WO2019198871A1 - Portable optical fingerprint input device connected to mobile terminal when used - Google Patents
Portable optical fingerprint input device connected to mobile terminal when used Download PDFInfo
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- WO2019198871A1 WO2019198871A1 PCT/KR2018/005778 KR2018005778W WO2019198871A1 WO 2019198871 A1 WO2019198871 A1 WO 2019198871A1 KR 2018005778 W KR2018005778 W KR 2018005778W WO 2019198871 A1 WO2019198871 A1 WO 2019198871A1
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- fingerprint
- optical
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- input device
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- 238000000034 method Methods 0.000 claims description 28
- 230000008569 process Effects 0.000 description 15
- 230000006870 function Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 241000723347 Cinnamomum Species 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/12—Fingerprints or palmprints
- G06V40/13—Sensors therefor
- G06V40/1318—Sensors therefor using electro-optical elements or layers, e.g. electroluminescent sensing
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B17/00—Systems with reflecting surfaces, with or without refracting elements
- G02B17/02—Catoptric systems, e.g. image erecting and reversing system
- G02B17/06—Catoptric systems, e.g. image erecting and reversing system using mirrors only, i.e. having only one curved mirror
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/30—Authentication, i.e. establishing the identity or authorisation of security principals
- G06F21/31—User authentication
- G06F21/32—User authentication using biometric data, e.g. fingerprints, iris scans or voiceprints
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/12—Fingerprints or palmprints
- G06V40/1365—Matching; Classification
Definitions
- the present invention relates to a small portable optical fingerprint input device that is connected to a mobile terminal of a user such as a smartphone or a tablet and is enhanced in security.
- Fingerprint recognition as a personal authentication means is still widely used and the most generalized authentication means compared to other means because it presents a simple structure and counterfeit fingerprint defense performance.
- a popular method for acquiring fingerprint information is an optical method using an optical refractor such as a prism.
- an image of a light source 1 for irradiating fingerprint recognition light, a prism 3 to which a finger contacts, and a fingerprint image emitted from the prism 3 are formed.
- 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.
- 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.
- the semiconductor method has an advantage of reducing the size, but there is a limit in performance in detecting a forged fingerprint.
- Secutronics discloses a fingerprint input device having a relatively thin thickness by using a plate-shaped optical refractor that is not triangular.
- the fingerprint input device arranges a light source on the side of the optical refractor to obtain a fingerprint image by using the light scattered in the optical refractor.
- the device has achieved a thin fingerprint input device as a whole by using a thin optical refractor.
- the fingerprint input device proposed by the present invention is still implemented by a method embedded in a mobile device.
- the thickness of the terminal may be larger than a predetermined size by the fingerprint input device. Therefore, this method does not meet the tendency of thinning of mobile terminals in recent years, and of course, there is a problem that cannot be used in a mobile terminal that is produced and used.
- the external fingerprint recognition device 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.
- Fingerprint input device using a mobile terminal equipped with a camera and external optical device for fingerprint input thereof Korean Patent Nos.1493332, 1479609
- An object of the present invention is to provide a portable optical fingerprint input device with a thin thickness which is connected to a mobile device of a user such as a smartphone or a tablet and has enhanced security.
- a portable optical fingerprint input device comprising: 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 user authentication.
- 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 the authentication request for the first user of the mobile terminal, performs authentication by comparing the fingerprint image generated by the image sensor with a template of the first user registered in the memory. Notify the mobile terminal of the authentication result.
- the optical unit may include a flat optical refractor including a fingerprint contact surface on an upper surface and an emission surface on which the fingerprint image is emitted on a front surface connected to the upper surface; A plurality of light sources disposed below the optical refractor at regular intervals to irradiate light for fingerprint input to the fingerprint contact surface through a lower surface of the optical refractor; A lens provided between the exit surface and the image sensor to form the fingerprint image with the image sensor; And 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.
- the optical refraction unit the fingerprint contact surface for converting the light emitted from the light source to the fingerprint image while being scattered and reflected by the contact fingerprint
- the emission surface disposed on the front surface perpendicular to the fingerprint contact surface
- a light incidence surface disposed on a lower surface facing the plurality of light sources and emitted from the plurality of light sources, the light incidence surface totally reflecting the fingerprint image converted from the fingerprint contact surface, and an inclination so as to form an internal angle with the light incidence surface It is preferably provided with a back side, wherein the inside angle is preferably set to an angle capable of totally reflecting the fingerprint image totally reflected from the light incident surface toward the exit surface.
- the communication interface is a USB (Universal Serial Bus) or RS-232 serial communication interface, and may include a connection terminal to which a cable connecting the mobile terminal is connected.
- USB Universal Serial Bus
- RS-232 serial communication interface may include a connection terminal to which a cable connecting the mobile terminal is connected.
- the plurality of light sources of the present invention is to expose the color through the fingerprint contact surface using a blue, red or green LED.
- the light source is the power supply through the communication interface to start the operation, when receiving the authentication start command from the mobile terminal to receive the fingerprint input, and proceeds authentication according to the authentication start command, the authentication success or authentication
- the operation state may be displayed without having a separate display unit by being turned on and off in a predetermined specific pattern at at least one selected time point.
- 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 has a smaller overall size, the fingerprint input device can obtain a fingerprint image having a size sufficient to secure a feature point by maximizing the fingerprint input surface.
- 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.
- FIG. 1 is a conceptual diagram provided to explain a conventional optical fingerprint input method
- FIG. 2 is a perspective view of a fingerprint input device of the present invention connected to a mobile terminal;
- FIG. 3 is a block diagram of a fingerprint input device of the present invention.
- FIG. 4 is a cross-sectional view provided for explaining a fingerprint image generation process of the fingerprint input device of the present invention.
- the fingerprint input apparatus 200 of the present invention obtains a fingerprint image from a user fingerprint in contact with the fingerprint contact surface 211a 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 200 may be connected to the mobile terminal 10, and performs fingerprint registration, fingerprint authentication, etc. under the control of the mobile terminal 10.
- the mobile terminal 10 corresponds to terminals that perform a user interface function and connect to an external server on behalf of the fingerprint input device 200 of the present invention, and other principals not related to the fingerprint input of the present invention. It may have a function. Accordingly, the mobile terminal 10 should include display means for displaying an image or text and input means for receiving a user control command. For example, devices called so-called 'tablets' or 'smart phones' It may correspond to the mobile terminal 10 of the present invention.
- the mobile terminal 10 of FIG. 2 is provided with a touch pad 11 for display means and input means.
- the mobile terminal 10 should have a communication interface connected to the communication interface 237 of the fingerprint input device 200 described below, and can be supplied with a universal serial bus or RS-232 for data transmission and reception. Etc. are preferable.
- the fingerprint input device 200 of the present invention includes an optical unit 210, a circuit unit 230, and a housing 250 to accommodate them. 2, in the housing 250, a fingerprint contact window 251 for inputting a fingerprint by a user is formed on an upper surface thereof, and the connection terminal 237a of the display unit 233 and the communication interface 237 described below. ) Is exposed. Since the size of the fingerprint contact window 251 is smaller than the fingerprint contact surface 211a of the optical refraction machine 211 described below, the area of the fingerprint input at one time by the fingerprint contact window 251 is determined. It should be approximately 15 x 20mm in size for sufficient user authentication. When the communication cable 30 is connected between the connection terminal 237a and the mobile terminal 10 to connect the fingerprint input device 200 with the mobile terminal 10, the fingerprint input device 200 is not supplied with operating power. .
- the optical unit 210 includes an optical refractor 211, a lens 213, and a first mirror 215, and a user who contacts the fingerprint contact surface 211a of the optical refractor 211. Make a fingerprint image for your fingerprint.
- the fingerprint image generated by the optical unit 210 is input to the image sensor 231 of the circuit unit 230 to form an image.
- the light source 217 irradiates light for generating an optical fingerprint image toward the fingerprint contact surface 211a of the optical refractor 211.
- the light source 217 may be illuminated despite the angle of view of the light source 217. Since the area that can be limited is limited, it is important to arrange the plurality of light sources 217 at regular intervals to illuminate the fingerprint contact surface 211a relatively uniformly.
- the image sensor 231 generates a digital fingerprint image from the fingerprint image incident from the photorefractor 211, and the lens 213 forms an image from the exit surface of the photorefractor 211 on the image sensor 231. do.
- the first mirror 215 is disposed on the optical path between the lens 213 and the image sensor 231 to change the path of the fingerprint image emitted from the optical refractor 211 by a certain angle (for example, 90 °). 231 may be disposed in parallel with the optical refraction machine 211, so that the fingerprint input device 200 may be sufficiently flat and thin.
- the lens 213 and the first mirror 215 form an optical path between the emission surface 211b of the optical refractor 211 and the image sensor 231, thereby providing a fingerprint image emitted from the optical refractor 211.
- Light is incident on the image sensor 231.
- FIG. 2 shows the lens 213 disposed in front of the first mirror 215, this arrangement is, of course, illustrative, and for example, additional mirrors may be placed before or after the lens 213.
- a plurality of lenses 213 can also be used as necessary.
- the optical refractor 211 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 217 is incident, and an exit surface to which the fingerprint image is finally emitted. Do. However, the optical refractor 211 may be implemented in a thin flat plate shape so that the fingerprint input device 200 may be sufficiently thin in a plate shape. The size of the fingerprint contact surface of the optical refractor 211 may correspond to or be larger than the fingerprint contact window 251. In addition, for sufficient user authentication, the fingerprint contact surface should preferably have a size of approximately 15 x 20 mm or more.
- the optical refractor 211 of FIG. 4 is an example of the optical refractor of the present invention.
- the fingerprint contact surface 211a is disposed on the 'upper surface'
- the emission surface 211b is disposed on the 'front surface' perpendicular to the fingerprint contact surface 211a
- the light incident surface is disposed on the lower surface. It is a board-board shape in which 211c is disposed.
- the rear surface 211d facing the front surface of the optical refractor 211 forms a light incident surface 211c and an internal angle ⁇ having a predetermined size.
- the arrangement of the cabinet ⁇ is for total reflection of the path of the fingerprint image totally reflected in the optical refraction machine 211 to the exit surface 211b as shown in FIG. 4.
- the path of the fingerprint image in the photorefractor 211 will be described again with reference to the light source 217 below.
- the circuit unit 230 includes a light source 217, an image sensor 231, a display unit 233, a memory 235, a communication interface 237, and a controller 239. Since the fingerprint input device 200 receives power from the mobile terminal 10, the fingerprint input device 200 does not need to include a battery or a power supply.
- the circuit unit 230 is disposed below the flat optical refractor 211 in parallel with the fingerprint contact surface 211a, thereby miniaturizing and optimizing the size of the fingerprint input device 200.
- the light source 217 is disposed to face the light incident surface 211c of the light refractor 211, so that light emitted from the light source 217 is directly incident on the light incident surface 211c of the light refractor 211. .
- the fingerprint input apparatus 200 of FIG. 2 generates a fingerprint image in a transmissive (ie, scattering) manner.
- the light source 217 is disposed on the lower surface side of the optical refractor 211 so that the lower surface of the optical refractor 211 becomes a light incident surface. Light emitted from the light source 217 is incident on the light incident surface 211c perpendicularly.
- the fingerprint image contacts the fingerprint contact surface 211a. Formed mainly by light scattered from the ridges of a fingerprint, the valleys are dark and the ridges appear bright, resulting in a good contrast. Referring to FIG. 4, light is scattered or reflected on the fingerprint contact surface 211a and becomes a fingerprint image, and is totally reflected on the light incident surface 211c and the back surface 211d of the optical refractor 211.
- the light incident surface 211c and the back surface 211d form an internal angle ⁇ so that the fingerprint image totally reflected from the light incident surface 211c can be sufficiently totally reflected toward the exit surface 211b.
- the fingerprint image emitted from the exit surface 211b is collected through the lens 213, reflected by the first mirror 215, and incident on the image sensor 231.
- the image sensor 231 receives a fingerprint image emitted from the exit surface 211b of the optical refractor 211 and passes through the lens 213 to generate a fingerprint image, and stores the fingerprint image in the memory 235 and the controller 239. To provide. Since the image sensor 231 is disposed at an angle of 90 ° with respect to the emission surface 211b, a first mirror 215 is required between the emission surface 211b and the image sensor 231.
- the input device 200 can be miniaturized.
- the display unit 233 is a display unit for displaying the operation state of the fingerprint input apparatus 200 to the user, and may be various forms of display means. For example, in order to miniaturize the fingerprint input device 200, the display unit 233 may be sufficient as one or two LEDs to indicate that the user is requesting to input a fingerprint. However, the display unit 233 is not an essential configuration.
- the display unit 233 may be replaced by using a blue, red, or green LED as the light source 217.
- the light source 217 When the light source 217 is turned on for the fingerprint input, the color of the LED is reflected through the fingerprint contact window 251 so that the user can know that the fingerprint input device 200 is in an operating state.
- the control unit 239 sets the blue, red, or green light source 217 in a predetermined pattern. By turning on and off, the operation state can be displayed without providing a separate display unit 233.
- the memory 235 stores a fingerprint image generated by the image sensor 231, a template (feature point data) of the fingerprint registered through the fingerprint registration process, authentication history information, and the like.
- the fingerprint input device 200 according to the present invention.
- Various information of is stored.
- the enrolled fingerprint template and / or fingerprint image stored in the memory 235 are stored to be classified and searched by a certain serial number or the like.
- the data stored in the memory 235 is preferably encrypted by the controller 239.
- the communication interface 237 uses a wired communication interface for supplying power and communicating with the mobile terminal 10. For example, protocols such as USB or RS-232 can be used.
- the communication interface 237 has a connection terminal 237a exposed at one side of the housing 250.
- the controller 239 controls the overall operation of the fingerprint input device 200 of the present invention.
- the controller 239 first performs a fingerprint registration and authentication process for a specific user (hereinafter referred to as a first user) under the control of the mobile terminal 10, and provides the result to the mobile terminal 10.
- a specific user hereinafter referred to as a first user
- the communication interface will be described below even if it is described as if there is direct communication between the control unit 239 and the mobile terminal 10. It should be understood that the transmission and reception by (237).
- the controller 239 receives the fingerprint registration command from the mobile terminal 10, the controller 239 turns on the light source 217 to start the fingerprint registration process. At this time, the fingerprint registration command of the mobile terminal 10 includes the 'identification code' assigned to the first user to register.
- the image sensor 231 converts the fingerprint image into a digital fingerprint image.
- the controller 239 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 controller 239 generates a fingerprint template by extracting feature points from the fingerprint image, and then maps the 'identification code' included in the fingerprint registration command and stores it in the memory 235.
- the controller 239 notifies the mobile terminal 10 of the fingerprint registration completion according to the fingerprint registration command together with storing the fingerprint template, thereby completing the fingerprint registration for the first user initiated by the fingerprint registration command.
- the control unit 239 can encrypt and store the fingerprint template with a certain encryption code.
- the controller 239 may provide the error information to the mobile terminal 10 or display it through the display unit 233, and provide the error information and display unit 233. You can also perform all of the display with). 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.
- User authentication is also initiated at the request of the mobile terminal 10.
- the controller 239 receives the 'authentication start command' from the mobile terminal 10, the controller 239 turns on the light source 217 to start a user authentication process.
- the 'authentication start command' of the mobile terminal 10 includes the 'identification code' of the first user to be authenticated.
- the image sensor 231 converts the fingerprint image into the fingerprint image.
- the fingerprint image generated by the image sensor 231 during the authentication process is referred to as a 'fingerprint fingerprint image'.
- the controller 239 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 control unit 239 extracts the feature point from the fingerprint image for authentication and maps the fingerprint template (ie, the fingerprint template of the first user) to the identification code on the authentication start instruction from the memory 235. ) And compare them for equality.
- the fingerprint template ie, the fingerprint template of the first user
- the controller 239 notifies the mobile terminal 10 of successful authentication, thereby terminating the authentication process for the first user initiated by the authentication start command. If the feature point for authentication and the fingerprint template extracted from the memory 235 are not the same, the controller 239 notifies the mobile terminal 10 of the authentication failure, thereby performing the authentication process for the first user initiated by the authentication start command. Quit.
- the controller 239 may provide the error information to the mobile terminal 10 or display it through the display unit 233, and provide the error information and display unit 233. You can also perform all of the display with). 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.
- the controller 239 notifies the mobile terminal 10 of fingerprint registration completion, authentication success or authentication failure, and generates a fingerprint template, a fingerprint template for authentication, or a registered fingerprint.
- the template is not provided to the mobile terminal 10. Therefore, the fingerprint template of the user stored in the fingerprint input device 200 is basically not leaked to the outside.
- the fingerprint template stored in the memory 235 is encrypted, even if the fingerprint template stored in the memory 235 is leaked in the process of loss or the like, the contents cannot be confirmed or modified.
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Abstract
Disclosed is a portable optical fingerprint input device connected to a mobile terminal when used. The fingerprint input device of the present invention has a minimized size by using a flat-shaped optical refractor. Nonetheless, the fingerprint input device includes all the elements required for an optical fingerprint authentication and stores a template of a fingerprint registered in an internal memory, and thus has achieved enhanced personal information security.
Description
본 발명은 스마트폰이나 태블릿과 같은 사용자의 모바일 단말기에 연결하여 사용하며 보안이 강화된 소형의 휴대용 광학식 지문입력장치에 관한 것이다.The present invention relates to a small portable optical fingerprint input device that is connected to a mobile terminal of a user such as a smartphone or a tablet and is enhanced in security.
개인 인증수단으로서 지문인식은 간단한 구조와, 위조 지문 방어 성능을 제시하기 때문에, 여전히 널리 사용되고 다른 수단에 비해 가장 일반화된 인증수단이다. 지문정보를 획득하는 방법으로 보편화된 방법은 프리즘과 같은 광굴절기를 사용하는 광학적인 방법이다. Fingerprint recognition as a personal authentication means is still widely used and the most generalized authentication means compared to other means because it presents a simple structure and counterfeit fingerprint defense performance. A popular method for acquiring fingerprint information is an optical method using an optical refractor such as a prism.
종래의 광학식 지문입력장치는 도 1에 도시된 바와 같이, 지문인식용 광을 조사하는 광원(1)과, 손가락이 접촉하는 프리즘(3)과, 프리즘(3)으로부터 출사되는 지문 영상을 결상하기 위한 렌즈(4)와, 렌즈(4)에 결상된 지문영상을 전기적인 신호로 변환하는 이미지 센서(Image Sensor)(5)로 구성된다. 광학식 지문입력장치에는 프리즘(3)과 광원(1)의 배치구조에 따라 산란식 장치와 흡수식 장치가 있다. 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 to 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.
광원(1)에서 출사된 광은 프리즘(3)으로 입사하여 프리즘(3)의 지문접촉면(3a)에 접촉된 지문의 골과 융선에서 반사, 흡수 또는 산란되면서 지문 패턴으로 영상화되어, 프리즘(3)의 출사면(3b)을 통해 다시 출사된다. 프리즘(3)에서 출사된 지문 영상은 렌즈(4)를 통해 이미지 센서(5)에 결상됨으로써 디지털 지문 이미지가 생성된다. 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.
광학식 지문인증은 광굴절기를 사용하기 때문에 기본적으로 소형화에 한계가 있다고 인식된다. 프리즘(3)은 삼각형 형상의 단면을 가지면서 광 경로를 일정한 각도 이상으로 변경시키기 때문에, 어떠한 방식에 의하더라도 프리즘(3)을 사용하는 지문입력장치는 반도체 타입 등에 비해 큰 부피를 가질 수밖에 없기 때문이다. 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.
광학식 지문인증을 대신하는 다른 개인 인증 방식들이 있다. 예를 들어, 스마트폰이나 태블릿과 같은 최근의 모바일 단말기에는 여전히 비밀번호가 사용되거나, 카메라를 이용한 얼굴인식 등이 사용되는데 일반적으로 불편하다. 지문인증 방식 중에 반도체 방식은 크기를 줄일 수 있는 이점이 있지만, 위조지문 검출 등에서 성능의 한계가 있다. There are other personal authentication methods that replace optical fingerprint authentication. For example, in recent mobile terminals such as smartphones or tablets, passwords are still used or face recognition using a camera is generally inconvenient. Among the fingerprint authentication methods, the semiconductor method has an advantage of reducing the size, but there is a limit in performance in detecting a forged fingerprint.
최근에 모바일 단말기는 대부분의 사람이 휴대하는 장치가 되었고, 다양한 센서와 기능을 보유하는 추세에 있다. 그 중에 중요한 하나가 개인인증 수단이다.개인 인증 자체의 품질을 위해서는 광학식이 적절하지만 소형화의 한계를 극복해야 한다. In recent years, mobile terminals have become a device that most people carry, and have a tendency to have various sensors and functions. One of the most important is the means of personal authentication. For the quality of personal authentication itself, optical is appropriate, but the limitation of miniaturization must be overcome.
대안으로, 대한민국 공개특허 제2005-90884호를 참조하면, 씨큐트로닉스는 삼각형 형상이 아닌 판상의 광굴절기를 사용함으로써 비교적 얇은 두께의 지문입력장치를 개시하고 있다. 해당 지문입력장치는 광굴절기의 측면에 광원을 배치하여 광굴절기 내에서 산란된 광을 이용하여 지문영상을 획득한다. 이 장치가 얇은 광굴절기를 사용함으로써 전체적으로 얇은 지문입력장치를 구현한 성과가 있다. Alternatively, referring to Korean Patent Laid-Open Publication No. 2005-90884, Secutronics discloses a fingerprint input device having a relatively thin thickness by using a plate-shaped optical refractor that is not triangular. The fingerprint input device arranges a light source on the side of the optical refractor to obtain a fingerprint image by using the light scattered in the optical refractor. The device has achieved a thin fingerprint input device as a whole by using a thin optical refractor.
그러나 씨큐트로닉스 발명(공개공보의 도 13과 그 설명 등)을 참조하면, 이 발명이 제시하는 지문입력장치는 여전히 모바일 기기 내에 내장하는 방법으로 구현됨을 알 수 있다. 지문입력장치를 단말기에 내장하게 되면, 단말기의 두께는 그 지문입력장치에 의해 일정한 크기 이상이 될 수밖에 없다. 따라서 이 방법은 최근에 모바일 단말기들의 두께가 얇아지는 경향에 부합하지 못할 뿐만 아니라, 당연히 기존에 생산되어 사용 중인 모바일 단말기에서는 사용할 수 없는 문제도 있다.However, referring to the Secutronics invention (FIG. 13 and its description, etc.), it can be seen that the fingerprint input device proposed by the present invention is still implemented by a method embedded in a mobile device. When the fingerprint input device is embedded in the terminal, the thickness of the terminal may be larger than a predetermined size by the fingerprint input device. Therefore, this method does not meet the tendency of thinning of mobile terminals in recent years, and of course, there is a problem that cannot be used in a mobile terminal that is produced and used.
출원인은 모바일 단말기에 외장하는 형식의 지문인식장치에 관한 발명을 특허 등록한 바 있다. 이 발명에 따른 외장형 지문인식장치는 광굴절기와 렌즈 등을 구비하는 대신에 조명과 이미지 센서를 대신하여 모바일 단말기에 내장된 조명과 카메라를 이용하는 방식의 지문인식장치이다. 지문인식장치의 구성 중 일부를 모바일 단말기를 이용하는 방식이기 때문에, 외장 지문인식장치을 소형화시킬 수 있었다. Applicant has registered a patent on a fingerprint recognition device of the type external to a 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.
한편, 생명보험 등의 지급은 계약자와 피보험자가 서로 다를 수밖에 없기 때문에 '계피상이 계약'에 따른다. 문제는 계약자의 사망으로 보험금을 지급할 때 계약자의 인증이 필요한데, 이때에도 지문인증이 유일한 수단으로 인식된다. 계약자가 사망한 상태이므로, 다른 인증수단, 예컨대 홍채, 얼굴 인식 등은 인증이 어렵기 때문이다. 이러한 경우의 개인 인증은 더욱 보안이 중요해서 무단으로 접속하여 등록 지문을 읽어오거나 인증기록 등을 해킹할 수 없도록 할 필요가 있다. On the other hand, the payment of life insurance, etc., because the contractor and the insured must be different from each other, according to the 'cinnamon contract.' The problem is that the contractor's certificate is required when paying the insurance benefits due to the contractor's death. Since the contractor is dead, other authentication means, such as iris and face recognition, are difficult to authenticate. In this case, personal authentication is more important for security, so it is necessary to prevent unauthorized access to read a registered fingerprint or hack an authentication record.
[관련 기술 문헌][Related Technical Documents]
1. 모바일기기용 광학 지문입력장치(대한민국 공개특허 제2005-90884호)1. Optical fingerprint input device for mobile devices (Korean Patent Publication No. 2005-90884)
2. 카메라가 장착된 모바일 단말기를 이용한 지문입력장치 및 그 지문입력용 외장 광학기기 (대한민국 등록특허 제1493332호, 제1479609호)2. Fingerprint input device using a mobile terminal equipped with a camera and external optical device for fingerprint input thereof (Korean Patent Nos.1493332, 1479609)
본 발명의 목적은, 스마트폰이나 태블릿과 같은 사용자의 모바일 기기에 연결하여 사용하며 보안이 강화된 두께가 얇은 휴대용 광학식 지문입력장치를 제공함에 있다.SUMMARY OF THE INVENTION An object of the present invention is to provide a portable optical fingerprint input device with a thin thickness which is connected to a mobile device of a user such as a smartphone or a tablet and has enhanced security.
상기 목적을 달성하기 위한 본 발명에 따른 휴대용 광학식 지문입력장치는, 광굴절기와 광원을 구비하여 상기 광굴절기의 지문접촉면에 접촉한 지문의 지문 영상을 생성하여 출력하는 광학 유닛과; 상기 광학 유닛으로부터 지문 영상을 입력받아 지문 이미지를 생성하고 사용자 인증을 수행하는 회로부를 포함한다. 여기서, 상기 회로부는 이미지 센서, 메모리, 통신인터페이스 및 제어부를 포함한다. 이미지 센서는 상기 광학 유닛으로부터 지문 영상을 입력받아 지문 이미지를 생성하고, 메모리에는 등록된 복수 개 지문의 지문 템플릿들이 저장된다. 통신인터페이스는 모바일 단말기와 유선으로 연결되어 통신하고 상기 모바일 단말기로부터 전원을 공급받는다. 제어부는 상기 모바일 단말기의 제1 사용자에 대한 인증요청에 따라 상기 광학 유닛을 동작시키고, 상기 이미지 센서가 생성한 지문 이미지를 상기 메모리에 등록된 제1 사용자의 템플릿과 비교하여 인증을 수행하며, 상기 모바일 단말기에게 인증 결과를 통지한다. According to an aspect of the present invention, there is provided a portable optical fingerprint input device comprising: 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 user 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 the authentication request for the first user of the mobile terminal, performs authentication by comparing the fingerprint image generated by the image sensor with a template of the first user registered in the memory. Notify the mobile terminal of the authentication result.
실시 예에 따라, 상기 광학 유닛은, 상면에 지문접촉면을 구비하고, 상기 상면과 연결된 전면에 상기 지문 영상이 출사되는 출사면을 구비한 평판 형상의 광굴절기와; 상기 광굴절기의 아래쪽에 일정한 간격으로 배치되어 상기 광굴절기의 아랫면을 통해 상기 지문접촉면으로 지문 입력을 위한 광을 조사하는 복수 개의 광원과; 상기 출사면과 이미지 센서 사이에 마련되어 상기 지문 영상을 상기 이미지 센서로 결상하는 렌즈와; 상기 이미지 센서를 상기 지문접촉면과 평행하게 배치할 수 있도록 상기 렌즈와 이미지 센서 사이에 배치되어 상기 렌즈를 통과한 지문 영상을 상기 이미지 센서로 반사시키는 제1 미러(Mirror)를 포함한다. According to an embodiment of the present disclosure, the optical unit may include a flat optical refractor including a fingerprint contact surface on an upper surface and an emission surface on which the fingerprint image is emitted on a front surface connected to the upper surface; A plurality of light sources disposed below the optical refractor at regular intervals to irradiate light for fingerprint input to the fingerprint contact surface through a lower surface of the optical refractor; A lens provided between the exit surface and the image sensor to form the fingerprint image with the image sensor; And 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.
또한, 상기 광굴절기는, 상기 광원에서 출사된 광이 상기 접촉한 지문에 의해 산란 및 반사되면서 상기 지문 영상으로 전환시키는 상기 지문접촉면과, 상기 지문접촉면에 수직한 전면에 배치된 상기 출사면과, 상기 복수 개의 광원과 대향하는 아랫면에 배치되고 상기 복수 개의 광원에서 출사된 광이 입사되고, 상기 지문접촉면에서 전환된 지문 영상을 전반사하는 광입사면과, 상기 광입사면과 내각을 형성하도록 경사지게 배치된 뒷면을 구비하며, 상기 내각은 상기 광입사면에서 전반사된 지문 영상을 상기 출사면을 향해 전반사시킬 수 있는 각도로 설정되는 것이 바람직하다. In addition, the optical refraction unit, the fingerprint contact surface for converting the light emitted from the light source to the fingerprint image while being scattered and reflected by the contact fingerprint, and the emission surface disposed on the front surface perpendicular to the fingerprint contact surface, A light incidence surface disposed on a lower surface facing the plurality of light sources and emitted from the plurality of light sources, the light incidence surface totally reflecting the fingerprint image converted from the fingerprint contact surface, and an inclination so as to form an internal angle with the light incidence surface It is preferably provided with a back side, wherein the inside angle is preferably set to an angle capable of totally reflecting the fingerprint image totally reflected from the light incident surface toward the exit surface.
다른 실시 예에 따르면, 상기 통신인터페이스는 유에스비(USB: Universal Serial Bus) 또는 RS-232 직렬 통신 인터페이스로서, 상기 모바일 단말기를 연결하는 케이블이 접속하는 접속 단자를 구비할 수 있다. According to another embodiment, the communication interface is a USB (Universal Serial Bus) or RS-232 serial communication interface, and may include a connection terminal to which a cable connecting the mobile terminal is connected.
또 다른 실시 예에 따른 본 발명의 상기 복수 개의 광원은 청색, 적색 또는 녹색 엘이디를 사용하여 상기 지문접촉면을 통해 색상이 노출되도록 한다. 또한, 광원은 상기 통신 인터페이스를 통해 전원이 공급되어 동작을 개시하는 시점, 상기 모바일 단말기로부터 인증개시명령을 수신하여 지문을 입력받고자 하는 때, 및 인증개시명령에 따라 인증을 진행하여 인증 성공 또는 인증실패를 판정한 때 중에서 선택된 적어도 하나의 시점에 기설정된 특정한 패턴으로 점등되고 소등됨으로써 별도의 표시부를 구비하지 않고도 동작 상태를 표시할 수도 있다.The plurality of light sources of the present invention according to another embodiment is to expose the color through the fingerprint contact surface using a blue, red or green LED. In addition, the light source is the power supply through the communication interface to start the operation, when receiving the authentication start command from the mobile terminal to receive the fingerprint input, and proceeds authentication according to the authentication start command, the authentication success or authentication When the failure is determined, the operation state may be displayed without having a separate display unit by being turned on and off in a predetermined specific pattern at at least one selected time point.
본 발명의 지문입력장치는 평판 형상의 광굴절기를 사용하여 전체 사이즈와 두께를 최소화함으로써 사용자가 휴대하기 좋고, 사용자의 태블릿과 같은 모바일 단말기에 접속하여 기설정된 제어명령을 받을 때만 지문 등록, 지문 인증을 수행함으로써 보안성을 강화하였다. 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
본 발명의 지문입력장치는 전체 크기를 작게 하였음에도 불구하고, 지문입력면을 최대로 함으로써 특징점을 충분히 확보할 수 있는 크기의 지문 이미지를 획득할 수 있다. Although the fingerprint input device of the present invention has a smaller overall size, the fingerprint input device can obtain a fingerprint image having a size sufficient to secure a feature point by maximizing the fingerprint input surface.
또한, 본 발명의 지문입력장치는 크기를 작게 하였음에도 불구하고, 광학식 지문 인증에 필요한 모든 구성을 내장하여 입력된 지문과 관련된 정보나 이미지가 지문 등록이나 인증과정에서 외부로 유출되지 않도록 하였으며, 등록된 지문의 템플릿은 암호처리하여 내부 메모리에 저장함으로써 보안성을 강화하였다.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.
도 1은 종래의 광학식 지문입력방법의 설명에 제공되는 개념도,1 is a conceptual diagram provided to explain a conventional optical fingerprint input method;
도 2는 모바일 단말기에 연결된 본 발명의 지문입력장치의 사시도, 2 is a perspective view of a fingerprint input device of the present invention connected to a mobile terminal;
도 3은 본 발명의 지문입력장치의 블록도, 그리고3 is a block diagram of a fingerprint input device of the present invention, and
도 4는 본 발명의 지문입력장치의 지문 이미지 생성과정의 설명에 제공되는 단면도이다. 4 is a cross-sectional view provided for explaining a fingerprint image generation process of the fingerprint input device of the present invention.
이하 도면을 참조하여 본 발명을 더욱 상세히 설명한다.Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.
도 2 내지 도 4를 참조하면, 본 발명의 지문입력장치(200)는 지문접촉면(211a)에 접촉한 사용자 지문으로부터 지문 이미지를 획득하여 템플릿으로 등록한 다음, 개인 인증이 필요할 때 등록한 사용자에 대한 지문인증을 수행한다. 지문입력장치(200)는 모바일 단말기(10)에 연결할 수 있으며, 모바일 단말기(10)의 제어에 따라 지문 등록, 지문 인증 등을 수행한다. 2 to 4, the fingerprint input apparatus 200 of the present invention obtains a fingerprint image from a user fingerprint in contact with the fingerprint contact surface 211a 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 200 may be connected to the mobile terminal 10, and performs fingerprint registration, fingerprint authentication, etc. under the control of the mobile terminal 10.
모바일 단말기(10)는 본 발명의 지문입력장치(200)를 대신하여 사용자 인터페이스 기능을 수행하고 외부 서버에 연결하는 등의 동작을 수행하는 단말기들이 해당하며, 본 발명의 지문입력과 관계없는 다른 주된 기능을 가진 것일 수 있다. 따라서 모바일 단말기(10)는 이미지나 텍스트를 표시할 수 있는 표시수단과 사용자 제어명령을 수신할 수 있는 입력수단을 구비해야 하며, 예를 들어, 소위 '태블릿' 또는 '스마트 폰'이라고 불리는 장치들이 본 발명의 모바일 단말기(10)에 해당할 수 있다. 도 2의 모바일 단말기(10)는 표시수단과 입력수단을 위해 터치패드(11)를 구비하고 있다. 모바일 단말기(10)는 아래에서 설명하는 지문입력장치(200)의 통신인터페이스(237)와 연결되는 통신 인터페이스를 구비해야 하며, 데이터 송수신과 함께 전원 공급이 가능한 유에스비(Universal Serial Bus) 또는 RS-232 등이 바람직하다. The mobile terminal 10 corresponds to terminals that perform a user interface function and connect to an external server on behalf of the fingerprint input device 200 of the present invention, and other principals not related to the fingerprint input of the present invention. It may have a function. Accordingly, the mobile terminal 10 should include display means for displaying an image or text and input means for receiving a user control command. For example, devices called so-called 'tablets' or 'smart phones' It may correspond to the mobile terminal 10 of the present invention. The mobile terminal 10 of FIG. 2 is provided with a touch pad 11 for display means and input means. The mobile terminal 10 should have a communication interface connected to the communication interface 237 of the fingerprint input device 200 described below, and can be supplied with a universal serial bus or RS-232 for data transmission and reception. Etc. are preferable.
본 발명의 지문입력장치(200)는 광학 유닛(210), 회로부(230) 및 이들을 수용할 하우징(250)을 포함한다. 도 2를 참조하면, 하우징(250)에는 사용자가 지문을 입력하기 위한 지문접촉창(251)이 상면에 형성되어 있고, 아래에서 설명하는 표시부(233)와 통신인터페이스(237)의 접속단자(237a)가 노출되어 마련된다. 지문접촉창(251)의 크기는 아래에서 설명하는 광굴절기(211)의 지문접촉면(211a)보다 작기 때문에 지문접촉창(251)에 의해 한 번에 입력되는 지문의 면적이 결정된다. 충분한 사용자 인증을 위해서는 대략 15 x 20mm 사이즈는 되어야 한다. 접속단자(237a)와 모바일 단말기(10) 사이에 통신 케이블(30)이 연결되어 지문입력장치(200)가 모바일 단말기(10)와 연결될 때, 지문입력장치(200)는 비로소 동작전원을 공급받는다. The fingerprint input device 200 of the present invention includes an optical unit 210, a circuit unit 230, and a housing 250 to accommodate them. 2, in the housing 250, a fingerprint contact window 251 for inputting a fingerprint by a user is formed on an upper surface thereof, and the connection terminal 237a of the display unit 233 and the communication interface 237 described below. ) Is exposed. Since the size of the fingerprint contact window 251 is smaller than the fingerprint contact surface 211a of the optical refraction machine 211 described below, the area of the fingerprint input at one time by the fingerprint contact window 251 is determined. It should be approximately 15 x 20mm in size for sufficient user authentication. When the communication cable 30 is connected between the connection terminal 237a and the mobile terminal 10 to connect the fingerprint input device 200 with the mobile terminal 10, the fingerprint input device 200 is not supplied with operating power. .
도 3을 참조하면, 광학 유닛(210)에는 광굴절기(211), 렌즈(213) 및 제1 미러(215)가 포함되며, 광굴절기(211)의 지문접촉면(211a)에 접촉한 사용자의 지문에 대한 지문 영상을 만든다. 광학 유닛(210)이 생성한 지문 영상은 회로부(230)의 이미지 센서(231)로 입력되어 결상된다. Referring to FIG. 3, the optical unit 210 includes an optical refractor 211, a lens 213, and a first mirror 215, and a user who contacts the fingerprint contact surface 211a of the optical refractor 211. Make a fingerprint image for your fingerprint. The fingerprint image generated by the optical unit 210 is input to the image sensor 231 of the circuit unit 230 to form an image.
광원(217)은 광굴절기(211)의 지문접촉면(211a)을 향해 광학식 지문 이미지 생성을 위한 광을 조사한다. 도 2에서처럼 광굴절기(211)의 두께가 얇고 광원(217)이 광굴절기(211)의 아래쪽에 근접하여 배치되는 경우에는, 광원(217)의 화각에 불구하고 광원(217)이 조명할 수 있는 면적이 제한될 수밖에 없기 때문에, 복수 개의 광원(217)을 일정한 간격으로 배치하여 지문접촉면(211a)을 비교적 균일하게 조명하는 것이 중요하다. The light source 217 irradiates light for generating an optical fingerprint image toward the fingerprint contact surface 211a of the optical refractor 211. As shown in FIG. 2, when the thickness of the photorefractor 211 is thin and the light source 217 is disposed close to the bottom of the photorefractor 211, the light source 217 may be illuminated despite the angle of view of the light source 217. Since the area that can be limited is limited, it is important to arrange the plurality of light sources 217 at regular intervals to illuminate the fingerprint contact surface 211a relatively uniformly.
이미지 센서(231)는 광굴절기(211)로부터 입사되는 지문 영상으로 디지털 지문 이미지를 생성하며, 렌즈(213)는 광굴절기(211)의 출사면에서 나오는 영상을 이미지 센서(231)에 결상한다. 렌즈(213)와 이미지 센서(231) 사이의 광 경로 상에 제1 미러(215)가 배치되어 광굴절기(211)로부터 출사되는 지문 영상의 경로를 일정한 각도(예컨대 90°) 변경시킴으로써 이미지 센서(231)를 광굴절기(211)와 나란하게 배치할 수 있게 되어 지문입력장치(200)가 충분히 납작하고 얇아질 수 있다. The image sensor 231 generates a digital fingerprint image from the fingerprint image incident from the photorefractor 211, and the lens 213 forms an image from the exit surface of the photorefractor 211 on the image sensor 231. do. The first mirror 215 is disposed on the optical path between the lens 213 and the image sensor 231 to change the path of the fingerprint image emitted from the optical refractor 211 by a certain angle (for example, 90 °). 231 may be disposed in parallel with the optical refraction machine 211, so that the fingerprint input device 200 may be sufficiently flat and thin.
렌즈(213)와 제1 미러(215)는 광굴절기(211)의 출사면(211b)과 이미지 센서(231) 사이의 광 경로를 형성하여, 광굴절기(211)로부터 출사되는 지문 영상(광)을 이미지 센서(231)로 입사시킨다. 도 2에는 렌즈(213)가 제1 미러(215) 전단에 배치된 것으로 도시하였으나 이러한 배치는 당연히 예시적인 것이며, 예를 들어 추가적인 미러가 렌즈(213) 앞이나 뒤에 배치될 수 있다. 렌즈(213)도 필요에 따라 복수 개를 사용할 수 있다. The lens 213 and the first mirror 215 form an optical path between the emission surface 211b of the optical refractor 211 and the image sensor 231, thereby providing a fingerprint image emitted from the optical refractor 211. Light) is incident on the image sensor 231. Although FIG. 2 shows the lens 213 disposed in front of the first mirror 215, this arrangement is, of course, illustrative, and for example, additional mirrors may be placed before or after the lens 213. A plurality of lenses 213 can also be used as necessary.
광굴절기(211)는 손가락(F)이 접촉하는 지문접촉면, 광원(217)에서 출사되는 광이 입사되는 광입사면 그리고 지문영상이 최종 출사되는 출사면을 포함하는 어떠한 종류의 광학 소자도 가능하다. 다만, 광굴절기(211)가 얇은 평판 형상으로 구현되어야 지문입력장치(200)가 판상으로 충분히 얇은 형태가 될 수 있다. 광굴절기(211)의 지문접촉면의 크기는 지문접촉창(251)에 대응되거나 더 큰 것이 좋다. 또한, 충분한 사용자 인증을 위해서, 지문접촉면은 대략 15 x 20mm 이상의 사이즈가 바람직하다. The optical refractor 211 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 217 is incident, and an exit surface to which the fingerprint image is finally emitted. Do. However, the optical refractor 211 may be implemented in a thin flat plate shape so that the fingerprint input device 200 may be sufficiently thin in a plate shape. The size of the fingerprint contact surface of the optical refractor 211 may correspond to or be larger than the fingerprint contact window 251. In addition, for sufficient user authentication, the fingerprint contact surface should preferably have a size of approximately 15 x 20 mm or more.
도 4의 광굴절기(211)는 본 발명의 광굴절기의 일 예이다. 도 4의 광굴절기(211)는 '윗면'에 지문접촉면(211a)이 배치되고, 지문접촉면(211a)에 수직인 '전면'에 출사면(211b)이 배치되어 있으며, 아랫면에 광입사면(211c)이 배치된 널판지 형상이다. 광굴절기(211)의 전면과 마주하는 뒷면(211d)은 광입사면(211c)과 일정한 크기의 내각(α)을 형성한다. 내각(α)의 배치는 도 4에 도시된 것처럼 광굴절기(211) 내에서 전반사된 지문 영상의 경로를 출사면(211b)으로 전반사시키기 위한 것이다. 광굴절기(211) 내에서의 지문 영상의 경로에 대해서는 아래에서 광원(217)을 설명하면서 다시 설명한다. The optical refractor 211 of FIG. 4 is an example of the optical refractor of the present invention. In the optical refractor 211 of FIG. 4, the fingerprint contact surface 211a is disposed on the 'upper surface', and the emission surface 211b is disposed on the 'front surface' perpendicular to the fingerprint contact surface 211a, and the light incident surface is disposed on the lower surface. It is a board-board shape in which 211c is disposed. The rear surface 211d facing the front surface of the optical refractor 211 forms a light incident surface 211c and an internal angle α having a predetermined size. The arrangement of the cabinet α is for total reflection of the path of the fingerprint image totally reflected in the optical refraction machine 211 to the exit surface 211b as shown in FIG. 4. The path of the fingerprint image in the photorefractor 211 will be described again with reference to the light source 217 below.
회로부(230)에는 광원(217), 이미지 센서(231), 표시부(233), 메모리(235), 통신인터페이스(237) 및 제어부(239)가 포함된다. 지문입력장치(200)는 모바일 단말기(10)로부터 전원을 공급받기 때문에 배터리나 전원장치를 내장할 필요가 없다. 회로부(230)는 평판 형상의 광굴절기(211)의 아래쪽에 지문접촉면(211a)과 평행하게 배치됨으로써, 지문입력장치(200)의 크기를 소형화하고 최적화한다. The circuit unit 230 includes a light source 217, an image sensor 231, a display unit 233, a memory 235, a communication interface 237, and a controller 239. Since the fingerprint input device 200 receives power from the mobile terminal 10, the fingerprint input device 200 does not need to include a battery or a power supply. The circuit unit 230 is disposed below the flat optical refractor 211 in parallel with the fingerprint contact surface 211a, thereby miniaturizing and optimizing the size of the fingerprint input device 200.
광원(217)은 광굴절기(211)의 광입사면(211c)과 대향하도록 배치되어, 광원(217)에서 출사되는 광은 광굴절기(211)의 광입사면(211c)으로 직접 입사된다. 이러한 배치에 의해 도 2의 지문입력장치(200)는 투과식(즉, 산란식)으로 지문 영상을 생성한다. 도 2에서, 광굴절기(211)의 아랫면 쪽에 광원(217)이 배치되어 광굴절기(211)의 아랫면이 광입사면이 된다. 광원(217)에서 출사되는 광은 광입사면(211c)에 수직으로 입사된다. The light source 217 is disposed to face the light incident surface 211c of the light refractor 211, so that light emitted from the light source 217 is directly incident on the light incident surface 211c of the light refractor 211. . By this arrangement, the fingerprint input apparatus 200 of FIG. 2 generates a fingerprint image in a transmissive (ie, scattering) manner. In FIG. 2, the light source 217 is disposed on the lower surface side of the optical refractor 211 so that the lower surface of the optical refractor 211 becomes a light incident surface. Light emitted from the light source 217 is incident on the light incident surface 211c perpendicularly.
광원(217)에서 출사된 광은 광입사면(211c)을 통과하면서 광굴절기(211)의 지문접촉면(211a)에 임계각보다 작은 각으로 입사되기 때문에, 지문 이미지는 지문접촉면(211a)에 접촉한 지문의 융선 부분에서 산란된 광에 의해 주로 형성되어 골이 어둡고 융선 부분이 밝게 나타나 콘트라스트(Contrast)가 좋은 이미지가 된다. 도 4를 참조하면, 광은 지문접촉면(211a)에서 산란 또는 반사되면서 지문 영상이 되고 광굴절기(211)의 광입사면(211c)과 뒷면(211d)에서 전반사된다. 이때, 광입사면(211c)과 뒷면(211d)은 내각(α)을 형성함으로써 광입사면(211c)에서 전반사된 지문 영상이 출사면(211b)을 향해 충분히 전반사될 수 있어야 한다. 출사면(211b)에서 출사된 지문영상은 렌즈(213)를 통해 모아져 제1 미러(215)에서 반사되어 이미지 센서(231)로 입사된다. Since the light emitted from the light source 217 passes through the light incident surface 211c and is incident on the fingerprint contact surface 211a of the optical refractor 211 at an angle smaller than the critical angle, the fingerprint image contacts the fingerprint contact surface 211a. Formed mainly by light scattered from the ridges of a fingerprint, the valleys are dark and the ridges appear bright, resulting in a good contrast. Referring to FIG. 4, light is scattered or reflected on the fingerprint contact surface 211a and becomes a fingerprint image, and is totally reflected on the light incident surface 211c and the back surface 211d of the optical refractor 211. At this time, the light incident surface 211c and the back surface 211d form an internal angle α so that the fingerprint image totally reflected from the light incident surface 211c can be sufficiently totally reflected toward the exit surface 211b. The fingerprint image emitted from the exit surface 211b is collected through the lens 213, reflected by the first mirror 215, and incident on the image sensor 231.
이미지 센서(231)는 광굴절기(211)의 출사면(211b)으로부터 출사되어 렌즈(213)를 통과한 지문 영상을 입력받아 지문 이미지를 생성하여, 메모리(235)에 저장하고 제어부(239)에게 제공한다. 이미지 센서(231)가 출사면(211b)에 대해 90° 꺽인 상태로 배치되어 있기 때문에 출사면(211b)과 이미지 센서(231) 사이에 제1 미러(215)가 필요하며, 이러한 배치를 통해 지문입력장치(200)가 소형화될 수 있다. The image sensor 231 receives a fingerprint image emitted from the exit surface 211b of the optical refractor 211 and passes through the lens 213 to generate a fingerprint image, and stores the fingerprint image in the memory 235 and the controller 239. To provide. Since the image sensor 231 is disposed at an angle of 90 ° with respect to the emission surface 211b, a first mirror 215 is required between the emission surface 211b and the image sensor 231. The input device 200 can be miniaturized.
표시부(233)는 지문입력장치(200)의 동작 상태를 사용자에게 표시하기 위한 표시수단으로서 다양한 형태의 표시 수단이 가능하다. 예를 들어 지문입력장치(200)를 소형화하기 위해, 표시부(233)는 '사용자에게 지문을 입력할 것을 요청하고 있음'을 표시하기 위한 한 개 또는 두 개의 엘이디로도 충분하다. 다만, 표시부(233)는 필수적인 구성이 아니다. The display unit 233 is a display unit for displaying the operation state of the fingerprint input apparatus 200 to the user, and may be various forms of display means. For example, in order to miniaturize the fingerprint input device 200, the display unit 233 may be sufficient as one or two LEDs to indicate that the user is requesting to input a fingerprint. However, the display unit 233 is not an essential configuration.
예를 들어, 광원(217)을 청색, 적색 또는 녹색 엘이디 등을 사용함으로써 표시부(233)을 대체할 수 있다. 지문입력을 위해 광원(217)을 점등시키면 지문접촉창(251)을 통해 엘이디의 색상이 비치게 되어 사용자는 지문입력장치(200)가 동작상태임을 알 수 있다. 나아가 통신 인터페이스(237)를 통해 전원이 공급되어 동작을 개시하는 시점, 모바일 단말기(10)로부터 지문 등록명령 또는 인증개시명령을 수신하여 지문을 입력받고자 하는 때, 지문 등록명령에 따라 지문등록을 완료한 때, 및 인증개시명령에 따라 인증을 진행하여 인증 성공 또는 인증실패를 판정한 때 중에서 선택된 적어도 하나의 시점에, 제어부(239)가 청색, 적색 또는 녹색의 광원(217)을 기설정된 특정한 패턴으로 점등하고 소등함으로써 별도의 표시부(233)를 구비하지 않고도 동작 상태를 표시할 수도 있다. For example, the display unit 233 may be replaced by using a blue, red, or green LED as the light source 217. When the light source 217 is turned on for the fingerprint input, the color of the LED is reflected through the fingerprint contact window 251 so that the user can know that the fingerprint input device 200 is in an operating state. Furthermore, when the power is supplied through the communication interface 237 to start the operation, when the fingerprint registration command or the authentication start command is received from the mobile terminal 10 and the fingerprint is input, the fingerprint registration is completed according to the fingerprint registration command. At a time, and at least one time point selected from when authentication is performed according to the authentication start command to determine authentication success or failure, the control unit 239 sets the blue, red, or green light source 217 in a predetermined pattern. By turning on and off, the operation state can be displayed without providing a separate display unit 233.
메모리(235)에는 이미지 센서(231)가 생성한 지문 이미지, 지문등록과정을 통해 등록된 지문의 템플릿(특징점 데이터) 및 인증이력정보 등이 저장되며, 이 밖에도 본 발명의 지문입력장치(200)의 각종 정보가 저장된다. 메모리(235)에 저장된 등록지문 템플릿 및/또는 지문 이미지는 일정한 일련번호 등으로 분류되어 검색할 수 있도록 저장된다. 메모리(235)에 저장되는 데이터는 제어부(239)에 의해 암호화되는 것이 바람직하다. The memory 235 stores a fingerprint image generated by the image sensor 231, a template (feature point data) of the fingerprint registered through the fingerprint registration process, authentication history information, and the like. In addition, the fingerprint input device 200 according to the present invention. Various information of is stored. The enrolled fingerprint template and / or fingerprint image stored in the memory 235 are stored to be classified and searched by a certain serial number or the like. The data stored in the memory 235 is preferably encrypted by the controller 239.
통신인터페이스(237)는 모바일 단말기(10)와의 통신 및 전원 공급을 위하여 유선 통신 인터페이스를 사용한다. 예를 들어 유에스비 또는 RS-232 등의 프로토콜을 사용할 수 있다. 통신인터페이스(237)는 하우징(250)의 일측에 노출된 접속단자(237a)를 구비한다. The communication interface 237 uses a wired communication interface for supplying power and communicating with the mobile terminal 10. For example, protocols such as USB or RS-232 can be used. The communication interface 237 has a connection terminal 237a exposed at one side of the housing 250.
제어부(239)는 본 발명의 지문입력장치(200)의 전반적인 동작을 제어한다. 제어부(239)는 우선 모바일 단말기(10)의 제어에 따라 특정 사용자(이하, 제1 사용자)에 대한 지문등록과 인증과정을 수행하고, 그 결과를 모바일 단말기(10)에게 제공한다. 다만, 지문입력장치(200)와 모바일 단말기(10)는 통신인터페이스(237)를 통해 상호 연결하기 때문에, 이하에서 제어부(239)와 모바일 단말기(10) 사이에 직접적인 통신이 있는 것처럼 설명되더라도 통신인터페이스(237)에 의해 송수신 되는 것으로 이해되어야 한다. The controller 239 controls the overall operation of the fingerprint input device 200 of the present invention. The controller 239 first performs a fingerprint registration and authentication process for a specific user (hereinafter referred to as a first user) under the control of the mobile terminal 10, and provides the result to the mobile terminal 10. However, since the fingerprint input device 200 and the mobile terminal 10 are connected to each other through the communication interface 237, the communication interface will be described below even if it is described as if there is direct communication between the control unit 239 and the mobile terminal 10. It should be understood that the transmission and reception by (237).
지문 등록Fingerprint registration
사용자 지문 등록은 모바일 단말기(10)의 요청에 의해 개시된다. 제어부(239)는 모바일 단말기(10)로부터 지문 등록명령을 받으면 광원(217)을 점등하여 지문 등록과정을 개시한다. 이때, 모바일 단말기(10)의 지문 등록명령에는 등록할 제1 사용자에 할당된 '식별코드'가 포함된다. User fingerprint registration is initiated at the request of the mobile terminal 10. When the controller 239 receives the fingerprint registration command from the mobile terminal 10, the controller 239 turns on the light source 217 to start the fingerprint registration process. At this time, the fingerprint registration command of the mobile terminal 10 includes the 'identification code' assigned to the first user to register.
지문이 입력되고, 광원(217)에서 출사된 광이 지문 영상으로 변경되어 출사면(211b)을 통해 출사되면, 이미지 센서(231)가 지문 영상을 디지털 지문 이미지로 변환한다. 제어부(239)는 ① 지문 이미지의 품질을 체크하고, ② 지문 이미지가 위조 지문인지 판단한다. 품질 체크에 문제가 없고 위조 지문이 아니면, 제어부(239)는 지문 이미지로부터 특징점을 추출하여 지문 템플릿을 생성한 다음 지문 등록명령에 포함되었던 '식별코드'를 매핑하여 메모리(235)에 저장한다. 제어부(239)는 지문 템플릿의 저장과 함께 모바일 단말기(10)에게 지문 등록명령에 따른 지문 등록완료를 통지함으로써, 지문 등록명령에 의해 개시된 제1 사용자에 대한 지문 등록을 완료한다. 메모리(235)에 저장하는 과정에서, 제어부(239)는 지문 템플릿을 일정한 암호코드로 암호화하여 저장할 수 있다.When a fingerprint is input and the light emitted from the light source 217 is changed into a fingerprint image and output through the emission surface 211b, the image sensor 231 converts the fingerprint image into a digital fingerprint image. The controller 239 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 controller 239 generates a fingerprint template by extracting feature points from the fingerprint image, and then maps the 'identification code' included in the fingerprint registration command and stores it in the memory 235. The controller 239 notifies the mobile terminal 10 of the fingerprint registration completion according to the fingerprint registration command together with storing the fingerprint template, thereby completing the fingerprint registration for the first user initiated by the fingerprint registration command. In the process of storing in the memory 235, the control unit 239 can encrypt and store the fingerprint template with a certain encryption code.
만약, 지문 이미지의 품질이 불량하거나 위조지문으로 판단되면, 제어부(239)는 에러 정보를 모바일 단말기(10)에게 제공하거나 표시부(233)를 통해 표시할 수 있으며, 에러 정보의 제공과 표시부(233)를 통한 표시를 모두 수행할 수도 있다. 지문 등록과정에서, ①의 품질 체크나 ②의 위조지문 판단은 필수적이 아니며, 선택적으로 적용할 수 있다. If the quality of the fingerprint image is poor or is determined to be a fake fingerprint, the controller 239 may provide the error information to the mobile terminal 10 or display it through the display unit 233, and provide the error information and display unit 233. You can also perform all of the display with). 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.
사용자 인증User authentication
사용자 인증도 모바일 단말기(10)의 요청에 의해 개시된다. 제어부(239)는 모바일 단말기(10)로부터 '인증개시명령'을 받으면 광원(217)을 점등하여 사용자 인증과정을 개시한다. 이때, 모바일 단말기(10)의 '인증개시명령'에는 인증 대상인 제1 사용자의 '식별코드'가 포함된다. User authentication is also initiated at the request of the mobile terminal 10. When the controller 239 receives the 'authentication start command' from the mobile terminal 10, the controller 239 turns on the light source 217 to start a user authentication process. At this time, the 'authentication start command' of the mobile terminal 10 includes the 'identification code' of the first user to be authenticated.
인증용 지문이 입력되고, 광원(217)에서 출사된 광이 지문 영상으로 변경되어 출사면(211b)출사면(211b)출사되면, 이미지 센서(231)가 지문 영상을 지문 이미지로 변환한다. 설명의 편리를 위해, 인증과정에서 이미지 센서(231)가 생성한 지문 이미지를 '인증용 지문 이미지'라 한다. When the fingerprint for authentication is input, and the light emitted from the light source 217 is changed to the fingerprint image and the emission surface 211b and the emission surface 211b are emitted, the image sensor 231 converts the fingerprint image into the fingerprint image. For convenience of description, the fingerprint image generated by the image sensor 231 during the authentication process is referred to as a 'fingerprint fingerprint image'.
제어부(239)는 인증용 지문 이미지의 품질을 체크하고, 인증용 지문 이미지가 위조 지문인지 판단한다. 품질 체크에 문제가 없고 위조 지문이 아니면, 제어부(239)는 인증용 지문 이미지로부터 특징점을 추출하고 메모리(235)로부터 인증개시명령상의 식별코드에 매핑된 지문 템플릿(즉, 제1 사용자의 지문 템플릿)을 추출하여 동일한지 비교한다. The controller 239 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 control unit 239 extracts the feature point from the fingerprint image for authentication and maps the fingerprint template (ie, the fingerprint template of the first user) to the identification code on the authentication start instruction from the memory 235. ) And compare them for equality.
제어부(239)는 인증용 특징점과 메모리(235)에서 추출한 지문 템플릿이 동일하면, 모바일 단말기(10)에게 인증성공을 통지함으로써, 인증개시명령에 의해 개시된 제1 사용자에 대한 인증과정을 종료한다. 만약, 인증용 특징점과 메모리(235)에서 추출한 지문 템플릿이 동일하지 않으면, 제어부(239)는 모바일 단말기(10)에게 인증실패를 통지함으로써, 인증개시명령에 의해 개시된 제1 사용자에 대한 인증과정을 종료한다.If the authentication feature point and the fingerprint template extracted from the memory 235 are the same, the controller 239 notifies the mobile terminal 10 of successful authentication, thereby terminating the authentication process for the first user initiated by the authentication start command. If the feature point for authentication and the fingerprint template extracted from the memory 235 are not the same, the controller 239 notifies the mobile terminal 10 of the authentication failure, thereby performing the authentication process for the first user initiated by the authentication start command. Quit.
만약, 지문 이미지의 품질이 불량하거나 위조지문으로 판단되면, 제어부(239)는 에러 정보를 모바일 단말기(10)에게 제공하거나 표시부(233)를 통해 표시할 수 있으며, 에러 정보의 제공과 표시부(233)를 통한 표시를 모두 수행할 수도 있다. 지문 인증과정에서, ①의 품질 체크나 ②의 위조지문 판단은 필수적이 아니며, 선택적으로 적용할 수 있다. If the quality of the fingerprint image is poor or is determined to be a fake fingerprint, the controller 239 may provide the error information to the mobile terminal 10 or display it through the display unit 233, and provide the error information and display unit 233. You can also perform all of the display with). 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.
지문 등록과정이나 지문 인증과정에서 제어부(239)는 모바일 단말기(10)에게 지문등록 완료, 인증 성공 또는 인증 실패를 통지할 뿐, 지문등록을 위해 생성한 지문 템플릿, 인증용 지문 템플릿 또는 등록된 지문 템플릿을 모바일 단말기(10)에게 제공하지 않는다. 따라서 지문입력장치(200)에 저장된 사용자의 지문 템플릿은 기본적으로 외부로 유출되지 않는다. 또한 메모리(235)에 저장된 지문 템플릿은 암호화되어 있기 때문에, 분실 등의 과정에서 메모리(235)에 저장된 지문 템플릿이 유출되더라도 그 내용을 확인하거나 변형할 수 없다. In the fingerprint registration process or the fingerprint authentication process, the controller 239 notifies the mobile terminal 10 of fingerprint registration completion, authentication success or authentication failure, and generates a fingerprint template, a fingerprint template for authentication, or a registered fingerprint. The template is not provided to the mobile terminal 10. Therefore, the fingerprint template of the user stored in the fingerprint input device 200 is basically not leaked to the outside. In addition, since the fingerprint template stored in the memory 235 is encrypted, even if the fingerprint template stored in the memory 235 is leaked in the process of loss or the like, the contents cannot be confirmed or modified.
이상에서는 본 발명의 바람직한 실시 예에 대하여 도시하고 설명하였지만, 본 발명은 상술한 특정의 실시 예에 한정되지 아니하며, 청구범위에서 청구하는 본 발명의 요지를 벗어남이 없이 당해 발명이 속하는 기술 분야에서 통상의 지식을 가진 자에 의해 다양한 변형실시가 가능한 것은 물론이고, 이러한 변형실시들은 본 발명의 기술적 사상이나 전망으로부터 개별적으로 이해되어서는 안 될 것이다.Although the above has been illustrated and described with respect to preferred embodiments of the present invention, the present invention is not limited to the above-described specific embodiments, 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 (5)
- 휴대용 광학식 지문입력장치에 있어서,In a portable optical fingerprint input device,지문접촉면에 접촉한 지문의 지문 영상을 생성하여 출력하는 광학 유닛; 및 An optical unit for generating and outputting a fingerprint image of the fingerprint in contact with the fingerprint contact surface; And상기 광학 유닛으로부터 상기 지문 영상을 입력받아 지문 이미지를 생성하고 사용자 인증을 수행하는 회로부를 포함하고, A circuit unit configured to receive the fingerprint image from the optical unit, generate a fingerprint image, and perform user authentication;상기 회로부는, The circuit portion,상기 광학 유닛으로부터 지문 영상을 입력받아 지문 이미지를 생성하는 이미지 센서; An image sensor which receives a fingerprint image from the optical unit and generates a fingerprint image;등록된 복수 개 지문의 지문 템플릿들이 저장되는 메모리; A memory in which fingerprint templates of a plurality of registered fingerprints are stored;모바일 단말기와 유선으로 연결되어 통신하고 상기 모바일 단말기로부터 전원을 공급받는 통신인터페이스; 및A communication interface connected by wire with a mobile terminal and receiving power from the mobile terminal; And상기 모바일 단말기의 제1 사용자에 대한 인증개시명령에 따라 상기 광학 유닛을 동작시키고, 상기 이미지 센서가 생성한 지문 이미지를 상기 메모리에 등록된 제1 사용자의 템플릿과 비교하여 인증을 수행하며, 상기 모바일 단말기에게 인증 결과를 통지하는 제어부를 포함하는 것을 특징으로 하는 휴대용 광학식 지문입력장치.The optical unit is operated according to an authentication start command for the first user of the mobile terminal, the fingerprint image generated by the image sensor is compared with a template of the first user registered in the memory, and the authentication is performed. And a control unit which notifies the terminal of the authentication result.
- 제1항에 있어서,The method of claim 1,상기 광학 유닛은, The optical unit,상면에 지문접촉면을 구비하고, 상기 상면과 연결된 전면에 상기 지문 영상이 출사되는 출사면을 구비한 평판 형상의 광굴절기;A flat optical refractor including a fingerprint contact surface on an upper surface and an emission surface on which a fingerprint image is emitted on a front surface connected to the upper surface;상기 광굴절기의 아래쪽에 일정한 간격으로 배치되어 상기 광굴절기의 아랫면을 통해 상기 지문접촉면으로 지문 입력을 위한 광을 조사하는 복수 개의 광원;A plurality of light sources disposed below the optical refractor at regular intervals to irradiate light for fingerprint input through the lower surface of the optical refractor to the fingerprint contact surface;상기 출사면과 이미지 센서 사이에 마련되어 상기 지문 영상을 상기 이미지 센서로 결상하는 렌즈; 및A lens provided between the exit surface and the image sensor to form the fingerprint image with the image sensor; And상기 이미지 센서를 상기 지문접촉면과 평행하게 배치할 수 있도록 상기 렌즈와 이미지 센서 사이에 배치되어 상기 렌즈를 통과한 지문 영상을 상기 이미지 센서로 반사시키는 제1 미러(Mirror)를 포함하여 상기 광학 유닛을 평판 형상으로 구현하는 것을 특징으로 하는 휴대용 광학식 지문입력장치.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. Portable optical fingerprint input device, characterized in that implemented in a flat plate shape.
- 제1항에 있어서,The method of claim 1,상기 광굴절기는, The optical refraction machine,상기 광원에서 출사된 광이 상기 접촉한 지문에 의해 산란 및 반사되면서 상기 지문 영상으로 전환시키는 상기 지문접촉면과,The fingerprint contact surface for converting the light emitted from the light source into the fingerprint image while being scattered and reflected by the contact fingerprint;상기 지문접촉면에 수직한 전면에 배치된 상기 출사면과, The exit surface disposed on a front surface perpendicular to the fingerprint contact surface;상기 복수 개의 광원과 대향하는 아랫면에 배치되고 상기 복수 개의 광원에서 출사된 광이 입사되고, 상기 지문접촉면에서 전환된 지문 영상을 전반사하는 광입사면과, A light incidence surface disposed on a lower surface of the plurality of light sources, the light incident from the plurality of light sources is incident, and totally reflecting a fingerprint image converted from the fingerprint contact surface;상기 광입사면과 내각을 형성하도록 경사지게 배치된 뒷면을 구비하며, It has a rear surface inclined to form the light incident surface and the inside,상기 내각은 상기 광입사면에서 전반사된 지문 영상을 상기 출사면을 향해 전반사시킬 수 있는 각도로 설정되는 것을 특징으로 하는 휴대용 광학식 지문입력장치.The cabinet is a portable optical fingerprint input device, characterized in that the angle set to the total reflection of the fingerprint image totally reflected from the light incident surface toward the exit surface.
- 제1항에 있어서,The method of claim 1,상기 통신인터페이스는 유에스비 또는 RS-232 직렬 통신 인터페이스로서, 상기 모바일 단말기를 연결하는 케이블이 접속하는 접속 단자를 구비하는 것을 특징으로 하는 휴대용 광학식 지문입력장치.The communication interface is a USB or RS-232 serial communication interface, characterized in that the portable optical fingerprint input device comprising a connection terminal to which the cable connecting the mobile terminal is connected.
- 제1항에 있어서,The method of claim 1,상기 복수 개의 광원은, The plurality of light sources,청색, 적색 또는 녹색 엘이디를 사용하여 상기 지문접촉면을 통해 색상이 노출되도록 하며, 상기 통신 인터페이스를 통해 전원이 공급되어 동작을 개시하는 시점, 상기 모바일 단말기로부터 인증개시명령을 수신하여 지문을 입력받고자 하는 때, 및 인증개시명령에 따라 인증을 진행하여 인증 성공 또는 인증실패를 판정한 때 중에서 선택된 적어도 하나의 시점에 특정한 패턴으로 점등되고 소등됨으로써 동작 상태를 표시하는 것을 특징으로 하는 휴대용 광학식 지문입력장치.The color is exposed through the fingerprint contact surface using a blue, red or green LED, and when power is supplied through the communication interface to start an operation, the fingerprint is received by receiving an authentication start command from the mobile terminal. And when the authentication is performed according to the authentication start command to determine whether the authentication succeeds or fails, the portable optical fingerprint input device is displayed by turning on and off in a specific pattern at at least one time point selected.
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