KR20150076649A - Method and Apparatus for sharing screen among multiple devices interactively - Google Patents

Abstract

The present invention relates to a method for sharing a screen between multiple devices in two directions and devices sharing the screen on a bi-directional basis. According to an embodiment of the present invention, the method includes: a step in which a master devices transmits original screen information to either or both of a first member device and a second member device; a step in which the first member device receives the original screen information and displays the original screen information in a first original frame; a step in which the first member device generates the shared screen information changing a first shared frame, transmits the shared screen information to the master device, and requests the shared screen information to be shared; a step in which the master device receives the request and the shared screen information and transmits the shared screen information to the second member device; a step in which the second member device receives the shared screen information and transmits the shared screen information to the second member device; and a step in which the second member device receives the shared screen information and displays the shared screen information to a second shared frame of the second member device.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of sharing a screen in two directions between a plurality of devices and a device sharing a screen in two directions.

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to a screen sharing technology for enabling a conference or an interactive session using a smart display such as a smart TV and a smart device (tablet, smart phone, etc.).

Currently, there are technologies such as WiDi and All Sharecast. However, these technologies merely provide sharing on the screen, and there is a drawback in that it is difficult to share interactive information by each device user, that is, unidirectional sharing such as the above-mentioned technique, and bidirectional sharing.

In particular, if you need to share many mutual opinions, such as an idea meeting, there is a need to provide screen sharing more interactively. In order to provide this, the service has a smart device, And make them cooperatively shareable.

An N-screen is a technology (or service) that allows one multimedia content to be enjoyed continuously on a plurality of devices. N screen is a kind of 'cloud service' technology in which a user purchases multimedia contents that are purchased by the user on a media server of a mobile communication company rather than his own IT device and accesses the multimedia contents through the Internet as needed, to be.

In addition, there is a technique of sharing a screen by transmitting the screen of one's own computer to one screen in a meeting or a classroom in the related art. However, this technology is intended to share a screen, It supports sharing.

Korean Patent Publication No. 1020100073841

An object of the present invention is to provide a method of sharing a screen in two directions between a plurality of devices capable of conducting conference and teaching in two directions and a device sharing a screen in both directions.

A problem to be solved by another embodiment of the present invention is that, in a situation where each person attending a meeting holds a device (a notebook, a tablet, a smart phone, etc.) capable of sharing a screen, Alternatively, the original presentation screen can be shared on the screen with the smart devices of the participants connected by wire and wireless. The attendees can display notes or additional explanations in the shared presentation and share them in real time on the participant's devices. A method of sharing a screen in two directions between a plurality of devices enabling a conference, and a device sharing a screen in both directions.

Another object of the present invention is to provide a method and apparatus for transmitting information requiring updating using three frames through a shared frame, storing a screen for storing only an individual through a personal frame, The present invention provides a method of sharing a screen in a bidirectional manner between a plurality of devices that can be stored in a device after completion of a meeting and a device sharing a screen in a bidirectional manner.

In one embodiment of the present invention, the master device transmits original screen information to at least one of the first member device and the second member device, the first member device receives the original screen information, Displaying the original screen information on the first original frame of the first member device, generating the shared screen information in which the first member device changes the first shared frame, transmitting the shared screen information to the master device , Requesting sharing of the shared screen information, receiving the request and the shared screen information from the master device, and transmitting the shared screen information to the second member device, Receiving the screen information, and displaying the shared screen information on a second shared frame of the second member device Among a plurality of devices comprising it is possible to provide a method for two-way to share the screen.

In one embodiment, the first member device, wherein the first member device includes a first personal frame, comprises: generating personal screen information that alters the first personal frame; And displaying the first frame in the first personal frame.

In another embodiment, the master device generates a group before the master device transmits original screen information to at least one of the first member device and the second member device, Receiving a request from a first member device and the second member device to join the group and sending a determination corresponding to a request that the master device participates in the group to the first member device and the second member device The method comprising the steps of:

In another embodiment, the transmitting of the original screen information to the selected one or more of the first member device and the second member device may include a step of changing and updating the original screen information .

In another embodiment, the first member device displays the original screen information on the first original frame, and the first member device displays the shared screen information on the first shared frame, And displaying the first original frame and the first shared frame in an overlapping manner.

In yet another embodiment, the method further comprises the step of the first member device displaying the personal screen information in the first personal frame, wherein the first source frame, the first shared frame, Can be superimposed and displayed.

In yet another embodiment, the first member device may further include storing the original screen information, the shared screen information, and the personal screen information.

In another embodiment, before the master device transmits the original screen information to one or more selected ones of the first member device and the second member device, the master device sends the first member device and the second member And a time synchronization step with the device.

Another embodiment according to the present invention is a method for operating a method of sharing a screen in two directions among a plurality of devices, wherein the master device is operated by a master user, the first member device is operated by a first user , The second member device is operated by a second user, the master user, the first user and the second user are legally distinguished subjects, wherein the legally distinguished subjects include natural persons and corporations - > a method of operating a method of sharing a screen in two directions between a plurality of devices.

According to another embodiment of the present invention, there is provided a method for transmitting original screen information to a first member device and a second member device, receiving a request for sharing the shared screen information and the shared screen information from the first member device, And a master device for transmitting the information to the second member device.

According to another embodiment of the present invention, there is provided a method for displaying a content, comprising: receiving original screen information from a master device, displaying the original screen information on a first source frame, generating shared screen information corresponding to the original screen information, To the master device to request sharing of the shared screen information, and a second member device that receives the shared screen information from the master device and displays the shared screen information in a second shared frame It is possible to provide a device sharing a screen in a bidirectional manner among a plurality of devices including the device.

In one embodiment, the first member device, wherein the first member device includes a first personal frame, generates personal screen information for changing the first personal frame, Can be displayed on the first personal frame.

In another embodiment, the master device generates a group, receives a request to join the group from the first member device and the second member device, and sends a decision corresponding to a request to join the group to the group 1 member device and the second member device.

In another embodiment, the master device may transmit original screen information to the first member device and the second member device, and may change and update the original screen information.

In another embodiment, the first member device displays the original screen information on the first original frame, and displays the shared screen information on the first shared frame, wherein the first original frame and the first The shared frames can be superimposed and displayed.

In yet another embodiment, the first member device may display the personal screen information in the first personal frame, wherein the first source frame, the first shared frame and the first personal frame are superimposed and displayed have.

In another embodiment, the master device may include a communication module for wirelessly connecting the master device, the first member device and the second member device, a communication module for connecting the master device, the first member device, A member device management module for synchronously transmitting the original screen information and receiving a sharing request of the shared screen information from the first member device and the second member device, A display unit, and a storage unit for storing the original screen information and the shared screen information.

In another embodiment, the master device, the first member device, and the second member device may be a portable terminal, a mobile terminal, a telematics terminal, a notebook computer, A digital broadcasting terminal, a personal digital assistant (PDA), a wibro terminal, an IPTV (Internet Protocol Television) terminal, an AVN (Audio Video Navigation) terminal, a portable multimedia player (PMP) And a navigation terminal (Navigation Terminal).

A conference and a class can be performed in both directions through a method of sharing a screen in a bidirectional manner and a device sharing a screen in a bidirectional manner among a plurality of devices according to an embodiment of the present invention.

A method of sharing a screen in a bidirectional manner between a plurality of devices according to an embodiment of the present invention and a device sharing a screen in two directions and a device (a notebook, a tablet, a smart Phone or the like), the host or presenter of the conference or class can share the original presentation screen on the smart TV or screen to the smart device of the attendant connected by wire and wireless, and the attendee can share the presentation Or additional description, and share it with the participants' devices in real time so that cooperative meetings are possible.

A method of sharing a screen in two directions between a plurality of devices and a device sharing a screen in two directions according to an embodiment of the present invention transmits information requiring updating using three frames through a shared frame, In addition to saving the amount of data transferred in the group by storing the screen to be stored through the individual frame, the changed data of the member can be stored in the own device after completion of the meeting.

FIG. 1 is a flowchart illustrating a method of sharing screens in a bidirectional manner among a plurality of devices according to an exemplary embodiment of the present invention.
2 shows a group screen when starting screen sharing.
FIG. 3 shows a screen in a group when the screen of the first member device is changed.
4 shows a group screen when the first member device requests sharing.
FIG. 5 shows a group screen when a group screen is updated.
FIG. 6 shows a method of sharing screens in two directions among a plurality of devices described in the first to fourth embodiments.
7 is a block diagram illustrating an apparatus for sharing a screen in two directions among a plurality of devices according to an embodiment of the present invention.
8 illustrates an internal configuration of a master device of a device sharing a screen in two directions between a plurality of devices according to an embodiment of the present invention.

Specific structural and functional descriptions of the embodiments of the present invention disclosed herein are for illustrative purposes only and are not to be construed as limitations of the scope of the present invention. And should not be construed as limited to the embodiments set forth herein or in the application.

The embodiments according to the present invention can make various changes and have various forms, so that specific embodiments are illustrated in the drawings and described in detail in this specification or application. It is to be understood, however, that it is not intended to limit the embodiments according to the concepts of the present invention to the particular forms of disclosure, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

The terms first and / or second, etc. may be used to describe various elements, but the elements should not be limited by the terms. The terms are intended to distinguish one element from another, for example, without departing from the scope of the invention in accordance with the concepts of the present invention, the first element may be termed the second element, The second component may also be referred to as a first component.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between. Other expressions that describe the relationship between components, such as "between" and "between" or "neighboring to" and "directly adjacent to" should be interpreted as well.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, the terms "comprises ", or" having ", or the like, specify that there is a stated feature, number, step, operation, , Steps, operations, components, parts, or combinations thereof, as a matter of principle.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the meaning of the context in the relevant art and, unless explicitly defined herein, are to be interpreted as ideal or overly formal Do not.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a flowchart illustrating a method of sharing screens in a bidirectional manner among a plurality of devices according to an exemplary embodiment of the present invention.

Referring to FIG. 1, in step S101, the master device can transmit original screen information to the first member device and the second member device. Here, the original screen information may include information for generating a screen displayed on the master device. For example, the original screen information may include the PDF or PPT data used in the conference. The first member device may include a first source frame, a first shared frame, and a first private frame.

In step S102, the first member device can receive the original screen information and display it on the first original frame. At this time, the user of the first member device can confirm the original screen information through the first original frame.

In step S103, the first member device generates the shared screen information for changing the first shared frame, and transmits the shared screen information to the master device to request sharing of the shared screen information. Also, the first member device can store the original screen information. It is possible to generate a frame distinguished from the first original frame, that is, shared screen information displayed on the first shared frame. The shared screen information may be displayed in the first shared frame. Also, the first shared frame can be displayed together with the first source frame, and the user of the first member device can simultaneously check the original screen information and the shared screen information. Here, the simultaneous confirmation means that the first shared frame and the first original frame can be separately checked, and that the first shared frame and the first original frame can be overlapped in one display. If the user of the first member device desires to share the shared screen information among a plurality of different member devices, a request for the shared screen information may be transmitted to the master device.

In another embodiment, when the master device transmits the original screen information to the first member device and the second member device, the master device may change and update the original screen information, and the first member device and the second member device may change the original screen information And can selectively store the changed original screen information.

In step S104, the master device may receive the shared screen information sharing request and the shared screen information, and may transmit the shared screen information to the second member device. Here, the second member device may be plural. In another embodiment, the shared screen information can be transmitted to the first member device, and the user of the first member device can confirm that the shared screen information generated by the first member device has been transmitted to the other plurality of member devices.

In step S105, the second member device can receive the shared screen information and display the shared screen information on the second shared frame of the second member device. The second member device may include a second source frame, a second shared frame, and a second private frame. The second member device may receive the original screen information first and display the original screen information in the second original frame of the second member device. If the second member device displays the original screen information on the second original frame, when receiving the shared screen information, the shared screen information can be displayed on the second shared frame.

In another embodiment, the first member device may further include a first personal frame, wherein the first member device generates personal screen information that alters the first personal frame, and displays the personal screen information in the first personal frame can do. The personal screen information may include information that is not shared by other member devices. Also, the first member device can display the personal screen information in the first personal frame, and can display the first original frame, the first shared frame, and the first personal frame in a superimposed manner. At this time, the user of the first member device can simultaneously check the information received from the master device, the information generated by the other device, and the information generated by the first member device user. can do. However, the information generated by the first member device user, that is, the information displayed in the first individual frame, can not be confirmed by other member device users.

Further, before the master device transmits the original screen information to the first member device and the second member device, the master device may generate a group and transmit a signal to the at least one member device that intends to join the group that the group has been created. If the master device receives a request from the first member device and the second member device to join the group, the master device may send a decision corresponding to the request to join the group to the first member device and the second member device have. At this time, the master device may allow the participation of a specific member device, and may allow only the participation of a specific member device if necessary.

In one embodiment, the master device may perform time synchronization with the first member device and the second member device before the master device transmits the original screen information to the first member device and the second member device. Through the time synchronization, the master device, the first member device and the second member device, and a plurality of other member devices can receive the original screen information and the shared screen information in real time. If the master device sets the received shared screen information to be always shared, the shared screen information transmitted by the first member device can be transmitted to the second member device in real time. In this way, the first member device can transmit information at a position equivalent to the master device as well as the second member device.

A method for operating a method of sharing a screen in two directions according to an embodiment of the present invention is characterized in that a master device is operated by a master user, a first member device is operated by a first user, And may be operated by a user. In particular, the master user, the first user and the second user may be distinguished by law, and the distinguished subjects may include natural persons and legal persons.

The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. The software module may reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, removable disk, CD-ROM, or any other form of storage medium known in the art It will be possible. An exemplary storage medium would be capable of associating with the processor so that the processor could read information from, and write information to, the storage medium. Alternatively, the storage medium may be incorporated into the processor. The processor and the storage medium may reside in an ASIC. The ASIC may be located within the user terminal. Alternatively, the processor and the storage medium may reside as separate components in a user terminal.

All of the processes described above may be implemented within one or more general purpose or special purpose computers or software code modules executed by processors, and may be fully automated via the software code modules. The code modules may be stored on any type of computer-readable medium or on a collection of other computer storage devices or storage devices. Some or all of the above methods may alternatively be implemented within specialized computer hardware.

All of the methods and tasks described herein may be performed by a computer system and be fully automated. The computer system, in some cases, may be a computer system or a plurality of separate computers or computing devices (e.g., physical servers, workstations, , Storage arrays, etc.). Each such computing device typically includes a processor (or a collection of multiple processors or a circuit or a circuit, e.g., a module) that executes program instructions or modules stored in memory or other non-transitory computer- to be. Although some or all of the various functions described herein may be implemented as application-specific circuitry (e.g., ASICs or FPGAs) in a computer system, the various functions described may be implemented with such program instructions . When the computer system includes a plurality of computing devices, the devices may not be deployed in the same location, but may be deployed together. The results of the disclosed methods and tasks may be permanently stored in different states by solid state memory chips and / or by transducing physical storage devices such as magnetic disks.

Hereinafter, specific embodiments of the present invention will be described.

≪ Example 1 >

2 shows a group screen when starting screen sharing. In Embodiment 1, the master device transmits original screen information to the first member device and the second member device, and the first member device and the second member device display the original screen information in the original frame.

≪ Example 2 >

FIG. 3 shows a screen in a group when the screen of the first member device is changed. In Embodiment 2, the first member device generates the shared screen information and displays it on the shared frame. Further, the first member device generates the personal screen information and displays it on the individual frame.

≪ Example 3 >

4 shows a group screen when the first member device requests sharing. In the third embodiment, the master device receives the shared screen information from the first member device and displays the received shared screen information on the master screen.

<Example 4>

FIG. 5 shows a group screen when a group screen is updated. The master device may transmit the shared screen information to the first member device and the second member device. The first member device and the second member device can receive and display the shared screen information on the screen. At this time, the original frame of the first member device that requested sharing may also be updated.

FIG. 6 shows a method of sharing screens in two directions among a plurality of devices described in the first to fourth embodiments.

Referring to FIG. 6, in step S601, the master device can create a group to which member devices can participate. In step S602, the master device may request the first member device to join the group created by the master device.

In step S603, the master device may request the second member device to join the group created by the master device. In step S604, the first member device may determine whether to join the group, and may transmit a response to join the group to the master device.

In step S605, the second member device may determine whether to join the group, and send a response to join the group to the master device. In step S606, the master device may form a group of the first member device and the second member device.

In step S607, the master device can transmit the original screen information to the first member device. In step S608, the master device can transmit the original screen information to the second member device. Steps S607 and S608 correspond to step S101.

In step S609, the first member device receives the original screen information and displays the original screen information on the first original frame. In step S610, the second member device receives the original screen information, It can be displayed in the original frame. Steps S609 and S610 correspond to step S102.

In step S611, the first member device can generate the shared screen information. In step S612, the first member device may transmit the shared screen information to the master device. Step S612 corresponds to step S103.

In step S613, the master device can receive the shared screen information from the first member device and update the original screen information. In step S614, the master device can transmit the updated original screen information to the first member device. In step S615, the master device can transmit the updated original screen information to the second member device. Step S615 corresponds to step S104.

In step S616, the master device can store the updated original screen information. In step S617, the first member device can store the updated original screen information. In step S618, the second member device can store the updated original screen information.

7 is a block diagram illustrating an apparatus for sharing screens in two directions among a plurality of devices 720, 721, and 722 according to an embodiment of the present invention.

Referring to FIG. 7, in an apparatus sharing a screen in two directions among a plurality of devices 720, 721, and 722 according to an embodiment of the present invention, a master device 710 includes a first member device 720, 2 member device 721 and receive a request for sharing the shared screen information and the shared screen information from the first member device 720. [ Then, the master device 720 can transmit the shared screen information to the second member device 721. [ Here, the master device 710, the first member device 720 and the second member device 721 may be a portable terminal, a mobile terminal, a telematics terminal, a notebook computer A PDA, a Wibro Terminal, an IPTV (Internet Protocol Television) terminal, an AVN (Audio Video Navigation) terminal, a PMP (Portable Multimedia Player), and a navigation terminal And a navigation terminal (vehicle navigation device).

FIG. 8 illustrates an internal configuration of a master device 710 of a device sharing a screen in two directions among a plurality of devices 720, 721, and 722 according to an embodiment of the present invention.

Referring to FIG. 8, a master device according to an embodiment of the present invention may include a communication module 711, a member device management module 712, a display unit 713, and a storage unit 714.

The communication module 711 can connect the master device 710, the first member device 720, and the second member device 721 wirelessly or by wire. Here, the wired or wireless communication network 730 may be a wireless LAN (WLAN), a Wi-Fi, a wireless broadband (Wibro), a World Interoperability for Microwave Access Speed Downlink Packet Access, IEEE 802.16, Long Term Evolution (LTE), and Wireless Mobile Broadband Service (WMBS). The local area communication technology may be Bluetooth, Radio Frequency Identification (RFID), Infrared Data Association (IrDA), Ultra Wide Band (UWB), ZigBee, Near Field Communication ), And the like. The wired communication technology may include USB communication, Ethernet, serial communication, optical / coaxial cable, and the like.

The member device management module 712 synchronizes the master device 710 with the first member device 720 and the second member device 721 to transmit the original screen information and to transmit the first member device 720 and the second member device 720, And can receive a request for sharing the shared screen information from the member device 721. [

The display unit 713 can display original screen information and shared screen information through a display device. Here, the display device may be an LCD (Liquid Crystal Display), a single-chip DLP (Digital Light Processing) projector, a three-chip DLP ), Cathode Ray Tube (CRT), Plasma Display Panel (LCS), Liquid Crystal on Silicon (LCS), Holographic Images on Transparent Screen, OLED , Organic Light Emitting Diode (OLED), and LED display board. The first member device and the second member device may also have the same display device.

The storage unit 714 can store original screen information and shared screen information. The storage unit 714 may be a flash memory type, a hard disk type, a multimedia card micro type, a card type memory (for example, SD or XD memory, etc.) ), A random access memory (SRAM), a read only memory (ROM), an electrically erasable programmable read-only memory (EEPROM), a programmable read-only memory (PROM) A magnetic disk, or an optical disk. The first member device and the second member device may also have the same storage portion.

710: Master device
711: Communication module
712: Member device management module
713:
714:
720 721 722: Member Device
730:

Claims (18)

The master device transmitting original screen information to at least one of the first member device and the second member device;
The first member device receiving the original screen information and displaying the original screen information on a first original frame of the first member device;
Generating the shared screen information in which the first member device changes the first shared frame and transmitting the shared screen information to the master device to request sharing of the shared screen information;
The master device receiving the request and the shared screen information and transmitting the shared screen information to the second member device; And
The second member device receiving the shared screen information and displaying the shared screen information on a second shared frame of the second member device;
The method comprising the steps of:
The method according to claim 1,
The first member device, wherein the first member device includes a first personal frame, comprises: generating personal screen information that alters the first personal frame; And
Displaying the personal screen information on the first personal frame;
Further comprising the steps of: receiving a request for sharing the screen from the plurality of devices;
The method according to claim 1,
Before the master device transmits the original screen information to one or more selected ones of the first member device and the second member device
The master device creating a group;
Receiving a request from the master device to join the group from the first member device and the second member device; And
Sending a determination to the first member device and the second member device corresponding to a request that the master device participates in the group;
Further comprising the steps of: receiving a request for sharing the screen from the plurality of devices;
The method according to claim 1,
The step of the master device transmitting the original screen information to at least one of the first member device and the second member device
Changing and updating the original screen information;
The method comprising the steps of: receiving a plurality of devices;
The method according to claim 1,
The first member device displaying the original screen information on the first original frame; And
Wherein the first member device displays the shared screen information on the first shared frame
And displaying the first source frame and the first shared frame in a superimposed manner.
6. The method of claim 5,
And displaying the personal screen information in the first personal frame by the first member device,
Wherein the display device displays the first original frame, the first shared frame, and the first personal frame in a superimposed manner, thereby sharing the screen in both directions among the plurality of devices.
The method according to claim 1,
Storing the original screen information, the shared screen information, and the personal screen information by the first member device;
Further comprising the steps of: receiving a request for sharing the screen from the plurality of devices;
The method according to claim 1,
Before the master device transmits the original screen information to one or more selected ones of the first member device and the second member device
Synchronizing the master device with the first member device and the second member device;
Further comprising the steps of: receiving a request for sharing the screen from the plurality of devices;
A method of operating a method of sharing a screen in a bidirectional manner between a plurality of devices of claim 1,
Wherein the master device is operated by a master user, the first member device is operated by a first user, the second member device is operated by a second user,
Characterized in that the master user, the first user and the second user are legally distinguished subjects, wherein the legally distinguished subjects include natural persons and legal persons. &Lt; RTI ID = 0.0 &gt; How to manage how to share.
The first member device transmits the original screen information to the first member device and the second member device, receives a request for sharing the shared screen information and the shared screen information from the first member device, and transmits the shared screen information to the second member device The master device sharing the screen in two directions among the plurality of devices.
A master device for receiving original screen information, displaying the original screen information on a first source frame, generating shared screen information corresponding to the original screen information, transmitting the shared screen information to the master device, A first member device requesting sharing of screen information; And
A second member device that receives the shared screen information from the master device and displays the shared screen information in a second shared frame;
The device sharing a screen in a bidirectional manner.
11. The method of claim 10,
Wherein the first member device, wherein the first member device includes a first personal frame, generates personal screen information for changing the first personal frame,
And the personal screen information is displayed on the first personal frame.
11. The method of claim 10,
The master device generates a group, receives a request to join the group from the first member device and the second member device, and sends a decision corresponding to the request to join the group to the first member device and the second member device, 2 member device, wherein the device shares the screen in two directions among the plurality of devices.
11. The method of claim 10,
Wherein the master device transmits the original screen information to the first member device and the second member device, and changes the original screen information to update the original screen information.
11. The method of claim 10,
Wherein the first member device displays the original screen information on the first original frame and displays the shared screen information on the first shared frame,
Wherein the display unit displays the first original frame and the first shared frame in a superimposed manner, and shares the screen in both directions among the plurality of devices.
16. The method of claim 15,
Wherein the first member device displays the personal screen information in the first personal frame and displays the first original frame, the first shared frame and the first personal frame in a superimposed manner, Devices sharing the screen in two directions.
11. The method of claim 10,
The master device
A communication module for wirelessly connecting the master device, the first member device, and the second member device;
A member device for synchronizing the master device with the first member device and the second member device to transmit the original screen information and receiving a request for sharing the shared screen information from the first member device and the second member device; A device management module;
A display unit displaying the original screen information and the shared screen information; And
A storage unit for storing the original screen information and the shared screen information;
The device sharing a screen in a bidirectional manner.
11. The method of claim 10,
The master device, the first member device and the second member device may be a portable terminal, a mobile terminal, a telematics terminal, a notebook computer, a digital broadcasting terminal, personal information An AVN (Audio Video Navigation) terminal, a PMP (Portable Multimedia Player), and a navigation terminal (vehicle navigation device) (Navigation Terminal) The device sharing a screen in a bidirectional manner among a plurality of devices.

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