CN106445266A - A mobile phone glass window protective screen fingerprint recognition component and preparation method thereof - Google Patents

Abstract

A fingerprint identification component of a mobile phone glass window protective screen and a preparation method thereof. The invention belongs to the technical field of information safety, and particularly relates to a fingerprint identification component of a mobile phone glass window protective screen and a preparation method thereof. The fingerprint identification component of the mobile phone glass window protective screen comprises a fingerprint identification chip, a flexible circuit board and a scratch-resistant film; the fingerprint identification chip comprises a fingerprint identification unit, a fingerprint touch sensor and a printed circuit hard board. The fingerprint identification component is additionally arranged on the mobile phone, so that the safety and the privacy of the use authentication of the mobile phone are enhanced. The fingerprint identification function simplifies unlocking operation, and avoids the problem of mobile phone locking caused by multiple inputs. The scratch-resistant film on the fingerprint identification assembly provided by the invention reduces the problem of reduced identification capability caused by scratching of the key in the long-time use process.

Description

A mobile phone glass window protective screen fingerprint recognition component and preparation method thereof

technical field

The invention belongs to the technical field of information security, and in particular relates to a mobile phone glass window protective screen fingerprint identification component and a preparation method thereof.

Background technique

With the intelligentization and popularization of mobile terminals, the functions of mobile terminals used by the public are becoming more and more colorful, and mobile learning and mobile applications have emerged as the times require. Then when the public uses various mobile terminal applications, many applications need to determine the identity of the holder. At this time, relying solely on digital passwords and gesture encryption can no longer meet market needs, and there are loopholes that can be bypassed. If the mobile phone is lost or stolen, it is likely to cause even greater losses.

Fingerprint identification modules are more and more widely used in smartpone, ipad, laptop, computer, car and other products due to their characteristics of security, stability, uniqueness, and convenience of mobile payment. From 2014 to 2015, fingerprint identification modules Module configuration From the perspective of mobile phones, the fingerprint identification module is in a state of vigorous development.

The fingerprint collection machine has almost no communication capability. When collecting a large number of fingerprints, it can only be stored in the memory card first, and then be sorted out uniformly, which is time-consuming and laborious. With the development of wireless communication technology and smart phones, the processing speed of mobile phones is getting faster and faster, and the compatibility and programmability of operating systems are getting higher and higher; wireless communication technology, especially near field communication technology makes the transmission rate more and more All of these provide solutions for solving the above problems.

With the development of electronic technology, in order to improve security, terminals (such as mobile phones, tablet computers, etc.) usually integrate the function of fingerprint recognition, through fingerprint recognition, the terminal can be unlocked, the application can be started, or some functions in the application can be executed . For example, when the terminal is in standby mode, fingerprint recognition can be used to unlock the locked terminal, or start applications such as WeChat and QQ in the terminal, or complete applications such as fingerprint payment through fingerprint recognition.

At present, the mobile phones used by people usually do not have a mobile phone lock or a mobile phone lock with a set password. For the former, the protection of user privacy and security is quite low. Once lost, the user's privacy is very easy to be known; for the latter, Every time you open the phone, you need to enter the password. If you make a mistake, you need to re-enter it. Even if you enter it multiple times, the phone will be locked. What's more, the password that has not been used for a long time will sometimes be forgotten, which is quite inconvenient.

Contents of the invention

The invention solves the problem of difficult fingerprint recognition caused by locked mobile phone due to multiple input of passwords and serious button wear, and provides a mobile phone glass window protective screen fingerprint recognition component and a preparation method thereof.

A mobile phone glass window protection screen fingerprint identification assembly of the present invention includes a fingerprint identification chip, a metal ring, a flexible circuit board and a scratch-resistant film;

The fingerprint identification chip includes a fingerprint identification unit, a fingerprint touch sensor and a printed circuit hard board;

The fingerprint identification unit includes a fingerprint collection module, a fingerprint storage module, a fingerprint processing module and a fingerprint matching module;

The fingerprint identification unit is arranged on the fingerprint touch sensor;

The fingerprint touch sensor is arranged on the surface of the printed circuit hard board;

The metal ring is sleeved on the outside of the fingerprint identification chip;

The anti-scratch film covers the fingerprint identification chip.

A kind of preparation method of mobile phone glass window protection screen fingerprint identification assembly of the present invention is carried out according to the following steps:

1. Connect the fingerprint touch sensor on the surface of the printed circuit hard board;

2. Connect the fingerprint identification unit to the fingerprint touch sensor to obtain the fingerprint identification chip;

3. Install a metal ring outside the fingerprint identification chip;

4. Paste a layer of anti-scratch film on the surface of the fingerprint recognition chip;

5. The fingerprint identification chip and the flexible circuit board are electrically connected to obtain a mobile phone glass window protective screen fingerprint identification component.

Beneficial effects of the present invention:

The fingerprint identification component of the invention is added to the mobile phone, which enhances the security and privacy of the mobile phone authentication.

The fingerprint recognition function simplifies the unlocking operation and avoids multiple input that will cause the phone to lock.

The anti-scratch film on the fingerprint identification component of the present invention reduces the problem of degradation of identification ability caused by scratches on keys during long-term use.

Description of drawings

Fig. 1 is the structure schematic diagram of the mobile phone glass window protection screen fingerprint identification assembly of the present invention; Wherein 1 is fingerprint identification chip, 2 is fingerprint identification unit, 3 is fingerprint touch sensor, 4 is metal ring, 5 is printed circuit hard board, 6 is a flexible circuit board, and 7 is a scratch-resistant film;

Fig. 2 is a structural schematic diagram of a fingerprint identification chip; wherein 2 is a fingerprint identification unit, 3 is a fingerprint touch sensor, and 5 is a printed circuit hard board;

Fig. 3 is a structural schematic diagram of a circular scratch-resistant film.

detailed description

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 1. A mobile phone glass window protection screen fingerprint identification assembly in this embodiment includes a fingerprint identification chip 1, a metal ring 4, a flexible circuit board 6 and a scratch-resistant film 7;

The fingerprint identification chip 1 includes a fingerprint identification unit 2, a fingerprint touch sensor 3 and a printed circuit hard board 5;

The fingerprint recognition unit 2 includes a fingerprint collection module, a fingerprint storage module, a fingerprint processing module and a fingerprint matching module;

The fingerprint identification unit 2 is arranged on the fingerprint touch sensor 3;

The fingerprint touch sensor 3 is arranged on the surface of the printed circuit board 5;

The metal ring 4 is sleeved on the outside of the fingerprint identification chip 1;

The anti-scratch film 7 covers the fingerprint recognition chip 1 .

The fingerprint identification component of this embodiment is added to the mobile phone, which enhances the security and privacy of the mobile phone authentication.

The fingerprint recognition function simplifies the unlocking operation and avoids multiple input that will cause the phone to lock.

The anti-scratch film on the fingerprint identification component of this embodiment reduces the problem of degradation of identification ability caused by scratches on keys during long-term use.

Embodiment 2: This embodiment differs from Embodiment 1 in that: the gap between the outside of the fingerprint recognition chip 1 and the inside of the metal ring 4 is filled with sealant. Other steps and parameters are the same as those in the first embodiment.

Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the fingerprint touch sensor 3 is a capacitive touch sensor, specifically a variable pole pitch capacitive sensor, a variable area capacitive sensor, and a variable dielectric constant sensor. One of the capacitive sensors. Other steps and parameters are the same as those in Embodiment 1 or 2.

Embodiment 4: This embodiment differs from Embodiments 1 to 3 in that: the metal ring 4 is a stainless steel ring. Other steps and parameters are the same as those in the first to third specific embodiments.

Embodiment 5: This embodiment is different from Embodiment 1 to Embodiment 4 in that: the fingerprint identification chip 1 is electrically connected to the flexible circuit board 6 . Other steps and parameters are the same as in one of the specific embodiments 1 to 4.

Embodiment 6: This embodiment differs from Embodiments 1 to 5 in that: the fingerprint recognition chip 1 is connected to the flexible circuit board 6 through SMT solder paste. Other steps and parameters are the same as one of the specific embodiments 1 to 5.

Embodiment 7: This embodiment is different from Embodiment 1 to Embodiment 6 in that: the anti-scratch film 7 is made of a material with a Mohs hardness of 9H. Other steps and parameters are the same as one of the specific embodiments 1 to 6.

Embodiment 8: This embodiment differs from Embodiments 1 to 7 in that: the anti-scratch film 7 is a film made of aluminum oxide or silicon carbide or a sapphire film. Other steps and parameters are the same as one of the specific embodiments 1 to 7.

Embodiment 9: This embodiment is different from Embodiment 1 to Embodiment 8 in that: the thickness of the anti-scratch film 7 is 10 μm-20 μm. Other steps and parameters are the same as one of the specific embodiments 1 to 8.

Specific Embodiment Ten: The method for measuring groove depth with a groove depth measuring device in this embodiment is carried out according to the following steps:

1. Connect the fingerprint touch sensor 3 on the surface of the printed circuit hard board 5;

2. Connect the fingerprint recognition unit 2 on the fingerprint touch sensor 3 to obtain the fingerprint recognition chip 1;

3. Install a metal ring 4 outside the fingerprint identification chip 1;

4. Paste a layer of anti-scratch film 7 on the surface of the fingerprint identification chip 1;

5. The fingerprint identification chip 1 and the flexible circuit board 6 are electrically connected to obtain a fingerprint identification component of the mobile phone glass window protection screen.

Further, the fingerprint identification unit 2 includes a fingerprint collection module, a fingerprint storage module, a fingerprint processing module and a fingerprint matching module.

Further, the fingerprint touch sensor 3 is a capacitive touch sensor, specifically one of a variable pole pitch capacitive sensor, a variable area capacitive sensor, and a variable dielectric constant capacitive sensor.

Further, the gap between the outside of the fingerprint identification chip 1 and the inside of the metal ring 4 is filled with sealant.

Further, the metal ring 4 is a stainless steel ring.

Further, the fingerprint identification chip 1 is electrically connected to the flexible circuit board 6 .

Further, the fingerprint recognition chip 1 is connected to the flexible circuit board 6 through SMT solder paste.

Further, the anti-scratch film 7 is a film made of a material with a Mohs hardness of 9H.

Further, the anti-scratch film 7 is a film made of aluminum oxide or silicon carbide or a sapphire film.

Further, the thickness of the anti-scratch film 7 is 10 μm-20 μm.

Verify effect of the present invention with following test

Test 1. (Combined with Figures 1~3) A mobile phone glass window protective screen fingerprint recognition component in this test includes a fingerprint recognition chip 1, a metal ring 4, a flexible circuit board 6 and a scratch-resistant film 7;

The fingerprint identification chip 1 includes a fingerprint identification unit 2, a fingerprint touch sensor 3 and a printed circuit hard board 5;

The fingerprint recognition unit 2 includes a fingerprint collection module, a fingerprint storage module, a fingerprint processing module and a fingerprint matching module;

The fingerprint identification unit 2 is arranged on the fingerprint touch sensor 3;

The fingerprint touch sensor 3 is arranged on the surface of the printed circuit board 5;

The metal ring 4 is sleeved on the outside of the fingerprint identification chip 1;

The anti-scratch film 7 covers the fingerprint recognition chip 1 .

The fingerprint touch sensor 3 is a variable-pole-pitch capacitive sensor.

The gap between the outside of the fingerprint identification chip 1 and the inside of the metal ring 4 is filled with sealant.

The metal ring 4 is a stainless steel ring.

The fingerprint identification chip 1 is connected to the flexible circuit board 6 through SMT solder paste.

The scratch-resistant film 7 is a sapphire film.

The thickness of the sapphire film is 20 μm.

The sapphire film is covered on the fingerprint identification chip 1 by molding.

In this test, the fingerprint identification unit 2 includes a fingerprint collection module, a fingerprint storage module, a fingerprint processing module and a fingerprint matching module;

Specifically, the working principle of the fingerprint identification unit 2:

After the mobile phone receives the fingerprint collection command, it calls the camera of the terminal to obtain the collection image including the fingerprint image;

Extracting the fingerprint image from the collected image, and preprocessing the fingerprint image through the fingerprint processing module, and then entering the fingerprint matching module to obtain a fingerprint comparison image;

determining whether the fingerprint comparison image matches a preset fingerprint image;

If the fingerprint comparison image matches the preset fingerprint image, a preset operation is performed according to a preset condition.

Specifically, after receiving the fingerprint collection instruction, before calling the camera of the terminal to obtain the collection image including the fingerprint image, the step of obtaining the preset fingerprint image specifically includes:

After receiving the fingerprint collection instruction, call the camera of the terminal to obtain the original image including the fingerprint image;

extracting the fingerprint image from the original image, and preprocessing the fingerprint image extracted from the original image to obtain a preset fingerprint image;

The preset fingerprint image is saved in the fingerprint storage module.

Specifically, storing the preset fingerprint image in the storage module includes:

Encrypting the preset fingerprint image,

The encrypted preset fingerprint image is saved in the fingerprint storage module.

Specifically, judging whether the fingerprint comparison image matches the preset fingerprint image; including:

Decrypt the encrypted preset fingerprint image stored in the fingerprint storage module;

Comparing the fingerprint comparison image with the decrypted preset fingerprint image to determine whether the comparison fingerprint image matches the preset fingerprint image.

In this test, the fingerprint identification unit 2 communicates with the mobile phone through a serial port or a parallel port. When the user sends an instruction to the mobile phone, the mobile phone will send a command to the fingerprint processing module to request fingerprint feature values, and the fingerprint processing module starts fingerprint collection. The module collects fingerprints. The fingerprint collection module detects the fingerprint and returns it to the fingerprint processing module. The fingerprint processing module performs preprocessing and feature value extraction on the collected fingerprints and returns it to the mobile phone. The mobile phone uses the fingerprint matching module to compare the information with the pre-stored fingerprint. value for comparison.

This fingerprint identification method is loaded in the mobile phone to prevent the mobile phone from being stolen or lost.

For example, a code that requires fingerprint identification can be added in the boot program of the mobile phone or before some key programs are called, so that even if the mobile phone is lost or stolen, others cannot use the mobile phone. The pre-stored fingerprints for comparison can be burned when purchasing the mobile phone In FLASH, the mobile phone sends a command to the fingerprint recognition unit to compare fingerprints, and the fingerprint recognition unit starts the fingerprint collection module for fingerprint collection. After the fingerprint collection module detects the fingerprint, it returns to the fingerprint processing module. Fingerprint matching module, the fingerprint processing module preprocesses the detected fingerprints and extracts feature values, and then sends them to the fingerprint matching module in the mobile phone, and the fingerprint matching module combines the fingerprints read from the fingerprint processing module and the fingerprints stored in the mobile phone Make a comparison, if the comparison passes, go to the next step, if not, return.

In this experiment, the fingerprint identification circuit unit 2 is mainly used to identify fingerprint information and feed it back to the fingerprint touch sensor 3 . The fingerprint identification unit 2 and the fingerprint touch sensor 3 can read fingerprint information through active capacitive coupling, electromagnetic coupling, optical sensing, infrared sensing or other means.

Specifically, the stainless steel ring 4 is arranged in the gap between the outside of the fingerprint recognition chip 1 and the inside of the metal ring 4 and filled with sealant. the periphery. Adding the stainless steel ring 4 around the fingerprint identification chip 1 can play an anti-static effect on the one hand, and can also improve the fixing stability of the fingerprint identification unit 2 on the other hand, and can also play the role of increasing the appearance.

When performing fingerprint identification, when the finger is attached to the home button of the mobile phone, the fingerprint identification unit 2 and the fingerprint touch sensor 3 can perform fingerprint identification. The fingerprint identification unit 2 and the fingerprint touch sensor 3 can read fingerprint information through active capacitive coupling, electromagnetic coupling, optical sensing, infrared sensing or other means.

In this test, the sapphire thin film is used to improve the hardness to achieve better protection for the fingerprint recognition chip. The material of the thin film has high hardness, and the sapphire thin film belongs to a part of the fingerprint recognition chip, is not easy to break, and can well play a protective role. The sapphire thin film has a relatively thin thickness without sacrificing hardness and playing a protective role, which can increase the sensitivity of fingerprint identification and improve user experience.

Specifically, the top view surface of the sapphire film can be circular, oval or square.

In this test, the planar surface of the sapphire thin film is circular.

Claims (10)

1. A mobile phone glass window protective screen fingerprint recognition component, characterized in that a mobile phone glass window protective screen fingerprint recognition component includes a fingerprint recognition chip (1), a metal ring (4), a flexible circuit board (6) and a scratch-resistant film (7); The fingerprint identification chip (1) includes a fingerprint identification unit (2), a fingerprint touch sensor (3) and a printed circuit hard board (5); The fingerprint recognition unit (2) includes a fingerprint collection module, a fingerprint storage module, a fingerprint processing module and a fingerprint matching module; The fingerprint identification unit (2) is arranged on the fingerprint touch sensor (3); The fingerprint touch sensor (3) is arranged on the surface of the printed circuit hard board (5); The metal ring (4) is sleeved on the outside of the fingerprint identification chip (1); The anti-scratch film (7) covers the fingerprint recognition chip (1). 2. A mobile phone glass window protective screen fingerprint recognition assembly according to claim 1, characterized in that the gap between the outside of the fingerprint recognition chip (1) and the inside of the metal ring (4) is filled with sealant. 3. A mobile phone glass window protective screen fingerprint recognition component according to claim 1, characterized in that the fingerprint touch sensor (3) is a capacitive touch sensor, specifically a variable pole pitch capacitive sensor, a variable area capacitor One of sensor and variable permittivity capacitive sensor. 4. A mobile phone glass window protective screen fingerprint identification assembly according to claim 1, characterized in that the metal ring (4) is a stainless steel ring. 5. A fingerprint identification component for a mobile phone glass window protective screen according to claim 1, characterized in that the fingerprint identification chip (1) is electrically connected to the flexible circuit board (6). 6. A fingerprint identification component for a mobile phone glass window protection screen according to claim 1, characterized in that the fingerprint identification chip (1) is connected to the flexible circuit board (6) through SMT solder paste. 7. A mobile phone glass window protective screen fingerprint recognition assembly according to claim 1, characterized in that the scratch-resistant film (7) is made of a material with a Mohs hardness of 9H. 8. A mobile phone glass window protective screen fingerprint identification assembly according to claim 1, characterized in that the scratch-resistant film (7) is a film made of aluminum oxide or silicon carbide or a sapphire film. 9. A mobile phone glass window protective screen fingerprint identification assembly according to claim 1, characterized in that the thickness of the anti-scratch film (7) is 10 μm-20 μm. 10. prepare the method for a kind of mobile phone glass window protective screen fingerprint identification assembly as claimed in claim 1, it is characterized in that a kind of preparation method of mobile phone glass window protective screen fingerprint identification assembly is carried out by the following steps: 1. Connect the fingerprint touch sensor (3) on the surface of the printed circuit board (5); 2. Connect the fingerprint identification unit (2) to the fingerprint touch sensor (3) to obtain the fingerprint identification chip (1); 3. Install a metal ring (4) outside the fingerprint recognition chip (1); 4. Paste a layer of anti-scratch film (7) on the surface of the fingerprint identification chip (1); 5. The fingerprint identification chip (1) and the flexible circuit board (6) are electrically connected to obtain a mobile phone glass window protection screen fingerprint identification component.