CN202167146U - Rear projection electronic blackboard system based on one-chip microcomputer - Google Patents
Rear projection electronic blackboard system based on one-chip microcomputer Download PDFInfo
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- CN202167146U CN202167146U CN2011202267019U CN201120226701U CN202167146U CN 202167146 U CN202167146 U CN 202167146U CN 2011202267019 U CN2011202267019 U CN 2011202267019U CN 201120226701 U CN201120226701 U CN 201120226701U CN 202167146 U CN202167146 U CN 202167146U
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- electronic blackboard
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Abstract
The utility model discloses a rear projection electronic blackboard system based on a one-chip microcomputer. The rear projection electronic blackboard system includes a multi-point touch motion capture device, a DLP rear projection device, and the one-chip microcomputer. The multi-point touch motion capture device is used to capture a screen surface image, and an output terminal of the multi-point touch motion capture device is connected with an input terminal of the one-chip microcomputer. The DLP rear projection device is used to display content received by the one-chip microcomputer, and the input terminal of the DLP rear projection device is connected with the output terminal of the one-chip microcomputer. The one-chip microcomputer is connected with the multi-point touch motion capture device and the DLP rear projection device, and is used to process a signal received by the multi-point touch motion capture device, and transmits the processed signal to the DLP rear projection device for output. The rear projection electronic blackboard system based on the one-chip microcomputer has the advantages of projection display and blackboard writing, and more accords with the environmental protection and health requirements. The functions of free writing, unlimited page-turning and inserting function, and abundant multi-disciplinary resource database function, and the like are highly prized by the teachers and the students.
Description
Technical field
The utility model relates to a kind of blackboard, and specifically, what relate to is a kind of SCM Based rear projection electronic blackboard system.
Background technology
For a long time; Our teaching appliance is continued to use blackboard, the green plate of metal and chalk mode always; Waiting in black and white of student's books commonly used, because people's vision is to come Font recognition and color thereof through sensitization, sense look, and the contrast of black and white is too strong; Very easily cause the fatigue of vision, thereby cause the generation of student's large tracts of land myopia incidence of disease.Simultaneously, the dust that chalk produces has not only produced harm to teacher, classmate's health, more all there is negative effect in environment, on every side life-span of educational technology equipment.
In recent years, in many schools, also use projection to show through regular meeting, projection is showed often all need connect a projector, hangs up screen, then projector is connected with computer.Projection is showed can let the student better understand the content of displaying, but projector's price comparison is high, and general projector picture sometimes also is not very clear, results of learning and good not as expection.
The two has relative merits separately above-mentioned projection displaying and blackboard writing on the blackboard; And both have complementary relationship on a certain degree: go to see from the student's that listens to the teacher angle; Teacher writes on blackboard and has more process property, so thinking can be complied with naturally more; Projection on the other side is showed the effect of similar by contrast " attracting eyeball " not as good as the blackboard writing on the blackboard, but the speed of its presentation information, capacity also have some other aspect holder's advantage.But do not merge well in both practical applications.From the contrast of these the two kinds mode relative merits of giving lessons, if a kind of scheme of design makes projection displaying and blackboard writing on the blackboard closely merge, learn from other's strong points to offset one's weaknesses neatly, the efficient in classroom will increase so.
The utility model content
The purpose of the utility model is to solve above-mentioned deficiency of the prior art; A kind of SCM Based rear projection electronic blackboard system is provided; Projection displaying and blackboard writing on the blackboard relative merits separately summed up, solved the problem how relative merits separately better merge, learn from other's strong points to offset one's weaknesses, traditional teaching equipment is improved and simplifies; Daily servicing and use are offered convenience, and more meet the environment protection health requirement.
For realizing above-mentioned purpose, the described SCM Based rear projection electronic blackboard system of the utility model comprises:
One multiple point touching motion capture device is used for the screen surface picture catching; The output terminal of this device is connected to the input end of single-chip microcomputer;
One DLP back projection device is used to show the content that receives from said single-chip microcomputer; The input end of this device is connected to the output terminal of single-chip microcomputer; And
Single-chip microcomputer, said single-chip microcomputer connect said multiple point touching motion capture device and said DLP back projection device, will handle from the signal that said multiple point touching motion capture device receives, and the signal after will handling are sent to said DLP back projection device and export.
Said DLP back projection device comprises infrared transmission module, screen and optical projection system, and said screen and said optical projection system are integral structure, adopts Digital Light Processor (DLP) in the said optical projection system.Said infrared transmission module provides transmitting illuminant, is positioned at the inboard of said screen.
Said screen can be optical projection screen or the LCD LCD screen based on projection theory.
Said infrared transmission module is the infrared laser ballistic device.
Said multiple point touching motion capture device comprises infrared sensor, and said infrared sensor is arranged in the inboard of said DLP back projection device screen, is used to obtain the screen surface image and carries out motion capture, and the signal of catching is outputed to single-chip microcomputer.
Said single-chip microcomputer is the ARM single-chip microcomputer.
Be provided with subscriber interface module in the said single-chip microcomputer.
Said subscriber interface module is pivoted design.
In the utility model; When finger or virtual chalk touching screen, finger or virtual chalk produce diffuse reflection to the infrared light that infrared transmission module sends, and then infrared sensor changes to the brightness of image of finger or virtual chalk position; LLP motion capture device is caught these actions through infrared sensor; It is carried out opto-electronic conversion, and corresponding information is sent into SCM system, after SCM system is handled; To output signal to the DLP back projection device, on screen, show by the DLP back projection device.Certainly, the utility model also can directly be connected the content that is used for showing computer with computer.
The utility model adopts LLP motion capture device, DLP back projection device and ARM single-chip microcomputer; Projection displaying and blackboard writing on the blackboard relative merits are separately summed up, and daily servicing and use offer convenience, and more meet the environment protection health requirement; Make teachers and students be completely free of the puzzlement of dust; Clean dustlessly, easily wipe, leave no trace.Its random writing function, unrestrictedly function is inserted in page turning, abundant functions such as multidisciplinary resources bank enjoy teachers and students to favor; Realize better between multimedia teaching and the teachers and students interactive with exchange; Thereby make classroom atmosphere more active, also make teacher's teaching light more, efficient.
Description of drawings
Fig. 1 is the utility model structure principle chart.
Embodiment
Below in conjunction with accompanying drawing and embodiment the technical scheme of the utility model is done further to explain, but following content is not used in the protection domain that limits the utility model.
As shown in Figure 1, present embodiment provides a kind of SCM Based rear projection electronic blackboard system, comprising:
One LLP motion capture device 1 is used for the screen surface picture catching; The output terminal of this device is connected to the input end of single-chip microcomputer 2; The LLP technology is a kind of in the multiple point touching technology;
One DLP back projection device 3 is used to show the content that receives from said single-chip microcomputer; The input end of this device is connected to the output terminal of single-chip microcomputer 2; And
Single-chip microcomputer 2, said single-chip microcomputer connect said LLP motion capture device 1 and said DLP back projection device 3, will handle from the signal that said LLP motion capture device 1 receives, and the signal after will handling are sent to said DLP back projection device 3 and export.
Said LLP motion capture device 1 comprises infrared sensor, and said infrared sensor is arranged in the inboard of said DLP back projection device screen, is used to obtain the screen surface image and carries out motion capture.
Said DLP back projection device 3 comprises infrared transmission module, screen and optical projection system; Said screen and said optical projection system are integral structure; Adopt Digital Light Processor (DLP) in the said optical projection system; Said infrared transmission module provides transmitting illuminant, also is arranged in the inboard of said DLP back projection device screen.
Said screen can be optical projection screen or the LCD LCD screen based on projection theory.
Adopt Digital Light Processor (DLP) in the said optical projection system; DLP is the abbreviation of English Digital Light Porsessor; It with DMD (Digital Micormirror Device) with digital micro-mirror device as image device, the reflected light projects images is to screen.Its Primary Component DMD is a kind of semiconductor element of being developed by Texas Instruments, and a DMD chip comprises thousands of small square reflecting optics.These micro mirrors are closely arranged according to ranks, and each micro mirror is represented a pixel, and can be controlled at the two states switching rotation down that opens or closes by corresponding memory, thus the control reflection of light.The key problem in technology point of DLP optical projection system is as follows: at first be digital advantage.The employing of digital technology makes the gradation of image grade reach the 256-1024 level, and color can reach 2563-10243 kinds, and picture noise disappears, and image quality is stable, and the exact figure image can constantly reproduce, and sustains its quality through age.Next is the reflection advantage.The application of reflective DMD device reaches more than 60% total optical efficiency of image device, and the homogeneity of contrast and brightness is all very outstanding.On the DMD piece, the area of each pixel is 16 μ m * 16 μ m, is spaced apart 1 μ m.
Said infrared transmission module is the infrared laser ballistic device.
Said single-chip microcomputer 1 is the ARM single-chip microcomputer.In the present embodiment, adopt ARM CortexA9 processor.
Be provided with subscriber interface module in the said single-chip microcomputer 1.
Said subscriber interface module is pivoted design, remedies the deficiency after some areas dwindle, and makes that also the interface is more flexible, and simultaneously through single-chip microcomputer, subscriber interface module realization PPT displaying is integrated with Free Writing mutually.
Said ARM single-chip microcomputer itself is 32 designs, but also is equipped with 16 bit instruction collection.Storer reaches 35% than 32 code savings of equal value in general, yet the institute that has kept 32 systems has superiority.The Jazelle technology of ARM makes Java quicken to obtain than quickening nuclear phase than power consumption reduction by 80% based on the Java Virtual Machine (JVM) of software much higher performance and equal non-Java.Increase by 16 and 32 arithmetic operation capabilities that the DSP instruction set provides enhancing on the cpu function, improved performance and dirigibility.The debugging that ARM also provides two forward position characteristics to come the high integrated SoC device of the dark embedded processor of subband, they are embedded ICE-RT logic and the grand nuclear of embedded tracking (ETMS) series.
In the present embodiment; When finger or virtual chalk touching screen, finger or virtual chalk produce diffuse reflection to the infrared light that infrared transmission module sends, and then infrared sensor changes to the brightness of image of finger or virtual chalk position; LLP motion capture device is caught these actions through infrared sensor; It is carried out opto-electronic conversion, and corresponding information is sent into SCM system, after SCM system is handled; To output signal to the DLP back projection device, on screen, show by the DLP back projection device.Certainly, the utility model also can directly be connected the content that is used for showing computer with computer, and simultaneously through single-chip microcomputer, subscriber interface module realization PPT displaying is integrated with Free Writing mutually.So just can realize having simultaneously the advantage of projection displaying and blackboard writing on the blackboard.
Claims (8)
1. SCM Based rear projection electronic blackboard system is characterized in that comprising:
One multiple point touching motion capture device is used for the screen surface picture catching; The output terminal of this device is connected to the input end of single-chip microcomputer;
One DLP back projection device is used to show the content that receives from said single-chip microcomputer; The input end of this device is connected to the output terminal of single-chip microcomputer; And
Single-chip microcomputer, said single-chip microcomputer connect said multiple point touching motion capture device and said DLP back projection device, will handle from the signal that said multiple point touching motion capture device receives, and the signal after will handling are sent to said DLP back projection device and export.
2. SCM Based rear projection electronic blackboard system according to claim 1; It is characterized in that: said DLP back projection device comprises infrared transmission module, screen and optical projection system; Said screen and said optical projection system are integral structure, adopt Digital Light Processor in the said optical projection system; Said infrared transmission module provides transmitting illuminant, is positioned at the inboard of said screen.
3. SCM Based rear projection electronic blackboard system according to claim 2 is characterized in that: said screen is optical projection screen or LCD LCD screen based on projection theory.
4. SCM Based rear projection electronic blackboard system according to claim 2 is characterized in that: said infrared transmission module is the infrared laser ballistic device.
5. SCM Based rear projection electronic blackboard system according to claim 1; It is characterized in that: said multiple point touching motion capture device; Comprise infrared sensor; Said infrared sensor is arranged in the inboard of said DLP back projection device screen, is used to obtain the screen surface image and carries out motion capture, and the signal of catching is outputed to single-chip microcomputer.
6. SCM Based rear projection electronic blackboard system according to claim 1 is characterized in that: said single-chip microcomputer is the ARM single-chip microcomputer.
7. according to claim 1 or 5 or 6 described SCM Based rear projection electronic blackboard systems, it is characterized in that: be provided with subscriber interface module in the said single-chip microcomputer.
8. SCM Based rear projection electronic blackboard system according to claim 7 is characterized in that: said subscriber interface module is pivoted design.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202267019U CN202167146U (en) | 2011-06-30 | 2011-06-30 | Rear projection electronic blackboard system based on one-chip microcomputer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202267019U CN202167146U (en) | 2011-06-30 | 2011-06-30 | Rear projection electronic blackboard system based on one-chip microcomputer |
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| CN202167146U true CN202167146U (en) | 2012-03-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011202267019U Expired - Fee Related CN202167146U (en) | 2011-06-30 | 2011-06-30 | Rear projection electronic blackboard system based on one-chip microcomputer |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103956078A (en) * | 2014-05-17 | 2014-07-30 | 俞金慧 | Induction-type blackboard device |
| CN109709758A (en) * | 2019-03-01 | 2019-05-03 | 苏州深光光电科技有限公司 | Vehicle window optical projection system and its method based on luminescence generated by light |
-
2011
- 2011-06-30 CN CN2011202267019U patent/CN202167146U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103956078A (en) * | 2014-05-17 | 2014-07-30 | 俞金慧 | Induction-type blackboard device |
| CN109709758A (en) * | 2019-03-01 | 2019-05-03 | 苏州深光光电科技有限公司 | Vehicle window optical projection system and its method based on luminescence generated by light |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120314 Termination date: 20120630 |