WO2017067281A1

WO2017067281A1 - Calibration method and device for fingerprint sensor and terminal

Info

Publication number: WO2017067281A1
Application number: PCT/CN2016/093740
Authority: WO
Inventors: 张强; 王立中; 周海涛; 蒋奎; 贺威
Original assignee: 广东欧珀移动通信有限公司
Priority date: 2015-10-19
Filing date: 2016-08-05
Publication date: 2017-04-27
Also published as: CN105260721A

Abstract

Disclosed is a calibration method for a fingerprint sensor, comprising: when a calibration event is detected, calibrating a fingerprint sensor, storing calibration data of the fingerprint sensor produced by calibration; and, when a fingerprint sensor initialization event is detected and the calibration data of the fingerprint sensor is stored in a smart terminal, employing the stored calibration data of the fingerprint sensor to initialize the fingerprint sensor. In addition, also provided in the invention are a calibration device for the corresponding fingerprint sensor and a terminal.

Description

Calibration method, device and terminal for fingerprint sensor

The present application claims priority to Chinese Patent Application No. 2015106800151, entitled "A Method and Apparatus for Aligning a Fingerprint Sensor", filed on October 19, 2015, the entire contents of which is incorporated herein by reference. In the application.

Technical field

Embodiments of the present invention relate to the field of intelligent terminal technologies, and in particular, to a calibration method, device, and terminal for a fingerprint sensor.

Background technique

Fingerprint is the texture formed by uneven skin on the surface of the finger. The texture feature of the fingerprint is unique and stable, so it is often used as the basis for identification. A fingerprint sensor is a sensor that uses fingerprints to identify an identity.

More and more fingerprint sensors are applied to smart terminals. As a very important auxiliary device, the user experience can be improved. However, each time the fingerprint sensor is initialized, the fingerprint array of the fingerprint sensor needs to be calibrated. The calibration of the fingerprint sensor takes a long time, which greatly reduces the initialization speed of the fingerprint sensor and adversely affects the performance of the fingerprint sensor. .

technical problem

At present, each time the fingerprint sensor is initialized, the fingerprint dot matrix of the fingerprint sensor needs to be calibrated. The calibration of the fingerprint sensor takes a long time, which greatly reduces the initialization speed of the fingerprint sensor and adversely affects the performance of the fingerprint sensor.

Technical solution

The invention provides a calibration method, device and terminal for a fingerprint sensor to improve the initialization speed of the fingerprint sensor.

In a first aspect, an embodiment of the present invention provides a method for calibrating a fingerprint sensor, including:

When the preset fingerprint sensor calibration event is detected, the fingerprint sensor in the smart terminal is calibrated, and the calibration data of the fingerprint sensor obtained by the calibration is stored;

When the fingerprint sensor initialization event is detected, and the calibration data of the fingerprint sensor is stored in the smart terminal, the fingerprint sensor is initially set using the calibration data of the stored fingerprint sensor.

In a second aspect, an embodiment of the present invention provides a calibration device for a fingerprint sensor, including:

a sensor calibration unit for monitoring a fingerprint sensor in the smart terminal when monitoring a preset fingerprint sensor calibration event;

a calibration data storage unit, configured to store calibration data of the fingerprint sensor obtained by calibration;

The sensor initializing unit is configured to monitor the fingerprint sensor initialization event, and when the calibration data of the fingerprint sensor is stored in the smart terminal, the fingerprint sensor is initialized by using the stored calibration data of the fingerprint sensor.

In a third aspect, an embodiment of the present invention provides a terminal, where the terminal includes: a memory and a processor, where the memory and the processor are connected by using a bus;

The memory is configured to store a set of program codes;

The processor is configured to invoke program code stored in the memory to perform the following steps:

In a fourth aspect, an embodiment of the present invention provides a computer storage medium, where the program is stored in a computer storage medium, and the program is used to execute part or all of the method described in any one of the first aspects of the embodiments of the present invention. step.

Beneficial effect

DRAWINGS

1 is a schematic flow chart of a calibration method of a fingerprint sensor according to Embodiment 1 of the present invention;

2 is a schematic flow chart of a calibration method of a fingerprint sensor according to Embodiment 2 of the present invention;

3 is a schematic flow chart of a calibration method of a fingerprint sensor according to Embodiment 3 of the present invention;

4 is a schematic structural diagram of a calibration apparatus for a fingerprint sensor according to Embodiment 4 of the present invention;

FIG. 5 is a schematic structural diagram of a terminal according to Embodiment 5 of the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION

The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. It should also be noted that, for ease of description, only some, but not all, of the structures related to the present invention are shown in the drawings.

In conjunction with the first aspect, in a first possible implementation manner of the first aspect, the storing calibration data of the fingerprint sensor obtained by the calibration includes:

Obtain calibration data of the fingerprint sensor obtained by calibration, and store the calibration data obtained by the calibration into a preset calibration data storage unit.

With reference to the first possible implementation manner of the first aspect, in a second possible implementation manner of the first aspect, the calibration data storage unit is a non-erasable storage unit, and the smart terminal is detected to be powered on for the first time. The fingerprint sensor calibration event is generated.

In conjunction with the first possible implementation of the first aspect, in a third possible implementation of the first aspect, the calibration data storage unit is an erasable storage unit, and the calibration data storage unit is monitored The fingerprint sensor calibration event is generated when there is no calibration data.

In conjunction with the first aspect, or any one of the foregoing possible implementation manners of the first aspect, in the fourth possible implementation of the first aspect, the calibrating the fingerprint sensor includes:

The fingerprint sensor is calibrated using a preset fingerprint sensor calibration function.

In conjunction with the second aspect, in a first possible implementation manner of the second aspect, the calibration data storage unit is specifically configured to:

With reference to the first possible implementation manner of the second aspect, in a second possible implementation manner of the second aspect, the method further includes:

The first calibration event unit is configured to be the non-erasable storage unit in the calibration data storage unit, and generate the fingerprint sensor calibration event when the smart terminal is detected to be powered on for the first time.

With reference to the first possible implementation manner of the second aspect, in a third possible implementation manner of the second aspect, the method further includes:

And a second calibration event unit, wherein the calibration data storage unit is an erasable storage unit, and the fingerprint sensor calibration event is generated when no calibration data is detected in the calibration data storage unit.

With reference to the second aspect or any one of the foregoing possible implementation manners of the second aspect, in the fourth possible implementation manner of the second aspect, the sensor calibration unit is specifically configured to:

The memory is configured to store a set of program codes;

In conjunction with the third aspect, in a first possible implementation manner of the third aspect, the processor is configured to store the calibration data of the fingerprint sensor obtained by the calibration, including:

In conjunction with the first possible implementation of the third aspect, in a second possible implementation of the third aspect, the processor is configured to:

The calibration data storage unit is a non-erasable storage unit, and the fingerprint sensor calibration event is generated when the smart terminal is detected to be powered on for the first time.

In conjunction with the first possible implementation of the third aspect, in a third possible implementation of the third aspect, the processor is configured to:

The calibration data storage unit is an erasable storage unit, and the fingerprint sensor calibration event is generated when no calibration data is detected in the calibration data storage unit.

In conjunction with the third aspect, or any one of the foregoing possible implementation manners of the third aspect, in a fourth possible implementation manner of the third aspect, the processor is configured to perform calibration on the fingerprint sensor, including:

In a fourth aspect, an embodiment of the present invention provides a computer storage medium, where the program is stored in a computer storage medium, and the program includes the following steps when executed:

In conjunction with the fourth aspect, in a first possible implementation manner of the fourth aspect, the program execution includes the following steps in storing the calibration data of the fingerprint sensor obtained by the calibration:

In conjunction with the first possible implementation of the fourth aspect, in a second possible implementation manner of the fourth aspect, the executing the program includes the following steps:

In conjunction with the first possible implementation manner of the fourth aspect, in a third possible implementation manner of the fourth aspect, the executing the program includes the following steps:

With reference to the fourth aspect, or any one of the foregoing possible implementation manners of the fourth aspect, in a fourth possible implementation manner of the fourth aspect, the performing, when performing the calibration on the fingerprint sensor, includes:

Embodiment 1

FIG. 1 is a schematic flow chart of a calibration method of a fingerprint sensor according to Embodiment 1 of the present invention. The method can be performed by a calibration device of a fingerprint sensor, wherein the device can be implemented by software and/or hardware, can be built in the smart terminal as part of the smart terminal, and the smart terminal can be an electronic device such as a smart phone or a tablet computer. terminal. As shown in Figure 1, the implementation process includes:

Step 11: When the preset fingerprint sensor calibration event is detected, the fingerprint sensor in the smart terminal is calibrated, and the calibration data of the fingerprint sensor obtained by the calibration is stored.

The fingerprint sensor includes a fingerprint sensing chip and a protective cover fixed to the surface of the fingerprint sensing chip by an adhesive, and the protective cover is used to protect the fingerprint sensing chip. The fingerprint sensing chip has a plurality of sensing units (Pixels), and the plurality of sensing units are arranged in a matrix. The sensing unit is configured to sense the fingerprint signal and output the data, and the fingerprint signal is the depth information of the fingerprint texture. The surface of the protective cover serves as a sensing surface of the fingerprint sensor. When the finger presses the sensing surface, the matrix composed of the depth information of the fingerprint texture output by all the sensing units is the texture information of the finger.

In the actual environment, the difference in the different sensing units in the same fingerprint sensor, together with the unevenness of the adhesive and its impurities, the flatness of the protective cover, etc., may result in uneven response between the sensing units. Therefore, the accurate fingerprint texture feature cannot be directly obtained through the data output by the fingerprint sensor. The fingerprint sensor must be calibrated, and the fingerprint sensor is initialized by using the calibration data obtained by calibration to eliminate the unevenness.

In this embodiment, the fingerprint sensor may be a semiconductor capacitive sensor, an optical fingerprint sensor, a semiconductor thermal sensor, a semiconductor pressure sensor, an ultrasonic sensor, or a radio frequency (Radio) Frequency, RF) sensors, etc.

In this embodiment, the fingerprint sensor calibration event may be generated when the user triggers the calibration button of the preset fingerprint sensor. The smart terminal calibrates the fingerprint sensor and stores calibration data of the calibrated fingerprint sensor. For example, when the fingerprint sensor is a semiconductor capacitive sensor, the calibration data may be a capacitance parameter, such as a charge value of the capacitor.

Step 12: When the fingerprint sensor initialization event is detected, and the calibration data of the fingerprint sensor is stored in the smart terminal, the fingerprint sensor is initialized and set using the calibration data of the stored fingerprint sensor.

In this embodiment, when the fingerprint sensor initialization event is detected, it is determined whether the calibration data of the fingerprint sensor is stored in the smart terminal. If yes, the fingerprint sensor is initialized by using the calibration data of the stored fingerprint sensor, and the fingerprint sensor is no longer needed to be calibrated. Compared to the prior art, the fingerprint is required every time the fingerprint sensor is initialized. The sensor performs a calibration to improve the initialization speed of the fingerprint sensor.

The calibration method of the fingerprint sensor provided by the embodiment of the invention is configured to initialize the fingerprint sensor by using the calibration data of the stored fingerprint sensor when the fingerprint sensor initialization event is detected and the calibration data of the fingerprint sensor is stored in the smart terminal, thereby avoiding The fingerprint sensor is calibrated each time the fingerprint sensor is initialized, which improves the initialization speed of the fingerprint sensor.

Embodiment 2

The present embodiment provides a new calibration method for the fingerprint sensor based on the first embodiment. The calibration data of the fingerprint sensor obtained by the calibration may further include: obtaining the fingerprint obtained by the calibration. The calibration data of the sensor is stored and the calibration data obtained by the calibration is stored in a preset calibration data storage unit.

2 is a schematic flow chart of a calibration method of a fingerprint sensor according to Embodiment 2 of the present invention. As shown in FIG. 2, the implementation process may specifically include:

Step 21: When the preset fingerprint sensor calibration event is detected, the fingerprint sensor in the smart terminal is calibrated.

Step 22: Obtain calibration data of the fingerprint sensor obtained by calibration, and store the calibration data obtained by the calibration into a preset calibration data storage unit.

Exemplarily, the calibration data storage unit may be a non-erasable storage unit such as a storage unit in a non-volatile memory, or may be an erasable storage unit such as a memory.

When the calibration data storage unit is a non-erasable storage unit, the fingerprint sensor calibration event may be generated when the smart terminal is detected to be powered on for the first time. When the calibration data storage unit is an erasable storage unit, the fingerprint sensor calibration event may be generated when monitoring that there is no calibration data in the calibration data storage unit, that is, the calibration data storage unit is an erasable storage unit. In addition to generating a fingerprint sensor calibration event when the smart terminal is first turned on, a fingerprint sensor calibration event is also generated when the calibration data is erased.

Step 23: When the fingerprint sensor initialization event is detected, and the calibration data of the fingerprint sensor is stored in the smart terminal, the fingerprint sensor is initially set by using the stored calibration data of the fingerprint sensor.

In this embodiment, when the fingerprint sensor initialization event is detected, it is determined whether the calibration data of the fingerprint sensor is stored in the smart terminal, and if so, the fingerprint sensor is initialized by using the calibration data of the stored fingerprint sensor, and It is no longer necessary to re-calibrate the fingerprint sensor, which improves the initialization speed of the fingerprint sensor; if not, it generates a fingerprint sensor calibration event, calibrates the fingerprint sensor, and initializes the fingerprint sensor with the calibration data of the fingerprint sensor obtained by calibration That is, the fingerprint sensor does not need to be calibrated each time the fingerprint sensor is initialized.

The calibration method of the fingerprint sensor provided by the embodiment of the present invention, when monitoring a preset fingerprint sensor calibration event, calibrating the fingerprint sensor to obtain calibration data of the fingerprint sensor, and the calibration data of the fingerprint sensor can be stored in the erasable storage unit. It can also be stored in a non-erasable memory unit. When the fingerprint sensor initialization event is detected and the calibration data of the fingerprint sensor is stored in the smart terminal, the fingerprint sensor is initialized by using the stored calibration data of the fingerprint sensor, thereby improving the initialization speed of the fingerprint sensor.

Embodiment 3

This embodiment provides a new method for calibrating a fingerprint sensor based on the foregoing embodiment. In this embodiment, the fingerprint sensor is calibrated, and the method further includes: performing the fingerprint sensor by using a preset fingerprint sensor calibration function. calibration.

3 is a schematic flow chart of a calibration method of a fingerprint sensor according to Embodiment 3 of the present invention. As shown in FIG. 3, the implementation process may specifically include:

Step 31: When the preset fingerprint sensor calibration event is detected, the fingerprint sensor is calibrated by using a preset fingerprint sensor calibration function.

In this embodiment, the fingerprint sensor calibration function includes, but is not limited to, calculation by a neural network, data statistics, curve fitting, mathematical model, etc., for example, the calibration function may be a linear function.

It should be noted that the calibration function is only related to the hardware structure of the fingerprint sensor, and is independent of the user behavior. When the fingerprint sensor is calibrated by using the calibration function, the user's finger is not required to contact the sensing surface of the plurality of sensing units for finger contact. .

Step 32: Store calibration data of the fingerprint sensor obtained by calibration.

In this embodiment, the calibration data of the fingerprint sensor may be stored in an erasable storage unit or a non-erasable storage unit of the smart terminal.

Step 33: When the fingerprint sensor initialization event is detected, and the calibration data of the fingerprint sensor is stored in the smart terminal, the fingerprint sensor is initially set by using the stored calibration data of the fingerprint sensor.

The calibration method of the fingerprint sensor provided by the embodiment of the present invention, when the preset fingerprint sensor calibration event is detected, the fingerprint sensor is calibrated by using a preset fingerprint sensor calibration function to obtain calibration data of the fingerprint sensor, and then the fingerprint is monitored. In the sensor initialization event, the fingerprint sensor can be initialized by using the previously stored calibration data, except that the previously stored calibration data is deleted, without having to recalibrate the fingerprint sensor during initialization, thereby improving the initialization speed of the fingerprint sensor.

Fourth embodiment

4 is a schematic structural diagram of a calibration apparatus for a fingerprint sensor according to Embodiment 4 of the present invention. The device may be built in the smart terminal, wherein the smart terminal may be an electronic terminal such as a smart phone or a tablet. As shown in FIG. 4, the specific structure of the calibration device of the fingerprint sensor can be as follows:

The sensor calibration unit 41 is configured to monitor the fingerprint sensor in the smart terminal when the preset fingerprint sensor calibration event is detected;

a calibration data storage unit 42 for storing calibration data of the fingerprint sensor obtained by calibration;

The sensor initializing unit 43 is configured to monitor the fingerprint sensor initialization event, and when the calibration data of the fingerprint sensor is stored in the smart terminal, initialize the setting of the fingerprint sensor by using the stored calibration data of the fingerprint sensor.

In this embodiment, the calibration data storage unit 42 may be specifically configured to:

In this embodiment, the calibration device of the fingerprint sensor may further include:

In the calibration device of any of the fingerprint sensors provided above, the sensor calibration unit 41 may specifically be used to:

Fifth embodiment

Referring to FIG. 5, FIG. 5 is a schematic structural diagram of a terminal according to Embodiment 5 of the present invention. The terminal described in this embodiment includes: at least one input device 100; at least one output device 200; at least one processor 300 and a memory 400. The processor 300 can be a central processing unit (CPU, Central) Processing Unit). The input device 100, the output device 200, the processor 300, and the memory 400 described above are connected by a bus 500.

The input device 100 may specifically be a touch panel, a physical button, or the like.

The output device 200 described above may specifically be a display screen.

The above memory 400 may be a high speed RAM memory or a non-volatile memory (non-volatile memory). Memory), such as disk storage.

The memory 400 is used to store a set of program codes, and the processor 300 is used to call the program code stored in the memory 400 to perform the following operations:

In some possible implementations, the processor 300 is configured to store calibration data of the fingerprint sensor obtained by the calibration, including:

In some possible implementations, the processor 300 is configured to:

In some possible implementations, the processor 300 is configured to calibrate the fingerprint sensor, including:

In a specific implementation, the processor 300 described in the embodiment of the present invention may implement the implementation manner described in the calibration method of the fingerprint sensor provided by the first to third embodiments of the present invention, and may also perform the present invention. The implementation described in the calibration apparatus of the fingerprint sensor provided by the fourth embodiment is not described herein again.

In the above embodiments, the descriptions of the various embodiments are different, and the details that are not detailed in a certain embodiment can be referred to the related descriptions of other embodiments.

The embodiment of the present invention further provides a computer storage medium, wherein the computer storage medium can store a program, and the program includes some or all of the steps of the calibration method of any one of the fingerprint sensors described in the foregoing method embodiments.

It should be noted that, in the calibration method of the fingerprint sensor of the present invention, a common tester in the art can understand all or part of the process of implementing the foregoing embodiment of the embodiment of the present invention, and the related hardware can be controlled by a computer program. Upon completion, the computer program can be stored in a computer readable storage medium, such as in a memory of the terminal, and executed by at least one processor within the terminal, and can include, as described, the fingerprint sensor The flow of an embodiment of the calibration method. Wherein, the storage medium may be a magnetic disk, an optical disk, a read only memory (ROM, Read) Only Memory), random access memory (RAM, Random Access Memory), etc.

For the calibration device of the fingerprint sensor according to the embodiment of the present invention, each functional unit may be integrated into one processing chip, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of a software functional unit. The integrated unit, if implemented in the form of a software functional unit and sold or used as a standalone product, may also be stored in a computer readable storage medium, such as a read only memory, a magnetic disk or an optical disk, etc. .

The calibration method of the fingerprint sensor provided in this embodiment is the same as the calibration method of the fingerprint sensor provided by any embodiment of the present invention, and the calibration method of the fingerprint sensor provided by any embodiment of the present invention may be performed, and the method for performing the corresponding method is provided. Functional modules and benefits. Reference may be made to the calibration method of the fingerprint sensor provided by any embodiment of the present invention, which is not described in detail in this embodiment.

The above is only a preferred embodiment of the present invention, and is not intended to limit the embodiments of the present invention. Various modifications and changes can be made to the embodiments of the present invention. Any modifications, equivalents, improvements, etc. made within the spirit and scope of the embodiments of the present invention are intended to be included within the scope of the present invention.

Claims

A method of calibrating a fingerprint sensor, comprising:

When the preset fingerprint sensor calibration event is detected, the fingerprint sensor in the smart terminal is calibrated, and the calibration data of the fingerprint sensor obtained by the calibration is stored;

When the fingerprint sensor initialization event is detected, and the calibration data of the fingerprint sensor is stored in the smart terminal, the fingerprint sensor is initially set using the calibration data of the stored fingerprint sensor.
The method of claim 1 wherein said storing calibration data obtained from said fingerprint sensor comprises:

Obtain calibration data of the fingerprint sensor obtained by calibration, and store the calibration data obtained by the calibration into a preset calibration data storage unit.
The method of claim 2, wherein

The calibration data storage unit is a non-erasable storage unit, and the fingerprint sensor calibration event is generated when the smart terminal is detected to be powered on for the first time.
The method of claim 2, wherein

The calibration data storage unit is an erasable storage unit, and the fingerprint sensor calibration event is generated when no calibration data is detected in the calibration data storage unit.
The method of any of claims 1-4, wherein the calibrating the fingerprint sensor comprises:

The fingerprint sensor is calibrated using a preset fingerprint sensor calibration function.
A calibration device for a fingerprint sensor, comprising:

a sensor calibration unit for monitoring a fingerprint sensor in the smart terminal when monitoring a preset fingerprint sensor calibration event;

a calibration data storage unit, configured to store calibration data of the fingerprint sensor obtained by calibration;

The sensor initializing unit is configured to monitor the fingerprint sensor initialization event, and when the calibration data of the fingerprint sensor is stored in the smart terminal, the fingerprint sensor is initialized by using the stored calibration data of the fingerprint sensor.
The apparatus according to claim 6, wherein said calibration data storage unit is specifically configured to:

Obtain calibration data of the fingerprint sensor obtained by calibration, and store the calibration data obtained by the calibration into a preset calibration data storage unit.
The apparatus of claim 7 further comprising:

The first calibration event unit is configured to be the non-erasable storage unit in the calibration data storage unit, and generate the fingerprint sensor calibration event when the smart terminal is detected to be powered on for the first time.
The apparatus of claim 7 further comprising:

And a second calibration event unit, wherein the calibration data storage unit is an erasable storage unit, and the fingerprint sensor calibration event is generated when no calibration data is detected in the calibration data storage unit.
A device according to any one of claims 6-9, wherein the sensor calibration unit is specifically for:

The fingerprint sensor is calibrated using a preset fingerprint sensor calibration function.
A terminal, wherein the terminal comprises: a memory and a processor, the memory and the processor being connected by a bus;

The memory is configured to store a set of program codes;

The processor is configured to invoke program code stored in the memory to perform the following steps:

When the preset fingerprint sensor calibration event is detected, the fingerprint sensor in the smart terminal is calibrated, and the calibration data of the fingerprint sensor obtained by the calibration is stored;

When the fingerprint sensor initialization event is detected, and the calibration data of the fingerprint sensor is stored in the smart terminal, the fingerprint sensor is initially set using the calibration data of the stored fingerprint sensor.
The terminal according to claim 11, wherein the processor is configured to store calibration data of the fingerprint sensor obtained by the calibration, comprising:

Obtain calibration data of the fingerprint sensor obtained by calibration, and store the calibration data obtained by the calibration into a preset calibration data storage unit.
The terminal of claim 12 wherein said processor is for:

The calibration data storage unit is a non-erasable storage unit, and the fingerprint sensor calibration event is generated when the smart terminal is detected to be powered on for the first time.
The terminal of claim 12 wherein said processor is for:

The calibration data storage unit is an erasable storage unit, and the fingerprint sensor calibration event is generated when no calibration data is detected in the calibration data storage unit.
The terminal according to any one of claims 11 to 14, wherein the processor is configured to calibrate a fingerprint sensor, including:

The fingerprint sensor is calibrated using a preset fingerprint sensor calibration function.
A computer storage medium, wherein the computer storage medium stores a program, and the program includes the following steps when executed:

When the preset fingerprint sensor calibration event is detected, the fingerprint sensor in the smart terminal is calibrated, and the calibration data of the fingerprint sensor obtained by the calibration is stored;

When the fingerprint sensor initialization event is detected, and the calibration data of the fingerprint sensor is stored in the smart terminal, the fingerprint sensor is initially set using the calibration data of the stored fingerprint sensor.
The computer storage medium according to claim 16, wherein said program execution includes the following steps in storing calibration data of said fingerprint sensor obtained by calibration:

Obtain calibration data of the fingerprint sensor obtained by calibration, and store the calibration data obtained by the calibration into a preset calibration data storage unit.
The computer storage medium of claim 17 wherein said program execution comprises the steps of:

The calibration data storage unit is a non-erasable storage unit, and the fingerprint sensor calibration event is generated when the smart terminal is detected to be powered on for the first time.
The computer storage medium of claim 17 wherein said program execution comprises the steps of:

The calibration data storage unit is an erasable storage unit, and the fingerprint sensor calibration event is generated when no calibration data is detected in the calibration data storage unit.
A computer storage medium according to any one of claims 16 to 19, wherein in calibrating the fingerprint sensor, the program execution comprises the steps of:

The fingerprint sensor is calibrated using a preset fingerprint sensor calibration function.