KR101696445B1 - Apparatus and method for scanning biometric information using pressing-point as a reference - Google Patents

Abstract

The present invention relates to a biometric information recognition apparatus and a method for the apparatus to scan biometric information of a user by selectively activating a plurality of piezoelectric elements. Specifically, the present invention relates to a method for effectively scanning biometric information of a user by detecting pressure applied to a substrate when the pressure is applied by a behavior that a user puts a finger on the substrate to identify a pressure point, and to selectively activate only a few piezoelectric elements corresponding to a relevant position, and an apparatus therefor.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of scanning a user's biometric information on the basis of a point on a substrate and a biometric information recognizing device for the same.

The present invention relates to a biometric information recognizing apparatus and a method of selectively activating a plurality of piezoelectric elements to scan biometric information of a user. More specifically, the present invention detects a pressure applied to a substrate when a user applies a pressure on a substrate by pressing a finger on the substrate, discriminates the pressure point, selectively activates only a small number of piezoelectric elements corresponding to the position, And more particularly, to a method and an apparatus for efficiently scanning biometric information of a subject.

User authentication is a necessary procedure for all financial transactions. Especially, as interest in mobile finance has been increased due to development of networks and portable terminals, demand for fast and accurate user authentication devices and authentication methods is increasing.

On the other hand, the fingerprint of the user is one of the authentication parameters that can satisfy the above demand, and many businesses and developers continue to develop devices and methods that can authenticate using the fingerprint of the user.

2. Description of the Related Art In recent years, studies on a so-called ultrasound method for detecting a shape of a fingerprint by generating an ultrasonic wave out of a conventional method of capturing an image of a fingerprint using an optical system have been actively conducted.

Meanwhile, a method of scanning biometric information including a fingerprint of a user using an ultrasonic wave is performed through various processes. In order to improve the efficiency of each process in order to improve the power consumption and scanning time of the biometric information recognition device Efforts are continuing.

The present invention minimizes the number of piezoelectric elements to be activated for scanning biometric information, and at the same time effectively reduces the time required for scanning. Generally, scanning of the entire fingerprint is performed when acquiring fingerprint information of a user, A scanning method in which only a small number of piezoelectric elements are activated based on a pressure point of the pressure point, that is, the pressure points are separated in a short period of time.

The present invention has been invented based on such a technical background and has been invented to provide additional technical elements that can not easily be invented by those skilled in the art as well as satisfying the technical requirements of the present invention.

Korean Patent Publication No. 10-2005-0047921 (published on May 23, 2005)

An object of the present invention is to allow a biometric information recognizing device to selectively activate only a small number of piezoelectric elements based on a pressing point of a substrate area, thereby scanning a biometric information of a user, that is, a fingerprint, a blood vessel, and a shape of a bone.

The present invention also provides a biometric information recognition apparatus for selectively activating piezoelectric elements arranged on a substrate to minimize an effect of interference between an ultrasonic signal and a reflected signal.

According to an aspect of the present invention, there is provided a biometric information scanning method for a biometric information recognizing apparatus, comprising: (a) detecting a pressure applied to a substrate and specifying a pressing region; (b) generating a ultrasonic wave by activating the piezoelectric elements based on the position of the pressure point in the pressure area, and receiving the signal reflected by the user's living tissue; (c) acquiring biometric information based on the signal reflected by the user's biotissue.

Meanwhile, the step of activating the piezoelectric elements in the step (b) may include the steps of: setting a piezoelectric element corresponding to the position of the pressure point as a signal generating element; Setting at least one piezoelectric element among the piezoelectric elements other than the signal generating element as a signal receiving element; Generating an ultrasonic signal by activating the signal generating element; Receiving the reflected wave signal reflected by the user's living tissue by activating the signal receiving element; .

In the biometric information scanning method of the biometric information recognition apparatus, the piezoelectric elements may be arranged in a matrix form having a plurality of rows and a plurality of columns on a substrate, or the piezoelectric elements may be arranged in a matrix Wherein the piezoelectric elements constituting an arbitrary row are arranged to be shifted from the piezoelectric elements constituting the preceding row of the arbitrary row or the piezoelectric elements constituting the succeeding row of the arbitrary row.

Further, in the biometric information scanning method of the biometric information recognition apparatus, the step (a) may include sensing a position of a plurality of pressure points of the substrate area after sensing the pressure applied on the substrate, On the substrate is specified as a reference.

In this case, in the step (a), when electric polarization occurs on the piezoelectric element due to the pressure applied on the substrate, the position of the plurality of points where the pressure is applied is detected.

The biometric information scanning method of the biometric information recognition apparatus may further include the step of activating the piezoelectric elements based on the position of the pressure point, wherein the step (d) further comprises the step of: (d) And the like.

The method may further include receiving ultrasound signals generated in step (d) by receiving signals reflected by the user's blood vessels or bones to acquire additional biometric information.

According to another aspect of the present invention, there is provided a biometric information recognizing apparatus comprising: a substrate; A plurality of piezoelectric elements arranged on the substrate; And a controller; Wherein the control unit specifies a pressure area on the substrate, specifies a pressure point in the pressure area, activates a plurality of piezoelectric elements on the basis of the pressure point, and transmits the ultrasonic signal reflected by the living tissue of the user And acquires biometric information using the biometric information.

According to the present invention, it is possible to effectively reduce the scanning area in the biometric information scanning, thereby reducing the time required for scanning the biometric information.

According to the present invention, it is possible to limit the number of piezoelectric elements required for biometric information scanning to a minimum, thereby reducing the power required for scanning biometric information.

Fig. 1 shows an embodiment of a biometric information scanning method according to the present invention.
FIG. 2 is a view showing a state in which piezoelectric elements formed in a matrix form on a substrate are activated by one row and one column to scan biometric information.
Fig. 3 shows a state in which piezoelectric elements formed by shifting the front and rear rows on the substrate are activated by one row and one row, and the biometric information is scanned.
FIG. 4 is a view showing a case where piezoelectric elements formed in the form of a matrix on a substrate form a plurality of rows to form one recognition row.
FIG. 5 illustrates a state in which individual piezoelectric elements are selectively activated and scanned in a state where the recognition row as shown in FIG. 4 is set.
6 shows a state in which piezoelectric elements formed so that the front and rear rows are shifted on the substrate form a plurality of rows to form one recognition row.
FIG. 7 illustrates a state in which individual piezoelectric elements are selectively activated and scanned in a state where the recognition row as shown in FIG. 6 is set.
FIG. 8 shows a state in which a small number of piezoelectric elements are activated based on a pushing point, in which the piezoelectric elements are formed in a matrix form on a substrate and the piezoelectric elements are arranged such that the front and rear rows are shifted on the substrate.
FIGS. 9 and 10 show the progress of activation of each piezoelectric element according to the shape of the piezoelectric elements formed on the substrate, by performing the scanning by continuously activating the piezoelectric elements based on the pressing point.
FIG. 11 is a flowchart illustrating a procedure in which a biometric information recognizing device generates ultrasonic waves of different frequencies and acquires two pieces of biometric information.

DETAILED DESCRIPTION OF THE EMBODIMENTS Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the like elements throughout. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment according to the present invention will be described in detail with reference to the accompanying drawings.

The embodiments disclosed herein should not be construed or interpreted as limiting the scope of the present invention. It will be apparent to those of ordinary skill in the art that the description including the embodiments of the present specification has various applications. Accordingly, any embodiment described in the Detailed Description of the Invention is illustrative for a better understanding of the invention and is not intended to limit the scope of the invention to embodiments.

The functional blocks shown in the drawings and described below are merely examples of possible implementations. In other implementations, other functional blocks may be used without departing from the spirit and scope of the following detailed description. Also, although one or more functional blocks of the present invention are represented as discrete blocks, one or more of the functional blocks of the present invention may be a combination of various hardware and software configurations that perform the same function.

In addition, the expression "including any element" is merely an expression of an open-ended expression, and is not to be construed as excluding the additional elements.

Further, when a component is referred to as being connected or connected to another component, it may be directly connected or connected to the other component, but it should be understood that there may be other components in between.

Also, the expressions such as 'first, second', etc. are used only to distinguish a plurality of configurations, and do not limit the order or other features between configurations.

When a part is referred to as being "connected" to another part, it includes not only "directly connected" but also "indirectly connected" to another part in between. Also, when an element is referred to as "comprising ", it means that it can include other elements, not excluding other elements unless specifically stated otherwise.

Prior to describing the scanning method in earnest, the basic structure of the biometric information recognizing device as a subject of scanning will be described.

The biometric information recognizing apparatus according to the present invention includes a substrate, a plurality of piezoelectric elements formed on the substrate, and a controller for setting the piezoelectric elements as a recognition row and selectively activating the same.

First, a substrate is a plate on which a plurality of piezoelectric elements are formed, and means an insulating material capable of forming a conductor pattern on the surface of an insulating substrate. The substrate itself may be rigid or flexible, and the raw materials for the substrate may be chemically reinforced / semi-tempered glass such as soda lime glass or aluminosilicate glass, polyimide, polyethylene terephthalate, propylene glycol, Reinforced or soft plastic such as polycarbonate, sapphire, and the like.

The substrate may be a flexible substrate having a flexible property, a curved substrate, or a bended substrate. A biometric information recognizing device including such a substrate may be a flexible substrate, Flexible, curved, and bendable characteristics can be obtained depending on the application and function.

Meanwhile, as a preferred embodiment, the substrate may be a printed circuit board (PCB). A PCB board is a circuit board that expresses electrical wiring connecting circuit components based on a circuit design with wiring diagrams, reproduces electrical conductors on the insulation, mounts electrical components and forms wiring to connect them circuitatically , The parts other than the electrical connection function can be fixed firmly.

Meanwhile, the biometric information recognizing apparatus according to the present invention may further include a cover substrate. The cover substrate is formed above a plurality of piezoelectric elements formed on the substrate, which means a substrate to which the user's finger is directly contacted. The cover substrate may be made of glass, though the same manufacturing raw material as the above-mentioned substrate may be utilized.

Next, a plurality of piezoelectric elements formed on the substrate function to generate an ultrasonic signal or to receive a reflection of the ultrasonic signal from the outside. The piezoelectric elements are patterned on a substrate in a shape desired by a designer, Zirconium, and titanium on a patterned electrode, and then coating the material with a mixture of lead, zirconium, and titanium.

The piezoelectric elements of the present invention are different from conventional fingerprint recognition devices in that a ceramic structure is disposed one by one on a substrate or a conductive electrode, but an electrode is patterned in an arbitrary shape on one flat substrate, In which a coating layer of a PZT component is laminated to form a piezoelectric element group. The method of depositing the coating layer of the PZT component on the electrode may include a method of putting the substrate on which the electrode patterning is completed into the solution containing the PZT component or a method of transferring the coating film of the PZT component onto the electrode patterned substrate There can be a way.

Meanwhile, the biometric information recognizing apparatus according to the present invention assumes that the piezoelectric elements are formed as shown in FIG. 2 or FIG. 3 as will be described later. That is, in the case where the piezoelectric elements are formed according to the above-described method, the array of the piezoelectric elements may vary depending on the shape of the electrode patterned on the substrate by the designer, but in this detailed description, The following description will be made on the premise that

In this detailed description, terms such as a recognition row or a recognition column are defined and used. The recognition row means a virtual row on the substrate including the plurality of piezoelectric elements, and the recognition column means a virtual column on the substrate . At this time, the recognition row and the recognition row are set by the control unit.

The control unit functions to set a plurality of piezoelectric elements as arbitrary recognition rows or recognition columns and selectively activate them as described above.

Specifically, the control unit sets some of the plurality of piezoelectric elements existing on the substrate to the recognition row, activates the piezoelectric elements constituting each recognition row, and generates activated ultrasonic signals for the activated elements to receive the reflected waves So that the biometric information of the user can be grasped.

Meanwhile, the control unit not only activates the piezoelectric elements, but also specifies a pressing region on the substrate, and further specifies a pressing point as a reference point for scanning. As will be described later, the control unit specifies a pressing region by indicating which region on the substrate the pressure is applied to when the user places his or her finger on the biometric information recognizing apparatus. After specifying one or two pressing points in the pressing region, And activates the piezoelectric elements on the basis of a single pressure point or a plurality of pressure points.

The control unit may include at least one computing unit and a storage unit. The computing unit may be a general-purpose central processing unit (CPU), a programmable device element (CPLD, FPGA) , An application specific integrated circuit (ASIC), or a microcontroller chip. In addition, a volatile memory element, a non-volatile memory element, or a non-volatile electromagnetic storage element may be utilized as the storage means.

In the meantime, each of the piezoelectric elements in the present invention can be individually activated, and the controller can also control the piezoelectric elements by dividing them into independent identifiers. Accordingly, in a completely different manner from the conventional fingerprint recognition apparatus, An information recognition process, that is, a scanning process can be implemented.

1 schematically shows a scanning method of a biometric information recognizing apparatus according to the present invention.

Referring to FIG. 1, a scanning method according to the present invention includes a first step of detecting a pressure applied to a substrate by a bio-information recognition device and specifying a pressing area, a step of specifying a pressing point 200 in the pressing area, A step of activating the piezoelectric elements based on the position of the ultrasonic wave generator 200 to generate ultrasonic waves, the ultrasonic waves receiving signals reflected by the user's living tissue, and the step of acquiring biological information based on the reflected ultrasonic signals .

That is, in the scanning method according to the present invention, after specifying the pressing region on the substrate, the pressing point 200 is specified within the pressing region, and only the peripheral piezoelectric elements are positioned on the basis of the position of the pressing point 200 And acquiring other biometric images such as blood vessels and bones, that is, biometric information.

First, a biometric information recognizing device detects a pressure applied on a substrate and identifies a pressing region.

A biometric information recognizing device detects a region applied by a finger when a user places a finger on the substrate for biometric information recognition, and specifies the region as a pressurized region. At this time, there may be various methods for detecting the area where the pressure is applied by the biometric information recognizing device, but it is possible to detect the area where the pressure is applied by utilizing the piezoelectric element already formed on the substrate . That is, when a physical pressure from the outside is applied to the piezoelectric element, a polarization phenomenon occurs and a signal can be generated. By using such a property of the piezoelectric element, the biometric information recognizing device can recognize the pressure .

On the other hand, in order to detect the pressure and specify the pressing area on the substrate, it is necessary to determine the limit of the area in which the piezoelectric elements to be activated for generating and receiving ultrasound signals are to be activated. That is, the present invention aims to determine one or two pincushion points 200 within the pressure region determined in the first stage, and activate a small number of piezoelectric elements around the pincushion point 200 determined as described above.

Next, a description will be given of a step of specifying the position of the pressure point 200 within the pressure region and activating the piezoelectric elements based on the position of the pressure point 200 thus specified.

The pawl point 200 refers to any one point or a plurality of points that become reference points in the pressing region on the substrate. The pawl point 200 indicates which point the biometric information recognition apparatus will center when activating the piezoelectric elements It serves as a point of reference. For example, the position of the pressing point 200 may be a reference for determining the position of a signal generating element to be described later.

As described above, the biometric information recognizing apparatus according to the present invention can form piezoelectric elements in two patterns on a substrate. Hereinafter, referring to FIG. 2 to FIG. 7, a plurality of piezoelectric elements are activated, The process of acquiring the information will be described in detail. As described above, the control unit of the biometric information recognizing device selectively activates a plurality of piezoelectric elements to drive them as recognition rows or recognition rows.

2 is a view showing a state in which piezoelectric elements 300 are arranged in a matrix form on a substrate 100 of a biological information recognition apparatus. Referring to FIG. 2, a plurality of piezoelectric elements 300 are arranged in a lateral direction to form one row, and a plurality of another plurality of piezoelectric elements 300 are arranged in a longitudinal direction to form one row Can be achieved. Also, at this time, the respective rows may be formed preferably at equal intervals, which can be similarly applied to columns. When this arrangement type is examined again from the viewpoint of one specific piezoelectric element 300, there are other piezoelectric elements 300 in the up / down and left / right direction of a certain piezoelectric element 300, / Lower / left / right piezoelectric elements 300 can be constant.

2, the biometric information recognizing device may set the piezoelectric elements 300 arranged on one row to one recognition row 110. In this case,

For example, in the step of activating a recognition row 110, the piezoelectric elements 300 constituting one row on the substrate are referred to as a first recognition row 110, and the piezoelectric elements 300 constituting two rows are referred to as a second The recognition line 110 or the like can be set and activated.

In this case, the fact that the piezoelectric elements 300 constituting the recognition row 110 are activated means that some of the piezoelectric elements 300 constituting the recognition row 110 are activated by the signal generating element 311 And the other piezoelectric elements 300 are activated as the signal receiving element 313 so that the signal generating element 311 generates an ultrasonic signal and the signal receiving element 313 receives a reflected wave signal. In this case, the reflected wave signal means that the generated ultrasonic signal is reflected by the user's finger skin or a living tissue (blood vessel, bone) in the finger.

For example, when activating the first recognition row 110, the recognition row 110 is generated in the following two ways. That is, when the first recognition row 110 is activated, the biometric information recognizing device acquires a fingerprint image by sequentially activating each row and each column. Can be activated.

First, in the biometric information recognition apparatus, the odd-numbered piezoelectric elements 300 of the first recognition row 110 are set to the signal generating element 311, the even-numbered piezoelectric elements 300 are set to the signal receiving element 313 The piezoelectric elements 300 can be simultaneously activated to perform functions of ultrasonic wave generation and reflection wave reception.

The biometric information recognizing device may be constructed such that the specific piezoelectric element 300 of the first recognition row 110 is connected to the signal generating element 311 and the piezoelectric element 300 adjacent to the signal generating element 311 is connected to the signal receiving element 311, The piezoelectric element 300 adjacent to the previously set signal generating element 311 is connected to the new signal generating element 311 and the piezoelectric element 300 adjacent to the signal generating element 311, The piezoelectric element 300 is sequentially set to the signal generating element 311 by setting the element 300 as a new signal receiving element 313 and performing the secondary activation and the signal generating element 311 is newly It is possible to activate each recognition row 110 or the recognition column while setting the piezoelectric elements 300 adjacent to the piezoelectric elements 300 to the signal receiving element 313. For example, referring to FIG. 2, the biometric information recognizing device may include a second piezoelectric element 300 of the first recognition row 110 as a signal generating element 311, first and third piezoelectric elements 300 After the first piezoelectric element 300 is set to the signal receiving element 313 and the piezoelectric elements 300 are first activated to generate ultrasonic waves and receive reflected waves, The second and fourth piezoelectric elements 300 are set as the element 311 and the signal receiving element 313 is set as the signal receiving element 313 so that the piezoelectric elements 300 of the corresponding first recognition row 110, So that activation of the first recognition row 110 can be performed.

3, the piezoelectric elements 300 are arranged in a plurality of rows on the substrate 100 of the biometric information recognizing device, and the piezoelectric elements 300 constituting any arbitrary row are arranged in a row (Hereinafter, referred to as a row) or a row immediately below (hereinafter referred to as a rear row).

Means that the piezoelectric elements 300 of the previous row or the piezoelectric elements 300 of the corresponding row are arranged in a position shifted from the piezoelectric elements 300 of the previous row or the row of piezoelectric elements 300 of the succeeding row, Means that heat is not generated in the longitudinal axis when the row of piezoelectric elements 300 are arranged on the substrate 100. It should be noted, however, that the row of piezoelectric elements 300 in the row and the row of the piezoelectric elements 300 in the previous row row generate heat toward the longitudinal axis when arranged on the substrate 100. That is, when the piezoelectric elements 300 of the first row and the third row are connected in the vertical phase, one row is formed as shown in FIG.

More preferably, among the plurality of piezoelectric elements 300 constituting a specific row, when the piezoelectric element 300 among the plurality of piezoelectric elements 300 is referred to as a reference, Means that it is arranged on an axis extending vertically from the center point of the line segment including the two piezoelectric elements 300 present at a nearest distance from the arbitrary piezoelectric element 300.

When the piezoelectric elements 300 are formed on the substrate 100 in this manner, the completed biometric information recognizing apparatus has the arrangement of the piezoelectric elements 300 in a matrix-distorted form as shown in FIG.

Meanwhile, in a state where the piezoelectric elements 300 are arranged as shown in FIG. 3, the biological information recognition apparatus can set the piezoelectric elements 300 arranged on one row to one recognition row 110.

At this time, the biometric information recognizing device can activate the first recognition row 110 in two ways as in the embodiment of FIG. That is, in the biometric information recognition apparatus, the odd-numbered piezoelectric elements 300 of the first recognition row 110 are set to the signal generating element 311, and the even-numbered piezoelectric elements 300 are set to the signal receiving element 313 The odd-numbered piezoelectric elements 300 are set to the signal receiving element 313 and the even-numbered piezoelectric elements 300 are set to the signal generating element 311) and the corresponding piezoelectric elements 300 are simultaneously activated to generate ultrasonic waves, Or the specific piezoelectric element 300 of the first recognition row 110 to the signal generating element 311 and the piezoelectric element 300 adjacent to the signal generating element 311 to the signal generating element 311, The piezoelectric element 300 close to the previously set signal generating element 311 is connected to the signal generating element 311 and to the signal generating element 311 close to the signal generating element 311 The piezoelectric element 300 is set as the signal receiving element 313, The piezoelectric elements 300 adjacent to the piezoelectric elements 300 are set to the signal generating elements 311 in order and the signal generating elements 311 are set to the signal receiving elements 313 The first recognition line 110 can be activated.

The method of activating the first recognition line 110 described with reference to FIGS. 2 and 3 can be similarly applied to the second recognition line 110 and the third recognition line 110 as well as the first recognition line 110.

4 shows a state in which the piezoelectric transducing elements 300 are arranged on the substrate 100 in the form of a matrix as shown in FIG. 2, and the biometric information recognizing device includes piezoelectric transducing elements 300 arranged on a plurality of ' And the recognition row 110 of FIG.

4 shows one example in which three rows of piezoelectric elements 300 on the substrate 100 are recognized as one recognition row 110. In FIG. At this time, the biometric information recognizing device selectively activates the piezoelectric elements 300 on the recognition row 110 to perform biometric information scanning by the recognition row 110, as follows.

The biometric information recognizing device first determines one or more of the plurality of piezoelectric elements 300 and sets it as the signal generating element 311. In this case, the signal generating element 311 Refers to a piezoelectric element 300 generating an ultrasonic signal. The controller applies an electrical signal or a pulse signal to a specific piezoelectric element 300 to cause the piezoelectric element 300 to vibrate and generate an ultrasonic signal It can be diverted. At this time, the size of the ultrasonic signal may be changed according to the size of the electric signal applied to the signal generating element 311. Also, as mentioned above, the control unit may internally store a separate identifier for the piezoelectric elements 300 existing on the substrate 100, and may control the piezoelectric element 300 at a specific position to be a signal generating element 311), it can be set and activated by applying an electrical signal based on the identifier of the corresponding piezoelectric element 300.

The biometric information recognizing device sets one or two or more of the piezoelectric elements 300 other than the previously set signal generating element 311 as the signal receiving element 313. In this case, The signal receiving element 313 functions to receive a reflected wave reflected by the biological tissue of the user and returned by the ultrasonic signal generated by the signal generating element 311. At this time, the biometric information recognizing device preferably sets the piezoelectric element 300 closest to the signal generating element 311 as the signal receiving element 313, which can reduce the energy loss due to the progress of the ultrasonic signal in the air So as to receive the reflected wave signal more clearly. When the signal generating element 311 is a specific one of the piezoelectric elements 300, the piezoelectric elements 300 existing in the upper, lower, left, and right positions of the signal generating element 311 are set as the signal receiving element 313, . However, such a patterning method is only one embodiment, and the control unit can set the piezoelectric elements 300 existing at an arbitrary position to the signal receiving element 313 irrespective of the degree of proximity to the signal generating element 311 You will have to understand. For example, in FIG. 4, eight peripheral piezoelectric elements 300 around the signal generating element 311 may be set as the signal receiving element 313.

Steps 3 and 4 are steps of activating the previously set signal generating element 311 and signal receiving element 313, respectively, so as to be driven according to respective functions. Specifically, the biological information recognition apparatus activates the signal generating element 311 to generate an ultrasonic signal, and activates the signal receiving element 313 to receive the reflected wave signal.

The bio-information recognition apparatus sets any one of the plurality of piezoelectric elements 300 adjacent to the signal generation element 311 as a new signal generation element 311. [ (Step 5) At this time, the new signal generating element 311 is selected among the piezoelectric elements 300 existing in proximity to the signal generating element 311 set in the first step. For example, the new signal generating element 311 set in step 5 can be set to any one of the piezoelectric elements 300 existing on the left or right side of the signal generating element 311 set in the first step.

On the other hand, the directionality of the signal generating element 311 newly set in step 5 is also related to the scanning direction. That is, when the newly set signal generating element 311 is set to the piezoelectric element 300 on the right side of the conventional signal generating element 311, the scanning direction becomes the right direction, and the newly set signal generating element 311 When the piezoelectric element 300 is set to the left side of the conventional signal generating element 311, the scanning direction becomes the left direction.

Step 6 is a step of newly setting the signal receiving element 313 in accordance with the new signal generating element 311 set in step 5 of the biometric information recognizing apparatus. Step 6 proceeds in a manner similar to that in which the signal receiving element 313 is set in step 2. [

It should be noted that the signal receiving element 313 set in this step may be overlapped with the signal receiving element 313 set in the second step. 5, when the signal generating element 311 is set to move to the right, the signal receiving element 313 corresponding to the signal generating element 311 also moves to the right along the signal generating element 311. At this time, There may be some overlapping piezoelectric elements 300, i.e., the signal receiving element 313.

Finally, steps 7 and 8 are the steps of activating the newly set signal generating element 311 and the signal receiving element 313 to function as ultrasonic wave generating and reflected wave receiving, respectively.

Activation of the recognition line 110 according to the present invention is performed by repeating the steps 1 to 8. In the case of the first recognition line 110, all of the piezoelectric elements 300 on the recognition line 110 are performed in the process of steps 1 to 8 described above. From the second recognition line 110, The steps 1 to 8 are repeatedly performed.

Therefore, when the user places the finger on the biometric information recognizing device, the biometric information recognizing device sets the signal generating device 311 in one row or a plurality of rows, sets and activates the signal receiving device 313, 300 to generate ultrasonic waves and receive reflected waves, and obtain biometric information such as a fingerprint image of the user using the received reflected wave signal.

6 shows a state where the piezoelectric elements 300 are arranged on the substrate 100 in the same manner as in FIG. 3, and the biometric information recognizing device includes the piezoelectric elements 300 arranged in a plurality of rows, The recognition line 110 is set as the recognition line.

6 shows one example in which three rows of piezoelectric elements 300 on the substrate 100 are recognized as one recognition row 110 and three rows of piezoelectric elements 300 are recognized as one recognition row . The biometric information recognizing device selectively activates the piezoelectric elements 300 on the recognition row 110 to progress biometric information scanning by the recognition row 110 as follows.

In the first step, the biometric information recognition device determines one or more of the plurality of piezoelectric elements 300 and sets it as the signal generating element 311. (Stage 1)

The biometric information recognizing device sets one or two or more of the piezoelectric elements 300 other than the previously set signal generating element 311 as the signal receiving element 313. In this case, (Step 2) When the signal generating element 311 is a specific one of the piezoelectric elements 300, the piezoelectric elements 300 existing around the signal generating element 311 are set as the signal receiving element 313 . 6, for example, six piezoelectric elements 300 around the signal generating element 311 on one recognition row 110 can be set as the signal receiving element 313.

Steps 3 and 4 are steps of activating the previously set signal generating element 311 and signal receiving element 313, respectively, so as to be driven according to respective functions. Specifically, the biological information recognition apparatus activates the signal generating element 311 to generate an ultrasonic signal, and activates the signal receiving element 313 to receive the reflected wave signal.

The bio-information recognition apparatus sets any one of the plurality of piezoelectric elements 300 adjacent to the signal generation element 311 as a new signal generation element 311. [ (Step 5) At this time, the new signal generating element 311 is selected among the piezoelectric elements 300 existing in proximity to the signal generating element 311 set in the first step. For example, in the new signal generating element 311 set in step 5, any one of the piezoelectric elements 300 existing in the left, right, or diagonal direction of the signal generating element 311 set in step 1 can be set .

On the other hand, the directionality of the signal generating element 311 newly set in step 5 is also related to the scanning direction. That is, when the newly set signal generating element 311 is set to the piezoelectric element 300 on the right side of the conventional signal generating element 311, the scanning direction becomes the right direction, and the newly set signal generating element 311 When the piezoelectric element 300 is set in the diagonal direction of the conventional signal generating element 311, the scanning direction becomes a diagonal direction.

Step 6 is a step of newly setting the signal receiving element 313 in accordance with the new signal generating element 311 set in step 5 of the biometric information recognizing apparatus. Step 6 proceeds in a manner similar to that in which the signal receiving element 313 is set in step 2. [

Finally, steps 7 and 8 are the steps of activating the newly set signal generating element 311 and the signal receiving element 313 to function as ultrasonic wave generating and reflected wave receiving, respectively.

FIG. 7 shows a state in which the piezoelectric elements 300 on the recognition row 110 are selectively activated according to the steps 1 to 8 shown above. The method of activating the piezoelectric element 300 according to the present invention is repeatedly performed in the steps 1 to 8. Therefore, when the user places the finger on the biometric information recognizing device, the biometric information recognizing device sets the signal generating device 311 in one row or a plurality of rows, sets and activates the signal receiving device 313, 300 to generate ultrasonic waves and to receive reflected waves, and obtain biometric information such as a fingerprint image of the user using the received reflected wave signal.

The biometric information recognizing device activates the piezoelectric elements with reference to FIGS. 2 to 7.

8 (a) shows a state in which a small number of piezoelectric elements are activated based on a pincushion point 200 on a substrate on which piezoelectric elements are arranged in a matrix form. 8A, the biometric information recognizing device activates the piezoelectric element corresponding to the pressing point 200 as a signal generating element and activates the piezoelectric elements around the signal generating element as a signal receiving element.

8 (b) shows a state where a small number of piezoelectric elements are activated based on a pincushion point 200 on a substrate on which piezoelectric elements are arranged as shown in FIG. As in the embodiment of FIG. 8 (b), the biometric information recognizing device also activates the piezoelectric element corresponding to the pincushion point 200 as a signal generating element and the surrounding piezoelectric elements as a signal receiving element .

9 and 10 show another embodiment for activating the piezoelectric elements with reference to the pawl point 200.

9 is a view showing a state in which a small number of piezoelectric elements are activated while changing positions based on a pincushion point 200 on a substrate on which piezoelectric elements are arranged in a matrix form, and FIG. 10 shows a state in which piezoelectric elements are arranged on a substrate It shows how it is activated. 9 and 10 are substantially the same as those described in Figs. 4 to 7 above.

On the other hand, the area of the piezoelectric elements to be activated based on the pressing point 200 is limited to the pressing area specified above.

11, the biometric information scanning method according to the present invention repeats the piezoelectric element activation process twice based on the pressure point 200 after the pressure area and the pressure point 200 are specified, The frequency magnitude of the ultrasonic waves generated during the activation process may be different.

That is, the biometric information recognizing device acquires the user fingerprint image in the pressing area in the first piezoelectric element activation process and acquires the user's finger vein or bone image in the second piezoelectric device activation process.

Meanwhile, although not shown in FIG. 1, the biometric information recognizing device can further perform the user authentication process using the acquired biometric information. For example, when the biometric information is a blood vessel image or a bone image, the biometric information recognizing device determines whether the user is correct by comparing the image with the previously stored image. On the other hand, the biometric information may be a plurality of blood vessel images according to time, and the biometric information recognition apparatus may determine whether the user fingerprint is a counterfeit fingerprint using the plurality of blood vessel images. That is, in the case of correct user fingerprint authentication, if the blood vessel image is acquired over time, the shape of the blood vessel is slightly different according to the expansion and contraction of the blood vessel. In the case of the biometric information recognition apparatus according to the present invention, And the like.

The biometric information recognizing apparatus and the biometric information recognizing apparatus according to the present invention have been described in the process of scanning the biometric information of the user.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It will be apparent to those skilled in the art that various modifications and variations can be made therein without departing from the spirit and scope of the invention. It will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the present invention.

100 substrate
110 recognition line 130 recognition column
200 point
300 Piezoelectric element 311 Signal generating element 313 Signal receiving element

Claims (9)

A method for a biometric information recognition device scanning biometric information of a user,
(a) detecting a pressure applied to a substrate and specifying a pressing region;
(b) generating a ultrasonic wave by activating the piezoelectric elements based on the position of the pressure point in the pressure area, and receiving the signal reflected by the user's living tissue; And
(c) acquiring biometric information based on a signal reflected by the user's biotissue;
Lt; / RTI >
The step of activating the piezoelectric elements in the step (b)
Setting a piezoelectric element corresponding to the position of the pressure point as a signal generating element;
Setting at least one piezoelectric element among the piezoelectric elements other than the signal generating element as a signal receiving element;
Generating an ultrasonic signal by activating the signal generating element; And
And activating the signal receiving element to receive a reflected wave signal reflected by the user's biotissue.
delete The method according to claim 1,
Wherein the piezoelectric elements are arranged in a matrix form having a plurality of rows and a plurality of rows on a substrate.
The method according to claim 1,
The piezoelectric elements are arranged in a plurality of rows, and the piezoelectric elements constituting an arbitrary row are arranged to be shifted from the piezoelectric elements constituting the preceding row of the arbitrary row or the piezoelectric elements constituting the succeeding row of the arbitrary row Wherein the biometric information scanning method comprises:
The method according to claim 1,
The step (a)
Wherein a position of a plurality of pressure points of the substrate area after the pressure applied on the substrate is sensed is determined and a pressing region on the substrate is specified based on the position of the detected plurality of points. Information scanning method.
6. The method of claim 5,
The step (a)
Wherein a position of a plurality of pressure points of the substrate area is detected by detecting an electric polarization on the piezoelectric element due to pressure applied on the substrate.
The method according to claim 1,
(D) activating the piezoelectric elements based on the position of the pressure point,
and generating an ultrasonic signal having a frequency different from that of the ultrasonic signal generated in the step (c).
8. The method of claim 7,
(E) receiving ultrasound signals generated in step (d) by receiving signals reflected by the blood vessels or bones of the user to acquire additional biometric information;
Wherein the biometric information scanning method further comprises the steps of:
Board;
A plurality of piezoelectric elements arranged on the substrate; And
A control unit;
, ≪ / RTI &
Wherein,
Specifying a pressing area on the substrate,
Specifying a pressure point in the pressure region,
The piezoelectric element corresponding to the position of the pressure point is set as a signal generating element,
Wherein at least one of the piezoelectric elements other than the signal generating element is set as a signal receiving element,
The signal generating element is activated to generate an ultrasonic signal,
Receiving the reflected wave signal reflected by the user's living tissue by activating the signal receiving element, and acquiring biometric information using the reflected ultrasonic signal.

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