Display device and multi-screen image quality synchronization method

Abstract

The embodiment of the invention provides a display device and a multi-screen image quality synchronization method, and the method can respond to an access signal of a second display and read expanded display identification data of the second display. And querying a transmission protocol of the second display according to the expanded display identification data. If the transmission protocol of the second display comprises the image quality synchronization protocol, obtaining first image quality associated information; wherein the first image quality associated information is associated with an image quality parameter of the first user interface. And sending the first image quality associated information to the second display based on the first device interface, so that the second display sets an image quality parameter of the second user interface according to the first image quality associated information. According to the method, when a second display supports an image quality synchronization protocol, data information associated with image quality parameters of a first user interface is sent to the second display, so that the second display presents a user interface consistent with the image quality effect of the first user interface, and the problem that the image quality effects of multiple screens cannot be synchronized is solved.

Description

Technical Field

[0001] The present application relates to the technical field of display devices, and in particular to a display device and a method for synchronizing multi-screen image quality. Background Art

[0002] Display devices are intelligent devices that can present user interfaces and support user interaction. Taking smart TVs as an example, smart TVs are based on Internet application technology, have open operating systems and chips, have open application platforms, can realize two-way human-computer interaction functions, and are TV products that integrate multiple functions such as audio and video, entertainment, and data to meet the diverse and personalized needs of users. Display devices can also adjust the image quality parameters such as brightness, color, and clarity corresponding to the user interface to present different image quality effects.

[0003] In order to adapt to different scenarios, the display device can perform different image processing processes for different signal source channels and image modes, that is, the image quality effects presented by the display device are different when the signal source channels or image modes are different. For example, when the signal source is an HDMI signal, the display device will set a higher resolution when performing image quality processing. The display device can also be connected to other displays through device interfaces such as HDMI to form a multi-screen display system including a main screen and a secondary screen. In the multi-screen display system, the main screen serves as the output end and the secondary screen serves as the input end. The main screen continuously transmits signals to the secondary screen, so that the secondary screen can present the display content of the main screen in real time.

[0004] However, the main screen and the secondary screen establish a communication connection through the device interface, and the signal source channel of the secondary screen is the signal source channel corresponding to the device interface. For example, when the main screen and the secondary screen are connected through the HDMI interface, the secondary screen receives the HDMI signal sent by the main screen, and the signal source channel of the secondary screen is the HMDI channel. At this time, the main screen may be in other signal source channels such as DTV channels, multimedia channels, network media resources, etc., so when the main screen and the secondary screen are connected, their signal source channels may not be the same. Similarly, the image modes of the main screen and the secondary screen may also be different. When the signal source channels or image modes of the main screen and the secondary screen are different, the image processing processes performed by the main screen and the secondary screen are also different, and the picture quality effects presented are also different, which leads to the inability to synchronize the picture quality effects between multiple screens, reducing the user experience. Summary of the invention

[0005] The present application provides a display device and a method for synchronizing multi-screen image quality to solve the problem that image quality effects between multiple screens cannot be synchronized.

[0006] In a first aspect, some embodiments of the present application provide a display device, including a first display, a first device interface, and a controller. The first display is configured to display a first user interface, the first device interface is configured to connect to a second display, and the second display is used to display a second user interface. The controller is configured to execute the following program steps:

[0007] In response to the access signal of the second display, reading the extended display identification data of the second display;

[0008] querying a transmission protocol of the second display according to the extended display identification data;

[0009] If the transmission protocol of the second display includes a picture quality synchronization protocol, obtaining first picture quality associated information, where the first picture quality associated information is associated with a picture quality parameter of the first user interface;

[0010] The first image quality associated information is sent to the second display based on the first device interface, so that the second display sets the image quality parameters of the second user interface according to the first image quality associated information.

[0011] In a second aspect, some embodiments of the present application further provide a display device, including a second display, a second device interface, and a controller. The second display is configured to display a second user interface, the second device interface is configured to connect to a first display, and the first display is used to display a first user interface. The controller is configured to display the following program steps:

[0012] In response to an access signal of the first display, receiving first image quality associated information based on the second device interface, the first image quality associated information being associated with an image quality parameter of the first user interface;

[0013] Recording second image quality associated information, where the second image quality associated information is associated with an image quality parameter of the second user interface;

[0014] Setting image quality parameters of the second user interface according to the first image quality associated information;

[0015] When a disconnection signal of the first display is monitored, the image quality parameters of the second user interface are set according to the second image quality associated information.

[0016] In a third aspect, some embodiments of the present application further provide a method for synchronizing multi-screen image quality, which is applied to the display device provided in the first aspect, wherein the display device includes a first display, a first device interface, and a controller; the first display is configured to display a first user interface, the first device interface is configured to connect to a second display, and the second display is used to display a second user interface; the method includes:

[0017] In response to the access signal of the second display, reading the extended display identification data of the second display;

[0018] querying a transmission protocol of the second display according to the extended display identification data;

[0019] If the transmission protocol of the second display includes a picture quality synchronization protocol, obtaining first picture quality associated information, where the first picture quality associated information is associated with a picture quality parameter of the first user interface;

[0020] The first image quality associated information is sent to the second display based on the first device interface, so that the second display sets the image quality parameters of the second user interface according to the first image quality associated information.

[0021] It can be seen from the above technical solutions that some embodiments of the present application provide a display device and a method for synchronizing multi-screen image quality, and the method can respond to the access signal of the second display and read the extended display identification data of the second display. Then query the transmission protocol of the second display based on the extended display identification data. If the transmission protocol of the second display includes a picture quality synchronization protocol, obtain the first picture quality associated information. Among them, the first picture quality associated information is associated with the picture quality parameters of the first user interface. Then, based on the first device interface, the first picture quality associated information is sent to the second display, so that the second display sets the picture quality parameters of the second user interface according to the first picture quality associated information. When the second display supports the picture quality synchronization protocol, the method sends data information associated with the picture quality parameters of the first user interface to the second display, so that the second display can present a second user interface with the same picture quality effect as the first user interface, thereby improving the problem that the picture quality effects between multiple screens cannot be synchronized. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 A schematic diagram showing usage scenarios of a display device in some embodiments of the present application;

[0024] Figure 2 A hardware configuration block diagram of a display device provided in some embodiments of the present application;

[0025] Figure 3 A hardware configuration block diagram of a control device provided in some embodiments of the present application;

[0026] Figure 4 A schematic diagram of software configuration in a display device provided in some embodiments of the present application;

[0027] Figure 5 A schematic diagram of the effect of the image setting interface provided in some embodiments of the present application;

[0028] Figure 6 An interactive diagram of an HDMI interface provided for some embodiments of the present application;

[0029] Figure 7 An architectural diagram of a dual-screen system provided for some embodiments of the present application;

[0030] Figure 8 A schematic diagram of the display effects of the main screen and the secondary screen provided in some embodiments of the present application;

[0031] Fig. 9 A flowchart of a method for performing multi-screen image quality synchronization at a transmitting end provided in some embodiments of the present application;

[0032] Fig.10 A schematic diagram of a process of querying a picture quality synchronization protocol provided in some embodiments of the present application;

[0033] Fig.11 A schematic diagram of a process for setting target parameters provided in some embodiments of the present application;

[0034] Fig.12 A schematic diagram of a process for refreshing target parameters provided in some embodiments of the present application;

[0035] Fig.13 A schematic diagram of a process for detecting description information provided in some embodiments of the present application;

[0036] Fig.14 A flowchart of a method for performing multi-screen image quality synchronization at a receiving end provided in some embodiments of the present application;

[0037] Fig.15 A schematic diagram of the display effect of the main screen and the secondary screen after image quality synchronization provided in some embodiments of the present application. DETAILED DESCRIPTION

[0038] The following embodiments are described in detail, and examples thereof are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementations described in the following embodiments do not represent all implementations consistent with the present application. They are only examples of systems and methods consistent with some aspects of the present application as detailed in the claims.

[0039] It should be noted that the brief description of 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 specified, these terms should be understood according to their common and usual meanings.

[0040] The terms "first", "second", "third", etc. in the specification and claims of this application and the above drawings are used to distinguish similar or similar objects or entities, and do not necessarily mean to limit a specific order or sequence, unless otherwise noted. It should be understood that the terms used in this way can be interchangeable under appropriate circumstances.

[0041] The terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover but not exclude inclusion, for example, a product or device comprising a list of components is not necessarily limited to all the components expressly listed but may include other components not expressly listed or inherent to such product or device.

[0042] The term "module" refers to any known or later developed hardware, software, firmware, artificial intelligence, fuzzy logic, or combination of hardware and / or software code that is capable of performing the functions associated with that element.

[0043] Figure 1 This is a schematic diagram of an operation scenario between a display device and a control device provided in some embodiments of the present application. Figure 1 As shown in FIG. 1 , the user can operate the display device 200 through touch operation, the mobile terminal 300 and the control device 100. The control device 100 may be a remote controller, a stylus pen, or the like.

[0044] In some embodiments, the mobile terminal 300 can install software applications with the display device 200, and achieve connection and communication through a network communication protocol to achieve the purpose of one-to-one control operation and data communication. The audio and video content displayed on the mobile terminal 300 can also be transmitted to the display device 200 to achieve a synchronous display function.

[0045] like Figure 1 As also shown in FIG. 4 , the display device 200 also communicates data with the server 400 through various communication methods. The display device 200 may be allowed to communicate and connect through a local area network (LAN), a wireless local area network (WLAN), and other networks.

[0046] In addition to providing the broadcast receiving television function, the display device 200 may also provide an intelligent network television function with computer support functions, including but not limited to network television, smart television, Internet Protocol television (IPTV), etc.

[0047] Figure 2 Some embodiments of the present application provide Figure 12 is a block diagram of the hardware configuration of the display device 200.

[0048] In some embodiments, the display device 200 includes at least one of a tuner 210, a communicator 220, a detector 230, a device interface 240, a controller 250, a display 260, an audio output interface 270, a memory, a power supply, and a user interface.

[0049] In some embodiments, the detector 230 is used to collect signals of the external environment or external interaction. For example, the detector 230 includes a light receiver, a sensor for collecting the intensity of ambient light; or, the detector 230 includes an image collector, such as a camera, which can be used to collect external environment scenes, user attributes or user interaction gestures; or, the detector 230 includes a sound collector, such as a microphone, etc., for receiving external sounds.

[0050] In some embodiments, the display 260 includes a display screen component for presenting images, and a driving component for driving image display, which is used to receive image signals output from a controller, display video content, image content, and a menu control interface component and a user control UI interface, etc.

[0051] In some embodiments, the communicator 220 is a component for communicating with an external device or server 400 according to various communication protocol types. The display device 200 may be provided with a plurality of communicators 220 according to different supported communication modes. For example, when the display device 200 supports wireless network communication, the display device 200 may be provided with a communicator 220 including a WiFi function. When the display device 200 supports Bluetooth connection communication, the display device 200 needs to be provided with a communicator 220 including a Bluetooth function.

[0052] The communicator 220 can connect the display device 200 to the external device or the server 400 by wireless or wired connection. Among them, the wired connection can connect the display device 200 to the external device through components such as data cables and interfaces. The wireless connection can connect the display device 200 to the external device through wireless signals or wireless networks. The display device 200 can establish a connection relationship with the external device directly, or indirectly establish a connection relationship through a gateway, a router, a connection device, etc.

[0053] In some embodiments, the display device 200 may also support establishing a communication connection relationship with multiple external devices at the same time. Multiple external devices may be connected through the same. For example, the external device is a terminal device 500 such as a mobile phone or a tablet computer. The first terminal device 510 and the second terminal device 520 may establish a communication connection with the display device 200 by accessing the wireless local area network where the display device 200 is located. Multiple external devices may also be connected to the display device 200 through different types of connection methods. For example, the first terminal device 510 is connected to the display device 200 via a wireless local area network; the second terminal device 520 is connected to the display device 200 via Bluetooth.

[0054] In order to realize the communication connection between the display device 200 and the terminal device 500, the display device 200 and the terminal device 500 are respectively provided with communicators supporting the same communication type. For example, when the display device 200 is provided with a communicator 220 including a WiFi module, the terminal device 500 should also be provided with a communicator including a WiFi module. In addition, when the same type of communicators are provided, a specific communication transmission protocol is also required between the display device 200 and the terminal device 500 for data transmission. For example, WiFi protocol, Bluetooth connection protocol, ZigBee protocol, NFC protocol, etc.

[0055] In some embodiments, the controller 250 includes a processor, a video processor, an audio processor, a graphics processor, a RAM, a ROM, and a first interface to an nth interface for input / output. The controller 250 controls the operation of the display device and responds to the user's operation through various software control programs stored in the memory. The controller 250 controls the overall operation of the display device 200.

[0056] In some embodiments, the controller 250 and the tuner-demodulator 210 may be located in different separate devices, that is, the tuner-demodulator 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.

[0057] In some embodiments, the user may input a user command through a graphical user interface (GUI) displayed on the display 260 , and the user input interface receives the user input command through the graphical user interface (GUI).

[0058] In some embodiments, the user interface 280 is an interface that can be used to receive control input.

[0059] Figure 3 Some embodiments of the present application provide Figure 1 The hardware configuration diagram of the control device in the figure. Figure 3As shown, the control device 100 includes a controller 110, a communication interface 130, a user input / output interface, a memory, and a power supply.

[0060] The control device 100 is configured to control the display device 200 , and can receive user input operation instructions, and convert the operation instructions into instructions that the display device 200 can recognize and respond to, playing the role of an interactive intermediary between the user and the display device 200 .

[0061] In some embodiments, the control device 100 may be a smart device, for example, the control device 100 may be installed with various applications for controlling the display device 200 according to user needs.

[0062] In some embodiments, Figure 1 As shown, the mobile terminal 300 or other intelligent electronic devices can play a similar function as the control device 100 after installing the application for controlling the display device 200 .

[0063] The controller 110 includes a processor 112, a RAM 113, a ROM 114, a communication interface 130, and a communication bus. The controller 110 is used to control the operation and operation of the control device 100, as well as the communication and cooperation between the internal components and the external and internal data processing functions.

[0064] The communication interface 130 implements communication of control signals and data signals with the display device 200 under the control of the controller 110. The communication interface 130 may include at least one of other near field communication modules such as a WiFi chip 131, a Bluetooth module 132, and an NFC module 133.

[0065] The user input / output interface 140 , wherein the input interface includes at least one of other input interfaces such as a microphone 141 , a touch panel 142 , a sensor 143 , and a button 144 .

[0066] In some embodiments, the control device 100 includes at least one of a communication interface 130 and an input / output interface 140. The control device 100 is configured with a communication interface 130, such as a WiFi, Bluetooth, NFC or other module, which can encode the user input command through the WiFi protocol, Bluetooth protocol, or NFC protocol and send it to the display device 200.

[0067] The memory 190 is used to store various operating programs, data and applications for driving and controlling the control device 100 under the control of the controller. The memory 190 can store various control signal instructions input by the user.

[0068] The power supply 180 is used to provide operating power support for each component of the control device 100 under the control of the controller.

[0069] like Figure 4 In some embodiments, the system is divided into four layers, from top to bottom, namely, the application layer (Applications) layer (referred to as "application layer"), the application framework layer (Application Framework) layer (referred to as "framework layer"), the Android runtime (Android runtime) and system library layer (referred to as "system runtime library layer"), and the kernel layer.

[0070] In some embodiments, at least one application is running in the application layer, and these applications can be window programs, system settings programs, clock programs, etc. provided by the operating system, or applications developed by third-party developers. In specific implementations, the application packages in the application layer are not limited to the above examples.

[0071] The framework layer provides application programming interfaces (APIs) and programming frameworks for applications. The application framework layer includes some predefined functions. The application framework layer is equivalent to a processing center that determines the actions that applications in the application layer take. Through the API interface, applications can access system resources and obtain system services during execution.

[0072] like Figure 4 As shown, in the embodiment of the present application, the application framework layer includes a view system, managers, content providers, etc., wherein the view system can design and implement the interface and interaction of the application, and the view system includes lists, grids, text boxes, buttons, etc. The manager includes at least one of the following modules: an activity manager for interacting with all activities running in the system; a location manager for providing system services or applications with access to system location services; a package manager for retrieving various information related to the application package currently installed on the device; a notification manager for controlling the display and clearing of notification messages; and a window manager for managing icons, windows, toolbars, wallpapers, and desktop components on the user interface.

[0073] In some embodiments, the activity manager is used to manage the life cycle of each application and the common navigation back function, such as controlling the exit, opening, and back of the application. The window manager is used to manage all window programs, such as obtaining the display screen size, determining whether there is a status bar, locking the screen, capturing the screen, and controlling the display window changes (for example, reducing the display window, shaking the display, distorting the display, etc.).

[0074] In some embodiments, the system runtime layer provides support for the upper layer, namely the framework layer. When the framework layer is used, the Android operating system will run the C / C++ library contained in the system runtime layer to implement the functions to be implemented by the framework layer.

[0075] In some embodiments, the kernel layer is a layer between hardware and software. Figure 4 As 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, etc.

[0076] In some embodiments, the application layer of the display device 200 includes at least one application, and the display device 200 can use the application of the application layer to make the user interface display different contents. For example, the application may include a video player application, and the video player application is used to play media data.

[0077] In some embodiments, the video playback application can play different types of media data through different types of signal source channels. For example, the video playback application can obtain a live signal provided by a cable TV, wireless broadcast, satellite service, etc. through a corresponding signal source channel, and display the media data of the live signal on the display device 200; or the video playback application can also obtain an on-demand signal provided by a storage source such as a cloud storage server, a local hard disk storage, etc., and display the media data of the on-demand signal on the display device 200.

[0078] In some embodiments, the display device 200 can be connected to other devices through the device interface 240. The device interface 240 can be a USB interface, an HDMI interface, etc. The display device 200 can establish a corresponding signal source channel with other devices through the device interface, and transmit signals through the signal source channel. For example, the display device 200 can be connected to a computer through an HDMI interface, receive audio and video signals sent by the computer, and enable the display device 200 to display the display content of the computer. At this time, the signal source channel of the display device 200 is an HDMI channel.

[0079] In order to ensure the user's viewing experience, in some embodiments, when setting different picture quality parameters, the display device 200 will perform different picture quality processing processes, so that the user interface of the display device 200 presents different picture quality effects. For example, the display device 200 can adjust various picture quality parameters, such as brightness, color, clarity, contrast, color temperature, and dynamic range through the image setting function. The image setting function is implemented based on the image setting interface, and the user can call up the image setting interface based on the setting function interface of the display device 200. Then, through each menu item in the image setting interface, modify the parameter value of each picture quality parameter, that is, the application layer of the display device 200 will send a notification to the framework layer (Framework) according to each menu item, so that the framework layer calls the corresponding interface in the driver layer to set the picture quality parameters.

[0080] In some embodiments, the display device 200 includes multiple image modes, each image mode can be associated with multiple image quality parameters, and the specific parameter values ​​of each image quality parameter are also different. Therefore, in different image modes, the display device 200 will perform different image quality processing processes. Among them, the image mode data is stored in the database, and the image mode is divided into Source (source) memory. For example, the image mode may include AI image quality, standard, vivid, children, theater, sports, games, etc., and the user can select the image quality mode through Figure 5 The image setting interface shown actively switches the image mode of the display device 200 .

[0081] Alternatively, in some embodiments, when the type of device connected to the display device 200 changes, and / or the type of media asset data played by the display device 200 changes, the display device 200 can automatically switch the image mode. For example, when the display device 200 is connected to a game console through the device interface 240, the display device 200 can detect the device type of the game console in response to the access signal of the game console, and switch the image mode to the game mode according to the device type of the game console.

[0082] In some embodiments, the image quality processing performed by the display device 200 may be different under different signal source channels. For example, when the signal source channel is a DTV channel, the display device 200 performs color restoration when performing image quality processing; when the signal source channel is an ATV channel, the display device 200 performs color adjustment or color enhancement when performing image quality processing.

[0083] like Figure 6As shown, in some embodiments, the display device 200 can be connected to other devices through HDMI input (HDMI in), such as a network box, a computer, a game console, etc. At this time, the display device 200 acts as a receiving end (sink) and the external device acts as a receiving end (source). When the transmitting end is connected to the receiving end, the transmitting end pulls up the 5V voltage through the HDMI interface so that the 5V voltage can be added to the receiving end at the same time. For example, when the HDMI interface of the transmitting end is connected to the receiving end, the transmitting end adds the 5V voltage to the receiving end through the 18th pin (PWR_CON_PIN18) of the HDMI interface. In this way, even if the receiving end is not turned on, the transmitting end can read the EDID (Extended Display Identification Data) of the receiving end through the HDMI interface.

[0084] After the receiving end detects a stable 5V voltage signal, it prepares the HDCP key and EDID file and pulls up the HPD (Hot Plug Detection) signal. HDCP (High-bandwidth Digital Content Protection) is a content protection technology that can perform data encryption and authorization verification. Each device is preset with a key for verification.

[0085] After detecting that the HPD is pulled high, the receiving end performs an HDCP check with the receiving end and reads the EDID of the receiving end through the DDC (Display Data Channel) of the HDMI interface. Among them, the EDID includes information related to the device of the receiving end, such as resolution, refresh rate, and color support. The sending end then transmits audio and video signals to the receiving end through the TMDS (Transition Minimized Differential Signaling) data channel and TMDS clock channel in the HDMI interface based on the EDID information, so that the receiving end plays or displays the audio and video data of the sending end. Among them, the TMDS data channel is used to transmit the RGB data of the pixel points, and the TMDS clock channel is used to maintain the unified timing required for transmission.

[0086] In some embodiments, the HDMI interface is also configured with CEC (Consumer Electronics Control Channel). The receiving end can report the status of the receiving end to the sending end through CEC, and CEC supports multiple commands and functions, such as power on / off, volume control, input switching, etc.

[0087] Obviously, since the TMDS data channel and the TMDS clock channel are both data channels of the HDMI interface, the audio and video signals received by the receiving end are HDMI signals, and the signal source channel of the receiving end is the HDMI channel, that is, the display device 200 can receive audio and video signals sent by other devices through the HDMI interface to play or display the audio and video data of other devices through the display device 200. At this time, the signal source channel of the display device 200 is the HDMI channel.

[0088] Similarly, in some embodiments, the display device 200 can also be connected to other display devices, such as a TV, a monitor, etc., through HDMI output (HDMI out). In this case, the display device 200 acts as a transmitter (source) and the external display device acts as a receiver (sink). The interaction process between the transmitter and the receiver is as follows: Figure 7 As shown, the display device 200 can also send HDMI signals to other display devices through the HDMI interface, so that other display devices play or display the audio and video data of the display device 200.

[0089] Therefore, in some embodiments, the display device 200 can form a dual-screen system by connecting an external display to the display 260 via the HDMI output to achieve a dual-screen display mode. Figure 7 As shown, the dual-screen system may include an image generation (Image Producer) module, an image rendering (Surface Flinger) module, a synthesis (Composer) module, a video process (Video Processing Unit hardware, VPU hardware) module, and a main screen (Panel screen) and a secondary screen (HDMI screen).

[0090] During the display process, the media player (media player), camera peripheral (camera view) and graphics interface (openGLES) of the image generation module can generate image content and pass the image content to the image rendering module. The image rendering module includes a primary display unit (primary display) and an extended display unit (external display). The primary display unit is used to control the display content of the main screen, that is, the primary display unit renders the image content through the user interaction layer (UI layer) or the video layer (video layer) according to the image content.

[0091] In order to obtain a better display effect, the image content of the UI layer can be rendered by the GPU component, so as to form a picture frame for display in the synthesis module. Among them, the picture frames can be stored in the synthesis module through the frame buffer and the video buffer respectively, and the picture content is formed in the corresponding layers through the video process module. That is, the image frames generated by the video playback process form the picture content through the video plane, and the image frames of other image pictures (such as touch tracks, graphics, etc.) form the picture content through the primary OSD plane. Finally, the display device 200 forms the final picture through the blending unit of the video process module and displays it on the main screen.

[0092] The extended display unit is used to control the display content of the secondary screen, that is, after the image generation module passes the image content to the image rendering module, the extended display unit also renders the image content through the UI layer or the video layer. According to the display process of the main screen, the image frame is formed by the image rendering module, the synthesis module and the video process module respectively, and displayed on the secondary screen.

[0093] In some embodiments, in order to obtain a better picture display effect, an additional extended display layer (external OSD plane) can be set in the video process module of the display device 200 on the basis of the main OSD layer and the video layer. The extended display layer can be configured with different layer characteristics according to specific display effect requirements. For example, the bitmap refresh mode of the extended display layer can be modified so that the extended display layer is refreshed in real time according to the region, thereby improving the display speed of the graphics. At this time, the extended display layer can be used as an acceleration layer in scenes with high dynamic display effects.

[0094] Based on the above embodiments, Figure 8 As shown, after the secondary screen receives the HDMI signal sent by the main screen through the HDMI channel, it can present the same display content as the main screen. Since the signal source channel of the secondary screen is the HDMI channel, the secondary screen will perform image quality processing according to the HDMI channel. However, when the main screen sends a signal to the secondary screen, the signal source channel of the main screen may not be the HDMI channel. For example, the signal source channel of the main screen may be the DTV channel. At this time, the main screen will perform image quality processing according to the DTV channel. Similarly, when the image modes of the main screen and the secondary screen are different, the two will also perform image quality processing according to different image quality parameters. In this way, if the signal source channel or image mode of the main screen and the secondary screen are different, the image quality effects presented by the main screen and the secondary screen cannot be synchronized.

[0095] Based on the above application scenarios, in order to improve the problem of out-of-sync picture quality between multiple screens, some embodiments of the present application provide a display device 200, including a first display 261, a first device interface 241, and a controller 250. Among them, the first display 261 is configured to display a first user interface; the first device interface 241 is configured to connect to a second display 262, and the second display 262 is used to display a second user interface. The first device interface 241 is a device interface for implementing an output function, that is, the first display 261 is the main screen described in the above embodiments, and the second display 262 is the secondary screen described in the above embodiments.

[0096] As Fig. 9 shown, the controller 250 is configured to execute the following program steps:

[0097] S901: In response to the access signal of the second display 262, read the extended display identification data of the second display 262.

[0098] When the display device 200 is connected to the second display 262 based on the first device interface 241, an access signal of the second display 262 will be generated. When the display device 200 detects the access signal of the second display 262, in response to the access signal, it reads the extended identification data of the second display 262 through the first device interface 241. Among them, the display device 200 can read the extended identification data of the second display 262 through the display data channel in the first device interface 241. The display data channel is used to transmit data information between the display device 200 and the second display 262 to exchange the configuration information of the two. For example, the display device 200 can read the EDID of the second display 262 through the DDC of the HDMI interface.

[0099] For ease of description, in the embodiments of the present application, the first device interface 241 is used as an HDMI output for illustration.

[0100] For example, the HDMI output of the display device 200 is connected to the second display 262. The display device 200, as a sending end, pulls up the 5V voltage signal through the 18th pin of the HDMI interface. After the second display 262 detects a stable 5V voltage, it prepares its own HDCP key and EDID, and pulls up the HPD signal to generate a plug-and-play signal for the second display 262. Among them, the plug-and-play signal includes an access signal and a disconnection signal. When HPD is pulled up, it is an access signal, and when HPD is pulled down, it is a disconnection signal. When the display device 200 detects that HPD is pulled up, it then reads the EDID of the second display 262 through the DDC channel (I2C) of the 15th and 16th pins of the HDMI interface.

[0101] In some embodiments, when the display device 200 detects the access signal of the second display 262, it performs HDCP verification based on the first device interface 241 and the second display 262 to ensure the security of the transmission between the display device 200 and the second display 262. If the HDCP verification passes, the display device 200 reads the EDID of the second display 262; if the HDCP verification fails, the display device 200 displays a prompt message indicating that the verification failed.

[0102] S902: Query the transmission protocol of the second display according to the extended display identification data.

[0103] After reading the extended display information of the second display 262, the display device 200 can determine the resolution, refresh rate, and functions supported by the second display 262 according to the extended display information of the second display 262. The display device 200 can determine the display position of the media asset data based on information such as resolution and refresh rate, and determine the transmission protocol of the second display 262 according to the functions supported by the second display 262. Therefore, the display device 200 can query the transmission protocol supported by the second display 262 according to the extended display identification data of the second display. For example, whether SCDC (State and Control Data Channel) is supported.

[0104] Among them, SCDC is an extended display data channel in the HDMI interface, which is used to transmit extended data information. The extended data information is an SCDC data packet. The extended data information may include but is not limited to information such as commands and control signals of the display device 200.

[0105] In some embodiments, the display device 200 can configure the image quality synchronization protocol based on SCDC. The display device 200 reserves a fixed number of readable and writable addresses in the SCDC of the HDMI interface, and transmits the first image quality associated information associated with the first user interface image quality parameter through the reserved address. The display device 200 can send an SCDC data packet to other devices supporting SCDC based on the SCDC of the HDMI interface, and the data packet may include metadata for controlling and monitoring HDMI signal transmission.

[0106] Since the image quality processing performed by the display device 200 is associated with the image mode and the signal source channel, in some embodiments, the first image quality associated information includes the image mode and the signal source channel. The display device 200 can set the parameters of the reserved address in the SCDC according to the image mode and the signal source channel, and send the SCDC data packet to other devices supporting SCDC according to the set parameters. Since the SCDC data packet includes the first image quality associated information composed of the image mode and the signal source channel, other devices can obtain the first image quality associated information after receiving the SCDC data packet, and set the image parameters according to the first image quality associated information.

[0107] For example, as shown in the following table, the display device 200 can reserve a 7-bit address in the starting address 0x30 of SCDC, and use bit1-bit3 to represent the signal source channel of the display device 200, and the preset mapping value of each signal source channel is: 0-multimedia channel, 1-network video, 2-HDMI channel, 3-DTV channel, 4-ATV channel, 5-AV channel; use bit4-bit6 to represent the image mode of the first user interface, and the preset mapping value of each image mode is 0-AI picture quality, 1-standard, 2-vivid, 3-children, 4-sports, 5-cinema, 6-game.

[0108] SCDCS Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 0x30 Rsvd(0) Rsvd(0) Rsvd(0) Rsvd(0) Rsvd(0) Rsvd(0)

[0109] Among them, Rsvd(0) represents a reserved address, and the display device 200 can refresh the parameters of each bit according to the preset mapping value of the image mode and the signal source channel. When the signal source channel is the AV channel and the image mode is AI quality, the parameters of bit1-bit6 are 101000.

[0110] It is to be understood that the above reserved addresses and various parameter values ​​are only exemplary, and other addresses or other parameter values ​​may also be used, and the number of reserved addresses may also be more or less, and the represented signal source channels and image modes may be more or less types. This application does not limit this.

[0111] Therefore, in order to facilitate determining whether the second display 262 supports the picture quality synchronization protocol, in some embodiments, the first device interface of the display device 200 is configured to form a display data channel. The display device 200 obtains extended display identification data based on the display data channel to determine whether the second display 262 includes an extended display data channel. For example, when the EDID of the second display 262 includes a valid HF-VSDB (High-Definition Vendor-Specific Data Block) and the SCDC_Present bit (status and control data channel presence bit) in the HF-VS DB is set to 1, it indicates that the second display 262 supports SCDC. Among them, HF-VSDB is an extended display identification data block used to characterize that the second display includes SCDC.

[0112] That is, when the extended display identification data includes an extended display data block, it indicates that the second display 262 supports the extended display data channel. The extended display identification data block is used to indicate that the second display 262 includes an extended display data channel, and the extended display data channel is used to transmit extended data information. When the extended display identification data does not include an extended display data block, it indicates that the second display 262 does not support the extended display data channel, and the second display 262 can be directly marked as not supporting the image quality synchronization protocol.

[0113] Obviously, the extended identification data of the second display 262 including the extended display identification data block can only indicate that the second display 262 includes the extended display identification channel, and the display device 200 also needs to detect whether the transmission protocol of the second display 262 includes the image quality synchronization protocol according to the extended identification data. The second display 262 can be characterized by the reference parameter of the target field in the extended display data block as to whether the image quality synchronization protocol is included. When the second display 262 is preset with a mapping relationship between the first image quality association information and the mapping value, the preset template parameter is set in the target field of the extended display data block.

[0114] For example, the template parameter is PQ Sync1, as shown in the following table, the 4th bit of the 6th byte in HF-VSDB is reserved as the target field. When the second display 262 is configured with the image quality synchronization protocol, the reference parameter of the HF-VSDB target field in the EDID of the second display 262 is PQ Sync1.

[0115] Byte\Bit 4 6 HESPQSync1

[0116] It is understandable that the above template parameters are only an exemplary description, and the template parameters described in the embodiment of the present application can be English characters, numeric characters, or a combination of English and numeric characters. This application does not impose any limitation on this.

[0117] Therefore, if Fig.10 As shown, when the extended display identification data includes an extended display data block, the display device 200 also reads the reference parameters of the target field in the extended display data block. If the reference parameters are the same as the template parameters, the transmission protocol of the second display 262 is marked to include the image quality synchronization protocol; if the reference parameters are not the same as the template parameters, the transmission protocol of the second display 262 is marked to not include the image quality synchronization protocol.

[0118] S903: If the transmission protocol of the second display includes an image quality synchronization protocol, obtain first image quality associated information.

[0119] The display device 200 queries the transmission protocol included in the second display 262 according to the extended display identification data of the second display 262. When the transmission protocol includes the image quality synchronization protocol, the display device 200 obtains the current first image quality associated information. The first image quality associated information is associated with the image quality parameters of the first user interface, such as the image mode and signal source channel of the current display device 200.

[0120] In order to transmit the first image quality related information to the second display 262, such as Fig.11 As shown, in some embodiments, when the display device 200 obtains the first image quality associated information, it detects the image mode of the signal source channel and the first user interface, and queries the first signal source mapping value of the signal source channel and the first mode mapping value of the image mode. Then, the target parameter of the extended data information is set according to the first signal source mapping value and the first mode mapping value. Among them, the target parameter is the parameter of the target address in the extended data information, and the target parameter is used to characterize the first image quality associated information. After the display device 200 sets the target parameter of the extended data information, it records the extended data information to store the various parameters in the extended data information.

[0121] For example, the display device 200 may reserve a 7-bit address in SCDC, characterize the signal source channel of the display device 200 through bit1-bit3, characterize the image mode of the first user interface through bit4-bit6, and the signal source channel is the AV channel, the signal source mapping value is 5, and the mode mapping value of the AI ​​image quality is 0. When the display device 200 finds out that the transmission protocol of the second display 262 includes the image quality synchronization protocol, it obtains that the signal source channel of the current display device 200 is the AV channel, the image mode of the first user interface is the AI ​​image quality, and finds out that the signal source mode mapping value is 5 and the mode mapping value is 0 according to the preset mapping relationship table, then sets the bits 1-bit 6 of SCDC to 101000 in sequence, forms the corresponding SCDC data packet, and records the above-mentioned extended data information through the register.

[0122] S904: Sending first image quality associated information to the second display based on the first device interface, so that the second display sets image quality parameters of the second user interface according to the first image quality associated information.

[0123] After acquiring the first image quality associated information, the display device 200 sends the first image quality associated information to the second display 262 based on the first device interface 241. After receiving the first image quality associated information, the second display 262 can set the image quality parameters of the second user interface according to the first image quality associated information, so that the image quality effect presented by the second user interface can be synchronized with the image quality effect presented by the first user interface, thereby improving the user's visual experience.

[0124] Since the extended data information includes target parameters for characterizing the first image quality associated information, in some embodiments, when the display device 200 sends the first image quality associated information to the second display 262, it sends the extended data information to the second display 262 based on the extended display data channel, so that the second display 262 sets the image quality parameters of the second user interface according to the target parameters.

[0125] For example, after the display device 200 sets the target parameters of the target address in the SCDC data packet according to the signal source channel and the image mode, the SCDC based on the HDMI interface sends the SCDC data packet to the second display 262. When the second display 262 receives the SCDC data packet, it reads the SCDC data packet according to the start address, and after reading the target parameters of the target address, it sets the image parameters of the second user interface according to the signal source channel and the image mode corresponding to the target parameters.

[0126] After the display device 200 is connected to the second display 262, if the connection between the display device 200 and the second display 262 is disconnected, the display device 200 needs to clear the recorded extended data information. In response to the situation of unstable signal, in some embodiments, after the display device 200 sends the extended data packet to the second display 262, it also responds to the disconnection signal of the second display and monitors the access signal of the second display in the target time period. If the access signal of the second display 262 is not detected in the target time period, the extended data information is cleared; if the access signal of the second display 262 is detected in the target time period, the extended data information is sent to the second display 262 based on the extended display data channel. In other words, when the display device 200 detects that the HPD signal is pulled down for more than the target time period, the recorded extended data is cleared; when the HPD signal is detected to be pulled down but pulled up again within the target time period, the extended data information is sent to the second display 262 again.

[0127] For example, when the target time period is 100ms, the display device 200 clears the extended data information recorded in the register when it detects that the HPD signal is pulled low for more than 100ms; when it detects that the HPD signal is pulled low but pulled high again within 100ms and 100ms, the recorded extended data information is resent to the second display 262.

[0128] Similarly, in some embodiments, after the display device 200 is connected to the second display 262, the pin of the first device interface 241 will continue to maintain a fixed voltage signal, such as the pin of the HDMI interface will continue to maintain a stable voltage of 5V. When the display device 200 detects that the 5V voltage is powered off, it means that the user disconnects the display device 200 from the second display 262, and the display device 200 clears the extended data information recorded in the register.

[0129] After the display device 200 sends the first image quality associated information to the second display 262, the second display 262 sets the image parameters of the second user interface according to the first image quality associated information. However, when the display device 200 sends the audio and video signals to the second display 262, the signal source channel and the image mode may also be switched.

[0130] In order to ensure that the image quality effects of the first user interface and the second user interface can be synchronized in real time, when the display device 200 switches the signal source channel, the display device 200 will resend the first image quality associated information to the second display 262 according to the new signal source channel, that is, in some embodiments, such as Fig.12 As shown, after the display device 200 sends the first image quality associated information to the second display 262, it also responds to the first change event of the signal source channel and detects the changed signal source channel. The changed signal source channel is the signal source channel after the first change event is executed. After detecting the changed signal source channel, the second signal source mapping value of the changed signal source channel is queried, and the target parameter is refreshed according to the second signal source mapping value. Then, the extended data information is sent to the second display 262 based on the extended display data channel.

[0131] Similarly, when the display device 200 switches the image mode, the display device 200 will resend the first image quality associated information to the second display 262 according to the new image mode, that is, in some embodiments, after the display device 200 sends the first image quality associated information to the second display 262, it also responds to the second change event of the image mode to detect the changed image mode. The changed image mode is the image mode of the first user interface after the second change event is executed. After detecting the changed image mode, the second mode mapping value of the changed image mode is queried, and the target parameter is refreshed according to the second mode mapping value. Then, the extended data information is sent to the second display 262 based on the extended display data channel.

[0132] That is to say, when the image mode and / or signal source channel of the display device 200 changes, the display device 200 re-queries the corresponding signal source mapping value and mode mapping value according to the changed image mode and / or signal source channel, updates the parameters of the target address of the extended data information through the newly queried signal source mapping value and mode mapping value, and sends the updated extended data information to the second display 262. After receiving the updated extended data information, the second display 262 resets the image quality parameters of the second user interface according to the extended data information, so that the image quality effect of the second user interface can be synchronized with the image quality effect of the first user interface in real time.

[0133] In some embodiments, when the display device 200 reads the extended identification data of the second display 262, it records the description information of the second display 262 in the database according to the extended identification data. The description information includes the device ID of the second display 262, the functions supported by the second display 262, and the transmission protocol of the second display 262, etc.

[0134] Therefore, in order to improve the response speed of the display device 200, as Fig.13 shown, in some embodiments, the display device 262 detects the target access signal of the target device, and in response to the target access signal, obtains the target extended display identification data of the target device signal, and detects whether the description information of the target device is included in the database according to the target extended display identification data. If the description information of the target device is included in the database, it reads whether the transmission protocol of the target device includes the image quality synchronization protocol in the description information; if the description information of the target device is not included in the database, it detects whether the target extended display identification data includes an extended display data block, and reads the reference parameters of the target field in the extended display data block when the target extended display identification data includes the extended display data block, so as to determine whether the transmission protocol of the target device includes the image quality synchronization protocol.

[0135] Based on the above embodiments, some embodiments of the present application further provide a display device 200, including a second display 262, a second device interface 242, and a controller 250. Among them, the second display 262 is configured to display a second user interface, the second device interface 242 is configured to be connected to the first display 261, the first display 261 is used by the user to display a first user interface, the second device interface 242 is a device interface for implementing an input function, that is, the second display 262 is the secondary screen described in the above embodiments, and the first display 261 is the main screen described in the above embodiments.

[0136] For ease of description, the second device interface 242 is used as an HDMI input in the embodiment of the present application. It should be noted that the first device interface 241 and the second device interface 242 described in the embodiment of the present application are respectively used to implement output and input function interfaces for users in terms of functions. In terms of hardware, the first device interface 241 and the second device interface 242 may be completely the same or different.

[0137] like Fig.14 As shown, the controller 250 is configured to perform the following program steps:

[0138] S1401: In response to an access signal of a first display, receiving first image quality associated information based on a second device interface.

[0139] When the display device 200 is connected to the first display 261 based on the second device interface 242, an access signal of the first display 261 is generated. For example, the HDMI input of the display device 200 is connected to the first display 261, and the display device 200, as a receiving end, pulls up the HPD when detecting the 5V voltage signal pulled up by the first display 261, thereby generating an access signal of the first display 261. When the display device 200 detects the access signal of the first display 261, it can synchronize the HDCP key and its own EDID to the first display 261 end based on the DDC of the HDMI interface.

[0140] Since the transmission protocol of the display device 200 includes the image quality synchronization protocol, the first display 261 is connected through the second device interface 242, and the first display 261 sends the first image quality associated information to the display device 200. The first image quality associated information is associated with the image quality parameters of the first user interface, such as the image mode, the signal source channel, etc. Therefore, after detecting the access signal of the first display 261, the display device 200 can respond to the access signal of the first display 261 and receive the first image quality associated information based on the second device interface 242.

[0141] In order to meet the personalized needs of users, in some embodiments, a picture quality synchronization switch control is provided in the setting interface of the display device 200. The user can set the enabling state of picture quality synchronization based on the picture quality synchronization switch control, including a picture quality synchronization on state or a picture quality synchronization off state. When the first display 261 reads that the display device 200 is in a picture quality synchronization on state, the first picture quality associated information is sent to the display device 200; when the first display 261 reads that the display device 200 is in a picture quality synchronization off state, the program step of sending the first picture quality associated information to the display device 200 is not executed.

[0142] S1402: Record second image quality related information.

[0143] After receiving the first image quality associated information, the display device 200 records the data information associated with the current second user interface, that is, the display device 200 records the second image quality associated information, and the second image quality associated information is associated with the image quality parameters of the second user interface. For example, when the display device 200 receives the first image quality associated information, it is in the image mode of AI image quality, and the display device 200 records the image mode of AI image quality.

[0144] S1403: Setting image quality parameters of the second user interface according to the first image quality associated information.

[0145] After recording the second image quality associated data, the display device 200 sets the image quality parameters of the current user interface according to the first image quality associated information, so that the image quality effect of the user interface in the second display 262 can be synchronized with the image quality effect of the user interface in the first display 261. For example, the first image quality associated information includes a signal source channel and an image mode, and when the display device 200 receives the first image quality associated information, it switches the image mode to a custom mode, and sets corresponding image parameters according to the signal source channel and the image mode in the first image quality associated information.

[0146] In some embodiments, when the first image quality associated information is represented by the target parameter of the target address in the SCDC data packet, the display device 200 reads the SCDC data packet when receiving the SCDC data packet, and queries the corresponding signal source channel and image mode according to the target parameter of the target address. Then, according to the queried signal source channel and image mode, the corresponding image quality parameter is detected, and the interface of the driver layer is called to set the image quality parameter.

[0147] That is to say, the display device 200 can simulate the scene corresponding to the signal source channel and the image mode based on the first image quality association information including the signal source channel and the image mode, so that the display device 200 executes the corresponding image quality processing process according to the simulated scene, thereby allowing the display device 200 to execute the image quality processing process synchronized with the first display 261 end.

[0148] S1404: When a disconnection signal of the first display is monitored, setting image quality parameters of the second user interface according to the second image quality associated information.

[0149] When the display device 200 is connected to the first display 261, the image parameters of the second user interface are set according to the first image quality associated information. When the display device 200 is disconnected from the first display 261, the display device 200 needs to restore the image quality parameters of the second user interface to the image quality parameters before the connection with the first display 261. Because the display device 200 records the second image quality associated information of the second user interface before setting the image quality parameters of the second user interface according to the first image quality associated information, when the display device 200 monitors the disconnection signal of the first display 261, the image quality parameters of the second interface can be directly set according to the recorded second image quality associated information, so that the second interface is restored to the original image quality effect.

[0150] In some embodiments, the first image quality associated information includes a signal source channel and an image mode, and the second image quality associated information includes an image mode. Since the HDMI input of the display device 200 is connected to the first display 261, the first display 261 serves as a transmitter, and the display device 200 serves as a receiver, the signal source channel of the display device 200 is an HDMI channel. In order to achieve the effect of image quality synchronization, when the display device 200 sets the image quality parameters of the second user interface according to the second image quality associated information, the signal source channel is not modifiable, so the display device 200 can only switch the image mode to the custom mode, thereby setting the image quality parameters of the second user interface. Therefore, when the display device 200 is disconnected from the first display 261, it is only necessary to restore the image mode of the second user interface to the image mode before connecting to the first display 261.

[0151] Since the access signal and disconnection signal of the first display 261 are both changes of the HPD signal, in order to simplify the interactive logic of the display device 200, in some embodiments, the display device 200 detects the target parameter of the extended data information in response to the plug-in and unplug signal of the first display 260. Among them, the extended data information is data information transmitted based on the extended display data channel, the target parameter is the parameter of the target address in the extended data information, and the target parameter is used to characterize the first image quality association information. If the target parameter is an initial parameter, the image quality parameter of the second user interface is set according to the second image quality association information; if the target parameter is not an initial parameter, the image quality parameter of the second user interface is set according to the target parameter.

[0152] That is, when the first display 261 is disconnected from the display device 200, the first display 261 will set the target parameter of the target address in the SCDC to the initial parameter 0, indicating that the first display 261 is disconnected from the display device 200. At this time, the display device 200 needs to set the image quality parameters of the second user interface according to the recorded second image quality association information. If the parameter of the target address in the SCDC is not the initial parameter 0, indicating that the display device 200 is disconnected from the first display 261 and reconnected, the image quality parameters of the second user interface are set according to the target parameters of the SCDC.

[0153] In some embodiments, the display device 200 also starts a target parameter detection thread in response to the plug-in signal of the first display. If the target parameter is inconsistent with the target parameter recorded last time, the image quality parameter of the second user interface is set according to the current target parameter; if the target parameter is consistent with the target parameter recorded last time, the display device 200 does not process it.

[0154] Exemplarily, the second image quality association information recorded by the display device 200 is a standard mode, and the initial parameter of the target parameter is 0. When the display device 200, as a receiving end, connects or disconnects the connection with the first display 261 through the HDMI input interface, an access or disconnection signal of the first display is generated. In response to the access or disconnection signal, the display device 200 detects the enabled state of the image quality synchronization in the display device 200. When the enabled state of the image quality synchronization is the image quality synchronization on state, the detection thread of the target parameter in the SCDC data packet is started.

[0155] If the target parameter is consistent with the previous target parameter, the display device 200 does not process it; if the target parameter is inconsistent with the previous target parameter, the display device 200 detects whether the target parameter is 0. If the target parameters are all 0, it indicates that the first display 261 is disconnected from the display device 200, and the display device 200 switches the image mode back to the standard mode. If the target parameters are not all 0, it is detected whether the target parameter is received for the first time; when the target parameter is received for the first time, the image mode is switched to the custom mode, and the image quality parameters are set according to the target parameter in the custom mode; when the target parameter is not received for the first time, the display device 200 directly sets the image quality parameters according to the target parameter.

[0156] Based on the above embodiments, the display device 200 provided in the embodiment of the present application can be connected to other displays as an input terminal or an output terminal through the first device interface 241 or the second device interface 242. When the display device 200 provided in the embodiment of the present application sends or receives HDMI signals sent by other displays, the image quality associated information of the sending end can be synchronously sent to the receiving end, and the receiving end can then set the image quality parameters according to the image quality associated information of the sending end, so that the sending end and the receiving end can maintain the same image quality effect, such as Fig.15 .

[0157] Based on the above display device 200, some embodiments of the present application also provide a method for synchronizing multi-screen image quality, which is applied to the display device 200 provided in the above embodiment, wherein the display device 200 includes a first display 261, a first device interface 241 and a controller 250; the first display 261 is configured to display a first user interface, the first device interface 241 is configured to connect to a second display 262, and the second display 262 is used to display a second user interface. Fig. 9 As shown, the method comprises the following procedural steps:

[0158] S901: In response to an access signal of the second display, reading extended display identification data of the second display;

[0159] S902: Querying a transmission protocol of the second display according to the extended display identification data;

[0160] S903: If the transmission protocol of the second display includes a picture quality synchronization protocol, obtain first picture quality associated information, where the first picture quality associated information is associated with a picture quality parameter of the first user interface;

[0161] S904: Sending the first image quality associated information to the second display based on the first device interface, so that the second display sets image quality parameters of the second user interface according to the first image quality associated information.

[0162] It can be seen from the above technical solutions that some embodiments of the present application provide a display device and a method for synchronizing multi-screen image quality, and the method can respond to the access signal of the second display and read the extended display identification data of the second display. Then query the transmission protocol of the second display based on the extended display identification data. If the transmission protocol of the second display includes a picture quality synchronization protocol, obtain the first picture quality associated information. Among them, the first picture quality associated information is associated with the picture quality parameters of the first user interface. Then, based on the first device interface, the first picture quality associated information is sent to the second display, so that the second display sets the picture quality parameters of the second user interface according to the first picture quality associated information. When the second display supports the picture quality synchronization protocol, the method sends data information associated with the picture quality parameters of the first user interface to the second display, so that the second display can present a second user interface with the same picture quality effect as the first user interface, thereby improving the problem that the picture quality effects between multiple screens cannot be synchronized.

[0163] The same and similar parts between the various embodiments in this specification can be referenced to each other and will not be described again here.

[0164] Those skilled in the art can clearly understand that the technology in the embodiments of the present invention can be implemented by means of software plus a necessary general hardware platform. Based on this understanding, the technical solution in the embodiments of the present invention is essentially or the part that contributes to the prior art can be embodied in the form of a software product, which can be stored in a storage medium such as ROM / RAM, a disk, an optical disk, etc., and includes a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods of various embodiments of the present invention or certain parts of the embodiments.

[0165] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

[0166] 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 limit the embodiments to the specific forms disclosed above. Based on the above teachings, various modifications and variations can be obtained. The selection and description of the above embodiments are to better explain the principles and practical applications, so that those skilled in the art can better use the embodiments and various different variations of the embodiments suitable for specific use considerations.

Claims

1. A display device, It is characterized in that include: A first display configured to display a first user interface; A first device interface is configured to connect to a second display, wherein the second display is used to display a second user interface; The controller is configured as: In response to the access signal of the second display, reading the extended display identification data of the second display; querying a transmission protocol of the second display according to the extended display identification data; If the transmission protocol of the second display includes a picture quality synchronization protocol, obtaining first picture quality associated information, where the first picture quality associated information is associated with a picture quality parameter of the first user interface; The first image quality associated information is sent to the second display based on the first device interface, so that the second display sets the image quality parameters of the second user interface according to the first image quality associated information.

2. The display device according to claim 1, It is characterized in that The first device interface is configured to form a display data channel, and the display data channel is used to transmit data information; the controller executes a transmission protocol for acquiring the second display according to the extended display identification data, and is configured to: Acquire the extended display identification data based on the display data channel; When the extended display identification data includes an extended display data block, reading a reference parameter of a target field in the extended display data block, the extended display identification data block is used to characterize that the second display includes an extended display data channel, and the extended display data channel is used to transmit extended data information; If the reference parameter is the same as the template parameter, marking the transmission protocol of the second display to include a picture quality synchronization protocol; If the reference parameter is different from the template parameter, the transmission protocol of the second display is marked as not including a picture quality synchronization protocol.

3. The display device according to claim 2, It is characterized in that The controller executes acquiring first image quality associated information and is configured to: Detecting a signal source channel and an image mode of the first user interface; Querying a first signal source mapping value of the signal source channel and a first mode mapping value of the image mode; Setting a target parameter of the extended data information according to the first signal source mapping value and the first mode mapping value, the target parameter being a parameter of a target address in the extended data information, and the target parameter being used to characterize the first image quality associated information; The extended data information is recorded.

4. The display device according to claim 3, It is characterized in that The controller executes sending the first image quality associated information to the second display, and is configured to: The extended data information is sent to the second display based on the extended display data channel, so that the second display sets the image quality parameters of the second user interface according to the target parameters.

5. The display device according to claim 3, It is characterized in that After the controller executes sending the first image quality associated information to the second display based on the first device interface, the controller is further configured to: In response to a disconnection signal of the second display, detecting an access signal of the second display during a target time period; If no access signal of the second display is detected during the target time period, clearing the extended data information; If a connection signal of the second display is detected during the target time period, extended data information is sent to the second display based on the extended display data channel.

6. The display device according to claim 3, It is characterized in that After the controller executes sending the first image quality associated information to the second display based on the first device interface, the controller is further configured to: In response to a first change event of a signal source channel, detecting a changed signal source channel, the changed signal source channel being the signal source channel after the first change event is executed; Querying a second signal source mapping value of the changed signal source channel; Refresh the target parameter according to the second signal source mapping value; The extended data information is sent to the second display based on the extended display data channel.

7. The display device according to claim 3, It is characterized in that After the controller executes sending the first image quality associated information to the second display based on the first device interface, the controller is further configured to: In response to a second image mode change event, detecting a changed image mode, the changed image mode being an image mode of the first user interface after the second change event is executed; Querying a second mode mapping value of the change signal source channel; Refresh the target parameter according to the second mode mapping value; The extended data information is sent to the second display based on the extended display data channel.

8. A display device, It is characterized in that include: a second display configured to display a second user interface; a second device interface configured to connect to a first display, wherein the first display is used to display a first user interface; The controller is configured as: In response to an access signal of the first display, receiving first image quality associated information based on the second device interface, the first image quality associated information being associated with an image quality parameter of the first user interface; Recording second image quality associated information, where the second image quality associated information is associated with an image quality parameter of the second user interface; Setting image quality parameters of the second user interface according to the first image quality associated information; When a disconnection signal of the first display is monitored, the image quality parameters of the second user interface are set according to the second image quality associated information.

9. The display device according to claim 8, It is characterized in that The controller is also configured to: Detecting a target parameter of the extended data information, where the extended data information is data information transmitted based on an extended display data channel, the target parameter is a parameter of a target address in the extended data information, and the target parameter is used to characterize the first image quality associated information; If the target parameter is an initial parameter, setting the image quality parameter of the second user interface according to the second image quality associated information; If the target parameter is not an initial parameter, the image quality parameter of the second user interface is set according to the target parameter.

10. A method for synchronizing image quality of multiple screens. It is characterized in that Applied to a display device, the display device comprises a first display, a first device interface and a controller; the first display is configured to display a first user interface, the first device interface is configured to connect to a second display, and the second display is used to display a second user interface; the method comprises: In response to the access signal of the second display, reading the extended display identification data of the second display; querying a transmission protocol of the second display according to the extended display identification data; If the transmission protocol of the second display includes a picture quality synchronization protocol, obtaining first picture quality associated information, where the first picture quality associated information is associated with a picture quality parameter of the first user interface; The first image quality associated information is sent to the second display based on the first device interface, so that the second display sets the image quality parameters of the second user interface according to the first image quality associated information.

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