Multi-interface connection circuit and multi-interface connector

Abstract

The application provides a multi-interface connection circuit and a multi-interface connector, which comprise a first switch unit, a second switch unit, a first power supply unit, a protocol unit, a hub unit, a video processing unit, a first interface, a second interface, a third interface unit and a fourth interface unit. The first power supply unit is electrically connected with the first switch unit, the second switch unit, the protocol unit, the hub unit, the video processing unit and the third interface unit respectively; the protocol unit is electrically connected with the first switch unit, the second switch unit, the video processing unit, the first interface and the second interface respectively; the first interface is electrically connected with the first switch unit, the hub unit and the video processing unit respectively; the second interface is electrically connected with the second switch unit, the hub unit and the video processing unit respectively; the third interface unit is electrically connected with the hub unit; and the fourth interface unit is electrically connected with the video processing unit. The multi-interface connection circuit greatly enriches the function of the second interface.

Description

Technical Field

[0001] This application belongs to the field of multi-interface connectors, and particularly relates to a multi-interface connection circuit and a multi-interface connector. Background Technology

[0002] Today, the USB-C (Universal Serial Bus Type-C) interface has become the standard interface for smart devices such as mobile phones and computers. Therefore, third-party connectors for mobile phones and computers are also commonly equipped with USB-C interfaces. These connectors enable charging of mobile phones or computers, as well as the transmission of data and video signals. To meet the charging needs of these interface devices, various multi-interface connectors have emerged in the market. Existing multi-interface connectors mainly include a first interface, a second interface, a third interface unit, a fourth interface unit, a first switch unit, a second switch unit, a hub unit, a video processing unit, a first power supply unit, and a protocol unit. The first interface is used to connect to a first device (such as a mobile phone / computer), and the second interface is used to connect to a second device (such as an adapter). This design means that the second device connected to the second interface can only be selected as a device for powering the system, and cannot be expanded with other functions, making the second interface relatively simple in function. Utility Model Content

[0003] This application provides a multi-interface connection circuit and a multi-interface connector, which can solve the problem that the second interface of existing multi-interface connectors has a relatively simple function.

[0004] In a first aspect, embodiments of this application provide a multi-interface connection circuit, including a first switch unit, a second switch unit, a first power supply unit, a protocol unit, a hub unit, a video processing unit, a first interface, a second interface, a third interface unit, and a fourth interface unit;

[0005] The first power supply unit is electrically connected to the first switch unit, the second switch unit, the protocol unit, the hub unit, the video processing unit, and the third interface unit. The protocol unit is electrically connected to the first switch unit, the second switch unit, the video processing unit, the first interface, and the second interface. The first interface is electrically connected to the first switch unit, the hub unit, and the video processing unit. The second interface is electrically connected to the second switch unit, the hub unit, and the video processing unit. The third interface unit is electrically connected to the hub unit. The fourth interface unit is electrically connected to the video processing unit. The first interface is used for electrical connection to a first device. The second interface is used for electrical connection to a second device. The third interface unit is used for electrical connection to a third device. The fourth interface unit is used for electrical connection to a fourth device.

[0006] In one possible implementation of the first aspect, the first switching unit includes a first switch, a first end of the first switch being electrically connected to the first power supply unit, a second end of the first switch being electrically connected to the first interface, and a control end of the first switch being electrically connected to the protocol unit.

[0007] In one possible implementation of the first aspect, the second switching unit includes a second switch, a first end of the second switch being electrically connected to the first power supply unit, a second end of the second switch being electrically connected to the second interface, and a control end of the second switch being electrically connected to the protocol unit.

[0008] In one possible implementation of the first aspect, the protocol unit includes a controller chip, which is electrically connected to the first power supply unit, the first switch unit, the second switch unit, the video processing unit, the first interface, and the second interface, respectively.

[0009] In one possible implementation of the first aspect, the hub unit includes a hub chip that is electrically connected to the first power supply unit, the first interface, the second interface, and the third interface unit, respectively.

[0010] In one possible implementation of the first aspect, the video processing unit includes a video processing chip, which is electrically connected to the first power supply unit, the protocol unit, the first interface, the second interface, and the fourth interface unit, respectively.

[0011] In one possible implementation of the first aspect, both the first interface and the second interface are USB-C interfaces, the third interface unit includes multiple USB interfaces, and the fourth interface unit includes multiple video interfaces.

[0012] In one possible implementation of the first aspect, the multi-interface connection circuit further includes a second power supply unit and a fifth interface, wherein the second power supply unit is electrically connected to the first switch unit, the second switch unit, the first power supply unit, the protocol unit, and the fifth interface, respectively, and the fifth interface is used for electrical connection with the power supply equipment.

[0013] In one possible implementation of the first aspect, the fifth interface is a DC (Direct Current) interface.

[0014] Secondly, embodiments of this application provide a multi-interface connector, including the multi-interface connection circuit described in any one of the first aspects.

[0015] The beneficial effects of the embodiments in this application compared with the prior art are:

[0016] The multi-interface connection circuit provided in this application includes a first switch unit, a second switch unit, a first power supply unit, a protocol unit, a hub unit, a video processing unit, a first interface, a second interface, a third interface unit, and a fourth interface unit. In practical use, the first interface is used for electrical connection to a first device, the second interface is used for electrical connection to a second device, the third interface unit is used for electrical connection to a third device, and the fourth interface unit is used for electrical connection to a fourth device. The second interface is also electrically connected to the hub unit, the video processing unit, and the protocol unit, respectively, and can receive signals output by the hub unit, signals output by the video processing unit, and configuration signals output by the protocol unit, ensuring bidirectional transmission between the second interface and the second device. Therefore, the multi-interface connection circuit provided in this application adds one signal transmission path from the hub unit to the second interface and one signal transmission path from the video processing unit to the second interface, and configures the second interface, effectively expanding the application scope of the second interface. This means that the second device connected to the second interface is no longer limited to power supply devices such as adapters, but can also be a USB flash drive, a display device, etc., greatly enriching the function of the second interface and solving the problem of the second interface having a single function. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of an existing multi-interface connection circuit.

[0019] Figure 2 This is a schematic block diagram of a multi-interface connection circuit provided in an embodiment of this application;

[0020] Figure 3 This is a circuit connection diagram of a voltage detection unit provided in an embodiment of this application;

[0021] Figure 4 This is a schematic block diagram of a multi-interface connection circuit provided in another embodiment of this application;

[0022] Figure 5 This is a circuit connection diagram of a voltage detection unit provided in another embodiment of this application.

[0023] In the diagram: 10. Multi-interface connection circuit; 101. First switching unit; 102. Second switching unit; 103. First power supply unit; 104. Protocol unit; 105. Hub unit; 106. Video processing unit; 107. Second power supply unit; 20. First device; 30. Second device; 40. Third device; 50. Fourth device; 60. Power supply equipment. Detailed Implementation

[0024] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of this application. However, those skilled in the art will understand that this application may also be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods have been omitted so as not to obscure the description of this application with unnecessary detail.

[0025] It should be understood that, when used in this application specification and the appended claims, the term "comprising" indicates the presence of the described features, integrals, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or a collection thereof.

[0026] As used in this application specification and the appended claims, the term "if" may be interpreted, depending on the context, as "when," "once," "in response to determination," or "in response to detection." Similarly, the phrase "if determined" or "if [the described condition or event] is detected" may be interpreted, depending on the context, as "once determined," "in response to determination," "once [the described condition or event] is detected," or "in response to detection of [the described condition or event]."

[0027] Furthermore, in the description of this application and the appended claims, the terms "first," "second," "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0028] References to "one embodiment" or "some embodiments" as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0029] Today, the USB-C interface has become the standard interface for smart devices such as mobile phones and computers. Therefore, third-party connectors for mobile phones and computers are also commonly equipped with USB-C interfaces. These connectors enable charging of mobile phones or computers, as well as the transmission of data and video signals. To meet the demand for charging these types of interface devices, various multi-interface connection circuits have emerged on the market. For example... Figure 1 As shown, existing multi-interface connection circuits mainly include a first interface, a second interface, a third interface unit, a fourth interface unit, a first switch unit, a second switch unit, a hub unit, a video processing unit, a first power supply unit, and a protocol unit. The first interface is used to connect to a first device (such as a mobile phone / computer), and the second interface is used to connect to a second device (such as an adapter). This design means that the second device connected to the second interface can only be selected as a device for powering the system, and cannot be expanded with other functions, making the function of the second interface relatively simple.

[0030] Based on the above problems, the multi-interface connection circuit provided in this application includes a first switch unit, a second switch unit, a first power supply unit, a protocol unit, a hub unit, a video processing unit, a first interface, a second interface, a third interface unit, and a fourth interface unit. In actual use, the first interface is used for electrical connection with a first device, the second interface is used for electrical connection with a second device, the third interface unit is used for electrical connection with a third device, and the fourth interface unit is used for electrical connection with a fourth device. The second interface is also electrically connected to the hub unit, the video processing unit, and the protocol unit, respectively, and can receive signals output by the hub unit, signals output by the video processing unit, and configuration signals output by the protocol unit, ensuring bidirectional transmission between the second interface and the second device. Therefore, the multi-interface connection circuit provided in this application adds one signal transmission path from the hub unit to the second interface and one signal transmission path from the video processing unit to the second interface, and configures the second interface, effectively expanding the application scope of the second interface. This means that the second device connected to the second interface is no longer limited to power supply devices such as adapters, but can also be a USB flash drive, a display device, etc., greatly enriching the function of the second interface and solving the problem of the second interface having a single function.

[0031] To illustrate the technical solution described in this application, specific embodiments are provided below.

[0032] Figure 2 A schematic block diagram of a multi-interface connection circuit 10 according to an embodiment of this application is shown. See also Figure 2As shown, the multi-interface connection circuit 10 includes a first switch unit 101, a second switch unit 102, a first power supply unit 103, a protocol unit 104, a hub unit 105, a video processing unit 106, a first interface, a second interface, a third interface unit, and a fourth interface unit. The first power supply unit 103 is electrically connected to the first switch unit 101, the second switch unit 102, the protocol unit 104, the hub unit 105, the video processing unit 106, and the third interface unit. The protocol unit 104 is electrically connected to the first switch unit 101, the second switch unit 102, the video processing unit 106, the first interface, and the second interface. The first interface is electrically connected to the first switch unit 101, the hub unit 105, and the video processing unit 106. The second interface is electrically connected to the second switch unit 102, the hub unit 105, and the video processing unit 106. The third interface unit is electrically connected to the hub unit 105. The fourth interface unit is electrically connected to the video processing unit 106. The first interface is used to electrically connect to the first device 20. The second interface is used to electrically connect to the second device 30. The third interface unit is used to electrically connect to the third device 40. The fourth interface unit is used to electrically connect to the fourth device 50.

[0033] Specifically, the second interface is also electrically connected to the hub unit 105, the video processing unit 106, and the protocol unit 104, respectively. It can receive signals output from the hub unit 105, the video processing unit 106, and the configuration signal output from the protocol unit 104, ensuring bidirectional transmission between the second interface and the second device 30. Therefore, the multi-interface connection circuit 10 provided in this embodiment adds one signal transmission path from the hub unit 105 to the second interface, and another signal transmission path from the video processing unit 106 to the second interface, and configures the second interface, effectively expanding its application scope. This means that the second device 30 connected to the second interface is no longer limited to power supply devices such as adapters, but can also be a USB flash drive, display device, etc., greatly enriching the functionality of the second interface and solving the problem of its limited functionality.

[0034] It should be noted that the protocol unit 104 is electrically connected to the first switch unit 101, the second switch unit 102, the video processing unit 106, the first interface, and the second interface, respectively. It can communicate with the first device 20 and the second device 30, and configures the second interface to support DRP (Dual Role Power) and DP ALT MODE (DisplayPortAlternate Mode) functions. It can also complete power configuration by controlling the on and off states of the first switch unit 101 and the second switch unit 102. The second interface can receive USB signals output from the hub unit 105 and DP signals output from the video processing unit 106, and achieve bidirectional transmission with the second device 30. Therefore, the multi-interface connection circuit 10 provided in this embodiment adds a USB signal transmitted from the hub unit 105 to the second interface, and a DP signal transmitted from the video processing unit 106 to the second interface, and configures the second interface to support DRP and DP ALTMODE functions, thereby effectively expanding the application scope of the second interface.

[0035] It should be noted that the first device 20 can be a mobile phone or computer, the second device 30 can be an adapter, USB flash drive, display device (such as a monitor), etc., the third device 40 can be various electronic devices with USB interfaces, and the fourth device 50 can be an audio / video display device. The protocol unit 104 can communicate with the first device 20 and the second device 30 via a protocol. Simultaneously, the protocol unit 104 can also control the on / off states of the first switch unit 101 and the second switch unit 102 to complete power configuration, USB data, and audio / video signal transmission. Specifically, the protocol unit 104 can obtain first status information indicating whether the first interface is connected to the first device 20 and second status information indicating whether the second interface is connected to the second device 30, and determine the on / off states of the first switch unit 101 and the second switch unit 102 based on the first and second status information. When only the first device 20 is connected, the protocol unit 104 communicates with the first device 20 and controls the first switch unit 101 to turn on, so that the first power supply unit 103 can supply power to the first device 20 through the first switch unit 101 and the first interface, thereby completing power configuration, USB data, and audio / video signal transmission. When only the second device 30 is connected, the protocol unit 104 communicates with the second device 30 and controls the second switch unit 102 to turn on, completing power configuration, USB data, and audio / video signal transmission. When both the first device 20 and the second device 30 are connected and the second device 30 is an adapter, the protocol unit 104 notifies the first device 20 to switch the power supply direction and controls both the first switch unit 101 and the second switch unit 102 to turn on, so that the adapter can charge the first device 20 without affecting USB data and audio / video signal transmission.

[0036] It should be noted that, as Figure 3 As shown, the first and second interfaces are both USB-C interfaces, the third interface unit includes multiple USB interfaces, which can be connected to multiple third devices 40 simultaneously, and the fourth interface unit includes multiple video interfaces, which can be connected to multiple fourth devices 50 simultaneously. Figure 3 The diagram only shows the cases where the third interface unit includes a USB interface and is connected to a third device 40, the fourth interface unit includes a video interface and is connected to a fourth device 50, the third interface unit includes multiple USB interfaces and is connected to multiple third devices 40 simultaneously, and the fourth interface unit includes multiple video interfaces and is connected to multiple fourth devices 50 simultaneously. The basic principle is basically the same as the above principle, and will not be elaborated on further here.

[0037] It should be noted that both the first and second interfaces include a power line, a ground line, and a CC (Configuration Channel). The CC configuration channel is used for device capability configuration and device type identification, etc. The first interface can achieve power circuit connection and CC configuration channel connection with the first device 20, power circuit connection with the first switch unit 101, CC configuration channel connection with the protocol unit 104, USB data transmission with the hub unit 105, and audio / video signal transmission with the video processing unit 106. Similarly, the second interface can achieve power circuit connection and CC configuration channel connection with the second device 30, power circuit connection with the second switch unit 102, CC configuration channel connection with the protocol unit 104, USB data transmission with the hub unit 105, and DP signal transmission with the video processing unit 106. The first power supply unit 103 can be connected to the first switch unit 101, the second switch unit 102, the protocol unit 104, the hub unit 105, the video processing unit 106, and the third interface unit via power circuits. The protocol unit 104 can be connected to the first switch unit 101 and the second switch unit 102 via control circuits. The protocol unit 104 can transmit positive and negative insertion signals to the video processing unit 106, that is, the protocol unit 104 can feed back the positive and negative insertion signals of the first device 20 connected to the first interface to the video processing unit 106.

[0038] It should be noted that the hub unit 105 is used to receive the USB signal transmitted by the first device 20 through the first interface, and to transmit the USB signal to the third interface unit and the second interface. The video processing unit 106 is used to receive the audio and video signals transmitted by the first device 20 through the first interface, and to transmit the DP signal to the fourth interface unit and the second interface.

[0039] In one embodiment of this application, the first switch unit 101 includes a first switch, the first end of the first switch is electrically connected to the first power supply unit 103, the second end of the first switch is electrically connected to the first interface, and the control end of the first switch is electrically connected to the protocol unit 104.

[0040] Specifically, the first switch is used to control the connection between the first power supply unit 103 and the first interface, ensuring that the first power supply unit 103 can charge the first device 20. When the first interface is electrically connected to the first device 20, the protocol unit 104 obtains the first interface access to the first device 20 through the CC configuration channel and controls the first switch to turn on, thereby connecting the first power supply unit 103 and the first interface, enabling the first power supply unit 103 to supply power to the first device 20.

[0041] For example, the first switch can be a MOS switch.

[0042] In one embodiment of this application, the second switch unit 102 includes a second switch, the first end of the second switch is electrically connected to the first power supply unit 103, the second end of the second switch is electrically connected to the second interface, and the control end of the second switch is electrically connected to the protocol unit 104.

[0043] Specifically, the second switch controls the connection between the first power supply unit 103 and the second interface, ensuring that the first power supply unit 103 can supply power to the second device 30 (if the second device 30 is a display). When the second interface is electrically connected to the second device 30, the protocol unit 104 obtains the connection of the second interface to the second device 30 through the CC configuration channel and controls the second switch to turn on, thereby connecting the first power supply unit 103 and the second interface, enabling the first power supply unit 103 to supply power to the second device 30. If the second device 30 is an adapter, the protocol unit 104 controls the second switch to turn on, completing the power configuration. If both the first device 20 and the second device 30 are connected and the second device 30 is an adapter, the protocol unit 104 controls both the first and second switches to turn on, enabling the adapter to charge the first device 20.

[0044] For example, the second switch can be a MOS switch.

[0045] In one embodiment of this application, the first power supply unit 103 includes a first voltage converter, which is electrically connected to the first switching unit 101, the second switching unit 102, the protocol unit 104, the hub unit 105 and the video processing unit 106 respectively.

[0046] Specifically, the first voltage converter can be a buck converter, which converts the input high voltage to a low voltage to power the protocol unit 104, hub unit 105, and video processing unit 106, ensuring their normal and stable operation. Simultaneously, the first voltage converter can also perform voltage conversion to obtain the required voltages for the first device 20 and the second device 30, thereby powering both devices.

[0047] In one embodiment of this application, the protocol unit 104 includes a controller chip, which is electrically connected to the first power supply unit 103, the first switch unit 101, the second switch unit 102, the video processing unit 106, the first interface, and the second interface.

[0048] Specifically, the controller chip communicates with the first device 20 and controls the first switch unit 101 to turn on when it detects that the first interface is connected to the first device 20, thus completing power configuration. The controller chip also communicates with the second device 30 and controls the second switch unit 102 to turn on when it detects that the second interface is connected to the second device 30, thus completing power configuration. Furthermore, when it detects that the first interface is connected to the first device 20, the second interface is connected to the second device 30, and the second device 30 is an adapter, the controller chip controls the first switch unit 101 and the second switch unit 102 to turn on, enabling the adapter to charge the first device 20. The controller chip also configures the second interface to support DRP and DP ALT MODE functions, and can also feed back the positive / negative insertion signal of the first device 20 connected to the first interface to the video processing unit 106.

[0049] For example, protocol unit 104 is a USB-PD protocol unit.

[0050] In one embodiment of this application, the hub unit 105 (i.e., USB HUB unit) includes a hub chip, which is electrically connected to the first power supply unit 103, the first interface, the second interface and the third interface unit respectively.

[0051] Specifically, the hub chip can receive USB signals transmitted by the first device 20 through the first interface and transmit USB signals to the third interface unit and the second interface. Since the third interface unit may include multiple USB ports, the hub chip can convert a single USB signal into multiple outputs, ensuring that multiple devices share USB resources efficiently and securely.

[0052] In one embodiment of this application, the video processing unit 106 includes a video processing chip, which is electrically connected to the first power supply unit 103, the protocol unit 104, the first interface, the second interface, and the fourth interface unit.

[0053] Specifically, the video processing chip can receive audio and video signals transmitted by the first device 20 through the first interface, and transmit DP signals to the fourth interface unit and the second interface. Since the fourth interface unit can include multiple video interfaces, the video processing chip can convert a single video signal into multiple outputs, ensuring that multiple devices can efficiently and securely share video resources.

[0054] In one embodiment of this application, such as Figure 4 As shown, the multi-interface connection circuit 10 also includes a second power supply unit 107 and a fifth interface. The second power supply unit 107 is electrically connected to the first switch unit 101, the second switch unit 102, the first power supply unit 103, the protocol unit 104 and the fifth interface, respectively. The fifth interface is used to electrically connect to the power supply device 60.

[0055] Specifically, when the first device 20 is connected to the first interface and the second device 30 is connected to the second interface, and the second device 30 is a mouse, USB flash drive, or monitor, by adding a fifth interface and a second power supply unit 107, the power supply device 60 can supply power to the system and the first device 20, etc. During this process, the protocol unit 104 can output control signals to the second power supply unit 107 according to the connection status and information of the first device 20 and the second device 30, so as to control the second power supply unit 107 to feed back an appropriate voltage to supply power to other units in the multi-interface connection circuit 10.

[0056] It should be noted that the second power supply unit 107 may include a second voltage converter. The second voltage converter is connected to the power supply circuits of the first switching unit 101, the second switching unit 102 and the first power supply unit 103 respectively. The second voltage converter is electrically connected to the protocol unit 104, that is, the control terminal of the second voltage converter is electrically connected to the protocol unit 104, and can receive the control signal output by the protocol unit 104 and feed back an appropriate voltage.

[0057] For example, the fifth interface can be a DC interface, and the power supply device 60 connected to the fifth interface can be a DC adapter, which supplies power to the second power supply unit 107.

[0058] This application also discloses a multi-interface connector, including the multi-interface connection circuit 10 described above. The multi-interface connector using the multi-interface connection circuit described above can meet various needs such as data storage, video display, and device power supply, thereby improving the applicability of the multi-interface connector.

[0059] This application also discloses a communication system, including a first device 20, a second device 30, a third device 40, a fourth device 50, a power supply device 60, and the aforementioned multi-interface connector. The first device 20 is electrically connected to the first interface of the multi-interface connector, the second device 30 is electrically connected to the second interface of the multi-interface connector, the third device 40 is electrically connected to the third interface unit of the multi-interface connector, the fourth device 50 is electrically connected to the fourth interface unit of the multi-interface connector, and the power supply device 60 is electrically connected to the fifth interface of the multi-interface connector. The communication system using the aforementioned multi-interface connector can flexibly connect to various devices according to different usage scenarios and needs, enhancing the system's versatility.

[0060] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A multi-interface connection circuit, characterized in that, It includes a first switch unit, a second switch unit, a first power supply unit, a protocol unit, a hub unit, a video processing unit, a first interface, a second interface, a third interface unit, and a fourth interface unit; The first power supply unit is electrically connected to the first switch unit, the second switch unit, the protocol unit, the hub unit, the video processing unit, and the third interface unit. The protocol unit is electrically connected to the first switch unit, the second switch unit, the video processing unit, the first interface, and the second interface. The first interface is electrically connected to the first switch unit, the hub unit, and the video processing unit. The second interface is electrically connected to the second switch unit, the hub unit, and the video processing unit. The third interface unit is electrically connected to the hub unit. The fourth interface unit is electrically connected to the video processing unit. The first interface is used for electrical connection to a first device. The second interface is used for electrical connection to a second device. The third interface unit is used for electrical connection to a third device. The fourth interface unit is used for electrical connection to a fourth device.

2. The multi-interface connection circuit according to claim 1, characterized in that, The first switching unit includes a first switch, a first end of the first switch is electrically connected to the first power supply unit, a second end of the first switch is electrically connected to the first interface, and a control end of the first switch is electrically connected to the protocol unit.

3. The multi-interface connection circuit according to claim 1, characterized in that, The second switching unit includes a second switch, a first end of which is electrically connected to the first power supply unit, a second end of which is electrically connected to the second interface, and a control end of which is electrically connected to the protocol unit.

4. The multi-interface connection circuit according to claim 1, characterized in that, The protocol unit includes a controller chip, which is electrically connected to the first power supply unit, the first switch unit, the second switch unit, the video processing unit, the first interface, and the second interface, respectively.

5. The multi-interface connection circuit according to claim 1, characterized in that, The hub unit includes a hub chip, which is electrically connected to the first power supply unit, the first interface, the second interface and the third interface unit respectively.

6. The multi-interface connection circuit according to claim 1, characterized in that, The video processing unit includes a video processing chip, which is electrically connected to the first power supply unit, the protocol unit, the first interface, the second interface, and the fourth interface unit.

7. The multi-interface connection circuit according to claim 1, characterized in that, The first interface and the second interface are both USB-C interfaces, the third interface unit includes multiple USB interfaces, and the fourth interface unit includes multiple video interfaces.

8. The multi-interface connection circuit according to any one of claims 1-7, characterized in that, The multi-interface connection circuit further includes a second power supply unit and a fifth interface. The second power supply unit is electrically connected to the first switch unit, the second switch unit, the first power supply unit, the protocol unit, and the fifth interface, respectively. The fifth interface is used to electrically connect to the power supply equipment.

9. The multi-interface connection circuit according to claim 8, characterized in that, The fifth interface is a DC interface.

10. A multi-interface connector, characterized in that, Includes the multi-interface connection circuit as described in any one of claims 1-9.

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