Multi-source multi-screen wireless screen projection system and method based on WiFi soft AP

Abstract

The invention relates to the technical field of wireless screen projection, and discloses a multi-source multi-screen wireless screen projection system and method based on a WiFi soft AP, and the method comprises the following steps: a plurality of transmitters TX are respectively connected with a plurality of input source devices, each TX starts an independent WiFi soft AP, and allows one or more receivers RX to be connected at the same time; a plurality of receivers RX are respectively connected with a plurality of display devices, and a WiFi network identifier SSID and an authentication key PSK of each TX are paired and stored in each RX in advance. According to the invention, each emitter independently establishes a soft AP and supports the dynamic switching connection of the receivers, so that the flexible pairing and efficient data transmission between multiple signal sources and multiple display devices are realized, the parallel processing capability and organization flexibility of the system are remarkably improved, the common problems of network congestion and signal interference in the traditional wireless screen projection are effectively avoided, and the system is suitable for large-scale popularization and application. The stability and the real-time performance of audio and video stream distribution among multiple devices are ensured, and the method is particularly suitable for high-concurrency application requirements in a multi-input multi-output scene.

Description

Technical Field

[0001] This invention relates to the field of wireless screen projection technology, and in particular to a multi-source, multi-screen wireless screen projection system and method based on a WiFi soft AP. Background Technology

[0002] In the current field of wireless screen projection technology, traditional solutions mostly rely on centralized screen projection management in a single network environment. This results in problems such as inflexible pairing between signal sources and display devices, severe network congestion when multiple devices are connected concurrently, high switching latency, and difficulty in supporting simultaneous independent screen projection from multiple input sources to multiple display terminals. These issues limit their application effectiveness in scenarios requiring efficient multi-screen collaboration, such as education, meetings, and business presentations. It is particularly noteworthy that many existing solutions require external routers or network switches for communication. Users must pre-configure all devices to connect to the same local area network, which is cumbersome and lacks the ability to dynamically switch receivers, resulting in poor flexibility and ease of use.

[0003] An existing patent discloses an efficient power management method for a multi-device compatible wireless projection VR box (CN119696095A). The method includes the following steps: acquiring device power consumption data; analyzing the VR box operating mode of the device power consumption data to generate VR box operating mode data, wherein the VR box operating mode data includes standby mode, charging / discharging mode, and wireless projection mode. Existing patents suffer from the problem of VR devices lacking accurate power consumption prediction and dynamic power allocation capabilities under different operating modes. Specifically, traditional VR box power management cannot effectively distinguish the power consumption characteristics of multiple modes such as standby, charging / discharging, and wireless projection, leading to unstable battery life; it fails to perform intelligent power weight allocation based on transmission distance and load changes, resulting in energy waste or insufficient performance; and it lacks a high-frequency real-time power consumption feedback and energy efficiency optimization mechanism, making it difficult to achieve efficient and stable power scheduling and improved battery life in multi-device collaborative scenarios. Summary of the Invention

[0004] This invention provides a multi-source, multi-screen wireless projection system and method based on WiFi soft AP to solve existing technical problems, and solves the problems of traditional solutions that rely on routers or switches, have complex configurations, and cannot dynamically switch between them.

[0005] To solve the above-mentioned technical problems, according to one aspect of the present invention, more specifically, a multi-source, multi-screen wireless projection method based on a WiFi soft AP, comprising the following steps:

[0006] S1. Multiple transmitters TX are connected to multiple input source devices respectively. Each TX starts an independent WiFi soft access point and allows one or more receivers RX to connect at the same time.

[0007] S2. Multiple receivers RX are connected to multiple display devices respectively. Each RX is pre-paired and stores the WiFi network identifier SSID and authentication key PSK of each TX.

[0008] S3. The user selects the input source to be displayed on a certain RX through the control device, that is, selects the target TX;

[0009] S4. The RX dynamically switches to the WiFi soft AP network of the target TX according to the user's selection;

[0010] S5, the target TX pushes the audio and video data streams to all currently connected RXs via the WiFi network;

[0011] S6 and RX receive audio and video streams and play them on the corresponding display devices;

[0012] S7. If the user chooses to switch input sources again, RX repeats steps S4 to S6 to reconnect to the new target TX.

[0013] Furthermore, the SSID and PSK information pre-stored in the RX mentioned in step 2 can be updated through the pairing process or user configuration.

[0014] Furthermore, the user control device mentioned in step 3 includes one or more of the following: a remote control, physical buttons on the RX device, a mobile terminal APP, or a Web control interface.

[0015] Furthermore, in step 5, when the TX pushes the audio and video stream, it uses multicast or unicast to send data to multiple RXs simultaneously.

[0016] Furthermore, the dynamic switching described in step 4 includes disconnecting the WiFi network of the currently connected TX and connecting to the WiFi network of the target TX. The switching process is completed automatically after being triggered by the user.

[0017] Furthermore, multiple RXs can be connected to the same TX simultaneously, at which point each RX displays the same audio and video content.

[0018] Furthermore, the audio and video data streams are encrypted during transmission to ensure transmission security.

[0019] Furthermore, the TX and RX interfaces support input and output from any of the following interfaces: HDMI, DisplayPort, USB Type-C, or VGA, and are compatible with video signals of various resolutions and refresh rates.

[0020] A multi-source, multi-screen wireless projection system based on a WiFi soft AP includes:

[0021] Multiple transmitter TX modules, each connected to an input source device, are used to start and maintain an independent WiFi soft access point and support establishing wireless connections with one or more receiver RX modules;

[0022] Multiple receiver RX modules, each connected to a display device, with a built-in storage unit for pre-storing the WiFi network identifier SSID and authentication key PSK of each TX module;

[0023] The control module is used to receive user commands and instruct the specified RX module to switch to the WiFi network of the target TX module;

[0024] The TX module is used to encode the audio and video data of the input source and push it to all currently connected RX modules via WiFi network;

[0025] The RX module is used to dynamically switch the connected TX module according to user instructions, receive audio and video data streams, decode them, and output them to the display device.

[0026] Furthermore, the aforementioned multi-source, multi-screen wireless projection system based on WiFi soft AP supports multiple RXs simultaneously connecting to different TXs, enabling multiple independent audio and video projections.

[0027] In addition, this multi-source, multi-screen wireless projection system based on WiFi soft APs may optionally include a central control module for centralized management of the working status, network connectivity, and projection policies of all TX and RX devices. Users can view the status of each device in real time, configure network parameters in batches, and uniformly schedule projection tasks through the central control interface. It also supports remote firmware upgrades and log collection, further improving the manageability and maintainability of the system.

[0028] This invention provides a multi-source, multi-screen wireless projection system and method based on a WiFi soft AP. Compared with existing technologies, this method achieves the following advantages:

[0029] 1. This invention enables flexible pairing and efficient data transmission between multiple signal sources and display devices by establishing independent soft access points for each transmitter and supporting dynamic switching connections for receivers. This significantly improves the system's parallel processing capabilities and organizational flexibility, effectively avoiding network congestion and signal interference problems common in traditional wireless screen projection. It ensures the stability and real-time performance of audio and video streams distributed across multiple devices, making it particularly suitable for high-concurrency applications in multi-input, multi-output scenarios. Furthermore, the system uses a point-to-point direct connection method, eliminating the need for external routers or switches, achieving true plug-and-play functionality and greatly simplifying the user deployment process.

[0030] 2. By pre-storing network information of each transmitter and multiple user control methods in the receiver, the system greatly simplifies the operation process of device pairing and signal source switching, improves the user's interactive convenience and efficiency, and supports multiple remote and local control methods to meet the flexible management needs of different application environments and reduce the complexity of system maintenance and operation.

[0031] 3. This invention employs a combination of multicast and unicast mechanisms and encryption protocols during data transmission, which optimizes network bandwidth utilization, enables synchronous content distribution, and ensures the security and integrity of audio and video data during transmission, protecting user privacy and information security. It is suitable for commercial, medical, and educational settings where high data transmission quality and security are required.

[0032] 4. By supporting multiple receivers to connect to the same or different transmitters simultaneously, the system can realize various screen projection modes such as one-to-many and many-to-many, meeting the diverse needs of shared display and personalized content distribution, and is compatible with video signals of various resolutions and refresh rates, ensuring a high-quality audio-visual experience and enhancing the system's adaptability and practical value in various application scenarios.

[0033] 5. This invention possesses excellent scalability and maintainability. It not only supports rapid network access and configuration updates for new devices, but also further expands coverage and signal stability by connecting to Wi-Fi signal relay devices. This allows for flexible system scaling based on actual needs, making it suitable for deployments and applications ranging from small-scale home entertainment to large-scale venue displays. The system requires no pre-configuration of the network environment; it automatically forms a network upon power-on, significantly reducing the user's learning curve and technical burden. Attached Figure Description

[0034] Figure 1 This is a schematic diagram showing that RX1 and RX3 are respectively connected to the input sources TX2 and TX4, while RX2 and RX4 are simultaneously connected to the input source TX3.

[0035] Figure 2 This is a schematic diagram showing that each RX is connected to the same TX input source in this invention;

[0036] Figure 3 This is a schematic diagram illustrating how each RX unit of the present invention is connected to a different TX input source. Detailed Implementation

[0037] To make the technical solution of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0038] Example 1

[0039] like Figure 1As shown, according to one aspect of the present invention, a multi-source, multi-screen wireless projection method based on a WiFi soft AP is provided, comprising the following steps:

[0040] Step 1: Multiple transmitters (TXs) connect to multiple input source devices. Each TX activates an independent WiFi soft access point (SoftAP), allowing one or more receivers (RXs) to connect simultaneously. By independently activating the WiFi softAP on each transmitter (TX), independent network isolation is achieved for the input source devices, avoiding signal interference and bandwidth contention between multiple devices. This improves system stability and concurrent processing capabilities, supports one-to-many connection mode, and enhances system flexibility and scalability. The system adopts a point-to-point direct connection architecture, eliminating the need for external routers or switches, greatly simplifying network deployment.

[0041] Step 2: Multiple receivers (RX) connect to multiple display devices respectively. Each RX is pre-paired and stores the WiFi network identifier (SSID) and authentication key (PSK) of each TX. The SSID and PSK information pre-stored in the RX can be updated through the pairing process or user configuration. Pre-pairing and storing the SSID and PSK information of each TX in the receivers significantly simplifies the connection process between devices. Users do not need to repeatedly enter network information, improving system usability and connection efficiency. Simultaneously, supporting information updates through pairing or configuration enhances the system's adaptability and maintainability.

[0042] Step 3: The user selects the desired input source for a given RX (radius) display via a control device, i.e., selects the target TX. This step involves using one or more of the following control devices: a remote control, physical buttons on the RX device, a mobile app, or a web control interface. Users can flexibly select the display content through various control devices (such as remote controls, apps, and web interfaces), achieving diverse and convenient human-computer interaction, meeting control needs in different scenarios, and improving the system's practicality and user experience.

[0043] Step 4: The RX dynamically switches to the WiFi soft AP network of the target TX based on the user's selection. This dynamic switching involves disconnecting the currently connected TX's WiFi network and connecting to the target TX's WiFi network. The switching process is completed automatically after being triggered by the user. The RX's ability to dynamically switch to the target TX's WiFi network based on user commands achieves fast and automated network switching, avoiding the tedious manual reconnection process and improving system response speed and operational efficiency.

[0044] Step 5: The target TX pushes the audio and video data stream to all currently connected RXs via the WiFi network. In this step, the TX uses multicast or unicast to send data to multiple RXs simultaneously. The target TX's use of multicast or unicast to simultaneously push audio and video streams to multiple RXs effectively utilizes network bandwidth, supports multiple devices to receive the same content synchronously, and ensures the real-time and consistency of data distribution. This is suitable for multi-screen synchronous display scenarios such as meetings and education.

[0045] Step Six: The RX receives the audio and video streams and plays them on the corresponding display device. After receiving and decoding the audio and video streams, the RX outputs them to the display device, achieving high-quality audio and video playback, ensuring the synchronization and smoothness of the picture and sound, and improving the display effect and the viewing experience of the end user.

[0046] Step 7: If the user chooses to switch input sources again, the RX will repeat steps 4 to 6 to reconnect to the new target TX. The system supports multiple input source switching by the user, and the RX can repeatedly execute the network switching and data reception process, demonstrating the system's high reusability and strong fault tolerance, meeting dynamic and changing usage needs, and enhancing the system's practicality and reliability.

[0047] Multiple RXs can be connected to the same TX simultaneously, and each RX displays the same audio and video content.

[0048] Audio and video data streams are encrypted during transmission to ensure security. TX and RX support input and output from any of the following interfaces: HDMI, DisplayPort, USB Type-C, or VGA, and are compatible with video signals of various resolutions and refresh rates.

[0049] Example 2

[0050] A multi-source, multi-screen wireless projection system based on a WiFi soft AP includes:

[0051] Multiple transmitter (TX) modules, each connected to an input source device, are used to start and maintain an independent WiFi soft access point (SoftAP) and support establishing wireless connections with one or more receiver (RX) modules; multiple receiver (RX) modules, each connected to a display device, have built-in storage units for pre-storing the WiFi network identifier (SSID) and authentication key (PSK) of each TX module; and a control module for receiving user commands to instruct a specified RX module to switch to the WiFi network of the target TX module.

[0052] The TX module encodes the audio and video data from the input source and pushes it to all currently connected RX modules via the WiFi network. The RX module dynamically switches the connected TX module according to user commands, receives the audio and video data stream, decodes it, and outputs it to the display device. The system supports multiple RX modules simultaneously connecting to different TX modules, enabling multiple independent audio and video projections.

[0053] The TX module includes an HDMI input interface, a video encoding unit, a Wi-Fi chip, and a soft AP function unit. The RX module includes an HDMI output interface, a video decoding unit, a Wi-Fi chip, and a network switching control unit. The control module can be one or more of the following: an independent remote control device, physical buttons integrated into the RX module, a mobile terminal APP, or a web server. Both the TX and RX modules support Wi-Fi communication in the 5GHz and / or 2.4GHz frequency bands.

[0054] The TX and RX modules connect directly point-to-point via WiFi, without the need for additional routers or network switches, achieving true plug-and-play functionality. The RX module supports seamless switching technology when changing TX connections to minimize black screen or video interruption time. The multi-source, multi-screen wireless projection system based on WiFi soft APs supports multiple RX modules simultaneously connecting to different TX modules, enabling multiple independent audio and video projections.

[0055] Example 3

[0056] Multimedia Classroom Application. In a multimedia classroom, the teacher's computer is connected to TX1 as an input source, and a presentation tablet is connected to TX2 as another input source. Two projectors (RX1 and RX2) and four student group displays (RX3-RX6) serve as receiving display devices. All RX devices have pre-stored the SSID and PSK of TX1 and TX2. The teacher uses a central control tablet to select RX1 or RX2 to display computer content, and RX3-RX6 to display the tablet's projection content. The system can switch any student screen to the teacher's computer screen at any time according to teaching needs, enabling synchronous explanation of key content. The system responds quickly, provides stable and lag-free visuals, supports high-definition video transmission, and improves the quality and efficiency of interactive teaching. The system does not rely on the classroom's existing network router; it automatically forms a network upon power-on, greatly simplifying deployment and maintenance.

[0057] Example 4

[0058] Enterprise Multi-Meeting Room Collaboration System. A company has three meeting rooms (A, B, and C), each equipped with a TX device connected to a local computer, and multiple displays (RX) supporting mobile deployment. During important meetings, the presentation content from meeting A needs to be simultaneously projected onto the displays of meeting B and meeting C. The RX device in meeting B selects and connects to the TX device in meeting A via a control terminal, and meeting C does the same, enabling real-time synchronous viewing by all parties. If it is necessary to switch to the local content in meeting B during the meeting, meeting C can quickly switch the signal source via a control app. The system automatically completes network reconnection and stream reception, ensuring efficient meeting operation.

[0059] Example 5

[0060] Commercial Digital Signage System. A commercial center deploys multiple digital advertising screens (RX1-RX10), each connected to multiple media players (TX1-TX5) as signal sources. The central control room manages the content displayed on each screen through a web control interface. During holidays, all screens need to be switched to the same promotional video (TX3 signal); on weekdays, different advertisements are played in different areas. After the control system commands are issued, each RX automatically disconnects its current TX and connects to TX3, receiving the multicast stream and playing it synchronously. The system supports sudden content switching with smooth transitions and no black screen delays, enhancing the flexibility and real-time nature of advertising.

[0061] Example 6

[0062] Multi-room entertainment sharing for the family. The home has three signal sources: a Blu-ray player (connected to TX1), a game console (connected to TX2), and a network TV box (connected to TX3). The TVs in the three rooms are connected to RX1, RX2, and RX3 respectively. Users can switch any TV in any room to a different signal source at any time via a mobile app. For example, the living room TV (RX1) usually displays content from the network box, but family members can switch to the game screen with a single click, while the bedroom TV (RX2) can independently play Blu-ray movies. The system supports multiple devices watching the same content simultaneously or independently, catering to both sharing and personalization needs.

[0063] Example 7

[0064] Exhibition Display and Venue Guides. A museum has deployed multiple exhibition areas, each equipped with an independent media terminal (TX) to play relevant videos. Visitors can freely choose to listen to the explanations of different exhibition areas using handheld mobile devices (RX) or fixed booth screens (RX). Visitors select a target TX by scanning a QR code or using the on-site terminal, and the device automatically switches to the WiFi network and receives the audio and video streams. The system supports multiple people accessing the same TX simultaneously and also allows for quick switching between different exhibition areas, enhancing the personalization and interactivity of the visiting experience.

[0065] Example 8

[0066] Multi-screen medical imaging consultation system. In a hospital radiology department, multiple medical imaging devices (such as CT and MRI) are connected to a TX (transfer) device. Multiple high-definition displays (RX) in the doctor's examination room pre-store all TX network information. During consultations, the chief physician selects and retrieves images from different devices via a touchscreen control terminal and projects them onto designated displays for comparison. The system supports independent or simultaneous display of the same image on multiple screens, and uses encryption protocols during transmission to ensure patient data security, improve diagnostic efficiency, and enhance team collaboration.

[0067] Example 9

[0068] Example of a central control system. This system is deployed in a large conference center, adding a central control server (including a web management interface). Administrators can use this interface to view the real-time status of all TX and RX devices, signal source content, and network quality. They can also issue batch commands, such as switching all RX devices to a specific TX signal source or setting different display strategies for groups. The system supports automated task orchestration, such as timed switching of signal sources and grouping specific content for playback, greatly improving management efficiency and system intelligence.

[0069] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A multi-source, multi-screen wireless screen projection method based on a WiFi soft AP, characterized in that, Includes the following steps: S1. Multiple transmitters TX are connected to multiple input source devices respectively. Each TX starts an independent WiFi soft access point and allows one or more receivers RX to connect at the same time. S2. Multiple receivers RX are connected to multiple display devices respectively. Each RX is pre-paired and stores the WiFi network identifier SSID and authentication key PSK of each TX. S3. The user selects the input source to be displayed on a certain RX through the control device, that is, selects the target TX; S4. The RX can dynamically switch to the WiFi soft AP network of the target TX according to the user's selection; S5, the target TX pushes the audio and video data streams to all currently connected RXs via the WiFi network; S6 and RX receive audio and video streams and play them on the corresponding display devices; S7. If the user chooses to switch input sources again, RX repeats steps S4 to S6 to reconnect to the new target TX.

2. The multi-source, multi-screen wireless projection method based on a WiFi soft AP according to claim 1, characterized in that: The SSID and PSK information pre-stored in the RX mentioned in step 2 can be updated through the pairing process or user configuration.

3. The multi-source, multi-screen wireless projection method based on a WiFi soft AP according to claim 1, characterized in that: The user control device mentioned in step 3 includes one or more of the following: a remote control, physical buttons on the RX device, a mobile terminal APP, or a Web control interface.

4. The multi-source, multi-screen wireless projection method based on WiFi soft AP according to claim 1, characterized in that: The dynamic switching described in step 4 includes disconnecting the WiFi network of the currently connected TX and connecting to the WiFi network of the target TX. The switching process is completed automatically after being triggered by the user.

5. The multi-source, multi-screen wireless projection method based on a WiFi soft AP according to claim 1, characterized in that: In step 5, when pushing audio and video streams via TX, data is sent to multiple RXs simultaneously using either multicast or unicast.

6. The multi-source, multi-screen wireless projection method based on a WiFi soft AP according to claim 1, characterized in that: Multiple RXs can be connected to the same TX simultaneously, and each RX will display the same audio and video content.

7. The multi-source, multi-screen wireless projection method based on WiFi soft AP according to claim 1, characterized in that: The audio and video data streams are encrypted during transmission.

8. The multi-source, multi-screen wireless projection method based on WiFi soft AP according to claim 1, characterized in that: The TX and RX interfaces support input and output from any of the following interfaces: HDMI, DisplayPort, USB Type-C, or VGA.

9. A multi-source, multi-screen wireless projection system based on a WiFi soft AP, characterized in that, The multi-source, multi-screen wireless projection method based on a WiFi soft AP, applicable to any one of claims 1-8, wherein the multi-source, multi-screen wireless projection system based on a WiFi soft AP comprises: Multiple transmitter TX modules, each connected to an input source device, are used to start and maintain an independent WiFi soft access point and support establishing wireless connections with one or more receiver RX modules; Multiple receiver RX modules, each connected to a display device, with a built-in storage unit for pre-storing the WiFi network identifier SSID and authentication key PSK of each TX module; The control module is used to receive user commands and instruct the specified RX module to switch to the WiFi network of the target TX module; The TX module is used to encode the audio and video data of the input source and push it to all currently connected RX modules via WiFi network; The RX module is used to dynamically switch the connected TX module according to user instructions, receive audio and video data streams, decode them, and output them to the display device.

10. The multi-source, multi-screen wireless projection system based on a WiFi soft AP according to claim 9, characterized in that: The aforementioned multi-source, multi-screen wireless projection system based on WiFi soft AP supports multiple RXs simultaneously connecting to different TXs, enabling multiple independent audio and video projections.

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