KR20080095336A - User authentication device and door lock device with this user authentication device - Google Patents

Abstract

The present invention relates to a user authentication device having an improved structure and a door lock device including the user authentication device so that the front size can be easily reduced to a desired size as well as manufacturing cost is reduced and further convenience of use is enhanced. According to an aspect of the present invention, there is provided a user authentication apparatus for authenticating a user, the apparatus including: a contact member having a contact surface partitioned so that a user's finger is in contact and including a plurality of areas; A light source for irradiating light toward a fingerprint of a finger in contact with an area of the contact surface; An image sensor unit for detecting light reflected from the fingerprint of the finger so that an image of the finger fingerprint in contact with the area of the contact surface is obtained; An image determination unit that determines whether the image is similar to a preset reference image based on the acquired fingerprint image and outputs a determination signal corresponding to the determination result; A position sensor unit configured to output an area signal corresponding to a contact area where a finger contacts among a plurality of areas of the contact surface; And an authenticator configured to authenticate the user when a predetermined authentication condition is satisfied based on at least one of an area signal and a determination signal.

Description

Identifing device and door lock device having the same}

1 is a schematic front view of a door lock device according to a conventional example.

2 is a schematic front view of a door lock device according to an embodiment of the present invention.

3 is a schematic cross-sectional view taken along the line II-II of FIG. 2.

FIG. 4 is a schematic block diagram illustrating an authentication process of the door lock device shown in FIG. 2.

FIG. 5 is a schematic flowchart illustrating an authentication process of the door lock device shown in FIG. 2.

6 is a schematic front view of a door lock device according to another embodiment of the present invention.

FIG. 7 is a schematic cross-sectional view taken along the line VII-VII of FIG. 6.

FIG. 8 is a schematic block diagram illustrating an authentication process of the door lock device shown in FIG. 6.

FIG. 9 schematically illustrates a target image obtained in the door lock device shown in FIG. 6.

<Description of the symbols for the main parts of the drawings>

1 ... door 10 ... lock

20 ... Drive 30,30a ... Contact member

31.Contact face 32,32a ... Identifier

40.Light source 50,50a ... Image sensor

51, 51a ... Image Acquisition Unit 60, 60a ... Image Acquisition Unit

70 position sensor 75 position position

80.Certification Part 100,100a ... Door Lock Device

321 ... Identifier

The present invention relates to a user authentication device and a door lock device including the user authentication device, and more particularly, to a user authentication device for authenticating and deauthenticating a user according to a certain authentication condition, and a door lock device including the user authentication device. will be.

Recently, various electronic devices requiring authentication of a user, for example, a mobile phone, an automatic teller machine, a digital door lock device, and the like are widely used. For example, authenticate the person who entered the password set in the mobile phone so that only that person can use the mobile phone, or enter the passbook or card in the ATM, then enter the password or authenticated by fingerprint matching For example, the withdrawal can be withdrawn. A representative example of the electronic device through such user authentication is shown in FIG. 1.

As shown in FIG. 1, the door lock device 100 ′ is installed in the door 1 to lock and unlock the door, and to drive the clamp 10 'as a motor (not shown). A driving unit (not shown) including a), a user authentication device installed on an outdoor side of the door, and receiving an authentication command from a user to output an authentication signal for driving the clamp 10 ', and when satisfying an authentication condition. An authentication unit (not shown) for controlling the driving unit to be driven is provided. The user authentication device includes a keypad including a plurality of key buttons 30 ', and a fingerprint recognition unit 31' that recognizes a fingerprint of a finger when the user's finger contacts the user. Here, the keypad is configured to include numbers from 0 to 9 and 12 key buttons 30 'denoted by # and *. And, the authentication condition is that the key button 30 'corresponding to the preset password is sequentially pressed to enter the password, or it is determined that the fingerprint image recognized by the fingerprint recognition unit 31' is similar to the pre-registered reference image. If is satisfied.

In the door lock device 100 ′ configured as described above, when the user inputs a preset password or the user inputs an authentication command by touching a finger on the fingerprint recognition unit 31 ′, the authentication condition is satisfied as described above. Accordingly, the authentication unit outputs an authentication signal for driving the driving unit, thereby driving the driving unit. Thus, the catch 10'locks or unlocks the door.

By the way, in the door lock device 100 ′ configured as described above, the keypad and the fingerprint recognition unit 31 ′ are separately provided as user authentication devices, and in particular, the keypad includes 12 key buttons 30 ′. Since it is configured, there is a limit in reducing the front size of the door lock device 100 ', and furthermore, there is a problem that the manufacturing cost increases.

In addition, since the authentication conditions are set independently for each of the keypad and the fingerprint recognition unit 31 ', there is a problem that the security is weak. That is, when the password is known or the user's fingerprint is copied, the security of the door lock device 100 'cannot be secured.

The present invention has been made to solve the above problems, the object of the present invention is not only to easily reduce the front size to the desired size, but also to reduce the production cost and further improved user authentication device structure is enhanced to ease of use And a door lock device including the user authentication device.

In order to achieve the above object, the user authentication device according to the present invention, a user authentication device for authenticating a user, comprising: a contact member having a contact surface partitioned so that the user's fingers are in contact and comprises a plurality of areas; A light source for irradiating light toward a fingerprint of a finger in contact with an area of the contact surface; An image sensor unit detecting light reflected from the fingerprint of the finger such that an image of the fingerprint of the finger in contact with the area of the contact surface is obtained; An image determination unit that determines whether the image is similar to a preset reference image based on the acquired image of the fingerprint and outputs a determination signal corresponding to the determination result; A position sensor unit for outputting an area signal corresponding to a contact area where the finger contacts the plurality of areas of the contact surface; And an authentication unit configured to authenticate the user when a predetermined authentication condition is satisfied based on at least one signal of the area signal and the determination signal.

In addition, in order to achieve the above object, the user authentication device according to the present invention is a user authentication device for authenticating a user, the contact member having a contact surface which is partitioned so that the user's fingers are in contact and includes a plurality of areas. ; A light source for irradiating light toward a fingerprint of a finger in contact with an area of the contact surface; The light reflected from the finger fingerprint in contact with the contact surface and the light reflected from the rest of the contact surface except for the portion where the finger is in contact with each other are detected to include an image of the finger fingerprint and include a plurality of areas of the contact surface, respectively. An image sensor unit for obtaining a target image having a plurality of regions partitioned to correspond to each other; An image determination unit determining whether an image of a finger fingerprint included in the target image is similar to a preset reference image based on the obtained target image and outputting a determination signal corresponding to the determination result; A position determining unit for determining an area in which the image of the finger fingerprint is arranged among the plurality of areas of the target image based on the object image obtained from the image sensor unit and outputting an area signal corresponding to the area in which the fingerprint image is arranged. ; And an authentication unit configured to authenticate the user when a predetermined authentication condition is satisfied based on at least one signal of the area signal and the determination signal.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 is a schematic front view of a door lock device according to an embodiment of the present invention, FIG. 3 is a schematic cross-sectional view of the II-II line of FIG. 2, and FIG. 4 is a view illustrating an authentication process of the door lock device shown in FIG. 2. FIG. 5 is a schematic block diagram illustrating an authentication process of the door lock device shown in FIG. 2.

2 to 5, the door lock device 100 according to an embodiment of the present invention includes a clamp 10, a driving unit 20, and a user authentication device.

The catch 10 is installed in the door 1 and can be linearly moved in a direction protruding and immersing with respect to the door. When the clamp 10 is projected as shown in Fig. 2, the clamp is inserted into the clamp receiving hole 3 of the door holder 2 to lock the door 1. And when the clamp 10 is immersed, the clamp 10 will be separated from the clamping hole 3 of the door holder, and the locking of a door will be released.

The drive unit 20 drives the clamp 10 to move the clamp in a protruding and immersive direction. As is well known, the driving unit 20 is configured to include a motor (not shown) installed inside the door lock device 100 and a link member (not shown) for linearly driving the clamp 10 by receiving the rotational driving force of the motor. .

The user authentication device is installed in the housing 11 installed on the outdoor side of the door 1. The user authentication device receives an authentication command from the user and outputs an authentication signal so that the lock 10 is driven. The user authentication device includes a contact member 30, a light source 40, an image sensor unit 50, an image determination unit 60, a position sensor unit 70, and an authentication unit 80.

The contact member 30 is coupled to the front surface of the housing 11. The contact member 30 is formed with a contact surface 31 to which a user's finger can contact. Here, the contact surface 31 is divided into a plurality of areas, for example, 12 rectangular areas. An identification member 32 having the same area as that of the contact member 30 is attached to the contact member 30 on the lower surface of the contact member 30. The identification member 32 is marked with identifiers 321 respectively corresponding to the plurality of rectangular areas of the contact surface 31. Here, the plurality of identifiers 321 are indicated by numerals 0 through 9 and symbols of # and * at the corners of each of the twelve rectangular areas partitioned by the identification member 32. Each rectangular area partitioned by the identification member corresponds to an area partitioned on the contact surface and has the same area. In this embodiment, each rectangular area of the contact member is not shown, but is disposed below each rectangular area of the identification member, and the imaginary line shown in FIG. 2 shows that the area of the contact surface and the area of the identification member are 12 rectangular areas. It is shown virtually to mark it as partitioned. Therefore, below, when a finger touches the area | region of the contact surface in which an identifier, for example, "1" is seen, it is considered that a finger touches the area "1" of the contact surface. On the other hand, the contact member 30 and the identification member 32 is formed of a transparent material, for example glass, such that the identifier 321 is also visible through the contact member 30.

A pair of light sources 40 are disposed inside the housing 11. Each light source 40 irradiates light toward the back surface of the contact member 30. That is, each light source 40 irradiates light toward the fingerprint of the finger in contact with the area of the contact surface. Arrows shown in FIG. 3 represent light irradiated from the light source.

The image sensor unit 50 is for detecting light reflected from the fingerprint of the finger irradiated from each light source 40 and in contact with the contact surface 31 to obtain an image of the finger fingerprint. When the image sensor unit 50 detects the reflected light, the image sensor unit 50 outputs an electric signal corresponding to the detected reflected light to the image acquisition unit 51. Finally, the image acquisition unit 51 forms an image of a finger fingerprint from the electric signal. Obtain by The image acquisition unit 51 outputs an electrical signal corresponding to the image of the fingerprint to the image determination unit 60 which will be described later. On the other hand, as the image sensor unit 50, Charge Coupled Device (CCD) or Complementary Metal-Oxide-Semiconductor (CMOS) is generally used.

In addition, a plurality of optical lenses (not shown) may be installed between the contact member 30 and the image sensor unit 50. As such, when a plurality of optical lenses are installed, the image sensor unit 50 can more efficiently detect the light reflected from the fingerprint of the finger.

The image determination unit 60 outputs a determination signal based on the fingerprint image input from the image acquisition unit 51. First, the image determining unit 60 determines whether the fingerprint image is similar to the reference image, and outputs a similar determination signal in case of similarity, and outputs a dissimilarity determination signal in case of dissimilarity. Here, the reference image is a fingerprint image of a user's finger registered in advance, and may be a fingerprint image of any one of the user's fingers or all of the user's fingers, and is stored in a separate storage unit 61. In addition, the process of judging similarity between the fingerprint image and the reference image is a structure identification method for determining similarity with the reference image by extracting feature points from the fingerprint image, as is well known, and determining similarity by directly comparing the fingerprint image with the reference image. The pattern matching method is used.

The position sensor unit 70 outputs an area signal corresponding to a contact area where a finger touches among a plurality of areas of the contact surface. Therefore, when the user's finger touches an area of the contact surface where the identifier "8" is visible, for example, as shown in Figs. 2 and 3, an area signal corresponding to the "8" area is output. In the present embodiment, the position sensor unit 70, which is coupled to the contact member 30, measures a change in capacitance or pressure generated when a finger touches, as is widely known in the field of a touch screen. It is configured to include a film (not shown).

The authenticator 80 determines whether a predetermined authentication condition is satisfied based on at least one of an area signal and a determination signal input from the image determining unit 60 and the position sensor unit 70, and satisfies the authentication condition. Outputs an authentication signal to the driver 20 to drive the driver. The authentication condition may be set only by the determination signal, or only by the region signal, or by both the determination signal and the region signal, which will be described in detail below.

First, a case in which the authentication condition is satisfied by only the area signal corresponds to a case where a user's finger contacts each of a plurality of preset encryption areas among a plurality of areas of the contact surface to output an area signal corresponding to each encryption area. Specifically, if a four-digit password, for example, "3456" is set in advance, the password area is the area of the contact surface where the identifiers "3", "4", "5", and "6" are respectively shown. In this state, if the user's finger contacts the regions of the contact surface where the identifiers "3", "4", "5", and "6" are respectively visible or unordered, the "3" region and the "4" region Area signals corresponding to the " 5 " area and the &quot; 6 &quot; area are output. When the area signal is output as described above and input to the authentication unit 80, the authentication unit 80 determines that the authentication condition is satisfied, and outputs the authentication signal.

Next, the case where the authentication condition is satisfied only by the determination signal corresponds to a case where a similar determination signal is output from the image determining unit 60. Specifically, whether the user touches a finger on a plurality of areas of the contact surface or touches a finger on an area, if the at least one fingerprint image of the acquired fingerprint image is similar to the reference image, the image determining unit 60 outputs the similarity determination signal, and finally, the authentication unit 80 receiving the similarity determination signal determines that the authentication condition is satisfied, and outputs the authentication signal.

Lastly, when the authentication condition is satisfied by both the area signal and the determination signal, the user's finger contacts a specific area among a plurality of areas of the contact surface so that an area signal corresponding to the specific area is output and simultaneously touches the specific area. The image of the fingerprint thus obtained is similar to the reference image so that a similar determination signal corresponding thereto is output. Here, the specific area refers to any one of a plurality of crypto areas included in the preset password. Specifically, if a four-digit password, for example, "3456" is set in advance, the cipher area includes an area of the contact surface where the identifiers "3", "4", "5", and "6" are respectively shown. The specific area is any one of four cipher areas. In this state, if the user's finger touches the area of the contact surface where the identifiers "2", "4", "5", and "7" respectively show, respectively, sequentially or unordered, the area "2", the area "4" And region signals corresponding to regions "5" and "7" are output, and images of fingerprints contacting each of the four regions are obtained. At this time, the image of the fingerprints respectively obtained from the "2" area and the "4" area is similar to the reference image, and the image of the fingerprints respectively obtained from the "5" area and the "7" area is not similar to the reference image. The similarity determination signal is output together with the area signals corresponding to the "2" area and the "4" area, and the dissimilarity determination signal is output together with the area signals corresponding to the "5" area and the "7" area. That is, the area signal and the determination signal are output in pairs. When the authenticator 80 simultaneously receives an area signal corresponding to the area “4” and a similar determination signal for the fingerprint image obtained from the area “4”, the authentication unit 80 determines that the authentication condition is satisfied and outputs the authentication signal. do. Of course, when the authentication unit 80 determines whether the authentication condition is satisfied only by the determination signal, a pair of similar decision signals are output, so that the authentication conditions are satisfied and the authentication signal is output.

In addition, the case where the authentication condition is set to be satisfied when one area signal and a similar decision signal are input has been described above, but when two or more area signals and the similar decision signal are input, the authentication condition may be set to be satisfied. For example, similar to the above, a four-digit password, for example, a user's finger, for example, with "3456" set in advance, for example, identifiers "2", "4", "5", "7" If the respective areas of the contact surfaces shown are sequentially or unordered, the area signals corresponding to the "2", "4", "5", and "7" areas are output, and the four areas are in contact with each other. An image of the fingerprint is obtained. At this time, when the images of the fingerprints respectively obtained from the "2" area, the "4" area and the "5" area are similar to the reference image, and the images of the fingerprints respectively obtained from the "7" area are not similar to the reference image. The similarity determination signal is output together with the area signals corresponding to the "2" area, the "4" area and the "5" area, and the dissimilarity determination signal is output together with the area signal corresponding to the "7" area. As described above, the authenticator 80 may use the region signal corresponding to the "4" region and the similarity determination signal for the fingerprint image obtained from the "4" region, the region signal corresponding to the "5" region, and the "5" region. When the similarity determination signal for the obtained fingerprint image is input, two region signals and the likeness determination signal are inputted, and it is determined that the authentication condition is satisfied, so that the authentication signal is output from the authentication unit 80.

On the other hand, the authentication unit 80 controls the light source so that the light source irradiates light when the area signal of the position sensor unit 70 is input. Therefore, when the user's finger is in contact with the area of the contact surface, light is irradiated to obtain an image of the finger.

In the door lock device 100 configured as described above, an example of a process of unlocking the door will be described with reference to FIG. 5.

First, when the finger is in contact with the "3" region, the "4" region, the "5" region, and the "6" region of the area | region of the contact surface in the locked state (S100), the area signal corresponding to each of four area | regions Is output. At this time, it is determined whether the four areas in contact are the same as the area corresponding to each digit of the password (S110). If the password is "3456" and the area signals corresponding to "3", "4", "5" and "6" are set to be sequentially outputted, the authentication condition is set to be satisfied, the finger is placed in any of four areas. In operation S120, when the finger contacts the 3 "region, the" 4 "region, the" 5 "region, and the" 6 "region sequentially, the authentication condition is satisfied (S130) and the driving unit is driven (S140). ).

On the other hand, if the password is set to "3789" and the four areas where the finger touches are not the same as the areas corresponding to each digit of the password (S110), the area where the finger touches, that is, the "3" area, "4" It is determined whether at least one of the area, the "5" area and the "6" area is included in the area corresponding to each digit of the password, that is, the "3" area, the "7" area, the "8" area and the "9" area ( S200). When at least one of the areas where the finger is in contact is included in the area corresponding to the number of each digit of the password, it is determined whether the image of the fingerprint obtained from the finger in contact with the area "3" is similar to the reference image. (S300), If similar, it is determined that the authentication condition is satisfied (S130).

And, if the password is set to "1789", when determining in step S200 corresponds to the number of each digit of the password in the "3" area, "4" area, "5" area and "6" area where the finger touched Since the domain is not included, the authentication condition is not satisfied and it ends without the drive unit. Similarly, even when the password is set to "3789", if it is determined in step S300 that the image of the fingerprint obtained from the finger in contact with the area "3" is not similar to the reference image, it is determined that the authentication condition is not satisfied.

In addition, when the password is set to "3456" and the finger is in contact with the area "3", "4", "6" and "5" in sequence, step S300 as described above in step S200. The judgment process at

In the door lock device 100 configured as described above, simply bringing a finger into contact with the contact surface 31 of the contact member can generate an area signal corresponding to the area of the contact surface with which the finger contacts, as well as the contact surface 31. Since it is possible to obtain a fingerprint image of a finger in contact with, it is not necessary to dually configure a keypad for inputting a password and a fingerprint recognition unit for recognizing a fingerprint unlike conventional. Therefore, the size of the front surface of the door lock device 100 can be easily reduced to the desired size.

In addition, in the prior art, if the wrong password was entered incorrectly on the keypad, the door could not be released and the password had to be input again. However, in the present embodiment, the area corresponding to the number of each digit of the password is satisfied in order to satisfy the authentication condition. Even if a finger accidentally touches another area in the process of touching a finger, the finger touches exactly one of the digits in each digit of the password, and the fingerprint of the finger touching the area is similar to the reference image. If only, the authentication condition is satisfied, the door can be unlocked. Therefore, the ease of use of the door lock device 100 is enhanced.

And, in order to increase the security of the door lock device by configuring both the password input and fingerprint authentication, in the conventional door lock device, after the user enters the number corresponding to the password on the keypad, the user must touch the finger to the fingerprint recognition unit There was inconvenience in using it. However, in the present embodiment, fingerprint recognition is simultaneously performed only by touching a finger to an area corresponding to each number of the password among the plurality of areas of the contact surface 31, thereby improving convenience in use.

FIG. 6 is a schematic front view of the door lock device according to another embodiment of the present invention, FIG. 7 is a schematic cross-sectional view of the X-ray line of FIG. 6, and FIG. 8 illustrates the authentication process of the door lock device shown in FIG. 6. 9 is a schematic block diagram of FIG. 9 schematically shows a target image obtained in the door lock device shown in FIG. 6. The same reference numerals are used to designate the same components as those of an embodiment of the present invention, but the corresponding components are indicated by adding 'a' to corresponding components. Since the description is duplicated, it will be omitted and only the other parts will be described.

6 to 9, unlike the door lock device 100 described with reference to FIGS. 2 to 5 in the door lock device 100a according to the present embodiment, the position sensor part 70 is not provided and the position determination part ( 75), the process of outputting the area signal is different, and will be described below.

First, in the door lock apparatus of this embodiment, the contact surface 31 of the contact member 30a is divided into four rectangular areas. The identification member 32a is also divided into four rectangular areas in the same manner as the contact surface 31, and at the corners of each rectangular area, the identifier 31a, for example, the direction indicating east, west, south The letters "and" North "are displayed.

The image sensor unit 50a detects both the light reflected from the fingerprint of the finger irradiated from each light source 40 and in contact with the region of the contact surface 31 and the light reflected from the region other than the region in which the finger is in contact. That is, the image sensor unit 50a detects both the light reflected from the fingerprint and the light reflected from portions other than the fingerprint among the contact surfaces. When the image sensor unit 50a detects the reflected light as described above, the electric signal corresponding to the detected reflected light, that is, the electric signal corresponding to the light reflected from the fingerprint of the finger and the area reflected from the area other than the contact area of the finger are reflected. An electrical signal corresponding to light is output. The image acquisition unit 51a forms and acquires a target image by using an electric signal output from the image sensor unit 50a. Here, as shown in FIG. 9, the target image 94 has four regions each corresponding to four regions of the contact surface, and includes an image 95 of a finger fingerprint.

The image determining unit 60a determines whether the image of the finger fingerprint included in the obtained target image is similar to the reference image, and outputs a similar decision signal or a dissimilar decision signal according to the determination result.

The position determining unit 75 determines an area where the fingerprint image is located among the four areas of the target image based on the obtained target image and outputs an area signal corresponding to the area where the fingerprint image is placed. For example, when the target image 94 as shown in FIG. 9 is obtained, the position determining unit 75 is located in an area where the fingerprint image 95 is divided into “east” of four areas of the contact surface. Detects the signal and outputs an area signal corresponding to the area partitioned by "dong".

On the other hand, also in this embodiment, when the contact member 30a is pressed by a finger, it is comprised so that the light source 40 may irradiate light. That is, as shown in FIG. 7, a printed circuit board 93 provided with a contact terminal 92 and a dome switch 91 is provided, and the contact member 30a is approached and spaced apart from the door 1. When the contact member 30a is pressurized while being installed to be movable, the dome switch 91 comes into contact with the contact terminal 92 because the contact member moves in a direction approaching the door, so that the printed circuit board 93 ) Outputs an electrical signal to the authenticator 80a. Therefore, the authenticator 80a controls the light source 40 to irradiate the light with the light source based on the electric signal input when the contact member 30a is pressed.

In the present embodiment, the user authentication device is configured to be provided in the door lock device, but the user authentication device may be configured to be provided in various devices requiring user authentication, for example, a mobile phone, a cash dispenser, a commute recorder, and the like. have.

As mentioned above, the present invention has been described in detail with reference to preferred embodiments, but the present invention is not limited to the above embodiments, and various modifications may be made by those skilled in the art within the technical idea of the present invention. It is obvious.

According to the present invention having the above-described configuration, not only can easily reduce the front size of the user authentication device to the desired size, but also the manufacturing cost is reduced and further convenience for use is enhanced.

Claims (6)

In the user authentication device for authenticating a user, A contact member having a contact surface contacted by the user's finger and partitioned to include a plurality of regions; A light source for irradiating light toward a fingerprint of a finger in contact with an area of the contact surface; An image sensor unit detecting light reflected from the fingerprint of the finger such that an image of the fingerprint of the finger in contact with the area of the contact surface is obtained; An image determination unit that determines whether the image is similar to a preset reference image based on the obtained image of the fingerprint and outputs a determination signal corresponding to the determination result; A position sensor unit for outputting an area signal corresponding to a contact area where the finger contacts the plurality of areas of the contact surface; And And an authenticator configured to authenticate the user when a predetermined authentication condition is satisfied based on at least one of the area signal and the determination signal. In the user authentication device for authenticating a user, A contact member having a contact surface contacted by the user's finger and partitioned to include a plurality of regions; A light source for irradiating light toward a fingerprint of a finger in contact with an area of the contact surface; The light reflected from the finger fingerprint in contact with the contact surface and the light reflected from the rest of the contact surface except for the portion where the finger is in contact with each other are detected to include an image of the finger fingerprint and include a plurality of areas of the contact surface, respectively. An image sensor unit for obtaining a target image having a plurality of regions partitioned to correspond to each other; An image determination unit determining whether an image of a finger fingerprint included in the target image is similar to a preset reference image based on the obtained target image and outputting a determination signal corresponding to the determination result; A position determining unit for determining an area in which the image of the finger fingerprint is arranged among the plurality of areas of the target image based on the object image obtained from the image sensor unit and outputting an area signal corresponding to the area in which the fingerprint image is arranged. ; And And an authenticator configured to authenticate the user when a predetermined authentication condition is satisfied based on at least one of the area signal and the determination signal. The method according to claim 1 or 2, The authentication condition may include a case in which the user's finger contacts each of a plurality of preset encryption areas among the plurality of areas of the contact surface to output the area signal corresponding to each of the encrypted areas, or the obtained image of the fingerprint is displayed. The user authentication device, characterized in that it is satisfied when the determination signal corresponding to the reference image is output. The method according to claim 1 or 2, The authentication condition is a region in which the user's finger is in contact with a specific region among a plurality of regions of the contact surface, wherein the specific region is any one of a plurality of cipher regions included in a preset password and corresponds to the specific region. And a signal is output and is satisfied when an image of the fingerprint obtained by contacting the specific area is similar to the reference image and a corresponding determination signal is output. The method according to claim 1 or 2, The contact member is coupled with an identification member marked with an identifier corresponding to each of the plurality of regions of the contact surface, The authentication unit, the user authentication device, characterized in that for controlling the light source so that the light source irradiates the light when the user's finger contacts the contact surface. A fastener installed in the door to lock and unlock the door; A drive unit for driving the clamp so that the door is locked and unlocked; And And the user authentication device according to claim 1 or 2, And the authentication signal output from the authentication unit of the user authentication device is output to the drive unit when the user is authenticated by the user authentication device to drive the drive unit.

Images