Display device and external device power supply method

Abstract

Some embodiments of the present application provide a display device and an external device power supply method. The display device can detect a voltage signal state through a power supply pin. Based on detecting that the voltage signal state represents that the external device does not send a voltage signal, the display device obtains an external device connection state of a data transmission interface through a hot plug pin. If the external device connection state represents that the data transmission interface is connected with the external device, the display device supplies power to the external device through the data transmission interface, so that the external device can also start normally when not connected with an external power supply.

Description

Technical Field

[0001] This application relates to the field of display device technology, and in particular to a power supply method for a display device and an external device. Background Technology

[0002] Display devices refer to terminal devices that can output specific display images. Display devices can realize two-way human-computer interaction functions and integrate multiple functions such as audio-visual, entertainment, and data to meet the diverse and personalized needs of users.

[0003] Users can control the display device to perform various functions, such as playing media assets. The display device can also connect to external devices for data exchange. The display device may have a device interface, such as a High-Definition Multimedia Interface (HDMI), for connecting to external devices. Set-top boxes also have HDMI interfaces for connecting to the display device. The set-top box can transmit media asset signals corresponding to various media channels to the display device, which can then play these channels for user viewing.

[0004] Set-top boxes can be connected to an external power source to power on and operate, enabling data interaction with display devices. However, for the set-top box to function properly, it must be properly connected to an external power source. Therefore, users may need to check the connection status of the external power source and the set-top box when turning on the set-top box, which is a cumbersome process and provides a poor user experience. Summary of the Invention

[0005] This application provides a power supply method for display devices and external devices to solve the problem in related technologies where users need to detect the connection between the external power supply and the set-top box when turning on the set-top box, which is cumbersome and results in a poor user experience.

[0006] In a first aspect, some embodiments of this application provide a display device, including a display, a data transmission interface, and a controller. The data transmission interface is configured to connect to an external device. The data transmission interface includes a hot-plug pin and a power supply pin. The hot-plug pin is used to detect the connection status of the external device to the data transmission interface, and the power supply pin is used to detect a voltage signal sent by the external device. The controller is configured to:

[0007] The voltage signal status is detected through the power supply pin; the voltage signal status is used to characterize whether the external device sends a voltage signal to the display device through the power supply pin.

[0008] Based on the detected voltage signal state indicating that the external device is not sending a voltage signal, the connection status of the external device of the data transmission interface is obtained through the hot-plug pin;

[0009] If the external device connection status indicates that an external device is connected to the data transmission interface, then the control display device supplies power to the external device through the data transmission interface;

[0010] If the external device connection status indicates that the data transmission interface is not connected to an external device, then the control display device will not supply power to the data transmission interface.

[0011] The above technical solution offers the following advantages: The display device can detect the voltage signal status through the power supply pin to determine whether an external device has sent a voltage signal to the display device via the power supply pin. When the external device does not send a voltage signal, the display device can obtain the connection status of the external device at the data transmission interface through the hot-swap pin to determine whether an external device is connected at the data transmission interface. If an external device is connected at the data transmission interface, the display device can supply power to the external device through the data transmission interface, enabling the external device to power on and start normally even without an external power supply.

[0012] In some embodiments, the system further includes a voltage detection unit configured to connect to the hot-swappable pin.

[0013] The controller is configured to obtain the external device connection status of the data transmission interface through the hot-plug pin.

[0014] Detect the node input voltage at the connection node between the hot-plug pin and the voltage detection unit;

[0015] If the node input voltage is not the initial voltage, then the external device connection status is marked as an external device being connected to the data transmission interface;

[0016] If the node input voltage is the initial voltage, then the external device connection status is marked as the data transmission interface is not connected to an external device.

[0017] The above technical solution has the following beneficial effects: by detecting whether the voltage at the connection node between the hot-swappable pin and the voltage detection unit changes, it can be determined whether the data transmission interface is connected to an external device.

[0018] In some embodiments, if the external device connection status indicates that an external device is connected to the data transmission interface, the controller is further configured to:

[0019] The node input voltage and a preset voltage threshold are detected.

[0020] If the node input voltage is less than or equal to the voltage threshold, the step of controlling the display device to supply power to the external device through the data transmission interface is executed. If the node input voltage is greater than the voltage threshold, the display is controlled to show a first prompt message; the first prompt message is used to prompt the external device to connect to a power source.

[0021] The above technical solution has the following beneficial effects: by detecting the relationship between the input voltage of the detection node and the voltage threshold, it can be determined whether the voltage supplied by the display device to the set-top box supports the normal operation of the set-top box. If it does not support the normal operation of the set-top box, the user is prompted to connect the power supply of the set-top box.

[0022] In some embodiments, the voltage detection unit includes a first resistor and a second resistor connected together, the connection node of the first resistor and the second resistor being connected to the hot-swappable pin; the first resistor is connected to a power supply, and the second resistor is grounded.

[0023] The above technical solution has the following beneficial effects: the voltage detection unit can detect the voltage division of the external device connected to the data transmission interface. If a change in voltage division is detected, it indicates that an external device is connected to the data transmission interface.

[0024] In some embodiments, before the controller performs the detection of voltage signal status via the power supply pin, it is further configured to:

[0025] In response to a power-on command, the display device is controlled to enter the power-on state, and the power supply is controlled to input voltage to the voltage detection unit. The initial input voltage of the power supply to the first resistor is acquired.

[0026] Based on the first resistor and the second resistor, calculate the voltage division value of the second resistor with respect to the initial input voltage, and mark the voltage division value as the initial voltage.

[0027] The above technical solution has the following beneficial effects: when no external device is connected via HDMI, the first resistor and the second resistor in the voltage detection unit are connected in series, and the voltage drop across the second resistor is marked as the initial voltage.

[0028] In some embodiments, after the controller controls the display device to supply power to an external device through the data transmission interface, it is further configured to:

[0029] The device parameter acquisition command is sent to the external device through the data transmission interface; the device parameter acquisition command is used to cause the external device to feed back device parameters to the display device.

[0030] Receive and detect device parameters sent by the external device; the device parameters include power parameters;

[0031] If the power parameters indicate that the external device has a power interface, the display device is controlled to stop supplying power to the external device, and the display is controlled to show a first prompt message; the first prompt message is used to prompt the external device to connect to a power source.

[0032] If the power parameters indicate that the external device does not have a power interface, the control display device continues to supply power to the external device through the data transmission interface.

[0033] The above technical solution has the following beneficial effects: when the external device is detected to have a power interface, it prompts the user to connect the power supply of the external device to ensure the stable operation of the set-top box.

[0034] In some embodiments, after the controller controls the display device to supply power to an external device through the data transmission interface, it is further configured to:

[0035] The voltage signal status is detected through the power supply pin;

[0036] Based on the absence of detected voltage signal from the external device, the control display device continues to supply power to the external device through the data transmission interface;

[0037] Based on the detected voltage signal sent by the external device, the display is controlled to show a power supply type interface; the power supply type interface includes external device power supply controls and display device power supply controls;

[0038] In response to the selection of the power supply control for the display device, the display is controlled to show a second prompt message; the second prompt message is used to prompt the external device to disconnect the power supply; in response to the selection of the power supply control for the external device, the display device is controlled to stop supplying power to the external device.

[0039] The above technical solution has the following beneficial effects: when it is detected that the external power supply and the display device are simultaneously supplying power to the set-top box, the user is prompted to select a power supply method to ensure the safety of the set-top box.

[0040] In some embodiments, a power switch and a power supply module connected together are also included. The power supply module is configured to connect to the power supply pins of the data transmission interface.

[0041] The controller controls the display device to supply power to external devices through the data transmission interface, specifically configured as follows:

[0042] The power supply switch is kept closed, and the power supply module is controlled to input a preset voltage to the power supply pin to supply power to external devices through the data transmission interface.

[0043] The controller is configured to prevent the display device from supplying power to the data transmission interface.

[0044] The power supply switch is kept in the off state.

[0045] Secondly, some embodiments of this application provide a display device, including a data transmission interface and a controller. The data transmission interface is configured to connect to an external device. The controller is configured to:

[0046] The voltage signal status is detected through the power supply pin, and the external device connection status of the data transmission interface is obtained through the hot-swappable pin; the voltage signal status is used to characterize whether the external device sends a voltage signal to the display device through the power supply pin.

[0047] Based on the detection that the voltage signal status indicates that the external device is not sending a voltage signal, and the external device connection status indicating that the data transmission interface is connected to an external device, the control display device supplies power to the external device through the data transmission interface;

[0048] Based on the detection of the voltage signal status indicating that the external device has sent a voltage signal, and / or the external device connection status indicating that the data transmission interface is not connected to an external device, the control display device does not supply power to the data transmission interface.

[0049] Thirdly, some embodiments of this application provide a method for powering an external device, the method comprising:

[0050] The voltage signal status is detected through the power supply pin; the voltage signal status is used to characterize whether the external device sends a voltage signal to the display device through the power supply pin.

[0051] Based on the detected voltage signal state indicating that the external device is not sending a voltage signal, the connection status of the external device of the data transmission interface is obtained through hot-plugging pins;

[0052] If the external device connection status indicates that an external device is connected to the data transmission interface, then the control display device supplies power to the external device through the data transmission interface;

[0053] If the external device connection status indicates that the data transmission interface is not connected to an external device, then the control display device will not supply power to the data transmission interface.

[0054] As can be seen from the above technical solutions, some embodiments of this application provide a power supply method for a display device and an external device. The display device can detect the voltage signal status through the power supply pin. Based on the detected voltage signal status indicating that the external device is not sending a voltage signal, the display device obtains the external device connection status of the data transmission interface through the hot-swap pin. If the external device connection status indicates that the data transmission interface is connected to an external device, the display device supplies power to the external device through the data transmission interface, so that the external device can be powered on and started normally even when no external power supply is connected. Attached Figure Description

[0055] To more clearly illustrate the technical solution of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0056] Figure 1 This is a schematic diagram illustrating an operational scenario between a display device and a control device provided in some embodiments of this application;

[0057] Figure 2 Provided for some embodiments of this application Figure 1 Hardware configuration block diagram of the display device;

[0058] Figure 3 The diagram shows the software configuration in the display device in some embodiments;

[0059] Figure 4 Schematic diagrams of user interfaces in some embodiments are shown;

[0060] Figure 5 A schematic diagram of the application panel in some embodiments is shown;

[0061] Figure 6 The diagram shows connection diagrams of the display device and external devices in some embodiments;

[0062] Figure 7 Schematic diagrams of set-top box connection to display devices are shown in some embodiments;

[0063] Figure 8 Interaction diagrams of the HDMI interface are shown in some embodiments;

[0064] Figure 9 The diagrams show the interaction flowcharts of various components of the display device in some embodiments;

[0065] Figure 10 Schematic diagrams of voltage detection units in some embodiments are shown;

[0066] Figure 11Schematic diagrams of HDMI interfaces for display devices and external devices in some embodiments are shown;

[0067] Figure 12 Schematic diagrams of the power supply module in some embodiments are shown;

[0068] Figure 13 A schematic diagram showing the display of a first prompt message in some embodiments is shown;

[0069] Figure 14 A schematic diagram of the power supply type interface in some embodiments is shown;

[0070] Figure 15 A schematic diagram showing the display of a second prompt message in some embodiments is shown. Detailed Implementation

[0071] The embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described below do not represent all embodiments consistent with this application. They are merely examples of systems and methods consistent with some aspects of this application as detailed in the claims.

[0072] It should be noted that the brief descriptions of terms in this application are only for the convenience of understanding the embodiments described below, and are not intended to limit the embodiments of this application. Unless otherwise stated, these terms should be understood in their ordinary and common meaning.

[0073] The terms "first," "second," "third," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar or related objects or entities, and do not necessarily imply a specific order or sequence, unless otherwise specified. It should be understood that such terms are interchangeable where appropriate.

[0074] The terms “comprising” and “having”, and any variations thereof, are intended to cover but not exclude inclusion, for example, a product or device that includes a range of components is not necessarily limited to all of the components that are clearly listed, but may include other components that are not clearly listed or that are inherent to such product or device.

[0075] The term "module" refers to any known or subsequently developed hardware, software, firmware, artificial intelligence, fuzzy logic, or combination of hardware and / or software code that is capable of performing the functions associated with that element.

[0076] In this embodiment, the display device 200 generally refers to a device with screen display and data processing capabilities. For example, the display device 200 includes, but is not limited to, smart TVs, mobile terminals, computers, monitors, advertising screens, wearable devices, virtual reality devices, augmented reality devices, etc.

[0077] Figure 1 This is a schematic diagram illustrating an operational scenario between a display device and a control device provided in some embodiments of this application. For example... Figure 1 As shown, a user can operate the display device 200 via touch operation, a mobile terminal 300, and a control device 100. The control device 100 receives user input commands and converts them into control commands that the display device 200 can recognize and respond to. For example, the control device 100 can be a remote control, a stylus, a gamepad, etc.

[0078] The mobile terminal 300 can function as a control device for human-computer interaction between the user and the display device 200. It can also function as a communication device for establishing a communication connection with the display device 200 and exchanging data. In some embodiments, the mobile terminal 300 can have software applications installed on it and communicate with the display device 200 via network communication protocols to achieve one-to-one control and data communication. Furthermore, it can transmit audio and video content displayed on the mobile terminal 300 to the display device 200 for synchronized display.

[0079] In some embodiments, the mobile terminal 300 or other electronic devices may also simulate the functions of the control device 100 by running an application that controls the display device 200.

[0080] like Figure 1 The diagram also shows that the display device 200 communicates with the server 400 via various communication methods. This allows the display device 200 to communicate via a local area network (LAN), a wireless local area network (WLAN), and other networks.

[0081] Display device 200 can provide broadcast television reception function, and can also be equipped with intelligent network television function that provides computer support, including but not limited to network television, smart television, Internet Protocol television (IPTV), etc.

[0082] Figure 2 Provided for some embodiments of this application Figure 1 The hardware configuration block diagram of the display device.

[0083] In some embodiments, the display device 200 may include at least one of a tuner 210, a communication device 220, a detector 230, a device interface 240, a controller 250, a display 260, an audio output device 270, a memory, a power supply, and a user input interface.

[0084] In some embodiments, detector 230 is used to acquire signals from the external environment or to interact with the outside world. For example, detector 230 includes a light receiver, a sensor for acquiring ambient light intensity; or, detector 230 includes an image acquisition device, such as a camera, which can be used to acquire external environmental scenes, user attributes, or user interaction gestures; or, detector 230 includes a sound acquisition device, such as a microphone, for receiving external sounds.

[0085] In some embodiments, the display 260 includes display function components for presenting images and driving components for driving image display. The display 260 is used to receive and display image signals output from the controller 250. For example, the display 260 can be used to display video content, image content, menu control interface components, and user control UI interfaces, etc.

[0086] In some embodiments, the communication device 220 is a component used to communicate with external devices or the server 400 according to various communication protocol types. The display device 200 may have multiple communication devices 220 depending on the supported communication methods. For example, when the display device 200 supports wireless network communication, it may have a communication device 220 with WiFi functionality. When the display device 200 supports Bluetooth connectivity, it needs to have a communication device 220 with Bluetooth functionality.

[0087] The communication device 220 enables the display device 200 to communicate with external devices or the server 400 via wireless or wired connections. Wired connections utilize data cables, interfaces, or other components to connect the display device 200 to external devices. Wireless connections utilize wireless signals or wireless networks. The display device 200 can directly establish a connection with external devices or indirectly through gateways, routers, or other connection devices.

[0088] In some embodiments, the controller 250 may include at least one of a central processing unit, a video processor, an audio processor, a graphics processor, and a power processor, and a first to an nth interface for input / output. The controller 250 controls the operation of the display device and responds to user operations through various software control programs stored in memory. The controller 250 controls the overall operation of the display device 200.

[0089] In some embodiments, the controller 250 and the tuner 210 may be located in different separate devices, that is, the tuner 210 may also be located in an external device of the main device where the controller 250 is located, such as an external set-top box.

[0090] In some embodiments, a user can input user commands through a graphical user interface (GUI) displayed on a display 260, and the user input interface receives user input commands through the graphical user interface (GUI).

[0091] In some embodiments, the audio output device 270 can be a built-in speaker of the display device 200 or an external audio output device connected to the display device 200. For the external audio output device connected to the display device 200, the display device 200 may also be provided with an external audio output terminal, through which the audio output device can be connected to the display device 200 to output sound from the display device 200.

[0092] In some embodiments, the user input interface 280 can be used to receive instructions from user input.

[0093] To enable user interaction, in some embodiments, the display device 200 may run an operating system. The operating system is a computer program used to manage and control the hardware and software resources of the display device 200. The operating system can control the display device to provide a user interface; for example, the operating system can directly control the display device to provide a user interface, or it can provide a user interface by running an application. The operating system also allows users to interact with the display device 200.

[0094] It should be noted that the operating system can be a native operating system based on a specific operating platform, a third-party operating system that is deeply customized based on a specific operating platform, or an independent operating system specifically developed for display devices.

[0095] Operating systems can be divided into different modules or levels based on the functions they implement. Figure 3 A software configuration diagram of the display device is shown in some embodiments. For example... Figure 3 As shown, in some embodiments, the system is divided into four layers, from top to bottom: the Applications layer (referred to as the "Application Layer"), the Application Framework layer (referred to as the "Framework Layer"), the System Library layer, and the Kernel layer.

[0096] In some embodiments, the application layer provides services and interfaces for applications, enabling the display device 200 to run applications and interact with the user based on the applications. The application layer may contain at least one application, which may be a built-in Windows program, system settings program, or clock program of the operating system; or it may be an application developed by a third-party developer. In specific implementations, the application packages in the application layer are not limited to the examples above.

[0097] The framework layer provides application programming interfaces (APIs) and a programming framework for applications. The application framework layer includes predefined functions. It acts as a central processing unit, determining the actions taken by applications within the application layer. Through the API, applications can access system resources and obtain system services during execution.

[0098] like Figure 3 As shown, the application framework layer in this embodiment includes a view system, managers, and content providers. The view system designs and implements the application's interface and interactions, and includes lists, grids, text boxes, and buttons. The managers include at least one of the following modules: an activity manager for interacting with all running activities 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 application packages 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 widgets on the user interface.

[0099] In some embodiments, the Activity Manager manages the lifecycle of individual applications and common navigation and back functions, such as controlling application exit, opening, and back actions. The Window Manager manages all window programs, such as obtaining the screen size, determining if a status bar is present, locking the screen, capturing the screen, and controlling changes to the display window, such as shrinking the display window, shaking the display, or distorting the display.

[0100] In some embodiments, the system runtime library layer can provide support for the framework layer. When the framework layer is used, the operating system runs the instruction library contained in the system runtime library layer, such as the C / C++ instruction library, to implement the functions to be performed by the framework layer.

[0101] In some embodiments, the kernel layer is a functional layer situated between the hardware and software of the display device 200. The kernel layer can implement functions such as hardware abstraction, multitasking, and memory management. For example, ... Figure 3 As shown, hardware drivers can be configured in the kernel layer. The drivers included in the kernel layer can be at least one of the following: 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.

[0102] It should be noted that the above examples are merely a simple division of operating system functions and do not limit the specific form of the operating system of the display device 200 in this application embodiment. Depending on the function of the display device, the type of operating system, and other factors, the number of levels and the specific level type of the operating system may be expressed in other forms.

[0103] Display device 200 can have various functions, such as browsing web pages, playing media, playing games, and screen mirroring, thereby providing users with a variety of services. Users can control display device 200 to launch a relevant application, thereby enabling the corresponding function.

[0104] In some embodiments, when the user controls the display device to power on, the controller 250 can control the display 260 to display the user interface. The user interface can be a specific target image, such as various media resources obtained from a network signal source, including videos, pictures, and other content. The user interface can also be some UI interfaces of the display device, such as the system main interface, various control interfaces of applications installed on the display device, etc.

[0105] Figure 4 Schematic diagrams of user interfaces from some embodiments are shown. For example... Figure 4As shown, the user interface includes a first navigation bar 400, a second navigation bar 410, a function bar 420, and a content display area 430. The function bar 420 includes multiple function controls such as "Viewing History," "My Favorites," and "My Applications." Users can access the application panel page by clicking the "My Applications" control. Users can view the applications installed on the display device 200 through the application panel, i.e., the functions supported by the display device 200. It should be noted that the applications installed on the display device 200 can be system applications or third-party applications. Users control the display device 200 to perform the corresponding functions of an application by opening it.

[0106] Figure 5 Schematic diagrams of the application panel in some embodiments are shown. For example... Figure 5 As shown, the application panel includes three controls: "Browser," "Web Media Assets," and "Screen Casting." Users can click the "Browser" control to open a browser application on the display device 200 to browse various web pages. Users can click the "Web Media Assets" control to view various web media assets on the display device 200. Users can click the "Screen Casting" control to activate the screen casting function on the display device 200.

[0107] In some embodiments, the display device 200 can connect to an external device via a device interface 240. The device interface 240 can be a data transmission interface, through which the display device 200 can send data to and receive data sent by the external device to play content provided by the external device. The data transmission interface can be a video transmission interface and / or an audio transmission interface, such as an HDMI interface.

[0108] The display device 200 and the external device, which establish a communication connection, act as the receiver (sink) and the transmitter (source), respectively. The external device can transmit data to the display device 200 through the device interface 240, sending media asset signals to the display device 200. Different external devices can support different functions; for example, a gaming device can provide multiple game applications, and a set-top box can provide media asset channel content.

[0109] The display device 200 and the external device have data interfaces with the same interface specification and function. Figure 6 The diagram illustrates the connection between the display device and external devices in some embodiments. For example... Figure 6As shown, the display device 200 and the external device may be equipped with HDMI (High Definition Multimedia Interface). Users can plug both ends of the HDMI cable into the display device 200 and the external device respectively, thereby enabling data transmission between the display device 200 and the external device.

[0110] To achieve communication between the display device 200 and external devices, other connection methods can be used, such as DVI (Digital Visual Interface), VGA (Video Graphics Array), and USB (Universal Serial Bus); wireless connection methods can also be used, such as wireless LAN, Bluetooth, and infrared. Different communication connection methods can employ different information transmission protocols. For example, when using an HDMI interface for connection, the HDMI transmission protocol can be used for data transmission.

[0111] In some embodiments, the external device connected to the display device may be a set-top box device, which can provide media asset data to the display device, and the display device displays the media asset data to the user.

[0112] Figure 7 Schematic diagrams illustrating the connection between a set-top box and a display device are shown in some embodiments. For example... Figure 7 As shown, the set-top box can access the IPTV (Internet Protocol Television) service line via DSL (Digital Subscriber Line) or Ethernet. It then converts the media streams transmitted through the IPTV network into multimedia signals and outputs them to the display device 200, enabling various functions such as live TV, video-on-demand, and web browsing. IPTV provides on-demand or multicast media asset services over an IP-based network, involving technologies at the support, service, bearer, and access layers, as well as audio and video encoding / decoding, streaming, content distribution, multicast, and DRM technologies.

[0113] In some embodiments, the interface between the set-top box and the IPTV network includes an authentication interface, a payment interface, and a service usage interface. The authentication interface includes network layer authentication and application layer authentication, which is the process by which an internet user accesses the internet. For example, network layer access authentication methods can be PPPoE and DHCP+Web. Application layer authentication is the authentication process of the set-top box within the IPTV network; only users who pass application layer authentication can use the services provided by IPTV.

[0114] Figure 8 The diagram illustrates the interaction of the HDMI interface in some embodiments. For example... Figure 8 As shown, in some embodiments, the set-top box can be connected to the display device 200 via an HDMI interface. In this case, the set-top box acts as the transmitter, and the display device 200 acts as the receiver.

[0115] When the transmitter and receiver are connected, the transmitter pulls up a 5V voltage through the HDMI interface, allowing the 5V voltage to be simultaneously applied to the receiver. For example, when the transmitter's HDMI interface is connected to the receiver, the transmitter applies 5V to the receiver through pin 18 (PWR_CON_PIN18) of the HDMI interface. This way, even if the receiver is not powered on, the transmitter can still read the receiver's EDID (Extended Display Identification Data) through the HDMI interface.

[0116] After detecting a stable 5V voltage signal, the receiving end prepares the HDCP key and EDID file, and pulls the HPD (HotPlug Detection) signal high. HDCP (High-bandwidth Digital Content Protection) is a content protection technology capable of data encryption and authorization verification; each device has a pre-set key for performing this verification.

[0117] Upon detecting an HPD high, the receiving end performs HDCP verification and reads the receiving end's EDID via the HDMI interface's DDC (Display Data Channel). The EDID includes device-related information such as resolution, refresh rate, and color support. The transmitting end then uses the data in the EDID to transmit audio and video signals to the receiving end via the TMDS (Transition Minimized Differential Signaling) data channel and TMDS clock channel in the HDMI interface, enabling the receiving end to play or display the transmitting end's audio and video signals. The TMDS data channel transmits the RGB data of each pixel, and the TMDS clock channel maintains the necessary timing for transmission.

[0118] like Figure 8As shown, the HDMI interface also includes a CEC (Consumer Electronics Control) pin. This CEC pin can form a CEC channel for HDMI-CEC communication between the transmitter and receiver. HDMI-CEC communication supports bidirectional communication and control between the transmitter and receiver via the HDMI interface, such as power on / off, volume adjustment, and input source switching, thus enabling device co-control between the transmitter and receiver. HDMI-CEC communication includes specific command and message formats for communication and control between the transmitter and receiver. Different devices have a unique address to identify the transmitter and receiver. For example, a set-top box can send broadcast and unicast commands via the CEC pin of the HDMI interface to communicate with the display device 200.

[0119] In some embodiments, the set-top box device may be equipped with an external power supply to power the set-top box. The set-top box may be equipped with a power interface, and after connecting an external power source through the power interface, the set-top box can be powered on and operate normally, thereby interacting with the display device for data exchange.

[0120] It should be noted that for the set-top box to function properly, it must be connected to an external power source. Therefore, users need to check the connection status between the external power source and the set-top box when using the set-top box to ensure that the set-top box can be turned on normally. The operation of checking the external power source is rather cumbersome and provides a poor user experience.

[0121] Furthermore, with the development of set-top boxes, portable set-top box devices have emerged, but these do not come with an external power supply. Therefore, when such a set-top box is connected to a display device, it may not power on properly. Users can purchase a power adapter or other equipment to power the set-top box. However, this significantly increases the user's purchase cost, and the set-top box still requires an external power source, making operation complex and reducing its portability.

[0122] To address the aforementioned issues, the display device provided in this application embodiment can have an external device power supply function. The display device can detect the voltage signal status through a data transmission interface to determine whether an external device has sent a voltage signal to the display device through the data transmission interface. When no voltage signal is detected from the external device, the display device can obtain the connection status of the external device at the data transmission interface. If an external device is connected to the data transmission interface, the display device can supply power to the external device through the data transmission interface, enabling the external device to power on and start normally even without an external power supply.

[0123] Figure 9The diagram illustrates the interaction flowcharts of various components of the display device in some embodiments, including the following steps:

[0124] S901. Detect the voltage signal status through the power supply pin; the voltage signal status is used to characterize whether the external device sends a voltage signal to the display device through the power supply pin;

[0125] S902. Based on the detected voltage signal state indicating that the external device has not sent a voltage signal, the connection status of the external device of the data transmission interface is obtained through the hot-plug pin;

[0126] S903. If the external device connection status indicates that the data transmission interface is connected to an external device, then control the display device to supply power to the external device through the data transmission interface.

[0127] If the external device connection status indicates that the data transmission interface is not connected to an external device, then the control display device will not supply power to the data transmission interface.

[0128] In this embodiment, the HDMI interface is used as an example for data transmission.

[0129] In some embodiments, the external device can be connected to the display device 200 via an HDMI interface. Specifically, the HDMI interface of the set-top box is connected to the HDMI interface of the display device 200 for data exchange, etc. This embodiment uses a set-top box as an example of the external device.

[0130] After the set-top box is connected to an external power source, the user can control the set-top box to turn on, and the set-top box can send media data signals to the display device 200. Pin 18 of the HDMI interface (also referred to as the power supply pin in this embodiment) can transmit voltage signals. When the set-top box and the display device 200 provide an HDMI interface connection, the power supply pin of the set-top box's HDMI interface is connected to the power supply pin of the display device 200's HDMI interface.

[0131] After an external power source supplies power to the set-top box, the set-top box can send a voltage signal to the power supply pin of the HDMI interface of the display device 200 through its own HDMI interface power supply pin. After detecting the voltage signal sent by the external device, the display device 200 can interact with the set-top box to receive the media data signals sent by the set-top box.

[0132] It should be noted that while the set-top box is powered by an external power source, it can operate normally. Therefore, the set-top box can send voltage signals to the display device 200 via the HDMI interface. However, the display device 200 will not send voltage signals to the set-top box; that is, the set-top box is entirely powered by an external power source. However, when the set-top box is not equipped with an external power source, or when the external power source is not supplying power to the set-top box, the set-top box cannot operate normally, and in this case, the set-top box will not send voltage signals to the display device 200 via the HDMI interface.

[0133] Therefore, the display device 200 can detect whether the external device has sent a voltage signal through the HDMI interface to determine whether the set-top box is currently operating normally, and thus decide whether to supply power to the set-top box.

[0134] After the display device 200 is powered on, the controller 250 can detect whether the external device has sent a voltage signal through the HDMI interface.

[0135] In some embodiments, the controller 250 can detect the voltage signal status via a power supply pin. In this embodiment, the voltage signal status is used to characterize whether an external device has sent a voltage signal to the display device via the power supply pin, i.e., whether the external device has sent a voltage signal to the HDMI interface. For example, the voltage signal status could indicate that the external device has sent a voltage signal, or that the external device has not sent a voltage signal.

[0136] Therefore, the controller 250 can determine whether the set-top box device has sent a voltage signal to the display device 200 by using the voltage signal status.

[0137] If the controller 250 detects a voltage signal sent by an external device, indicating that the external device is sending a voltage signal, it means that the external device is currently in normal operation, and therefore the display device 200 does not need to supply power to it. The controller 250 can control the display device 200 and the set-top box to interact directly, so that the set-top box can send media asset signals to the display device 200, and the display device 200 can play the media asset signals for the user to watch.

[0138] In some embodiments, if the controller 250 does not detect a voltage signal sent by an external device, i.e., the voltage signal status indicates that the external device is not sending a voltage signal, it means that no external device in normal operating condition is connected to the display device 200. In this case, a set-top box may be connected to the HDMI interface, but the set-top box is not operating normally, i.e., the set-top box is not powered by an external power source, so the display device 200 can supply power to the set-top box. Alternatively, no external device may be connected to the HDMI interface, i.e., no set-top box is connected to the HDMI interface of the display device 200.

[0139] Therefore, the controller 250 can detect whether an external device is connected to the HDMI interface. The controller 250 can detect the connection status of the external device to the data transmission interface, i.e., whether an external device is connected to the data transmission interface, through the hot-swap pins of the data transmission interface.

[0140] The controller 250 can obtain the connection status of external devices to the data transmission interface through hot-swappable pins.

[0141] If the external device connection status indicates that an external device is connected to the data transmission interface, the controller 250 can control the display device to supply power to the external device through the data transmission interface.

[0142] If the external device connection status indicates that the data transmission interface is not connected to an external device, the controller 250 controls the display device not to supply power to the data transmission interface.

[0143] In some embodiments, the display device 200 includes a voltage detection unit connected to the hot-plug pin of the HDMI interface. In this embodiment, pin 19 (Hot Plug Detect, HPDET) of the HDMI interface is referred to as the hot-plug pin. The controller 250 can detect the HDMI interface through the voltage detection unit and the hot-plug pin to determine the connection status of an external device, i.e., whether an external device is connected to the HDMI interface.

[0144] Figure 10 Schematic diagrams of voltage detection units in some embodiments are shown. For example... Figure 10 As shown, the voltage detection unit includes a first resistor R5 and a second resistor R6, which are connected in series to form a series circuit. One end of the first resistor R5 is connected to a power supply, allowing the power supply to input a voltage, denoted as V_Detect. The other end of the first resistor R5 is connected to one end of the second resistor R6. The other end of the second resistor R6 is grounded, denoted as GND in the diagram. After the power supply inputs a voltage to the first resistor R5, the first resistor R5 and the second resistor R6 divide the voltage.

[0145] The connection node between the first resistor and the second resistor, i.e. Figure 10 The node corresponding to ADC_IN in the HDMI interface is connected to the hot-swappable pin of the HDMI interface. In this embodiment, the node at the connection between the HDMI interface and the voltage detection unit is referred to as the connection node.

[0146] The controller 250 can detect the voltage division value at the connection node, referred to as the node input voltage in this embodiment. The node input voltage is the voltage division value of the second resistor R6 with respect to the voltage V_Detect. By detecting this node input voltage, the controller 250 can determine whether an external device is connected to the HDMI interface.

[0147] Figure 11 Schematic diagrams of the HDMI interfaces of the display device 200 and external devices in some embodiments are shown. For example... Figure 11 As shown, when the external device is connected to the display device 200 via an HDMI interface, the hot-plug pin 19 of the external device's HDMI interface XS2 and the hot-plug pin 19 of the display device 200's HDMI interface XS3 will be connected. The external device includes a third resistor R7, one end of which is connected to the external device's HDMI interface XS2, and the other end of which is grounded.

[0148] After the power supply in display device 200 inputs voltage to the first resistor R5, the voltage signal is divided by the first resistor R5 and then transmitted to the second resistor R6. Simultaneously, the voltage signal is also transmitted through pin 19 of the display device 200's HDMI interface XS3 to pin 19 of the external device's HDMI interface XS2, and continues to the third resistor R7. Therefore, the second resistor R6 and the third resistor R7 are connected in parallel. Figure 11 The equivalent circuit relationship of the first resistor R5, the second resistor R6, and the third resistor R7 is also shown. After generating the equivalent circuit, the second resistor R6 and the third resistor R7 are first connected in parallel, and the equivalent resistance after parallel connection is then connected in series with the first resistor R5.

[0149] It should be noted that when no external device is connected to the HDMI interface, the voltage V_Detect is divided by the first resistor R5 and the second resistor R6. After an external device is connected to the HDMI interface, the voltage V_Detect is divided by the first resistor R5 and the parallel resistor (i.e., the equivalent resistance of the second resistor R6 and the third resistor R7 connected in parallel). Since the resistance value of the parallel resistor is always less than that of the second resistor R6, the voltage division value of the first resistor R5 increases, and the voltage division value of the second resistor R6 decreases. That is, the voltage division value ADC_IN at the connection node will decrease.

[0150] Therefore, when the controller 250 detects a change in the node input voltage, it indicates that an external device is connected to the HDMI interface.

[0151] In some embodiments, the controller 250 can detect the node input voltage of the connection node between the HDMI interface and the voltage detection unit.

[0152] In this embodiment, when the HDMI interface is not connected to an external device, the voltage division value of the second resistor R6 across the voltage V_Detect is referred to as the initial voltage. The controller 250 can detect whether the node input voltage and the initial voltage are equal, thereby determining whether the HDMI interface is connected to an external device.

[0153] If the node input voltage is not the initial voltage, that is, the voltage division value of the second resistor R6 on the voltage V_Detect changes, it indicates that an external device is connected to the HDMI interface. The controller 250 can mark the external device connection status as an external device connected to the data transmission interface. At this time, the display device 200 can be controlled to supply power to the external device through the HDMI interface.

[0154] If the node input voltage is the initial voltage, that is, the voltage division value of the second resistor R6 on the voltage V_Detect has not changed, it means that no external device is connected at the HDMI interface. The controller 250 can mark the external device connection status as the data transmission interface is not connected to an external device. At this time, the display device 200 can be controlled not to supply power to the HDMI interface.

[0155] In some embodiments, the controller 250 may detect the initial voltage.

[0156] In response to a power-on command, the controller 250 can control the display device 200 to enter the power-on state. After the display device 200 enters the power-on state, the controller 250 can control the power supply to input voltage to the voltage detection unit.

[0157] The controller 250 can obtain the initial input voltage from the power supply input to the first resistor, i.e., the voltage V_Detect.

[0158] Based on the first and second resistors, the controller 250 can calculate the voltage division value of the initial input voltage by the second resistor. Since the first resistor R5 and the second resistor R6 are connected in series, the voltage ratio of the voltage divided by the first resistor R5 and the second resistor R6 is the resistance ratio.

[0159] The voltage division value of the second resistor with respect to the initial input voltage can be expressed as: V_Detect×R6 / (R5+R6).

[0160] The controller 250 can mark this voltage division value as the initial voltage.

[0161] In some embodiments, the display device 200 is provided with a power supply module, which can supply power to external devices.

[0162] The power supply module can connect to the power supply pin of the HDMI interface, thereby inputting voltage to the power supply pin. After transmission through the power supply pin, the voltage can be input to the external device connected to the HDMI interface, thus providing power to the external device.

[0163] The controller 250 can control the power supply module to input a preset voltage to the power supply pin. The preset voltage can be 5V, so as to supply power to external devices through the HDMI interface.

[0164] The display device 200 may be equipped with a power switch to control whether the power supply module supplies power to the data transmission interface.

[0165] The controller 250 can control the power supply switch to remain closed and control the power supply module to input a preset voltage to the power supply pin so as to supply power to external devices through the data transmission interface.

[0166] The controller 250 can control the power supply switch to remain in the off state, thereby preventing the display device from supplying power to the data transmission interface.

[0167] In some embodiments, the power supply module can always provide voltage, and a power switch is connected between the power supply module and the power supply pins of the HDMI interface. By adjusting the power switch to the on or off state, it is possible to control whether the power supply module inputs voltage to the HDMI interface.

[0168] In some embodiments, the power switch may be in the form of a control circuit, thereby controlling whether the power supply module can output voltage.

[0169] Figure 12 Schematic diagrams of the power supply module in some embodiments are shown. For example... Figure 12 As shown, the power supply module is D1, and the power switch is D2. The power supply module provides voltage to the HDMI interface, and the power switch controls whether the voltage transmission unit provides voltage.

[0170] The power supply module D1 includes a 5V_Monitor power input terminal and a 5V_to_STB output terminal. The power input terminal can provide a 5V voltage. The output terminal's node S connects to the power supply pin of the HDMI interface, thereby inputting a 5V voltage to the HDMI interface.

[0171] The power switch D2 includes a control terminal Power_Control and a first MOSFET Q1. The control terminal Power_Control can be connected to the controller 250, which controls the power switch D2 to determine whether the power supply module D1 inputs voltage to the HDMI interface.

[0172] When power is needed to supply power to external devices, the control terminal can output a high level, which turns on the second MOSFET Q2 of the power supply module D1, allowing the power supply module D1 to input 5V voltage to the HDMI interface. When power is not needed to supply power to external devices, the control terminal can remain at a low level, which turns off the second MOSFET Q2, preventing the power supply module D1 from inputting voltage to the HDMI interface.

[0173] In some embodiments, considering that the resistance value of the third resistor R7 of the set-top box varies depending on the type of set-top box, the voltage value required to supply the set-top box during normal operation will also be different. For example, some set-top boxes may require a 5V power supply, while others may require a 12V power supply.

[0174] Since the display device 200 can output 5V via the HDMI interface, the voltage provided by the display device 200 may not be sufficient for all set-top boxes to operate normally. Therefore, after detecting that a set-top box is connected to the HDMI interface, the controller 250 can also detect whether the voltage provided by the display device 200 is sufficient for the set-top box to operate normally.

[0175] After detecting the node input voltage of the connection node between the HDMI interface and the voltage detection unit, if the node input voltage is not the initial voltage, the controller 250 can also detect the node input voltage and the preset voltage threshold.

[0176] The HDMI interface can output 5V, so the voltage division value at the connection node when a set-top box powered by 5V is connected to the HDMI interface can be obtained in advance. For set-top boxes that support power supply of 5V and below, the display device can power them for normal operation. For set-top boxes that only support power supply above 5V, the display device's power supply will not support their normal operation.

[0177] It should be noted that the higher the required power supply voltage, the greater the internal resistance of the set-top box, and therefore the higher the voltage drop at the connection node. In other words, the higher the detected node input voltage, the greater the power supply voltage required by the set-top box.

[0178] Therefore, the controller 250 can set the voltage divider value when a 5V-powered set-top box is connected to a voltage threshold. If the voltage is higher than the voltage threshold, it means that the external device requires more than 5V of power, and the display device cannot operate normally at this time.

[0179] After detecting the node input voltage, the controller 250 can detect the relationship between the node input voltage and the voltage threshold.

[0180] If the node input voltage is less than or equal to the voltage threshold, it indicates that the set-top box supports 5V power supply, meaning that the power supply to display device 200 can ensure the normal operation of the set-top box. Controller 250 can control display device 200 to supply power to external devices via the HDMI interface.

[0181] If the node input voltage exceeds the voltage threshold, it indicates that the set-top box only supports power supplies above 5V, and the display device 200 cannot provide the corresponding voltage. In this case, even if the display device 200 supplies power to the external device via the HDMI interface, it cannot operate normally. Therefore, the controller 250 can control the display device 200 to not supply power to the external device. Simultaneously, the controller 250 can control the display 260 to display the first prompt message. The first prompt message is used to prompt the user to connect a power source to the external device.

[0182] Figure 13 A schematic diagram showing the display 260 displaying a first prompt message is shown in some embodiments. For example... Figure 13 As shown, the first prompt message could be: "Prompt: Power cannot be supplied to the set-top box at present. Please connect the power supply to the set-top box!"

[0183] In some embodiments, considering that the set-top box itself may be equipped with an external power supply, the external power supply method may make the operation of the set-top box more stable than the display device 200 supplying power to the set-top box. Therefore, the controller 250 can also detect whether the set-top box connected to the display device 200 has the function of external power supply.

[0184] After the control display device 200 supplies power to the external device via the HDMI interface, the controller 250 can detect the functionality of the external device to determine whether the external device can be powered by an external power source.

[0185] The controller 250 can send device parameter acquisition commands to external devices via an HDMI interface. These commands instruct the external device to send its device parameters back to the display device 200. Upon receiving the command, the external device can detect its own device parameters and send them to the display device 200. These parameters may include functional parameters of the external device, such as power parameters, which indicate whether the external device has a power interface.

[0186] The controller 250 can receive and detect device parameters sent by external devices.

[0187] If the power parameters indicate that the external device has a power interface, it means that the external device can be connected to an external power source and powered by the external power source. The controller 250 can control the display device 200 to stop supplying power to the external device and control the display 260 to display a first prompt message. This first prompt message is used to prompt the user to connect a power source to the external device; for example, the first prompt message could be "An external device with a power interface has been detected. Please connect the set-top box to its power source."

[0188] If the power parameters indicate that the external device does not have a power interface, the controller 250 can control the display device 200 to continue supplying power to the external device through the HDMI interface.

[0189] In some embodiments, while the display device 200 is supplying power to the set-top box, the user may connect an external power source to the set-top box, causing the external power source to supply power to the set-top box. In this case, both the display device 200 and the external power source will supply power to the set-top box, resulting in energy waste, and multiple devices supplying power may affect the device safety of the set-top box.

[0190] Therefore, after the control display device 200 supplies power to the external device through the HDMI interface, the controller 250 can continue to detect the voltage signal status through the power supply pin to determine whether the external device sends a voltage signal to the HDMI interface, thereby determining whether the external power supply is supplying power to the external device.

[0191] If no voltage signal is detected from the external device, it means that no external power supply is supplying power to the external device. The controller 250 can control the display device 200 to continue supplying power to the external device through the HDMI interface.

[0192] If a voltage signal from an external device is detected, it indicates that an external power supply is currently providing power to the external device. The controller 250 can then control the display 260 to show the power supply type interface. This power supply type interface includes controls for the external device power supply and the display device 200 power supply.

[0193] Figure 14 Schematic diagrams of power supply type interfaces in some embodiments are shown. For example... Figure 14 As shown, the power supply type interface includes the prompt message "Please select the power supply method for the set-top box," an external device power supply control ("External Device Self-Powered" in the figure), and a display device 200 power supply control ("Display Device 200 Power Supply" in the figure). Users can choose either the external device power supply method or the display device 200 power supply method.

[0194] In response to the user's selection of the power supply control on the display device 200, the controller 250 can control the display 260 to show a second prompt message. This second prompt message indicates that the power supply to the external device should be disconnected. Figure 15A schematic diagram showing the display 260 displaying a second prompt message is shown in some embodiments. For example... Figure 15 As shown, the second prompt message could be: "Prompt: The set-top box is currently powered by the display device 200. Please disconnect the power supply to the set-top box!"

[0195] In response to the user's selection of the power supply control for the external device, the controller 250 can control the display device 200 to stop supplying power to the external device.

[0196] In some embodiments, after the control display device 200 supplies power to the external device through the HDMI interface, the controller 250 can control the external device to establish a communication connection with the display device 200 so that the external device can send media data signals to the display device 200.

[0197] The controller 250 can generate a hot-plug signal (HPD signal) and send it to an external device via the HDMI interface. The hot-plug signal enables the external device to read the Extended Display Identification Data (EDID) of the display device 200. Upon receiving the hot-plug signal, the external device can read the EDID of the display device 200.

[0198] The EDID contains parameters about the display 260 and its performance, including maximum image size, color settings, and resolution settings. External devices can generate corresponding media asset data based on the EDID and can perform a protocol handshake interaction with the display device 200. This protocol handshake interaction can be an HDCP handshake interaction (High-bandwidth Digital Content Protection technology). The HDCP handshake interaction is used to ensure that digitized image and sound data are not illegally copied when transmitted through the transmission interface.

[0199] In response to a protocol handshake interaction request sent by an external device, the controller 250 can control the display device 200 to perform a protocol handshake interaction with the external device; and, after the protocol handshake interaction is successful, establish a communication connection between the display device 200 and the external device.

[0200] In some embodiments, considering the device security of the display device 200, security verification can also be performed on the external device before establishing a communication connection with the external device.

[0201] After sending a hot-plug signal to the external device via the HDMI interface, the controller 250 can also send a verification command to the external device. The verification command is used to prompt the external device to return the physical address read from the Extended Display Identification Data (EDID). The EDID contains the physical address of the HDMI interface, so the external device can read the physical address of the currently connected HDMI interface based on the EDID.

[0202] After receiving the verification command, the external device will send the resolved physical address back to the display device 200. In this embodiment, the physical address of the HDMI interface is referred to as the first physical address, and the physical address sent back by the external device is referred to as the second physical address.

[0203] The controller 250 can receive a second physical address sent by an external device and obtain the first physical address of the HDMI interface. The controller 250 can detect whether the first physical address and the second physical address are the same.

[0204] If the first physical address and the second physical address are different, it indicates a problem with the external device. This could be because the external device cannot read the EDID, indicating a security issue, or it may be unable to parse the EDID or retrieve error information, indicating poor device performance or a malfunction. Therefore, the device cannot be used normally. The controller 250 can be configured to prevent the external device from establishing a communication connection with the display device 200.

[0205] The controller 250 can also control the display 260 to show a prompt message to remind the user to replace the external device connected via the HDMI interface. For example, the prompt message could be "There is a problem with the device connected to the current HDMI interface. Please replace it with another device."

[0206] If the first physical address and the second physical address are the same, it means that the external device can read and parse the EDID normally. At this time, the controller 250 can send a verification success message to the external device to notify the external device to continue establishing a communication connection. The verification success message is used to enable the external device to send a protocol handshake interaction request.

[0207] In response to a protocol handshake request sent by an external device, the controller 250 can control the display device 200 to perform a protocol handshake interaction with the external device. Furthermore, after a successful protocol handshake interaction, a communication connection is established between the display device 200 and the external device.

[0208] After the display device 200 establishes a communication connection with the external device, the external device can send media data signals to the display device 200. The controller 250 can parse the media data signals to obtain video and audio data. The controller 250 can control the display 260 to display video data and control the audio device to play audio data for the user to watch.

[0209] In some embodiments, when determining whether power needs to be supplied to an external device, the controller 250 may first obtain the connection status of the external device of the data transmission interface through a hot-swappable pin.

[0210] If no external device is connected to the data transmission interface, the control display device will not supply power to the data transmission interface.

[0211] If an external device is connected to the data transmission interface, the controller 250 can detect the voltage signal status via the power supply pin. When no voltage signal is detected from the external device, the controller controls the display device to supply power to the external device through the data transmission interface. When a voltage signal is detected from the external device, the controller controls the display device to stop supplying power to the data transmission interface.

[0212] In some embodiments, considering that powering an external device is contingent upon the data transmission interface being connected to the external device and the external device not sending a voltage signal, the controller 250 can simultaneously detect whether both conditions are met.

[0213] The controller 250 can detect the voltage signal status through the power supply pins, and obtain the connection status of external devices to the data transmission interface through the hot-swappable pins.

[0214] Based on the detection of a voltage signal indicating that the external device is not sending a voltage signal, and the external device connection status indicating that the data transmission interface is connected to an external device, the controller 250 can control the display device to supply power to the external device through the data transmission interface.

[0215] Based on the detected voltage signal status indicating that an external device has sent a voltage signal, and / or the external device connection status indicating that the data transmission interface is not connected to an external device, the controller 250 can control the display device not to supply power to the data transmission interface.

[0216] This application also provides an external device power supply method, applied to a display device, the method comprising:

[0217] Step 901: Detect the voltage signal status through the power supply pin; the voltage signal status is used to characterize whether the external device sends a voltage signal to the display device through the power supply pin;

[0218] Step 902: Based on the detected voltage signal state indicating that the external device is not sending a voltage signal, obtain the external device connection status of the data transmission interface through hot-plugging pins;

[0219] Step 903: If the external device connection status indicates that an external device is connected to the data transmission interface, then control the display device to supply power to the external device through the data transmission interface;

[0220] If the external device connection status indicates that the data transmission interface is not connected to an external device, then the control display device will not supply power to the data transmission interface.

[0221] The same or similar parts among the various embodiments in this specification can be referred to mutually, and will not be repeated here.

[0222] Those skilled in the art will clearly understand that the techniques in the embodiments of the present invention can be implemented using software plus necessary general-purpose hardware platforms. Based on this understanding, the technical solutions in the embodiments of the present invention, or the parts that contribute to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods of various embodiments or certain parts of the embodiments of the present invention.

[0223] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

[0224] For ease of explanation, the above description has been provided in conjunction with specific embodiments. However, the above exemplary discussion is not intended to be exhaustive or to limit the embodiments to the specific forms disclosed above. Various modifications and variations can be obtained based on the above teachings. The selection and description of the above embodiments are for the purpose of better explaining the principles and practical applications, thereby enabling those skilled in the art to better utilize the embodiments and various different variations of embodiments suitable for specific application considerations.

Claims

1. A display device, characterized in that, include: monitor; The data transmission interface is configured to connect to external devices; The data transmission interface includes hot-swappable pins and power supply pins. The hot-swappable pins are used to detect the connection status of external devices connected to the data transmission interface, and the power supply pins are used to detect the voltage signal sent by the external device. The controller is configured as follows: The voltage signal status is detected through the power supply pin; the voltage signal status is used to characterize whether the external device sends a voltage signal to the display device through the power supply pin. Based on the detected voltage signal state indicating that the external device is not sending a voltage signal, the connection status of the external device of the data transmission interface is obtained through the hot-plug pin; If the external device connection status indicates that an external device is connected to the data transmission interface, then the control display device supplies power to the external device through the data transmission interface; If the external device connection status indicates that the data transmission interface is not connected to an external device, then the control display device will not supply power to the data transmission interface.

2. The display device according to claim 1, characterized in that, Also includes: A voltage detection unit is configured to connect to the hot-swappable pin; The controller is configured to obtain the external device connection status of the data transmission interface through the hot-plug pin. Detect the node input voltage at the connection node between the hot-plug pin and the voltage detection unit; If the node input voltage is not the initial voltage, then the external device connection status is marked as an external device being connected to the data transmission interface; If the node input voltage is the initial voltage, then the external device connection status is marked as the data transmission interface is not connected to an external device.

3. The display device according to claim 2, characterized in that, If the external device connection status indicates that an external device is connected to the data transmission interface, the controller is further configured to: Detect the node input voltage and a preset voltage threshold; If the node input voltage is less than or equal to the voltage threshold, then the step of controlling the display device to supply power to the external device through the data transmission interface is executed; If the node input voltage is greater than the voltage threshold, the display is controlled to show a first prompt message; the first prompt message is used to prompt the external device to connect to a power source.

4. The display device according to claim 2, characterized in that, The voltage detection unit includes a first resistor and a second resistor connected in series, and the connection node between the first resistor and the second resistor is connected to the hot-swappable pin; the first resistor is connected to the power supply, and the second resistor is grounded.

5. The display device according to claim 4, characterized in that, Before the controller performs the function of detecting the voltage signal status via the power supply pin, it is also configured to: In response to the power-on command, the display device is controlled to enter the power-on state, and the power supply is controlled to input voltage to the voltage detection unit; Obtain the initial input voltage from the power supply to the first resistor; Based on the first resistor and the second resistor, calculate the voltage division value of the second resistor with respect to the initial input voltage, and mark the voltage division value as the initial voltage.

6. The display device according to claim 1, characterized in that, After the controller controls the display device to supply power to the external device through the data transmission interface, it is also configured to: The device parameter acquisition command is sent to the external device through the data transmission interface; the device parameter acquisition command is used to cause the external device to feed back device parameters to the display device. Receive and detect device parameters sent by the external device; the device parameters include power parameters; If the power parameters indicate that the external device has a power interface, the display device is controlled to stop supplying power to the external device, and the display is controlled to show a first prompt message; the first prompt message is used to prompt the external device to connect to a power source. If the power parameters indicate that the external device does not have a power interface, the control display device continues to supply power to the external device through the data transmission interface.

7. The display device according to claim 1, characterized in that, After the controller controls the display device to supply power to the external device through the data transmission interface, it is also configured to: The voltage signal status is detected through the power supply pin; Based on the absence of detected voltage signal from the external device, the control display device continues to supply power to the external device through the data transmission interface; Based on the detected voltage signal sent by the external device, the display is controlled to show a power supply type interface; the power supply type interface includes external device power supply controls and display device power supply controls; In response to the selection of the power supply control for the display device, the display is controlled to show a second prompt message; the second prompt message is used to prompt the external device to disconnect the power supply; in response to the selection of the power supply control for the external device, the display device is controlled to stop supplying power to the external device.

8. The display device according to claim 1, characterized in that, It also includes a connected power switch and a power module; the power module is configured to connect to the power pin; The controller controls the display device to supply power to external devices through the data transmission interface, specifically configured as follows: The power supply switch is kept closed, and the power supply module is controlled to input a preset voltage to the power supply pin so as to supply power to the external device through the data transmission interface; The controller is configured to prevent the display device from supplying power to the data transmission interface. The power supply switch is kept in the off state.

9. A display device, characterized in that, include: The data transmission interface is configured to connect to external devices; The data transmission interface includes hot-swappable pins and power supply pins. The hot-swappable pins are used to detect the connection status of external devices connected to the data transmission interface, and the power supply pins are used to detect the voltage signal sent by the external device. The controller is configured as follows: The voltage signal status is detected through the power supply pin, and the external device connection status of the data transmission interface is obtained through the hot-swappable pin; the voltage signal status is used to characterize whether the external device sends a voltage signal to the display device through the power supply pin. Based on the detection that the voltage signal status indicates that the external device is not sending a voltage signal, and the external device connection status indicating that the data transmission interface is connected to an external device, the control display device supplies power to the external device through the data transmission interface; Based on the detection of the voltage signal status indicating that the external device has sent a voltage signal, and / or the external device connection status indicating that the data transmission interface is not connected to an external device, the control display device does not supply power to the data transmission interface.

10. A method for supplying power to an external device, characterized in that, Applied to the display device according to any one of claims 1-8, the method comprises: The voltage signal status is detected through the power supply pin; the voltage signal status is used to characterize whether the external device sends a voltage signal to the display device through the power supply pin. Based on the detected voltage signal state indicating that the external device is not sending a voltage signal, the connection status of the external device of the data transmission interface is obtained through hot-plugging pins; If the external device connection status indicates that an external device is connected to the data transmission interface, then the control display device supplies power to the external device through the data transmission interface; If the external device connection status indicates that the data transmission interface is not connected to an external device, then the control display device will not supply power to the data transmission interface.

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