CN102854460A - Key state detection method for electronic pointer, electronic white board and electronic pointer - Google Patents
Key state detection method for electronic pointer, electronic white board and electronic pointer Download PDFInfo
- Publication number
- CN102854460A CN102854460A CN2011101819435A CN201110181943A CN102854460A CN 102854460 A CN102854460 A CN 102854460A CN 2011101819435 A CN2011101819435 A CN 2011101819435A CN 201110181943 A CN201110181943 A CN 201110181943A CN 102854460 A CN102854460 A CN 102854460A
- Authority
- CN
- China
- Prior art keywords
- electronic
- integral value
- teacher pointer
- button
- integral
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Drawing Aids And Blackboards (AREA)
Abstract
The invention relates to a key state detection method for an electronic pointer, an electronic white board and an electronic pointer and belongs to the technical field of computer multi-media. The key state detection method includes steps of transmitting: a transceiving circuit of the electronic white board transmits transmission signals; receiving: the electronic pointer receives the transmission signals and transmits reflection signals based on the transmission signals, and the transceiving circuit of the electronic white board receives the reflection signals; and detecting: the electronic white board detects the state of a key on the electronic pointer according to the attenuation speed of the reflection signals. The key state detection method detects the key state of the electronic pointer according to the theory that the attenuation speed of the reflection signals reflected by the electronic pointer is different under different key states, so that users can achieve commonly-used function switching conveniently by directly operating the key on the electronic pointer.
Description
Technical field
The present invention relates to technical field of computer multimedia, more particularly, relate to a kind of detection method, electronic whiteboard and electronic teacher pointer of electronic teacher pointer key-press status.
Background technology
It is once huge change on the history of education that interactive electric whiteboard replaces traditional blackboard.Electronic whiteboard is a kind of multimedia tool that can be used for the occasions such as teaching, training, meeting, demonstration of rising along with the development of multimedia technology, computer technology and display technique late 1990s.It is combined the most closely with traditional teaching, demonstration mode, replace traditional blackboard with special digital white boards (perhaps projection screen), can write or the analog mouse function at electronic whiteboard by electronic teacher pointer, its result can directly be shown on the projection screen, breaks away from the constraint of mouse, keyboard.
On principle of work, electronic whiteboard has resistor pressure formula, infrared type, optical induction type, ultrasound wave location, the several types such as induction, wherein induction electronic whiteboard is because bearing accuracy is high, not fragile, can detect the pressure of the electronic teacher pointer supporting with it and be used widely.Usually, induction electronic whiteboard comprises antenna plate, microprocessor and control circuit.Comprise the electromagnetic oscillation circuit with the matching used electronic teacher pointer of this induction electronic whiteboard.In actual use, the electromagnetic wave signal of antenna plate on the electromagnetic oscillation circuit inductance electronic whiteboard of electronic teacher pointer emission and produce vibration, the electromagnetic wave signal that the vibration of electromagnetic oscillation circuit because produces is received by the antenna plate on the electronic whiteboard again.When electronic teacher pointer with respect to the position of electronic whiteboard not simultaneously, its electromagnetic wave signal that reflects also is different, also is to have carried the positional information of electronic teacher pointer with respect to electronic whiteboard in the electromagnetic wave signal that reflects of electronic teacher pointer.The microprocessor of electronic whiteboard is processed the electromagnetic wave signal that receives, obtain electronic teacher pointer with respect to the positional information on the electronic whiteboard, electronic whiteboard passes to main frame with this positional information subsequently, so that main frame can be realized corresponding function according to the operation of electronic teacher pointer in the corresponding position.
Use the electronic teacher pointer of this interactive electric whiteboard to carry out the interactive demonstration system function when switching, the user is generally by pressing or click the button on the electronic whiteboard, or clicks the software function key that is projected on the electronic whiteboard with electronic teacher pointer, and practical function switches.This method complex operation, and can not realize remote-controlled operation, so that the user feels inconvenience deeply.
Summary of the invention
Technical matters to be solved by this invention is the defective for prior art, propose a kind of detection method, electronic whiteboard and electronic teacher pointer of electronic teacher pointer key-press status, adopt method unlike the prior art so that the button of user on can the direct control electronic teacher pointer just can be realized the switching of common function quickly and easily.
In order to solve the problems of the technologies described above, the invention provides a kind of, the detection method of electronic teacher pointer key-press status, this detection method comprises:
Step of transmitting, the function key of electronic teacher pointer generates electromagnetic waves when being pressed, the electromagnetic wave emission transmitted signal that the transmission circuit of electronic whiteboard produces according to electronic teacher pointer; Receiving step, electronic teacher pointer send reflected signal based on transmitted signal after receiving transmitted signal, and the transmission circuit of electronic whiteboard receives this reflected signal;
Detecting step, electronic whiteboard detects the state that is positioned at the button on the electronic teacher pointer according to the rate of decay of reflected signal.
Further, the method also comprises: the standard ratio range relation table corresponding with the state of button that sets in advance first integral value and second integral value.
Wherein, described detecting step comprises:
After transmission circuit is finished emission for the first time, in the time reflected signal is carried out integration at first integral, obtain the first integral value; After transmission circuit is finished emission for the second time, in the time reflected signal is carried out integration at second integral, obtain the second integral value; The described first integral time is greater than the described second integral time;
Detect according to the ratio of first integral value and the second integral value state to the button on the electronic teacher pointer, this detection is specially: judge the standard ratio range under the ratio of first integral value and second integral value; According to described relation table, determine to be positioned at the state of the button on the electronic teacher pointer.
A kind of interactive electric whiteboard comprises:
Transmission circuit is used for the emission transmitted signal, and receives electronic teacher pointer and receive the reflected signal that sends based on this transmitted signal after this transmitted signal;
Testing circuit is used for detecting the state that is positioned at the button on the electronic teacher pointer according to the rate of decay of reflected signal.
Wherein, testing circuit comprises:
Integral unit is used in the time reflected signal being carried out integration at first integral after transmission circuit is finished emission for the first time, obtains the first integral value; After transmission circuit is finished emission for the second time, in the time reflected signal is carried out integration at second integral, obtain the second integral value; The described first integral time is greater than the described second integral time;
Detecting unit is used for detecting according to the ratio of first integral value and the second integral value state to the button on the electronic teacher pointer.Described detecting unit comprises: judging unit, for the standard ratio range under the ratio of judging first integral value and second integral value; Determining unit is used for according to described relation table, determines to be positioned at the state of the button on the electronic teacher pointer.
Further, electronic whiteboard also comprises: setting unit, and for the standard ratio range relation table corresponding with the state of button that sets in advance first integral value and second integral value.
Further, described transmission circuit is antenna plate.
A kind of electronic teacher pointer comprises: electromagnetic oscillation circuit and at least one button;
Described electromagnetic oscillation circuit sends reflected signal to electronic whiteboard after receiving the transmitted signal of transmission circuit emission of electronic whiteboard;
Described button is connected with the electromagnetic oscillation circuit, the reflected signal frequency that control electromagnetic oscillation circuit sends.The different principle of the rate of decay of the utilization of the present invention electromagnetic wave signal that electronic teacher pointer reflects under different key-press status detects the key-press status of electronic teacher pointer, so that the button of user on can the direct control electronic teacher pointer just can be realized the switching of common function quickly and easily.
Description of drawings
Fig. 1 is the schematic diagram of a kind of embodiment of electromagnetic oscillation circuit in the electronic teacher pointer of the present invention;
Fig. 2 is whether the be pressed comparison schematic diagram of electromagnetic wave signal of time reflection of the button of electronic teacher pointer of the present invention;
Fig. 3 is the process flow diagram of detection method one embodiment of electronic teacher pointer key-press status provided by the invention;
Fig. 4 is the schematic diagram of an embodiment of interactive electric whiteboard provided by the invention;
Fig. 5 is the schematic diagram of another kind of embodiment of the electromagnetic oscillation circuit of electronic teacher pointer provided by the invention.
Embodiment
Below in conjunction with accompanying drawing and preferred implementation technical solution of the present invention is elaborated.
The invention provides a kind of detection method of electronic teacher pointer key-press status, in the method, electronic teacher pointer and electronic whiteboard are matching used, at first, when being pressed, the function key of electronic teacher pointer generates electromagnetic waves, the transmission circuit of electronic whiteboard is according to this electromagnetic wave emission transmitted signal, this transmitted signal is the electromagnetic wave signal of certain frequency of the transmission circuit emission of electronic whiteboard, electronic teacher pointer receives after this transmitted signal, the electromagnetic oscillation circuit because that it comprises is responded to and the generation vibration, reflect thus the electromagnetic wave signal of same frequency, be the reflected signal (following electromagnetic oscillation circuit produces the electromagnetic wave signal that reflects same frequency that vibrates and all is called reflected signal) in the receiving step, the transmission circuit of electronic whiteboard can receive the reflected signal that this electronic teacher pointer reflects.After the antenna plate of electronic whiteboard is closed emission, because the quality factor of the electromagnetic oscillation circuit of electronic teacher pointer are very high, still can keep vibration, and reflect reflected signal to the outside, therefore this moment, electronic whiteboard can also receive the reflected signal that electronic teacher pointer reflects.The quality factor here (representing with Q) are the induction reactance value (or capacitor value) of electromagnetic oscillation circuit loop and the ratio of resistance.The rate of decay of the reflected signal that electronic whiteboard reflects according to electronic teacher pointer detects the state (being detecting step) that is positioned at the button on the electronic teacher pointer.
Fig. 1 is the schematic diagram of a kind of embodiment of electromagnetic oscillation circuit in the electronic teacher pointer of the present invention.As shown in Figure 1, this electromagnetic oscillation circuit is composed in parallel by coil L, capacitor C and resistance R, and wherein resistance R is connected with a switch S, and switch S connects with corresponding button.When switch S was opened, when namely button was not pressed, coil L and capacitor C composed in parallel the electromagnetic oscillation circuit; When switch S was closed, when namely button was pressed, coil L, capacitor C and resistance R composed in parallel the electromagnetic oscillation circuit.
For electromagnetic oscillation circuit shown in Figure 1, when switch S was opened (being that button is not pressed), coil L and capacitor C composed in parallel the electromagnetic oscillation circuit, owing to there not being resistance in parallel in the circuit, this moment, the Q value of circuit was larger, and the amplitude of the electromagnetic wave signal that the circuit resonance back reflection goes out is larger; During switch S closed (being that button is pressed), coil L, capacitor C and resistance R compose in parallel the electromagnetic oscillation circuit, and this moment, the Q value of circuit was smaller, and the amplitude of the electromagnetic wave signal that the circuit resonance back reflection goes out is also smaller.As shown in Figure 2, the comparison schematic diagram of the electromagnetic wave signal of reflection when whether being pressed for the button of electronic teacher pointer of the present invention, wherein F1 is the electromagnetic wave signal of button when not being pressed, F2 is the electromagnetic wave signal of button when being pressed, this shows electromagnetic wave signal F1 and F2 for same frequency, the amplitude of F1 is greater than the amplitude of F2.When the Q of circuit value hour, the decay meeting of the electromagnetic wave signal of its reflection is than comparatively fast, this is the known technology of this area.The present invention utilizes this principle exactly, and the method for coming detected electrons teacher's pointer key-press status according to the rate of decay of the electromagnetic wave signal that reflects is provided.
Further, after the transmission circuit of electronic whiteboard was finished emission, electronic whiteboard can also receive the reflected signal that electronic teacher pointer reflects.Respectively after finishing emission twice, within different integral time, reflected signal is carried out integration, obtain two integrated values, the ratio of these two integrated values can characterize the rate of decay of reflected signal, therefore method provided by the invention can according to the ratio of these two integrated values, detect the key-press status of electronic teacher pointer.
The below is take electromagnetic oscillation circuit shown in Figure 1 as example, and a kind of embodiment of the detection method of electronic teacher pointer key-press status of the present invention is elaborated.
Fig. 3 is the process flow diagram of detection method one embodiment of electronic teacher pointer key-press status provided by the invention.As shown in Figure 3, this embodiment may further comprise the steps:
The transmission circuit emission transmitted signal of step 101, electronic whiteboard.
The transmission circuit of electronic whiteboard can be antenna plate, and antenna plate comprises transmission coil and receiving coil, wherein sends coil and is used for the emission transmitted signal.After the transmission coil of antenna plate was launched transmitted signal, electronic teacher pointer can reflect the reflected signal of same frequency, and the receiving coil of antenna plate receives reflected signal.If receiving coil does not receive reflected signal, then the transmission coil of antenna plate continues the emission transmitted signal, until receiving coil receives reflected signal.The microprocessor of electronic whiteboard identifies the reflected signal that electronic teacher pointer reflects, and can detection computations go out electronic teacher pointer with respect to the positional information on the electronic whiteboard according to this galvanic reflex signal.
The transmission circuit of step 102, electronic whiteboard is finished emission for the first time, and electronic whiteboard carries out integration to reflected signal at first integral in the time, obtains first integral value A.
Behind the volume electromagnetic wave that when antenna plate is sensed the electronic pointer function key and is pressed, produces, the transmission coil emission transmitted signal of antenna plate, after the transmission coil of antenna plate is finished emission for the first time, because the electromagnetic oscillation circuit of electronic teacher pointer can be kept vibration, and reflects the reflected signal of same frequency to the outside.Electronic whiteboard carries out integration to this reflected signal at long first integral of time in the time, obtains first integral value A.
The transmission circuit of step 103, electronic whiteboard continues the emission transmitted signal.
The transmission circuit of step 104, electronic whiteboard is finished emission for the second time, and electronic whiteboard carries out integration to reflected signal at second integral in the time, obtains second integral value B.
After the transmission coil of antenna plate is finished emission for the second time, because the electromagnetic oscillation circuit of electronic teacher pointer can be kept vibration, and reflect the reflected signal of same frequency to the outside.Electronic whiteboard carries out integration to this reflected signal at shorter second integral of time in the time, obtains second integral value B.Wherein the first integral time is greater than the second integral time.
Step 105, electronic whiteboard detect the key-press status on the electronic teacher pointer according to the ratio of first integral value A and second integral value B.
By above-described content as can be known, the Q value of the circuit the when circuit when switch S is opened is closed with switch S is different, the rate of decay of reflected signal of their reflections is different like this, and the first integral value A that obtains of electronic whiteboard and the ratio of second integral value B also are different so.The present embodiment can set in advance the standard ratio range relation table corresponding with the state of button of first integral value and second integral value, can obtain by a large amount of experiments particularly.As: the standard ratio range [c1, c2] of supposing A and B is pressed corresponding to button, and the standard ratio range of A and B [c3, c4] is not pressed corresponding to button, and wherein c2 is less than c3.
In the situation that the precognition relation table, the standard ratio range under the ratio of the second integral value B that the first integral value A that determining step 102 obtains and step 104 obtain according to relation table, determines to be positioned at the state of the button on the electronic teacher pointer.For example, if A/B in [c1, c2] scope, determines then that the state of button is for being pressed; If A/B in [c3, c4] scope, determines then that the state of button is not for being pressed.
At last, electronic whiteboard passes to main frame with positional information and the status information (being whether button is pressed) of electronic teacher pointer by cable, main frame is according to this status information, can carry out function and switch, and described function can be the writing of interactive whiteboard, blackboard eraser, left mouse button, right mouse button etc.Realized easily thus the blocked operation of interactive demonstration system common function by the button on the operation electronic teacher pointer.
The different principle of the rate of decay of the detection method utilization electromagnetic wave signal that electronic teacher pointer reflects under different key-press status of the electronic teacher pointer key-press status that the present embodiment provides, by carrying out integration at the reflected signal that under the same key-press status, within different integral time, electronic teacher pointer is reflected, ratio according to two integrated values, the button of user on can the direct control electronic teacher pointer detect the key-press status of electronic teacher pointer, so that just can be realized the switching of common function quickly and easily.
Fig. 4 is the schematic diagram of an embodiment of interactive electric whiteboard provided by the invention.This interactive electric whiteboard and electronic teacher pointer support the use.As shown in Figure 4, this interactive whiteboard comprises transmission circuit 11 and testing circuit 12.Wherein transmission circuit 11 is used for the emission transmitted signal, receives electronic teacher pointer and receives the reflected signal that sends based on transmitted signal after the transmitted signal; Testing circuit 12 is used for the rate of decay according to reflected signal, and the state of the button on the electronic teacher pointer is detected.
Further, testing circuit 12 comprises integral unit 13 and detecting unit 14, integral unit 13 is used for after the transmission circuit of electronic whiteboard is finished emission for the first time, in time the reflected signal that the electromagnetic oscillation circuit of electronic teacher pointer reflects is carried out integration at first integral, obtain first integral value A; After the transmission circuit of electronic whiteboard is finished emission for the second time, in the time reflected signal is carried out integration at second integral, obtain second integral value B; The described first integral time is greater than the described second integral time; Detecting unit 14 is used for according to the ratio of first integral value and second integral value the key-press status on the electronic teacher pointer being detected.
Further, interactive electric whiteboard can also comprise setting unit 15, is used for setting in advance the standard ratio range relation table corresponding with the state of button of first integral value and second integral value.Detecting unit 14 comprises judging unit 16 and determining unit 17, and judging unit 16 is used for judging the affiliated standard ratio range of ratio of first integral value and second integral value; Determining unit 17 is used for according to described relation table, determines to be positioned at the state of the button on the electronic teacher pointer.
Above-mentioned transmission circuit 11 can be specially antenna plate, antenna plate comprises transmission coil and receiving coil, wherein send coil and be used for electromagnetic signals, receiving coil is used for receiving electronic teacher pointer and receives the electromagnetic wave signal that reflects after the transmission coil institute electromagnetic signals.
Above-mentioned testing circuit 12 and acquiring unit 15 can be the part of the microprocessor of electronic whiteboard.Electronic whiteboard obtains positional information and the status information of electronic teacher pointer, and it is passed to main frame, and main frame is according to status information, can carry out function and switch, and described this function can be the writing of interactive whiteboard, blackboard eraser, left mouse button, right mouse button etc.
The present invention also provides a kind of electronic teacher pointer, and this electronic teacher pointer and electronic whiteboard support the use, and specifically comprises electromagnetic oscillation circuit and at least one button, and the number of this button can be for one or more.
Circuit shown in Figure 1 is a kind of specific embodiment of the included electromagnetic oscillation circuit of electronic teacher pointer provided by the invention, and it specifically comprises coil L, capacitor C and resistance R parallel with one another, the series connection of resistance R and switch S, and switch S is connected with button on being positioned at shell.Among this embodiment, the button on the shell is one, and it realizes the blocked operation of two kinds of functions to multipotency.Particularly, after this electromagnetic oscillation circuit receives the transmitted signal of transmission circuit emission of electronic whiteboard, to the reflected signal of electronic whiteboard reflection based on this transmitted signal, so that electronic whiteboard can detect according to the rate of decay of reflected signal the state of button, namely detect button and whether be pressed.
Fig. 5 is the schematic diagram of another kind of embodiment of the electromagnetic oscillation circuit of electronic teacher pointer provided by the invention.As shown in Figure 5, this electromagnetic oscillation circuit comprises coil L, a capacitor C and n resistance parallel with one another, be respectively R1, R2 ..., Rn.Wherein each resistance is connected with a switch, that is, R1 connects with S1, and R2 connects with S2 ..., Rn connects with Sn.Switch S 1, S2 ..., Sn connects with corresponding button respectively.After this electromagnetic oscillation circuit receives the transmitted signal of transmission circuit emission of electronic whiteboard, to the reflected signal of electronic whiteboard reflection based on transmitted signal, so that electronic whiteboard can detect according to the rate of decay of the reflected signal of reflection the state of n button.
In the present embodiment, the resistance of n resistance is different, and the resistance in n resistance after any several resistance parallel connections also is different.Like this under the combination in any state of n button, the Q value that guarantees the electromagnetic oscillation circuit is not identical, thereby so that the ratio of the integrated value of the reflection electromagnetic wave signal that electronic whiteboard obtains is not identical, and then so that electronic whiteboard can detect according to the ratio of this integrated value the key-press status of electronic teacher pointer.
For electromagnetic oscillation circuit shown in Figure 5, the detection method of electronic teacher pointer key-press status shown in Figure 3 also is suitable for.Because there are several assembled state in n button, electromagnetic oscillation circuit shown in Figure 5 also has corresponding several circuit forms, and for example: only have switch S 1 closure, other switches are all opened; Only have switch S 1 and S2 closed, other switches are all opened; Only have switch S 1 and S3 closed, other switches are all opened etc.In this case, need to set in advance the corresponding relation of the standard ratio range of the assembled state of each button and first integral value and second integral value, this is to get access to by a large amount of experimental verifications.By the standard ratio range under the ratio of judging first integral value and second integral value, according to relation table, can determine the state of n button like this.
Fig. 1 and Fig. 5 only show a kind of basic circuit form of electromagnetic oscillation circuit; the present invention is not limited only to this; form basis at this basic circuit increases other devices (for example increasing the number of coil and electric capacity); but still utilize above-mentioned principle can make electronic whiteboard detect the state of button, all belong to the scope that the present invention protects.
Electronic teacher pointer provided by the invention can be the active electronic teacher's pointer, also can be the passive electronic teacher's pointer.If the passive electronic teacher's pointer, it can receive signal by resonant circuit and come not need external power supply, environmental protection for circuit provides energy.The electromagnetic oscillation circuit of electronic teacher pointer provided by the invention is mimic channel, and is with low cost, and the method that detects key-press status is simple.
At last; it should be noted that: more than what enumerate only is specific embodiments of the invention sons; certainly those skilled in the art can change and modification the present invention; if these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, all should think protection scope of the present invention.
Claims (9)
1. the detection method of an electronic teacher pointer key-press status, described electronic teacher pointer and electronic whiteboard support the use, and it is characterized in that, and this detection method comprises:
Step of transmitting, the function key of electronic teacher pointer generates electromagnetic waves when being pressed, the electromagnetic wave emission transmitted signal that the transmission circuit of electronic whiteboard produces according to electronic teacher pointer;
Receiving step, electronic teacher pointer send reflected signal based on transmitted signal after receiving transmitted signal, and the transmission circuit of electronic whiteboard receives this reflected signal;
Detecting step, electronic whiteboard detects the state that is positioned at the button on the electronic teacher pointer according to the rate of decay of reflected signal.
2. detection method according to claim 1 is characterized in that, described detecting step comprises:
After transmission circuit is finished emission for the first time, in the time reflected signal is carried out integration at first integral, obtain the first integral value; After transmission circuit is finished emission for the second time, in the time reflected signal is carried out integration at second integral, obtain the second integral value; The described first integral time is greater than the described second integral time;
Detect according to the ratio of first integral value and the second integral value state to the button on the electronic teacher pointer.
3. detection method according to claim 2 is characterized in that, described method also comprises: the standard ratio range relation table corresponding with the state of button that sets in advance first integral value and second integral value;
Described ratio according to first integral value and second integral value detects the state of the button on the electronic teacher pointer, comprising:
Judge the affiliated standard ratio range of ratio of first integral value and second integral value;
According to described relation table, determine to be positioned at the state of the button on the electronic teacher pointer.
4. an interactive electric whiteboard is characterized in that, described electronic whiteboard comprises:
Transmission circuit is used for the electromagnetic wave emission transmitted signal according to electronic teacher pointer, and receives electronic teacher pointer and receive the reflected signal that sends based on this transmitted signal after this transmitted signal;
Testing circuit is used for detecting the state that is positioned at the button on the electronic teacher pointer according to the rate of decay of reflected signal.
5. interactive electric whiteboard according to claim 4 is characterized in that, described testing circuit comprises:
Integral unit is used in the time reflected signal being carried out integration at first integral after transmission circuit is finished emission for the first time, obtains the first integral value; After transmission circuit is finished emission for the second time, in the time reflected signal is carried out integration at second integral, obtain the second integral value; The described first integral time is greater than the described second integral time;
Detecting unit is used for detecting according to the ratio of first integral value and the second integral value state to the button on the electronic teacher pointer.
6. interactive electric whiteboard according to claim 5 is characterized in that, described electronic whiteboard also comprises: setting unit, and for the standard ratio range relation table corresponding with the state of button that obtains in advance first integral value and second integral value.
7. interactive electric whiteboard according to claim 5 is characterized in that, described detecting unit comprises:
Judging unit is for the standard ratio range under the ratio of judging first integral value and second integral value;
Determining unit is used for according to described relation table, determines to be positioned at the state of the button on the electronic teacher pointer.
8. interactive electric whiteboard according to claim 4 is characterized in that, described transmission circuit is antenna plate.
9. an electronic teacher pointer is characterized in that, comprising: electromagnetic oscillation circuit and at least one button;
Described electromagnetic oscillation circuit sends reflected signal to electronic whiteboard after receiving the transmitted signal of transmission circuit emission of electronic whiteboard;
Described button is connected with the electromagnetic oscillation circuit, the reflected signal frequency that control electromagnetic oscillation circuit sends.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110181943.5A CN102854460B (en) | 2011-06-30 | 2011-06-30 | Key state detection method for electronic pointer, electronic white board and electronic pointer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110181943.5A CN102854460B (en) | 2011-06-30 | 2011-06-30 | Key state detection method for electronic pointer, electronic white board and electronic pointer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102854460A true CN102854460A (en) | 2013-01-02 |
| CN102854460B CN102854460B (en) | 2014-12-10 |
Family
ID=47401211
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110181943.5A Active CN102854460B (en) | 2011-06-30 | 2011-06-30 | Key state detection method for electronic pointer, electronic white board and electronic pointer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102854460B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0651905A (en) * | 1992-07-28 | 1994-02-25 | Seiko Epson Corp | Liquid crystal display device with integrated tablet |
| US7084933B2 (en) * | 2002-11-14 | 2006-08-01 | Lg.Philips Lcd Co., Ltd. | Touch panel for display device |
| CN1825262A (en) * | 2006-01-10 | 2006-08-30 | 凌广有 | Electronic teacher pointer |
| CN101071344A (en) * | 2006-05-12 | 2007-11-14 | 深圳市巨龙科教高技术股份有限公司 | Electronic pen for interactive electronic white board |
| CN101539816A (en) * | 2009-04-16 | 2009-09-23 | 台均科技（深圳）有限公司 | Electromagnetic pen, electromagnetic signal transmitting method, processing method, device and equipment |
| US20100156831A1 (en) * | 2008-12-18 | 2010-06-24 | Dana Gene Doubrava | Dual Pen Interactive Whiteboard System |
-
2011
- 2011-06-30 CN CN201110181943.5A patent/CN102854460B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0651905A (en) * | 1992-07-28 | 1994-02-25 | Seiko Epson Corp | Liquid crystal display device with integrated tablet |
| US7084933B2 (en) * | 2002-11-14 | 2006-08-01 | Lg.Philips Lcd Co., Ltd. | Touch panel for display device |
| CN1825262A (en) * | 2006-01-10 | 2006-08-30 | 凌广有 | Electronic teacher pointer |
| CN101071344A (en) * | 2006-05-12 | 2007-11-14 | 深圳市巨龙科教高技术股份有限公司 | Electronic pen for interactive electronic white board |
| US20100156831A1 (en) * | 2008-12-18 | 2010-06-24 | Dana Gene Doubrava | Dual Pen Interactive Whiteboard System |
| CN101539816A (en) * | 2009-04-16 | 2009-09-23 | 台均科技（深圳）有限公司 | Electromagnetic pen, electromagnetic signal transmitting method, processing method, device and equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102854460B (en) | 2014-12-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104115118A (en) | Gesture detection based on information from multiple types of sensors | |
| CN103294258A (en) | Hybrid touch screen device and method for operating the same | |
| CN101957683B (en) | Dual-mode input device and dual-mode input method | |
| US20210117022A1 (en) | Ultrasonic touch device and method, display device | |
| CN103605471A (en) | Single-hand control method and device and handheld device | |
| CN111124158A (en) | Information input equipment, terminal, control method thereof and chip | |
| CN103473011A (en) | Mobile terminal, and performance detecting method and performance detecting device for mobile terminal | |
| US20130070158A1 (en) | Touch input device and electronic device using the same | |
| CN107819922B (en) | A kind of relaying method of adjustment, wireless headset and the mobile terminal of wireless headset | |
| CN109240551A (en) | Use the method and Related product of gesture control electronic device | |
| CN103686464A (en) | Method and device for controlling equipment and electronic equipment | |
| CN102880339A (en) | Wireless touch remote control device and operation identification method thereof | |
| CN102478974B (en) | Electromagnetic pen for electronic whiteboard and control method thereof | |
| CN102929451A (en) | Intelligent whiteboard system using ultrasonic touch screen | |
| CN105335434B (en) | Log management method and device and electronic equipment | |
| CN102023753B (en) | A kind of proximity test device and electronic equipment | |
| CN105224074A (en) | A kind of control method and electronic equipment | |
| CN102854460B (en) | Key state detection method for electronic pointer, electronic white board and electronic pointer | |
| JP3551591B2 (en) | Pen input device | |
| US20140078119A1 (en) | Method for simulating key input using capacitive stylus, capacitive stylus and terminal | |
| CN104023256A (en) | Touch screen remote control unit | |
| CN101968689A (en) | Multimode mouse device | |
| CN201355487Y (en) | Multifunctional portable electronic menu | |
| CN102799330B (en) | Based on the sensor connecting circuit of electronic equipment and control method thereof and electronic equipment | |
| CN208110561U (en) | Intelligent touch induction system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |