CN113015006B

CN113015006B - Display apparatus and display method

Info

Publication number: CN113015006B
Application number: CN202011396269.8A
Authority: CN
Inventors: 沈海杰; 王烨东; 李广卿
Original assignee: Hisense Visual Technology Co Ltd
Current assignee: Hisense Visual Technology Co Ltd
Priority date: 2020-06-04
Filing date: 2020-12-03
Publication date: 2022-10-14
Anticipated expiration: 2040-12-03
Also published as: CN113015006A

Abstract

The embodiment of the application provides a display device and a display method, wherein the display device comprises a display and a controller, the controller is connected with the display, and the controller is configured to: acquiring the average brightness of an image to be displayed and a brightness histogram of the image to be displayed; if the sequence number of the first target interval is different from the sequence number of the second target interval, acquiring a first occupation ratio; according to the first ratio, correcting a contrast control curve of the image to be displayed; correcting the image to be displayed by using the contrast control curve to obtain a corrected image to be displayed; and controlling the display to display the corrected image to be displayed. The first proportion can represent the distribution condition of the brightness of the image to be displayed in a concentrated distribution mode or in a discrete distribution mode. Therefore, the contrast control curve of the image to be displayed can be corrected based on the first proportion, and then the contrast of the image to be displayed is corrected, so that the image to be displayed with different brightness distributions can obtain a better watching effect.

Description

Display apparatus and display method

The present application claims priority from chinese patent application having application number 202010498336.0, filed on 04/06/04/2020, the entire contents of which are incorporated herein by reference.

Technical Field

The application relates to the technical field of smart televisions, in particular to a display device and a display method.

Background

The intelligent television equipment has an independent operating system and supports function expansion. The user can install various application programs in the smart television according to the self requirement, for example, social application such as traditional video application and short video, and reading application programs such as cartoons and books. The applications can display application pictures by utilizing a screen of the intelligent television, and rich media resources are provided for the intelligent television. Meanwhile, the intelligent television can also perform data interaction and resource sharing with different terminals. For example, the smart television can be connected with a mobile phone through a local area network, bluetooth and other wireless communication modes, so as to play resources in the mobile phone or directly project a screen to display a picture on the mobile phone.

However, when the smart television device plays images, the contrast of the images is an important factor affecting the viewing effect of the user. In the prior art, in order to correct the contrast of an image and achieve the best viewing effect, a static contrast curve is usually used to correct the contrast of the image, or a histogram gain curve is used to correct the contrast of the image, or a combination of the static contrast curve and the histogram gain curve is used to correct the contrast of the image. However, because the brightness distribution of different images is different, the prior art adopts a static correction mode for different images, and is difficult to obtain a good viewing effect for the images with different brightness distributions.

Disclosure of Invention

The embodiment of the application provides display equipment and a display method, and aims to solve the problem that images with different brightness distributions cannot obtain a good viewing effect in the prior art.

In a first aspect, an embodiment of the present application provides a display device, including:

a display;

a controller connected to the display and configured to:

acquiring the average brightness of an image to be displayed and a brightness histogram of the image to be displayed;

if the sequence number of the first target interval is different from that of the second target interval, acquiring a first proportion; the first target interval is an interval where the average brightness in the brightness histogram is located, and the second target interval is an interval where the pixel point proportion in the brightness histogram is highest; the first occupation ratio is the occupation ratio of the pixel points in the first target interval and the sum of the occupation ratios of the pixel points in the interval which is away from the first target interval by a preset distance;

correcting a contrast control curve of the image to be displayed according to the first ratio;

correcting the image to be displayed by using the corrected contrast control curve to obtain a corrected image to be displayed;

and controlling the display to display the corrected image to be displayed.

In a second aspect, the present application provides a display method, including:

and correcting the image to be displayed by using the corrected contrast control curve to obtain a corrected image to be displayed.

According to the display device and the display method provided by the embodiment of the application, the first ratio can represent the distribution condition of the brightness of the image to be displayed in a centralized distribution manner or a discrete distribution manner. Therefore, the contrast control curve of the image to be displayed can be corrected based on the first proportion so as to increase the weight of the static contrast curve when the luminance is in the concentrated distribution and increase the weight of the histogram gain curve when the luminance is in the discrete distribution. By the method, the contrast of the images to be displayed with different brightness distributions is corrected, so that the images to be displayed with different brightness distributions can obtain a better viewing effect.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

FIG. 1 is a schematic illustration of a static contrast curve;

FIG. 2 is a schematic diagram of a contrast correction process in the prior art;

FIG. 3 is a schematic diagram of an application scenario of a display device according to an embodiment of the present application;

fig. 4 is a block diagram of a configuration of the control device 100 according to the embodiment of the present application;

fig. 5 is a block diagram of a hardware configuration of a display device 200 according to an embodiment of the present application;

FIG. 6 is a block diagram illustrating an architectural configuration of an operating system in a memory of the display device 200 according to an embodiment of the present application;

FIG. 7 is a flowchart illustrating a display method according to an embodiment of the present disclosure;

FIG. 8 is an exemplary two frame image to be displayed;

FIG. 9 is a normalized luminance histogram corresponding to the two frames of images to be displayed shown in FIG. 8;

fig. 10 is a two-frame corrected image to be displayed corresponding to fig. 8.

Detailed Description

In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort shall fall within the protection scope of the present application.

For better understanding of the technical aspects of the present application, the terms referred to in the present application and the prior art will be first described in detail.

Brightness: the brightness is also called lightness, and indicates the brightness of a color.

Contrast ratio: the brightness difference degree of pixel points in the image is larger, the contrast is higher, and the smaller the brightness difference is, the smaller the contrast is.

Static contrast curve: the method is used for carrying out static correction on the brightness of each pixel point in the image. The horizontal axis of the static contrast curve is the brightness before correction, and the vertical axis is the brightness after correction. Typically, different static contrast curves may be employed for different average brightnesses of the image. Illustratively, FIG. 1 is a schematic illustration of a static contrast curve. As shown in fig. 1, the luminance distribution graph includes a reference line and three static contrast curves, the three static contrast curves are respectively a static contrast curve H, a static contrast curve M, and a static contrast curve L, and when the average luminance (Yavg) is less than or equal to the average luminance lower threshold, the static contrast curve H is adopted; when the average brightness is equal to the middle threshold value of the average brightness, adopting a static contrast curve M; when the average brightness is larger than or equal to the average brightness high threshold value, adopting a static contrast curve L; when the average brightness is larger than the average brightness lower threshold value and smaller than the average brightness middle threshold value, a static contrast curve obtained by combining the static contrast curve H and the static contrast curve M according to a preset proportion can be adopted; when the average brightness is greater than the average brightness middle threshold and less than the average brightness high threshold, a static contrast curve obtained by combining the static contrast curve L and the static contrast curve M according to a preset ratio may be used.

Histogram gain curve: the histogram equalization method is used for performing different proportions of expansion on the brightness of each pixel point in the image according to the distribution condition of the histogram, namely, the histogram equalization.

Fig. 2 is a schematic flow chart of contrast correction in the prior art. As shown in fig. 2, the method comprises the following steps:

and S701, inputting an image, namely inputting a frame of image.

S702, carrying out brightness statistic analysis on the input image, and obtaining the average brightness of pixel points in the image and a brightness histogram of the pixel points in the image.

And S703, comparing the average brightness with the average brightness low threshold, the average brightness middle threshold and the average brightness high threshold to obtain a corresponding static contrast curve.

And S704, acquiring a histogram gain curve corresponding to the image according to the histogram distribution.

And S705, summing the static contrast curve and the histogram gain curve according to a preset proportional coefficient to obtain a contrast control curve. Illustratively, the contrast control curve may be obtained by the following equation (1):

Y _out ＝α*Y _APL +(1-α)*Y _hist (1)

wherein, Y _out As a contrast control curve, Y _APL As a static contrast curve, Y _hist Is a histogram gain curve, alpha is a preset proportionality coefficient, and alpha is more than 0 and less than 1.

And S706, outputting the image after the image is corrected by using the contrast control curve.

However, in the prior art, since the luminance distributions of different images are different, for example, the luminance distributions of partial images are concentrated near the average luminance and the luminance of partial images is distributed discretely, when the conventional contrast correction method (for example, the contrast correction method shown in fig. 2) is used to correct different images, the characteristics of the luminance distributions of the different images are not considered, and thus it is difficult to obtain a good viewing effect for the images with different luminance distributions.

Because the brightness histogram gain curve can carry out brightness expansion with different proportions according to the distribution condition of the brightness, when processing the image with the brightness in discrete distribution, the contrast of the image in discrete distribution can be better improved; the static contrast curve expands brightness relatively uniformly, and when an image with the brightness distributed in a concentrated manner is processed, the contrast of the image distributed in the concentrated manner can be improved better. Therefore, according to the display device and the display method provided by the embodiment of the application, by analyzing the distribution situation of the image brightness, when the brightness is in concentrated distribution, the proportion of the static contrast curve is increased, and when the brightness is in discrete distribution, the proportion of the histogram gain curve is increased, and by the method, the image contrast of different brightness distributions is corrected, so that the images of different brightness distributions can obtain better viewing effect.

It should be noted that the method provided by the present application is not only applicable to televisions, but also applicable to other display devices, such as computers, tablet computers, and the like.

The term "module," as used in various embodiments of the present application, may refer 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.

The term "hardware system" used in the embodiments of the present application may refer to a physical component having computing, controlling, storing, inputting and outputting functions, which is formed by a mechanical, optical, electrical and magnetic device such as an Integrated Circuit (IC), a Printed Circuit Board (PCB) and the like. In various embodiments of the present application, a hardware system may also be generally referred to as a motherboard (main) or main chip or controller.

Fig. 3 is a schematic application scenario diagram of a display device according to an embodiment of the present application. As shown in fig. 3, the control apparatus 100 and the display device 200 may communicate with each other in a wired or wireless manner.

Among them, the control apparatus 100 is configured to control the display device 200, which can receive an operation instruction input by a user and convert the operation instruction into an instruction recognizable and responsive by the display device 200, serving as an intermediary for interaction between the user and the display device 200. Such as: the user operates the channel up/down key on the control device 100, and the display device 200 responds to the channel up/down operation.

The control device 100 may be a remote controller 100A, which includes infrared protocol communication or bluetooth protocol communication, and other short-distance communication methods, etc. to control the display device 200 in a wireless or other wired manner. The user may input a user command through a key on a remote controller, a voice input, a control panel input, etc. to control the display apparatus 200. Such as: the user can input a corresponding control command through a volume up/down key, a channel control key, up/down/left/right moving keys, a voice input key, a menu key, a power on/off key, etc. on the remote controller, to implement the function of controlling the display device 200.

The control device 100 may also be a smart device, such as a mobile terminal 100B, a tablet computer, a notebook computer, and so on. For example, the display device 200 is controlled using an application program running on the smart device. The application program may provide various controls to a user through an intuitive User Interface (UI) on a screen associated with the smart device through configuration.

For example, the mobile terminal 100B may install a software application with the display device 200 to implement connection communication through a network communication protocol for the purpose of one-to-one control operation and data communication. Such as: the mobile terminal 100B may be caused to establish a control instruction protocol with the display device 200, and the functions of the physical keys as arranged by the remote control 100A may be implemented by operating various function keys or virtual controls of the user interface provided on the mobile terminal 100B. The audio and video content displayed on the mobile terminal 100B may also be transmitted to the display device 200, so as to implement a synchronous display function.

The display apparatus 200 may provide a network television function of a broadcast receiving function and a computer support function. The display device may be implemented as a digital television, a web television, an Internet Protocol Television (IPTV), or the like.

The display device 200 may be a liquid crystal display, an organic light emitting display, a projection device. The specific display device type, size, resolution, etc. are not limited.

The display apparatus 200 also performs data communication with the server 300 through various communication means. Here, the display apparatus 200 may be allowed to be communicatively connected through a Local Area Network (LAN), a Wireless Local Area Network (WLAN), and other networks. The server 300 may provide various contents and interactions to the display apparatus 200. By way of example, the display device 200 may send and receive information such as: receiving Electronic Program Guide (EPG) data, receiving software program updates, or accessing a remotely stored digital media library. The servers 300 may be a group or groups of servers, and may be one or more types of servers. Other web service contents such as video-on-demand and advertisement services are provided through the server 300.

Fig. 4 is a block diagram of a configuration of the control device 100 according to the embodiment of the present application. As shown in fig. 4, the control device 100 includes a controller 110, a memory 120, a communicator 130, a user input interface 140, a user output interface 150, and a power supply 160.

The controller 110 includes a Random Access Memory (RAM) 111, a Read Only Memory (ROM) 112, a processor 113, a communication interface, and a communication bus. The controller 110 is used to control the operation of the control device 100, as well as the internal components of the communication cooperation, external and internal data processing functions.

Illustratively, when an interaction of a user pressing a key disposed on the remote controller 100A or an interaction of touching a touch panel disposed on the remote controller 100A is detected, the controller 110 may control to generate a signal corresponding to the detected interaction and transmit the signal to the display device 200.

A memory 120 for storing various operation programs, data and applications for driving and controlling the control apparatus 100 under the control of the controller 110. The memory 120 may store various control signal commands input by a user.

The communicator 130 enables communication of control signals and data signals with the display apparatus 200 under the control of the controller 110. Such as: the control apparatus 100 transmits a control signal (e.g., a touch signal or a control signal) to the display device 200 via the communicator 130, and the control apparatus 100 may receive the signal transmitted by the display device 200 via the communicator 130. The communicator 130 may include an infrared signal interface 131 and a radio frequency signal interface 132. For example: when the infrared signal interface is used, the user input instruction needs to be converted into an infrared control signal according to an infrared control protocol, and the infrared control signal is sent to the display device 200 through the infrared sending module. And the following steps: when the rf signal interface is used, a user input command needs to be converted into a digital signal, and then modulated according to an rf control signal modulation protocol, and then transmitted to the display device 200 through the rf transmitting terminal.

The user input interface 140 may include at least one of a microphone 141, a touch pad 142, a sensor 143, a key 144, and the like, so that a user can input a user instruction regarding controlling the display apparatus 200 to the control apparatus 100 through voice, touch, gesture, press, and the like.

The user output interface 150 outputs a user instruction received by the user input interface 140 to the display apparatus 200, or outputs an image or voice signal received by the display apparatus 200. Here, the user output interface 150 may include an LED interface 151, a vibration interface 152 generating vibration, a sound output interface 153 outputting sound, a display 154 outputting images, and the like. For example, the remote controller 100A may receive an output signal such as audio, video, or data from the user output interface 150 and display the output signal in the form of an image on the display 154, an audio on the sound output interface 153, or a vibration on the vibration interface 152.

And a power supply 160 for providing operation power support for each element of the control device 100 under the control of the controller 110. In the form of a battery and associated control circuitry.

Fig. 5 is a block diagram of a hardware configuration of the display device 200 according to the embodiment of the present application. As shown in fig. 5, the display apparatus 200 may include a tuner demodulator 210, a communicator 220, a detector 230, an external device interface 240, a controller 250, a memory 260, a user interface 265, a video processor 270, a display 275, a rotating assembly 276, an audio processor 280, an audio output interface 285, and a power supply 290.

The rotating assembly 276 may include a driving motor, a rotating shaft, and the like. Wherein, the driving motor can be connected to the controller 250 and output the rotation angle under the control of the controller 250; one end of the rotation shaft is connected to a power output shaft of the driving motor, and the other end is connected to the display 275, so that the display 275 can be fixedly mounted on a wall or a bracket through the rotation member 276.

The rotating assembly 276 may also include other components, such as a transmission component, a detection component, and the like. Wherein, the transmission component can adjust the rotating speed and the torque output by the rotating component 276 through a specific transmission ratio, and can be in a gear transmission mode; the detection means may be composed of a sensor, such as an angle sensor, an attitude sensor, or the like, provided on the rotation shaft. These sensors may detect parameters such as the angle at which the rotating assembly 276 is rotated and transmit the detected parameters to the controller 250, so that the controller 250 can determine or adjust the state of the display apparatus 200 according to the detected parameters. In practice, rotating assembly 276 may include, but is not limited to, one or more of the components described above.

The tuner demodulator 210 receives the broadcast television signal in a wired or wireless manner, may perform modulation and demodulation processing such as amplification, mixing, and resonance, and is configured to demodulate, from a plurality of wireless or wired broadcast television signals, an audio/video signal carried in a frequency of a television channel selected by a user, and additional information (e.g., EPG data).

The tuner demodulator 210 is responsive to the user selected frequency of the television channel and the television signal carried by the frequency, as selected by the user and controlled by the controller 250.

The tuner demodulator 210 may receive a television signal in various ways according to the broadcasting system of the television signal, such as: terrestrial broadcasting, cable broadcasting, satellite broadcasting, internet broadcasting, or the like; and according to different modulation types, a digital modulation mode or an analog modulation mode can be adopted; and can demodulate the analog signal and the digital signal according to the different kinds of the received television signals.

In other exemplary embodiments, the tuning demodulator 210 may also be in an external device, such as an external set-top box. In this way, the set-top box outputs a television signal after modulation and demodulation, and inputs the television signal into the display apparatus 200 through the external device interface 240.

The communicator 220 is a component for communicating with an external device or an external server according to various communication protocol types. For example, the display apparatus 200 may transmit content data to an external apparatus connected via the communicator 220, or browse and download content data from an external apparatus connected via the communicator 220. The communicator 220 may include a network communication protocol module or a near field communication protocol module, such as a WIFI module 221, a bluetooth communication protocol module 222, and a wired ethernet communication protocol module 223, so that the communicator 220 may receive a control signal of the control device 100 according to the control of the controller 250 and implement the control signal as a WIFI signal, a bluetooth signal, a radio frequency signal, and the like.

The detector 230 is a component of the display apparatus 200 for collecting signals of an external environment or interaction with the outside. The detector 230 may include a sound collector 231, such as a microphone, which may be used to receive a user's sound, such as a voice signal of a control instruction of the user to control the display device 200; alternatively, ambient sounds may be collected that identify the type of ambient scene, enabling the display device 200 to adapt to ambient noise.

In some other exemplary embodiments, the detector 230, which may further include an image collector 232, such as a camera, a video camera, etc., may be configured to collect external environment scenes to adaptively change the display parameters of the display device 200; and the function of acquiring the attribute of the user or interacting gestures with the user so as to realize the interaction between the display equipment and the user.

In some other exemplary embodiments, the detector 230 may further include a light receiver for collecting the intensity of the ambient light to adapt to the display parameter variation of the display device 200.

In some other exemplary embodiments, the detector 230 may further include a temperature sensor, such as by sensing an ambient temperature, and the display device 200 may adaptively adjust a display color temperature of the image. For example, when the temperature is higher, the display apparatus 200 may be adjusted to display a color temperature of an image that is cooler; when the temperature is lower, the display device 200 may be adjusted to display a warmer color temperature of the image.

The external device interface 240 is a component for providing the controller 250 to control data transmission between the display apparatus 200 and an external apparatus. The external device interface 240 may be connected to an external apparatus such as a set-top box, a game device, a notebook computer, etc. in a wired/wireless manner, and may receive data such as a video signal (e.g., moving image), an audio signal (e.g., music), additional information (e.g., EPG), etc. of the external apparatus.

The external device interface 240 may include: a High Definition Multimedia Interface (HDMI) terminal 241, a Composite Video Blanking Sync (CVBS) terminal 242, an analog or digital Component terminal 243, a Universal Serial Bus (USB) terminal 244, a Component terminal (not shown), a red, green, blue (RGB) terminal (not shown), and the like.

The controller 250 controls the operation of the display device 200 and responds to the operation of the user by running various software control programs (such as an operating system and various application programs) stored on the memory 260.

As shown in fig. 5, the controller 250 includes a Random Access Memory (RAM) 251, a Read Only Memory (ROM) 252, a graphics processor 253, a CPU processor 254, a communication interface 255, and a communication bus 256. The RAM251, the ROM252, the graphic processor 253, and the CPU processor 254 are connected to each other through a communication bus 256 through a communication interface 255.

The ROM252 stores various system boot instructions. When the display apparatus 200 starts power-on upon receiving the power-on signal, the CPU processor 254 executes a system boot instruction in the ROM252, copies the operating system stored in the memory 260 to the RAM251, and starts running the boot operating system. After the start of the operating system is completed, the CPU processor 254 copies the various application programs in the memory 260 to the RAM251 and then starts running and starting the various application programs.

And a graphic processor 253 for generating various graphic objects such as icons, operation menus, and user input instruction display graphics, etc. The graphic processor 253 may include an operator for performing an operation by receiving various interactive instructions input by a user, and further displaying various objects according to display attributes; and a renderer for generating various objects based on the operator and displaying the rendered result on the display 275.

A CPU processor 254 for executing operating system and application program instructions stored in memory 260. And executing processing of various applications, data and contents according to the received user input instruction so as to finally display and play various audio and video contents.

In some example embodiments, the CPU processor 254 may comprise a plurality of processors. The plurality of processors may include one main processor and a plurality of or one sub-processor. A main processor for performing some initialization operations of the display apparatus 200 in the display apparatus preload mode and/or operations of displaying a screen in the normal mode. A plurality of or one sub-processor for performing an operation in a state of a display device standby mode or the like.

The communication interface 255 may include a first interface to an nth interface. These interfaces may be network interfaces that are connected to external devices via a network.

The controller 250 may control the overall operation of the display apparatus 200. For example: in response to receiving a user input command for selecting a GUI object displayed on the display 275, the controller 250 may perform an operation related to the object selected by the user input command.

Where the object may be any one of the selectable objects, such as a hyperlink or an icon. The operation related to the selected object is, for example, an operation of displaying a link to a hyperlink page, document, image, or the like, or an operation of executing a program corresponding to the object. The user input command for selecting the GUI object may be a command input through various input means (e.g., a mouse, a keyboard, a touch panel, etc.) connected to the display apparatus 200 or a voice command corresponding to a voice spoken by the user.

A memory 260 for storing various types of data, software programs, or applications that drive and control the operation of the display device 200. The memory 260 may include volatile and/or non-volatile memory. And the term "memory" includes the memory 260, the RAM251 and the ROM252 of the controller 250, or a memory card in the display device 200.

In some embodiments, the memory 260 is specifically used for storing an operating program for driving the controller 250 of the display device 200; storing various application programs built in the display apparatus 200 and downloaded by a user from an external apparatus; data such as visual effect images for configuring various GUIs provided by the display 275, various objects related to the GUIs, and selectors for selecting the GUI objects are stored.

In some embodiments, memory 260 is specifically configured to store drivers for tuner demodulator 210, communicator 220, detector 230, external device interface 240, video processor 270, display 275, audio processor 280, etc., and related data, such as external data (e.g., audio-visual data) received from the external device interface or user data (e.g., key information, voice information, touch information, etc.) received by the user interface.

In some embodiments, memory 260 specifically stores software and/or programs representing an Operating System (OS), which may include, for example: a kernel, middleware, an Application Programming Interface (API), and/or an application program. Illustratively, the kernel may control or manage system resources, as well as functions implemented by other programs (e.g., middleware, APIs, or applications); at the same time, the kernel may provide an interface to allow middleware, APIs, or applications to access the controller to enable control or management of system resources.

Fig. 6 is a block diagram illustrating an architecture configuration of an operating system in a memory of the display device 200 according to an embodiment of the present application. The operating system architecture comprises an application layer, a middleware layer and a kernel layer from top to bottom.

The application layer, the application programs built in the system and the non-system-level application programs belong to the application layer. Is responsible for direct interaction with the user. The application layer may include a plurality of applications such as a setup application, a post application, a media center application, and the like. These applications may be implemented as Web applications that execute based on a WebKit engine, and in particular may be developed and executed based on HTML5, cascading Style Sheets (CSS), and JavaScript.

Here, HTML, which is called HyperText Markup Language (HyperText Markup Language) as a whole, is a standard Markup Language for creating web pages, and describes web pages through Markup tags, where the HTML tags are used to describe characters, graphics, animation, sound, tables, links, etc., and a browser reads an HTML document, interprets the content of tags in the document, and displays the content in the form of web pages.

CSS, known as Cascading Style Sheets (Cascading Style Sheets), is a computer language used to represent the Style of HTML documents, and may be used to define Style structures, such as fonts, colors, locations, etc. The CSS style can be directly stored in the HTML webpage or a separate style file, so that the style in the webpage can be controlled.

JavaScript, a language applied to programming Web pages, can be inserted into an HTML page and interpreted and executed by a browser. The interaction logic of the Web application is realized by JavaScript. The JavaScript can package a JavaScript extension interface through a browser, realize the communication with the kernel layer,

the middleware layer can provide some standardized interfaces to support the operation of various environments and systems. For example, the middleware layer may be implemented as multimedia and hypermedia information coding experts group (MHEG) middleware related to data broadcasting, DLNA middleware which is middleware related to communication with an external device, middleware which provides a browser environment in which each application program in the display device operates, and the like.

The kernel layer provides core system services such as: file management, memory management, process management, network management, system security authority management and the like. The kernel layer may be implemented as a kernel based on various operating systems, for example, a kernel based on the Linux operating system.

The kernel layer also provides communication between system software and hardware, and provides device driver services for various hardware, such as: provide display driver for the display, provide camera driver for the camera, provide button driver for the remote controller, provide wiFi driver for the WIFI module, provide audio driver for audio output interface, provide power management drive for Power Management (PM) module etc..

In fig. 5, user interface 265, receives various user interactions. Specifically, it is used to transmit an input signal of a user to the controller 250 or transmit an output signal from the controller 250 to the user. For example, the remote controller 100A may transmit an input signal, such as a power switch signal, a channel selection signal, a volume adjustment signal, etc., input by the user to the user interface 265, and then the input signal is transferred to the controller 250 through the user interface 265; alternatively, the remote controller 100A may receive an output signal such as audio, video, or data output from the user interface 265 via the controller 250, and display the received output signal or output the received output signal in audio or vibration form.

In some embodiments, a user may enter user commands on a Graphical User Interface (GUI) displayed on the display 275, and the user interface 265 receives the user input commands through the GUI. Specifically, the user interface 265 may receive user input commands for controlling the position of a selector in the GUI to select different objects or items. Among these, "user interfaces" are media interfaces for interaction and information exchange between an application or operating system and a user, which enable the conversion between an internal form of information and a form acceptable to the user. A common presentation form of the user interface is a Graphical User Interface (GUI), which refers to a user interface related to computer operations and displayed in a graphical manner. It may be an interface element such as an icon, window, control, etc. displayed in the display of the electronic device, where the control may include a visual interface element such as an icon, control, menu, tab, text box, dialog box, status bar, channel bar, widget, etc.

Alternatively, the user may input a user command by inputting a specific sound or gesture, and the user interface 265 receives the user input command by recognizing the sound or gesture through the sensor.

The video processor 270 is configured to receive an external video signal, and perform video data processing such as decompression, decoding, scaling, noise reduction, frame rate conversion, resolution conversion, and image synthesis according to a standard codec protocol of the input signal, so as to obtain a video signal that is directly displayed or played on the display 275.

Illustratively, the video processor 270 includes a demultiplexing module, a video decoding module, an image synthesizing module, a frame rate conversion module, a display formatting module, and the like.

The demultiplexing module is configured to demultiplex an input audio/video data stream, for example, an input MPEG-2 stream (based on a compression standard of a digital storage media moving image and voice), and demultiplex the input audio/video data stream into a video signal and an audio signal.

And the video decoding module is used for processing the demultiplexed video signal, including decoding, scaling and the like.

And the image synthesis module, such as an image synthesizer, is used for performing superposition mixing processing on the GUI signal input by the user or generated by the user and the video image after the zooming processing by the graphics generator so as to generate an image signal for display.

The frame rate conversion module is configured to convert a frame rate of an input video, for example, convert a frame rate of an input 60Hz video into a frame rate of 120Hz or 240Hz, where a common format is implemented by using, for example, an interpolation frame method.

And a display formatting module for converting the signal output by the frame rate conversion module into a signal conforming to a display format of a display, such as converting the format of the signal output by the frame rate conversion module to output an RGB data signal.

A display 275 for receiving the image signal from the video processor 270 and displaying the video content, the image and the menu manipulation interface. The video content may be displayed from the video content in the broadcast signal received by the tuner/demodulator 210, or from the video content input by the communicator 220 or the external device interface 240. The display 275, while displaying a user manipulation interface UI generated in the display apparatus 200 and used to control the display apparatus 200.

And, the display 275 may include a display component for presenting a picture and a driving component for driving the display of an image. Alternatively, a projection device and projection screen may be included, provided display 275 is a projection display.

Rotating assembly 276, the controller may issue a control signal to cause rotating assembly 276 to rotate display 255.

The audio processor 280 is configured to receive an external audio signal, and perform decompression and decoding, and audio data processing such as noise reduction, digital-to-analog conversion, and amplification according to a standard codec protocol of the input signal, so as to obtain an audio signal that can be played in the speaker 286.

Illustratively, audio processor 280 may support various audio formats. Such as MPEG-2, MPEG-4, advanced Audio Coding (AAC), high efficiency AAC (HE-AAC), and the like.

An audio output interface 285 for receiving an audio signal output from the audio processor 280 under the control of the controller 250, and the audio output interface 285 may include a speaker 286 or an external audio output terminal 287, such as an earphone output terminal, for outputting to a generating device of an external device.

In other exemplary embodiments, video processor 270 may comprise one or more chips. Audio processor 280 may also comprise one or more chips.

And, in other exemplary embodiments, the video processor 270 and the audio processor 280 may be separate chips or may be integrated with the controller 250 in one or more chips.

And a power supply 290 for supplying power supply support to the display apparatus 200 from the power input from the external power source under the control of the controller 250. The power supply 290 may be a built-in power supply circuit installed inside the display apparatus 200 or may be a power supply installed outside the display apparatus 200.

Fig. 7 is a schematic flowchart of a display method according to an embodiment of the present application. Wherein the controller 250 is connected to the display 275, for an actual control process, as shown in fig. 7, the controller 250 may be further configured to perform the following steps:

s101, obtaining the average brightness of the image to be displayed and the brightness histogram of the image to be displayed.

The image to be displayed may be a frame of image, for example, the image to be displayed may be a photo to be displayed. The image to be displayed may also be a frame of image in a video.

The average brightness of the image to be displayed is the average value of the brightness of each pixel point in the image to be displayed, the brightness histogram of the image to be displayed is that the brightness value range is divided into a plurality of intervals, and the numerical value of each interval is used for standardizing the number of the pixel points of which the brightness is in the interval in the image to be displayed.

In one possible implementation, after step S101, the luminance histogram may be subjected to a normalization process. Through normalization processing, the brightness histograms of the images to be displayed with different resolutions or different pixel numbers can be unified so as to facilitate further processing.

Illustratively, FIG. 8 is an exemplary two frame image to be displayed. As shown in fig. 8, the average luminance in fig. 8 (a) is 104, and the average luminance in fig. 8 (b) is 90.

Taking the luminance histogram divided into 16 intervals as an example, the 16 luminance intervals are respectively: 0-15, 16-31, 32-47, 48-63, 64-79, 80-95, 96-111, 112-127, 128-143, 144-159, 160-175, 176-191, 192-207, 208-223, 224-239 and 240-255 (the serial numbers of the brightness intervals are ordered from left to right). Fig. 9 is a normalized luminance histogram corresponding to the two frames of images to be displayed shown in fig. 8. As shown in fig. 9, fig. 9 (a) is a luminance histogram corresponding to fig. 8 (a), and fig. 9 (b) is a luminance histogram corresponding to fig. 8 (b).

The method for obtaining the average brightness of the image to be displayed and the brightness histogram of the image to be displayed can be implemented based on the existing statistical method, and details are not repeated in this embodiment.

S102, whether the sequence number of the first target interval is the same as that of the second target interval is judged.

The first target interval is an interval where the average brightness in the brightness histogram is located, and the second target interval is an interval where the pixel ratio in the brightness histogram is the highest.

With continuing reference to the example of fig. 8 and 9, for the image to be displayed shown in fig. 8 (a), the average luminance is 104, the first target interval is the 7 th interval (96-111) of the luminance histogram located in fig. 9 (a), and the second target interval is the 6 th interval (80-95) of the luminance histogram located in fig. 9 (a). For the image to be displayed shown in fig. 8 (b), the average luminance is 90, the first target interval is the 6 th interval (80-95) of the luminance histogram in fig. 9 (b), and the second target interval is the 2 nd interval (16-31) of the luminance histogram in fig. 9 (b).

If yes, it is indicated that the brightness of the pixel points in the image to be displayed is intensively distributed in the average brightness, and the contrast of the image to be displayed can be better improved without correcting the proportionality coefficient, and at this time, step S103 can be executed; if not, it is stated that the brightness of the pixel points in the image to be displayed is not distributed in the average brightness in a centralized manner, and the scale factor needs to be corrected to improve the contrast of the image to be displayed, and then step S104 may be executed.

And S103, not correcting the contrast control curve of the image to be displayed.

And calculating the contrast control curve by adopting a preset proportionality coefficient without correcting the contrast control curve of the image to be displayed.

Wherein the proportionality coefficient is used to indicate the proportion of the static contrast curve in the contrast control curve or the proportion of the histogram gain curve in the contrast control curve. When the proportionality coefficient is used to indicate the proportion of the static contrast curve in the contrast control curve, the proportionality coefficient is a in formula (1).

And S104, acquiring a first ratio.

The first proportion is the proportion of the pixel points in the first target interval and the sum of the proportions of the pixel points in the interval which is away from the first target interval by the preset distance.

In a first possible implementation manner, the preset distance is a preset static parameter. I.e. the preset distance may be set according to the actual situation, e.g. the preset distance j =2.

In a second possible implementation manner, the preset distance is obtained by the following formula (2):

wherein j is a preset distance, N is the number of intervals of the luminance histogram, and K is a preset luminance range. The preset brightness range can be set according to actual conditions.

Assuming N =16 as an example, the preset luminance range is 30%, for

Rounding off gives j =1.

In a third possible implementation manner, the preset distance may be a formula

Rounding off the results. For example, assuming N =16, the preset luminance range is 30%, for

Rounding off gives j =2.

On the basis of determining the preset distance j, the first proportion may be obtained, for example, by the following formula (3):

wherein, hist _APL Is the first ratio, index is the sequence number of the first target section, hist _i Is the ratio of the pixel points in the ith interval.

With continued reference to the examples of fig. 8 and 9, the description will be made taking j =2 as an example. For the image to be displayed in fig. 8 (a), the first occupation ratio is the sum of the occupation ratios of the first target section and 5 sections (64-79, 80-95, 96-111, 112-127, 128-143) adjacent to the left and right of the first target section, i.e., 64.8%. For the image to be displayed in fig. 8 (b), the first occupation ratio is the sum of the occupation ratios of the first target section and 5 sections (48-63, 64-79, 80-95, 96-111, 112-127) adjacent to the left and right of the first target section, i.e., 16.7%.

And S105, correcting the contrast control curve of the image to be displayed according to the first ratio.

In one possible implementation manner, the proportion coefficient is corrected according to the first proportion, a preset proportion threshold value and a preset proportion coefficient; and correcting the contrast control curve of the image to be displayed according to the corrected proportional coefficient, the static contrast curve and the histogram gain curve. This method will be described in detail in the examples below.

Alternatively, the preset duty ratio threshold may be determined according to a preset luminance range. For example, the preset duty ratio threshold may be preset by a preset brightness range of a multiple, where the preset multiple may be set according to actual conditions. For example, the preset luminance range is 30%, and when the preset multiple is 1, the preset duty threshold is 30%. By associating the preset ratio threshold with the preset brightness range, when the second or third method for calculating the preset distance is adopted, the preset ratio threshold and the preset distance are substantially associated, and since the divided preset distance directly affects the size of the first ratio and the preset ratio threshold directly affect the proportionality coefficient, the accuracy of correcting the proportionality coefficient can be improved through the association.

In another possible implementation manner, the scale factor is corrected according to the first proportion, and the contrast control curve of the image to be displayed is corrected according to the corrected scale factor, the static contrast curve and the histogram gain curve. In this manner, for example, the first ratio may be set as a scaling factor of the static contrast curve in the contrast control curve.

The first proportion can represent the distribution condition of the brightness of the image to be displayed in a concentrated distribution mode or in a discrete distribution mode. Therefore, the contrast control curve of the image to be displayed can be corrected based on the first proportion so as to increase the weight of the static contrast curve when the luminance is in the concentrated distribution and increase the weight of the histogram gain curve when the luminance is in the discrete distribution. By the method, the contrast of the images to be displayed with different brightness distributions is corrected, so that the images to be displayed with different brightness distributions can obtain a better viewing effect.

And S106, correcting the image to be displayed by using the contrast control curve to obtain the corrected image to be displayed.

For example, when the scale factor is used to indicate the proportion of the static contrast curve in the contrast control curve, the contrast control curve may be obtained by using the method shown in formula (1), and the brightness of each pixel in the image to be displayed is corrected to obtain the corrected image to be displayed.

When the proportion coefficient is used to indicate the proportion of the histogram gain curve in the contrast control curve, only the positions of α and (1- α) in the formula (1) need to be replaced, which is not described in detail in this embodiment.

And S107, controlling the display to display the corrected image to be displayed.

Illustratively, fig. 10 is a two-frame modified image to be displayed corresponding to fig. 8. As shown in fig. 10, fig. 10 (a) is the corrected image to be displayed corresponding to the image to be displayed shown in fig. 8 (a), and fig. 10 (b) is the corrected image to be displayed corresponding to the image to be displayed shown in fig. 8 (b), and it can be seen that, for fig. 8 (a) and fig. 8 (b) with different brightness distributions, better viewing effect can be obtained after the contrast correction is performed by the method of the present application.

According to the method, the first proportion can represent that the distribution condition of the brightness of the image to be displayed is in concentrated distribution or in discrete distribution. Therefore, the contrast control curve of the image to be displayed can be corrected based on the first proportion so as to increase the weight of the static contrast curve when the luminance is in the concentrated distribution and increase the weight of the histogram gain curve when the luminance is in the discrete distribution. By the method, the contrast of the images to be displayed with different brightness distributions is corrected, so that the images to be displayed with different brightness distributions can obtain a better viewing effect.

The following embodiment will focus on how the scaling factor is modified based on the first ratio, the preset ratio threshold, and the second ratio.

In the first case, when the scale factor is used to indicate the proportion of the static contrast curve in the contrast control curve, the following manner may be adopted:

if the first ratio is larger than the preset ratio threshold, it is indicated that the brightness of the image to be displayed is in concentrated distribution, and at this time, the specific gravity of the static contrast curve can be increased, that is, the ratio coefficient is used for increasing the ratio of the static contrast curve.

If the first ratio is smaller than the preset ratio threshold, it indicates that the brightness of the image to be displayed is in discrete distribution, and at this time, the specific gravity of the histogram gain curve can be increased, that is, the proportionality coefficient is used for reducing the ratio of the static contrast curve.

If the first occupation ratio is equal to the preset occupation ratio threshold value, it is indicated that the brightness distribution of the image to be displayed is between the concentrated distribution and the discrete distribution, at this time, the proportion of the static contrast curve and the histogram gain curve does not need to be corrected, that is, the proportion coefficient is used for keeping the occupation ratio of the static contrast curve unchanged.

The correction proportionality coefficient can specifically adopt the following mode:

mode (1): the proportionality coefficient is obtained by the following formula (4),

wherein alpha' is a proportionality coefficient, hist _APL The first ratio is X is a preset ratio threshold value, and alpha is a proportionality coefficient before correction. If α ' obtained according to formula (4) satisfies α ' > 1, α ' =1 may be selected.

In this embodiment, the scaling factor is determined by the scaling factor before correction and a proportional relationship between the first proportion and a preset proportion threshold, where α ' > α is greater than a preset proportion threshold when the first proportion is greater than the preset proportion threshold, α ' < α is smaller than a preset proportion threshold when the first proportion is smaller than the preset proportion threshold, and α ' = α is equal to the preset proportion threshold when the first proportion is equal to the preset proportion threshold.

Illustratively, for the image to be displayed in fig. 8 (1), the ratio of the first duty ratio to the preset duty ratio threshold is 64.8%/30% =2.16, α' > α; for the image to be displayed in fig. 8 (2), the ratio of the first duty to the preset duty threshold is 16.7%/30% =0.56, and α' < α.

Mode (2): the proportionality coefficient is obtained by the following formula (5),

wherein alpha' is a proportionality coefficient, hist _APL The correction parameter is a first ratio, X is a preset ratio threshold, d is a proportionality coefficient before correction, k is a first correction parameter, and b is a second correction parameter. If α ' obtained according to the formula (5) satisfies α ' > 1, α ' =1 may be assumed. Wherein the first correction parameter and the second correction parameterThe number can be set according to actual conditions, and the flexibility of the correction proportionality coefficient can be increased by adding the first correction parameter and the second correction parameter.

In the second case, when the scale factor is used to indicate the proportion of the histogram gain curve in the contrast control curve, the following may be adopted:

if the first ratio is larger than the preset ratio threshold, it indicates that the brightness of the image to be displayed is in concentrated distribution, and at this time, the proportion of the static contrast curve can be increased, that is, the proportion coefficient is used for reducing the ratio of the histogram gain curve.

If the first duty ratio is smaller than the preset duty ratio threshold, it indicates that the brightness of the image to be displayed is in discrete distribution, and at this time, the specific gravity of the histogram gain curve can be increased, that is, the scale coefficient is used for increasing the duty ratio of the histogram gain curve.

The correction proportionality coefficient may specifically adopt the following manner:

mode (1): the proportionality coefficient is obtained by the following formula (6),

wherein alpha' is a proportionality coefficient, hist _APL If α ' obtained according to equation (6) satisfies α ' > 1, α ' =1 may be selected.

In this mode, the scaling factor is determined by the scaling factor before correction and a proportional relationship between the first proportion and a preset proportion threshold, where α ' < α when the first proportion is greater than the preset proportion threshold, α ' > α when the first proportion is less than the preset proportion threshold, and α ' = α when the first proportion is equal to the preset proportion threshold.

Mode (2): the proportionality coefficient is obtained by the following formula (7),

wherein alpha' is a proportionality coefficient, hist _APL The ratio is a first ratio, X is a preset ratio threshold, d is a proportionality coefficient before correction, k is a first correction parameter, and b is a second correction parameter. If α ' obtained according to the formula (7) satisfies α ' > 1, α ' =1 may be assumed. The first correction parameter and the second correction parameter can be set according to actual conditions, and the flexibility of correcting the proportionality coefficient can be increased by adding the first correction parameter and the second correction parameter.

According to the method, the proportion coefficient is obtained through calculation according to the first proportion, the preset proportion threshold value and the proportion coefficient before correction, the image to be displayed is corrected based on the proportion coefficient, the static contrast curve and the contrast control curve obtained through the histogram gain curve, the contrast of the image to be displayed with different brightness distributions is corrected through the method, and the image to be displayed with different brightness distributions can obtain a good viewing effect.

Based on the display device 200, the present application further provides a display method, which includes:

and acquiring the average brightness of the image to be displayed and the brightness histogram of the image to be displayed.

If the sequence number of the first target interval is different from the sequence number of the second target interval, acquiring a first occupation ratio; the first target interval is an interval where the average brightness in the brightness histogram is located, and the second target interval is an interval where the pixel point proportion in the brightness histogram is the highest; the first ratio is the sum of the ratio of the pixel points in the first target interval and the ratio of the pixel points in the interval which is away from the first target interval by the preset distance.

And correcting the contrast control curve of the image to be displayed according to the first ratio.

Optionally, in a possible implementation, the preset distance is a preset static parameter.

Alternatively, in one possible implementation, the preset distance is obtained by the following equation (8),

wherein j is a preset distance, N is the number of intervals of the luminance histogram, and K is a preset luminance range.

Optionally, in a possible implementation manner, the preset distance may be a formula

Rounded results.

Optionally, in a possible implementation manner, if the number of the first target section is the same as the number of the second target section, the contrast control curve of the image to be displayed is not modified.

Optionally, in a possible implementation manner, modifying the contrast control curve of the image to be displayed according to the first ratio may specifically include:

correcting a proportionality coefficient according to the first proportion, a preset proportion threshold value and a correction proportionality coefficient; the scaling factor is used to indicate the proportion of the static contrast curve in the contrast control curve or the proportion of the histogram gain curve in the contrast control curve.

And correcting the contrast control curve of the image to be displayed according to the corrected proportional coefficient, the static contrast curve and the histogram gain curve.

Optionally, in a possible implementation, the preset duty ratio threshold is determined according to a preset brightness range.

Optionally, in a possible implementation manner, the first proportion is obtained by the following formula (9):

Optionally, in a possible implementation, if the scaling factor is used to indicate a proportion of the static contrast curve in the contrast control curve, the scaling factor is used to increase the proportion of the static contrast curve when the first proportion is greater than a preset proportion threshold; when the first ratio is smaller than a preset ratio threshold, the proportionality coefficient is used for reducing the ratio of the static contrast curve; when the first ratio is equal to the preset ratio threshold, the proportionality coefficient is used for keeping the ratio of the static contrast curve unchanged.

Alternatively, in a possible implementation, if a proportionality coefficient is used to indicate the proportion of the static contrast curve in the contrast control curve, the proportionality coefficient is obtained by the following equation (10),

wherein alpha' is a proportionality coefficient, hist _APL The first ratio is X is a preset ratio threshold value, and alpha is a proportionality coefficient before correction.

Alternatively, in a possible implementation, if a scaling factor is used to indicate the proportion of the static contrast curve in the contrast control curve, the scaling factor is obtained by the following equation (11),

wherein alpha' is a proportionality coefficient, hist _APL The ratio is a first ratio, X is a preset ratio threshold, d is a proportionality coefficient before correction, k is a first correction parameter, and b is a second correction parameter.

Optionally, in a possible implementation manner, after obtaining the average brightness of the image to be displayed and the brightness histogram of the image to be displayed, the brightness histogram is normalized.

The display method provided in the embodiment of the present application is similar to the principle of the display device when executing the display method, and reference may be specifically made to the foregoing description, which is not repeated.

In the display method provided by the embodiment of the application, the execution main body for executing the method may be the controller itself, or may be a chip of the controller.

The embodiments provided in the present application are only a few examples of the general concept of the present application, and do not limit the scope of the present application. Any other embodiments extended according to the scheme of the present application without inventive efforts will be within the scope of protection of the present application for a person skilled in the art.

Claims

1. A display device, comprising:

a display;

a controller connected to the display and configured to:

if the sequence number of the first target interval is different from the sequence number of the second target interval, acquiring a first occupation ratio; the first target interval is an interval where the average brightness in the brightness histogram is located, and the second target interval is an interval where the pixel proportion in the brightness histogram is highest; the first ratio is the sum of the ratio of the pixel points in the first target interval and the ratio of the pixel points in an interval which is a preset distance away from the first target interval;

controlling the display to display the corrected image to be displayed;

the correcting the contrast control curve of the image to be displayed according to the first proportion specifically comprises:

calculating to obtain a corrected proportionality coefficient according to the first proportion, a preset proportion threshold and the proportionality coefficient before correction; the proportion coefficient is used for indicating the proportion of a static contrast curve in a contrast control curve, or the proportion of a histogram gain curve in the contrast control curve;

correcting the contrast control curve of the image to be displayed according to the corrected proportional coefficient, the static contrast curve and the histogram gain curve;

if the scaling factor is indicative of a fraction of the static contrast curve in the contrast control curve, the controller is further configured to:

if the first ratio is larger than a preset ratio threshold, the ratio coefficient is used for increasing the ratio of the static contrast curve;

if the first ratio is smaller than the preset ratio threshold, the ratio coefficient is used for reducing the ratio of the static contrast curve;

if the first ratio is equal to the preset ratio threshold, the ratio coefficient is used for keeping the ratio of the static contrast curve unchanged;

if the scaling factor is indicative of a proportion of the histogram gain curve in the contrast control curve, the controller is further configured to:

if the first occupation ratio is larger than a preset occupation ratio threshold value, the proportion coefficient is used for reducing the occupation ratio of the histogram gain curve;

if the first ratio is smaller than a preset ratio threshold, the proportional coefficient is used for increasing the ratio of the histogram gain curve;

and if the first occupation ratio is equal to a preset occupation ratio threshold value, the proportion coefficient is used for keeping the occupation ratio of the histogram gain curve unchanged.

2. The display device of claim 1, wherein the controller is further configured to:

and if the serial number of the first target interval is the same as that of the second target interval, not correcting the contrast control curve of the image to be displayed.

3. The display device of claim 1, wherein the controller is further configured to:

the preset distance satisfies the following formula,

the j is a preset distance, the N is the number of intervals of the brightness histogram, and the K is a preset brightness range.

4. The display device of claim 3, wherein the controller is further configured to:

the first proportion is obtained by the following formula:

wherein, the Hist _APL The index is the sequence number of the first target section, and the Hist is the first percentage _i Is the ratio of the pixel points in the ith interval.

5. The display device of claim 1, wherein if the scaling factor is used to indicate a proportion of the static contrast curve in the contrast control curve, the controller is further configured to:

the scaling factor is obtained by the following formula,

wherein α' is a proportionality coefficient, and Hist _APL And the first ratio is obtained, the X is the preset ratio threshold, and the alpha is a proportionality coefficient before correction.

6. The display device of claim 1, wherein if the scaling factor is used to indicate a proportion of the static contrast curve in the contrast control curve, the controller is further configured to:

the scaling factor is obtained by the following formula,

wherein α' is a proportionality coefficient, hist _APL The first ratio is set, the X is the preset ratio threshold, the alpha is a proportionality coefficient before correction, the k is a first correction parameter, and the b is a second correction parameter.

7. The display device according to any one of claims 1-6, wherein the controller is further configured to:

after the average brightness of the image to be displayed and the brightness histogram of the image to be displayed are obtained, normalization processing is carried out on the brightness histogram.

8. A method of displaying, the method comprising:

if the scaling factor is used to indicate a proportion of the histogram gain curve in the contrast control curve, the controller is further configured to:

if the first ratio is larger than a preset ratio threshold, the ratio coefficient is used for reducing the ratio of the histogram gain curve;

if the first proportion is equal to a preset proportion threshold value, the proportion coefficient is used for keeping the proportion of the histogram gain curve unchanged;