CN112732073B - Digital pen - Google Patents
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- CN112732073B CN112732073B CN202011587651.7A CN202011587651A CN112732073B CN 112732073 B CN112732073 B CN 112732073B CN 202011587651 A CN202011587651 A CN 202011587651A CN 112732073 B CN112732073 B CN 112732073B
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- holding position
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- position information
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- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/033—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor
- G06F3/0354—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor with detection of 2D relative movements between the device, or an operating part thereof, and a plane or surface, e.g. 2D mice, trackballs, pens or pucks
- G06F3/03545—Pens or stylus
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- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/016—Input arrangements with force or tactile feedback as computer generated output to the user
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/18—Status alarms
- G08B21/24—Reminder alarms, e.g. anti-loss alarms
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B5/00—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied
- G08B5/22—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission
- G08B5/36—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission using visible light sources
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Human Computer Interaction (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Electromagnetism (AREA)
- Position Input By Displaying (AREA)
Abstract
The invention provides a digital pen, belonging to the technical field of intelligent pens, the digital pen provided by the invention comprises: the digital pen comprises a holding position detection sensor, a digital pen body and a holding position information transmission circuit; the holding position detection sensor is arranged on the digital pen body; the holding position detection sensor is connected with the holding position information transmission circuit and used for detecting holding position information generated on the digital pen body when a user holds the pen and sending the holding position information to an upper computer through the holding position information transmission circuit; according to the invention, the holding position information generated on the digital pen body when a user holds the pen is detected in real time through the holding position detection sensor, and the holding position information is sent to the upper computer, so that the upper computer can correct the pen holding position of the user according to the holding position information, the user is reminded of the pen holding posture in real time, and the myopia or humpback phenomenon caused by the improper pen holding distance of the user is avoided.
Description
Technical Field
The invention belongs to the technical field of intelligent pens, and particularly relates to a digital pen.
Background
The intelligent pen can record the writing track in a digital mode while writing on paper so as to perform subsequent automatic analysis and processing, and is widely applied to the field of education at present. Common smart pens include electromagnetic touch pens, capacitive touch pens, dot matrix pens, and the like.
The correct pen holding posture is that the nail root of the finger of the hand supports the pen from bottom to top from the lower part of the pen holder when the pen is held, and a distance of one inch is left between the pen holding fingers and the lowest part of the pen holder, wherein one inch is about 33 mm.
The pen holding distance of the child is controlled to be 33 mm, so that the child can see the characters of the book clearly, and the writing comfort of the child can be guaranteed.
The current intelligence pen is not equipped with and holds a correction function, when holding a distance improper, produces following problem easily:
1. if the pen is held too close for a long time, the pen point is easily invisible for children and the children can write only by tilting the neck, so that the vision and the development of the spine are affected, and myopia or humpback can be caused in the past.
2. If the distance between the pen and the child is too far, the child cannot clearly see the written characters, and only has to lie on the stomach to see in order to enlarge the visual field range of the child, so that the child bends over and bends over the hunchback, the closer the distance between the child and the child is, the more tense the adjustment of eyes is, and the myopia can be formed after the child is held for a long time.
Disclosure of Invention
The invention aims to provide a digital pen, and aims to solve the problem that the pen holding distance is not appropriate when people hold a pen because the existing intelligent pen is not provided with a pen holding correction function.
In order to realize the purpose, the invention adopts the technical scheme that: a digital pen, comprising: the digital pen comprises a holding position detection sensor, a digital pen body and a holding position information transmission circuit;
the holding position detection sensor is arranged on the digital pen body; the holding position detection sensor is connected with the holding position information transmission circuit and used for detecting holding position information generated on the digital pen body when a user holds a pen and sending the holding position information to the upper computer through the holding position information transmission circuit, and the upper computer corrects the pen holding posture of a pen holder according to the holding position information; the holding position information comprises upper holding position information, lower holding position information and middle holding position information.
Preferably, the grip position detection sensor comprises an upper grip position detection ring, an upper grip position detection sensor, a lower grip position detection ring and a lower grip position detection sensor;
the upper grip position detection ring and the lower grip position detection ring are sleeved on the digital pen body; a gap is arranged between the upper holding position detection ring and the lower holding position detection ring;
the upper holding position detection ring is connected with the upper holding position detection sensor, and the lower holding position detection ring is connected with the lower holding position detection sensor;
when a user touches the upper holding position detection ring when holding a pen, the upper holding position detection sensor outputs a low level which is recorded as upper holding position information;
when a user touches the lower holding position detection ring when holding a pen, the lower holding position detection sensor outputs a low level which is recorded as lower holding position information;
when a user holds the pen, the upper holding position detection ring and the lower holding position detection ring are not contacted, and the upper holding position detection sensor and the lower holding position detection sensor can simultaneously output high level and record as middle holding position information.
Preferably, GT3LS01L is used as each of the grip position detecting sensor and the grip position detecting sensor.
Preferably, the LED lamp also comprises an upper holding position LED lamp and a lower holding position LED lamp;
the output end of the upper holding position detection sensor is connected with the upper holding position LED lamp, and when the output end of the upper holding position detection sensor outputs a low level, the upper holding position LED lamp is conducted to emit light;
the output end of the lower holding position detection sensor is connected with the lower holding position LED lamp, and when the output end of the lower holding position detection sensor outputs a low level, the lower holding position LED lamp is conducted to emit light.
Preferably, the holding bit information transmission circuit comprises an operational amplifier feedback circuit and an oscillating circuit;
the operational amplifier feedback circuit is connected with the oscillating circuit and used for receiving the holding position information and sending the holding position information to the oscillating circuit; the oscillation circuit generates holding oscillation frequency according to the holding information, so that the holding information is transmitted to an upper computer.
Preferably, the operational amplifier feedback circuit includes: the first field effect transistor, the second field effect transistor, the third field effect transistor, the fourth field effect transistor, the twentieth capacitor, the thirteenth capacitor, the twenty-fourth capacitor, the twenty-fifth capacitor, the twenty-sixth capacitor and the triode;
the grid electrode of the first field effect transistor is connected with the output end of the lower holding position detection sensor, the source electrode of the first field effect transistor is connected with a power supply, and the drain electrode of the first field effect transistor is connected with the grid electrode of the third field effect transistor; a source electrode of the third field effect transistor is connected with one end of the twenty-fifth capacitor, the other end of the twenty-fifth capacitor is grounded, a drain electrode of the third field effect transistor is connected with one end of the twentieth capacitor, and the other end of the twentieth capacitor is connected with a collector electrode of the triode;
the grid electrode of the second field effect tube is connected with the output end of the upper holding position detection sensor, the source electrode of the second field effect tube is connected with the power supply, and the drain electrode of the second field effect tube is connected with the grid electrode of the fourth field effect tube; a source electrode of the fourth field effect transistor is connected with one end of the twenty-fifth capacitor, a drain electrode of the fourth field effect transistor is connected with one end of the thirteenth capacitor, and the other end of the thirteenth capacitor is connected with a collector electrode of the triode;
one end of the twenty-fourth capacitor is connected with the collector of the triode, and the other end of the twenty-fourth capacitor is connected with one end of the twenty-fifth capacitor;
an emitting electrode of the triode is connected with one end of the twenty-fifth capacitor, and a base electrode of the triode is connected with a power supply; one end of the twenty-sixth capacitor is connected with the base electrode of the triode, and the other end of the twenty-sixth capacitor is grounded.
Preferably, the oscillator circuit includes: the inductor, the second capacitor, the sixteenth capacitor and the seventeenth capacitor;
one end of the inductor is connected with one end of the second capacitor, and the other end of the inductor is connected with the other end of the second capacitor; one end of the second capacitor is connected with one end of the sixteenth capacitor, and the other end of the second capacitor is connected with the other end of the sixteenth capacitor; one end of the sixteenth capacitor is connected with one end of the seventeenth capacitor, the other end of the sixteenth capacitor is connected with the other end of the seventeenth capacitor, and the other end of the seventeenth capacitor is connected with the collector electrode of the triode.
Preferably, the circuit further comprises a first capacitor, a third capacitor, a second switch and a third switch;
one end of the first capacitor is connected with one end of the third switch, the other end of the first capacitor is connected with one end of the seventeenth capacitor, and the other end of the third switch is connected with the other end of the seventeenth capacitor;
one end of the third capacitor is connected with one end of the second switch, the other end of the third capacitor is connected with the other end of the first capacitor, and the other end of the second switch is connected with the other end of the third switch.
The digital pen provided by the invention has the beneficial effects that: compared with the prior art, the digital pen provided by the invention comprises: the digital pen comprises a holding position detection sensor, a digital pen body and a holding position information transmission circuit; the holding position detection sensor is arranged on the digital pen body; the holding position detection sensor is connected with the holding position information transmission circuit and used for detecting holding position information generated on the digital pen body when a user holds the pen and sending the holding position information to an upper computer through the holding position information transmission circuit; according to the invention, the holding position information generated on the digital pen body when a user holds the pen is detected in real time through the holding position detection sensor, and the holding position information is sent to the upper computer, so that the upper computer can correct the pen holding position of the user according to the holding position information, the user is reminded of the pen holding posture in real time, and the myopia or humpback phenomenon caused by the improper pen holding distance of the user is avoided.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a digital pen according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a grip detection sensor according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a handshake detection sensor according to an embodiment of the present invention;
fig. 4 is a schematic diagram of an LED lamp prompt circuit provided in an embodiment of the present invention;
FIG. 5 is a circuit diagram of a handshake information transfer circuit according to an embodiment of the present invention;
in the figure:
1. a digital pen body; 2. an upper holding position detection ring; 3. and a lower holding position detection ring.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, a digital pen according to the present invention will now be described. A digital pen, comprising: the digital pen comprises a holding position detection sensor, a digital pen body 1 and a holding position information transmission circuit;
the holding position detection sensor is arranged on the digital pen body 1; the holding position detection sensor is connected with the holding position information transmission circuit and used for detecting holding position information generated on the digital pen body 1 when a user holds a pen and sending the holding position information to the upper computer through the holding position information transmission circuit, and the upper computer corrects the pen holding posture of a pen holder according to the holding position information; the handshake information includes upper handshake information, lower handshake information, and middle handshake information.
The grip position detection sensor comprises an upper grip position detection ring 2, an upper grip position detection sensor, a lower grip position detection ring 3 and a lower grip position detection sensor;
the upper holding position detection ring 2 and the lower holding position detection ring 3 are sleeved on the digital pen body 1; a gap is arranged between the upper holding position detection ring 2 and the lower holding position detection ring 3;
the upper holding position detection ring 2 is connected with an upper holding position detection sensor, and the lower holding position detection ring 3 is connected with a lower holding position detection sensor;
when a user touches the upper holding position detection ring 2 when holding the pen, the upper holding position detection sensor outputs a low level which is recorded as upper holding position information;
when a user touches the lower holding position detection ring 3 when holding the pen, the lower holding position detection sensor outputs a low level which is recorded as lower holding position information;
when the user holds the pen, the upper grip detection ring 2 and the lower grip detection ring 3 are not touched, and the upper grip detection sensor and the lower grip detection sensor output high level at the same time and record as middle grip information.
Both the upper grip position detection sensor and the lower grip position detection sensor adopt GT3LS 01L.
In practical application, the upper grip position detection ring 2 or the lower grip position detection ring 3 is an annular metal pad, and the finger position is detected by using a capacitance detection mode. The annular metal pad can be a metal conductive material sprayed or electroplated on the pen shell, and can also be made of a flexible printed circuit board. The diameter of the upper grip position detection ring 2 or the lower grip position detection ring 3 is preferably 7.5mm, the width thereof is preferably 1.16mm, the height h1 of the upper grip position detection ring 2 from the pen tip is 30.3mm, and the height h2 of the lower grip position detection ring 3 from the pen tip is 23.75 mm.
Referring to fig. 2 and 3 together, GT3LS01L is used to detect the position of a finger touch, GT3LS01L is based on the principle that the initial capacitance of a metal pad to ground is Ci, and when the finger approaches, a capacitor Cp is connected in parallel between the pad and ground, and when the Cp capacitance is large enough, the output of GT3LS01L will generate a low level.
According to the invention, the holding position information generated on the digital pen body 1 when a user holds a pen is detected in real time through the holding position detection sensor, and the holding position information is sent to the upper computer, so that the upper computer can correct the pen holding position of the user according to the holding position information, the user is reminded of paying attention to the pen holding posture in real time, and the phenomenon of myopia or humpback caused by improper pen holding distance of the user is avoided.
Referring to fig. 4, the present invention further includes an upper holding position LED lamp and a lower holding position LED lamp;
the output end of the upper holding position detection sensor is connected with the upper holding position LED lamp, and when the output end of the upper holding position detection sensor outputs a low level, the upper holding position LED lamp is conducted to emit light;
the output end of the lower holding position detection sensor is connected with the lower holding position LED lamp, and when the output end of the lower holding position detection sensor outputs a low level, the lower holding position LED lamp is conducted to emit light.
The pen holding device can remind a user of the pen holding condition through the light emitting condition of the LED lamp.
In the electromagnetic touch application, the education handwriting pad can be connected to a server or a cloud in a wireless mode, such as bluetooth, WIFI, 4G, and the like, and the track written by the user is transmitted out, so that a teacher, the server, and the like can store, analyze, or perform other processing. Therefore, the holding position information of the pen holding can be transmitted additionally, the monitoring of the pen holding condition of the user is facilitated, and the pen holding condition can be pointed out and corrected in time. Not only through interface indication such as LED lamps to remind the user.
Referring to fig. 5, the handshake information transfer circuit according to the present invention will be further described.
The holding position information transmission circuit comprises an operational amplifier feedback circuit and an oscillating circuit;
the operational amplifier feedback circuit is connected with the oscillating circuit and used for receiving the holding bit information and sending the holding bit information to the oscillating circuit; the oscillation circuit generates a holding oscillation frequency according to the holding information, so that the holding information is transmitted to the upper computer.
The operational amplifier feedback circuit includes: a first field effect transistor P4, a second field effect transistor P2, a third field effect transistor N2, a fourth field effect transistor N3, a twentieth capacitor C20, a thirteenth capacitor C13, a twenty-fourth capacitor C24, a twenty-fifth capacitor C25, a twenty-sixth capacitor C26 and a triode;
the grid electrode of the first field effect transistor P4 is connected with the output end of the lower holding position detection sensor, the source electrode of the first field effect transistor P4 is connected with a power supply, and the drain electrode of the first field effect transistor P4 is connected with the grid electrode of the third field effect transistor N2; the source electrode of the third field effect transistor N2 is connected with one end of a twenty-fifth capacitor C25, the other end of the twenty-fifth capacitor C25 is grounded, the drain electrode of the third field effect transistor N2 is connected with one end of a twentieth capacitor C20, and the other end of the twentieth capacitor C20 is connected with the collector electrode of the triode;
the grid electrode of the second field effect transistor P2 is connected with the output end of the upper holding position detection sensor, the source electrode of the second field effect transistor P2 is connected with a power supply, and the drain electrode of the second field effect transistor P2 is connected with the grid electrode of the fourth field effect transistor N3; a source electrode of the fourth field effect transistor N3 is connected with one end of a twenty-fifth capacitor C25, a drain electrode of the fourth field effect transistor N3 is connected with one end of a thirteenth capacitor C13, and the other end of the thirteenth capacitor C13 is connected with a collector electrode of the triode;
one end of a twenty-fourth capacitor C24 is connected with the collector of the triode, and the other end of the twenty-fourth capacitor C24 is connected with one end of a twenty-fifth capacitor C25;
an emitting electrode of the triode is connected with one end of a twenty-fifth capacitor C25, and a base electrode of the triode is connected with a power supply; one end of a twenty-sixth capacitor C26 is connected with the base of the triode, and the other end of the twenty-sixth capacitor C26 is grounded.
The oscillation circuit includes: an inductor L1, a second capacitor C2, a sixteenth capacitor C16 and a seventeenth capacitor C17;
one end of the inductor L1 is connected with one end of the second capacitor C2, and the other end of the inductor L1 is connected with the other end of the second capacitor C2; one end of the second capacitor C2 is connected to one end of the sixteenth capacitor C16, and the other end of the second capacitor C2 is connected to the other end of the sixteenth capacitor C16; one end of a sixteenth capacitor C16 is connected to one end of a seventeenth capacitor C17, the other end of the sixteenth capacitor C16 is connected to the other end of the seventeenth capacitor C17, and the other end of the seventeenth capacitor C17 is connected to the collector of the triode. The oscillator circuit further comprises a first capacitor C1, a third capacitor C3, a second switch J2 and a third switch J3;
one end of the first capacitor C1 is connected to one end of the third switch J3, the other end of the first capacitor C1 is connected to one end of the seventeenth capacitor C17, and the other end of the third switch J3 is connected to the other end of the seventeenth capacitor C17;
one end of the third capacitor C3 is connected to one end of the second switch J2, the other end of the third capacitor C3 is connected to the other end of the first capacitor C1, and the other end of the second switch J2 is connected to the other end of the third switch J3.
The holding position information transmission circuit omits a power tubeA main part in the oscillating circuit, the oscillating frequency is
L is inductance value, C is C2, C16 and C17 which are connected in parallel, then are connected in parallel with partial capacitors C20, C13 and C24 of the operational amplifier feedback circuit, and then are connected in series with C25, wherein the calculation formula of C is as follows;
when the digital pen normally works, the pen point is pressed down, the inductance value is increased, the oscillation frequency is descended, the switches J2 and J3 are switch keys on the pen, and after the switches are switched on, the oscillation frequency is also changed downwards, but the switches are different from the frequency range of the inductance value change, so the pressure of the keys and the pen point can be judged according to the oscillation frequency.
In order to detect the information of the handshake bit, a PMOS tube is introduced to control the connection and disconnection of C20/C13, under the normal condition, C20/C13 is in a connection state, but when the handshake bit is detected, namely OUT _1 becomes low, C20 is disconnected, the oscillation frequency of the whole pen is increased by a value f1, when the handshake bit is detected, namely OUT _2 becomes low, C13 is disconnected, the oscillation frequency of the pen is increased by another value f2, whether the handshake bit is in a normal position can be judged according to the detected frequency change, and therefore the handshake bit information is transmitted through a wireless module on a board.
According to the invention, the holding position information generated on the digital pen body when the user holds the pen is detected in real time through the holding position detection sensor, and the holding position information is sent to the upper computer, so that the upper computer can correct the pen holding position of the user according to the holding position information, the user is reminded of paying attention to the pen holding posture in real time, and the phenomenon of myopia or humpback caused by improper pen holding distance of the user is avoided.
The above description is intended to be illustrative of the preferred embodiment of the present invention and should not be taken as limiting the invention, but rather, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.
Claims (4)
1. A digital pen, comprising: the digital pen comprises a holding position detection sensor, a digital pen body and a holding position information transmission circuit;
the holding position detection sensor is arranged on the digital pen body; the holding position detection sensor is connected with the holding position information transmission circuit and used for detecting holding position information generated on the digital pen body when a user holds a pen and sending the holding position information to the upper computer through the holding position information transmission circuit, and the upper computer corrects the pen holding posture of a pen holder according to the holding position information; the holding position information comprises upper holding position information, lower holding position information and middle holding position information;
the holding position information transmission circuit comprises an operational amplifier feedback circuit and an oscillating circuit;
the operational amplifier feedback circuit is connected with the oscillating circuit and used for receiving the holding position information and sending the holding position information to the oscillating circuit; the oscillation circuit generates a holding oscillation frequency according to the holding information, so that the holding information is transmitted to an upper computer;
the operational amplifier feedback circuit includes: the first field effect transistor, the second field effect transistor, the third field effect transistor, the fourth field effect transistor, the twentieth capacitor, the thirteenth capacitor, the twenty-fourth capacitor, the twenty-fifth capacitor, the twenty-sixth capacitor and the triode;
the grid electrode of the first field effect tube is connected with the output end of the lower holding position detection sensor, the source electrode of the first field effect tube is connected with the power supply, and the drain electrode of the first field effect tube is connected with the grid electrode of the third field effect tube; a source electrode of the third field effect transistor is connected with one end of the twenty-fifth capacitor, the other end of the twenty-fifth capacitor is grounded, a drain electrode of the third field effect transistor is connected with one end of the twentieth capacitor, and the other end of the twentieth capacitor is connected with a collector electrode of the triode;
the grid electrode of the second field effect tube is connected with the output end of the upper holding position detection sensor, the source electrode of the second field effect tube is connected with the power supply, and the drain electrode of the second field effect tube is connected with the grid electrode of the fourth field effect tube; a source electrode of the fourth field effect transistor is connected with one end of the twenty-fifth capacitor, a drain electrode of the fourth field effect transistor is connected with one end of the thirteenth capacitor, and the other end of the thirteenth capacitor is connected with a collector electrode of the triode;
one end of the twenty-fourth capacitor is connected with the collector of the triode, and the other end of the twenty-fourth capacitor is connected with one end of the twenty-fifth capacitor;
an emitting electrode of the triode is connected with one end of the twenty-fifth capacitor, and a base electrode of the triode is connected with a power supply; one end of the twenty-sixth capacitor is connected with the base electrode of the triode, and the other end of the twenty-sixth capacitor is grounded;
the oscillating circuit includes: the inductor, the second capacitor, the sixteenth capacitor and the seventeenth capacitor;
one end of the inductor is connected with one end of the second capacitor, and the other end of the inductor is connected with the other end of the second capacitor; one end of the second capacitor is connected with one end of the sixteenth capacitor, and the other end of the second capacitor is connected with the other end of the sixteenth capacitor; one end of the sixteenth capacitor is connected with one end of the seventeenth capacitor, the other end of the sixteenth capacitor is connected with the other end of the seventeenth capacitor, and the other end of the seventeenth capacitor is connected with the collector electrode of the triode;
the oscillating circuit further comprises: the first capacitor, the third capacitor, the second switch and the third switch;
one end of the first capacitor is connected with one end of the third switch, the other end of the first capacitor is connected with one end of the seventeenth capacitor, and the other end of the third switch is connected with the other end of the seventeenth capacitor;
one end of the third capacitor is connected with one end of the second switch, the other end of the third capacitor is connected with the other end of the first capacitor, and the other end of the second switch is connected with the other end of the third switch.
2. The digital pen as claimed in claim 1, wherein the grip detection sensor comprises an upper grip detection ring, an upper grip detection sensor, a lower grip detection ring, and a lower grip detection sensor;
the upper holding position detection ring and the lower holding position detection ring are sleeved on the digital pen body; a gap is arranged between the upper holding position detection ring and the lower holding position detection ring;
the upper holding position detection ring is connected with the upper holding position detection sensor, and the lower holding position detection ring is connected with the lower holding position detection sensor;
when a user touches the upper holding position detection ring when holding a pen, the upper holding position detection sensor outputs a low level which is recorded as upper holding position information;
when a user touches the lower holding position detection ring when holding a pen, the lower holding position detection sensor outputs a low level which is recorded as lower holding position information;
when a user holds the pen, the upper holding position detection ring and the lower holding position detection ring are not contacted, and the upper holding position detection sensor and the lower holding position detection sensor can simultaneously output high level and record as middle holding position information.
3. The digital pen as claimed in claim 2, wherein both the upper grip detection sensor and the lower grip detection sensor employ GT3LS 01L.
4. The digital pen as recited in claim 3, further comprising an upper grip LED lamp and a lower grip LED lamp;
the output end of the upper holding position detection sensor is connected with the upper holding position LED lamp, and when the output end of the upper holding position detection sensor outputs a low level, the upper holding position LED lamp is conducted to emit light;
the output end of the lower holding position detection sensor is connected with the lower holding position LED lamp, and when the output end of the lower holding position detection sensor outputs a low level, the lower holding position LED lamp is conducted to emit light.
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| CN202011587651.7A CN112732073B (en) | 2020-12-29 | 2020-12-29 | Digital pen |
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| CN202011587651.7A CN112732073B (en) | 2020-12-29 | 2020-12-29 | Digital pen |
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| CN112732073B true CN112732073B (en) | 2022-07-22 |
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| CN103995590A (en) * | 2014-05-16 | 2014-08-20 | 沈阳工业大学 | Electronic handwriting pen and method for correcting pen holding gestures |
| CN210283700U (en) * | 2019-06-12 | 2020-04-10 | 深圳市慧乐智能科技有限公司 | A smart pen for correcting writing posture |
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| DE202004021638U1 (en) * | 2003-02-10 | 2009-12-31 | N-Trig Ltd. | Touch detection for a digitizer |
| CN201012583Y (en) * | 2007-03-19 | 2008-01-30 | 梁磊 | Holding position reminding pen |
| US10019079B2 (en) * | 2014-12-07 | 2018-07-10 | Microsoft Technology Licensing, Llc | Stylus for operating a digitizer system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103995590A (en) * | 2014-05-16 | 2014-08-20 | 沈阳工业大学 | Electronic handwriting pen and method for correcting pen holding gestures |
| CN210283700U (en) * | 2019-06-12 | 2020-04-10 | 深圳市慧乐智能科技有限公司 | A smart pen for correcting writing posture |
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