Display device and video signal display method

Abstract

The invention discloses a display device and a video signal display method. The display device comprises a display; the controller is in communication connection with the display and is configured to extract resolution information of the current video signal according to the decoded video signal; when the resolution represented by the resolution information is smaller than a preset resolution, preprocessing the video signal to obtain a standard video signal, and controlling a logic board of the display to be adjusted to a multiplying mode so as to output the standard video signal; and when the resolution represented by the resolution information is greater than or equal to a preset resolution, preprocessing the video signal to obtain a standard video signal, and controlling a logic board of the display to be adjusted to a common mode so as to output the standard video signal. According to the invention, the output mode of the display can be dynamically switched according to the resolution of the video signal, the smooth display frame of the low-resolution video signal is ensured, the problem that the definition of the high-resolution video signal is reduced is avoided, and the user experience is improved.

Description

[0001] This application is a divisional application. The original application has the application number 202210300961.9 and the original application date is March 24, 2022. The entire contents of the original application are incorporated herein by reference. Technical Field

[0002] This application relates to the field of display technology, and in particular to a display device and a video signal display method. Background Technology

[0003] A display device is a television product that enables two-way human-computer interaction and integrates multiple functions such as audio-visual, entertainment, and data. To meet diverse user needs, display devices are equipped with various applications such as audio-visual and entertainment, interacting and exchanging information with users through a user interface.

[0004] With the development of the television display industry, people's demands for audio-visual experience are constantly increasing. 4K monitors now account for the vast majority of the market. A 4K monitor refers to a display device with 4K resolution. For 4K monitors, the refresh rate is generally 50Hz or 60Hz. When the resolution of the video signal displayed on the display device is relatively low, the clarity of the video signal itself is slightly lower. If there are moving images in the video signal, the low refresh rate will cause the image to flicker, resulting in a poor user experience. Summary of the Invention

[0005] This application provides a display device and a video signal display method to solve the technical problem in the prior art where low-resolution video signals cause screen jitter due to low refresh rate.

[0006] To address the aforementioned technical problems, the embodiments of this application disclose the following technical solutions: In a first aspect, embodiments of this application disclose a display device, the display device comprising: monitor; The controller, which is communicatively connected to the display, is configured to: Extract the resolution information of the current video signal based on the decoded video signal; When the resolution represented by the resolution information is less than the preset resolution, the video signal is preprocessed to obtain a standard video signal, and the logic board of the display is controlled to adjust to the double line mode so that the display outputs the standard video signal in the double line mode. The double line mode refers to the mode of doubling the refresh rate by doubling the scan lines. When the resolution represented by the resolution information is greater than or equal to the preset resolution, the video signal is preprocessed to obtain a standard video signal, and the logic board of the display is controlled to adjust to the normal mode so that the display outputs the standard video signal in the normal mode, wherein the number of scan lines in the field direction in the normal mode is the same as the number of vertical pixels in the video signal.

[0007] Secondly, embodiments of this application disclose a video signal display method, the video signal display method comprising: Extract the resolution information of the current video signal based on the decoded video signal; When the resolution represented by the resolution information is less than the preset resolution, the video signal is preprocessed to obtain a standard video signal, and the logic board of the display is controlled to adjust to the double line mode so that the display outputs the standard video signal in the double line mode. The double line mode refers to the mode of doubling the refresh rate by doubling the scan lines. When the resolution represented by the resolution information is greater than or equal to the preset resolution, the video signal is preprocessed to obtain a standard video signal, and the logic board of the display is controlled to adjust to the normal mode so that the display outputs the standard video signal in the normal mode, wherein the number of scan lines in the field direction in the normal mode is the same as the number of vertical pixels in the video signal.

[0008] Compared with the prior art, the beneficial effects of this application are as follows: This application provides a display device and a video signal display method. When the display device receives a video signal, it decodes it and extracts the resolution information of the video signal from the decoded video signal. The display device confirms the resolution information of the current video signal. If the resolution information of the current video signal is less than a preset resolution, the display device controls the display's logic board to adjust to double line mode during preprocessing of the video signal. In double line mode, the scan lines are doubled, the scanning efficiency is improved, and the number of frames scanned per second increases, thus doubling the refresh rate and preventing jitter in moving images. For video signals with a resolution greater than or equal to the preset resolution, if the display device adjusts the display's logic board to double line mode, the image content in the field direction will be lost by half, resulting in a decrease in clarity. To avoid this, the display device controls the display's logic board to adjust to normal mode during preprocessing of the video signal, outputting the higher-resolution video signal in normal mode. This application can dynamically switch the display's output mode according to the resolution of the video signal, ensuring smooth display of lower-resolution video signals and avoiding the problem of decreased clarity of higher-resolution video signals, thereby improving the user experience.

[0009] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0010] To more clearly illustrate the technical solution of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0011] Figure 1 The diagram illustrates an operational scenario between a display device and a control device according to some embodiments; Figure 2 The diagram illustrates, by way of example, a hardware configuration block diagram of a control device 100 according to some embodiments; Figure 3 The diagram illustrates, by way of example, a hardware configuration block diagram of a display device 200 according to some embodiments; Figure 4 The diagram illustrates, by way of example, a software configuration schematic of a display device 200 according to some embodiments; Figure 5 The diagram illustrates a flowchart of a video signal display method according to some embodiments; Figure 6 The diagram illustrates, by way of example, a processing flow diagram of a low-resolution video signal according to some embodiments; Figure 7 The diagram illustrates, by way of example, a processing flow diagram of a high-resolution video signal according to some embodiments; Figure 8 The diagram above illustrates another flow chart of a video signal display method according to some embodiments. Detailed Implementation

[0012] To make the objectives and implementation methods of this application clearer, the exemplary implementation methods of this application will be clearly and completely described below with reference to the accompanying drawings of the exemplary embodiments of this application. Obviously, the exemplary embodiments described are only some embodiments of this application, and not all embodiments.

[0013] It should be noted that the brief descriptions of terms in this application are only for the convenience of understanding the embodiments described below, and are not intended to limit the embodiments of this application. Unless otherwise stated, these terms should be understood in their ordinary and common meaning.

[0014] The terms "first," "second," "third," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar or related objects or entities, and do not necessarily imply a specific order or sequence, unless otherwise specified. It should be understood that such terms are interchangeable where appropriate.

[0015] The terms “comprising” and “having”, and any variations thereof, are intended to cover but not exclude inclusion, for example, a product or device that includes a range of components is not necessarily limited to all of the components that are clearly listed, but may include other components that are not clearly listed or that are inherent to such product or device.

[0016] The term "module" refers to any known or subsequently developed hardware, software, firmware, artificial intelligence, fuzzy logic, or combination of hardware and / or software code that is capable of performing the functions associated with that element.

[0017] Figure 1 This is a schematic diagram illustrating the operational scenario between the display device and the control unit according to the embodiment. Figure 1 As shown, the user can operate the display device 200 through the smart device 300 or the control device 100.

[0018] In some embodiments, the control device 100 may be a remote control. Communication between the remote control and the display device includes infrared protocol communication, Bluetooth protocol communication, and other short-range communication methods, controlling the display device 200 wirelessly or via wired means. Users can control the display device 200 by inputting user commands through buttons on the remote control, voice input, control panel input, etc.

[0019] In some embodiments, a smart device 300 (such as a mobile terminal, tablet computer, computer, laptop computer, etc.) may also be used to control the display device 200. For example, an application running on the smart device may be used to control the display device 200.

[0020] In some embodiments, the display device 200 can also be controlled in ways other than the control device 100 and the smart device 300. For example, it can be controlled by directly receiving the user's voice commands through a module configured inside the display device 200 for acquiring voice commands, or it can be controlled by receiving the user's voice commands through a voice control device set outside the display device 200.

[0021] In some embodiments, the display device 200 also communicates with the server 400. The display device 200 may communicate via a local area network (LAN), wireless local area network (WLAN), and other networks. The server 400 may provide various content and interactive features to the display device 200. The server 400 may be a cluster or multiple clusters, and may include one or more types of servers.

[0022] Figure 2 An exemplary block diagram of the configuration of the control device 100 according to an exemplary embodiment is shown. Figure 2 As shown, the control device 100 includes a controller 110, a communication interface 130, a user input / output interface 140, a memory, and a power supply. The control device 100 can receive user input operation commands and convert the operation commands into commands that the display device 200 can recognize and respond to, thus acting as an intermediary for interaction between the user and the display device 200.

[0023] Figure 3 A hardware configuration block diagram of a display device 200 according to an exemplary embodiment is shown.

[0024] In some embodiments, the display device 200 includes at least one of a tuner 210, a communicator 220, a detector 230, an external device interface 240, a controller 250, a display 260, an audio output interface 270, a memory, a power supply, and a user interface.

[0025] In some embodiments, the controller includes a processor, a video processor, an audio processor, a graphics processor, RAM, ROM, and a first interface to an nth interface for input / output.

[0026] In some embodiments, the display 260 includes a display screen component for presenting an image, a driving component for driving image display, a component for receiving image signals from the controller output, and a user control UI interface for displaying video content, image content, menu control interface, and user control UI interface.

[0027] In some embodiments, the display 260 may be a liquid crystal display, an OLED display, or a projection display, and may also be a projection device and a projection screen.

[0028] In some embodiments, the communicator 220 is a component used to communicate with external devices or servers according to various communication protocol types. For example, the communicator may include at least one of a Wi-Fi module, a Bluetooth module, a wired Ethernet module, other network communication protocol chips or near-field communication protocol chips, and an infrared receiver. The display device 200 can establish the transmission and reception of control signals and data signals with the external control device 100 or the server 400 through the communicator 220.

[0029] In some embodiments, the user interface can be used to receive control signals from the control device 100 (e.g., an infrared remote control).

[0030] In some embodiments, detector 230 is used to acquire signals from the external environment or to interact with the outside world. For example, detector 230 includes a light receiver, a sensor for acquiring ambient light intensity; or, detector 230 includes an image acquisition device, such as a camera, which can be used to acquire external environmental scenes, user attributes, or user interaction gestures; or, detector 230 includes a sound acquisition device, such as a microphone, for receiving external sounds.

[0031] In some embodiments, the external device interface 240 may include, but is not limited to, one or more of the following interfaces: High Definition Multimedia Interface (HDMI), analog or data high-definition component input interface (component), composite video input interface (CVBS), USB input interface (USB), RGB port, etc. It may also be a composite input / output interface formed by multiple interfaces mentioned above.

[0032] In some embodiments, the tuner 210 receives broadcast television signals via wired or wireless reception and demodulates audio and video signals, such as EPG data signals, from a plurality of wireless or wired broadcast television signals.

[0033] In some embodiments, the controller 250 and the tuner 210 may be located in different separate devices, that is, the tuner 210 may also be located in an external device of the main device where the controller 250 is located, such as an external set-top box.

[0034] In some embodiments, the controller 250 controls the operation of the display device and responds to user operations via various software control programs stored in memory. The controller 250 controls the overall operation of the display device 200. For example, in response to receiving a user command to select a UI object to display on the display 260, the controller 250 can perform operations related to the object selected by the user command.

[0035] In some embodiments, the object can be any of the optional objects, such as a hyperlink, an icon, or other operable controls. Operations related to the selected object include: displaying links to hyperlinked pages, documents, images, etc., or performing operations corresponding to the program associated with the icon.

[0036] In some embodiments, the controller includes at least one of a central processing unit (CPU), a video processor, an audio processor, a graphics processing unit (GPU), RAM (random access memory), ROM (read-only memory), a first to an nth interface for input / output, a communication bus, etc.

[0037] A CPU (CPU) processor is used to execute operating system and application instructions stored in memory, as well as various interactive instructions received from external input, to execute various applications, data, and content, ultimately for the display and playback of various audio and video content. A CPU processor can include multiple processors, such as a main processor and one or more sub-processors.

[0038] In some embodiments, a graphics processor is used to generate various graphical objects, such as icons, operation menus, and graphics displayed based on user input commands. The graphics processor includes an arithmetic logic unit (ALU) that performs calculations based on various user-input interactive commands and displays various objects according to display attributes; it also includes a renderer that renders the various objects obtained from the ALU, and the rendered objects are used to display on a monitor.

[0039] In some embodiments, the video processor is configured to receive external video signals and perform video processing such as decompression, decoding, scaling, noise reduction, frame rate conversion, resolution conversion, and image synthesis according to the standard encoding and decoding protocol of the input signals, so as to obtain a signal that can be directly displayed or played on the display device 200.

[0040] In some embodiments, the video processor includes a demultiplexing module, a video decoding module, an image compositing module, a frame rate conversion module, and a display formatting module. The demultiplexing module demultiplexes the input audio and video data streams. The video decoding module processes the demultiplexed video signal, including decoding and scaling. The image compositing module, such as an image synthesizer, overlays and blends a GUI signal generated by a graphics generator based on user input or its own generation with the scaled video image to generate a displayable image signal. The frame rate conversion module converts the input video frame rate. The display formatting module modifies the received frame rate-converted video output signal to conform to a display format, such as outputting RGB data signals.

[0041] In some embodiments, the audio processor is configured to receive external audio signals, and according to the standard codec protocol of the input signals, perform decompression and decoding, as well as noise reduction, digital-to-analog conversion, and amplification processing, to obtain a sound signal that can be played in a speaker.

[0042] In some embodiments, the user can input user commands through a graphical user interface (GUI) displayed on the display 260, and the user input interface receives the user input commands through the graphical user interface (GUI). Alternatively, the user can input user commands by inputting specific sounds or gestures, and the user input interface receives the user input commands by recognizing the sounds or gestures through sensors.

[0043] In some embodiments, a "user interface" is the medium through which an application or operating system interacts and exchanges information with a user, converting information between its internal form and a form acceptable to the user. A common form of user interface is the graphical user interface (GUI), which refers to a user interface related to computer operation displayed graphically. It can be an icon, window, control, or other interface element displayed on the screen of an electronic device. Controls can include visual interface elements such as icons, buttons, menus, tabs, text boxes, dialog boxes, status bars, navigation bars, and widgets.

[0044] In some embodiments, the display device's system may include a kernel, a command interpreter (shell), a file system, and applications. The kernel, shell, and file system together form the basic operating system structure, allowing users to manage files, run programs, and use the system. Upon power-up, the kernel starts, activates the kernel space, abstracts hardware, initializes hardware parameters, and runs and maintains virtual memory, the scheduler, signals, and inter-process communication (IPC). After the kernel starts, the shell and user applications are loaded. Applications are compiled into machine code after startup, forming a process.

[0045] See Figure 4 In some embodiments, the system is divided into four layers, from top to bottom: the Applications layer (referred to as the "Application Layer"), the Application Framework layer (referred to as the "Framework Layer"), the Android runtime and system library layer (referred to as the "System Runtime Layer"), and the kernel layer.

[0046] In some embodiments, at least one application runs in the application layer. These applications may be Windows programs, system settings programs, or clock programs that come with the operating system; they may also be applications developed by third-party developers. In specific implementations, the application packages in the application layer are not limited to the examples above.

[0047] The framework layer provides application programming interfaces (APIs) and a programming framework for applications. The application framework layer includes predefined functions. It acts as a central processing unit, determining the actions taken by applications within the application layer. Through the API, applications can access system resources and obtain system services during execution.

[0048] like Figure 4 As shown, the application framework layer in this embodiment includes managers, content providers, etc., wherein the managers include at least one of the following modules: ActivityManager, which interacts with all activities running in the system; LocationManager, which provides access to system location services for system services or applications; PackageManager, which retrieves various information related to application packages currently installed on the device; NotificationManager, which controls the display and clearing of notification messages; and WindowManager, which manages icons, windows, toolbars, wallpapers, and desktop widgets on the user interface.

[0049] In some embodiments, the Activity Manager manages the lifecycle of individual applications and common navigation and back functions, such as controlling application exit, opening, and back actions. The Window Manager manages all window programs, such as obtaining the screen size, determining if a status bar is present, locking the screen, capturing the screen, and controlling display window changes (e.g., shrinking the display window, shaking the display, distorting the display, etc.).

[0050] In some embodiments, the system runtime library layer provides support for the upper layer, namely the framework layer. When the framework layer is used, the Android operating system runs the C / C++ libraries contained in the system runtime library layer to implement the functions that the framework layer needs to perform.

[0051] In some embodiments, the kernel layer is a layer between hardware and software. For example... Figure 4As shown, the kernel layer includes at least one of the following drivers: audio driver, display driver, Bluetooth driver, camera driver, WIFI driver, USB driver, HDMI driver, sensor driver (such as fingerprint sensor, temperature sensor, pressure sensor, etc.), and power driver.

[0052] In some embodiments, the hardware or software architecture can be based on the description in the above embodiments, and in some embodiments it can be based on other similar hardware or software architectures, as long as the technical solution of this application can be implemented.

[0053] Based on the aforementioned display device 200, display devices with 4K resolution are becoming increasingly common. For such devices, the refresh rate is typically 50Hz or 60Hz. When the resolution of the video signal displayed by the display device 200 is low, the inherent clarity of the video signal is slightly lower. If there are moving images in the video signal, the low refresh rate will cause screen flickering, resulting in a poor user experience. Currently, low-resolution video signals can be optimized using image quality chips such as MEMC to reduce flickering, but this significantly increases the cost of the display device. To address the above problems, this application provides a display device and a video signal display method in some embodiments. It should be noted that the display device in this application refers not only to smart TVs but also to computers, tablets, etc.

[0054] The video signal display process provided in the embodiments of this application will now be described with reference to the accompanying drawings.

[0055] Figure 5 The diagram illustrates a flowchart of a video signal display method according to some embodiments. In some embodiments, this application provides a display device 200 including a display 260 and a controller 250, the controller 250 being communicatively connected to the display 260, and the controller being configured to perform... Figure 5 The video signal display process in the video. Combined with... Figure 5 The video signal display process is as follows: S501: Extract the resolution information of the current video signal based on the decoded video signal.

[0056] In some embodiments, when the display device 200 receives an input video signal, it typically first decodes and decompresses the compressed video signal. Based on the decoded video signal, the display device 2200 can extract the resolution information of the video signal. Resolution determines the clarity of the video signal; the higher the resolution, the higher the clarity. Generally, the resolution of video signals typically includes standard definition and below. (HD), (Full HD) ( Ultra HD) ( Ultra HD, etc.

[0057] In some embodiments, the way resolution information is presented varies depending on the type of video signal. For example, the video signal type is typically a multimedia stream signal or an HDMI (High-Definition Multimedia Interface) signal. When the video signal is a multimedia stream signal, the display device 200 can read the resolution information based on the encapsulation or encoding information of the stream in the decoded multimedia stream signal. When the video signal is an HDMI signal, the display device 200 obtains the resolution information based on the TMDS data packet in the decoded HDMI signal. For example, the display device 200 queries the key named "resolution" in the TMDS data packet to obtain the corresponding value.

[0058] In some embodiments, the display device 200 is provided with a preset resolution, for example... The preset resolution is used as a threshold, and the resolution of the acquired current video signal is compared with the threshold so that the display device 200 makes different output responses according to video signals of different sizes and resolutions. That is, the display device 200 switches the normal mode and double line mode of the display 260 according to video signals of different sizes and resolutions.

[0059] Here, double-line mode refers to a mode that doubles the refresh rate by doubling the number of scan lines. Normal mode is the mode that scans image frames normally. The switching between double-line mode and normal mode is performed by the monitor's 260 logic board (TCON). The following section will explain... ( Taking a 60Hz video signal as an example, let's introduce the two modes.

[0060] When the monitor's 260 logic board is in normal mode, it scans image frames line by line, scanning a total of 2160 lines, which is 60 frames per second. After switching to double refresh rate mode, each frame scans two identical rows of pixels at a time. Therefore, each frame only needs to be scanned 1080 times, halving the scanning time and doubling the number of frames scanned per second to 120 frames per second. Thus, it can be seen that in the vertical direction, because reducing a 2K signal to 1K requires halving the original pixels, line dragging is necessary. For signals smaller than 1K, they need to be amplified to 1K, without line dragging. Therefore, in double refresh rate mode, for higher resolution video signals, the refresh rate doubles, but the content of each frame is halved in the vertical direction, resulting in a decrease in video signal clarity. In other words, double refresh rate mode has a greater impact on the clarity of higher resolution video signals (4K), but a smaller impact on the clarity of lower resolution video signals. Therefore, the display device 200 switches the display 260 between normal mode and double-line mode according to the video signal of different sizes and resolutions.

[0061] S502: When the resolution represented by the resolution information is less than the preset resolution, the video signal is preprocessed to obtain a standard video signal, and the logic board of the display is controlled to adjust to the double line mode so that the display outputs the standard video signal in the double line mode.

[0062] S503: When the resolution represented by the resolution information is greater than or equal to the preset resolution, the video signal is preprocessed to obtain a standard video signal, and the logic board of the display is controlled to adjust to the normal mode so that the display outputs the standard video signal in the normal mode.

[0063] In some embodiments, when the resolution of the current video signal acquired by the display device 200 is less than the preset resolution, the display device 200 may first process the video signal to obtain a standard video signal. After obtaining the standard video signal, the display device 200 sends a line-doubled state instruction to the logic board of the display 260 so that the logic board can start the line-doubled mode according to the line-doubled state instruction.

[0064] In some embodiments, when the resolution of the current video signal acquired by the display device 200 is greater than or equal to a preset resolution, the display device 200 may first process the video signal to obtain a standard video signal. After obtaining the standard video signal, the display device 200 sends a normal state command to the logic board of the display 260 so that the logic board can start the normal mode according to the normal state command.

[0065] In some embodiments, before controlling the logic board of the display 260 to adjust to double-line mode or normal mode, the display device 200 can first control the backlight power supply of the display 260 to turn off the backlight via GPIO (General-purpose input / output). After turning off the backlight, the temporary state of the display 260 caused by mode switching can be eliminated, thereby avoiding display interference that would degrade the user experience.

[0066] It should be noted that after the backlight is turned off, the display device 200 can first control the monitor 260 to switch modes, and then preprocess the video signal. Since the backlight is turned off and will not affect the displayed content, the order of monitor mode switching and video signal preprocessing is not limited here.

[0067] In some embodiments, after the logic board of the display is adjusted to double line mode or normal mode, the display device 200 needs to control the backlight power supply in the display 260 to turn on the backlight via GPIO.

[0068] In some embodiments, the content ultimately displayed by the display device 200 through the monitor 260 can be composed of a first layer and a second layer superimposed on each other. Here, the first layer is a graphics layer, which is equipped with an OSD (On-Screen Display Engine). Therefore, the first layer can also be called the OSD layer, and is used to display application interfaces, application menus, toolbars, and other content. The second layer is a video layer, which is displayed below the graphics layer and is generally used to display the screen content corresponding to the external signals connected to the display device.

[0069] In some embodiments, the original OSD size within the graphics layer of the display device 200 is typically [size missing]. To overlay the OSD from the graphics layer with the video signal in the video layer, the OSD from the graphics layer can first be stored in the memory allocated by the graphics rendering window (SurfaceFlinge), and then stored in the display framebuffer after scaling. The scaling process involves calculating the ratio of the original size of each row of pixels to the size of the target area, and then using a linear scaling algorithm to repeat each row of original pixels sequentially according to this ratio, thus converting it into the size of the target area.

[0070] Correspondingly, the display device 200 scales the decoded video signal in the video layer to a signal size consistent with the scaled screen display engine, and performs image quality processing. This image quality processing involves calculating the previous few frames of images and using image processing algorithms such as contour enhancement, skin tone correction, GAMMMA correction, and sharpness adjustment to improve the image quality of the original image and generate processed display image data.

[0071] Finally, the display device 200 mixes and overlays the graphics layer and the video layer to obtain a mixed image, encodes the mixed image to obtain a VBO (V-by-One) signal, and inputs the VBO signal to the display 260 so that the display 260 outputs the signal in a corresponding mode. When overlaying the two layers, since the two layers are the same size, each pixel in the graphics layer is multiplied by an opacity factor, and each pixel in the video layer is multiplied by (1 - opacity factor), and they are superimposed to form the mixed image data.

[0072] Figure 6 The diagram illustrates, exemplarily, a processing flow diagram of a low-resolution video signal according to some embodiments. Combined with... Figure 6 When the display device 200 receives signals below 4K2K, meaning the video signal in the video layer is a low-resolution signal, such as Full HD (FHD) or lower, it is scaled down to achieve the desired resolution. Then, image quality processing is performed on it. Correspondingly, the OSD is directly scaled to... In the display output area of ​​display device 200, the video layer and image layer are mixed and encoded into a VBO signal at 3840x1080 120Hz (corresponding to the original refresh rate of 60Hz) or 100Hz (corresponding to the original refresh rate of 50Hz) for output. The line doubling mode of the monitor logic board is enabled, and monitor 260 can output the video signal in... 120Hz double line output.

[0073] Figure 7 The diagram illustrates, by way of example, a processing flow diagram of a high-resolution video signal according to some embodiments. Figure 7 As shown, when the display device 200 receives a 4K2K or higher resolution signal, that is, the video signal in the video layer is a high-resolution signal, which is scaled to achieve a higher resolution. (Here, if the original video signal resolution is 4K2K, the original size can be kept unchanged), and image quality processing is performed on it. Correspondingly, the display device 200 scales the OSD to... In the display output area of ​​display device 200, the video layer and image layer are mixed and encoded into a VBO signal at 3840x2160 60Hz and output. The normal mode of the display logic board is enabled, and display 206 can output the video signal as... 60Hz output is normal.

[0074] In related technologies, when a 4K display device 200 receives a video signal, regardless of the video signal's resolution, it first amplifies the OSD to [resolution value]. If it is later discovered that the video signal resolution is low, then the OSD will be changed from... Shrink to .

[0075] In some embodiments, since the resolution of the received video signal is determined in advance, the resolution represented by the resolution information of the received video signal is less than a preset resolution. When the OSD is scaled to a certain size, the display device 200 can directly scale the OSD to the specified size. .

[0076] Similarly, the resolution represented by the resolution information of the received video signal is greater than or equal to the preset resolution. When the OSD is scaled to a certain size, the display device 200 can directly scale the OSD to the specified size. .

[0077] The following section, with reference to the accompanying diagram, further explains the process of video signal display.

[0078] Figure 8 The diagram illustrates another flow chart of a video signal display method according to some embodiments. Figure 8 As shown, the display device receives the input video signal and determines the current video signal format, i.e., confirms the resolution of the current video signal. If the resolution of the current video signal is greater than or equal to 4K2K, the display device 200 further determines whether the current mode of the monitor 260 is double-line mode. If not, it means that the mode of the monitor 260 is normal mode, and the display device 200 controls the monitor 260 to maintain the current mode. If it is, the display device 200 notifies the TCON to enter normal mode and simultaneously controls the backlight source to turn off. Subsequently, the display device 200 preprocesses the video signal, which can first enlarge the OSD in the graphics layer to... Then amplify the video signal in the video layer to After image quality processing, the contents of the two layers are finally converted to [image quality]. The 60Hz mixing and encoding are output as a VBO signal. At this time, the monitor's TCON disables the 4K1K double-line mode and operates in normal mode. The display device 200 controls the backlight source to turn on and controls the monitor to... The video signal is output at 60Hz. Additionally, if the resolution of the current video signal is less than 4K2K, the display device 200 further determines whether the current mode of the monitor 260 is in double-line mode. If so, it controls the monitor 260 to maintain the current mode. If not, the display device 200 notifies the TCON to enter 4K1K double-line mode and simultaneously controls the backlight source to turn off. Subsequently, the display device 200 preprocesses the video signal, which may first enlarge the OSD in the graphics layer to... Then amplify the video signal in the video layer to After image quality processing, the contents of the two layers are finally converted to [image quality]. The 120Hz mixing and encoding is output as a VBO signal. At this time, the monitor's TCON is set to 4K 1K double-line mode. The display device 200 controls the backlight source to turn on and controls the monitor to... Output video signal at 120Hz.

[0079] In this application, the display device outputs video signals with resolutions lower than a preset resolution in double-line mode. In double-line mode, the scan lines are doubled, increasing scanning efficiency and thus increasing the number of frames scanned per second, effectively doubling the refresh rate and preventing jitter in moving images. For video signals with resolutions greater than or equal to the preset resolution, the display is output in normal mode to avoid halving of the image content in the field direction and prevent a decrease in clarity. This application can dynamically switch the display's output mode according to the video signal resolution, ensuring smooth display of lower-resolution video signals while avoiding the problem of decreased clarity for higher-resolution video signals, thereby improving the user experience.

[0080] Based on the same inventive concept as the aforementioned display device, this application also provides a video signal display method, comprising: a display device 200 extracting resolution information of the current video signal based on the decoded video signal; when the resolution represented by the resolution information is less than a preset resolution, the display device 200 preprocesses the video signal to obtain a standard video signal, and controls the logic board of the display 260 to adjust to a double-line mode, so that the display 260 outputs the standard video signal in the double-line mode, wherein the double-line mode refers to a mode that doubles the refresh rate by doubling the scan lines; when the resolution represented by the resolution information is greater than or equal to the preset resolution, the video signal is preprocessed to obtain a standard video signal, and the logic board of the display 260 is controlled to adjust to a normal mode, so that the display 260 outputs the standard video signal in the normal mode.

[0081] In some embodiments, when preprocessing the video signal, the method includes: the display device 200 storing the screen display engine in the graphics layer into memory allocated by the graphics drawing window, and storing it in the display frame buffer after scaling. The display device 200 scaling the decoded video signal in the video layer to a signal of the same size as the scaled screen display engine, and performing image quality processing. The display device 200 mixing the graphics layer and the video layer to obtain a mixed image, and encoding the mixed image to obtain a VBO signal.

[0082] In some embodiments, during the scaling process of the screen display engine in the graphics layer, the method includes: when the resolution represented by the resolution information is less than... At that time, the display device 200 scales the screen display engine to The resolution represented by the resolution information is greater than or equal to... At that time, the display device 200 scales the screen display engine to .

[0083] Since the above embodiments are all described in conjunction with other methods, and different embodiments have the same parts, the same or similar parts between the various embodiments in this specification can be referred to mutually. They will not be described in detail here.

[0084] It should be noted that in this specification, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a circuit structure, article, or device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a circuit structure, article, or device. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the circuit structure, article, or device that includes the element.

[0085] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the disclosure herein. This application is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this application are indicated by the content of the claims.

[0086] The above embodiments of this application do not constitute a limitation on the scope of protection of this application.

Claims

1. A display device, characterized in that, The display device includes: monitor; The controller, which is communicatively connected to the display, is configured to: Extract the resolution information of the current video signal based on the decoded video signal; When the resolution represented by the resolution information is less than the preset resolution, the video signal is preprocessed to obtain a standard video signal, and the logic board of the display is controlled to adjust to the double line mode so that the display outputs the standard video signal in the double line mode. The double line mode refers to the mode of doubling the refresh rate by doubling the scan lines. When the resolution represented by the resolution information is greater than or equal to the preset resolution, the video signal is preprocessed to obtain a standard video signal, and the logic board of the display is controlled to adjust to the normal mode so that the display outputs the standard video signal in the normal mode.

2. The display device according to claim 1, characterized in that, In the step of preprocessing the video signal to obtain a standard video signal, the controller is further configured to: The screen display engine in the graphics layer is stored in the memory allocated by the graphics drawing window, and after scaling, it is stored in the display frame buffer. The decoded video signal in the video layer is scaled up to the same size as the scaled screen display engine, and then image quality processing is performed. The graphics layer and the video layer are mixed to obtain a mixed image, and the mixed image is encoded to obtain a VBO signal.

3. The display device according to claim 2, characterized in that, The preset resolution is During the scaling process of the screen display engine in the graphics layer, the controller is also configured to: The resolution represented by the resolution information is less than At that time, the screen display engine is scaled to ; The resolution represented by the resolution information is greater than or equal to At that time, the screen display engine is scaled to .

4. The display device according to claim 1, characterized in that, In the step of extracting the resolution information of the current video signal based on the decoded video signal, the controller is further configured to: When the video signal is a multimedia stream signal, the resolution information is read according to the encapsulation information or encoding information of the stream in the decoded multimedia stream signal; When the video signal is an HDMI signal, the resolution information is obtained based on the TMDS data packet in the decoded HDMI signal.

5. The display device according to claim 1, characterized in that, In the step of adjusting the logic board of the display to double line mode, the controller is further configured to: A line-double status command is sent to the logic board of the display so that the logic board can activate the line-double mode according to the line-double status command.

6. The display device according to claim 1, characterized in that, Before the logic board controlling the display is adjusted to double line mode or normal mode, the controller is also configured to: The backlight in the display is turned off by controlling the backlight power supply via GPIO.

7. The display device according to claim 6, characterized in that, After the logic board controlling the display is adjusted to double line mode or normal mode, the controller is further configured to: The backlight power supply in the display is controlled via GPIO to turn on the backlight.

8. A method for displaying video signals, characterized in that, The video signal display method includes: Extract the resolution information of the current video signal based on the decoded video signal; When the resolution represented by the resolution information is less than the preset resolution, the video signal is preprocessed to obtain a standard video signal, and the logic board of the display is controlled to adjust to the double line mode so that the display outputs the standard video signal in the double line mode. The double line mode refers to the mode of doubling the refresh rate by doubling the scan lines. When the resolution represented by the resolution information is greater than or equal to the preset resolution, the video signal is preprocessed to obtain a standard video signal, and the logic board of the display is controlled to adjust to the normal mode so that the display outputs the standard video signal in the normal mode.

9. The video signal display method according to claim 8, characterized in that, The step of preprocessing the video signal to obtain a standard video signal includes: The screen display engine in the graphics layer is stored in the memory allocated by the graphics drawing window, and after scaling, it is stored in the display frame buffer. The decoded video signal in the video layer is scaled up to the same size as the scaled screen display engine, and then image quality processing is performed. The graphics layer and the video layer are mixed to obtain a mixed image, and the mixed image is encoded to obtain a VBO signal.

10. The video signal display method according to claim 9, characterized in that, The preset resolution is The method includes scaling the screen display engine in the graphics layer. The resolution represented by the resolution information is less than At that time, the screen display engine is scaled to ; The resolution represented by the resolution information is greater than or equal to At that time, the screen display engine is scaled to .

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