CN106446818B - Fingerprint identification method and device and terminal equipment - Google Patents

Abstract

The invention discloses a fingerprint identification method, a fingerprint identification device and terminal equipment, wherein the method comprises the following steps: detecting a first capacitance value generated by a target object in contact with the fingerprint sensor; judging whether the magnitude of the first capacitance value is consistent with the magnitude of a preset second capacitance value, wherein the second capacitance value is a capacitance value generated by a registered fingerprint contacted with the fingerprint sensor; if the magnitude of the first capacitance value is consistent with the magnitude of the second capacitance value, detecting whether the target object is matched with the registered fingerprint; and if the matching degree of the target object and the registered fingerprint meets a preset threshold value, executing corresponding operation according to a preset control instruction. By the embodiment of the invention, the probability of false touch on the fingerprint sensor can be greatly reduced, and the accuracy and the effectiveness of fingerprint identification are improved.

Description

Fingerprint identification method, device and terminal equipment

technical field

The present invention relates to the technical field of fingerprint identification, and in particular, to a fingerprint identification method, device and terminal equipment.

Background technique

At present, with the continuous popularity of fingerprint recognition, fingerprint recognition can not only be used for functions such as unlocking and waking up mobile terminals, but also an important part of mobile payment. As a result, more and more attention is paid to the accuracy of fingerprint recognition.

In the related art, active unlocking is used, that is, the fingerprint sensor continuously transmits signals to the outside world, and is ready to unlock all "fingerprints" entering the sensing area at any time. This unlocking process will occur as long as the user touches any skin. Very high probability of false touch.

SUMMARY OF THE INVENTION

The purpose of the present invention is to solve one of the above-mentioned technical problems at least to a certain extent.

Therefore, the first object of the present invention is to propose a fingerprint identification method, which can greatly reduce the probability of false touches on the fingerprint sensor and improve the accuracy and effectiveness of fingerprint identification.

The second object of the present invention is to provide a fingerprint identification device.

The third object of the present invention is to provide a terminal device.

In order to achieve the above purpose, a fingerprint identification method proposed according to an embodiment of the first aspect of the present invention includes the following steps:

detecting the first capacitance value generated by the target object in contact with the fingerprint sensor;

determining whether the magnitude of the first capacitance value is consistent with the magnitude of a preset second capacitance value, wherein the second capacitance value is a capacitance value generated by a registered fingerprint in contact with the fingerprint sensor;

If the magnitude of the first capacitance value is consistent with the magnitude of the second capacitance value, detecting whether the target object matches the registered fingerprint;

If the matching degree between the target object and the registered fingerprint satisfies a preset threshold, a corresponding operation is performed according to a preset control instruction.

The fingerprint identification method of the embodiment of the present invention firstly detects the first capacitance value generated by the target object in contact with the fingerprint sensor, and then determines whether the magnitude of the first capacitance value is consistent with the magnitude of the preset second capacitance value, wherein the second The capacitance value is the capacitance value generated by the registered fingerprint in contact with the fingerprint sensor, and then when the order of magnitude of the first capacitance value is consistent with the order of magnitude of the second capacitance value, it is detected whether the target object matches the registered fingerprint, and finally the target object matches the registered fingerprint. When the degree of control meets the preset threshold, the corresponding operation is performed according to the preset control instruction. In this way, the probability of mistakenly touching the fingerprint sensor can be greatly reduced, and the accuracy and effectiveness of fingerprint identification can be improved.

In order to achieve the above purpose, a fingerprint identification device according to the embodiment of the second aspect of the present invention includes:

a first detection module for detecting a first capacitance value generated by a target object in contact with the fingerprint sensor;

a judgment module, configured to judge whether the magnitude of the first capacitance value is consistent with the magnitude of a preset second capacitance value, wherein the second capacitance value is a capacitance value generated by a registered fingerprint in contact with the fingerprint sensor;

a first processing module, configured to detect whether the target object matches the registered fingerprint when the magnitude of the first capacitance value is consistent with the magnitude of the second capacitance value;

The second processing module is configured to perform a corresponding operation according to a preset control instruction when the matching degree between the target object and the registered fingerprint meets a preset threshold.

The fingerprint identification device of the embodiment of the present invention firstly detects the first capacitance value generated by the target object in contact with the fingerprint sensor, and then determines whether the magnitude of the first capacitance value is consistent with the magnitude of the preset second capacitance value, wherein the second The capacitance value is the capacitance value generated by the registered fingerprint in contact with the fingerprint sensor, and then when the order of magnitude of the first capacitance value is consistent with the order of magnitude of the second capacitance value, it is detected whether the target object matches the registered fingerprint, and finally the target object matches the registered fingerprint. When the degree of control meets the preset threshold, the corresponding operation is performed according to the preset control instruction. In this way, the probability of mistakenly touching the fingerprint sensor can be greatly reduced, and the accuracy and effectiveness of fingerprint identification can be improved.

In order to achieve the above purpose, a terminal device according to an embodiment of the third aspect of the present invention includes: a casing, a processor, a memory, a circuit board and a power supply circuit, wherein the circuit board is arranged around the casing Inside the formed space, the processor and the memory are arranged on the circuit board; the power circuit is used to supply power to each circuit or device of the terminal device; the memory is used to store executable program codes; The processor runs a program corresponding to the executable program code by reading the executable program code stored in the memory, so as to perform the following steps:

detecting the first capacitance value generated by the target object in contact with the fingerprint sensor;

determining whether the magnitude of the first capacitance value is consistent with the magnitude of a preset second capacitance value, wherein the second capacitance value is a capacitance value generated by a registered fingerprint in contact with the fingerprint sensor;

If the magnitude of the first capacitance value is consistent with the magnitude of the second capacitance value, detecting whether the target object matches the registered fingerprint;

If the matching degree between the target object and the registered fingerprint satisfies a preset threshold, a corresponding operation is performed according to a preset control instruction.

The terminal device according to the embodiment of the present invention firstly detects the first capacitance value generated by the target object in contact with the fingerprint sensor, and then determines whether the magnitude of the first capacitance value is consistent with the magnitude of the preset second capacitance value, wherein the second capacitance The value is the capacitance value generated by the registered fingerprint in contact with the fingerprint sensor, and then when the order of magnitude of the first capacitance value is consistent with the order of magnitude of the second capacitance value, it is detected whether the target object matches the registered fingerprint, and finally the target object matches the registered fingerprint. When the preset threshold is met, the corresponding operation is performed according to the preset control instruction. In this way, the probability of mistakenly touching the fingerprint sensor can be greatly reduced, and the accuracy and effectiveness of fingerprint identification can be improved.

Additional aspects and advantages of the present invention will be set forth, in part, from the following description, and in part will be apparent from the following description, or may be learned by practice of the invention.

Description of drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of embodiments taken in conjunction with the accompanying drawings, wherein:

1 is a flowchart of a fingerprint identification method according to an embodiment of the present invention;

2 is a schematic diagram of a capacitive fingerprint sensor model according to an embodiment of the present invention;

3 is a flowchart of a fingerprint identification method according to another embodiment of the present invention;

4 is a schematic structural diagram of a fingerprint identification device according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a fingerprint identification device according to another embodiment of the present invention; and

FIG. 6 is a schematic structural diagram of a terminal device according to an embodiment of the present invention.

Detailed ways

The following describes in detail the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

The following describes the fingerprint identification method, device, and terminal device according to the embodiments of the present invention with reference to the accompanying drawings.

FIG. 1 is a flowchart of a fingerprint identification method according to an embodiment of the present invention.

As shown in FIG. 1 , the fingerprint identification method according to the embodiment of the present invention includes the following steps:

Step 101: Detect a first capacitance value generated by a target object in contact with the fingerprint sensor.

Step 102: Determine whether the magnitude of the first capacitance value is consistent with the magnitude of the preset second capacitance value, where the second capacitance value is a capacitance value generated by a registered fingerprint in contact with the fingerprint sensor.

Usually, the terminal device is equipped with active fingerprint unlocking, payment and other operations, that is, the fingerprint sensor continuously transmits signals to the outside world, and is ready to operate all "fingerprints" entering the sensing area at any time. However, as long as the user touches any skin, it will Operation processing occurs, and there is a very high probability of false touch.

Therefore, the embodiments of the present invention provide a fingerprint identification method. Before matching with a registered fingerprint, after judging that the target object is a finger fingerprint according to the capacitance value of the fingerprint sensor, the target object is further matched with the registered fingerprint, which can greatly reduce the The probability of false touch of the fingerprint sensor improves the accuracy and effectiveness of fingerprint recognition.

Specifically, the fingerprint sensor of the embodiment of the present invention is a capacitive fingerprint sensor. Based on the physical principle that the capacitance value is inversely proportional to the distance between the capacitive electrodes, the space on the surface of the object can be measured by measuring the coupling capacitance between the surface of the object and the electrode array on the surface of the sensor. Structural imaging, such as imaging the uneven spatial features of the ridges and valleys of fingerprints. In addition, different fingerprints can be distinguished by the different capacitances formed between the ridges and valleys of the fingerprint and the semiconductor capacitive particles. The specific structure is described in detail with reference to FIG. 2 .

2 is a schematic diagram of a capacitive fingerprint sensor model according to one embodiment of the present invention. As shown in Figure 2, when the fingerprint touches the sensing area of the semiconductor sensor, the ridges and valleys of different fingerprints form different capacitances to distinguish different fingerprints.

Usually, the ridges and valleys of the fingerprint skin near the fingertip are denser than other places, and the lines near the fingertip are all closed loops. The semiconductor sensor emits a radio frequency signal, and the signal is reflected by the texture of the fingerprint, and different capacitances appear on the same contour surface. Therefore, the texture near the fingertip is a closed loop and the capacitance value formed by the semiconductor sensor will be the largest, while the capacitance value formed by the skin and the semiconductor sensor in other places will be much smaller, not on an order of magnitude.

First, the fingerprint information of the corresponding finger needs to be entered in advance, that is, the fingerprint is registered and stored, so that it can be matched with the identification result of the fingerprint sensor in the subsequent contact. During the entry process, a finger touching the fingerprint sensor will generate a certain capacitance value, and the capacitance value is stored as a preset second capacitance value corresponding to the registered fingerprint.

Further, after the target object is in contact with the fingerprint sensor, a first capacitance value can be generated, and then the magnitude of the first capacitance value is obtained and compared with the predetermined magnitude of the second capacitance value to determine whether the magnitudes of the two are consistent, thereby Determine if the target object is a finger.

Step 103, if the magnitude of the first capacitance value is consistent with the magnitude of the second capacitance value, detect whether the target object matches the registered fingerprint.

Step 104, if the matching degree between the target object and the registered fingerprint satisfies the preset threshold, perform corresponding operations according to the preset control instruction.

Specifically, when the magnitude of the first capacitance value is consistent with the magnitude of the second capacitance value, it indicates that the target object in contact with the fingerprint sensor is a fingerprint, and then it is detected whether the target object matches the registered fingerprint.

Among them, the order of magnitude refers to a series of powers of 10, that is, the ratio between two adjacent orders of magnitude is 10. For example, to say that two numbers differ by three orders of magnitude is actually saying that one number is 1000 times larger than the other.

For example, if the first capacitance value is 1000 mF and the second capacitance value is 1400 mF, it is determined that the magnitude of the first capacitance value is consistent with the magnitude of the second capacitance value. If the first capacitance value is 1000 mF and the second capacitance value is 14000 mF, it is determined that the magnitude of the first capacitance value is inconsistent with the magnitude of the second capacitance value.

Wherein, when the target object contacts the fingerprint sensor, the collected image is recognized, and the recognition result is matched with the registered fingerprint. Further, when the matching degree between the target object and the registered fingerprint satisfies the preset threshold, the corresponding operation is performed according to the preset control instruction.

Among them, the user can preset different control instructions according to actual needs. An example is as follows:

The preset threshold is 90%.

Example 1: The control command is an unlock command.

Specifically, when the matching degree between the target object and the registered fingerprint is 95%, which meets the preset threshold, the screen of the terminal device is unlocked.

Example 2: The control instruction is a payment instruction.

Specifically, when the matching degree between the target object and the registered fingerprint is 90%, which meets the preset threshold, the payment operation is performed on the order.

The fingerprint identification method of the embodiment of the present invention firstly detects the first capacitance value generated by the target object in contact with the fingerprint sensor, and then determines whether the magnitude of the first capacitance value is consistent with the magnitude of the preset second capacitance value, wherein the second The capacitance value is the capacitance value generated by the registered fingerprint in contact with the fingerprint sensor, and then when the order of magnitude of the first capacitance value is consistent with the order of magnitude of the second capacitance value, it is detected whether the target object matches the registered fingerprint, and finally the target object matches the registered fingerprint. When the degree of control meets the preset threshold, the corresponding operation is performed according to the preset control instruction. In this way, the probability of mistakenly touching the fingerprint sensor can be greatly reduced, and the accuracy and effectiveness of fingerprint identification can be improved.

FIG. 3 is a flowchart of a fingerprint identification method according to another embodiment of the present invention.

As shown in FIG. 3 , the fingerprint identification method according to the embodiment of the present invention includes the following steps:

Step 201: Obtain the registered fingerprint entered by the user.

Step 202, detecting and storing the second capacitance value generated by the registered fingerprint touching the fingerprint sensor.

Specifically, the second capacitance value generated by the registered fingerprint touching the fingerprint sensor needs to be stored in advance. Wherein, the specific process of obtaining the second capacitance value may include:

First, according to their own needs and personal operating habits, the user can enter the fingerprint information of the corresponding finger before using the mobile terminal or application for the first time, so that the subsequent contact can be matched with the identification result of the fingerprint sensor.

Further, when the fingerprint information of the corresponding finger is entered, a certain capacitance value will be generated when the registered fingerprint contacts the fingerprint sensor, which is recorded as the second capacitance value and stored.

Step 203, detecting the first capacitance value generated by the target object in contact with the fingerprint sensor.

Step 204: Determine whether the magnitude of the first capacitance value is consistent with the magnitude of the preset second capacitance value, where the second capacitance value is a capacitance value generated by a registered fingerprint in contact with the fingerprint sensor.

Step 205 , if the magnitude of the first capacitance value is inconsistent with the magnitude of the second capacitance value, a response of identifying failure is fed back.

Step 206, if the magnitude of the first capacitance value is consistent with the magnitude of the second capacitance value, detect whether the target object matches the registered fingerprint.

Specifically, a certain capacitance value is also generated when the target object is in contact with the fingerprint sensor, which is recorded as the first capacitance value, and its magnitude is compared with the magnitude of the previously stored second capacitance value to determine whether it is consistent.

When the order of magnitude of the first capacitance value is consistent with the order of magnitude of the second capacitance value, it indicates that the target object in contact with the fingerprint sensor is a fingerprint, and then it is detected whether the target object matches the registered fingerprint.

When the magnitude of the first capacitance value is inconsistent with the magnitude of the second capacitance value, it indicates that the target object is not a fingerprint, and a recognition failure response is fed back.

It should be noted that, for the explanation and description of the order of magnitude, reference is made to the description in the above steps S101-S103, and details are not repeated here.

Step 207: If the matching degree between the target object and the registered fingerprint does not meet the preset threshold, a recognition failure response is fed back.

Step 208: If the matching degree between the target object and the registered fingerprint satisfies the preset threshold, perform corresponding operations according to the preset control instruction.

Specifically, when the magnitude of the first capacitance value is consistent with the magnitude of the second capacitance value, it indicates that the target object in contact with the fingerprint sensor is a fingerprint, and then it is detected whether the target object matches the registered fingerprint.

Further, when the matching degree between the target object and the registered fingerprint satisfies the preset threshold, the corresponding operation is performed according to the preset control instruction.

The user can preset different control instructions according to actual needs. For a specific example, refer to step 104, which will not be repeated here.

It should be noted that, if the matching degree between the target object and the registered fingerprint does not meet the preset threshold, a recognition failure response will be fed back.

Continuing to take the above example as an example, when the matching degree between the target object and the registered fingerprint is 85%, and the preset threshold is not met, the recognition failure response is fed back.

The fingerprint identification method of the embodiment of the present invention firstly detects the first capacitance value generated by the target object in contact with the fingerprint sensor, and then determines whether the magnitude of the first capacitance value is consistent with the magnitude of the preset second capacitance value, wherein the second The capacitance value is the capacitance value generated by the registered fingerprint in contact with the fingerprint sensor, and then when the order of magnitude of the first capacitance value is consistent with the order of magnitude of the second capacitance value, it is detected whether the target object matches the registered fingerprint, and finally the target object matches the registered fingerprint. When the degree of control meets the preset threshold, the corresponding operation is performed according to the preset control instruction. In this way, the probability of mistakenly touching the fingerprint sensor can be greatly reduced, and the accuracy and effectiveness of fingerprint identification can be improved.

In order to realize the above embodiments, the present invention also provides a fingerprint identification device.

FIG. 4 is a schematic structural diagram of a fingerprint identification device according to an embodiment of the present invention.

As shown in FIG. 4 , the fingerprint identification includes: a first detection module 10 , a judgment module 20 , a first processing module 30 and a second processing module 40 .

The first detection module 10 is used for detecting the first capacitance value generated by the target object in contact with the fingerprint sensor.

The judgment module 20 is used for judging whether the magnitude of the first capacitance value is consistent with the magnitude of the preset second capacitance value, wherein the second capacitance value is a capacitance value generated by a registered fingerprint in contact with the fingerprint sensor.

The first processing module 30 is configured to detect whether the target object matches the registered fingerprint when the magnitude of the first capacitance value is consistent with the magnitude of the second capacitance value.

The second processing module 40 is configured to perform a corresponding operation according to a preset control instruction when the matching degree between the target object and the registered fingerprint meets a preset threshold.

First, the fingerprint information of the corresponding finger needs to be entered in advance, that is, the fingerprint is registered and stored, so that it can be matched with the identification result of the fingerprint sensor in the subsequent contact. During the entry process, a finger touching the fingerprint sensor will generate a certain capacitance value, and the capacitance value is stored as a preset second capacitance value corresponding to the registered fingerprint.

Further, after the target object is in contact with the fingerprint sensor, a first capacitance value can be generated, and then the magnitude of the first capacitance value is obtained and compared with the predetermined magnitude of the second capacitance value to determine whether the magnitudes of the two are consistent, thereby Determine if the target object is a finger.

Specifically, when the magnitude of the first capacitance value is consistent with the magnitude of the second capacitance value, it indicates that the target object in contact with the fingerprint sensor is a fingerprint, and then it is detected whether the target object matches the registered fingerprint.

Wherein, when the target object contacts the fingerprint sensor, the collected image is recognized, and the recognition result is matched with the registered fingerprint. Further, when the matching degree between the target object and the registered fingerprint satisfies the preset threshold, the corresponding operation is performed according to the preset control instruction.

It should be noted that the foregoing explanations on the fingerprint identification method embodiment are also applicable to the fingerprint identification device of this embodiment, and the implementation principle thereof is similar, which is not repeated here.

The fingerprint identification device of the embodiment of the present invention firstly detects the first capacitance value generated by the target object in contact with the fingerprint sensor, and then determines whether the magnitude of the first capacitance value is consistent with the magnitude of the preset second capacitance value, wherein the second The capacitance value is the capacitance value generated by the registered fingerprint in contact with the fingerprint sensor, and then when the order of magnitude of the first capacitance value is consistent with the order of magnitude of the second capacitance value, it is detected whether the target object matches the registered fingerprint, and finally the target object matches the registered fingerprint. When the degree of control meets the preset threshold, the corresponding operation is performed according to the preset control instruction. In this way, the probability of mistakenly touching the fingerprint sensor can be greatly reduced, and the accuracy and effectiveness of fingerprint identification can be improved.

FIG. 5 is a schematic structural diagram of a fingerprint identification device according to another embodiment of the present invention.

As shown in FIG. 5 , on the basis of that shown in FIG. 4 , the fingerprint identification device further includes: an acquisition module 50 and a second detection module 60 .

Wherein, the obtaining module 50 is used to obtain the registered fingerprints entered by the user.

The second detection module 60 is configured to detect and store the second capacitance value generated by the registered fingerprint touching the fingerprint sensor.

Specifically, the second capacitance value generated by the registered fingerprint touching the fingerprint sensor needs to be stored in advance. Wherein, the specific process of obtaining the second capacitance value may include:

First, according to their own needs and personal operating habits, the user can enter the fingerprint information of the corresponding finger before using the mobile terminal or application for the first time, so that the subsequent contact can be matched with the identification result of the fingerprint sensor.

Further, when the fingerprint information of the corresponding finger is entered, a certain capacitance value will be generated when the registered fingerprint contacts the fingerprint sensor, which is recorded as the second capacitance value and stored.

It should be noted that the foregoing explanations on the fingerprint identification method embodiment are also applicable to the fingerprint identification device of this embodiment, and the implementation principle thereof is similar, which is not repeated here.

The fingerprint identification device of the embodiment of the present invention firstly detects the first capacitance value generated by the target object in contact with the fingerprint sensor, and then determines whether the magnitude of the first capacitance value is consistent with the magnitude of the preset second capacitance value, wherein the second The capacitance value is the capacitance value generated by the registered fingerprint in contact with the fingerprint sensor, and then when the order of magnitude of the first capacitance value is consistent with the order of magnitude of the second capacitance value, it is detected whether the target object matches the registered fingerprint, and finally the target object matches the registered fingerprint. When the degree of control meets the preset threshold, the corresponding operation is performed according to the preset control instruction. In this way, the probability of mistakenly touching the fingerprint sensor can be greatly reduced, and the accuracy and effectiveness of fingerprint identification can be improved.

FIG. 6 is a schematic structural diagram of a terminal device according to an embodiment of the present invention.

6, the terminal device 1000 may include one or more of the following components: a processor 1001, a memory 1002, a power circuit 1003, a multimedia component 1004, an audio component 1005, an input/output (I/O) interface 1006, and a sensor component 1007 , and the communication component 1008.

The power supply circuit 1003 is used to supply power to each circuit or device of the terminal device; the memory 1002 is used to store the executable program code; the processor 1001 runs the corresponding executable program code by reading the executable program code stored in the memory 1002 program to perform the following steps:

A first capacitance value generated by a target object in contact with the fingerprint sensor is detected.

It is determined whether the magnitude of the first capacitance value is consistent with the magnitude of the preset second capacitance value, wherein the second capacitance value is a capacitance value generated by a registered fingerprint in contact with the fingerprint sensor.

If the magnitude of the first capacitance value is consistent with the magnitude of the second capacitance value, it is detected whether the target object matches the registered fingerprint.

If the matching degree between the target object and the registered fingerprint satisfies the preset threshold, the corresponding operation is performed according to the preset control instruction.

It should be noted that the foregoing explanation of the fingerprint identification method embodiment is also applicable to the terminal device of this embodiment, and the implementation principle thereof is similar, and details are not repeated here.

The terminal device according to the embodiment of the present invention firstly detects the first capacitance value generated by the target object in contact with the fingerprint sensor, and then determines whether the magnitude of the first capacitance value is consistent with the magnitude of the preset second capacitance value, wherein the second capacitance The value is the capacitance value generated by the registered fingerprint in contact with the fingerprint sensor, and then when the magnitude of the first capacitance value is consistent with the order of magnitude of the second capacitance value, it is detected whether the target object matches the registered fingerprint, and finally the target object matches the registered fingerprint. When the preset threshold is met, the corresponding operation is performed according to the preset control instruction. In this way, the probability of mistakenly touching the fingerprint sensor can be greatly reduced, and the accuracy and effectiveness of fingerprint identification can be improved.

In the description of the present invention, it should be understood that the terms "first" and "second" are only used for description purposes, and cannot be interpreted as indicating or implying relative importance or the number of indicated technical features. Thus, a feature delimited with "first", "second" may expressly or implicitly include at least one of that feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise expressly and specifically defined.

In the description of this specification, description with reference to the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples", etc., mean specific features described in connection with the embodiment or example , structure, material or feature is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, those skilled in the art may combine and combine the different embodiments or examples described in this specification, as well as the features of the different embodiments or examples, without conflicting each other.

Although the embodiments of the present invention have been shown and described above, it should be understood that the above-mentioned embodiments are exemplary and should not be construed as limiting the present invention. Embodiments are subject to variations, modifications, substitutions and variations.

Claims (11)

1. a kind of fingerprint identification method, which comprises the following steps:

Detect the first capacitor value that the target object contacted with fingerprint sensor generates；

Judge whether the order of magnitude of the first capacitor value is consistent with the order of magnitude of preset second capacitance, wherein described Two capacitances are the capacitances that the registered fingerprint contacted with the fingerprint sensor generates；

If the order-of-magnitude agreement of the order of magnitude of the first capacitor value and second capacitance, detects the target object Whether matched with the registered fingerprint；

If the target object and the registered fingerprint matching degree meet preset threshold, executed according to preset control instruction Corresponding operating；Wherein, different control instructions are determined from the registered fingerprint matching degree according to the different target objects.

2. the method as described in claim 1, which is characterized in that further include:

If the order of magnitude of the first capacitor value and the order of magnitude of second capacitance are inconsistent, feedback identifying is unsuccessfully rung It answers.

3. the method as described in claim 1, which is characterized in that further include:

If the target object and the registered fingerprint matching degree are unsatisfactory for preset threshold, feedback identifying failure response.

4. the method as described in claim 1, which is characterized in that produced in the target object contacted with fingerprint sensor that detects Before raw first capacitor value, further includes:

Obtain the registered fingerprint of user's typing；

The registered fingerprint is detected to contact the second capacitance of the fingerprint sensor generation and store.

5. the method as described in claim 1, which is characterized in that described to execute corresponding operating, packet according to preset control instruction It includes:

According to preset unlock instruction to the unlocking screen of terminal device；Or,

Delivery operation is carried out to order according to preset payment instruction.

6. a kind of fingerprint identification device characterized by comprising

First detection module, the first capacitor value generated for detecting the target object contacted with fingerprint sensor；

Judgment module, for judge the first capacitor value the order of magnitude and preset second capacitance the order of magnitude whether one It causes, wherein second capacitance is the capacitance that the registered fingerprint contacted with the fingerprint sensor generates；

First processing module, when for the order of magnitude in the first capacitor value and the order-of-magnitude agreement of second capacitance, Detect whether the target object matches with the registered fingerprint；

Second processing module, for when the target object and the registered fingerprint matching degree meet preset threshold, according to pre- If control instruction execute corresponding operating；Wherein, it is determined according to the different target objects and the registered fingerprint matching degree Different control instructions.

7. device as claimed in claim 6, which is characterized in that the first processing module is also used to:

In the order of magnitude of the first capacitor value and the inconsistent order of magnitude of second capacitance, feedback identifying is unsuccessfully rung It answers.

8. device as claimed in claim 6, which is characterized in that the Second processing module is also used to:

When the target object and the registered fingerprint matching degree are unsatisfactory for preset threshold, feedback identifying failure response.

9. device as claimed in claim 6, which is characterized in that further include:

Module is obtained, for obtaining the registered fingerprint of user's typing；

Second detection module contacts the second capacitance that the fingerprint sensor generates and deposits for detecting the registered fingerprint Storage.

10. device as claimed in claim 6, which is characterized in that the Second processing module is used for:

According to preset unlock instruction to the unlocking screen of terminal device；Or,

Delivery operation is carried out to order according to preset payment instruction.

11. a kind of terminal device characterized by comprising shell, processor, memory, circuit board and power circuit, wherein The circuit board is placed in the space interior that the shell surrounds, and the processor and the memory are arranged in the circuit board On；The power circuit, for each circuit or the device power supply for terminal device；The memory is for storing executable journey Sequence code；The processor is run and the executable journey by reading the executable program code stored in the memory The corresponding program of sequence code, for executing following steps:

Detect the first capacitor value that the target object contacted with fingerprint sensor generates；

Judge whether the order of magnitude of the first capacitor value is consistent with the order of magnitude of preset second capacitance, wherein described Two capacitances are the capacitances that the registered fingerprint contacted with the fingerprint sensor generates；

If the order-of-magnitude agreement of the order of magnitude of the first capacitor value and second capacitance, detects the target object Whether matched with the registered fingerprint；

If the target object and the registered fingerprint matching degree meet preset threshold, executed according to preset control instruction Corresponding operating；Wherein, different control instructions are determined from the registered fingerprint matching degree according to the different target objects.