Expansion device
By introducing a power control circuit and a multiplexer into the expansion device, the power-on of the USB hub can be selectively controlled according to the port status, thus solving the problem of continuous power consumption by the USB hub and achieving energy saving and extended standby time.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-13
- Publication Date
- 2026-04-03
AI Technical Summary
Commercial USB hubs continuously consume power when connected to electronic devices, resulting in shorter device standby time.
Design an expansion device comprising a power control circuit, a USB hub, and a multiplexer, which selectively turns the USB hub on or off by detecting port status to achieve power management and data transmission.
Reduce the power consumption of electronic devices, save energy, extend standby time, avoid the continuous power consumption of USB hubs, and improve the flexibility and efficiency of device connectivity.
Smart Images
Figure CN224082024U_ABST
Abstract
Description
Technical Field
[0001] This disclosure relates to an expansion device, and more particularly to an expansion device suitable for electronic devices. Background Technology
[0002] Generally, some commercial Universal Serial Bus (USB) hubs continuously consume the power of user devices (such as smartphones, tablets, and laptops) as soon as they are connected, resulting in a significant reduction in the standby time of the user devices. Therefore, it is necessary to solve the above problem. Utility Model Content
[0003] One aspect of this disclosure is an expansion device. The expansion device is suitable for electronic devices. The electronic devices are used to couple to an input device and / or at least one external device via the expansion device. The expansion device includes multiple ports, a Universal Serial Bus (USB) hub, a multiplexer, and power control circuitry. The multiple ports include a first port, a second port, and at least one third port. The USB hub is coupled to the second port and at least one third port. The multiplexer is coupled to the first port, the second port, and the USB hub. The power control circuitry is coupled to the multiple ports, the multiplexer, and the USB hub, and is used to selectively power on the USB hub based on the state of the second port and the state of at least one third port, provided that the first port is active.
[0004] Another aspect of this disclosure is an expansion device. The expansion device is suitable for electronic devices. The electronic device is used to couple to at least one external device via the expansion device. The expansion device includes multiple ports, a Universal Serial Bus (USB) hub, a multiplexer, an input device, and power control circuitry. The multiple ports include a first port, a second port, and at least one third port. The USB hub is coupled to the second port and at least one third port. The multiplexer is coupled to the first port, the second port, and the USB hub. The input device is electrically connected to the second port. The power control circuitry is coupled to the multiple ports, the multiplexer, and the USB hub, and is used to selectively power on the USB hub based on the state of at least one third port, while the first port is in an active state.
[0005] When the first port is in the working state, the power control circuit turns the USB hub on or off according to the state of the second port and at least one third port (or according to the state of at least one third port). The expansion device of this disclosure has advantages such as reducing the power consumption of electronic devices, saving energy, being able to be connected to electronic devices for a long time, and not affecting the standby time of electronic devices. Attached Figure Description
[0006] Figure 1A circuit block diagram of an expansion device is shown for some embodiments of the present disclosure.
[0007] Figure 2A This is a schematic diagram illustrating a usage scenario of an expansion device according to some embodiments of the present disclosure.
[0008] Figure 2B This is a schematic diagram illustrating a usage scenario of an expansion device according to some embodiments of the present disclosure.
[0009] Figure 2C This is a schematic diagram illustrating a usage scenario of an expansion device according to some embodiments of the present disclosure.
[0010] Figure 3 A circuit block diagram of an expansion device is shown for some embodiments of the present disclosure.
[0011] Explanation of reference numerals in the attached figures:
[0012] 10: Electronic devices
[0013] 20: Input device
[0014] 30, 40: External devices
[0015] 100: Expansion Device
[0016] 110: Power control circuit
[0017] 120: USB Hub
[0018] 130: Multiplexer
[0019] 140, 150, 160A, 160B: Ports
[0020] 170A, 170B, 170C, 170D, 170E: Switching circuits
[0021] 631: Audio Port
[0022] 633: Interface Adapter
[0023] H, L: Logic level
[0024] P1, P2: Signal paths
[0025] S1, S2, S3, S4: Status signals
[0026] VSUP: Power Supply Voltage Detailed Implementation
[0027] The following detailed description of embodiments, in conjunction with the accompanying drawings, is provided. However, the specific embodiments described are only for explaining this case and are not intended to limit this case. The description of the structural operations is not intended to limit the order of their execution. Any structure resulting from the recombination of elements and producing an apparatus with equivalent functionality is within the scope of this disclosure.
[0028] Unless otherwise specified, the terms used throughout the specification and the scope of the patent application generally have their ordinary meaning in the context of the art, the disclosure, and the specific content.
[0029] The terms "coupled" or "connected" as used in this article can refer to two or more components making direct physical or electrical contact with each other, or making indirect physical or electrical contact with each other, or to two or more components operating or acting on each other.
[0030] Please see Figure 1 , Figure 1 The circuit block diagram illustrates an expansion device 100 according to some embodiments of the present disclosure. In some embodiments, such as Figure 1 As shown, the expansion device 100 includes a power control circuit 110, a Universal Serial Bus (USB) hub 120, a multiplexer 130, ports 140, 150, and multiple ports 160A and 160B.
[0031] In some embodiments, port 140 can be implemented using a USB-C plug. Accordingly, the expansion device 100 can be electrically connected via port 140 to any device with a USB-C socket (e.g., a smartphone, tablet, laptop, or other user-operable mobile device), and can expand the aforementioned device with any accessories or devices (e.g., external devices such as a monitor, speaker, mouse, and keyboard) via port 150 and multiple ports 160A and 160B to meet the needs of the user of the aforementioned device. Furthermore, port 150 can be implemented using a USB-A socket, port 160A can be implemented using a USB-C socket, and port 160B can be implemented using a USB-A socket, but this disclosure is not limited thereto. For example, in some embodiments, port 140, port 150, and multiple ports 160A and 160B can each be any type of plug or socket such as USB-A, USB-C, pogo pin, or Lightning.
[0032] like Figure 1As shown, the power control circuit 110 is coupled to the USB hub 120, the multiplexer 130, port 140, port 150, and multiple ports 160A and 160B. The multiplexer 130 is coupled to port 140, port 150, and the USB hub 120. The USB hub 120 is coupled to port 150 and multiple ports 160A and 160B.
[0033] In some embodiments, the power control circuit 110 receives multiple status signals S1-S4 from ports 140, 150, and multiple ports 160A and 160B. Each of the multiple status signals S1-S4 indicates whether a corresponding port 140, port 150, or port 160A and 160B is in an active or inactive state. For example, taking port 140 and the aforementioned mobile device as an example, if port 140 is in an active state, it indicates that port 140 is electrically connected to the aforementioned mobile device. If port 140 is in an inactive state, it indicates that port 140 is not electrically connected to the aforementioned mobile device.
[0034] As described above, the power control circuit 110 can know the status of ports 140, 150 and multiple ports 160A and 160B through multiple status signals S1~S4, and can control the multiplexer 130 and USB hub 120 accordingly, thereby realizing functions such as power management and data transmission.
[0035] Next, pair Figures 2A-2C The diagram further illustrates the operation of the expansion device 100. Figures 2A-2C The figures are schematic diagrams illustrating various usage scenarios of the expansion device 100 according to some embodiments of the present disclosure. Figures 2A-2C In the embodiment shown in the figure, port 140 can be implemented using a USB-C plug, port 150 can be implemented using a single-pin spring connector (pogo pin), and ports 160A and 160B can both be implemented using a USB-C socket. In some embodiments, port 150 can also be implemented using a socket of type USB-A, USB-C, etc., and is not limited thereto.
[0036] In some embodiments, such as Figure 2A As shown, expansion device 100 is electrically connected to electronic device 10 via port 140 and to input device 20 via port 150. Specifically, electronic device 10 can be implemented as a tablet computer, while input device 20 can be implemented as a keyboard. Furthermore, neither port 160A nor port 160B is connected to any external device.
[0037] exist Figure 2AIn the usage scenario, port 140 generates a status signal S1 with a logic level L, port 150 generates a status signal S4 with a logic level L, and ports 160A and 160B generate status signals S2 and S3 with logic levels H, respectively. Specifically, the logic level L may correspond to the lowest voltage level (e.g., ground voltage) that the expansion device 100 can reach by setting, and is used to indicate that the corresponding port 140 or port 150 is connected or in a working state. The logic level H may correspond to the highest voltage level (e.g., power supply voltage) that the expansion device 100 can reach by setting, and is used to indicate that the corresponding port 160A or port 160B is not connected or in a non-working state. This disclosure is not limited to the above description. In some embodiments, the logic level H may indicate that the corresponding port is connected or in a working state, and the logic level L may indicate that the corresponding port is not connected or in a non-working state.
[0038] Following the above, let's further illustrate with examples of ports 140 and 160A, which are respectively implemented by a USB-C plug and a USB-C socket. Ports 140 and 160A can generate status signals S1 and S2 respectively through their own configuration channel pins. For example, when the configuration channel pin of port 140 is in contact with a conductive terminal on the electronic device 10, the configuration channel pin of port 140 will generate a status signal S1 with a logic level L. Similarly, when the configuration channel pin of port 160A is not in contact with any conductive terminal, the configuration channel pin of port 160A will generate a status signal S2 with a logic level H. It should be understood that ports 150 and 160B can also generate status signals S4 and S3 respectively through their own specific pins.
[0039] exist Figure 2AIn the usage scenario, by receiving multiple status signals S1~S4, the power control circuit 110 learns that ports 140 and 150 are both in the working state, and that ports 160A and 160B are both in the non-working state. Accordingly, the power control circuit 110 stops supplying power to the USB hub 120. Simultaneously, since the USB hub 120 is not powered and cannot operate, the multiplexer 130 is further controlled by the power control circuit 110 to enable the signal path P1 between ports 140 and 150. As explained above, the power control circuit 110 can control the power supplied to the USB hub 120 based on the logic level (i.e., logic level H or logic level L) of the received status signals S1~S4, thus enabling or disabling the USB hub 120. When one of the plurality of status signals is at a first logic level, the power control circuit determines that a corresponding port among the plurality of ports is in the working state; and when the one of the plurality of status signals is at a second logic level, the power control circuit determines that the corresponding port among the plurality of ports is in the non-working state. This saves power consumption supplied by the electronic device 10 to the expansion device 100, and avoids the USB hub 120 from being continuously turned on, further achieving energy-saving effects, such as reducing the overall temperature of the expansion device 100, reducing power consumption and / or heat generation of the expansion device 100, etc.
[0040] It should be understood that, in the above embodiments, the expansion device 100 operates only if the electronic device 10 is electrically connected to the expansion device 100. If only the input device 20 is electrically connected to the expansion device 100, the expansion device 100 will not operate because there is no power source (i.e., the electronic device 10). In other words, when the expansion device 100 is electrically connected to the electronic device 10, the electronic device 10 provides the power required by the expansion device 100 through port 140.
[0041] Depend on Figure 2A As can be seen from the description, in some embodiments, when port 140 is in the working state, in response to port 150 being in the working state and multiple ports 160A and 160B being in the non-working state, the power control circuit 110 shuts down the USB hub 120 and controls the multiplexer 130 to switch to conducting the signal path P1 between port 140 and port 150 by, for example, transmitting a switching signal (not shown) to the multiplexer 130. Specifically, the signal path P1 does not conduct between port 140 and USB hub 120, that is, port 140 and USB hub 120 are not electrically connected through multiplexer 130, so electronic device 10 and input device 20 can transmit data to each other without going through USB hub 120.
[0042] In some embodiments, such as Figure 2BAs shown, expansion device 100 is electrically connected to electronic device 10 via port 140, to input device 20 via port 150, and to external device 30 via port 160A. Specifically, electronic device 10 can be implemented as a tablet computer, input device 20 as a keyboard, and external device 30 as a USB device with a USB-C plug or a USB-C socket that can be connected via a USB-C cable. That is to say, in Figure 2B In this embodiment, only port 160B is not connected to an external device.
[0043] exist Figure 2B In this usage scenario, port 140 generates a status signal S1 with logic level L, port 150 generates a status signal S4 with logic level L, port 160A generates a status signal S2 with logic level L, and port 160B generates a status signal S3 with logic level H. By receiving multiple status signals S1~S4, the power control circuit 110 determines that only port 160B is in a non-operating state. Accordingly, the power control circuit 110 supplies power to the USB hub 120. Simultaneously, since the USB hub 120 is operational, the multiplexer 130 is further controlled by the power control circuit 110 to enable the signal path P2 between port 140 and the USB hub 120.
[0044] Depend on Figure 2B As can be seen from the description, in some embodiments, when port 140 is in an active state, in response to port 150 being in an active state and at least one of the plurality of ports 160A and 160B (i.e., port 160A) being in an active state, the power control circuit 110 turns on the USB hub 120 and controls the multiplexer 130 to switch to conduct the signal path P2 between port 140 and USB hub 120. Therefore, electronic device 10 and input device 20 transmit data to each other through multiplexer 130 and USB hub 120 (i.e., through signal path P2). In addition, external device 30 also transmits data to electronic device 10 through multiplexer 130 and USB hub 120 (i.e., through signal path P2).
[0045] In some embodiments, such as Figure 2C As shown, expansion device 100 is electrically connected to electronic device 10 via port 140 and to external device 30 via port 160A. Specifically, electronic device 10 can be implemented as a tablet computer, while external device 30 can be implemented as a USB device with a USB-C plug or connected to a USB-C socket via a USB-C cable.
[0046] exist Figure 2CIn this usage scenario, port 140 generates a status signal S1 with logic level L, port 150 generates a status signal S4 with logic level H, port 160A generates a status signal S2 with logic level L, and port 160B generates a status signal S3 with logic level H. By receiving multiple status signals S1~S4, the power control circuit 110 determines that ports 140 and 160A are in an active state, and that ports 150 and 160B are in an inactive state. Accordingly, the power control circuit 110 supplies power to the USB hub 120. Simultaneously, since the USB hub 120 is operational, the multiplexer 130 is further controlled by the power control circuit 110 to enable the signal path P2 between port 140 and the USB hub 120.
[0047] Depend on Figure 2C As can be seen from the description, in some embodiments, when port 140 is in an active state, in response to at least one of the plurality of ports 160A and 160B (i.e., port 160A) being in an active state, the power control circuit 110 turns on the USB hub 120 and controls the multiplexer 130 to switch to conduct the signal path P2 between port 140 and USB hub 120. Therefore, electronic device 10 and external device 30 transmit data to each other through multiplexer 130 and USB hub 120.
[0048] In the above embodiments, the power control circuit 110 can be implemented using a USB power delivery integrated circuit (USB power delivery IC) for power distribution, which will be discussed later. Figure 3 Please refer to the explanation. Figure 3 , Figure 3 The circuit block diagram illustrates an expansion device 100 according to some embodiments of this disclosure. Compared to Figure 1 In the embodiments, Figure 3 In one embodiment, the expansion device 100 further includes a plurality of switching circuits 170A to 170E.
[0049] Switching circuit 170A is coupled between port 140 and power control circuit 110. Switching circuit 170B is coupled between port 160A and power control circuit 110. Switching circuit 170C is coupled between port 160B and power control circuit 110. Switching circuit 170D is coupled between port 150 and power control circuit 110. Switching circuit 170E is coupled between USB hub 120 and power control circuit 110. In short, multiple switching circuits 170A to 170E are each coupled between port 140, port 150, and the corresponding ports 160A and 160B in USB hub 120 and power control circuit 110. Specifically, each of the multiple switching circuits 170A to 170E can be implemented by a switch such as a metal-oxide-semiconductor field-effect transistor (MOSFET), but this disclosure is not limited thereto.
[0050] also, Figure 3 Port 160B includes an audio port 631 and an interface adapter 633, and the interface adapter 633 can be coupled between the audio port 631 and the USB hub 120. Specifically, the audio port 631 can be implemented via an audio jack, while the interface adapter 633 can be implemented via a USB audio codec.
[0051] In some embodiments, the power control circuit 110 is used to control multiple switching circuits 170A~170E according to the states of port 140, port 150, and multiple ports 160A and 160B, in order to perform power distribution, which will be described in the following paragraphs. Figure 3 Let's take a usage scenario as an example to illustrate.
[0052] like Figure 3 As shown, expansion device 100 is electrically connected to electronic device 10 via port 140, to input device 20 via port 150, and to external device 40 via port 160B. Specifically, electronic device 10 can be implemented as a tablet computer, input device 20 can be implemented as a keyboard, and external device 40 can be implemented as any audio device with an audio connector or that can be connected to an audio jack via an audio cable.
[0053] exist Figure 3In this usage scenario, port 140 generates a status signal S1 with logic level L, port 150 generates a status signal S4 with logic level L, port 160A generates a status signal S2 with logic level H, and port 160B generates a status signal S3 with logic level L. By receiving multiple status signals S1~S4, the power control circuit 110 knows that ports 140, 150, and 160B are in the working state, and knows that port 160A is in the non-working state.
[0054] Accordingly, the power control circuit 110 controls switch circuits 170A, 170C, 170D, and 170E to be in a conducting state, and controls switch circuit 170B to be in a disconnected state. With this configuration, the power control circuit 110 can receive the supply voltage VSUP from the electronic device 10 via switch circuit 170A. The power control circuit 110 can supply the supply voltage VSUP, or a voltage derived from the converted supply voltage VSUP, to the external device 40 via switch circuit 170C and port 160B. The power control circuit 110 can supply the supply voltage VSUP, or a voltage derived from the converted supply voltage VSUP, to the input device 20 via switch circuit 170D and port 150. Furthermore, the power control circuit 110 can supply the supply voltage VSUP, or a voltage derived from the converted supply voltage VSUP, to the USB hub 120 via switch circuit 170E.
[0055] In addition, Figure 3 In this embodiment, since port 150 and at least one of the plurality of ports 160A and 160B (i.e., port 160B) are all in an active state, the power control circuit 110 controls the multiplexer 130 to conduct the signal path P2 between port 140 and USB hub 120. Therefore, electronic device 10 and input device 20 transmit data to each other through multiplexer 130 and USB hub 120, and electronic device 10 and external device 40 transmit data to each other through multiplexer 130 and USB hub 120.
[0056] Depend on Figure 3 As can be seen from the description, in some embodiments, the expansion device 100 may also include a power converter such as a DC-DC converter (e.g., a buck converter, a boost converter, etc.). The power converter may be coupled to the power control circuit 110 and may be used to convert, for example, the supply voltage VSUP, to provide a suitable voltage to the external device 40, the input device 20, and the USB hub 120.
[0057] In the above embodiments, the states of port 140, port 150, and ports 160A and 160B are detected by the power control circuit 110, but this disclosure is not limited thereto. For example, the function of detecting the states of port 140, port 150, and ports 160A and 160B can be separated from the power control circuit 110 and executed by a detection circuit (not shown in the figure). The detection circuit can be coupled to port 140, port 150, ports 160A and 160B, and the power control circuit 110, and can receive multiple status signals S1~S4 to generate and transmit detection results to the power control circuit 110. With this configuration, the power control circuit 110 can also know the states of port 140, port 150, and ports 160A and 160B from the detection results. In some further embodiments, the detection circuit can also perform overcurrent detection and / or overvoltage detection to achieve overcurrent protection and / or overvoltage protection.
[0058] In some embodiments, Figure 2B and Figure 2C The external device 30 can be implemented using a power adapter. When the external device 30 is electrically connected to port 160A, the power control circuit 110 can receive a power supply voltage (not shown) from the external device 30 through port 160A, and can charge the electronic device 10 using the power supply voltage or a voltage derived from the converted power supply voltage. In other words, the expansion device 100 also has the function of receiving power provided by the external device 30 and transmitting the power to the electronic device 10 to charge the electronic device 10.
[0059] From the above Figure 1 , Figures 2A-2C and Figure 3 As can be seen from the embodiments, the expansion device 100 of this disclosure is mainly used to meet the user's expansion needs for the electronic device 10. When port 140 is in the working state (i.e., when the electronic device 10 is electrically connected to port 140), the power control circuit 110 selectively turns on the USB hub 120 according to the state of port 150 and the states of multiple ports 160A and 160B. In this way, the expansion device 100 of this disclosure can avoid the problem in the related art that the USB hub will start to consume the power of the user device as soon as it is connected to the user device, thus having the advantages of reducing the power consumption of the electronic device 10, saving energy, being able to be connected to the electronic device 10 for a long time, and not affecting the standby time of the electronic device 10.
[0060] Furthermore, as can be seen from the description of the above embodiments, if only port 150 is active when port 140 is active, the power control circuit 110 will shut down the USB hub 120. The power control circuit is used to turn the USB hub on or off by turning on or off the corresponding of the plurality of switching circuits. This is because, in some embodiments, the input device 20 is integrated with the expansion device 100. In other words, the expansion device 100 may also include the input device 20, and the input device 20 is permanently electrically connected to port 150 (i.e., port 150 is permanently active). With this configuration, the power control circuit 110 only needs to selectively turn on the USB hub 120 based on the states of the plurality of ports 160A and 160B when port 140 is active. It is worth noting that when port 140 is in the working state, if multiple ports 160A and 160B are in the non-working state, the power control circuit 110 will shut down the USB hub 120, thereby enabling the expansion device 100, which includes the input device 20, to also have advantages such as reducing the power consumption of the electronic device 10, saving energy, being able to be connected to the electronic device 10 for a long time, and not affecting the standby time of the electronic device 10.
[0061] Although the present disclosure has been described above with reference to embodiments, it is not intended to limit the present disclosure. Those skilled in the art can make various modifications and refinements without departing from the spirit and scope of the present disclosure. Therefore, the scope of protection of the present disclosure shall be determined by the scope defined in the appended claims.
Claims
1. An expansion device suitable for electronic devices, characterized in that, The electronic device is configured to be coupled to an input device and / or at least one peripheral device via the expansion device, and the expansion device includes: a plurality of ports including a first port, a second port, and at least one third port; a USB hub coupled to the second port and the at least one third port; a multiplexer coupled to the first port, the second port, and the USB hub; a power control circuit coupled to the plurality of ports, the multiplexer, and the USB hub, and configured to selectively turn on the USB hub according to a state of the second port and a state of the at least one third port when the first port is in an active state. In response to the second port being in the active state and the at least one third port being in an inactive state when the first port is in the active state, the power control circuit turns off the USB hub and controls the multiplexer to switch on a signal path between the first port and the second port.
2. The expansion device of claim 1, wherein, In response to the second port being in the active state and the at least one third port being in the active state when the first port is in the active state, the power control circuit turns on the USB hub and controls the multiplexer to switch on a signal path between the first port and the USB hub.
3. The expansion device of claim 1, wherein, In response to the at least one third port being in the active state when the first port is in the active state, the power control circuit turns on the USB hub and controls the multiplexer to switch on a signal path between the first port and the USB hub.
4. The expansion device of claim 1, wherein, The expansion device further includes:
5. The expansion device of claim 1, wherein, a plurality of switch circuits, wherein each of the plurality of switch circuits is coupled between a corresponding one of the plurality of ports and the USB hub and the power control circuit, and the power control circuit is configured to control the plurality of switch circuits for power distribution according to a state of the first port, a state of the second port, and a state of the at least one third port. The power control circuit is configured to turn on or turn off the USB hub by switching on or switching off a corresponding one of the plurality of switch circuits.
6. The expansion device of claim 5, wherein, The first port is in the active state when the first port is electrically connected to the electronic device.
7. The augmentation device of claim 1, wherein, The second port is in the active state when the second port is electrically connected to the input device.
8. The augmentation device of claim 1, wherein, The at least one peripheral device is a USB device or a power converter, and the at least one third port is in the active state when the at least one third port is electrically connected to the at least one peripheral device.
9. The augmentation device of claim 1, wherein, The at least one third port includes an audio port and an interface adapter, the at least one peripheral device is an audio device, and the at least one third port is in the active state when the audio port is electrically connected to the audio device.
10. The augmentation device of claim 1, wherein, 11. The augmentation device of claim 1, wherein, The power control circuit is configured to receive a plurality of status signals from the plurality of ports and to control power supplied to the USB hub to turn on or off the USB hub according to logic levels of the plurality of status signals. When one of the plurality of status signals is at a first logic level, the power control circuit determines that a corresponding one of the plurality of ports is in the active state, and when the one of the plurality of status signals is at a second logic level, the power control circuit determines that the corresponding one of the plurality of ports is in the inactive state.
12. The augmentation device of claim 1, wherein, The expansion device further includes: a detection circuit coupled to the plurality of ports and the power control circuit and configured to receive a plurality of status signals from the plurality of ports to generate and transmit detection results to the power control circuit, wherein the detection results include that each of the plurality of ports is in the active state or the inactive state.
13. An expansion device suitable for electronic devices, characterized in that, The electronic device is configured to be coupled to at least one external device through the expansion device, and the expansion device includes: a plurality of ports including a first port, a second port, and at least one third port; a USB hub coupled to the second port and the at least one third port; a multiplexer coupled to the first port, the second port, and the USB hub; an input device electrically connected to the second port; and a power control circuit coupled to the plurality of ports, the multiplexer, and the USB hub and configured to selectively turn on the USB hub according to a state of the at least one third port when the first port is in the active state. In response to the at least one third port being in the inactive state when the first port is in the active state, the power control circuit turns off the USB hub and controls the multiplexer to switch to turn on a signal path between the first port and the second port.
14. The augmentation device of claim 13, wherein, In response to the at least one third port being in the active state when the first port is in the active state, the power control circuit turns on the USB hub and controls the multiplexer to switch to turn on a signal path between the first port and the USB hub.
15. The augmentation device of claim 13, wherein, The expansion device further includes:
16. The augmentation device of claim 13, wherein, a plurality of switch circuits, wherein each of the plurality of switch circuits is coupled between a corresponding one of the plurality of ports and the USB hub and the power control circuit, and the power control circuit is configured to control the plurality of switch circuits to perform power distribution according to a state of the first port, a state of the second port, and a state of the at least one third port. The power control circuit is configured to turn on or off the USB hub by turning on or off a corresponding one of the plurality of switch circuits.
17. The augmentation device of claim 16, wherein, The first port is in the active state when the first port is electrically connected to the electronic device.
18. The augmentation device of claim 13, wherein, The second port is in the active state when the second port is electrically connected to the input device.
19. The augmentation device of claim 13, wherein, 20. The augmentation device of claim 13, wherein, The at least one external device is a USB device or a power adapter, and the at least one third port is in the working state when the at least one third port is electrically connected to the at least one external device.
21. The augmentation device of claim 13, wherein, The at least one third port includes an audio port and an interface adapter, the at least one external device is an audio device, and the at least one third port is in the working state when the audio port is electrically connected to the audio device.
22. The augmentation device of claim 13, wherein, The power control circuit is used to receive a plurality of state signals from the plurality of ports and control the power supplied to the USB hub to turn on or off the USB hub according to the logic levels of the plurality of state signals, wherein when one of the plurality of state signals is in a first logic level, the power control circuit determines that a corresponding one of the plurality of ports is in the working state, and when the one of the plurality of state signals is in a second logic level, the power control circuit determines that the corresponding one of the plurality of ports is in a non-working state.
23. The augmentation device of claim 13, wherein, The expansion device further includes: a detection circuit coupled to the plurality of ports and the power control circuit, used to receive a plurality of state signals from the plurality of ports, to generate and transmit a detection result to the power control circuit, wherein the detection result includes that each of the plurality of ports is in the working state or the non-working state.