CN101587414A - Handwriting input device - Google Patents
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- CN101587414A CN101587414A CNA2008101127004A CN200810112700A CN101587414A CN 101587414 A CN101587414 A CN 101587414A CN A2008101127004 A CNA2008101127004 A CN A2008101127004A CN 200810112700 A CN200810112700 A CN 200810112700A CN 101587414 A CN101587414 A CN 101587414A
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Abstract
The invention discloses a handwriting input device, which is wirelessly connected with a computer. The handwriting input device comprises a handwriting pad and a handwriting pen which are wirelessly connected, and the handwriting pen comprises a parallel resonance circuit for power supply, a radiofrequency transmitter connected with the handwriting pad and a radiofrequency receiver connected with the computer, wherein the handwriting pad receives handwriting data information of users; the radiofrequency transmitter sends the handwriting data information to the corresponding radiofrequency receiver; and the radiofrequency receiver sends the handwriting data information to the computer. The invention discloses the handwriting input device which is applicable to remote handwriting input and is wireless and passive; and the device has the advantages of simple structure, short activation time, less power consumption, less resource occupation and relatively lower cost, can also ensure the longer wireless transmission distance, and has good multi-point network connection capability.
Description
Technical field
The present invention relates to the handwriting recognition technology field, particularly a kind of hand input device.
Background technology
Hand input device is a kind of computer entry device, as handwriting pad, numerical digit plate etc., generally is to use a special pen, writing words or graphing in specific zone.The track record that hand input device is passed by pen by the whole bag of tricks gets off, and is identified as literal or figure then.Can be used for the input of circuit design, CAD design, graphic designs, free drawing and text and data etc.Through years of development, writing technology reaches its maturity, the hand input device product of main flow comprises in the market: be connected to carry out data communication by connecting line (as the USB connecting line) between wired handwriting pad (between handwriting pad and the writing pencil connecting line being arranged), wireless handwriting pad (not having connecting line between handwriting pad and the writing pencil) and the wireless and passive handwriting pad (do not have between handwriting pad and the writing pencil in connecting line, the writing pencil and do not have battery), these handwriting pads and computing machine.Data communication with general wireless and passive handwriting pad and computing machine is an example, this wireless and passive handwriting pad receives the track and the pressure information of writing pencil typing, after being converted to X, Y coordinate data and pressure data, be input on the computing machine by USB interface or other interface, cooperate corresponding driving program and application software, the user directly is reflected on the screen of computing machine at track drawn on the handwriting pad.
As can be seen, this class handwriting pad is to be connected realization by hardware with the data communication of computing machine, and the handwriting pad moving range is limited, is only applicable to closely point-to-point handwriting input, can't be applied to remote handwriting input.To this, those skilled in the art attempt research and realize writing technology based on basket tooth wireless technology at present, common this bluetooth hand input device is made up of handwriting pad, writing pencil and Bluetooth Receiver, though this bluetooth hand input device can solve the problem of wireless handwriting input, but because it is based on basket tooth wireless technology, so there is following problem inevitably:
One, slave networking time long (more than or equal to 3 seconds), dormancy device activation time slow (about 3 seconds);
Its two because basket tooth protocol stack structure complexity, expend system resource many (occupying system resources is about 250Kb), and basket tooth equipment power dissipation is big, cost of development is also than higher;
They are three years old, the distance of Bluetooth transmission is lacked (only about 10 meters), need to strengthen emissive power and could realize remote handwriting input, but wireless handwriting pad generally all is to adopt powered battery, realize to expend the bigger energy content of battery more at a distance, and distance still is subjected to battery powered restriction;
Its four, the quantity of bluetooth equipment networking is few, the single network number of devices is generally 8.
Thereby, those skilled in the art press for develop a kind of simple in structure, power consumption is less, cost is lower, can realize the hand input device of long-distance transmissions, wireless and passive.
Summary of the invention
Technical matters to be solved by this invention provides a kind of hand input device remote handwriting input, wireless and passive that is applicable to, this apparatus structure is simple, activationary time is short, power consumption is little, resource occupation is few, cost is also lower; Can also guarantee that wireless transmission distance is longer; And has an extraordinary multidrop network concatenation ability.
For solving the problems of the technologies described above, the embodiment of the invention discloses a kind of hand input device, described hand input device is connected with computer radio, and described hand input device comprises:
The handwriting pad of wireless connections and writing pencil comprise the antiresonant circuit of the usefulness of powering in the described writing pencil;
The radio-frequency (RF) transmitter that is connected with described handwriting pad, and, the radio frequency receiver that is connected with described computing machine;
Wherein, described handwriting pad receives user's hand-written data information, by described radio-frequency (RF) transmitter described hand-written data information is sent to corresponding radio frequency receiver, and described radio frequency receiver sends described hand-written data information to computing machine.
Preferably, described radio-frequency (RF) transmitter comprises: handwriting pad communication interface, radio frequency send processor of single chip computer, radio frequency sending module and radio frequency transmitting antenna; Described radio frequency receiver comprises: radio frequency receiving antenna, Receiver Module, radio frequency receive processor of single chip computer and Computer Communications Interface;
Wherein, described handwriting pad is sent to radio frequency with the hand-written data information that receives by described handwriting pad communication interface and sends processor of single chip computer; After described radio frequency transmission processor of single chip computer carries out encoding process based on the zigbee standard to described hand-written data information, be sent to corresponding radio frequency receiver by described radio frequency sending module and radio frequency transmitting antenna;
Described radio frequency receiving antenna and Receiver Module receive the hand-written data information that described radio-frequency (RF) transmitter sends, and are sent to radio frequency reception processor of single chip computer; Described radio frequency receives processor of single chip computer based on the zigbee standard described hand-written data information is carried out correspondingly decoding processing after, be passed to computing machine by described Computer Communications Interface.
Preferably, described radio frequency sending module and radio frequency transmitting antenna are sent to corresponding radio frequency receiver with the 2.4Ghz frequency band with described hand-written data information; Described radio frequency receiving antenna and Receiver Module receive described hand-written data information by the 2.4Ghz frequency band.
Preferably, described handwriting pad communication interface is serial communication interface or SPI interface; Described Computer Communications Interface is a USB interface.
Preferably, described radio-frequency (RF) transmitter has unique address information, and described address information is related with the handwriting pad that described radio-frequency (RF) transmitter connects.
Preferably, described computing machine comprises:
Zigbee agreement control module is used under the control of Zigbee protocol stack, sets up being connected of a plurality of handwriting pads and computing machine according to the address information of described handwriting pad association.
Preferably, described computing machine also comprises:
Display module is used for showing according to the hand-written data information that described radio frequency receiver transmits.
Preferably, described radio-frequency (RF) transmitter is arranged in the handwriting pad.
Preferably, described radio frequency transmitting antenna and radio frequency receiving antenna are F type antenna.
Preferably, described handwriting pad is the electromagnetic induction handwriting pad, and described hand-written data information comprises handwriting coordinate data information and pressure data information.
Compared with prior art, the embodiment of the invention has the following advantages:
1. do not have not have between connecting line, handwriting pad and the computing machine connecting line between writing pencil of the present invention and the handwriting pad yet, use very convenient;
2. because the present invention adopts the zigbee protocol stack, and system architecture is simple, and cost is low, very flexible on using, and equipment power dissipation is very little, normally operation under the situation that equipment can not charge for a long time;
3. the new slave of the present invention networks about 30 milliseconds of time, and the networking time is short.About 8-20 millisecond of dormancy device activation time, equipment is short release time to duty from dormant state;
4. the effective transmission range of the present invention is big, and transmission range is long, does not need to add the high-power long-range data of just realizing and transmits, and can reach 10～70 meters as the indoor transmissions distance;
5. the present invention adopts many-one Star Network connected mode, and the device address is location longways, so the quantity that single network equipment inserts can reach 65535 equipment at most, can solve the network of many equipment handwriting input operation;
6. radio-frequency antenna of the present invention adopts F type antenna, non-directional reception and send data, and have and transmit receiving efficiency and simple structure preferably;
7. the present invention adopts international public frequency range 2.4G wireless communication technique, system's high integration, and good reliability, anti-interference and stability are strong.
Description of drawings
Fig. 1 is the structured flowchart of a kind of hand input device embodiment of the present invention;
Fig. 2 is the circuit connection diagram of a kind of writing pencil of the present invention;
Fig. 3 is the model synoptic diagram of a kind of ZigBee protocol stack of the present invention;
Fig. 4 is the structured flowchart of a kind of radio-frequency (RF) transmitter of the present invention;
Fig. 5 is the structured flowchart of a kind of radio frequency receiver of the present invention;
Fig. 6 is of the present invention a kind of more detailed in the radio-frequency (RF) transmitter of ZigBee and the data interaction process flow diagram of radio frequency receiver.
Embodiment
For above-mentioned purpose of the present invention, feature and advantage can be become apparent more, the present invention is further detailed explanation below in conjunction with the drawings and specific embodiments.
With reference to figure 1, show the structured flowchart of a kind of hand input device embodiment of the present invention, described hand input device is connected 12 with computer radio, can comprise following assembly:
The handwriting pad 111 of wireless connections and writing pencil 112;
The radio-frequency (RF) transmitter 113 that is connected with described handwriting pad 111;
And, the radio frequency receiver 121 that is connected with described computing machine 12;
Wherein, described handwriting pad 111 receives user's hand-written data information, by described radio-frequency (RF) transmitter 113 described hand-written data information is sent to corresponding radio frequency receiver 114, and described radio frequency receiver 114 sends described hand-written data information to computing machine 12.
Handwriting pad can the perception pen the pressure size, thereby obtain hand-written data information, as handwriting coordinate data information and pressure data information etc.Preferably, described handwriting pad can be the electromagnetic induction handwriting pad.Usually, the electromagnetic induction handwriting pad is by after the energising of the wired circuit below the handwriting pad, forms electromagnetic field in the certain space scope, comes induction band to have the position of the nib of coil to carry out work.For example, a kind of circuit structure of electromagnetic induction handwriting pad is: by receiving circuit, and amplification, filtering circuit, amplitude, frequency detection circuit and handwriting pad charging circuit constitute; The connected mode of foregoing circuit is: the receiving end of receiving circuit receive by receiving loop X1, the X2 of vertical direction ... receiving loop Y1, the Y2 of X22 and horizontal direction ... the loop inductance that the receiving array that Y18 constitutes is formed, the input IN end of the output termination amplifying circuit of receiving circuit, the input IN end of the output OUT termination filtering circuit of amplifying circuit, the output OUT termination amplitude of filtering circuit, the input IN of frequency detection circuit end, the output OUT termination of amplitude, frequency detection circuit goes into to handle host CPU.
The antiresonant circuit that can comprise the usefulness of powering in the described writing pencil 112; In this case, writing pencil is passive, promptly need not powered battery, and is powered by the shunt-resonant circuit that electric capacity, inductance are formed.With reference to writing pencil circuit connection diagram shown in Figure 2, a kind of annexation of handwriting pad circuit is: behind switch S 1, S2 difference series capacitance C3, the C4, its two ends are in parallel with variable inductance L1 and capacitor C 1; One end of resistance R 1 links to each other with an end of capacitor C 2, capacitor C 5 respectively, and the other end links to each other with an end of capacitor C 6, resistance R 2 and the base stage of triode Q1 respectively; The collector of Q1 links to each other with the end of switch S 1, S2 respectively; One end of capacitor C 7 links to each other with the collector of Q1; Resistance R 4, capacitor C 8 backs in parallel one end ground connection, the other end links to each other with the end of C7, R3 respectively; The other end of R3 links to each other with the emitter of Q1: the other end of R2, C6, C5, C2 is ground connection respectively; Wherein switch S 1, S2 can be the side switch of writing pencil, and its effect is equivalent to the left-right key of mouse.Handwriting coordinate data information and pressure data information that the user uses writing pencil to import on handwriting pad then can obtain by the circuit of above-mentioned handwriting pad and the circuit inductance of writing pencil.
Preferably, hand input device of the present invention can be a kind of hand input device based on the ZigBee wireless telecommunications.So-called Zigbee is the wireless communication technology title of a kind of short distance, low-power consumption, is characterized in closely, low complex degree, low-power consumption, low data rate, low cost, can embed various device.The basis of Zigbee is IEEE802.15.4, so ZigBee alliance has adopted IEEE802.15.4 as its Physical layer and medium Access Layer standard when formulating the ZigBee standard.On its basis, ZigBee alliance has formulated data link layer (DLL), network layer (NWK) and application programming interface (API) standard.The model synoptic diagram of relevant ZigBee protocol stack as shown in Figure 3.Wherein, application layer, application layer framework and network layer/safe floor can realize by software in rf processor that MAC layer (media access layer) and Physical layer then can be realized by the hardware of rf processor.
In the present embodiment, described rf processor can be made up of radio-frequency (RF) transmitter and radio frequency receiver.
With reference to figure 4, show the structured flowchart of a kind of radio-frequency (RF) transmitter of the present invention, can comprise: handwriting pad communication interface 401, radio frequency send processor of single chip computer 402, radio frequency sending module 403 and radio frequency transmitting antenna 404.
With reference to figure 5, show the structured flowchart of a kind of radio frequency receiver of the present invention, can comprise: radio frequency receiving antenna 501, Receiver Module 502, radio frequency receive processor of single chip computer 503 and Computer Communications Interface 504;
Described handwriting pad (not shown) is sent to radio frequency with the hand-written data information that receives by described handwriting pad communication interface 401 and sends processor of single chip computer 403; After described radio frequency transmission processor of single chip computer 403 carries out encoding process based on the zigbee standard to described hand-written data information, be sent to corresponding radio frequency receiver by described radio frequency sending module 403 and radio frequency transmitting antenna 404;
Described radio frequency receiving antenna 501 and Receiver Module 502 receive the hand-written data information that described radio-frequency (RF) transmitter sends, and are sent to radio frequency reception processor of single chip computer 503; Described radio frequency receives processor of single chip computer 503 based on the zigbee standard described hand-written data information is carried out correspondingly decoding processing after, be passed to the computing machine (not shown) by described Computer Communications Interface 504.
Preferably, described handwriting pad communication interface can be serial communication interface or SPI interface (serialperipheral interface, Serial Peripheral Interface); Described Computer Communications Interface can be USB interface; Described radio frequency transmitting antenna and radio frequency receiving antenna can be F type antenna.
With reference to figure 6, show more in detail based on the radio-frequency (RF) transmitter of ZigBee and the data interaction process flow diagram of radio frequency receiver, specifically can may further comprise the steps:
Step 601, radio-frequency (RF) transmitter and corresponding radio frequency receiver connect;
Radio frequency receiver active scan radio-frequency (RF) transmitter, if radio-frequency (RF) transmitter is scanned, sent requirement and set up the message that communication is connected with radio frequency receiver, then under the condition that radio frequency receiver allows, transmission is set up communication and is connected acknowledge message to radio-frequency (RF) transmitter, and radio-frequency (RF) transmitter just can be set up the communication annexation with described radio frequency receiver after receiving described acknowledge message;
Step 602, radio-frequency (RF) transmitter are packed in the application layer of radio-frequency (RF) transmitter after receiving the hand-written data information of handwriting pad;
Step 603, under radio frequency receiver allows situation that radio-frequency (RF) transmitter sends, packet is encoded, after the operation such as encryption, sent to radio frequency receiver with the 2.4Ghz frequency band by the chip (being that radio frequency sends processor of single chip computer MCU) based on zigbee by the MAC layer of radio-frequency (RF) transmitter, Physical layer;
When radio-frequency (RF) transmitter need send data to radio frequency receiver, radio-frequency (RF) transmitter can be submitted data sending request to radio frequency receiver, if radio frequency receiver responds described request, and return acknowledge message to radio-frequency (RF) transmitter, then radio-frequency (RF) transmitter just can send data to radio frequency receiver.
After step 604, radio frequency receiver receive data by the 2.4Ghz frequency band, by based on the chip of zigbee (being that radio frequency receives processor of single chip computer MCU) to the packet that receives correspondingly decode, operation such as checking;
Step 605, under the condition that checking is passed through, with the hand-written information data after unpacking by the Physical layer of radio-frequency (RF) transmitter, the application layer that the MAC layer is passed to radio frequency receiver;
Step 606, radio frequency receiver carry out data address in application layer to the hand-written information data and confirm, upload processing such as packing data, by Computer Communications Interface packet is sent to computing machine, cooperate corresponding driving program and application software, just can directly be presented at the user on the screen of computing machine at the stroke track of importing on the handwriting pad.
Preferably, described radio-frequency (RF) transmitter has unique address information, and described address information is related with the handwriting pad that described radio-frequency (RF) transmitter connects, and promptly each handwriting pad also has corresponding address information.In this case, described computing machine can also comprise Zigbee agreement control module, is used under the control of Zigbee protocol stack, sets up being connected of a plurality of handwriting pads and computing machine according to the address information of described handwriting pad association.
More preferably, described address is location longways, as reaches the 64BIT position, to realize being connected of more handwriting pads and computing machine.
In practice, described radio-frequency (RF) transmitter can be provided with separately, or is arranged in the handwriting pad; Corresponding radio frequency receiver also can be provided with separately, or is arranged in the computing machine.
Need to prove that at wireless communication technology field, because the bluetooth specification standard was released in the later stage nineties, basket tooth technology was used widely after 2000, those skilled in the art's degree of recognition is better; And the ZigBee standard was just released later six months in 2004, and nearly 2 years just begin popularization and application, and those skilled in the art's degree of recognition is lower;
And, because Bluetooth technology standard transmission speed can reach 1Mbit/s, and the message transmission rate of ZigBee technology is generally 250Kbit/s, and Comparatively speaking, the transfer rate of basket tooth is much bigger, therefore those skilled in the art can select basket tooth wireless communication technique usually for use, and the weak point of less consideration basket tooth technology, as networking capability, power consumption, development cost, complicacy and wake speed or the like up; And hand input device of the present invention is not high to the transmission rate request of hand-written data; Particularly, ZigBee be a kind of closely, low complex degree, low-power consumption, low data rate, the protocol stack of wireless communication technology, and ZigBee cheaply be simple, realize relatively easy, the system resource that needs is also less, and according to estimates, operation ZigBee needs the about 28Kb of system resource; The bluetooth protocol repertory relative complex, it needs system resource to be about 250Kb, low-power consumption also is the key character of ZigBee in addition, and for example in a typical ZigBee sensing network, common alkaline battery can be for ZigBee equipment work six months to 2 years.In addition, network about 30 milliseconds of time based on the new slave of zigbee technology, about 15 milliseconds of dormancy device activation time, and not needing to add the high-power long-range data of just realizing transmits, the transmission range length range is at 10～75 meters, add the low noise amplifier transmitting range and can reach hundreds of rice long-distance transmission data, the network equipment quantity of zigbee technology can reach 65535 equipment at most, inserts quantity than blueteeth network equipment and improves a lot.And, zigbee technological system high integration, good reliability, anti-interference and stability are strong.
Moreover using the ZigBee standard is all needing to make bigger improvement aspect device hardware and the software.
For these reasons, those skilled in the art also are not easy to expect Bluetooth technology is converted to and adopt the ZigBee standard to realize, and, use that the improvement of ZigBee standard aspect device hardware and software can realize in neither the art technology people easily.
In sum, the present invention has following advantage:
1. do not have not have between connecting line, handwriting pad and the computing machine connecting line between writing pencil of the present invention and the handwriting pad yet, use very convenient;
2. because the present invention adopts the zigbee protocol stack, and system architecture is simple, and cost is low, very flexible on using, and equipment power dissipation is very little, normally operation under the situation that equipment can not charge for a long time;
3. the new slave of the present invention networks about 30 milliseconds of time, and the networking time is short.About 8-20 millisecond of dormancy device activation time, equipment is short release time to duty from dormant state;
4. the effective transmission range of the present invention is big, and transmission range is long, does not need to add the high-power long-range data of just realizing and transmits, and can reach 10～70 meters as the indoor transmissions distance;
5. the present invention adopts many-one Star Network connected mode, and the device address is location longways, so the quantity that single network equipment inserts can reach 65535 equipment at most, can solve the network of many equipment handwriting input operation;
6. radio-frequency antenna of the present invention adopts F type antenna, non-directional reception and send data, and have and transmit receiving efficiency and simple structure preferably;
7. the present invention adopts international public frequency range 2.4G wireless communication technique, system's high integration, and good reliability, anti-interference and stability are strong.
The present invention can be used for numerous general or special purpose computingasystem environment or configuration.For example: personal computer, server computer, handheld device or portable set, plate equipment, multicomputer system, system, programmable consumer-elcetronics devices, network PC, small-size computer, mainframe computer or the like based on microprocessor.
More than a kind of hand input device provided by the present invention is described in detail, used specific case herein principle of the present invention and embodiment are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (10)
1, a kind of hand input device is characterized in that, described hand input device is connected with computer radio, and described hand input device comprises:
The handwriting pad of wireless connections and writing pencil comprise the antiresonant circuit of the usefulness of powering in the described writing pencil;
The radio-frequency (RF) transmitter that is connected with described handwriting pad, and, the radio frequency receiver that is connected with described computing machine;
Wherein, described handwriting pad receives user's hand-written data information, by described radio-frequency (RF) transmitter described hand-written data information is sent to corresponding radio frequency receiver, and described radio frequency receiver sends described hand-written data information to computing machine.
2, device as claimed in claim 1 is characterized in that, described radio-frequency (RF) transmitter comprises: handwriting pad communication interface, radio frequency send processor of single chip computer, radio frequency sending module and radio frequency transmitting antenna; Described radio frequency receiver comprises: radio frequency receiving antenna, Receiver Module, radio frequency receive processor of single chip computer and Computer Communications Interface;
Wherein, described handwriting pad is sent to radio frequency with the hand-written data information that receives by described handwriting pad communication interface and sends processor of single chip computer; After described radio frequency transmission processor of single chip computer carries out encoding process based on the zigbee standard to described hand-written data information, be sent to corresponding radio frequency receiver by described radio frequency sending module and radio frequency transmitting antenna;
Described radio frequency receiving antenna and Receiver Module receive the hand-written data information that described radio-frequency (RF) transmitter sends, and are sent to radio frequency reception processor of single chip computer; Described radio frequency receives processor of single chip computer based on the zigbee standard described hand-written data information is carried out correspondingly decoding processing after, be passed to computing machine by described Computer Communications Interface.
3, device as claimed in claim 2 is characterized in that, described radio frequency sending module and radio frequency transmitting antenna are sent to corresponding radio frequency receiver with the 2.4Ghz frequency band with described hand-written data information; Described radio frequency receiving antenna and Receiver Module receive described hand-written data information by the 2.4Ghz frequency band.
4, device as claimed in claim 3 is characterized in that, described handwriting pad communication interface is serial communication interface or SPI interface; Described Computer Communications Interface is a USB interface.
5, device as claimed in claim 4 is characterized in that, described radio-frequency (RF) transmitter has unique address information, and described address information is related with the handwriting pad that described radio-frequency (RF) transmitter connects.
6, device as claimed in claim 5 is characterized in that, described computing machine comprises:
Zigbee agreement control module is used under the control of Zigbee protocol stack, sets up being connected of a plurality of handwriting pads and computing machine according to the address information of described handwriting pad association.
7, device as claimed in claim 6 is characterized in that, described computing machine also comprises:
Display module is used for showing according to the hand-written data information that described radio frequency receiver transmits.
8, device as claimed in claim 7 is characterized in that, described radio-frequency (RF) transmitter is arranged in the handwriting pad.
9, device as claimed in claim 8 is characterized in that, described radio frequency transmitting antenna and radio frequency receiving antenna are F type antenna.
10, device as claimed in claim 9 is characterized in that, described handwriting pad is the electromagnetic induction handwriting pad, and described hand-written data information comprises handwriting coordinate data information and pressure data information.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101127004A CN101587414A (en) | 2008-05-23 | 2008-05-23 | Handwriting input device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101127004A CN101587414A (en) | 2008-05-23 | 2008-05-23 | Handwriting input device |
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| CN101587414A true CN101587414A (en) | 2009-11-25 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102169641A (en) * | 2010-12-29 | 2011-08-31 | 西安交通大学 | Digital image display equipment with interactive information inputted in a wireless way |
| CN104995586A (en) * | 2013-02-25 | 2015-10-21 | 微软科技许可有限公司 | Stylus for a digitizer system |
| CN105988916A (en) * | 2015-02-03 | 2016-10-05 | 阿里巴巴集团控股有限公司 | Method, device and system for visualizing touch point trajectory of touch-screen equipment |
-
2008
- 2008-05-23 CN CNA2008101127004A patent/CN101587414A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102169641A (en) * | 2010-12-29 | 2011-08-31 | 西安交通大学 | Digital image display equipment with interactive information inputted in a wireless way |
| CN104995586A (en) * | 2013-02-25 | 2015-10-21 | 微软科技许可有限公司 | Stylus for a digitizer system |
| US9874949B2 (en) | 2013-02-25 | 2018-01-23 | Microsoft Technology Licensing, Llc | Stylus for a digitizer system |
| CN104995586B (en) * | 2013-02-25 | 2018-11-09 | 微软科技许可有限公司 | The pen of digitization system |
| CN105988916A (en) * | 2015-02-03 | 2016-10-05 | 阿里巴巴集团控股有限公司 | Method, device and system for visualizing touch point trajectory of touch-screen equipment |
| CN105988916B (en) * | 2015-02-03 | 2019-01-08 | 阿里巴巴集团控股有限公司 | Visualization method, device and system are carried out to the touch locus of points of touch panel device |
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Application publication date: 20091125 |