Control Method for Wireless Projection and Control System for Wireless Projection

Abstract

The present invention provides a control method for wireless projection and a control system for wireless projection. The control method includes setting at least one operation limit; a transmitting device communicating with a receiving device or a communication device so that the transmitting device or the receiving device performs at least one restricted operation; and after the transmitting device or the receiving device performs at least one restricted operation, the receiving device selectively or restrictedly projects an image signal onto a display device. The transmitting device is used to selectively transmit the image signal generated by the communication device to the receiving device according to at least one operation limit.

Description

Technical Field

[0001] The present invention relates to a control method for wireless projection and a control system for wireless projection, and particularly to a control method for wireless projection and a control system for wireless projection that use highly secure key data to transmit data with different permission settings. Background Art

[0002] With the rapid development of technology, various projector systems and conference reporting systems have been rapidly developed and are also applied in daily life. The conference reporting system can be combined with the projector system to increase the convenience of the presenter when presenting data. Most current conference reporting systems mainly use wireless communication for data transmission. The wireless communication data transmission method can be divided into two modes. In the first mode, the computers used by the members participating in the conference must install specific software, and the computer can identify devices such as hard disks, Universal Serial Bus (USB), or CD-ROMs. Then, the data in the above physical or virtual storage devices is transmitted to the screen or display through the wireless network. In the second mode, the computers used by the members participating in the conference can be connected to the transmission device. When the transmission device establishes a connection with the screen or display through the receiving device, the data in the computer can be projected onto the screen or display. In recent years, using the wireless communication data transmission method for conference reporting can increase operation efficiency and convenience.

[0003] However, as mentioned above, to perform wireless communication data transmission, the condition is that specific software needs to be installed in the computer, or a paired transmission device and receiving device need to establish a connection. Installing specific software in the computer may pose a risk of data theft. For example, the computer can install specific software to generate key data with an authorization sharing function. However, if the computer is hacked, the key data with the authorization sharing function may be stolen, and the security of the conference data will be threatened. Therefore, developing a conference system that uses highly secure key data to transmit data with different permission settings is indeed an important issue. Summary of the Invention

[0004] The purpose of the present invention is to provide a control method for wireless projection and a control system for wireless projection.

[0005] An embodiment of the present invention provides a control method for wireless projection. The control method for wireless projection includes setting at least one operation limit, the transmitting device communicating with the receiving device or the communication device so that the transmitting device or the receiving device performs at least one restricted operation, and after the transmitting device or the receiving device performs at least one restricted operation, the receiving device selectively or restrictedly projects the video signal onto the display device. The transmitting device is used to selectively transmit the video signal generated by the communication device to the receiving device according to at least one operation limit.

[0006] Specifically, the transmitting device communicating with the receiving device or the communication device so that the transmitting device or the receiving device performs the at least one restricted operation includes: the receiving device transmitting a control signal of the first permission level to the transmitting device; and after the transmitting device receives the control signal from the receiving device, performing at least one first operation limit according to the first permission level.

[0007] Specifically, the transmitting device communicating with the receiving device or the communication device so that the transmitting device or the receiving device performs the at least one restricted operation includes: after the transmitting device is triggered, the transmitting device transmits the video signal to the receiving device; and the receiving device controls the display device to display the video signal with at least one second operation limit according to the second permission level; wherein the second permission level is set in the transmitting device or the receiving device.

[0008] Specifically, the transmitting device communicating with the receiving device or the communication device so that the transmitting device or the receiving device performs the at least one restricted operation includes: the communication device receiving an event message of the receiving device through the transmitting device having the third permission level; wherein if the third permission level increases, the communication device reduces at least one third operation limit for forwarding the event message to at least one other transmitting device, and if the third permission level decreases, the communication device increases at least one third operation limit for forwarding the event message to the at least one other transmitting device.

[0009] Specifically, the transmitting device communicating with the receiving device or the communication device so that the transmitting device or the receiving device performs the at least one restricted operation includes: the communication device setting the fourth permission level so that when the communication device transmits the video signal to the receiving device through the transmitting device, the display device displays the video signal with at least one fourth operation limit.

[0010] Specifically, the method further includes: establishing a member list stored in the receiving device; and the receiving device reading the member list so that the communication device obtains at least one permission level according to the member list; wherein the data of the at least one permission level is stored in the communication device.

[0011] Specifically, the method further includes: the receiving device obtaining a member list from a cloud server; and the receiving device reading the member list so that the communication device obtains at least one permission level according to the member list; wherein the data of the at least one permission level is stored in the cloud server.

[0012] Specifically, the receiving device of the method has a member list, and the member list is determined according to the conference notification group letter data, the group list data of the communication application, and / or the member list data of the communication database.

[0013] Specifically, in the method, the at least one restricted operation includes the timeliness of operating the meeting scheduling time, and if the timeliness expires, the meeting sharing data loses authorization.

[0014] Specifically, the method includes that after the communication device establishes a connection with the transmitting device, the transmitting device transmits extended display capability identification data to a data processing device in the communication device; and after the data processing device receives the extended display capability identification data, the data processing device identifies the transmitting device as a virtual display device according to the extended display capability identification data, so as to transmit the video signal to the transmitting device for wireless communication.

[0015] Another embodiment of the present invention provides a control system for wireless projection. The control system for wireless projection includes a receiving device, a communication device, a transmitting device, and a display device. The transmitting device establishes a connection with the receiving device or the communication device. The display device is coupled to the receiving device for displaying an image. After at least one operation restriction is set, the transmitting device communicates with the receiving device or the communication device so that the transmitting device or the receiving device performs at least one restricted operation. After the transmitting device or the receiving device performs at least one restricted operation, the receiving device selectively or restrictedly projects the video signal onto the display device. The transmitting device is used to selectively transmit the video signal generated by the communication device to the receiving device according to at least one operation restriction.

[0016] It is characterized in that the receiving device transmits a control signal of a first permission level to the transmitting device, and after the transmitting device receives the control signal from the receiving device, it performs at least one first operation restriction according to the first permission level.

[0017] Preferably, after the transmitting device is triggered, the transmitting device transmits the video signal to the receiving device, and the receiving device controls the display device to display the video signal with at least one second operation restriction according to a second permission level, and the second permission level is set in the transmitting device or the receiving device.

[0018] Preferably, the communication device receives the event message of the receiving device through the transmitting device with the third permission level. If the third permission level increases, the communication device reduces at least one third operation limit for transmitting the event message to at least one other transmitting device. And if the third permission level decreases, the communication device increases at least one third operation limit for transmitting the event message to the at least one other transmitting device.

[0019] Preferably, the communication device sets a fourth permission level so that when the communication device transmits the video signal to the receiving device through the transmitting device, the display device displays the video signal with at least one fourth operation limit.

[0020] Preferably, the receiving device stores a member list. The receiving device reads the member list so that the communication device obtains at least one permission level according to the member list, and the data of the at least one permission level is stored in the communication device.

[0021] Preferably, the receiving device obtains the member list from the cloud server. The receiving device reads the member list so that the communication device obtains at least one permission level according to the member list, and the data of the at least one permission level is stored in the cloud server.

[0022] Preferably, the receiving device has a member list, and the member list is determined according to the meeting notice group letter data, the group list data of the communication application, and / or the member list data of the communication database.

[0023] Preferably, the at least one restricted operation includes the timeliness of operating the meeting schedule time. And if the timeliness expires, the meeting sharing data loses authorization.

[0024] Preferably, after the communication device establishes a connection with the transmitting device, the transmitting device transmits the extended display capability identification data to the data processing device in the communication device. And after the data processing device receives the extended display capability identification data, the data processing device identifies the transmitting device as a virtual display device according to the extended display capability identification data to transmit the video signal to the transmitting device for wireless communication.

[0025] Compared with the prior art, the present invention describes a control method for wireless projection and a control system for wireless projection. The control system for wireless projection can support remote meeting data sharing; and the control system for wireless projection can also customize and limit the permissions of some projected data. Therefore, compared with the traditional method of generating key data by using an application program in a computer, the control system for wireless projection of the present invention can increase the information security level and provide operations with various permission settings. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A block diagram of an embodiment of the control system for wireless projection of the present invention.

[0027] Figure 2 is Figure 1 A schematic diagram showing the receiving device transmitting data to the transmitting device through a data path in the wireless projection control system of

[0028] Figure 3 is Figure 1 A schematic diagram showing the transmitting device transmitting data to the receiving device through a data path in the wireless projection control system of

[0029] Figure 4 is Figure 1 A schematic diagram showing the transmitting device transmitting data to the communication device through a data path in the wireless projection control system of

[0030] Figure 5 is Figure 1 A schematic diagram showing the communication device transmitting data to the transmitting device through a data path in the wireless projection control system of

[0031] Figure 6A is Figure 1 A schematic diagram of the first appearance of the transmitting device in the wireless projection control system of

[0032] Figure 6B is Figure 1 A schematic diagram of the second appearance of the transmitting device in the wireless projection control system of

[0033] Figure 7 is Figure 1 A flowchart of the control method for wireless projection executed by the wireless projection control system of Detailed implementation manners

[0034] To further understand the purpose, structure, features and functions of the present invention, the following is a detailed description in conjunction with embodiments.

[0035] Figure 1FIG. 0 is a block diagram of an embodiment of a wireless projection control system 100 of the present invention. The wireless projection control system 100 can be applied to conference reports and remote data sharing. However, the application of the wireless projection control system 100 is not limited thereto. The wireless projection control system 100 includes a receiving device RX, a communication device NB, a transmitting device TX, and a display device 13. The receiving device RX has data receiving capabilities and supports wireless or wired communication. The receiving device RX includes a transceiver 10, a processor 11, and a memory 12. The processor 11 is coupled to the transceiver 10 and the memory 12 for controlling the transceiver 10 and the memory 12. The processor 11 can be any form of processing chip or programmable computing unit. The communication device NB can be a device with data processing and communication capabilities, such as a desktop computer, a notebook computer, a smart phone, or a tablet computer. The transmitting device TX establishes a connection with the receiving device RX and / or the communication device NB. For example, a connection L can be established between the transmitting device TX and the communication device NB using the specifications of the Universal Serial Bus (USB) or the USB-Type C. The display device 13 is coupled to the receiving device RX for displaying images. The display device 13 can be any form of display, such as a Liquid-Crystal Display (LCD) or an Organic Light-Emitting Diode (OLED) display, etc. In the wireless projection control system 100, after at least one operation limit is set, the transmitting device TX communicates with the receiving device RX or the communication device NB so that the transmitting device TX or the receiving device RX performs at least one restricted operation. And, after the transmitting device TX or the receiving device RX performs at least one restricted operation, the receiving device RX can selectively or restrictedly project an image signal onto the display device 13. The transmitting device TX is used to selectively transmit the image signal generated by the communication device NB to the receiving device RX according to at least one operation limit. In short, the communication between the transmitting device TX and the receiving device RX or the communication device NB in the wireless projection control system 100 can include the following modes: (A) the transmitting device TX transmits data to the receiving device RX, (B) the receiving device RX transmits data to the transmitting device TX, (C) the transmitting device TX transmits data to the communication device NB, (D) the communication device NB transmits data to the transmitting device TX. The wireless projection control system 100 can increase the information security level and provide various permission-setting operations by using the above four communication modes. The details of the four communication modes of the wireless projection control system 100 will be described in detail later.

[0036] Figure 2In the control system 100 for wireless projection, a schematic diagram of the receiving device RX transmitting data to the transmitting device TX through the data path F1. In Figure 2 , the receiving device RX transmits a control signal with a first privilege level to the transmitting device TX through the data path F1. And, after receiving the control signal from the receiving device RX, the transmitting device TX can perform at least one first operation restriction according to the first privilege level. Also, the first privilege level can be set in the receiving device RX to reduce the probability of being stolen by data thieves. In other words, in Figure 2 , the communication mode between the receiving device RX and the transmitting device TX is: the receiving device RX transmits data and the transmitting device TX receives data. The data path F1 can belong to the first network NET1. The first network NET1 can be a wireless network, such as a Wi-Fi network. The control signal generated by the receiving device RX can also carry key data. The transmitting device can transmit the key data to the communication device NB or to remote users (such as meeting members M1 to M3) for data sharing. In Figure 2 , since the receiving device RX can generate a control signal with key data, the security level is higher compared to the key data directly generated by a computer using software.

[0037] Figure 3 In the control system 100 for wireless projection, a schematic diagram of the transmitting device TX transmitting data to the receiving device through the data path F2. In Figure 3 , after the transmitting device TX is triggered, the transmitting device TX transmits an image signal to the receiving device RX. The receiving device RX controls the display device 13 to display the image signal with at least one second operation restriction according to the second privilege level. Also, the second privilege level can be set in the transmitting device TX or the receiving device RX to reduce the probability of being stolen by data thieves. In other words, in Figure 3 , the communication mode between the receiving device RX and the transmitting device TX is: the transmitting device TX transmits data and the receiving device RX receives data. The data path F2 can belong to the first network NET1. The first network NET1 can be a wireless network, such as a Wi-Fi network. The receiving device RX can also set key data. The receiving device RX can also selectively display the image signal on the display device 13 according to the key data. Similarly, in Figure 3 , since the receiving device RX can generate key data, the security level is higher compared to the key data directly generated by a computer using software.

[0038] Figure 4 In the control system 100 for wireless projection, a schematic diagram of the transmitting device TX transmitting data to the communication device NB through the data path F3. In Figure 4In it, the communication device NB can receive the event message of the receiving device RX through the transmitting device TX with the third privilege level. In other words, Figure 4 the transmitting device TX of Figure 4 itself has a privilege level and has the function of relaying data. In Figure 4 the communication mode between the transmitting device TX and the communication device NB is that the transmitting device TX transmits data and the communication device NB receives data. Also, the receiving device RX can set key data and transmit the key data to the communication device NB through the transmitting device TX. Similarly, in Figure 4 since the receiving device RX can generate key data, its security level is higher compared to the key data directly generated by a computer using software. And after the communication device NB receives data, it can, according to the third privilege level, transmit the data to at least one of the transmitting devices TX1 to TX3 used by the remote conference members M1 to M3. In other words, in

[0039] Figure 5 is a schematic diagram of the communication device NB transmitting data to the transmitting device TX through the data path F4 in the wireless projection control system 100. In Figure 5 the communication device NB can set a fourth privilege level so that when the communication device NB transmits an image signal to the receiving device RX through the transmitting device TX, the display device 13 can display the image signal with at least one fourth operation limit. In Figure 5 the communication mode between the transmitting device TX and the communication device NB is that the communication device NB transmits data and the transmitting device TX receives data. The communication device NB can generate key data. In other words, the key data generated by the communication device NB can be transmitted to the transmitting device TX and the receiving device RX. Although there are some information security risks in generating key data by the communication device NB, the wireless projection control system 100 can also operate in this communication mode to increase the convenience of setting.

[0040] In the foregoing Figures 2 to 5Among them, four communication modes introduce a first permission level, a second permission level, a third permission level, a fourth permission level, at least one first operation restriction, at least one second operation restriction, at least one third operation restriction, and at least one fourth operation restriction. Examples in actual situations are as follows. For example, in the communication mode: "The receiving device RX transmits data and the transmitting device TX receives data", the receiving device RX can set the transmitting device TX to set the screen mirroring operation to the off state from 2 pm to 3 pm, or set a certain connected transmitting device to set the screen mirroring operation to the off state from 3 pm to 4 pm. For example, in the communication mode: "The transmitting device TX transmits data and the receiving device RX receives data", the permission setting can set the transmitting device TX to obscure part of the projection screen (or obscure sensitive content), or mask part of the recognized text content output by a certain connected transmitting device. Or, if the receiving device RX is connected to multiple display devices 13, it can also mask the display content of some display devices 13 and open the display content of some display devices 13. For example, in the communication mode: "The transmitting device TX transmits data and the communication device NB receives data", if the permission of the transmitting device TX is high, the data (including key data, permission data, video data) transmitted to the remote conference members M1 to M3 through the communication device NB can be available all the time. On the contrary, if the permission of the transmitting device TX is low, the data (including key data, permission data, video data) transmitted to the remote conference members M1 to M3 through the communication device NB can only be available during a specific period. For example, in the communication mode: "The communication device NB transmits data and the transmitting device TX receives data", the communication device NB can set the transmitting device TX to change the screen mirroring operation to the off state from 2 pm to 3 pm, or set a certain connected transmitting device to change the screen mirroring operation to the off state from 3 pm to 4 pm. However, the present invention is not limited to the above four modes and their applications, and any reasonable technical changes fall within the scope disclosed by the present invention.

[0041] Moreover, the receiving device RX can store the member list. The receiving device RX can read the member list so that the communication device NB can obtain at least one permission level according to the member list. And the data of at least one permission level is stored in the communication device NB. However, the receiving device RX can obtain the member list in any way. For example, the receiving device RX can obtain the member list from the cloud server. The receiving device RX reads the member list so that the communication device NB can obtain at least one permission level according to the member list. And the data of at least one permission level can be stored in the cloud server. The above-mentioned "member list" can be determined according to the group letter data of the meeting notice, the group list data of the communication application, and / or the member list data of the communication database. In other words, the member list can be the preset personal data of the meeting participants. The member list can also be dynamically changed during the meeting. And the aforementioned "key" data can be time-sensitive key data. The key data can be synchronized with the receiving device RX through the third network NET3. In other words, the receiving device RX performing at least one restricted operation according to the key data can be defined as the receiving device RX performing an operation at the time-scheduled time of the time-sensitive meeting schedule. If the time limit expires, the meeting sharing data will lose authorization.

[0042] Moreover, in the wireless projection control system 100, each transmitting device can be regarded as a virtual display device, as described below. For example, when the transmitting device TX is coupled to the communication device NB through the link L, the transmitting device TX can transmit Extended Display Identification Data (EDID) to the data processing device in the communication device NB (such as the central processing unit or the display card in the notebook computer). And after the data processing device receives the extended display capability identification data, the data processing device identifies the transmitting device TX as a virtual display device according to the extended display capability identification data. After the transmitting device TX is identified as a virtual display device, the transmitting device TX can obtain an image signal and transmit it to the receiving device RX. The receiving device RX can then control the display device 13 to project an image according to the image signal of the communication device NB.

[0043] Figure 6A It is a schematic diagram of the first appearance of the transmitting device TX in the wireless projection control system 100. Figure 6B It is a schematic diagram of the second appearance of the transmitting device TX in the wireless projection control system 100. To avoid confusion, Figure 6A the transmitting device in it is hereinafter referred to as the transmitting device TX100. Figure 6B the transmitting device in it is hereinafter referred to as the transmitting device TX200. As Figure 6A and Figure 6BAs shown, the transmission device TX100 and the transmission device TX200 have a button BUT. The button BUT can be regarded as a start key to trigger the wireless pairing program. The button BUT can also be regarded as a control key to trigger the transmission of the video signal to the receiving device RX. For example, after the transmission device TX100 has been paired with the receiving device RX and a connection has been established, when the user presses the button BUT, the transmission device TX100 can transmit the video signal to the receiving device RX. The receiving device RX can control the display device 13 to project the video according to the video signal. And, as mentioned above, the transmission device can be connected to a corresponding video data source (such as a notebook computer). Therefore, the transmission device can have at least one data transmission port. For example, the transmission device TX100 can be connected to a corresponding video data source by using a transmission port USB of the A type universal serial bus (USB Type-A) and / or a transmission port HDMI of the High Definition Multimedia Interface (HDMI). The transmission device TX200 can be connected to a corresponding video data source by using a transmission port TYC of the C type universal serial bus (USB Type-C). However, the embodiments of the present invention are not limited thereto, and any reasonable changes in the cable length, transmission port specifications, and device appearance of the transmission device belong to the scope disclosed by the present invention.

[0044] Figure 7 For Figure 1 the wireless projection control system 100, a flowchart of the wireless projection control method is executed. The wireless projection control method may include steps S701 to S703. Any reasonable step change or technical replacement belongs to the scope disclosed by the present invention. Steps S701 to S703 are described below:

[0045] Step S701: Set at least one operation limit;

[0046] Step S702: The transmission device TX communicates with the receiving device RX or the communication device NB so that the transmission device TX or the receiving device RX performs at least one restricted operation;

[0047] Step S703: After the transmission device TX or the receiving device RX performs at least one restricted operation, the receiving device RX selectively or restrictedly projects the video signal onto the display device 13.

[0048] In the control system 100 for wireless projection, since the transmission device can communicate with the receiving device or the communication device, and the transmission device or the receiving device can set the permission data corresponding to at least one operation limit. The receiving device can also transfer the key data to the communication device through the transmission device. Therefore, in addition to supporting the function of remote data sharing, the control system for wireless projection can also customize the permission for some of the projected data (such as browsing permission, access permission, etc.). Moreover, the key data of the control system 100 for wireless projection can be set by the receiving device, rather than being generated by the application program of the communication device (such as a computer). Therefore, the control system 100 for wireless projection can improve the information security level. Of course, the control system 200 for wireless projection is also applicable to this method, which will not be elaborated here.

[0049] Specifically, the transmission device communicates with the receiving device or the communication device to enable the transmission device or the receiving device to perform the at least one restricted operation, including:

[0050] The receiving device transmits a control signal of the first permission level to the transmission device; and

[0051] After receiving the control signal from the receiving device, the transmission device performs at least one first operation limit according to the first permission level.

[0052] Specifically, the transmission device communicates with the receiving device or the communication device to enable the transmission device or the receiving device to perform the at least one restricted operation, including:

[0053] After being triggered, the transmission device transmits the video signal to the receiving device; and

[0054] The receiving device controls the display device to display the video signal with at least one second operation limit according to the second permission level;

[0055] Wherein the second permission level is set in the transmission device or the receiving device.

[0056] Specifically, the transmission device communicates with the receiving device or the communication device to enable the transmission device or the receiving device to perform the at least one restricted operation, including:

[0057] The communication device receives the event message of the receiving device through the transmission device having the third permission level;

[0058] Wherein if the third permission level increases, the communication device transfers the event message to at least one third operation limit of at least one other transmission device is reduced, and if the third permission level decreases, the communication device transfers the event message to at least one third operation limit of the at least one other transmission device is increased.

[0059] Specifically, the transmission device communicates with the receiving device or the communication device so that the transmission device or the receiving device performs the at least one restricted operation, including:

[0060] The communication device sets a fourth permission level so that when the communication device transmits the video signal to the receiving device through the transmission device, the display device displays the video signal with at least one fourth operation restriction.

[0061] Specifically, the method further includes: establishing a member list stored in the receiving device; and the receiving device reads the member list so that the communication device obtains at least one permission level according to the member list;

[0062] Wherein the data of the at least one permission level is stored in the communication device.

[0063] Specifically, the method further includes: the receiving device obtains a member list from a cloud server; and

[0064] The receiving device reads the member list so that the communication device obtains at least one permission level according to the member list; wherein the data of the at least one permission level is stored in the cloud server.

[0065] Specifically, the receiving device of the method has a member list, and the member list is determined according to the meeting notice group letter data, the group list data of the communication application, and / or the member list data of the communication database.

[0066] Specifically, the at least one restricted operation of the method includes the timeliness of operating the meeting schedule time, and if the timeliness expires, the meeting sharing data loses authorization.

[0067] Specifically, the method includes that after the communication device establishes a connection with the transmission device, the transmission device transmits extended display capability identification data to the data processing device in the communication device; and after the data processing device receives the extended display capability identification data, the data processing device identifies the transmission device as a virtual display device according to the extended display capability identification data to transmit the video signal to the transmission device for wireless communication.

[0068] In summary, the present invention describes a control method for wireless projection and a control system for wireless projection. The control system for wireless projection can support remote conference data sharing. Moreover, the control system for wireless projection can also customize and limit the permissions of some of the projected data. Additionally, the key data of the control system for wireless projection can be set by the receiving device or automatically generated by the receiving device. Therefore, compared with the conventional method of generating key data using an application program in a computer, the control system for wireless projection of the present invention will have higher data security.

[0069] The present invention has been described by the above related embodiments. However, the above embodiments are only examples for implementing the present invention. It must be pointed out that the disclosed embodiments do not limit the scope of the present invention. On the contrary, modifications and refinements made without departing from the spirit and scope of the present invention fall within the scope of patent protection of the present invention.

Claims

1. A control method for wireless projection, characterized in that, Comprising: Providing a transmission device, a receiving device, and a communication device, and setting at least one operation limit for one of the transmission device, the receiving device, and the communication device; The transmission device communicates with the receiving device or the communication device so that the transmission device or the receiving device performs at least one restricted operation; and After the transmission device or the receiving device performs the at least one restricted operation, the receiving device selectively or restrictedly projects an image signal onto a display device; Wherein the transmission device selectively transmits the image signal generated by the communication device to the receiving device according to the at least one operation limit; Wherein the transmission device communicates with the receiving device or the communication device so that the transmission device or the receiving device performs the at least one restricted operation includes: The communication device receives an event message of the receiving device through the transmission device having a third permission level; Wherein if the third permission level increases, at least one third operation limit for the communication device to forward the event message to at least one other transmission device is decreased, and if the third permission level decreases, at least one third operation limit for the communication device to forward the event message to the at least one other transmission device is increased.

2. The method according to claim 1, characterized in that, The transmission device communicates with the receiving device or the communication device so that the transmission device or the receiving device performs the at least one restricted operation includes: The receiving device transmits a control signal of a first permission level to the transmission device; and After receiving the control signal by the transmission device, the transmission device performs at least one first operation limit according to the first permission level.

3. The method according to claim 1, wherein The transmission device communicates with the receiving device or the communication device so that the transmission device or the receiving device performs the at least one restricted operation includes: After the transmission device is triggered, the transmission device transmits the image signal to the receiving device; and The receiving device controls the display device to display the image signal with at least one second operation limit according to a second permission level; Wherein the second permission level is set in the transmission device or the receiving device.

4. The method according to claim 1, wherein The transmission device communicates with the receiving device or the communication device so that the transmission device or the receiving device performs the at least one restricted operation includes: The communication device sets a fourth permission level so that when the communication device transmits the image signal to the receiving device through the transmission device, the display device displays the image signal with at least one fourth operation limit.

5. The method according to claim 1, wherein Further comprising: Establishing a member list and storing the member list in the receiving device; and The receiving device reads the member list so that the communication device obtains at least one permission level according to the member list; Wherein data of the at least one permission level is stored in the communication device.

6. The method according to claim 1, characterized in that, Further comprising: The receiving device obtains a member list from a cloud server; and The receiving device reads the member list so that the communication device obtains at least one permission level according to the member list; Wherein data of the at least one permission level is stored in the cloud server.

7. The method according to claim 1, wherein The receiving device has a member list, which is determined based on the meeting notice group letter information, the group list information of the communication application, and / or the member list information of the communication database.

8. The method according to claim 1, wherein The at least one restricted operation includes operating the timeliness of the meeting scheduling time, and if the timeliness expires, the meeting sharing materials lose authorization.

9. The method according to claim 1, wherein Including: After the communication device establishes a connection with the transmitting device, the transmitting device transmits extended display capability identification data to the data processing device in the communication device; and After the data processing device receives the extended display capability identification data, the data processing device identifies the transmitting device as a virtual display device based on the extended display capability identification data, so as to transmit the video signal to the transmitting device for wireless communication.

10. A control system for wireless projection, characterized in that, Including: Receiving device; Communication device; Transmitting device, establishing a connection with the receiving device or the communication device; and Display device, coupled to the receiving device for displaying images; Wherein after at least one operation restriction is set for one of the transmitting device, the receiving device and the communication device, the transmitting device communicates with the receiving device or the communication device, so that the transmitting device or the receiving device performs at least one restricted operation. After the transmitting device or the receiving device performs the at least one restricted operation, the receiving device selectively or restrictedly projects the video signal onto the display device, and the transmitting device is used to selectively transmit the video signal generated by the communication device to the receiving device according to the at least one operation restriction; The communication device receives the event message of the receiving device through the transmitting device with the third privilege level. If the third privilege level increases, the communication device transfers the event message to at least one other transmitting device with at least one third operation restriction reduced, and if the third privilege level decreases, the communication device transfers the event message to the at least one other transmitting device with at least one third operation restriction increased.

11. The system according to claim 10, wherein, The receiving device transmits a control signal with the first privilege level to the transmitting device, and after the transmitting device receives the control signal from the receiving device, it performs at least one first operation restriction according to the first privilege level.

12. The system according to claim 10, wherein After the transmitting device is triggered, the transmitting device transmits the video signal to the receiving device. The receiving device controls the display device to display the video signal with at least one second operation restriction according to the second privilege level, and the second privilege level is set in the transmitting device or the receiving device.

13. The system according to claim 10, wherein, The communication device sets the fourth privilege level so that when the communication device transmits the video signal to the receiving device through the transmitting device, the display device displays the video signal with at least one fourth operation restriction.

14. The system according to claim 10, wherein The receiving device stores a member list, and the receiving device reads the member list so that the communication device obtains at least one privilege level according to the member list, and the data of the at least one privilege level is stored in the communication device.

15. The system according to claim 10, wherein The receiving device obtains a member list from a cloud server, reads the member list, so that the communication device obtains at least one permission level according to the member list, and the data of the at least one permission level is stored in the cloud server.

16. The system according to claim 10, wherein The receiving device has a member list, which is determined according to meeting notice group letter data, group list data of a communication application, and / or member list data of a communication database.

17. The system according to claim 10, wherein The at least one restricted operation includes the timeliness of operating the meeting scheduling time, and if the timeliness expires, the meeting sharing data loses authorization.

18. The system according to claim 10, wherein After the communication device establishes a connection with the transmitting device, the transmitting device transmits extended display capability identification data to a data processing device in the communication device, and after the data processing device receives the extended display capability identification data, the data processing device identifies the transmitting device as a virtual display device according to the extended display capability identification data, so as to transmit the video signal to the transmitting device for wireless communication.

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