CN105446451B - Fingerprint identification device, mobile terminal and wake-up method of fingerprint identification device - Google Patents

Abstract

The invention discloses a fingerprint identification device, a mobile terminal and a wake-up method of the fingerprint identification device, wherein the fingerprint identification device comprises: the fingerprint identification device comprises a fingerprint identification chip, a plurality of detection subareas arranged on the fingerprint identification chip and a metal ring surrounding the fingerprint identification chip, wherein the fingerprint identification chip is used for detecting the number of covered detection subareas after detecting that the metal ring is touched for a first preset time, and if the number is larger than a preset threshold value, the fingerprint identification chip starts fingerprint identification scanning. The fingerprint identification device of the embodiment of the invention realizes two-stage awakening when the fingerprint identification scanning function is started, and avoids the fingerprint scanning function from being opened due to error touch, thereby greatly reducing the power consumption and improving the user experience.

Description

Fingerprint identification device, mobile terminal and wake-up method of fingerprint identification device

technical field

The present invention relates to the technical field of mobile terminals, in particular to a fingerprint identification device, a mobile terminal and a wake-up method for the fingerprint identification device.

Background technique

At present, fingerprint recognition technology has been successfully applied to mobile phones, and more and more mobile phone companies also regard fingerprint recognition as the standard configuration of mobile phones in the future. Biometric recognition is widely used in a new generation of electronic devices, based on the stability of fingerprints and uniqueness to ensure security. At present, the fingerprint identification device is applied to the mobile phone at the back of the mobile phone or on the home button of the mobile phone, and only needs to press the sensor when unlocking.

Nowadays, the development trend of mobile phones is large-screen, ultra-thin, and high-speed. However, the existing battery capacity cannot meet the high-performance requirements of mobile phones. Smart phones basically need to be charged every day, which makes it particularly important to control power consumption. A mobile phone with a fingerprint recognition device can be unlocked by pressing the chip during sleep. However, an accidental touch or an invalid touch will also switch the fingerprint chip to the normal scanning mode, resulting in an increase in the power consumption of the mobile phone and a poor user experience. .

SUMMARY OF THE INVENTION

The present invention aims to solve one of the technical problems in the related art at least to a certain extent. Therefore, an object of the present invention is to provide a fingerprint identification device, which realizes two-level wake-up when the fingerprint identification scanning function is activated, so as to avoid the fingerprint scanning function being opened due to a wrong touch, thereby greatly reducing the power consumption , which improves the user experience.

The second object of the present invention is to provide a mobile terminal.

The third object of the present invention is to provide a wake-up method for a fingerprint identification device.

In order to achieve the above purpose, the fingerprint identification device according to the embodiment of the first aspect of the present invention includes a fingerprint identification chip, a plurality of detection sub-regions arranged on the fingerprint identification chip, and a metal ring surrounding the fingerprint identification chip, wherein, The fingerprint identification chip is used to detect the number of covered detection sub-regions after detecting that the metal ring is touched for a first preset time, and if the number is greater than a preset threshold, the fingerprint identification chip Start fingerprint recognition scan.

According to the fingerprint identification device of the embodiment of the present invention, after detecting that the metal ring is touched for the first preset time, the fingerprint identification chip further detects the number of covered detection sub-areas, and if the number is greater than the preset threshold, the fingerprint identification The chip starts the fingerprint identification scanning, and the fingerprint identification device realizes two-level wake-up when the fingerprint identification scanning function is activated, which avoids turning on the fingerprint scanning function due to wrong touch, thus greatly reducing the power consumption and improving the user experience.

In order to achieve the above objective, the mobile terminal according to the embodiment of the second aspect of the present invention includes the fingerprint identification device according to the embodiment of the first aspect of the present invention.

According to the mobile terminal of the embodiment of the present invention, the fingerprint identification device realizes two-level wake-up when the fingerprint identification scanning function is activated, which avoids turning on the fingerprint scanning function due to false touches, thereby greatly reducing the power consumption of the mobile terminal and improving the user experience. experience.

In order to achieve the above object, a method for waking up a fingerprint identification device according to a third aspect of the present invention, the fingerprint identification device includes a fingerprint identification chip, a plurality of detection sub-regions disposed on the fingerprint identification chip, and a plurality of detection sub-regions arranged on the fingerprint identification chip and surrounding the fingerprint Identifying a metal ring of a chip, the method includes the following steps: the fingerprint identification chip detects the metal ring; when it is detected that the metal ring is touched for a first preset time, the fingerprint identification chip further Detecting the plurality of detection sub-regions; when it is detected that the number of covered detection sub-regions is greater than a preset threshold, the fingerprint identification chip starts fingerprint identification scanning.

According to the wake-up method of a fingerprint identification device according to the embodiment of the present invention, after detecting that the metal ring is touched for a first preset time, the fingerprint identification chip further detects the number of covered detection sub-regions, and if the number is greater than the preset threshold, Then, the fingerprint identification chip starts the fingerprint identification scanning, and this method avoids turning on the fingerprint scanning function due to a wrong touch, thereby greatly reducing power consumption and improving user experience.

Description of drawings

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

2 is a schematic diagram of a fingerprint identification device applied to a mobile terminal according to an embodiment of the present invention;

3 is a schematic diagram of a division manner of detection sub-regions according to an embodiment of the present invention;

FIG. 4 is a flowchart of a wake-up method of a fingerprint identification device according to an embodiment of the present invention.

Detailed ways

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

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

FIG. 1 is a schematic structural diagram of a fingerprint identification device according to an embodiment of the present invention. As shown in FIG. 1 , a fingerprint identification device 10 according to an embodiment of the present invention includes a fingerprint identification chip 100 , a plurality of detection sub-regions 200 and a metal ring 300 .

The plurality of detection sub-regions 200 are disposed on the fingerprint identification chip 100 , and the metal ring 300 surrounds the fingerprint identification chip 100 . The fingerprint identification chip 100 is used to detect the number of the covered detection sub-regions 200 after detecting that the metal ring 300 is touched for a first preset time. If the number is greater than the preset threshold, the fingerprint identification chip 100 starts the fingerprint identification scan .

Specifically, the metal ring 300 is connected to the emission pins inside the fingerprint identification chip 100 , and is used not only as a signal emitter, but also for CSD detection (ie, capacitance detection). The plurality of detection sub-regions are the surface of the fingerprint identification chip 100 . The artificially set area on the array can be used as the basis for judging the coverage area of the finger.

More specifically, when the fingerprint identification chip 100 detects that the metal ring 300 is touched for a first preset time, the Sub_area (representing the detection sub-area) detection will be triggered, and the Sub_area detection will be triggered, and the area pressed by the finger will be determined. Whether the collection threshold is reached, that is, whether the number of the covered detection sub-areas 200 detected by the fingerprint identification chip 100 is greater than the preset threshold, if so, the fingerprint identification scanning function of the fingerprint identification chip 100 will be awakened, that is, the fingerprint identification chip 100 will perform the entire detection process. Fingerprint scanning of the area, and then follow-up work such as fingerprint matching. In addition, if the number of covered detection sub-regions 200 is not greater than the preset threshold, indicating that it is not a valid finger touch, then the fingerprint identification chip 100 continues to detect the metal ring 300 until there is no finger touch.

As shown in FIG. 2 , the fingerprint identification device 10 according to the embodiment of the present invention is applied to a mobile terminal, where the fingerprint identification device 10 may be arranged on the front or the back of the mobile terminal.

In a specific embodiment of the present invention, we choose the detection array of the fingerprint identification chip 100 to be 160*80, and the number of detection sub-regions 200 to be 16. The arrangement sequence is shown in FIG. 3 . The size is 8*8 pixels. The metal ring 300 is scanned every 10 ms, and the preset threshold for the number of detection sub-areas covered by the full-area scan is 10.

For example, if the fingerprint identification chip 100 detects that the metal ring 300 is touched four times in a row, it means that a finger or a conductor is touching the fingerprint identification device 10 at this time, then the fingerprint identification chip 100 needs to further determine whether it is a valid finger or not. touch, then trigger the detection sub-area to scan to determine whether there is a real finger press, that is, to determine whether the pressed area meets the requirements, if the number of covered detection sub-areas 200 reaches the preset threshold, that is, there are 10 detection sub-areas If 200 is covered by a finger, it is considered that the pressing area of the finger has reached the finger scanning threshold. At this time, the fingerprint identification chip 100 will notify the mobile terminal to issue an interruption to scan the whole area, that is, the fingerprint identification chip 100 will start the fingerprint identification scanning, and then perform matching. If the matching is successful Then the mobile terminal is unlocked and the screen is lit, and the mobile terminal wakes up successfully; if multiple matches are unsuccessful, the mobile terminal will also light up the screen and prompt that the number of failures is too many, please wait or use other unlocking methods such as password unlocking.

In an embodiment of the present invention, the plurality of detection sub-regions 200 are divided into N rows, where N is a positive integer.

In an embodiment of the present invention, each row of detection sub-regions 200 includes M detection sub-regions 200, wherein every two adjacent detection sub-regions 200 in the first to i-th detection sub-regions 200 have a first detection sub-region between them. interval, there is a second interval between every two adjacent detection sub-areas in the i-th to j-th detection sub-areas 200, and between every two adjacent detection sub-areas in the j-th to M-th detection sub-areas 200 There is a third interval between them, where i is a positive integer less than j, and j is a positive integer less than M.

In one embodiment of the present invention, the first interval and the third interval are equal, and the second interval is greater than the first interval.

Specifically, when each row includes M detection sub-regions, that is, the number of columns of detection sub-regions is M, then in each row of detection sub-regions, the interval between each adjacent two detection sub-regions (the first interval, The second interval and the third interval) can be set as multiples of M according to actual conditions. For example, in a specific embodiment, when the fingerprint identification chip 100 is relatively wide, the second interval can be set to be twice the first interval.

Of course, in other embodiments, for example, when the fingerprint identification chip 100 is relatively narrow, the first interval, the second interval and the third interval may also be set to be equal.

In an embodiment of the present invention, the detection sub-region 200 is a rectangle of K*K, and the distance between the detection sub-region 200 and the metal ring 300 is K, where K is a positive integer.

Specifically, taking the detection array shown in FIG. 3 as an example, the detection array is 160*80, the number of detection sub-regions 200 is 16, and the size of each detection sub-region 200 is 8*8(K*K) pixels The purpose of setting the detection sub-region 200 as a rectangle of K*K is: according to the fingerprint characteristics and detection principle, the interval between the ridges and valleys of the fingerprint is generally 8 pixels, and the size of each detection sub-region 200 is set to 8* 8(K*K) pixels to ensure that each detection sub-region 200 has a ridge or valley.

The arrangement sequence of the detection sub-regions will be described below in a specific embodiment.

Specifically, taking the detection array as 160*80 and the number of detection sub-areas 200 as 16 as an example, as shown in FIG. 3 , the detection sub-areas 200 are divided into 2 rows, and each row of detection sub-areas 200 includes 8 detection sub-areas 200, wherein the first to third detection sub-regions 200 have a first interval (for example, 8), the third to sixth detection sub-regions 200 have a second interval (for example, 16), and the sixth There is a third interval (eg, 8) between the eighth detection sub-region 200 . In addition, each detection sub-region 200 is a rectangle of K*K (eg, 8*8), and the distance between the detection sub-region 200 and the metal ring 300 is K (eg, 8).

In the fingerprint identification device of the embodiment of the present invention, after detecting that the metal ring is touched for a first preset time, the fingerprint identification chip further detects the number of covered detection sub-regions, and if the number is greater than the preset threshold, the fingerprint identification chip When the fingerprint identification scanning function is activated, the fingerprint identification device realizes two-level wake-up when the fingerprint identification scanning function is activated, which avoids turning on the fingerprint scanning function due to accidental touch, thereby greatly reducing power consumption and improving user experience.

In order to realize the above embodiments, the present invention also provides a mobile terminal. The mobile terminal includes the fingerprint identification device 10 according to the embodiment of the present invention.

Specifically, the fingerprint identification device 10 is applied to a mobile terminal, wherein the fingerprint identification device 10 may be arranged on the front side of the mobile terminal, or may be arranged on the back side of the mobile terminal.

In the mobile terminal of the embodiment of the present invention, the fingerprint identification device realizes two-level wake-up when the fingerprint identification scanning function is activated, which avoids turning on the fingerprint scanning function due to false touches, thereby greatly reducing the power consumption of the mobile terminal and improving the user experience. .

In order to realize the above embodiments, the present invention also provides a wake-up method for a fingerprint identification device.

FIG. 4 is a flowchart of a wake-up method of a fingerprint identification device according to an embodiment of the present invention. Wherein, the fingerprint identification device includes: a fingerprint identification chip, a plurality of detection sub-regions arranged on the fingerprint identification chip, and a metal ring surrounding the fingerprint identification chip. As shown in FIG. 4 , the wake-up method of the fingerprint identification device includes the following steps:

S1, the fingerprint identification chip detects the metal ring.

Specifically, the fingerprint identification device is applied to a mobile terminal. When the mobile terminal is in standby mode, the fingerprint identification chip detects the metal ring, that is, detects whether the metal ring is touched.

S2, after detecting that the metal ring is touched for the first preset time, the fingerprint identification chip further detects the plurality of detection sub-regions.

Specifically, if the metal ring is touched for the first preset time, it means that a finger or a conductor is touching the fingerprint identification device at this time, then the fingerprint identification chip needs to further determine whether it is a valid finger touch, that is, to detect the fingerprint identification device. The number of detection sub-regions covered.

S3, when it is detected that the number of covered detection sub-regions is greater than the preset threshold, the fingerprint identification chip starts fingerprint identification scanning.

Specifically, if the number of covered detection sub-regions is greater than the preset threshold, it is determined as a valid finger touch, then the fingerprint identification chip starts fingerprint identification scanning, performs fingerprint scanning of the entire region, and then performs subsequent work such as fingerprint matching.

In addition, if it is detected that the number of covered detection sub-regions is not greater than the preset threshold, it means that it is not a valid finger touch, then the fingerprint identification chip continues to detect the metal ring until there is no finger touch.

In an embodiment of the present invention, the plurality of detection sub-regions are divided into N rows, where N is a positive integer.

In an embodiment of the present invention, each row of detection sub-regions includes M detection sub-regions, wherein each adjacent two detection sub-regions in the first to i-th detection sub-regions have a first interval, and the first There is a second interval between every two adjacent detection sub-regions in the i to jth detection sub-regions, and there is a third interval between every adjacent two detection sub-regions in the j-th to M-th detection sub-regions , where i is a positive integer less than j, and j is a positive integer less than M.

In one embodiment of the present invention, the first interval and the third interval are equal, and the second interval is greater than the first interval.

In an embodiment of the present invention, the detection sub-region is a rectangle of K*K, and the distance between the detection sub-region and the metal ring is K, where K is a positive integer.

In the wake-up method for a fingerprint identification device according to an embodiment of the present invention, after detecting that the metal ring is touched for a first preset time, the fingerprint identification chip further detects the number of covered detection sub-regions, and if the number is greater than the preset threshold, then The fingerprint identification chip starts fingerprint identification scanning, and this method avoids turning on the fingerprint scanning function due to false touches, thereby greatly reducing power consumption and improving user experience.

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

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

Any description of a process or method in the flowcharts or otherwise described herein may be understood to represent a module, segment or portion of code comprising one or more executable instructions for implementing a specified logical function or step of the process , and the scope of the preferred embodiments of the invention includes alternative implementations in which the functions may be performed out of the order shown or discussed, including performing the functions substantially concurrently or in the reverse order depending upon the functions involved, which should It is understood by those skilled in the art to which the embodiments of the present invention belong.

The logic and/or steps represented in flowcharts or otherwise described herein, for example, may be considered an ordered listing of executable instructions for implementing the logical functions, may be embodied in any computer-readable medium, For use with, or in conjunction with, an instruction execution system, apparatus, or device (such as a computer-based system, a system including a processor, or other system that can fetch instructions from and execute instructions from an instruction execution system, apparatus, or apparatus) or equipment. For the purposes of this specification, a "computer-readable medium" can be any device that can contain, store, communicate, propagate, or transport the program for use by or in connection with an instruction execution system, apparatus, or apparatus. More specific examples (non-exhaustive list) of computer readable media include the following: electrical connections with one or more wiring (electronic devices), portable computer disk cartridges (magnetic devices), random access memory (RAM), Read Only Memory (ROM), Erasable Editable Read Only Memory (EPROM or Flash Memory), Fiber Optic Devices, and Portable Compact Disc Read Only Memory (CDROM). In addition, the computer readable medium may even be paper or other suitable medium on which the program may be printed, as the paper or other medium may be optically scanned, for example, followed by editing, interpretation, or other suitable medium as necessary process to obtain the program electronically and then store it in computer memory.

It should be understood that various parts of the present invention may be implemented in hardware, software, firmware or a combination thereof. In the above-described embodiments, various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented by any one or a combination of the following techniques known in the art: Discrete logic circuits, application specific integrated circuits with suitable combinational logic gates, Programmable Gate Arrays (PGA), Field Programmable Gate Arrays (FPGA), etc.

Those of ordinary skill in the art can understand that all or part of the steps carried by the methods of the above embodiments can be completed by instructing the relevant hardware through a program, and the program can be stored in a computer-readable storage medium, and the program is stored in a computer-readable storage medium. When executed, one or a combination of the steps of the method embodiment is included.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing module, or each unit may exist physically alone, or two or more units may be integrated into one module. The above-mentioned integrated modules can be implemented in the form of hardware, and can also be implemented in the form of software function modules. If the integrated modules are implemented in the form of software functional modules and sold or used as independent products, they may also be stored in a computer-readable storage medium.

The above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, and the like. Although the embodiments of the present invention have been shown and described above, it should be understood that the above-mentioned embodiments are exemplary and should not be construed as limiting the present invention. Embodiments are subject to variations, modifications, substitutions and variations.

Claims (3)

1. A fingerprint identification device, characterized in that, comprising a fingerprint identification chip, a plurality of detection sub-regions arranged on the fingerprint identification chip, and a metal ring surrounding the fingerprint identification chip, wherein the fingerprint identification chip for detecting the number of covered detection sub-regions after detecting that the metal ring is touched for a first preset time, and if the number is greater than a preset threshold, the fingerprint identification chip starts fingerprint identification scanning; The plurality of detection sub-regions are divided into N rows, where N is a positive integer, and each row of detection sub-regions includes M detection sub-regions, wherein each adjacent two detection sub-regions in the first to i-th detection sub-regions There is a first interval between the detection sub-areas, a second interval is provided between every two adjacent detection sub-areas in the i-th to j-th detection sub-areas, and every adjacent detection sub-area in the j-th to M-th detection sub-areas has a second interval. There is a third interval between the two detection sub-regions, where i is a positive integer smaller than j, j is a positive integer smaller than M, the first interval and the third interval are equal, and the second interval is greater than the first interval. an interval; The detection sub-region is a rectangle of K*K, and the distance between the detection sub-region and the metal ring is K, where K is a positive integer. 2 . A mobile terminal, comprising the fingerprint identification device according to claim 1 . 3 . 3. A wake-up method for a fingerprint identification device, wherein the fingerprint identification device comprises a fingerprint identification chip, a plurality of detection sub-regions arranged on the fingerprint identification chip, and a detection sub-region surrounding the fingerprint identification chip. A metal ring, wherein the plurality of detection sub-regions are divided into N rows, N is a positive integer, and each row of detection sub-regions includes M detection sub-regions, wherein each adjacent detection sub-region in the 1st to i-th detection sub-regions There is a first interval between the two detection sub-regions of the There is a third interval between two adjacent detection sub-regions, where i is a positive integer smaller than j, j is a positive integer smaller than M, the first interval and the third interval are equal, and the second interval is greater than the first interval; The detection sub-region is a rectangle of K*K, and the distance between the detection sub-region and the metal ring is K, where K is a positive integer The method includes the following steps: The fingerprint identification chip detects the metal ring; After detecting that the metal ring is touched for a first preset time, the fingerprint identification chip further detects the plurality of detection sub-regions; When it is detected that the number of covered detection sub-regions is greater than the preset threshold, the fingerprint identification chip starts fingerprint identification scanning.