DE4207779A1 - IC data card with non-contact transmission of signals and power - has single contact to screening layer on card that connects with embedded circuitry to hold constant voltage level, and memory for stored information - Google Patents

IC data card with non-contact transmission of signals and power - has single contact to screening layer on card that connects with embedded circuitry to hold constant voltage level, and memory for stored information

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Publication number
DE4207779A1
DE4207779A1 DE19924207779 DE4207779A DE4207779A1 DE 4207779 A1 DE4207779 A1 DE 4207779A1 DE 19924207779 DE19924207779 DE 19924207779 DE 4207779 A DE4207779 A DE 4207779A DE 4207779 A1 DE4207779 A1 DE 4207779A1
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DE
Germany
Prior art keywords
data
data carrier
dvg
card
contact
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Withdrawn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
DE19924207779
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German (de)
Inventor
Walter Holzer
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.)
Provera Gesellschaft fuer Projektierung und Vermoegensadministration mbH
Original Assignee
Provera Gesellschaft fuer Projektierung und Vermoegensadministration mbH
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Application filed by Provera Gesellschaft fuer Projektierung und Vermoegensadministration mbH filed Critical Provera Gesellschaft fuer Projektierung und Vermoegensadministration mbH
Priority to DE19924207779 priority Critical patent/DE4207779A1/en
Publication of DE4207779A1 publication Critical patent/DE4207779A1/en
Withdrawn legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07F—COIN-FREED OR LIKE APPARATUS
    • G07F7/00—Mechanisms actuated by objects other than coins to free or to actuate vending, hiring, coin or paper currency dispensing or refunding apparatus
    • G07F7/08—Mechanisms actuated by objects other than coins to free or to actuate vending, hiring, coin or paper currency dispensing or refunding apparatus by coded identity card or credit card or other personal identification means
    • G07F7/10—Mechanisms actuated by objects other than coins to free or to actuate vending, hiring, coin or paper currency dispensing or refunding apparatus by coded identity card or credit card or other personal identification means together with a coded signal, e.g. in the form of personal identification information, like personal identification number [PIN] or biometric data
    • G07F7/1008—Active credit-cards provided with means to personalise their use, e.g. with PIN-introduction/comparison system
    • 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
    • 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
    • G06K19/0723—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 the record carrier comprising an arrangement for non-contact communication, e.g. wireless communication circuits on transponder cards, non-contact smart cards or RFIDs
    • 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
    • G06K19/07773—Antenna details
    • G06K19/07788—Antenna details the antenna being of the capacitive type
    • 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
    • G06K7/10316—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 using at least one antenna particularly designed for interrogating the wireless record carriers
    • G06K7/10326—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 using at least one antenna particularly designed for interrogating the wireless record carriers the antenna being of the very-near field type, e.g. capacitive
    • 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
    • G06Q20/30—Payment architectures, schemes or protocols characterised by the use of specific devices or networks
    • 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
    • G06Q20/346—Cards serving only as information carrier of service

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Computer Hardware Design (AREA)
  • Toxicology (AREA)
  • Health & Medical Sciences (AREA)
  • Business, Economics & Management (AREA)
  • Accounting & Taxation (AREA)
  • Strategic Management (AREA)
  • General Business, Economics & Management (AREA)
  • Electromagnetism (AREA)
  • General Health & Medical Sciences (AREA)
  • Artificial Intelligence (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Credit Cards Or The Like (AREA)

Abstract

The IC data card (1) has an embedded microprocessor coupled to a data transmitter (DS2), a data receiver (DE1) and a energy receiver (SV2). Energy required for actuation and use of the on chip circuits is received via a non-contact coupling (5, 5a) that may be capacitive or inductive. The energy is provided when the card is inserted into a data processing terminal (6). A similar transmission path is provided for the exchange of data. The power supply (SV1) within the data processor has a connector to a mechanical contact (3) that engages the metal screening surface of the card. This surface connects (4) to the processor and maintains a constant voltage level. ADVANTAGE - Stabilises voltage potential, non-contact transmission.

Description

In zunehmendem Maße werden zum Speichern von Informationen Da­ tenträger benutzt, welche die Form von Scheckkarten besitzen und die mit intelligenten elektronischen Bauelementen, wie Mi­ kroprozessoren und Speichern, ausgestattet sind.Increasingly, information is being stored there used carriers which are in the form of credit cards and with intelligent electronic components such as Mi microprocessors and memories.

Diese Chip-Karten weisen gegenüber den früher üblichen Magnet­ karten wesentliche Vorteile auf. Ihre Speicherkapazität ist größer, ihre Zuverlässigkeit besser, aber sie benötigen eine Kon­ taktierung, welche ihnen die notwendige Betriebsspannung liefert und den Datentransfer in beiden Richtungen ermöglicht.These chip cards point towards the magnet that used to be common card essential advantages. Your storage capacity is bigger, their reliability better, but they need a con clocking, which provides you with the necessary operating voltage and enables data transfer in both directions.

Es wird angestrebt, solche Karten als "Dauerkarten" auszubilden und als "Multifunktionskarten" zu benutzen. Das erfordert aller­ dings zuverlässige Kontakte, weil die Karten über eine längere Zeit und viel häufiger benutzt werden.The aim is to develop such cards as "season tickets" and to use as "multifunction cards". That requires everyone However, reliable contacts because the cards are longer Time and much more frequently.

Der neue Trend ist daher die Schaffung von "kontaktlosen" Kar­ ten, welche keiner Abnutzung und Verschmutzung unterliegen.The new trend is therefore the creation of "contactless" cards which are not subject to wear and soiling.

Diese Karten haben allerdings den Nachteil, daß ihnen meist die erforderliche Energie und vor allem die Daten über hochfrequente Übertragungswege zugesendet werden, was nicht nur eine Strahlenbe­ lastung der Umgebung, sondern auch eventuell Funk- und Fernsehstö­ rungen zur Folge hat. However, these cards have the disadvantage that they usually required energy and especially the data on high frequency Transmission paths are sent, which is not just a radiation pollution of the environment, but also radio and television interference results.  

Umgekehrt kann der Datentransfer und auch das Arbeiten der elektronischen Schaltungen des Mikroprozessors und der anderen Bauelemente durch Umgebungseinflüsse gestört werden. Dies ist schon dadurch begünstigt, daß die elektronischen Schaltungen des Datenträgers auf einem unbestimmten Potential "schwimmen" und durch Aufladungen arge Störungen, wenn nicht sogar Schäden an den empfindlichen Schaltkreisen entstehen können.Conversely, the data transfer and also the work of the electronic circuits of the microprocessor and the others Components are disturbed by environmental influences. This is already favored by the fact that the electronic circuits of the "Float" and on an undetermined potential from malfunctions caused by charging, if not damage to the sensitive circuits.

Erfindungsgemäß wird eine Lösung vorgeschlagen, welche diese Nachteile beseitigt, indem man den Begriff "kontaktlos" zum Teil verläßt und zumindest eine galvanische Kontaktverbindung zum Po­ tentialausgleich zwischen dem Datenträger und dem Datenverarbei­ tungsgerät vorsieht.According to the invention a solution is proposed, which this Disadvantages eliminated by using the term "contactless" in part leaves and at least a galvanic contact connection to the Po equipotential bonding between the data carrier and the data processing device.

Die Stabilisierung des Potentials des Datenträgers wird erfin­ dungsgemäß ferner dazu benutzt, zumindest teilweise, leitende Abschirmflächen mit diesem Potential zu verbinden.The stabilization of the potential of the data carrier is invented according to the invention also used, at least partially, conductive To connect shielding surfaces with this potential.

Da solche Abschirmflächen meistens auf der äußeren Oberfläche angeordnet sind, wird erfindungsgemäß empfohlen, die Kontaktver­ bindung direkt über diese Abschirmflächen mittels federnder Gegenkontakte des Datenverarbeitungsgerätes herzustellen.Because such shielding surfaces are mostly on the outer surface are arranged, it is recommended according to the invention, the contact ver binding directly over these shielding surfaces by means of resilient To establish counter-contacts of the data processing device.

Solche Kontakte werden üblicherweise geschlitzt, so daß eine Mehrfachberührung vorhanden und eine gute Kontaktgabe garantiert ist.Such contacts are usually slotted so that a Multiple contacts available and good contact guaranteed is.

Die Kontaktverbindung kann erfindungsgemäß als gemeinsames Be­ zugspotential der Datenempfänger und der Datenausgabeeinrichtungen des Datenträgers und des DVG benutzt werden.According to the invention, the contact connection can be used as a common reference potential of the data receiver and the data output devices of the data carrier and the DVG are used.

Das erleichtert beispielsweise eine kapazitive Datenübertragung mit nur einem Kondensatorbelag im Datenträger. This facilitates capacitive data transmission, for example with only one capacitor coating in the data carrier.  

Werden für die Datenübertragung zum Datenempfänger des Daten­ trägers und für die Datenausgabe in Gegenrichtung getrennte kapa­ zitive Wege gewählt, so bedeutet das gemeinsame Bezugspotential ebenfalls eine wesentliche Vereinfachung.Become the data recipient of the data for data transmission carrier and separate kapa for data output in the opposite direction chosen paths, that means the common reference potential also a significant simplification.

Auch eine induktive Datenübertragung wird durch die Abschirmung vor Störeinflüssen geschützt, und sie verringert auch Ausstrahlun­ gen von den erforderlichen Induktionsspulen.The shield also enables inductive data transmission protected from interference and it also reduces radiation required induction coils.

Bei der kapazitiven Datenübertragung können die den Kontakt­ druck vermittelnden Federn dazu benützt werden, den Datenträger gegen den Kondensatorbelag des DVGs zu drücken, so daß eine opti­ male Übertragung gesichert ist.With capacitive data transmission, they can make contact pressure-imparting springs are used for the data carrier to press against the capacitor coating of the DVG, so that an opti male transmission is secured.

Eine solche Federung würde überdies einen in eine Halterung eingeschobenen Datenträger gegen Herausfallen sichern.Such a suspension would also fit into a bracket Secure inserted data media against falling out.

In vielen Fällen ist es erwünscht, auf dem Datenträger ein Dis­ play (8) zur Anzeige des jeweiligen Speicherinhaltes vorzusehen. Da der Inhalt der Datenspeicher nur abgelesen werden muß, wenn der Datenträger nicht in eine Halterung des DVG eingesetzt ist, wird erfindungsgemäß empfohlen, für ein solches LC-Display (8) eine ge­ trennte Stromversorgung mittels einer Solarzelle vorzusehen. Das heißt, während der kontaktlosen Übertragung der benötigten Energie aus dem DVG für den Datenträger (1) wird keine Energie für das LC- Display (8) vom DVG (6) entnommen.In many cases it is desirable to provide a dis play ( 8 ) on the data carrier for displaying the respective memory content. Since the content of the data memory only has to be read when the data carrier is not inserted into a holder of the DVG, it is recommended according to the invention to provide a separate power supply by means of a solar cell for such an LC display ( 8 ). This means that during the contactless transmission of the required energy from the DVG for the data carrier ( 1 ), no energy for the LC display ( 8 ) is taken from the DVG ( 6 ).

Fig. 1 zeigt schematisch eine einfache erfindungsgemäße Ausfüh­ rung eines Datenträgers (1) mit kapazitiver Übertragung der Datenwerte und der Energieversorgung. Im Datenträger (1) ist der Datenempfänger DE1 und ein Datensender DS2 vorgesehen, die mit dem Mikroprozessor MP, der die entsprechenden Speicher enthält, in Verbindung stehen. Der Energieempfänger SV2 der Stromversorgung wird ebenso wie der Datenempfänger DE1 und der Datensender DS2 über Kondensatorbeläge (5a) an das DVG (6) gekoppelt. Fig. 1 shows schematically a simple embodiment of a data carrier ( 1 ) according to the invention with capacitive transmission of the data values and the energy supply. In the data carrier ( 1 ), the data receiver DE1 and a data transmitter DS2 are provided, which are connected to the microprocessor MP, which contains the corresponding memories. The energy receiver SV2 of the power supply, like the data receiver DE1 and the data transmitter DS2, is coupled to the DVG ( 6 ) via capacitor coatings ( 5 a).

Im Datenverarbeitungsgerät DVG (6) befinden sich ein Mikroprozessor (MP1) mit korrespondierendem Datensender DS1 und Datenempfänger DE2 sowie die Stromversorgung SV1, deren Kondensatorbeläge (5) den entsprechenden Kondensatorbelägen (5a) gegenüberstehen.In the data processing device DVG ( 6 ) there is a microprocessor (MP1) with a corresponding data transmitter DS1 and data receiver DE2 as well as the power supply SV1, the capacitor coatings ( 5 ) of which correspond to the corresponding capacitor coatings ( 5 a).

Der zweite Pol der Stromversorgung SV1 (-) führt zu dem Federkontakt (3), welcher beim Einschieben des Datenträgers (1) in seine Halterung an den leitenden Abschirmflächen (2) Kontakt gibt. Die Abschirmflächen (2) sind ihrerseits über eine Leitung (4) mit dem Mikroprozessor MP verbunden, der sowohl mit dem Datenempfänger DE1 als auch dem Datensender DS2 galvanisch verschaltet ist. Dadurch wird erreicht, daß beim Einstecken des Datenträgers in eine Halterung am DVG (6) alle Bauteile auf dem gleichen Potential sind, und durch die leitenden Abschirmflächen (2) ein Streuen von Störungen weitgehend unterbunden wird.The second pole of the power supply SV1 (-) leads to the spring contact ( 3 ), which makes contact with the conductive shielding surfaces ( 2 ) when the data carrier ( 1 ) is inserted into its holder. The shielding surfaces ( 2 ) are in turn connected via a line ( 4 ) to the microprocessor MP, which is electrically connected to both the data receiver DE1 and the data transmitter DS2. This ensures that when the data carrier is inserted into a holder on the DVG ( 6 ), all components are at the same potential, and scattering of interference is largely prevented by the conductive shielding surfaces ( 2 ).

Die Fig. 2 zeigt eine andere beispielhafte Ausführung eines er­ findungsgemäßen Datenträgers (1). In diesem Fall ist der Datensen­ der DS1 des DVG (6) mit dem Datenempfänger DE1 des Datenträgers (1) kapazitiv über die Kondensatorbeläge (5) und (5a) gekoppelt, hingegen die Rückübertragung von Daten erfolgt vom Datensender DS2 über die Induktionsschleife (7) zum Datenempfänger DE2 mit Schleife (7a) zum DVG (6). Fig. 2 shows another exemplary embodiment of a data carrier according to the invention ( 1 ). In this case, the data transmission from the DS1 of the DVG ( 6 ) is capacitively coupled to the data receiver DE1 from the data carrier ( 1 ) via the capacitor coatings ( 5 ) and ( 5 a), whereas the data transmitter DS2 is retransmitted via the induction loop ( 7 ) to the data receiver DE2 with loop ( 7 a) to the DVG ( 6 ).

Die Energieübertragung vom DVG (6) zum Datenträger (1) erfolgt ebenfalls kapazitiv, wie in Fig. 1.The energy transmission from the DVG ( 6 ) to the data carrier ( 1 ) is also capacitive, as in FIG. 1.

Als Zusatz ist in diesem Beispiel ein LC-Display (8) darge­ stellt, welches mit einer getrennten Stromversorgung (9), aus So­ larzellen bestehend, gespeist wird. Durch diese zusätzliche Strom­ versorgung wird die kapazitive Energieübertragung von der Strom­ versorgung SV1 zur Stromversorgung SV2 entlastet. Ein Versagen der Datenübertragung wegen mangelnder Beleuchtung wird dadurch vermieden. As an additive, an LC display ( 8 ) is shown in this example, which is supplied with a separate power supply ( 9 ) consisting of solar cells. This additional power supply relieves the capacitive energy transfer from the power supply SV1 to the power supply SV2. This prevents data transmission failure due to insufficient lighting.

Auch dieses Beispiel ist nur zum besseren Verständnis des Er­ findungsgedankens dargestellt. Die Zeichnungen sind keineswegs be­ schränkend aufzufassen, sondern sollen weitere Anregungen für er­ findungsgemäße Lösungen der Aufgabe geben.This example is only for a better understanding of the He inventive idea shown. The drawings are by no means restrictive, but should provide further suggestions for him Give inventive solutions to the task.

Claims (8)

1. Datenträger mit mindestens einem Speicher zum Speichern von Daten, einer Daten-Empfangs- und Daten-Ausgabeeinrich­ tung, die mit einer korrespondierenden Datenausgabe und Empfangseinrichtungen eines Datenverarbeitungsgerätes ("DVG") in kontaktloser Verbindung stehen und im Datenträ­ ger eine Stromversorgung vorhanden ist, dadurch gekennzeichnet, daß mindestens eine galva­ nische Kontaktverbindung zwischen dem Datenträger und dem Datenverarbeitungsgerät vorhanden ist.1. data carrier with at least one memory for storing data, a data receiving and data output device, which are in contactless connection with a corresponding data output and receiving devices of a data processing device (“DVG”) and a power supply is present in the data carrier, characterized in that there is at least one galvanic African contact connection between the data carrier and the data processing device. 2. Datenträger nach Anspruch 1, dadurch gekenn­ zeichnet, daß der Datenträger zumindest teilweise leitende Abschirmflächen aufweist.2. Data carrier according to claim 1, characterized records that the disk at least partially has conductive shielding surfaces. 3. Datenträger nach Anspruch 1, dadurch gekenn­ zeichnet, daß die Kontaktverbindung zwischen Da­ tenträger und DVG über die Abschirmflächen unter Federvor­ spannung mit Gegenkontakten des DVG erfolgt. 3. Data carrier according to claim 1, characterized records that the contact connection between Da carrier and DVG over the shielding surfaces under the spring voltage with counter contacts of the DVG.   4. Datenträger nach einem oder mehreren der vorstehenden An­ sprüche, dadurch gekennzeichnet, daß die Kontaktverbindung als gemeinsames Bezugspotential der Datenempfangs- und/oder der Datenausgabeeinrichtungen des Datenträgers und des DVG benutzt wird.4. Data carrier according to one or more of the preceding An sayings, characterized, that the contact connection as a common reference potential the data receiving and / or the data output devices of the data carrier and the DVG is used. 5. Datenträger nach einem oder mehreren der vorstehenden An­ sprüche, dadurch gekennzeichnet, daß die Datenübertragung kapazitiv und/oder induktiv er­ folgt.5. Data carrier according to one or more of the preceding An sayings, characterized, that the data transmission capacitive and / or inductive he follows. 6. Datenträger nach einem oder mehreren der vorstehenden An­ sprüche, dadurch gekennzeichnet, daß die den Kontaktdruck zwischen dem Datenträger und dem DVG vermittelnden Federn bei kapazitiven Datenübertragun­ gen den Datenträger in Richtung des Kondensatorbelages des DVG drücken.6. Data carrier according to one or more of the preceding An sayings, characterized, that the the contact pressure between the disk and the DVG mediating springs in capacitive data transmission conditions the disk in the direction of the capacitor coating Press DVG. 7. Datenträger nach einem oder mehreren der vorstehenden An­ sprüche, dadurch gekennzeichnet, daß die Stromversorgung ebenfalls kapazitiv oder induktiv erfolgt.7. Data carrier according to one or more of the preceding An sayings, characterized, that the power supply is also capacitive or inductive he follows. 8. Datenträger nach einem oder mehreren der vorstehenden An­ sprüche, dadurch gekennzeichnet, daß am Datenträger ein Display, z. B. ein LC-Display, vor­ handen ist, welches von einer Solarzelle mit Strom ver­ sorgt wird.8. Data carrier according to one or more of the preceding An sayings, characterized, that on the disk a display, for. B. an LC display is present, which ver from a solar cell with electricity will worry.
DE19924207779 1992-03-11 1992-03-11 IC data card with non-contact transmission of signals and power - has single contact to screening layer on card that connects with embedded circuitry to hold constant voltage level, and memory for stored information Withdrawn DE4207779A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19924207779 DE4207779A1 (en) 1992-03-11 1992-03-11 IC data card with non-contact transmission of signals and power - has single contact to screening layer on card that connects with embedded circuitry to hold constant voltage level, and memory for stored information

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Application Number Priority Date Filing Date Title
DE19924207779 DE4207779A1 (en) 1992-03-11 1992-03-11 IC data card with non-contact transmission of signals and power - has single contact to screening layer on card that connects with embedded circuitry to hold constant voltage level, and memory for stored information

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0736847A2 (en) * 1995-04-06 1996-10-09 VDO Adolf Schindling AG Communication interface between a computer and a device in a vehicle
DE10304584A1 (en) * 2003-02-05 2004-08-19 Abb Research Ltd. Communication of power and data to sensors and actuators in a process uses field transmission and avoids wiring
EP1862953A3 (en) * 2006-05-29 2008-02-13 Giesecke & Devrient GmbH Method for contactless data and/or energy transmission between a terminal and at least one transponder

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