CN104333574A - Electronic whiteboard synchronization method and system - Google Patents
Electronic whiteboard synchronization method and system Download PDFInfo
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- CN104333574A CN104333574A CN201410560215.9A CN201410560215A CN104333574A CN 104333574 A CN104333574 A CN 104333574A CN 201410560215 A CN201410560215 A CN 201410560215A CN 104333574 A CN104333574 A CN 104333574A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/40—Support for services or applications
- H04L65/401—Support for services or applications wherein the services involve a main real-time session and one or more additional parallel real-time or time sensitive sessions, e.g. white board sharing or spawning of a subconference
- H04L65/4015—Support for services or applications wherein the services involve a main real-time session and one or more additional parallel real-time or time sensitive sessions, e.g. white board sharing or spawning of a subconference where at least one of the additional parallel sessions is real time or time sensitive, e.g. white board sharing, collaboration or spawning of a subconference
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F9/00—Arrangements for program control, e.g. control units
- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
- G06F9/44—Arrangements for executing specific programs
- G06F9/451—Execution arrangements for user interfaces
- G06F9/452—Remote windowing, e.g. X-Window System, desktop virtualisation
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/042—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means
- G06F3/0425—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means using a single imaging device like a video camera for tracking the absolute position of a single or a plurality of objects with respect to an imaged reference surface, e.g. video camera imaging a display or a projection screen, a table or a wall surface, on which a computer generated image is displayed or projected
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/048—Interaction techniques based on graphical user interfaces [GUI]
- G06F3/0484—Interaction techniques based on graphical user interfaces [GUI] for the control of specific functions or operations, e.g. selecting or manipulating an object, an image or a displayed text element, setting a parameter value or selecting a range
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- Theoretical Computer Science (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Multimedia (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
- Drawing Aids And Blackboards (AREA)
Abstract
The invention discloses an electronic whiteboard synchronization method. The method comprises the following steps: at least two electronic whiteboards build communication connection to form a meeting group; when the meeting group is formed, the same initialization processing is carried out on the involved electronic whiteboards; when user operation happens, an operated electronic whiteboard generates an operation command according to the user operation; the operated electronic whiteboard sends the operation command to other electronic whiteboards in the meeting group; and all electronic whiteboards in the meeting group respond to the operation command. The invention also discloses an electronic whiteboard synchronization system. According to the electronic whiteboard synchronization method and the system, the operation command which occupies little bandwidth only needs to be transmitted during the synchronization process, synchronization is quick, and in addition, through the same initialization, the synchronization content can be ensured.
Description
Technical field
The present invention relates to electronic whiteboard technology field, particularly relate to a kind of electric white board synchronous method and a kind of synchronization of electronic whiteboards system.
Background technology
Widely, wherein modal is exactly remote desktop to the application of remote synchronization technology, and remote desktop can be used in the fields such as telecommuting, long-distance education, remote maintenance and Long-distance Control at present.
Remote desktop is left away by a computer (main control end Remote/ client) long distance to control another computer (controlled terminal Host/ server end) on network, picture is sent to main control end main frame by network by the picture of controlled main frame simultaneously, realizes the effect of remote desktop.
The most crucial index of remote desktop is exactly the speed transmitted, shared bandwidth, because the core of this technology is exactly the picture transmission of remote desktop, how more efficient, more the mode of bandwidth-saving is by the picture synchronization of remote desktop to control end, and this is the key technology of remote desktop.
The technology that traditional remote desktop adopts has, image compression, the technology such as variable quantity transmission.No matter be adopt which kind of method, be all the image be reduced into one by one, be then presented at Terminal Server Client.
Adopt the mode transmitting image to be synchronized to remote port, maximum problem is exactly bandwidth, in any case compression, how encoding, if the picture of remote terminal is the video that a rate of change is very high, compression efficiency is very low, cannot break away from the dependence to bandwidth.
Summary of the invention
Based on this, be necessary the electric white board synchronous method providing a kind of occupied bandwidth less.
In addition, a kind of synchronization of electronic whiteboards system is also provided.
A kind of electric white board synchronous method, based on the conference system comprising the electronic whiteboard that at least two communicate to connect mutually, described electronic whiteboard comprising blank main body for writing, being located at the touch sensible assembly of described blank main body surrounding, for by image projection to the projecting subassembly in blank main body and the control assembly controlling touch sensible assembly and projecting subassembly collaborative work, described method comprises the steps:
At least two electronic whiteboards establish a communications link formation conference group;
When conference group is formed, the electronic whiteboard participated in makes identical initialization process;
When there is user operation, by the electronic whiteboard that operates according to the order of user operation generating run;
Described operational order is sent to other electronic whiteboards of conference group by the electronic whiteboard that operates;
The all electronic whiteboards of conference group all respond described operational order.
Wherein in an embodiment, described at least two electronic whiteboards establish a communications link and form the step of conference group and comprise:
Invited at least one electronic whiteboard initiating conference by an electronic whiteboard, when the electronic whiteboard that at least one is invited to accepts described invitation, the electronic whiteboard that initiating conference is invited forms the conference group that can intercom mutually with the electronic whiteboard accepting invitation;
Wherein, each electronic whiteboard is endowed unique identifying number, and the electronic whiteboard of initiating to invite searches the electronic whiteboard of wishing to invite by described unique identifying number.
Wherein in an embodiment, described user operation comprises to be clicked and slides, and described operational order comprises:
Writing region according to sliding trace generation or erasing trace graphics;
Instruction is zoomed in or out according to the relative sliding Track Pick-up of multiple spot;
Single according to menu area clicks the menu instructions generated;
The instruction that opens file generated is clicked according to the single on file icon or two times.
Wherein in an embodiment, when described operational order for generate or wipe trace graphics, zoom in or out instruction and menu instructions time, directly sent described operational order by the electronic whiteboard that operates to other electronic whiteboards of conference group.
Wherein in an embodiment, when described operational order for open file instruction time, first sent to other electronic whiteboards of conference group the file needing to be performed opening operation by the electronic whiteboard that operates, open file described in then sending instruction.
A kind of synchronization of electronic whiteboards system, for synchronization of electronic whiteboards, described electronic whiteboard comprising blank main body for writing, being located at the touch sensible assembly of described blank main body surrounding, for by image projection to the projecting subassembly in blank main body and the control assembly controlling touch sensible assembly and projecting subassembly collaborative work, it is characterized in that, described synchronization of electronic whiteboards system comprises:
Communication module, to establish a communications link formation conference group at least two electronic whiteboards;
Initialization module, for when conference group is formed, makes initialization process to electronic whiteboard;
Operation identification module, for when there is user operation, according to the order of user operation generating run;
Described communication module is also for sending described operational order or receiving the operational order sent from other electronic whiteboards to other electronic whiteboards of conference group;
Operation executing module, for responding described operational order.
Wherein in an embodiment, described communication module is for sending invitation or receiving invitation; Wherein, described electronic whiteboard is endowed unique identifying number.
Wherein in an embodiment, described operation identification module is clicked and slide for identifying, and:
Writing region according to sliding trace generation or erasing trace graphics;
Relative sliding Track Pick-up according to multiple spot zooms in or out instruction;
Click according to the single of menu area and generate menu instructions;
According to the single on file icon or two time click generation and to open file instruction.
Wherein in an embodiment, described communication module is used for: when described operational order for generate or wipe trace graphics, zoom in or out instruction and menu instructions time, other electronic whiteboards to conference group directly send described operational order.
Wherein in an embodiment, described communication module is used for: when described operational order for open file instruction time, first other electronic whiteboards to conference group send the file needing to be performed opening operation, to open file instruction described in then sending.
Above-mentioned electric white board synchronous method and system, only need to transmit the operational order taking less bandwidth in synchronizing process, thus rapidly synchronous, and simultaneously by identical initialization, synchronizing content is guaranteed.
Accompanying drawing explanation
Fig. 1 is the structural representation of electronic whiteboard;
Fig. 2 be Fig. 1 electronic whiteboard between synchronous method flow chart;
Fig. 3 is blank main body in Fig. 1 Region dividing schematic diagram when presenting display frame;
Fig. 4 is the synchronization of electronic whiteboards system module figure of an embodiment.
Embodiment
Fig. 1 is the structural representation of electronic whiteboard.Electronic whiteboard 10 comprising blank main body 100 for writing, being located at the touch sensible assembly 200 of described blank main body 100 surrounding, for by image projection to the projecting subassembly 300 in blank main body 100 and the control assembly 400 controlling touch sensible assembly 200 and projecting subassembly 300 collaborative work.
Blank main body 100 is generally the solid plate of rectangle, and material is not limit, and is generally white, is therefore called blank for the surface projected or write.Touch sensible assembly 200 mainly comprises the sensing unit and related circuit that are arranged on blank main body 100 surrounding, for responding to writing implement and positioning the position of writing implement in blank main body 100, usually adopts infrared induction.Projecting subassembly 300 can by image projection in blank main body 100, and picture can be the picture of control assembly 400 output or the picture of the collection of other equipment or output, the picture of such as camera collection.Control assembly 400 operation in blank main body 100 can form feedback based on the picture be presented in blank main body 100 and user, such as, on original picture, superpose written contents, jump to other picture etc. according to operation.
At least two above-mentioned electronic whiteboards 10 communicate to connect mutually, can form conference system.This conference system can be used for including but not limited to teaching, teleconference etc.Based on this conference system, provide the electric white board synchronous method of an embodiment.As shown in Figure 2, the method comprises the steps.
Step S101: at least two electronic whiteboards establish a communications link formation conference group.The mode established a communications link can with reference to following steps:
Invited at least one electronic whiteboard initiating conference by an electronic whiteboard, when the electronic whiteboard that at least one is invited to accepts described invitation, the electronic whiteboard that initiating conference is invited forms the conference group that can intercom mutually with the electronic whiteboard accepting invitation; Wherein, each electronic whiteboard is endowed unique identifying number, and the electronic whiteboard of initiating to invite searches the electronic whiteboard of wishing to invite by described unique identifying number.
In other embodiments, other modes also can be adopted to form conference group, such as at least one electronic whiteboard all sends meeting application to same main electronic whiteboard, and the electronic whiteboard obtaining this main electronic whiteboard agreement can add conference group.Again such as, more polyelectron blank is progressively invited to add meeting with electronic whiteboard with chain or branched form.The mode forming conference group does not limit at this.
Communication mode between electronic whiteboard can adopt the tcp/ip communication agreement based on Internet to communicate.
Step S102: when conference group is formed, the electronic whiteboard participated in makes identical initialization process.The synchronous method of the present embodiment needs the electronic whiteboard making conference participation to possess same operating environment, so just can possess basis that can be synchronous.Therefore, when conference group is formed, the electronic whiteboard of all conference participations all makes identical initialization process.Initialization process comprises: show identical initial picture, provide identical operating right etc.The initialization of electronic whiteboard is the processing procedure of electronic whiteboard itself, does not therefore need through Internet Transmission picture data.After initialization process, the electronic whiteboard of all conference participations is by picture identical for display.
Step S103: when there is user operation, by the electronic whiteboard that operates according to the order of user operation generating run.Electronic whiteboard demonstration, normally as the miscellaneous function of language explanation, therefore in the process of meeting, can be operated electronic whiteboard by user, transmit image information to other participants.When operated by the user, can according to the order of user operation generating run by the electronic whiteboard operated.The user of such as one of them electronic whiteboard needs Freehandhand-drawing figure to the implication of other participants more clearly representation language, it can paint in blank main body 100, and electronic whiteboard forms a hand-drawing graphics according to the track that it is painted and is projected in blank main body 100.
Concrete, user operation generally comprises to be clicked and slides.By click and slide can be formed as generate or erasing trace graphics, amplify, reduce, menu instructions and the instruction etc. that opens file.
Projected picture after initialization, comprise occupy blank main body 100 larger area write region 102, also provide menu area 104 simultaneously, can with reference to figure 3.Fig. 3 is a kind of informative example, writes region 102 and menu area 104 can according to circumstances divide in reality, and such as menu area 104 on the top of display frame, left side or right side, can also can also be breathed out in writing process.Separately, menu area 104 may be also the operable area in application program picture, the operable area of such as word, ppt.
For in the user operation of writing region 102 and menu area 104, different operational orders can be generated.As:
Carry out slide writing region, can generate according to sliding trace or erasing trace graphics.And clicking operation generally can generate or wipe the image of a point.Therefore the slide writing region can be used for carrying out marking, writing or these marked, write erasing etc. in display frame.
Relative sliding according to multiple spot operates, and what can generate zooms in or out instruction.Finger relative motion when sliding of such as two hands, can generate and reduce instruction, whole picture is reduced display.The finger of two hands is unlucky dynamic in slip phase, can generate amplification instruction, whole picture is amplified display.
Carry out single clicking operation in menu area, the menu instructions that this region indicates can be generated according to the position clicked.Such as show in menu area the icon that operational order is commonly used in multiple expression, each icon occupies certain region, occupies in region click at it, and can generate corresponding operational order.
Normally, region all right display file folder picture is being write.Multiple file may be shown under file, can write at folder picture or mark.Meanwhile, file icon can also perform single or two clicking operation, can the instruction that opens file be generated according to this single or two clicking operation.
Based on above-mentioned generation or erasing trace graphics, amplify, reduce, menu instructions and the instruction etc. that opens file can complete all demands needed for conference presentation.
Step S104: sent described operational order to other electronic whiteboards of conference group by the electronic whiteboard that operates.A participant is when operating the electronic whiteboard of oneself wherein, and the operational order generated also can send to other electronic whiteboards.Wherein, above-mentioned generation or erasing trace graphics, amplify, reduce, menu instructions can directly send.The instruction that opens file is then different.The file of demonstrator other participants may not have, when operational order for open file instruction time, first sent this file on backstage to other electronic whiteboards by the electronic whiteboard that operates, then send this instruction that opens file.In the process, first can be suspended execution by the electronic whiteboard operated and to open file instruction, treat that this file is sent completely and perform again.
It should be noted that, the operation transferring file is by not completed by the special menu instruction transmitted, and in the process transferring file, in the display frame of demonstrator, temporarily show the picture transferring file, this picture is not synchronous with other participants, and question paper turns back to synchronizing picture after having transferred again.
File Open has two kinds of modes:
Before meeting starts, existing of file needed for meeting being joined electronic whiteboard is called the functional areas of bookcase, the file of these functional areas can be automatically synchronous with all participants on backstage, if synchronously completed, opening operation only needs move instruction just can complete to open in fact.
If transfer other external files on hard disk in meeting temporarily, then other participants need the time of wait just can open, temporary transient picture may synchronously some postpone, the opening time of file is relevant with size, the File Open of a such as 2-3M may need tens seconds, so the file opened in meeting is unsuitable excessive.
In general, need the file by opening temporarily unsuitable excessive, otherwise participant should be sent in advance.
Step S105: all electronic whiteboards of conference group all respond described operational order.Because initial operating environment is the same, the result of all electronic whiteboards performed by this operational order also will be the same.Then the further operation on same operating result, also will generate the same further operating result.Finally can realize the simultaneous display of all electronic whiteboards.
With an example, said method is described below.
User A (such as teacher) is dialled to the electronic whiteboard b of user B (such as student) by electronic whiteboard a, invites meeting.User B is accepted the invitation by electronic whiteboard b, and electronic whiteboard a and electronic whiteboard b forms conference group.Electronic whiteboard a and electronic whiteboard b carries out initialization, supposes the display frame defined as shown in Figure 3.
User A needs to tell user B how a Chinese character is write by character calligraph, user A writes this Chinese character in the region of writing on electronic whiteboard a, handwriting trace is sent to electronic whiteboard b by electronic whiteboard a, after electronic whiteboard a and electronic whiteboard b all responds this handwriting trace, be projected in by the trace graphics of formation in blank main body, the Chinese character that user A writes on electronic whiteboard a also appears on the electronic whiteboard b of user B.
User A will illustrate the usage of this Chinese character further to user B, relevant example sentence is kept at a as in word or ppt of teaching notes.User A operates electronic whiteboard a and transfers this teaching notes file, performs opening operation simultaneously.Electronic whiteboard a sends this teaching notes file and opening operation instruction on backstage to electronic whiteboard b, to be sent complete after, electronic whiteboard b automatically performs and opens teaching notes file.Now there is the teaching notes file opened in user A on the electronic whiteboard b of electronic whiteboard a and user B simultaneously.
On this basis, user A can perform the operational order of this teaching notes file, as scroll through pages, also can carry out marking and writing.The operational order that user B equally also can perform this teaching notes file is gone forward side by side rower note and writing.
Above-mentioned synchronous method, only needs to transmit the operational order taking less bandwidth in synchronizing process, thus rapidly synchronous, and simultaneously by identical initialization, synchronizing content is guaranteed.
As shown in Figure 4, be the synchronization of electronic whiteboards system module figure of an embodiment.Synchronous between the electronic whiteboard 10 of this synchro system 20 for previous embodiment.This synchro system runs on control assembly 400 usually.
Synchronization of electronic whiteboards system 20 comprises: communication module 210, initialization module 220, operation identification module 230 and operation executing module 240.Communication module 210 to establish a communications link formation conference group at least two electronic whiteboards; Initialization module 220, for when conference group is formed, makes initialization process to electronic whiteboard; Operate identification module 230 for when there is user operation, according to the order of user operation generating run; Communication module 210 is also for sending described operational order or receiving the operational order sent from other electronic whiteboards to other electronic whiteboards of conference group; Operation executing module 240 is for responding described operational order.
Communication module 210, initialization module 220, operation identification module 230 and the specific implementation of operation executing module 240 can refer to the embodiment of aforementioned synchronization method.
Communication module 210 is for sending invitation or receiving invitation; Wherein, described electronic whiteboard is endowed unique identifying number.Communication module 210 also for: when described operational order for generate or wipe trace graphics, zoom in or out instruction and menu instructions time, other electronic whiteboards to conference group directly send described operational order.Communication module 210 also for: when described operational order for open file instruction time, first other electronic whiteboards to conference group send the file needing to be performed opening operation, to open file instruction described in then sending.
Operation identification module 230 is clicked and slide for identifying, and: writing region according to sliding trace generation or erasing trace graphics; Relative sliding Track Pick-up according to multiple spot zooms in or out instruction; Click according to the single of menu area and generate menu instructions; According to the single on file icon or two time click generation and to open file instruction.
The above embodiment only have expressed several execution mode of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection range of patent of the present invention should be as the criterion with claims.
Claims (10)
1. an electric white board synchronous method, it is characterized in that, based on the conference system comprising the electronic whiteboard that at least two communicate to connect mutually, described electronic whiteboard comprising blank main body for writing, being located at the touch sensible assembly of described blank main body surrounding, for by image projection to the projecting subassembly in blank main body and the control assembly controlling touch sensible assembly and projecting subassembly collaborative work, described method comprises the steps:
At least two electronic whiteboards establish a communications link formation conference group;
When conference group is formed, the electronic whiteboard participated in makes identical initialization process;
When there is user operation, by the electronic whiteboard that operates according to the order of user operation generating run;
Described operational order is sent to other electronic whiteboards of conference group by the electronic whiteboard that operates;
The all electronic whiteboards of conference group all respond described operational order.
2. electric white board synchronous method according to claim 1, is characterized in that, described at least two electronic whiteboards establish a communications link and form the step of conference group and comprise:
Invited at least one electronic whiteboard initiating conference by an electronic whiteboard, when the electronic whiteboard that at least one is invited to accepts described invitation, the electronic whiteboard that initiating conference is invited forms the conference group that can intercom mutually with the electronic whiteboard accepting invitation;
Wherein, each electronic whiteboard is endowed unique identifying number, and the electronic whiteboard of initiating to invite searches the electronic whiteboard of wishing to invite by described unique identifying number.
3. electric white board synchronous method according to claim 1, is characterized in that, described user operation comprises to be clicked and slide, and described operational order comprises:
Writing region according to sliding trace generation or erasing trace graphics;
Instruction is zoomed in or out according to the relative sliding Track Pick-up of multiple spot;
Single according to menu area clicks the menu instructions generated;
The instruction that opens file generated is clicked according to the single on file icon or two times.
4. electric white board synchronous method according to claim 3, it is characterized in that, when described operational order for generate or wipe trace graphics, zoom in or out instruction and menu instructions time, directly sent described operational order by the electronic whiteboard that operates to other electronic whiteboards of conference group.
5. electric white board synchronous method according to claim 3, it is characterized in that, when described operational order for open file instruction time, first sent to other electronic whiteboards of conference group the file needing to be performed opening operation by the electronic whiteboard that operates, open file described in then sending instruction.
6. a synchronization of electronic whiteboards system, for synchronization of electronic whiteboards, described electronic whiteboard comprising blank main body for writing, being located at the touch sensible assembly of described blank main body surrounding, for by image projection to the projecting subassembly in blank main body and the control assembly controlling touch sensible assembly and projecting subassembly collaborative work, it is characterized in that, described synchronization of electronic whiteboards system comprises:
Communication module, to establish a communications link formation conference group at least two electronic whiteboards;
Initialization module, for when conference group is formed, makes initialization process to electronic whiteboard;
Operation identification module, for when there is user operation, according to the order of user operation generating run;
Described communication module is also for sending described operational order or receiving the operational order sent from other electronic whiteboards to other electronic whiteboards of conference group;
Operation executing module, for responding described operational order.
7. synchronization of electronic whiteboards system according to claim 6, is characterized in that, described communication module is for sending invitation or receiving invitation; Wherein, described electronic whiteboard is endowed unique identifying number.
8. synchronization of electronic whiteboards system according to claim 6, is characterized in that, described operation identification module is clicked and slide for identifying, and:
Writing region according to sliding trace generation or erasing trace graphics;
Relative sliding Track Pick-up according to multiple spot zooms in or out instruction;
Click according to the single of menu area and generate menu instructions;
According to the single on file icon or two time click generation and to open file instruction.
9. synchronization of electronic whiteboards system according to claim 8, it is characterized in that, described communication module is used for: when described operational order for generate or wipe trace graphics, zoom in or out instruction and menu instructions time, other electronic whiteboards to conference group directly send described operational order.
10. synchronization of electronic whiteboards system according to claim 8, it is characterized in that, described communication module is used for: when described operational order for open file instruction time, first other electronic whiteboards to conference group send the file needing to be performed opening operation, and open file described in then sending instruction.
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| CN105589606A (en) * | 2015-11-17 | 2016-05-18 | 苏州久腾光电科技有限公司 | Interactive electronic whiteboard with video communication function |
| CN106020681A (en) * | 2016-05-05 | 2016-10-12 | 乐视控股（北京）有限公司 | Method and system for acquiring and projecting painting through touch screen |
| WO2017032205A1 (en) * | 2015-08-27 | 2017-03-02 | 华为技术有限公司 | Control method, apparatus, and system for electronic whiteboard |
| CN106534188A (en) * | 2016-12-14 | 2017-03-22 | 上海溢米教育科技有限公司 | Classroom operation track synchronization method and system |
| CN106790547A (en) * | 2016-12-23 | 2017-05-31 | 维沃移动通信有限公司 | A kind of PPT sharing methods and mobile terminal |
| CN106843797A (en) * | 2017-03-13 | 2017-06-13 | 广州视源电子科技股份有限公司 | Editing method and device for image file |
| CN107370982A (en) * | 2017-08-15 | 2017-11-21 | 北京北纬天辰科技有限公司 | Tele-conferencing system based on electronic whiteboard |
| CN107959707A (en) * | 2016-10-18 | 2018-04-24 | 艾替及贝斯克有限公司 | Real time content provides method and system |
| US9998883B2 (en) * | 2015-09-30 | 2018-06-12 | Nathan Dhilan Arimilli | Glass pane for collaborative electronic communication |
| CN109324745A (en) * | 2018-08-02 | 2019-02-12 | 广州视源电子科技股份有限公司 | Whiteboard operation method, whiteboard operation device, whiteboard operation system, whiteboard device and medium |
| CN109617862A (en) * | 2018-11-21 | 2019-04-12 | 北京北纬天辰科技有限公司 | A kind of electronic whiteboard conference interactive approach and interaction systems |
| CN110333837A (en) * | 2019-07-09 | 2019-10-15 | 京东方科技集团股份有限公司 | Conference system, communication means and device |
| CN110413242A (en) * | 2019-07-01 | 2019-11-05 | 广州视源电子科技股份有限公司 | Electronic whiteboard synchronization method and device, terminal equipment and storage medium |
| CN111355700A (en) * | 2019-06-27 | 2020-06-30 | 鸿合科技股份有限公司 | Network whiteboard sharing method and system and electronic equipment |
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