Screen projector

Abstract

The utility model provides a screen projector, relates to the technical field of screen projection, and can ensure that the other unit is not affected when one circuit board breaks down, so that the maintenance cost can be reduced. The screen projector comprises a screen projection processing unit and a wireless transmission unit, the screen projection processing unit is arranged on a first circuit board, and the wireless transmission unit is arranged on a second circuit board; the first circuit board comprises a first connecting assembly, the second circuit board comprises a second connecting assembly, and the screen projection processing unit and the wireless transmission unit are connected through the first connecting assembly and the second connecting assembly. The screen projection processing unit is used for acquiring multimedia data, encoding the multimedia data and sending the encoded multimedia data to the wireless transmission unit; and the wireless transmission unit is used for sending the encoded multimedia data to a screen projection receiving end through a wireless network.

Description

Technical Field

[0001] This application relates to the technical field of screen mirroring, and particularly to a screen mirroring device. Background Art

[0002] The wireless screen mirroring device has a screen mirroring function. By connecting with an electronic device, the wireless screen mirroring device can transmit multimedia resources such as pictures and videos displayed on the electronic device (such as a mobile phone or a tablet, etc.) to the screen mirroring receiving end side (such as a TV or a monitor) for display through the wireless transmission module in the wireless screen mirroring device.

[0003] Currently, a wireless screen mirroring device usually includes a data processing unit and a transmission unit, and the data processing unit and the transmission unit are arranged on a circuit board. In this way, if an abnormality occurs in the circuit board, both the data processing unit and the transmission unit cannot be used. Utility Model Content

[0004] This application provides a screen mirroring device, which is used to solve the problem that when an abnormality occurs in the circuit board, both the data processing unit and the transmission unit cannot be used.

[0005] To achieve the above object, this application adopts the following technical solutions:

[0006] In a first aspect, this application provides a screen mirroring device, which includes: a screen mirroring processing unit and a wireless transmission unit. The screen mirroring processing unit is arranged on a first circuit board, and the wireless transmission unit is arranged on a second circuit board; the first circuit board includes a first connection component, and the second circuit board includes a second connection component. The screen mirroring processing unit and the wireless transmission unit are connected through the first connection component and the second connection component. The screen mirroring processing unit is configured to obtain multimedia data, encode the multimedia data, and send the encoded multimedia data to the wireless transmission unit; the wireless transmission unit is configured to send the encoded multimedia data to the screen mirroring receiving end through a wireless network.

[0007] In a possible design, the screen mirroring processing unit includes: a data acquisition module and a data processing module, and the data acquisition module and the data processing module are connected; the data acquisition module is configured to receive multimedia data and send the multimedia data in a second format to the data processing module; the data processing module is configured to compress the multimedia data and send the compressed multimedia data to the wireless transmission unit.

[0008] In a possible design, the screen mirroring processing unit further includes: a data conversion module, which is respectively connected to the data acquisition module and the data processing module; a data acquisition module, configured to receive multimedia data in a first format and send the multimedia data in the first format to the data conversion module; a data conversion module, configured to convert the multimedia data in the first format into multimedia data in a second format and send the multimedia data in the second format to the data processing module; the second format is a data format supported by the data processing module.

[0009] In a possible design, the first connection component is a first connector, the second connection component is a second connector, and the first connector and the second connector are respectively a male connector and a female connector. The screen mirroring processing unit is configured to send the encoded multimedia data to the wireless transmission unit through the first connector and the second connector.

[0010] In a possible design, the first connector and the second connector are any one of the following: a pogopin connector, a board-to-board connector, and a socket connector.

[0011] In a possible design, the first connection component is a first connection interface, and the second connection component is a second connection interface; the first connection interface is soldered on the first circuit board, and the second connection interface is soldered on the second circuit board.

[0012] In a possible design, the first connection interface and the second connection interface are any one of the following: a Universal Serial Bus (USB) interface, a High Definition Multimedia Interface (HDMI), and a Type-C interface.

[0013] In a possible design, the screen mirroring device further includes: a screen mirroring button. The screen mirroring button is configured to trigger the transmission of the encoded multimedia data to the screen mirroring receiving end through the wireless transmission unit.

[0014] In a possible design, the screen mirroring button is connected to the data processing module.

[0015] Based on the above technical solution, the screen mirroring processing unit is disposed on the first circuit board, and the wireless transmission unit is disposed on the second circuit board; the first circuit board includes a first connection component, and the second circuit board includes a second connection component. The screen mirroring processing unit and the wireless transmission unit are connected through the first connection component and the second connection component. The screen mirroring processing unit is configured to obtain multimedia data, encode the multimedia data, and send the encoded multimedia data to the wireless transmission unit. The wireless transmission unit is configured to send the encoded multimedia data to the screen mirroring receiving end through a wireless network. In this way, by deploying the screen mirroring processing unit and the wireless transmission unit on different circuit boards respectively, it can be ensured that when one circuit board fails, the other unit will not be affected, thereby reducing the maintenance cost. Description of the Drawings

[0016] Figure 1 It is a system architecture diagram of a screen mirroring system provided by an embodiment of the present application;

[0017] Figure 2 It is a schematic structural diagram of a screen mirroring device provided by an embodiment of the present application;

[0018] Figure 3 It is a schematic structural diagram of another screen mirroring device provided by an embodiment of the present application;

[0019] Figure 4 It is a schematic structural diagram of another screen mirroring device provided by an embodiment of the present application. Detailed Embodiments

[0020] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0021] The terms "first" and "second" in the specification and claims of the present application are used to distinguish different objects, rather than to describe a specific order of the objects.

[0022] In addition, the terms "including" and "having" and any variations thereof mentioned in the description of the present application are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or modules is not limited to the listed steps or modules, but optionally further includes other steps or modules not listed, or optionally further includes other steps or modules inherent to these processes, methods, products, or devices.

[0023] In addition, in the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or explanations. Any embodiment or design described as "exemplary" or "for example" in the present application should not be construed as being more preferred or advantageous than other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present concepts in a specific manner.

[0024] Currently, both the data processing unit and the transmission unit in the wireless screen mirroring device are provided on a circuit board. In this way, if an abnormality occurs in the circuit board, it will cause both the data processing unit and the transmission unit to be unusable. Moreover, the fact that the data processing unit and the transmission unit are provided on a single circuit board results in a relatively high maintenance cost.

[0025] To solve the above technical problems, an embodiment of the present application provides a screen mirroring device. The screen mirroring device includes: a screen mirroring processing unit and a wireless transmission unit. The screen mirroring processing unit is provided on a first circuit board, and the wireless transmission unit is provided on a second circuit board; the screen mirroring processing unit and the wireless transmission unit are connected. The screen mirroring processing unit is configured to obtain multimedia data, encode the multimedia data, and send the encoded multimedia data to the wireless transmission unit. The wireless transmission unit is configured to send the encoded multimedia data to a screen mirroring receiving end through a wireless network. In this way, by deploying the screen mirroring processing unit and the wireless transmission unit on different circuit boards respectively, it can be ensured that when one circuit board fails, the other unit will not be affected, thereby reducing the maintenance cost.

[0026] The implementation environment of the embodiments of the present application is introduced below.

[0027] As Figure 1 shown, a screen mirroring system provided by an embodiment of the present application includes: a screen mirroring device 101, a source device 102, and a screen mirroring receiving end 103. Among them, the screen mirroring device 101 is connected to the source device 102, and the screen mirroring device 101 is wirelessly connected to the screen mirroring receiving end 103.

[0028] The screen mirroring device 101 is configured to send the data to be screen mirrored in the source device 102 to the screen mirroring receiving end 103 through a wireless network, so that the screen mirroring receiving end 103 can display the data to be screen mirrored. Moreover, the screen mirroring device 101 can also receive user operations to trigger the start or stop of the screen mirroring operation. The screen mirroring device 101 can also process the data to be screen mirrored (such as compression, format conversion, resolution adjustment, etc.).

[0029] In a possible design, when the screen mirroring device 101 is connected to the source device 102 (such as the screen mirroring device 101 being inserted into the source device), the source device 102 can send the data to be screen mirrored to the screen mirroring device 101.

[0030] In another possible design, the screen mirroring device 101 includes a screen mirroring button. After the screen mirroring device 101 is connected to the source device 102, in response to the user's operation on the screen mirroring button, the source device 102 sends the data to be screen mirrored to the screen mirroring device 101.

[0031] The source device 102 is used to provide the data to be screen mirrored. For example, the data to be screen mirrored can be the data currently displayed in the source device 102. The source device 102 can send the data to be screen mirrored to the screen mirroring device 101.

[0032] The screen mirroring receiver 103 can receive the data to be screen mirrored sent by the screen mirroring device 101 and display the data to be screen mirrored.

[0033] In one possible design, the screen mirroring receiver 103 is provided with a wireless receiving unit paired with the screen mirroring device 101. The wireless receiving unit is used to receive the data to be screen mirrored sent by the wireless transmission unit, decode the data to be screen mirrored, and then display the decoded data to be screen mirrored on the screen mirroring receiver 103.

[0034] In another possible design, the screen mirroring receiver 103 is connected to the wireless receiving unit paired with the screen mirroring device 101. For example, the screen mirroring receiver 103 is connected to the wireless receiving unit through a USB interface or an HDMI interface. The wireless receiving unit is used to receive the data to be screen mirrored sent by the wireless transmission unit, decode the data to be screen mirrored, and then send the decoded data to be screen mirrored to the screen mirroring receiver 103 and display it on the screen mirroring receiver 103.

[0035] It should be noted that both the source device 102 and the screen mirroring receiver 103 can be electronic devices, such as a mobile phone (MobilePhone) or a tablet computer. Alternatively, the screen mirroring receiver 103 can be a display screen.

[0036] The screen mirroring device 101 will be specifically described below with reference to the accompanying drawings of the specification.

[0037] As Figure 2 shown, a screen mirroring device provided by an embodiment of the present application is shown. The screen mirroring device 101 may include: a screen mirroring processing unit 201 and a wireless transmission unit 202. The screen mirroring processing unit 201 is disposed on a first circuit board, and the wireless transmission unit 202 is disposed on a second circuit board.

[0038] It should be noted that the types of the first circuit board and the second circuit board in the embodiments of the present application are not limited. The circuit board can also be referred to as a printed circuit board (PCB). For example, the first circuit board can be a single-sided board, a double-sided board, a multi-layer board, etc. Also, for example, the second circuit board can be a rigid circuit board, a flexible circuit board, etc. Among them, the first circuit board and the second circuit board can be the same, or the first circuit board and the second circuit board can be different. The embodiments of the present application do not limit this.

[0039] In the embodiments of the present application, the first circuit board includes a first connection component, and the second circuit board includes a second connection component. The screen projection processing unit 201 and the wireless transmission unit 202 are connected through the first connection component and the second connection component.

[0040] In a possible design, the first connection component is a first connection interface, and the second connection component is a second connection interface. The first connection interface is soldered on the first circuit board, and the second connection interface is soldered on the second circuit board.

[0041] Exemplarily, the first connection interface and the second connection interface are any one of the following: USB interface, HDMI, Type-C interface. For example, taking the first connection interface and the second connection interface as Type-C female sockets as an example, the first connection interface and the second connection interface can be connected using a double-ended Type-C male head. The double-ended Type-C male head can be connected through a transmission cable, that is, a Type-C male head is provided on each side of the transmission cable.

[0042] Exemplarily, the transmission cable can be a coaxial cable, a twisted pair, a strip line, a wire, etc.

[0043] In a possible design, the screen projection processing unit 201 and the wireless transmission unit 202 can be connected through a connector. The first connection component is a first connector, and the second connection component is a second connector. The first connector and the second connector are a male connector and a female connector respectively. Among them, the screen projection processing unit 201 is configured to send the encoded multimedia data to the wireless transmission unit 202 through the first connector and the second connector.

[0044] Exemplarily, the first connector can be a male connector, and the second connector is a female connector. Or, the first connector can be a female connector, and the second connector can be a male connector. For example, the first circuit board can be connected to the second circuit board through the pins and sockets of the connector to complete the connection between the screen projection processing unit 201 and the wireless transmission unit 202.

[0045] It should be noted that the type of the connector is not limited in the embodiments of the present application. For example, the connector can be a board-to-board connector, a socket connector, a surface-mount connector, a pogopin connector, etc.

[0046] In the embodiments of the present application, the screen mirroring processing unit 201 is configured to obtain multimedia data, encode the multimedia data, and send the encoded multimedia data to the wireless transmission unit 202. The wireless transmission unit 202 is configured to send the encoded multimedia data to the screen mirroring receiving end 103 through a wireless network.

[0047] Exemplarily, the wireless transmission unit 202 can be a WiFi module, a Bluetooth module, etc.

[0048] It should be noted that the multimedia data may include audio and video signals. Encoding the multimedia data may include: preprocessing the data (such as format conversion, frame sampling, cropping and scaling, etc.), compression, post-processing (such as filtering), etc. The embodiments of the present application do not limit this.

[0049] Based on the above technical solution, the screen mirroring processing unit is disposed on the first circuit board, and the wireless transmission unit is disposed on the second circuit board; the screen mirroring processing unit and the wireless transmission unit are connected. The screen mirroring processing unit is configured to obtain multimedia data, encode the multimedia data, and send the encoded multimedia data to the wireless transmission unit. The wireless transmission unit is configured to send the encoded multimedia data to the screen mirroring receiving end through a wireless network. In this way, by separately deploying the screen mirroring processing unit and the wireless transmission unit on different circuit boards, it can be ensured that when one circuit board fails, the other unit will not be affected, thereby reducing the maintenance cost.

[0050] In some embodiments, the screen mirroring processing unit includes: a data acquisition module, a data conversion module, and a data processing module. As Figure 3 shown, the data conversion module 302 is respectively connected to the data acquisition module 301 and the data processing module 303.

[0051] The data acquisition module 301 is configured to receive multimedia data in a first format and send the multimedia data in the first format to the data conversion module 302. The data conversion module is configured to convert the multimedia data in the first format into multimedia data in a second format and send the multimedia data in the second format to the data processing module; the second format is a data format supported by the data processing module 303.

[0052] Exemplarily, the data acquisition module 301 can be a hardware interface, such as a USB interface, a TYPEC interface, etc. The data conversion module 302 can be an LT7911D chip.

[0053] In a possible design, the data acquisition module 301 may receive multimedia data in a first format from the source device 101.

[0054] In a possible design, the screen mirroring processing unit 201 further includes a storage module 304, which can be used to store multimedia data. The storage module 304 is connected to the data processing module 303. The storage module can send multimedia data to the screen mirroring processing unit 201.

[0055] Exemplarily, the storage module 304 can be an embedded memory (Embedded Multi Media Card, eMMC), a Flash memory, etc. The storage module 304 can be connected to the data processing module 303 through a Secure Digital Input and Output (SDIO) interface.

[0056] It should be noted that the embodiments of the present application do not limit the first format and the second format. For example, the first format can be an Embedded DisplayPort (eDP) format, and the second format is a Mobile Industry Processor Interface (MIPI) format. Another example is that the first format or the second format can be a Video Graphics Array (VGA), a Digital Visual Interface (DVI), an analog video signal format, a Miracast format, etc., respectively.

[0057] The data processing module 303 is used to compress the multimedia data in the second format and send the compressed multimedia data in the second format to the wireless transmission unit.

[0058] Exemplarily, the data processing module 303 can be a processor chip, such as an RV1126 chip, a Field Programmable Gate Array (FPGA), an ARM, an MPSOC, etc.

[0059] Optionally, the data processing module 303 can also be used to preprocess the multimedia data in the second format.

[0060] Exemplarily, the data processing module 303 can adjust the resolution of the multimedia data, crop the multimedia data, etc.

[0061] It can be understood that the data conversion module is respectively connected to the data acquisition module and the data processing module, so that after the data acquisition module obtains data, it first sends the multimedia data to the data conversion module, and only after the format of the multimedia data is converted, it will be transmitted to the data processing module. In this way, not only can the efficiency of data transmission be improved, but also it can be ensured that the data formats received by the data processing module are all supported data formats.

[0062] In some embodiments, the screen mirroring processing unit includes: a data acquisition module and a data processing module. The data acquisition module and the data processing module are connected. The data acquisition module is further configured to receive multimedia data and send the multimedia data to the data processing module. The data processing module is configured to compress the multimedia data and send the compressed multimedia data to the wireless transmission unit.

[0063] That is to say, the data acquisition module is directly connected to the data processing module. The format of the data obtained by the data acquisition module is a data format supported by the data processing module. Therefore, the data acquisition module can send the data without format conversion to the data processing module to simplify the data transmission process.

[0064] In some embodiments, the screen mirroring device further includes: a screen mirroring button. The screen mirroring button is used to trigger the transmission of the encoded multimedia data to the screen mirroring receiving end through the wireless transmission unit. Among them, the screen mirroring button can be set on the screen mirroring processing unit, or the screen mirroring button can be set on the wireless transmission unit.

[0065] Exemplarily, as Figure 4 shown, the screen mirroring button 401 is connected to the data processing module 303. The screen mirroring button 401 can receive the operation of the user and trigger the data processing module 303 to generate an operation instruction. After that, the data processing module 303 can send the operation instruction to the wireless transmission unit through the first connector and the second connector.

[0066] For example, when the screen mirroring device 101 is not in the screen mirroring state, in response to the triggering operation of the screen mirroring button 401, the screen mirroring processing unit can generate a start screen mirroring instruction. Or, when the screen mirroring device 101 is in the screen mirroring state, in response to the triggering operation of the screen mirroring button 401, the screen mirroring processing unit can generate a stop screen mirroring instruction.

[0067] It should be noted that the type of the screen mirroring button in the embodiments of the present application is not limited. For example, the screen mirroring button can be a mechanical button, such as when the user presses the screen mirroring button to trigger the generation of a screen mirroring / ending screen mirroring instruction. Or, the screen mirroring button can be a non-contact button (such as an infrared induction button, a capacitive button, etc.), and the user touches (or approaches) the screen mirroring button to trigger the generation of a screen mirroring / ending screen mirroring instruction.

[0068] It can be understood that the screen mirroring processing unit includes a screen mirroring button, enabling the user to control the screen mirroring device through the screen mirroring button, which improves the convenience of user operation.

[0069] Optionally, the screen mirroring processing unit 201 may further include a memory module 402, and the memory module 402 is used to store the cached data in the screen mirroring device.

[0070] Exemplarily, when the screen mirroring device is running, the memory module 402 can cache the system data, data to be screen mirrored, etc. of the screen mirroring device.

[0071] It can be understood that the memory module 402 stores the cached data in the screen mirroring device, and the screen mirroring device reads the cached data at a relatively fast speed. Therefore, the efficiency of transmitting the data to be screen mirrored can be improved, and thus the screen mirroring effect can be enhanced.

[0072] In some embodiments, both the screen mirroring device 101 and the screen mirroring receiving end 103 support wireless screen mirroring protocols.

[0073] Exemplarily, the wireless screen mirroring protocol can be Miracast protocol, AirPlay protocol, DLNA protocol, WDHI protocol, etc.

[0074] In some embodiments, the screen mirroring processing unit 201 and the wireless transmission unit are two units in the screen mirroring device 101 that can be combined or separated.

[0075] Among them, the screen mirroring processing unit 201 and the wireless transmission unit 202 are detachably connected to adjust the state between the screen mirroring processing unit 201 and the wireless transmission unit 202. The state between the screen mirroring processing unit 201 and the wireless transmission unit 202 includes: connected state and separated state. When the state between the screen mirroring processing unit 201 and the wireless transmission unit 202 is in the connected state, the connection between the screen mirroring processing unit 201 and the wireless transmission unit 202 is fixed by a preset fixing method.

[0076] Exemplarily, when the screen mirroring processing unit 201 and the wireless transmission unit 202 are in the connected state, the screen mirroring processing unit 201 and the wireless transmission unit 202 can be connected through a board-to-board connector or a transmission cable. When the screen mirroring processing unit 201 and the wireless transmission unit 202 are in the separated state, the screen mirroring processing unit 201 and the wireless transmission unit 202 are not connected through a board-to-board connector, that is, the first connector and the second connector are not connected.

[0077] It should be noted that the user can change the state between the screen mirroring processing unit 201 and the wireless transmission unit 202 through the operation method of plugging and unplugging.

[0078] It can be understood that the states between the screen mirroring processing unit and the wireless transmission unit are divided into a connected state and a separated state, enabling the user to choose to use screen mirroring devices with different functions, providing the user with more choices. Moreover, the connection between the screen mirroring processing unit and the wireless transmission unit is fixed in a preset fixed manner, making the connection between the screen mirroring processing unit and the wireless transmission unit more secure.

[0079] In a possible implementation manner, magnetic attracting components are respectively deployed on the screen mirroring processing unit 201 and the wireless transmission unit 202. The preset fixed manner includes: fixing the connection between the screen mirroring processing unit 201 and the wireless transmission unit 202 through the magnetic attracting components.

[0080] Exemplarily, the magnetic attracting component can be a magnet. Magnets can be respectively deployed on the connection sides of the screen mirroring processing unit 201 and the wireless transmission unit 202. When the screen mirroring processing unit 201 and the wireless transmission unit 202 are in the connected state, the screen mirroring processing unit 201 and the wireless transmission unit 202 can increase the firmness of the connection through the magnets.

[0081] In another possible implementation manner, the screen mirroring processing unit 201 and the wireless transmission unit 202 are respectively provided with a protruding portion and a recessed portion. The preset fixed manner includes: fixing the connection between the screen mirroring processing unit and the wireless transmission unit by embedding the protruding portion into the recessed portion.

[0082] Although the present application has been described in combination with specific features and their embodiments, it is obvious that various modifications and combinations can be made without departing from the spirit and scope of the present application. Accordingly, this specification and the drawings are merely exemplary illustrations of the present application defined by the appended claims, and are considered to cover any and all modifications, variations, combinations, or equivalents within the scope of the present application. Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application is also intended to include these changes and modifications.

[0083] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any change or replacement within the technical scope disclosed in the present application should be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A screen projector, characterized in that: The screen projection device comprises: a screen projection processing unit and a wireless transmission unit, wherein the screen projection processing unit is arranged on a first circuit board, and the wireless transmission unit is arranged on a second circuit board; the first circuit board comprises a first connecting component, the second circuit board comprises a second connecting component, and the screen projection processing unit and the wireless transmission unit are connected via the first connecting component and the second connecting component; The screen projection processing unit is used to obtain multimedia data, encode the multimedia data, and send the encoded multimedia data to the wireless transmission unit; The wireless transmission unit is used to send the encoded multimedia data to the screen projection receiving end via a wireless network.

2. The screen projector according to claim 1, characterized in that: The screen projection processing unit includes: a data acquisition module and a data processing module, and the data acquisition module and the data processing module are connected; The data acquisition module is used to receive the multimedia data and send the multimedia data to the data processing module; The data processing module is used to compress the multimedia data and send the compressed multimedia data to the wireless transmission unit.

3. The screen projector according to claim 2, characterized in that: The screen projection processing unit further includes: a data conversion module, which is connected to the data acquisition module and the data processing module respectively; The data acquisition module is used to receive the multimedia data in the first format and send the multimedia data in the first format to the data conversion module; The data conversion module is used to convert the multimedia data in the first format into the multimedia data in a second format, and send the multimedia data in the second format to the data processing module; the second format is a data format supported by the data processing module.

4. The screen projector according to any one of claims 1 to 3, characterized in that: The first connection component is a first connector, and the second connection component is a second connector; the first connector and the second connector are respectively a male connector and a female connector; The screen projection processing unit is used to send the encoded multimedia data to the wireless transmission unit through the first connector and the second connector.

5. The screen projector according to claim 4, characterized in that: The first connector and the second connector are any one of the following: a pogo pin connector, a board-to-board connector, and a socket connector.

6. The screen projector according to any one of claims 1 to 3, characterized in that: The first connection component is a first connection interface, and the second connection component is a second connection interface; The first connection interface is welded on the first circuit board, and the second connection interface is welded on the second circuit board.

7. The screen projector according to claim 6, characterized in that: The first connection interface and the second connection interface are any one of the following: a universal serial bus USB interface, a high-definition multimedia interface HDMI, and a Type-C interface.

8. The screen projector according to claim 2 or 3, characterized in that: The screen projection device further includes: a screen projection button; The screen projection button is used to trigger the transmission of the encoded multimedia data to the screen projection receiving end through the wireless transmission unit.

9. The screen projector according to claim 8, characterized in that: The screen projection button is connected to the data processing module.

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