CN201266365Y - Touch control electronic instruction device - Google Patents
Touch control electronic instruction device Download PDFInfo
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- CN201266365Y CN201266365Y CNU2008202004219U CN200820200421U CN201266365Y CN 201266365 Y CN201266365 Y CN 201266365Y CN U2008202004219 U CNU2008202004219 U CN U2008202004219U CN 200820200421 U CN200820200421 U CN 200820200421U CN 201266365 Y CN201266365 Y CN 201266365Y
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Abstract
The utility model discloses a touch electronic teaching tool which comprises a computer, a projector connected with the computer, and an electronic board; the electronic board comprises a panel; the left side and the lower side of the panel are respectively provided with an emitter; the right side and the upper side of the panel are respectively provided with a receiver corresponding to the emitter; the panel is also provided with a main controller which controls the operation of the emitters and the receivers. The main controller and the computer are connected; the emitters are all provided with a plurality of infrared emitting tubes; infrared receiving tubes which correspond to the infrared emitting tubes of the emitters one to one and have the same number as the infrared emitting tubes are arranged on the receivers. The utility model aims at providing a touch electronic teaching tool which can write freely without dust.
Description
[technical field]
The utility model relates to the touch-control electronic instructional device.
[background technology]
The teaching of traditional blackboard, chalk pattern writing on the blackboard on a common blackboard can't be stored, and writes and has expired and need wipe.Along with development of science and technology, single in the past form of teaching progressively is enhanced, multi-media classroom is with by all kinds of means content of courses presentation mode, theory teaching and object teaching are combined, the multiple sense organ participation in learning of mobilizing students has promoted Teaching Quality, has improved efficiency of teaching, has enlarged teaching scale.At present, in the application of multi-media classroom, solution commonly used is based on projector, real object exhibition booth, computer etc.Such solution can easily be presented on the contents of courses such as material object, computer teaching courseware, video, audio frequency in face of the student, yet in most teaching practices, traditional " writing on the blackboard " still is the most frequently used teaching means, because by writing on the blackboard, the teacher can insert the content of courses off the cuff, can control teaching process effectively.So the mode that multi-media classroom and writing on the blackboard combine becomes the teaching pattern that many teachers like.The content of courses that multimedia courseware has brought brand-new teaching pattern and abundanter image to the student has also brought a lot of new problems simultaneously.
Still can't break away from traditional chalk during teacher's writing on the blackboard, blackboard brings bothersome dust pollution; Teacher's writing on the blackboard can't with the combination of teacher's multimedia courseware, be not easy to the student and understand; The quick broadcast of multimedia courseware, the student can't normally take down notes; The mechanical broadcast of multimedia courseware such as Word, PowerPoint, the speaker can't mark immediately, has reduced the interactive of speech.Multimedia teaching also lacks a kind of teacher's the platform of giving lessons, and is used for remedying the wide gap between traditional traditional instruction and the multimedia courseware teaching.Be necessary to improve prior art for this reason.
[utility model content]
The utility model has overcome the deficiency of above-mentioned technology, the touch-control electronic instructional device of provide a kind of dust-free writing, arbitrarily writing.
For achieving the above object, the utility model has adopted following technical proposal:
The touch-control electronic instructional device, include computer, the projector that is connected with computer, electron plate, this electron plate includes panel, it is characterized in that the left of panel and below be respectively equipped with transmitter, the right-hand of panel and above be respectively equipped with the receiver corresponding with transmitter, also be provided with the master controller of control transmitter and receiver operation on panel, this master controller links to each other with computer.
Aforesaid touch-control electronic instructional device, it is characterized in that all being respectively equipped with on the transmitter a plurality of infrared transmitting tubes, be provided with the infrared receiving tube identical and relative one by one at receiver, be provided with the infrared receiving tube identical and relative one by one with the infrared transmitting tube number of transmitter at receiver with the infrared transmitting tube number of transmitter.
Aforesaid touch-control electronic instructional device is characterized in that master controller includes:
Governor circuit, control transmitter and receiver carry out work;
The expansion I/O circuit is expanded the I/O mouth of governor circuit;
The growth data storer stores intercommunication data between governor circuit and the computer through the expansion I/O circuit;
Usb circuit is connected governor circuit with computer.
Aforesaid touch-control electronic instructional device is characterized in that transmitter includes:
The emission decoding scheme will be passed to radiating circuit after the decoding of the control signal that transports in the growth data storer;
Radiating circuit, the control signal that receives after the emission decoding scheme is deciphered is carried out luminous;
Testing circuit detects the radiating circuit result whether operate as normal also will detect and passes to the growth data storer, with the governor circuit of announcement.
Aforesaid touch-control electronic instructional device is characterized in that receiver includes:
Receiving circuit is used to receive the signal from the radiating circuit of corresponding transmitter;
Sample circuit will be passed to reception decoding scheme and error amplifying circuit respectively after receiving circuit samples signal Processing;
Receive decoding scheme, will pass to the growth data storer after the signal interpretation;
Error amplifying circuit is passed to governor circuit with error signal, and governor circuit is passed to computer with signal by usb circuit after above-mentioned two class signals are analyzed and handled.
The beneficial effects of the utility model are:
1, carries out comprehensive lifting for traditional teaching notion, shown the revolution of mode of operation and the breakthrough of man-machine interaction especially, can effectively show different teachers' individual character and styles of teaching;
2, not only the function of traditional multi-media classroom is strengthened significantly, it has also crossed over a limit, just as a magic plate, proprietary sight is all concentrated on here, make the classroom be full of vigor, make students can come to realize each teacher's happiness, anger, grief and joy, can experience the strength that knowledge is brought to them.The most valuable is that essence of education is able to performance incisively and vividly here, reaches the boundary of " instructing in words and by deeds ";
3, outward appearance is similar to common blank, can write in the above with common soft pen, also can write in the touch-control electronic writing on the blackboard by finger, the touch-control electronic plate is linked to each other with host computer by a USB line, computer links to each other with projector again, and the content of computer can project to the touch-control electronic plate, and the operation of touch-control electronic plate and content can feed back to computer, can also be saved in floppy disk, hard disk or be transferred to network, also can directly print;
4, not only inherit traditional teaching custom and impression, make those teachers that are unfamiliar with PC operation left-hand seat easily, and the information that for students, is more readily understood and accepts to transmit from teacher, for carrying forward the modern teaching theory, provide a good carrier, for modern teaching has been expanded unlimited imagination space.
5, realize dust-free writing, arbitrarily write, long-range interchange etc.
[description of drawings]
Be described in further detail below in conjunction with accompanying drawing and embodiment of the present utility model:
Fig. 1 is a synoptic diagram of the present utility model;
The block scheme of Fig. 2 for being connected between the transmitter of left of the present utility model and right-hand receiver and the master controller;
The block scheme of Fig. 3 for being connected between the transmitter of below of the present utility model and top receiver and the master controller;
Fig. 4 is the circuit theory diagrams of master controller of the present utility model;
Fig. 5 is the circuit theory diagrams of transmitter of the present utility model;
Fig. 6 is the circuit theory diagrams of receiver of the present utility model.
[embodiment]
As shown in Figure 1, the utility model is introduced a kind of touch-control electronic instructional device, includes computer 1, projector 2,3 three hardware of touch-control electronic plate, and projector 2, touch-control electronic plate 3 all are connected with computer 1.Described touch-control electronic plate 3 includes panel 4, the left of panel 4 and below be respectively equipped with transmitter 5,6, the right-hand of panel 4 and above be respectively equipped with and transmitter 5, the receiver 7 of 6 correspondences, 8, on panel 4, also be provided with control transmitter 5,6 and receiver 7, the master controller 9 of 8 work, this master controller 9 is to link to each other with computer 1 by USB interface, not only can carry out communication between master controller 9 and the computer 1 by this USB interface, and can realize that 1 pair of master controller 9 of computer powers, when master controller 9 connected by USB interface and computer 1, touch-control electronic plate 3 will move normally.All be respectively equipped with a plurality of infrared transmitting tube LED on the transmitter 5,6, be provided with the infrared receiving tube RLED identical and relative one by one at receiver 7, be provided with the infrared receiving tube RLED identical and relative one by one with the infrared transmitting tube LED number of transmitter 6 at receiver 8 with the infrared transmitting tube number of transmitter 5.The infrared ray that the infrared transmitting tube of transmitter 5,6 sends X, Y direction before being close to screen are gathered into infrared ray matrix, and whether the infrared receiving tube of receiver 7,8 has infrared ray by object blocks by the scanning that does not stop, and detect the also touch of consumer positioning.When the instructor uses, transmitter 5 on panel 4,6 and receiver 7, in 8 zone lines that surround, content with the teaching pen of this matched with devices or common writing and teachings such as pen, pattern according to horizontal ordinate, panel 4 is divided into some spots, the point X of place of written contents like this, Y direction infrared receiving tube will not receive the infrared signal that corresponding infrared transmitting tube LED sends, the point X of place of written contents not, Y direction infrared receiving tube RLED will receive the infrared signal that corresponding infrared transmitting tube LED sends, after handling, passes in the computer 1 by USB interface again the infrared signal that 9 couples of all infrared receiving tube RLED of master controller receive, 1 pair of written contents point place (the some place that the infrared signal of infrared transmitting tube emission is blocked) on touch-control electronic plate 3 of computer positions demonstration, computer 1 amplifies written contents by projector 2 and is incident upon touch-control electronic plate 3 and shows, realizes electronic instruction.
2-6 further describes the utility model below in conjunction with circuit theory diagrams, and as Fig. 2,3,4, master controller 9 includes governor circuit 10, expansion I/O circuit 11, growth data storer 12, usb circuit 13.Governor circuit 10 control transmitters 5,6 and receiver 7,8 carry out work; Expansion I/O circuit 11 is expanded the I/O mouth of governor circuit 10; Growth data storer 12 stores intercommunication data between governor circuit 10 and the computer 1 through expansion I/O circuit 11; Usb circuit 13 is connected governor circuit 10 with computer 1.Governor circuit 10 includes the main control chip U1 that a model is PIC16C745, and main control chip U1 plays transmitter 5,6 and receiver 7,8 control actions.The pin of main control chip U1 is 6. as the control input end RA4 that starts main control chip U1 work, it is by switch RS232 ground connection, be connected on the power supply VCC by the 6th resistance R 6 simultaneously,, can realize starting or closing main control chip U1 by being switched on or switched off switch RS232; Pin D0, D1, D2, D3, D4, D5, D6, D7 are as the input end of expansion I/O; Pin 4., 5. the signal output part of expansion I/O circuit 11 is controlled in conduct; Pin
Signal output part RCO as 5,6 work of control transmitter; Pin
As the signal end of main control chip U1 and computer 1 intercommunication data, pin
Stop the signal end of intercommunication data as main control chip U1 and computer 1.Expansion I/O circuit 11 comprises that two models all are expansion I/O chip U2, the U3 of 74HC573, and pin D0, the D1 of expansion I/O chip U3, D2, D3, D4, D5, D6, D7 are connected with pin D0, D1, D2, D3, D4, D5, D6, the D7 of main control chip U1 respectively as input end; Pin A8, A9, A10, A11, A12 are as expansion I/O; Pin
5. be connected with the pin of main control chip U1.Pin D0, the D1 of expansion I/O chip U2, D2, D3, D4, D5, D6, D7 are connected with pin D0, D1, D2, D3, D4, D5, D6, the D7 of main control chip U1 respectively as input end; Pin A0, A1, A2, A3, A4, A5, A6, A7 are as expansion I/O; Pin
4. be connected with the pin of main control chip U1.Growth data storer 12 comprises that model is the growth data storage chip U4 of 62C256AL, its pin A0, A1, A2, A3, A4, A5, A6, A7 are connected with pin A0, A1, A2, A3, A4, A5, A6, the A7 of expansion I/O chip U2, pin A8, A9, A10, A11, A12 are connected with pin A8, A9, A10, A11, the A12 of expansion I/O chip U3, and pin D0, D1, D2, D3, D4, D5, D6, D7 are connected with pin D0, D1, D2, D3, D4, D5, D6, the D7 of main control chip U1.Usb circuit 13 comprises USB interface, and its low pressure input end D-is connected with the end of switch J1, and the switch J1 other end can be selected one and pin main control chip U1
Connect, its high voltage input terminal D+ is connected with the end of switch J2, and the switch J2 other end can be selected one and pin main control chip U1
Connect; Pin as switch J1 and main control chip U1
Connect the pin of switch J2 and main control chip U1
The time, main control chip U1 is by USB interface and computer 1 intercommunication data; Pin as switch J1 and main control chip U1
Connect the pin of switch J2 and main control chip U1
The time, main control chip U1 and computer 1 stop the intercommunication data.
As Fig. 2,3,5, the circuit structure of transmitter 5, transmitter 6 is identical, includes emission decoding scheme 14, radiating circuit 15, testing circuit 16.Emission decoding scheme 14 is passed to radiating circuit 15 after the control signal that transports in the growth data storer 12 is deciphered, radiating circuit 15 receives control signal and carries out luminous, testing circuit 16 detects radiating circuit 15 result whether operate as normal also will detect and passes to growth data storer 12, with the main control chip U1 of announcement.Emission decoding scheme 14 is that a model is the coding chip U6 of 74HC138, the pin of coding chip U6 1., 2., 3. as input end, and be connected pin with pin A0, A1, the A2 of growth data storage chip U4 by interface CON1
10., 9., 7. as output terminal, coding chip U6 deciphers the data of the luminous signal in the growth data storer 12, then by the output terminal pin
10., 9., 7. issue radiating circuit 15.Radiating circuit 15 includes a plurality of control triodes and a plurality of infrared transmitting tube LED, and the signal controlling infrared transmitting tube of control triode reception coding chip U6 output is luminous.Adopt 8 triodes and 32 infrared transmitting tube LED in the present embodiment, the light that transmitter 5, transmitter 6 32 infrared transmitting tubes separately send just forms 64 dot matrix.Five, the the the 6th, the 7th, the 8th, the 9th, the tenth, the 11, the base stage of the 12 triode Q5, Q6, Q7, Q8, Q9, Q10, Q11, Q12 respectively with the pin of growth data storage chip U4
10., 9., 7. connect, the emitter of the 5th triode Q5 meets power supply VCC, and the positive pole of collector and first, the 9th, the 17, the 25 infrared transmitting tube D1, D9, D17, D25 is connected; The emitter of the 6th triode Q6 meets power supply VCC, and D2, the D10 of collector and second, the tenth, the 18, the 26 infrared transmitting tube, D18, D26 positive pole are connected; The emitter of the 7th triode Q7 meets power supply VCC, and D3, the D11 of collector and the 3rd, the 11, the 19, the 27 infrared transmitting tube, D19, D27 positive pole are connected; The emitter of the 8th triode Q8 meets power supply VCC, and the positive pole of collector and the 4th, the 12, the 20, the 28 infrared transmitting tube D4, D12, D20, D28 is connected; The emitter of the 9th triode Q9 meets power supply VCC, and the positive pole of collector and the 5th, the 13, the 21, the 29 infrared transmitting tube D5, D13, D21, D29 is connected; The emitter of the tenth triode Q10 meets power supply VCC, and the positive pole of collector and the 6th, the 14, the 22, the 30 infrared transmitting tube D6, D14, D22, D30 is connected; The emitter of the 11 triode Q11 meets power supply VCC, and the positive pole of collector and the 7th, the 15, the 23, the 31 infrared transmitting tube D7, D15, D23, D31 is connected; The emitter of the 12 triode Q12 meets power supply VCC, and the positive pole of collector and the 8th, the 16, the 24, the 3rd Japanese waxwing outer power valve D8, D16, D24, D32 is connected.Testing circuit 16 includes 4 triode Q1, Q2, Q3, Q4, and model is the test chip U9 of 74HC04, two coding chip U8, U7 that model is 74HC138; The collector of the first triode Q1 is connected with the negative pole of first to the 8th infrared transmitting tube, emitter is connected with the 21 resistance R 21 1 ends with the 5th resistance R 5 of parallel connection, the other end ground connection of parallel resistance, 2. the base stage of the first triode Q1 is connected with the pin of test chip U9 by first resistance R 1; The collector of the second triode Q2 is connected with the negative pole of the 9th to the 16 infrared transmitting tube, emitter is connected with the 21 resistance R 21 1 ends with the 5th resistance R 5 of parallel connection, the other end ground connection of parallel resistance, 4. the base stage of the second triode Q2 is connected with the pin of test chip U9 by second resistance R 2; The collector of the 3rd triode Q3 is connected with the negative pole of power valve outside the 17 to the 20 quatre, emitter is connected with the 21 resistance R 21 1 ends with the 5th resistance R 5 of parallel connection, the other end ground connection of parallel resistance, 6. the base stage of the 3rd triode Q3 is connected with the pin of test chip U9 by the 3rd resistance R 3; The collector of the 4th triode Q4 is connected with the negative pole of power valve outside the 25 to the 3rd Japanese waxwing, emitter is connected with the 21 resistance R 21 1 ends with the 5th resistance R 5 of parallel connection, the other end ground connection of parallel resistance, 8. the base stage of the 4th triode Q4 is connected with the pin of test chip U9 by the 4th resistance R 4; The pin of test chip U9 1., 3., 5., 9. with the pin of coding chip U8
Connect, the pin of coding chip U8 4., 5. connect with the pin of coding chip U7 7., 9., 10.,
Connect, 1., 2., 3. the pin of coding chip U7 passes through interface CON1 and is connected with pin A5, A6, the A7 of main control chip U1,4., 5. the pin of coding chip U7 connects by interface CON1 and is connected with pin A8, A9, the A10 of main control chip U1, test chip U9 can detect the fine or not situation of 32 infrared transmitting tubes, and the data that detect are passed to growth data storer 12 after by two coding chip U8, U7 decodings.
As Fig. 2,3,6, the circuit structure of receiver 7, receiver 8 is identical, includes receiving circuit 17, and sample circuit 18 receives decoding scheme 19, error amplifying circuit 20; Receiving circuit 17 is used to receive the signal from the radiating circuit of respective transmitter, and will receive signal and pass to sample circuit 18, sample circuit 18 is passed to respectively after with this signal Processing and is received decoding scheme 19 and error amplifying circuit 20, receive decoding scheme 19 and will pass to growth data storer 12 after the signal interpretation, error amplifying circuit 20 is passed to main control chip U1 with error signal, and main control chip U1 passes to computer with signal by usb circuit after above-mentioned two class signals are analyzed and handled.Receiving circuit 17 includes 32 infrared receiving tube RLED, and they are corresponding with 32 infrared transmitting tubes respectively, and the infrared receiving tube negative pole meets power supply VCC.Sample circuit 18 comprises that two models are the sampling A U10 of 74HC4067M, U12, and these two chips are gathered the signal that 16 infrared receiving tubes receive respectively, and 9. 2. the pin of sampling A U10 arrive,
Arrive
And 9. 2. the pin of sampling A U12 arrive,
Arrive
Be connected the pin of sampling A U10 with infrared transmitting tube is anodal respectively as the signals collecting end
And the pin of sampling A U12
As signal output part.Receive decoding scheme 19 and include the coding chip U11 that a model is 74HC139,7. 4. its pin arrive as the decoded signal input end, wherein, and 4., 6. the connect together pin of back and sampling A U10 of pin
Connect, 5., 7. pin connects together afterwards and the pin of sampling A U12
Connect, the pin of coding chip U11 2., 3.,
As decoding output terminal, pin 2., 3.,
Be connected pin by interface CON2 with pin A4, A5, A6, the A7 of growth data storage chip U4
Be connected with pin A8, A9, the A10 of growth data storage chip U4 simultaneously by interface CON2.Error amplifying circuit 20 includes the error amplification chip U13 that a model is 74HC4066, its pin
As input end, pin
Be connected with an end of the 8th resistance R 8 and the collector of the 17 triode Q17 simultaneously, the other end of the 8th resistance R 8 is connected with power supply VCC, the grounded emitter of the 17 triode Q17, the base stage of the 17 triode Q17 is by the output terminal pin of the 9th resistance R 9 with sampling A U10
Connect; And pin
Be connected with an end of the tenth resistance R 10 and the collector of the 18 triode Q18 simultaneously, the other end of the tenth resistance R 10 is connected with power supply VCC, the grounded emitter of the 18 triode Q18, the base stage of the 18 triode Q18 is by the output terminal pin of the 11 resistance R 11 with sampling A U12
Connect; Error is amplified the pin of chip U13 2. as output terminal, and by being connected on the pin of main control chip U1 behind the chip U5 in interface CON2 and the master controller
Claims (5)
1, touch-control electronic instructional device, include computer (1), the projector (2) that is connected with computer (1), electron plate (3), this electron plate (3) includes panel (4), it is characterized in that being respectively equipped with transmitter (5,6) in the left and the below of panel (4), be respectively equipped with the receiver (7,8) corresponding with transmitter (5,6) in the right-hand and top of panel (4), also be provided with the master controller (9) of control transmitter (5,6) and receiver (7,8) work on panel (4), this master controller (9) links to each other with computer (1).
2, touch-control electronic instructional device according to claim 1, it is characterized in that all being respectively equipped with a plurality of infrared transmitting tubes (LED) on the transmitter (5,6), be provided with the infrared receiving tube (RLED) identical and relative one by one at receiver (7), be provided with the infrared receiving tube (RLED) identical and relative one by one with infrared transmitting tube (LED) number of transmitter (6) at receiver (8) with infrared transmitting tube (LED) number of transmitter (5).
3, touch-control electronic instructional device according to claim 2 is characterized in that master controller (9) includes:
Governor circuit (10), control transmitter (5,6) and receiver (7,8) carry out work;
Expansion I/O circuit (11) is expanded the I/O mouth of governor circuit (10);
Growth data storer (12) stores intercommunication data between governor circuit (10) and the computer (1) through expansion I/O circuit (11);
Usb circuit (13) is connected governor circuit (10) with computer (1).
4, touch-control electronic instructional device according to claim 3 is characterized in that transmitter includes:
Emission decoding scheme (14) will be passed to radiating circuit (15) after the decoding of the control signal that transports in the growth data storer (12);
Radiating circuit (15), the control signal that receives after emission decoding scheme (14) is deciphered is carried out luminous;
Testing circuit (16) detects radiating circuit (15) result whether operate as normal also will detect and passes to growth data storer (12), with the governor circuit (10) of announcement.
5, touch-control electronic instructional device according to claim 4 is characterized in that receiver includes
Receiving circuit (17) is used to receive the signal from the radiating circuit of corresponding transmitter;
Sample circuit (18) is passed to respectively after will sampling signal Processing from receiving circuit (17) and is received decoding scheme (19) and error amplifying circuit (20);
Receive decoding scheme (19), will pass to growth data storer (12) after the signal interpretation;
Error amplifying circuit (20) is passed to governor circuit (10) with error signal, and governor circuit (10) is passed to computer (1) with signal by usb circuit (13) after above-mentioned two class signals are analyzed and handled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202004219U CN201266365Y (en) | 2008-09-12 | 2008-09-12 | Touch control electronic instruction device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202004219U CN201266365Y (en) | 2008-09-12 | 2008-09-12 | Touch control electronic instruction device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201266365Y true CN201266365Y (en) | 2009-07-01 |
Family
ID=40832739
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008202004219U Expired - Fee Related CN201266365Y (en) | 2008-09-12 | 2008-09-12 | Touch control electronic instruction device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201266365Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101847064A (en) * | 2010-05-09 | 2010-09-29 | 中山佳时光电科技有限公司 | Embedded PC electronic whiteboard |
| CN102053773A (en) * | 2009-11-10 | 2011-05-11 | 吴子莲 | Electronic blackboard |
| CN105976661A (en) * | 2016-06-25 | 2016-09-28 | 中山佳时光电科技有限公司 | Movable-type teaching touch integrated machine |
| CN108446033A (en) * | 2018-03-05 | 2018-08-24 | 山东农业大学 | Projecting apparatus handwriting equipment |
| CN109358767A (en) * | 2018-09-26 | 2019-02-19 | 青岛海信电器股份有限公司 | Method of toch control, device and projection device based on projection screen |
-
2008
- 2008-09-12 CN CNU2008202004219U patent/CN201266365Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102053773A (en) * | 2009-11-10 | 2011-05-11 | 吴子莲 | Electronic blackboard |
| CN101847064A (en) * | 2010-05-09 | 2010-09-29 | 中山佳时光电科技有限公司 | Embedded PC electronic whiteboard |
| CN105976661A (en) * | 2016-06-25 | 2016-09-28 | 中山佳时光电科技有限公司 | Movable-type teaching touch integrated machine |
| CN108446033A (en) * | 2018-03-05 | 2018-08-24 | 山东农业大学 | Projecting apparatus handwriting equipment |
| CN109358767A (en) * | 2018-09-26 | 2019-02-19 | 青岛海信电器股份有限公司 | Method of toch control, device and projection device based on projection screen |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20090701 Termination date: 20100912 |