EP1295248A1 - Kontakloses anzeigperipheriegerät für eine tragbare kontaklose gegenstand - Google Patents

Kontakloses anzeigperipheriegerät für eine tragbare kontaklose gegenstand

Info

Publication number
EP1295248A1
EP1295248A1 EP01949522A EP01949522A EP1295248A1 EP 1295248 A1 EP1295248 A1 EP 1295248A1 EP 01949522 A EP01949522 A EP 01949522A EP 01949522 A EP01949522 A EP 01949522A EP 1295248 A1 EP1295248 A1 EP 1295248A1
Authority
EP
European Patent Office
Prior art keywords
portable object
display device
peripheral display
reader
card
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP01949522A
Other languages
English (en)
French (fr)
Inventor
Olivier Parrault
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ASK SA
Original Assignee
ASK SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ASK SA filed Critical ASK SA
Publication of EP1295248A1 publication Critical patent/EP1295248A1/de
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
    • G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
    • G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
    • G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
    • G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
    • G06K19/07701—Constructional details, e.g. mounting of circuits in the carrier the record carrier comprising an interface suitable for human interaction
    • G06K19/07703—Constructional details, e.g. mounting of circuits in the carrier the record carrier comprising an interface suitable for human interaction the interface being visual
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
    • G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
    • G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
    • G06K19/07749—Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card
    • G—PHYSICS
    • 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
    • G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
    • G06K7/10009—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves
    • G06K7/10158—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves methods and means used by the interrogation device for reliably powering the wireless record carriers using an electromagnetic interrogation field
    • G06K7/10178—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves methods and means used by the interrogation device for reliably powering the wireless record carriers using an electromagnetic interrogation field including auxiliary means for focusing, repeating or boosting the electromagnetic interrogation field
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q20/00—Payment architectures, schemes or protocols
    • G06Q20/08—Payment architectures
    • G06Q20/20—Point-of-sale [POS] network systems
    • G06Q20/201—Price look-up processing, e.g. updating

Definitions

  • the present invention relates to peripherals for contactless portable objects such as smart cards, and more particularly to a peripheral contactless display device.
  • Portable objects such as smart cards, contact or contactless, are widely used today in many applications. These are generally ISO format cards which are coupled to readers, by which they are remotely supplied, that is to say by which they receive energy in the form of a magnetic field and with which they communicate.
  • ISO format cards which are coupled to readers, by which they are remotely supplied, that is to say by which they receive energy in the form of a magnetic field and with which they communicate.
  • electronic toll cards Users of such systems present them to readers who are at toll stations. There is then communication between the card and the reader. This communication allows the recognition of the user and the debit of the amount corresponding to the toll charge on his customer account.
  • the commonly used solution is the integration at the reader level of a liquid crystal display which informs the user of the successful execution of the communication and which indicates the information resulting from this communication.
  • the drawback of the display integrated into the reader is that the user can only read the information near the latter, by passing the card in front. Uncomfortable when it comes to an identification card, this constraint becomes much heavier when the card is an electronic wallet or a transport card. Indeed, the user wishes to be able to regularly consult his balance and this without being obliged to go to a payment terminal which constitutes the reader.
  • An existing solution consists in the additional use of a badge which plays the role of both card reader and display. Indeed, it is a case in which the card is inserted. The reader then feeds the card by contact, which allows communication between the card and the case. The information is then displayed on the case screen. The latter is used in particular for the electronic purse and allows you to consult the remaining balance at any time.
  • the major drawback of these badges is their size. Indeed, their dimensions are studied to allow them to receive a smart card in ISO format. Thus, unlike a smart card, they cannot be slipped into a wallet and must be carried in a pocket or a bag.
  • Another disadvantage is that they require an internal power source.
  • This source is generally a battery which allows the case to read the information on the card and display it. This source of food must therefore be renewed each time it is exhausted.
  • the object of the invention is to overcome these drawbacks by providing a contactless display peripheral device for contactless portable object, such as a smart card, having the capacity to display the information sent by the reader of the portable object or by the portable object itself, for a period long enough for the user of the portable object to be able to consult it at any time, even when the portable object is not at close to the reader, this display requiring for its operation only a low energy consumption, or even no energy at all.
  • the present invention relates to a display device for contactless portable object such as a smart card to display information related to the use of this portable object.
  • This peripheral device comprises at least one chip, a display means and a means for receiving energy and information, not connected by ohmic contact to the portable object.
  • This means of reception is a flat winding playing the role of the secondary of a transformer whose primary consists of the antenna of the portable object, when the latter receives energy and information, coming from a reader of the portable object, by electromagnetic coupling.
  • this peripheral display device can be separated from the contactless object and has a bistable liquid crystal screen.
  • FIG. 1 represents a contactless smart card in ISO format having an integrated peripheral display device .
  • FIG. 2 represents a functional diagram of the peripheral display device and of the various elements which constitute it.
  • FIG. 3 represents the electrical diagram of a contactless smart card.
  • FIG. 4 represents the electrical diagram of a peripheral display device.
  • FIG. 1 thus represents a contactless smart card in ISO format having an integrated peripheral device.
  • This card 10 consists of a chip 12. The latter, when the card is arranged in the field of the reader, enters into communication with the latter via the antenna of the card 14. This antenna consists of turns of increasing circumference. Each end of this antenna is connected to the chip 12.
  • the peripheral display device 20 consists of a chip (not visible in the figure), a screen 16 and a flat winding 18 connected to the chip of the peripheral display device and made up of turns of increasing circumference. The size of this flat winding varies according to the specifics of the card with which the peripheral display device operates.
  • the peripheral display device 20 preferably consists of a chip 22, connected to the winding 18 and to the screen 16.
  • the chip 22 consists of 3 blocks: the analog block 24, the block decoding message 26 and the display control block 28.
  • analog block 24 The role of analog block 24 is to rectify and regulate the alternating signal, available at the terminals of winding 18.
  • This signal is created by a carrier frequency of 13.56 megahertz (MHz), which is the coupling frequency between the card. contactless chip and reader, to generate the DC supply voltage necessary for the operation of the peripheral display device. It formats the main clock signals from this carrier frequency of 13.56 MHz, which will allow the sequential operation of the peripheral display device. It extracts and formats the superimposed data according to the amplitude modulation at the carrier frequency of 13.56 MHz, transmitted by the reader destined for the chip of the contactless card and destined for the peripheral display device.
  • MHz 13.56 megahertz
  • the value of the sub-carrier retromodulation frequency is equal to 847 kilohertz (KHz) (standard currently used). It can also be configured to receive the data which would be transmitted on the subcarrier frequency of retromodulation by the card chip.
  • the peripheral device is also equipped with a message decoding block 26.
  • This block is more or less complex. It can be a microcontroller, a simple decoder or a wired logic circuit. The purpose of this block is to separate and process the messages intended for it in the middle of those which pass on the carrier and subcarrier frequencies during communication between the coupler and the contactless card.
  • the display control unit 28 is an interface circuit making it possible to convert the data received by the peripheral display device into signals compatible with the display technology used, constituted by the screen 16, in order to drive the segments. or corresponding pixels.
  • the dimensions of the latter are very variable and depend on the consumption and the voltage, necessary for supplying the peripheral device.
  • the winding 18 of the peripheral display device will be of dimensions much smaller than the dimensions of the antenna of the contactless card (see figure 1).
  • the winding can be optionally interleaved or superimposed on the antenna of the contactless card to benefit from better coupling.
  • the screen 16 is preferably a liquid crystal screen.
  • FIG. 3 represents the electrical diagram of the contactless smart card 30. This is characterized by its coupling antenna 32, at least one capacitor 33 allowing the card to have a tuning capacity involved in the coupling with the reader at a frequency of 13.56 MHz. It also includes several resistors, including at least one resistor 34 which can be switched by means of a switch 35, in order to generate a frequency of retromodulation between the chip card and the reader.
  • FIG. 4 represents the electrical diagram of the peripheral display device 36. The latter is characterized by its flat winding 37. In order to be able to draw energy from the reader to allow the operation of the peripheral device, the principle is to use the main circuit tuned to card 30 as the primary of a transformer.
  • the planar winding 37 of the peripheral display device then constitutes the secondary of this transformer and receives the energy and the information by electromagnetic coupling.
  • the peripheral display device 36 also includes the resistor 38 which is switched by means of the switch 40 and thus modifies the impedance in order to generate a subcarrier frequency of retromodulation.
  • the impedance of the peripheral display device can be varied in order to transmit a response to the reader by retromodulation. This response is made via the main tuned circuit of the contactless card.
  • the peripheral display device can also communicate directly with the chip of the contactless card, depending on the retromodulation format and the type of retromodulator incorporated therein. As can be seen in Figure 4, the circuit of the peripheral display device 36 does not have tuning capacity. It cannot therefore function independently. It must therefore benefit, by coupling with the main antenna circuit, from the overvoltage linked to the agreement of the contactless card with the reader.
  • the impedance presented by the electronics of the peripheral display device can be reported in parallel to the impedance presented by the chip on the main antenna of the contactless card, depending on a mutual coupling m between the main antenna and the flat winding and of the ratio nl / n2, ni being the number of turns of the antenna of the contactless card and n2 the number of turns of the antenna of the peripheral device display.
  • the peripheral display device has a high impedance and a very low parasitic capacity before the rectifier, it can be supplied when the contactless card is present in the magnetic field of the reader, and this without significantly degrading the operation of the latter.
  • the latter uses the data generated by the contactless card chip in the form of a specific instruction and transmitted by the latter's main antenna. This instruction is generated once the transaction between the contactless card and the reader is completed.
  • the latter can use data transmitted by the reader simultaneously with energy and transmitted in amplitude modulation to the contactless card then transmitted by the main antenna thereof. and intended for him.
  • the screen of the peripheral display device is retentive. Indeed, the information remains displayed on the screen after the transaction so that the user can read it until the next transaction.
  • This retentive screen can be constituted by a bistable liquid crystal screen.
  • This recently developed technology consists in the use of liquid crystals which have the capacity to remain in a certain state, without consumption of energy. These liquid crystals use energy only to change their state.
  • An alternative to using a bistable liquid crystal display is to use a peripheral display device which has at least one storage capacitor. Indeed, to obtain a persistence of the display on the liquid crystal screen, it is necessary to apply a voltage across the screen sufficient to maintain the liquid crystals in their state.
  • One possibility is to insert into the peripheral display device a capacity which is charged when the card is in the magnetic field of the reader. The energy is transmitted to the capacitor after rectification by the flat winding of the peripheral display device which receives the information and the energy. The electric charge stored in the (or the capacitors) makes it possible to power the screen and therefore to maintain the liquid crystals in their state for a time greater than the average time between two swipes of the contactless card in the magnetic field of the reader. .
  • Another alternative for rendering the display retentive is the use of a battery. Indeed, it is possible to provide the peripheral device with a battery which is used to maintain the display. Preferably, a so-called “paper stack” is used which has a very small thickness.
  • the display is refreshed exclusively during the passage of the contactless card in the magnetic field of the reader when the information passes between the latter and the contactless card.
  • the contactless display peripheral device according to the invention can be integrated into the contactless card during its manufacture, it is in this case inseparable from the latter. It can also be attached to a pre-existing contactless card, in particular thanks to an adhesive and can in this case be separated from the contactless card.
  • the contactless display peripheral device can be separated from the contactless card, the display can only be refreshed if it is close to the contactless card when it is placed in the magnetic field of the reader. Indeed, the device according to the invention must be placed directly on the card or very close to it.
  • the peripheral display device according to the invention therefore constitutes a contactless peripheral device which is independent and not electrically connected to the chip of the contactless card.
  • Such a device can be applied to telephone cards which will eventually become contactless. It could also be adapted for highway payment cards if, in the future, these were likely to store in their memory a silver credit or a number of toll passages.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Electromagnetism (AREA)
  • Business, Economics & Management (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Accounting & Taxation (AREA)
  • Toxicology (AREA)
  • Health & Medical Sciences (AREA)
  • General Business, Economics & Management (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Strategic Management (AREA)
  • Finance (AREA)
  • General Health & Medical Sciences (AREA)
  • Artificial Intelligence (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Credit Cards Or The Like (AREA)
  • Near-Field Transmission Systems (AREA)
  • Liquid Crystal (AREA)
EP01949522A 2000-06-29 2001-06-26 Kontakloses anzeigperipheriegerät für eine tragbare kontaklose gegenstand Withdrawn EP1295248A1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR0008438A FR2811108B1 (fr) 2000-06-29 2000-06-29 Dispositif peripherique d'affichage sans contact pour objet portable sans contact
FR0008438 2000-06-29
PCT/FR2001/002010 WO2002001496A1 (fr) 2000-06-29 2001-06-26 Dispositif peripherique d'affichage sans contact pour objet portable sans contact

Publications (1)

Publication Number Publication Date
EP1295248A1 true EP1295248A1 (de) 2003-03-26

Family

ID=8851900

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01949522A Withdrawn EP1295248A1 (de) 2000-06-29 2001-06-26 Kontakloses anzeigperipheriegerät für eine tragbare kontaklose gegenstand

Country Status (12)

Country Link
US (1) US6799721B2 (de)
EP (1) EP1295248A1 (de)
JP (1) JP4861595B2 (de)
KR (1) KR100833331B1 (de)
CN (1) CN1175376C (de)
AU (1) AU2001270659A1 (de)
CA (1) CA2382083C (de)
FR (1) FR2811108B1 (de)
HK (1) HK1051590A1 (de)
IL (2) IL147979A0 (de)
TW (1) TW550516B (de)
WO (1) WO2002001496A1 (de)

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IL147979A (en) 2011-08-31
JP2004502246A (ja) 2004-01-22
AU2001270659A1 (en) 2002-01-08
KR20020042656A (ko) 2002-06-05
CA2382083A1 (fr) 2002-01-03
CN1175376C (zh) 2004-11-10
FR2811108A1 (fr) 2002-01-04
IL147979A0 (en) 2002-09-12
CN1383526A (zh) 2002-12-04
US20020105065A1 (en) 2002-08-08
US6799721B2 (en) 2004-10-05
KR100833331B1 (ko) 2008-05-29
CA2382083C (fr) 2010-03-16
FR2811108B1 (fr) 2002-09-27
HK1051590A1 (en) 2003-08-08
TW550516B (en) 2003-09-01
WO2002001496A1 (fr) 2002-01-03
JP4861595B2 (ja) 2012-01-25

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