CN107463900B - Terminal with fingerprint identification function - Google Patents
Terminal with fingerprint identification function Download PDFInfo
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- CN107463900B CN107463900B CN201710656595.XA CN201710656595A CN107463900B CN 107463900 B CN107463900 B CN 107463900B CN 201710656595 A CN201710656595 A CN 201710656595A CN 107463900 B CN107463900 B CN 107463900B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/12—Fingerprints or palmprints
- G06V40/13—Sensors therefor
- G06V40/1306—Sensors therefor non-optical, e.g. ultrasonic or capacitive sensing
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/12—Fingerprints or palmprints
- G06V40/1365—Matching; Classification
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
- H04M1/026—Details of the structure or mounting of specific components
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Abstract
The disclosure relates to a terminal with a fingerprint identification function, and belongs to the technical field of computers. This terminal includes treater, ultrasonic sensor and glass apron, and ultrasonic sensor includes transmitter and a plurality of receiver, wherein: the ultrasonic sensor is arranged on the lower layer of the glass cover plate; the ultrasonic sensor is used for controlling the transmitter to transmit ultrasonic signals according to different transmission angles after receiving a fingerprint detection instruction sent by the processor; controlling a receiver to receive an ultrasonic signal reflected by an object; determining fingerprint image data according to the transmitting time point, the receiving time point and the transmitting angle of each ultrasonic signal and the distance between the receiver and the transmitter corresponding to each ultrasonic signal, and sending the fingerprint image data to the processor; and the processor is used for executing a preset control instruction if the fingerprint image data is matched with the prestored reference fingerprint image data. By adopting the method and the device, the bearing capacity of the terminal can be stronger.
Description
Technical Field
The present disclosure relates to the field of computer technologies, and in particular, to a terminal having a fingerprint identification function.
Background
With the development of computer technology, terminals such as mobile phones and the like gradually become necessary products of modern people, and more new functions of the terminals bring more convenience to the life of users. In the process of using the terminal, in order to ensure the security of user information, the terminal is provided with a fingerprint identification function for performing operations with higher security requirements, such as unlocking or payment, on the terminal.
In the prior art, a part for realizing a fingerprint identification function in a terminal is a fingerprint detection part, the fingerprint detection part is a capacitive sensor, and because the penetration capability of the capacitive sensor is weak, the capacitive sensor cannot penetrate through a glass cover plate above a display screen of the terminal, holes are generally required to be punched on the glass cover plate of the terminal so as to arrange the capacitive sensor. Therefore, the glass cover plate of the terminal is provided with the holes, so that the integral structure of the glass cover plate is damaged, and the pressure bearing capacity of the terminal is poor.
Disclosure of Invention
To overcome the problems in the related art, the present disclosure provides a terminal having a fingerprint recognition function and a fingerprint recognition method. The technical scheme is as follows:
according to a first aspect of the embodiments of the present disclosure, there is provided a terminal having a fingerprint recognition function, the terminal including:
the terminal includes treater, ultrasonic sensor and glass apron, ultrasonic sensor includes transmitter and a plurality of receiver, wherein:
the ultrasonic sensor is arranged on the lower layer of the glass cover plate, and the processor is electrically connected with the ultrasonic sensor;
the ultrasonic sensor is used for controlling the transmitter to transmit ultrasonic signals according to different transmission angles after receiving a fingerprint detection instruction sent by the processor; controlling the receiver to receive ultrasonic signals reflected by an object; determining fingerprint image data according to the transmitting time point, the receiving time point and the transmitting angle of each ultrasonic signal and the distance between the receiver and the transmitter corresponding to each ultrasonic signal, and sending the fingerprint image data to the processor;
the processor is configured to execute a preset control instruction if the fingerprint image data matches pre-stored reference fingerprint image data.
Optionally, the ultrasonic sensor further includes a package cover plate, and the plurality of receivers are disposed at equal intervals at an edge position of the package cover plate.
In this way, the determined fingerprint image data can be made more accurate.
Optionally, the ultrasonic sensor further includes a package cover plate, the package cover plate is rectangular or square, and the plurality of receivers are four receivers;
the plurality of receivers are respectively disposed at four vertex positions of an upper surface of the package cover plate.
In this way, the determined fingerprint image data can be made more accurate.
Optionally, the ultrasonic sensor is disposed at a lower layer of the glass cover plate and near a lower edge of the terminal.
Optionally, the processor is further configured to:
and when detecting a starting instruction corresponding to the ultrasonic sensor, sending a fingerprint detection instruction to the ultrasonic sensor.
Thus, power consumption of the terminal can be saved.
Optionally, the ultrasonic sensor is configured to:
using the equation
Determining a distance h between each position point reflecting each ultrasonic signal on the object and the ultrasonic sensor, wherein d is a transmission distance of the ultrasonic signal, c is a distance between the transmitter and a receiver correspondingly receiving the ultrasonic signal, M is an included angle between a connecting line of the transmitter and the receiver correspondingly receiving the ultrasonic signal and a projection, N is an included angle between the projection and a straight line of the transmitting direction of the ultrasonic signal, and the projection is a vertical projection of the straight line of the transmitting direction of the ultrasonic signal in a plane where the plurality of receivers and the transmitter are located;
based on each determined distance, the fingerprint image data is determined.
Optionally, the ultrasonic sensor is further configured to:
and determining the fingerprint image data based on the difference value of each distance and a preset reference distance.
Optionally, the ultrasonic sensor is further configured to:
determining the fingerprint image data based on a difference of the each distance and a minimum value of the each distance.
Optionally, the processor is further configured to:
and after the execution of the preset control instruction is finished, controlling the ultrasonic sensor to be closed.
Thus, power consumption of the terminal can be saved.
Optionally, the processor is further configured to:
and after the execution of the preset control instruction is finished, controlling the ultrasonic sensor to enter a dormant state.
Thus, power consumption of the terminal can be saved.
Optionally, each receiver receives the ultrasonic signal which is transmitted by the transmitter to a preset area above the receiver corresponding to receive the ultrasonic signal in the upper surface of the glass cover plate according to different transmission angles.
According to a second aspect of the embodiments of the present disclosure, there is provided a fingerprint identification method, which is applied to a terminal, the terminal including a processor, an ultrasonic sensor and a glass cover plate, the ultrasonic sensor including a transmitter and a plurality of receivers, the ultrasonic sensor being disposed on a lower layer of the glass cover plate, the processor being electrically connected to the ultrasonic sensor, the method including:
transmitting ultrasonic signals according to different transmitting angles through the transmitter, and receiving the ultrasonic signals reflected by the object through the receiver;
determining fingerprint image data according to the transmitting time point, the receiving time point and the transmitting angle of each ultrasonic signal and the distance between the receiver and the transmitter corresponding to each ultrasonic signal;
and if the fingerprint image data is matched with the pre-stored reference fingerprint image data, executing a preset control instruction.
Optionally, the determining fingerprint image data according to the transmission time point, the reception time point, and the transmission angle of each ultrasonic signal, and the distance between the receiver and the transmitter corresponding to each ultrasonic signal includes:
using the equation
Determining the distance h between each position point reflecting each ultrasonic signal on the object and the ultrasonic sensor, wherein d is the transmission distance of the ultrasonic signal, c is the distance between the transmitter and the receiver correspondingly receiving the ultrasonic signal, M is the included angle between the connecting line of the transmitter and the receiver correspondingly receiving the ultrasonic signal and the projection, and N is the included angle between the projection and the straight line of the transmitting direction of the ultrasonic signal,the projection is vertical projection of a straight line where the transmitting direction of the ultrasonic signal is located in a plane where the plurality of receivers and the transmitters are located;
based on each determined distance, the fingerprint image data is determined.
Optionally, the determining the fingerprint image data based on each determined distance includes:
determining the fingerprint image data based on the difference value of each distance and a preset reference distance; alternatively, the first and second electrodes may be,
determining the fingerprint image data based on a difference of the each distance and a minimum value of the each distance.
Optionally, the method further includes:
after the execution of the preset control instruction is finished, controlling the ultrasonic sensor to be closed; alternatively, the first and second electrodes may be,
and after the execution of the preset control instruction is finished, controlling the ultrasonic sensor to enter a dormant state.
The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects:
in the disclosed embodiment, the terminal includes treater, ultrasonic sensor and glass apron, and ultrasonic sensor includes transmitter and a plurality of receivers, wherein: ultrasonic sensor sets up the lower floor at glass apron, treater and ultrasonic sensor electric connection, ultrasonic sensor, be used for after receiving the fingerprint detection instruction that the treater sent, control transmitter is according to the transmission angle transmission ultrasonic signal of difference, control receiver receives the ultrasonic signal who is reflected back by the object, according to the emission time point of every ultrasonic signal, the receiving time point, emission angle, and the distance between receiver and the transmitter that every ultrasonic signal corresponds, confirm fingerprint image data, send fingerprint image data to the treater, a processor, be used for if fingerprint image data and the benchmark fingerprint image data of prestoring match, then execute preset control instruction. Therefore, the fingerprint detection component is the ultrasonic sensor which is arranged on the lower layer of the glass cover plate, the integral structure of the glass cover plate cannot be damaged, and the pressure bearing capacity of the glass cover plate is stronger.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure. In the drawings:
fig. 1 is a schematic diagram illustrating a structure of a terminal having a fingerprint recognition function according to an exemplary embodiment;
FIG. 2 is a schematic diagram illustrating an ultrasonic sensor configuration according to an exemplary embodiment;
FIG. 3 is a schematic diagram illustrating an ultrasonic sensor configuration according to an exemplary embodiment;
FIG. 4 is a schematic diagram illustrating the transmission of an ultrasonic signal according to an exemplary embodiment;
FIG. 5 is a schematic diagram illustrating the transmission of an ultrasonic signal according to an exemplary embodiment;
FIG. 6 is a flowchart illustrating a method of fingerprint detection according to an example embodiment.
Description of the figures
1. Processor 2, ultrasonic sensor
21. Emitter 22, receiver
23. Encapsulation cover plate 3 and glass cover plate
With the foregoing drawings in mind, certain embodiments of the disclosure have been shown and described in more detail below. These drawings and written description are not intended to limit the scope of the disclosed concepts in any way, but rather to illustrate the concepts of the disclosure to those skilled in the art by reference to specific embodiments.
Detailed Description
To make the objects, technical solutions and advantages of the present disclosure more apparent, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.
The embodiment of the present disclosure provides a terminal with a fingerprint identification function, which may be a mobile terminal such as a mobile phone, as shown in fig. 1, the terminal includes a processor 1, an ultrasonic sensor 2 and a glass cover plate 3, the ultrasonic sensor 2 includes a transmitter 21 and a plurality of receivers 22, wherein: the ultrasonic sensor 2 is arranged at the lower layer of the glass cover plate 3, and the processor 1 is electrically connected with the ultrasonic sensor 2; the ultrasonic sensor 2 is used for controlling the transmitter 21 to transmit ultrasonic signals according to different transmission angles after receiving a fingerprint detection instruction sent by the processor 1; the control receiver 22 receives the ultrasonic signal reflected by the object; determining fingerprint image data according to the transmitting time point, the receiving time point and the transmitting angle of each ultrasonic signal and the distance between the receiver 22 and the transmitter 21 corresponding to each ultrasonic signal, and sending the fingerprint image data to the processor 1; and a processor 1 for executing a preset control instruction if the fingerprint image data matches pre-stored reference fingerprint image data.
In implementation, the terminal may include a processor 1, an ultrasonic sensor 2, and a glass cover plate 3, wherein the ultrasonic sensor 2 includes a transmitter 21 and a plurality of receivers 22. The ultrasonic sensor 2 is disposed below the glass cover 3, and may be disposed on the lower surface of the glass cover 3, for example. By using the structure, the glass cover plate 3 is not provided with the opening, so that the strength of the glass cover plate 3 can be improved, and the bearing capacity of the glass cover plate 3 is stronger.
The processor 1 stores reference fingerprint image data in advance, and the reference fingerprint image data may be an average value of fingerprint image data of a user obtained by performing fingerprint recognition a plurality of times. The fingerprint setting option is displayed on a fingerprint setting page of the terminal, a user can click the fingerprint setting option, the terminal can receive a fingerprint setting instruction, the processor 1 can send a fingerprint detection instruction to the ultrasonic sensor 2, the ultrasonic sensor 2 can determine fingerprint image data for multiple times (such as 3 times) after receiving the fingerprint detection instruction, the ultrasonic sensor 2 can send the fingerprint image data determined for multiple times to the processor 1, and the processor 1 can calculate the average value of the fingerprint image data determined for multiple times to serve as reference fingerprint image data.
After receiving the fingerprint image data sent by the ultrasonic sensor 2, the processor 1 may compare the received fingerprint image data with the reference fingerprint image data, determine the similarity between the received fingerprint image data and the reference fingerprint image data, determine that the fingerprint image data matches the reference fingerprint image if the determined similarity is within a preset similarity range (e.g., the similarity is greater than ninety-five percent, etc.), and may execute a preset control instruction in combination with the current state of the terminal. For example, the similarity determined by the processor 1 is within a preset similarity range, if the current state of the terminal is the state to be unlocked, the processor 1 may execute the unlocking process, and if the current state of the terminal is the state to be paid, the processor 1 may execute the payment process.
In the embodiment of the present disclosure, the transmission angle of the ultrasonic signal transmitted by the transmitter 21 is the same each time the fingerprint detection is performed, and may be preset by a technician and stored in the terminal.
Optionally, each receiver receives the ultrasonic signal which is transmitted by the transmitter to a preset area above the receiver corresponding to receive the ultrasonic signal in the upper surface of the glass cover plate according to different transmission angles.
In implementation, the fingerprint detection area of a general terminal is directly above the ultrasonic sensor 2, the size of the fingerprint detection area can be preset by technicians, each receiver 22 corresponds to the detection area of the receiver, namely, each receiver 22 receives ultrasonic signals transmitted by the transmitter 21 to the area (preset area) of the pipe divided by the receiver according to different transmission angles, and the detection area of the pipe divided by the receiver is the area above the receiver in the upper surface of the glass cover plate. For example, the ultrasonic sensor 2 includes a package cover 23, the package cover 23 is shaped like a rectangular parallelepiped, the plurality of receivers 22 are four receivers 22, the plurality of receivers 22 are respectively disposed at four vertex positions of the upper surface of the package cover 23, the package cover 23 is divided into four small rectangles, and the ultrasonic signal received by each receiver 22 is emitted from the emitter 21 to a region directly above the small rectangular region to which the receiver belongs, and has the same size as the small rectangular region. Thus, with a plurality of receivers 21, fingerprint data of edges can be detected, so that the detected fingerprint data can be made more accurate.
When detecting a fingerprint, the processor 1 may control the transmitter 21 to transmit an ultrasonic signal to a preset area, and control the receiver 22 corresponding to the preset area to receive the reflected ultrasonic signal (other receivers 22 are in an off state), and when the detection of the preset area is completed, the processor 1 controls the transmitter 21 to transmit an ultrasonic signal to another preset area, and controls the receiver 22 of the other preset area to receive the reflected ultrasonic signal until each preset area is completely detected.
In addition, the processor 1 may control the transmitter 21 to transmit the ultrasonic signal to the area detected by each receiver 22 in turn, for example, there are three receivers 22, and after transmitting the ultrasonic signal to the area detected by the first receiver 22 once, the ultrasonic signal is transmitted to the area detected by the second receiver 22 once, and finally the ultrasonic signal is transmitted to the area detected by the third receiver 22 once. And then continuing to transmit ultrasonic signals in the next round until the detection is finished.
In the embodiment of the present disclosure, for the above-mentioned preset area corresponding to each receiver 22, the transmission angle of the ultrasonic signal transmitted by the transmitter 21 is the same each time fingerprint detection is performed, and may be preset by a technician and stored in the terminal.
It should be noted that, the number of the transmitters is one, and the method for determining the transmission angle by the technician generally includes setting a plurality of detection points in a preset area, connecting each detection point with the transmitter 21 to obtain a plurality of transmission angles, where the angles M and N mentioned later both represent the transmission angles.
Alternatively, the number of the emitters 21 included in the ultrasonic sensor 2 may be one, and the number of the emitters 21 is exemplified as one in the embodiment of the present invention.
Optionally, the ultrasonic sensor 2 further includes a package cover 23, and the plurality of receivers 22 are disposed at equal intervals at an edge position of the package cover 23.
In implementation, the ultrasonic sensor 2 may further include a package cover 23, the plurality of receivers 22 may be disposed on the package cover 23, and the plurality of receivers 22 may be disposed at equal intervals at an edge position of the package cover 23. For example, the upper surface of the package cover 23 is circular, and the plurality of receivers 22 may be disposed on both sides of two mutually perpendicular diameters. In addition, one transmitter 21 included in the ultrasonic sensor 2 may be disposed at a central position of the package cover 23.
Optionally, the ultrasonic sensor 2 further includes a package cover plate 23, the package cover plate 23 is a rectangular parallelepiped or a cube, and the plurality of receivers 22 are four receivers 22; the plurality of receivers 22 are respectively disposed at four vertex positions of the upper surface of the package cover plate 23.
In implementation, as shown in fig. 2, the ultrasonic sensor 2 may further include a package cover 23, the package cover 23 may be in a shape of a cube or a rectangular parallelepiped, and the plurality of receivers 22 may be respectively disposed at four vertex positions of the upper surface of the package cover 23, that is, at four vertex positions of the upper surface of the cube or at four vertex positions of the upper surface of the rectangular parallelepiped. In the case of only one emitter 21, the emitter 21 may be disposed at the center of the upper surface of the package cover 23.
Optionally, the ultrasonic sensor 2 is disposed at the lower layer of the glass cover plate 3 near the lower edge of the terminal.
In practice, the ultrasonic sensor 2 may be disposed at a lower layer of the glass cover 3 and may be disposed near a lower edge of the terminal, for example, as shown in fig. 3, the ultrasonic sensor 2 is disposed at a lower layer of the glass cover 3 and is disposed near a center of the lower edge.
Optionally, the processor 1 is further configured to: when detecting an on instruction corresponding to the ultrasonic sensor 2, a fingerprint detection instruction is sent to the ultrasonic sensor 2.
In implementation, in order to save the electric quantity of the terminal, the ultrasonic sensor 2 is triggered and then turned on, and a user can use a finger to double-click the glass cover plate 3, or click the power key, or use the finger to press the glass cover plate 3 right above the ultrasonic sensor 2, and the processor 1 detects the turn-on instruction of the ultrasonic sensor 2 and then sends a fingerprint detection instruction to the ultrasonic sensor 2.
Optionally, the ultrasonic sensor 2 is configured to:
using the equation
Determining the distance h between the respective location on the object from which each ultrasonic signal is reflected and the ultrasonic sensor 2, where d is the transmission distance of the ultrasonic signal and c is the distance between the transmitter 21 and the receiver 22 corresponding to the received ultrasonic signalM is an included angle between a connection line of the transmitter 21 and the receiver 22 which correspondingly receives the ultrasonic signal and the projection, N is an included angle between the projection and a straight line in which the transmitting direction of the ultrasonic signal is located, and the projection is a vertical projection of the straight line in which the transmitting direction of the ultrasonic signal is located in a plane in which the plurality of receivers 22 and the transmitters 21 are located; based on each determined distance, fingerprint image data is determined.
In practice, the object in the embodiment of the present invention is a finger, and the transmitter 21 transmits the ultrasonic signal outwards, so that the ultrasonic signal is reflected or scattered due to the unevenness of the surface of the fingerprint and received by the receiver 22, and the side view of the process is shown in fig. 4.
In the embodiment of the present invention, any position point on the finger is taken as an example for explanation, as shown in fig. 5, any position point on the finger is T, a position point where the transmitter 21 is located is P, a position point where the receiver 22 corresponding to receiving the ultrasonic signal is located is a, a distance between the receiver 22 corresponding to receiving the ultrasonic signal and the transmitter 21 is represented by c, M and N both represent transmission angles, M represents an angle between PA and the projection, N represents an angle between the projection and PT, PS represents a vertical projection of PT on a plane where the plurality of receivers 22 and the transmitter 21 are located, T represents a vertical projection point on a plane where the transmitter 21 and the plurality of receivers 22 are located is S, and S represents a vertical line SD of AP passing S, and TS and TD are connected, since S is a vertical projection point of T on a plane where the transmitter 21 and the plurality of receivers 22 are located, TS is perpendicular to the plane APs, and TS is also perpendicular to the AP, then there is AP perpendicular to the plane formed by the TDS, and thus AP perpendicular to the TD.
In the triangular TSP, since TS is perpendicular to SP, TS is perpendicular to SP
In triangular SDP, since SD is perpendicular to PD, combining equation (1),
in triangular APS, binding formula (4),
in a triangular ASD, since there is an SD perpendicular to the AD, the AS2＝AD2+SD2(6)；
In a triangular ATS, the AT is perpendicular to the AS due to TS2＝AS2+TS2＝AS2+h2(7)；
Binding formulae (6) and (7), AT2＝AS2+TS2＝AD2+SD2+h2(8)；
Combining equations (8), (3) and (5), an equation can be obtained
D is the transmission distance of the ultrasonic signal, so d is AT + TP (10);
obtained by combining the formulae (2), (9) and (10),
equation (11) can be simplified
Since d is the transmission distance of the ultrasonic signal, it may be equal to Δ t × v. Δ t is a difference between a reception time point and a transmission time point of the ultrasonic signal, and v is a transmission speed of the ultrasonic signal.
In this way, since there is only one unknown h in equation (12), h, i.e., the distance between each position point of the object reflecting the ultrasonic signal and the ultrasonic sensor 2, can be obtained.
The ultrasonic sensor 2 can calculate the distance between each position point of the object reflecting the ultrasonic signal and the ultrasonic sensor 2 by using the formula (12)
And
in this way, since the position of P is fixed, the position coordinate of P is determined, and based on the position coordinate of P and M, the position coordinate of S can be determined, for example, assuming that the position coordinate of P is (0, 0), and taking the straight line where PA is located as the horizontal axis, a rectangular coordinate system is established in the plane APS, and SD and PD, which are the vertical coordinate and the horizontal coordinate of the position coordinate of S, can be calculated by equations (3) and (4). Since S is the vertical projection point of T, the position coordinate of T can be determined, and the position coordinate of each position point of the ultrasonic signal reflected on each finger is obtained.
Based on the above calculation, the distance between each position point on the object and the ultrasonic sensor 2 may be obtained, or the position coordinates of each position point may be calculated, and then the fingerprint image data may be specified using each distance specified and the position coordinates of each position point.
Alternatively, in the foregoing description, the terminal is preset with a detection point, and based on the transmission angle, it can be known which detection point the distance h between the ultrasonic sensor 2 and the object is calculated.
Optionally, there are two ways to determine the fingerprint image data using each of the determined distances, which are described in detail below:
the first method is as follows: fingerprint image data is determined based on a difference between each distance and a preset reference distance.
In implementation, the ultrasonic sensor 2 stores a preset reference distance, and a technician may set the reference distance in the terminal before the terminal leaves a factory. After the ultrasonic sensor 2 determines a plurality of distances corresponding to a plurality of position points of the reflected ultrasonic signal, the reference distance is subtracted from each determined distance to obtain a difference value between each distance and the reference distance, if the difference value corresponding to a certain position point and a value corresponding to a ridge of a fingerprint are smaller than a preset value (the preset value can be preset by a technician and is stored in the terminal), the position point is determined to be the ridge of the fingerprint, and if the difference value corresponding to the certain position point and the value corresponding to a valley of the fingerprint are larger than the preset value, the position point is determined to be the valley of the fingerprint, so that whether each position point is the valley or the ridge can be determined, fingerprint image data is determined, and the fingerprint image data is image data formed by the ridge and the ridge.
It should be noted that, the value corresponding to the ridge of the fingerprint may be preset by a technician, for example, 0.05mm, and the value corresponding to the valley of the fingerprint may also be preset by a technician, for example, 0.07mm, and when determining the reference fingerprint image data, after determining a plurality of distances, the difference between the predetermined reference distance and the predetermined reference distance is also used for determining the reference fingerprint image data, and the determination method is the same as the above method.
The second method comprises the following steps: fingerprint image data is determined based on a difference of each distance from a minimum value in each distance.
In implementation, after the ultrasonic sensor 2 determines a plurality of distances corresponding to a plurality of position points of the reflected ultrasonic signal, the minimum distance of the distances is subtracted from each determined distance to obtain a difference value between each distance and the minimum distance, if the difference value between the difference value corresponding to a certain position point and a value corresponding to a ridge of a fingerprint is smaller than a preset value (the preset value can be preset by a technician and stored in the terminal), the position point is determined to be the ridge, and if the difference value between the difference value corresponding to a certain position point and the value corresponding to the valley of the fingerprint is larger than the preset value, the position point is determined to be the valley, so that whether each position point is the valley or the ridge can be determined, fingerprint image data is determined, and the fingerprint image data is image data composed of the ridge and the ridge.
It should be noted that, the value corresponding to the ridge of the fingerprint may be preset by a technician, for example, 0.05mm, and the value corresponding to the valley of the fingerprint may also be preset by a technician, for example, 0.07mm, and when determining the reference fingerprint image data, after determining the plurality of distances, the difference value from the minimum distance among the plurality of determined distances is also used for determining the reference fingerprint image data, and the determination method is the same as the above method.
Optionally, after the execution of the preset control instruction is completed, in order to save power consumption of the terminal, the processor 1 is further configured to: and after the execution of the preset control instruction is finished, controlling the ultrasonic sensor 2 to be closed.
In implementation, after the processor 1 executes the preset control instruction, the processor 1 may send a shutdown instruction to the ultrasonic sensor 2, and after the ultrasonic sensor 2 receives the shutdown instruction, the power-off operation may be performed. Thus, the power of the terminal can be saved. For example, the fingerprint image data determined by the processor 1 is matched with the reference fingerprint image data, the processor 1 may execute an unlocking instruction after determining that the current state is the to-be-unlocked state, then the processor 1 sends a closing instruction to the ultrasonic sensor 2, and the ultrasonic sensor 2 may perform a power-off operation after receiving the closing instruction.
Optionally, after the execution of the preset control instruction is completed, in order to save power consumption of the terminal, the processor 1 is further configured to: after the execution of the preset control instruction is completed, the ultrasonic sensor 2 is controlled to enter a dormant state.
In implementation, after the processor 1 controls and executes a preset control instruction, the processor 1 may send a standby instruction to the ultrasonic sensor 2, and after the ultrasonic sensor 2 receives the standby instruction, the processor may control itself to enter a sleep state. Thus, the power of the terminal can be saved.
In the disclosed embodiment, the terminal includes a processor 1, an ultrasonic sensor 2 and a glass cover plate 3, the ultrasonic sensor 2 includes a transmitter 21 and a plurality of receivers 22, wherein: ultrasonic sensor 2 sets up the lower floor at glass apron 3, treater 1 and ultrasonic sensor 2 electric connection, ultrasonic sensor 2, be used for after receiving the fingerprint detection instruction that treater 1 sent, control transmitter 21 is according to different emission angle transmission ultrasonic signal, control receiver 22 receives the ultrasonic signal who is reflected back by the object, according to the emission time point of every ultrasonic signal, the receiving time point, the emission angle, and the distance between receiver 22 and the transmitter 21 that every ultrasonic signal corresponds, confirm fingerprint image data, send fingerprint image data to treater 1, be used for if fingerprint image data matches with the benchmark fingerprint image data of prestoring, then execute preset control instruction. Like this, because fingerprint detection part is ultrasonic sensor 2, and ultrasonic sensor 2 sets up the lower floor at glass apron 3, can not destroy glass apron 3's overall structure to make glass apron 3's pressure-bearing capacity than stronger.
Example two
The embodiment of the present disclosure provides a fingerprint identification method, an execution main body of the method is a terminal, the terminal can be a mobile terminal such as a mobile phone, the terminal includes a processor 1, an ultrasonic sensor 2 and a glass cover plate 3, the ultrasonic sensor 2 includes a transmitter 21 and a plurality of receivers 22, the ultrasonic sensor 2 is disposed on a lower layer of the glass cover plate 3, and the processor 1 is electrically connected with the ultrasonic sensor 2.
As shown in fig. 6, the execution flow of the method may be as follows:
in step 601, ultrasonic signals are transmitted at different transmission angles by the transmitter 21, and the ultrasonic signals reflected by the object are received by the receiver 22.
In step 602, fingerprint image data is determined according to the transmission time point, the reception time point, the transmission angle of each ultrasonic signal, and the distance between the receiver 22 and the transmitter 21 corresponding to each ultrasonic signal.
Alternatively, the method of determining fingerprint image data may be as follows:
using the equation
Determining the distance h between the position on the object reflecting each ultrasonic signal and the ultrasonic sensor 2, where d is the transmission distance of the ultrasonic signal, c is the distance between the transmitter 21 and the receiver 22 corresponding to the received ultrasonic signal, and M is the distance between the transmitter 21 and the receiver 22 corresponding to the received ultrasonic signalThe included angle between the connecting line and the projection, N is the included angle between the projection and the straight line of the transmitting direction of the ultrasonic signal, and the projection is the vertical projection of the straight line of the transmitting direction of the ultrasonic signal in the plane where the plurality of receivers 22 and the transmitters 21 are located; based on each determined distance, fingerprint image data is determined.
Optionally, based on each determined distance, the method for determining fingerprint image data may be as follows:
determining fingerprint image data based on a difference between each distance and a preset reference distance; alternatively, the first and second electrodes may be,
fingerprint image data is determined based on a difference of each distance from a minimum value in each distance.
In step 603, if the fingerprint image data matches pre-stored reference fingerprint image data, a preset control instruction is executed.
Optionally, in order to save the power of the terminal, the ultrasonic sensor 2 may be further controlled to be turned off or sleep, and the corresponding processing may be as follows:
after the execution of the preset control instruction is finished, controlling the ultrasonic sensor 2 to be closed; alternatively, the first and second electrodes may be,
after the execution of the preset control instruction is completed, the ultrasonic sensor 2 is controlled to enter a dormant state.
For the detailed implementation of the above method, reference is made to the first embodiment, and details are not described here.
In the disclosed embodiment, the terminal includes a processor 1, an ultrasonic sensor 2 and a glass cover plate 3, the ultrasonic sensor 2 includes a transmitter 21 and a plurality of receivers 22, wherein: ultrasonic sensor 2 sets up the lower floor at glass apron 3, treater 1 and ultrasonic sensor 2 electric connection, ultrasonic sensor 2, be used for after receiving the fingerprint detection instruction that treater 1 sent, control transmitter 21 is according to different emission angle transmission ultrasonic signal, control receiver 22 receives the ultrasonic signal who is reflected back by the object, according to the emission time point of every ultrasonic signal, the receiving time point, the emission angle, and the distance between receiver 22 and the transmitter 21 that every ultrasonic signal corresponds, confirm fingerprint image data, send fingerprint image data to treater 1, be used for if fingerprint image data matches with the benchmark fingerprint image data of prestoring, then execute preset control instruction. Like this, because fingerprint detection part is ultrasonic sensor 2, and ultrasonic sensor 2 sets up the lower floor at glass apron 3, can not destroy glass apron 3's overall structure to make glass apron 3's pressure-bearing capacity than stronger.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.
Claims (10)
1. A terminal having a fingerprint recognition function, the terminal comprising a processor, an ultrasonic sensor and a glass cover plate, the ultrasonic sensor comprising a transmitter and a plurality of receivers, wherein:
the ultrasonic sensor is arranged on the lower layer of the glass cover plate, and the processor is electrically connected with the ultrasonic sensor;
the ultrasonic sensor is used for controlling the transmitter to transmit ultrasonic signals according to different transmission angles after receiving a fingerprint detection instruction sent by the processor; controlling the receiver to receive ultrasonic signals reflected by an object; determining fingerprint image data according to the transmitting time point, the receiving time point and the transmitting angle of each ultrasonic signal and the distance between the receiver and the transmitter corresponding to each ultrasonic signal, and sending the fingerprint image data to the processor;
the processor is used for executing a preset control instruction if the fingerprint image data is matched with pre-stored reference fingerprint image data;
the ultrasonic sensor is used for:
using the equation
Determining a distance h between each position point reflecting each ultrasonic signal on the object and the ultrasonic sensor, wherein d is a transmission distance of the ultrasonic signal, c is a distance between the transmitter and a receiver correspondingly receiving the ultrasonic signal, M is an included angle between a connecting line of the transmitter and the receiver correspondingly receiving the ultrasonic signal and a projection, N is an included angle between the projection and a straight line of the transmitting direction of the ultrasonic signal, and the projection is a vertical projection of the straight line of the transmitting direction of the ultrasonic signal in a plane where the plurality of receivers and the transmitter are located;
determining the fingerprint image data based on each determined distance;
the ultrasonic sensor is further configured to:
determining the fingerprint image data based on the difference value of each distance and a preset reference distance; alternatively, the fingerprint image data is determined based on a difference of the each distance and a minimum value of the each distance.
2. A terminal according to claim 1, wherein the ultrasonic sensor further comprises a package cover, the plurality of receivers being equally spaced at edge locations of the package cover.
3. The terminal of claim 1, wherein the ultrasonic sensor further comprises a package cover plate, the package cover plate is in the shape of a cuboid or a cube, and the plurality of receivers are four receivers;
the plurality of receivers are respectively disposed at four vertex positions of an upper surface of the package cover plate.
4. A terminal according to claim 1, wherein the ultrasonic sensor is disposed at a lower layer of the glass cover plate near a lower edge of the terminal.
5. The terminal of claim 1, wherein the processor is further configured to:
and when detecting a starting instruction corresponding to the ultrasonic sensor, sending a fingerprint detection instruction to the ultrasonic sensor.
6. The terminal of claim 1, wherein the processor is further configured to:
and after the execution of the preset control instruction is finished, controlling the ultrasonic sensor to be closed.
7. The terminal of claim 1, wherein the processor is further configured to:
and after the execution of the preset control instruction is finished, controlling the ultrasonic sensor to enter a dormant state.
8. A terminal according to claim 1, wherein each receiver receives ultrasonic signals transmitted by the transmitter at different transmission angles to a predetermined area of the upper surface of the glass cover plate above the corresponding receiver for receiving ultrasonic signals.
9. A fingerprint identification method is applied to a terminal, the terminal comprises a processor, an ultrasonic sensor and a glass cover plate, the ultrasonic sensor comprises a transmitter and a plurality of receivers, the ultrasonic sensor is arranged on the lower layer of the glass cover plate, and the processor is electrically connected with the ultrasonic sensor, and the method comprises the following steps:
transmitting ultrasonic signals according to different transmitting angles through the transmitter, and receiving the ultrasonic signals reflected by the object through the receiver;
determining fingerprint image data according to the transmitting time point, the receiving time point and the transmitting angle of each ultrasonic signal and the distance between the receiver and the transmitter corresponding to each ultrasonic signal;
if the fingerprint image data is matched with pre-stored reference fingerprint image data, executing a preset control instruction;
the determining fingerprint image data according to the transmitting time point, the receiving time point and the transmitting angle of each ultrasonic signal and the distance between the receiver and the transmitter corresponding to each ultrasonic signal comprises:
using the equation
Determining a distance h between each position point reflecting each ultrasonic signal on the object and the ultrasonic sensor, wherein d is a transmission distance of the ultrasonic signal, c is a distance between the transmitter and a receiver correspondingly receiving the ultrasonic signal, M is an included angle between a connecting line of the transmitter and the receiver correspondingly receiving the ultrasonic signal and a projection, N is an included angle between the projection and a straight line of the transmitting direction of the ultrasonic signal, and the projection is a vertical projection of the straight line of the transmitting direction of the ultrasonic signal in a plane where the plurality of receivers and the transmitter are located;
determining the fingerprint image data based on each determined distance;
determining the fingerprint image data based on each determined distance, comprising:
determining the fingerprint image data based on the difference value of each distance and a preset reference distance; alternatively, the first and second electrodes may be,
determining the fingerprint image data based on a difference of the each distance and a minimum value of the each distance.
10. The method of claim 9, further comprising:
after the execution of the preset control instruction is finished, controlling the ultrasonic sensor to be closed; alternatively, the first and second electrodes may be,
and after the execution of the preset control instruction is finished, controlling the ultrasonic sensor to enter a dormant state.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710656595.XA CN107463900B (en) | 2017-08-03 | 2017-08-03 | Terminal with fingerprint identification function |
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| CN201710656595.XA CN107463900B (en) | 2017-08-03 | 2017-08-03 | Terminal with fingerprint identification function |
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| CN107463900B true CN107463900B (en) | 2020-11-20 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108667963B (en) | 2018-04-23 | 2019-04-16 | Oppo广东移动通信有限公司 | Electronic equipment |
| CN110286738B (en) | 2019-06-29 | 2021-06-08 | Oppo广东移动通信有限公司 | Fingerprint acquisition method and related product |
| CN110414410B (en) * | 2019-07-24 | 2022-03-11 | Oppo广东移动通信有限公司 | Fingerprint acquisition method and related product |
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