CN115150645A

CN115150645A - Display device and display method of screen projection function page

Info

Publication number: CN115150645A
Application number: CN202210746808.9A
Authority: CN
Inventors: 汪静娴; 韩征; 片兆峰
Original assignee: Hisense Visual Technology Co Ltd
Current assignee: Hisense Visual Technology Co Ltd
Priority date: 2022-06-28
Filing date: 2022-06-28
Publication date: 2022-10-04

Abstract

The application provides a display device and a display method of a screen projection function page. After receiving an instruction which is input by a user and used for indicating display of a screen projection function page, the display device responds to the instruction to acquire a device identification. And if the effective equipment identifier is not obtained, the screen projection function is not started, and the screen is in a black screen state. At this time, the display device displays prompt information for prompting that the user equipment identifier has a problem. And after the display equipment acquires the effective equipment identification, starting the screen projection function, and displaying a screen projection function page after the screen projection function is started. Therefore, when the display device is in a black screen state, the display device can prompt a user of the reason of the black screen through displaying the prompt information, and the user is prevented from blindly waiting for page loading.

Description

Display device and display method of screen projection function page

Technical Field

The application relates to the technical field of intelligent display equipment, in particular to display equipment and a display method of a screen projection function page.

Background

The display device is a terminal device capable of outputting a specific display picture, and may be a terminal device such as a smart television, a mobile terminal, a smart advertisement screen, and a projector. Taking an intelligent television as an example, the intelligent television is based on an Internet application technology, is provided with an open operating system and a chip, is provided with an open application platform, can realize a bidirectional man-machine interaction function, integrates multiple functions of video, entertainment, data and the like, and is a television product for meeting diversified and personalized requirements of users.

The wireless screen projection is also called wireless screen sharing, screen flying and screen sharing, and means that screen projection data provided by one terminal device is displayed on another terminal device in real time through a screen projection protocol, and the screen projection data can be media data, real-time operation pictures and the like. When the user uses the wireless screen projection function on the terminal equipment, the screen projection information related to the terminal equipment can be known and set by checking the screen projection function page of the terminal equipment. However, the terminal device may present a black screen state before displaying the screen projection function page, which causes the user to blindly wait for displaying the screen projection function page, and reduces the user experience.

Disclosure of Invention

The application provides a display device and a display method of a screen projection function page, when the display device is in a black screen state, prompt information is displayed, the black screen time is shortened, blind waiting of a user is avoided, the waiting time of the user is shortened, and experience of the user is improved.

In a first aspect, the present application provides a display device comprising:

a display configured to display a screen projection function page, the screen projection function page including screen projection information of the display device;

a controller configured to:

responding to an instruction which is input by a user and indicates to display the screen projection function page, and acquiring an equipment identifier, wherein the equipment identifier is used for verifying the permission of the display equipment for using the screen projection function;

if the device identification is not acquired or the display device is verified to have no use permission of the screen projection function according to the acquired device identification, the screen projection function is not started, the display is controlled to be in a black screen state, and prompt information is displayed;

and after verifying that the display equipment has the use permission of the screen projecting function according to the acquired equipment identification, starting the screen projecting function, and controlling the display to display the screen projecting function page after the screen projecting function is started.

In some embodiments of the present application, the controller further controls the display to display a first portal, the controller further configured to:

responding to an entry instruction input by a user based on the first entrance, and controlling the display to display a first inquiry page, wherein the first inquiry page is used for inquiring whether the user acquires the equipment identification again;

and responding to an instruction which is input by a user and indicates to retrieve the equipment identification, acquiring the equipment identification, and controlling the display to display a waiting page.

In some embodiments of the present application, the wait page includes a countdown icon, the countdown icon includes a duration value and/or a progress graphic, where the duration value is used to indicate a remaining duration of the device identifier obtained by the controller, an initial value of the duration value is a total duration of the device identifier expected to be obtained by the controller, the progress graphic is used to indicate a progress of the device identifier obtained by the controller, and a total duration corresponding to the total progress of the device identifier obtained by the controller is equal to the initial value of the duration value.

In some embodiments of the present application, the controller is configured to:

responding to the instruction input by the user and indicating to acquire the device identification again, and acquiring the device identification further comprises:

if the equipment identifier is not acquired after the equipment identifier is acquired again at least once, or the display equipment is verified to have no use permission of the screen projection function according to the acquired equipment identifier, controlling the display to display an update failure page, the update failure page comprises an appointed number and an operation prompt, the appointed number is uniquely corresponding to the equipment identifier, and the operation prompt is used for prompting a user to feed back the appointed number to a third-party terminal or a server so as to update the equipment identifier through the third-party terminal or the server.

In some embodiments of the present application, the update failure page further comprises a confirmation option, and the controller is further configured to:

and responding to an instruction input by the user based on the confirmation option, and sending the specified number to the third party terminal or the server in a preset communication mode.

starting a screen projection function, and controlling the display to display a screen projection function page after the screen projection function is started, wherein the screen projection function page comprises the following steps:

acquiring a starting state of an operating system according to an instruction transmitted by an entrance of the screen projecting function page through a screen projecting service, and sending a starting notice to a screen projecting application program to start the screen projecting application program, wherein the starting notice is generated according to the starting state of the operating system;

and sending a start-up notification to a screen projection process in a target communication mode corresponding to the start-up state of the operating system according to the start-up notification by the screen projection application program so as to enable the screen projection process to drive the display to display the screen projection function page.

In some embodiments of the present application, the startup state of the operating system is being started, the target communication mode is that the screen projection application transmits a notification of completion of startup to the screen projection process through the screen projection service, and the controller is configured to:

sending the started notification to the screen projection service in a foreground broadcast mode through the screen projection application program;

and sending the started notification to the screen projecting process through the screen projecting service so as to enable the screen projecting process to drive the display to display the screen projecting function page.

In some embodiments of the present application, the target communication mode is that the screen projection application directly sends a start-up notification to the screen projection process, and the controller is configured to:

establishing communication connection between the screen projection application program and the screen projection process;

and sending the started notification to the screen projecting process through the screen projecting application program so as to enable the screen projecting process to drive the display to display the screen projecting function page.

In a second aspect, the present application provides a method for displaying a screen projection function page, which is applied to a display device, where the display device displays the screen projection function page, and the screen projection function page includes screen projection information of the display device, and the method includes:

In some embodiments of the present application, the starting the screen projecting function and displaying the screen projecting function page after the screen projecting function is started includes:

After receiving an instruction which is input by a user and used for indicating display of a screen projection function page, the display equipment responds to the instruction and acquires an equipment identifier. And if the effective equipment identifier is not obtained, the screen projection function is not started, and the screen is in a black screen state. At this time, prompt information is displayed for prompting that the user equipment identifier has a problem. And after the display equipment acquires the effective equipment identification, starting the screen projection function, and displaying a screen projection function page after the screen projection function is started. Therefore, when the display equipment is in a black screen state, the display equipment can prompt the user of the reason for the black screen by displaying the prompt information, and the user is prevented from blindly waiting for page loading.

Drawings

In order to more clearly explain the technical solution of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a usage scenario of a display device in an embodiment of the present application;

FIG. 2 is a configuration diagram of a display device in an embodiment of the present application;

fig. 3 is a block diagram of a configuration of a control device in an embodiment of the present application;

FIG. 4 is an operating system configuration diagram of a display device in an embodiment of the present application;

FIG. 5 is a diagram illustrating a signal source menu according to an embodiment of the present application;

FIG. 6 is a schematic diagram of a screen projection function page in an embodiment of the present application;

fig. 7 is a schematic flowchart illustrating a process of displaying a screen projection function page in a black screen state in the embodiment of the present application;

fig. 8 is a schematic flowchart of a display method of a screen projection function page in an embodiment of the present application;

fig. 9 is a schematic flow chart illustrating how to display prompt information when a screen-on function page is in a black screen state in the process of displaying the screen-on function page in the embodiment of the present application;

FIG. 10 is a process of displaying a screen projection function page in an embodiment of the present application the flow diagram of displaying the prompt message when the middle screen is in a black screen state;

FIG. 11 is a flowchart illustrating an exemplary process of updating device identifiers according to an embodiment of the present application;

FIG. 12 is a schematic diagram of a first query page in an embodiment of the present application;

FIG. 13 shows an embodiment of the present application a schematic diagram of a waiting page;

FIG. 14 is a diagram illustrating a re-download page in an embodiment of the present application;

FIG. 15 is a diagram illustrating an update failure page in an embodiment of the present application;

fig. 16 is a schematic diagram of a bottom layer architecture for implementing a wireless screen projection function in an embodiment of the present application;

fig. 17 is a schematic flowchart illustrating a process of starting a screen projecting function and displaying a screen projecting function page in an embodiment of the present application;

FIG. 18 is a communication diagram illustrating the starting of a screen projection function and the display of a screen projection function page in an embodiment of the present application;

fig. 19 is a communication diagram illustrating a screen projection function being started and a screen projection function page being displayed in the embodiment of the present application;

fig. 20 is a communication diagram illustrating a screen projection function being started and a screen projection function page being displayed in an embodiment of the present application;

fig. 21 is a communication diagram illustrating a screen projection function being started and a screen projection function page being displayed in the embodiment of the present application;

fig. 22 is a communication diagram illustrating that a screen projecting function is started and a screen projecting function page is displayed in the embodiment of the present application.

Detailed Description

Reference will now be made in detail to embodiments, examples of which are illustrated in the accompanying drawings. The following description refers to the accompanying drawings in which the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following examples do not represent all embodiments consistent with the present application. But merely as exemplifications of systems and methods consistent with certain aspects of the application, as recited in the claims.

It should be noted that the brief descriptions of the terms in the present application are only for the convenience of understanding the embodiments described below, and are not intended to limit the embodiments of the present application. These terms should be understood in their ordinary and customary meaning unless otherwise indicated.

The terms "first," "second," "third," and the like in the description and claims of this application and in the foregoing drawings are used for distinguishing between similar or analogous objects or entities and are not necessarily intended to limit the order or sequence in which they are presented unless otherwise indicated. It is to be understood that the terms so used are interchangeable under appropriate circumstances.

The terms "comprises" and "comprising," as well as any variations thereof, are intended to cover a non-exclusive inclusion, such that a product or device that comprises a list of elements is not necessarily limited to all of the elements explicitly listed, but may include other elements not expressly listed or inherent to such product or device.

The display device provided by the embodiment of the present application may have various implementation forms, for example, the display device may be a smart television, a laser projection device, a display (monitor), an electronic whiteboard (electronic whiteboard), an electronic desktop (electronic table), and the like, and may also be a device with a display screen, such as a mobile phone, a tablet computer, and a smart watch. Fig. 1 and 2 are specific embodiments of a display device of the present application.

Fig. 1 is a schematic diagram of an operation scenario between a display device and a control device according to an embodiment. As shown in fig. 1, the user may operate the display device 200 through the mobile terminal 300 or the control device 100.

Fig. 3 is a block diagram of the configuration of the control apparatus 100. In some embodiments, the control device 100 may be a remote controller, and the communication between the remote controller and the display device includes at least one of an infrared protocol communication or a bluetooth protocol communication, and other short-range communication methods, and the display device 200 is controlled by a wireless or wired method. The user may input a user instruction through a key on a remote controller, voice input, control panel input, etc., to control the display apparatus 200.

In some embodiments, the mobile terminal 300 (e.g., a cell phone, a tablet, a computer, a notebook, etc.) may also be used to control the display device 200. For example, the display apparatus 200 is controlled using an application program running on the mobile terminal 300.

Fig. 3 shows a configuration block diagram of the display device 200 according to an exemplary embodiment.

The display apparatus 200 includes at least one of a tuner demodulator 210, a communicator 220, a detector 230, an external device interface 240, a controller 250, a display 260, an audio output interface 270, a memory, a power supply, and a user interface 280.

In some embodiments, the display device 200 may establish transmission and reception of control signals and data signals with the control device 100 or the screen projection device through the communicator 220. In some embodiments, the controller 250 and the modem 210 may be located in different separate devices, that is, the modem 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. In some embodiments, 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 apparatus 200. In some embodiments, the controller 250 includes at least one of a Central Processing Unit (CPU), a video processor, an audio processor, a Graphic Processing Unit (GPU), a RAM (Random Access Memory), a ROM (Read-Only Memory), a first to nth interface for input/output, a communication Bus (Bus), and the like. In some embodiments, the display 260 includes a display screen component for presenting a picture, and a driving component for driving image display, a component for receiving an image signal from the controller 250 output, performing display of video content, image content, and a menu manipulation interface, and a user manipulation UI interface. In some embodiments, the display 260 may be a liquid crystal display, an OLED display, and a projection display, and may also be a projection device and a projection screen. In some embodiments, the User may enter User commands on a Graphical User Interface (GUI) displayed on the display 260, and the User input Interface receives the User input commands through the GUI. Alternatively, the user may input the user command by inputting a specific sound or gesture, and the user input interface receives the user input command by recognizing the sound or gesture through the sensor. In some embodiments, a "user interface" is a media interface for interaction and information exchange between an application or operating system and a user that enables conversion between an internal form of information and a form that is acceptable to the user. A common presentation form of a user interface is a Graphical User Interface (GUI), which refers to a user interface related to computer operations that is displayed in a graphical manner. It may be an interface element such as an icon, a window, a control, etc. displayed in the display screen of the electronic device, where the control may include at least one of an icon, a button, a menu, a tab, a text box, a dialog box, a status bar, a navigation bar, a Widget, etc. visual interface elements.

Referring to fig. 4, in some embodiments, the operating system of the display device 200 is divided into four layers, which are, from top to bottom, an Application (Application) layer (abbreviated as "Application layer"), an Application Framework (Application Framework) layer (abbreviated as "Framework layer"), an Android runtime (Android runtime) and system library layer (abbreviated as "system runtime layer"), and a kernel layer. In some embodiments, at least one application program runs in the application program layer, and the application programs may be windows (Window) programs carried by an operating system, system setting programs, clock programs or the like; or may be an application developed by a third party developer. The application framework layer provides an Application Programming Interface (API) and a programming framework for the application program of the application layer. The application framework layer includes a number of predefined functions. The application framework layer acts as a processing center that decides to let the applications in the application layer act. The application program can access the resources in the system operation library layer and obtain the services of the system in the execution process through the API interface, and call corresponding drivers in the kernel layer to drive corresponding modules to use corresponding resources to execute corresponding services.

The display device 200 may establish a connection with a terminal device through a screen projection protocol, and display screen projection data provided by the terminal device, where the terminal device may be a mobile phone, a tablet computer, a notebook computer, or the like. Taking the scenario shown in fig. 1 as an example, the display device 200 and the mobile terminal 300 establish a connection through a screen-casting protocol, and the mobile terminal 300 transmits the picture data to the display device 200, so that the display device 200 displays the picture displayed by the mobile terminal 300 in real time. The screen projection function page of the display device 200 includes screen projection information of the display device 200, and the user can know the screen projection information of the display device 200 and set the screen projection function of the display device 200 by browsing the screen projection function page.

The entry of the screen projecting function page may be set in a function menu of the display apparatus 200, such as a Setting menu, a signal source (Input) menu, and the like. The user may input an instruction to display a function menu where an entry of the screen projection function page is located through the manipulation control device 100 to control the display device 200 to display the function menu, and then the user selects the entry of the screen projection function page through the manipulation control device 100 to control the display device 200 to display the screen projection function page. Taking the control device 100 as a remote controller, and setting an entry of a screen projecting function page in a signal source menu as an example, a process of displaying the screen projecting function page will be described. A user sends an instruction for displaying a signal source menu to the display device 200 by manipulating the remote controller, for example, a signal source key is arranged on the remote controller, the user sends the instruction to the display device 200 by pressing the signal source key, after receiving the instruction, the display device 200 determines that the instruction is an instruction for indicating to display the signal source menu by identifying a key value "signal source", and the display device 200 displays the signal source menu in response to the instruction. Taking the signal source menu shown in fig. 5 as an example, the signal source menu includes a plurality of signal source options, such as Television (TV), radio broadcast (AirPlay), high Definition Multimedia Interface (HDMI), and the like. Wherein, the wireless playing is the entry of the screen projection function page. The user moves the focus to the option of the wireless playing by manipulating the remote controller, and sends an instruction for displaying the screen projection function page to the display device 200 by pressing the "confirm" button on the remote controller, and the display device 200 displays the screen projection function page in response to the instruction. The screen projection function page includes screen projection information of the display device 200 and an option for setting a screen projection function of the display device 200, and is described by taking a screen projection function page shown in fig. 6 as an example, the screen projection function page includes a Wi-Fi network currently accessed by the display device 200, a terminal device to which the display device 200 is to be connected, a function option for setting a wireless screen projection and a smart home platform (AirPlay and HomeKit Settings), and screen projection options, such as a wireless screen projection option 601 and an airdrop screen 602. The screen projection function page also comprises some related indicators to instruct the user to perform related operations. The display device 200 currently accesses Wi-Fi1 and chooses to connect with device a in the living room. The user can reselect the Wi-Fi network to be accessed and the terminal equipment to be connected by setting the functions of the wireless screen projection and the intelligent home platform, and select the screen projection mode between the display equipment 200 and the terminal equipment by selecting the screen projection option.

The display device 200 may display the screen projection function page based on the fact that the display device 200 has the use permission of the screen projection function, that is, the display device 200 can display the screen projection function page only if the display device 200 has the use permission of the screen projection function, and if the display device 200 does not have the use permission of the screen projection function, the screen projection function page cannot be displayed, and at this time, the display device 200 is in a black screen state. Taking the signal source menu shown in fig. 5 (same as (1) in fig. 7) as an example, if the user inputs an instruction based on the wireless screen projection option by manipulating the remote controller, the display device 200 is in a black screen state if it does not have the usage right of the screen projection function, as shown in (2) in fig. 7. In the embodiment of the present application, the black screen state means that no page is displayed. When the display device 200 does not have the usage right of the screen projection function and is in the black screen state, the user cannot know the reason of the black screen state and cannot determine the method for solving the black screen state, and only can select to blindly wait for the display device 200 to display the screen projection function page, but actually, the display device 200 cannot display the screen projection function page subsequently, so that the user waits inefficiently. Even if the user selects to exit the screen projection function page and re-enters the screen projection function page by re-selecting the wireless screen projection option, the display device 200 still assumes a black screen state because the display device 200 still does not have the usage right of the screen projection function.

In order to solve the problem that the display device 200 is in a black screen state due to no permission of the screen projecting function in the process of displaying the screen projecting function page, the display device 200 may display the screen projecting function page according to the flow shown in fig. 8, and the specific steps are as follows:

s801, the display device 200 responds to an instruction input by the user to display a screen projection function page, and acquires a device identifier.

In the embodiment of the present application, the device identifier uniquely corresponds to the display device 200, and may be referred to as a key of the display device 200, where the device identifier is used to verify whether the display device 200 has a usage right of the screen projection function. The device identifier may be an Identity (ID) of the display device 200, and a manufacturer of the display device 200 generally burns and records a manner (such as a storage address) for obtaining the device identifier in the display device 200, and when the display device 200 is running, if the device identifier needs to be used, the device identifier is obtained through the internet according to the prefabricated obtaining manner.

The screen projection function belongs to an Enhanced Experience (Enhanced Experience) function of the display device 200, and before using the screen projection function, the display device 200 needs to verify whether the display device 200 has a use right of the screen projection function, where the use right may include whether a system version of the display device 200 supports the screen projection function, whether a device identity of the display device 200 is trusted to support the screen projection function, and the like. The screen projection function may be used only when the display apparatus 200 passes the authentication, to ensure validity, security, and the like of the use of the screen projection function.

The display device 200, after receiving an instruction input by a user to instruct display of a screen-projection function page, acquires a device identification in response to the instruction to verify whether or not a usage right of the screen-projection function is present.

S802, if the display device 200 does not acquire the device identifier or verifies that the use permission of the screen projection function is not available according to the acquired device identifier, the screen projection function is not started, the screen projection function is in a black screen state, and prompt information is displayed.

When the display device 200 does not acquire the device identifier, the use permission without the screen projection function may be directly determined.

After the display device 200 acquires the device identifier, it is necessary to further verify whether the display device 200 has the usage right of the screen projection function according to the acquired device identifier.

For example: the display device 200 calculates a verification value corresponding to the device identifier according to a preset verification algorithm. If the verification value is consistent with the verification value of the preset use permission with the screen projection function, the verification is passed, that is, the display device 200 has the use permission with the screen projection function. If the verification value is different from a verification value preset with the use authority of the screen projection function, the verification is not passed, that is, the display apparatus 200 does not have the use authority of the screen projection function.

Another example is: the display device 200 determines the usage right corresponding to the device identifier according to a preset mapping relationship. If the usage right corresponding to the device identifier is allowed, the verification is passed, that is, the display device 200 has the usage right of the screen projection function. If the usage right corresponding to the device identifier is prohibited, the verification is not passed, that is, the display device 200 does not have the usage right of the screen projection function.

If the display device 200 does not have the usage right of the screen projection function, the screen projection function is not started and is in a black screen state. The display device 200 may determine, based on the above process, that the reason for the use permission without the screen projection function is that the device identifier is in problem (not acquired, or not verified), and the display device 200 displays the prompt information to prompt the user that the reason for the black screen state is that the device identifier is in problem.

The reminder may include information that prompts the device identification for a problem, such as text and an icon, and may include a shortcut option for viewing information related to the device identification.

Taking the signal source menu shown in fig. 5 (same as (1) in fig. 9) as an example, the user inputs an instruction based on the wireless screen projection option by manipulating the remote controller, and the display device 200 assumes a black screen state if it does not have the usage right of the screen projection function, and displays a prompt message, as shown in (2) in fig. 9. The prompt message includes "please check the device identification" and an icon 901. The user can quickly know that the reason for the black screen state is that the equipment identifier has a problem by reading the prompt message, and the problem of the black screen can be solved by checking the equipment identifier, so that the user is prevented from blindly waiting for page loading.

Taking the Home page (Home) of the display device 200 to view the information related to the device identifier, taking the signal source menu shown in fig. 5 (same as (1) in fig. 10) as an example, the difference from (2) in fig. 9 is that if the display device 200 does not have the usage right of the screen-projection function, the displayed prompt information further includes a shortcut option 1001, and the shortcut option 1001 is an entry for displaying the signal source menu, as shown in (2) in fig. 10. Therefore, the user can not only quickly know that the reason for the black screen state is that the equipment identifier is in a problem, but also can solve the black screen problem in a mode of checking the equipment identifier, and can directly return to the signal source menu by selecting the shortcut option 1001 so as to enter the homepage from the signal source menu to check the related information of the equipment identifier, thereby improving the operation convenience of the user.

The display apparatus 200 displays the hint information, which may be implemented by a native application in the operating system, such as by a Notification (Notification) application. The display device 200 verifies the use permission of the screen projection function by monitoring the start notification of the screen projection function, and directly calls the notification application to display the notification when the verification fails, wherein the content of the notification is the prompt message. Thus, a third-party application dedicated to displaying the guidance information does not need to be additionally configured in the display apparatus 200.

After browsing the prompt message, the user may check the device identifier based on the prompt message and obtain a new device identifier to enable the display device 200 to have the right to use the screen projection function, thereby solving the problem of a blank screen.

To facilitate user operation and to prevent the situation where the user cannot resolve the black screen when he does not know how to obtain a new device identification, the display device 200 is configured to actively provide a resolution path for the user when there is a problem with the device identification. The display device 200 also displays a first entry for entering a relevant page provided by the display device 200 that resolves the device identification as invalid.

In some embodiments, the first inlet may be a separate inlet. In some embodiments, the first entry may be an information window in which the reminder information is located, such as information window 902 of (2) in fig. 9, and also such as information window 1002 of (2) in fig. 10.

The display device 200 may solve the problem of the device identifier according to the flow shown in fig. 11, and the specific steps are as follows:

s1101, the display device 200 displays a first inquiry page in response to an entry instruction input by the user based on the first portal.

Taking the control device 100 as a remote controller, the page in (2) in fig. 9 is taken as an example. The user moves the focus onto the information window 902 by manipulating the remote controller and inputs an entry instruction to the display apparatus 200 by pressing an "ok" button on the remote controller. The display device 200 displays a first inquiry page in response to the entry instruction. The first inquiry page is used to inquire of the user whether the device identification needs to be acquired again, that is, whether the case where the device identification is problematic needs to be solved by the display device 200. Reference may be made to the first query page shown in fig. 12, which includes prompt text to prompt the user for an action to be performed, such as "update the device identification", i.e., prompt the user for an upcoming update of the device identification. The first query page also includes operation options such as an update option 1201 and a cancel option 1202. Among them, the update option 1201 is used for the user to input an instruction instructing the display device 200 to perform an operation shown in the prompt text, such as updating the device identification. The cancel option 1202 is for user input to instruct the display device 200 to terminate the associated task of resolving the device identification problem.

S1102, the display device 200, in response to an instruction input by the user to re-acquire the device identifier, acquires the device identifier, and displays a waiting page.

Taking the first query page shown in fig. 12 as an example, the user moves the focus to the update option 1201 by manipulating the remote controller, and inputs an instruction to the display apparatus 200 instructing to retrieve the apparatus identification by pressing the "ok" key of the remote controller. The display device 200 retrieves the device identification in response to the instruction. For example: the display device 200 calls a Reset (Reset) interface to retrieve the device identification. The process of the display device 200 retrieving the device identifier is similar to step S801, and is not described here again.

The display device 200 displays the waiting page when the device identification is retrieved. The wait page includes a wait prompt message to prompt the user that the display device 200 is retrieving the device identification. The waiting alert information may include text information, icons, and the like. Taking the waiting page shown in fig. 13 as an example, the waiting page includes the text information "update device id, please wait", and countdown icon 1301. The countdown icon 1301 may visually display the remaining time required for the display device 200 to obtain the device identifier and/or the progress of the display device 200 in obtaining the device identifier. Countdown icon 1301 includes a duration value, a progress icon, or both. The duration value is used for indicating the remaining duration of the device identifier obtained by the display device 200, the duration value adopts a countdown display mode, the initial duration value of the duration value is the total duration of the device identifier obtained by the display device 200, and when the duration value is 0, the task that the display device 200 obtains the device identifier at this time is executed completely. The progress diagram is used for indicating the progress of the display device 200 in acquiring the device identifier, and the progress of the display device 200 in acquiring the device identifier is matched with the total duration of acquiring the device identifier, namely, the longer the total duration of acquiring the device identifier is, the slower the progress of acquiring the device identifier is; on the contrary, the shorter the total duration for acquiring the device identifier is, the faster the progress for acquiring the device identifier is. The progress diagram comprises two parts, one part corresponds to a complete progress diagram and represents that the display device 200 acquires the total progress of the device identifier, the total duration of the total progress is equal to the total duration of the device identifier acquired by the display device 200, the other part represents that the display device 200 acquires the progress of the device identifier, and the difference part of the two parts is the progress of the display device 200 that the device identifier is not acquired yet.

The total duration of the display device 200 for acquiring the device identifier may be a preset fixed value, or may be a dynamic value calculated by the display device 200 in real time based on the current network environment and the like. After the display device 200 determines that the total duration of the device identifier is obtained, timing may be started through a timer (Time) function, and the duration value displayed in the countdown icon 1301 is a difference between the total duration and the duration counted by the timer. The progress graphic in the countdown icon 1301 may display the completed progress according to N (N > 0) duration units of the timer, for example, the progress graphic displays the completed progress according to 1 duration unit of the timer, and at this time, the progress graphic displays the completed progress corresponding to 1 duration unit by increasing 1 duration unit every time the timer increases. For another example, the progress diagram displays the completed progress according to 3 duration units of the timer, and at this time, every time the timer is increased by 3 duration units, the progress diagram increases and displays the completed progress corresponding to the 3 duration units.

Taking the total duration of the acquired device identifier as 12s, the timing unit of the timer as 1s, and the current duration as 3s, taking the progress diagram as a ring as an example. The display device 200 displays a countdown icon 1301, wherein the duration value is 9s, that is, the remaining duration of the device identifier acquired by the display device 200 is 9s, a white portion in the progress diagram represents the completed progress, the area of the white portion is one fourth of the area of the circular ring, and the area represents one fourth of the total progress of the device identifier acquired by the display device 200.

After the display device 200 reacquires the device identifier, it is necessary to verify whether the display device 200 has the usage right of the screen projection function, where the process of verifying whether the display device 200 has the usage right of the screen projection function again is similar to step S802, and is not described here again.

In some embodiments, the display device 200 may be configured to provide the service of retrieving the device identifier only once for the user, that is, after retrieving the device identifier, if the display device 200 is not authenticated yet, i.e., still has no usage right of the screen projection function, the service of retrieving the device identifier is no longer provided for the user. Therefore, the frequency of reacquiring the equipment identifier is reduced, and the time consumed by the process of repeatedly acquiring the equipment identifier can be effectively avoided, so that the influence on the user experience is reduced.

In some embodiments, the display device 200 may be configured to provide the user with the service of reacquiring the device identifier multiple times, that is, after the display device 200 reacquires the device identifier, if the device identifier is not verified yet, the display device 200 continues to provide the user with the service of reacquiring the device identifier, and after receiving the instruction input by the user and instructing to reacquire the device identifier, the display device 200 reacquires the device identifier until the upper limit of the number of times of reacquiring the device identifier is reached, and the display device 200 does not provide the user with the service of reacquiring the device identifier any more. Therefore, the success rate of obtaining the effective equipment identification can be improved by repeatedly obtaining the equipment identification, so that the experience of a user is improved. Illustratively, if the display device 200 has not yet been verified, a re-download page is displayed, which may refer to the re-download page shown in fig. 14 and contains prompt text to prompt the user about to perform an operation, such as "update device identification", i.e., prompt the user about to update device identification. The re-download page also includes operation options such as try again (Retry) option 1401 and cancel option 1402. Wherein the retry option 1401 is used for user input instructing the display device 200 to retrieve the device identification again. The cancel option 1402 is for user input to instruct the display device 200 to terminate the associated task of resolving the device identification problem. Taking the control apparatus 100 as an example of a remote controller, the user moves the focus to the retry option 1401 by manipulating the remote controller, and inputs an instruction to acquire the apparatus identification again to the display apparatus 200 by pressing the "ok" key of the remote controller. The process of the display device 200 acquiring the device identifier again in response to the instruction is similar to step S1102, and is not described here again. Assuming that the upper limit of the number of times that the display device 200 reacquires the device identifier is 5 times, when the number of times that the display device 200 statistically acquires the device identifier is equal to 5 times and the authentication is not passed after the device identifier is acquired for the 5 th time, the display device 200 no longer provides the service of reacquiring the device identifier for the user.

If the display device 200 does not acquire the device identifier after acquiring the device identifier again at least once, or verifies that the use permission without the screen projection function is not available according to the acquired device identifier, displaying an update failure page.

The update failure page includes an update failure prompt to prompt that the user equipment identifier fails to be updated, and the service for acquiring the equipment identifier is not provided any more.

In some embodiments, in order to facilitate the user to solve the problem of the black screen caused by the problem of the device identifier when the display device 200 no longer provides the service of acquiring the device identifier, the update failure prompt includes a designated number and an operation prompt. The specified number uniquely corresponds to the equipment identifier, and the operation prompt is used for prompting a user to feed back the specified number to the third-party terminal or the server so as to update the equipment identifier through the third-party terminal or the server. The designated numbers may be all the same characters, such as all numbers, or all letters, and the designated numbers may also be a combination of multiple characters, such as a combination of numbers and letters, a combination of numbers and symbols, and the like. The third party terminal or the server may be a manufacturer, operation, maintenance, or the like of the display device 200, and has an authority to acquire the correspondence between the designated number and the device identifier, and an authority to view the device identifier update record, so that the update record may be represented based on the device of the display device 200, and a reason for failure in updating the device identifier may be analyzed.

In some embodiments, the user may contact the third party terminal or server by himself and inform the third party terminal or server of the specified number in the update failure prompt. In some embodiments, to avoid additional operations by the user, the display device 200 is configured to also display a confirmation (OK) option on the update failure page. The confirmation option is an entry into which the user inputs an instruction instructing the display device 200 to contact a third party terminal or server to update the device identification. The display apparatus 200 transmits the designation number to the third party terminal or the server in a preset communication manner in response to the instruction. The pre-stored communication mode can be set by a manufacturer or a user, and can include mails, cloud accounts, short messages and the like.

Reference may be made to the update failure page shown in fig. 15, which includes an update failure prompt "update failure. Please notify the after-market or manufacturer of the designation number No.1 xxx x 0. ", and a confirm option 1501. The control apparatus 100 is a remote controller, and the prestored communication method is a mail. The user moves the focus onto the confirmation option 1501 by manipulating the remote controller, and inputs an instruction to the display apparatus 200 by pressing the "confirm" key of the remote controller. The display apparatus 200 transmits the designated number to a pre-stored mailbox of a third party terminal or server in the form of a mail in response to the instruction.

The display device 200 closes the update failure page in response to an instruction input by the user based on the confirmation option, and displays a menu including an entry to the screen-on function page, such as displaying the signal source menu shown in fig. 5, or displays other user interfaces, such as the main page of the display device 200, or the like.

And S803, after verifying the use permission with the screen projection function according to the acquired device identifier, the display device 200 starts the screen projection function, and displays a screen projection function page after the screen projection function is started.

If the display device 200 passes the verification according to the acquired device identifier when responding to the instruction for displaying the screen projecting function page input by the user, that is, the display device 200 has the use permission of the screen projecting function, or after the display device 200 acquires the device identifier again for one or more times, the display device 200 starts the screen projecting function according to the last acquired device identifier passing the verification, that is, the display device 200 has the use permission of the screen projecting function, and displays the screen projecting function page after the screen projecting function is started.

In connection with the operating system shown in fig. 4, the implementation of the screen projection function depends on the cooperation between the entry of the screen projection function page located at the application layer, the screen projection service and the screen projection application package located at the system framework layer, and the screen projection process located at the system runtime layer. Taking the screen projection function as the wireless screen projection shown in fig. 5 as an example for explanation, as shown in fig. 16, an entry of the screen projection function page is a wireless screen projection in the signal source menu of fig. 5, and a user can interact with the display device 200 through the entry to use the screen projection function. The screen projection application program package is a wireless screen projection application program (AirPlay Apk) and is used for butting the attributes of the whole machine and acquiring the parameters of the whole machine, such as volume, related to the wireless screen projection function. The screen projection process is a wireless screen projection process (AirPlay Daemon), is a resident local (Native) Daemon, and can communicate with the kernel layer to drive hardware equipment, for example, a display to display a screen projection function page. The screen-casting Service is a wireless screen-casting Service (AirPlay Lunch Service), and the wireless screen-casting Service can provide an interface for a screen-casting application program, inquire related authority information of the wireless screen-casting application program, manage the life cycle of the wireless screen-casting application program, communicate with a wireless screen-casting process and the like.

The process of inputting the instruction to the display device 200 by the user based on the entry of the screen projection function page is similar to the process of inputting the instruction by the user based on the entry of the screen projection function page, and the details are not repeated here. After receiving the instruction, the portal transmits the instruction to the screen projection service in a message form, the screen projection service queries the authority information related to the screen projection application program, namely, queries whether the screen projection application program has the use authority of the screen projection function, and the process of querying the authority information by the screen projection service is similar to the steps S801 to S802, and is not repeated here. And when the screen projection service inquires the use right with the screen projection function, controlling the screen projection application program to start, namely starting the life cycle of the screen projection application program. After the screen projection application program is started, a notification of the completion of the starting is sent to the screen projection service, so that the screen projection service controls and loads a package file of the screen projection application program to obtain page data of a screen projection function page, the screen projection service communicates with a screen projection process to send a starting message, the page data of the screen projection function page and the like to the screen projection process, and the screen projection process drives a display to display the screen projection function page according to the page data of the screen projection function page.

In the process, from the time when the screen projection service inquires that the screen projection function has the use permission, to the time when the display displays the screen projection function page, the display is in a black screen state at the stage. Therefore, if the communication time length of the stage is long, the black screen time length in the black screen state is also long, and if the communication time length of the stage is short, the black screen time length in the black screen state is also short. And being the black screen state for a long time, can reducing user's experience and feel, in order to solve the long problem of long length of black screen in this stage, need shorten the communication duration in this stage.

And the screen projection service can execute the subsequent steps only after receiving the start completion sent by the screen projection application program, namely, the screen projection function page can be displayed on the display. In the display apparatus 200, the screen projection application is configured to send a notification of completion of startup to the screen projection service by default in a background broadcast manner. Except the application programs with specified requirements in the operating system, other application programs all adopt a background broadcast mode to send notifications to corresponding services, all background broadcasts are concentrated in a Stack (Stack), and a system framework layer of the operating system can transmit each background broadcast to the corresponding service in sequence according to the receiving sequence of each background broadcast in the Stack. For example: the notification sent by the screen-casting application program after being started is the 7 th background broadcast in the stack, and the system framework layer needs to process the notification sent by the screen-casting application program after finishing processing the 1 st to 6 th background broadcasts in the stack, that is, the notification after being started is transmitted to the screen-casting service.

After the display device 200 is started, the display device 200 starts the operating system first, and in the starting process of the operating system, each specified application program automatically started after the display device is started starts to be loaded, and all the specified application programs are completely loaded, that is, the operating system is started. After the designated application programs are started, the notification of the completion of the starting is sent to the system framework layer in a background broadcast mode. If the application programs except the specified application programs are started in response to the starting instruction of the user, the background broadcast sent by the application programs is arranged behind the background broadcast sent by the specified application programs, namely, the system framework layer processes the background broadcast sent by other application programs only after the background broadcast sent by the specified application programs is processed. If the display device 200 receives an instruction indicating to display a screen projection function page in the starting process of the operating system, and after the screen projection application program is started, the background broadcast sent to the screen projection service is arranged at least after the background broadcast sent by the specified application program, the communication time length for the screen projection service to receive the background broadcast sent by the screen projection application program is longer, and then the black screen time length of the display device 200 in the black screen state is longer.

In order to solve the problem that the screen blacking duration is long before the screen projection function page is displayed in the starting process of the operating system of the display device 200, the display device 200 may start the screen projection function according to the flow shown in fig. 17 and display the screen projection function page, and the specific steps are as follows:

s1701, the display device 200 obtains a start state of the operating system according to the instruction transmitted from the entry of the screen projecting function page through the screen projecting service, and sends a start notification to the screen projecting application to start the screen projecting application. Wherein the boot notification is generated according to a boot state of the operating system.

The screen-casting service can detect whether the operation system is completely started or not by detecting the loading state of each appointed application program automatically started after starting, whether background broadcast sent by the appointed application program automatically started after starting exists in a stack or not and the like. If the loaded and/or unloaded appointed application program which is automatically started after the startup exists, the background broadcast sent by the appointed application program which is automatically started after the startup exists in the stack, and the like, the starting state of the operating system is the starting state, otherwise, the starting state of the operating system is the starting completion. And the screen projection service sends the acquired starting state of the operating system to the screen projection application program in a starting notification mode so as to start the screen projection application program.

S1702, the display device 200 sends a start-up completion notification to the screen projecting process in the target communication mode corresponding to the start-up state of the operating system according to the start-up notification by the screen projecting application, so that the screen projecting process drives the display to display the screen projecting function page.

And the screen projection application program starts loading according to the received start-up notification, and generates a start-up notification after the loading is finished. In order to shorten the communication time for sending the started notification to the screen projecting process by the screen projecting application program, the screen projecting application program needs to send the started notification to the screen projecting in a target communication mode corresponding to the starting state of the operating system, so that the screen projecting process drives the display to display the screen projecting function page.

In one implementation, the starting state of the operating system is starting, and the target communication mode is that the screen projection application program transmits a notification of completion of starting to the screen projection process through the screen projection service, wherein the screen projection application program sends the notification of completion of starting to the screen projection service in a foreground broadcast mode.

As can be seen from the above, if the operating system is being started, the background broadcast sent by the screen-casting application program needs to be delivered to the screen-casting service after the background broadcast sent by the designated application program is processed, and thus, a long time is required to wait. When the operating system is started, the screen projection application program can send a notification of completion of the starting to the screen projection service in a foreground broadcast mode. For example, the screen-casting application adds a Flag (Flag) to the transmitted broadcast, such as a Receiver foregoround, to indicate that the broadcast is a Foreground broadcast. Because foreground broadcasts and background broadcasts belong to different stacks, the number of foreground broadcasts is usually small. Meanwhile, the response time of the foreground broadcast is shorter than that of the background broadcast, generally, the response time of the foreground broadcast is 10s, and the response time of the background broadcast is 60s, that is, the broadcast needs to be processed within the response time corresponding to each broadcast, so that the time for processing the foreground broadcast is relatively short. Therefore, the notification of the completion of the starting sent by the screen projecting application program can be processed quickly, and can be transmitted to the screen projecting service after less foreground broadcasting processing is finished, so that the screen projecting service is transmitted to the screen projecting process quickly, the communication time between the screen projecting application program and the screen projecting process is shortened, the black screen time is shortened, and the use experience of a user is effectively improved. The screen-casting service may perform Socket (Socket) communication with the screen-casting process through a Transmission Control Protocol (TCP).

The wireless screen projection function is explained as an example, as shown in fig. 18. The method comprises the steps that an instruction is transmitted to a wireless screen projection service through an entrance of a wireless screen projection function page, the wireless screen projection service acquires that the starting state of an operating system is starting, the wireless screen projection service generates a starting notice according to the starting state of the operating system, the starting notice comprises indication information indicating that a screen projection application program adopts Foreground broadcasting, such as Foreground, and the starting notice is sent to the wireless screen projection application program. And after the wireless screen projection application program is started, sending a notification of the completion of the starting to the wireless screen projection service in a foreground broadcast mode. And the wireless screen projection service transmits the started notification to the wireless screen projection process so as to enable the wireless screen projection process to drive the display to display the wireless screen projection function page.

In one implementation, the start state of the operating system is in a starting state, and the target communication mode is that the screen projection application program directly sends a notification of completion of the starting to the screen projection process.

In order to avoid that the screen projecting application program sends the notification of the completion of the starting to the screen projecting service in a background broadcasting mode, the screen projecting application program directly establishes communication with the screen projecting process, so that the screen projecting application program can directly send the notification of the completion of the starting to the screen projecting process without passing through the screen projecting application program, the communication time between the screen projecting application program and the screen projecting process can be effectively shortened, the black screen time is shortened, and the use experience of a user is improved. For example: a monitoring interface can be configured in the screen projection application program, and Socket communication is directly carried out with the screen projection process through TCP after the screen projection application program is monitored to be started.

The wireless screen projection function will be described as an example, as shown in fig. 19. And transmitting an instruction to the wireless screen projection service through an entrance of the wireless screen projection function page, acquiring that the starting state of the operating system is starting by the wireless screen projection service, and transmitting a starting notice containing the starting state to the wireless screen projection application program. After the wireless screen projection application program is started, communication is established with the wireless screen projection process, and the started notification is directly transmitted to the wireless screen projection process, so that the wireless screen projection process drives the display to display a wireless screen projection function page.

In one implementation mode, the starting state of the operating system is started, and the target communication mode is that the screen-casting application program transmits a notification of the completion of the starting to the screen-casting process through the screen-casting service, wherein the screen-casting application program sends the notification of the completion of the starting to the screen-casting service in a background broadcast mode.

If the operating system is started, the background broadcasts sent by each appointed application program which is started automatically are processed, at the moment, the number of the background broadcasts in the stack corresponding to the background broadcasts is reduced, namely the number of the background broadcasts processed before the background broadcasts sent by the screen projection application program is reduced, if the screen projection application program sends a notification of the completion of the starting to the screen projection service in a background broadcast mode, the time length of the screen projection service for waiting for the notification of the completion of the starting is shortened, therefore, the communication time length between the screen projection application program and the screen projection process is also relatively reduced, correspondingly, the black screen time length is also shortened, stronger negative feelings of a user cannot be caused, the broadcasting mode of the screen projection application program does not need to be changed, and the notification of the completion of the starting is still sent in a default background broadcast mode. Moreover, the priority of the foreground broadcast is higher than that of the background broadcast, namely, the operating system can process the foreground broadcast preferentially and then process the background broadcast, so that the newly generated foreground broadcast can influence the processing process of the background broadcast, and the normal operation of the application program corresponding to the background broadcast is influenced. Therefore, in order to ensure the normal operation of the display device 200, when the screen blacking time is relatively short, the communication between the screen projection application program and the screen projection service in a foreground broadcast mode is avoided as much as possible.

The wireless screen projection function is described as an example, as shown in fig. 20. The method comprises the steps that an instruction is transmitted to a wireless screen projection service through an entrance of a wireless screen projection function page, the wireless screen projection service acquires that the starting state of an operating system is the starting completion, the wireless screen projection service generates a starting notice according to the starting state of the operating system after the starting completion, the starting notice comprises indicating information, such as Background broadcast, indicating that a screen projection application program adopts Background broadcast, and the starting notice is sent to the wireless screen projection application program. And after the wireless screen projection application program is started, sending a notification of the completion of the starting to the wireless screen projection service in a background broadcasting mode. And the wireless screen projection service transmits the started notification to the wireless screen projection process so as to enable the wireless screen projection process to drive the display to display the wireless screen projection function page.

In some embodiments, after the operating system is started, there are still more background broadcasts, and at this time, if the screen-casting application program still sends a start-up notification to the screen-casting service in a background broadcast manner, there still exists a long waiting time, which results in a long communication time between the screen-casting application program and the screen-casting service, and a long blank screen time. In order to solve the problem, the screen projection service acquires the number of background broadcasts in the stack according to an instruction transmitted by an entry of a screen projection function page after acquiring that the starting state of the operating system is the starting completion. If the number of the background broadcasts in the stack is larger than or equal to the number threshold, it indicates that the number of the background broadcasts is still large, and the screen-casting application program needs to send a notification of completion of starting to the screen-casting service in a foreground broadcast mode. If the number of the background broadcasts in the stack is smaller than the number threshold, the number of the background broadcasts is small, and the screen projection application program can send a notice of completion of starting to the screen projection service in a background broadcast mode.

The wireless screen projection function is described as an example, as shown in fig. 21. And transmitting the instruction to the wireless screen projection service through an inlet of the wireless screen projection function page, acquiring that the starting state of the operating system is the starting completion by the wireless screen projection service, and acquiring the number of the background broadcasts in the stack by the wireless screen projection service according to the starting state of the operating system after the starting completion. If the number of the background broadcasts is larger than or equal to the number threshold, a starting notice is generated, the starting notice comprises indication information indicating that the screen projection application program adopts Foreground broadcasts, such as Foreground, and the starting notice is sent to the wireless screen projection application program. And after the wireless screen projection application program is started, sending a notification of the completion of the starting to the wireless screen projection service in a foreground broadcast mode. And if the number of the Background broadcasts is smaller than the number threshold, generating a starting notice, wherein the starting notice comprises indication information indicating that the screen-casting application program adopts the Background broadcasts, such as Background, and sending the starting notice to the wireless screen-casting application program. And after the wireless screen projection application program is started, sending a notification of the completion of the starting to the wireless screen projection service in a background broadcasting mode. And the wireless screen projection service transmits the started notification to the wireless screen projection process so as to enable the wireless screen projection process to drive the display to display the wireless screen projection function page.

In some embodiments, the startup state of the operating system is started up, and the number of the background broadcasts in the stack is greater than or equal to the number threshold, and the screen-casting application program may also directly establish communication with the screen-casting process to directly send a notification of the completion of the startup to the screen-casting process.

In one implementation, the starting state of the operating system is started, and the target communication mode is that the screen projection application program directly sends a notification of the completion of the starting to the screen projection process.

The wireless screen projection function is explained as an example, as shown in fig. 22. And the wireless screen projection service acquires that the starting state of the operating system is the completion of starting, and sends a starting notice containing the starting to the wireless screen projection application program. After the wireless screen projection application program is started, the starting state of the operating system may be referred to as the starting state in the foregoing, and the process of direct communication between the screen projection application program and the screen projection process is not described herein again. Therefore, the communication time between the screen projecting application program and the screen projecting process can be further shortened through the direct communication between the screen projecting application program and the screen projecting process, and the black screen time is effectively shortened.

The foregoing description, for purposes of explanation, has been presented in conjunction with specific embodiments. However, the foregoing discussion in some embodiments is not intended to be exhaustive or to limit the implementations to the precise forms disclosed above. Many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the present disclosure and to enable others skilled in the art to best utilize the embodiments.

Claims

1. A display device, comprising:

a controller configured to:

2. The display device of claim 1, wherein the controller further controls the display to display a first portal, the controller further configured to:

3. The display device according to claim 2, wherein the wait page includes a countdown icon, and the countdown icon includes a duration value and/or a progress graphic, wherein the duration value is used to indicate a remaining duration of the controller to acquire the device identifier, an initial value of the duration value is a total duration of the controller to expect to acquire the device identifier, the progress graphic is used to indicate a progress of the controller to acquire the device identifier, and a total duration of the total progress of the controller to acquire the device identifier is equal to the initial value of the duration value.

4. The display device according to claim 2, wherein the controller is configured to:

if the device identification is not acquired after the device identification is acquired again at least once, or the display device is verified to have no use permission of the screen projection function according to the acquired device identification, the display is controlled to display an update failure page, the update failure page comprises a specified number and an operation prompt, the specified number is uniquely corresponding to the device identification, and the operation prompt is used for prompting a user to feed back the specified number to a third-party terminal or a server so as to update the device identification through the third-party terminal or the server.

5. The display device of claim 4, wherein the update failure page further comprises a confirmation option, and wherein the controller is further configured to:

and responding to an instruction input by the user based on the confirmation option, and sending the designated number to the third party terminal or the server in a preset communication mode.

6. The display device according to claim 1, wherein the controller is configured to:

7. The display device according to claim 6, wherein the startup state of the operating system is startup, the target communication mode is a notification that the screen projection application program transmits startup completion to the screen projection process through the screen projection service, and the controller is configured to:

8. The display device of claim 6, wherein the target communication mode is that the screen casting application directly sends a start-up notification to the screen casting process, and wherein the controller is configured to:

9. A display method of a screen projection function page is applied to a display device, the display device displays the screen projection function page, and the screen projection function page contains screen projection information of the display device, and the method comprises the following steps:

responding to an instruction which is input by a user and indicates to display the screen projection function page, and acquiring a device identifier, wherein the device identifier is used for verifying the permission of the display device for using the screen projection function;

and after verifying that the display equipment has the use permission of the screen projection function according to the acquired equipment identification, starting the screen projection function, and controlling the display to display the screen projection function page after the screen projection function is started.

10. The display method according to claim 9, wherein the starting of the screen projecting function and the displaying of the screen projecting function page after the screen projecting function is started comprise: