Wireless screen projection system

Abstract

The utility model provides a wireless projection system. The wireless projection system comprises: a projection transmitting end, a projection signal transmission interface, a first signal conversion unit connected with the projection signal transmission interface, a first display signal interface connected with the first signal conversion unit and a first millimeter wave wireless communication unit connected with the first display signal interface; the first signal conversion unit is used for converting the projection signal into the projection data compatible with the first display signal interface; a projection receiving end, a second millimeter wave wireless communication unit, a second display signal interface connected with the second millimeter wave wireless communication unit, a second signal conversion unit connected with the second display signal interface and a projection data output interface connected with the second signal conversion unit; the communication protocol type of the second display signal interface is same with the communication protocol type of the first display signal interface. The utility model aims at improving the projection response speed and the projection picture quality of wireless projection system, and then improves the projection effect.

Description

Technical Field

[0001] This utility model relates to the field of wireless communication technology, specifically to a wireless screen projection system. Background Technology

[0002] The current wireless screen mirroring method mainly involves transmitting screen mirroring data between the screen mirroring party and the screen mirroring party to achieve the screen mirroring of the screen mirroring party's data to the screen mirroring party. However, in order to ensure low screen mirroring latency, the image quality of the screen mirroring data is usually greatly compressed, which ultimately reduces the screen mirroring effect. Utility Model Content

[0003] One objective of this invention is to provide a wireless screen projection system that aims to improve the image quality of projected data and enhance the projection effect.

[0004] According to one aspect of the present invention, a wireless screen projection system is provided, the wireless screen projection system comprising:

[0005] The screen projection transmitter includes a screen projection signal transmission interface, a first signal conversion unit connected to the screen projection signal transmission interface, a first display signal interface connected to the first signal conversion unit, and a first millimeter-wave wireless communication unit connected to the first display signal interface; the first signal conversion unit is used to convert the screen projection signal into screen projection data compatible with the first display signal interface;

[0006] The screen projection receiver includes a second millimeter-wave wireless communication unit, a second display signal interface connected to the second millimeter-wave wireless communication unit, a second signal conversion unit connected to the second display signal interface, and a screen projection data output interface connected to the second signal conversion unit. The communication protocol type of the second display signal interface is the same as that of the first display signal interface. The second millimeter-wave wireless communication unit is used to communicate wirelessly with the first millimeter-wave wireless communication unit and receive the screen projection data sent by the first millimeter-wave wireless communication unit. The second signal conversion unit is used to convert the signal output by the second display signal interface into screen projection data compatible with the screen projection data output interface.

[0007] In some embodiments of this utility model, based on the above technical solutions, the first millimeter-wave wireless communication unit includes a first millimeter-wave wireless transceiver, the first display signal interface includes a first auxiliary data channel, and the projection transmitter further includes a first control unit connected to the first millimeter-wave wireless transceiver and the first auxiliary data channel; the first control unit is used to transmit handshake information between the first auxiliary data channel and the first millimeter-wave wireless transceiver, and the first millimeter-wave wireless transceiver is used to transmit the handshake information with the second millimeter-wave wireless communication unit;

[0008] The second millimeter-wave wireless communication unit includes a second millimeter-wave wireless transceiver, the second display signal interface includes a second auxiliary data channel, and the projection receiver further includes a second control unit connected to the second millimeter-wave wireless transceiver and the second auxiliary data channel; the second millimeter-wave wireless transceiver is used to transmit the handshake information between the first millimeter-wave wireless transceiver and the second millimeter-wave wireless transceiver, and the second control unit is used to transmit the handshake information between the second auxiliary data channel and the second millimeter-wave wireless transceiver.

[0009] In some embodiments of this utility model, based on the above technical solutions, the first display signal interface includes a first auxiliary data channel; the projection transmitter further includes a first infrared module connected to the first auxiliary data channel; the first infrared module is used to receive a first handshake signal from the first auxiliary data channel, send the first handshake signal to the second infrared module, receive a second handshake signal returned by the second infrared module, and forward the second handshake signal to the first auxiliary data channel;

[0010] The second display signal interface includes a second auxiliary data channel, and the projection receiver further includes a second infrared module connected to the second auxiliary data channel. The second infrared module is used to receive the first handshake signal, forward the first handshake signal to the second auxiliary data channel, receive the second handshake signal sent by the second auxiliary data channel, and send the second handshake signal to the first infrared module.

[0011] In some embodiments of this utility model, based on the above technical solutions, the projection receiving end further includes a magnet, which is used to emit a magnetic field;

[0012] The projection transmitter also includes a Hall sensor, which is used to send a first connection status indication signal to the first display signal interface when the magnetic field is detected. The first connection status indication signal is used to instruct the first display signal interface to communicate. The Hall sensor is also used to send a second connection status indication signal to the first display signal interface when the magnetic field is not detected. The second connection status indication signal is used to instruct the first display signal interface to stop communicating.

[0013] In some embodiments of this utility model, based on the above technical solutions, the first millimeter-wave wireless communication unit further includes a millimeter-wave transmitter, and the first display signal interface includes a first video data transmission channel connected to the millimeter-wave transmitter; the first video data transmission channel is used to send the screen projection data after the first auxiliary data channel completes the handshake.

[0014] The second millimeter-wave wireless communication unit includes a millimeter-wave receiver, and the second display signal interface includes a second video data transmission channel connected to the millimeter-wave receiver; the second video data transmission channel is also used to receive the projection data after the second auxiliary data channel completes its handshake.

[0015] In some embodiments of this utility model, based on the above technical solutions, the screen projection receiver further includes: a power supply interface and a wireless charging uplink unit connected to the power supply interface; the power supply interface is also used to supply power to the screen projection receiver.

[0016] The projection transmitter further includes: a wireless charging downlink unit, a charging control unit connected to the wireless charging downlink unit, and a charging output interface connected to the charging control unit; the wireless charging downlink unit is used to supply power to the projection transmitter.

[0017] In some embodiments of this utility model, based on the above technical solutions, the charging control unit and the first signal conversion unit are integrated in a signal conversion circuit, and the signal conversion circuit is connected to the first display signal interface and the projection signal transmission interface.

[0018] In some embodiments of this utility model, based on the above technical solutions, the projection transmitter further includes a first DC power management module. The input terminal of the first DC power management module is connected to the wireless charging downlink unit, and the output terminal of the first DC power management module is connected to the signal conversion circuit. The first DC power management module is also used to supply power to the circuit components of the projection transmitter.

[0019] The screen projection receiver also includes a second DC power management module connected to the power supply interface. The second DC power management module is also used to supply power to the circuit components of the screen projection receiver.

[0020] In some embodiments of this utility model, based on the above technical solutions, the communication protocol type of both the first display signal interface and the second display signal interface is DisplayPort;

[0021] The communication protocol type of the screen projection data output interface is HDMI or VGA;

[0022] A second signal conversion unit is also connected between the second display signal interface and the screen projection data output interface. The second signal conversion unit is used to convert the screen projection data of the DisplayPort protocol into screen projection data compatible with the HDMI protocol or VGA protocol.

[0023] In some embodiments of this utility model, based on the above technical solutions, the projection signal transmission interface includes a Type-C interface and a USB 2.0 interface, the first display signal interface is DisplayPort, and the first signal conversion unit is used to convert the signal output from the Type-C interface and the signal output from the USB 2.0 interface into a DisplayPort compatible signal.

[0024] In the embodiments provided by this utility model, the wireless screen projection system includes a screen projection transmitter and a screen projection receiver. The screen projection transmitter includes a screen projection signal transmission interface, a first signal conversion unit connected to the screen projection signal transmission interface, a first display signal interface connected to the first signal conversion unit, and a first millimeter-wave wireless communication unit connected to the first display signal interface. The screen projection receiver includes a second millimeter-wave wireless communication unit, a second display signal interface connected to the second millimeter-wave wireless communication unit, a second signal conversion unit connected to the second display signal interface, and a screen projection data output interface connected to the second signal conversion unit. The communication protocol type of the second display signal interface is the same as that of the first display signal interface. The first signal conversion unit converts the projection signal into projection data compatible with the first display signal interface. The first display signal interface can send the projection data to the first millimeter-wave wireless communication unit, and the first millimeter-wave wireless communication unit can communicate wirelessly with the second millimeter-wave wireless communication unit and receive the projection data sent by the first millimeter-wave wireless communication unit. In this process, the first and second signal conversion units can improve the compatibility of the projection signal. In the process of transmitting projection data between the first and second millimeter-wave wireless communication units, a large amount of projection data can be transmitted at a very fast speed. On this basis, there is no need to compress the projection data significantly, and projection data with extremely high image quality can be transmitted. With relatively low projection latency, the image quality of the projection data can be improved, thus improving the projection effect.

[0025] Other features and advantages of this invention will become apparent from the following detailed description, or may be learned in part by practice of this invention.

[0026] It should be understood that the above general description and the following detailed description are merely exemplary and do not limit the present invention. Attached Figure Description

[0027] The above and other objectives, features and advantages of the present invention will become more apparent from a detailed description of exemplary embodiments thereof with reference to the accompanying drawings.

[0028] Figure 1 A schematic diagram of a wireless screen projection system according to an embodiment of the present invention is shown.

[0029] Figure 2 A schematic diagram showing the specific structure of a wireless screen projection system, a screen projection device, and a screen projection data display device according to an embodiment of the present invention is provided.

[0030] Figure 3A schematic diagram showing a multi-channel connection between a DisplayPort source and a DisplayPort receiver according to an embodiment of the present invention is shown.

[0031] Figure 4 A schematic diagram is shown in a specific application scenario according to the present invention.

[0032] Explanation of reference numerals in the attached figures:

[0033] 10. Screen projection transmitter; 11. First display signal interface; 12. First signal conversion unit; 13. Screen projection signal transmission interface; 14. First millimeter-wave wireless communication unit; 15. Signal conversion circuit; 16. First video data transmission channel; 17. First auxiliary data channel; 18. FPGA1; 19. MCU1; 110. Millimeter-wave transmitter; 111. First DC power management module; 112. Wireless charging downlink unit; 113. First millimeter-wave wireless transceiver.

[0034] Projection receiver-20; Second millimeter-wave wireless communication unit-21; Second display signal interface-22; Projection data output interface-23; Second auxiliary data channel-24; Second video data transmission channel-25; Second signal conversion unit-26; Millimeter-wave receiver-27; Wireless charging uplink unit-28; Power supply interface-29; Second millimeter-wave wireless transceiver-210; FPGA2-211, MCU2-212, Second DC power management module-213; Projection device-30; Projection data display device-40; Power supply-50. Detailed Implementation

[0035] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, they are provided to make the description of the present invention more comprehensive and complete, and to fully convey the concept of the exemplary embodiments to those skilled in the art. The drawings are merely illustrative of the present invention and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and therefore repeated descriptions of them will be omitted.

[0036] Furthermore, the described features, structures, or characteristics can be combined in any suitable manner in one or more exemplary embodiments. Numerous specific details are provided in the following description to give a full understanding of exemplary embodiments of the present invention. However, those skilled in the art will recognize that the technical solutions of the present invention can be practiced with one or more specific details omitted, or other methods, components, steps, etc., can be employed. In other instances, well-known structures, methods, implementations, or operations are not shown or described in detail to avoid obscuring various aspects of the present invention.

[0037] Some of the block diagrams shown in the accompanying drawings are functional entities and do not necessarily correspond to physically or logically independent entities. These functional entities can be implemented in software, in one or more hardware modules or integrated circuits, or in different network and / or processor devices and / or control unit devices.

[0038] Figure 1 A wireless screen projection system according to an embodiment of the present invention is shown. The wireless screen projection system includes a screen projection transmitter 10 and a screen projection receiver 20.

[0039] The screen projection transmitter 10 receives screen projection signals from the projection device and sends screen projection data to the screen projection receiver 20. The screen projection transmitter 10 includes a screen projection signal transmission interface 13, a first signal conversion unit 12 connected to the screen projection signal transmission interface 13, a first display signal interface 11 connected to the first signal conversion unit 12, and a first millimeter-wave wireless communication unit 14 connected to the first display signal interface 11. The first signal conversion unit 12 converts the screen projection signal into screen projection data compatible with the first display signal interface 11.

[0040] The screen projection signal transmission interface 13 is a data interface used to receive screen projection signals from the projection device, which is any device that needs to project its screen display to other display devices. The screen projection signal transmission interface 13 can be wired to the projection device, such as a smartphone, tablet, or other computer device. The screen projection signal transmission interface 13 may be a Type-C data interface.

[0041] The first signal conversion unit 12 is used to convert the projection signal output from the projection signal transmission interface 13 into projection data compatible with the first display signal interface 11. For example, if the signal output from the projection signal transmission interface 13 is a Type-C signal, while the first display signal interface 11 is a DP interface, then the first signal conversion unit 12 can convert the Type-C signal into a DP signal. The first signal conversion unit 12 is, for example, a VL102-Q4, but other chips that implement signal conversion can also be used, and there is no limitation here.

[0042] The first display signal interface 11 is used to send projection data to the projection receiver 20. It is connected to a first millimeter-wave wireless communication unit 14, which is a unit of the projection transmitter 10 that performs wireless communication based on millimeter waves. The first millimeter-wave wireless communication unit 14 is, for example, an ST60 chip.

[0043] In one embodiment, the projection transmitter 10 can be a housing that can accommodate the projection device. The projection signal transmission interface 13 of this housing can be connected to the data interface of the projection device, and the projection signal is transmitted through the data interface. The housing includes a protective layer to provide physical protection for the projection device, reducing the risk of physical damage to a certain extent. In this way, the projection transmitter 10 can be built into the "protective housing" component, eliminating the need to install a separate protective housing and projection transmitter 10 for the projection device, greatly improving the ease of use of the wireless projection system. Furthermore, the form of the projection transmitter 10 is not limited to this and can also be other forms.

[0044] The projection receiver 20 includes a second millimeter-wave wireless communication unit 21, a second display signal interface 22 connected to the second millimeter-wave wireless communication unit 21, a second signal conversion unit 26 connected to the second display signal interface 22, and a projection data output interface 23 connected to the second signal conversion unit 26. The communication protocol type of the second display signal interface 22 is the same as that of the first display signal interface 11. The second millimeter-wave wireless communication unit 21 is used to communicate wirelessly with the first millimeter-wave wireless communication unit 14 and to receive projection data sent by the first millimeter-wave wireless communication unit 14.

[0045] The screen projection receiver 20 receives screen projection data from the screen projection transmitter 10 and sends the screen projection data to the screen projection data display device. The second millimeter-wave wireless communication unit 21 is a unit of the screen projection receiver 20 that performs wireless communication based on millimeter waves. The second millimeter-wave wireless communication unit 21 is, for example, an ST60 chip.

[0046] The second display signal interface 22 can communicate with the second millimeter-wave wireless communication unit 21 and receive the projection data from the second millimeter-wave wireless communication unit 21. The communication protocol type of the second display signal interface 22 is the same as that of the first display signal interface 11, thus ensuring compatibility in receiving projection data sent by the first display signal interface 11. The projection data output interface 23 is used to output the projection data to the projection data display device, which is used to display the projection data.

[0047] In one embodiment, the projection transmitter 10 is housed in a casing that can accommodate the projection device. The projection receiver 20 is housed in a base. When the casing containing the projection transmitter 10 is placed on the base, the projection device sends a projection signal to the projection transmitter 10. Wireless communication occurs between the first millimeter-wave wireless communication unit 14 of the projection transmitter 10 and the second millimeter-wave wireless communication unit 21 of the projection receiver 20. The projection receiver 20 receives the projection data and outputs it to a display via the projection data output interface 23, thereby projecting the image from the projection device onto the display. This method allows for rapid transmission of high-quality projection data, improving the projection effect.

[0048] Using the above method, large amounts of screen-casting data can be transmitted at very high speeds. Furthermore, there is no need to significantly compress the screen-casting data, allowing for the transmission of screen-casting data with extremely high image quality. With relatively low screen-casting latency, the image quality of the screen-casting data can be improved, thus enhancing the screen-casting effect.

[0049] Figure 2 A detailed architectural diagram of a wireless screen projection system according to an embodiment of the present invention is shown, comprising the screen projection device and the screen projection data display device. The wireless projection system includes a projection transmitter 10, a first display signal interface 11, a projection signal transmission interface 13, a signal conversion circuit 15, a first video data transmission channel 16, a first auxiliary data channel 17, a first field-programmable gate array (FPGA) FPGA1 (18), a first microcontroller unit MCU1 (19), a millimeter-wave transmitter 110, a first DC power management module 111, a wireless charging downlink unit 112, a first millimeter-wave wireless transceiver 113, a projection receiver 20, a second display signal interface 22, a projection data output interface 23, a second auxiliary data channel 24, a second video data transmission channel 25, a second signal conversion unit 26, a millimeter-wave receiver 27, a wireless charging uplink unit 28, a power supply interface 29, a second millimeter-wave wireless transceiver 210, a second field-programmable gate array FPGA2 (211), a second microcontroller unit MCU2 (212), and a second DC power management module 213. The projection transmitter 10 is connected to the projection device 30 through the projection signal transmission interface 13. The screen projection receiver 20 is connected to the screen projection data display device 40 via the screen projection data output interface 23. The power supply interface 29 is connected to the power supply 50.

[0050] In one embodiment, the first millimeter-wave wireless communication unit includes a first millimeter-wave wireless transceiver 113, the first display signal interface 11 includes a first auxiliary data channel 17, and the projection transmitter 10 further includes a first control unit connecting the first millimeter-wave wireless transceiver 113 and the first auxiliary data channel 17; the first control unit is used to transmit handshake information between the first auxiliary data channel 17 and the first millimeter-wave wireless transceiver 113, and the first millimeter-wave wireless transceiver 113 is used to transmit handshake information with the second millimeter-wave wireless communication unit.

[0051] The first millimeter-wave wireless transceiver 113, such as the ST60 A3, operates in half-duplex mode, meaning it can receive or transmit at different times. The first auxiliary data channel 17 is used for handshaking, sending and receiving handshake information. The first auxiliary data channel 17 is, for example, the AUX channel in a DP interface.

[0052] The first control unit may include a first field-programmable gate array 18 or a first microcontroller unit 19. The first field-programmable gate array FPGA1 (18) or the first microcontroller unit MCU1 (19) may be used to transmit handshake information.

[0053] The second millimeter-wave wireless communication unit includes a second millimeter-wave wireless transceiver 210, the second display signal interface 22 includes a second auxiliary data channel 25, and the projection receiver 20 also includes a second control unit connected to the second millimeter-wave wireless transceiver 210 and the second auxiliary data channel 25; the second millimeter-wave wireless transceiver 210 is used to transmit handshake information between the first millimeter-wave wireless transceiver 113 and the second millimeter-wave wireless transceiver 210, and the second control unit is used to transmit handshake information between the second auxiliary data channel 25 and the second millimeter-wave wireless transceiver 210.

[0054] The second millimeter-wave wireless transceiver 210, such as the ST60 A3, and the second auxiliary data channel 25, such as the AUX channel of the DP interface, are also included. The second millimeter-wave wireless transceiver 210 and the first millimeter-wave wireless transceiver 113 can communicate wirelessly and transmit handshake information to each other. The second control unit includes a second field-programmable gate array (FPGA) 2 (211), which is used to transmit handshake information between the second millimeter-wave wireless transceiver 210 and the second auxiliary data channel 25. The second control unit may also include an MCU 2 (212), which is used to transmit handshake information.

[0055] By adopting the above method, during the wireless screen projection process, handshake information is transmitted between the first millimeter-wave wireless transceiver 113 and the second millimeter-wave wireless transceiver 210 in half-duplex mode to realize the handshake between the first display signal interface 11 and the second display signal interface 22. This handshake does not rely on a wired connection and the handshake process has a fast response speed, which facilitates the further rapid realization of wireless screen projection.

[0056] In one embodiment, the first control unit may be FPGA1 or MCU1, and the second control unit may be FPGA2 or MCU2.

[0057] In one embodiment, the first display signal interface 11 includes a first auxiliary data channel 17; the projection transmitter 10 further includes a first infrared module connected to the first auxiliary data channel 17; the first infrared module is used to receive a first handshake signal from the first auxiliary data channel 17, send the first handshake signal to the second infrared module, receive a second handshake signal returned by the second infrared module, and forward the second handshake signal to the first auxiliary data channel 17.

[0058] The second display signal interface 22 includes a second auxiliary data channel 24, and the projection receiver 20 also includes a second infrared module connected to the second auxiliary data channel 24. The second infrared module is used to receive a first handshake signal, forward the first handshake signal to the second auxiliary data channel 24, receive a second handshake signal sent by the second auxiliary data channel 24, and send the second handshake signal to the first infrared module.

[0059] Reference Figure 3 In one specific implementation, the first display signal interface corresponds to the DP source end, and the second display signal interface corresponds to the DP receiver end. The auxiliary data transmission channels of both the DP source end and the DP receiver end are AUX. The millimeter-wave wireless transceivers of both the projection transmitter and the projection receiver end are ST60. Among them, the video data transmission channels include Lane0, Lane1, Lane2, and Lane3, which correspond to the millimeter-wave wireless transceivers ST60(0), ST60(1), ST60(2), and ST60(3), respectively. The DP source end and the DP receiver end can handshake through infrared module 1 and infrared module 2, or optionally through ST60A3. In addition, the DP source end can detect the connection status of the DP receiver end through the Hall sensor. If infrared module 1 and infrared module 2 are set, the Hall sensor and magnet need to be set together. However, if a pair of ST60A3 are set, the Hall sensor and magnet do not need to be set.

[0060] Using the above methods, handshakes can be completed using millimeter-wave wireless transceivers in half-duplex mode, or conveniently and quickly using infrared modules via AUX auxiliary channels. High-quality, high-resolution projection data can also be transmitted quickly through multiple data channels.

[0061] In one embodiment, the projection receiver further includes a magnet for emitting a magnetic field; the projection transmitter further includes a Hall sensor for sending a first connection status indication signal to the first display signal interface when a magnetic field is detected, the first connection status indication signal being used to instruct the first display signal interface to communicate; the Hall sensor is also used for sending a second connection status indication signal to the first display signal interface when no magnetic field is detected, the second connection status indication signal being used to instruct the first display signal interface to stop communicating.

[0062] In a specific implementation method, refer to Figure 3 When the DP receiver approaches the DP source, the Hall sensor at the DP source detects the magnetic field of the magnet at the DP receiver. The Hall sensor sends an HPD signal back to the DP source, which then confirms that a device is connected and begins communication. When the DP receiver moves away from the DP source, the Hall sensor no longer detects the magnetic field, and the polarity of the HPD signal transmitted by the DP source changes. The DP source then considers the DP receiver removed and no longer needs to transmit DP signals.

[0063] In one embodiment, if the wireless projection system performs a handshake through the first infrared module and the second infrared module, the first infrared module, the second infrared module, and the Hall sensor need to be used together. However, if the wireless projection system performs a handshake through a millimeter-wave wireless transceiver such as the ST60 A3, the Hall sensor can be used without it.

[0064] Using the above method, the screen projection transmitter 10 and the screen projection receiver can be connected conveniently, and the screen projection transmitter 10 and the screen projection receiver can be disconnected conveniently.

[0065] In one embodiment, the first millimeter-wave wireless communication unit further includes a millimeter-wave transmitter 110, and the first display signal interface 11 includes a first video data transmission channel 16 connected to the millimeter-wave transmitter 110; the first video data transmission channel 16 is used to send projection data after the first auxiliary data channel 17 completes the handshake. The second millimeter-wave wireless communication unit includes a millimeter-wave receiver 27, and the second display signal interface 22 includes a second video data transmission channel 25 connected to the millimeter-wave receiver 27; the second video data transmission channel 25 is also used to receive projection data after the second auxiliary data channel 24 completes the handshake.

[0066] In one embodiment, there are multiple first video data transmission channels 16 and multiple second video data transmission channels 25, with the number of first video data transmission channels 16 equal to the number of second video data transmission channels 25. The projected data is uncompressed video data. This increases the transmission speed of the projected data, and further, due to the high transmission speed, the projected data can be transmitted without compression, improving the image quality of the projected data and reducing latency.

[0067] The millimeter-wave transmitter 110 is, for example, the ST60 A2 Tx, and the millimeter-wave receiver 27 is, for example, the ST60 A2 Rx. The single video data transmission channel rate can reach 6Gbps, and four channels can transmit uncompressed 4K resolution projection video data.

[0068] In one embodiment, the number of millimeter-wave transmitters 110 and the number of millimeter-wave receivers 27 can be one, in which case 1080 resolution projection data can be transmitted. If the resolution of the projection data is increased, the number of millimeter-wave transmitters 110 and the number of millimeter-wave receivers 27 can be increased, for example to three or four, to transmit 4K resolution projection data.

[0069] In one embodiment, the projection receiver 20 further includes a power supply interface 29 and a wireless charging uplink unit 28 connected to the power supply interface 29; the power supply interface 29 is also used to supply power to the projection receiver 20; the projection transmitter 10 further includes a wireless charging downlink unit 112, a charging control unit connected to the wireless charging downlink unit 112, and a charging output interface connected to the charging control unit; the wireless charging downlink unit 112 is used to supply power to the projection transmitter 10. Furthermore, the charging control unit and the first signal conversion unit are integrated into the signal conversion circuit 15.

[0070] The wireless charging uplink unit 28 is used to wirelessly charge the projection transmitter 10. The circuit of the projection transmitter 10 requires the wireless charging of the wireless charging uplink unit 28 to operate normally. Therefore, the projection transmitter 10 includes a wireless charging downlink unit 112, which senses the magnetic field generated by the wireless charging coil of the wireless charging uplink unit 28 through the wireless charging coil, thereby generating current.

[0071] The charging control unit can be used to charge the projection device using the current generated by the wireless charging downlink unit. This method can simultaneously achieve wireless projection and wireless charging.

[0072] In one embodiment, the charging control unit and the first signal conversion unit are integrated in the signal conversion circuit 15, which is connected to the first display signal interface 11 and the projection signal transmission interface 13.

[0073] The signal conversion circuit 15 can be, for example, VL 102-Q4. Alternatively, other signal conversion circuits 15 capable of charging control and video data transmission can be used, and there are no limitations on this.

[0074] In one embodiment, the projection transmitter 10 further includes a first DC power management module 111. The input terminal of the first DC power management module 111 is connected to the wireless charging downlink unit 112, and the output terminal of the first DC power management module 111 is connected to the signal conversion circuit 15. The first DC power management module 111 is also used to supply power to the circuit components of the projection transmitter 10. The projection receiver 20 further includes a second DC power management module 213 connected to the power supply interface 29. The second DC power management module 213 is also used to supply power to the circuit components of the projection receiver 20. That is, both the projection transmitter 10 and the projection receiver 20 have DC power management modules. The DC power management module of the projection transmitter 10 can not only supply power to the circuit components of the projection transmitter 10, but also charge the projection device 30.

[0075] In one embodiment, the communication protocol type of the first display signal interface 11 and the second display signal interface 22 is DisplayPort; the communication protocol type of the projection data output interface 23 is HDMI or VGA; a second signal conversion unit 26 is also connected between the second display signal interface 22 and the projection data output interface 23, and the second signal conversion unit is used to convert the projection data of the DisplayPort protocol into projection data compatible with the HDMI protocol or VGA.

[0076] By adopting the above method, it can be more widely compatible with mainstream screen projection devices on the market, thus improving the compatibility of the wireless screen projection system.

[0077] In one embodiment, the projection signal transmission interface 13 includes a Type-C interface and a USB 2.0 interface, the first display signal interface 11 is a DisplayPort, and the first signal conversion unit is used to convert the signals output by the Type-C interface and the signals output by the USB 2.0 interface into DisplayPort compatible signals.

[0078] USB 2.0 can transmit signals from keyboards and mice, thereby expanding the types of peripherals supported and the types of devices that can be projected. It can also convert the signals output from the Type-C interface and the USB 2.0 interface into DisplayPort compatible signals, improving the applicability of the wireless projection system.

[0079] In one embodiment, the screen projection data output interface 23 is a DisplayPort interface. Therefore, the signal output by the DisplayPort of the screen projection receiver 20 needs to be restored and repaired by the second signal conversion unit 26 to avoid signal attenuation and thus improve the wireless screen projection effect.

[0080] Reference Figure 4 In a specific scenario, screen mirroring is performed from an iPad to a monitor. The iPad's mirroring signal is sent to its connected Type-C data interface and then to the VL102-Q4 signal conversion circuit. The VL102-Q4 signal conversion circuit converts the Type-C signal into a DP signal and sends it to DP1. A handshake is then established via DP1's AUX1, FPGA1, the ST60A3 transmitter at the mirroring end, the ST60A3 receiver at the mirroring end, FPGA2, and DP2's AUX2. A connection is also established via HPD1, FPGA1, the ST60A3 transmitter at the mirroring end, the ST60A3 receiver at the mirroring end, FPGA2, and HPD2. This allows the mirroring transmitter to detect the connection status of the mirroring receiver. Once the handshake is complete and a connection is established, the connection is established via Lane0 at the mirroring transmitter, ST60A2 TX, ST60A2 RX, and Lane0 at the mirroring receiver. The process involves transmitting DP protocol projection data between the projection transmitter and receiver, converting the DP protocol projection data to HDMI (or VGA) protocol projection data, and then sending the HDMI (or VGA) protocol projection data to the monitor for display. This method achieves high-response speed and high-quality wireless projection.

[0081] Furthermore, the Type-C power interface of the screen mirroring receiver is connected to a power source, supplying power to the wireless charging TX. The coil of the wireless charging TX emits a magnetic field, which is sensed by the coil of the wireless charging RX on the screen mirroring transmitter, generating current. This voltage is further regulated and supplied to the Type-C data interface via VL102-Q4, further charging the iPad. The first DC power management module supplies power to the circuit components of the screen mirroring transmitter and can also adjust the voltage to adapt to fast charging requirements. The second DC power management module supplies power to the circuit components of the screen mirroring receiver. Thus, in addition to meeting the power requirements for wireless screen mirroring, it can also wirelessly charge the iPad, improving the ease of use of the wireless screen mirroring system.

Claims

1. A wireless screen projection system, characterized in that, The wireless projection system includes: The screen projection transmitter includes a screen projection signal transmission interface, a first signal conversion unit connected to the screen projection signal transmission interface, a first display signal interface connected to the first signal conversion unit, and a first millimeter-wave wireless communication unit connected to the first display signal interface; the first signal conversion unit is used to convert the screen projection signal into screen projection data compatible with the first display signal interface. The screen projection receiver includes a second millimeter-wave wireless communication unit, a second display signal interface connected to the second millimeter-wave wireless communication unit, a second signal conversion unit connected to the second display signal interface, and a screen projection data output interface connected to the second signal conversion unit. The communication protocol type of the second display signal interface is the same as that of the first display signal interface. The second millimeter-wave wireless communication unit is used to communicate wirelessly with the first millimeter-wave wireless communication unit and receive the screen projection data sent by the first millimeter-wave wireless communication unit. The second signal conversion unit is used to convert the signal output by the second display signal interface into screen projection data compatible with the screen projection data output interface.

2. The wireless screen projection system according to claim 1, characterized in that, The first millimeter-wave wireless communication unit includes a first millimeter-wave wireless transceiver, the first display signal interface includes a first auxiliary data channel, and the projection transmitter further includes a first control unit connected to the first millimeter-wave wireless transceiver and the first auxiliary data channel; the first control unit is used to transmit handshake information between the first auxiliary data channel and the first millimeter-wave wireless transceiver, and the first millimeter-wave wireless transceiver is used to transmit the handshake information with the second millimeter-wave wireless communication unit; The second millimeter-wave wireless communication unit includes a second millimeter-wave wireless transceiver, the second display signal interface includes a second auxiliary data channel, and the projection receiver further includes a second control unit connected to the second millimeter-wave wireless transceiver and the second auxiliary data channel; the second millimeter-wave wireless transceiver is used to transmit the handshake information between the first millimeter-wave wireless transceiver and the second millimeter-wave wireless transceiver, and the second control unit is used to transmit the handshake information between the second auxiliary data channel and the second millimeter-wave wireless transceiver.

3. The wireless screen projection system according to claim 1, characterized in that, The first display signal interface includes a first auxiliary data channel; the projection transmitter further includes a first infrared module connected to the first auxiliary data channel; the first infrared module is used to receive a first handshake signal from the first auxiliary data channel, send the first handshake signal to the second infrared module, receive a second handshake signal returned by the second infrared module, and forward the second handshake signal to the first auxiliary data channel; The second display signal interface includes a second auxiliary data channel, and the projection receiver further includes a second infrared module connected to the second auxiliary data channel. The second infrared module is used to receive the first handshake signal, forward the first handshake signal to the second auxiliary data channel, receive the second handshake signal sent by the second auxiliary data channel, and send the second handshake signal to the first infrared module.

4. The wireless projection system according to claim 3, characterized in that, The projection receiver also includes a magnet, which is used to emit a magnetic field; The projection transmitter also includes a Hall sensor, which is used to send a first connection status indication signal to the first display signal interface when the magnetic field is detected. The first connection status indication signal is used to instruct the first display signal interface to communicate. The Hall sensor is also used to send a second connection status indication signal to the first display signal interface when the magnetic field is not detected. The second connection status indication signal is used to instruct the first display signal interface to stop communicating.

5. The wireless projection system according to any one of claims 2-4, characterized in that, The first millimeter-wave wireless communication unit further includes a millimeter-wave transmitter, and the first display signal interface includes a first video data transmission channel connected to the millimeter-wave transmitter; the first video data transmission channel is used to send the projection data after the first auxiliary data channel completes the handshake. The second millimeter-wave wireless communication unit further includes a millimeter-wave receiver, and the second display signal interface includes a second video data transmission channel connected to the millimeter-wave receiver; The second video data transmission channel is also used to receive the projection data after the handshake is completed in the second auxiliary data channel.

6. The wireless projection system according to claim 1, characterized in that, The screen projection receiver also includes: a power supply interface and a wireless charging uplink unit connected to the power supply interface; the power supply interface is also used to supply power to the screen projection receiver. The projection transmitter further includes: a wireless charging downlink unit, a charging control unit connected to the wireless charging downlink unit, and a charging output interface connected to the charging control unit; the wireless charging downlink unit is used to supply power to the projection transmitter.

7. The wireless projection system according to claim 6, characterized in that, The charging control unit and the first signal conversion unit are integrated in a signal conversion circuit, which is connected to the first display signal interface and the projection signal transmission interface.

8. The wireless projection system according to claim 7, characterized in that, The projection transmitter also includes a first DC power management module. The input of the first DC power management module is connected to the wireless charging downlink unit, and the output of the first DC power management module is connected to the signal conversion circuit. The first DC power management module is also used to supply power to the circuit components of the projection transmitter. The screen projection receiver also includes a second DC power management module connected to the power supply interface. The second DC power management module is also used to supply power to the circuit components of the screen projection receiver.

9. The wireless projection system according to claim 1, characterized in that, The communication protocol type of both the first display signal interface and the second display signal interface is DisplayPort; The communication protocol type of the screen projection data output interface is HDMI or VGA, and the second signal conversion unit is used to convert the screen projection data of the DisplayPort protocol into screen projection data compatible with the HDMI protocol or VGA protocol.

10. The wireless screen projection system according to claim 1, characterized in that, The projection signal transmission interface includes a Type-C interface and a USB 2.0 interface. The first display signal interface is DisplayPort. The first signal conversion unit is used to convert the signals output from the Type-C interface and the USB 2.0 interface into DisplayPort-compatible signals.

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