KR102087440B1 - Mobile Fingerprint Input Apparatus, Entrance Control System Comprising the Fingerprint Input Apparatus and Control Method thereof - Google Patents

Abstract

Disclosed are an access control system and a control method including a portable optical fingerprint input device and a fingerprint input device for performing access authentication. The access control system of the present invention includes a fingerprint input device that can be connected to a mobile terminal, and the access controller for controlling the door lock does not have a fingerprint input means. Although the fingerprint input device minimizes the size by using a flat optical refractor, the fingerprint input device has all the components necessary for optical fingerprint authentication and strengthens the personal information security by storing the template of the fingerprint registered in the internal memory.

Description

Mobile Fingerprint Input Apparatus, Entrance Control System Comprising the Fingerprint Input Apparatus and Control Method

The present invention is connected to a user's mobile terminal, such as a smart phone or tablet, and a small portable optical fingerprint input device with enhanced security, and an access control system and control method for performing access authentication with the fingerprint input device It is about.

The access control system is installed at the door and authenticates the person, and includes an access authentication means and an electric door lock. The door lock is inserted into the door to open and close the door. For example, a dead bolt is inserted into a groove installed in the door, or the door is opened or closed by pulling an iron plate installed on the door with an electromagnet. Conventionally, the access authentication means used in the access control system used a keypad for inputting a password, a magnetic card, an RFID tag and a fingerprint input device.

Among them, fingerprint recognition is still widely used and the most generalized authentication means compared to other means because it presents a simple structure and a counterfeit fingerprint defense function. A popular method of acquiring fingerprint information is an optical method using an optical refractor such as a prism.

In the conventional optical fingerprint input device, as shown in FIG. 1, an image of a light source 1 for irradiating fingerprint recognition light, a prism 3 with which a finger contacts, and a fingerprint image emitted from the prism 3 are formed. Lens 4 and an image sensor 5 for converting the fingerprint image formed on the lens 4 into an electrical signal. The optical fingerprint input device includes a scattering device and an absorption device according to the arrangement of the prism 3 and the light source 1.

The light emitted from the light source 1 is imaged in the fingerprint pattern while being reflected, absorbed or scattered from the valleys and ridges of the fingerprint incident on the prism 3 and contacting the fingerprint contact surface 3a of the prism 3. It exits again through the exit surface 3b of (). The fingerprint image emitted from the prism 3 is imaged on the image sensor 5 through the lens 4 to generate a digital fingerprint image.

Since optical fingerprint authentication uses an optical refractor, it is recognized that there is a limit in miniaturization. Since the prism 3 has a triangular cross section and changes the optical path to a certain angle or more, the fingerprint input device using the prism 3 has a larger volume than the semiconductor type or the like by any method. to be.

On the other hand, the applicant has registered a patent for the invention (Korean Patent No.1493332, 1479609) relating to the fingerprint recognition device of the external type to the mobile terminal. The external fingerprint recognition device according to the present invention is a fingerprint recognition device using a light and a camera built in a mobile terminal instead of an optical refractor and a lens, instead of a light and an image sensor. Since part of the configuration of the fingerprint recognition device uses a mobile terminal, the external fingerprint recognition device can be miniaturized.

In addition, the fingerprint input means applied to the access control system is built in the access controller. This is because the access controller is installed in the door, which is effective to control the access of several persons. If an individual carries a fingerprint input device for himself, a different approach may be necessary.

[Related Technical Documents]

1. Fingerprint input device using mobile terminal equipped with camera and external optical device for fingerprint input thereof (Korean Registered Patent Nos.1493332, 1479609)

SUMMARY OF THE INVENTION An object of the present invention is to provide a small portable optical fingerprint input device which is connected to a mobile terminal of a user such as a tablet and has enhanced security.

Another object of the present invention is to provide an access control system and an access control method for performing access authentication using a fingerprint input device and a mobile terminal.

An access control system according to the present invention for achieving the above object includes an access controller, a fingerprint input device and a mobile terminal. The door controller controls the door lock to open the door upon receiving the door open command. The fingerprint input device is a portable device which is connected to the mobile terminal via a cable and is supplied with power. When the fingerprint input device receives an authentication start command from the mobile terminal, the fingerprint input device is optically inputted to perform fingerprint authentication and notify the mobile terminal of the authentication result. . The mobile terminal transmits the authentication start command to the fingerprint input device under the control of the person, and if the authentication success of the fingerprint input device is confirmed, the mobile terminal provides the door open command to the access controller.

According to an embodiment, a fingerprint input device may include an optical unit including an optical refractor and a light source to generate and output a fingerprint image of a fingerprint in contact with a fingerprint contact surface of the optical refractor; And a circuit unit configured to receive a fingerprint image from the optical unit, generate a fingerprint image, and perform accessor authentication. Here, the circuit unit includes an image sensor, a memory, a communication interface, and a controller. The image sensor receives a fingerprint image from the optical unit to generate a fingerprint image, and the fingerprint templates of a plurality of registered fingerprints are stored in the memory. The communication interface communicates with the mobile terminal by wire and receives power from the mobile terminal. The control unit operates the optical unit according to an authentication request for an accessor of the mobile terminal, performs authentication by comparing a fingerprint image generated by the image sensor with a template of an accessor registered in the memory, and authenticates the mobile terminal. Notify the results.

According to another embodiment, the optical unit includes a flat optical refractor, a lens, and a first mirror. The optical refraction apparatus includes a fingerprint contact surface in which light of the light source is converted into a fingerprint image, a light incident surface parallel to the fingerprint contact surface, and a light incident surface in which light emitted from the light source is incident and totally reflects the fingerprint image converted in the fingerprint contact surface, and the fingerprint contact surface. An emission surface disposed between the light incidence surfaces and the fingerprint image on which the fingerprint image is output, and a rear surface inclined to face the emission surface and form an interior angle with the light incidence surface. Here, the inside angle is preferably set to an angle that allows the back surface to totally reflect the fingerprint image totally reflected from the light incident surface toward the exit surface.

A lens is provided between the exit surface and the image sensor to form the fingerprint image with the image sensor, and the first mirror is disposed between the lens and the image sensor so that the image sensor can be disposed in parallel with the fingerprint contact surface. The fingerprint image passing through the lens is reflected to the image sensor.

According to another embodiment, the plurality of light sources, using a blue, green or red LED is exposed to the color through the fingerprint contact surface, when the power is supplied through the communication interface to start the operation, from the mobile terminal When the user receives the authentication start command and receives the fingerprint, and when the authentication is performed according to the authentication start command to determine whether the authentication succeeds or fails, the at least one time point is turned on and off in a specific pattern. Can be marked.

According to another embodiment, the door opening command provided by the mobile terminal to the access controller includes a first identification code for identifying the person and a second identification code for identifying the access controller. In addition, the mobile terminal may receive the access information for confirming the first identification code and the information for confirming the second identification code when receiving a control command from the access person.

The present invention also extends to the access control method of the access control system. Access control method of the present invention, the mobile terminal is connected to the fingerprint input device and the cable to supply power; Transmitting, by the mobile terminal, an authentication start command to the fingerprint input device according to an accessor's control; In response to the fingerprint input device optically receiving an entrance fingerprint according to the authentication start command, performing an entrance authentication and notifying the mobile terminal of the authentication result; Providing, by the mobile terminal, a door opening command to the access controller when the authentication of the fingerprint input device is confirmed to be successful; And controlling the door lock to open the door according to the door opening command.

Fingerprint input device of the present invention is easy to carry the user by minimizing the overall size and thickness by using a flat-shaped optical refractor, fingerprint registration, fingerprint authentication only when receiving a predetermined control command connected to a mobile terminal such as a user's tablet Security is enhanced by performing

The fingerprint input device of the present invention can obtain a fingerprint image having a size sufficient to secure a feature point by maximizing the fingerprint input surface even though the overall size is reduced.

In addition, even though the fingerprint input device of the present invention is reduced in size, all the components necessary for optical fingerprint authentication are built in such that information or images related to the input fingerprint are not leaked to the outside during the fingerprint registration or authentication process. The fingerprint template is encrypted and stored in internal memory for enhanced security.

The access control apparatus of the present invention does not need to have a user interface such as a keypad for controlling the door lock, and may be embedded in the door together with the door lock as needed.

If the user has already provided the mobile terminal and the door lock, it is possible to build the access control system of the present invention by installing only the fingerprint input device and the access controller of the present invention. Therefore, the user can build the system very economically.

Further, by using a combination of the mobile terminal and the fingerprint input device, the fingerprint input device does not have to be limited to the dedicated configuration of the access control system of the present invention. By adding various software requiring personal authentication to a mobile terminal, the fingerprint input device of the present invention can be used as a general personal authentication device.

1 is a conceptual diagram provided to explain a conventional optical fingerprint input method;
2 is a block diagram of an access control system of the present invention;
3 is a block diagram of an access controller and a mobile terminal of FIG.
4 is a perspective view of a fingerprint input device of the present invention;
5 is a block diagram of a fingerprint input device of the present invention;
6 is a cross-sectional view provided for explaining a fingerprint image generation process of the fingerprint input device of the present invention;
7 is a flowchart provided in the description of the access control method of the access control system of the present invention, and
8 is a block diagram of an access control system according to another embodiment of the present invention.

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

Referring to FIG. 2, the access control system 200 according to an embodiment of the present invention includes an access controller 210 for controlling the door lock 10, a mobile terminal 230, and a fingerprint input device 250. The door 11 is opened and closed by controlling the door lock 10 installed at the door 11. When authentication is performed on the person who wants to open the door 11 by the mobile terminal 230 and the fingerprint input device 250, the access controller 210 and the door lock 10 open the door according to the access authentication result. .

For access control, in the present invention ⓐ door opening and closing is performed by the door lock 10, ⓑ accessor authentication is performed by the mobile terminal 230 and the fingerprint input device 250. Ⓒ The access controller 210 has a structure for controlling the door lock 10 according to the 'door access command' or 'authentication code' provided by the mobile terminal 230. According to an embodiment, the door lock 10 and the access controller 210 may be combined into one device.

Referring to FIG. 3, the access controller 210 includes a second communication interface 211 and a door lock driver 213 and is connected to the door lock 10 by wire or integrally formed with the door lock 10. When the access controller 210 receives a 'door access command' from the mobile terminal 230 (or confirms that accessor authentication is completed in a corresponding method), the door controller 10 controls the door lock 10 to open the door 11.

In the present invention, the access controller 210 is not required to have a separate access authentication means, the access controller 210 of Figure 3 does not have a user interface such as a keypad (keypad) or a display (not shown) . However, the access controller 210 may include a separate access authentication means, or a user interface for another purpose.

The second communication interface 211 receives a 'door access command' from the mobile terminal 230. In the present invention, the door opening command has the same meaning as the accessor authentication success. Here, the second communication interface 211 of the access controller 210 may correspond to a wireless LAN, a Bluetooth, a mobile communication network, a Zigbee, and the like.

When the door lock driving unit 213 receives an 'open command' from the mobile terminal 230 through the second communication interface 211, it is determined that the accessor authentication is successful and controls the door lock 10 so that the door 11 is opened. . In general, the door lock driving unit 213 controls the door lock 10 by sending an electric signal to the door lock 10 in a contact control form. The door lock 10 installed in the door 11 opens the door 11 when receiving the contact signal from the access controller 210.

The door lock 10 controlled by the access controller 210 is an electric door lock. For example, a motor (not shown) may be used to drive a dead bolt (not shown), or an electromagnet may be used to open and close the door 11 by itself. It works in such a way.

In order to improve security, the purpose of mutual recognition of the access controller 210 and the mobile terminal 230 or the access controller 210 and the fingerprint between the access controller 210 and the mobile terminal 230, separately from the accessor authentication. The exchange of a predetermined and encrypted registration key may be preceded by the purpose of mutually recognizing the input device 250. Even after the access controller 210 and the mobile terminal 230 are interconnected, the information exchanged by the access controller 210 and the mobile terminal 230 may be encrypted with a separate encryption code, including an 'open command'.

The mobile terminal 230 is a portable terminal having a communication function such as a smart phone, a personal digital assistant (PDA), a tablet computer (or a tablet), and various functions (telephone function, Camera functions, location recognition, etc.). However, a configuration which is not essential to the description of the present invention among these configurations is not shown in the drawings or described.

In order to perform the characteristic authentication process of the present invention, the mobile terminal 230 provides a user interface for the fingerprint input device 250 and serves as a repeater for connecting to the access controller 210 or an external server as necessary. .

As the mobile terminal 230 is used, the fingerprint input apparatus 250 may be further miniaturized, and the fingerprint input apparatus 250 may be further installed in a manner of additionally installing software for other purposes in the mobile terminal 230. Can be used as Therefore, the user can use the fingerprint input device 250 as a general-purpose personal authentication device rather than a dedicated configuration of the access control system 200.

Referring to FIG. 3, the mobile terminal 230 may include a display unit 231, an input unit 233, a first communication interface 235, a first communication interface 237, and a second communication interface 237. Terminal control unit 239 is included.

The display unit 231 is a device for displaying various types of information such as LCD, OLED, etc. so as to be visually recognized, and the input unit 233 is a device for receiving a user's control command. In general, the display unit 231 and the input unit 233 are preferably provided in the form of one touch screen.

The 1a communication interface 235 is a communication interface connected to the 2a communication interface 211 of the access controller 210. According to a communication method, a wireless LAN, a Bluetooth, a mobile communication network, and a Zigbee Corresponds to a wireless interface.

The first b communication interface 237 is a communication interface connected to the third a communication interface 437 of the fingerprint input device 250. The first bb communication interface 237 preferably uses a wired interface such as a universal serial bus (USB) or RS-232, but is not limited thereto.

The terminal controller 239 controls the overall operation of the mobile terminal 230, and specifically includes an access controller 239a to perform the access authentication of the present invention.

The access control unit 239a controls accessor registration and fingerprint registration for accessor registration, and performs access control based on accessor registration.

When the access control unit 239a receives a control command for opening the door from the user (ie, the accessor) through the input unit 233, the access control unit 239a transmits a 'authentication start command' to the fingerprint input device 250, and the fingerprint input device 250. When the accessor authentication success is received from the access controller 210 transmits an 'access door opening command'. The access door opening command may include a first identification code for identifying an accessor and a second identification code for identifying the access controller 210. In this case, since the access controller 210 is registered to access the accessor, the first identification code and the second identification code are associated with each other.

The operation of the mobile terminal 230 centering on the operation of the access control unit 239a will be described again with reference to FIG. 7 below.

4 to 6, the fingerprint input device 250 of the present invention obtains a fingerprint image from a user fingerprint in contact with the fingerprint contact surface 411a and registers it as a template, and then registers a fingerprint for the registered user when personal authentication is required. Perform authentication. The fingerprint input device 250 may be connected to the mobile terminal 230, and performs fingerprint registration, fingerprint authentication (participant authentication), etc. under the control of the mobile terminal 230.

The fingerprint input device 250 of the present invention includes an optical unit 410, a circuit unit 430, and a housing 450 to accommodate them. Referring to FIG. 4, the housing 450 has a fingerprint contact window 451 formed at an upper surface thereof for the user to input a fingerprint, and the connection terminal 437a of the third communication interface 437 described below is exposed. It is a flat shape that is slightly bigger than the finger.

Since the size of the fingerprint contact window 451 is smaller than the fingerprint contact surface 411a of the optical refraction machine 411 described below, the area of the fingerprint input at one time by the fingerprint contact window 451 is determined. It should be approximately 15 x 20mm in size for full access verification. When the communication cable 30 is connected between the connection terminal 437a and the mobile terminal 230 so that the fingerprint input device 250 is connected to the mobile terminal 230, the fingerprint input device 250 is supplied with operating power. .

Referring to FIG. 5, the optical unit 410 includes the optical refractor 411, the lens 413, and the first mirror 415, and the user who contacts the fingerprint contact surface 411a of the optical refractor 411. A fingerprint image is made by irradiating light toward a fingerprint. The fingerprint image generated by the optical unit 410 is inputted to the image sensor 433 of the circuit unit 430 to be imaged.

The optical refractor 411 may be any kind of optical element including a fingerprint contact surface to which the finger F contacts, a light entrance surface to which light emitted from the light source 431 is incident, and an exit surface to which the fingerprint image is finally emitted. Do. However, when the optical refractor 411 is implemented in a thin flat plate shape, the fingerprint input device 250 may be sufficiently thin in a plate shape. The size of the fingerprint contact surface of the optical refractor 411 may correspond to or be larger than the fingerprint contact window 451. In addition, for sufficient accessor authentication, the fingerprint contact surface should preferably have a size of approximately 15 x 20 mm or more.

The optical refractor 411 of FIG. 6 is an example of the optical refractor of the present invention. In the optical refractor 411 of FIG. 6, the fingerprint contact surface 411a is disposed on the 'upper surface', and the emission surface 411b is disposed on the 'front' perpendicular to the fingerprint contact surface 411a, and the light incident surface is disposed on the lower surface. It is a board | substrate shape in which 411c was arrange | positioned. The back surface 411d facing the exit surface 411b forms a light incident surface 411c and a cabinet a having a predetermined size. The arrangement of the interior a is to totally reflect the path of the fingerprint image totally reflected in the optical refractor 411 to the exit surface 411b and reduce trapezoidal distortion as shown in FIG. 6. The path of the fingerprint image in the photorefractor 411 will be described again with reference to the light source 431 below.

The lens 413 forms a fingerprint image from the exit surface of the optical refractor 411 on the image sensor 433. The first mirror 415 is disposed on the optical path between the lens 413 and the image sensor 433 to change the path of the fingerprint image emitted from the optical refractor 411 by a constant angle (for example, 90 °). The 433 can be arranged in parallel with the optical refraction machine 411, so that the fingerprint input device 250 can be sufficiently flat and thin.

The lens 413 and the first mirror 415 form an optical path between the emission surface 411b of the optical refractor 411 and the image sensor 433, thereby providing a fingerprint image emitted from the optical refractor 411. Light) is incident on the image sensor 433. Although FIG. 6 shows the lens 413 disposed in front of the first mirror 415, this arrangement is, of course, illustrative, and additional mirrors may be placed before or after the lens 413, for example. A plurality of lenses 413 may also be used as necessary.

On the other hand, the lens 413 is a concave-convex lens having an incident surface of a concave lens and an exit surface of a convex lens. Correct trapezoidal distortion. Referring to FIG. 6, since the path length of the fingerprint image from the fingerprint contact surface 411a to the lens 413 is different at the first point (), the second point (), and the third point (), the fingerprint image has a path length. Due to the difference in trapezoidal distortion. In the present invention, the rear surface 411d of the optical refractor 411 facing the exit surface 411b is formed to be inclined at an internal angle a that is not perpendicular to the light incident surface 411c, thereby at different points (). Reduces the difference in path lengths of fingerprint images. Additionally. A concave-convex lens 413 corrects trapezoidal distortion of the fingerprint image.

The circuit unit 430 includes a light source 431, an image sensor 433, a memory 435, a third a communication interface 437, and an authentication controller 439. Since the fingerprint input device 250 receives power from the mobile terminal 230, the fingerprint input device 250 does not need to include a battery or a power supply. The circuit unit 430 is disposed in parallel with the light incidence surface 411c under the light incidence surface 411c of the plate-shaped optical refractor 411, thereby miniaturizing and optimizing the size of the fingerprint input device 250.

The light source 431 irradiates light for generating an optical fingerprint image toward the fingerprint contact surface 411a of the optical refractor 411. Since the light source 431 is disposed to face the light incident surface 411c of the light refractor 411, the light emitted from the light source 431 is incident directly on the light incident surface 411c of the light refractor 411. do.

In consideration of the thickness of the fingerprint input device 250, as shown in FIG. 6, since the thickness of the optical refractor 411 is thin and the light source 431 is disposed near the light incident surface 411c, the angle of view of the light source 431 Despite this, the area that the light source 431 can illuminate is limited. Accordingly, the present invention arranges the plurality of light sources 431 at regular intervals, thereby illuminating the fingerprint contact surface 411a uniformly.

By arranging the optical refractor 411 and the light source 431, the fingerprint input device 250 of FIG. 6 generates a fingerprint image in a transmissive (ie, scattering) manner. In FIG. 6, light emitted from the light source 431 is incident perpendicularly to the light incident surface 411c. Since the light passing through the light incident surface 411c is incident on the fingerprint contact surface 411a of the optical refractor 411 at an angle smaller than the critical angle, the fingerprint image is scattered at the ridge portion of the fingerprint in contact with the fingerprint contact surface 411a. Mainly formed by the light, the valleys are dark and the ridges are bright, resulting in a good contrast. The light arriving at the fingerprint contact surface 411a is scattered or reflected from the fingerprint contact surface 411a to become a fingerprint image, and is totally reflected on the light incident surface 411c and the back surface 411d of the optical refraction 411. At this time, the light incident surface 411c and the back surface 411d should form an internal angle a so that the fingerprint image can be totally totally reflected toward the exit surface 411b. The fingerprint image emitted from the exit surface 411b is collected through the lens 413, reflected by the first mirror 415, and incident on the image sensor 433.

The image sensor 433 receives a fingerprint image, generates a fingerprint image, provides the fingerprint image to the authentication controller 439, and stores the fingerprint image in the memory 435. Since the image sensor 433 is disposed in a state of being rotated by 90 ° with respect to the emission surface 411b, a first mirror 415 is required between the emission surface 411b and the image sensor 433. Through the fingerprint input device 250 can be miniaturized.

The fingerprint input device 250 of FIG. 5 does not have a separate user interface to display an operation state to the user. However, in order to display the basic operation state, the fingerprint input device 250 may display the operation state using a blue, red, or green LED as the light source 431. When the light source 431 is turned on for the fingerprint input, the color is reflected through the optical refractor 411 and the fingerprint contact window 451, so that the user can know that the fingerprint input device 250 is in an operating state. Further, when power is supplied through the 3a communication interface 437 to start an operation, when a fingerprint registration command or an authentication start command is received from the mobile terminal 230 and a fingerprint is input, the fingerprint registration command is received. When the fingerprint registration is completed, and at least one time point selected from among when the authentication is successful or the authentication is failed by performing authentication according to the 'authentication start command', the authentication control unit 439 has a blue, red or green color. By turning on and off the light source 431 in a predetermined specific pattern, the operation state can be displayed without providing a separate display unit. However, according to an exemplary embodiment, the fingerprint input device 250 may include at least one LED for displaying the basic operation.

The memory 435 stores a fingerprint image generated by the image sensor 433, a template (feature point data) and authentication history information of a fingerprint registered through a fingerprint registration process, and the fingerprint input device 250 of the present invention. Various information of is stored. The enrolled fingerprint template and / or fingerprint image stored in the memory 435 are stored to be classified and searched by a certain serial number or the like. Data stored in the memory 435 is preferably encrypted by the authentication control unit 439.

The third a communication interface 437 is connected to the first b communication interface 237 of the mobile terminal 230, and receives power as well as transmitting and receiving data. For example, the UASB or the RS-232 or the like is preferably the 3a communication interface 437 or the like as the 3a communication interface 437. When using a wired interface, the third a communication interface 437 includes a connection terminal 437a exposed at one side of the housing 450.

The authentication controller 439 controls the overall operation of the fingerprint input device 250 of the present invention. The authentication controller 439 first performs an accessor fingerprint registration and an accessor authentication process under the control of the mobile terminal 230, and provides the result to the mobile terminal 230.

Meanwhile, since the fingerprint input device 250 and the mobile terminal 230 are interconnected through the 3a communication interface 437 and the 1b communication interface 237, the authentication control unit 439 and the mobile terminal 230 will be described below. Although described as if there is a direct communication between, it should be understood that it is transmitted and received by the 3a communication interface 437 and the 1b communication interface 237.

Fingerprint registration

Enrollment fingerprint registration is performed in the enrollment process of the mobile terminal 230, it is initiated by the request of the mobile terminal 230. When the authentication controller 439 receives the fingerprint registration command from the access controller 239a of the mobile terminal 230, the authentication controller 439 turns on the light source 431 to start the fingerprint registration process. At this time, the fingerprint registration command of the mobile terminal 230 includes a 'first identification code' assigned to the person to be registered.

When a fingerprint is input and the light emitted from the light source 431 is changed into a fingerprint image and output through the emission surface 411b, the image sensor 433 converts the fingerprint image into a digital fingerprint image. The authentication control unit 439 checks the quality of the fingerprint image and determines whether the fingerprint image is a fake fingerprint. If there is no problem with the quality check and is not a fake fingerprint, the authentication controller 439 extracts the feature points from the fingerprint image, generates a fingerprint template, and then maps the 'first identification code' included in the fingerprint registration command to the memory 435. Save it. The authentication control unit 439 notifies the mobile terminal 230 of the fingerprint registration completion according to the fingerprint registration command together with the storage of the fingerprint template, thereby completing fingerprint registration for the accessor initiated by the fingerprint registration command. In the process of storing in the memory 435, the authentication control unit 439 may encrypt and store the fingerprint template with a certain encryption code.

If the quality of the fingerprint image is poor or is determined to be a fake fingerprint, the authentication controller 439 may provide the error information to the mobile terminal 230 or display it to the accessor, and both provide the error information and display the accessor. It can also be done. In the fingerprint registration process, it is not necessary to check the quality of ① or judge the fake fingerprint of ②. It can be applied selectively.

Passenger Authentication

Hereinafter, with reference to Figure 7, the access authentication method of the present invention will be described as a whole. However, it will be described on the premise that the accessor is a complete accessor registration so that the accessor can open the door (11). The accessor registration is registered with the first identification code (ie, the accessor information) mapped to the second identification code in the mobile terminal 230, and the accessor fingerprint mapped to the first identification code in the fingerprint input device 250. Say.

<Commencement of resident authentication by entering door open command: S701 ~ S705>

When the access control unit 239a receives a 'control command for opening the door' from the accessor through the input unit 233 (S701), the accessor's identification code (first identification code) and the identification code of the access controller 210 (first 2) identification information) is input together with the information on the accessor and the information on the access controller 210 to access the accessor (S703).

When the first identification code is confirmed and it is confirmed that the first identification code and the second identification code are mapped to each other, the access control unit 239a sees that the accessor is a registered accessor to the fingerprint input device 250 'authentication start command' Send a request to authenticate the accessor. The authentication start command includes the first identification code of the accessor. If the fingerprint input device 250 is not connected, the access control unit 239a may display a guide message requesting the fingerprint input device 250 to be connected to the user through the display unit 231 (S705).

<Authorization Certificate: S707, S709>

When the authentication control unit 439 of the fingerprint input device 250 receives the 'authentication start command', the authentication control unit 439 turns on the light source 431 to start the accessor authentication process. When a person enters a fingerprint by contacting his or her fingerprint with the fingerprint contact surface 411a, the light emitted from the light source 431 is changed into a fingerprint image on the fingerprint contact surface 411a, and the image sensor 433 is an exit surface 411b. ) To convert the fingerprint image from the fingerprint image. For convenience of description, the fingerprint image generated by the image sensor 433 in the authentication process is referred to as a 'fingerprint fingerprint image' (S707).

The authentication controller 439 checks the quality of the fingerprint image for authentication and determines whether the fingerprint image for authentication is a fake fingerprint. If there is no problem with the quality check and is not a fake fingerprint, the authentication control unit 439 extracts the feature point from the fingerprint image for authentication and b) a fingerprint template mapped to the first identification code included in the authentication start command (ie, the fingerprint template of the accessor). ) Is extracted from the memory 435 and is compared (S709).

<Opening doors based on successful authentication: S711, S713>

If the authentication feature 439 is the same as the fingerprint template of the first identification code, the authentication control unit 439 notifies the mobile terminal 230 of authentication success, thereby terminating the authentication process for the accessor initiated by the authentication start command (S711). .

When the access control unit 239a of the mobile terminal 230 receives the authentication success from the fingerprint input device 250, the access control unit 239a transmits an access door opening command of a preset type to the access controller 210. When the access controller 210 receives the 'access door opening command' from the mobile terminal 230, the door controller 10 controls the door lock 10 to open the door 11 (S713).

<Certificate Failure: S715>

If the fingerprint image for authentication is not the fingerprint template registered with the first identification code in step S709, the authentication controller 439 notifies the mobile terminal 230 of the authentication failure, thereby authenticating the access person initiated by the authentication start command. End the process.

If the quality of the fingerprint image is poor or is determined to be a fake fingerprint, the authentication controller 439 may provide the error information to the mobile terminal 230 or display it through the display unit, and provide the error information and display through the display unit. You can also do it all. In the fingerprint authentication process, it is not necessary to check the quality of ① or judge the fake fingerprint of ②. It can be applied selectively.

In the above manner, access control of the present invention is performed. In the fingerprint authentication process of FIG. 7, the authentication control unit 439 of the fingerprint input device 250 notifies the mobile terminal 230 of the authentication success or authentication failure, the fingerprint template generated for fingerprint registration, the fingerprint template for authentication or the like. The registered fingerprint template is not provided to the mobile terminal 230. Therefore, the fingerprint template of the user stored in the fingerprint input device 250 is basically not leaked to the outside. In addition, since the fingerprint template stored in the memory 435 is encrypted, even if the fingerprint template stored in the memory 435 is leaked in the process of loss or the like, the contents cannot be confirmed or modified.

Example 1

In operation S711 of FIG. 7, the authentication controller 439 simply notifies the mobile terminal 230 of the authentication success. However, according to an exemplary embodiment, the authentication controller 439 may transmit a predetermined 'authentication code' in response to the authentication success. The mobile terminal 230 receiving the 'authentication code' transmits the authentication code to the access controller 210 instead of transmitting the 'door access command', and the door lock driving unit 213 of the access controller 210 receives the authentication code. Upon receiving the door 11 is opened.

Here, the authentication code is registered only in the access controller 210 and the fingerprint input device 250 and is different from the door opening command managed by the mobile terminal 230. The mobile terminal 230 serves as a relay that simply transfers the authentication code received from the fingerprint input device 250 to the access controller 210, and does not consider or determine whether the accessor authentication is successful or failed.

Example 2 (Software Distribution Server)

Referring to FIG. 8, the access control system 800 of the present invention may further include a software distribution server 810. The software distribution server 810 includes a computer-readable storage medium 811 and stores software for the access control unit 239a of the mobile terminal 230. Mobile terminal 230 may connect to software distribution server 810 via network 40.

First, the terminal control unit 239 of the mobile terminal 230 may be interpreted as a configuration specially installed for the present invention, but generally performs the main or basic functions (eg, telephone, communication, etc.) of the mobile terminal 230. It may be a configuration installed to do so. When the terminal controller 239 is configured to perform the basic functions of the mobile terminal 230 as described above, the terminal controller 239 includes a processor chip, which is hardware basically possessed by the mobile terminal 230, and It may be functionally directed to a configuration implemented by an operating system (OS) operating based on the chip. In other words, the conventional terminal to which the present invention is not applied may also include a terminal controller 239.

In addition, the access control unit 239a may be installed in an existing terminal for implementing the present invention as software or an application running on the operating system program. In other words, when the access control unit 239a of the present invention is installed in the existing portable terminal, the mobile terminal 230 of the present invention becomes. The software distribution server 810 stores access control software for the access control unit 239a.

The user may access the software distribution server 810 with the mobile terminal 230, download the access control software (or application), and install the access control unit 239a.

Expanding the present invention, the mobile terminal 230 can be used in various fields that require personal authentication using the fingerprint input device 250. In this case, the necessary software can be downloaded and installed through the software distribution server 810.

While the above has been shown and described with respect to preferred embodiments of the invention, the invention is not limited to the specific embodiments described above, it is usually in the technical field to which the invention belongs without departing from the spirit of the invention claimed in the claims. Various modifications can be made by those skilled in the art, and these modifications should not be individually understood from the technical spirit or the prospect of the present invention.

Claims (7)

In the access control system,
Receiving the door open command control the door lock to open the door, the access controller for assigning a unique authentication code to the registered person to open the door:
A portable device which is connected to a mobile terminal by a cable and is supplied with power and includes an optical unit and a circuit unit. Fingerprint input device for receiving the user to perform authentication, and to provide the authentication code to the mobile terminal if the authentication is successful. The optical unit generates and outputs a fingerprint image of the fingerprint of the person in contact with the fingerprint contact surface, and the circuit unit receives the fingerprint image from the optical unit to generate a fingerprint image and performs the accessor authentication; And
After confirming the first identification code and the access controller from the information input by the accessor, if the mapping between the first identification code and the access controller is confirmed, the authentication start command is provided to the fingerprint input device to request authentication. And receiving the authentication code from the fingerprint input device, and intervening the access controller so that the access controller can confirm access authentication.
The circuit portion,
Irradiating light for fingerprint input to the fingerprint contact surface using a blue, green or red LED whose color is exposed through the fingerprint contact surface, when power is supplied through a communication interface to start an operation, authentication from the mobile terminal When receiving a start command and receiving a fingerprint, and proceeding with authentication according to an authentication start command and determining whether the authentication succeeds or fails, the operation state is also turned on and turned off in a specific pattern at at least one time point selected. A plurality of light sources for displaying;
An image sensor receiving a fingerprint image from the optical unit and generating a fingerprint image;
A memory in which fingerprint templates of a plurality of registered fingerprints are stored;
The communication interface connected to the mobile terminal to transmit / receive data and supply power; And
A control unit which operates the light source according to an authentication start command of the mobile terminal, performs authentication by comparing a fingerprint image generated by the image sensor with a template of an accessor registered in the memory, and notifies the mobile terminal of the authentication result; Access control system comprising a.
delete The method of claim 1,
The optical unit,
A fingerprint contact surface in which the light of the light source is converted into a fingerprint image, a light incident surface parallel to the fingerprint contact surface and totally reflecting the fingerprint image from which the light emitted from the light source is incident and converted from the fingerprint contact surface, the fingerprint contact surface and the light incident surface A planar optical refractor including an exit surface disposed between and having an exit surface on which the fingerprint image is emitted and a back surface facing the exit surface and inclined to form an interior angle with the light entrance surface (the cabinet is the back surface of the light An angle at which the fingerprint image totally reflected from the incident surface is totally reflected toward the exit surface;
A lens provided between the exit surface and the image sensor to form the fingerprint image with the image sensor; And
The optical unit includes a first mirror disposed between the lens and the image sensor to reflect the image sensor in parallel with the fingerprint contact surface to reflect the fingerprint image passing through the lens to the image sensor. Access control system, characterized in that implemented in the shape of a plate.
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