WO2021189708A1

WO2021189708A1 - Method for turning on screen protection for display device, and display device

Info

Publication number: WO2021189708A1
Application number: PCT/CN2020/100939
Authority: WO
Inventors: 曹圆圆
Original assignee: 海信视像科技股份有限公司
Priority date: 2020-03-26
Filing date: 2020-07-08
Publication date: 2021-09-30
Also published as: CN111432257A

Abstract

Embodiments of the present application relate to the field of display technology, and in particular involve a method for turning on screen protection for a display device and a display device, where a plurality of image partitions corresponding to an image to be displayed which will be displayed on a display device are obtained, and brightness information of each image partition is determined according to gray scale values of all pixels within each image partition; with respect to the image partitions, when it is determined that the brightness information of a preset proportion of the image partitions has not changed for a length of time that exceeds a preset length of time, the display device is controlled to display screen protection.

Description

Method for opening screen protection of display device and display device

This application requires priority to be submitted to the Chinese Patent Office on March 26, 2020, the application number is CN202010222463.8, and the application name is "a method for opening the screen protection of a display device and a display device", the entire content of which is incorporated by reference in In this application.

Technical field

This application relates to the field of display technology, and in particular to a method for opening a screen saver on a display device and a display device.

Background technique

OLED display technology has the advantages of self-luminescence, wide viewing angle, almost infinitely high contrast, low power consumption, and extremely high response speed. In recent years, major domestic and foreign manufacturers have successively launched high-end TVs with OLED screens. Although OLED has the above-mentioned various advantages, it also has a fatal flaw of "burning screen".

The correct term for "burning screen" should be called "residual". As long as it is a self-luminous display, whether it is a picture tube, plasma or OLED, there will be "after-image" phenomenon. When the image remains unchanged for a long time and the contrast of the image is strong, after the image is switched, there will be some shadows in the original bright part of the image. This is caused by the limitations of OLED display technology, because the luminous efficiency of the blue, red and green light sources is inconsistent. Among them, blue pixels are the most prone to decline, red pixels are second, and green pixels are the least prone to decline. Generally, this "after-image" will gradually fade after the screen is static for a short period of time, but if the still image is played for a long time or accumulated for a long time, it will cause permanent damage to the display, that is, the "after-image" will not fade.

Summary of the invention

The present application provides a method for turning on the screen protection of a display device and the display device to avoid permanent damage to the OLED display.

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

monitor;

User interface, used to receive instructions entered by the user;

Controller, used to execute:

Acquiring multiple subarea images corresponding to the image to be displayed to be displayed on the display, and determining the brightness information of each subarea image according to the gray value of each pixel in each of the subarea images;

For each of the partition images, when it is determined that the time period during which the brightness information of the partition image of the preset ratio has not changed exceeds the preset time period, the display is controlled to display a screen saver.

Further, when the user input is detected, the display is controlled to exit the screen saver.

Further, the screen saver is to automatically play a group of pictures or videos according to a certain length of time.

Further, the preset ratio is 90%-95%.

Further, the brightness information of the partition image is obtained in the following manner: the average gray scale value of all pixels in the partition image, or the maximum gray scale value in all pixels, or the root mean square of the gray scale values of all pixels.

In a second aspect, a method for opening a screen saver on a display device is provided, including:

Further, the preset ratio is 90%-95%.

Description of the drawings

In order to explain the embodiments of the present application more clearly, the following will briefly introduce the drawings that need to be used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application, which are common in the field. As far as technical personnel are concerned, they can also obtain other drawings based on these drawings without creative labor.

FIG. 1A exemplarily shows a schematic diagram of an operation scene between a display device and a control device;

FIG. 1B exemplarily shows a configuration block diagram of the control device 100 in FIG. 1A;

FIG. 1C exemplarily shows a configuration block diagram of the display device 200 in FIG. 1A;

FIG. 1D exemplarily shows a block diagram of the architecture configuration of the operating system in the memory of the display device 200;

FIG. 2 exemplarily shows a schematic diagram of a GUI provided by the display device 200;

FIG. 3 exemplarily shows a schematic diagram of another GUI provided by the display device 200;

FIG. 4 exemplarily shows a flowchart of a method for turning on a screen saver on a display device;

FIG. 5 exemplarily shows a flowchart of another method for turning on a screen saver on a display device;

Fig. 6 exemplarily shows a flowchart of yet another method for opening a screen saver on a display device.

Detailed ways

In order to make the purpose, implementation and advantages of the application more clear, the application will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the application, rather than all the embodiments. . Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the appended claims of the present application.

It should be noted that the brief description of the terms in this application is only for the convenience of understanding the embodiments described below, and is not intended to limit the embodiments of this application. Unless otherwise stated, these terms should be understood according to their ordinary and usual meanings.

The term "user interface" in this application refers to a medium interface for interaction and information exchange between an application or operating system and a user. It realizes the conversion between the internal form of information and the form acceptable to the user. The commonly used form of user interface is a graphical user interface (graphic user interface, GUI), which refers to a user interface related to computer operations that is displayed in a graphical manner. It can be an icon, window, control and other interface elements displayed on the display of the display device. The control can include icons, buttons, menus, tabs, text boxes, dialog boxes, status bars, navigation bars, Widgets, etc. Visual interface elements.

FIG. 1A exemplarily shows a schematic diagram of an operation scene between the display device and the control device. As shown in FIG. 1A, the control device 100 and the display device 200 can communicate in a wired or wireless manner.

Among them, the control device 100 is configured to control the display device 200, which can receive operation instructions input by the user, and convert the operation instructions into instructions that the display device 200 can recognize and respond to, and act as an intermediary for the interaction between the user and the display device 200 effect. For example, the user operates the channel addition and subtraction keys on the control device 100, and the display device 200 responds to the channel addition and subtraction operations.

The control device 100 may be a remote controller 100A, including 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 can control the display device 200 by inputting user instructions through keys on the remote control, voice input, control panel input, etc. For example, the user can control the display device 200 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. Function.

The control device 100 may also be a smart device, such as a mobile terminal 100B, a tablet computer, a computer, a notebook computer, and the like. For example, an application program running on a smart device is used to control the display device 200. The application can be configured to provide users with various controls through an intuitive user interface (UI) on the screen associated with the smart device.

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

The display device 200 may provide a broadcast receiving function and a network TV function of a computer support function. The display device can be implemented as digital TV, Internet TV, Internet Protocol TV (IPTV), and so on.

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

The display device 200 also performs data communication with the server 300 through a variety of communication methods. Here, the display device 200 may be allowed to communicate 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 device 200. For example, the display device 200 can 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 server 300 can be one group or multiple groups, and can be one type or multiple types of servers. The server 300 provides other network service content such as video-on-demand and advertising services.

FIG. 1B exemplarily shows a configuration block diagram of the control device 100. As shown in FIG. 1B, the control device 100 includes a controller 110, a memory 120, a communicator 130, a user input interface 140, an 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 and operation of the control device 100, as well as the communication and cooperation between internal components, and external and internal data processing functions.

Exemplarily, when an interaction of a user pressing a button arranged on the remote control 100A or an interaction of touching a touch panel arranged on the remote control 100A is detected, the controller 110 may control to generate a signal corresponding to the detected interaction, and This signal is sent to the display device 200.

The memory 120 is used to store various operating programs, data, and applications for driving and controlling the control device 100 under the control of the controller 110. The memory 120 can store various control signal instructions input by the user.

The communicator 130 realizes the communication of control signals and data signals with the display device 200 under the control of the controller 110. For example, the control device 100 sends a control signal (such as a touch signal or a button signal) to the display device 200 via the communicator 130, and the control device 100 can receive the signal sent 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, in the case of an infrared signal interface, the user input instruction needs to be converted into an infrared control signal according to the infrared control protocol, and sent to the display device 200 via the infrared sending module. For another example, in the case of a radio frequency signal interface, a user input instruction needs to be converted into a digital signal, which is then modulated according to the radio frequency control signal modulation protocol, and then sent to the display device 200 by the radio frequency sending terminal.

The user input interface 140 may include at least one of a microphone 141, a touch panel 142, a sensor 143, a button 144, etc., so that the user can input user instructions for controlling the display device 200 to the control device through voice, touch, gesture, pressing, etc. 100.

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

The power supply 160 is used to provide operating power support for each element of the control device 100 under the control of the controller 110. The form can be battery and related control circuit.

FIG. 1C exemplarily shows a block diagram of the hardware configuration of the display device 200. As shown in FIG. 1C, the display device 200 may include a tuner and 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, Audio processor 280, audio output interface 285, and power supply 290.

The tuner and demodulator 210, which receives broadcast television signals through wired or wireless means, can perform modulation and demodulation processing such as amplification, mixing and resonance, and is used to demodulate the television selected by the user from multiple wireless or cable broadcast television signals The audio and video signals carried in the frequency of the channel, as well as additional information (such as EPG data).

The tuner and demodulator 210 can be selected by the user and controlled by the controller 250 to respond to the frequency of the television channel selected by the user and the television signal carried by the frequency.

The tuner and demodulator 210 can receive signals in many ways according to different broadcasting formats of TV signals, such as terrestrial broadcasting, cable broadcasting, satellite broadcasting or Internet broadcasting; and according to different modulation types, it can be digital modulation or analog Modulation method; and according to different types of received TV signals, analog signals and digital signals can be demodulated.

In some other exemplary embodiments, the tuner 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 TV signal after modulation and demodulation, and is input to the display device 200 through the external device interface 240.

The communicator 220 is a component used to communicate with external devices or external servers according to various types of communication protocols. For example, the display device 200 may transmit content data to an external device connected via the communicator 220, or browse and download content data from an external device connected via the communicator 220. The communicator 220 may include a network communication protocol module such as a WIFI module 221, a Bluetooth module 222, and a wired Ethernet module 223 or a near field communication protocol module, so that the communicator 220 can receive the control signal of the control device 100 according to the control of the controller 250, and Realize the control signal as WIFI signal, Bluetooth signal, radio frequency signal, etc.

The detector 230 is a component of the display device 200 for collecting signals from the external environment or interacting 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 voice, such as a voice signal of a control instruction for the user to control the display device 200; or, it may collect environmental sounds used to identify the type of environmental scene to realize display The device 200 can adapt to environmental noise.

In some other exemplary embodiments, the detector 230 may also include an image collector 232, such as a camera, a camera, etc., which may be used to collect external environment scenes to adaptively change the display parameters of the display device 200; and to collect The attributes of the user or interactive gestures with the user to achieve the function of interaction between the display device and the user.

In some other exemplary embodiments, the detector 230 may further include a light receiver, which is used to collect the ambient light intensity to adapt to changes in display parameters of the display device 200 and so on.

In some other exemplary embodiments, the detector 230 may also include a temperature sensor. For example, by sensing the ambient temperature, the display device 200 may adaptively adjust the display color temperature of the image. Exemplarily, when the temperature is relatively high, the color temperature of the display device 200 can be adjusted to be colder; when the temperature is relatively low, the color temperature of the display device 200 can be adjusted to be warmer.

The external device interface 240 is a component that provides the controller 250 to control data transmission between the display device 200 and external devices. The external device interface 240 can be connected to external devices such as set-top boxes, game devices, notebook computers, etc. in a wired/wireless manner, and can receive external devices such as video signals (such as moving images), audio signals (such as music), and additional information (such as EPG). ) And other data.

Among them, the external device interface 240 may include: a high-definition multimedia interface (HDMI) terminal 241, a composite video blanking synchronization (CVBS) terminal 242, an analog or digital component terminal 243, a universal serial bus (USB) terminal 244, and a component (Component) Any one or more of terminals (not shown in the figure), red, green and blue (RGB) terminals (not shown in the figure), etc.

The controller 250 controls the work of the display device 200 and responds to user operations by running various software control programs (such as an operating system and various application programs) stored on the memory 260. For example, the controller can be implemented as a chip (System-on-a-Chip, SOC).

As shown in FIG. 1C, the controller 250 includes a random access memory (RAM) 251, a read only memory (ROM) 252, a graphics processor 253, a processor 254, a communication interface 255, and a communication bus 256. Among them, the RAM 251, the ROM 252, the graphics processor 253, and the processor 254 communication interface 255 are connected through a communication bus 256.

ROM252, used to store various system startup instructions. For example, when the power-on signal is received, the power of the display device 200 starts to start, and the processor 254 runs the system startup instruction in the ROM 252, and copies the operating system stored in the memory 260 to the RAM 251 to start the operating system. After the operating system is started, the processor 254 copies various application programs in the memory 260 to the RAM 251, and then starts to run and start various application programs.

The graphics processor 253 is used to generate various graphics objects, such as icons, operation menus, and user input instructions to display graphics. The graphics processor 253 may include an arithmetic unit, which is used to perform operations by receiving various interactive instructions input by the user, and then display various objects according to the display attributes; and a renderer, which is used to generate various objects obtained based on the arithmetic unit, and perform The rendered result is displayed on the display 275.

The processor 254 is configured to execute operating system and application program instructions stored in the memory 260. And according to the received user input instructions, to execute various applications, data and content processing, so as to finally display and play various audio and video content.

In some exemplary embodiments, the processor 254 may include multiple processors. The multiple processors may include a main processor and multiple or one sub-processors. The main processor is configured to perform some initialization operations of the display device 200 in the display device preloading mode, and/or, to display screen operations in the normal mode. Multiple or one sub-processor, used to perform an operation in the standby mode of the display device.

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

The controller 250 may control the overall operation of the display device 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. For example, the controller can be implemented as an SOC (System on Chip) or an MCU (Micro Control Unit, Micro Control Unit).

Among them, the object can be any one of the selectable objects, such as a hyperlink or an icon. The operation related to the selected object, for example, the operation of displaying the page, document, image, etc. connected to the hyperlink, or the operation of executing the program corresponding to the object. The user input command for selecting the GUI object may be a command input through various input devices (for example, a mouse, a keyboard, a touch pad, etc.) connected to the display device 200 or a voice command corresponding to a voice spoken by the user.

The memory 260 is used to store various types of data, software programs or application programs for driving and controlling the operation of the display device 200. The memory 260 may include volatile and/or non-volatile memory. The term “memory” includes the memory 260, the RAM 251 and ROM 252 of the controller 250, or the memory card in the display device 200.

In some embodiments, the memory 260 is specifically used to store the operating program that drives the controller 250 in the display device 200; to store various application programs built in the display device 200 and downloaded from external devices by the user; and to store the configuration provided by the display 275 Data such as various GUIs, various objects related to the GUI, and visual effect images of the selector used to select GUI objects.

In some embodiments, the memory 260 is specifically used to store drivers and related data of the tuner and demodulator 210, the communicator 220, the detector 230, the external device interface 240, the video processor 270, the display 275, the audio processor 280, etc. For example, external data (such as audio and video data) received from an external device interface or user data (such as key information, voice information, touch information, etc.) received from a user interface.

In some embodiments, the memory 260 specifically stores software and/or programs for representing an operating system (OS). These software and/or programs may include, for example, a kernel, middleware, application programming interface (API), and/or application. Exemplarily, the kernel can control or manage system resources and functions implemented by other programs (such as the middleware, API, or application program); at the same time, the kernel can provide interfaces to allow middleware, API, or application program access control To control or manage system resources.

FIG. 1D exemplarily shows a block diagram of the architecture configuration of the operating system in the memory of the display device 200. The operating system architecture consists of the application layer, the middleware layer, and the kernel layer from top to bottom.

Application layer, system built-in applications and non-system-level applications belong to the application layer. Responsible for direct interaction with users. The application layer can include multiple applications, such as settings applications, e-post applications, media center applications, and so on. These applications can be implemented as web applications, which are executed based on the WebKit engine, and specifically can be developed and executed based on HTML5, Cascading Style Sheets (CSS) and JavaScript.

Here, HTML, the full name of HyperText Markup Language (HyperText Markup Language), is a standard markup language used to create web pages. Web pages are described through markup tags. HTML tags are used to describe text, graphics, animations, sounds, tables, For links, the browser will read the HTML document, explain the content of the tags in the document, and display it in the form of a web page.

CSS, the full name of Cascading Style Sheets (Cascading Style Sheets), is a computer language used to express the style of HTML files, and can be used to define style structures, such as fonts, colors, and positions. CSS styles can be directly stored in HTML web pages or in separate style files to achieve control over styles in web pages.

JavaScript is a language used in web page programming, which can be inserted into HTML pages and interpreted and executed by the browser. The interaction logic of the web application is implemented through JavaScript. JavaScript can encapsulate the JavaScript extension interface through the browser to realize 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 can be implemented as the Multimedia and Hypermedia Information Coding Expert Group (MHEG) of middleware related to data broadcasting, and can also be implemented as DLNA middleware of middleware related to external device communication, and can also be implemented as providing Display the middleware of the browser environment in which each application in the device runs.

The kernel layer provides core system services, such as file management, memory management, process management, network management, system security authority management and other services. The kernel layer can 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: providing display drivers for displays, camera drivers for cameras, button drivers for remote controls, and WIFI modules Provide WiFi driver, audio driver for audio output interface, power management driver for power management (PM) module, etc.

The user interface 265 receives various user interactions. Specifically, it is used to send the input signal of the user to the controller 250, or to transmit the output signal from the controller 250 to the user. Exemplarily, the remote control 100A may send input signals such as a power switch signal, a channel selection signal, and a volume adjustment signal input by the user to the user interface 265, and then the user interface 265 transfers to the controller 250; or the remote control 100A may Receive output signals such as audio, video, or data output from the user interface 265 after the controller 250 processes, and display the received output signal or output the received output signal as audio or vibration.

In some embodiments, the user may input a user command on a graphical user interface (GUI) displayed on the display 275, and the user interface 265 receives the user input command through the GUI. Specifically, the user interface 265 may receive user input commands for controlling the position of the selector in the GUI to select different objects or items.

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

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

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

Among them, the demultiplexing module is used to demultiplex the input audio and video data stream, such as the input MPEG-2 stream (based on the compression standard of digital storage media moving images and voice), then the demultiplexing module will demultiplex it Multiplexed into video signals and audio signals, etc.

The video decoding module is used to process the demultiplexed video signal, including decoding and scaling.

An image synthesis module, such as an image synthesizer, is used to superimpose and mix the GUI signal generated by the graphics generator with the zoomed video image according to the user input or itself, so as to generate an image signal for display.

The frame rate conversion module is used to convert the frame rate of the input video, such as converting the frame rate of the input 60Hz video to a frame rate of 120Hz or 240Hz, and the usual format is realized by such as frame interpolation.

The display formatting module is used to change the signal output by the frame rate conversion module to a signal conforming to the display format such as a display, for example, format the signal output by the frame rate conversion module to output RGB data signals.

The display 275 is used to receive the image signal input from the video processor 270 to display video content, images, and a menu control interface. The displayed video content can be from the video content in the broadcast signal received by the tuner and demodulator 210, or from the video content input by the communicator 220 or the external device interface 240. The display 275 simultaneously displays a user manipulation interface UI generated in the display device 200 and used to control the display device 200.

And, the display 275 may include a display screen component for presenting a picture and a driving component for driving image display. Alternatively, if the display 275 is a projection display, it may also include a projection device and a projection screen.

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

Exemplarily, the audio processor 280 may support various audio formats. Such as MPEG-2, MPEG-4, Advanced Audio Coding (AAC), High Efficiency AAC (HE-AAC) and other formats.

The audio output interface 285 is used to receive the audio signal output by the audio processor 280 under the control of the controller 250. The audio output interface 285 may include a speaker 286, or output to an external audio output terminal 287 of a generator of an external device, such as a headset Output terminal.

In some other exemplary embodiments, the video processor 270 may include one or more chips. The audio processor 280 may also include one or more chips.

And, in some 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.

The power supply 290 is used to provide power supply support for the display device 200 with power input from an external power supply under the control of the controller 250. The power supply 290 may be a built-in power supply circuit installed inside the display device 200, or may be a power supply installed outside the display device 200.

It should be noted that when the display device adopts an OLED display, due to the defect of "burn-in" in the OLED display, "after-images" will appear. In order to avoid the appearance of "after-imaging", to achieve the purpose of prolonging the service life of the display. In the embodiment of the present application, when it is recognized that the display interface of the display device has not changed for a long time, the display is controlled to display a screen saver. The display of the screen saver can avoid the problem that the display plays a still picture for a long time and shortens the service life of the display.

As shown in a schematic diagram of a GUI shown in FIG. 2, if the display interface 41 has not changed for a long time, the display is controlled to display a screen saver. For example, as shown in FIG. 3, a schematic diagram of a GUI includes a screen saver 42.

When the user needs to make the display device exit the screen saver, he can input through any key on the control device to trigger an instruction to terminate the display of the screen saver, and control the display to no longer display the screen saver. At the same time, the display screen displays the display interface before the screen saver appears. For example, when the user presses the volume + button on the control device to input an instruction to increase the volume, the display can change from displaying the GUI shown in Figure 3 to the one shown in Figure 2. GUI.

This application provides a method for turning on the screen protection of a display device. In the embodiment of this application, the chip driver layer processes the image brightness information, and can simultaneously cover the VIDEO layer and the OSD layer (UI, the homepage of the Netflix application, etc., are all OSDs). Layer, layered interface), and does not rely on the static/playing status of the multimedia player (local multimedia U disk or Netflix and other APP applications) or decoder (TV/HDMI and other resources), nor does it rely on the UI The status of this program covers a wide range of working conditions.

The method, as shown in Figure 4, includes:

S100. Acquire multiple partition images corresponding to the to-be-displayed image to be displayed on the display.

Taking a 4K display as an example, the user interface includes 3840*2160 pixels, which can be divided into 64 (row) * 36 (column) subarea images. At this time, each subarea image is a pixel block of 60*60 pixels; it can also be divided into 128 (Column)*72 (row) subarea images, at this time, each subarea image is a pixel block of 30*30 pixels. In the embodiment of the present application, there is no restriction on how to divide the display. Of course, the smaller the area of the divided image, the more accurate the judgment on whether the display interface has not changed for a long time.

S200: Determine the brightness information of each of the subregional images according to the gray value of each pixel in each of the subregional images.

Specifically, if the acquired pixel data is an RGB signal, first convert it into a grayscale value, and then perform other calculations.

In some embodiments, the brightness information of the partition image is obtained in the following manner: the average grayscale value of all pixels in the partition image, or the maximum grayscale value of all pixels, or the mean square of the grayscale values of all pixels root. In the embodiments of the present application, the method of calculating the average gray scale value has better immunity to interference than the method of taking the maximum value, and has higher efficiency than the root mean square method. In some embodiments, the method of calculating the average gray scale value Value method to determine the image brightness information of the partition image.

S300: For each of the partition images, determine whether the time period during which the brightness information of the partition image of the preset ratio has not changed exceeds the preset time period.

S400: When it is determined that the time period during which the brightness information of the partition image of the preset ratio has not changed exceeds the preset time period, control the display to display a screen saver.

Specifically, in the embodiment of the present application, multiple partition images corresponding to the image to be displayed to be displayed on the display are acquired at regular intervals, and the brightness information of the partition images is calculated. If the brightness information of the partition image of the preset ratio has not changed When the duration exceeds the preset duration, the display is controlled to display the screen saver. In the embodiment of the present application, the preset duration may be 2 minutes, and the interval time may be 5 seconds. If it does not exceed the preset time period, repeatedly execute acquiring multiple partition images corresponding to the to-be-displayed image to be displayed on the display.

As shown in FIG. 5, the specific steps of the method for determining the time period during which the brightness information of the partition image of the preset ratio has not changed include:

S301: Count the number of partition images of the brightness information of the current partition image and the brightness information of each partition image calculated last time.

S302: Determine whether the ratio of the number of partition images that have not changed in brightness information to the total partition images reaches a preset ratio.

S303. If the preset ratio is reached, the accumulator accumulates for 5 seconds, and then repeatedly executes to acquire multiple partition images corresponding to the to-be-displayed image to be displayed on the display. When the time length recorded by the accumulator is 2min, the control monitor displays the screen saver.

S304. If the preset ratio is not reached, the accumulator is cleared.

In some embodiments, the preset ratio is 90%-95%. It should be noted that the preset ratio can be set according to needs, because the display device can be applied to different scenes, and the preset ratio settings are different in different scenes. For example, the background of the KTV lyrics mode is a constant picture, only the lyrics change , In order to avoid the phenomenon of burning screen, the preset ratio can be set to 90%-95%.

In some embodiments, the screen saver is to automatically play a group of pictures or videos in a certain period of time. In order to avoid "burning screen", control the monitor to display the screen saver. The screen saver can make the display interface continue to change, thereby avoiding the situation that the display interface has not changed for a long time and the service life of the display is shortened.

S500. In some embodiments, determine whether a user input is detected.

S600. When a user input is detected, control the display to exit the screen saver. Specifically, when the user needs to use the display to watch other content, the screen saver can be terminated. The user can input an instruction to terminate the display of the screen saver through the keys on the control device, and control the display to exit the screen saver.

In the embodiment of the present application, the partition image can be obtained in two ways, including the partition image obtained by direct segmentation in the first way mentioned above;

Another second method is to first divide the user interface into small partition images, then combine the small partition images in rows or columns to obtain a large partition image, and determine the large partition image as a partition image. Specifically, the display interface is divided to obtain multiple small partition images. For example, a pixel block of 60*60 pixels may be used as the small partition image. In some embodiments, the small subarea images are combined in rows to obtain subarea images.

Taking a 4K display as an example, the display interface is first divided into 64 (row) * 36 (column) small partition images, the small partition image is a 60*60 pixel pixel block, then the small partition image of each row , Combine the component images to obtain 64 partition images, each of which is a pixel block of 3840*60 pixels.

In some embodiments, the small partition images are combined according to columns to obtain the partition image. Also, taking a 4k display as an example, the display interface is first divided into 64 (rows) * 36 (columns) small partition images. The image is a pixel block of 60*60 pixels. At this time, the small subarea images of each column are combined into a subarea image to obtain 36 subarea images, and each subarea image is a pixel block of 60*2160 pixels.

In addition, in addition to combining small partition images in rows or columns to obtain partition images, small partition images can also be combined in other forms, for example, the display interface is finally divided into 6 (rows) * 6 (columns) through the combination, a total of 36 Partition image.

For example, when the subarea image is a large subarea image, the specific steps of the method for determining the time period during which the brightness information of the preset ratio of the subarea image has not changed, as shown in FIG. 6, include:

S305: Determine the brightness information of the small subarea image according to the gray value of each pixel in the small subarea image.

S306: If the brightness information of the small partition image changes, determine that the brightness information of the corresponding large partition image changes.

S307: Count the number of images of the large partitions with changes in brightness information.

S308: Determine whether the ratio of the number of large-area images with changes in brightness information to the total number of large-area images reaches a preset ratio.

S309. If the ratio of the number of large-region images with brightness information changes to the total number of large-region images reaches the preset ratio, the accumulator is increased by 5s, and then the multiple regions corresponding to the to-be-displayed image to be displayed on the display are repeatedly executed. image. When the time length recorded by the accumulator is 2min, the control monitor displays the screen saver.

S310. If the preset ratio is not reached, the accumulator is cleared.

For the convenience of explanation, the above description has been made in conjunction with specific embodiments. However, the above exemplary discussion is not intended to be exhaustive or to limit the implementation to the specific form disclosed above. According to the above teaching, various modifications and variations can be obtained. The selection and description of the foregoing embodiments are for better explaining the principles and practical applications, so that those skilled in the art can better use the embodiments and various modified embodiments suitable for specific use considerations.

Claims

A display device, characterized in that it comprises:

monitor;

User interface, used to receive instructions entered by the user;

Controller, used to execute:

Acquiring multiple subarea images corresponding to the image to be displayed to be displayed on the display, and determining the brightness information of each subarea image according to the gray value of each pixel in each of the subarea images;

For each of the partition images, when it is determined that the time period during which the brightness information of the partition image of the preset ratio has not changed exceeds the preset time period, the display is controlled to display a screen saver.
The display device according to claim 1, wherein when a user input is detected, the display is controlled to exit the screen saver.
The display device according to claim 1, wherein the screen saver is to automatically play a group of pictures or videos in a certain period of time.
The display device according to claim 1, wherein the preset ratio is 90%-95%.
The display device according to claim 1, wherein the brightness information of the partition image is obtained by the following method: the average gray scale value of all pixels in the partition image, or the maximum gray scale value of all pixels, or The root mean square of the grayscale values of all pixels.
A method for opening a screen saver on a display device, which is characterized in that it includes:

Acquiring multiple subarea images corresponding to the image to be displayed to be displayed on the display, and determining the brightness information of each subarea image according to the gray value of each pixel in each of the subarea images;

For each of the partition images, when it is determined that the time period during which the brightness information of the partition image of the preset ratio has not changed exceeds the preset time period, the display is controlled to display a screen saver.
The method according to claim 6, wherein when a user input is detected, the display is controlled to exit the screen saver.
The method according to claim 6, wherein the preset ratio is 90%-95%.
The method according to claim 6, wherein the screen saver is to automatically play a group of pictures or videos according to a certain length of time.
The method according to claim 6, wherein the brightness information of the partition image is obtained by the following method: the average grayscale value of all pixels in the partition image, or the maximum grayscale value of all pixels, or all The root mean square of the pixel grayscale value.