CN112418869A - Visual card with biological identification function - Google Patents
Visual card with biological identification function Download PDFInfo
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- CN112418869A CN112418869A CN202011307064.8A CN202011307064A CN112418869A CN 112418869 A CN112418869 A CN 112418869A CN 202011307064 A CN202011307064 A CN 202011307064A CN 112418869 A CN112418869 A CN 112418869A
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- 230000000007 visual effect Effects 0.000 title claims abstract description 33
- 230000002265 prevention Effects 0.000 claims description 13
- 230000002035 prolonged effect Effects 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- 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
- G06Q20/38—Payment protocols; Details thereof
- G06Q20/40—Authorisation, e.g. identification of payer or payee, verification of customer or shop credentials; Review and approval of payers, e.g. check credit lines or negative lists
- G06Q20/401—Transaction verification
- G06Q20/4014—Identity check for transactions
- G06Q20/40145—Biometric identity checks
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- 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
- G06Q20/355—Personalisation of cards for use
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
- H04B5/20—Near-field transmission systems, e.g. inductive or capacitive transmission systems characterised by the transmission technique; characterised by the transmission medium
- H04B5/24—Inductive coupling
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/80—Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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- Physics & Mathematics (AREA)
- General Business, Economics & Management (AREA)
- Signal Processing (AREA)
- Theoretical Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Computer Security & Cryptography (AREA)
- Finance (AREA)
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Abstract
The invention discloses a visual card with biological identification, which comprises a main control chip, a display chip, an electronic paper screen, an NFC module, a biological identification module and a battery module, wherein biological characteristic information is stored in the main control chip; when the card is swiped, the NFC module can be converted into the electric energy with external signal under the near field environment and be the main control chip power supply, and battery module can directly supply power to the main control chip, and after the main control chip circular telegram, biological identification module can acquire card holder's biological characteristic information, and the main control chip compares biological characteristic information that biological identification module acquireed with the biological characteristic information of storage, compares and can trade after passing. The visual card with the biological identification function has the advantages that the biological identification function is added, the safety is improved, the battery loss can be reduced through the combined design of the power supply module and the NFC module, the service life of the battery is prolonged, and the condition that enough current still exists to drive a screen under the condition that the external field strength is insufficient can be ensured, so that the normal display is ensured.
Description
Technical Field
The invention relates to the technical field of visual cards, in particular to a visual card with biological identification.
Background
The current visual card is divided into an active visual card and a passive visual card, the active visual card supplies power to the control chip through a power module arranged in the card to drive the electronic paper screen to display information, and the reading and writing are stable; the passive visual card has no built-in power supply, and the communication is realized by inducing an external signal through a built-in NFC module and converting the external signal into electric energy so as to read and write a screen.
The active visual card can not work normally at high temperature or low temperature, and the battery is disposable and can not be replaced. The battery life is 7-10 years, and the service life of the active visual card can be shorter in practical engineering according to the use times and use environment of the card.
The distance between the card and the reader-writer is limited because the passive visual card has no built-in power supply, and because of different card swiping habits of users, when the passive visual card is not close to the reader-writer for enough time and too far distance or the card is moved in the card swiping process, the induced current is easily too small to drive a display screen to display digital information. The transaction time is relatively short while the card is in transaction, and the transaction is complete enough even if the user removes the card immediately proximate to the POS. However, the control screen of the card has a long display time which is more than 1S, so that if the user removes the card immediately after the card is close to the POS machine, the flow is not finished, the transaction fails, even the screen only displays half, and messy codes which are not displayed are remained on the screen. Therefore, the method brings trouble to the user and brings bad user experience.
Disclosure of Invention
The invention aims to provide a visual card with biological identification, which can reduce battery loss and has long service life.
In order to solve the problems, the invention provides a visual card with biological identification, which comprises a main control chip, a display chip, an electronic paper screen, an NFC module, a biological identification module and a battery module, wherein the battery module, the main control chip, the display chip and the electronic paper screen are sequentially connected, the NFC module and the biological identification module are both connected with the main control chip, and biological characteristic information is stored in the main control chip;
when the card is swiped, the NFC module can convert an external signal into electric energy in a near-field environment to supply power to the main control chip, the battery module can directly supply power to the main control chip, after the main control chip is electrified, the biological identification module can acquire biological characteristic information of a card holder, the main control chip compares the biological characteristic information acquired by the biological identification module with stored biological characteristic information, and the transaction can be carried out after the comparison is passed;
during transaction, the main control chip transmits electric energy to the display chip, the display chip drives the electronic paper screen to display, and when the NFC module and the battery module can supply power, the NFC module is preferentially used for supplying power.
As a further improvement of the present invention, the NFC module includes an NFC chip, an NFC coil, and an NFC power supply circuit, the battery module comprises a battery and a battery power supply circuit, the NFC power supply circuit comprises a rectifier tube D3, the alternating current obtained by the NFC coil is converted into direct current through a rectifier tube D3 and is supplied to the main control chip, the battery power supply circuit comprises a resistor R1, a resistor R2, an NMOS transistor Q1 and a PMOS transistor Q2, wherein a first end of the resistor R1 and an S end of the PMOS transistor Q2 are connected with the anode of the battery, the negative pole ground connection of battery, the electric energy of battery is offered by PMOS pipe Q2 ' S D end the main control chip, PMOS pipe Q2 ' S G end and NMOS pipe Q1 ' S D end all are connected with resistance R1 ' S second end, NMOS pipe Q1 ' S S end ground connection, NMOS pipe Q1 ' S G end and resistance R2 ' S second end all are connected with the enable signal end, the enable signal of enable signal end by the main control chip output.
As a further improvement of the present invention, the NFC power supply circuit further includes a backflow prevention diode D2, and the rectifier tube D3 is connected to the main control chip through the backflow prevention diode D2.
As a further improvement of the present invention, the battery power supply circuit further includes a backflow prevention diode D1, and the D terminal of the PMOS transistor Q2 is connected to the main control chip through the backflow prevention diode D1.
As a further improvement of the present invention, the supply voltage of the NFC module is greater than the supply voltage of the battery module, and when both the NFC module and the battery module can supply power, a module with a high supply voltage is preferentially used for supplying power.
As a further improvement of the invention, the supply voltage of the NFC module is 4V-4.5V, and the supply voltage of the battery module is 3V-3.7V.
As a further improvement of the invention, the biological characteristic information comprises fingerprints and human faces.
The invention has the beneficial effects that:
the visual card with the biological identification function has the advantages that the biological identification function is added, the safety is improved, the battery loss can be reduced through the combined design of the power supply module and the NFC module, the service life of the battery is prolonged, and the condition that enough current still exists to drive a screen under the condition that the external field strength is insufficient can be ensured, so that the normal display is ensured.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented in accordance with the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more clearly understood, the following preferred embodiments are described in detail with reference to the accompanying drawings.
Drawings
FIG. 1 is a schematic diagram of a visual card with biometric identification according to a preferred embodiment of the present invention;
fig. 2 is a circuit diagram of the NFC power supply circuit and the battery power supply circuit in the visual card with biometric identification in the preferred embodiment of the present invention.
Detailed Description
The present invention is further described below in conjunction with the following figures and specific examples so that those skilled in the art may better understand the present invention and practice it, but the examples are not intended to limit the present invention.
As shown in fig. 1, the visual card with biometric identification in the preferred embodiment of the present invention includes a main control chip, a display chip, an electronic paper screen, an NFC module, a biometric identification module, and a battery module, where the battery module, the main control chip, the display chip, and the electronic paper screen are connected in sequence, the NFC module and the biometric identification module are both connected to the main control chip, and biometric feature information is stored in the main control chip.
When the card is swiped, the NFC module can be converted into the electric energy with external signal under the near field environment and be the main control chip power supply, and battery module can directly supply power to the main control chip, and after the main control chip circular telegram, biological identification module can acquire card holder's biological characteristic information, and the main control chip compares biological characteristic information that biological identification module acquireed with the biological characteristic information of storage, compares and can trade after passing.
During the transaction, main control chip transmits the electric energy to display chip, and display chip drive electron paper screen shows, when NFC module and battery module all can supply power, preferentially uses the NFC module to supply power.
In the present embodiment, the biometric information includes a fingerprint, a human face, and the like.
In this embodiment, the supply voltage of the NFC module is greater than the supply voltage of the battery module, and when both the NFC module and the battery module can supply power, the module with the higher supply voltage is preferentially used for supplying power. Further, the supply voltage of the NFC module is 4V-4.5V, and the supply voltage of the battery module is 3V-3.7V.
In this embodiment, the NFC module includes an NFC chip, an NFC coil, and an NFC power supply circuit, and the battery module includes a battery and a battery power supply circuit.
As shown in fig. 2, the NFC power supply circuit includes a rectifier tube D3, the ac power obtained by the NFC coil is converted into dc power through a rectifier tube D3 and is provided to the main control chip, the battery power supply circuit includes a resistor R1, a resistor R2, an NMOS tube Q1 and a PMOS tube Q2, the first end of the resistor R1 and the S end of the PMOS tube Q2 are connected to the positive electrode of the battery, the negative electrode of the battery is grounded, the electric energy of the battery is provided to the main control chip from the D end of the PMOS tube Q2, the G end of the PMOS tube Q2 and the D end of the NMOS tube Q1 are both connected to the second end of the resistor R1, the S end of the NMOS tube Q1 is grounded, the G end of the NMOS tube Q1 and the second end of the resistor R2 are both connected to an enable signal terminal, and the enable signal BATT _ ON at the enable.
Because the battery can not directly supply power to the control chip, otherwise, the control chip consumes power all the time when the card is not used, although the control chip can enter the sleep mode, the control chip also has leakage current of about 100uA, which is already a relatively large power consumption for the visible card, and therefore, the NMOS transistor Q1 and the PMOS transistor Q2 are used as switches of the battery.
In this embodiment, the NFC power supply circuit further includes a backflow prevention diode D2, and the rectifier tube D3 is connected to the main control chip through the backflow prevention diode D2. The battery power supply circuit further comprises a backflow prevention diode D1, and the D end of the PMOS tube Q2 is connected with the main control chip through the backflow prevention diode D1. Because the power is supplied by two power supplies, if the two power supplies are connected together, the current backflow abnormity can occur due to different voltages, and therefore the backflow prevention diodes D1 and D2 are used for preventing the current from flowing backwards.
The working logic of the visual card in this embodiment is as follows:
when the visible card does not enter the NFC field, the control chip does not operate, the level of BATT _ ON is pulled to ground by the resistor R2, that is, the low level, Vgs of the NMOS transistor Q1 is 0, the NMOS transistor Q1 is turned off, it can be further obtained that Vgs of the PMOS transistor Q2 is 0, the PMOS transistor Q2 is turned off, that is, the electric energy of the battery cannot be provided to the control chip backwards.
When the visible card enters an NFC field, the control chip obtains electric energy from the NFC coil, starts to work, and simultaneously pulls up the enable signal BATT _ ON to open the NMOS tube Q1 and the PMOS tube Q2, so that the battery can supply power to the control chip.
After the electronic paper screen executes the display process, the control chip pulls the control signal BATT _ ON low, so that if the visual card is removed from the field, the battery can not supply power to the control chip, and the total use time of the battery is prolonged.
Specifically, when the visual card approaches the POS machine, the transaction is completed within a short time, then the display flow is processed, and if the display flow is not completed, the visual card is removed, and the display flow is ensured to be completed by battery power supply.
The visual card with the biological identification function is added with the biological identification function, and the transaction can be carried out after the identification is carried out, so that the safety is improved. Furthermore, through the combined design of the power module and the NFC module, the battery loss can be reduced, the service life of the battery is prolonged, and the screen can still be driven by enough current under the condition that the external field strength is not enough, so that normal display is ensured.
The above embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. The equivalent substitution or change made by the technical personnel in the technical field on the basis of the invention is all within the protection scope of the invention. The protection scope of the invention is subject to the claims.
Claims (7)
1. A visual card with biological identification is characterized by comprising a main control chip, a display chip, an electronic paper screen, an NFC module, a biological identification module and a battery module, wherein the battery module, the main control chip, the display chip and the electronic paper screen are sequentially connected, the NFC module and the biological identification module are both connected with the main control chip, and biological characteristic information is stored in the main control chip;
when the card is swiped, the NFC module can convert an external signal into electric energy in a near-field environment to supply power to the main control chip, the battery module can directly supply power to the main control chip, after the main control chip is electrified, the biological identification module can acquire biological characteristic information of a card holder, the main control chip compares the biological characteristic information acquired by the biological identification module with stored biological characteristic information, and the transaction can be carried out after the comparison is passed;
during transaction, the main control chip transmits electric energy to the display chip, the display chip drives the electronic paper screen to display, and when the NFC module and the battery module can supply power, the NFC module is preferentially used for supplying power.
2. The visual card with biometric identification of claim 1, wherein the NFC module includes an NFC chip, an NFC coil, and an NFC power supply circuit, the battery module comprises a battery and a battery power supply circuit, the NFC power supply circuit comprises a rectifier tube D3, the alternating current obtained by the NFC coil is converted into direct current through a rectifier tube D3 and is supplied to the main control chip, the battery power supply circuit comprises a resistor R1, a resistor R2, an NMOS transistor Q1 and a PMOS transistor Q2, wherein a first end of the resistor R1 and an S end of the PMOS transistor Q2 are connected with the anode of the battery, the negative pole ground connection of battery, the electric energy of battery is offered by PMOS pipe Q2 ' S D end the main control chip, PMOS pipe Q2 ' S G end and NMOS pipe Q1 ' S D end all are connected with resistance R1 ' S second end, NMOS pipe Q1 ' S S end ground connection, NMOS pipe Q1 ' S G end and resistance R2 ' S second end all are connected with the enable signal end, the enable signal of enable signal end by the main control chip output.
3. The visual card with biometric identification of claim 2, wherein the NFC power supply circuit further includes a backflow prevention diode D2, and the rectifier tube D3 is connected to the main control chip through the backflow prevention diode D2.
4. The visual card with biometric identification of claim 2, wherein the battery power supply circuit further includes a back-flow prevention diode D1, and the D terminal of the PMOS transistor Q2 is connected to the main control chip through the back-flow prevention diode D1.
5. The visual card with biometric identification of claim 1, wherein the supply voltage of the NFC module is greater than the supply voltage of the battery module, and when both the NFC module and the battery module can supply power, the module with the higher supply voltage is preferentially used for supplying power.
6. The visual card with biometric identification according to claim 5, wherein the supply voltage of the NFC module is 4V-4.5V, and the supply voltage of the battery module is 3V-3.7V.
7. The visual card with biometric identification of claim 1, wherein the biometric information includes a fingerprint, a human face.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011307064.8A CN112418869A (en) | 2020-11-19 | 2020-11-19 | Visual card with biological identification function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011307064.8A CN112418869A (en) | 2020-11-19 | 2020-11-19 | Visual card with biological identification function |
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| Publication Number | Publication Date |
|---|---|
| CN112418869A true CN112418869A (en) | 2021-02-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011307064.8A Pending CN112418869A (en) | 2020-11-19 | 2020-11-19 | Visual card with biological identification function |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102542323A (en) * | 2010-11-16 | 2012-07-04 | 北京中电华大电子设计有限责任公司 | Multifunctional visual intelligent card |
| CN107025483A (en) * | 2017-04-25 | 2017-08-08 | 飞天诚信科技股份有限公司 | A kind of visible card and its method of work |
| CN109285251A (en) * | 2018-09-12 | 2019-01-29 | 深圳市视美泰技术股份有限公司 | Intelligent and safe lock and logistic transportation supervision system |
| CN109823081A (en) * | 2019-03-12 | 2019-05-31 | 中国工商银行股份有限公司 | A kind of bank book, self-service passbook printing device, system and method |
| CN209895348U (en) * | 2019-06-03 | 2020-01-03 | 广州市天驰测绘技术有限公司 | Handheld device capable of adjusting RFID card identification distance |
-
2020
- 2020-11-19 CN CN202011307064.8A patent/CN112418869A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102542323A (en) * | 2010-11-16 | 2012-07-04 | 北京中电华大电子设计有限责任公司 | Multifunctional visual intelligent card |
| CN107025483A (en) * | 2017-04-25 | 2017-08-08 | 飞天诚信科技股份有限公司 | A kind of visible card and its method of work |
| CN109285251A (en) * | 2018-09-12 | 2019-01-29 | 深圳市视美泰技术股份有限公司 | Intelligent and safe lock and logistic transportation supervision system |
| CN109823081A (en) * | 2019-03-12 | 2019-05-31 | 中国工商银行股份有限公司 | A kind of bank book, self-service passbook printing device, system and method |
| CN209895348U (en) * | 2019-06-03 | 2020-01-03 | 广州市天驰测绘技术有限公司 | Handheld device capable of adjusting RFID card identification distance |
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