CN100534165C - Method and system for many-to-one transmission and information display by local area network - Google Patents

Abstract

A method for transmitting and displaying information in a local area network from many to one is applied to a local area network formed by a first electronic device, at least one second electronic device and at least one processing device, and is matched with an output device to display a display information. The method is used for adjusting the preset display information to be transmitted to the processing device respectively by the first electronic device and the second electronic device according to a picture layout, and then transmitting the preset display information to the processing device to be integrated into the display information for the output device to output, so that the transmission data volume and the operation amount of integration processing are reduced. A system for transmitting and displaying information in a local area network is also disclosed.

Description

Method and system for many-to-one transmission and display of information via local area network

technical field

The present invention relates to a method and system for many-to-one transmission and display of information via a local area network, in particular to a method and system for many-to-one transmission and display of information that saves network bandwidth and reduces display processing load.

Background technique

Due to the rapid development of information technology, the digital application of various information has become more and more popular. One of the application methods is to divide the screen into multiple display areas, and provide each display area to multiple information sources, so that multiple information can be displayed on one screen at the same time, such as during a meeting when.

Please refer to FIG. 1 , in order to realize the above-mentioned many-to-one transmission and display information purpose, the known many-to-one transmission and display information system 1 transmits the unprocessed information UPD of the second electronic device 12, 13 to the first electronic device 11 . The first electronic device 11 performs image integration processing together with its own unprocessed information UPD, and then transmits the integrated image IPF to the third electronic device 14 . Finally, the third electronic device 14 sends the integrated image IPF to the output device 15 for output.

Please refer to FIG. 2 , another many-to-one transmission and display information system 2 , in which the first electronic device 21 transmits the related information of the screen layout LO to the third electronic device 24 . After that, the first electronic device 21 and the second electronic devices 22 and 23 respectively transmit the unprocessed information UPD to the third electronic device 24 . The third electronic device 24 performs image integration processing according to the previously received image layout LO. Finally, the third electronic device 14 also sends the integrated image to the output device 15 for output.

The above two known techniques involve the following disadvantages. First, the first electronic device, the second electronic device, and the third electronic device are connected by a local area network. If unprocessed information is directly transmitted, the network bandwidth will be greatly consumed, and other users of the network will be affected, and even serious bandwidth consumption will occur. And cause the problem of screen delay. Second, no matter whether the first electronic device 11 or the third electronic device 24 performs image integration processing, the information integration end (the first electronic device 11 or the third electronic device 24 ) must have better computing and processing capabilities. Hardware devices with better computing and processing capabilities mean higher hardware costs. If the calculation processing capability is insufficient, it will also cause the problem of image delay.

To sum up, how to improve the network bandwidth consumption of the many-to-one transmission and display information system and reduce the calculation load of the information integration terminal to process the image integration is the goal that needs to be worked hard at present.

Contents of the invention

In view of the above problems, the purpose of the present invention is to provide a method and system for many-to-one transmission and display of information in a local area network, which can reduce the consumption of network bandwidth and reduce the amount of calculations for processing screen integration at the information integration end.

In order to achieve the above object, the method of the present invention for transmitting and displaying information in a local area network is applied to a local area network composed of a first electronic device, at least one second electronic device and at least one processing device, and cooperates with an output device to Displaying a display message, the steps of the method include: the first electronic device provides a list including the processing device on the local area network for a user to select one of them; the first electronic device sends a screen layout to the received The selected processing device, the screen layout includes M display areas and geometric information of each display area, where M≧2, M is a positive integer; the first electronic device sends an invitation request and the screen layout to the second Two electronic devices; when the second electronic device agrees to the invitation request, the second electronic device notifies the selected processing device; the processing device sequentially allocates the M display areas to the first electronic device according to an allocation principle And N invited second electronic devices to display the display information, where 1≦N≦M-1, N is a positive integer; the first electronic device and the second electronic device are assigned according to the display information The geometric information of the area adjusts the geometric size of a predetermined display information, and respectively transmits the adjusted predetermined display information to the processing device; the processing device receives the adjusted predetermined display information and updates the corresponding display area; and The output device regularly updates the display information according to the data in the display area.

The system of the present invention for transmitting and displaying information through a local area network includes a first electronic device, at least one second electronic device, at least one processing device and an output device. The output device is signally connected with the processing device for displaying information. The first electronic device, the second electronic device and the processing device are on a local area network and execute the above method, which will not be repeated here.

According to the method and system for many-to-one transmission and display of information in the local area network of the present invention, before transmitting the scheduled display information, adjustments are made to effectively reduce the amount of transmitted data, thereby effectively reducing the consumption of network bandwidth. At the same time, the processing device only needs to directly integrate them into one display screen, thus greatly reducing the amount of computation for processing screen integration at the information integration end.

Description of drawings

FIG. 1 is a known architecture for many-to-one transmission and display of information;

FIG. 2 is another known architecture for many-to-one transmission and display of information;

FIG. 3 is a method and system for transmitting and displaying information by using a local area network many-to-one according to a preferred embodiment of the present invention;

FIG. 4 is a flowchart showing the implementation steps of the first electronic device according to the preferred embodiment of the present invention;

FIG. 5 is a flowchart showing the implementation steps of the second electronic device according to the preferred embodiment of the present invention;

Fig. 6 is a flowchart showing the implementation steps of the processing device of the preferred embodiment of the present invention;

Fig. 7 is a flowchart showing the implementation steps of changing the layout of the screen in the preferred embodiment of the present invention;

FIG. 8 is a schematic diagram showing a display screen of a preferred embodiment of the present invention; and

FIG. 9 is a schematic diagram showing the user interface of the transmitting end in a preferred embodiment of the present invention.

Detailed ways

The method and system for many-to-one transmission and display of information through a local area network according to preferred embodiments of the present invention will be described below with reference to related drawings, wherein the same components will be described with the same reference symbols.

Please refer to FIG. 3 , the method for transmitting and displaying information via a local area network in a preferred embodiment of the present invention is applied to a local area network composed of a first electronic device 31, at least one second electronic device 32, and at least one processing device 33. And cooperate with an output device 34 to display information. The type of information can be video (Video), image (Image), graphic (Graphic), text (Text), presentation (Presentation), screen capture (Screen capture), or a combination thereof.

The execution process of the method of the present invention is shown in FIG. 3 . First, the first electronic device 31 provides a list for the user to select one of the processing devices 33, wherein the list includes the processing devices 33 on the LAN (S301). After the user selects the processing device 33 , the first electronic device 31 establishes a connection with the selected processing device 33 . The method of establishing a network connection is well known to those of ordinary skill in the technical field of the present invention. For example, the first electronic device 31 notifies the selected processing device 33 with a use request, and the selected processing device 33 returns a response to establish connection, so the method of establishing a connection will not be described in detail here. Next, the first electronic device 31 transmits a frame layout LO to the selected processing device 33 ( S302 ). The screen layout LO includes M display areas and geometric information of each display area, where M≧2, M is a positive integer. The first electronic device 31 then sends an invitation request and the screen layout LO to the second electronic device 32 ( S303 ), so as to invite the second electronic device 32 to send information for display by the output device 34 . If the second electronic device 32 accepts the invitation, the second electronic device 32 notifies the selected processing device 33 (S304). The processing device 33 sequentially allocates display areas to the first electronic device 31 and N invited second electronic devices 32 for displaying information according to the screen layout LO and an allocation principle (S305), where 1≦N≦M-1 , N is a positive integer. For example, a screen is divided into four grids, that is, there are 4 display areas for 4 electronic devices to display information, of which 1 display area is used by the first electronic device 31, and the remaining 3 display areas can be used on a first-come-first-served basis The service (First Come First Served) principle is assigned to the invited second electronic device 32 for use.

The first electronic device 31 and the second electronic device 32 respectively adjust the geometric size of the predetermined display information according to the geometric information of the assigned display area (S306), for example, reduce the resolution of the screen, and then transmit the adjusted predetermined display information to the processing device (S307). The processing device 33 receives the adjusted predetermined display information and updates the corresponding display area (S308). Finally, the output device 34 periodically updates the screen according to the data of each display area.

Please refer to FIG. 4 to illustrate the detailed execution flow of the first electronic device 31 . First, the first electronic device 31 searches for processing devices on the local area network (S401) and creates a list. This operation can be performed when the user requests to provide a list, or can be performed in advance when the first electronic device 31 or the local area network is idle. search. Next, the first electronic device 31 provides a list including processing devices for the user to select (S402). After the user selects the processing device 33, the first electronic device 31 establishes a connection with the selected processing device 33. The connection method is well known to those of ordinary skill in the technical field of the present invention. After that, the first electronic device 31 transmits the screen layout LO to the processing device 33 (S406).

It should be noted that if the processing device 33 has security settings, when the first electronic device 31 requests to use the processing device 33, a verification procedure (S403) needs to be performed first, such as inputting a password for verification, and only after the verification is completed. Next step flow (S404). Otherwise, go back to the verification procedure until the verification is completed, or the user gives up the verification and exits the system. In addition, the first electronic device 31 may provide a plurality of templates of the screen layout LO for the user to select (S405), such as four-panel grid, nine-square grid, etc., so as to facilitate the user to plan the screen screen.

Next, the first electronic device 31 transmits the invitation request and the screen layout LO to the second electronic device 32 (S407). It should be noted that the invitation request is not limited to any form, and it can not only be sent through the first electronic device 31, but also can be directly invited by the user verbally. This invitation method is especially suitable during the meeting.

The processing device 33 sequentially allocates display areas to the first electronic device 31 and the invited second electronic device 32 for displaying information according to the screen layout LO. After receiving the information, the size of the scheduled display information can be adjusted according to the geometric information of the display area (S409). For example, the display area is a rectangle, and the geometric information of the display area includes the length and width of the rectangle and/or coordinate information describing the rectangle, such as the coordinates of the endpoints of the rectangle. Afterwards, the first electronic device 31 transmits the adjusted scheduled display information to the processing device 33 (S411). Finally, it is judged whether the user requests to end the transmission of information, if not, return to step S409, continue to adjust and transmit the scheduled display information. In order to further save network bandwidth, a compression coding procedure (S410) can be performed before transmitting the scheduled display information. When the processing device 33 receives the compressed and coded information, it executes the corresponding decoding procedure to normally process the received information.

Please refer to FIG. 5 to illustrate the detailed execution flow of the second electronic device 32 . First, the second electronic device 32 first receives the invitation request and the screen layout LO from the first electronic device 31 ( S501 ). If the second electronic device 32 does not accept the invitation (S502), the process ends directly. If the second electronic device 32 accepts the invitation, it notifies the selected processing device 33 to establish a connection (S503), such as sending a use request. The processing device 33 sequentially allocates display areas to the first electronic device 31 and the invited second electronic device 32 for displaying information according to the screen layout LO. After receiving the information, the size of the predetermined display information can be adjusted according to the geometric information of the display area (S505), and then the adjusted predetermined display information is sent to the processing device 33 (S507). Finally, it is judged whether the user requests to end the transmission of information, if not, return to step S505, and continue to adjust and transmit the scheduled display information. Similarly, the second electronic device 32 may perform a compression coding procedure before transmitting the scheduled display information (S506), and the processing device 33 executes a corresponding decoding procedure when receiving the compressed and coded information.

Referring to FIG. 6 , the detailed execution flow of the processing device 33 will be described. First, after the processing device 33 establishes a connection with the first electronic device 31, the processing device 33 receives the screen layout LO sent by the first electronic device 31 (S601). The screen layout LO includes M display areas and each display area Geometric information, where M≧2, M is a positive integer. It should be noted that if the processing device 33 has a security setting, when the first electronic device 31 establishes a connection with the processing device 33, a verification procedure needs to be performed first, such as inputting a password for verification. Next, detect and receive the use request of the invited second electronic device 32 (S602). The processing device 33 allocates the display area in the screen arrangement to the first electronic device 31 and the invited second electronic device 32 according to the first come first served (First Come First Served) principle (S603). After that, the processing device 33 waits to receive the adjusted scheduled display information transmitted from the first electronic device 31 and the second electronic device 32 ( S604 ). If the adjusted scheduled display information is compressed and encoded, the processing device 33 performs a decoding procedure (S605) to facilitate subsequent processing. The processing device 33 then integrates the received adjusted predetermined display information into one display information (S606), that is, a display screen, and then transmits it to the output device 34 for output and display (S607). Steps S604 to S607 are repeated until the end of the user request.

Please refer to FIG. 8. In addition to allocating and integrating predetermined display information in the display screen 8 according to the display area 81 of the screen layout LO, the processing device 33 can also display the device names or user names of the first electronic device 31 and the second electronic device 32. The titles are displayed on the corresponding display areas 81 respectively. As shown in FIG. 8 , the user name 811 is marked on the lower right corner of the corresponding display area 81 . Similarly, the user interfaces of the first electronic device 31 and the second electronic device 32 can also display the display areas they are using. As shown in FIG. 9 , the icons 911 in the user interfaces 91 - 94 of the transmitting end display the currently used display area. For example, corresponding to the display area in FIG. 8 , Thomas at the transmitting end is using the display area in the upper left corner, as shown by the icon 911 in the user interface 91 .

It should be noted that when the first electronic device 31 repeats the steps S409-S412, it can change the screen layout LO according to the user's request at any time. For example, the first electronic device 31 requires to change the allocation status of the same screen layout LO, or to directly change the screen layout LO, such as changing from quadrangular grid to nine-square grid, or picture-in-picture. Similarly, the second electronic device 32 can also change the screen layout LO at any time according to the user's request when repeating steps S505-S508. The processing flow of changing the screen layout LO is shown in FIG. 7 . The first electronic device 31 or the second electronic device 32 requests the processing device 33 to change the screen layout LO (S701). The processing device 33 judges whether it is a full screen (full screen) mode request (S702). If not, step S703 is executed, and the processing device 33 notifies the first electronic device 31 and the second electronic device 32 to update the screen layout LO. The first electronic device 31 and the second electronic device 32 then use the updated screen layout LO to adjust the scheduled display information and transmit it to the processing device (S704). The subsequent adjustment and transmission steps are as described above and will not be repeated here. .

If the request for updating the screen layout is the full-screen mode, step S705 is executed, and the processing device requests the first electronic device 31 or the second electronic device 32 that has not requested the full-screen mode to stop transmitting the predetermined display information, or the processing device 33 directly does not Process these scheduled display messages. Next, the processing device 33 only accepts the predetermined display information sent by the first electronic device 31 or the second electronic device 32 that requests the full-screen mode (S706). Judging whether the first electronic device 31 or the second electronic device 32 that proposes the full-screen mode request requests to end the full-screen mode (S707), if not, repeat step S706, if so, the processing device 33 notifies the first electronic device of the allocation status of the original display area. The electronic device 31 and the second electronic device 32 (S708). The first electronic device 31 and the second electronic device 32 adjust and transmit predetermined display information according to the geometry information of the original display area (S709). It should be noted that when entering the full-screen mode, the processing device can send a disabling command to invalidate the full-screen mode requests of the first electronic device 31 and the second electronic device 32 that have not made the request, so as to avoid the failure in the full-screen mode. , other electronic devices request the full-screen mode. For example, please refer to FIG. 9 , when the transmitter Thomas presses the button 921 to activate the full-screen mode, the buttons 921 of the other transmitters are disabled, and the full-screen mode request cannot be executed.

A system 3 for many-to-one transmission and display of information via a local area network in a preferred embodiment of the present invention is shown in Figure 3, which includes a first electronic device 31, at least one second electronic device 32, at least one processing device 33 and an output device 34. The first electronic device 31 , the second electronic device 32 and the processing device 33 are connected to each other by signals to form a local area network. The LAN can be a wired or wireless LAN. The processing device 33 and the output device 34 are signal-connected in a wired or wireless manner, and may also be directly integrated. The output device 34 is used to display information, and it can be a projector, a screen, or a TV.

The first electronic device 31 , the second electronic device 32 and the processing device 33 execute the steps of the aforementioned method, which will not be repeated here. Taking the system of the present invention applied to a wireless local area network as an example, the first electronic device 31, the second electronic device 32 and the processing device 33 can be computers, personal digital assistants (Personal Digital Assistant, PDA), mobile phones (Mobile Phone), etc. It can also be a wireless projector converter (Wireless Projector Adapter), a wireless set-top box (Wireless Setup Box), a wireless digital media converter (Wireless DigitalMedia Adapter, Wireless DMA), a wireless optical disc player (Wireless Optical DiscPlayer), a wireless DVD player (Wireless DVD Player), Wireless Video Recorder (WirelessVideo Recorder), Wireless Game Console (Wireless Game Console), Wireless Portable Media Player (Wireless Portable Media Player), etc.

According to the method and system for many-to-one transmission and display of information in a local area network according to the present invention, before transmitting the scheduled display information, the geometric size of the display area is first adjusted to effectively reduce the amount of transmitted data, thus effectively reducing the network bandwidth. consume. In addition, the predetermined display information has been adjusted by the first electronic device and the second electronic device according to the size of the display area, and the processing device only needs to directly integrate it into a display screen, thus greatly reducing the information integration cost (that is, the present invention). The processing device) handles the calculation amount of picture integration, so the present invention can be executed by hardware with relatively poor calculation processing capability, so as to reduce the cost.

The above descriptions are illustrative only, not restrictive. Anyone skilled in the art can make equivalent modifications based on the above-mentioned embodiments of the present invention without departing from its spirit and scope. Therefore, any equivalent modification or change made without departing from the spirit and scope of the present invention shall be included in the scope of the appended claims.

Claims (22)

1. method with local area network (LAN) many-one transmission and display message, be applied to the local area network (LAN) that one first electronic installation, at least one second electronic device and at least one processing unit are formed, and cooperate an output device to show a display message, the step of this method comprises:

This first electronic installation provides an inventory that comprises this processing unit on this local area network (LAN), selects one of them for a user;

This first electronic installation transmits a picture and is disposed to selecteed this processing unit, and this picture is arranged the geological information that comprises M viewing area and each this viewing area, M ≧ 2 wherein, and M is a positive integer;

This first electronic installation transmits one and invites requirement and this picture to be disposed to this second electronic device;

When this second electronic device agreed that this invitation requires, this second electronic device was notified selecteed this processing unit;

This processing unit is according to a distribution principle, distributes this M viewing area to give this second electronic device that this first electronic installation and N quilt invited to show this display message in regular turn, 1 ≦ N ≦ M-1 wherein, and N is a positive integer;

This first electronic installation and this second electronic device are adjusted the geometric size of a predetermined display message respectively according to the geological information of this viewing area that is assigned to, and should predetermined display message be sent to this processing unit with adjusted respectively;

This processing unit receives adjusted being somebody's turn to do and is scheduled to display message and upgrades corresponding this viewing area; And

This output device is according to this display message of data regular update of this viewing area.

2. the method with transmission of local area network (LAN) many-one and display message as claimed in claim 1, wherein this inventory is that this processing unit that this first electronic installation is searched on this local area network (LAN) in advance or is immediately set up.

3. the method with transmission of local area network (LAN) many-one and display message as claimed in claim 1 more comprises:

Before this first electronic installation transmits this picture and is disposed to selecteed this processing unit, carry out a proving program with this processing unit.

4. the method with transmission of local area network (LAN) many-one and display message as claimed in claim 1 more comprises:

The template that this first electronic installation provides a plurality of these pictures to arrange is selected one of them for this user.

5. the method with transmission of local area network (LAN) many-one and display message as claimed in claim 1 more comprises:

This first electronic installation and/or this second electronic device transmit should predetermined display message to this processing unit, carry out a compressed encoding program earlier, this processing unit then carries out a corresponding decoding program when receiving this predetermined display message.

6. the method with transmission of local area network (LAN) many-one and display message as claimed in claim 1, wherein this distribution principle is for serving principle first earlier.

7. the method with transmission of local area network (LAN) many-one and display message as claimed in claim 1 more comprises:

This first electronic installation or this N second electronic device require this processing unit to change this picture layout, and when this picture is arranged unusual fluctuation, this processing unit is notified this first electronic installation and this N second electronic device, and the geological information of this first electronic installation and this N second electronic device this viewing area after with unusual fluctuation is adjusted the geometric size of this predetermined display message and is sent to this processing unit.

8. the method with transmission of local area network (LAN) many-one and display message as claimed in claim 1 more comprises:

When one of them transmits a full screen mode requirement to this processing unit when this first electronic installation or this N second electronic device, this processing unit requires all the other electronic installations except this electronic installation that transmits this full screen mode requirement to stop to transmit should be scheduled to display message, being somebody's turn to do of electronic installation that makes this output device propose this full screen mode requirement with the full screen mode demonstration is scheduled to display message, and when this processing unit is carried out this full screen mode requirement, more transmit a disable command, make this full screen mode of all the other electronic installations except this electronic installation that transmits this full screen mode requirement require to lose efficacy; When finishing this full screen mode, this processing unit is notified this first electronic installation and this N second electronic device with the distribution state of this viewing area.

9. the method with transmission of local area network (LAN) many-one and display message as claimed in claim 1 more comprises:

This processing unit is shown in corresponding this viewing area respectively with device name or user's title of this first electronic installation and N this second electronic device; This first electronic installation and this second electronic device then show this viewing area that this first electronic installation and this second electronic device are using.

10. the method with transmission of local area network (LAN) many-one and display message as claimed in claim 1, wherein the geological information of this viewing area comprises the length and the width of a rectangle, and/or describes the coordinate information of this rectangle.

11. the method with transmission of local area network (LAN) many-one and display message as claimed in claim 1, wherein this first electronic installation and this second electronic device are a computer, personal digital assistant, mobile phone, wireless display instrument transducer, wireless set-top box, wireless digital medium converter, wireless optical disk player, wireless DVD player, wireless video recorder, wireless game player or portable wireless media player;

This processing unit is a computer, personal digital assistant, mobile phone, wireless display instrument transducer, wireless set-top box, wireless digital medium converter, wireless optical disk player, wireless DVD player, wireless video recorder, wireless game player or portable wireless media player;

This output device is a projecting apparatus, screen or TV.

12. the system with transmission of local area network (LAN) many-one and display message, it comprises:

One first electronic installation;

At least one second electronic device, it is connected with this first electronic installation signal;

At least one processing unit, it is connected with this first electronic installation and this second electronic device signal, and this first electronic installation, this second electronic device and this processing unit are formed a local area network (LAN); And

One output device is in order to show a display message;

Wherein, this first electronic installation provides an inventory that comprises this processing unit on this local area network (LAN), selects one of them for a user;

This first electronic installation transmits a picture and is disposed to selecteed this processing unit, and this picture is arranged the geological information that comprises M viewing area and each this viewing area, M ≧ 2 wherein, and M is a positive integer;

This first electronic installation transmits one and invites requirement and this picture to be disposed to this second electronic device;

When this second electronic device agreed that this invitation requires, this second electronic device was notified selecteed this processing unit;

This processing unit is according to a distribution principle, distributes this M viewing area to give this second electronic device that this first electronic installation and N quilt invited to show this display message in regular turn, 1 ≦ N ≦ M-1 wherein, and N is a positive integer;

This first electronic installation and this second electronic device are adjusted the geometric size of a predetermined display message respectively according to the geological information of this viewing area that is assigned to, and should predetermined display message be sent to this processing unit with adjusted respectively;

This processing unit receives adjusted being somebody's turn to do and is scheduled to display message and upgrades corresponding this viewing area; And

This output device is according to this display message of data regular update of this viewing area.

13. the system with transmission of local area network (LAN) many-one and display message as claimed in claim 12, wherein this inventory is that this processing unit that this first electronic installation is searched on this local area network (LAN) in advance or is immediately set up.

14. the system with local area network (LAN) many-one transmission and display message as claimed in claim 12 before wherein this first electronic installation transmits this picture and is disposed to selecteed this processing unit, carries out a proving program with this processing unit.

15. the system with transmission of local area network (LAN) many-one and display message as claimed in claim 12, wherein this first electronic installation provides the template of a plurality of these pictures layouts to select one of them for this user.

16. the system with transmission of local area network (LAN) many-one and display message as claimed in claim 12, wherein this first electronic installation and/or this second electronic device should be scheduled to display message to this processing unit in transmission, carry out a compressed encoding program earlier, this processing unit then carries out a corresponding decoding program when receiving this predetermined display message.

17. the system with transmission of local area network (LAN) many-one and display message as claimed in claim 12, wherein this first electronic installation or this N second electronic device can require this processing unit to change this picture layout, and when this processing unit is arranged unusual fluctuation at this picture, notify this first electronic installation and this N second electronic device, the geological information of this first electronic installation and this N second electronic device this viewing area after with unusual fluctuation is adjusted the geometric size of this predetermined display message and is sent to this processing unit.

18. the system with transmission of local area network (LAN) many-one and display message as claimed in claim 12, wherein this processing unit receive this first electronic installation or this N second electronic device one of them when transmitting a full screen mode requirement, promptly require all the other electronic installations except this electronic installation that transmits this full screen mode requirement to stop to transmit this predetermined display message, being somebody's turn to do of electronic installation that makes this output device propose this full screen mode requirement with the full screen mode demonstration is scheduled to display message, and when this processing unit is carried out this full screen mode requirement, more transmit a disable command, make this full screen mode of all the other electronic installations except this electronic installation that transmits this full screen mode requirement require to lose efficacy; When finishing this full screen mode, this processing unit is notified this first electronic installation and this N second electronic device with the distribution state of this viewing area.

19. the system with transmission of local area network (LAN) many-one and display message as claimed in claim 12, wherein this processing unit is shown in corresponding this viewing area respectively with device name or user's title of this first electronic installation and N this second electronic device; This first electronic installation and this second electronic device then show this viewing area that it is using.

20. the system with transmission of local area network (LAN) many-one and display message as claimed in claim 12, wherein the geological information of this viewing area comprises the length and the width of a rectangle, and/or describes the coordinate information of this rectangle.

21. the system with transmission of local area network (LAN) many-one and display message as claimed in claim 12, wherein this local area network (LAN) is a wired or wireless local area network (LAN).

22. the system with transmission of local area network (LAN) many-one and display message as claimed in claim 12, wherein this first electronic installation and this second electronic device are a computer, personal digital assistant, mobile phone, wireless display instrument transducer, wireless set-top box, wireless digital medium converter, wireless optical disk player, wireless DVD player, wireless video recorder, wireless game player or portable wireless media player;

This processing unit is a computer, personal digital assistant, mobile phone, wireless display instrument transducer, wireless set-top box, wireless digital medium converter, wireless optical disk player, wireless DVD player, wireless video recorder, wireless game player or portable wireless media player;

This output device is a projecting apparatus, screen or TV.

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