CN104123644B - A kind of IC-card that can communicate with capacitance touch screen and system and method thereof - Google Patents
A kind of IC-card that can communicate with capacitance touch screen and system and method thereof Download PDFInfo
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- G06Q20/34—Payment architectures, schemes or protocols characterised by the use of specific devices or networks using cards, e.g. integrated circuit [IC] cards or magnetic cards
- G06Q20/341—Active cards, i.e. cards including their own processing means, e.g. including an IC or chip
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- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/0013—Methods or arrangements for sensing record carriers, e.g. for reading patterns by galvanic contacts, e.g. card connectors for ISO-7816 compliant smart cards or memory cards, e.g. SD card readers
- G06K7/0021—Methods or arrangements for sensing record carriers, e.g. for reading patterns by galvanic contacts, e.g. card connectors for ISO-7816 compliant smart cards or memory cards, e.g. SD card readers for reading/sensing record carriers having surface contacts
- G06K7/003—Methods or arrangements for sensing record carriers, e.g. for reading patterns by galvanic contacts, e.g. card connectors for ISO-7816 compliant smart cards or memory cards, e.g. SD card readers for reading/sensing record carriers having surface contacts means for pressing the connector contacts in the direction of the card contacts to assure trustworthy electrical connection between card and connector
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
- H04B5/20—Near-field transmission systems, e.g. inductive or capacitive transmission systems characterised by the transmission technique; characterised by the transmission medium
- H04B5/22—Capacitive coupling
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Abstract
The invention discloses a kind of IC-card that can communicate with capacitance touch screen and system and method thereof, the expection of this new method makes individual be fitted on the capacitance touch screen of mobile device by IC-card, directly and mobile device communication, thus completes IC-card transaction.IC-card is designed to contain conductive contact and optocoupler towards the one side of capacitance touch screen.Mobile device sends data by the light change that screen produces to IC-card, and IC-card is responded to by optocoupler and obtained data.IC-card sends data by what generate electric field change at conductive contact to mobile device, and electric field change is identified as and touches effect be thereupon decoded into reception data by the capacitance touch screen of mobile device.This method enables user when buying expensive reader device, by the mobile device of support capacitance touch screen at one's side, just can the IC-card of direct control the present invention proposition, and realize the functions such as card transaction, certification, reading and writing data.Expand IC-card application scenarios.
Description
Technical field
The present invention relates to online transaction field, particularly relating to system, method and IC-card that the IC-card by communicating with capacitance touch screen is concluded the business.
Background technology
In traditional commerce activity, exist in a large number based on the transaction of card.Such as done shopping in POS by credit card, debit card, prepaid card etc.Enchashment gold or carry out can be transferred accounts, refund, pay the fees, enclose and deposit, enclose operations such as proposing in ATM (automatic teller machine) (ATM) by credit card and debit card.
Existing card depends on special reader device and processes, as POS, ATM, cabinet face card reader etc.Card is read and write by magnetic stripe card interface, contact card interface, non-contact interface usually.
Along with popularizing of the mobile device being representative with iPhone and Android.Under mobile environment, on-line transaction class business is promoted on mobile phone and flat board by the mode of mobile phone A pp.As Mobile banking, mobile phone wallet, Third-party payment application etc.Because mobile phone lacks safe hardware unit built-in specially.Under these transaction generic operations are exposed to open environment, be very easily subject to security attack.In addition this kind of application depends on online account system, can not well be combined with the business based on card.
In order to meet the demand of on-line transaction under mobile environment, there is the small-sized card reader of some externals in conjunction with mobile device, having carried out the card reader communicated as by the earphone interface of mobile device or blue tooth interface.The appearance of these equipment, solves two problems.One is by card and card-reading apparatus, improves the security of online business under mobile environment.Two is that business on the card business under line and line has been done seamless integration.More convenient holder, also expands and has consolidated the market advantage of existing hair fastener tissue.But the mode of this external card reader, needs additionally to increase the cost held in one's own possession.If can by additionally not increasing the mode of equipment, just can allow mobile device direct read/write card, will larger advantage be had.
Market there is a kind of new technology, low coverage field communication (NFC).Support the mobile device of NFC technique, there is the ability of directly access card.As a kind of non-imposed configuration requirement, support that the mobile device of NFC is also more limited at present.If there is a kind of method, the special device that NFC is such can not be relied on, only need the device (as capacitance touch screen) utilizing mobile device generally to have just can read and write card, will larger advantage be had.
That is, the secure interactive mode of existing mobile device needs additional configuration hardware, and as bought expensive reader device, not only cost is high, and brings great inconvenience to popularization.
Summary of the invention
The object of the invention is to system, method and IC-card that a kind of IC-card by communicating with capacitance touch screen is concluded the business, additional configuration hardware is wanted to solve in prior art, as bought expensive reader device, not only cost is high, and brings technical matters inconvenient greatly to promoting.
Mobile device extensively adopts multi-point capacitive touch screen, touch event can be encoded into data, and this makes to become possibility by crossing capacitance touch screen to mobile phone transmission data.
By the system that IC-card communicates with capacitance touch screen, it is characterized in that, comprise mobile device, the IC-card with capacitance touch screen, wherein:
IC-card can be fitted on the capacitance touch screen of mobile device, direct and mobile device communication is concluded the business to complete IC-card, and, described IC-card contains the optocoupler converting electric signal for transmitting the conductive contact of electric field and the light signal for being sent by described capacitance touch screen to mobile device to towards the one side of capacitance touch screen
Described mobile device sends data by the light change that screen produces to IC-card, and IC-card is responded to by optocoupler and obtain data, IC-card sends data by what generate electric field change at conductiving point to mobile device, and electric field change is identified as and touches effect be thereupon decoded into reception data by the capacitance touch screen of mobile device.
Preferably, IC-card conductive layer, for the insulation course that insulate between all parts and IC-card inner structure, described conductive contact and described optocoupler are arranged on described insulation course, and described IC-card inner structure comprises further: IC card chip: for completing card function; Modulation/demodulation circuit: be arranged between described IC card chip and described conductive contact, the data for IC card chip being sent carry out modulating and being sent to conductive contact; And be arranged between IC card chip and described optocoupler, for the data of optocoupler are sent to described IC card chip by demodulation mode.
Preferably, IC-card also comprises power supply, and described power supply connects optocoupler, for providing electric power when IC-card and mobile device carry out bidirectional data communication to described IC-card.
Preferably, IC-card also comprises the IC-card coil be arranged in IC-card inner structure, to complete the contactless communication of IC-card and peripheral hardware.
Preferably, IC-card also comprises the IC-card contact being arranged on insulation course, and described IC-card contact exposes to described insulation course, can by described reader device physics and relay contacts.
Preferably, IC-card one surface structure arranges the regional graphics mark being used for reminding user and needing when operation sheet to be placed in mark region within the scope of capacitance touch screen, and its opposite arranges its multiple described conductive contact and multiple optocoupler in pattern identification vertical projection corresponding region.
Preferably, conductive contact has n group, and often organizing quantity is be equal to the maximum touch that capacitance touch screen supports usually to count, to support that (n+1) scale coding data send.
Preferably, optocoupler is configured for the optical filter of anti-interference and anti-different colours of disturbing mutually.
Preferably, mobile device comprises further: the capacitive sensing point dynamically produced in the course of the work and luminous point, decoding/encoding engine, described decoding/encoding engine is corresponding with modulation/demodulation circuit, jointly to complete the data transmission between IC-card and mobile device.
A kind of IC-card and capacitance touch screen communication means, comprise the following steps:
IC-card is fitted on the capacitance touch screen of mobile device, direct and mobile device communication is concluded the business to complete IC-card, and, described IC-card contains the optocoupler converting electric signal for transmitting the conductive contact of electric field and the light signal for being sent by described capacitance touch screen to mobile device to towards the one side of capacitance touch screen
Described mobile device sends data by the light change that screen produces to IC-card, and IC-card is responded to by optocoupler and obtain data, IC-card sends data by what generate electric field change at conductiving point to mobile device, and electric field change is identified as and touches effect be thereupon decoded into reception data by the capacitance touch screen of mobile device.
IC-card obtains screen location by the conductive contact giving tacit consent to conducting: when card fits to screen and starts working, mobile device accurately knows the position of conductive contact and light idol on IC-card, to set up data input and data output passage in the screen position of correspondence.
IC-card is after initial placement to screen area, by at least three conductive contacts of acquiescence conducting human body, line is carried out in the touch point sensed by the Decode engine of mobile device, and the IC-card conductive contact distribution plan of line shapes and storage is in advance mated, as coupling, then record the current conductive contact position sensed, and calculate other non-default conducting conductive contacts and the even position of light further.
The method also comprises:
IC-card power supply acquiescence is closed, and selects the mode of opening to activate unlatching by the even interval of light.
IC-card, by modulation circuit, generates electric field change at conductive contact, to send data to mobile device, modulation has two kinds of modes, passive capacitive way and initiatively capacitive way:
Under passive capacitive way, modulation circuit by being switched on or switched off the path of conductive contact to human body, thus makes mobile device it is identified as " touch "/" non-tactile " event;
Initiatively under capacitive way, modulation circuit can by the touch-screen sweep signal of pre-sampling, send in active mode or stop sending conductive contact is anti-phase, this will weaken or stop weakening the collection electric capacity of touch-screen sweep circuit, thus make mobile device be identified as " touch "/" non-tactile " event
Further decoded engine decodes is " 1 "/" 0 " bit sequence of data by " touch "/" non-tactile " sequence of events continued more than produced by modulation.
In card process of exchange, require that operator keeps pointing and the contact of card, which avoid operator when being absent from the scene, card is fitted in unintentionally mobile device surface, by wooden horse carry out long-range abduction may.
Its method may be used for the online authentication of holder, card legitimate verification, circle are deposited, enclose carry, online consumption, transfer accounts, digital signature of concluding the business, card data online updating be at interior transaction use.
A kind of IC-card, it is characterized in that: IC-card can be fitted on the capacitance touch screen of mobile device, direct and mobile device communication is concluded the business to complete IC-card, IC-card comprises conductive layer, for the insulation course that insulate between all parts and IC-card inner structure, described conductive contact and described optocoupler are arranged on described insulation course
Described IC-card contains the optocoupler converting electric signal for transmitting the conductive contact of electric field and the light signal for being sent by described capacitance touch screen to mobile device to towards the one side of capacitance touch screen;
IC card chip: for completing IC-card function;
Modulation/demodulation circuit: be arranged between described IC card chip and described conductive contact, the data for IC card chip being sent carry out modulating and being sent to conductive contact; And be arranged between IC card chip and described optocoupler, for the data of optocoupler are sent to described IC card chip by demodulation mode.
Compared with prior art, the present invention does not need the extra reader device buying costliness can realize IC-card Secure Transaction, and cost is low, and has extremely strong extendability.
The restriction that the above-mentioned example of association area is relevant with it is intended to make illustrative be not exclusiveness.When reading instructions and research accompanying drawing, other restrictions of association area will become clear.
Accompanying drawing explanation
Fig. 1 illustrates that the IC-card by communicating with capacitance touch screen carries out the example of the system schematic of on-line transaction;
Fig. 2 illustrates the example of IC-card internal part schematic diagram;
Fig. 3 (a)-Fig. 3 (b) illustrates the example of IC-card external structure schematic diagram;
Fig. 4 (a)-Fig. 4 (b) illustrates the example making user correctly IC-card is placed on screen operator region;
Under Fig. 5 (a)-Fig. 5 (b) illustrates passive capacitive way, IC-card sends the example of the schematic diagram of signal to capacitance touch screen by conductive contact;
Under Fig. 6 (a)-Fig. 6 (c) illustrates active capacitive way, IC-card sends the example of the schematic diagram of signal to capacitance touch screen by conductive contact;
Fig. 7 (a)-Fig. 7 (b) illustrates that mobile device sends the example of data to IC-card by luminous point on screen;
Fig. 8 (a)-Fig. 8 (b) illustrates that IC-card passes through to give tacit consent to the example of the conductive contact acquisition screen location of conducting;
Fig. 9 illustrates that mobile device starts the example of IC-card power supply by certain optical signals;
Figure 10 illustrates that IC-card is fitted screen before transaction starts, and obtains the example of the flow process of location and electric power starting;
Figure 11 (a)-Figure 11 (b) illustrates the mode by n scale coding (n>2), improves the example that IC-card sends data rate;
Figure 12 (a)-Figure 12 (h) illustrates that the example of transaction flow deposited by IC-card electronic cash circle;
Embodiment
In the accompanying drawings, method exemplarily instead of as restriction illustrates, element like Reference numeral representation class similar in accompanying drawing.It should be noted that the present invention open in " one " that quotes or " some " embodiments not necessarily refer to identical embodiment, this application means at least one.
Propose a kind of new method, the expection of this new method makes individual be fitted on the capacitance touch screen of mobile device by IC-card, direct and mobile device communication, thus completes the system and method for IC-card transaction.IC-card is designed to contain conductive contact and optocoupler towards the one side of capacitance touch screen.Mobile device sends data by the light change that screen produces to IC-card, and IC-card is responded to by optocoupler and obtained data.IC-card sends data by what generate electric field change at conductive contact to mobile device, and electric field change is identified as and touches effect and be decoded into reception data thereupon by the capacitance touch screen of mobile device.This method enables user when buying expensive reader device, by the mobile device of support capacitance touch screen at one's side, just can the IC-card of direct control the present invention proposition, and realize the functions such as card transaction, certification, reading and writing data.Expand IC-card application scenarios.
Fig. 1 illustrates that the IC-card by communicating with capacitance touch screen carries out the example of the system schematic of on-line transaction.Although multiple parts are shown in and are functionally separated by schematic diagram, this diagram is only for illustration of purposes.Clearly, the parts described in this figure can combination in any or be divided into software, firmware and/or the hardware component of separation.And in any case be further appreciated that combination or divide these parts, these parts can both perform on same main frame or multiple main frame, and wherein multiple main frame can be connected by one or more network.
In the example of Fig. 1, system includes IC-card 10, and IC card chip 17, modulation circuit 13, demodulator circuit 14, conductive contact 16 and optocoupler 15 that IC-card 10 comprises; Further comprises mobile device 100, and the capacitive sensing point 111 that dynamically produces in the course of the work of the mobile device capacitance touch screen 110, the capacitance touch screen 110 that have and luminous point 112, Decode engine 121, coding engine 122, transaction engine 130; Trading host 140 can also be comprised.
Term " engine " described here refers to software, firmware, hardware or is used for realizing the miscellaneous part of certain object.Engine usually can comprise and is stored in software instruction in nonvolatile memory (also referred to as external memory).When executed, processor being contained in software instruction at least partially in storer (also referred to as primary memory).Then the software instruction in processor execute store.Processor can be the combination of common processor, application specific processor or common processor and application specific processor.Common program comprises calling hardware component (such as I/O equipment).This needs to perform driver usually.Driver can think the part of yes or no engine, but this difference is unimportant.
Term used herein " trading host ", wide in range being used for comprises the main process equipment for carrying out the purposes such as on-line transaction and relevant certification, inquiry, data syn-chronization and transaction system software." trading host " can have one or more, can have two-node cluster hot backup or load balancing.Trading host can carry or outside connection transaction data base.Trading host generally by by fire wall, router, indirectly obtains long-range connection with mobile device 100.
In the example of Fig. 1, the mutual mobile device 100 of IC-card 10 can be but be not limited to wherein said mobile device to be the mobile phone with capacitive touch screen, comprise: the Android device of apple iPhone, apple iPod, apple iPad, apple iTouch, Google, the mobile device of windows, the mobile device of blackberry, blueberry, or the mobile device of other operating systems.And comprise at least with having capacitance touch screen 110, carry out when needed decoding and encoding, exchange information with the accounts information of authentication of users with trading host, perform transaction and software, firmware, hardware or other any other portable electric appts of combining mutual with card.The typical component of mobile device 100 can include but not limited to permanent memory (such as flash ROM), random access memory (such as SRAM), camera, battery, lcd driver, capacitance touch screen, cellular antenna, loudspeaker, Bluetooth circuit and WIFI circuit.Wherein permanent memory can comprise the program of mobile device, application program and/or operating system.
Equally, the one that IC-card can be financial IC card, public transport IC-card, Stored Value IC-card, safety certification IC-card, identity ID card, data store IC-card or other types IC-card.Further, IC-card, its size can be designed to identical with standard IC-card, also can be different.In addition, IC-card can also increase magnetic stripe, so that at traditional card-reading apparatus, as the equipment such as desk-top card reader, self-help teller machine, ATM accept.
That is, an IC-card, it can comprise:
Housing, for encapsulating each part and circuit in IC-card.Housing includes conductive layer (upper surface), insulation course (lower surface and side) and IC-card inner structure.IC-card inner structure mainly refers to the structure be encapsulated in it.IC-card inner structure can comprise IC card chip, IC-card coil, power supply.IC-card contact, conductive contact and optocoupler 15 (these structures highlight in rear extended meeting, existing only simple declaration) is comprised in insulation course.Wherein:
IC-card coil, if IC-card has contactless communication interface, then has this parts.If IC-card is contact communication, then can there is no IC-card coil.
IC card chip, refers to be encapsulated in IC-card inside, completes the chip of IC-card card function, from the angle that built-in function divides, generally includes transaction modules 171, I/O module 172, processor module 173, key module 174, memory module 175.Wherein transaction modules for complete card certification, consume, supplement with money, enclose deposit, enclose carry, the business such as encryption and decryption, digital signature.Transaction modules can be realized by logical circuit, also can by operating in card operating system (COS) on processor module and card application software realizes.
Modulation/demodulation circuit, for carrying out data transmit-receive and encoding and decoding process between IC-card and mobile device.
Power supply, when IC-card and mobile device carry out bidirectional data communication, provides power supply to IC-card.
IC-card contact, if when IC-card has contact communication interface, then have these parts.IC-card contact exposes to insulation course, can by reader device physics and relay contacts.
Conductive contact, transmits electric field for modulation-demodulation circuit to mobile device.Conductive contact exposes to insulation course.
Optocoupler 15, converts electric signal to for the light signal sent by mobile device screen.Optocoupler exposes to insulation course, directly can perceive external light source.Further, optocoupler 15 can be photoresistance, photodiode, phototriode, also can be cmos image sensor or ccd image sensor, or the Combination application of above-mentioned device.
IC-card can communicate with system by existing industry standard, comprise: carry out contact card interface communications by standards such as ISO7816, or the standard such as ISO14443, ISO15693, ISO18000 carries out non-contact card interface communications, or ISO7811 standard carries out magnetic stripe card interface communications.Under normal communications mode, need corresponding card-reading apparatus.
IC-card can also be set to screen communication pattern, and it refers to that IC-card can be communicated by the capacitance touch screen of mobile device, does not need special card-reading apparatus.Require that user points the continuous contact kept with IC-card in communication process.This requirement serves the effect allowing user confirm sth. oneself to current business.Can avoid user not when business scene, IC-card business is kidnapped by hacker's behaviors such as wooden horses.
At screen communication pattern, IC-card in a non-operative state, can be given tacit consent to conducting and be no less than three conductive contacts.After when application software prompting, IC-card fits to screen by user, mobile device can by sense that the dead reckoning of conductive contact goes out profile and the position of IC-card.And the location, position automatically completed IC-card optocoupler or other non-conducting conductive contacts, for subsequent communication is ready.Further, screen communication pattern, in order to adapt to the lower traffic rate under screen communication pattern, IC-card can provide a set of proprietary on-line transaction instruction set, reduces amount of communication data.
Embodiment:
Below illustrate IC-card and concrete communication mode thereof.
Fig. 2 illustrates and includes the inner structure that the IC-card 10 that can communicate with capacitance touch screen has: conductive layer 11, insulation course 12, modulation circuit 13, demodulator circuit 14, optocoupler 15, conductive contact 16, IC card chip 17, battery 18.In addition in order to the traditional IC-card of compatibility, the IC-card contact 20 meeting ISO7816 specification can be matched, also can match the IC-card inductive coil 19 meeting ISO14443 or ISO15693 specification.
Conductive layer 11 shown in Fig. 2, with in capacitance touch screen communication process, screen dorsad, towards holder.Conducting medium can cover whole card upper surface, also can be regional area.When adopting the mode of regional area conduction, certain area identification should be had, to remind holder, finger and this region are kept in touch.
Insulation course 12 shown in Fig. 2, with in capacitance touch screen communication process, towards screen, holder dorsad.Insulation course 12 for the protection of card, and for optocoupler 15, conductive contact 16 and IC-card contact 20 are isolated.Further illustrate insulation course 12, make IC-card contact 20 (if existence), between conductive contact 16, optocoupler 15, keep insulation.When conductive contact 16 is more than one, between conductive contact 16, also keep insulation.
Modulation circuit 13 shown in Fig. 2, modulates for data IC card chip 17 sent, and is sent on conductive contact 16.Modulation circuit can adopt passive capacitive way, see Fig. 5 (a)-Fig. 5 (b).Also initiatively capacitive way can be adopted, see Fig. 6 (a)-Fig. 6 (c).
Demodulator circuit 14 shown in Fig. 2, for by optocoupler 15 on the electric signal that send carry out shaping and decoding.And be transmitted to IC card chip 17.See Fig. 7 (a)-Fig. 7 (b).
Optocoupler 15 shown in Fig. 2, can have color filter, by filtering non-designated color light, improves anti-interference.Optocoupler can have multiple, to improve the speed that card receives data.
Optocoupler 15 shown in Fig. 2 can be photoresistance, photodiode, phototriode, also can be cmos image sensor or ccd image sensor, or the combination of above-mentioned material.
Conductive contact 16 shown in Fig. 2, for transmitting electric field signal change to capacitance touch screen.Conductive contact 16 can make by injected plastics material by metal or permeable conductive medium.Conductive contact 16 can have multiple, to improve the speed that card sends data.
IC card chip 17 shown in Fig. 2, for completing IC-card trading function.General employing meets ISO7816 and ISO14443 specification, or other industry specification, as the IC card chip of EMV specification, PBOC specification.Typical IC card chip includes FLASH, processor, secret key safety module, coprocessor, IO communication, clock, randomizer etc. on hardware; Built-in card operating system (COS), card application on software.IC card chip also when individualized, can load personal data.
Power supply 18 shown in Fig. 2, includes battery and power control circuit.Power supply 18 by the unblanking of feature, can enter into opening.And return closed condition when can not receive signal within a certain period of time.Control by carrying out unlatching from the electric signal of optocoupler 15 to power supply 18 in this patent.
Fig. 3 (a)-Fig. 3 (b) shows the Typical external structure that the IC-card 10 that can carry out communicating with capacitance touch screen has.Fig. 3 (a) is IC-card 10 upper surface (towards holder) structure, and regional graphics mark 30, needs mark 30 region to be placed within the scope of capacitance touch screen when operation sheet for reminding user.Fig. 3 (b) is IC-card lower surface (towards capacitance touch screen) structure.Multiple conductive contact 16 and multiple optocoupler 15, be in region corresponding to pattern identification 30 vertical projection.This realization example adopts circular layout to mark 30, but does not limit other geometric layout, as rectangle, polygon or non-regular shape etc.
Fig. 4 (a)-Fig. 4 (b) shows the example making user correctly IC-card is placed on screen operator region.No matter card is placed in the capacitance touch screen surface of mobile device 100 with which kind of Plane intersects angle by operator, as long as mark 30 is in screen area, card just can normally work.
Under Fig. 5 (a)-Fig. 5 (b) illustrates passive capacitive way, IC-card 10 sends the example of the schematic diagram of signal to capacitance touch screen by conductive contact 16; Under passive capacitive way, modulation circuit 13 controls the break-make of human body electric field to conductive contact 16 by relay 131, ' 0 ' to disconnect presentation logic, ' 1 ' to connect presentation logic.
Fig. 5 (a) shows IC-card 10 and send logical signal under passive capacitive way ' 0 '.Now, relay device 131 disconnects.Human body electric field connects with the electrical equipment of conductive contact 16 and disconnects.The high-frequency driving signal that capacitance plate horizontal scanning line 116 sends will mainly be received by capacitance plate column scan line 115.It is Cx=Cp that the scanning of capacitance touch screen obtains electric capacity.Cp is the mutual coupling capacitance of sweep trace.Now, touch-screen sweep circuit can be identified as " non-tactile " state, and this state decode is logical signal ' 0 ' by Decode engine.
Fig. 5 (b) shows IC-card 10 and send logical signal under passive capacitive way ' 1 '.Now, relay device 131 is connected.Human body electric field connects conducting with the electrical equipment of conductive contact 16.A part is received by capacitance plate column scan line 115 by the high-frequency driving signal that capacitance plate horizontal scanning line 116 sends, and a part is shunted by human body and absorbed, and it is Cx '=Cp-Ci that the scanning of capacitance touch screen obtains electric capacity.Ci is human body equivalent capacity amount.Now, because the residual quantity of Cx ' and Cx, touch-screen sweep circuit can be identified as " touch " state, and this state decode is logical signal ' 1 ' by Decode engine.
The passive capacitive way that Fig. 5 (a)-(b) adopts, needs by body effect.And contact region needs a certain size area.This, to raising conductive contact density, increases conductive contact quantity and brings certain difficulty.Therefore also can to take the initiative capacitive way.
Under Fig. 6 (a)-Fig. 6 (c) illustrates active capacitive way, IC-card 10 sends the example of the schematic diagram of signal to capacitance touch screen by conductive contact 16; Under active capacitive way, modulation circuit 13 has sample circuit 132, frequency locking circuit 133 and anti-phase driving circuit 134.Sample circuit 132 carries out signal coupling and sampling (AD conversion) from conductive contact 16.The signal that frequency locking circuit 133 analytical sampling circuit 132 transmits, line frequency of going forward side by side analysis and recovery (DA conversion), send the signal of same frequency to anti-phase driving circuit 134.The signal that anti-phase driving circuit 134 pairs of frequency locking circuit are sent carries out anti-phase and amplifies process, and is sent to conductive contact 16.
Fig. 6 (a) shows IC-card 10 and send logical signal under active capacitive way ' 0 '.Now, modulation circuit 13 is in silent status.Conductive contact 16 can not form electric field influence to capacitance touch screen.The high-frequency driving signal that capacitance plate horizontal scanning line 116 sends will mainly be received by capacitance plate column scan line 115.It is Cx=Cp that the scanning of capacitance touch screen obtains electric capacity.Cp is the mutual coupling capacitance of sweep trace.Now, touch-screen sweep circuit can be identified as " non-tactile " state, this state decode is become logical signal by Decode engine ' 0 '
Fig. 6 (b)-Fig. 6 (c) shows IC-card 10 and send logical signal under active capacitive way ' 1 '.Now, modulation circuit 13 is in running order.In the t0 moment, the high-frequency driving signal that capacitance plate horizontal scanning line 116 sends is sampled circuit 132 by conductive contact 16 and samples, in the t1 moment, the frequency analysis of frequency locking circuit 133 settling signal, sample circuit cuts out, and anti-phase driving circuit 134 sends the electric field signal anti-phase with sweep signal to conductive contact.It is weakened that capacitance plate column scan line 115 obtains signal.It is Cx '=Cp-Ca that the scanning of capacitance touch screen obtains electric capacity.Ca is the negative electric field electric capacity that anti-phase driving circuit causes.Now, because the residual quantity of Cx ' and Cx, touch-screen sweep circuit can be identified as " touch " state, and it is logical signal ' 1 ' that Decode engine will change state decode.
For the modulation circuit of active capacitive way, the frequency due to the driving sweep signal with a capacitance touch screen curtain is always fixed, therefore in order to reduce costs.Only can be equipped with a road sample circuit and a road frequency locking circuit on a conductive contact.All the other conductive contacts adopt simpler trigger circuit to carry out alternative sample circuit, and share unique frequency locking circuit signal.
Fig. 7 (a)-Fig. 7 (b) illustrates that mobile device sends the example of data to IC-card 10.The demodulator circuit 14 of IC-card 10 receives electric signal from light even 15, and is decoded into serial bitstream data and sends to IC card chip.Modulation circuit 14 includes shaping circuit 141 and shift register 142.Realizing the shared shift register of the multiple shaping circuit of multiple smooth even summations in example.
Fig. 7 (a) illustrates that mobile device sends logical signal ' 0 '.Now, mobile device, at the luminous point 112 of corresponding light even 15, keeps respective pixel in " black " state.Light is even does not sense light, does not carry out opto-electronic conversion, shaping circuit 141 is sent ' 0 ' level, and being cushioned by shift register is a signal, and sends to IC card chip by serial sequential order.
Fig. 7 (b) illustrates that mobile device sends logical signal ' 1 '.Now, mobile device, at the luminous point 112 of corresponding light even 15, keeps respective pixel in " coloured " luminance.The optical filter solid colour of emitted light color and light idol.Light is suddenly felt required light, carries out opto-electronic conversion, shaping circuit 141 is sent ' 1 ' level, and being cushioned by shift register is a signal, and sends to IC card chip by serial sequential order.
What more than provide is that the one of IC-card and capacitance touch screen realizes data communication mode, but is only the use of citing, not limited thereto.
Fig. 8 (a)-Fig. 8 (b) illustrates that IC-card passes through to give tacit consent to the example of the conductive contact acquisition screen location of conducting.When card fits to screen and starts working, mobile device needs the position knowing conductive contact and light idol on IC-card accurately, to set up data input and data output passage in the screen position of correspondence.
Fig. 8 (a) illustrates the multiple conductive contact of conducting 16 to the conductive layer 11 that IC-card 10 is always given tacit consent to.No matter be passive capacitive way or active capacitive way.
Fig. 8 (b) illustrates that IC-card 10 is after initial placement to screen area.By multiple conductive contacts of acquiescence conducting human body, line is carried out in the touch point sensed by the Decode engine of mobile device, and is mated by the IC-card conductive contact distribution plan of line shapes and storage in advance.As coupling, then record the current conductive contact position sensed, and calculate other non-default conducting conductive contacts and the even position of light further.
In order to reduce card power consumption.IC-card power supply acquiescence is closed.Need to activate unlatching by specific signal.This realization example uses up activating of random thoughts induction signal.In order to avoid misoperation, except by except optical filter and particular color light, this realization example have employed the mode that the even interval of light is selected to open further.Fig. 9 illustrates that mobile device is at adjacent luminous point a ', b ', c ', d '.Signal is sent at even a, b, c, the d interval of light to correspondence.Power switch circuit carries out logic identification in advance by phase inverter with door.This avoid the outside high light indifference that may exist to open by mistake and open.
What Figure 10 was complete describe IC-card fits before transaction starts screen, obtains the example of the flow process of location and electric power starting
Figure 11 (a)-Figure 11 (b) illustrates the mode by n scale coding (n>2), improves the example that IC-card sends data rate.For capacitance touch screen, the maximum touch-control T that counts is fixing, current more commonly 5 points, T=5.But still can increase conductive contact number S, make S>T.As long as the induction trigger pip that control IC-card sends is no more than T simultaneously.This means to divide into groups to conductive contact, often the corresponding data bit of group.For S=n*T.Transfer encoding is (n+1) system.
When Figure 11 (a) illustrates n=3, the coded system of individual data position.Now every 3 conductive contacts are encoded to 1 data bit.Simultaneously can only conducting 0 or 1 conductive contact, therefore can obtain 0,1,2,3 three position coding, realize 4 binary data positions.As different realizations example, 3 systems, 5 systems or other scale coding modes also can be selected.
Figure 11 (b) illustrates S=n*T, the situation of n=3, T=5.Now amount to 15 conductive contacts, there are 5 quaternary positions, be equivalent to 10 binary digits.Can once transmit more than 1 byte (8 binary digits) data.Coding demonstration has been done with sexadecimal number 3A5 in example.
Figure 12 (a)-Figure 12 (h) illustrates that the example of transaction flow deposited by IC-card electronic cash circle, and this example is concluded the business for other, as circle carry, online consumption, transfer accounts, online certification etc. also has reference significance.
Figure 12 (a) illustrates that system is deposited before transaction starts at circle, first points out user to input dealing money.Figure 12 (b) illustrates that system points out user to input password thereupon.Figure 12 (c) illustrates that card is fitted to screen appointed area by system prompts user.Figure 12 (d) illustrates that system obtains and locates card.Figure 12 (e) illustrates that system carries out certification to card, and certification here can be undertaken by symmetric key or unsymmetrical key.Except the certification to card, this step has also carried out the certification to password, and user cipher is encrypted by card and after digital signature, is transmitted back to trading host.Figure 12 (f) illustrates that card is attacked to prevent fishing website and fishing application the certification of system, and certification here can be undertaken by symmetric key or unsymmetrical key.After Figure 12 (g) illustrates that various certification is passed through, card starts to upgrade electronic cash off line remaining sum.After Figure 12 (h) illustrates that transaction completes, remaining sum after system display transaction also points out user to remove card.
The disclosed preferred embodiment of the present invention just sets forth the present invention for helping above.Preferred embodiment does not have all details of detailed descriptionthe, does not limit the embodiment that this invention is only described yet.Obviously, according to the content of this instructions, can make many modifications and variations.This instructions is chosen and is specifically described these embodiments, is to explain principle of the present invention and practical application better, thus makes art technician understand well and to utilize the present invention.The present invention is only subject to the restriction of claims and four corner and equivalent.
Claims (18)
1. by the system that IC-card communicates with capacitance touch screen, it is characterized in that, comprise mobile device, the IC-card with capacitance touch screen, wherein:
IC-card can be fitted on the capacitance touch screen of mobile device, direct and mobile device communication is concluded the business to complete IC-card, and, described IC-card contains the optocoupler converting electric signal for transmitting the conductive contact of electric field and the light signal for being sent by described capacitance touch screen to mobile device to towards the one side of capacitance touch screen, described mobile device sends data by the light change that screen produces to IC-card, and IC-card is responded to by optocoupler and obtain data, IC-card sends data by the electric field change generated at conductive contact to mobile device, and electric field change is identified as touch effect and is decoded into reception data by the capacitance touch screen of mobile device thereupon, described mobile device comprises further: the capacitive sensing point dynamically produced in the course of the work and luminous point, decoding/encoding engine, described decoding/encoding engine is corresponding with a modulation/demodulation circuit, jointly to complete the data transmission between IC-card and mobile device,
IC-card also for:
By modulation circuit, generate electric field change at conductive contact, to send data to mobile device, modulation has two kinds of modes, passive capacitive way and initiatively capacitive way:
Under passive capacitive way, modulation circuit by being switched on or switched off the path of conductive contact to human body, thus makes mobile device it is identified as " touch "/" non-tactile " event;
Initiatively under capacitive way, modulation circuit can by the touch-screen sweep signal of pre-sampling, send in active mode or stop sending conductive contact is anti-phase, this will weaken or stop weakening the collection electric capacity of touch-screen sweep circuit, thus makes mobile device be identified as " touch "/" non-tactile " event.
2. the system as claimed in claim 1, is characterized in that, IC-card conductive layer, for the insulation course that insulate between all parts and IC-card inner structure, described conductive contact and described optocoupler are arranged on described insulation course, and described IC-card inner structure comprises further:
IC card chip: for completing card function;
Described modulation/demodulation circuit: be arranged between described IC card chip and described conductive contact, the data for IC card chip being sent carry out modulating and being sent to conductive contact; And be arranged between IC card chip and described optocoupler, for the data of optocoupler are sent to described IC card chip by demodulation mode.
3. system as claimed in claim 2, it is characterized in that, IC-card also comprises power supply, described power supply connects optocoupler, for providing electric power when IC-card and mobile device carry out bidirectional data communication to described IC-card, power supply can be rechargeable battery, disposable battery, also can be photovoltaic cell.
4. system as claimed in claim 2 or claim 3, it is characterized in that, IC-card also comprises the IC-card coil be arranged in IC-card inner structure, to complete the contactless communication of IC-card and peripheral hardware.
5. system as claimed in claim 2 or claim 3, it is characterized in that, IC-card also comprises the IC-card contact being arranged on insulation course, and described IC-card contact exposes to described insulation course, can by reader device physics and relay contacts.
6. system as claimed in claim 2 or claim 3, it is characterized in that, IC-card one surface structure arranges the regional graphics mark being used for reminding user and needing when operation sheet to be placed in mark region within the scope of capacitance touch screen, and its opposite arranges its multiple described conductive contact and multiple optocoupler in pattern identification vertical projection corresponding region.
7. system as claimed in claim 1 or 2, it is characterized in that, conductive contact has n group, and often organizing quantity is be equal to the maximum touch that capacitance touch screen supports usually to count, to support that (n+1) scale coding data send.
8. system as claimed in claim 1 or 2, it is characterized in that, optocoupler is configured for the optical filter of anti-interference and anti-different colours of disturbing mutually.
9. IC-card and a capacitance touch screen communication means, is characterized in that: comprise the following steps:
IC-card is fitted on the capacitance touch screen of mobile device, direct and mobile device communication is concluded the business to complete IC-card, and, described IC-card contains the optocoupler converting electric signal for transmitting the conductive contact of electric field and the light signal for being sent by described capacitance touch screen to mobile device to towards the one side of capacitance touch screen, described mobile device sends data by the light change that screen produces to IC-card, and IC-card is responded to by optocoupler and obtain data, IC-card by conductive contact generate electric field change to mobile device send data, and electric field change is identified as touch effect and is decoded into reception data by the capacitance touch screen of mobile device thereupon,
IC-card, by modulation circuit, generates electric field change at conductive contact, to send data to mobile device, modulation has two kinds of modes, passive capacitive way and initiatively capacitive way:
Under passive capacitive way, modulation circuit by being switched on or switched off the path of conductive contact to human body, thus makes mobile device it is identified as " touch "/" non-tactile " event;
Initiatively under capacitive way, modulation circuit can by the touch-screen sweep signal of pre-sampling, send in active mode or stop sending conductive contact is anti-phase, this will weaken or stop weakening the collection electric capacity of touch-screen sweep circuit, thus makes mobile device be identified as " touch "/" non-tactile " event.
10. method as claimed in claim 9, is characterized in that, also comprise:
IC-card obtains screen location by the conductive contact giving tacit consent to conducting: when card fits to screen and starts working, mobile device accurately knows the position of conductive contact and light idol on IC-card, to set up data input and data output passage in the screen position of correspondence.
11. methods as claimed in claim 10, it is characterized in that, it comprises further:
IC-card is after initial placement to screen area, by at least three conductive contacts of acquiescence conducting human body, line is carried out in the touch point sensed by the Decode engine of mobile device, and the IC-card conductive contact distribution plan of line shapes and storage is in advance mated, as coupling, then record the current conductive contact position sensed, and calculate other non-default conducting conductive contacts and the even position of light further.
12. methods as claimed in claim 10, it is characterized in that, it also comprises:
IC-card power supply acquiescence is closed, and selects the mode of opening to activate unlatching by the even interval of light.
13. methods as claimed in claim 10, is characterized in that, further decoded engine decodes is " 1 "/" 0 " bit sequence of data by described " touch "/" non-tactile " sequence of events continued produced by modulation.
14. methods as claimed in claim 13, it is characterized in that, it comprises further:
In card process of exchange, require that operator keeps pointing and the contact of card, which avoid operator when being absent from the scene, card is fitted in unintentionally mobile device surface, by wooden horse carry out long-range abduction may.
15. methods as claimed in claim 13, its method may be used for the online authentication of holder, card legitimate verification, circle are deposited, enclose carry, online consumption, transfer accounts, digital signature of concluding the business, card data online updating be at interior transaction use.
16. 1 kinds of IC-cards, it is characterized in that: IC-card can be fitted on the capacitance touch screen of mobile device, direct and mobile device communication is concluded the business to complete IC-card, IC-card comprises conductive layer, for the insulation course that insulate between all parts and IC-card inner structure, described conductive contact and optocoupler are arranged on described insulation course, and described IC-card contains the optocoupler converting electric signal for transmitting the conductive contact of electric field and the light signal for being sent by described capacitance touch screen to mobile device to towards the one side of capacitance touch screen;
IC card chip: for completing IC-card function;
Modulation/demodulation circuit: be arranged between described IC card chip and described conductive contact, the data for IC card chip being sent carry out modulating and being sent to conductive contact; And be arranged between IC card chip and described optocoupler, for the data of optocoupler are sent to described IC card chip by demodulation mode;
Modulation has two kinds of modes, passive capacitive way and initiatively capacitive way:
Under passive capacitive way, modulation circuit by being switched on or switched off the path of conductive contact to human body, thus makes mobile device it is identified as " touch "/" non-tactile " event;
Initiatively under capacitive way, modulation circuit can by the touch-screen sweep signal of pre-sampling, send in active mode or stop sending conductive contact is anti-phase, this will weaken or stop weakening the collection electric capacity of touch-screen sweep circuit, thus makes mobile device be identified as " touch "/" non-tactile " event.
17. IC-cards as claimed in claim 16, it is characterized in that, IC-card also comprises power supply, and described power supply connects optocoupler, for providing electric power when IC-card and mobile device carry out bidirectional data communication to described IC-card.
18. IC-cards as described in claim 16 or 17, it is characterized in that, IC-card also comprises the IC-card coil be arranged in IC-card inner structure, to complete the contactless communication of IC-card and peripheral hardware, or IC-card also comprises the IC-card contact being arranged on insulation course, described IC-card contact exposes to described insulation course, can by reader device physics and relay contacts.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410258989.6A CN104123644B (en) | 2014-06-11 | 2014-06-11 | A kind of IC-card that can communicate with capacitance touch screen and system and method thereof |
| PCT/CN2014/080167 WO2015188391A1 (en) | 2014-06-11 | 2014-06-18 | Ic card capable of communicating with capacitive touchscreen, and system and method thereof |
| HK15105558.6A HK1203294A2 (en) | 2014-06-11 | 2015-06-11 | An ic card which can communicate with a capacitive touch screen and the system and method of the card ic |
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| CN201410258989.6A CN104123644B (en) | 2014-06-11 | 2014-06-11 | A kind of IC-card that can communicate with capacitance touch screen and system and method thereof |
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| CN104123644B true CN104123644B (en) | 2015-12-09 |
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| EP2980569B1 (en) | 2014-08-01 | 2020-09-23 | Nokia Technologies Oy | An apparatus and method for sensing a parameter |
| EP2980727B1 (en) | 2014-08-01 | 2019-06-26 | Nokia Technologies OY | Apparatus and methods for enabling information to be read from a touch screen apparatus |
| WO2019085869A1 (en) * | 2017-10-31 | 2019-05-09 | Ha Elwin Yui Hang | Two-way communication between electronic card and touchscreen device |
| US11526682B2 (en) | 2019-09-11 | 2022-12-13 | Yat Fei CHEUNG | Substrate with electrically conductive pads that are readable by touchscreen device |
| CN111046687A (en) * | 2019-12-23 | 2020-04-21 | 珠海格力电器股份有限公司 | Method for reducing NFC scanning power consumption, storage medium and application equipment |
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| US10504105B2 (en) * | 2010-05-18 | 2019-12-10 | Dynamics Inc. | Systems and methods for cards and devices operable to communicate to touch sensitive displays |
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| CN1820287A (en) * | 2003-07-30 | 2006-08-16 | Acs技术方法瑞士股份公司 | Terminal with touch panel display and touch panel display |
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