CN207319201U - Active capacitance writing pencil based on USB communications - Google Patents
Active capacitance writing pencil based on USB communications Download PDFInfo
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- CN207319201U CN207319201U CN201721406291.XU CN201721406291U CN207319201U CN 207319201 U CN207319201 U CN 207319201U CN 201721406291 U CN201721406291 U CN 201721406291U CN 207319201 U CN207319201 U CN 207319201U
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- writing pencil
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- mirco
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Abstract
A kind of active capacitance writing pencil based on USB communications, include active capacitance writing pencil and mobile equipment, the active capacitance writing pencil is connected by mirco usb connections with mobile equipment to be communicated, and the mobile equipment is powered by mirco usb connections to active capacitance writing pencil.The active capacitance writing pencil based on USB communications of the utility model, it is ensured that after APP running softwares, there is the positioning accuracy of high input, make editor's document, drawing facilitate more freely.Secondly, communicated by USB, mobile equipment can know whether to be connected to supporting special writing pencil, can be effectively protected APP softwares rights and interests from encroaching on, play the purpose of software locks.
Description
Technical field
It the utility model is related to a kind of capacitance writing pencil.More particularly to a kind of active capacitance hand based on USB communications
Write pen.
Background technology
Mobile equipment is primarily referred to as the mobile phone and tablet computer of various brands, its display screen overwhelming majority all uses capacitance
Screen.Capacitance plate basic functional principle is：People is imaginary ground connection thing (zero potential body), leads to a upper very low electricity to working face
Pressure, when the user touches the screen, finger absorb the electric current of a very little, this electric current is respectively from four angles of touch-screen or four
Flowed out in electrode on bar side, and the electric current for flowing through this four electrodes in theory is proportional to the distance of finger to corner, control
Device processed draws the position of touch point, capacitance plate electrostatic induction needs conductor to connect by calculating the precision of this four current ratios
Touch screen curtain just has reaction, so need not exert oneself very much, as long as finger gently touches screen and can be identified.Therefore, commonly
Writing pencil can not be applicable in capacitance plate, and capacitance plate needs the writing pencil of special static electrification.
Capacitance writing pencil is divided into active and two kinds of capacitance writing pencils of passive-type.Their basic functional principle is：Passively
Type is that apish finger touches effect, and nib is conductive material (metal, conductive rubber, carbon fiber etc.), as long as nib is enough
Capacitance variations are influenced, so passive-type capacitance writing pencil has very thick nib；Due to the knot of passive-type capacitance writing pencil
Structure and technique prevent it from meeting to be accurately positioned requirement, therefore its application purpose is limited, such as when editor's document, it is difficult to
Accomplish accurately to click on the word and punctuation mark for needing to edit.Active capacitance writing pencil is provided with sensor, meeting inside handwriting
Signal in active probe capacitance plate, so as to send the signal of similar finger touch effect by nib；Active capacitance is hand-written
Pen couples a signal to the processing unit inside pen, therefore its nib can be very thin, just as the probe of oscillograph, from
And the positioning accuracy of input can be greatly improved, editor's document, drawing is facilitated more freely, expand capacitance writing pencil
Application purpose.
The content of the invention
Technical problem to be solved in the utility model is to provide a kind of active capacitance writing pencil based on USB communications.
Technical solution is used by the utility model：A kind of active capacitance writing pencil based on USB communications, includes
Active capacitance writing pencil and mobile equipment, the active capacitance writing pencil pass through mirco usb connections and mobile equipment
It is connected and is communicated, the mobile equipment is powered by mirco usb connections to active capacitance writing pencil.
The active capacitance writing pencil includes：The touch pen point that is sequentially connected in series, signal transducer, processor
Unit and tip of the brushstyle of a writing or painting mirco usb interfaces, the data signal output of the processor unit are also connected by output driving unit
The input terminal of the touch pen point, the tip of the brushstyle of a writing or painting mirco usb interfaces connect the mobile equipment by mirco usb order wires
Equipment end mirco usb interfaces, be additionally provided with power module, the power output end connection of the tip of the brushstyle of a writing or painting mirco usb interfaces
The power input of the power module, the power output end of the power module connect the processor unit, output respectively
The power input of driving unit, signal transducer and tip of the brushstyle of a writing or painting mirco usb interfaces.
The tip of the brushstyle of a writing or painting mirco usb interfaces include usb modular converters and mirco usb plugs are formed, described
The data-signal input/output terminal of mirco usb connections connects usb by the data signal end of the mirco usb plugs
The data-signal input/output terminal of modular converter, the power output end of the mirco usb connections pass through the mirco usb
The power end of plug connects the power input of the power module, and the power end of the mirco usb plugs also passes through
First capacity earth, the data-signal input/output terminal of the usb modular converters connect the data-signal of the processor unit
Input/output terminal, the power input of the usb modular converters connect the 3.3V power output ends of the power module, and the end is also
Pass through the second capacity earth.
The signal transducer includes operational amplifier and pressure sensor, the positive input of the operational amplifier
End connects one end of first resistor, pressure sensor and the 5th resistance, the reverse input end difference of the operational amplifier respectively
One end of second resistance, 3rd resistor and the 4th resistance is connected, the first resistor connects power supply with the other end of second resistance
The 3.3V power output ends of module, the other end ground connection of the pressure sensor, 3rd resistor and the 5th resistance, the 4th electricity
The output terminal of the other end concatenation operation amplifier of resistance, the data letter of the output terminal connection processing device unit of the operational amplifier
Number input terminal, the operational amplifier power end connection power module 3.3V power output ends.
The processor unit includes microprocessor, and the control output end connection output of the microprocessor is driven
The input terminal of moving cell, the data-signal input/output terminal of the microprocessor connect the number of the tip of the brushstyle of a writing or painting mirco usb interfaces
According to signal input output end, the reset terminal of the microprocessor is defeated by the 3.3V power supplys of the 6th resistance connection power module
Outlet.
It is additionally provided with the 3rd capacitance, the 4th capacitance and the crystal oscillator that clock circuit is formed with the microprocessor, micro- place
The crystal oscillator output terminal for managing device is described micro- by the 4th capacity earth by the 3rd capacity earth, the crystal oscillator input terminal of microprocessor
The crystal oscillator is connected between the crystal oscillator output terminal and crystal oscillator input terminal of processor.
The active capacitance writing pencil based on USB communications of the utility model, it is ensured that after APP running softwares, there is height
Input positioning accuracy, make editor's document, drawing facilitate more freely.Secondly, communicated by USB, mobile equipment can obtain
Know whether be connected to supporting special writing pencil, APP softwares rights and interests can be effectively protected from encroaching on, play the mesh of software locks
's.
Brief description of the drawings
Fig. 1 is schematic diagram of the utility model based on USB active the capacitance writing pencils and mobile device communication communicated；
Fig. 2 is the circuit block diagram of the active capacitance writing pencil based on USB communications in the utility model；
Fig. 3 is the circuit diagram of tip of the brushstyle of a writing or painting mirco usb interfaces in the utility model；
Fig. 4 is the circuit diagram of signal transducer in the utility model；
Fig. 5 is the circuit diagram of processor unit in the utility model.
Embodiment
The active capacitance writing pencil based on USB communications of the utility model is made in detail with reference to embodiment and attached drawing
Describe in detail bright.
As shown in Figure 1, the active capacitance writing pencil based on USB communications of the utility model, includes active capacitance
Writing pencil 1 and mobile equipment 2, the active capacitance writing pencil 1 are connected by mirco usb connections 17 with mobile equipment 2
Communicated, the mobile equipment 2 is powered by mirco usb connections 17 to active capacitance writing pencil 1.
As shown in Fig. 2, the active capacitance writing pencil 1 includes：The touch pen point 11 that is sequentially connected in series, signal
Sensor 12, processor unit 13 and tip of the brushstyle of a writing or painting mirco usb interfaces 15, the data signal output of the processor unit 13 is also
The input terminal of the touch pen point 11 is connected by output driving unit 14, the tip of the brushstyle of a writing or painting mirco usb interfaces 15 pass through mirco
Usb order wires 17 connect the equipment end mirco usb interfaces 21 of the mobile equipment 2, are additionally provided with power module 16, the pen
The power output end of mirco usb interfaces 15 is held to connect the power input of the power module 16, the power module 16
Power output end connects the processor unit 13, output driving unit 14, signal transducer 12 and tip of the brushstyle of a writing or painting mirco usb respectively
The power input of interface 15.
Patched as shown in figure 3, the tip of the brushstyle of a writing or painting mirco usb interfaces 15 include usb modular converter U2 and mirco usb
Head P1 is formed, and the data-signal input/output terminal of the mirco usb connections 17 passes through the mirco usb plugs P1's
The data-signal input/output terminal of data signal end D+, D- connection usb modular converters U2, the mirco usb connections 17
The power input for the power end V connections power module 16 that power output end passes through the mirco usb plugs P1, institute
The power end V for stating mirco usb plugs P1 is also grounded by the first capacitance C1, the data-signal of the usb modular converters U2
Input/output terminal TX, RX connect data-signal input/output terminal TX, RX of the processor unit 13, the usb modular converters
The power input of U2 connects the 3.3V power output ends of the power module 16, which is also grounded by the second capacitance C2.This
In embodiment, the usb modular converters U2 uses the chip of model CH340E.
In the example of the utility model, the course of work of the active capacitance writing pencil based on USB communications is that movement is set
Application software app is run on standby 2, application software app sends request identification code order, order to active capacitance writing pencil 1
Information reaches D+, D- of the plug of the mirco usb interfaces 15 of active capacitance writing pencil 1 by mirco usb lines 17
End, D+, D- end of plug are connected with D+, D- end of usb modular converters U2, and command information is changed by usb modular converters U2
Into serial communication command, the RX ends of the microprocessor U1 of processor unit 13 are transmitted to, microprocessor U1 is connected to request identification code
After order, itself identification code will be stored in by its TX end and is sent to the RX of usb modular converters U2 in mirco usb interfaces 15
End, changes by the signal of usb modular converters U2, D+, D- end of 15 plug of mirco usb interfaces is sent to, by mirco
Usb lines 17, the identification code of active capacitance writing pencil 1 have been transferred to mobile equipment 2, have moved the application software app in equipment 2
Receive the identification code of active capacitance writing pencil 1, it is known that mobile equipment 2 has connected supporting active capacitance hand
Write pen 1.If after application software app sends request identification code order to active capacitance writing pencil 1, do not receive corresponding
The identification code of active capacitance writing pencil 1, moves the application software app in equipment 2 and has been known that mobile equipment 2 without in connection
Active capacitance writing pencil 1.So far, mobile equipment 2 has been reached and has been aware of whether active capacitance writing pencil 1 is connected to movement
The purpose of equipment 2.
As shown in figure 4, the signal transducer 12 includes operational amplifier OP and pressure sensor SR, the computing
The positive input of amplifier OP connects one end of first resistor R1, pressure sensor SR and the 5th resistance R5, the fortune respectively
The reverse input end for calculating amplifier OP connects one end of second resistance R2,3rd resistor R3 and the 4th resistance R4 respectively, and described the
One resistance R1 connects the 3.3V power output ends of power module 16 with the other end of second resistance R2, the pressure sensor SR,
The other end of 3rd resistor R3 and the 5th resistance R5 are grounded, and the other end concatenation operation amplifier OP's of the 4th resistance R4 is defeated
Outlet, the input terminal ADC1 of the data-signal of the output terminal connection processing device unit 13 of the operational amplifier OP, the computing
The 3.3V power output ends of the power end connection power module 16 of amplifier OP.
Operational amplifier OP described in the present embodiment uses the operational amplifier of model LM358.
As shown in figure 5, the processor unit 13 includes the control output of microprocessor U1, the microprocessor U1
OUT0, OUT1 is held to connect the input terminal of the output driving unit 14, the data-signal input/output terminal of the microprocessor U1
TX, RX connect data-signal input/output terminal TX, RX of the tip of the brushstyle of a writing or painting mirco usb interfaces 15, and the microprocessor U1's answers
The 3.3V power output ends that position end RST passes through the 6th resistance R6 connections power module 16.It is additionally provided with and the microprocessor
Device U1 forms the 3rd capacitance C3, the 4th capacitance C4 and the crystal oscillator Y of clock circuit, the crystal oscillator output terminal XOUT of the microprocessor U1
It is grounded by the 3rd capacitance C3, the crystal oscillator input terminal Xin of microprocessor U1 is grounded by the 4th capacitance C4, the microprocessor U1
Crystal oscillator output terminal XOUT and crystal oscillator input terminal Xin between connect the crystal oscillator Y.
Microprocessor 13 described in the present embodiment uses the processor of model MSP430F2112.
The active capacitance writing pencil based on USB communications of the utility model, is active capacitance writing pencil and movement
Equipment is connected by Micro USB line interfaces, and the APP softwares run in mobile equipment communicate behaviour by USB and read actively
Identification code in formula capacitance writing pencil, if the read out identification code be prefabricated and supporting active capacitance writing pencil identification code,
What the APP softwares run in mobile equipment will perceive its connection is supporting active capacitance writing pencil, and then movement is set
The APP softwares of standby upper operation can enable corresponding software function.The APP softwares run in mobile equipment, it is hand-written to capacitance
Pen has certain requirement, such as：The elasticity of nib size, nib, smoothness of handwriting input etc., it is directly related to APP
Application effect after running software.Secondly, have USB communications, it can be seen that mobile equipment whether be connected to it is supporting special
With writing pencil, APP softwares rights and interests can be effectively protected from encroaching on, play the purpose of software locks.
The operation principle of active capacitance writing pencil based on USB communications of the utility model is：When people use actively
Type capacitance writing pencil 1 when being write or being painted on the capacitance plate of mobile equipment 2, after touching capacitance plate produce by touch pen point 11
Give birth to pressure to be coupled by the signal transducer 12 being connected with it with electric field signal, processor unit 13 constantly gathers signal
The signal of sensor 12, when collecting the signal that signal transducer 12 is coupled to, just carries out calculating processing, afterwards, output
For corresponding drive signal to the input terminal of output driving unit 14, output driving unit 14 passes through touch pen point after signal is adjusted
11 are output to capacitance plate, to change the capacitance of this point of capacitance plate, realize the functions such as writing, drawing.Main the utility model
The identification of active capacitance writing pencil based on USB communications is realized：Mobile equipment 2 is connected by mirco usb communication cables 17
It is connected on tip of the brushstyle of a writing or painting mirco usb interfaces 15, the app softwares run in mobile equipment 2 are to the active capacitance hand communicated based on USB
Write pen 1 and send request identification code order, the processor unit 13 of the active capacitance writing pencil 1 based on USB communications passes through mirco
After usb interfaces 15 receive the request identification code order from mobile equipment 2, returned by mirco usb interfaces 15 to mobile equipment 2
Telegram in reply holds the identification code of writing pencil, after the app softwares of mobile equipment 2 receive the identification code of capacitance writing pencil, learns mobile equipment 2
Supporting capacitance writing pencil has been connected, other software functions can be continued to run with.Active capacitance based on USB communications
The power supply of writing pencil 1 is to be obtained by mirco usb interfaces 15 from mobile equipment 2, and the input terminal of power module 16 is connected to
Mirco usb interfaces 15, so as to obtain input power, after power module 16 changes voltage stabilizing, export to processor unit 13, defeated
Go out driving unit 14, signal transducer 12 and mirco usb interfaces 15 to provide operating voltage.To sum up described in operation principle, lead to
Cross mirco usb connections 17 so that communication of the USB communications between mobile equipment 2 and active capacitance writing pencil 1 is able to reality
Existing, mobile equipment 2 can not only obtain the identification code of active capacitance writing pencil 1, but also can be that active capacitance writing pencil 1 supplies
Electricity.
Claims (6)
1. a kind of active capacitance writing pencil based on USB communications, it is characterised in that include active capacitance writing pencil (1)
With mobile equipment (2), the active capacitance writing pencil (1) is connected by mirco usb connections (17) with mobile equipment (2)
Communicated, the mobile equipment (2) is powered by mirco usb connections (17) to active capacitance writing pencil (1).
2. the active capacitance writing pencil according to claim 1 based on USB communications, it is characterised in that the active
Type capacitance writing pencil (1) includes：The touch pen point (11) that is sequentially connected in series, signal transducer (12), processor unit
(13) and tip of the brushstyle of a writing or painting mirco usb interfaces (15), the data signal output of the processor unit (13) also pass through output driving
Unit (14) connects the input terminal of the touch pen point (11), and the tip of the brushstyle of a writing or painting mirco usb interfaces (15) are led to by mirco usb
The equipment end mirco usb interfaces (21) that line (17) connects the mobile equipment (2) are interrogated, are additionally provided with power module (16), institute
The power output end for stating tip of the brushstyle of a writing or painting mirco usb interfaces (15) connects the power input of the power module (16), the power supply
The power output end of module (16) connects the processor unit (13), output driving unit (14), signal transducer respectively
(12) and tip of the brushstyle of a writing or painting mirco usb interfaces (15) power input.
3. the active capacitance writing pencil according to claim 2 based on USB communications, it is characterised in that the tip of the brushstyle of a writing or painting
Mirco usb interfaces (15) include usb modular converters (U2) and mirco usb plugs (P1) are formed, the mirco usb
The data signal end (D+, D-) that the data-signal input/output terminal of connection (17) passes through the mirco usb plugs (P1)
The data-signal input/output terminal of usb modular converters (U2) is connected, the power output end of the mirco usb connections (17) leads to
The power end (V) for crossing the mirco usb plugs (P1) connects the power input of the power module (16), described
The power end (V) of mirco usb plugs (P1) is also grounded by the first capacitance (C1), the number of the usb modular converters (U2)
The data-signal input/output terminal (TX, RX) of the processor unit (13) is connected according to signal input output end (TX, RX), it is described
The power inputs of usb modular converters (U2) connects the 3.3V power output ends of the power module (16), and the end is also by the
Two capacitances (C2) are grounded.
4. the active capacitance writing pencil according to claim 2 based on USB communications, it is characterised in that the signal
Sensor (12) includes operational amplifier (OP) and pressure sensor (SR), the positive input of the operational amplifier (OP)
One end of first resistor (R1), pressure sensor (SR) and the 5th resistance (R5) is connected respectively, the operational amplifier (OP)
Reverse input end connects one end of second resistance (R2), 3rd resistor (R3) and the 4th resistance (R4), the first resistor respectively
(R1) the 3.3V power output ends of power module (16), the pressure sensor are connected with the other end of second resistance (R2)
(SR), the other end of 3rd resistor (R3) and the 5th resistance (R5) is grounded, the other end concatenation operation of the 4th resistance (R4)
The output terminal of amplifier (OP), the data-signal of the output terminal connection processing device unit (13) of the operational amplifier (OP) it is defeated
Enter end (ADC1), the 3.3V power output ends of the power end connection power module (16) of the operational amplifier (OP).
5. the active capacitance writing pencil according to claim 2 based on USB communications, it is characterised in that the processing
Device unit (13) includes microprocessor (U1), described in control output end (the OUT0, OUT1) connection of the microprocessor (U1)
The input terminal of output driving unit (14), the microprocessor (U1) data-signal input/output terminal (TX, RX) connection described in
The data-signal input/output terminal (TX, RX) of tip of the brushstyle of a writing or painting mirco usb interfaces (15), the reset terminal of the microprocessor (U1)
(RST) the 3.3V power output ends of the power module (16) are connected by the 6th resistance (R6).
6. it is according to claim 5 based on USB communication active capacitance writing pencil, it is characterised in that be additionally provided with
The microprocessor (U1) forms the 3rd capacitance (C3), the 4th capacitance (C4) and the crystal oscillator (Y) of clock circuit, the microprocessor
(U1) crystal oscillator output terminal (XOUT) is grounded by the 3rd capacitance (C3), and the crystal oscillator input terminal (Xin) of microprocessor (U1) passes through
4th capacitance (C4) is grounded, and is connected between the crystal oscillator output terminal (XOUT) and crystal oscillator input terminal (Xin) of the microprocessor (U1)
The crystal oscillator (Y).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721406291.XU CN207319201U (en) | 2017-10-26 | 2017-10-26 | Active capacitance writing pencil based on USB communications |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721406291.XU CN207319201U (en) | 2017-10-26 | 2017-10-26 | Active capacitance writing pencil based on USB communications |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207319201U true CN207319201U (en) | 2018-05-04 |
Family
ID=62379743
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721406291.XU Expired - Fee Related CN207319201U (en) | 2017-10-26 | 2017-10-26 | Active capacitance writing pencil based on USB communications |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207319201U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109471830A (en) * | 2018-11-08 | 2019-03-15 | 徐州生波网络科技有限公司 | Teaching development external member based on Arduino |
-
2017
- 2017-10-26 CN CN201721406291.XU patent/CN207319201U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109471830A (en) * | 2018-11-08 | 2019-03-15 | 徐州生波网络科技有限公司 | Teaching development external member based on Arduino |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180504 Termination date: 20181026 |
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| CF01 | Termination of patent right due to non-payment of annual fee |