CN103997632B - A kind of electronic whiteboard and optical projection system - Google Patents
A kind of electronic whiteboard and optical projection system Download PDFInfo
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- CN103997632B CN103997632B CN201410229335.0A CN201410229335A CN103997632B CN 103997632 B CN103997632 B CN 103997632B CN 201410229335 A CN201410229335 A CN 201410229335A CN 103997632 B CN103997632 B CN 103997632B
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- electronic whiteboard
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Abstract
The embodiment of the present invention provides a kind of electronic whiteboard and optical projection system, relates to electronic applications, while reducing the cost of electronic whiteboard, it is achieved that optical projection system and user's is mutual.Described electronic whiteboard includes: the first panel and multiple driving module；The plurality of driving module array is arranged in the side of described first panel；Described driving module includes inductance, change-over circuit and light emitting diode, and described inductance inductive electromagnetic signal also produces induced-current, and described change-over circuit carries out rectification to described induced-current, and the induced-current after rectification triggers described light emitting diode and launches optical signal.
Description
Technical field
The present invention relates to electronic applications, particularly relate to a kind of electronic whiteboard and optical projection system.
Background technology
Interactive electric whiteboard is that a kind of Digital Teaching demonstration substituting traditional blackboard and chalk sets
Standby.Interactive electric whiteboard can completely disengage from mouse and keyboard, uses finger or specific pen
Electronic whiteboard realizes the editor to computer documents, annotates and the operation such as preservation, thus give
User brings great convenience.
In the prior art, interactive electric whiteboard generally uses additional input screen man-machine to realize
Alternately.Wherein, input screen can be divided into condenser type input screen, resistance-type input screen, or infrared
Technology input screen etc..Condenser type input screen is the screen body being made up of four layers of combined screen: the of outermost
One layer is glassivation, and the second layer is conductive layer, and third layer is nonconducting glassy layer,
Interior the 4th layer is also conductive layer.The structure of resistance-type input screen is by film, glass and thin
ITO (Indium Tin Oxide, nano indium tin burning on film and the adjacent one side of glass
Thing) coating composition.The structure of infrared technique input screen is by the infrared ray being contained on touch-screen housing
Launch sensing element and receive sensing element composition.It can thus be seen that condenser type input screen,
The structure of resistance-type input screen and infrared technique input screen is complicated, causes the cost of electronic whiteboard relatively
High；Again due to the element used or material expensive, thus it is white to further increase electronics
The cost of plate.And electronic whiteboard function that on market, some prices are less expensive is single, it is difficult to realize
Mutual with user.
Summary of the invention
Embodiments of the invention provide a kind of electronic whiteboard and optical projection system, are reducing electronic whiteboard
Cost while, the mutual of optical projection system and user can be realized again.
For reaching above-mentioned purpose, embodiments of the invention adopt the following technical scheme that
Embodiments provide a kind of electronic whiteboard, including: the first panel and multiple driving
Module；The plurality of driving module array is arranged in the side of described first panel；Described driving
Module includes inductance, change-over circuit and light emitting diode, and described inductance inductive electromagnetic signal also produces
Raw induced-current, described change-over circuit carries out rectification to described induced-current, the sensing after rectification
Light emitting diode described in current trigger launches optical signal.
Optionally, the two ends of described inductance are connected with two inputs of described change-over circuit respectively；
The positive pole of described light emitting diode is connected with the cathode output end of described change-over circuit；Described luminescence
The negative pole of diode is connected with the cathode output end of described change-over circuit.
Optionally, described driving module also includes: resistance and electric capacity；Described change-over circuit is just
Pole output is connected with the positive pole of described light emitting diode by described resistance；Bearing of described electric capacity
Pole is connected with the negative pole of described light emitting diode；The positive pole of described electric capacity and described light emitting diode
Positive pole connect.
Optionally, also include: the second panel；The plurality of driving module is positioned at described first
Between plate and described second panel.
Optionally, described second panel includes the panel of transparent material.
Embodiments provide a kind of optical projection system, including: electronic whiteboard, picture pick-up device,
Processing equipment and projector equipment；Described electronic whiteboard is the electronic whiteboard described in above-described embodiment,
Trigger light emitting diode according to the electromagnetic signal sensed and launch optical signal；Described picture pick-up device,
For obtaining the image information of described electronic whiteboard；Described processing equipment, is used for producing projection letter
Breath also adjusts described projection information according to described image information；Described projector equipment, for adjusting
Projection information projection after whole is to described electronic whiteboard.
Optionally, described processing equipment, specifically for described image information is processed,
To the coordinate information of described optical signal, and according to described coordinate information, described projection information is carried out
Adjust.
Optionally, described processing equipment, specifically for described image information is processed,
To the motion track of described optical signal, and according to described motion track, described projection information is carried out
Adjust.
Optionally, described picture pick-up device includes charge coupled cell CCD.
Embodiments provide a kind of electronic whiteboard and optical projection system, described electronic whiteboard bag
Including: the first panel and multiple driving module, wherein, multiple driving module arrays are arranged in first
The side of panel, multiple driving modules include inductance, change-over circuit and light emitting diode, inductance
For inductive electromagnetic signal, and produce induced-current, now, the sensing of generation at inductance two ends
Electric current is alternating current, so needing to change-over circuit, the input of this induced-current is carried out rectification,
And then trigger light emitting diode transmitting optical signal by the DC current after rectification.Can be seen that this
The electronic whiteboard of invention design is only by one piece of panel and by inductance, change-over circuit, light emitting diode
The driving module composition constituted, its material and the low price of components and parts, simple in construction, thus
Reduce the cost of electronic whiteboard.The optical projection system that the embodiment of the present invention provides, is set by shooting
The standby image information obtaining electronic whiteboard, obtains user for electronic whiteboard according to this image information
Operational order, and this instruction is responded, projection information is adjusted and projects to electricity
Sub-blank, thus realize man-machine interactive operation.
Accompanying drawing explanation
In order to be illustrated more clearly that the technical scheme of the embodiment of the present invention, below will to embodiment or
In description of the prior art, the required accompanying drawing used is briefly described, it should be apparent that below,
Accompanying drawing in description is only some embodiments of the present invention, for those of ordinary skill in the art
From the point of view of, on the premise of not paying creative work, it is also possible to obtain other according to these accompanying drawings
Accompanying drawing.
The structural representation of a kind of electronic whiteboard that Fig. 1 provides for the embodiment of the present invention；
The structural representation of the another kind of electronic whiteboard that Fig. 2 provides for the embodiment of the present invention；
Fig. 3 is a kind of circuit diagram driving module of the electronic whiteboard shown in Fig. 1；
Fig. 4 is the another kind of circuit diagram driving module of the electronic whiteboard shown in Fig. 1；
The structural representation of a kind of optical projection system that Fig. 5 provides for the embodiment of the present invention；
A kind of practical circuit figure launching equipment that Fig. 6 provides for the embodiment of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, to the technical side in the embodiment of the present invention
Case is clearly and completely described, it is clear that described embodiment is only the present invention one
Divide embodiment rather than whole embodiments.Based on the embodiment in the present invention, this area is general
The every other embodiment that logical technical staff is obtained under not making creative work premise,
Broadly fall into the scope of protection of the invention.
Embodiments provide a kind of electronic whiteboard, as it is shown in figure 1, include: the first panel
101 and multiple driving module 102.
The plurality of driving module 102 array arrangement is in the side of described first panel 101.
Preferably, described first panel 101 includes the panel of transparent material, such as acrylic board.
It should be noted that described first panel 101 can also is that the face of other non-transparent material
Plate, such as, curtain, as long as can show that the panel of projection information is the most permissible, the present invention is to this
It is not restricted.
It should be noted that preferably, the plurality of driving module 102 and described first panel
101 are placed in parallel, and the plurality of driving module 102 is fixed on the one of described first panel 101
Side.The concrete fixed form present invention does not limits, it is for instance possible to use stud is by described many
Individual driving module 102 is fixed with described first panel 101；Or, the plurality of driving module
102 are fixed with described first panel 101 by draw-in groove.
Further, described electronic whiteboard, as in figure 2 it is shown, also include: the second panel 103.
The plurality of driving module 102 is positioned at described first panel 101 and described second panel 103
Between.
Wherein, described second panel 103 includes the panel of transparent material, such as acrylic board.
Described driving module 102, as it is shown on figure 3, include inductance 1021, change-over circuit 1022
And light emitting diode 1023.
The two ends of described inductance 1021 are respectively with two inputs of described change-over circuit 1011 even
Connect；The positive pole of described light emitting diode 1023 and the cathode output end of described change-over circuit 1011
Connect；The negative pole of described light emitting diode 1023 exports with the negative pole of described change-over circuit 1011
End connects.
Preferably, the plurality of driving module 102 is placed in parallel with described second panel 103,
And the plurality of driving module 102 is fixed on the side of described second panel 103.Concrete consolidates
Determine the mode present invention not limit, it is for instance possible to use stud is by the plurality of driving module 102
Fix with described second panel 103；Or, the plurality of driving module 102 by draw-in groove with
Described second panel 103 is fixing.
Preferably, described change-over circuit 1022 includes: bridge rectifier.
It should be noted that described change-over circuit 1022 can also is that other circuit, such as: whole
Stream diode, or half-wave rectifying circuit, or full-wave rectifying circuit etc., this is not limited by the present invention
System.
It should be noted that the plurality of driving module 102 can be integrated at least one piece of circuit
On printed panel.Preferably, the plurality of driving module 102 is integrated in a printed circuit board.
The opposite side of described first panel 101, for showing the projection information that projector equipment projects.
Described inductance 1021 inductive electromagnetic signal also produces induced-current, described change-over circuit 1022
Described induced-current is carried out rectification, and the induced-current after rectification triggers described light emitting diode
1023 launch optical signal.
Described second panel 103, for the optical signal of light emitting diode described in transmission 1023.
Concrete, if the opposite side of described first panel 101 shows the throwing of projector equipment projection
Shadow information, now, when projection information is if desired edited by user, can be according to projection
The content that information carries out editing carrys out transmission of electromagnetic signals by opening transmitting equipment, owing to driving mould
Block 102 has inductance 1021, thus this inductance 1021 can receive the electricity that transmitting equipment is launched
Magnetic signal, and then produce induced-current at inductance 1021 two ends, due to the induced electricity now produced
Stream is alternating current, so needing two inputs of alternating current input to change-over circuit 1022
End carries out rectification, thus at two outputs output DC currents of change-over circuit 1022, due to
The positive and negative level of light emitting diode 1023 be connected to change-over circuit 1022 cathode output end and
Cathode output end, therefore, described light emitting diode 1023 can be turned on, i.e. by this DC current
Trigger described light emitting diode 1023 and launch optical signal.
It should be noted that the opposite side at described first panel 101 does not show projector equipment
During the projection information projected, user can also carry out transmission of electromagnetic signals by transmitting equipment, and then
Triggered described light emitting diode 1023 by the inductance 1021 driven in module 102 and launch optical signal,
The present invention is without limitation.
Further, described driving module 102, as shown in Figure 4, also include: resistance 1024
And electric capacity 1025.
The cathode output end of described change-over circuit 1022 is by described resistance 1024 and described luminescence
The positive pole of diode 1023 connects；The negative pole of described electric capacity 1025 and described light emitting diode 1023
Negative pole connect；The positive pole of described electric capacity 1025 connects with the positive pole of described light emitting diode 1023
Connect.
It should be noted that described resistance 1024 and described electric capacity 1025 are, protection is described to be sent out
The element of optical diode 1023, prevents described light emitting diode 1023 from burning out when electric current is excessive.
Embodiments provide a kind of electronic whiteboard, including: the first panel and multiple driving
Module, wherein, multiple driving module arrays are arranged in the side of the first panel, multiple driving moulds
Block includes inductance, change-over circuit and light emitting diode, inductance be used for inductive electromagnetic signal, and
Inductance two ends produce induced-current, and now, the induced-current of generation is alternating current, so needing
This induced-current input to change-over circuit will carry out rectification, and then by the direct current after rectification
Current trigger light emitting diode launches optical signal.Can be seen that electronic whiteboard that the present invention designs is only
By one piece of panel and by inductance, change-over circuit, the driving module that light emitting diode is constituted forms,
Its material and the low price of components and parts, simple in construction, thus reduce the cost of electronic whiteboard.
Embodiments provide a kind of optical projection system, as it is shown in figure 5, include: electronics is white
Plate 501, processing equipment 502, projector equipment 503, picture pick-up device 504.
Wherein, described processing equipment 502 is connected with described projector equipment 503.
It should be noted that described processing equipment 502 is connected permissible with described projector equipment 503
Connected by holding wire, it is also possible to for wireless connection, the present invention is without limitation.
Described electronic whiteboard 501 is the electronic whiteboard described in above-described embodiment.
Described electronic whiteboard 501, for triggering light emitting diode according to the electromagnetic signal sensed
1023 launch optical signal.
Concrete, described electronic whiteboard 501 is when receiving electromagnetic signal, i.e. inductance 1021 connects
When receiving electromagnetic signal, produce induced-current at inductance 1021 two ends, due to the sense now produced
Induced current is alternating current, so needing two of alternating current input to change-over circuit 1022
Input carries out rectification, thus at two output output DC currents of change-over circuit 1022,
Owing to the positive and negative level of light emitting diode 1023 is connected to the positive pole output of change-over circuit 1022
End and cathode output end, therefore, described light emitting diode 1023 can be turned on by this DC current,
I.e. trigger described light emitting diode 1023 and launch optical signal.
It should be noted that the electromagnetic signal that described electronic whiteboard 501 receives is in user's hand
The transmitting equipment held sends, and this launches equipment needs apart from described electronic whiteboard 501
When position is not less than predeterminable range, contents projection electricity projection information edited according to user
Magnetic signal.If transmitting equipment is more than predeterminable range apart from the position of described electronic whiteboard 501,
The electromagnetic signal then launching equipment transmitting can not be received by described electronic whiteboard 501.
It should be noted that the content that projection information is edited by the present invention does not limits, example
As, the either segment word in projection information can be added underscore, or in projection information
Word modify, or point-like information simple to the interpolation in projection information, round
Point etc..
It should be noted that the circuit launching equipment transmission of electromagnetic signals can use multiple circuit
Realize, exemplary, can be come real by the circuit of transmission of electromagnetic signals as shown in Figure 6
Existing.
Described picture pick-up device 504, for obtaining the image information of described electronic whiteboard 501.
Wherein, described picture pick-up device 504 is positioned at the opposite side of described first panel 101.
Preferably, described picture pick-up device 504 include CCD (Charge Coupled Device,
Charge coupled cell).
It should be noted that described picture pick-up device 504 can also have camera function for other
Equipment, such as video camera, the present invention is without limitation.
Described processing equipment 502, is used for producing projection information and adjusting institute according to described image information
State projection information.
Concrete, described processing equipment 502 is according to the image information of the electronic whiteboard obtained not
With, the most different to the processing method of image information, specific as follows:
When described image information is point-like information, described processing equipment 502, specifically for by institute
State image information to process, obtain the coordinate information of described optical signal, and according to described coordinate
Described projection information is adjusted by information.
It is to say, when described image information is point-like information, described processing equipment 502 will
The operations such as each two field picture of point-like information carries out distortion correction, the contrast enhancing of image, so
Afterwards pretreated image is carried out Threshold segmentation, owing to light emitting diode 1023 is lit, institute
With the gray value of the position at light emitting diode 1023 place that is lit apparently higher than in image other
The gray value of position, now, continues the image by Threshold segmentation processes and carries out binary conversion treatment,
The position at light emitting diode 1023 place being i.e. lit becomes white, and gray value is 255,
Other positions of image become black, and gray value is 0, and ask for the barycenter of white portion, will
Striked center-of-mass coordinate, as the coordinate of the light emitting diode 1023 being lit, finally will obtain
Image information in the center-of-mass coordinate of light emitting diode 1023 be converted into real screen and sit
Mark, and coordinates correction algorithm can be added, make the actual screen error of coordinate calculated less,
So that it is determined that the coordinate information of point-like information, and according to this coordinate information, projection information is grasped
Make, complete the editor to projection information, further the projection information after editor is sent to described
Projector equipment 503.
When described image information is the image with motion track, described processing equipment, specifically
For described image information being processed, obtain the motion track of described optical signal, and according to
Described projection information is adjusted by described motion track.
It is to say, when described image information is the image with motion track, described process
Each two field picture of this image information is carried out distortion correction by equipment 502, and the contrast of image increases
Strong grade operates, and then pretreated image carries out Threshold segmentation, due to light emitting diode 1023
Be lit, thus the gray value of the position at light emitting diode 1023 place being lit apparently higher than
The gray value of other positions in image, now, continues the image by Threshold segmentation processes and carries out two
Value processes, and the position at light emitting diode 1023 place being i.e. lit becomes white, gray scale
Value is 255, and other positions of image become black, and gray value is 0, and asks for white portion
Barycenter, using striked center-of-mass coordinate as the coordinate of the light emitting diode 1023 being lit,
The center-of-mass coordinate of the light emitting diode 1023 in the image information that finally will obtain is converted into truly
Screen coordinate, and coordinates correction algorithm can be added, make the actual screen coordinate calculated
Error is less, after the actual screen coordinate determining all light emitting diodes 1023 being lit,
I.e. can determine that the motion track of transmitting equipment, and according to the motion track determined, projection information is entered
Row operation, completes the editor to projection information, is sent extremely by the projection information after editor further
Described projector equipment 503.
It should be noted that described processing equipment 503 can also determine described according to additive method
The coordinate information of optical signal and motion track, the present invention is without limitation.
Described projector equipment 503, the projection information projection after adjusting is to described electronic whiteboard
501。
Wherein, described projector equipment 503 is positioned at the opposite side of described first panel 101.
It should be noted that described processing equipment 502 and described projector equipment 503 can be or
Person may not be physically separate, say, that described processing equipment 502 can be with institute
State projector equipment 503 to be integrated on Same Physical equipment, it is also possible to be respectively two different things
Reason equipment.The present invention is without limitation.
Embodiments providing a kind of optical projection system, described system includes: electronic whiteboard,
Processing equipment, projector equipment, and picture pick-up device；Wherein, electronic whiteboard includes: the first panel
And multiple driving module, and multiple driving module array is arranged in the side of the first panel, multiple
Driving module to include inductance, change-over circuit and light emitting diode, inductance is used for inductive electromagnetic signal,
And induced-current is produced at inductance two ends, now, the induced-current of generation is alternating current, institute
This induced-current input to change-over circuit will carry out rectification with needs, and then by after rectification
DC current triggers light emitting diode and launches optical signal；Picture pick-up device, is used for obtaining electronic whiteboard
Image information, and by this image information send to processing equipment, by processing equipment according to this figure
As information adjust projection information, and will adjust after projection information send to projector equipment, finally
Projection information after being adjusted by projector equipment projects to electronic whiteboard, thus realizes man-machine interaction
Operation.Can be seen that electronic whiteboard that optical projection system in the present invention uses only by one piece of panel and
By inductance, change-over circuit, the driving module composition that light emitting diode is constituted, its material and unit's device
The low price of part, simple in construction, thus reduce the cost of electronic whiteboard, reduce further
The cost of optical projection system.
In several embodiments provided herein, it should be understood that disclosed system, dress
Put and method, can realize by another way.Such as, device described above is implemented
Example is only schematically, such as, the division of described unit, it is only a kind of logic function and draws
Point, actual can have other dividing mode, the most multiple unit or assembly to tie when realizing
Close or be desirably integrated into another system, or some features can be ignored, or not performing.Separately
A bit, shown or discussed coupling each other or direct-coupling or communication connection can be
By INDIRECT COUPLING or the communication connection of some interfaces, device or unit, can be electrical, machine
Tool or other form.
The described unit illustrated as separating component can be or may not be physically separate
, the parts shown as unit can be or may not be physical location, i.e. can position
In a place, or can also be distributed on multiple NE.Can be according to actual need
Select some or all of unit therein to realize the purpose of the present embodiment scheme.
It addition, each functional unit in each embodiment of the present invention can be integrated in a process
In unit, it is also possible to be that the independent physics of unit includes, it is also possible to two or more are single
Unit is integrated in a unit.Above-mentioned integrated unit both can realize to use the form of hardware,
The form that hardware can also be used to add SFU software functional unit realizes.
The above-mentioned integrated unit realized with the form of SFU software functional unit, can be stored in one
In computer read/write memory medium.Above-mentioned SFU software functional unit is stored in a storage medium,
Including some instructions with so that computer equipment (can be personal computer, server,
Or the network equipment etc.) perform the part steps of method described in each embodiment of the present invention.And it is front
The storage medium stated includes: USB flash disk, portable hard drive, read-only storage (Read-Only Memory,
Be called for short ROM), random access memory (Random Access Memory, be called for short RAM),
The various medium that can store program code such as magnetic disc or CD.
Last it is noted that above example is only in order to illustrate technical scheme, and
Non-to its restriction；Although the present invention being described in detail with reference to previous embodiment, ability
The those of ordinary skill in territory is it is understood that it still can be to the skill described in foregoing embodiments
Art scheme is modified, or wherein portion of techniques feature is carried out equivalent；And these are repaiied
Change or replace, not making the essence of appropriate technical solution depart from various embodiments of the present invention technical side
The spirit and scope of case.
Claims (10)
1. an electronic whiteboard, it is characterised in that including: the first panel and multiple driving module；
The plurality of driving module array is arranged in the side of described first panel；
Described driving module includes inductance, change-over circuit and light emitting diode, and described inductance senses
Electromagnetic signal also produces induced-current, and described change-over circuit carries out rectification to described induced-current,
Induced-current after rectification triggers described light emitting diode and launches optical signal.
Electronic whiteboard the most according to claim 1, it is characterised in that
The two ends of described inductance are connected with two inputs of described change-over circuit respectively；Described
The positive pole of optical diode is connected with the cathode output end of described change-over circuit；Described light emitting diode
Negative pole be connected with the cathode output end of described change-over circuit.
Electronic whiteboard the most according to claim 2, it is characterised in that described driving module
Also include: resistance and electric capacity；
The cathode output end of described change-over circuit is by described resistance with described light emitting diode just
Pole connects；The negative pole of described electric capacity is connected with the negative pole of described light emitting diode；Described electric capacity
Positive pole is connected with the positive pole of described light emitting diode.
4. according to the electronic whiteboard described in Claims 2 or 3, it is characterised in that described conversion
Circuit includes: bridge rectifier.
5. according to the electronic whiteboard described in Claims 2 or 3, it is characterised in that also include:
Second panel；
The plurality of driving module is between described first panel and described second panel.
Electronic whiteboard the most according to claim 5, it is characterised in that
Described second panel includes the panel of transparent material.
7. an optical projection system, it is characterised in that described system includes: electronic whiteboard, shooting
Equipment, processing equipment and projector equipment；
Described electronic whiteboard is the electronic whiteboard described in any one of claim 1-6, according to sensing
The electromagnetic signal arrived triggers light emitting diode and launches optical signal；
Described picture pick-up device, for obtaining the image information of described electronic whiteboard；
Described processing equipment, is used for producing projection information and adjusting according to described image information described
Projection information；
Described projector equipment, the projection information projection after adjusting is to described electronic whiteboard.
System the most according to claim 7, it is characterised in that
Described processing equipment, specifically for described image information being processed, obtains described light
The coordinate information of signal, and according to described coordinate information, described projection information is adjusted.
System the most according to claim 7, it is characterised in that
Described processing equipment, specifically for described image information being processed, obtains described light
The motion track of signal, and according to described motion track, described projection information is adjusted.
10. according to the system described in any one of claim 7-9, it is characterised in that described in take the photograph
As equipment includes charge coupled cell CCD.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410229335.0A CN103997632B (en) | 2014-05-27 | 2014-05-27 | A kind of electronic whiteboard and optical projection system |
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| CN201410229335.0A CN103997632B (en) | 2014-05-27 | 2014-05-27 | A kind of electronic whiteboard and optical projection system |
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| CN103997632A CN103997632A (en) | 2014-08-20 |
| CN103997632B true CN103997632B (en) | 2016-09-07 |
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| CN201410229335.0A Active CN103997632B (en) | 2014-05-27 | 2014-05-27 | A kind of electronic whiteboard and optical projection system |
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| CN106251805A (en) * | 2016-02-04 | 2016-12-21 | 北京智谷睿拓技术服务有限公司 | Display control method and equipment |
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| CN101281441A (en) * | 2008-05-19 | 2008-10-08 | 广州成沣信息科技有限公司 | System and method for constituting big screen multi-point touch screen |
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| CN101042625A (en) * | 2006-03-22 | 2007-09-26 | 深圳市巨龙科教高技术股份有限公司 | Electromagnetic induction interactive electronic white board and system thereof |
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