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KR20160117865A - A Fingerprint Identifier - Google Patents

A Fingerprint Identifier Download PDF

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Publication number
KR20160117865A
KR20160117865A KR1020150045766A KR20150045766A KR20160117865A KR 20160117865 A KR20160117865 A KR 20160117865A KR 1020150045766 A KR1020150045766 A KR 1020150045766A KR 20150045766 A KR20150045766 A KR 20150045766A KR 20160117865 A KR20160117865 A KR 20160117865A
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South Korea
Prior art keywords
light
contact surface
fingerprint
light source
photosensor
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KR1020150045766A
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Korean (ko)
Inventor
최규진
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서울바이오시스 주식회사
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Priority to KR1020150045766A priority Critical patent/KR20160117865A/en
Publication of KR20160117865A publication Critical patent/KR20160117865A/en

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    • G06K9/0004—
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/117—Identification of persons
    • G06K9/00046—

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  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Medical Informatics (AREA)
  • Biophysics (AREA)
  • Pathology (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Physics & Mathematics (AREA)
  • Molecular Biology (AREA)
  • Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Image Input (AREA)
  • Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a fingerprint recognition apparatus, and more particularly, to a fingerprint recognition apparatus capable of discriminating a fake fingerprint by acquiring information on a living body as well as a shape of a fingerprint using light beams of various wavelengths .
The present invention relates to a contact surface to which a fingerprint is contacted; A first light source for irradiating the contact surface with the first light; A first photosensor that measures the first light transmitted through the contact surface, reflected at the contact surface, or scattered at the contact surface; And a sensing unit that senses a state in which the fingerprint is in contact with the contact surface and a state in which the fingerprint does not touch the contact surface. When a state in which the fingerprint does not contact the fingerprint sensor is detected after the fingerprint is in contact with the contact surface by the sensing unit, A fingerprint recognition device for acquiring a first image in a first optical sensor.

Description

A fingerprint identification device,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a fingerprint recognition apparatus, and more particularly, to a fingerprint recognition apparatus capable of discriminating a fake fingerprint by acquiring information on a living body as well as a shape of a fingerprint using light beams of various wavelengths .

 A fingerprint recognition device is a device that identifies a person by recognizing a person's fingerprint. The fingerprint image acquisition method of the fingerprint recognition device includes an optical type, an ultrasonic type, a capacitance type, an electric field measurement type, and a heat sensing type.

The thermal sensing method acquires the fingerprint image by moving the finger on the heat sensor. It can detect dry fingerprints, has a small sensor size, and is cheap. However, it is not convenient for users because it requires skill.

Both capacitive and electric field measurement methods are semiconductor type fingerprint recognition devices. Semiconductor type is advantageous in that it can measure dried fingerprints, but has poor durability against moisture and sensor is very expensive.

On the other hand, optical sensors are cheap, but sensors are not influenced by moisture and can obtain excellent fingerprint images. However, since only the appearance of the fingerprint is judged mainly, the fingerprint of the dummy having the shape of the fingerprint, And is recognized as an image.

The fingerprint recognition device is installed for security. Even if the fingerprint is recognized as it is, there is a problem that security is weakened.

Conventionally, there has been developed a device capable of detecting the forgery through a method of detecting the reflection of the skin or the color of the skin to judge whether or not the image has been falsified or using the surface plasmon effect. However, There was a limit in strengthening.

In recent years, light emitting diodes have been developed, and a length capable of intensively emitting only light beams of a desired wavelength range has been opened, so that it has become possible to utilize not only visible light of a specific wavelength band but also ultraviolet light or infrared light.

However, even in the case of using a light emitting diode, a technique for obtaining a fingerprint image more clearly by using a diode which mainly emits light of a wavelength range having a good scattering characteristic mainly in a visible light region is mainly developed, However, it is a reality that the development of the technology that can distinguish the fingerprints that are made is not supported.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fingerprint recognition device capable of accurately discriminating whether or not a fingerprint is a forged fingerprint by utilizing characteristics of light different for each wavelength.

SUMMARY OF THE INVENTION The present invention has been conceived to solve the problems described above, and it is an object of the present invention to provide a fingerprint recognition apparatus and a fingerprint recognition apparatus which utilize light of a specific wavelength range of ultraviolet, infrared, A fingerprint recognition device and a fingerprint recognition method capable of accurately recognizing only a fingerprint of a living body.

In order to achieve the above-mentioned object, the present invention is to provide a fingerprint recognition apparatus and a fingerprint recognition method, which are capable of instantaneously recognizing a fingerprint by measuring the trace of oil formed on the contact surface of a fingerprint with ultraviolet rays, And a fingerprint recognition device for comparing the fingerprint image recognized by the fingerprint recognition device and determining that the fingerprint is a biometric fingerprint.

 More specifically, the present invention relates to a contact surface to which a fingerprint is contacted; A first light source for irradiating the contact surface with the first light; A second light source for irradiating the contact surface with second light having a peak wavelength different from the first light; And a first photosensor that measures the first light transmitted through the contact surface, reflected at the contact surface, or scattered at the contact surface; A second photosensor that measures the second light transmitted through the contact surface, reflected at the contact surface, or scattered at the contact surface; And judging means for comparing the first image obtained by the first photosensor and the second image obtained by the second photosensor to check authenticity of the fingerprint.

The first light source may be ultraviolet light.

The first light source may be external to the contact surface.

The first photosensor may be external to the contact surface.

The first photosensor may acquire a first image after the fingerprint is detached from the contact surface.

The second photosensor may acquire a second image with the fingerprint in contact with the contact surface.

The ultraviolet light may have a peak wavelength within 200 to 365 nm.

A cover for preventing external emission of ultraviolet rays may be provided on the outer side of the contact surface.

The light source side polarizing plate may be disposed in front of at least one of the first light source and the second light source, and the light sensor side polarizing plate may be disposed in front of at least one of the first light sensor and the second light sensor.

The light source-side polarizing plate and the optical sensor-side polarizing plate may be parallel to each other.

The first light source and the second light source are one light source, and the first light and the second light may be determined according to the type of the filter positioned in front of the light source.

The first photosensor and the second photosensor are one photosensor, and the type of the light to be measured can be determined according to the type of the filter located in front of the photosensor.

The first optical sensor and the second optical sensor are one optical sensor, and the wavelength of the light to be measured can be determined by filtering the signal measured by the optical sensor.

The present invention also relates to a contact surface to which a fingerprint is contacted; A first light source for irradiating the contact surface with the first light; And a first light sensor for measuring the first light transmitted through the contact surface, reflected at the contact surface, or scattered at the contact surface, the fingerprint recognition method comprising the steps of: And the first optical sensor measures the transmitted light, the reflected light, or the scattered light of the first light irradiated on the contact surface with the first optical sensor to obtain the first image.

The first light may include ultraviolet light.

Wherein the fingerprint recognition device comprises: a second light source for irradiating the contact surface with second light having a peak wavelength different from the first light; And a second photosensor for measuring a second light transmitted through the contact surface, reflected from the contact surface, or scattered at the contact surface, wherein the second photosensor is configured to measure the transmitted light of the second light irradiated on the contact surface, The reflected light or the scattered light can be measured by the second photosensor to obtain the second image.

The authenticity of the fingerprint can be determined by comparing the first image and the second image.

The present invention also relates to a contact surface to which a fingerprint is contacted; A first light source for irradiating the contact surface with the first light; A first photosensor that measures the first light transmitted through the contact surface, reflected at the contact surface, or scattered at the contact surface; And a sensing unit that senses a state in which the fingerprint is in contact with the contact surface and a state in which the fingerprint does not touch the contact surface. When a state in which the fingerprint does not contact the fingerprint sensor is detected after the fingerprint is in contact with the contact surface by the sensing unit, A fingerprint recognition device for acquiring a first image in a first optical sensor.

The first light may be ultraviolet light.

According to the present invention, fingerprint recognition can be performed immediately without the hassle of keeping the fingerprint long when optically recognizing the fingerprint.

According to the present invention, since the fingerprint is recognized on the basis of traces of body fluids such as oil or sweat secreted in the skin tissue in which the fingerprint is formed, it is possible to distinguish the false fingerprint that is not a living body.

In addition, according to the present invention, since the portion for fingerprint recognition can be continuously disinfected with light for recognizing the fingerprint, it is possible to maintain the cleanliness of the contact surface of the fingerprint that is in contact with various people.

The above and other objects, features and advantages of the present invention will be more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic view of a fingerprint recognition device according to the present invention,
FIG. 2 is a view schematically showing a fingerprint recognition state of the fingerprint recognition device of FIG. 1;
FIGS. 3 to 5 are views showing an example of the arrangement of a light source and an optical sensor of the fingerprint recognition device according to the present invention, and FIGS.
FIG. 6 is a diagram showing that the light has different information according to the angle of polarization when the polarized light passes through the skin.

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

It is to be understood that the present invention is not limited to the disclosed embodiments, but may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, It is provided to inform.

[First Embodiment]

FIG. 1 schematically shows a fingerprint recognition device according to the present invention, and FIG. 2 is a view schematically showing a fingerprint recognition state of the fingerprint recognition device of FIG.

Referring to these figures, the fingerprint recognition device includes a contact surface 20 on which the fingerprint 10 contacts, a first light source 41 for irradiating the contact surface with ultraviolet light as a first light, Or a first photosensor (51) for sensing scattered light to obtain a first image.

People's skin continuously produces sweat and oil. Therefore, when the finger is brought into contact with the contact surface 20 as shown in FIG. 1, the fingerprint is pressed against the contact surface 20, and when the finger is released, The trace 12 of oil or sweat remaining on the surface of the fingerprint remains on the surface of the fingerprint as shown.

The first light source 41 irradiates the trace 12 of the fingerprint on the contact surface 20 with ultraviolet light which is the first light and the first light sensor 51 senses the first light through the trace of the fingerprint, To acquire an image of. Since the image sensed by the first photosensor 51 is based on the trace of oil or sweat secreted from the living body, it is an image that is not generated by the fingerprint made by the dummy such as silicon. Accordingly, the first image sensed by the first light source 41 and the first optical sensor 51 can be regarded as a genuine biometric fingerprint.

The first light source 41 irradiates ultraviolet rays to the trace 12 that remains on the contact surface 20 in a state in which the finger is removed as shown in FIG. 2 after a person contacts the contact surface 20 as shown in FIG. And the first optical sensor 51 senses it to acquire a fingerprint image.

The shorter the wavelength of light, the better the scattering and the lower the transmittance. Especially, light of ultraviolet wavelength band is easy to image the traces of fingerprints because scattering occurs well on the traces of fingerprints. Therefore, the fingerprints remaining on the contact surface such as the mirror surface cause scattering of the ultraviolet rays (diffuse reflection), and when the scattered light is measured, the fingerprint image can be obtained from the trace of the fingerprint.

On the other hand, the oil or sweat remaining on the contact surface 20 is an advantageous environment for propagating various germs. Therefore, when the first light source 41 is ultraviolet light, it can be used continuously or intermittently, It is possible to sterilize by irradiating ultraviolet rays. That is, the first light for acquiring the fingerprint image from the fingerprint trace 12 can be used simultaneously for the purpose of sterilizing microorganisms or bacteria that can reproduce at the trace portion of the fingerprint.

2, the first light source 41 continuously or intermittently irradiates ultraviolet rays to the contact surface 20, and the first photosensor 51 detects the presence of a change in the image. When the contact surface is irradiated with ultraviolet rays, the contact surface can be sterilized. Further, when there is no change in the signal due to the light measured by the first optical sensor 51, no image acquisition is performed.

In this state, as shown in FIG. 1, when a human's finger enters the contact surface and then exits as shown in FIG. 2, the signal due to the light measured by the first photosensor 51 is changed. When the first optical sensor 51 senses a change in the signal, the image of the light measured by the first optical sensor is obtained after the change of the signal stops.

For example, when a finger of a person enters the contact surface, the amount of light entering the first photosensor 51 largely changes as compared with the case where the finger enters the contact surface. In this state, It is possible to confirm that the finger has escaped. After acquiring an image from the first photosensor after detecting the amount of light, a fingerprint image is obtained from a trace 12 of the fingerprint that has come out of contact with the contact surface. That is, it is possible to detect whether the fingerprint is in contact with the contact surface from the difference in the amount of light measured by the first optical sensor. The sensing means may be constructed in this way or in other ways. The description of other conventional implementations will be omitted.

The first light source 41 may be an LED that emits ultraviolet rays having a peak wavelength within a range of 200 to 400 nm, and may preferably have a peak wavelength within a range of 200 to 365 nm.

On the other hand, since the ultraviolet rays are not beneficial to the human body, the ultraviolet rays can be prevented from flowing out to the outside by placing the lid 30 as shown in the figure. At this time, the first light source 41 and the first photosensor 51 may be located on the cover 30.

According to such a fingerprint recognition system, a fingerprint can be recognized even if the finger is moved away from the contact surface in spite of the optical fingerprint recognition apparatus, and the fingerprint can be recognized based on the trace by the oil.

[Second Embodiment]

The present invention further includes a process of directly recognizing the shape of the fingerprint 10 in addition to recognizing the fingerprint traces 12 as in the first embodiment in the optical recognition of the fingerprint, It is possible to compare the images of the recognized fingerprints and make it possible to discriminate that the fingerprints are genuine fingerprints of the living body.

1 and 2, the fingerprint recognition device includes a contact surface 20 on which the fingerprint 10 contacts, a first light source 41 that emits ultraviolet light that is first light toward the contact surface, A second light source (42) for emitting visible light, which is second light toward the contact surface, with a first light sensor (51) for sensing a light reflected or scattered through the contact surface to acquire a first image, And a second photosensor 52 that senses light reflected or scattered through the contact surface to acquire a second image.

The second light source 42 and the second optical sensor 52 directly detect the ridge of the fingerprint 10 that is in contact with the contact surface 20 by optical sensing.

The second light source 42 emits light toward the fingerprint when the fingerprint is pressed on the contact surface 20 as shown in FIG. 1, and transmits the scattered light generated by the fingerprint ridge on the contact surface 20 to the second photosensor 52 to detect fingerprint images.

Therefore, according to the second embodiment, as shown in Fig. 1, the second image is obtained by optically detecting the shape of the fingerprint on the finger by utilizing the second light source and the second photosensor while the finger is pressed on the contact surface, The first image is acquired by optically detecting the shape of the trace fingerprint using the first light source and the first photosensor for the trace 12 remaining on the contact surface after the finger is separated from the contact surface.

The first image and the second image thus obtained are compared with each other in the judging means. After the comparison, it is possible to determine whether the fingerprint is a true fingerprint or a false fingerprint according to whether the two images are matched.

In the first and second embodiments, the image obtained by measuring the scattered light on the premise that the light irradiated toward the contact surface in the light source is scattered is exemplified, but it is not necessarily limited to such a method. For example, optical measurement methods of total reflection or transmission can be used. In the first and second embodiments, the light source and the optical sensor are separately configured. However, the first light source and the second light source may be configured integrally or integrally, The optical sensors may be configured as a single unit or as an integrated unit.

[Third Embodiment]

The first light source 41 and the first photosensor 51 are disposed outside the contact surface 20 and the second light source 42 and the second photosensor 52 are disposed on the outside of the contact surface 20. In the first and second embodiments, Are disposed on the inner side of the contact surface 20, these positions need not necessarily be so limited.

It is also possible to arrange the first light source 41 and the first photosensor 51 inside the contact surface 20 as shown in FIG. Such a configuration can acquire fingerprint images, for example, by scattering or reflection.

4, the first light source 41 is disposed inside the contact surface 20 and the first photosensor 51 is disposed outside the contact surface 20. Alternatively, as shown in FIG. 5, It is also possible that the light source 41 is disposed outside the contact surface 20 and the first photosensor 51 is disposed inside the contact surface. They can acquire fingerprint images in a transmissive or scattering manner.

In the case of the first and second embodiments (see FIGS. 1 and 2) and in the case of FIG. 3 of the third embodiment, it is preferable that the contact surface 20 is made of a material having high reflectivity with respect to ultraviolet rays. On the other hand, in the embodiment shown in Figs. 4 and 5 of the third embodiment, the material of the contact surface 20 is preferably a material having a high ultraviolet transmittance.

In the case of the second light source and the second optical sensor, various arrangements are possible according to the optical design.

[Fourth Embodiment]

In the first and second embodiments, the light source is separately classified into the first light source and the second light source, and the first optical sensor and the second optical sensor are separately distinguished from each other. However, the first light source and the second light source and / or the first light sensor and the second light sensor may be one light source and / or an optical sensor, or may be an integrated light source and / or an optical sensor.

For example, if a filter for filtering light of a specific wavelength band is provided in front of a light source that emits light having a broad spectrum, light of a desired wavelength range can be selectively irradiated to the contact surface. One light source having a broad spectrum from ultraviolet rays to visible rays and two different filters disposed in front of the light source can constitute the first light source and the second light source, respectively. The filter and the light source that pass the ultraviolet ray become the first light source, and the filter and the light source that passes the visible light become the second light source.

Likewise, if a filter for filtering light of a specific wavelength band is provided in front of a light sensor that senses a broad spectrum light, the light of a desired wavelength range can be selectively detected. One optical sensor for sensing a broad spectrum from ultraviolet to visible light and two different filters disposed in front of the optical source can constitute the first optical sensor and the second optical sensor, respectively. The filter and the optical sensor that pass the ultraviolet ray become the first optical sensor, and the filter and the optical sensor that passes the visible ray become the second optical sensor.

These filters can be selectively placed in front of the light source or the optical sensor depending on whether or not the finger is on the contact surface.

On the other hand, as an integrated light source, LEDs capable of emitting two lights having different peak wavelengths can be installed together. As an integrated light sensor, it is possible to detect both lights having different peak wavelengths, It is also possible to use an optical sensor which can be divided and imaged. In this case, when the LED that emits the first light is operated, the LED becomes the first light source, and when the LED that emits the second light operates, the second light source becomes the second light source. In the case of acquiring the image by the first light according to the signal processing method And becomes a first photosensor when acquiring an image by the second light.

[Fifth Embodiment]

According to the present invention, it is also possible to acquire clear fingerprint information by utilizing a polarization filter as well as acquiring two images in different ways simply by the wavelength band.

For example, a polarizing filter is disposed in front of a light source, and a polarizing filter is disposed in front of the optical sensor. When the angles of the polarized lights are parallel to each other, fingerprint information can be obtained more clearly.

FIG. 6 is a diagram showing that the light has different information according to the angle of polarization when the polarized light passes through the skin. As shown in the figure, light having the same polarization direction as that of the light to be irradiated out of the light reflected or scattered from the skin with respect to the polarization direction of the light irradiated to the skin has many information on the skin surface, The light that is formed corresponds to the optical information about the blood and the constituents inside the skin rather than the fingerprint of the skin because there is a lot of information about the light after the relative penetration into the skin.

Therefore, if the angles of the polarizations of the light source and the front of the optical sensor are made parallel to each other, more accurate fingerprint information can be secured.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It is obvious that it can be done. Although the embodiments of the present invention have been described in detail above, the effects of the present invention are not explicitly described and described, but it is needless to say that the effects that can be predicted by the configurations should also be recognized.

10: Fingerprint
12: Trail
20: contact surface
30: Cover
41: first light source
42: second light source
51: first optical sensor
52: second optical sensor

Claims (19)

A contact surface with which the fingerprint contacts;
A first light source for irradiating the contact surface with the first light;
A second light source for irradiating the contact surface with second light having a peak wavelength different from the first light; And
A first photosensor that measures the first light transmitted through the contact surface, reflected at the contact surface, or scattered at the contact surface;
A second photosensor that measures the second light transmitted through the contact surface, reflected at the contact surface, or scattered at the contact surface; And
Determining means for comparing the first image obtained by the first photosensor with the second image obtained by the second photosensor to confirm authenticity of the fingerprint;
And a fingerprint recognition device.
The method according to claim 1,
Wherein the first light source is ultraviolet light.
The method of claim 2,
Wherein the first light source is present outside the contact surface.
The method of claim 2,
Wherein the first optical sensor is located outside the contact surface.
The method of claim 2,
Wherein the first light sensor acquires a first image after the fingerprint is detached from the contact surface.
The method according to claim 1,
Wherein the second photosensor acquires a second image with the fingerprint in contact with the contact surface.
The method of claim 2,
Wherein the ultraviolet light has a peak wavelength within 200 to 365 nm.
The method of claim 2,
Wherein a cover for preventing external radiation of ultraviolet rays is provided outside the contact surface.
The method according to claim 1,
A light source side polarizing plate is provided in front of at least one of the first light source and the second light source,
Wherein the optical sensor-side polarizing plate is provided in front of at least one of the first photosensor and the second photosensor.
The method of claim 9,
Wherein the light source-side polarizer and the optical sensor-side polarizer are parallel to each other.
The method according to claim 1,
The first light source and the second light source are one light source,
Wherein the first light and the second light are determined according to a type of filter positioned in front of the light source.
The method according to claim 1,
Wherein the first optical sensor and the second optical sensor are one optical sensor,
Wherein the type of light to be measured is determined according to the type of filter positioned in front of the optical sensor.
The method according to claim 1,
Wherein the first optical sensor and the second optical sensor are one optical sensor,
Wherein the wavelength of the light to be measured is determined by filtering the signal measured by the optical sensor.
A contact surface with which the fingerprint contacts;
A first light source for irradiating the contact surface with the first light; And
And a first light sensor for measuring the first light transmitted through the contact surface, reflected at the contact surface, or scattered at the contact surface, the method comprising:
Wherein the first light sensor measures the transmitted light, the reflected light, or the scattered light of the first light irradiated to the contact surface by the first photosensor to obtain the first image after the fingerprint contacts and leaves the contact surface.
15. The method of claim 14,
Wherein the first light includes ultraviolet light.
15. The method of claim 14,
The fingerprint recognition device
A second light source for irradiating the contact surface with second light having a peak wavelength different from the first light; And a second photosensor that measures the second light transmitted through the contact surface, reflected at the contact surface, or scattered at the contact surface,
Wherein the second image is acquired by measuring the transmitted light, the reflected light, or the scattered light of the second light irradiated on the contact surface in a state in which the fingerprint is in contact with the contact surface, with the second photosensor.
18. The method of claim 16,
And comparing the first image with the second image to determine authenticity of the fingerprint.
A contact surface with which the fingerprint contacts;
A first light source for irradiating the contact surface with the first light;
A first photosensor that measures the first light transmitted through the contact surface, reflected at the contact surface, or scattered at the contact surface; And
And sensing means for sensing a state in which the fingerprint is in contact with the contact surface and a state in which the fingerprint is not in contact with the contact surface,
Wherein the first light sensor acquires a first image when a state in which the fingerprint does not touch the contact surface is detected by the sensing means.
19. The method of claim 18,
Wherein the first light is ultraviolet light.
KR1020150045766A 2015-03-31 2015-03-31 A Fingerprint Identifier KR20160117865A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101965749B1 (en) 2018-05-18 2019-04-04 주식회사 디젠트 Camera based contactless fingerprint reader
US10804501B2 (en) 2018-02-12 2020-10-13 Samsung Display Co., Ltd. Display device including fingerprint recognition area

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10804501B2 (en) 2018-02-12 2020-10-13 Samsung Display Co., Ltd. Display device including fingerprint recognition area
KR101965749B1 (en) 2018-05-18 2019-04-04 주식회사 디젠트 Camera based contactless fingerprint reader

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