CN210295127U

CN210295127U - Fingerprint TF card

Info

Publication number: CN210295127U
Application number: CN201921479625.5U
Authority: CN
Inventors: 敖玉华
Original assignee: Hangzhou Zhian Technology Co ltd
Current assignee: Hangzhou Zhian Technology Co ltd
Priority date: 2019-09-06
Filing date: 2019-09-06
Publication date: 2020-04-10
Anticipated expiration: 2029-09-06

Abstract

The utility model relates to a fingerprint TF card, which comprises a main control driving chip module, a storage chip module, a fingerprint chip module, a circuit board, an interface contact module and a TF card; the main control driving chip module, the storage chip module and the fingerprint chip module are welded on the circuit board; the circuit board is an insulating plastic package body in the shape of a TF card and integrally formed by injection molding; the main control driving chip module, the storage chip module and the interface contact module are all arranged at the insertion end of the TF card, and the fingerprint chip module is arranged at the rear part of the TF card; the main control driving chip module is respectively and electrically connected with the storage chip module, the fingerprint chip module and the interface contact module. The utility model has the advantages that: the utility model discloses fingerprint TF card is provided with main control driver chip module, storage chip module and fingerprint chip module to the fingerprint that has unique characteristic carries out identification as encryption mode, and the operation is both convenient, is difficult to again be explaied, the effectual security performance that improves data storage.

Description

Fingerprint TF card

Technical Field

The utility model relates to a TF card field, concretely relates to fingerprint TF card.

Background

The original name of TF Card Trans-flash Card, generally referred to as Micro SD Card, is a very fine flash memory Card, and is a new generation memory device based on semiconductor flash memory, because of its excellent characteristics of small volume, fast data transmission speed, hot plugging, etc., it is widely used in portable devices such as electronic dictionary, mobile phone, digital camera, car navigation system, as flash memory disk, and is connected to SD Card slot through SD adapter Card, and can also be used as U disk by matching with TF Card reader. The TF card is popular with the general consumer group due to small volume, light weight and convenient carrying.

The TF card is often used to store various types of data, but in the environment where the network is highly popular, the disaster caused by important data leakage may be devastating, and for ordinary consumers, although the data stored in the hard disk or the computer is lost at ordinary times so as not to cause bad results, the problem of data security risks the users seriously, and everyone has the right and the requirement of protecting personal privacy. How to ensure the safety of the stored data of the TF card and not to be checked by others is more important. At present, the scheme of encryption storage is generally adopted in the market to realize the protection of stored data, and the scheme of encryption is numerous, and the following implementation modes are mainly adopted:

1. software encryption is the simplest one, and stored data is directly encrypted by purchasing encryption software; however, the encryption software is easy to crack, a one-key cracking method, an encryption file cracking course and the like are frequently used on the network, and the encryption function is similar to that of a dummy.

2. The communication and stored data are encrypted using a dedicated cryptographic chip. The chip supports international algorithms such as SM1-SM2, RSA, DES and the like specified by the national password administration. And the encryption algorithm is matched to realize full encryption in the processes of data communication, storage and the like. However, when the scheme is used, the processes of communication, storage and the like are complex, each link needs encryption and decryption, the read-write speed is influenced, the requirement on the computing capability of a chip is high, and the TF card is easily damaged or data is easily lost if the scheme is immature.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming not enough among the prior art, a fingerprint TF card is provided, still can insert current card reader read-write data, increase fingerprint collection wafer granule on TF card body, master control drive chip possesses the ability of carrying out fingerprint algorithm simultaneously, combine TF card and fingerprint together, realize only user's fingerprint matching back, the card reader just can visit the function of storage data, otherwise this card does not respond any communication command, this card can not be discerned to all card readers, reach the purpose of effective protection storage data.

The fingerprint TF card comprises a main control driving chip module, a storage chip module, a fingerprint chip module, a circuit board, an interface contact module and a TF card; the main control driving chip module, the storage chip module and the fingerprint chip module are welded on the circuit board; the circuit board is an insulating plastic package body in the shape of a TF card and integrally formed by injection molding; the main control driving chip module, the storage chip module and the interface contact module are all arranged at the insertion end of the TF card, and the fingerprint chip module is arranged at the rear part of the TF card; the main control driving chip module is respectively and electrically connected with the storage chip module, the fingerprint chip module and the interface contact module.

Preferably, the method comprises the following steps: the main control driving chip module, the storage chip module and the fingerprint chip module are welded on the front face of the circuit board, and the interface contact module is located on the back face of the circuit board.

Preferably, the method comprises the following steps: the shape of the fingerprint chip module is oval, round or rectangular.

Preferably, the method comprises the following steps: the TF card is in the shape of a common TF card or a strip shape which is longer than the shape of the common TF card.

Preferably, the method comprises the following steps: the master control driving chip module comprises a master control driving chip U3, wherein:

u3 pins

4, 18, 21, 41, and 63 as 3.3V voltage inputs;

u3 pins

14, 20, 35, 51, and 68 as 1.8V voltage inputs;

u3 pins

3, 10, 15, 19, 22, 34, 42, 52, 62, 64, and 69 are all grounded; two ends of the resistor R2 are respectively connected with the U3 pin 14 and a 3.3V power supply, one end of the capacitor C7 is connected with the U3 pin 14, and the other end of the capacitor C7 is grounded; two ends of a resistor R1 are respectively connected with a U3 pin 11 and a U3 pin 12, two ends of a crystal oscillator X1 are respectively connected with a U3 pin 11 and a U3 pin 12, one end of a capacitor C5 is connected with the U3 pin 11, the other end of the capacitor C5 is grounded, one end of a capacitor C6 is connected with the U3 pin 12, and the other end of the capacitor C6 is grounded.

Preferably, the method comprises the following steps: the memory chip module comprises a memory chip U2, wherein: u2 pins 12 and 37 as 3.3V voltage inputs; pins 13 and 36 of U2 are both grounded; the

U2 pins

19, 9, 18, 8, 7, 16 and 17 are respectively connected with the U3 pins 27, 39, 70, 28, 72, 73 and 74 of the master driving chip; the

U2 pins

29, 30, 31, 32, 41, 42, 43, and 44 are connected to the master driver chip U3 pins 29, 30, 31, 32, 33, 36, 37, and 38, respectively.

Preferably, the method comprises the following steps: the fingerprint chip module comprises a fingerprint chip U4, wherein:

u4 pins

9, 14, 39, 40, and 41 as 3.3V voltage inputs; pins 8, 10, 13, 37 and 49 of U4 are all grounded; pin 1 of U4 is connected with one end of a capacitor C8, and the other end of the capacitor C8 is grounded; the

U4 pins

5, 6, 48, 3 and 4 are connected to the master driver chip U3 pins 59, 60, 80, 1 and 2, respectively.

Preferably, the method comprises the following steps: the power chip U1 is soldered on the circuit board, wherein:

pins

4 and 5 of U1 serve as 3.3V voltage inputs; pin 3 of U1 is grounded; pin 1 of U1 is the output for 1.8V voltage;

pins

4 and 5 of U1 are connected with one end of a capacitor C3, and the other end of the capacitor C3 is grounded; the U1 pin 1 is respectively connected with one end of a capacitor C1 and one end of a capacitor C2, and the other end of the capacitor C1 and the other end of the capacitor C2 are both grounded.

Preferably, the method comprises the following steps: the interface contact module includes interface contacts J1, wherein: pin 4 of J1 is connected to voltage 3.3V; j1 pins 3 and 7 are both grounded;

pins

1, 5, 7 and 2 of the J1 are connected with pins 61, 47, 48 and 49 of the U3 of the master driving chip respectively.

Preferably, the method comprises the following steps: the capacitors C9, C10, C11, C12, C13 and C14 are arranged beside the power supply pins of the chip.

The utility model has the advantages that: the utility model discloses fingerprint TF card is provided with main control driver chip module, storage chip module and fingerprint chip module to the fingerprint that has unique characteristic carries out identification as encryption mode, and the operation is both convenient, is difficult to again be explaied, the effectual security performance that improves data storage. And as long as the added fingerprint is used for verification, all subsequent communication processes do not need to be encrypted any more, and the read-write speed of the stored data is not influenced.

Drawings

FIG. 1 is a schematic diagram of the structure of the fingerprint TF card of the present invention;

FIG. 2 is a block diagram of the fingerprint TF card system of the present invention;

FIG. 3 is a circuit diagram of an embodiment;

FIG. 4 is an outline diagram of a conventional TF card with an oval fingerprint chip module according to an embodiment;

FIG. 5 is a diagram of the outline of a conventional TF card with a circular fingerprint chip module according to an embodiment;

FIG. 6 is an outline diagram of a conventional TF card with a rectangular fingerprint chip module according to an embodiment;

FIG. 7 is an outline view of an embodiment of an elliptical fingerprint chip module special-shaped (strip-shaped) TF card;

FIG. 8 is an outline view of an embodiment of a round fingerprint chip module special-shaped (strip-shaped) TF card;

FIG. 9 is an outline view of an embodiment rectangular shaped (strip-shaped) TF card of a fingerprint chip module;

fig. 10 is a schematic diagram of a rectangular fingerprint chip module according to the embodiment of the invention, in which a strip-shaped TF card is inserted into a general TF card reader.

Description of reference numerals: the main control driver chip module 1, the memory chip module 2, the fingerprint chip module 3, the circuit board 4, the interface contact module 5, and the TF card 6.

Detailed Description

The present invention will be further described with reference to the following examples. The following description of the embodiments is merely provided to aid in understanding the invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.

As shown in fig. 3, the fingerprint TF card: mainly include main control driver chip module 1, memory chip module 2, fingerprint chip module 3, circuit board 4, interface contact module 5 and TF card 6, this fingerprint TF card possesses fingerprint collection, fingerprint comparison, fingerprint storage, TF card memory function simultaneously. When the fingerprint TF card is inserted into the general TF card reader, the TF card reader provides a 3.3V power supply for the fingerprint TF card, and stable work of a product is guaranteed.

The main control driving chip module 1, the storage chip module 2 and the fingerprint chip module 3 are all welded on the circuit board 4; the circuit board 4 is an insulating plastic package body in the shape of a TF card 6 which is integrally formed by injection molding; the main control driving chip module 1, the storage chip module 2 and the interface contact module 5 are all arranged at the insertion end of the TF card 6, and the fingerprint chip module 3 is arranged at the rear part of the TF card 6; the main control driving chip module 1 is electrically connected with the storage chip module 2, the fingerprint chip module 3 and the interface contact module 5 respectively.

The master control driving chip module 1 comprises a master control driving chip U3, the memory chip module 2 comprises a memory chip U2, the fingerprint chip module 3 comprises a fingerprint chip U4, and the interface contact module 5 comprises an interface contact J1.

Master control driver chip U3: the main control driving chip U3 is welded on the circuit board 4, is electrically connected with the memory chip U2 and the fingerprint chip U4, and is used for collecting and comparing images of fingerprints, receiving and sending stored data in the TF card and receiving and sending commands of other communications.

Memory chip U2: the memory chip U2 is soldered on the circuit board 4 and electrically connected with the main control driver chip U3 for storing the added fingerprint data and the data stored by the user in the TF card.

Fingerprint chip U4: the fingerprint chip U4 is welded on the circuit board 4, is electrically connected with the main control driving chip U3 and is used for collecting fingerprint images of users.

More specifically, the main control driver chip U3 may be an AS602 chip, and has 80 pins;

wherein: the

U3 pins

4, 18, 21, 41, 63 serve as 3.3V voltage inputs;

the

U3 pins

14, 20, 35, 51, 68 serve as 1.8V voltage inputs;

u3 pins

3, 10, 15, 19, 22, 34, 42, 52, 62, 64, 69 are all grounded;

the U3 pin 14 is connected with one end of a resistor R2 and one end of a capacitor C7, the other end of the resistor R2 is connected with a 3.3V power supply, and the other end of the capacitor C7 is grounded;

the pin 11 of the U3 is connected with one end of a resistor R1, one end of a crystal oscillator X1 and one end of a capacitor C5, the other end of the capacitor C5 is grounded, the pin 12 of the U3 is connected with the other end of a resistor R1, the other end of a crystal oscillator X1 and one end of a capacitor C6, and the other end of the capacitor C6 is grounded.

More specifically, the memory chip U2 may be a K9F4G08U0A chip having 48 pins;

wherein: pins 12 and 37 of U2 are used as 3.3V voltage input terminals;

both U2 pins 13, 36 are grounded;

pins

19, 9, 18, 8, 7, 16 and 17 of the U2 are respectively connected with pins 27, 39, 70, 28, 72, 73 and 74 of a main control drive chip U3;

the U2

pins

29, 30, 31, 32, 41, 42, 43, 44 are connected to the main control driver chip U3 pins 29, 30, 31, 32, 33, 36, 37, 38, respectively.

More specifically, the fingerprint chip module 3 can be made into a circle (as shown in fig. 5), a rectangle (as shown in fig. 6), an ellipse (as shown in fig. 4), etc. according to the structural size and shape of the actual fingerprint TF card; the fingerprint chip U4 may be an SF105 chip with 49 pins;

wherein: pins 9, 14, 39, 40, 41 of U4 serve as 3.3V voltage inputs;

pins 8, 10, 13, 37, 49 of U4 are all grounded;

pin 1 of U4 is connected with one end of a capacitor C8, and the other end of the capacitor C8 is grounded;

pins 5, 6, 48, 3 and 4 of the U4 are respectively connected with pins 59, 60, 80, 1 and 2 of the main control drive chip U3.

More specifically, the power supply chip U1 may be a PT5108-18 chip having 5 pins;

wherein: pins 4 and 5 of U1 are used as 3.3V voltage input ends; pin 3 of U1 is grounded; pin 1 of U1 is the output for 1.8V voltage;

pins

4 and 5 of U1 are connected with one end of a capacitor C3, and the other end of the capacitor C3 is grounded;

the pin 1 of the U1 is connected with one end of the capacitors C1 and C2, and the other ends of the capacitors C1 and C2 are both grounded.

More specifically, the circuit board 4 is integrally injection-molded to form an insulating plastic package body in the shape of a TF card; the fingerprint chip U4 is welded on the front surface of the circuit board 4, so that a user can press fingers conveniently. The shape of the TF card 6 is the shape of a traditional TF card (such as figures 4, 5 and 6) and can also be special-shaped (such as figures 7, 8 and 9).

More specifically, the interface contact J1 is located on the back side of the circuit board 4, so as to be inserted into a card reader slot and electrically connected with a corresponding metal reed of the card reader after contacting;

wherein: pin 4 of J1 is connected to voltage 3.3V; j1 pins 3 and 7 are grounded;

pins

1, 5, 7 and 2 of the J1 are respectively connected with pins 61, 47, 48 and 49 of the U3 of the master control driving chip.

More specifically, the circuit diagram of the embodiment further comprises 6 capacitors C9-C14, which are arranged beside the power supply pins of the chip and are mainly responsible for the filtering action of the 3.3V voltage.

The use method of the fingerprint TF card comprises the following steps:

1. add fingerprint, delete fingerprint:

the fingerprint adding device is characterized in that a fingerprint adding chip, namely a fingerprint chip U4, collects a user finger image, a master control driving chip U3 extracts fingerprint characteristics of the image, and fingerprint characteristic data are stored in a storage chip U2;

and when the fingerprint is deleted, the fingerprint characteristic data stored in the storage chip U2 is cleared by the master control drive chip U3.

2. When data stored in the TF card is to be read and written, a user presses an added finger, the fingerprint chip U4 collects a finger image of the user, the master control drive chip U3 extracts fingerprint characteristics from the image, the master control drive chip U3 compares the fingerprint characteristic data with effective fingerprint characteristic data stored in the storage chip U2 one by one, if the comparison is passed, all subsequent communication commands are normally responded, and normal reading and writing operations on the TF card can be completed; if the comparison is not passed, any subsequent command is not responded, and the purpose of reading the card and protecting the data is achieved.

The rectangular fingerprint chip module with the strip-shaped TF card inserted into the general TF card reader is shown in fig. 10. The matched TF card reader is a common TF card reader in the market. Avoid chooseing for use the opening less, can shelter from the card reader of fingerprint chip module. The special-shaped fingerprint TF card is large in size, and the problem cannot be caused during use.

Claims

1. A fingerprint TF card, characterized in that: the fingerprint card comprises a main control driving chip module (1), a storage chip module (2), a fingerprint chip module (3), a circuit board (4), an interface contact module (5) and a TF card (6); the main control driving chip module (1), the storage chip module (2) and the fingerprint chip module (3) are welded on the circuit board (4); the circuit board (4) is an insulating plastic package body which is integrally injection-molded and has the shape of a TF card (6); the main control driving chip module (1), the storage chip module (2) and the interface contact module (5) are all arranged at the insertion end of the TF card (6), and the fingerprint chip module (3) is arranged at the rear part of the TF card (6); the main control driving chip module (1) is electrically connected with the storage chip module (2), the fingerprint chip module (3) and the interface contact module (5) respectively.

2. The fingerprint TF card of claim 1, wherein: the main control driving chip module (1), the storage chip module (2) and the fingerprint chip module (3) are all welded on the front surface of the circuit board (4), and the interface contact module (5) is located on the back surface of the circuit board (4).

3. The fingerprint TF card of claim 1, wherein: the shape of the fingerprint chip module (3) is oval, circular or rectangular.

4. The fingerprint TF card of claim 1, wherein: the TF card (6) is in the shape of a common TF card or is in a strip shape which is longer than the shape of the common TF card.

5. The fingerprint TF card of claim 1, wherein: the master control driving chip module (1) comprises a master control driving chip U3, wherein: u3 pins 4, 18, 21, 41, and 63 as 3.3V voltage inputs; u3 pins 14, 20, 35, 51, and 68 as 1.8V voltage inputs; u3 pins 3, 10, 15, 19, 22, 34, 42, 52, 62, 64, and 69 are all grounded; two ends of the resistor R2 are respectively connected with the U3 pin 14 and a 3.3V power supply, one end of the capacitor C7 is connected with the U3 pin 14, and the other end of the capacitor C7 is grounded; two ends of a resistor R1 are respectively connected with a U3 pin 11 and a U3 pin 12, two ends of a crystal oscillator X1 are respectively connected with a U3 pin 11 and a U3 pin 12, one end of a capacitor C5 is connected with the U3 pin 11, the other end of the capacitor C5 is grounded, one end of a capacitor C6 is connected with the U3 pin 12, and the other end of the capacitor C6 is grounded.

6. The fingerprint TF card of claim 1, wherein: the memory chip module (2) comprises a memory chip U2, wherein: u2 pins 12 and 37 as 3.3V voltage inputs; pins 13 and 36 of U2 are both grounded; the U2 pins 19, 9, 18, 8, 7, 16 and 17 are respectively connected with the U3 pins 27, 39, 70, 28, 72, 73 and 74 of the master driving chip; the U2 pins 29, 30, 31, 32, 41, 42, 43, and 44 are connected to the master driver chip U3 pins 29, 30, 31, 32, 33, 36, 37, and 38, respectively.

7. The fingerprint TF card of claim 1, wherein: the fingerprint chip module (3) comprises a fingerprint chip U4, wherein: u4 pins 9, 14, 39, 40, and 41 as 3.3V voltage inputs; pins 8, 10, 13, 37 and 49 of U4 are all grounded; pin 1 of U4 is connected with one end of a capacitor C8, and the other end of the capacitor C8 is grounded; the U4 pins 5, 6, 48, 3 and 4 are connected to the master driver chip U3 pins 59, 60, 80, 1 and 2, respectively.

8. The fingerprint TF card of claim 1, wherein: the power supply chip U1 is welded on the circuit board (4), wherein: pins 4 and 5 of U1 serve as 3.3V voltage inputs; pin 3 of U1 is grounded; pin 1 of U1 is the output for 1.8V voltage; pins 4 and 5 of U1 are connected with one end of a capacitor C3, and the other end of the capacitor C3 is grounded; the U1 pin 1 is respectively connected with one end of a capacitor C1 and one end of a capacitor C2, and the other end of the capacitor C1 and the other end of the capacitor C2 are both grounded.

9. The fingerprint TF card of claim 1, wherein: the interface contact module (5) comprises interface contacts J1, wherein: pin 4 of J1 is connected to voltage 3.3V; j1 pins 3 and 7 are both grounded; pins 1, 5, 7 and 2 of the J1 are connected with pins 61, 47, 48 and 49 of the U3 of the master driving chip respectively.

10. The fingerprint TF card of claim 1, wherein: the capacitors C9, C10, C11, C12, C13 and C14 are arranged beside the power supply pins of the chip.