CN203759658U - Electromagnetic induction display device with a plurality of pens for simultaneous writing - Google Patents
Electromagnetic induction display device with a plurality of pens for simultaneous writing Download PDFInfo
- Publication number
- CN203759658U CN203759658U CN201420151401.2U CN201420151401U CN203759658U CN 203759658 U CN203759658 U CN 203759658U CN 201420151401 U CN201420151401 U CN 201420151401U CN 203759658 U CN203759658 U CN 203759658U
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- processor
- receiving coil
- electromagnetic
- display device
- pens
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- 230000005674 electromagnetic induction Effects 0.000 title claims abstract description 13
- 238000004088 simulation Methods 0.000 claims description 11
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 238000004364 calculation method Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000004807 localization Effects 0.000 description 1
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Abstract
The utility model discloses an electromagnetic induction display device with a plurality of pens for simultaneous writing. The electromagnetic induction display device comprises a plurality of electromagnetic pens having different electromagnetic wave frequencies, an electronic white board for receiving the signals of the electromagnetic pens, a computer and a projector; the electronic white board comprises an electronic white board screen, a receiving coil and a PCB (Printed Circuit Board); a plurality of analogue switches corresponding to electromagnetic pens having different electromagnetic wave frequencies, an analogue frequency-selecting amplifying circuit, an A/D (Analogue/Digital) converting circuit and a processor are arranged on the PCB. The receiving coil receives the electromagnetic wave frequency signals emitted by the different electromagnetic pens, respectively, the electromagnetic signals go through the analogue switches, the analogue frequency-selecting amplifying circuit and the A/D converting circuit, and then the electromagnetic analogue signals are converted into digital signals and send to the processor for processing. The processor is used for processing the writing traces of the different electromagnetic pens by use of a computing method in the prior art and then transmitting the writing trace signals to the projector via the computer, and therefore, the purpose of multiple-pen writing is achieved.
Description
Technical field
The utility model relates to information education field, more particularly, relates to a kind of many electromagnetic induction display device of simultaneously writing.
Background technology
In the use procedure of electronic whiteboard, due to its ways of writing that has changed original chalk, chalkboard eraser and blackboard, be therefore more and more subject to liking of users, electronic whiteboard has the feature such as write conveniently, pollution-free.But, in use, often need many people to write simultaneously, but in prior art, do not have corresponding solution.
Utility model content
For the defect existing in prior art, the purpose of this utility model is to provide a kind of many electromagnetic induction display device of simultaneously writing.
For achieving the above object, the utility model adopts following technical scheme:
A kind of many electromagnetic induction display device of simultaneously writing, comprise that several have the time writer of different wave frequencies, for receiving the electronic whiteboard of time writer signal, computer and projector, described electronic whiteboard comprises electronic whiteboard screen, receiving coil and pcb board, described pcb board be provided with several from described in there is the corresponding analog switch of the time writer of different wave frequencies, simulation selective frequency amplifier circuit, A/D change-over circuit and processor, described analog switch is connected with the input end of described simulation selective frequency amplifier circuit respectively, the input end of described A/D change-over circuit is connected with the output terminal of described simulation selective frequency amplifier circuit, the output terminal of described A/D change-over circuit is connected with processor, described processor is also connected with analog switch respectively,
Described receiving coil is arranged a netted receiving coil group of formation in level and vertical both direction respectively, described receiving coil is mounted on the rear side of electronic whiteboard screen, and the viewing area of the receiving area that described receiving coil group forms and described electronic whiteboard screen matches; Described receiving coil is also connected with several described analog switches respectively;
Described processor is also connected with projector by computer.
Described processor is connected with described computer by USB interface.
Described computer expert crosses VGA interface or HDMI interface is connected with described projector.
The quantity of described time writer is 2.
Compared with prior art, adopt a kind of many electromagnetic induction display device of simultaneously writing of the present utility model, receiving coil receives respectively after the wave frequency signal that different time writers send, electromagnetic signal is through analog switch, simulation selective frequency amplifier circuit and A/D change-over circuit, electromagnetical analogies signal is converted to digital signal, then sends to processor processing.Processor adopting computing method of the prior art are processed after the handwriting trace of different time writers, send handwriting trace signal to projector through computer, realize many objects of writing.
Brief description of the drawings
Fig. 1 is the principle schematic of embodiment of the present utility model;
Fig. 2 is the principle schematic of receiving coil group of the present utility model.
Embodiment
Further illustrate the technical solution of the utility model below in conjunction with drawings and Examples.
Embodiment
Refer to a kind of many electromagnetic induction display device of simultaneously writing shown in Fig. 1, comprise and there is respectively A, two time writers of B wave frequency, for receiving the electronic whiteboard of time writer signal, computer and projector, electronic whiteboard comprises electronic whiteboard screen, receiving coil and pcb board, pcb board is provided with the A corresponding with A wave frequency analog switch frequently, the B corresponding with B wave frequency be analog switch frequently, simulation selective frequency amplifier circuit, A/D change-over circuit and processor, A frequently, B frequently analog switch is connected with the input end of simulation selective frequency amplifier circuit respectively, the input end of A/D change-over circuit is connected with the output terminal of simulation selective frequency amplifier circuit, the output terminal of A/D change-over circuit is connected with processor, processor is also connected with A, B analog switch respectively,
Receiving coil is arranged a netted receiving coil group of formation in level and vertical both direction respectively, and receiving coil is mounted on the rear side of electronic whiteboard screen, and the viewing area of the receiving area that receiving coil group forms and described electronic whiteboard screen matches; Receiving coil is also connected with A frequency, B frequency analog switch respectively;
Processor is also connected with projector by computer.
Preferably, processor is connected with computer by USB interface, and computer expert crosses VGA interface or HDMI interface is connected with projector.
When use, the time writer intermittent transmission electromagnetic wave of emitting electromagnetic wave, after time writer is near electronic whiteboard screen, can sense the wave frequency signal of different time writer transmittings on the corresponding receiving coil after electronic whiteboard screen.Higher from the nearest coil-induced electromotive force arriving of time writer, now, A frequency, B frequently analog switch receive respectively after the handwriting trace of corresponding frequencies time writer, by simulation selective frequency amplifier circuit and A/D change-over circuit, electromagnetical analogies signal is converted to after digital signal, give processor processing, processor is according to key elements such as signal frequency, signal powers again, and after adopting localization method of the prior art to process, can obtain X, the Y coordinate position at different time writers place.After the handwriting trace signal of different time writers is synthetic by computer, composite signal is sent to projector, be projected in electronic whiteboard screen display by projector.
Those of ordinary skill in the art will be appreciated that, above embodiment is only for the purpose of this utility model is described, and not with opposing restriction of the present utility model, the quantity of for example time writer differs and is decided to be 2, can also have as required increase and decrease.As long as in essential scope of the present utility model, variation, distortion to the above embodiment all will drop in the scope of claim of the present utility model.
Claims (4)
1. more than an electromagnetic induction display device of simultaneously writing, is characterized in that,
Comprise that several have the time writer of different wave frequencies, for receiving the electronic whiteboard of time writer signal, computer and projector, described electronic whiteboard comprises electronic whiteboard screen, receiving coil and pcb board, described pcb board be provided with several from described in there is the corresponding analog switch of the time writer of different wave frequencies, simulation selective frequency amplifier circuit, A/D change-over circuit and processor, described analog switch is connected with the input end of described simulation selective frequency amplifier circuit respectively, the input end of described A/D change-over circuit is connected with the output terminal of described simulation selective frequency amplifier circuit, the output terminal of described A/D change-over circuit is connected with processor, described processor is also connected with analog switch respectively,
Described receiving coil is arranged a netted receiving coil group of formation in level and vertical both direction respectively, described receiving coil is mounted on the rear side of electronic whiteboard screen, and the viewing area of the receiving area that described receiving coil group forms and described electronic whiteboard screen matches; Described receiving coil is also connected with described several analog switches respectively;
Described processor is also connected with projector by computer.
2. electromagnetic induction display device according to claim 1, is characterized in that:
Described processor is connected with described computer by USB interface.
3. electromagnetic induction display device according to claim 1, is characterized in that:
Described computer expert crosses VGA interface or HDMI interface is connected with described projector.
4. electromagnetic induction display device according to claim 1, is characterized in that:
The quantity of described time writer is 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420151401.2U CN203759658U (en) | 2014-03-31 | 2014-03-31 | Electromagnetic induction display device with a plurality of pens for simultaneous writing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420151401.2U CN203759658U (en) | 2014-03-31 | 2014-03-31 | Electromagnetic induction display device with a plurality of pens for simultaneous writing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203759658U true CN203759658U (en) | 2014-08-06 |
Family
ID=51254910
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420151401.2U Expired - Lifetime CN203759658U (en) | 2014-03-31 | 2014-03-31 | Electromagnetic induction display device with a plurality of pens for simultaneous writing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203759658U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109032440A (en) * | 2018-09-06 | 2018-12-18 | 广东宗华触控科技有限公司 | A kind of hand-written calutron |
| WO2020034893A1 (en) * | 2018-08-15 | 2020-02-20 | 广州视源电子科技股份有限公司 | Intelligent interaction system, writing track display method and device, tablet and medium |
| WO2022022387A1 (en) * | 2020-07-27 | 2022-02-03 | 华为技术有限公司 | Method, apparatus, and system for controlling information input devices on terminal |
-
2014
- 2014-03-31 CN CN201420151401.2U patent/CN203759658U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020034893A1 (en) * | 2018-08-15 | 2020-02-20 | 广州视源电子科技股份有限公司 | Intelligent interaction system, writing track display method and device, tablet and medium |
| CN109032440A (en) * | 2018-09-06 | 2018-12-18 | 广东宗华触控科技有限公司 | A kind of hand-written calutron |
| WO2022022387A1 (en) * | 2020-07-27 | 2022-02-03 | 华为技术有限公司 | Method, apparatus, and system for controlling information input devices on terminal |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: SHANGHAI HUASHI JINGCHENG NETWORK TECHNOLOGY CO., Free format text: FORMER OWNER: SHANGHAI HUASHI JINGCHENG HIGH NEW (GROUP) CO., LTD. Effective date: 20150215 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 200333 PUTUO, SHANGHAI TO: 200042 PUTUO, SHANGHAI |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20150215 Address after: 200042 room 20, building 958, 315 North Main Road, Shanghai, Putuo District Patentee after: SHANGHAI HSJC NETWORK TECHNOLOGY Co.,Ltd. Address before: 200333, room 27, building 879, Lane 213, Zhongjiang Road, Shanghai, Putuo District Patentee before: SHANGHAI HSJC HIGH-TECH (GROUP) CO.,LTD. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20140806 |
|
| CX01 | Expiry of patent term |