Terminal, fingerprint recognition method and device

Abstract

The present disclosure relates to a terminal, a fingerprint recognition method and a device. The terminal includes: a housing, the housing including a front shell, a rear shell and a middle frame located between the front shell and the rear shell, at least one ultrasonic fingerprint sensor located on the inner wall of the middle frame, the ultrasonic fingerprint sensor being configured to emit ultrasonic waves capable of passing through the middle frame and receive ultrasonic waves reflected by a user's hand, and generate an electrical signal of fingerprint information according to the reflected ultrasonic waves; a controller located in the housing and electrically connected to the at least one ultrasonic fingerprint sensor, the controller being configured to control the ultrasonic fingerprint sensor and convert the electrical signal of fingerprint information collected by the ultrasonic fingerprint sensor into a fingerprint image. This technical solution can completely hide the module for collecting fingerprints inside the housing, enhance the integrity of the terminal's appearance design and the overall aesthetics of the whole machine, and reduce the number of openings, thereby reducing the manufacturing difficulty and cost of the housing.

Description

Technical Field

[0001] The present disclosure relates to the technical field of terminals, and in particular, to a terminal, a fingerprint recognition method and device. Background Art

[0002] Fingerprint recognition technology has become a standard feature of flagship models of mainstream mobile terminal manufacturers. Fingerprint recognition can not only be used for functions such as unlocking and waking up mobile terminals, but also serve as a barrier to protect the data information in terminal devices. At the same time, with the development of terminal technology, the use of fingerprint recognition technology to achieve mobile secure payment is also becoming more and more widespread. Summary of the Invention

[0003] Embodiments of the present disclosure provide a terminal, a fingerprint recognition method and device. The technical solutions are as follows:

[0004] According to a first aspect of embodiments of the present disclosure, a terminal is provided. The terminal includes a housing, the housing includes a front housing, a rear housing, and a middle frame located between the front housing and the rear housing. The terminal further includes:

[0005] At least one ultrasonic fingerprint sensor, located on the inner wall of the middle frame. The ultrasonic fingerprint sensor is configured to emit ultrasonic waves that can penetrate the middle frame and receive ultrasonic waves reflected by a user's hand, and generate an electrical signal of fingerprint information according to the reflected ultrasonic waves;

[0006] A controller, located inside the housing, electrically connected to the at least one ultrasonic fingerprint sensor. The controller is configured to control the ultrasonic fingerprint sensor and convert the electrical signal of fingerprint information collected by the ultrasonic fingerprint sensor into a fingerprint image.

[0007] In one embodiment, the terminal further includes:

[0008] At least one pressure sensor, corresponding to the ultrasonic fingerprint sensor one by one, located between the corresponding ultrasonic fingerprint sensor and the middle frame, electrically connected to the controller. The pressure sensor is configured to detect the pressure of the user's hand on the side wall where the corresponding ultrasonic fingerprint sensor is located;

[0009] The controller is configured to control the ultrasonic fingerprint sensor corresponding to the pressure sensor to obtain an electrical signal of fingerprint information when the pressure detected by the pressure sensor exceeds a preset pressure threshold.

[0010] In one embodiment, the terminal includes: two ultrasonic fingerprint sensors;

[0011] The two ultrasonic fingerprint sensors are respectively located on two opposite inner walls of the middle frame.

[0012] In one embodiment, the terminal further includes:

[0013] A flexible board, connecting the controller and the ultrasonic fingerprint sensor and connecting the pressure sensor and the controller.

[0014] In one embodiment, the outer wall of the middle frame is provided with engraved lines, and the engraved lines are used to indicate the area where the ultrasonic fingerprint sensor acquires the electrical signal of the fingerprint information.

[0015] In one embodiment, the ultrasonic fingerprint sensor includes a thin-film fingerprint sensor, a groove is provided on the inner wall of the middle frame, and the thin-film fingerprint sensor is arranged in the groove;

[0016] In one embodiment, the pressure sensor includes a thin-film pressure sensor, a groove is provided on the inner wall of the middle frame, and the thin-film fingerprint sensor and the thin-film pressure sensor are arranged in the groove; the size of the thin-film pressure sensor is the same as that of the thin-film fingerprint sensor.

[0017] According to the second aspect of the embodiments of the present disclosure, a fingerprint recognition method is provided, which is applied to the above terminal, and the method includes:

[0018] Collect a fingerprint image of the hand, where the fingerprint image includes at least one of the fingerprint images corresponding to the fingerprints of each finger and the palm print image corresponding to the palm print;

[0019] Compare each image in the fingerprint image with each sample image in the pre-stored image library, and each sample image in the pre-stored image library includes at least one of the fingerprint images corresponding to the fingerprints of each legal user's finger and the palm print image corresponding to the palm print;

[0020] When a sample image with a similarity exceeding a preset similarity threshold with each image in the fingerprint image is compared, determine the combination of the hand parts corresponding to each image in the fingerprint image according to the hand parts corresponding to each pre-stored sample image;

[0021] According to the corresponding relationship between the combination of each pre-stored hand part and the control instruction, execute the control instruction corresponding to the combination of the hand parts corresponding to each image in the fingerprint image.

[0022] In one embodiment, when the terminal includes a pressure sensor, the collecting of the fingerprint image of the hand includes:

[0023] Detect the pressure of the user's hand on the side wall where the corresponding ultrasonic fingerprint sensor is located through the pressure sensor;

[0024] When the pressure exceeds a preset pressure threshold, collect the electrical signal of the fingerprint information of the hand through the ultrasonic fingerprint sensor;

[0025] Convert the electro-signal of the handprint information into a handprint image.

[0026] According to the third aspect of the embodiments of the present disclosure, a handprint recognition device is provided, which is applied to a terminal provided with the above-mentioned handprint module. The device includes:

[0027] An acquisition module, configured to acquire a handprint image of a hand, where the handprint image includes at least one of fingerprint images corresponding to fingerprints of each finger and palmprint images corresponding to palmprints of the palm;

[0028] A comparison module, configured to compare each image in the handprint image with each sample image in a pre-stored image library, where each sample image in the pre-stored image library includes at least one of handprint images corresponding to fingerprints of each finger of a legitimate user and palmprint images corresponding to palmprints of the palm;

[0029] A determination module, configured to, when a sample image whose similarity to each image in the handprint image exceeds a preset similarity threshold is compared, determine a combination of hand parts corresponding to each image in the handprint image according to the hand parts corresponding to each pre-stored sample image;

[0030] An execution module, configured to execute a control instruction corresponding to the combination of hand parts corresponding to each image in the handprint image according to the corresponding relationship between the combination of each pre-stored hand part and the control instruction.

[0031] In one embodiment, when the terminal includes a pressure sensor, the acquisition module includes:

[0032] A detection sub-module, configured to detect the pressure of the user's hand on the side wall where the corresponding ultrasonic handprint sensor is located through the pressure sensor;

[0033] An acquisition sub-module, configured to, when the pressure exceeds a preset pressure threshold, acquire an electro-signal of handprint information of the hand through the ultrasonic fingerprint sensor;

[0034] A conversion sub-module, configured to convert the electro-signal of the handprint information into a handprint image.

[0035] According to the fourth aspect of the embodiments of the present disclosure, a handprint recognition device is provided, which is applied to the above-mentioned terminal. The device includes:

[0036] A processor;

[0037] A memory for storing instructions executable by the processor;

[0038] Wherein, the processor is configured to execute the steps in the above method.

[0039] According to a fifth aspect of the embodiments of the present disclosure, there is provided a computer-readable storage medium storing computer instructions, which when executed by a processor, implement the steps in the above method.

[0040] The technical solutions provided by the embodiments of the present disclosure may include the following beneficial effects: This embodiment provides a terminal, which includes a housing. The housing includes a front housing, a rear housing, and a middle frame located between the front housing and the rear housing. At least one ultrasonic fingerprint sensor is located on the inner wall of the middle frame. The ultrasonic fingerprint sensor is configured to emit ultrasonic waves that can penetrate the middle frame and receive the ultrasonic waves reflected by the user's hand, and generate an electric signal of fingerprint information according to the reflected ultrasonic waves. A controller is located inside the housing and is electrically connected to the at least one ultrasonic fingerprint sensor. The controller is configured to control the ultrasonic fingerprint sensor and convert the electric signal of fingerprint information collected by the ultrasonic fingerprint sensor into a fingerprint image. Since this terminal collects fingerprints through ultrasonic waves, there is no need to open holes on the terminal to expose the fingerprint collection area. In this way, the fingerprint collection module is completely hidden inside the housing, enhancing the integrity of the terminal's appearance design and the overall aesthetics of the machine, and reducing the number of holes, thereby reducing the processing and manufacturing difficulty and cost of the housing.

[0041] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The accompanying drawings herein are incorporated into the specification and constitute a part of this specification, showing embodiments consistent with the present disclosure, and are used together with the specification to explain the principles of the present disclosure.

[0043] Figure 1 is a schematic structural diagram of a terminal shown according to an exemplary embodiment.

[0044] Figure 2 is a schematic structural diagram of a terminal shown according to an exemplary embodiment.

[0045] Figure 3 is a schematic structural diagram of a terminal shown according to an exemplary embodiment.

[0046] Figure 4 is a schematic structural diagram of a terminal shown according to an exemplary embodiment.

[0047] Figure 5 is a schematic flowchart of a fingerprint recognition method shown according to an exemplary embodiment.

[0048] Figure 6 is a block diagram of a fingerprint recognition device shown according to an exemplary embodiment.

[0049] Figure 7 is a block diagram of a fingerprint recognition device shown according to an exemplary embodiment.

[0050] Figure 8 is a block diagram of a fingerprint recognition device shown according to an exemplary embodiment. Detailed implementation manners

[0051] Here, the exemplary embodiments will be described in detail, and examples thereof are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation manners described in the following exemplary embodiments do not represent all implementation manners consistent with the present disclosure. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0052] Currently, a fingerprint module for fingerprint recognition is usually disposed in the bottom area of the front shell of a terminal, and an opening needs to be made in this bottom area to expose the fingerprint acquisition area of the fingerprint module for a user to input a fingerprint in the fingerprint acquisition area. This opening is usually relatively large, increasing the processing and manufacturing difficulty of the housing, increasing the processing and manufacturing cost, and exposing the fingerprint acquisition area, which is not aesthetically pleasing.

[0053] This embodiment provides a terminal to solve the above problems. The terminal includes a housing, the housing includes a front shell, a rear shell, and a middle frame located between the front shell and the rear shell. At least one ultrasonic fingerprint sensor is located on the inner wall of the middle frame. The ultrasonic fingerprint sensor is configured to emit ultrasonic waves that can penetrate the middle frame and receive ultrasonic waves reflected by a user's hand, and generate a fingerprint information electrical signal according to the reflected ultrasonic waves. A controller is located in the housing and is electrically connected to the at least one ultrasonic fingerprint sensor. The controller is configured to control the ultrasonic fingerprint sensor and convert the fingerprint information electrical signal collected by the ultrasonic fingerprint sensor into a fingerprint image. Since the terminal acquires fingerprints through ultrasonic waves, there is no need to make an opening on the terminal to expose the fingerprint acquisition area, so that the fingerprint acquisition module is completely hidden in the housing, enhancing the integrity of the terminal's appearance design and the overall aesthetics of the whole machine, and reducing the opening, thereby reducing the processing and manufacturing difficulty and cost of the housing.

[0054] Figure 1 is a schematic structural diagram of a terminal shown according to an exemplary embodiment, as Figure 1As shown, the terminal 1 includes a housing, which includes a front shell, a rear shell (not shown in the figure), and a middle frame 11 located between the front shell and the rear shell. For example, taking the terminal as a mobile phone, the front shell is a protective shell located on the display module of the terminal, the rear shell is the battery back cover of the terminal, and the middle frame is a rectangular frame surrounded by the four side walls of the terminal, connecting the edges of the front shell and the rear shell, and together with the front shell and the rear shell, forming the housing of the terminal.

[0055] Here, as Figure 1 shown, the terminal 1 further includes at least one ultrasonic fingerprint sensor 12. The ultrasonic fingerprint sensor 12 can be located on the inner wall of the middle frame 11. Here, the inner wall refers to the side of the middle frame 11 facing the inside of the terminal. The middle frame on the terminal usually includes four surrounding frame bars, such as a top frame bar at the top of the terminal, a bottom frame bar at the bottom of the terminal, a left frame bar and a right frame bar on the left and right sides of the terminal. For example, as Figure 1 shown, the terminal includes an ultrasonic fingerprint sensor 12, and the ultrasonic fingerprint sensor 12 is located on the inner wall of the left frame bar 111 of the middle frame 11. Or, for example, Figure 2 is a schematic structural diagram of a terminal shown according to an exemplary embodiment. As Figure 2 shown, the terminal includes two ultrasonic fingerprint sensors 12. One ultrasonic fingerprint sensor 12 is located on the inner wall of the left frame bar 111 of the middle frame 11, and the other ultrasonic fingerprint sensor 12 is located on the inner wall of the right frame bar 112 of the middle frame 11. Of course, the ultrasonic fingerprint sensor can also be set on other frame bars of the middle frame 11, as long as there is free space on the middle frame, the ultrasonic fingerprint sensor can be set there, and no limitation is made here; here, the free space of the middle frame 11 refers to the area on the middle frame except for the areas where keys and various holes such as microphone holes, USB interface holes, etc. are set.

[0056] Here, the terminal 1 further includes a controller (not shown in the figure). The controller is located inside the housing of the terminal and is electrically connected to the at least one ultrasonic fingerprint sensor 101. The controller is used to control the ultrasonic fingerprint sensor. For example, when it is necessary to obtain a user's fingerprint image to identify the user, such as unlocking, etc., it can control the ultrasonic fingerprint sensor to emit ultrasonic waves to obtain an electrical signal of fingerprint information, etc. The controller can convert the electrical signal of fingerprint information collected by the ultrasonic fingerprint sensor into a fingerprint image, so as to identify the user according to the fingerprint image subsequently or execute different instructions according to different fingerprint images.

[0057] In this embodiment, the fingerprint image can be obtained by ultrasonic waves, so there is no need to open a hole on the terminal to expose the fingerprint collection area. In this way, the module for collecting fingerprints can be completely hidden inside the housing, enhancing the integrity of the terminal's appearance design and the overall aesthetics of the whole machine, and reducing the number of holes, thus reducing the processing and manufacturing difficulty and cost of the housing.

[0058] In a possible implementation, Figure 3 is a schematic structural diagram of a terminal shown according to an exemplary embodiment, as Figure 3 shown, the above terminal may further include at least one pressure sensor 13, as Figure 3 shown, the pressure sensor 13 corresponds one-to-one with the ultrasonic fingerprint sensor 12, is located between the corresponding ultrasonic fingerprint sensor 12 and the middle frame 11, is electrically connected to the controller, and the pressure sensor 13 is used to detect the pressure of the user's hand on the side wall where the corresponding ultrasonic fingerprint sensor 12 is located; thus, when the pressure detected by the pressure sensor 13 exceeds a preset pressure threshold, the controller can control the ultrasonic fingerprint sensor 12 corresponding to the pressure sensor 13 to obtain a fingerprint information electrical signal. Thus, when the user wants to input fingerprint information to unlock, the user can press the side wall where the ultrasonic fingerprint sensor 12 is located with greater force, and the controller will control the ultrasonic fingerprint sensor 12 to emit ultrasonic waves to obtain a fingerprint information electrical signal, which can prevent the user from accidentally touching and avoid emitting ultrasonic waves to obtain a fingerprint information electrical signal when it is not necessary to obtain a fingerprint information electrical signal.

[0059] For example, as Figure 3 shown, if the pressure sensor 13 on one side of the left frame bar 111 of the middle frame 11 detects that the pressure exceeds a preset pressure threshold, the controller will control the ultrasonic sensor 12 on one side of the left frame bar 111 of the middle frame 11 to emit ultrasonic waves to obtain a fingerprint information electrical signal.

[0060] This embodiment can detect the pressure of the user's hand on the side wall where the corresponding ultrasonic fingerprint sensor is located through the pressure sensor, and when the pressure detected by the pressure sensor exceeds a preset pressure threshold, control the ultrasonic fingerprint sensor corresponding to the pressure sensor to obtain a fingerprint information electrical signal, preventing the user from accidentally touching.

[0061] In a possible embodiment, as Figure 2 or Figure 3 shown, the above terminal may include two ultrasonic fingerprint sensors 12; the two ultrasonic fingerprint sensors 12 are respectively located on two opposite inner walls of the middle frame 11.

[0062] For example, as Figure 3As shown, when the two ultrasonic fingerprint sensors 12 are respectively located on two opposite inner walls of the middle frame 11, in the state where the user holds the terminal, the thumb and part of the palm will be on one side, and the other four fingers will be on the other side. In this way, when the controller needs to obtain a fingerprint image, it can directly control the ultrasonic fingerprint sensor to emit ultrasonic waves to obtain the fingerprint information electrical signal, and the user can input the fingerprint information in the state of holding the terminal, which is convenient for the user to use the holding type terminal.

[0063] This embodiment may include two ultrasonic fingerprint sensors, and the two ultrasonic fingerprint sensors are respectively located on two opposite inner walls of the middle frame. In this way, the user can input fingerprint information when holding the terminal, greatly improving the user experience.

[0064] In a possible embodiment, Figure 4 is a schematic cross-sectional structure diagram of a terminal shown according to an exemplary embodiment. As Figure 4 shown, the terminal further includes a flexible board 14, and the flexible board 14 connects the controller and the ultrasonic fingerprint sensor, and connects the pressure sensor and the controller.

[0065] Here, the ultrasonic fingerprint sensor and the controller are connected by the flexible board, and the pressure sensor and the controller are also connected by the flexible board. Since the flexible board can be freely bent, wound, folded, etc., the flexible board can be arranged arbitrarily according to the space layout requirements inside the terminal, making the control design inside the terminal more convenient.

[0066] In a possible embodiment, the outer wall of the middle frame is provided with engraved lines, and the engraved lines are used to indicate the area where the ultrasonic fingerprint sensor obtains the fingerprint information electrical signal.

[0067] Here, the area where the ultrasonic fingerprint sensor obtains the fingerprint information electrical signal is on the outer wall area on the other side of the inner wall covered by the ultrasonic fingerprint sensor. For example, various engraved lines can be set in this area, and when the user's hand touches the engraved lines, they will know that this area is the area for inputting fingerprint information; or, engraved lines can be set at the boundary of this area, and after the user's hand touches the engraved lines, they will know that the area inside the engraved lines is the area for inputting fingerprint information.

[0068] This embodiment can set engraved lines on the outer wall of the middle frame to indicate the area where the ultrasonic fingerprint sensor obtains the fingerprint information electrical signal, facilitating the user to input fingerprint information at the correct position.

[0069] In a possible implementation manner, as Figure 4As shown, the ultrasonic fingerprint sensor 12 includes a thin-film fingerprint sensor. A groove 110 is provided on the inner wall of the middle frame 11, and the thin-film fingerprint sensor is disposed in the groove 110. In this way, the occupied space of components in the terminal can be expanded.

[0070] It should be noted here that the width of the thin-film fingerprint sensor is less than or equal to the width of the inner wall of the middle frame where it is located. The length of the thin-film fingerprint sensor should not be too long to avoid increasing costs, nor too short to avoid difficulty in collecting fingerprints. For example, the length of the thin-film fingerprint sensor can be greater than or equal to 15 millimeters and less than or equal to 120 millimeters.

[0071] In a possible implementation, as Figure 4 shown, the pressure sensor 13 includes a thin-film pressure sensor. A groove 110 is provided on the inner wall of the middle frame 11, and the thin-film fingerprint sensor and the thin-film pressure sensor are disposed in the groove 110. In this way, the occupied space of components in the terminal can be expanded.

[0072] Here, the size of the thin-film pressure sensor is the same as that of the thin-film fingerprint sensor, and the two completely overlap in the terminal, which is convenient for the terminal to directly control the ultrasonic fingerprint sensor to collect the fingerprint information of the hand with a left pressing operation when the pressure detected by the pressure sensor exceeds the preset pressure threshold.

[0073] This embodiment also provides a fingerprint recognition method. Figure 5 is a schematic flowchart of a fingerprint recognition method shown according to an exemplary embodiment. This fingerprint recognition method is applied to any of the above terminals, as Figure 5 shown, this fingerprint recognition method may include the following steps 501 to 504.

[0074] In step 501, a fingerprint image of the hand is collected, and the fingerprint image includes at least one of the fingerprint images corresponding to the fingerprints of each finger and the palm print image corresponding to the palm print.

[0075] Here, when the terminal needs to collect fingerprint information, it can control the ultrasonic fingerprint sensor to emit ultrasonic waves that can penetrate the middle frame and receive the ultrasonic waves reflected by the user's hand, and generate an electrical signal of fingerprint information according to the reflected ultrasonic waves; then the controller converts the electrical signal of fingerprint information collected by the ultrasonic fingerprint sensor into a fingerprint image. At this time, the fingerprint image obtained by the terminal may include at least one of the fingerprint images corresponding to the fingerprints of each finger and the palm print image corresponding to the palm print. For example, as Figure 3 shown, when the user holds the terminal with one hand, the terminal can collect the fingerprint images of five fingers and the palm print image of part of the palm.

[0076] In step 502, each image in the fingerprint image is compared with each sample image in the pre-stored image library, where each sample image in the pre-stored image library includes at least one of the fingerprint images corresponding to each finger of a legitimate user and the palm print images corresponding to the palm prints.

[0077] Here, the terminal can pre-collect at least one of the fingerprint images corresponding to each finger of a legitimate user and the palm print images corresponding to the palm prints, and store these images as sample images in the image library. In this way, after the terminal collects the fingerprint image of the current user of the terminal, it can compare each image in the fingerprint image with each pre-stored sample image, calculate the similarity between each image in the fingerprint image and each sample image, and when the similarity between two images exceeds the preset similarity threshold, it is determined that these two images are the same. If each image in the fingerprint image has the same image in the sample images, it is considered that the fingerprint image is the fingerprint image of a legitimate user. If there is one image that has no same image in the sample images, it is considered that the fingerprint image is not the fingerprint image of a legitimate user.

[0078] In step 503, when a sample image whose similarity with each image in the fingerprint image exceeds the preset similarity threshold is identified, the combination of the hand parts corresponding to each image in the fingerprint image is determined according to the hand parts corresponding to each pre-stored sample image.

[0079] Here, when a sample image whose similarity with each image in the fingerprint image exceeds the preset similarity threshold is identified, it indicates that each image in the fingerprint image has the same image in the sample images, and it is considered that the fingerprint image is the fingerprint image of a legitimate user. At this time, the terminal can determine that the hand parts corresponding to each image in the fingerprint image are the hand parts corresponding to the sample images that are the same as each image according to the hand parts corresponding to each pre-stored sample image, so as to determine the combination of the hand parts corresponding to each image in the fingerprint image.

[0080] In step 504, according to the corresponding relationship between the combination of each pre-stored hand part and the control instruction, the control instruction corresponding to the combination of the hand parts corresponding to each image in the fingerprint image is executed.

[0081] Here, the terminal can pre-store the corresponding relationship between the combination of each hand part set by the user or default by the terminal and the control instruction. In this way, after the terminal determines the combination of the hand parts corresponding to each image in the fingerprint image, it can directly execute the control instruction corresponding to the combination of the hand parts corresponding to each image in the fingerprint image based on this.

[0082] Exemplarily, control instructions corresponding to the right thumb can be pre-stored in the terminal for unlocking the terminal, the control instruction corresponding to the combination of the right thumb and index finger is the instruction for unlocking the terminal to take a picture, and the control instruction corresponding to the five fingers of the right hand and part of the palm is to unlock Application A; the control instruction corresponding to the left thumb is the recording instruction, etc. In this way, when the user needs to unlock the terminal, the user can press the right thumb on the fingerprint acquisition area. After the terminal acquires the fingerprint image of the user's right thumb, it can be compared that the fingerprint image is similar to the sample image of the right thumb of the legitimate user, and it is determined that the hand part corresponding to the user's fingerprint image is the right thumb. In this way, the terminal unlocking instruction can be executed to unlock the terminal.

[0083] In a possible embodiment, when the terminal includes a pressure sensor, step 501 in the above handprint recognition method can be implemented as the following steps A1 to A3.

[0084] In step A1, the pressure sensor is used to detect the pressure of the user's hand on the side wall where the corresponding ultrasonic handprint sensor is located.

[0085] In step A2, when the pressure exceeds a preset pressure threshold, the ultrasonic fingerprint sensor is used to collect the electrical signal of the handprint information of the hand.

[0086] In step A3, the electrical signal of the handprint information is converted into a handprint image.

[0087] Here, to prevent the user from accidentally touching, as Figure 3 shown, at least one pressure sensor 13 can also be provided on the terminal 1. The pressure sensor 13 corresponds to the ultrasonic handprint sensor 12 one by one, is located between the corresponding ultrasonic handprint sensor 12 and the middle frame 11, and is electrically connected to the controller. The pressure sensor 13 is used to detect the pressure of the user's hand on the side wall where the corresponding ultrasonic handprint sensor 12 is located; in this way, when the pressure detected by the pressure sensor 13 exceeds the preset pressure threshold, the controller can control the ultrasonic handprint sensor 12 corresponding to the pressure sensor 13 to obtain the electrical signal of the handprint information. In this way, when the user wants to input the handprint information to unlock, the user can press the side wall where the ultrasonic handprint sensor 12 is located with greater force, and the controller will control the ultrasonic handprint sensor 12 to emit ultrasonic waves to obtain the electrical signal of the handprint information, which can prevent the user from accidentally touching and avoid emitting ultrasonic waves to obtain the electrical signal of the handprint information when it is not necessary to obtain the electrical signal of the handprint information.

[0088] This embodiment can detect the pressure of the user's hand on the side wall where the corresponding ultrasonic handprint sensor is located through the pressure sensor, and when the pressure detected by the pressure sensor exceeds the preset pressure threshold, control the ultrasonic handprint sensor corresponding to the pressure sensor to obtain the electrical signal of the handprint information, preventing the user from accidentally touching.

[0089] The following are embodiments of the disclosed device, which can be used to implement the method embodiments of the present disclosure.

[0090] Figure 6 It is a block diagram of a fingerprint recognition device shown according to an exemplary embodiment. This device can be implemented as part or all of an electronic device through software, hardware, or a combination of both. As Figure 6 shown, the fingerprint recognition device includes:

[0091] An acquisition module 601, configured to acquire a fingerprint image of a hand, where the fingerprint image includes at least one of a fingerprint image corresponding to each finger fingerprint and a palmprint image corresponding to a palmprint of the hand;

[0092] A comparison module 602, configured to compare each image in the fingerprint image with each sample image in a pre-stored image library, where each sample image in the pre-stored image library includes at least one of a fingerprint image corresponding to each finger fingerprint of a legitimate user and a palmprint image corresponding to a palmprint of the hand;

[0093] A determination module 603, configured to, when a sample image with a similarity exceeding a preset similarity threshold with each image in the fingerprint image is compared, determine a combination of the hand parts corresponding to each image in the fingerprint image according to the hand parts corresponding to each pre-stored sample image;

[0094] An execution module 604, configured to execute a control instruction corresponding to the combination of the hand parts corresponding to each image in the fingerprint image according to the corresponding relationship between the combination of each pre-stored hand part and the control instruction.

[0095] As a possible embodiment, Figure 7 It is a block diagram of a fingerprint recognition device shown according to an exemplary embodiment. As Figure 7 shown, the above-disclosed fingerprint recognition device can also configure the acquisition module 601 to include a detection sub-module 6011, an acquisition sub-module 6012, and a conversion sub-module 6013, where:

[0096] The detection sub-module 6011 is configured to detect the pressure of the user's hand on the side wall where the corresponding ultrasonic fingerprint sensor is located through a pressure sensor;

[0097] The acquisition sub-module 6012 is configured to, when the pressure exceeds a preset pressure threshold, acquire an electrical signal of fingerprint information of the hand through an ultrasonic fingerprint sensor;

[0098] The conversion sub-module 6013 is configured to convert the electrical signal of the fingerprint information into a fingerprint image.

[0099] Regarding the device in the above embodiments, the specific manner in which each module performs operations has been described in detail in the embodiments related to the method, and will not be elaborated here.

[0100] Figure 8 FIG. is a block diagram of a device for a terminal according to an exemplary embodiment, and the device is applicable to terminal devices. For example, the device 800 may be a mobile phone, a game console, a computer, a tablet device, a personal digital assistant, etc.

[0101] The device 800 may include one or more of the following components: a processing component 801, a memory 802, a power supply component 803, a multimedia component 804, an audio component 805, an input / output (I / O) interface 806, a sensor component 807, and a communication component 808.

[0102] The processing component 801 generally controls the overall operation of the device 800, such as operations associated with display, telephone calls, data communication, camera operations, and recording operations. The processing component 801 may include one or more processors 820 to execute instructions to complete all or part of the steps of the above method. In addition, the processing component 801 may include one or more modules to facilitate the interaction between the processing component 801 and other components. For example, the processing component 801 may include a multimedia module to facilitate the interaction between the multimedia component 804 and the processing component 801.

[0103] The memory 802 is configured to store various types of data to support the operation of the device 800. Examples of these data include instructions for any application or method operating on the device 800, contact data, phone book data, messages, pictures, videos, etc. The memory 802 may be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, a magnetic disk, or an optical disk.

[0104] The power supply component 803 provides power to various components of the device 800. The power supply component 803 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power for the device 800.

[0105] The multimedia component 804 includes a screen that provides an output interface between the device 800 and the user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen can be implemented as a touch screen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touches, swipes, and gestures on the touch panel. The touch sensors can sense not only the boundaries of a touch or swipe action, but also detect the duration and pressure associated with the touch or swipe operation. In some embodiments, the multimedia component 804 includes a front camera and / or a rear camera. When the device 800 is in an operating mode, such as a shooting mode or a video mode, the front camera and / or the rear camera can receive external multimedia data. Each of the front camera and the rear camera can be a fixed optical lens system or have a focal length and optical zoom capabilities.

[0106] The audio component 805 is configured to output and / or input audio signals. For example, the audio component 805 includes a microphone (MIC) that is configured to receive external audio signals when the device 800 is in an operating mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signals can be further stored in the memory 802 or transmitted via the communication component 808. In some embodiments, the audio component 805 further includes a speaker for outputting audio signals.

[0107] The I / O interface 806 provides an interface between the processing component 801 and a peripheral interface module, and the peripheral interface module can be a keyboard, a click wheel, buttons, etc. These buttons can include, but are not limited to: a home button, a volume button, a power button, and a lock button.

[0108] The sensor component 807 includes one or more sensors for providing status assessments of various aspects of the device 800. For example, the sensor component 807 can detect the on / off state of the device 800, the relative positioning of components, such as the display and keypad of the device 800. The sensor component 807 can also detect a change in the position of the device 800 or a component of the device 800, the presence or absence of user contact with the device 800, the orientation or acceleration / deceleration of the device 800, and the temperature change of the device 800. The sensor component 807 can include a proximity sensor configured to detect the presence of nearby objects without any physical contact. The sensor component 807 can also include an ultrasonic fingerprint sensor, a pressure sensor, a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor component 807 can further include an acceleration sensor, a gyroscope sensor, a magnetic sensor, or a temperature sensor.

[0109] The communication component 808 is configured to facilitate communication, either wired or wirelessly, between the device 800 and other devices. The device 800 can access a wireless network based on communication standards, such as WiFi, 2G, or 3G, or a combination thereof. In an exemplary embodiment, the communication component 808 receives a broadcast signal or broadcast-related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 808 further includes a Near Field Communication (NFC) module to facilitate short-range communication. For example, the NFC module can be implemented based on Radio Frequency Identification (RFID) technology, Infrared Data Association (IrDA) technology, Ultra Wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.

[0110] In an exemplary embodiment, the device 800 can be implemented by one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components for performing the above method.

[0111] In an exemplary embodiment, a non-transitory computer-readable storage medium including instructions is also provided, such as a memory 802 including instructions, which can be executed by the processor 820 of the device 800 to complete the above method. For example, the non-transitory computer-readable storage medium can be a ROM, Random Access Memory (RAM), CD-ROM, magnetic tape, floppy disk, and optical data storage device, etc.

[0112] A non-transitory computer-readable storage medium, when the instructions in the storage medium are executed by the processor of the device 800, enables the device 800 to execute the above fingerprint recognition method, and the method includes:

[0113] Collecting a fingerprint image of a hand, where the fingerprint image includes at least one of the fingerprint images corresponding to the fingerprints of each finger and the palm print image corresponding to the palm print of the hand;

[0114] Comparing each image in the fingerprint image with each sample image in a pre-stored image library, where each sample image in the pre-stored image library includes at least one of the fingerprint images corresponding to the fingerprints of each finger of a legitimate user and the palm print image corresponding to the palm print of the hand;

[0115] When a sample image with a similarity exceeding a preset similarity threshold is found in comparison with each image in the fingerprint image, determining the combination of the hand parts corresponding to each image in the fingerprint image according to the hand parts corresponding to each pre-stored sample image;

[0116] Execute the control instructions corresponding to the combination of hand parts corresponding to each image in the fingerprint image according to the corresponding relationship between the pre-stored combinations of hand parts and the control instructions.

[0117] In one embodiment, when the terminal includes a pressure sensor, the acquisition of the fingerprint image of the hand includes:

[0118] Detect the pressure of the user's hand on the side wall where the corresponding ultrasonic fingerprint sensor is located through the pressure sensor;

[0119] When the pressure exceeds the preset pressure threshold, collect the electrical signal of the fingerprint information of the hand through the ultrasonic fingerprint sensor;

[0120] Convert the electrical signal of the fingerprint information into a fingerprint image.

[0121] This embodiment also provides a fingerprint recognition device, including:

[0122] A processor;

[0123] A memory for storing instructions executable by the processor;

[0124] Wherein, the processor is configured to:

[0125] Collect the fingerprint image of the hand, and the fingerprint image includes at least one image of the fingerprint image corresponding to each finger fingerprint and the palm print image corresponding to the palm print;

[0126] Compare each image in the fingerprint image with each sample image in the pre-stored image library, and each sample image in the pre-stored image library includes at least one image of the fingerprint image corresponding to each finger fingerprint of a legitimate user and the palm print image corresponding to the palm print;

[0127] When a sample image with a similarity exceeding the preset similarity threshold is compared with each image in the fingerprint image, determine the combination of hand parts corresponding to each image in the fingerprint image according to the pre-stored hand parts corresponding to each sample image;

[0128] Execute the control instructions corresponding to the combination of hand parts corresponding to each image in the fingerprint image according to the corresponding relationship between the pre-stored combinations of hand parts and the control instructions.

[0129] In one embodiment, the above processor can also be configured to:

[0130] When the terminal includes a pressure sensor, the acquisition of the fingerprint image of the hand includes:

[0131] Detect the pressure of the user's hand on the side wall where the corresponding ultrasonic fingerprint sensor is located through the pressure sensor;

[0132] When the pressure exceeds a preset pressure threshold, an electrical signal of fingerprint information of a hand is collected by an ultrasonic fingerprint sensor;

[0133] Convert the electrical signal of the fingerprint information into a fingerprint image.

[0134] After considering the specification and practicing the disclosure herein, those skilled in the art will readily conceive of other embodiments of the present disclosure. This application is intended to cover any variations, uses, or adaptations of the present disclosure, which follow the general principles of the present disclosure and include known common general knowledge or conventional technical means in the technical field not disclosed in the present disclosure. The specification and examples are only illustrative, and the true scope and spirit of the present disclosure are pointed out by the following claims.

[0135] It should be understood that the present disclosure is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present disclosure is only limited by the appended claims.

Claims

1. A terminal, the terminal comprising a housing, the housing including a front shell, a rear shell, and a middle frame located between the front shell and the rear shell, characterized in that, the terminal further comprises: at least one ultrasonic fingerprint sensor, located on the inner wall of the middle frame and completely hidden inside the terminal housing, the ultrasonic fingerprint sensor being configured to emit ultrasonic waves capable of passing through the middle frame and receive ultrasonic waves reflected by a user's hand, and generate an electrical signal of fingerprint information based on the reflected ultrasonic waves; a controller, located inside the housing and electrically connected to the at least one ultrasonic fingerprint sensor, the controller being configured to control the ultrasonic fingerprint sensor and convert the electrical signal of fingerprint information collected by the ultrasonic fingerprint sensor into a fingerprint image; the ultrasonic fingerprint sensor includes a thin-film fingerprint sensor, a groove is provided on the inner wall of the middle frame, and the thin-film fingerprint sensor is disposed in the groove.

2. The terminal according to claim 1, characterized in that, the terminal further comprises: at least one pressure sensor, the pressure sensor corresponding to the ultrasonic fingerprint sensor one by one, located between the corresponding ultrasonic fingerprint sensor and the middle frame, electrically connected to the controller, the pressure sensor being configured to detect the pressure of the user's hand on the side wall where the corresponding ultrasonic fingerprint sensor is located; the controller is configured to, when the pressure detected by the pressure sensor exceeds a preset pressure threshold, control the ultrasonic fingerprint sensor corresponding to the pressure sensor to obtain an electrical signal of fingerprint information.

3. The terminal according to claim 1, characterized in that, the terminal includes: two ultrasonic fingerprint sensors; the two ultrasonic fingerprint sensors are respectively located on two opposite inner walls of the middle frame.

4. The terminal according to claim 2, characterized in that, the terminal further comprises: a flexible board, connecting the controller and the ultrasonic fingerprint sensor and connecting the pressure sensor and the controller.

5. The terminal according to claim 1, characterized in that, the outer wall of the middle frame is provided with a texture, and the texture is used to indicate the area where the ultrasonic fingerprint sensor obtains an electrical signal of fingerprint information.

6. The terminal according to claim 2, characterized in that, the pressure sensor includes a thin-film pressure sensor, a groove is provided on the inner wall of the middle frame, and the thin-film fingerprint sensor and the thin-film pressure sensor are disposed in the groove; the size of the thin-film pressure sensor is the same as the size of the thin-film fingerprint sensor.

7. A fingerprint recognition method, characterized in that, using the terminal according to any one of claims 1 to 6, the method comprising: collecting a fingerprint image of a hand, the fingerprint image including at least one of fingerprint images corresponding to fingerprints of each finger and a palmprint image corresponding to a palmprint of the hand; comparing each image in the fingerprint image with each sample image in a pre-stored image library, each sample image in the pre-stored image library including at least one of fingerprint images corresponding to fingerprints of each finger of a legitimate user and a palmprint image corresponding to a palmprint of the hand; When a sample image with a similarity exceeding a preset similarity threshold to each image in the fingerprint image is compared, determine the combination of the hand parts corresponding to each image in the fingerprint image according to the hand parts corresponding to each pre-stored sample image; Execute the control instruction corresponding to the combination of the hand parts corresponding to each image in the fingerprint image according to the corresponding relationship between the combination of each pre-stored hand part and the control instruction.

8. The method according to claim 7, wherein, when the terminal includes a pressure sensor, the acquisition of the fingerprint image of the hand includes: detect the pressure of the user's hand on the side wall where the corresponding ultrasonic fingerprint sensor is located through the pressure sensor; when the pressure exceeds a preset pressure threshold, collect the electrical signal of the fingerprint information of the hand through the ultrasonic fingerprint sensor; convert the electrical signal of the fingerprint information into a fingerprint image.

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