CN108108802B - Visual card and balance display method thereof - Google Patents
Visual card and balance display method thereof Download PDFInfo
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- CN108108802B CN108108802B CN201711273788.3A CN201711273788A CN108108802B CN 108108802 B CN108108802 B CN 108108802B CN 201711273788 A CN201711273788 A CN 201711273788A CN 108108802 B CN108108802 B CN 108108802B
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- chip
- balance
- card
- control module
- transaction
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- 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
- G06K19/07707—Constructional details, e.g. mounting of circuits in the carrier the record carrier comprising an interface suitable for human interaction the interface being visual the visual interface being a display, e.g. LCD or electronic ink
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- 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
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- 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
- G07F7/0806—Details of the card
- G07F7/0846—On-card display means
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- 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
- G07F7/0873—Details of the card reader
- G07F7/0893—Details of the card reader the card reader reading the card in a contactless manner
Abstract
The invention discloses a visual card and a balance display method thereof, which can display the latest balance after transaction is completed. A visual card comprising: the SE chip is used for communicating with the card reading equipment to carry out transaction; the control module is electrically connected with the SE chip and used for sending an APDU (automatic data Unit) instruction for reading balance to the SE chip after the communication connection between the visual card and the card reading equipment is established and receiving balance information returned by the SE chip, wherein the period of time is longer than the time for completing transaction by the SE chip; and the electronic ink screen is electrically connected with the control module and is used for displaying the balance information received by the control module.
Description
Technical Field
The invention relates to the field of communication, in particular to a visual card and a balance display method of the visual card.
Background
IC cards are also called as IC cards, and are widely used in finance, telecommunications, transportation, security management, identification, etc. due to their convenience in carrying and large storage capacity. In the prior art, in order to display information stored in an IC card, such as money in the card, user information, and the like, a visual IC card (referred to as a visual card for short) is currently available. Taking a visual bank card as an example, various functions such as transaction and balance reading are realized by sending a specific APDU (application protocol data unit) command to a security chip of the visual bank card through a non-card reader or a POS machine. When the SE (financial) security chip of the visible bank card completes the transaction, no information is returned to the MCU of the visible bank card. Thus, the card cannot read the SE transaction completion after the transaction is processed and return an identification of the transaction completion and read the balance.
Disclosure of Invention
In view of the above technical problems, it is an object of the present invention to provide a visual card and a balance display method thereof, which can display the latest balance after a transaction is completed.
In order to achieve the purpose, the invention adopts a technical scheme as follows:
a visual card comprising:
the SE chip is used for communicating with the card reading equipment to carry out transaction;
the control module is electrically connected with the SE chip and used for sending an APDU (automatic data Unit) instruction for reading balance to the SE chip after the communication connection between the visual card and the card reading equipment is established and receiving balance information returned by the SE chip, wherein the period of time is longer than the time for completing transaction by the SE chip;
and the electronic ink screen is electrically connected with the control module and is used for displaying the balance information received by the control module.
In some embodiments, the SE chip communicates with the card reading device through an antenna module,
the antenna module is used for communicating with the card reading equipment and generating an electric signal according to the magnetic signal of the card reading equipment.
In some embodiments, the visual card further comprises:
and the electric energy acquisition circuit is electrically connected with the antenna module and is used for converting the electric signal generated by the antenna module and then supplying power to the visual card.
In some embodiments, the power harvesting circuitry comprises:
the rectifying circuit is used for converting the electric signal generated by the antenna module into direct current;
and the reset circuit is connected with the rectifying circuit and used for carrying out voltage stabilization treatment on the direct current and powering off when the acquired voltage is smaller than a threshold value.
In some embodiments, the control module comprises an MCU.
The invention adopts a technical scheme as follows:
a balance display method of a visual card comprises the following steps:
s101, enabling a visual card to enter a magnetic field range of card reading equipment;
s102, communication is established between the SE of the visual card and card reading equipment to carry out transaction, and balance is obtained after the transaction is completed;
s103, the control module of the visual card sends an APDU instruction for reading balance to the SE chip after the visual card establishes communication connection with the card reading equipment, wherein the period of time is longer than the time for completing transaction by the SE chip;
s104, the SE chip responds to the APDU command and returns balance information to the control module;
and S105, the control module receives the returned balance information and sends the balance information to an electronic ink screen of the visual card for displaying.
In some embodiments, in step S105, the balance information is displayed on the electronic ink screen frequently, that is, the balance information is displayed on the electronic ink screen until the next transaction is completed.
In some embodiments, step S105 is followed by the following steps:
and S106, the visual card leaves the range of the magnetic field of the card reading equipment.
In some embodiments, the method further comprises the steps of:
s100, configuring the period of time in the step S103 according to the time required by the SE chip to process the transaction.
Compared with the prior art, the invention has the following advantages by adopting the scheme:
after a period of time delay, after the SE chip finishes processing the transaction, the control module reads the balance of the SE chip again, and can acquire the latest balance after the transaction so as to display the latest balance on the electronic ink screen.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. It is obvious that the drawings in the following description are only some embodiments of the invention, and it is obvious for a person skilled in the art that the invention can also be applied to other similar scenarios according to these drawings without inventive effort. Unless otherwise apparent from the context of language or otherwise indicated, like reference numerals in the figures refer to like structures and operations.
FIG. 1 is a schematic diagram of a visual card and a non-contact card reading device according to the present invention;
FIG. 2 is a block diagram of a visual card according to the present invention;
FIG. 3 is a circuit diagram of an electrical energy harvesting circuit according to the present invention;
fig. 4 is a flow chart of a visual card balance display method according to the present invention.
In the above-described figures of the drawings,
1. a visual card; 11. an SE chip; 12. MCU; 13. an electronic ink screen; 14. an antenna module; 15. an electric energy acquisition circuit; 151. a capacitor; 152. a rectifying circuit; 153. a reset circuit;
2. a card reading device; .
Detailed Description
Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that the advantages and features of the invention may be more readily understood by those skilled in the art.
Example 1
The embodiment provides a visual card, and this visual card specifically is visual financial card, like bank card, bus card, meal card, entrance guard's card etc. and it has balance display function.
Referring to fig. 1-2, the visual card 1 includes:
an SE chip 11 (Secure Element, also called a financial security chip) for communicating with the card reading device 2 to perform a transaction;
the control module, specifically an MCU 12, is electrically connected to the SE chip 11, and is configured to send an APDU instruction for reading a balance to the SE chip 11 at a time after the communication connection between the visual card 1 and the card reading device 2 is established, and receive balance information returned by the SE chip 11, where the time is longer than a time for the SE chip 11 to complete a transaction;
and the electronic ink screen 13 is electrically connected with the MCU 12 and is used for displaying the balance information received by the MCU 12.
As shown in fig. 1, the card reading device 2 is specifically a non-card reading device, such as a card reader, and may also be a POS machine.
The APDU command is based on different protocols depending on the type of visual card, such as ISO-7816 protocol corresponding to a bank card, SPI protocol corresponding to a home card or 15693 protocol.
The SE chip 11 communicates with the card reading device 2 specifically through an antenna module 14. The antenna module 14 is used for communicating with the card reading device 2 and generating an electric signal according to the magnetic signal of the card reading device. The antenna module 14 may be a plate-mounted coil, and may convert a magnetic signal of a card-reading device into an electrical signal.
The visual card 1 is specifically a passive visual card, which is powered by the magnetic field of the card reading device 2. The visible card 1 further comprises an electric energy acquisition circuit 15, wherein the electric energy acquisition circuit 15 is electrically connected with the antenna module 14 and used for converting the electric signal generated by the antenna module 14 into the electric signal to supply power to the visible card 1. Specifically, as shown in fig. 3, the power collecting circuit 15 includes a capacitor 151, a rectifying circuit 152, and a reset circuit 153. The capacitor 151 and the antenna module 14 form an oscillating circuit, and can convert the electromagnetic field intensity in the non-card reading equipment into alternating current; the rectifying circuit 152 can adopt a bridge rectifying circuit to convert the collected alternating current into direct current of 3.9-5.0V (which can be configured according to actual requirements); the reset circuit 153 includes a voltage stabilizing chip and a reset chip, the direct current converted by the rectifying circuit passes through the voltage stabilizing chip and then passes through the reset chip, and the reset chip has a function of not outputting current when the voltage passing through is less than a set threshold value. The threshold value can be set according to the model of the reset chip, and is generally 3.3-4.5V. By adopting the reset chip, the power supply can be cut off when the acquired voltage is smaller than the threshold value, so that the passive visual card is ensured to be powered off when the passive visual card leaves the magnetic field range of the card reading equipment; the visual card can be correctly electrified when entering the magnetic field range of the card reading equipment next time.
The electric energy collection circuit 15 is connected with the MCU 12 to supply power to the MCU. The MCU 12 integrates the drive of the electronic ink screen 13, and the MCU 12 supplies power to the SE chip 11 and the electronic ink screen 13 under the condition of power supply.
Example 2
The embodiment provides a balance display method of a visual card, which comprises the following steps:
s101, enabling a visual card to enter a magnetic field range of card reading equipment;
s102, communication is established between the SE of the visual card and card reading equipment to carry out transaction, and balance is obtained after the transaction is completed;
s103, the control module of the visual card sends an APDU instruction for reading balance to the SE chip after the visual card establishes communication connection with the card reading equipment, wherein the period of time is longer than the time for completing transaction by the SE chip;
s104, the SE chip responds to the APDU command and returns balance information to the control module;
s105, the control module receives the returned balance information and sends the balance information to an electronic ink screen of the visual card for displaying;
and S106, the visual card leaves the range of the magnetic field of the card reading equipment.
The method further comprises the steps of:
s100, configuring the period of time in the step S103 according to the time required by the SE chip to process the transaction.
Specifically, in the balance display method of the visual bank card, the visual bank card is a passive visual card powered by a magnetic field of a card reading device, and electronic cash balance information stored in an SE chip is displayed by using an electronic ink screen. As shown in fig. 4, when a transaction is performed, the passive visual card approaches the non-card reading device and enters the magnetic field range of the card reader; the SE chip establishes communication connection with the card reader through the antenna module, transaction is processed by using an ISO-14443 protocol, and the SE chip acquires the latest balance after the transaction is completed and updates and stores the latest balance; when the passive visual card enters the magnetic field range of the card reader and establishes communication connection within a period of time, the MCU is in a waiting state, and after the SE chip is enough to complete transaction and acquire the latest balance, an APDU instruction for reading the balance is transmitted to the SE chip through ISO-7816 protocol delay; the SE chip responds to the received APDU instruction and returns the latest balance information to the MCU; the MCU receives balance information returned by the SE chip and sends the balance information to the electronic ink screen for balance display; the visual card leaves the magnetic field range of the card reading device. The length of the time delay period can be configured, and the time delay period is longer than the time required by the SE chip for processing the transaction through joint modulation applied in the SE chip, namely after the transaction of the SE chip is finished, the MCU reads the balance in the SE chip. It should be noted that the balance information is often displayed on the electronic ink screen until the next transaction is completed and then updated.
In this embodiment, the MCU will start to provide power to the SE chip when there is power. The MCU outputs high level and waits for the return of the SE chip, for example, if the first byte of the returned information is not 0x3b, the MCU interrupts the following operation and directly drives the electronic ink screen to display 'ERR 01'; and after the time delay of the period of time is passed after the SE chip returns that the first byte is 0x3b, the MCU sends an APDU instruction based on the ISO-7816 protocol to the SE chip. For example, the APDU command for reading the balance is "00 a404000a42616c616e 6365417070", after the APDU command is successfully transmitted, the MCU may receive a return command such as "XX …" + "9000", where XX … represents the Data in the Data bank, the last 9000 is a SW (status code) command, and if the returned SW command is not 9000, the MCU may interrupt the following operations to drive the electronic ink screen to display "ERR 02"; if the returned SW command is 9000, the MCU will continue to send "00 b 2000208" and obtain the return information similar to "9 f 7906000000099990" + "9000", and the MCU extracts "099990" in the return values and converts the return information into 999.90 and drives the electronic ink screen to display "999.90".
The non-card reading device also updates the balance in the SE chip by using a similar APDU instruction, the SE chip interacts with the non-card reading device by using the antenna module in the process, and if the MCU is used for reading balance information in the process, two defects exist, the MCU consumes magnetic field energy in interaction between the visible card antenna and the card reading device, and balance writing failure is caused. At this time, the balance information in the SE may not be updated, resulting in the read balance not being up-to-date. The balance display method of the present invention avoids the above-mentioned problems.
The present invention is intended for passive visual card reading of the latest balance after a transaction. After a certain time delay, the latest balance after the transaction can be read by reading the balance after the SE chip processes the transaction.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and are preferred embodiments, which are intended to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the scope of the present invention. All equivalent changes or modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (3)
1. A balance display method of a passive visual card is characterized by comprising the following steps:
s101, enabling the passive visual card to enter a magnetic field range of the non-card reading equipment;
s102, the SE chip of the passive visual card establishes communication with a non-card reading device through an antenna module, carries out transaction by using an ISO-14443 protocol, and acquires the latest balance after the transaction and updates and stores the latest balance after the transaction is completed;
s103, the control module is in a waiting state within a period of time after the passive visual card enters the magnetic field range of the non-card reading equipment and establishes communication connection with the non-card reading equipment; after the SE chip completes the transaction and acquires the latest balance, the control module transmits an APDU instruction for reading the balance to the SE chip through ISO-7816 protocol delay, and the period of time is longer than the time for completing the transaction by the SE chip;
s104, the SE chip responds to the APDU command and returns balance information to the control module;
s105, the control module receives the returned balance information and sends the balance information to an electronic ink screen of the passive visual card for displaying;
s106, the passive visual card leaves the magnetic field range of the non-card reading equipment;
in step S103, the control module outputs a high level and waits for the return of the SE chip, and if the first byte of the returned information is not 0x3b, the control module interrupts the next operation and directly drives the electronic ink screen to display "ERR 01"; after the time delay of the period of time is passed after the first byte returned by the SE chip is 0x3b, the control module sends an APDU instruction based on an ISO-7816 protocol to the SE chip, wherein the instruction comprises a status code instruction, and if the returned status code instruction is not 9000, the control module interrupts the next operation and drives the electronic ink screen to display ERR 02; and if the returned status code instruction is 9000, the control module continuously sends the APDU instruction and obtains the returned information of the SE chip, and the control module extracts the balance information in the returned value and drives the electronic ink screen to display the latest balance.
2. The balance display method according to claim 1, wherein in step S105, the balance information is constantly displayed on the electronic ink screen.
3. The balance display method according to claim 1, characterized in that the method further comprises the steps of:
s100, configuring the period of time in the step S103 according to the time required by the SE chip to process the transaction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711273788.3A CN108108802B (en) | 2017-12-06 | 2017-12-06 | Visual card and balance display method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711273788.3A CN108108802B (en) | 2017-12-06 | 2017-12-06 | Visual card and balance display method thereof |
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| CN108108802A CN108108802A (en) | 2018-06-01 |
| CN108108802B true CN108108802B (en) | 2021-08-13 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109711519B (en) * | 2018-12-27 | 2022-10-25 | 江苏恒宝智能系统技术有限公司 | Financial chip-based peripheral expansion method and financial card |
| CN111797962A (en) * | 2020-06-22 | 2020-10-20 | 衡水海博云科技有限公司 | Passive visual card and working method thereof |
| CN112488274A (en) * | 2020-12-03 | 2021-03-12 | 杭州电子科技大学 | Intelligent card with screen and one-card-pass system |
| CN112598104B (en) * | 2021-03-03 | 2021-10-01 | 北京信通能创科技有限公司 | Visual card information display method and device, storage medium and computing equipment |
| CN113255865B (en) * | 2021-07-14 | 2022-04-01 | 飞天诚信科技股份有限公司 | Visual card and working method thereof |
| CN114372549A (en) * | 2021-12-23 | 2022-04-19 | 中国农业银行股份制有限公司云南省分行 | Electronic ink screen bank card |
| GB2615552A (en) * | 2022-02-10 | 2023-08-16 | Cool Partnership Ltd | Payment card and method |
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