CN101631218A - Multimedia interactive projection machine - Google Patents
Multimedia interactive projection machine Download PDFInfo
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- CN101631218A CN101631218A CN200910111003A CN200910111003A CN101631218A CN 101631218 A CN101631218 A CN 101631218A CN 200910111003 A CN200910111003 A CN 200910111003A CN 200910111003 A CN200910111003 A CN 200910111003A CN 101631218 A CN101631218 A CN 101631218A
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Abstract
The invention discloses a multimedia projection machine with interactive electronic white board function. The invention is characterized in that the multimedia projection machine is internally provided with an independently-designed embedded computer system to select computer hardware, is provided with a DLP projection circuit connected with a display card circuit and is particularly provided with a receiving system for splitting a red light matrix and collecting a red light feedback signal and an interactive white board functional circuit for amplifying and comparing the signal and carrying out DSP calculation and driving. Compared with the prior art, the invention has the advantages of relatively simple assembly, low cost and extremely low stand-by power consumption, achieves the high-definition high-brightness projection and display effects and realizes the friendly human-computer interactive function. When the multimedia projection machine is in use, a person with a red light pen can mark and randomly write on a projection picture and control and operate a computer on the projection picture; and a teacher standing beside the projection picture can marvelously achieve the interactive communication effect. The multimedia projection machine can be used in the educational field instead of a special electronic white board.
Description
Technical field
The present invention relates to the audio-visual education programme system, especially relate to a kind of interactive projector with electronic whiteboard function.
Background technology
In general, use projector to give a lesson or have a meeting, projector all must be connected with notebook computer.Last class hour, the teacher can only play page by page according to set lantern slide.The teacher can't come deployment analysis with regard to the emphasis of lecture contents the inside, and writing on the blackboard is carefully explained targetedly especially.At this time often just need be equipped with an expensive heavier again electronic whiteboard machine again.
Existing multimedia overhead projector tutoring system adopts the working method of LCD mostly.Be to improve projector's brightness, use that high-power bulb, reflective mirror, condenser, heat-protecting glass, this traditional structure of fan exist big energy-consuming, light efficiency is low, picture brightness is uneven, complex structure, the life-span is short, cost is high and system connects the high defective such as not energy-conservation of unstable, power consumption.So far the projector of domestic-developed yet there are no practical product and is used for multimedia teaching.And adopt digital light to handle (Digital LightProcessing, be called for short DLP) although the multimedia overhead projector tutoring system of technology is existing multiple, but it is single simple with serviceability to form structure, still be necessary to improve, Shang Weijian has the projector of interactive white boarding, is applied to the multimedia overhead projector tutoring system.
Summary of the invention
Technical problem to be solved by this invention is the defective that remedies existing multimedia teaching facility simple function, provide a kind of DLP of employing projection pattern and electro-optical feedback mode multimedia interactive teaching projector, can be applied to the system of multimedia overhead projector teaching, solved the problem of one-machine-multi-function, populous, the country of education funds deficiency has special significance especially.
Technical problem of the present invention is solved by the following technical programs:
The inner computer that embeds of this projector, comprise that central processing unit, the information that is used for that is connected with described central processing unit exchanges visits and the hard disk of storage, the CD/VCD/DVD CD-ROM drive circuit, sound card circuit, video card circuit and the interface thereof that are connected with described central processing unit respectively, the network interface card circuit that is used to be connected to the INTENT network, can directly in network, roam; Have mouse, make native system possess succinctly human-computer dialogue function easily.The function of projector's band interactive electronic blank can win liking of a lot of teachers, also is to meet very much class hour on numerous teachers using and operating, and with the custom that the student teaches face-to-face, can enliven classroom atmosphere, strengthens the classroom effect.
The characteristics of this multimedia interactive projection machine are:
Be provided with the DLP project circuit that is connected with the video card circuit of embedded computer system, be provided with the audio process and audio power amplifying circuit and the loud speaker that link to each other with sound card, be used to amplify audio signal.
Be provided with and comprise that bulb and bulb light control system, and comprise that camera lens is used for the optical lens imaging system of imaging.Also be provided with the operation status control system of DLP microcontroller MCU, described microcontroller MCU is connected with described DLP drive circuit, color wheel motor drive circuit, bulb circuit respectively, and they are carried out program control respectively.
Summary of the invention
Technical problem to be solved by this invention is to remedy the more single defective of existing multimedia teaching facility function ratio, a kind of embedded computer module and infrared electro processing module of increasing on the projector of DLP optical treatment technology is provided, forms optical, mechanical and electronic integration, can be applied to the multimedia interactive projection machine of multimedia electrical teaching chamber.
Technical problem of the present invention is solved by following further technical scheme:
This multimedia interactive projection machine is to have embedded microminiaturized computer system in the projector the inside, and has embedded by infrared reflection of light receiving element, and DSP handles the photoelectric type blank control system that arithmetic element is formed.Accomplish optical, mechanical and electronic integration, realize the effect of one-machine-multi-function.
Be provided with and utilize the infrared special-purpose optical filtering can only the transmission near infrared light, characteristic by visible spectrum, the photoelectric pen or the Optoelectric teacher's pointer that are used to locate and write are infrared transmitter, when pressing screen with photoelectric pen, the photoelectric pen nib is under pressure or puts shake-up button on the press polish audio-visual education programme whip and connect circuit and can send infrared ray, infrared ray runs into plane reflection and is received signal to the optical filtering of receiver by CMOS sensitive chip (image sensor of high speed, high resolution), can calculate the infrared signal source by converting be the X and Y coordinates position of infrared signal luminous point on screen that photoelectric pen or Optoelectric teacher's pointer send, and then can get access to the coordinate figure of photoelectric pen clicking point on screen or the indicated actual coordinate value of Optoelectric teacher's pointer.Process chip on the circuit is sent to computer with these data by communication cable, realizes the function of mouse action or electronic whiteboard software again by the driver of operating system layer.Because optical filtering has the restriction of range of receiving, so recipient is far away more apart from screen, the screen of support (but write area) is just big more, must preestablish the wide-angle area (being the areal extent that optical filtering receives light) of optical filtering before therefore using earlier.
The beneficial effect that the present invention is compared with the prior art is: form relatively simply, less expensive has system and connects stable, the Projection Display high definition is highlighted, can effectively provide sound power to amplify output, particularly can realize friendly human-computer interaction dialogue, infrared remote control is easy to operate.Can be widely used in places such as multimedia teaching, meeting, army, amusement, family.
Description of drawings
Accompanying drawing is the composition block diagram of the specific embodiment of the present invention.
Embodiment
Multimedia interactive projection machine tutoring system as shown in drawings, figure one is the outside principle schematic of multimedia interactive projection machine, comprise projection screen 1, infrared light pen 2, projector 3, photoelectricity is handled module 4, and when projector worked, it was 9600 * 9600 invisible dot matrix that used projection screen picture 1 is subdivided into, when infrared light pen 2 is clicked projection screen 1, (x y) is reflected to photoelectricity processing module 4 and analyzes deciphering the coordinate figure A of clicking point A, and the gained data are sent to the microsystem of projector 3 the insides, carry out calculation process, the control command that draws similar mouse is carried out interactive operation.
Figure two is multimedia interactive projection machine portion functional-block diagrams, comprise DLP projector 1, photoelectricity is handled module 2, embedded computer system 3, power supply 4, audio-frequency power amplifier 5, projection screen 6 etc., embedded computer system, comprise central processing unit, be used for IDE or ATA hard disk communication module that information is exchanged visits and stored, the DVD drive circuit, the sound card circuit, video card circuit and interface thereof, be used to be connected to the network interface card circuit of INTENT network, and keyboard, mouse unit, hard disk ST3802110AS, its capacity: 160G SATA interface, rotating speed: 5400rpm, cpu central processing unit adopts Pentium 1.6M, and 400 SL8MU, internal memory adopt modern DDR400/1GMB.The sound card circuit adopts Realtek Realtek ALC883 chip.The video card circuit adopts Integrated in
852GM GMCH display card 64M.
Optical-electric module receives after the infrared signal of reflection, has the 12LE5410 integrated circuit to receive and amplify, and after the DSP computing, signal is delivered to A3P125AD and is for conversion into digital signal and delivers to computer and further handle.
Be provided with the DLP circuit that is connected with the video card circuit, be provided with and comprise that bulb circuit is used for reducing image process and provides the bulb of visible rays to light control system, be provided with and be used for lighting the DMD micro mirror 7 of the GTG signal that control system finishes image under cooperating and driving the DLP drive circuit 5 and the DMD micro mirror drive circuit 6 of its usefulness at bulb.
Also be provided with audio process and reach the TDA7273A audio power amplifying circuit 2E and the loud speaker 2F of level thereafter, be used for audio signal and sound and amplify, realize ANTENN AUDIO teaching lecture.
Between described sound card circuit 1D and audio process TPAO172, be provided with the audio frequency bluetooth module.
Its main signalling channel is as follows:
When (1) the A photosignal of ordering reflexes to the photoelectricity processing module, carries out computing comparison → analog-to-digital conversion → cpu central processing unit → video card circuit → data compilation → D/A switch → operation layer → DLP drive circuit → change projected image → camera lens → Projection Display by DSP after amplifying through filtering;
(2) DLP drive circuit → MCU → bulb starting circuit → bulb → camera lens → Projection Display;
(3) simulated audio signal of sound card circuit → audio process TPAO172 → audio power amplifying circuit TDA7273A → loud speaker.
(4) light signal fed back → filtering reception → DSP computing (12LE5410) → A3P125AD → digital signal → computer interface → CPU.
Can realize the overall process of multimedia overhead projector displayed image and transmission sound easily by above-mentioned this embodiment of signalling channel.
Above content be in conjunction with concrete preferred implementation to the further illustrated in greater detail that the present invention did, can not assert that concrete enforcement of the present invention is confined to these explanations.For the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (6)
1. multimedia interactive projection machine, comprise the cpu central processing unit on the embedded computer, the DVD drive circuit that is connected with described central processing unit respectively, sound card circuit, video card circuit, USB interface module, be used to collect the light triggering signal, and the DSP circuit that carries out comparison operation, and the optical projection system that is used to go back original image.It is characterized in that:
Be provided with the DLP project circuit that is connected with video card circuit on the described embedded computer, described DLP circuit comprises bulb and bulb circuit, provide the bulb of light source to light control circuit, form the DLP optical projection system, be provided with the digital micro-mirror device that is used to finish visual GTG signal, the DLP drive circuit that drives its usefulness, also being provided with the DLP microcontroller is the DLP management control system at center.
Be provided with photoelectricity receive to amplify, the dsp system of conversion Calculation and three big systems such as embedded computer system that CPU is the center and DLP projector, thereby realized the interaction effect that multimedia projector is marvellous.
2. according to the described multimedia interactive projection machine of claim 1, it is characterized in that: also be provided with audio process and reach the audio frequency audio power amplifying circuit and the loud speaker of level thereafter.
3. according to claim 1 or 2 described multimedia interactive projection machines, it is characterized in that: between described sound card circuit and audio process, be provided with the audio frequency bluetooth module.
4. it is characterized in that according to the described multimedia interactive projection machine of claim 1: also be provided with the many groups USB2.0/IEEE1394 interface circuit that is connected with described central processing unit.
5. according to the described multimedia interactive projection machine of claim 1, it is characterized in that: also be provided with recreation, industry control/numerical control and the serial ports of exchanging visits with the INTER chipset of described central processing unit.
6. according to the described multimedia interactive projection machine of claim 1, be provided with the network interface card circuit of receiving the INTENT network, described network interface card circuit is connected with described central processing unit, so that the user directly roams in network by native system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910111003A CN101631218A (en) | 2009-02-03 | 2009-02-03 | Multimedia interactive projection machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910111003A CN101631218A (en) | 2009-02-03 | 2009-02-03 | Multimedia interactive projection machine |
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| Publication Number | Publication Date |
|---|---|
| CN101631218A true CN101631218A (en) | 2010-01-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200910111003A Pending CN101631218A (en) | 2009-02-03 | 2009-02-03 | Multimedia interactive projection machine |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102968219A (en) * | 2012-01-04 | 2013-03-13 | 北京理工大学 | Interactive computer input equipment on basis of graphic processing |
| CN103179366A (en) * | 2011-12-14 | 2013-06-26 | 天瀚科技股份有限公司 | Projection application device and projection device and image output device combined system |
| CN108874274A (en) * | 2018-06-13 | 2018-11-23 | 合肥联宝信息技术有限公司 | A kind of method for controlling projection and device |
-
2009
- 2009-02-03 CN CN200910111003A patent/CN101631218A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103179366A (en) * | 2011-12-14 | 2013-06-26 | 天瀚科技股份有限公司 | Projection application device and projection device and image output device combined system |
| CN102968219A (en) * | 2012-01-04 | 2013-03-13 | 北京理工大学 | Interactive computer input equipment on basis of graphic processing |
| CN108874274A (en) * | 2018-06-13 | 2018-11-23 | 合肥联宝信息技术有限公司 | A kind of method for controlling projection and device |
| CN108874274B (en) * | 2018-06-13 | 2021-10-22 | 合肥联宝信息技术有限公司 | Projection control method and device |
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