CN105446451A - 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 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 identification technology has been successfully applied to mobile phones. More and more mobile phone companies also regard fingerprint identification as the standard configuration of mobile phones in the future. Biometric identification is widely used in the new generation of electronic devices, based on the stability of fingerprints. and uniqueness to ensure security. Currently, fingerprint recognition devices are applied to mobile phones on the back of the mobile phone or on the home button of the mobile phone, and only need to press the sensor when unlocking.

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

Contents of the invention

The present invention aims to solve one of the technical problems in the related art at least to a certain extent. For this reason, an object of the present invention is to propose a kind of fingerprint identification device, this fingerprint identification device has realized two-level wake-up when starting fingerprint identification scanning function, has avoided turning on fingerprint scanning function due to mistaken touch, thereby has reduced power consumption greatly , which improves the user experience.

A second object of the present invention is to propose a mobile terminal.

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

In order to achieve the above purpose, the fingerprint recognition device of the embodiment of the first aspect of the present invention includes a fingerprint recognition chip, a plurality of detection sub-regions arranged on the fingerprint recognition chip, and a metal ring surrounding the fingerprint recognition 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 the fingerprint recognition scan.

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

In order to achieve the above purpose, the mobile terminal of the embodiment of the second aspect of the present invention includes the fingerprint identification device of 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 starting the fingerprint identification scanning function, which avoids turning on the fingerprint scanning function due to a false touch, thereby greatly reducing the power consumption of the mobile terminal, and further improving the user experience. experience.

In order to achieve the above object, the wake-up method of the fingerprint recognition device according to the embodiment of the third aspect of the present invention, the fingerprint recognition device includes a fingerprint recognition chip, a plurality of detection sub-regions arranged on the fingerprint recognition chip and surrounding the fingerprint Identifying the metal ring of the chip, the method includes the following steps: the fingerprint identification chip detects the metal ring; after detecting that the metal ring is touched and lasts for a first preset time, the fingerprint identification chip further Detecting the plurality of detection sub-regions; when detecting 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 the fingerprint identification device in the embodiment of the present invention, after the fingerprint identification chip detects that the metal ring is touched for a first preset time, it further detects the number of covered detection sub-regions, if the number is greater than the preset threshold, Then the fingerprint identification chip starts the fingerprint identification scanning, and this method avoids the fingerprint scanning function being turned on due to a false touch, thereby greatly reducing power consumption and improving user experience.

Description of drawings

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

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

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

Fig. 4 is a flowchart of a method for waking up a fingerprint identification device according to an embodiment of the present invention.

detailed description

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

The following describes the fingerprint identification 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 , the fingerprint identification device 10 of the embodiment of the present invention includes: a fingerprint identification chip 100 , a plurality of detection sub-regions 200 and a metal ring 300 .

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

Specifically, the metal ring 300 is connected to the internal emission pin of the fingerprint recognition chip 100, and is used not only as a signal emitter, but also as a CSD detection (i.e. capacitance detection). The artificially set area on the array can be used as the basis for judging the area covered by the finger.

More specifically, when the fingerprint identification chip 100 detects that the metal ring 300 is touched and lasts for a first preset time, it will trigger the Sub_area (representing the detection sub-area) detection, and the Sub_area detection will be triggered to determine the area pressed by the finger Whether the acquisition threshold is reached, that is, whether the number of covered detection sub-regions 200 detected by the fingerprint recognition chip 100 is greater than the preset threshold, if yes, the fingerprint recognition and scanning function of the fingerprint recognition chip 100 will be awakened, that is, the fingerprint recognition chip 100 performs the entire detection process. Scan the fingerprint of the area, and then perform 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, it means 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 of the embodiment of the present invention is applied to a mobile terminal, wherein the fingerprint identification device 10 can be arranged on the front or back of the mobile terminal.

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

For example, if the fingerprint recognition chip 100 detects that the metal ring 300 is touched for 4 consecutive times, it means that a finger or conductor is touching the fingerprint recognition device 10 at this time, and the fingerprint recognition 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, determine whether the pressed area meets the requirements. If the number of covered detection sub-areas 200 reaches the preset threshold, there are 10 detection sub-areas 200 is covered by a finger, it is considered that the area pressed by the finger reaches the finger scanning threshold. At this time, the fingerprint identification chip 100 will notify the mobile terminal to send an interrupt to scan the entire area, that is, the fingerprint identification chip 100 starts the fingerprint identification scan, and then performs matching. If the matching is successful Then the mobile terminal is unlocked and the screen lights up, and the mobile terminal wakes up successfully; if multiple matchings are unsuccessful, the mobile terminal will also light up the screen and prompt that there are too many failures, please wait or use other unlocking methods such as password unlocking.

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

In one embodiment of the present invention, each row of detection sub-regions 200 includes M detection sub-regions 200, wherein, there is a first Interval, there is a second interval between every two adjacent detection sub-areas in the i-th to j-th detection sub-areas 200, 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, wherein, i is a positive integer smaller than j, and j is a positive integer smaller than M.

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

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

Certainly, 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 K*K rectangle, and the distance between the detection sub-region 200 and the metal ring 300 is K, wherein 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 Point, the purpose of setting the detection sub-region 200 as a K*K rectangle is: according to the characteristics of the fingerprint and the detection principle, the interval between the ridge and the valley of the fingerprint is generally 8 pixels, and the size of each detection sub-region 200 is set to 8*K 8(K*K) pixels, to ensure that each detection sub-region 200 has a ridge or a valley.

The arrangement order 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-regions 200 as 16 as an example, as shown in FIG. 3 , the detection sub-regions 200 are divided into two rows, and each row of detection sub-regions 200 includes 8 detection sub-regions 200, wherein, there is a first interval (for example, 8) between the 1st to 3rd detection sub-areas 200, there is a second interval (for example, 16) between the 3rd to 6th detection sub-areas 200, and the 6th There is a third interval (for example, 8) between the eighth detection sub-region 200 . In addition, each detection sub-region 200 is a K*K (for example, 8*8) rectangle, and the distance between the detection sub-region 200 and the metal ring 300 is K (for example, 8).

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

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

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

In the mobile terminal of the embodiment of the present invention, the fingerprint identification device realizes two-stage wake-up when starting the fingerprint identification scanning function, avoiding the fingerprint scanning function being turned on due to false touch, thereby greatly reducing the power consumption of the mobile terminal, thereby improving user experience .

In order to realize the above embodiments, the present invention also proposes a method for waking up a fingerprint identification device.

Fig. 4 is a flowchart of a method for waking up 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 Figure 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 the mobile terminal. In the standby mode of the mobile terminal, 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 a first preset time, the fingerprint recognition chip further detects a plurality of detection sub-regions.

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

S3, 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.

Specifically, if the number of covered detection sub-regions is greater than the preset threshold, it is judged as a valid finger touch, then the fingerprint identification chip starts fingerprint identification scanning, performs fingerprint scanning of the entire area, and then performs follow-up 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 multiple detection sub-areas are divided into N rows, where N is a positive integer.

In one embodiment of the present invention, each row of detection sub-regions includes M detection sub-regions, wherein there is a first interval between every two adjacent detection sub-regions in the 1st to i-th detection sub-regions, and the first interval There is a second interval between every two adjacent detection sub-areas in the i to j th detection sub-areas, and there is a third interval between every two adjacent detection sub-areas in the j-th to M th detection sub-areas , 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 larger than the first interval.

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

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

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

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

Any process or method descriptions in flowcharts or otherwise described herein may be understood to represent modules, segments or portions of code comprising one or more executable instructions for implementing specific logical functions or steps of the process , and the scope of preferred embodiments of the invention includes alternative implementations in which functions may be performed out of the order shown or discussed, including substantially concurrently or in reverse order depending on the functions involved, which shall It is understood by those skilled in the art to which the embodiments of the present invention pertain.

The logic and/or steps represented in the flowcharts or otherwise described herein, for example, can be considered as a sequenced listing of executable instructions for implementing logical functions, can be embodied in any computer-readable medium, For use with instruction execution systems, devices, or devices (such as computer-based systems, systems including processors, or other systems that can fetch instructions from instruction execution systems, devices, or devices and execute instructions), or in conjunction with these instruction execution systems, devices or equipment used. For the purposes of this specification, a "computer-readable medium" may be any device that can contain, store, communicate, propagate or transmit a program for use in or in conjunction with an instruction execution system, device or device. More specific examples (non-exhaustive list) of computer-readable media include the following: electrical connection with one or more wires (electronic device), portable computer disk case (magnetic device), random access memory (RAM), Read Only Memory (ROM), Erasable and 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 can be printed, since the program can be read, for example, by optically scanning the paper or other medium, followed by editing, interpretation or other suitable processing if necessary. The program is processed electronically and stored in computer memory.

It should be understood that various parts of the present invention can be realized by hardware, software, firmware or their combination. In the embodiments described above, various steps or methods may be implemented by 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 combination of the following techniques known in the art: Discrete logic circuits, ASICs with suitable combinational logic gates, programmable gate arrays (PGAs), field programmable gate arrays (FPGAs), 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 related hardware through a program, and the program can be stored in a computer-readable storage medium. During execution, one or a combination of the steps of the method embodiments is included.

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

The storage medium mentioned above 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 can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, those skilled in the art can make the above-mentioned The embodiments are subject to changes, modifications, substitutions and variations.

Claims (11)

1. a fingerprint identification device, it is characterized in that, comprise fingerprint recognition chip, be arranged on the multiple detection subregion on described fingerprint recognition chip and the becket around described fingerprint recognition chip, wherein, described fingerprint recognition chip is used for detecting that described becket is touched and continues after the first Preset Time, detect the quantity of capped detection subregion, if described quantity is greater than predetermined threshold value, then described fingerprint recognition chip enable fingerprint recognition scanning.

2. fingerprint identification device as claimed in claim 1, it is characterized in that, described multiple detection subregion is divided into N capable, and N is positive integer.

3. fingerprint identification device as claimed in claim 2, it is characterized in that, described often row detects subregion and comprises M detection subregion, wherein, between two detection subregions often adjacent in 1 to the i-th detection subregion, there is the first interval, the i-th to jth detects between two detection subregions often adjacent in subregion has the second interval, jth detects between two detection subregions often adjacent in subregion to M has the 3rd interval, wherein, i is the positive integer being less than j, and j is the positive integer being less than M.

4. fingerprint identification device as claimed in claim 3, it is characterized in that, described first interval is equal with the 3rd interval, and described second interval is greater than described first interval.

5. fingerprint identification device as claimed in claim 1, it is characterized in that, described detection subregion is the rectangle of K*K, and the distance of described detection subregion and described becket is K, and wherein, K is positive integer.

6. a mobile terminal, is characterized in that, comprises the fingerprint identification device as described in any one of claim 1-5.

7. the awakening method of a fingerprint identification device, it is characterized in that, wherein, described fingerprint identification device comprises fingerprint recognition chip, is arranged on the multiple detection subregion on described fingerprint recognition chip and the becket around described fingerprint recognition chip, said method comprising the steps of:

Described fingerprint recognition chip detects described becket;

When detecting that described becket is touched and after lasting first Preset Time, described fingerprint recognition chip detects described multiple detection subregion further;

When detecting that the quantity of capped detection subregion is greater than predetermined threshold value, described fingerprint recognition chip enable fingerprint recognition scanning.

8. the awakening method of fingerprint identification device as claimed in claim 7, it is characterized in that, described multiple detection subregion is divided into N capable, and N is positive integer.

9. the awakening method of fingerprint identification device as claimed in claim 8, it is characterized in that, described often row detects subregion and comprises M detection subregion, wherein, between two detection subregions often adjacent in 1 to the i-th detection subregion, there is the first interval, the i-th to jth detects between two detection subregions often adjacent in subregion has the second interval, jth detects between two detection subregions often adjacent in subregion to M has the 3rd interval, wherein, i is the positive integer being less than j, and j is the positive integer being less than M.

10. the awakening method of fingerprint identification device as claimed in claim 9, it is characterized in that, described first interval is equal with the 3rd interval, and described second interval is greater than described first interval.

The awakening method of 11. fingerprint identification devices as claimed in claim 7, it is characterized in that, described detection subregion is the rectangle of K*K, and the distance of described detection subregion and described becket is K, and wherein, K is positive integer.