A Volume Control Method for a Display Device and a Display Device

Abstract

This application discloses a volume control method for a display device and a display device, which are used to enable direct interaction between the display device and other devices within the same local area. The method includes: upon detecting that an application on the device has established a DIAL communication connection with an application on the other device, in response to a first control instruction sent by the other device, playing content displayed on the other device on the device; in response to a second control instruction sent by the other device, adjusting the playback volume of the device; and upon detecting that an application on the device has disconnected the established DIAL communication connection with an application on the other device, restoring the playback volume of the device to the volume before receiving the first control instruction.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a volume control method for a display device and a display device. Background Art

[0002] The main function of the DIAL (Discovery And Launch, DIAL for short) protocol is to discover and connect the application on the first-screen device in the application on the second-screen device, that is, the application on the second-screen device establishes a DIAL communication connection with the application on the first-screen device. Based on this, the user can control the first-screen device through the application on the second-screen device, for example, controlling the playback progress of multimedia content displayed on the first-screen device.

[0003] However, currently, the process of establishing DIAL communication connections between applications on different devices and the above-mentioned control process both rely on the application server as a communication bridge. This will result in the inability to implement the above-mentioned functions when the network status is poor or there is a problem with the connection between the application and the application server. Summary of the Invention

[0004] Embodiments of the present application provide a volume control method for a display device and a display device, so as to enable direct interaction between the display device and other devices in the same local area.

[0005] In a first aspect, a display device is provided, comprising:

[0006] a display for displaying a graphical user interface;

[0007] Controller, which performs:

[0008] When detecting that an application on the local device has established a DIAL communication connection with an application on another device, in response to a first control instruction sent by the other device, playing content displayed on the other device on the local device;

[0009] adjusting the playback volume of the present device in response to the second control instruction sent by the other device;

[0010] When it is detected that the application on the local device disconnects the established DIAL communication connection with the application on the other device, the local device restores the playback volume before receiving the first control instruction.

[0011] In some embodiments, the controller further executes:

[0012] In response to a connection request sent by the other device, if the connection request is legal, obtaining a random identification code from the connection request;

[0013] The obtained random identification code is sent to the other device, so that when the other device compares the random identification code sent by itself and finds that it is consistent with the received random identification code, it determines that its own application has established a DIAL communication connection with the application on the display device, and sends an indication message to the display device indicating that the DIAL communication connection has been established.

[0014] In some embodiments, the controller specifically performs:

[0015] In response to a second control instruction sent by the other device to increase the playback volume, checking whether the current playback volume of the local device is greater than a set first volume threshold;

[0016] If yes, discard the second control instruction for increasing the playback volume;

[0017] If not, the second control instruction for increasing the playback volume is executed.

[0018] In some embodiments, the controller further executes:

[0019] When it is detected that the current playback volume of the device is greater than the set first volume threshold, a prompt message for prompting that the playback volume exceeds the comfortable volume range is displayed on the display.

[0020] In some embodiments, the controller specifically performs:

[0021] In response to a second control instruction sent by the other device to instruct to lower the playback volume, checking whether the current playback volume of the current device is less than a set second volume threshold;

[0022] If yes, displaying a prompt message on the display to indicate that the playback volume is lower than the comfortable volume range, and executing the second control instruction instructing to lower the playback volume;

[0023] If not, the second control instruction for instructing to lower the playback volume is directly executed.

[0024] In some embodiments, the controller further executes:

[0025] Before responding to the first control instruction sent by the other device, recording the current signal channel;

[0026] When it is detected that the application on the local device disconnects the established DIAL communication connection with the application on the other device, the multimedia content provided by the recorded signal channel is played on the local device.

[0027] In a second aspect, a volume control method for a display device is provided, comprising:

[0028] When detecting that an application on the local device has established a DIAL communication connection with an application on another device, in response to a first control instruction sent by the other device, playing content displayed on the other device on the local device;

[0029] adjusting the playback volume of the present device in response to the second control instruction sent by the other device;

[0030] When it is detected that the application on the local device disconnects the established DIAL communication connection with the application on the other device, the local device restores the playback volume before receiving the first control instruction.

[0031] In some embodiments, the method further comprises:

[0032] In response to a connection request sent by the other device, if the connection request is legal, obtaining a random identification code from the connection request;

[0033] The obtained random identification code is sent to the other device, so that when the other device compares the random identification code sent by itself and finds that it is consistent with the received random identification code, it determines that its own application has established a DIAL communication connection with the application on the display device, and sends an indication message to the display device indicating that the DIAL communication connection has been established.

[0034] In some embodiments, adjusting the playback volume of the device in response to the second control instruction sent by the other device includes:

[0035] In response to a second control instruction sent by the other device to increase the playback volume, checking whether the current playback volume of the local device is greater than a set first volume threshold;

[0036] If yes, discard the second control instruction for increasing the playback volume;

[0037] If not, the second control instruction for increasing the playback volume is executed.

[0038] In some embodiments, the method further comprises:

[0039] When it is detected that the current playback volume of the device is greater than the set first volume threshold, a prompt message for prompting that the playback volume exceeds the comfortable volume range is displayed on the display.

[0040] In some embodiments, adjusting the playback volume of the device in response to the second control instruction sent by the other device includes:

[0041] In response to a second control instruction sent by the other device to instruct to lower the playback volume, checking whether the current playback volume of the current device is less than a set second volume threshold;

[0042] If yes, displaying a prompt message on the display to indicate that the playback volume is lower than the comfortable volume range, and executing the second control instruction instructing to lower the playback volume;

[0043] If not, the second control instruction for instructing to lower the playback volume is directly executed.

[0044] In some embodiments, the method further comprises:

[0045] Before responding to the first control instruction sent by the other device, recording the current signal channel;

[0046] When it is detected that the application on the local device disconnects the established DIAL communication connection with the application on the other device, the multimedia content provided by the recorded signal channel is played on the local device.

[0047] By applying the above embodiment, direct interaction between the display device and other devices in the same local area can be achieved without relying on the application server, which can improve the stability of the communication process and improve communication efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1A Schematic diagram showing an operation scenario between the display device 200 and the controller 100;

[0049] Figure 1B The example shown in Figure 1A A block diagram of the configuration of the control device 100;

[0050] Figure 1C The example shown in Figure 1A FIG. 2 is a block diagram showing a configuration of the display device 200;

[0051] Figure 1D exemplarily shows an architectural configuration block diagram of an operating system in the memory of the display device 200.

[0052] Figure 2A A schematic diagram of the display interface of the application on the second screen device;

[0053] Figure 2B A schematic diagram of another display interface applied on a second screen device;

[0054] Figure 3 Flowchart for establishing a DIAL communication connection between the DIAL Server application and the DIAL Client application;

[0055] Figure 4 A schematic diagram of a graphical user interface 400 for displaying content provided by a second screen device on a first screen device;

[0056] Figure 5 Schematic diagram of the process of establishing a DIAL communication connection between applications in this application;

[0057] Figure 6 This is a structural diagram of the DIAL Server side;

[0058] Figure 7 A flow chart of an embodiment of a volume control method for a display device according to the present application;

[0059] Figure 8 Schematic diagram of a graphical user interface 800 for providing content for a recorded signal channel. DETAILED DESCRIPTION

[0060] In order to make the purpose, technical solutions and advantages of the exemplary embodiments of the present application clearer, the technical solutions in the exemplary embodiments of the present application will be clearly and completely described below in combination with the drawings in the exemplary embodiments of the present application. Obviously, the described exemplary embodiments are only part of the embodiments of the present application, not all of the embodiments.

[0061] Based on the exemplary embodiments shown in this application, all other embodiments obtained by persons of ordinary skill in the art without inventive effort are within the scope of protection of this application. In addition, although the disclosure in this application is presented based on one or several exemplary examples, it should be understood that each aspect of the disclosure can independently constitute a complete technical solution.

[0062] As used in this application, the terms "include" and "have" 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 those components expressly listed but may include other components not expressly listed or inherent to the product or device.

[0063] The term "module" as used in this application refers to any known or later developed hardware, software, firmware, artificial intelligence, fuzzy logic, or combination of hardware and / or software code that is capable of performing the functions associated with that element.

[0064] The term "gesture" used in this application refers to a user's behavior of expressing an intended idea, action, purpose, or result through a change in hand shape or hand movement.

[0065] Figure 1A FIG. 1 is a schematic diagram showing an operation scenario between the display device 200 and the control apparatus 100. Figure 1A As shown, the control device 100 and the display device 200 can communicate with each other in a wired or wireless manner.

[0066] The control device 100 is configured to control the display device 200. It receives user input and converts the input into commands that the display device 200 can recognize and respond to, acting as an intermediary for interaction between the user and the display device 200. For example, when a user operates the channel increase or decrease keys on the control device 100, the display device 200 responds to the channel increase or decrease operation.

[0067] The control device 100 may be a remote controller 100A, which controls the display device 200 wirelessly or by wired means, including infrared communication, Bluetooth communication, or other short-range communication methods. A user may control the display device 200 by inputting commands via buttons on the remote controller, voice input, or control panel input. For example, a user may control the display device 200 by inputting corresponding control commands via the volume up / down keys, channel control keys, up / down / left / right movement keys, voice input keys, menu keys, or power button on the remote controller.

[0068] The control device 100 may also be a smart device, such as a mobile terminal 100B, a tablet computer, a computer, a laptop computer, etc. For example, an application running on the smart device is used to control the display device 200. The application can be configured to provide the user with various controls through an intuitive user interface (UI) on a screen associated with the smart device.

[0069] For example, mobile terminal 100B can install software applications on display device 200 and establish communication via a network communication protocol, achieving one-to-one control operations and data communication. For example, mobile terminal 100B can establish a control command protocol with display device 200, and by operating various function keys or virtual buttons on the user interface provided on mobile terminal 100B, the functions of the physical buttons on remote control 100A can be realized. Audio and video content displayed on mobile terminal 100B can also be transmitted to display device 200 to achieve synchronized display.

[0070] The display device 200 can be implemented as a television, which can provide broadcast reception television functions and computer support functions. Examples of display devices include digital television, network television, smart TV, Internet Protocol television (IPTV), etc.

[0071] The display device 200 may be a liquid crystal display, an organic light emitting display, or a projection display device, and the specific type, size, and resolution of the display device are not limited.

[0072] The display device 200 also communicates data with the server 300 through various communication methods. Here, the display device 200 may be allowed to communicate via a local area network (LAN), a wireless local area network (WLAN), and other networks. The server 300 may provide various content and interactions to the display device 200. For example, the display device 200 may send and receive information, such as receiving electronic program guide (EPG) data, receiving software program updates, or accessing a remotely stored digital media library. The server 300 may be a group or multiple groups, and may be one or more types of servers. Other network service content such as video on demand and advertising services is provided through the server 300.

[0073] Figure 1B exemplarily shows a configuration block diagram of the control device 100. Figure 1B As shown, the control device 100 includes a controller 110 , a memory 120 , a communicator 130 , a user input interface 140 , an output interface 150 , and a power supply 160 .

[0074] The controller 110 includes a random access memory (RAM) 111, a read-only memory (ROM) 112, a processor 113, a communication interface, and a communication bus. The controller 110 is used to control the operation and operation of the control device 100, as well as the communication and coordination between internal components and external and internal data processing functions.

[0075] For example, when an interaction of a user pressing a key arranged on the remote controller 100A or touching a touch panel arranged on the remote controller 100A is detected, the controller 110 may control generation of a signal corresponding to the detected interaction and send the signal to the display device 200 .

[0076] The memory 120 is used to store various operating programs, data, and applications for driving and controlling the control device 100 under the control of the controller 110. The memory 120 can store various control signal instructions input by the user.

[0077] Under the control of the controller 110, the communicator 130 realizes the communication of control signals and data signals with the display device 200. For example, the control device 100 sends a control signal (such as a touch signal or a button signal) to the display device 200 via the communicator 130, and the control device 100 can receive the signal sent by the display device 200 via the communicator 130. The communicator 130 may include an infrared signal interface 131 and a radio frequency signal interface 132. For example, in the case of an infrared signal interface, the user input instruction needs to be converted into an infrared control signal according to the infrared control protocol, and then sent to the display device 200 via the infrared sending module. For another example, in the case of a radio frequency signal interface, the user input instruction needs to be converted into a digital signal, and then modulated according to the radio frequency control signal modulation protocol, and then sent to the display device 200 by the radio frequency sending terminal.

[0078] The user input interface 140 may include at least one of a microphone 141 , a touchpad 142 , a sensor 143 , a button 144 , etc., so that the user can input user instructions for controlling the display device 200 to the control apparatus 100 through voice, touch, gesture, pressing, etc.

[0079] The output interface 150 outputs user commands received by the user input interface 140 to the display device 200, or outputs images or voice signals received by the display device 200. Here, the output interface 150 may include an LED interface 151, a vibration interface 152 for generating vibrations, a sound output interface 153 for outputting sound, and a display 154 for outputting images. For example, the remote control 100A may receive an output signal such as audio, video, or data from the output interface 150, and display the output signal as an image on the display 154, output it as audio on the sound output interface 153, or output it as vibration on the vibration interface 152.

[0080] The power supply 160 is used to provide operating power support for various components of the control device 100 under the control of the controller 110. It can be in the form of a battery and related control circuits.

[0081] Figure 1C exemplarily shows a hardware configuration block diagram of the display device 200. Figure 1C As shown, the display device 200 may further include a tuner and demodulator 210, a communicator 220, a detector 230, an external device interface 240, a controller 250, a memory 260, a user interface 265, a video processor 270, a display 275, an audio processor 280, an audio input interface 285, and a power supply 290.

[0082] The tuner-demodulator 210 receives broadcast television signals via wired or wireless means, and can perform modulation and demodulation processing such as amplification, mixing, and resonance, and is used to demodulate the audio and video signals carried in the frequency of the TV channel selected by the user, as well as additional information (such as EPG data) from multiple wireless or wired broadcast television signals.

[0083] Tuner 210 , based on user selection and controlled by controller 250 , responds to the frequency of the television channel selected by the user and the television signal carried on that frequency.

[0084] The tuner-demodulator 210 can receive signals in a variety of ways, depending on the broadcast format of the television signal, such as terrestrial broadcasting, cable broadcasting, satellite broadcasting, or Internet broadcasting; and can use digital modulation or analog modulation depending on the modulation type; and can demodulate analog signals and digital signals depending on the type of television signal received.

[0085] In some other exemplary embodiments, the tuner 210 may also be in an external device, such as an external set-top box, etc. In this way, the set-top box outputs a television signal after modulation and demodulation, and the signal is input to the display device 200 through the external device interface 240 .

[0086] Communicator 220 is a component used to communicate with external devices or external servers using various communication protocols. For example, display device 200 can send content data to an external device connected via communicator 220, or browse and download content data from an external device connected via communicator 220. Communicator 220 may include a network communication protocol module or a near-field communication protocol module, such as a WiFi module 221, a Bluetooth communication protocol module 222, or a wired Ethernet communication protocol module 223. Thus, communicator 220 can receive control signals from control device 100 under the control of controller 250 and implement the control signals as WiFi signals, Bluetooth signals, radio frequency signals, etc.

[0087] Detector 230 is a component of display device 200 that collects signals from the external environment or external interactions. Detector 230 may include an image collector 231, such as a camera, to capture external scenes and adaptively adjust display parameters of display device 200; as well as user attributes or gestures to enable interaction between the display device and the user. It may also include a light receiver 232 to capture ambient light intensity and adaptively adjust display parameters of display device 200.

[0088] In some other exemplary embodiments, the detector 230 may further include a temperature sensor. For example, by sensing the ambient temperature, the display device 200 may adaptively adjust the color temperature of the image displayed. For example, when the ambient temperature is relatively high, the color temperature of the image displayed by the display device 200 may be adjusted to a cooler color tone; when the ambient temperature is relatively low, the color temperature of the image displayed by the display device 200 may be adjusted to a warmer color tone.

[0089] In some other exemplary embodiments, the detector 230 may also include a sound collector, such as a microphone, which can be used to receive the user's voice, such as the voice signal of the user's control instructions for controlling the display device 200; or, it can collect environmental sounds for identifying the type of environmental scene, so that the display device 200 can adapt to the environmental noise.

[0090] External device interface 240 is a component that allows controller 210 to control data transmission between display device 200 and external devices. External device interface 240 can connect to external devices such as set-top boxes, game consoles, and laptop computers via wired or wireless communication, and can receive data from external devices such as video signals (e.g., moving images), audio signals (e.g., music), and additional information (e.g., EPG).

[0091] Among them, the external device interface 240 may include: a high-definition multimedia interface (HDMI) terminal 241, a composite video blanking synchronization (CVBS) terminal 242, an analog or digital component terminal 243, a universal serial bus (USB) terminal 244, a component terminal (not shown in the figure), a red, green and blue (RGB) terminal (not shown in the figure), etc., any one or more.

[0092] The controller 250 controls the operation of the display device 200 and responds to user operations by running various software control programs (such as an operating system and various application programs) stored in the memory 260.

[0093] like Figure 1C As shown, the controller 250 includes a random access memory (RAM) 251, a read-only memory (ROM) 252, a graphics processor 253, a CPU processor 254, a communication interface 255, and a communication bus 256. The RAM 251, the ROM 252, the graphics processor 253, the CPU processor 254, and the communication interface 255 are connected via the communication bus 256.

[0094] ROM 252 is used to store various system startup instructions. For example, upon receiving a power-on signal, the display device 200 starts up, and the CPU 254 executes the system startup instructions in ROM 252, copying the operating system stored in memory 260 to RAM 251 to start the operating system. After the operating system is started, the CPU 254 copies various application programs from memory 260 to RAM 251, and then starts running the various application programs.

[0095] The graphics processor 253 is used to generate screen images of various graphical objects, such as icons, images, and operation menus. The graphics processor 253 may include an operator for performing operations based on various interactive instructions input by the user, thereby displaying various objects according to display attributes; and a renderer for generating various objects based on the output of the operator and displaying the rendered results on the display 275.

[0096] The CPU processor 254 is used to execute the operating system and application instructions stored in the memory 260 and to process various applications, data, and content according to received user input instructions, so as to ultimately display and play various audio and video contents.

[0097] In some exemplary embodiments, the CPU processor 254 may include multiple processors. The multiple processors may include a main processor and multiple or one sub-processors. The main processor is used to perform some initialization operations of the display device 200 in the display device preload mode and / or to display images in the normal mode. The multiple or one sub-processors are used to perform an operation in the display device standby mode or other states.

[0098] The communication interface 255 may include a first interface to an nth interface, which may be a network interface connected to an external device via a network.

[0099] The controller 250 may control the overall operation of the display device 200. For example, in response to receiving a user input command for selecting a GUI object displayed on the display 275, the controller 250 may perform an operation related to the object selected by the user input command.

[0100] The object may be any one of the selectable objects, such as a hyperlink or an icon. The operation related to the selected object may be, for example, an operation of displaying a page, document, image connected to the hyperlink, or an operation of executing a program corresponding to the icon. The user input command for selecting the GUI object may be a command inputted through various input devices (e.g., a mouse, keyboard, touchpad, etc.) connected to the display device 200 or a voice command corresponding to a user's spoken voice.

[0101] Memory 260 is used to store various types of data, software programs, or applications that drive and control the operation of display device 200. Memory 260 may include volatile and / or non-volatile memory. The term "memory" includes memory 260, RAM 251 and ROM 252 of controller 250, or a memory card in display device 200.

[0102] In some embodiments, the memory 260 is specifically used to store the running program that drives the controller 250 in the display device 200; store various applications built into the display device 200 and downloaded by the user from an external device; store data such as visual effect images for configuring various GUIs provided by the display 275, various objects related to the GUI, and selectors for selecting GUI objects.

[0103] In some embodiments, the memory 260 is specifically used to store drivers and related data for the tuner and demodulator 210, the communicator 220, the detector 230, the external device interface 240, the video processor 270, the display 275, the audio processor 280, etc., external data received from the external device interface (such as audio and video data) or user data received by the user interface (such as key information, voice information, touch information, etc.).

[0104] In some embodiments, the memory 260 specifically stores software and / or programs representing an operating system (OS). These software and / or programs may include, for example, a kernel, middleware, an application programming interface (API), and / or an application. For example, the kernel may control or manage system resources, as well as functions implemented by other programs (such as the middleware, API, or application). Furthermore, the kernel may provide an interface to allow the middleware, API, or application to access a controller to control or manage system resources.

[0105] Figure 1D exemplarily shows an architecture configuration block diagram of an operating system in the memory of the display device 200. The operating system architecture comprises an application layer, a middleware layer, and a kernel layer from top to bottom.

[0106] The application layer, which includes both built-in and non-system applications, is responsible for direct user interaction. This layer can include multiple applications, such as Netflix, Settings, and Media Center. These applications can be implemented as web applications, running on the WebKit engine. Specifically, they can be developed and executed using HTML, Cascading Style Sheets (CSS), and JavaScript.

[0107] Here, HTML, the full name of which is HyperText Markup Language, is a standard markup language used to create web pages. It describes web pages through markup tags. HTML tags are used to describe text, graphics, animations, sounds, tables, links, etc. The browser will read the HTML document, interpret the content of the tags in the document, and display it in the form of a web page.

[0108] CSS, short for Cascading Style Sheets, is a computer language used to represent the styles of HTML files. It can be used to define style structures such as fonts, colors, and positions. CSS styles can be stored directly in HTML pages or in separate style files to control the styles of the web pages.

[0109] JavaScript is a language used for web page programming. It can be inserted into HTML pages and interpreted and executed by the browser. The interactive logic of web applications is implemented through JavaScript. JavaScript can encapsulate JavaScript extension interfaces through the browser to achieve communication with the kernel layer.

[0110] The middleware layer can provide standardized interfaces to support operations in various environments and systems. For example, the middleware layer can be implemented as Multimedia and Hypermedia Information Coding Experts Group (MHEG) middleware related to data broadcasting, as DLNA middleware related to communication with external devices, or as middleware that provides a browser environment for applications running on display devices.

[0111] The kernel layer provides core system services, such as file management, memory management, process management, network management, system security and permission management, etc. The kernel layer can be implemented as a kernel based on various operating systems, for example, a kernel based on the Linux operating system.

[0112] The kernel layer also provides communication between system software and hardware, and provides device driver services for various hardware, such as: providing display drivers for monitors, camera drivers for cameras, key drivers for remote controls, WiFi drivers for WiFi modules, audio drivers for audio output interfaces, and power management drivers for power management (PM) modules.

[0113] User interface 265 receives various user interactions. Specifically, it is used to send user input signals to controller 250, or transmit output signals from controller 250 to the user. For example, remote control 100A can send user input signals such as power on / off signals, channel selection signals, and volume adjustment signals to user interface 265, which then forwards them to controller 250. Alternatively, remote control 100A can receive output signals such as audio, video, or data from user interface 265 after being processed by controller 250, and display the received output signals or output them as audio or vibration.

[0114] In some embodiments, the user may input a user command via a graphical user interface (GUI) displayed on the display 275, and the user interface 265 may receive the user input command via the GUI. Specifically, the user interface 265 may receive a user input command for controlling the position of a selector in the GUI to select different objects or items.

[0115] Alternatively, the user may input a user command by inputting a specific sound or gesture, and the user interface 265 recognizes the sound or gesture through a sensor to receive the user input command.

[0116] The video processor 270 is used to receive external video signals and perform video data processing such as decompression, decoding, scaling, noise reduction, frame rate conversion, resolution conversion, and image synthesis according to the standard codec protocol of the input signal, and can obtain a video signal that is directly displayed or played on the display 275.

[0117] For example, the video processor 270 includes a demultiplexing module, a video decoding module, an image synthesis module, a frame rate conversion module, a display formatting module, and the like.

[0118] Among them, the demultiplexing module is used to demultiplex the input audio and video data stream. For example, if the input MPEG-2 stream (a compression standard for moving images and voice based on digital storage media) is input, the demultiplexing module will demultiplex it into video signals and audio signals, etc.

[0119] The video decoding module is used to process the demultiplexed video signal, including decoding and scaling.

[0120] The image synthesis module, such as an image synthesizer, is used to superimpose and mix the GUI signal generated by the graphics generator according to user input or itself with the scaled video image to generate an image signal for display.

[0121] The frame rate conversion module is used to convert the frame rate of the input video, such as converting the frame rate of the input 60Hz video to a frame rate of 120Hz or 240Hz. The usual format is implemented by a frame interpolation method.

[0122] The display formatting module is used to change the signal output by the frame rate conversion module into a signal that conforms to the display format of a display, such as converting the signal output by the frame rate conversion module into an RGB data signal.

[0123] Display 275 is used to receive image signals output from video processor 270 and display videos, images, and menu control interfaces. For example, the display can display video from broadcast signals received by tuner / demodulator 210, video input from communicator 220 or external device interface 240, and images stored in memory 260. Display 275 also displays a user interface (UI) generated by display device 200 and used to control display device 200.

[0124] Furthermore, the display 275 may include a display screen component for presenting images and a driving component for driving image display. Alternatively, if the display 275 is a projection display, it may also include a projection device and a projection screen.

[0125] The audio processor 280 is used to receive external audio signals and perform decompression and decoding according to the standard codec protocol of the input signal, as well as audio data processing such as noise reduction, digital-to-analog conversion, and amplification to obtain an audio signal that can be played in the speaker 286.

[0126] For example, the audio processor 280 may support various audio formats, such as MPEG-2, MPEG-4, Advanced Audio Coding (AAC), High Efficiency AAC (HE-AAC), and the like.

[0127] The audio output interface 285 is used to receive audio signals output from the audio processor 280. For example, the audio output interface can output audio from a broadcast signal received via the tuner / demodulator 210, audio input via the communicator 220 or the external device interface 240, or audio stored in the memory 260. The audio output interface 285 may include a speaker 286 or an external audio output terminal 287 for outputting to an external device, such as a headphone output terminal.

[0128] In some other exemplary embodiments, the video processor 270 may include one or more chips. The audio processor 280 may also include one or more chips.

[0129] Furthermore, in some other exemplary embodiments, the video processor 270 and the audio processor 280 may be separate chips, or may be integrated with the controller 250 into one or more chips.

[0130] The power supply 290 is used to provide power supply support for the display device 200 using power input from an external power source under the control of the controller 250. The power supply 290 can be a built-in power supply circuit installed inside the display device 200 or a power supply installed outside the display device 200.

[0131] With the development of technology and the continuous improvement of user needs, many manufacturers are striving to promote multi-screen interaction, such as interaction between TV and mobile phones, allowing users to directly control the TV using their mobile phones, such as adjusting the TV volume, adjusting the TV's audio and video playback progress, switching the TV's image mode, etc.

[0132] In some embodiments, multi-screen interaction can be achieved between the TV and the mobile phone based on the DIAL protocol. The main function of the DIAL protocol is to discover and connect the application on the first screen device in the application on the second screen device, that is, the application on the second screen device establishes a DIAL communication connection with the application on the first screen device. The first screen device mentioned here usually refers to a large-screen device, such as a TV, and the second screen device refers to a small-screen device, such as a mobile phone. It should be understood that there is no strict limitation on the first screen device and the second screen device. It should be noted that the application mentioned here refers to an application that supports the DIAL protocol (hereinafter referred to as an application), such as YouTube, Netflix, etc.

[0133] The DIAL protocol consists of two key terms: DIAL Server and DIAL Client. In some embodiments, the DIAL Server is integrated into the first-screen device, or into an application on the first-screen device, to implement the DIAL server. The DIAL Client is integrated into an application on the second-screen device, to implement the DIAL client. Therefore, when the first-screen device and the second-screen device implement multi-screen interaction based on the DIAL protocol, this is actually achieved through interaction between the DIAL Server and the DIAL Client.

[0134] In some embodiments, the process of discovering and connecting to the application on the first screen device in the application on the second screen device is as follows:

[0135] First, start the application on the second screen device, that is, the application on the DIAL Client side, for example, start YouTube. Exemplarily, the user can start the application by triggering the application icon on the second screen device.

[0136] Next, if the application on the first screen device, that is, the application on the DIAL Server side, has not been started, you can start the DIAL Server side application first. Figure 2A The following is a schematic diagram of the display interface of the application on the second screen device. In practice, the user can trigger Figure 2A The icon 210 on the display interface shown in the figure, when the icon 210 is triggered, it means that the user intends to control the application startup on the first screen device through the second screen device. At this time, the second screen device will display the following Figure 2B The example display interface.

[0137] like Figure 2B As shown, the display interface includes a list, which displays all the devices that support the DIAL function and are located in the same local area network as the second-screen device and are found by the second-screen device using the DIAL device search function. Accordingly, the user can select a device in the list, such as "H-Roku TV", and the device selected by the user is the first-screen device to be controlled. At this time, the second-screen device sends a control instruction to the first-screen device selected by the user to start the application. It can be understood that, in fact, the second-screen device sends a control instruction to the DIALServer on the first-screen device via the DIAL Client to start the application.

[0138] In some embodiments, after the DIAL Server, i.e., the first-screen device, receives a control instruction instructing the launch of an application, it first verifies the legitimacy of the control instruction. For example, it verifies whether the application indicated by the control instruction is a registered application on the local device. If so, the control instruction is determined to be legitimate, and the application can be launched in response to the control instruction. If not, the control instruction is determined to be illegitimate, and the control instruction can be discarded. For example, assuming that the registered applications on the DIAL Server include Netflix and YouTube, then if the application indicated by the control instruction is Amazon, the control instruction is determined to be illegitimate; if the application indicated by the control instruction is Netflix, the control instruction is determined to be legitimate.

[0139] After the DIAL Server application is started, the DIAL Server application and the DIAL Client application can communicate with each other through Figure 3 The process shown establishes a DIAL communication connection.

[0140] like Figure 3As shown, the DIAL Client (i.e., the second-screen device) sends a connection request to the DIAL Server (i.e., the first-screen device). The connection request carries a pairing code. After receiving the connection request, the DIAL Server obtains the pairing code from it and generates a URL address based on the pairing code. For example, the URL address carries the pairing code. The DIAL Server then sends the generated URL address to the application server (the application server is the server corresponding to the application). The application server parses the received URL address to obtain the pairing code. Based on the pairing code, a DIAL communication connection is established between the application on the DIAL Client and the application on the DIAL Server.

[0141] It should be noted that, in some embodiments, the DIAL Client may also carry the pairing code in the control instruction instructing the application to start, so that the application start-up and the establishment of the DIAL communication connection on the DIAL Server can be completed in one go.

[0142] In some embodiments, after a DIAL communication connection is established between the DIAL Server application and the DIAL Client application, the DIAL Client application can push the currently displayed content to the DIAL Server, so as to display the graphical user interface of the content provided by the second screen device on the DIAL Server, i.e., the first screen device. For example, Figure 4 , which is a schematic diagram of a graphical user interface 400 for displaying content provided by a second screen device on a first screen device.

[0143] In some embodiments, for certain specific applications, such as YouTube, after the application on the second-screen device establishes a DIAL communication connection with the application on the first-screen device, the user can also control the first-screen device through the application on the second-screen device, such as adjusting the playback volume of the first-screen device, audio and video playback progress, switching image modes, etc.

[0144] However, whether the second screen device pushes multimedia content to the first screen device or controls the first screen device through the application on the second screen device, it is the same as Figure 3 The connection process in the example is similar, and it needs to rely on the application server as a communication bridge between the DIAL Client and the DIAL Server. That is, the DIAL Client needs to send control instructions to the application server, and the application server interacts with the DIAL Server based on the control instructions to implement the operations corresponding to the control instructions, such as controlling the first-screen device to play the content currently displayed on the second-screen device, adjusting the playback volume of the first-screen device, etc.

[0145] Therefore, the current interaction between DIAL Client and DIAL Server, including the connection process and the process of controlling the first-screen device where DIAL Server is located through the DIAL Client application, all needs to rely on the application server as a communication bridge. This will result in the inability to achieve interaction between DIAL Client and DIAL Server when the network status is poor or there is a problem with the connection between the application and the application server.

[0146] Based on this, the present application provides a volume control method for a display device. In this method, the display device can serve as the above-mentioned first screen device. Through this method, other devices in the same local area network as the display device, such as the smart device 100B, can directly control the playback volume of the display device without the need for an application server, thereby improving the stability of the communication process and improving communication efficiency.

[0147] The following first introduces how to establish an inter-application DIAL communication connection between the display device and other devices in the same local area network in the volume control method of the display device provided by this application:

[0148] See also Figure 5 , which is a schematic diagram of the process of establishing a DIAL communication connection between applications in this application, including the following steps:

[0149] Step 51: Other devices send connection requests to the display device.

[0150] In some embodiments, other devices, such as smart devices, can generate a random identification code using the device model and application version number.

[0151] Step 52: After receiving the connection request, the display device verifies whether the connection request is legal.

[0152] As for how to verify whether the connection request is legal, please refer to the relevant description above and will not be repeated here.

[0153] Step 53: When the display device verifies that the connection request is legal, it obtains a random identification code from the connection request.

[0154] Step 54: When the display device verifies that the connection request is illegal, it rejects the connection request.

[0155] Step 55: The display device sends the obtained random identification code to other devices.

[0156] Step 56: The other device compares the random identification code sent by itself with the random identification code received to see if they are consistent.

[0157] Step 57 : When the random identification code sent by the other device is compared and found to be consistent with the received random identification code, the other device determines that a DIAL communication connection has been established between its own application and the application on the display device and sends an indication message to the display device indicating that the DIAL communication connection has been established.

[0158] Depend on Figure 5 As can be seen from the process shown, the method provided by this application can enable display devices and other devices in the same local area network to communicate directly without relying on an application server, thereby establishing a DIAL communication connection between the applications of both parties.

[0159] The following combination Figure 6 The structural diagram of the DIAL Server side as an example shows how, in the volume control method of the display device provided in this application, when the application on the display device has established a DIAL communication connection with the application on the other device, the playback volume of the display device can be controlled by the other device:

[0160] Other devices send control commands to the display device. The DIAL Server integrated on the display device listens to the control command through mongoose, and then parses the control command through the "DIAL service" module and verifies whether the control command is legal. If the control command is verified to be legal, the callback function of the specific application is called to execute the control command. For example, Figure 6 In this example, "yt_callbacks" refers to YouTube's callback function, and "nf_callbacks" refers to Netflix's callback function. When the "DIAL Service" module calls a specific application's callback function, it connects the application to the system platform through DIAL Server's built-in interfaces, such as the "DIAL Interface" module and the Application Management Module (APM).

[0161] In some embodiments, in addition to the verification method described above, verifying whether the control instruction is legal may also include verifying whether the specific operation corresponding to the control instruction is a DIAL Server registration operation. If so, the control instruction is determined to be legal; otherwise, the control instruction is illegal. For example, DIAL Server registration operations include adjusting device volume and adjusting device playback mode. In this case, if the specific operation corresponding to the control instruction is adjusting playback progress, the control instruction is determined to be illegal; if the specific operation corresponding to the control instruction is adjusting device volume, the control instruction is determined to be legal.

[0162] As can be seen from the above description, the method provided by this application can enable display devices and other devices in the same local area network to interact directly without relying on an application server as a communication bridge, thereby improving the stability and efficiency of controlling the display device through applications on other devices and enhancing the user experience.

[0163] The following describes the method provided by this application:

[0164] See also Figure 7 , is a flow chart of an embodiment of a volume control method for a display device of the present application, comprising the following steps:

[0165] Step 71: When it is detected that a DIAL communication connection has been established between an application on the local device and an application on another device, in response to a first control instruction sent by the other device, the display content on the other device is played on the local device.

[0166] In some embodiments, when an application on a display device has established a DIAL communication connection with an application on another device, a user may send a first control instruction to the display device through the application on the other device to instruct the display device to play the display content on the other device.

[0167] In some embodiments, when the other device detects that a DIAL communication connection has been established between its own application and the application on the display device, the other device may automatically send a first control instruction to the display device to instruct the display device to play the display content on the other device.

[0168] Illustratively, the first control instruction may carry the content currently displayed by the application on other devices.

[0169] For example, Figure 4 , which is a schematic diagram of a graphical user interface 400 for playing content displayed on other devices on a display device.

[0170] Step 72: In response to the second control instruction sent by the other device, adjust the playback volume of the device.

[0171] In some embodiments, in order to prevent the user's misoperation from causing the playback volume of the display device to continue to increase, affecting the user experience, it is proposed to set a comfortable volume range on the display device, such as 30 to 70dB. Based on this, after the display device determines that it has received a second control instruction for instructing to adjust the playback volume, if the second control instruction is used to instruct to increase the playback volume, the display device can check whether the current playback volume is greater than the set first volume threshold, such as 70dB. If not, the display device executes the second control instruction; if so, it means that the current playback volume of the display device is high, so a prompt message is displayed on the display to prompt the user that the current playback volume of the display device exceeds the comfortable volume range; further, as an optional implementation method, the display device can also discard the second control instruction to avoid excessive volume affecting the user experience.

[0172] If the second control instruction is used to instruct to lower the playback volume, the display device can check whether the current playback volume is less than a set second volume threshold, such as 30dB. If not, the display device executes the second control instruction. If so, it means that the current playback volume of the display device is low, and therefore a prompt message is displayed on the display to remind the user that the current playback volume of the display device is below the comfortable volume range. Furthermore, as an optional implementation, the display device can also discard the second control instruction or execute the second control instruction.

[0173] Step 73: When it is detected that the application on the device disconnects the connected DIAL communication connection with the application on the other device, the device restores the playback volume before receiving the first control instruction.

[0174] The process of disconnecting the DIAL communication connection between the DIAL Client application and the DIAL Server application is as follows:

[0175] In some embodiments, the user may first close the DIAL Client application. After the application is closed, the DIAL Client may send a disconnect request to the DIAL Server. Upon receiving the disconnect request, the DIAL Server executes the application exit process to close the application.

[0176] In some embodiments, the user can also directly close the application on the DIAL Server side. For example, the user can press the "exit key" on the control device 100A to send a control instruction to the display device 200 (that is, the display device 200 serves as the first screen device) to close the application, and the display device 200 closes the application in response to the control instruction.

[0177] In some embodiments, after the DIAL Server application is closed, the DIAL Client application is not automatically closed. For example, an indication message indicating that the DIAL connection has been disconnected may be displayed on the display interface of the DIAL Client application.

[0178] In some embodiments, due to different media formats, the sound effects will also be different. Therefore, the user's requirements for the playback volume when the display device plays multimedia content provided by different signal sources will also be different. For example, when watching live TV, the user is accustomed to setting the playback volume of the display device to 40dB, and when watching multimedia content provided by other devices through the display device, the user is accustomed to setting the playback volume of the display device to 60dB. Accordingly, the present application also proposes that the display device can record the current signal channel and the current playback volume before receiving the first control instruction sent by other devices. On this basis, when the display device detects that the application on this device and the application on other devices disconnect the established DIAL communication connection, the signal source can be switched back to the channel between the established DIAL communication connection, that is, a graphical user interface of the content provided by the recorded signal channel is displayed on the display, for example, Figure 8 As shown, a schematic diagram of a graphical user interface 800 for providing content for a recorded signal channel and adjusting the playback volume to the playback volume before establishing the DIAL communication connection, that is, adjusting the playback volume to the recorded playback volume, for example, automatically adjusting the playback volume from 60dB to 40dB.

[0179] Those skilled in the art will appreciate that these embodiments can save user operations and improve user experience.

[0180] It can be seen from the above embodiments that the method provided by this application can realize direct interaction between the display device and other devices in the same local area without relying on the application server, which can improve the stability of the communication process and improve communication efficiency.

[0181] Although the preferred embodiments of the present application have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present application.

[0182] Obviously, those skilled in the art may make various changes and modifications to this application without departing from the spirit and scope of this application. Thus, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalents, this application is intended to include these modifications and variations.

Claims

1. A display device, characterized in that: The display device supports the DIAL protocol, including: a display for displaying a graphical user interface; Controller, which performs: Upon detecting that a DIAL communication connection has been established between an application on the local device and an application on another device, in response to a first control instruction sent by the other device, calling a callback function of the application on the local device to execute the first control instruction, and playing content displayed on the other device on the local device, wherein the first control instruction carries the content currently displayed by the application on the other device; In response to the second control instruction sent by the other device, calling a callback function of the application on the local device to execute the second control instruction and adjust the playback volume of the local device; When detecting that the application on the device disconnects the established DIAL communication connection with the application on the other device, the device restores the playback volume before receiving the first control instruction; The controller further executes: In response to a connection request sent by the other device, if the connection request is legal, obtaining a random identification code from the connection request; The obtained random identification code is sent to the other device, so that when the other device compares the random identification code sent by itself and finds that it is consistent with the received random identification code, it determines that its own application has established a DIAL communication connection with the application on the display device, and sends an indication message to the display device indicating that the DIAL communication connection has been established.

2. The display device according to claim 1, wherein The controller specifically performs: In response to a second control instruction sent by the other device to increase the playback volume, checking whether the current playback volume of the local device is greater than a set first volume threshold; If yes, displaying a prompt message on the display indicating that the playback volume exceeds the comfortable volume range, and discarding the second control instruction instructing to increase the playback volume; If not, the second control instruction for increasing the playback volume is executed.

3. The display device according to claim 1, wherein The controller specifically performs: In response to a second control instruction sent by the other device to instruct to lower the playback volume, checking whether the current playback volume of the current device is less than a set second volume threshold; If yes, displaying a prompt message on the display to indicate that the playback volume is lower than the comfortable volume range, and executing the second control instruction instructing to lower the playback volume; If not, the second control instruction for instructing to lower the playback volume is directly executed.

4. The display device according to claim 1, wherein The controller further executes: Before responding to the first control instruction sent by the other device, recording the current signal channel; When it is detected that the application on the local device disconnects the established DIAL communication connection with the application on the other device, the multimedia content provided by the recorded signal channel is played on the local device.

5. A volume control method for a display device, characterized in that: The display device supports the DIAL protocol, including: In response to a connection request sent by another device, if the connection request is legitimate, obtaining a random identification code from the connection request; Sending the obtained random identification code to the other device, so that when the other device compares the random identification code sent by itself and the received random identification code and finds that it is consistent, it determines that its application has established a DIAL communication connection with the application on the display device, and sends an indication message to the display device indicating that the DIAL communication connection has been established; Upon detecting that a DIAL communication connection has been established between an application on the local device and an application on another device, in response to a first control instruction sent by the other device, calling a callback function of the application on the local device to execute the first control instruction, and playing content displayed on the other device on the local device, wherein the first control instruction carries the content currently displayed by the application on the other device; In response to the second control instruction sent by the other device, calling a callback function of the application on the local device to execute the second control instruction and adjust the playback volume of the local device; When it is detected that the application on the local device disconnects the established DIAL communication connection with the application on the other device, the local device restores the playback volume before receiving the first control instruction.

6. The method according to claim 5, characterized in that The adjusting the playback volume of the device in response to the second control instruction sent by the other device includes: In response to a second control instruction sent by the other device to increase the playback volume, checking whether the current playback volume of the local device is greater than a set first volume threshold; If yes, displaying a prompt message on the display to indicate that the playback volume exceeds the comfortable volume range, and discarding the second control instruction instructing to increase the playback volume; If not, the second control instruction for increasing the playback volume is executed.

7. The method according to claim 5, characterized in that The adjusting the playback volume of the device in response to the second control instruction sent by the other device includes: In response to a second control instruction sent by the other device to instruct to lower the playback volume, checking whether the current playback volume of the current device is less than a set second volume threshold; If yes, displaying a prompt message on the display to prompt that the playback volume is lower than the comfortable volume range, and executing the second control instruction instructing to reduce the playback volume; If not, the second control instruction for instructing to lower the playback volume is directly executed.

8. The method according to claim 5, characterized in that The method further comprises: Before responding to the first control instruction sent by the other device, recording the current signal channel; When it is detected that the application on the local device disconnects the established DIAL communication connection with the application on the other device, the multimedia content provided by the recorded signal channel is played on the local device.

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