CN116206494A - Intelligent electronic blackboard system with electronic projection screen function - Google Patents

Abstract

The invention provides an intelligent electronic blackboard system with an electronic projection screen function, which comprises a hardware system, a software system and an electronic document of teaching materials; the hardware system comprises a computer host and electronic display equipment with a touch control function; the software system comprises a blackboard module, a data display annotating module and other auxiliary teaching modules, and is characterized by also comprising a projection function module; the projection function module comprises an electronic projection screen, a control module, an electronic projection screen presentation sub-module, an electronic projection screen movement sub-module, a teaching data display sub-module and a projection teaching data annotation sub-module; the projection function module simulates the presentation of a common projection curtain and completes the function similar to projection teaching by using the form of the electronic curtain (electronic projection curtain) on the electronic blackboard, and can complete teaching better and more conveniently in cooperation with the electronic blackboard.

Description

Intelligent electronic blackboard system with electronic projection screen function

Technical Field

The invention relates to the technical field of multimedia teaching equipment, in particular to an intelligent electronic blackboard system comprising an electronic projection screen and functions.

Background

Along with the rapid development and popularization of computer technology and electronic display technology touch technology, teaching writing display equipment used in classroom teaching has gradually evolved from a traditional blackboard to a liquid crystal touch integrated machine interactive electronic whiteboard (blackboard) through a green board-whiteboard-multimedia projection-projection interactive electronic whiteboard.

At present, an interactive electronic whiteboard (blackboard) of a liquid crystal touch integrated machine becomes an important component of classroom teaching in universities and middle schools, and particularly, a scheme of the multi-screen interactive electronic whiteboard (blackboard) is more attractive, and application and popularization are indispensible. It is needless to say that the multi-screen electronic blackboard can display interface contents of the electronic blackboard and the general purpose computer in a split screen mode, that is, the functions of the multi-screen scheme have completely replaced the combination of the general blackboard and the projection device. However, through a large number of researches on the use condition of the interactive electronic whiteboard (blackboard) of the multi-screen liquid crystal touch integrated machine, the following findings are made: the teaching material electronic document display function is used, and the electronic whiteboard (blackboard) state is required to be changed into the computer state (desktop) for use. The state conversion and the subsequent operation control of the data also inherit all the characteristics of the computer (corresponding) software operation, and the teaching has the problems of complexity and inconvenience. In one sentence, the conventional system has realized the core function of projection display data, but has the problem of inconvenience, and the invention aims to solve the problem of inconvenience.

Disclosure of Invention

The purpose of the invention is that: in the process of teaching by using the electronic blackboard, the electronic blackboard is used for presenting a projection screen which is completely similar to the past, and electronic teaching materials are directly opened on the projection screen to complete the information display, writing and teaching, so that the electronic blackboard spans the use of a computer desktop and the complicated operation control of the information software, and better teaching experience and a more convenient teaching mode are brought to teachers.

In order to achieve the above purpose, the present invention provides the following technical solutions:

an intelligent electronic blackboard system comprises a hardware system and a software system, and electronic documents of teaching materials; the hardware system comprises a computer host and electronic display equipment with a touch control function; the software system comprises a blackboard module, a data display annotating module and other auxiliary teaching modules; the software system also comprises a projection function module; the projection function module simulates the projection curtain to present and complete the function similar to projection teaching in the form of an electronic curtain (electronic projection curtain) on an electronic blackboard. The electronic projection curtain is used for simulating the common projection curtain and has the advantages that: 1. the habit of using a common blackboard and common projection teaching in the past is accepted; 2. the function state of the blackboard is not changed on the electronic blackboard, namely, the electronic blackboard does not need to be connected to a common computer desktop, and the projection screen is directly displayed on the blackboard, so that the fusion of the writing advantages of the traditional blackboard and the teaching material advantages of modern electronic presentation is simply and conveniently realized.

The projection function module comprises an electronic projection screen, a control module, an electronic projection screen presentation sub-module, an electronic projection screen movement sub-module and a teaching data display sub-module; and the projection teaching data annotating sub-module.

The electronic projection screen is a rectangular display area in the electronic blackboard which is completely consistent with the display effect of the common projection screen and has a size and a display position which are variable according to the requirement, and the electronic projection screen can be used for partially hiding, partially displaying and integrally displaying according to the requirement. The change of the size presentation position is generally determined according to the visual effect of students in the teaching environment; the whole presentation is realized when the teaching data is required to be explained in the teaching process, and the whole presentation or the partial presentation can be hidden when the teaching data is not required to be explained in the teaching process. The electronic projection screen comprises a teaching material electronic document display area which is used for displaying (playing) the teaching material electronic document and providing an annotation writing area together with the projection teaching material annotation submodule during the playing of the teaching material; the electronic projection screen also comprises a teaching material electronic document playing control area which is arranged for realizing presentation control of the electronic projection screen, selection of the teaching material electronic document and display, playing and writing control of the teaching material electronic document; to accomplish these functions, the play control area includes a screen drop (stow) button, a screen size change button, a screen presentation position change button, an open teaching material electronic document button, a play button, a back, forward, to first page, to last page buttons, the functions of which are accomplished by the call control module; the electronic document display area of teaching material takes up most of the upper area of the electronic projection screen in rectangular shape, the electronic document playing control area of teaching material takes up the lower area in strip-shaped rectangular shape, their width is the same, the height ratio is very large, can be about 15:1 generally. Therefore, when the teaching material electronic document display area is locally hidden and the teaching material electronic document playing control area is locally presented, the visual effect of folding the projection screen can be provided above the blackboard, and the effect can be called as the initial state of the electronic projection screen. It should be noted that, in order to make the teacher more convenient to control the playing of the teaching material when playing the teaching material, four buttons of the "back, forward, to the first page, to the last page" in the electronic document playing control area of the teaching material are enlarged and placed in the electronic document display area of the teaching material at positions suitable for the teacher to operate.

The control module is the core of the whole projection function module, is called by a function button in a teaching data electronic document playing control area, firstly recognizes the function button, and then completes the pull-down, the retraction and the projection screen display position size change of the projection screen and the selection, the display, the playing and the writing control of the teaching data electronic document by calling the electronic projection screen display sub-module, the electronic projection screen moving sub-module, the teaching data display sub-module and the projection teaching data annotation sub-module.

The electronic projection screen presentation sub-module is called by the control module and completes presentation of the projection screen with a specific size on a specific position according to the position size parameter of the electronic projection screen transmitted by the control module.

The electronic projection screen moving submodule is called by the control module to finish the position parameter change of the electronic projection screen on the electronic blackboard, and then the control module calls the electronic projection screen presenting submodule to realize the movement (position change) of the electronic projection screen. There are two ways in which the electronic projection screen moves: 1. the electronic projection screen can be continuously moved up and down, and the electronic projection screen can be pulled down and retracted as a common projection screen by the movement; 2. the left and right positions are discontinuously changed, and the movement is used for providing better visual effect for students in the teaching environment.

The teaching material display submodule comprises an electronic teaching document file opening dialog box, which is a computer universal file opening dialog box for opening specific file types, wherein the specific types which can be opened are office documents, PDF documents, images in various formats and images captured by real-time object exhibition stands (or cameras) of Word, PPT, EXCEL and the like contained in the teaching material electronic document, and the electronic teaching document file opening dialog box is used for selecting the teaching document; the teaching material display sub-module further comprises an office document display module which is used for displaying and playing an office document on the electronic projection screen; the system also comprises a physical exhibition stand display module which is used for displaying and playing the teaching contents shot by the physical exhibition stand camera on the electronic projection screen; the system also comprises a pdf document display module which is used for displaying and playing the pdf document on the electronic projection screen; the system also comprises various format image and image picture display modules which are used for displaying and playing various format image pictures on the electronic projection screen; the teaching material display sub-module selects to open the teaching document through the electronic teaching document file opening dialog box, further judges the type of the opened document, and calls the corresponding document display module to display the document according to the type of the opened document. The real-time image of the real-time exhibition stand (or camera) is opened by selecting a specific file on the computer desktop. The teaching document display module in the teaching document display sub-module has two kinds of operation on the document, one is opened, the other is played, the two kinds of operation are corresponding to two different presentation states, one is an initial state after being opened, and the other is a play state.

The projection teaching material annotating sub-module calls the corresponding document display module to play the document when receiving a command of a play button of a play control area of the teaching material electronic document by the control module, and the annotation writing of the teaching material electronic document is completed during playing.

In the intelligent electronic blackboard system, the teaching material electronic document is an office document such as Word, PPT, EXCEL, a PDF document, various formats of images, images and images captured by a real-time display table (or a camera).

The application method of the intelligent electronic blackboard system comprises the following steps:

1) Storing the teaching material electronic document file in a computer (desktop or hard disk) of the intelligent electronic blackboard system; or connecting a teaching material electronic document carrier (U disk, etc.) with a computer of the electronic blackboard system; if the electronic document of teaching material is the image of real-time exhibition stand (or camera), the real-time exhibition stand (or camera) is connected to the computer of electronic blackboard system, and a special icon file representing camera is copied to the computer desktop, and the real material (book or other real material) to be displayed is placed under the exhibition stand or camera. The connection of the physical exhibition stand (or the camera) and the copy of a special icon file representing the camera to the computer desktop are not needed to be carried out every time of lesson, and the connection is disposable, so long as the special icon file is connected, well connected and arranged on the desktop, and the displayed physical data (books or other physical data) can be placed under the exhibition stand or the camera when the computer desk or the camera is used every time;

2) Starting an intelligent electronic blackboard system;

3) The blackboard module presents an electronic blackboard, after the electronic blackboard is presented, a control module in the projection function module is called to further call the electronic projection screen presenting sub-module to present the initial state of the electronic projection screen in a mode of hiding a teaching material electronic document display area to expose a teaching material electronic document playing control area at a specific position above the electronic blackboard by using a specific size;

4) When a teacher needs to display and play the content of the electronic document of the teaching material in the teaching process of using the electronic blackboard, clicking a push-down (stow) button of the projection screen of the playing control area of the electronic document of the teaching material, and completing the complete presentation of the electronic projection screen by using the investigation control module and the electronic projection screen moving submodule;

5) Under the condition that the electronic projection screen is completely presented, a teacher can change the size, position and presentation state of the projection screen by a projection screen pull-down (folding) button, a projection screen size changing button and a projection screen presentation position changing button of a teaching data electronic document playing control area on the electronic projection screen according to requirements; the control module can be invoked to complete the selection, display, play and writing control of the electronic document of the teaching material by opening the buttons of the electronic document of the teaching material, the play button, the back, forward, to the first page and to the last page;

6) When a teacher uses the electronic document of the teaching material, and does not need to display a larger blackboard area for playing the electronic document of the teaching material, clicking a projection screen pull-down (folding) button, and folding the electronic projection screen to an initial state by using an investigation control module and an electronic projection screen moving submodule.

Compared with the prior art, the invention has the beneficial effects that: the intelligent electronic blackboard system comprises a projection function module, comprises a projection screen in an electronic flat display form and a control module for displaying teaching materials, and achieves the purposes that when the electronic blackboard is used, the state of the blackboard is not required to be changed, the teaching materials are directly used by the habit of using projection in the past, the fusion of the traditional blackboard writing teaching and the teaching materials presented by the modern electronic technology is truly achieved, and better teaching experience and a more convenient teaching mode are brought to teachers.

Drawings

FIG. 1 is a schematic diagram of a hardware system connection of the present invention

FIG. 2 is a schematic diagram of the software system of the present invention

FIG. 3 is a schematic view of an electronic projection screen on a blackboard

FIG. 4 shows an electronic projection screen in different sizes and different positions

FIG. 5 is a schematic view showing the state of the electronic projection screen in a partially hidden and partially presented state, a fully presented state and an initial presentation state

FIG. 6 is a schematic diagram of the structure and function of an electronic projection screen

FIG. 7 control module flow chart

FIG. 8 is a schematic diagram of the teaching material display submodule (B) with the PPT document opened (A)

FIG. 9 is a schematic diagram showing an initial state and a playing state of an opened document in an electronic document display area of teaching materials

FIG. 10 is a schematic diagram of an electronic document of a selected PPT educational material

FIG. 11 is a schematic view of an electronic projection screen at four positions on an electronic blackboard

Detailed Description

The following is a further detailed description of the present invention with reference to the accompanying drawings.

A three-screen double-board intelligent electronic blackboard system comprises a hardware system and a software system, and teaching data electronic documents;

the teaching material electronic document is a PPT electronic teaching document in the example; the hardware system comprises an OPS plug-in type computer host with multiple display cards and three liquid crystal touch integrated machines with touch control functions, namely a left screen, a middle screen and a right screen, as shown in fig. 1, wherein the connection relations are as follows: the OPS plug-in type computer host is inserted into a left screen, the HDMI output of the OPS plug-in type computer host is connected with the HDMI input interface of a middle screen (liquid crystal touch integrated machine), the HDMI output interface of the left screen is connected with the HDMI input interface of a right screen, and the two USB input interfaces of the OPS plug-in type computer host are respectively connected with the touch signal output interfaces of the middle screen (liquid crystal touch integrated machine) and the right screen (liquid crystal touch integrated machine); the connection is a hardware scheme of the three-screen double-board intelligent electronic blackboard system, and the left and right screens of the three-screen double-board intelligent electronic blackboard system have consistent content and have writing functions.

The software system comprises a three-screen double-board blackboard module, a three-screen double-board data display annotation module and other auxiliary teaching modules; the software system also comprises a projection function module, as shown in fig. 2; the projection function module simulates the projection curtain to present and complete the function similar to projection teaching in the form of an electronic curtain (electronic projection curtain) on an electronic blackboard, and as shown in fig. 3, the projection function module simulates the common projection curtain and functions in the form of the electronic projection curtain, and has the following advantages: 1. the habit of using a common blackboard and common projection teaching in the past is accepted; 2. the function state of the blackboard is not changed on the electronic blackboard, namely, a common computer desktop is not needed, a projection screen can be displayed on the blackboard, and the fusion of the writing advantages of the traditional blackboard and the advantages of the modern electronic display teaching materials is conveniently realized.

In the three-screen double-board intelligent electronic blackboard system, the projection function module comprises an electronic projection screen (shown in figure 3), a control module, an electronic projection screen presentation sub-module, an electronic projection screen movement sub-module and a teaching data display sub-module; a projection teaching data annotating sub-module; as shown in fig. 2.

In the three-screen double-plate intelligent electronic blackboard system, the electronic projection screen is a rectangular display area in the electronic blackboard, the display effect of which is completely consistent with that of a common projection screen, the size of the rectangular display area can be changed between a half screen and a full screen, the display position of the rectangular display area can be changed on the middle screen and the left screen and the right screen according to the needs, as shown in fig. 4, the change of the size display position of the rectangular display area is generally determined according to the visual effect of students in a teaching environment, and the rectangular display area can be partially hidden for partial display and integrally display according to the needs, as shown in fig. 5. The whole presentation (called the electronic projection screen pulled-down state) when teaching data are required to be explained in the teaching process, and the whole presentation (called the electronic projection screen retracted state and the initial state of the electronic projection screen) can be hidden or partially hidden and partially presented when teaching data are not required to be explained in the teaching process is shown in fig. 5; the electronic projection screen comprises a teaching material electronic document display area for displaying (playing) the teaching material electronic document, as shown in fig. 6B, and is matched with the projection teaching material annotation sub-module to provide an annotation writing area during data playing, as shown in fig. 6B; the electronic projection screen also comprises a teaching material electronic document playing control area which is arranged for realizing presentation control of the electronic projection screen, selection of the teaching material electronic document and display, playing and writing control of the teaching material electronic document; to accomplish these functions, the play control area includes a screen drop (stow) button, a screen size change button, a screen presentation position change button, an open teaching material electronic document button, a play button, a back, forward, first page, last page buttons, the functions of which are accomplished by invoking the control module as shown in FIG. 6B; the teaching material electronic document display area takes up most of the upper area of the electronic projection screen in a rectangular shape, the teaching material electronic document playing control area takes up the lower area in a strip-shaped rectangular shape, the width of the teaching material electronic document display area and the teaching material electronic document playing control area are the same, the height ratio is large, and in the embodiment, the height ratio is 15:1, as shown in fig. 6B. Thus, when the teaching material electronic document display area is locally hidden and the teaching material electronic document playing control area is locally presented, a visual effect of folding the projection screen can be provided above the blackboard, and the effect can also be called as an initial state of the electronic projection screen, as shown in the upper diagram of fig. 5. In particular, in order to make the teacher more convenient to control the playing of the teaching material when playing the teaching material, in this example, four buttons of the "backward, forward, to the first page, to the last page" in the electronic document playing control area of the teaching material are enlarged and placed in the left middle position of the electronic document display area of the teaching material when playing the teaching material, so that the electronic document is more suitable for the teacher to operate-! As shown in fig. 6B (these four buttons may also be placed in the electronic document play control area of the instructional material).

The control module is the core of the whole projection function module, and is called by a function button in a teaching data electronic document playing control area and a button at the left middle part of a teaching data electronic document display area, the function button is firstly identified, and then the electronic projection screen display sub-module, the electronic projection screen moving sub-module, the teaching data display sub-module and the projection teaching data annotating sub-module are called to complete the functions of drawing down, folding, projection screen display position size change and the selection, display, playing and writing control of the teaching data electronic document, and the flow chart is shown in figure 7, and the functions of drawing down (folding) the button, changing the projection screen size button and changing the projection screen display position button are completed by calling the electronic projection screen display sub-module and the electronic projection screen moving sub-module.

The electronic projection screen presenting sub-module is called by the control module, and completes the presentation of the half-screen or full-screen projection screen at the middle screen or left and right screen positions according to the position parameters of the middle screen or left screen and the size parameters of the half-screen or full-screen of the electronic projection screen transmitted by the control module, and the presentation effect is shown in figures 4 and 5.

The electronic projection screen moving submodule is called by the control module to finish the position parameter change of the electronic projection screen on the middle screen or the left screen of the electronic blackboard, and in order to realize the movement of the macroscopic position of the projection screen, the control module needs to call the electronic projection screen presenting submodule to realize the position movement (position change) of the electronic projection screen on the middle screen or the left screen. There are two ways in which the electronic projection screen moves: 1. the electronic projection screen can be continuously moved up and down on the middle screen or the left screen and the right screen, and the electronic projection screen can be pulled down and retracted as a common projection screen; 2. discrete direct positional changes from the center screen to the left and right screens or vice versa, such movement of the electronic projection screen being such that the positional changes are presented in order to give the students a better visual effect in the teaching environment, as shown in fig. 4.

The teaching material display sub-module is called by the control module and comprises an electronic teaching document file opening dialog box, wherein the electronic teaching document file opening dialog box is a computer universal file opening dialog box for opening specific file types, and the specific types which can be opened are Word, PPT, EXCEL office documents, PDF documents, various formats of images, images and real object exhibition stands (or cameras) contained in the teaching material electronic document and used for selecting the teaching document. In the example, the PPT document is opened, and the file opening condition is shown in FIG. 8A; the teaching material display sub-module further comprises an office document display module which is used for displaying and playing an office document on the electronic projection screen; the system also comprises a physical exhibition stand display module which is used for displaying and playing the teaching contents shot by the physical exhibition stand camera on the electronic projection screen; the system also comprises a pdf document display module which is used for displaying and playing the pdf document on the electronic projection screen; the system also comprises various format image and image picture display modules which are used for displaying and playing various format image pictures on the electronic projection screen; the teaching material display sub-module selects to open the teaching document through an electronic teaching document file opening dialog box, further judges the type of the opened document, and calls a corresponding document display module according to the type of the opened document to display the document in a teaching material electronic document display area on an electronic projection screen; the teaching material display sub-module also calls a corresponding document display module to complete the playing and playing control of the document according to the document type displayed in the teaching material electronic document display area on the electronic projection screen; when the electronic document is played, the teaching data display sub-module is matched with the projection teaching data annotating sub-module to complete annotation writing of the teaching data electronic document; the flow chart is shown in fig. 8B. The real-time image of the real-time exhibition stand (or camera) is opened by selecting a specific file (such as 'camera ico') on the computer desktop. The teaching document display sub-module has two kinds of operation on the document, one is to open the document and display the teaching document on the electronic projection screen in the electronic document display area, one is to display the teaching document on the electronic projection screen in the electronic document display area, they also correspond to two different display states, one is the initial state after opening, and the other is the display state, as shown in fig. 9.

The projection teaching material annotating sub-module calls the corresponding document display module to play the document when receiving a command of a play button of a play control area of the teaching material electronic document by the control module, and the annotation writing of the teaching material electronic document during playing is completed, as shown in fig. 7 and 6B.

The teaching material electronic document is an office document such as Word, PPT, EXCEL, a PDF document, various formats of images, images and images shot by a real-time exhibition stand (or a camera), and the example is described by using a PPT document.

The application method of the three-screen double-plate intelligent electronic blackboard system comprises the following steps:

1) Storing the teaching material electronic document file in a computer (desktop or hard disk) of the intelligent electronic blackboard system; or connecting a teaching material electronic document carrier (U disk, etc.) with a computer of the electronic blackboard system; if the electronic document of teaching material is the image of real-time exhibition stand (or camera), the real-time exhibition stand (or camera) is connected to the computer of electronic blackboard system, and a special icon file representing camera is copied to the computer desktop, and the real material (book or other real material) to be displayed is placed under the exhibition stand or camera. The connection of the physical exhibition stand (or the camera) and a special icon file (such as 'camera ico') representing the camera are not required to be carried out every time when the computer desk is read, and the computer desk is disposable, so long as the computer desk is connected, well connected and the special icon file is arranged on the desk, and only the displayed physical data (books or other physical data) can be placed under the exhibition stand or the camera when the computer desk is used every time;

in the embodiment, PPT document data required by teaching is copy on a U disk and connected with a computer of an electronic blackboard system;

2) Starting a three-screen double-plate intelligent electronic blackboard system;

3) The three-screen double-board blackboard module presents a three-screen electronic blackboard, after the electronic blackboard is presented, a control module in the projection function module is called to further call an electronic projection screen presenting sub-module to present an electronic projection screen initial state in a mode of hiding a teaching material electronic document display area and exposing a teaching material electronic document playing control area by using a half-screen size at the right part position above the middle-screen electronic blackboard, as shown in fig. 1 and 5;

4) When a teacher needs to display and play the PPT content of the electronic document of the teaching material in the teaching process of using the three-screen double-plate electronic blackboard, clicking a projection screen pull-down (stow) button of a playing control area of the electronic document of the teaching material, calling a control module and an electronic projection screen moving submodule to complete the complete presentation of the electronic projection screen, as shown in fig. 5;

5) Under the condition that the electronic projection screen is completely presented, a teacher can call the control module to complete the selection of the electronic document of the teaching material by opening a button of the electronic document of the teaching material according to the needs, and a file dialog box is opened to open a certain PPT document as shown in FIG. 10. Then, a teacher can change the size, position and presentation state of the projection screen by a projection screen pull-down (folding) button, a projection screen size changing button and a projection screen presentation position changing button of a teaching data electronic document playing control area on the electronic projection screen according to requirements; the teacher can call the control module to complete the display, playing and writing control of the electronic document of the teaching materials through the buttons of the play button, the back button, the forward button, the first page button and the last page button according to the needs. As shown in fig. 3, 4, 6, 10;

6) When the teacher uses the teaching material electronic document and does not need to display a larger blackboard area for playing the teaching material electronic document, clicking a projection screen pull-down (folding) button, calling a control module and an electronic projection screen moving submodule to fold the electronic projection screen to the upper part of the electronic blackboard. There may be four situations: 1. the half screen size projection screen is retracted at the right upper part of the middle screen (the initial state of the electronic projection screen); 2. the full-screen size projection screen is retracted at the upper position of the middle screen; 3. the half screen size projection screen is folded at the right upper part of the left screen and the right screen; 4. the projection screen with the full screen size is folded at the upper parts of the left screen and the right screen; as shown in fig. 11. When a teacher uses the teaching material electronic document and does not need to display and play the teaching material electronic document content and a larger blackboard area is needed, the projection screen can be retracted to the initial state of the electronic projection screen through a projection screen pull-down (retraction) button, a projection screen size changing button and a projection screen presentation position changing button of the teaching material electronic document playing control area.

Claims (5)

1. An intelligent electronic blackboard system comprises a hardware system and a software system, and electronic documents of teaching materials; the hardware system comprises a computer host and electronic display equipment with a touch control function; the software system comprises a blackboard module, a data display annotating module and other auxiliary teaching modules; the software system is characterized by further comprising a projection function module; the projection function module simulates the presentation of a common projection curtain on an electronic blackboard in the form of an electronic projection curtain and completes the function similar to projection teaching.

2. The intelligent electronic blackboard system according to claim 1, wherein the projection function module comprises an electronic projection screen, a control module, an electronic projection screen presentation sub-module, an electronic projection screen movement sub-module and a teaching data display sub-module; a projection teaching data annotating sub-module;

the electronic projection screen comprises a teaching material electronic document display area which is used for displaying and playing the teaching material electronic document; the electronic document display control system comprises a display control module, a display control module and a display control module, wherein the display control module is used for displaying a display screen, and the display control module is used for displaying a display screen and displaying a display screen;

the control module is called by a function button in a teaching material electronic document playing control area, and the electronic projection screen presenting sub-module, the electronic projection screen moving sub-module, the teaching material displaying sub-module and the projection teaching material annotating sub-module are called to complete the drawing, the folding and the position change of the projection screen presenting, and the selection, the displaying, the playing and the writing control of the teaching material electronic document;

the electronic projection screen presentation sub-module is called by the control module to finish the presentation of the projection screen at a specific position;

the electronic projection screen moving submodule is called by the control module to finish the position movement of the projection screen on the electronic blackboard;

the teaching material display submodule comprises an electronic teaching document file opening dialog box for selecting a teaching document; the electronic projection screen also comprises an office document display module which is used for displaying and playing an office document on the electronic projection screen; the system also comprises a physical exhibition stand display module which is used for displaying and playing the teaching contents shot by the physical exhibition stand camera on the electronic projection screen; the system also comprises a pdf document display module which is used for displaying and playing the pdf document on the electronic projection screen; the system also comprises various format image and image picture display modules which are used for displaying and playing various format image pictures on the electronic projection screen;

the projection teaching material annotating sub-module is called by the control module and completes annotating writing of the teaching material electronic document during playing.

3. The intelligent electronic blackboard system according to claim 1 or 2, wherein the teaching material electronic document is Word, PPT, EXCEL office document, PDF document, various formats of images, real-time images captured by real-time exhibition stands.

4. A method of using an intelligent electronic blackboard system according to claim 1 or 2, including the steps of:

1) Storing the teaching material electronic document in a computer of an intelligent electronic blackboard system; or connecting the carrier of the teaching material electronic document with the computer of the electronic blackboard system; or connecting the physical exhibition stand with a computer of the electronic blackboard system, and copying a special icon file representing the camera to a desktop of the computer;

2) Starting an intelligent electronic blackboard system;

3) The blackboard module presents an electronic blackboard, after the electronic blackboard is presented, a control module in the projection function module is called to further call the electronic projection screen presenting sub-module to present the initial state of the electronic projection screen above the electronic blackboard in a mode of hiding the teaching material electronic document display area and exposing the teaching material electronic document playing control area;

4) When a teacher needs to display and play the electronic document content of the teaching materials in the teaching process of using the electronic blackboard, clicking a push-down or stow button of the projection screen of the playing control area of the electronic document of the teaching materials, and calling a control module and an electronic projection screen moving submodule to complete the complete presentation of the electronic projection screen.

5) Under the condition that the electronic projection screen is completely presented, a teacher calls a control module to complete the selection, display, playing and writing control of the electronic document of the teaching material through a projection screen pull-down or stow button, a projection screen size change button, a projection screen presentation position change button, a teaching material electronic document opening button, a play button, a backward, forward, a first page and a last page button of a teaching material electronic document playing control area on the electronic projection screen according to requirements;

6) When the teacher uses the teaching material electronic document and does not need to display a larger blackboard area for playing the teaching material electronic document, clicking a projection screen pull-down or stow button, and calling a control module and an electronic projection screen moving submodule to stow the electronic projection screen to an initial state.

5. The method of claim 4, wherein the electronic document of teaching material is Word, PPT, EXCEL office document, PDF document, various formats of images, real-time images of real-time exhibition stand.

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