TW201706858A - Wireless docking station with switching function - Google Patents

Abstract

A wireless docking station comprises an extension interface for connecting to an external device, a wireless host interface for establishing wireless connections with multiple hosts, and a controller. The controller is configured to keep connections between the external device and the hosts according to a connection table, and switch control right of the external device between the hosts according to a switch command. The controller is also configured to transform an external device signal received from the external device into a wireless host signal and transfer the wireless host signal to one of the hosts holding the control right, or transform the wireless host signal received from the host holding the control right into the external device signal and transfer the external device signa to the external device.

Description

Wireless expander with switching function

This creation is related to expanders, especially about wireless extenders.

A docking station is a device used to expand the host's port so that the host can connect more external devices at the same time.

Please refer to FIG. 1. FIG. 1 is a schematic diagram of a conventional expander. As shown in FIG. 1, the conventional expander 10 includes a host port 100, a plurality of expansion ports 102a-102d, and a controller 104. The controller 104 is electrically connected to the host port 100 and the plurality of expansion ports 102a-102d.

A user can use a transmission line (such as a USB transmission line) to connect the host port 100 (such as a USB port) and a port 120 (such as a USB port) of a host 12. And a plurality of expansion devices, such as a keyboard 140, a mouse 142, an external hard disk 144, and an external display 146 are respectively connected to the plurality of expansion ports 102a-102d.

Specifically, the plurality of expansion ports 102a-102d may be different types of ports, respectively. The expansion port 102a and the expansion port 102b can be USB ports, and the keyboard 140 and the mouse 142 can be respectively connected via two USB transmission lines. The expansion port 102c can be a SATA port and can be connected to the external hard disk 144 via a SATA transmission line. The expansion port 102d can be an HDMI port and can be connected to the external display 146 via an HDMI transmission line. When one of the plurality of expansion ports 102a-102d is connected to the host 100, a different type of port (such as the expansion port 102d being an HDMI port and the host port 100 being a USB port), the controller The 104 can perform signal format conversion so that different types of the plurality of expansion ports 102a-102d and the host port 100 can communicate.

Therefore, the user can view the current display screen of the host 12 in the external display 146, and the external keyboard 140 and the mouse 142 can be used to operate the host 12, and the host 12 can be operated. The data is stored in the external hard disk 144. Moreover, through the use of the expander 10, the host 12 can simultaneously connect the expansion devices 140-146 through only one of the ports 120.

However, the conventional expander 10 can only connect to a single host 12, and cannot simultaneously connect a plurality of the hosts 10 and switch as needed. Moreover, the conventional expander 10 can only connect the host 10 via the transmission line, and cannot wirelessly connect the host 10, which will limit the installation position of the expander 10.

Therefore, the conventional expander has the above problems, and a more effective solution is proposed.

The main object of the present invention is to provide an expander that can wirelessly connect a plurality of hosts at the same time and can switch the control rights of the external device between the plurality of hosts.

To achieve the above objective, the present invention provides a wireless expander with a switching function, including an expansion interface for connecting an external device, a wireless host interface for establishing a plurality of wireless connections with a plurality of hosts, and electrically connecting the wireless host interface. A controller that expands the interface and the wireless host interface. The controller includes a switching module, a connection holding module, and a processing module connecting the switching module and the connection holding module. The switching module confirms a connection relationship between the external device and the plurality of hosts according to a connection table, and switches a control right of the external device to each host connected to the external device according to a switching instruction. The connection holding module maintains connection between each host connected to the external device and the external device according to the connection table. The processing module converts an external device signal received by the external device into a wireless host signal and transmits the signal to the host having the control, or the wireless host signal received from the host having the control right is the external connection The device signal is transmitted to the external device.

Compared with the prior art expander, the wireless expander of the present invention has a more flexible setting position. Moreover, the present invention can effectively improve the switching speed of the control right of the external device by keeping the plurality of hosts connected to the same external device at the same time.

DETAILED DESCRIPTION OF THE INVENTION A preferred embodiment of the present invention will be described in detail with reference to the drawings.

Please refer to FIG. 2, which is a structural diagram of a wireless expander according to a first embodiment of the present invention. As shown in FIG. 2, the wireless expander 2 (hereinafter referred to as the wireless expander 2) having the switching function of the present invention mainly includes a wireless host interface 20, an expansion interface 22, and a controller 24. The controller 24 is electrically connected to the wireless host interface 20 and the expansion interface 22.

The wireless host interface 20 is configured to establish a plurality of wireless connections with the plurality of first hosts 400, so that the controller 24 can communicate with each of the first hosts 400. Preferably, the plurality of first host computers 400 are smart phones, tablets, notebook computers, desktop computers or wearable devices, but should not be limited thereto.

Since the wireless expander 2 and the plurality of first hosts 400 can be wirelessly connected, the setting position of the wireless expander 2 of the present invention has greater flexibility without being limited by the length of the transmission line.

The expansion interface 22 includes an expansion port 220 for connecting to an external device 42. Specifically, the port 220 can be, but not limited to, a Universal Serial Bus (USB) port, a Thunderbolt port, a Secure Digital Memory Card (SD card) slot, and a string. Serial Advanced Technology Attachment (SATA) port or audio port (such as 3.5mm audio connection hole). Preferably, the port 220 is a USB port that conforms to the USB Power Delivery specification or the USB Type-C specification.

The external device 42 has a connector (not shown) corresponding to the type of the expansion port 220 and used to connect the expansion port 220. The external device 42 can be, but is not limited to, an input device (such as a keyboard, a mouse, a touchpad, a microphone, or a scanner), an output device (such as a display, a speaker, or a printer), a storage device (such as an external hard drive, and a memory). Card or external CD player) or auxiliary processing device (such as an external sound card or an external graphics card).

It should be noted that, in this embodiment, the expansion interface 22 includes only a single extension port 220, but should not be limited thereto. In other embodiments, the expansion interface 22 can also include a plurality of the expansion ports 220 (shown in FIG. 2), and the plurality of expansion ports 220 can respectively connect the plurality of external devices 42 of the same or different types.

The controller 24 includes at least one connection and holding module 240, a switching module 242, and a processing module 244.

The connection holding module 240 is configured to keep the plurality of first hosts 400 connected to the external device 42. Specifically, the external device 42 can simultaneously connect to the plurality of first hosts 400, but only a single first host 400 can interact with the external device 42 at the same time (ie, only a single first host 400 has the external connection) A control of device 42).

For example, if the external device 42 is a keyboard, and the two wireless devices 2 are connected to the first host 400 (taking a smart phone and a notebook as an example). When the smart phone has the control of the keyboard, only the smart phone can receive a keyboard operation signal from the keyboard, and the notebook computer still does not receive the keyboard although it is still connected to the keyboard. Operation signal; conversely, when the notebook computer has the control right of the keyboard, only the notebook computer can receive the keyboard operation signal, and the smart phone still does not receive the keyboard although it still remains connected with the keyboard. Keyboard operation signal.

Preferably, in order to keep the plurality of first hosts 400 connected to the external device 42, the connection holding module 240 periodically generates and sends a polling signal to each of the first hosts 400 to detect whether Each of the first hosts 400 intends to control the external device 42. Further, since each of the first host 400s periodically receives the polling signal and regards it as a response signal of the external device 42, each of the first hosts 400 will not be detected by detecting the external device 42. The time out does not respond and the connection between the external device 42 is actively interrupted.

The switching module 242 can confirm a connection relationship between the external device 42 and the plurality of first hosts 400 according to a connection table, and switch between the plurality of first hosts 400 connected to the external device 42 according to a switching instruction. This control of the external device 42. Preferably, the switching module 242 is a built-in computer switching module (such as a keyboard, video, and mouse (KVM) switching module).

Specifically, the connection table includes the external device 42 connected to the expansion port 220 and the connection relationship between the plurality of first hosts 400. The connection relationship is used to indicate that the external device 42 is connected (interactive) or disconnected (unable to communicate) with each of the first hosts 400.

Preferably, the connection table further includes a host list, a control list and an external device list. The host list is used to record the plurality of first hosts 400 that are connected to the wireless expander 2 (such as recording an ID code of each of the connected first hosts 400). The list of control rights is used to record which of the first hosts 400 currently has the control of the external device 42. The list of external devices is used to record the (multiple) external devices 42 to which the wireless expander 2 is connected (eg, to record an identification code (ID code) of each connected external device 42). Preferably, the connection table is stored in a memory (not shown) of the wireless expander 2, and the external device 42 and the plurality of first host 400 are set by the host list and the external device list. The connection between the two.

Thereby, the present invention can provide the switching function of the control right of the plurality of external devices 42. Moreover, since the first host 400 having the connection relationship can be connected to the external device 42 at the same time, before the switching of the control right of the external device 42 is performed, the external device 42 does not need to be The first host 400 that has lost control is disconnected, and then establishes a connection with the first host 400 that is about to obtain control, and the control right can be directly switched. Through the above technical means, the present invention can further improve the switching speed of the control right of the plurality of external devices 42 connected to the wireless expander 2.

The processing module 244 is connected to the connection and holding module 240 and the switching module 242. The processing module 244 can receive an external device signal (such as the keyboard operation signal, a mouse operation signal or a microphone audio input signal) from the external device 42 and convert the received external device signal to a wireless host signal. And transmitting to the first host 400 having the control right of the external device 42 according to the connection table.

Alternatively, the processing module 244 can receive the wireless host signal from the first host 400 having the control right of the external device 42 (eg, a manipulation command signal for controlling the external device 42 or corresponding to the first host 400) The current video signal of the display screen converts the wireless host signal to the external device signal and transmits the signal to the external device 42.

Preferably, the first host 400 that receives/transmits the wireless host signal has the control right of the external device 42 that transmits/receives the external device signal.

Automatically converting the external device signal sent by the external device 42 to the wireless host signal compatible with each of the first host 400, and automatically converting the wireless host signal compatible with each of the first host 400 To be compatible with the external device signal of the external device 42, the present invention enables the wireless expander 2 to be compatible with the plurality of first host 400 of different types (e.g., using different operating systems or different computer architectures).

In another embodiment of the present invention, each of the first hosts 400 is respectively configured with a host application, and each of the first hosts 400 establishes the wireless connection with the wireless expander 2 by executing the host application. The connection with the external device 42 is maintained, or the received wireless host signal is converted into a signal format recognizable by each operating system of the first host 400.

In another embodiment of the present invention, the wireless expander 2 further provides an instant scanning function to instantly detect and establish a wireless connection with a new first host (not shown).

Specifically, the controller 24 further includes a scan module 246 connected to the processing module 244. The scanning module 246 can scan a wireless communication range via the wireless host interface 20, and actively scan the new first host when there is an unconnected new first host in the wireless communication range. The host application communicates to establish the wireless connection. After the wireless connection is established, the scanning module 246 can further update the connection table (eg, adding the new first host to the host list and updating the connection relationship). Preferably, the scanning module 246 can detect the new first host when the wireless expander 2 is connected for the first time, and assign the identification code to the new first host for identification (for example, as the new first The code hosted in the list of hosts).

In another embodiment of the present invention, the wireless expander 2 further includes a wired host interface 26 for wiredly connecting at least one second host 402. Specifically, the wired host interface 260 includes at least one host port 260 (such as a USB port), and the wireless expander 2 is physically connected to the second host 402 through the host port 260 and a host transmission line (such as a USB transmission line). .

After the wired host interface 26 is wired to the second host 402, the scanning module 246 can update the connection table (eg, add the second host 402 to the host list and update the connection relationship).

Moreover, when the control of the external device 42 is switched to the second host 402 according to the switching instruction, the processing module 244 can convert the external device signal to a wired host signal, and according to the connection table, The wired host interface 26 transmits the wired host signal to the second host 402 having the control. Alternatively, the processing module 244 can receive the wired host signal from the second host 402 having the control right through the wired host interface 26, and convert the signal to the external device signal, and then transmit the signal to the external device 42.

Therefore, the wireless expander 2 of the present invention can simultaneously connect the plurality of first host 400 and the second host 402 in a wireless manner and a wired manner, thereby further increasing the flexibility in use.

In another embodiment of the present invention, in addition to connecting the wireless expander 2 via the host transmission line, the second host 402 can simultaneously establish a new wireless connection with the wireless host interface 20 of the wireless expander 2 ( The figure is not marked). Thereby, the second host 402 can simultaneously communicate with the wireless expander 2 via the wireless connection and the host transmission line (eg, transmitting the image signal with a larger amount of data via the host transmission line, and transmitting via the wireless connection A control command signal with a small amount of data), thereby achieving load balancing of data transmission, and effectively reducing transmission time and achieving power saving effect.

Similarly, the plurality of first hosts 400 can also communicate with the wireless expander 2 via the wireless connection and the host transmission line. In other words, the first host 400 and the second host 402 can be the same host. In this embodiment, the primary connection is distinguished by a primary connection, but not limited thereto.

In another embodiment of the present invention, the wireless host interface 20 includes a Wi-Fi module 200 and a Bluetooth module 202.

The Wi-Fi module 200 is configured to establish a plurality of Wi-Fi wireless connections with the plurality of first hosts 400, respectively. The Bluetooth module 202 is configured to establish a complex Bluetooth wireless connection with the plurality of first hosts 400, respectively. Specifically, the wireless host interface 20 establishes the Wi-Fi wireless connection and the Bluetooth wireless connection with each of the first host 400s, and simultaneously maintains the Wi-Fi wireless connection and the Bluetooth wireless connection. The wireless connection.

Preferably, the Wi-Fi module 200 is a dual band Wi-Fi module (for example, wireless communication via 2.4 GHz and 5 GHz dual bands), and provides a larger wireless communication bandwidth. . Alternatively, the Wi-Fi module 200 is a Dual Media Access Control address (Dual MAC address) Wi-Fi module that provides a higher internal hardware communication bandwidth. The Bluetooth module is a Multiple Bluetooth module, and the Bluetooth wireless connection can be established simultaneously with the plurality of first hosts 400.

Further, the processing module 244 can automatically select to transmit a signal via the Wi-Fi wireless connection or via the Bluetooth wireless connection in the current transmission according to the type of the signal to be currently transmitted. For example, the processing module 244 can transmit the Bluetooth wireless connection with a smaller bandwidth but more power saving when the external device signal or the wireless host signal is the control command signal or other low data signal. Or receive. Moreover, the processing module 244 can transmit or receive via the Wi-Fi wireless connection with a larger bandwidth when the external device signal or the wireless host signal is the image signal or other high data volume signal.

The invention respectively transmits signals of different data quantities by using the Wi-Fi wireless connection and the Bluetooth wireless connection, thereby effectively reducing transmission time and achieving power saving effect.

In another embodiment of the present invention, the wireless expander 2 further includes a video interface 28 electrically connected to the controller 24. The video interface 28 includes a video output port 280 for wired connection to an external display 44. Preferably, the video output port 280 is a display port, a high definition multimedia interface (HDMI) port, or a video graphics array (VGA) port, but should not be used. limited.

The switching module 242 can treat the video output port 280 as another expansion port 220 and treat the external display 44 as another external device 42 to perform the foregoing switching of the control. The scanning module 246 can update the connection table when scanning the external interface 44 to the video interface 28 (if the external display 44 is added to the external device list and update the connection relationship).

In this embodiment, the processing module 244 can detect that the wireless host signal is a host (such as the first host 400 or the second host 402) having the control right of the external display 44. When the image signal is received, the image signal is transmitted to the external display 44 according to the connection table.

In another embodiment of the present invention, the wireless expander 2 can further provide a network sharer function. Specifically, the wireless expander 2 further includes a network interface 30 electrically connected to the controller 24 for connecting to an Internet 46. Specifically, the network interface 30 includes a network port 300 (such as an RJ45 port), and the network port 300 is connected to an external router via a network cable (as shown in FIG. 4). Router 48) to connect to the Internet 46.

In this embodiment, the controller 24 further includes a network sharing module 248 connected to the processing module 244. The network sharing module 248 can connect the plurality of first hosts 400 to the Internet 46 via the Wi-Fi wireless connection. Preferably, the network sharing module 248 transmits the data signal received from the Internet 46 to the corresponding first host 400 via the Wi-Fi wireless connection, or receives each of the first host 400. The data signal to be sent to the Internet 46.

In other words, each of the first host 400 can connect to the Internet 46 via the Wi-Fi wireless connection, the wireless expander 2, and the path of the network cable.

In another embodiment of the present invention, the wireless expander 2 can further provide a security control function. Specifically, the controller 24 further includes a control module 250 connected to the processing module 244 for controlling all connections of the wireless expander 2.

Preferably, the wireless expander 2 can further include a human interface 32 (such as a button or a touch screen). The control module 250 can receive a password and a control command via the human interface 32, and after verifying that the password is correct (eg, the same as the control password preset by the user), execute the control command to set the connection. Table (such as setting the connection relationship or the list of control rights).

Alternatively, the management module 250 can verify that the password is correct before allowing the host (such as the first host 400 or the second host 402) to connect to the Internet 46 via the wireless expander 2.

Alternatively, the management module 250 can verify that the password is correct, and then the host having the control (such as the first host 400 or the second host 402) transmits the current display screen via the wireless expander 2. Displayed to the external display 44.

It is to be noted that the switching module 242 can also receive the switching instruction input by the user via the human interface 32.

In this embodiment, the switching instruction, the password, and the control instruction are received through the human interface 32, but should not be limited thereto.

In another embodiment of the present invention, the wireless expander 2 receives the switching instruction, the password, and the control instruction from one of the plurality of hosts (eg, the plurality of first host 400 or the second host 402) . Specifically, the host may display an operation interface (such as a Graphical User Interface (GUI) or an On Screen Display (OSD)) in a built-in display for the user to pass through. The switch interface, the password or the control command is input by a host interface of the host.

In another embodiment of the present invention, the wireless expander 2 displays the operation interface in the connected external display 44, and the user can use the external device 42 (such as a keyboard or a mouse) to input. The switching instruction, the password or the control instruction. Thereby, the wireless expander 2 can save the setting of the human machine interface 32.

It is to be noted that the connection holding module 240, the switching module 242, the processing module 244, the scanning module 246, the network sharing module 248, and the management module 250 can be connected via a hardware module. The implementation of the method (such as an electronic circuit or a built-in circuit of a programmed digital circuit) can also be implemented via a software module (such as a firmware, a program, or an Application Programming Interface (API)). , but should not be limited by this. When the aforementioned modules are implemented via a software module, the connection between the aforementioned modules refers to a link between the program modules.

Referring to FIG. 3, FIG. 3 is a structural diagram of a wireless expander with a switching function according to a second embodiment of the present invention. The components of the wireless expander 2 shown in FIG. 3 are substantially the same as those of the wireless expander 2 shown in FIG. 2, and details are not described herein again. The wireless expander 2 of the present embodiment is mainly different from the wireless expander 2 of the first embodiment as follows.

In this embodiment, the expansion interface 22 includes a plurality of the expansion connection ports 220 for respectively connecting a plurality of the external devices 42. The plurality of extension ports 220 may be the same or different types of ports.

The wireless expander 2 omits the setting of the wired host interface 26. Moreover, the video interface 28 further includes at least one video input port 282 for wiredly connecting at least one third host 404. Preferably, the video output port 280 is a DisplayPort port, an HDMI port or a VGA port, but should not be limited thereto. Preferably, the video input port 282 is connected to the third host 404 via a video transmission line (such as an MHL-HDMI transmission line).

After the video input port 282 is wired to the third host 404, the scan module 246 can update the connection table (eg, add the third host 404 to the host list and update the connection relationship).

The processing module 244 can receive a wired host video signal corresponding to the current display screen of the third host 404 from the third host 404 via the video input port 282 and transmit the image to the external display 44 for display.

Preferably, the processing module 244 is configured to transmit the host cable when the third host 404 connected to the video input port 282 has the control right of the external display 44 according to the control list of the connection table. The image signal is displayed to the external display 44.

In this embodiment, the third host 404 can further establish a new wireless connection with the wireless host interface 20. Thereby, the third host 404 can simultaneously communicate with the wireless expander 2 via the video transmission line and the wireless connection (eg, transmitting the image signal via the video transmission line, and transmitting the manipulation command signal via the wireless connection), To improve the signal transmission rate.

Similarly, the plurality of first hosts 400 can simultaneously communicate with the wireless expander 2 via the wireless connection and the video transmission line. In other words, the first host 400 and the third host 404 can be the same host. In this embodiment, the primary connection is distinguished, but not limited thereto.

Furthermore, in another embodiment of the present invention, the wireless expander 2 can also include the Wi-Fi module 200, the Bluetooth module 202, and the host port 260 shown in FIG. 2 and FIG. The video input port 282 is connected to the plurality of first hosts 400, the second host 402, and the third host 404 by various connection methods, and is not limited.

Continuing to refer to FIG. 4 and FIG. 5, FIG. 4 is a schematic diagram of the use of a wireless expander with a switching function according to the first embodiment of the present invention, and FIG. 5 is a schematic diagram of a connection table according to the first embodiment of the present invention.

In this embodiment, the wireless expander 2 wirelessly connects a smart phone 400a and a smart watch 400b via an antenna 34 (for example, through the Wi-Fi module 220 and the Bluetooth module 202), and A notebook computer 402a is wired (e.g., via the host port 260 to the video input port 282).

In addition, the wireless expander 2 is simultaneously connected to a keyboard 42a, a mouse 42b (for example, through the plurality of expansion ports 220), and a liquid crystal display 44a (for example, through the video output port 280). Also, the wireless expander 2 connects to the Internet 46 via a connection to the router 48 (e.g., via the network connection 埠 300).

The user can view the connection table via the smart phone 400a, the smart watch 400b or a display screen of the notebook computer 402a or via the liquid crystal display 44a (as shown in FIG. 5, thereby using the wisdom This display screen of the mobile phone 400a views the connection table as an example).

Taking the connection table shown in FIG. 5 as an example, the user can know that the smart phone 400a has been connected to the liquid crystal display 44a, the keyboard 42a and the mouse 42b, and the liquid crystal display 44a. The control (ie, the liquid crystal display 44a currently displays the display screen of the smart phone 400a), and can be connected to the Internet 46 via the wireless expander 2; the notebook computer 402a is connected to the liquid crystal display 44a, The keyboard 42a and the mouse 42b have the control right of the keyboard 42a and the mouse 42b (that is, the external device signals generated by the keyboard 42a and the mouse 42b are transmitted to the notebook computer 402a) And being connected to the Internet 46 via the wireless expander 2; the smart watch 400b is connected to the liquid crystal display 44a, does not have control of the liquid crystal display 44a, and is not connectable to the wireless expander 2 via the wireless expander 2 Internet 46.

Further, the user can operate the smart phone 400a to generate the switching instruction to perform the control right switching (such as switching the control right of the liquid crystal display 44a from the smart phone 400a to the smart watch 400b. ). Moreover, the user can also operate the smart phone 400a to input the password and the control command to modify the connection relationship of the connection table.

The above is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Therefore, equivalent changes to the scope of the present invention are included in the scope of the present invention. Bright.

10‧‧‧Expansion

100‧‧‧Host connection埠

102a-102d‧‧‧Expansion link埠

104‧‧‧ Controller

12‧‧‧Host

120‧‧‧Connector

140‧‧‧ keyboard

142‧‧‧ Mouse

144‧‧‧External hard drive

146‧‧‧External display

2‧‧‧Wireless expander

20‧‧‧Wireless Host Interface

200‧‧ Wi-Fi module

202‧‧‧Bluetooth Module

22‧‧‧Expansion interface

220‧‧‧Expansion link埠

24‧‧‧ Controller

240‧‧‧Connected Holder Module

242‧‧‧Switch Module

244‧‧‧Processing module

246‧‧‧ scan module

248‧‧‧Network Sharing Module

250‧‧‧Control module

26‧‧‧Wired Host Interface

260‧‧‧Host connection埠

28‧‧‧Video interface

280‧‧‧Video output port埠

282‧‧•Video Input Port埠

30‧‧‧Internet interface

300‧‧‧Internet connection埠

32‧‧‧Human Machine Interface

34‧‧‧Antenna

400‧‧‧First host

400a‧‧‧Smart Phone

400b‧‧‧Smart Watch

402‧‧‧Second host

402a‧‧‧Note Computer

403‧‧‧ third host

42‧‧‧External devices

42a‧‧‧ keyboard

42b‧‧‧mouse

44‧‧‧External display

44a‧‧‧LCD display

46‧‧‧Internet

48‧‧‧ router

Figure 1 is a diagram of a conventional expander architecture.

2 is a structural diagram of a wireless expander with a switching function according to a first embodiment of the present invention.

FIG. 3 is a structural diagram of a wireless expander with a switching function according to a second embodiment of the present invention.

FIG. 4 is a schematic diagram of the use of a wireless expander with a switching function according to a first embodiment of the present invention.

Figure 5 is a schematic view of a connection table in accordance with a first embodiment of the present invention.

2‧‧‧Wireless expander

20‧‧‧Wireless Host Interface

200‧‧ Wi-Fi module

202‧‧‧Bluetooth Module

22‧‧‧Expansion interface

220‧‧‧Expansion link埠

24‧‧‧ Controller

240‧‧‧Connected Holder Module

242‧‧‧Switch Module

244‧‧‧Processing module

246‧‧‧ scan module

248‧‧‧Network Sharing Module

250‧‧‧Control module

26‧‧‧Wired Host Interface

260‧‧‧Host connection埠

28‧‧‧Video interface

280‧‧‧Video output port埠

30‧‧‧Internet interface

300‧‧‧Internet connection埠

32‧‧‧Human Machine Interface

400‧‧‧First host

402‧‧‧Second host

42‧‧‧External devices

44‧‧‧External display

46‧‧‧Internet

Claims (15)

A wireless expansion device with a switching function includes: an expansion interface for connecting an external device; a wireless host interface for establishing a plurality of wireless connections with the plurality of hosts; and a controller electrically connecting the expansion interface and The wireless host interface includes: a switching module, confirming a connection relationship between the external device and the plurality of hosts according to a connection table, and switching a control right of the external device to the external device according to a switching instruction Each of the hosts; a connection holding module, wherein the host connected to the external device is connected to the external device according to the connection table; and a processing module, connecting the switching module and the connection holding module, converting An external device signal received from the external device is a wireless host signal and transmitted to the host having the control right, or the wireless host signal received from the host having the control right is the external device signal, and transmitted To the external device. The wireless expander with a switching function as claimed in claim 1, wherein the connection holding module periodically sends a polling signal to each host connected to the external device to prevent each host from being connected to the external device. If the timeout does not respond, the connection to the external device is broken. The wireless expander with a switching function as claimed in claim 1, wherein the controller further includes a scanning module, and the processing module is connected to the unconnected new host through the wireless host interface, and the The new host establishes the wireless connection and updates the connection table. The wireless expander with a switching function as claimed in claim 1, further comprising a wired host interface for wired connection to another host; the processing module having the external device connected to the host connected via the wired host interface In the case of the control, the external device signal is converted to a wired host signal, and transmitted to the host, or the wired host signal received from the host having the control right is the external device signal, and transmitted to the external device. . The wireless expander with a switching function as described in claim 1, wherein the wireless host interface comprises: a Wi-Fi module for establishing a Wi-Fi wireless connection with the plurality of hosts; and a Bluetooth module And establishing a Bluetooth wireless connection with the plurality of hosts respectively; wherein the wireless host interface establishes the Wi-Fi wireless connection and the Bluetooth wireless connection with each host at the same time. The wireless expander with a switching function as claimed in claim 5, wherein the Wi-Fi module is a dual-band Wi-Fi module or a dual-access address Wi-Fi module, and the Bluetooth module is a composite Bluetooth module. The wireless expander with the switching function as described in claim 5, further comprising a network interface electrically connected to the controller for connecting to an internet network; the controller further comprising a network sharing module, The processing module is connected to connect the plurality of hosts to the internet via a plurality of Wi-Fi wireless connections. The wireless expander with a switching function according to claim 7, wherein the processing module transmits/receives the manipulation command via the Bluetooth wireless connection when the external device signal or the wireless host signal is a manipulation command signal The signal transmits/receives the image signal via the Wi-Fi wireless connection when the external device signal or the wireless host signal is an image signal. The wireless expander with a switching function as claimed in claim 1, further comprising a video interface electrically connected to the controller, the video interface comprising a video output port for wiredly connecting an external display; the processing module When the wireless host signal received by the host having the control of the external display is an image signal, the image signal is transmitted to the external display. The wireless expansion device of the switching function of claim 9, wherein the video interface further comprises a video input port for wiredly connecting one of the plurality of hosts; the processing module is connected via the video input port. When the connected host has the control right of the external display, a wired host video signal is received from the host via the video input connection, and the wired host video signal is transmitted to the external display according to the connection table. The wireless expander with a switching function as claimed in claim 10, wherein the video input is connected to an HDMI port and connected to the host via an MHL-HDMI transmission line. The wireless expander with a switching function as claimed in claim 1, wherein the controller further includes a control module connected to the processing module for receiving a password and a control command, and after verifying that the password is correct, The connection relationship of the connection table is set according to the control command. The wireless expander with a switching function as claimed in claim 12, further comprising a human machine interface, electrically connected to the controller, accepting a switching operation and generating a corresponding switching instruction, or accepting a password input for inputting the password Operate and input a control operation of the control command. The wireless expander with the switching function of claim 1, wherein the expansion interface comprises a plurality of expansion ports for connecting the plurality of external devices, and at least one of the plurality of expansion ports is a USB port. The wireless expander with a switching function as claimed in claim 14, wherein the connection table includes a host list for recording the plurality of hosts connected to the wireless expander, and the plurality of connected to the wireless expander is recorded. a list of external devices of the external device, a plurality of connection relationships between the external device and the plurality of hosts, and a control list for each of the hosts for recording the control rights currently held by each of the external devices.