CN102810147A - IC (integrated circuit) card read and wireless transmission device, passive display unit and IC card - Google Patents

IC (integrated circuit) card read and wireless transmission device, passive display unit and IC card Download PDF

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Publication number
CN102810147A
CN102810147A CN2011101478746A CN201110147874A CN102810147A CN 102810147 A CN102810147 A CN 102810147A CN 2011101478746 A CN2011101478746 A CN 2011101478746A CN 201110147874 A CN201110147874 A CN 201110147874A CN 102810147 A CN102810147 A CN 102810147A
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China
Prior art keywords
card
display unit
contact
read
information
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CN2011101478746A
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Chinese (zh)
Inventor
王文清
问治国
徐军
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3M Innovative Properties Co
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3M Innovative Properties Co
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Priority to CN2011101478746A priority Critical patent/CN102810147A/en
Publication of CN102810147A publication Critical patent/CN102810147A/en
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Abstract

The invention discloses an IC (integrated circuit) card read and wireless transmission device, a passive display unit and an IC card. The IC card read and wireless transmission device comprises a read circuit, a controller and a wireless transmission circuit, wherein the read circuit is used for reading information stored in the contactless IC card; the controller is used for controlling operation of the IC card read and wireless transmission device and processing the read information; and the wireless transmission circuit is used for transmitting the processed information by wireless signals. The passive display unit comprises an antenna, an energy capture circuit, a demodulation circuit, a controller and a nonvolatile display unit, wherein the antenna is used for receiving the wireless signals from an external device, the energy capture circuit is used for collecting energy of the wireless signals to generate power for the passive display unit to operate, the demodulation circuit is used for demodulating the received wireless signals to obtain information carried by the wireless information, the controller is used for confirming whether the information aims at the contactless IC card or not and analyzing display data in the confirmed information aiming at the contactless IC card, and the nonvolatile display unit is used for displaying the display data.

Description

IC-card reading and wireless base station apparatus, passive display unit and IC-card
Technical field
The application relates to non-contact IC (integrated circuit) card field, more particularly, relates to a kind of non-contact IC card reading and wireless base station apparatus, is used for the passive display unit and the non-contact IC card of contactless IC card.
Background technology
There is IC-card miscellaneous in the market,, brings great convenience for our life like transportation card, bank card or member card.But common IC-card does not all have Presentation Function, can't show and changed information that on the surface of card therefore the IC-card with Presentation Function arises at the historic moment.Being widely used of it for example, shows remaining sum on transportation card, on member card, show sales promotion information or membership information etc.Visual IC-card is exactly wherein a kind of, and it just can show various information on the surface of card not by means of battery; And when swiping the card, these visual informations can be updated.
But present visual IC-card exists some defectives, and the most outstanding is the restriction that it has number of rewrites, generally about 500 times.And the IC-card that other bands show generally can use battery that the energy of demonstration is provided, and battery electric quantity can't show after exhausting again.
In order rewrite operation can unconfinedly to be carried out again, many solutions have been proposed not by means of the battery display message.For example, in Jap.P. JP/2003/271911 (on March 13rd, 2002 is open), disclosed a kind of Contact Type Ic Card, comprised microprocessor, display driver and the non-volatile display unit of being with storage unit with demonstration.It is data and power pins and extraneous mutual completion of read write line through Contact Type Ic Card that its data transmission and energy obtain, but the situation of contactless IC card is not described.
In addition, in U.S. Pat 7,429, disclosed a kind of system and method that shows customized information through identification client or product identification in 984 (on September 30th, 2008 is open).This system comprises electromagnetic induction Card read/write device and wireless display unit.The Card read/write device is through reading RFID (RF identification) label such as HF (medium-high frequency) or UHF (ultrahigh frequency) label; Discern the identity of client or product, obtain customized information and these information are sent to wireless display unit according to this identity then through radiofrequency signal.But display medium is the volatibility display like LCD etc.
In Chinese patent CN101782958 (on 07 21st, 2010 open), disclosed a kind of IC-card and system that can directly show numerical value on the surface.This system comprises detection end for process and digital display IC card.Detecting end for process is made up of transmitting antenna and signal processing module.IC-card is made up of receiving antenna, processor and non-volatile display screen.The receiving antenna of IC-card receives and detects the electromagnetic signal that end for process is sent, comprising numerical information and work capacity.Numerical information shows on display screen after the processor processes of IC-card, and work capacity is used for to both power supplies after being received by the processor of IC-card and display screen.But the detection end for process in this system does not comprise the module for reading and writing for standard HF or UHF IC-card, and demonstration numerical value IC-card in this system and present ubiquitous non-contact IC card can not be general.
To sum up, do not comprise passive displaying scheme in the scheme of above-mentioned prior art for non-contact IC card.Therefore, need provide a kind of method and structure of novelty to realize the passive demonstration of non-contact IC card.
Summary of the invention
In view of the above problems, one of the object of the invention is to provide a kind of passive display systems that is used for non-contact IC card, and it is penetrated wireless signal through collection and obtains energy and video data, does not need battery or any external power supply.
According to an aspect of the present invention, provide a kind of non-contact IC card to read and wireless base station apparatus, having comprised: read circuit, read canned data in the non-contact IC card; Controller is controlled the operation of non-contact IC card reading and wireless base station apparatus, and the information that is read is handled; And wireless transmission circuit, send the information after handling through wireless signal.
Preferably, the frequency of operation of read circuit can be 13.56MHz, 915MHz and/or 2.4GHz, and/or the frequency of operation of wireless transmission circuit can be 13.56MHz, 915MHz and/or 2.4GHz.
Preferably, read circuit can be deferred to the iso standard agreement of contact type intelligent card, and/or wireless transmission circuit can be deferred to the Physical layer of the iso standard agreement of utilizing contact type intelligent card and the application layer complementary agreement that derives from.
Preferably, the information that reads and/or the information of transmission can comprise the sign and the valid data of non-contact IC card.
Preferably, read circuit and wireless transmission circuit can realize by same circuit module, and controller can be controlled this circuit module and between read circuit function and wireless transmission circuit function, switches.
According to a further aspect in the invention, a kind of passive display unit that is used for non-contact IC card is provided, has comprised: antenna receives wireless signal from external device (ED); The energy capture circuit, the energy of collection wireless signal is to produce the power that supplies passive display unit work; Demodulator circuit carries out demodulation to the wireless signal that receives, to obtain the information that wireless signal carries; Controller confirms that whether information is to non-contact IC card; And non-volatile display unit, wherein, controller is directed against parsing and displaying data the information of non-contact IC card from determined, and shows video data through non-volatile display unit.
Preferably, this passive display unit can also comprise nonvolatile memory, is used to store the sign of passive display unit, and the sign of passive display unit is corresponding with the sign of non-contact IC card.The information that wireless signal carries also can comprise IC-card sign and valid data.Controller can read the sign of the passive display unit of storing in the nonvolatile memory; And whether corresponding through the IC-card sign that comprises in the sign of judging passive display unit and the information that receives, confirm that whether received information is to non-contact IC card.
Preferably, the IC-card that in the sign of passive display unit and the information that receives, comprises identifies under the corresponding situation, and controller can be stored in the valid data that comprise in the received information in the nonvolatile memory.
Preferably, non-volatile display unit can comprise Electronic Paper.
In accordance with a further aspect of the present invention, a kind of non-contact IC card is provided, has comprised according to passive display unit of the present invention.
Preferably, this non-contact IC card can also comprise: label IC wherein stores the sign and the valid data of non-contact IC card; And antenna, wherein, label IC is carried out read-write operation via antenna.
The present invention goes for various non-contact IC cards, like bank card, transportation card, member card etc.
Description of drawings
With reference to the description of accompanying drawing to the embodiment of the invention, above-mentioned and other purposes of the present invention, feature and advantage will be more clear through following, in the accompanying drawings:
Fig. 1 shows the contactless IC card system according to routine techniques;
Fig. 2 shows the contactless IC card system that comprises passive Presentation Function according to the embodiment of the invention;
Fig. 3 shows according to the IC-card reading of the embodiment of the invention and the block scheme of wireless base station apparatus;
Fig. 4 shows the block scheme according to the passive display unit of the embodiment of the invention; And
Fig. 5 shows an example of energy capture circuit.
Same or analogous Reference numeral is represented identical or corresponding parts in the accompanying drawing.
Embodiment
Below, through the specific embodiment shown in the accompanying drawing the present invention is described.But should be appreciated that these descriptions are exemplary, and do not really want to limit scope of the present invention.In addition, in following explanation, omitted to the description of known configurations, to avoid unnecessarily obscuring notion of the present invention with technology.
Processing module as an example shown in the drawings.But some in these processing modules can be combined into individual module, and perhaps wherein some modules can be split as the plurality of sub module.It is pointed out that to make up through hardware, software, firmware or its and implement these processing modules.
Fig. 1 shows the contactless IC card system according to routine techniques.As shown in Figure 1, this contactless IC card system comprises Contactless IC Card Reader 1000 and non-contact IC card 2000.Card reader 1000 comprises and is used for non-contacting mode (for example, through radiowave) IC-card 2000 being carried out the read circuit 1001 of read-write operation, and is used for the particularly controller 1003 controlled of read circuit 1001 of reading card device.IC-card 2000 comprises the device 2001 that communicates with non-contacting mode and card reader 1000, the for example antenna of reception/transmission radiowave; And the label IC 2010 that places this card.Label IC 2010 can comprise the integrated circuit of accomplished in various ways, can be used to store sign, the valid data of this IC-card, and can be used to control the operation of IC-card 2000.This conventional contactless IC card system is known to those skilled in the art, its structure and operation is not described in detail at this.
It is pointed out that at this in Fig. 1, showing operating between read circuit 1001 and the label IC 2010 of reading and writing IC card with arrow carries out.In fact, this operation is carried out between read circuit 1001 and label IC 2010 via antenna 2001.
The objective of the invention is on the basis of this existing contactless IC card system,, keep the original system structure constant as far as possible simultaneously for non-contact IC card increases passive Presentation Function.
For this purpose, according to embodiments of the invention, a kind of contactless IC card system shown in Figure 2 is provided.As shown in Figure 2, comprise that according to the contactless IC card system of this embodiment IC-card is read and wireless base station apparatus 100 and non-contact IC card 200.
Outside IC-card reading and the function (particularly, reading and writing IC card) of wireless base station apparatus 100, can also launch for example electromagnetic wave of wireless signal in addition except above-mentioned card reader 1000.In addition, outside the circuit (antenna 201 and label IC 210, identical with label IC 2010) of IC-card 200 except above-mentioned IC-card 2000, also increased passive display unit 300 in addition with the antenna 2001 of routine.Passive display unit 300 can be attached to non-contact IC card 200 surfaces or be embedded in non-contact IC card 200 inside through variety of way.Wireless signal that IC-card is read and wireless base station apparatus 100 is launched such as electromagnetic wave therefrom obtain energy after being received by IC-card 200 (particularly, passive display unit 300), for the usefulness of passive demonstration.
Below, will combine embodiments of the invention, describe IC-card reading and wireless base station apparatus 100 and passive display unit 300 in detail.
Fig. 3 shows according to the IC-card reading of the embodiment of the invention and the block scheme of wireless base station apparatus 100.As shown in Figure 3, IC-card is read and wireless base station apparatus 100 comprises read circuit 101, controller 103 and wireless transmission circuit 105.
Read circuit 101 can comprise antenna and signal processing circuit.Read circuit 101 can be read and write non-contact IC card non-contact IC card 200 for example according to the present invention, for example, read in the non-contact IC card information and in non-contact IC card writing information.The exemplary operation frequency of read circuit 101 is 13.56MHz, 915MHz and/or 2.4GHz, typical reading/writing distance about about 10 centimetres (under the frequency of operation of 13.56MHZ) and/or 2 meters～5 meters (under the frequency of operation of 915MHz/2.4GHz).The agreement that read circuit 101 is supported can be the iso standard agreement that is used for contact type intelligent card, like ISO14443A/B, ISO15693, ISO18000-3, ISO18000-6, EPC Gen 1/EPC Gen 2 etc.
Controller 103 is used to control the operation of IC-card reading and wireless base station apparatus 100.Particularly, controller 103 produces the steering logic signal and realizes read-write protocol.Controller 103 is realized the agreement of read circuit 101, for example the iso standard agreement of contact type intelligent card such as ISO14443A/B, ISO15693, ISO18000-3, ISO18000-6, EPC Gen1/EPC Gen 2 etc. on the one hand; Realize the agreement of wireless transmission circuit 105 on the other hand.In the present invention; Owing to the take over party of wireless transmission circuit 105 is that passive display unit is not to be standard intelligent card; Therefore the agreement of wireless transmission circuit 105 can be to utilize the iso standard agreement of contact type intelligent card (like ISO14443A/B or ISO15693; ISO18000-3 (13.56MHz), perhaps ISO18000-6, EPC Gen 1/EPC Gen 2 (915MHz) etc.) Physical layer and the application layer complementary agreement that derives from.
In addition, the information of the non-contact IC card that 103 pairs of read circuits 101 of controller are read is handled, and the information after will handling is sent to wireless transmission circuit 105.Information after wireless transmission circuit 105 will be handled sends in the space through wireless signal.Particularly, the information after for example wireless transmission circuit 105 will be handled is modulated in the carrier signal of certain frequency, and sends the signal after the modulation.Said frequency for example comprises medium-high frequency section (HF) radio frequency and ultrahigh frequency (UHF) radio frequency, and for example typical frequency of operation is 13.56MHz, 915MHz and/or 2.4GHz.Wireless transmission circuit 105 can be embodied as same circuit with read circuit 101, switches IC-card reading and wireless transmission function by controller 103 through switching the different protocol type.Alternatively, wireless transmission circuit 105 can be implemented as independent circuits, comprises antenna and signal processing circuit, and frequency of operation comprises medium-high frequency (HF is like 13.56MHz) and ultrahigh frequency (UHF is like 915MHz/2.4GHz).
Fig. 4 shows the block scheme according to the passive display unit 300 of the embodiment of the invention.As shown in Figure 4, passive display unit 300 comprises antenna 301, demodulator circuit 302, energy capture circuit 303, controller 304, nonvolatile memory 305 and non-volatile display unit 306.
Demodulator circuit 302 is via antenna 301, receives the wireless signal that external device (ED) (in application shown in Figure 2, be that non-contact IC card is read and wireless base station apparatus 100, particularly, wireless transmission circuit 105 wherein) sends and demodulates the information of wherein carrying.Demodulator circuit 302 can be made up of antenna and signal processing circuit.Demodulator circuit 302 can be implemented as and the energy capture circuit 303 shared same antennas, and frequency of operation is identical.Alternatively, demodulator circuit 302 has independently antenna, and frequency of operation is consistent with the frequency of wireless transmission circuit 105.In Fig. 4, show the example of the demodulator circuit 302 and the energy capture circuit 303 shared same antennas 301.
Energy capture circuit 303 is collected the energy of the wireless signal that receives via antenna 301 and is translated into the working power of each parts in the passive display unit 300.The energy capture circuit can be made up of antenna, rectification circuit and voltage follower circuit.In application shown in Figure 2, the frequency of operation of energy capture circuit 303 is corresponding with the frequency of operation of wireless transmission circuit 105, is 13.56MHz like the frequency of operation of wireless transmission circuit 105, and then the frequency of operation of energy capture circuit 303 also is 13.56MHz; Equally, if the frequency of operation of wireless transmission circuit 105 is 915MHz or 2.4GHz, then the frequency of operation of energy capture circuit 303 also is 915MHz or 2.4GHz.
An example of energy capture circuit 303 has been shown among Fig. 5.Particularly, energy capture circuit 303 can comprise antenna, and antenna can be coil coupling (under the situation of 13.56MHz) or a poliarizing antenna (under the situation of 915MHz or 2.4GHz).Antenna can produce resonance with the wireless signal that receives, and the signal behind the resonance through rectification circuit (among the figure shown in the Diode symbol) and through after the voltage stabilizing (among the figure shown in the capacitor), obtains the circuit power voltage V of need of work after pressure limiting Cc(for example, shown in Figure 5 3.3V) and circuit logic voltage V Log(for example, shown in Figure 5 3.3V).The structure of this energy capture circuit 303 itself with operate in known in the artly, be not described in detail at this.
The operation of the passive display unit 300 of controller 304 controls produces the required logical signal of circuit working particularly and drives demonstration.Preferably, controller 304 descends the power consumption should be lower in working order, for example can select the chip microcontroller of super low-power consumption for use.
Nonvolatile memory 305 can be preserved unique sign (can be corresponding one by one with the global unique identification of the non-contact IC card that comprises this passive display unit) that controller 304 carries out the required logic of work, this passive display unit etc.Nonvolatile memory 305 can comprise ferroelectric memory (FRAM), EEPROM (EEPROM) etc.Be included in the controller 304 although in the drawings nonvolatile memory 305 is depicted as, they can be discrete parts.
Non-volatile display unit 306 comprises display driver and display medium.Displaying contents can keep under the situation of power down.Non-volatile display medium for example comprises based on Electronic Paper of electronic ink technologies etc.
Below, with the operation of describing above-mentioned contactless IC card system.
When non-contact IC card 200 (comprising passive display unit 300) get into that IC-card is read and the read-write scope of wireless base station apparatus 100 in the time, IC-card is read and the controller 103 of wireless base station apparatus 100 is controlled the global unique identification and the valid data of canned data in the label 210 that read circuits 101 read IC-card 200 such as this IC-card.Subsequently, 103 pairs of information that receive of controller are handled, and for example compare with the latest data of corresponding IC-card and upgrade etc.Then, the global unique identification of 105 pairs of IC-cards of controller 103 control wireless transmission circuit and the valid data after the processing are modulated and are sent through wireless signal such as radio-frequency carrier signal.
Energy capture circuit 303 is collected the wireless energy signal that sends from wireless transmission circuit 105 via antenna 301, and for whole passive display unit 300 WV is provided.Controller 304 powers on when receiving WV, and the work of control demodulator circuit 302, the information that the wireless signal that receives from wireless transmission circuit 105 via antenna 301 is carried out demodulation and wherein carried.This information for example comprises IC-card sign and valid data (for example, the IC-card valid data after the renewal reflect the last state of this IC-card).Controller 304 confirms whether this information is the information to this non-contact IC card 200.If this information is the information to this non-contact IC card 200, then controller 304 parses video data in order to show from this information; Controller 304 can also be stored in the IC-card valid data that comprise in this information in the nonvolatile memory 305.
Controller 304 can confirm whether the information that receives is the information to this non-contact IC card 200 through following steps.Particularly, controller 304 reading and saving compare in unique sign of the passive display unit of nonvolatile memory 305 and with IC-card sign in the information that receives.If comparative result shows that the two is corresponding each other, the information pointer that then receives is to this non-contact IC card 200, and controller sends to non-volatile display unit 306 with the video data in this information; If not corresponding, the INFORMATION IS NOT that then receives is directed against this non-contact IC card 200, and does not show.Non-volatile display unit 306 obtains video data, drives display medium and shows.
When IC-card leaves the read-write scope of IC-card reading and wireless base station apparatus 100, passive display unit 300 power down, but displaying contents remains on the non-volatile display medium.
According to embodiments of the invention; On the basis that does not change original non-contact IC card read-write capability; Through to IC-card additional passive display unit, increased passive Presentation Function to non-contact IC card, and the IC-card system that does not need one cover of exploitation separately to show.Like this, both guaranteed and existing non-contact IC card compatibility, realized passive Presentation Function simultaneously again.And erasing times is restriction not, and does not need the battery supplied energy, has solved the subject matter that present band shows that the IC-card field faces.
Abovely the present invention has been given explanation with reference to embodiments of the invention.But these embodiment only are for illustrative purposes, and are not in order to limit scope of the present invention.Scope of the present invention is limited accompanying claims and equivalent thereof.Do not depart from the scope of the present invention, those skilled in the art can make multiple replacement and modification, and these replacements and modification all should drop within the scope of the present invention.

Claims (11)

1. a non-contact IC card is read and wireless base station apparatus (100), comprising:
Read circuit (101) reads canned data in the non-contact IC card;
Controller (103) is controlled the operation of said non-contact IC card reading and wireless base station apparatus (100), and the information that is read is handled; And
Wireless transmission circuit (105) is sent the information after handling through wireless signal.
2. non-contact IC card as claimed in claim 1 is read and wireless base station apparatus (100), wherein,
The frequency of operation of read circuit (101) is 13.56MHz, 915MHz and/or 2.4GHz, and/or
The frequency of operation of wireless transmission circuit (105) is 13.56MHz, 915MHz and/or 2.4GHz.
3. non-contact IC card as claimed in claim 1 is read and wireless base station apparatus (100), wherein,
Read circuit (101) is deferred to the iso standard agreement of contact type intelligent card, and/or
Wireless transmission circuit (105) is deferred to the Physical layer of the iso standard agreement of utilizing contact type intelligent card and the application layer complementary agreement that derives from.
4. non-contact IC card as claimed in claim 1 is read and wireless base station apparatus (100), and wherein, the information that reads and/or the information of transmission comprise the sign and the valid data of said non-contact IC card.
5. non-contact IC card as claimed in claim 1 is read and wireless base station apparatus (100); Wherein, Said read circuit (101) and wireless transmission circuit (105) realize by same circuit module, and controller (103) is controlled this circuit module and between read circuit function and wireless transmission circuit function, switched.
6. passive display unit (300) that is used for non-contact IC card comprising:
Antenna (301) receives wireless signal from external device (ED);
Energy capture circuit (303), the energy of collection wireless signal is to produce the power that supplies said passive display unit work;
Demodulator circuit (302) carries out demodulation to the wireless signal that receives, to obtain the information that said wireless signal carries;
Controller (304) confirms that whether said information is to said non-contact IC card; And
Non-volatile display unit (306),
Wherein, controller (304) is directed against parsing and displaying data the information of said non-contact IC card from determined, and shows said video data through non-volatile display unit (306).
7. passive display unit as claimed in claim 6 (300) also comprises nonvolatile memory (305), is used to store the sign of passive display unit, and the sign of said passive display unit is corresponding with the sign of said non-contact IC card,
Wherein, the information that said wireless signal carries comprises IC-card sign and valid data, and
Said controller (304) reads the sign of the said passive display unit of storage in the said nonvolatile memory (305); And whether corresponding through the IC-card sign that comprises in the sign of judging said passive display unit and the information that receives, confirm that whether received information is to said non-contact IC card.
8. passive display unit as claimed in claim 7 (300); Wherein, The IC-card that in the sign of said passive display unit and the information that receives, comprises identifies under the corresponding situation, and said controller (304) is stored in the valid data that comprise in the received information in the said nonvolatile memory (305).
9. passive display unit as claimed in claim 6 (300), wherein, non-volatile display unit (306) comprises Electronic Paper.
10. a non-contact IC card (200) comprises passive display unit as claimed in claim 6 (300).
11. non-contact IC card as claimed in claim 10 (200) also comprises:
Label IC (210) wherein stores the sign and the valid data of said non-contact IC card; And
Antenna (201),
Wherein, via antenna (201) said label IC (210) is carried out read-write operation.
CN2011101478746A 2011-06-02 2011-06-02 IC (integrated circuit) card read and wireless transmission device, passive display unit and IC card Pending CN102810147A (en)

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CN103870850A (en) * 2012-12-10 2014-06-18 永奕科技股份有限公司 Electronic paper display device, processing module and data processing method thereof
CN104639182A (en) * 2013-11-15 2015-05-20 广州杰赛科技股份有限公司 Passive communication method
CN108319879A (en) * 2018-01-30 2018-07-24 河北吕望信息科技有限公司 One kind being based on I2The visible card and its method for information display of C agreements
WO2020010956A1 (en) * 2018-07-13 2020-01-16 深圳市文鼎创数据科技有限公司 Smart card peripheral apparatus, instruction processing method, electronic device and storage medium

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CN101964067A (en) * 2009-07-21 2011-02-02 深圳市江波龙电子有限公司 Wireless communication card, contactless card reading device and wireless communication system

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US20060176239A1 (en) * 2005-02-04 2006-08-10 Philip Morris Usa Inc. Display management system
JP2009122877A (en) * 2007-11-14 2009-06-04 Dainippon Printing Co Ltd Ic card with display function
CN101782958A (en) * 2009-01-15 2010-07-21 汉王科技股份有限公司 Digital display IC card system and operating method thereof
CN101964067A (en) * 2009-07-21 2011-02-02 深圳市江波龙电子有限公司 Wireless communication card, contactless card reading device and wireless communication system

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103870850A (en) * 2012-12-10 2014-06-18 永奕科技股份有限公司 Electronic paper display device, processing module and data processing method thereof
CN104639182A (en) * 2013-11-15 2015-05-20 广州杰赛科技股份有限公司 Passive communication method
CN108319879A (en) * 2018-01-30 2018-07-24 河北吕望信息科技有限公司 One kind being based on I2The visible card and its method for information display of C agreements
WO2020010956A1 (en) * 2018-07-13 2020-01-16 深圳市文鼎创数据科技有限公司 Smart card peripheral apparatus, instruction processing method, electronic device and storage medium

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Application publication date: 20121205