WO2022170765A1

WO2022170765A1 - Display device and backlight control method

Info

Publication number: WO2022170765A1
Application number: PCT/CN2021/119693
Authority: WO
Inventors: 刁玉洁; 王烨东; 沈海杰
Original assignee: 海信视像科技股份有限公司
Priority date: 2021-02-09
Filing date: 2021-09-22
Publication date: 2022-08-18
Also published as: CN112951168A

Abstract

Embodiments of the present application provide a display device and a backlight control method, relate to the technical field of displays, are capable of eliminating the phenomenon of flickering in a display device, and enhance user experience. The method comprises: predicting a first backlight partition and a second backlight partition on the basis of the trajectory of motion of a target image; the first backlight partition being a backlight partition in which the target image is located in a current frame, the second backlight partition being a backlight partition in which the target image is located in a target frame; when the difference between the brightness of the first backlight partition in the current frame and the brightness of the second backlight partition in the target frame is greater than or equal to a set value, determining a backlight value for the second backlight partition on the basis of a first image, the first image being the target image or a partial image of the target image located in the second backlight partition in the target frame; and adjusting the brightness of the second backlight partition on the basis of the backlight value for the second backlight partition. The present application is for use in eliminating the phenomenon of flickering of the display device.

Description

Display device and backlight control method

Cross-reference to related applications

This application claims the priority of the Chinese patent application with the application number 202110175271.0 and the application title "Display Device and Backlight Control Method" filed with the China Patent Office on February 09, 2021, the entire contents of which are incorporated into this application by reference.

technical field

The present application relates to the field of display technology, and in particular, to a display device and a backlight control method.

Background technique

At present, some display devices such as LCD TVs include multiple backlight partitions. Such display devices use local dimming technology to compensate the brightness of the display screen. In this type of display device including multiple backlight partitions, since each backlight partition can be independently controlled, not only the power consumption of the display device can be reduced, but also the contrast ratio of the display screen of the display device can be improved, and the user experience can be improved.

With the development of technology, the number of backlight partitions of multi-partition display devices is increasing. Due to the large number of partitions, the backlight area controlled by each partition is relatively small. When the above-mentioned display device is used for screen display, some sports scenes There is a problem of screen flickering in the display, which affects the user experience.

SUMMARY OF THE INVENTION

Embodiments of the present application provide a display device and a backlight control method, which can eliminate the flicker phenomenon in the display device and improve user experience.

To achieve the above object, the embodiments of the present application adopt the following technical solutions:

In a first aspect, a display device is provided, including a display and a controller.

Wherein, the display is configured to: display the user interface.

The controller is configured as:

The first backlight partition and the second backlight partition are predicted according to the motion trajectory of the target image; the first backlight partition is the backlight partition where the target image is located in the current frame, and the second backlight partition is the backlight partition where the target image is located in the target frame;

When the difference between the brightness of the current frame of the first backlight partition and the brightness of the second backlight partition of the target frame is greater than or equal to the set value, the backlight value of the second backlight partition is determined according to the first image; when the first image is the target frame, it is located at The target image of the second backlight partition or a partial image of the target image;

The brightness of the second backlight partition is adjusted according to the backlight value of the second backlight partition.

In a second aspect, a backlight control method is provided, which is applied to the display device provided in the first aspect, and the method includes:

In a third aspect, a display device is provided, including:

A display is used to display a screen.

Controller, the controller is configured as:

When controlling the display to display the current frame, the backlight value corresponding to the target frame is used as the backlight value of the current frame to adjust the backlight, and the target frame is the next P frame of the current frame.

The display device provided by the embodiment of the present application predicts the backlight partition to which the target image may move, such as the second backlight partition, according to the motion trajectory of the target image displayed in the display; When a backlight partition moves to the second backlight partition, determine the brightness difference between the first backlight partition and the second backlight partition; if the brightness difference is greater than the set value, it can be determined when the target image moves to the second backlight partition Flickering phenomenon may occur, at this time, the display device can predict the movement of the target image to the first image of the second backlight partition through the controller, and determine the backlight value of the second backlight partition according to the first grayscale distribution of the first image; When the target image has not actually moved to the second backlight partition, the backlight value of the second backlight partition determined by the controller is pre-calculated. Therefore, the brightness of the second backlight partition can be adjusted in advance according to the backlight value. The flickering phenomenon caused by the delay of the change of the brightness of the second backlight partition with the change of the target image is avoided, and the user experience is improved.

Description of drawings

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 accompanying drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only These are some embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without any creative effort.

FIG. 1 is a schematic diagram of an operation scenario between a display device and a control device according to an embodiment of the present application;

2 is a schematic diagram of an example when a flicker phenomenon exists in a display device provided by an embodiment of the present application;

FIG. 3 is one of the schematic flowcharts of a backlight control method provided by an embodiment of the present application;

4 is a schematic diagram of a backlight partition of a display device according to an embodiment of the present application;

5(a) is a schematic diagram of a backlight partition currently occupied by a target image according to an embodiment of the present application;

FIG. 5(b) is a schematic diagram of a backlight partition that is predicted to be occupied by a target image according to an embodiment of the present application;

FIG. 5(c) is a schematic diagram of another backlight partition occupied by target image prediction provided by an embodiment of the present application;

FIG. 6 is a schematic diagram of division of a target image according to an embodiment of the present application;

FIG. 7 is a schematic diagram of another backlight partition occupied by target image prediction provided by an embodiment of the present application;

FIG. 8 is the second schematic flowchart of a backlight control method provided by an embodiment of the present application;

FIG. 9 is a grayscale histogram of a first image provided by an embodiment of the present application;

FIG. 10 is a third schematic flowchart of a backlight control method provided by an embodiment of the present application;

FIG. 11 is a fourth schematic flowchart of a backlight control method provided by an embodiment of the present application.

Detailed ways

In order to make the objectives, implementations and advantages of the present application clearer, the exemplary embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings in the exemplary embodiments of the present application. Obviously, the exemplary embodiments described It is only a part of the embodiments of the present application, but not all of the embodiments.

Based on the exemplary embodiments described in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the appended claims of this application. Furthermore, although the disclosures in this application have been presented in terms of illustrative example or instances, it should be understood that various aspects of this disclosure may also constitute a complete embodiment in isolation.

It should be noted that the brief description of the terms in the present application is only for the convenience of understanding the embodiments described below, rather than intended to limit the embodiments of the present application. Unless otherwise specified, these terms are to be understood according to their ordinary and ordinary meanings.

The terms "first", "second", "third", etc. in the description and claims of this application and the above drawings are used to distinguish similar or similar objects or entities, and are not necessarily meant to limit specific Order or precedence unless otherwise indicated. It should be understood that the terms so used are interchangeable under appropriate circumstances, eg, can be implemented in an order other than those given in the illustration or description of the embodiments of the present application.

Furthermore, the terms "comprising" and "having" and any variations thereof, are intended to cover but not exclusively include, for example, a product or device incorporating a series of components is not necessarily limited to those explicitly listed, but may include No other components are expressly listed or inherent to these products or devices.

The term "module" as used in this application refers to any known or later developed hardware, software, firmware, artificial intelligence, fuzzy logic or combination of hardware or/and software code capable of performing the function associated with that element.

As used in this application, the term "remote control" refers to a component of an electronic device, such as the display device disclosed in this application, that can wirelessly control the electronic device, usually over a short distance. Generally, infrared and/or radio frequency (RF) signals and/or Bluetooth are used to connect with electronic devices, and functional modules such as WiFi, wireless universal serial bus (USB), Bluetooth, and motion sensors may also be included. For example, a hand-held touch remote control replaces most of the physical built-in hard keys in a general remote control device with a user interface in a touch screen.

FIG. 1 exemplarily shows a schematic diagram of an operation scenario between a display device and a control apparatus according to an embodiment. As shown in FIG. 1 , a user may operate the display apparatus 200 through the mobile terminal 300 and the control apparatus 100 .

In some embodiments, the control device 100 may be a remote control, and the communication between the remote control and the display device 200 includes infrared protocol communication or Bluetooth protocol communication, and other short-range communication methods, etc., and the display device 200 is controlled by wireless or other wired methods. . The user can control the display device 200 by inputting user instructions through keys on the remote control, voice input, control panel input, and the like. For example, the user can control the display device by inputting corresponding control commands through the volume plus and minus keys, channel control keys, up/down/left/right movement keys, voice input keys, menu keys, and power-on/off keys on the remote control. 200 functions.

In some embodiments, mobile terminals, tablet computers, computers, notebook computers, and other smart devices may also be used to control the display device 200 . For example, the display device 200 is controlled using an application running on the smart device. The application can be configured to provide users with various controls in an intuitive user interface (UI) on the screen associated with the smart device.

In some embodiments, the mobile terminal 300 may install a software application with the display device 200 to implement connection communication through a network communication protocol, so as to achieve the purpose of one-to-one control operation and data communication. For example, the mobile terminal 300 and the display device 200 can be used to establish a control command protocol, the remote control keyboard can be synchronized to the mobile terminal 300, and the user interface on the mobile terminal 300 can be controlled to realize the function of controlling the display device 200; The audio and video content displayed on the terminal 300 is transmitted to the display device 200 to realize a synchronous display function.

As also shown in FIG. 1 , the display device 200 also performs data communication with the server 400 through various communication methods. The display device 200 may be allowed to communicate via local area network (LAN), wireless local area network (WLAN), and other networks. The server 400 may provide various contents and interactions to the display device 200 . Illustratively, the display device 200 interacts with an electronic program guide (EPG) by sending and receiving information, receiving software program updates, or accessing a remotely stored digital media library. The server 400 may be a cluster or multiple clusters, and may include one or more types of servers. Other network service contents such as video-on-demand and advertising services are provided through the server 400 .

The display device 200 may be a liquid crystal display, an organic light-emitting diode (organic light-emitting diode, OLED) display, or a projection display device. The specific display device type, size and resolution are not limited. Those skilled in the art can understand that the display device 200 can make some changes in performance and configuration as required.

In addition to providing the function of broadcasting and receiving TV, the display device 200 may additionally provide the function of intelligent network TV with computer support function, including but not limited to, network TV, smart TV, Internet protocol television (IPTV) and the like.

In the related art, in order to improve the display quality, display layering and contrast of the picture of the display device, the backlight source usually adopts the method of dynamic backlight control. The specific implementation process is that the backlight module of the backlight source is divided into a plurality of backlight partitions, and the brightness of each backlight partition is controlled according to the image information of each backlight partition.

When a multi-partition display device is used for display, when the brightness of the image corresponding to the backlight partition changes, the backlight of the backlight partition will also change accordingly. frame delay. With the development of technology, the number of backlight partitions in multi-partition display devices is increasing, especially when sub-millimeter LEDs (Mini LEDs) are used as backlight sources, backlight products can achieve ultra-multi-partition fine control. In such a display device, the halo is highly convergent.

Due to the large number of backlight partitions, and the backlight area controlled by each backlight partition is relatively small, when the above-mentioned display device is used to display a picture, when there is a significant difference in the grayscale of the image content between adjacent blocks in the picture, and When the positions of two adjacent blocks are constantly changing (that is, the image in one backlight sub-region enters another backlight sub-region), flickering phenomenon will occur in the adjacent regions due to the delay and the large brightness variation range. Specifically, when a moving picture is displayed, such as when a small white ball moves back and forth against a black background as shown in FIG. 2 , especially a scene with a large grayscale difference between the moving object and the background. In some embodiments of the present application: when there are black and white intersecting objects moving in the picture, and the boundary where the moving object is located is between different backlight partitions, that is, when the white picture and the black background are at the junction of two adjacent backlight partitions During motion, the white screen image becomes brighter first, but the backlight still displays the backlight with a black background due to the delay, that is, the brightness of the image corresponding to the backlight partition is higher, and the brightness of the backlight partition is darker, resulting in the subjective feeling of flickering in the border area. In practical applications, there are a large number of black and white cross motion scenes, and there will be a problem of screen flickering.

When the image in the display moves, and the image is located in different partitions, since the grayscale between the different partitions is constantly changing, the backlight corresponding to the backlight partition also changes accordingly. Since there is a certain delay between the backlight of the backlight partition and the grayscale change of the image, when the image moves between different backlight partitions, the image may become bright first, and the backlight corresponding to the backlight partition will delay for a certain period of time. When it becomes brighter, it will cause flickering between different partitions and affect the user experience.

Aiming at the flickering phenomenon of the above-mentioned display device, an embodiment of the present application provides a backlight control method. By predicting the motion trajectory of an image in the display, and combining with the grayscale partition of the image, the backlight of the target backlight partition is controlled in advance, so that the target backlight can be controlled in advance. The brightness of the partition is adapted to the brightness of the image, so as to avoid the flicker phenomenon caused by the backlight change delay of the target backlight partition, and improve the user's visual experience. The target backlight partition here refers to the backlight partition to which the image will move from the current backlight partition.

Since the user can clearly perceive the flickering phenomenon of the display device when displaying some moving scene pictures, the backlight control method provided by the present application is suitable for the display device to display the moving scene pictures. Therefore, before the display device implements the process of the backlight control method provided in this embodiment, it is also necessary to determine whether the image displayed in the display device is a moving image. The backlight control method provided in the example eliminates possible flickering. Here, the moving image in the display device may be determined according to the moving target detection algorithm, or the moving image in the display device may be determined according to other algorithms, which is not limited in this embodiment.

The backlight control method provided by the embodiments of the present application is applied to a display device, and the display device includes a display and a controller. Wherein, the display is configured to: display the user interface. As shown in Figure 3, the controller is configured to perform the following steps:

S101. Predict the first backlight partition and the second backlight partition according to the motion trajectory of the target image.

The first backlight partition is the backlight partition where the target image is located in the current frame, the second backlight partition is the backlight partition where the target image is located in the target frame, and the second backlight partition is adjacent to the first backlight partition. The target frame here may be the next frame of the current frame, or may be another frame after the current frame, such as the third frame after the current frame.

Specifically, the display device in the embodiments of the present application may be terminal devices such as smart TVs and smart phones. In some embodiments of the present application, the display device in the present application may be the display device 200 shown in FIG. 1 . According to different display devices, the backlight module of its display backlight source can be divided into multiple backlight partitions, and the backlight values of these backlight partitions can be dynamically controlled to reduce the power consumption of the display device. In some embodiments of the present application, when the display device is a 45-inch smart TV, the backlight partitions can be 100; when the display device is a 65-inch smart TV, the backlight partitions can be 200; of course, in the display device When it is a smartphone, its backlight partition can also be divided into different numbers of backlight partitions according to the screen size.

When the target image is displayed on the display of the display device, the target image can be static or dynamically moving; when the target image is moving dynamically, the controller can predict the possible backlight partitions that it may reach according to the motion trajectory of the target image , that is, the second backlight partition. When the target image moves, it may completely move out of the first backlight partition in the target frame, or only part of the image may move out of the first backlight partition, so the backlight partition where the target image is located in the target frame not only includes the second backlight partition , and may also include a first backlight partition.

Exemplarily, as shown in FIG. 4 , a schematic diagram of a backlight partition of a display device is provided, and a target image may occupy any one backlight partition or multiple backlight partitions. As shown in FIG. 5( a ), a schematic diagram of the backlight partition occupied by the target image in the current frame is provided. At this time, the backlight partition occupied by the target image is the first backlight partition, and the first backlight partition is not limited to one backlight partition. In some embodiments of the present application, the first backlight partition may include a first backlight partition 1, a first backlight partition 2, a first backlight partition 3, and a first backlight partition 4; of course, the actual first backlight occupied by the target image Partitions can also include more.

As shown in FIG. 5(b), a schematic diagram of the predicted backlight partition of the target image is provided, and the figure is used to indicate the backlight partition that the target image predicted by the controller according to the motion trajectory of the target image may be occupied by dynamic motion. At this time, the target image The occupied backlight partitions may include a first backlight partition and a second backlight partition. In some embodiments of the present application, the backlight partitions occupied by the target image at this time may include the first backlight partition 1, the first backlight partition 2, the first backlight partition 3, the first backlight partition 4, the second backlight partition 1, and the first backlight partition 1. Two backlight partition 2. The first target image in FIG. 5( b ) is the current position of the target image, and the second target image is the possible position of the target image predicted according to the motion trajectory of the target image.

In some embodiments, when the target image is in dynamic motion, its motion range may only be within the first backlight partition, as shown in FIG. 5( c ), and a schematic diagram of the predicted backlight partition of the target image is also provided. Still only the first backlight partition is occupied, but the second backlight partition is not occupied. The first target image in Fig. 5(c) is the current position of the target image, the second target image is the possible position of the target image predicted according to the motion trajectory of the target image, and the target image occupies the first backlight before and after the movement The partition 1, the first backlight partition 2, the first backlight partition 3, and the first backlight partition 4 do not occupy a new second backlight partition.

It should be noted that the display device in this application refers to a multi-partition display device. In this embodiment, the first backlight partition still occupied by the target image after the movement can also be referred to as the second backlight partition. The first backlight partition 1 can be called the second backlight partition; another example is that the target image occupies the first backlight partition 1, the first backlight partition 2, the first backlight partition 3 and the first backlight partition 4 before the movement, and still occupies the first backlight partition after the movement. a backlight partition 1, a first backlight partition 2, a first backlight partition 3, and a first backlight partition 4, then the first backlight partition 1, the first backlight partition 2, the first backlight partition 3, the first backlight partition 4 are referred to as the second backlight partition 1, the second backlight partition 2, the second backlight partition 3, and the second backlight partition 4, respectively.

S102: When the difference between the brightness of the first backlight subregion and the brightness of the second backlight subregion in the target frame is greater than or equal to a set value, determine the backlight value of the second backlight subregion according to the first image.

Wherein, the first image is a target image or a partial image of the target image located in the second backlight partition in the target frame.

Specifically, the set value here can be determined by those skilled in the art according to experiments. When the brightness difference between the first backlight sub-region and the second backlight sub-region is greater than or equal to the set value, the target image is between the two backlight sub-regions. movement may have flickering.

Since both the first backlight sub-region and the second backlight sub-region can include multiple ones, when determining the luminance difference between the first backlight sub-region and the second backlight sub-region, it is necessary to determine the first backlight sub-region and the corresponding second backlight sub-region respectively. The difference in brightness between. It should be noted that there is a correspondence between the first backlight partition and the second backlight partition. For example, the first backlight partition 1 is adjacent to the second backlight partition 1, and the target image is from the first backlight partition 1 to the second backlight partition. 1 movement, it can be determined that the first backlight partition 1 corresponds to the second backlight partition 1; if the second backlight partition 2 is not adjacent to the first backlight partition 1, but is adjacent to the first backlight partition 2, and the target image is If the first backlight sub-region 2 moves toward the second backlight sub-region 2 , it can be determined that the first backlight sub-region 2 corresponds to the second backlight sub-region 2 .

Exemplarily, if the target image is located in the first backlight partition in the current frame, and is located in the second backlight partition in the target frame, if the difference between the brightness of the second backlight partition and the brightness of the first backlight partition is greater than or equal to the set value, Then, flickering may occur when the target image moves to the second backlight partition; at this time, the backlight value of the second backlight partition in the target frame needs to be determined according to the target image, so as to adjust the brightness of the second backlight partition in advance to avoid flickering. Phenomenon.

In some embodiments, after it is determined that the difference between the brightness of the first backlight partition in the current frame and the brightness of the second backlight partition in the target frame is greater than or equal to the set value, the backlight value of the second backlight partition is displayed according to the corresponding display of the partition. The screen information of the screen is determined.

The backlight value of the second backlight partition can be specifically determined through the following steps:

The backlight value of the second backlight partition in the target frame is determined according to the first grayscale distribution of the first image.

Wherein, the first grayscale distribution is used to indicate the number of each grayscale pixel in the first image.

Specifically, after it is determined that the luminance difference between the first backlight subregion and the second backlight subregion corresponding to the first backlight subregion is greater than or equal to the set value, it can be determined according to the first grayscale distribution of the first image The backlight value of the second backlight partition. The first image here is a part of the image in the target image that has been moved to the second backlight partition. In some embodiments of the present application, FIG. A schematic diagram of the predicted backlight partition is shown in FIG. 6 , where the target image can be divided into a first image and a second image, where the first image is the image occupying the second backlight partition. Here, the brightness of the first backlight partition and the brightness of the second backlight partition may be determined by the controller through the control module of the backlight source.

In some embodiments, when the target image completely moves out of the first backlight partition, the first image here may also be the target image. As shown in FIG. 7 , when the target image completely moves from the first backlight partition to the second backlight partition , the first image is the target image, and the first image is the second target image in FIG. 7 . The first target image in FIG. 7 is the current position of the target image, and the second target image is the possible position of the target image predicted according to the motion trajectory of the target image.

After the first image is determined, the backlight value of the second backlight partition can be calculated according to the first grayscale distribution corresponding to the first image, so that the second backlight partition can adjust its backlight brightness in advance according to the backlight value, so as to avoid adjusting the brightness of the second backlight partition. Second, the time delay of the brightness of the backlight partition to avoid flickering. The first grayscale distribution here refers to the number of grayscale pixels in the first image. For example, the first image includes 90 pixels with a grayscale of 233, and 80 pixels with a grayscale of 165. The number of pixels with a grayscale of 50 is 70, and so on.

In some embodiments, as shown in FIG. 5( c ), when the target image moves within the first backlight subregion, since the image portion of the target image in each first backlight subregion changes, each first backlight subregion includes: The grayscale of the pixel also changes, so the backlight value of each first backlight partition also needs to be adjusted here. At this time, the grayscale histogram of each first backlight partition needs to be determined, and the number of pixels in each grayscale level needs to be counted, so as to determine the backlight value of each first backlight partition. The specific process can refer to the above method, which is not repeated here. Repeat.

In some embodiments, when the brightness difference between the first backlight sub-region and the second backlight sub-region is smaller than the set value, the movement of the target image between the two backlight sub-regions will not cause flickering, but the The backlight values of the first backlight subregion and the second backlight subregion are adjusted to enhance the contrast between the target image and the first backlight subregion and the second backlight subregion, thereby improving the user's perception.

In some embodiments, when the difference between the brightness of the first backlight partition in the current frame and the brightness of the second backlight partition in the target frame is greater than or equal to a set value, as shown in FIG. 8 , step S102 may include:

S1021. Determine a first grayscale histogram of the first image.

S1022. Determine the first grayscale distribution of the first image according to the first grayscale histogram.

Specifically, the first grayscale distribution can be determined according to the grayscale histogram of the first image, and the number of pixels of each grayscale can be determined by performing statistics on the grayscale histogram of the first image. The grayscale histogram of the first image can be determined by the controller according to the prior art. For example, the controller can determine the grayscale histogram of the first image through OpenCV, or can be determined by other technical means commonly used in the art, which will not be repeated here. .

Exemplarily, the grayscale histogram of the first image may be as shown in FIG. 9 , the horizontal axis of the grayscale histogram represents the gray level of the pixels, and the vertical axis represents the corresponding number of pixels. The number of pixels of each gray level can be determined by the statistics of the gray histogram. For example, the number of pixels with a gray level of 233 is 90, the number of pixels with a gray level of 165 is 80, and the number of pixels with a gray level of 50 is 80. The number of pixels is 70 and so on.

In some embodiments, the first grayscale distribution here can also be determined by other methods, such as determining the grayscale of the corresponding pixel according to the RGB color components of each pixel in the second backlight partition, and then determining the grayscale of each grayscale pixel. number.

S1023: Determine the backlight value of the second backlight partition in the target frame according to the first grayscale distribution.

Specifically, in steps S1021-S1022, the first grayscale distribution of the first image, that is, the number of pixels of each grayscale level, may be determined through the grayscale histogram of the first image. The maximum value is determined as the backlight value of the second backlight partition, and N times the average value of the pixel grayscale of the first image can also be determined as the backlight value of the second backlight partition; The average value is weighted to determine the backlight value of the second backlight partition, which is not limited in this embodiment of the present application.

In some embodiments, those skilled in the art can also determine the backlight value of the second backlight partition through other backlight dynamic dimming algorithms, which will not be repeated here.

In some embodiments, the second backlight partition may include multiple ones. In some embodiments of the present application, as shown in FIG. 5( b ), the second backlight partition includes a second backlight partition 1 and a second backlight partition 2 , so The first image here may also include a plurality of first images 1 located in the second backlight partition 1 and first images 2 located in the second backlight partition 2 . Therefore, it is necessary to determine the grayscale distribution of the first image 1 and the first image 2 respectively, and determine the backlight value of the corresponding second backlight partition according to the grayscale distribution, such as according to the grayscale distribution of the first image 1. The backlight value of the second backlight partition 1 is determined, and the backlight value of the second backlight partition 2 is determined according to the grayscale distribution of the first image 2. The specific process can refer to the above step S1023, which will not be repeated here.

S103. Adjust the brightness of the second backlight subregion according to the backlight value of the second backlight subregion.

Specifically, after determining the backlight value of the second backlight subregion, the controller can adjust the brightness of the second backlight subregion according to the backlight value. It should be noted that, since the flickering phenomenon of the display device is caused by a certain time delay in the process that the controller controls the second backlight partition to adjust its brightness according to the corresponding backlight value, the controller controls the backlight of the second backlight partition here. The value adjustment is performed in advance, when the target image has not yet moved to the second backlight partition.

Exemplarily, if the controller controls the second backlight subregion to adjust its brightness according to the corresponding backlight value with a delay of three frames, the above target frame is the third frame after the current frame. At this time, the second backlight sub-regions occupied by the target image in the target frame and the corresponding backlight values of these second backlight sub-regions in the target frame can be determined according to the above-mentioned embodiment; and since the brightness of the second backlight sub-regions is adjusted according to the corresponding backlight values There is a time delay, so after determining the backlight value of the second backlight partition in the target frame, the brightness of the second backlight partition can be adjusted according to the backlight value at the beginning of the target frame; When the second backlight partitions are used, the brightness of these second backlight partitions is adapted to the grayscale of the corresponding image, thereby avoiding the flickering phenomenon.

In some embodiments, since the second backlight partition may include multiple, and the backlight values corresponding to each second backlight partition may be different, the brightness of each second backlight partition needs to be adjusted according to the backlight value corresponding to each second backlight partition. In some embodiments of the present application, step S1023 determines that the backlight value of the second backlight partition 1 is the first backlight value 1, and determines that the backlight value of the second backlight partition 2 is the first backlight value 2. The value 1 adjusts the brightness of the second backlight partition 1, and the brightness of the second backlight partition 2 is adjusted according to the first backlight value 2.

In some embodiments, as shown in FIG. 10, before step S101, the controller is further configured to perform the following steps:

S201. Determine a motion trajectory according to the frame pictures of the target image in the target time period.

Specifically, the motion trajectory of the target image can be determined according to the technical means commonly used in the art, for example, it can be determined according to the frame of the target image in the target time period combined with the machine learning model, and the machine learning model here can be the trained motion trajectory. The prediction model can predict the possible motion trajectory of the target image according to the frame of the target image. In some embodiments of the present application, the motion trajectory prediction model may collect M frames of the target image within the target time period, and predict the motion trajectory of the next frame according to the change trend of the M frames. The target time period may be M frames of motion of the target image before the current frame.

Of course, those skilled in the art can also determine the motion trajectory of the target image through other methods, and then determine whether the target image may move from the first backlight subregion to the second backlight subregion.

In some embodiments, the machine learning model here may be a neural network model, or may be other models, which are not limited in this embodiment of the present application.

In some embodiments, as shown in Figure 11, the controller is further configured to perform the following steps:

S301. According to the second grayscale histogram of the second image.

Wherein, the second image is a target image or a partial image of the target image located in the first backlight partition in the target frame.

S302. Determine the second grayscale distribution of the second image according to the second grayscale histogram.

Wherein, the second grayscale distribution is used to indicate the number of each grayscale pixel in the second image.

Specifically, the second image here is a partial image of the target image that is still located in the first backlight partition after the movement of the target image predicted according to the motion trajectory of the target image. Of course, when the target image moves inside the first backlight partition, the second image can also be target image. In some embodiments of the present application, the second image may be as shown in FIG. 6 , which is only a partial image of the target image; the second image may also be as shown in FIG. 5( c ), in which case the second image is the target image.

Similarly, the second grayscale distribution of the second image can also be determined according to its corresponding grayscale histogram, and the grayscale histogram of the second image can be counted to determine the distribution of each grayscale pixel in the second image. number. The grayscale histogram of the second image can be obtained according to the above method, and details are not repeated here.

S303. Determine the backlight value of the first backlight partition in the target frame according to the second grayscale distribution.

Specifically, in steps S301-S302, the second gray level distribution of the second image in the target frame may be determined by the gray level histogram of the second image, that is, the number of pixels of each gray level in the second image. Similarly, here, the maximum gray value of the pixels in the second image can be determined as the backlight value of the first backlight partition in the target frame, or N times the average grayscale value of the pixels in the second image can be determined as the first backlight partition. The backlight value in the target frame; of course, weighting can also be performed according to the grayscale maximum value and the grayscale average value to determine the backlight value of the first backlight partition in the target frame, which is not limited in this embodiment of the present application.

In some embodiments, those skilled in the art can also determine the backlight value of the first backlight partition by using other backlight dynamic dimming algorithms, which will not be repeated here.

In some embodiments, the first backlight partition may include multiple ones. In some embodiments of the present application, as shown in FIG. 5( b ), the first backlight partition includes a first backlight partition 1 , a first backlight partition 2 , and a A backlight partition 3 and a first backlight partition 4, so the second image here can also include multiple ones, that is, the second image 1 located in the first backlight partition 1, the second image 2 located in the first backlight partition 2, and the second image located in the first backlight partition 2. A second image 3 of a backlight partition 3 , and a second image 4 located in the first backlight partition 4 . Therefore, here it is necessary to determine the grayscale distribution of the second image 1, the second image 2, the second image 3 and the second image 4 respectively, and determine the backlight value of the corresponding first backlight partition according to these grayscale distributions, such as according to The grayscale distribution of the second image 1 determines the backlight value of the first backlight partition 1, and the backlight value of the first backlight partition 2 is determined according to the grayscale distribution of the second image 2. For the specific process, please refer to the above step S303. Repeat.

S304. Adjust the brightness of the first backlight subregion according to the backlight value of the first backlight subregion.

Specifically, after determining the backlight value of the first backlight partition, the controller can adjust the brightness of the first backlight partition in advance according to the backlight value. The specific process can refer to the adjustment method of the second backlight partition, which will not be repeated here. It should be noted that although the target image has not moved at this time, since there is a delay in adjusting the brightness of the first backlight partition according to the corresponding backlight value, the controller can adjust its brightness according to the corresponding backlight value in advance.

In some embodiments, since the first backlight partition may include multiple, and the backlight values corresponding to each first backlight partition may be different, the brightness of each first backlight partition needs to be adjusted according to the backlight value corresponding to each first backlight partition. In some embodiments of the present application, step S303 determines that the backlight value of the first backlight partition 1 is the second backlight value 1, and determines that the backlight value of the first backlight partition 2 is the second backlight value 2. The value 1 adjusts the brightness of the second backlight partition 1, and the brightness of the second backlight partition 2 is adjusted according to the second backlight value 2.

This embodiment not only adjusts the backlight value of the second backlight subregion in advance to avoid the flickering phenomenon of the second backlight subregion, but also can adjust the backlight value of the first backlight subregion in advance, so as to avoid the image in the first backlight subregion. Flickering phenomenon that may be caused by internal movement.

The backlight control method provided by the embodiment of the present application can predict the backlight partition to which the target image may move according to the movement trajectory of the target image in the display. When the backlight partition is used, determine the brightness difference between the first backlight partition and the second backlight partition; if the brightness difference is greater than the set value, it can be determined that flickering may occur when the target image moves to the second backlight partition. The display device can predict through the controller that the target image moves to the first image of the second backlight partition, and determine the backlight value of the second backlight partition according to the first grayscale distribution of the first image; because the target image has not actually moved at this time. To the second backlight partition, the backlight value of the second backlight partition determined by the controller here is pre-calculated, so here the brightness of the second backlight partition can be adjusted in advance according to the backlight value, so as to avoid the brightness of the second backlight partition. The brightness change is delayed from the flickering phenomenon caused by the target image change, thereby improving the user experience.

An embodiment of the present application provides a display device, which is used for executing the method process executed by the above-mentioned controller, so as to avoid the flicker phenomenon when an image moves in the display device. The display device includes a display and a controller.

Wherein, the display is configured to: display the user interface.

The controller is configured to: predict the first backlight partition and the second backlight partition according to the motion trajectory of the target image; the first backlight partition is the backlight partition where the target image is located in the current frame, and the second backlight partition is where the target image is located in the target frame. When the difference between the brightness of the first backlight partition in the current frame and the brightness of the second backlight partition in the target frame is greater than or equal to the set value, the backlight value of the second backlight partition is determined according to the first image; the first image is a target image or a partial image of the target image located in the second backlight subregion in the target frame; the brightness of the second backlight subregion is adjusted according to the backlight value of the second backlight subregion.

In some embodiments, the controller is further configured to: determine the motion trajectory according to the frame pictures of the target image within the target time period.

In some embodiments, the controller is specifically configured to: determine the backlight value of the second backlight partition in the target frame according to the first grayscale distribution of the first image; the first grayscale distribution is used to indicate each grayscale in the first image. The number of degree-level pixels.

In some embodiments, the controller is specifically configured to: determine a first grayscale histogram of the first image; determine a first grayscale distribution of the first image according to the first grayscale histogram; Determine the backlight value of the second backlight partition at the target frame.

In some embodiments, the controller is further configured to: according to a second grayscale histogram of the second image; the second image is a target image or a partial image of the target image whose target frame is located in the first backlight partition; according to the second grayscale The degree histogram determines the second grayscale distribution of the second image; the second grayscale distribution is used to indicate the number of each grayscale pixel in the second image; the first backlight partition is determined according to the second grayscale distribution. The backlight value of the target frame; the brightness of the first backlight partition is adjusted according to the backlight value of the first backlight partition.

The embodiment of the present application further provides a display device, which is used to adjust the brightness of the backlight partition occupied by the target image in the target frame in advance through the above embodiment, so as to avoid the flicker phenomenon. The display device includes a display and a controller.

Among them, the display, the display is used to display the picture;

Controller, the controller is configured as:

where P is less than or equal to 3. Of course, the time delay for adjusting the brightness according to the backlight partition, the P here can also be other values.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: The technical solutions described in the foregoing embodiments can still be modified, or some or all of the technical features thereof can be equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the embodiments of the present application. scope.

For the convenience of explanation, the above description has been made in conjunction with specific embodiments. However, the above exemplary discussions are not intended to be exhaustive or to limit implementations to the specific forms disclosed above. Numerous modifications and variations are possible in light of the above teachings. The above-described embodiments are chosen and described to better explain the principles and practical applications, so as to enable those skilled in the art to better utilize the described embodiments and various modified embodiments suitable for specific use considerations.

Claims

A display device, comprising:

monitor;

A controller that is configured to:

The first backlight partition and the second backlight partition are predicted according to the motion trajectory of the target image; the first backlight partition is the backlight partition where the target image is located in the current frame, and the second backlight partition is the target image in the target image. The backlight partition where the frame is located;

When the difference between the brightness of the first backlight partition and the brightness of the second backlight partition in the target frame is greater than or equal to a set value, the backlight of the second backlight partition is determined according to the first image. value; when the first image is the target frame, the target image or a partial image of the target image located in the second backlight partition;

The brightness of the second backlight partition is adjusted according to the backlight value of the second backlight partition.
The display device according to claim 1, wherein the controller is further configured to: determine the motion track according to the frame pictures of the target image within a target time period.
The display device according to claim 2, wherein the controller is specifically configured to: determine the backlight of the second backlight partition in the target frame according to the first grayscale distribution of the first image value; the first grayscale distribution is used to indicate the number of each grayscale pixel in the first image.
The display device according to claim 3, wherein the controller is specifically configured to:

determining a first grayscale histogram of the first image;

determining the first grayscale distribution of the first image according to the first grayscale histogram;

The backlight value of the second backlight partition in the target frame is determined according to the first grayscale distribution.
The display device according to claim 4, wherein the controller is further configured to:

According to the second grayscale histogram of the second image; the second image is the target image or a partial image of the target image located in the first backlight partition when the second image is the target frame;

Determine the second grayscale distribution of the second image according to the second grayscale histogram; the second grayscale distribution is used to indicate the number of each grayscale pixel in the second image;

The backlight value of the first backlight partition in the target frame is determined according to the second grayscale distribution.
The display device according to claim 5, wherein the controller is further configured to: adjust the brightness of the first backlight partition according to the backlight value of the first backlight partition.
A backlight control method, characterized in that, applied to a display device, the method comprising:

The first backlight partition and the second backlight partition are predicted according to the motion trajectory of the target image; the first backlight partition is the backlight partition where the target image is located in the current frame, and the second backlight partition is the target image in the target image. The backlight partition where the frame is located;

When the difference between the brightness of the first backlight partition and the brightness of the second backlight partition in the target frame is greater than or equal to a set value, the backlight of the second backlight partition is determined according to the first image. value; when the first image is the target frame, the target image or a partial image of the target image located in the second backlight partition;

The brightness of the second backlight partition is adjusted according to the backlight value of the second backlight partition.
The backlight control method according to claim 7, wherein before predicting the first backlight partition and the second backlight partition according to the motion trajectory of the target image, the method further comprises: according to the frames of the target image in the target time period The picture determines the motion trajectory.
The backlight control method according to claim 8, wherein the determining the backlight value of the second backlight partition in the target frame according to the first grayscale distribution of the first image comprises:

The backlight value of the second backlight partition is determined according to the first grayscale distribution of the first image; the first grayscale distribution is used to indicate the number of each grayscale pixel in the first image.
The backlight control method according to claim 9, wherein the determining the backlight value of the second backlight partition according to the first grayscale distribution of the first image comprises:

determining a first grayscale histogram of the first image;

determining the first grayscale distribution of the first image according to the first grayscale histogram;

The backlight value of the second backlight partition in the target frame is determined according to the first grayscale distribution.
A display device, characterized in that, comprising:

a display, which is used to display a picture;

A controller that is configured to:

When controlling the display to display the current frame image, the backlight value corresponding to the target frame is used as the backlight value of the current frame image to perform backlight adjustment, and the target frame is the next P frame image of the current frame.