the step of obtaining the currently required brightness of the backlight source of each backlight partition, and is specifically configured as follows: Performing division processing on the image to be displayed to obtain a partition image corresponding to each backlight partition; Obtaining the image brightness of the partition image corresponding to each backlight partition, and obtaining the current gear position of the regional light control switch state and the current signal source type of the display device; According to the image brightness of the partition image corresponding to each backlight partition, query the brightness mapping relationship corresponding to the illumination intensity interval, the current gear position, and the current signal source type to obtain the current required brightness of the backlight source of each backlight partition; The brightness mapping relationship is used to represent the mapping relationship between the image brightness of the backlight partition and the required brightness of the backlight source.

6. The display device according to any one of claims 1 to 5, characterized in that: When the light-sensing mode switch state of the display device is on, after confirming that the display device is in the light-sensing mode and obtaining the light intensity of the environment in which the display device is located, the controller is further configured to: When the illumination intensity range of the environment in which the display device is located is not within the preset brightness range, determining whether the state of the regional light control switch of the display device is on; When the regional light control switch state of the display device is on, obtaining the current required brightness of the backlight source of each backlight partition and the global PWM associated with the interval to which the light intensity belongs; The power supply is controlled to adjust the brightness of the backlight source of each backlight partition based on the current required brightness of the backlight source of each backlight partition and the global PWM associated with the interval to which the illumination intensity belongs.

7. The display device according to claim 6, wherein: When the illumination intensity range of the environment in which the display device is located is not within the preset brightness range, after determining whether the local light control switch state of the display device is on, the controller is further configured to: When the state of the regional light control switch of the display device is off, obtaining the global PWM associated with the interval to which the light intensity belongs and the global PWM associated with the average brightness; When the average brightness is less than the preset average brightness, controlling the power supply to adjust the brightness of the backlight source of each backlight partition based on the global PWM associated with the average brightness; When the average brightness is greater than or equal to the preset average brightness, the power supply is controlled to adjust the brightness of the backlight source of each backlight partition based on the global PWM associated with the interval to which the light intensity belongs.

8. The display device according to any one of claims 1 to 5, characterized in that: After obtaining the light sensing mode switch state of the display device, the controller is further configured to: When the light-sensing mode switch state of the display device is off, confirming that the display device is in a non-light-sensing mode, and determining whether the regional light control switch state of the display device is on; When the local light control switch state of the display device is on, obtaining the global PWM associated with the non-light sensing mode and the current required brightness of the backlight source of each backlight partition; The power supply is controlled to adjust the brightness of the backlight source of each backlight partition based on the global PWM associated with the non-light sensing mode and the current required brightness of the backlight source of each backlight partition.

9. The display device according to claim 8, wherein When the light-sensing mode switch state of the display device is in the off state, after confirming that the display device is in the non-light-sensing mode and determining whether the regional light control switch state of the display device is in the on state, the controller is further configured to: When the local light control switch state of the display device is off, obtaining the global PWM associated with the non-light sensing mode and the global PWM associated with the average brightness; When the average brightness is less than the preset average brightness, controlling the power supply to adjust the brightness of the backlight source of each backlight partition based on the global PWM associated with the average brightness; When the average brightness is greater than or equal to the preset average brightness, the power supply is controlled to adjust the brightness of the backlight source of each backlight partition based on the global PWM associated with the non-light sensing mode.

10. A backlight adjustment method, applied to a display device, the display device comprising a display, a backlight assembly, a power supply, and a controller; the backlight assembly comprises fewer than a preset number of backlight subareas, each of which comprises at least one backlight source; The controller is coupled to the display, the backlight assembly and the power supply respectively; The method comprises: Obtaining the light sensing mode switch status of the display device; When the light-sensing mode switch state of the display device is on, confirming that the display device is in the light-sensing mode, and obtaining the light intensity of the environment in which the display device is located; When the illumination intensity of the environment in which the display device is located falls within a preset brightness range, obtaining the average brightness of the image to be displayed on the display; the preset brightness range is used to represent the range from the lowest brightness to the preset brightness; Determining a target global PWM from a global PWM associated with the average brightness and a global PWM associated with the interval to which the light intensity belongs, according to a relationship between the average brightness of the image to be displayed and a preset average brightness; The power supply is controlled to adjust the brightness of the backlight source of each backlight partition based on the target global PWM.

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