WO2023142390A1

WO2023142390A1 - Screen mirroring method and apparatus, and device and computer-readable storage medium

Info

Publication number: WO2023142390A1
Application number: PCT/CN2022/103976
Authority: WO
Inventors: 吴媛
Original assignee: 深圳创维－Rgb电子有限公司
Priority date: 2022-01-30
Filing date: 2022-07-05
Publication date: 2023-08-03
Also published as: CN114501090A; CN114501090B

Abstract

Disclosed in the present application are a screen mirroring method and apparatus, and a device and a computer-readable storage medium, which are applied to a screen mirroring receiving end, wherein the screen mirroring receiving end is in communication connection with a screen mirroring transmission end, the screen mirroring transmission end is connected to a first device, and the screen mirroring receiving end is connected to a second device. The screen mirroring method comprises the following steps: receiving a screen mirroring signal from a screen mirroring transmission end, and determining the operational state of a second device; if the operational state is a standby state, sending a wake-up signal to the second device, so as to wake the second device up; and after successfully waking the second device up, performing screen mirroring on the second device.

Description

Screen projection method, device, equipment and computer-readable storage medium

This application claims the priority of a Chinese patent application with application number 202210115322.5 and titled "screen projection method, device, equipment, and computer-readable storage medium" submitted to the China Patent Office on January 30, 2022.

technical field

The present application relates to the field of communication technology, and in particular to a screen projection method, device, equipment and computer-readable storage medium.

Background technique

With the popularity of smart phones, more and more users are willing to pay for rich content sources on mobile phones. However, compared with large-screen devices such as TVs, smart phones currently have smaller screens and limited sound and picture quality. In order to solve the problem of scarce content sources of large-screen devices and the limitations of smart phone screens, picture quality, and sound quality, it is common to cast mobile phone content to large-screen devices through screen projection.

However, the current screen projection methods on the market require the large screen end to be turned on to operate the screen projection, which is not convenient enough to operate.

technical problem

The main purpose of this application is to provide a screen projection method, device, equipment, and computer-readable storage medium, aiming to solve the technical problem that the screen projection can only be operated when the large screen terminal is turned on, and the operation is not convenient enough.

technical solution

In order to achieve the above purpose, the present application provides a screen projection method, the screen projection method is applied to a screen projection receiving end, the screen projection receiving end communicates with a screen projection transmitter, and the screen projection transmitter is connected to a first device , the screen projection method includes the following steps:

receiving a screen projection signal from the screen projection transmitter, and determining the operating state of the second device;

The running state is a standby state, and a wake-up signal is sent to the second device to wake up the second device;

The second device is successfully woken up, and screen projection is performed on the second device.

In an embodiment, the screen projection receiving end includes a first interface, and the step of sending a wake-up signal to the second device to wake up the second device includes:

Sending a wake-up signal to the second device through the first interface, so that a built-in application of the second device responds to the wake-up signal and wakes up the second device.

In an embodiment, the screen projection receiving end further includes a second interface, and the step of successfully waking up the second device, and performing screen projection on the second device includes:

The second device is successfully woken up, and screen projection data is output through the second interface to perform screen projection on the second device.

In an embodiment, the step of determining the operating state of the second device according to the step includes:

Obtaining the operating power of the second device through the second interface, and determining the operating state of the second device based on the operating power.

In an embodiment, the step of determining the operating state of the second device based on the operating power includes:

In response to the operating power being less than a minimum value of a preset power range, determining that the operating state of the second device is a shutdown state;

determining that the operating state of the second device is a standby state in response to the operating power being greater than or equal to a minimum value of the preset power range and less than or equal to a maximum value of the preset power range; or

In response to the operating power being greater than the maximum value of the preset power range, it is determined that the operating state of the second device is a power-on state.

In an embodiment, the screen projection method further includes:

If the running state is the power-on state, output screen projection data through the second interface to project a screen to the second device.

In an embodiment, the built-in application is an application running on the second device at the screen projection receiving end, and the screen projection receiving end responds to the wake-up signal through the application running on the second device and then Wake up the second device.

In an embodiment, the screen projection data includes audio data and video data.

In one embodiment, the operating power is between 0.1-0.6w.

In one embodiment, the running state is a standby state, and sending a wake-up signal to the second device to wake up the second device includes:

The second device is in a standby state, and the screen projection receiving end outputs a wake-up signal through the USB port, and automatically activates an application or a system-level function running on the second device to wake up the second device.

In an embodiment, after successfully waking up the second device, performing screen projection on the second device includes:

After waking up the second device, identify the screen projection signal output by HDMI through digital video interface standards, mobile terminal high-definition audio and video standard interfaces, or screen recording methods, and realize screen projection on the second device.

In an embodiment, the second device is in a power-on state, and there is no need to perform a wake-up operation, and it is sufficient to directly perform a screen projection operation.

In an embodiment, the first interface is a USB interface, and the second interface is an HDMI interface.

In addition, in order to achieve the above purpose, the present application also provides a screen projection device, the screen projection device includes:

The receiving module is used to receive the projection signal;

A determination module is used to determine the operating status of the device to be projected;

A wake-up module, configured to send a wake-up signal to wake up the device to be screen-projected in a standby state;

A screen projection module, configured to project a screen to the device to be projected.

In addition, in order to achieve the above purpose, the present application also provides a screen projection device, which includes: a memory, a processor, and a screen projection program stored in the memory and operable on the processor. When the screen projection program is executed by the processor, the steps of implementing the above screen projection method are implemented.

In addition, in order to achieve the above object, the present application also provides a computer-readable storage medium, on which a screen-casting program is stored, and when the screen-casting program is executed by a processor, the above-mentioned screen-casting program can be realized. method steps.

Beneficial effect

This application proposes a screen projection method, device, equipment, and computer-readable storage medium, which optimizes the screen projection method and overcomes the technical problems of the limitation that the large screen end can only be operated when it is powered on, and that the operation is not convenient. In the screen projection method, when the screen projection signal from the screen projection transmitter is received, the operating state of the second device is determined; avoiding the problem that the screen cannot be projected in certain operating states, resulting in a waste of user operating costs; If the running state is in the standby state, send a wake-up signal to the second device to wake up the second device; after successfully waking up the second device, project a screen to the second device to achieve a more Intelligent wake-up and screen projection reduce the user's operating costs from the entire link and improve the user's operating experience.

Description of drawings

FIG. 1 is a schematic diagram of the terminal structure of the hardware operating environment involved in the solution of the embodiment of the present application;

FIG. 2 is a schematic diagram of the internal structure of the screen projection device involved in the embodiment of the present application;

FIG. 3 is a schematic flow diagram of an embodiment of the screen projection method of the present application;

FIG. 4 is a schematic diagram of an application scenario of an embodiment of the screen projection method of the present application;

FIG. 5 is a schematic structural diagram of an embodiment of a screen projection device of the present application.

The realization, functional features and advantages of the present application will be further described in conjunction with the embodiments and with reference to the accompanying drawings.

Embodiments of the present invention

It should be understood that the specific embodiments described here are only used to explain the present application, and are not intended to limit the present application.

The main solution of the embodiment of the present application is: a screen projection method, the screen projection method is applied to the screen projection receiving end, the screen projection receiving end is connected to the screen projection transmitting end, and the screen projection transmitting end is connected to the first A device, the screen projection method includes the following steps:

When receiving a screen projection signal from the screen projection transmitter, determine the operating state of the second device;

If the operating state is a standby state, sending a wake-up signal to the second device to wake up the second device;

After successfully waking up the second device, screen projection is performed on the second device.

With the popularization of smart phones, more and more users are willing to pay for the rich content sources of mobile phones. However, the larger screens of smart phones currently have smaller screens, and the sound quality and picture quality are limited. In order to solve the problem of scarcity of large screen content sources and limitations of smartphone screens, image quality, and sound quality, a screen projector is now introduced to project small screen content to the large screen.

However, the current screen projection methods on the market require the large screen to be powered on before the screen projection can be performed. The screen projection method is complicated and involves many steps. Moreover, some TVs cannot be turned on quickly and automatically after shielding CEC (Consumer Electronics Control, consumer electronics control channel). Through this channel, the mutual interaction and control between devices on the HDMI CEC Network can be controlled. The role of CEC is that users can use one remote control to control multiple smart devices that support CEC, so that there is no need to use multiple remote controls to control devices, such as: televisions (TVs), set-top boxes, and audio-visual players.

Therefore, how to optimize the screen projection method and overcome the limitation that the large screen terminal can only be operated after it is turned on is an urgent problem to be solved at present.

This application provides a screen projection method, which optimizes the screen projection method and overcomes the technical problem that the large screen terminal can only be operated when it is powered on. In the screen projection method, by receiving the screen projection signal from the transmitter ;Determine the running state of the large screen terminal according to the screen projection signal; avoid the problem that the screen cannot be projected in some running states, resulting in a waste of user operating costs; when the running state meets the preset conditions, wake up based on the preset The signal output port wakes up the large screen terminal and projects the screen to the large screen terminal, realizing a more intelligent wakeup, reducing the user's operating cost from the entire link, and improving the user's operating experience.

As shown in Figure 1, Figure 1 is a schematic diagram of the terminal structure of the hardware operating environment involved in the solution of the embodiment of the present application. The transmitting end 300 is connected in communication, the screen projection transmitting end 300 is connected to the first device 400 , and the screen projection receiving end 200 is connected to the second device 100 .

Wherein, the first device 400 may be a personal computer, or may be a mobile terminal device such as a smart phone, a tablet computer, an e-book reader, a portable computer, etc., and the second device 100 may be a TV or a monitor , projectors and other display devices with display functions.

In some embodiments, the first device 400 is connected to the screen projection transmitter 300 or the screen projection receiver 200 through a wired or wireless network for data transmission and interaction; the screen projection transmitter 300 is connected to the screen projection receiver 200 through a wireless network for data transmission and interaction, or the screen projection transmitter 300 connects to the second device 100 through a wireless network for data transmission and interaction; the screen projection receiver 200 connects to the second device 100 through a wired or wireless network for data transmission and interaction.

In an optional implementation, the wired connection between the screen projection receiving end 200 and the second device 100 and between the screen projection transmitting end 300 and the first device 400 may include HDMI (High Definition Multimedia Interface, USB (Universal Serial Bus, Universal Serial Bus), DP (Display Port, Display Interface) and VGA (Video Graphics Array, Video Graphics Array) and other wired connections. The wireless communication methods between the first device and the screen projection transmitter 300 and the screen projection receiver 200, and between the second device 100 and the screen projection transmitter 300 and the screen projection receiver 200 may include Bluetooth, wireless broadband (Wi-Fi), infrared communication and other wireless communication.

Therefore, the possible connection methods for implementing screen projection between the first device 400, the screen projection transmitter 300, the screen projection receiver 200, and the second device 100 at least include:

The screen projection transmitter 300 is connected to the screen projection receiver 200, and the screen of the first device 400 is finally projected to the second device 100 through the screen projection transmitter 300 and the screen projection receiver 200;

The screen projection transmitter 300 is wirelessly connected to the second device 100, and the screen of the first device 400 is projected to the second device 100 through the screen projection transmitter 300. At this time, the screen projection transmitter 300 and the built-in wireless communication module of the second device 100 pass through wireless network connection;

The first device 400 is connected to the screen projection receiving end 200 , and the screen of the first device 400 is projected to the second device 100 through the screen projection receiving end 200 .

Referring to FIG. 2 , FIG. 2 is a schematic diagram of the internal structure of the screen projection device involved in the solution of the embodiment of the present application. .

As shown in FIG. 2 , the screen projection device includes: a processor 1001 , such as a CPU, a network interface 1004 , a user interface 1003 , a memory 1005 , and a communication bus 1002 . Wherein, the communication bus 1002 is used to realize connection and communication between these components. The user interface 1003 may include a display screen (Display), an input unit such as a keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface and a wireless interface. Optionally, the network interface 1004 may include a standard wired interface and a wireless interface (such as a WI-FI interface). The memory 1005 may be a high-speed RAM memory, or a stable memory (non-volatile memory), such as a disk memory. Optionally, the memory 1005 may also be a storage device independent of the aforementioned processor 1001 . The screen projection device may be a screen projection receiver 200 .

Those skilled in the art can understand that the terminal structure shown in FIG. 2 does not constitute a limitation on the terminal, and may include more or less components than those shown in the figure, or combine some components, or arrange different components.

As shown in FIG. 2 , the memory 1005 as a computer storage medium may include an operating system, a network communication module, a user interface module, and a screen projection program.

In the terminal shown in Figure 2, the network interface 1004 is mainly used to connect to the background server and perform data communication with the background server; the user interface 1003 is mainly used to connect to the client (client) and perform data communication with the client; and the processor 1001 can be used to call the screen projection program stored in the memory 1005, the screen projection program is applied to the screen projection receiving end, the screen projection receiving end communicates with the screen projection transmitter, and the screen projection transmitter is connected to the first device , and do the following:

In an embodiment, the processor 1001 may call the screen projection program stored in the memory 1005, and further perform the following operations:

The screen projection receiving end includes a first interface, and the step of sending a wake-up signal to the second device to wake up the second device includes:

The screen projection receiver also includes a second interface, and after the second device is successfully awakened, the step of projecting the screen to the second device includes:

After successfully waking up the second device, output the screen projection data through the second interface to perform screen projection on the second device.

The step of determining the operating state of the second device according to the step includes:

The step of determining the operating state of the second device based on the operating power includes:

If the operating power is less than the minimum value of the preset power range, determine that the operating state of the second device is a shutdown state;

If the operating power is greater than or equal to the minimum value of the preset power range and less than or equal to the maximum value of the preset power range, determine that the running state of the second device is a standby state;

If the operating power is greater than the maximum value of the preset power range, it is determined that the operating state of the second device is a power-on state.

Referring to FIG. 3 , an embodiment of the present application provides a screen projection method, the screen projection method is applied to the above screen projection receiver 200, the screen projection receiver 200 is connected to the screen projection transmitter 300 in communication, and the screen projection The transmitting end 300 is connected to the first device 400, and the screen projection receiving end 200 is connected to the second device 100, and the screen projection method includes:

Step S10, when receiving a screen projection signal from the screen projection transmitter, determine the operating state of the second device;

It should be noted that the execution subject of this embodiment is the screen projection receiver of the screen projection device, and the screen projection receiver includes a first interface and a second interface. In one embodiment, the first interface is a USB interface. The second interface is an HDMI interface, and the screen projection receiving end is connected to the second device through a USB interface and an HDMI interface, and the USB interface is used to realize power supply to the screen projection receiving end and the screen projection receiving end Data transmission between two devices. Wherein, the screen projection signal may be a signal that the screen projection transmitter and the screen projection receiver are successfully matched and identified, or may be a signal that the screen projection transmitter automatically sends to the screen projection receiver after connecting to the first device, or may be The wake-up signal sent by the user through the screen projection transmitter, etc.

It can be understood that, in this embodiment, the receiving end of the screen projector connected to the large screen terminal can receive the screen projection signal sent from the sending end of the screen projector connected to the mobile terminal.

In this embodiment, the step of determining the operating state of the second device in step S10 includes:

It should be noted that since the second device may have different operating states, some operating states do not support effective screen projection. The operating power of the second device is used to confirm the operating status of the second device.

Specifically, if the operating power is less than the minimum value of the preset power range, determine that the operating state of the second device is the shutdown state;

It can be understood that, in this embodiment, the preset power range is determined according to the actual operating power of the large screen terminal. The power-on state means that the second device is displaying the screen normally, and the power-off state means that the second device has been powered off and cannot be woken up, so it cannot cast a screen. When the operating power is less than 0.1W, it is determined that the The operating state of the second device is the off state. When the operating power is greater than 0.6W, it is determined that the operating state of the second device is the on state. When the operating power is greater than or equal to 0.1W and less than or equal to 0.6W, it is determined that the The running state of the second device is the standby state. At this time, the running state of the second device meets the wake-up and screen projection conditions of this embodiment, and the subsequent steps are continued to wake up and screen-cast the second device. The power threshold can be determined according to the actual situation. This embodiment does not limit the above two thresholds of 0.1W and 0.6W. For example, in another embodiment, the threshold of the second device may be 0.2W and 0.7W, or 0.05W and 0.65W and so on.

Step S20, if the running state is a standby state, sending a wake-up signal to the second device to wake up the second device;

In this embodiment, the step of sending a wake-up signal to the second device in step S20 to wake up the second device includes:

It should be noted that the built-in application is an application running on the second device at the screen projection receiving end, and the screen projection receiving end responds to the wake-up signal through the application running on the second device to wake up the second device. device; correspondingly, the screen projection transmitter for information interaction with the screen projection receiver also obtains the data of the first device by running an application on the first device.

Step S30, after successfully waking up the second device, perform screen projection on the second device.

In this embodiment, step S30 includes:

After successfully waking up the second device, output screen projection data through the second interface to perform screen projection on the second device.

It should be noted that the screen projection data may include audio data and video data, and when the screen projection receiving end sends the screen projection data to the second device through the second interface, that is, the HDMI interface, the The picture on the first device is displayed on the second device, for example, the mobile phone data is transmitted to the TV, so that the TV can display the real-time picture in the mobile phone.

In the specific implementation, the screen projection receiver receives the signal output by the screen projection transmitter to judge the running status of the TV. If the running power is between 0.1 and 0.6w, the TV is in the standby (continuous power) In the power state, the wake-up signal is output through the USB port, and the app (application, application software) or system-level function running in the TV is automatically pulled up through the projection receiving end to wake up the TV. standard), MHL (Mobile High-Definition Link, mobile terminal high-definition audio-visual standard interface) or screen recording method to identify the projection signal output by HDMI and realize the projection.

In addition, in this embodiment, the screen projection method further includes:

It can be understood that, if the second device is in the power-on state, there is no need to perform a wake-up operation, and it is sufficient to directly perform a screen projection operation.

In the specific implementation, the screen projection receiver receives the screen projection signal output by the screen projection transmitter and judges the running status of the second device. If the power is greater than 0.6w, it means that the second device is in the power-on state. If the second device is in the power-on state, it will automatically Identify the audio and video signals contained in the projection signal and perform projection.

In addition, in this embodiment, the screen projection method further includes:

When the running state is the off state, no operation is performed.

It can be understood that if the second device is in a power-off state, it cannot respond to a wake-up signal, nor can it respond to a screen projection signal.

In the specific implementation, the screen projection receiving end receives the screen projection signal output by the screen projection transmitter and judges the running state of the second device. If the power is less than 0.1w, it means that the second device is in the shutdown state; The receiving end of the screen projection does not continue to perform wake-up and screen projection operations.

In this embodiment, a screen projection method is provided, which optimizes the screen projection method and overcomes the limitation that the large screen end can only be operated when it is powered on, and the technical problems of inconvenient operation. In the screen projection method, when When receiving the screen projection signal from the screen projection transmitter, determine the operating state of the second device; avoid the problem that the screen cannot be projected in certain operating states, resulting in a waste of user operating costs; if the operating state is In the standby state, send a wake-up signal to the second device to wake up the second device; after successfully waking up the second device, project the screen to the second device, realizing more intelligent wake-up and projection The screen reduces the user's operating cost from the entire link and improves the user's operating experience.

In this embodiment, for CEC (Consumer Electronics Control, consumer electronics control channel, through which the mutual interaction and control between devices on the HDMI CEC Network can be controlled. The role of CEC is that users can use one remote control to control multiple smart devices that support CEC, so that there is no need to use multiple remote controls to control devices, such as: televisions (TVs), set-top boxes and audio-visual players, etc.) For TV, a method of automatically waking up the TV by outputting a wake-up signal through the USB port of the receiving end of the screen projector is proposed to achieve a more intelligent wake-up. The wake-up signal output through the USB port effectively avoids the problem that some TVs cannot be quickly and automatically turned on after shielding CEC ; The output signal through the HDMI port can provide a data transmission bandwidth of up to 5Gbps, and can transmit uncompressed, high-resolution audio and video signals. The signal is transmitted and the delay is small. This embodiment achieves a more intelligent wake-up. Compared with the existing technology, it breaks away from the limitation of the remote control, simplifies the cumbersome operation process, and connects the sending end and receiving end of the screen projector Combined with the mobile terminal and the large-screen terminal respectively, the user's operation cost is reduced from the entire link, and the technical effect of automatically starting when the TV is in standby (uninterrupted power supply) is realized.

In addition, the above-mentioned screen projection method can also provide an embodiment. In this embodiment, the screen projection receiving end can also return the data in the second device through the USB interface, for example, the TV data is transmitted to the mobile phone, or the user is on the TV. For example, in an interactive question answering video, the user can directly answer the question on the TV, and then the TV can transmit the answer data to the mobile phone through the screen projection device, and the mobile phone can transfer the answer data to the mobile phone. Input it into the video to respond, and then transmit the follow-up screen after answering the question to the TV accordingly, so as to realize the interactive function between devices with large and small screens, instead of only transmitting data from small-screen devices to large-screen devices , in some scenarios, data from large-screen devices is also supported to be sent back to small-screen devices. In one embodiment, user experience is improved, and the problem that users must interact with videos on small-screen devices is avoided.

Referring to FIG. 4, FIG. 4 is a schematic diagram of an application scenario according to an embodiment of the present application. It can be known from FIG. After receiving the wake-up signal, the USB interface 111 of the second device 100 will start the cleaning application/system support 133 so that the second device 100 enters the power-on state from the standby state, and a display screen appears. The video output interface 222 transmits the screen projection to the HDMI audio and video output interface 122 of the second device 100, so that the display screen of the second device 100 displays the display screen from the first device, that is, screen projection is completed.

In addition, the embodiment of the present application also proposes a screen projection device 10. Referring to FIG. 5, the screen projection device 10 includes:

A receiving module 101, configured to receive a screen projection signal;

A determining module 102, configured to determine the operating status of the device to be projected;

A wake-up module 103, configured to send a wake-up signal to wake up the device to be screen-projected in a standby state;

The screen projection module 104 is configured to perform screen projection on the device to be projected.

The screen projection device 10 is used to implement various steps of the screen projection method in the above embodiments.

In addition, the embodiment of the present application also proposes a computer-readable storage medium, where a screen projection program is stored on the computer-readable storage medium, and the screen projection program is applied to a screen projection receiving end, and the screen projection receiving end and the projection screen The screen transmitting end is connected by communication, and the screen projection transmitting end is connected to the first device. When the screen projection program is executed by the processor, the following operations are realized:

In one embodiment, when the screen projection program is executed by the processor, the following operations are also implemented:

It should be noted that, as used herein, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article or system comprising a set of elements includes not only those elements, It also includes other elements not expressly listed, or elements inherent in the process, method, article, or system. Without further limitations, an element defined by the phrase "comprising a..." does not preclude the presence of additional identical elements in the process, method, article or system comprising that element.

The serial numbers of the above embodiments of the present application are for description only, and do not represent the advantages and disadvantages of the embodiments.

Through the description of the above embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus a necessary general-purpose hardware platform, and of course also by hardware, but in many cases the former is better implementation. Based on such an understanding, the technical solution of the present application can be embodied in the form of a software product in essence or the part that contributes to the prior art, and the computer software product is stored in a storage medium (such as ROM/RAM) as described above. , magnetic disk, optical disk), including several instructions to make a terminal device (which may be a mobile phone, computer, server, air conditioner, or network device, etc.) execute the methods described in various embodiments of the present application.

The above are only preferred embodiments of the present application, and are not intended to limit the patent scope of the present application. All equivalent structures or equivalent process transformations made by using the description of the application and the accompanying drawings are directly or indirectly used in other related technical fields. , are all included in the patent protection scope of the present application in the same way.

Claims

A screen projection method, wherein it is applied to a screen projection receiving end, the screen projection receiving end is connected to a screen projection transmitting end, the screen projection transmitting end is connected to a first device, and the screen projection receiving end is connected to a second device , the screen projection method includes the following steps:

receiving a screen projection signal from the screen projection transmitter, and determining the operating state of the second device;

The running state is a standby state, and a wake-up signal is sent to the second device to wake up the second device; and

After successfully waking up the second device, screen projection is performed on the second device.
The screen projection method according to claim 1, wherein the screen projection receiving end includes a first interface, and the step of sending a wake-up signal to the second device to wake up the second device includes:

Sending a wake-up signal to the second device through the first interface, so that a built-in application of the second device responds to the wake-up signal and wakes up the second device.
The screen projection method according to claim 2, wherein the screen projection receiving end further includes a second interface, and the step of successfully waking up the second device and projecting the screen to the second device comprises:

The second device is successfully woken up, and screen projection data is output through the second interface to perform screen projection on the second device.
The screen projection method according to claim 3, wherein the step of determining the operating state of the second device comprises:

Obtaining the operating power of the second device through the second interface, and determining the operating state of the second device based on the operating power.
The screen projection method according to claim 4, wherein the step of determining the operating state of the second device based on the operating power comprises:

In response to the operating power being less than a minimum value of a preset power range, determining that the operating state of the second device is a shutdown state;

determining that the operating state of the second device is a standby state in response to the operating power being greater than or equal to a minimum value of the preset power range and less than or equal to a maximum value of the preset power range; or

In response to the operating power being greater than the maximum value of the preset power range, it is determined that the operating state of the second device is a power-on state.
The screen projection method according to claim 5, wherein the screen projection method further comprises:

The running state is the power-on state, and screen projection data is output through the second interface to project a screen to the second device.
The screen projection method according to any one of claims 3-6, wherein the first interface is a USB interface, and the second interface is an HDMI interface.
The screen projection method according to claim 2, wherein the built-in application is an application running on the second device at the screen projection receiving end, and the screen projection receiving end uses the application running on the second device Responding to the wake-up signal to wake up the second device.
The screen projection method according to claim 2, wherein the screen projection data includes audio data and video data.
The screen projection method according to claim 5, wherein the operating power is between 0.1 and 0.6w.
The screen projection method according to claim 7, wherein the running state is a standby state, and sending a wake-up signal to the second device to wake up the second device includes:

The second device is in a standby state, and the screen projection receiving end outputs a wake-up signal through the USB port, and automatically activates an application or a system-level function running on the second device to wake up the second device.
The screen projection method according to claim 11, wherein the successfully waking up the second device and performing screen projection on the second device comprises:

After waking up the second device, identify the screen projection signal output by HDMI through digital video interface standards, mobile terminal high-definition audio and video standard interfaces, or screen recording methods, and realize screen projection on the second device.
The screen projection method according to claim 5, wherein the screen projection method further comprises:

The second device is in a power-on state, and there is no need to perform a wake-up operation, and it is sufficient to directly perform a screen projection operation.
A screen projection device, wherein the screen projection device includes:

The receiving module is used to receive the projection signal;

A determination module is used to determine the operating status of the device to be projected;

A wake-up module, configured to send a wake-up signal to wake up the device to be screen-projected in a standby state;

A screen projection module, configured to project a screen to the device to be projected.
A screen projection device, wherein the screen projection device includes: a memory, a processor, and a screen projection program stored in the memory and operable on the processor, and the screen projection program is executed by the processor When executed, the steps of the screen projection method according to any one of claims 1 to 12 are realized.