CN215006589U

CN215006589U - Intelligent pen and writing interaction system

Info

Publication number: CN215006589U
Application number: CN202121955802.XU
Authority: CN
Inventors: 雷俊杰; 李卓珺; 詹梓煜
Original assignee: Maxeye Smart Technologies Co ltd
Current assignee: Maxeye Smart Technologies Co ltd; Shenzhen Qianfenyi Intelligent Technology Co Ltd
Priority date: 2021-08-19
Filing date: 2021-08-19
Publication date: 2021-12-03
Anticipated expiration: 2031-08-19

Abstract

The utility model discloses an intelligent pen and writing interactive system, wherein, the intelligent pen comprises a main controller; the ranging trigger signal input end is used for accessing a ranging trigger signal; the distance measuring circuit is used for measuring the minimum relative distance between the intelligent pen and the touch screen and outputting a distance detection signal when the intelligent pen works; the communication circuit is used for realizing communication connection between the main controller and the display equipment; the main controller is used for controlling the distance measuring circuit to work when receiving the distance measuring trigger signal and receiving the distance detecting signal output by the distance measuring circuit; the main controller is further used for outputting a track display signal to the display device when the minimum relative distance between the intelligent pen and the touch screen is determined to be smaller than or equal to a first preset distance threshold value according to the distance detection signal, so that the touch screen displays a writing track corresponding to the track display signal. The utility model discloses technical scheme can improve user's writing experience.

Description

Intelligent pen and writing interaction system

Technical Field

The utility model relates to an intelligence pen technical field, in particular to intelligence pen and writing interactive system.

Background

At present, an active capacitance pen is generally used to implement writing on a display device such as a tablet or a mobile phone. However, in the existing active capacitive pen technical scheme, a user needs to apply a certain pressure to enable the intelligent pen to trigger the display device to display the writing track. Thus, the writing experience of the user is poor.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an intelligence pen aims at solving the user and writes the relatively poor problem of experience.

In order to achieve the above object, the utility model provides an intelligence pen is applied to and writes interactive system, write interactive system including the display device who has the touch screen, intelligence pen includes:

a main controller;

the ranging trigger signal input end is used for accessing a ranging trigger signal;

the distance measuring circuit is used for measuring the minimum relative distance between the intelligent pen and the touch screen and outputting a distance detection signal when the intelligent pen works; and the number of the first and second groups,

the communication circuit is used for realizing communication connection between the main controller and the display equipment;

the main controller is respectively connected with the ranging trigger signal input end, the ranging circuit output end and the communication circuit, and is used for controlling the ranging circuit to work when receiving the ranging trigger signal and receiving a distance detection signal output by the ranging circuit;

and the main controller is further used for outputting a track display signal to the display equipment when the minimum relative distance between the intelligent pen and the touch screen is determined to be smaller than or equal to a first preset distance threshold value according to the distance detection signal, so that the touch screen displays a writing track corresponding to the track display signal.

Optionally, the smart pen further comprises:

and the output end of the user trigger circuit is connected with the input end of the ranging trigger signal, and the user trigger circuit is used for outputting the ranging trigger signal to the input end of the ranging trigger signal when being triggered.

Optionally, the smart pen further comprises:

and the output end of the motion state detection circuit is connected with the distance measurement trigger signal input end, and the motion state detection circuit is used for outputting a distance measurement trigger signal to the distance measurement trigger signal input end when detecting that the intelligent pen is in a motion state.

Optionally, the smart pen further comprises:

a pen holder part;

the pen point part is detachably connected with one end of the pen holder part;

the main controller, the ranging trigger signal input end and the communication circuit are arranged on the first circuit board, and the first circuit board is accommodated in the pen holder part; and

the distance measuring circuit is arranged on the second circuit board, and the second circuit board is contained in the pen point part.

Optionally, the ranging circuit has a measurement signal transceiving end; the measurement signal transceiving end is used for transmitting a measurement signal to the touch screen and receiving the measurement signal reflected by the touch screen;

the pen point part further comprises a pen point shell, wherein a through hole is formed in the pen point shell corresponding to the measuring signal receiving and transmitting end, so that the measuring signal transmitted by the measuring signal receiving and transmitting end can be emitted out, and the measuring signal reflected by the touch screen can be emitted into the pen point part.

Optionally, the number of the distance measuring circuit is a plurality of, the number of the through holes is the same as the number of the distance measuring circuit, and the through holes are a plurality of and extend along the axis of the pen point shell and are circumferentially distributed along the axis of the pen point shell.

Optionally, the number of the ranging circuits is 2 or 4.

Optionally, the smart pen further comprises:

the pressure sensing circuit is arranged at the pen point part and used for detecting the contact pressure between the pen point part and the touch screen and outputting a pressure detection signal;

the main controller is further connected with the output end of the pressure sensing circuit and is further used for outputting a track display signal to the display device according to the pressure detection signal and the distance detection signal, so that the touch screen displays a writing track with corresponding preset track parameters.

Optionally, the distance measuring circuit is a laser distance measuring circuit;

or the distance measuring circuit is an ultrasonic distance measuring circuit;

or the distance measuring circuit is an infrared distance measuring circuit.

The utility model discloses still provide a write interactive system, write interactive system includes:

the display device is provided with a touch screen; and the number of the first and second groups,

a smart pen as described above;

the intelligent pen is in communication connection with the touch screen.

The utility model discloses intelligence pen is through adopting main control unit, the range finding trigger signal input, range finding circuit and communication circuit, and through making main control unit when receiving the range finding trigger signal that range finding trigger signal input inserts, the minimum relative distance of control range finding circuit measurement intelligence pen and touch-control screen, and return output distance detected signal to main control unit, so that main control unit still is used for according to distance detected signal, confirm when the minimum relative distance of intelligence pen and touch-control screen is less than or equal to first preset distance threshold value, output orbit display signal to display device, so that the touch-control screen can show the orbit of writing that corresponds with the orbit display signal. The utility model discloses technical scheme is through integrated range finding function in intelligent pen to make intelligent pen can be when detecting self and touch screen distance too near, the orbit is write in the display of automatic trigger touch screen, need not the user and applys pressure and can realize that the intelligent pen trade pursues "0 g goes out water", very big improvement user's the experience of writing.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic circuit block diagram of an embodiment of a writing interaction system of the present invention;

fig. 2 is a schematic diagram of a circuit module according to an embodiment of the smart pen of the present invention;

fig. 3 is a schematic structural diagram of another embodiment of the smart pen of the present invention.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				10	Main controller	100	Pen holder part
20	Ranging trigger signal input terminal	200	Pen point
				30	Distance measuring circuit	210	Nib shell
31	Ultrasonic transmitting-receiving probe	220	Perforation
				40	Communication circuit	230	Pressure sensing circuit
50	Subscriber triggering circuit	300	Touch control screen
				60	Motion state detection circuit	A1	Axis of nib casing

The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

In addition, descriptions in the present application as to "first", "second", and the like are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

The utility model provides an intelligence pen is applied to and writes in the interactive system.

Currently, a display device in a writing interactive system usually employs a touch screen and is configured with an active capacitive pen to facilitate a user to write on the touch screen, and the display device needs to receive a track display signal output by an intelligent pen, which is also called a water outlet signal, and then displays a writing track on the touch screen. The existing intelligent pen adopts a resistance or capacitance type pressure sensor to detect whether the intelligent pen contacts a touch screen or not, and outputs a track display signal to a display device when the intelligent pen contacts the touch screen, but because the resistance or capacitance type pressure sensor has sensitivity error, namely a pressure threshold value, the intelligent pen can be triggered to output the track display signal only when the pressure of a pen point is higher than the pressure threshold value. Therefore, when the user uses the intelligent pen, the user needs to apply certain pressure to enable the touch screen to have a writing track, and the writing experience is poor.

Referring to fig. 1 to 3, in an embodiment of the present invention, the smart pen includes:

a main controller 10;

a ranging trigger signal input terminal 20 for accessing a ranging trigger signal;

the distance measuring circuit 30 is configured to measure a minimum relative distance between the smart pen and the touch screen 300 during operation, and output a distance detection signal; and the number of the first and second groups,

a communication circuit 40 for realizing communication connection between the main controller 10 and the display device;

the master controller 10 is respectively connected to the ranging trigger signal input terminal 20, the output terminal of the ranging circuit 30 and the communication circuit 40, and the master controller 10 is configured to control the ranging circuit 30 to operate when receiving the ranging trigger signal, and receive the distance detection signal output by the ranging circuit 30;

the main controller 10 is further configured to output a trace display signal to the display device when it is determined that the minimum relative distance between the smart pen and the touch screen 300 is less than or equal to a first preset distance threshold according to the distance detection signal, so that the touch screen 300 displays a writing trace corresponding to the trace display signal.

In this embodiment, the ranging trigger signal input terminal 20 may be connected to the smart pen, for example: the switch key or the gyroscope and other functional components or circuits are connected and used for receiving a ranging trigger signal which is output when the other functional components or circuits are triggered by a user or meet preset conditions and is used for representing starting ranging.

The distance measuring circuit 30 may emit a measuring signal such as a laser signal, an ultrasonic signal, or an infrared signal when operating. It is understood that a person skilled in the art can set the position of the distance measuring circuit 30 in the smart pen, so that the measuring signal emitted by the distance measuring circuit 30 when the smart pen is in use can be transmitted to the touch screen 300 and can be reflected by the touch screen 300. The distance measuring circuit 30 may further receive the measurement signal reflected by the touch screen 300, and analyze and process the measurement signal to obtain a distance represented by the reflected measurement signal, and convert the distance into a relative distance between the pen point of the smart pen and the touch screen 300, that is, a minimum relative distance between the smart pen and the touch screen 300 at this time, thereby implementing distance measurement from the touch screen 300. The distance measuring circuit 30 can also output the distance detecting signal corresponding to the minimum relative distance to other functional circuits according to the measurement result for identification and comparison.

The communication circuit 40 may be a wireless communication circuit 40 such as a bluetooth communication circuit 40, a WIFI communication circuit 40, a Zigbee communication circuit 40, etc.; alternatively, 3G/4G/5G communication circuit 40 may also be used. The communication circuit 40 is used for converting electric signals output by other functional components or circuits in the smart pen during working into radio frequency signals of corresponding types, and then sending the radio frequency signals to the display device so as to trigger functions of writing, drawing or work data uploading of the smart pen; and the intelligent pen can also receive radio frequency signals output by the display equipment, convert the received radio frequency signals into electrical signals and output the electrical signals to other functional components or circuits in the intelligent pen, so that the intelligent pen is monitored by the display equipment.

The main controller 10 can be a microprocessor such as MUC, DSP, FPGA, etc.; or, the system can also be a special main control chip. The main controller 10 may analyze and process the received various signals to determine the respective triggered functions of the received various signals, and may start the distance measurement function of the smart pen when receiving the distance measurement trigger signal, that is, control the distance measurement circuit 30 to measure the minimum relative distance between the smart pen and the touch screen 300, and the main controller 10 may further receive the distance detection signal output by the distance measurement circuit 30, and may perform analysis and processing on the distance detection signal to obtain the distance value corresponding to the distance detection signal after converting the distance detection signal into a digital signal. The main controller 10 may further run a hardware circuit or a software program and an algorithm for comparison, and call a first pre-set distance threshold stored in advance, so as to compare the distance value corresponding to the distance detection signal with the distance value corresponding to the first pre-set distance threshold, and may compare the comparison result with: when the distance value corresponding to the distance detection signal is less than or equal to the distance value corresponding to the first preset distance threshold, it is determined that the distance between the smart pen and the touch screen 300 is too close. Therefore, by setting the distance corresponding to the first predetermined distance threshold to a smaller value, for example, 0.2mm, the main control device can indirectly determine that the pen tip of the smart pen has contacted the touch screen 300 when determining that the distance between the smart pen and the touch screen 300 is too close, and then output a trace display signal to the display device through the communication circuit 40, so as to trigger the display device to display the writing trace at the corresponding position on the touch screen 300. Of course, in another embodiment, it may also be determined that the smart pen is too close to the touch screen 300 when the distance value corresponding to the distance detection signal is greater than the distance value corresponding to the first preset distance threshold.

So, when the user used the smart pen, the accessible triggered other functional module in the smart pen output range finding trigger signal and makes the electric-controlled main control ware 10 control the work of range finding way, thereby open the range finding function of smart pen, so that the smart pen can be when detecting self and touch-control screen 300 distance too near, the automatic output orbit shows the signal and triggers touch-control screen 300 and show and write the orbit, consequently need not the user and exert pressure and can realize that the smart pen trade pursue "0 g goes out water", the user puts the touch-control screen 300 with the pen gently and does not add pressure and can go out water, very big improvement user's writing experience.

Currently, there is a scheme of "0 g water out" in the market, that is, a coupling capacitor formed by an active capacitive pen tip and the touch screen 300 is utilized, and an uplink signal is sent to the smart pen through the coupling capacitor by a corresponding circuit in the display device, so that the smart pen can determine whether to output a track display signal by detecting the strength of the received uplink signal. However, the scheme of "0 g water out" is seriously affected by the processing technology of the touch screen 300, the external environment during use, the detection precision of the main controller 10 in the smart pen, and other factors, and has a large deviation, so that the real "0 g water out" cannot be realized in practical application. In the scheme of the application, "0 g water outlet" is realized by adopting distance detection, so that the market defects are overcome, the influence of the processing technology of the touch screen 300, the external environment during use and the detection precision of the main controller 10 is small, and the active capacitance pen is widely applied to the market.

Referring to fig. 1 to 3, in an embodiment of the present invention, the smart pen further includes:

the smart pen further comprises:

and the output end of the user trigger circuit 50 is connected with the ranging trigger signal input end 20, and the user trigger circuit 50 is used for outputting a ranging trigger signal to the ranging trigger signal input end 20 when being triggered.

The user trigger circuit 50 may include a touch panel and other input devices. The touch panel, also called a touch screen, may collect touch operations of a user (for example, operations of the user on or near the touch panel using a finger, a stylus, or any other suitable object or accessory) thereon or nearby, and output a key signal representing a corresponding function according to a preset program. The touch panel may be of various types, such as a resistive type, a capacitive type, an infrared ray, a surface acoustic wave, and the like, and is not limited herein. In addition to the touch panel, the user trigger circuit 50 may further include one or more of a physical keyboard, a function key (e.g., a switch key for controlling on/off of the smart pen, or a switch key dedicated for controlling on/off of the distance measuring pen, etc.), a track ball, a mouse, a joystick, etc., which is not limited herein. So set up, can simplify the user and open the operation step of intelligent pen range finding function, be favorable to improving user's operation convenience.

and the output end of the motion state detection circuit 60 is connected with the distance measurement trigger signal input end 20, and the motion state detection circuit 60 is used for outputting a distance measurement trigger signal to the distance measurement trigger signal input end 20 when detecting that the smart pen is in a motion state.

The motion state detection circuit 60 may be implemented by using an acceleration sensor such as a gyroscope. The motion state detection circuit 60 may detect the motion states of the smart pen in a plurality of preset directions, and may calculate the overall motion acceleration of the smart pen according to the detection result. The motion state detection circuit 60 may also compare the calculated motion acceleration with a predetermined acceleration threshold, and may compare the calculated motion acceleration with a predetermined acceleration threshold when the comparison result is: when the acceleration value corresponding to the motion acceleration is greater than or equal to the acceleration value corresponding to the preset acceleration threshold, it is determined that the user is taking the smart pen at the moment and is about to use the smart pen, and then a ranging trigger signal is output to the main controller 10, so that the ranging function is automatically started. In another alternative embodiment, the preset acceleration threshold may also be integrated into the main controller 10, and the motion state detection circuit 60 may output an acceleration detection signal corresponding to the motion acceleration to the main controller 10 according to the detection result, so that the main controller 10 compares the acceleration detection signal with the preset acceleration threshold to determine whether to start the ranging function. It is to be understood that the preset acceleration threshold may be determined according to actual needs, and is not limited herein. So set up for the intelligence pen can be favorable to further improving user's operation convenience according to the automatic range finding function of opening of user's operation of taking.

a pen shaft portion 100;

a nib portion 200 having one end detachably connected to the nib portion 100;

the main controller 10, the ranging trigger signal input end 20 and the communication circuit 40 are arranged on the first circuit board, and the first circuit board is accommodated in the pen rod part 100; and

the distance measuring circuit 30 is disposed on the second circuit board, and the second circuit board is accommodated in the nib portion 200.

In this embodiment, the pen shaft 100 may be a cylindrical structure such as a nearly cylindrical shape or a nearly prismatic shape, and is used to be held by a user; the nib portion 200 may have a tapered structure such as a nearly conical shape or a nearly pyramidal shape, one end of which is detachably connected to the nib portion 100, and the other end of which is in contact with the touch screen 300. The pen point part 100 and the pen point part 200 may be respectively hollow for accommodating functional components such as a first circuit board and a second circuit board; the first circuit board and the second circuit board may be hard-brush circuit boards, on which the main controller 10, the ranging trigger signal input terminal 20, the communication circuit 40 and the ranging circuit 30 are correspondingly welded, and may be electrically connected to each other through circuit wiring, and when the pen holder portion 100 and the pen tip portion 200 are connected, the first circuit board and the second circuit board may be electrically connected through a flexible circuit board or a connector. In another alternative embodiment, the first circuit board and the second circuit board may also be the same circuit board. The utility model discloses technical scheme can conveniently calculate the minimum relative distance of intelligent pen and touch-control screen 300 according to the measuring signal of touch-control screen 300 reflection through locating pen point portion 200 with ranging circuit 30, is favorable to reducing design cost, and can dismantle with pen point portion 200 through pen-holder portion 100 and be connected, conveniently when the test circuit trouble needs to be changed, need not whole pen change, only need more change pen point portion 200 can, be favorable to reducing the replacement cost.

Referring to fig. 1 to 3, in an embodiment of the present invention, the ranging circuit 30 has a measurement signal transceiver end; the measurement signal transceiver is configured to transmit a measurement signal to the touch screen 300 and receive the measurement signal reflected by the touch screen 300;

the nib portion 200 further includes a nib housing 210, and the nib housing 210 is provided with a through hole 220 corresponding to the measurement signal transceiving end for emitting the measurement signal transmitted by the measurement signal transceiving end and for emitting the measurement signal reflected by the touch screen 300.

In this embodiment, the measurement signal transceiver is used to send out a measurement signal under the driving of the corresponding functional circuit in the distance measuring circuit 30, receive the measurement signal reflected by the touch screen 300, and output a corresponding electrical signal to the corresponding functional circuit in the distance measuring circuit 30, so that the corresponding functional circuit can calculate the minimum relative distance between the smart pen and the touch screen 300. The cross-sectional shape of the through holes 220 can be regular shapes such as circles, triangles and prisms; alternatively, the shape may be irregular, and it is understood that the size of the cross-sectional area of the through hole 220 is determined according to actual needs, which is not described herein. The through hole 220 is used to communicate the measurement signal transceiver with the outside, so that the measurement signal transmitted from the measurement signal transceiver can reach the touch screen 300 through the through hole 220, and the measurement signal reflected by the touch screen 300 can return to the measurement signal transceiver through the through hole 220. So set up, can play the gathering effect to the measured signal, be favorable to reducing measured signal scattering and improve the precision that the distance detected in measuring.

Referring to fig. 1 to 3, in an embodiment of the present invention, the distance measuring circuit 30 is plural, the number of the through holes 220 is the same as the number of the distance measuring circuit 30, and the plural through holes 220 extend along the axis a1 of the nib housing 210 and are circumferentially distributed along the axis a1 of the nib housing 210.

Optionally, the number of the ranging circuits 30 is 2 or 4.

In this embodiment, when the number of the test circuits is multiple, the number of the through holes 220 is also multiple, and each through hole 220 is set corresponding to the measurement signal transceiving end of one test circuit. The through holes 220 may be disposed at a same predetermined distance from the axis a1 of the nib housing 210 and extend toward both ends along the axis a1 of the nib housing 210 to communicate the corresponding measurement signal transceiver with the outside, and the included angles formed between any two adjacent through holes 220 and the axis a1 of the nib housing 210 are the same to achieve circumferential distribution of the through holes 220 along the axis a1 of the nib housing 210, that is, the through holes 220 are located on a circle centered on the axis a1 of the nib housing 210 and having the predetermined distance as a radius. In this manner, it is advantageous to improve the optimal layout of multi-way ranging circuit 30 and plurality of perforations 220 in nib 200.

In practical applications, when the user uses the smart pen, an included angle formed between the smart pen and the touch screen 300 is mostly an acute angle, and by providing the multi-path ranging circuits 30, each ranging circuit 30 can receive the respective transmitted and returned measurement signal, and can output a path of distance detection signal to the main controller 10, so that the main controller 10 can obtain the minimum relative distance between the smart pen and the touch screen 300 by performing an averaging operation on the received multi-path distance detection signals. Thus, the design cost of the main controller 10 can be reduced, and it is advantageous to further improve the accuracy of distance detection. It should be noted that, when the included angle formed by any two adjacent through holes 220 and the axis a1 of the pen tip housing 210 is different, the technical solution of the present application can be implemented only by ensuring that the plurality of through holes 220 are located on a circle that uses the axis a1 of the pen tip housing 210 as the center of a circle and uses the preset distance as the radius.

In another embodiment, the distance measuring circuits 30 are provided in two paths, and the two paths of distance measuring circuits 30 are preferably disposed on opposite sides of the axis a1 of the pen tip housing 210, that is, on different radii of the same diameter, so that an average value of distance values corresponding to the distance detection signals output by the two paths of distance measuring circuits 30 is the minimum relative distance between the smart pen and the touch screen 300. In another embodiment, the number of the distance measuring circuits 30 is four, and the four distance measuring circuits 30 are preferably respectively disposed on different radii of two perpendicular diameters, so that the main controller 10 can perform distance detection by averaging the distance values corresponding to the 4 distance detection signals.

a pressure sensing circuit 230, disposed at the pen tip portion 200, for detecting a contact pressure between the pen tip portion 200 and the touch screen 300 and outputting a pressure detection signal;

the main controller 10 is further connected to an output end of the pressure sensing circuit 230, and the main controller 10 is further configured to output a trace display signal to the display device according to the pressure detection signal and the distance detection signal, so that the touch screen 300 displays a writing trace having a corresponding preset trace parameter.

In this embodiment, the pressure sensing circuit 230 may be implemented by using discrete devices such as a pressure sensitive resistor, a resistor, and a capacitor; alternatively, a dedicated pressure sensor may be used. The pressure sensing circuit 230 may be disposed at one end of the stylus portion 200 for contacting the touch screen 300, and is configured to detect a pressure when the stylus portion 200 contacts the touch screen 300, and output a pressure detection signal corresponding thereto to the main controller 10. The main controller 10 may further include a plurality of pressure preset thresholds, so that when it is determined that the distance between the smart pen and the touch screen 300 is too short, preset trajectory parameters of the writing trajectory can be adjusted according to a magnitude relationship between a pressure value corresponding to the pressure detection signal and the plurality of pressure thresholds; the preset track parameters include, but are not limited to: track width and track color.

The explanation is given by taking an example that the main controller 10 is provided with two pressure thresholds, namely a first preset pressure threshold and a second preset pressure threshold, and the preset track parameter is a track width, wherein a pressure value corresponding to the first preset pressure threshold is smaller than a pressure value corresponding to the second preset pressure threshold. When the distance detection signal is greater than the first preset distance threshold and the pressure detection signal is less than or equal to the first preset pressure threshold, the main controller 10 may determine that the smart pen is too far away from the touch screen 300 at this time, and may not output a track display signal; when the distance detection signal is less than or equal to the first preset distance threshold and the pressure detection signal is less than or equal to the first preset pressure threshold, the main controller 10 may determine that the smart pen is too close to the touch screen 300 but the user does not apply too much pressure at this time, and may output the first trajectory display signal to the display device, so that the touch screen 300 may display a writing trajectory with a narrower trajectory width; when the distance detection signal is less than or equal to the first preset distance threshold and the pressure detection signal is greater than the first preset pressure threshold, the main controller 10 may determine that the smart pen is too close to the touch screen 300 but the user applies too much pressure, and may output the second trace display signal to the display device, so that the touch screen 300 may display a writing trace with a wider trace width. In another optional embodiment, the second track display signal is a real-time signal determined according to a pressure value corresponding to the pressure detection signal, and the larger the pressure value corresponding to the pressure detection signal is, the wider the track width displayed by the touch screen 300 of the display device after receiving the second track display signal is. So, make the user can adjust the trajectory parameter of writing the orbit through the contact pressure of control intelligence pen and touch-control screen 300 when writing, be favorable to improving the function integration level of intelligence pen and user's the experience of writing.

Referring to fig. 1 to 3, in an embodiment of the present invention, the distance measuring circuit 30 is a laser distance measuring circuit 30;

or, the distance measuring circuit 30 is an ultrasonic distance measuring circuit 30;

alternatively, the distance measuring circuit 30 is an infrared distance measuring circuit 30.

In this embodiment, the distance measuring circuit 30 may be one or a combination of a laser distance measuring circuit 30, an ultrasonic distance measuring circuit 30 and an infrared distance measuring circuit 30; the laser ranging circuit 30 may be a laser transceiver probe, and is configured to send and receive a measurement signal of a laser signal; the ultrasonic ranging circuit 30 may be an ultrasonic transceiver probe 31 for transmitting and receiving a measurement signal of an ultrasonic signal; the infrared distance measuring circuit 30 may be an infrared transceiving probe for sending and receiving a measuring signal of an infrared signal. The distance measuring circuit 30 may be provided with a timer to obtain a time difference between the measurement signal sent by itself and the received and reflected measurement signal, and may calculate the minimum relative distance between the smart pen and the touch screen 300 according to the time difference and the propagation speed of the corresponding measurement signal. So set up for ranging circuit 30 accessible send and receive laser, ultrasonic wave or infrared ray realize the range finding function, need not to set up complicated hardware circuit, but all active capacitance pen schemes of adaptation are favorable to improving the range of application.

The utility model discloses still provide a write interactive system, this write interactive system includes display device and intelligent pen, and the concrete structure of this intelligent pen refers to above-mentioned embodiment, because this write interactive system has adopted the whole technical scheme of above-mentioned all embodiments, consequently has all beneficial effects that the technical scheme of above-mentioned embodiment brought at least, and the repeated description is no longer given here. The display device is provided with a touch screen, is in communication connection with the intelligent pen, and is used for driving the touch screen to correspondingly display a writing track when receiving a track display signal output by the intelligent pen.

The above is only the optional embodiment of the present invention, and not the scope of the present invention is limited thereby, all the equivalent structure changes made by the contents of the specification and the drawings are utilized under the inventive concept of the present invention, or the direct/indirect application in other related technical fields is included in the patent protection scope of the present invention.

Claims

1. A smart pen applied to a writing interaction system including a display device having a touch screen, the smart pen comprising:

a main controller;

2. The smart pen of claim 1, further comprising:

3. The smart pen of claim 1, further comprising:

4. The smart pen of claim 1, further comprising:

a pen holder part;

the pen point part is detachably connected with one end of the pen holder part;

5. The smart pen of claim 4, wherein the ranging circuit has a measurement signal transceiving end; the measurement signal transceiving end is used for transmitting a measurement signal to the touch screen and receiving the measurement signal reflected by the touch screen;

6. The smart pen of claim 5, wherein the distance measurement circuit is plural in number, the number of the perforations is the same as the number of the distance measurement circuit, and the plurality of the perforations extend along the axis of the tip housing and are circumferentially distributed along the axis of the tip housing.

7. The smart pen of claim 6, wherein the number of ranging circuits is 2 or 4.

8. The smart pen of claim 4, further comprising:

9. The smart pen of any one of claims 1 to 8, wherein the ranging circuit is a laser ranging circuit;

or the distance measuring circuit is an ultrasonic distance measuring circuit;

or the distance measuring circuit is an infrared distance measuring circuit.

10. A writing interaction system, comprising:

a smart pen according to any one of claims 1 to 9;

the intelligent pen is in communication connection with the touch screen.