JPH04104377A - Finger print collation device - Google Patents
Finger print collation deviceInfo
- Publication number
- JPH04104377A JPH04104377A JP2221010A JP22101090A JPH04104377A JP H04104377 A JPH04104377 A JP H04104377A JP 2221010 A JP2221010 A JP 2221010A JP 22101090 A JP22101090 A JP 22101090A JP H04104377 A JPH04104377 A JP H04104377A
- Authority
- JP
- Japan
- Prior art keywords
- finger
- fingerprint
- finger print
- curved surface
- recessed surface
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000012795 verification Methods 0.000 claims description 18
- 238000003384 imaging method Methods 0.000 claims description 13
- 230000035807 sensation Effects 0.000 description 4
- 210000001015 abdomen Anatomy 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
Landscapes
- Collating Specific Patterns (AREA)
- Image Input (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、指紋を撮像して登録指紋と照合することによ
り、本人確認を行う為の指紋照合装置に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a fingerprint verification device for verifying an individual's identity by capturing an image of a fingerprint and comparing it with a registered fingerprint.
指紋は万人不同、終生不変の特徴を有するものであるか
ら、指紋照合により本人確認を行うことができる。この
指紋照合を自動化した指紋照合装置は、特定の人物のみ
入室が許可される電算機室や金庫室等への入室鍵の一つ
として利用されている。このような指紋照合装置に於け
るセキュリティの向上が要望されている。Since fingerprints have characteristics that are unique to everyone and remain unchanged throughout life, identity can be verified by comparing fingerprints. Fingerprint verification devices that automate this fingerprint verification are used as one of the entry keys to computer rooms, safes, etc. where only specific persons are allowed to enter. There is a demand for improved security in such fingerprint verification devices.
従来例の指紋照合装置の指載置台は、例えば、第３図に
示す構成を有するものであり、１１はプリズム型の指載
置台、ｌｌａは上面、ｌｌｂは斜面、Ｉｌｃは下面、１
２はガイドを示す。又１３は指、１４は爪を示す。この
指１３の先端をガイド１２に当接させて、指載置台１１
の上面１１ａに指を押し付けると、その上面１１ａに指
紋隆線が接触し、指紋谷線は非接触の状態となる。この
指載置台１１の下面１１ｃ側からランプ等により照明し
、斜面１１ｂ側からテレビカメラ等により撮像すること
により、指紋隆線パターンによる指紋を撮像することが
できる。この撮像指紋と、予め登録した指紋とを照合し
、照合一致の場合は、登録指紋の本人と判定し、例えば
、入室鍵を開けることになる。The finger rest of the conventional fingerprint collation device has, for example, the configuration shown in FIG.
2 indicates a guide. Further, 13 indicates a finger, and 14 indicates a nail. The tip of this finger 13 is brought into contact with the guide 12, and the finger rest 11
When a finger is pressed against the upper surface 11a, the fingerprint ridges come into contact with the upper surface 11a, and the fingerprint troughs are in a non-contact state. By illuminating the finger rest 11 with a lamp or the like from the lower surface 11c side and photographing it with a television camera or the like from the slope 11b side, it is possible to image the fingerprint based on the fingerprint ridge pattern. This captured fingerprint is compared with a previously registered fingerprint, and if they match, it is determined that the person is the person with the registered fingerprint, and, for example, the key to enter the room is unlocked.
指紋照合は、既に各種の構成が提案されており、例えば
、指紋の渦巻きの方向をベクトル化して指紋の特徴パタ
ーンとし、この特徴バクーンについて照合する方式等が
知られている。Various configurations have already been proposed for fingerprint verification. For example, a method is known in which the direction of the swirl of a fingerprint is vectorized to form a fingerprint characteristic pattern, and this characteristic pattern is compared.
前述の従来例に於いては、指数置台１１の上面１１ａ等
の平面に指を密接させた時に得られる指紋を登録してお
き、指数置台１１の平面状の上面１１ａに指を密接させ
た時に得られる指紋を撮像して、登録指紋と照合するも
のである。一般に指紋は各部に付着するものであり、又
この指紋を採取することは比較的容易である。この場合
の指紋は、平面上に指を密接した時に得られる場合が多
く、従って、この指紋を採取して紙等に印刷し、それを
指数置台１１上に密接させることにより、登録指紋との
照合一致が得られる。即ち、特定の人物になりすますこ
とができる欠点があった。In the above-mentioned conventional example, a fingerprint obtained when a finger is brought into close contact with a flat surface such as the top surface 11a of the index stand 11 is registered, and when the finger is brought into close contact with a flat top surface 11a of the index stand 11, the fingerprint is registered. The resulting fingerprint is imaged and compared with registered fingerprints. Fingerprints are generally attached to various parts of the body, and it is relatively easy to collect these fingerprints. Fingerprints in this case are often obtained when the finger is placed closely on a flat surface. Therefore, by taking this fingerprint, printing it on paper, etc., and placing it closely on the index stand 11, it is possible to compare it with the registered fingerprint. A matching match is obtained. That is, there is a drawback that it is possible to impersonate a specific person.
このような悪用を防止する為に、生体識別手段を設けた
構成も知られている。この生体識別手段ば、指先の温度
や指数置台１１に指を押し付けることによる指の色調の
変化等を検出するものであり、指紋を印刷した紙等は生
体反応がないから、前述のような悪用を防止することが
できる。In order to prevent such misuse, a configuration in which a biometric identification means is provided is also known. This biometric identification means detects the temperature of the fingertip and changes in the color tone of the finger caused by pressing the finger against the index stand 11, and since there is no biological reaction with paper on which fingerprints are printed, it cannot be misused as mentioned above. can be prevented.
このような生体識別手段の詳細は秘密にしているもので
あるが、試行を繰り返すことにより、生体識別手段を探
り当てて、温度や色調変化等を偽装するごとが可能であ
るから、生体識別手段を設けるだけでは、充分なセキュ
リティを得ることができないものである。The details of such biometric identification means are kept secret, but by repeating trials, it is possible to discover the biometric identification method and falsify temperature, color tone changes, etc. Mere provision of such a system does not provide sufficient security.
又テレビカメラ等により撮像した指紋と、登録指紋との
照合を行う場合に、撮像指紋と登録指紋との位置合わせ
を行う必要があり、従って、指数置台１１の上面１１ａ
の指の位置を規定するガイド１２が設けられている。こ
のガイド１２は、指の先端位置と幅方向の位置とを規定
するＵ字状の形状の場合が多いが、爪１４の伸びによる
前後方向の位置ずれが生じる欠点があり、父権の太さに
よる横方向の位置ずれが生じることになる。又身長の違
い等による指数置台１１の上面１．１ ａに対する指の
角度が相違し、正確な指紋を撮像することができない欠
点があった。Furthermore, when comparing a fingerprint imaged by a television camera or the like with a registered fingerprint, it is necessary to align the imaged fingerprint and the registered fingerprint.
A guide 12 is provided to define the position of the finger. This guide 12 is often U-shaped, which defines the position of the tip of the finger and the position in the width direction. Lateral displacement will occur. Furthermore, the angle of the fingers with respect to the top surface 1.1a of the index stand 11 differs due to differences in height, etc., making it impossible to accurately image fingerprints.
前述のように、従来例の指紋照合装置は、悪用を防止す
る手段が充分でなく、且つ指紋撮像の安定性が充分でな
い欠点があった。As mentioned above, conventional fingerprint verification devices have the drawbacks that there are insufficient means to prevent misuse and that the stability of fingerprint imaging is insufficient.
本発明は、指紋撮像位置を安定化し、且つ指紋照合の悪
用を防止することを目的とするものである。The present invention aims to stabilize the fingerprint imaging position and prevent misuse of fingerprint verification.
〔課題を解決するための手段］
本発明の指紋照合装置は、第１図を参照して説明すると
、
指の腹部分と指先部分とを含む曲面に適合した凹曲面２
を上面に形成したプリズム型の指数置台１と、この指数
置台１の凹曲面２上に形成された指紋を撮像するテレビ
カメラ等の撮像装置３と、この撮像装置３により撮像し
た指紋と、指紋登録部３に登録されている指紋とを照合
する照合部５とを備えているものである。[Means for Solving the Problems] The fingerprint verification device of the present invention will be described with reference to FIG.
a prism-shaped index stand 1 formed on the top surface; an imaging device 3 such as a television camera that images a fingerprint formed on the concave curved surface 2 of the index stand 1; a fingerprint imaged by the imaging device 3; It is equipped with a verification unit 5 that compares the fingerprint with the fingerprint registered in the registration unit 3.
指数置台１の凹曲面２は、指先部分の曲面と指の腹部分
の曲面とを含む曲面に適合したものであり、指と指数置
台１との密接面積は、平面に指を押し付けた場合に比較
して広くなる。即ち、指先部分の曲面を含めて広面積に
わたる指紋を撮像することができ、又平面に展開できな
いものとなる。The concave curved surface 2 of the index stand 1 is adapted to a curved surface including the curved surface of the fingertip portion and the curved surface of the abdomen of the finger. It is comparatively wider. That is, the fingerprint can be imaged over a wide area including the curved surface of the fingertip, and cannot be developed on a flat surface.
このような指紋を指紋登録部４に登録しておいて照合す
ることにより、平面上の採取指紋を悪用できないように
することができる。By registering such fingerprints in the fingerprint registration unit 4 and comparing them, it is possible to prevent the collected fingerprints on a flat surface from being misused.
又凹曲面２は１、指先部分の曲面にも適合しているもの
であるから、爪が当接しない深さに設定することにより
、爪の伸びによる位置ずれが生じないことになり、指数
置台１上の指の位置を安定化することができる。In addition, since the concave curved surface 2 conforms to the curved surface of the fingertip portion, by setting the depth so that the nail does not come into contact with it, positional deviation due to the extension of the nail will not occur, and the index stand The position of the finger on 1 can be stabilized.
以下図面を参照して本発明の実施例について詳細に説明
する。Embodiments of the present invention will be described in detail below with reference to the drawings.
第１図は本発明の詳細な説明図であり、１はプリズム型
の指数置台、１ａは上面、１ｂは傾斜面、１ｃは下面、
２は凹曲面、３は撮像装置、４は指紋登録部、５は照合
部、６は画像処理部、７は指紋照合制御部、８ばランプ
、９は指を示ず。FIG. 1 is a detailed explanatory diagram of the present invention, in which 1 is a prism-type index stand, 1a is an upper surface, 1b is an inclined surface, 1c is a lower surface,
2 is a concave curved surface, 3 is an imaging device, 4 is a fingerprint registration unit, 5 is a verification unit, 6 is an image processing unit, 7 is a fingerprint verification control unit, 8 is a lamp, and 9 does not show a finger.
指数置台１の上面１ａに形成した凹曲面２は、第２図の
斜視図にも示すように、指９の指先部分９ａの曲面と腹
部分９ｂの曲面とに適合する形状を有するものである。The concave curved surface 2 formed on the upper surface 1a of the index stand 1 has a shape that matches the curved surface of the fingertip portion 9a and the curved surface of the belly portion 9b of the finger 9, as also shown in the perspective view of FIG.
即ち、指９の指先部分９ａが接触し得る半球面状部２ａ
と、指９の腹部分９ｂが接触し得る半円筒状部２ｂとか
らなるものである。That is, the hemispherical portion 2a with which the fingertip portion 9a of the finger 9 can come into contact.
and a semi-cylindrical portion 2b with which the pad 9b of the finger 9 can come into contact.
この指数置台１の凹曲面２内に指９を載せて押し伺１．
Ｊることにより、指紋隆線が凹曲面２に接触することに
なる。この凹曲面２部分を指数置台１の下面ＩＣ側から
ランプ８により照明し、テレビカメラ等の撮像装置３に
より斜面１ｂ側から、凹曲面２に密接されて形成された
指紋を撮像し、指紋照合制御部７の画像処理部６により
撮像装置３からの画像信号を処理し、撮像指紋を照合部
５に加え、指紋登録部４に登録された指紋と順次照合を
行い、照合一致の場合に、指紋登録を行った特定の人物
と判定して判定信号を出力し、例えば、入室鍵を開ける
ことになる。又ランプ８０点灯や撮像装置３の動作は、
指紋照合制御部７から制御することができる。Place your finger 9 on the concave curved surface 2 of this index stand 1 and push it 1.
By doing so, the fingerprint ridge comes into contact with the concave curved surface 2. This concave curved surface 2 portion is illuminated by a lamp 8 from the lower IC side of the index stand 1, and a fingerprint formed in close contact with the concave curved surface 2 is imaged from the slope 1b side by an imaging device 3 such as a television camera, and the fingerprint is compared. The image processing unit 6 of the control unit 7 processes the image signal from the imaging device 3, adds the captured fingerprint to the matching unit 5, sequentially matches the fingerprint registered in the fingerprint registration unit 4, and if there is a match, It determines that the person is the specific person whose fingerprint has been registered, outputs a determination signal, and, for example, unlocks the key to enter the room. In addition, the lighting of the lamp 80 and the operation of the imaging device 3 are as follows.
It can be controlled from the fingerprint verification control section 7.
指数置台１の凹曲面２は、指先部分９ａと指の腹部分９
ｂとの曲面に適合したもので、この凹曲面２に指を載せ
ることにより、指の中心線と凹曲面２の中心線とが、垂
直面上で一致することになる。又前後方向については、
指先部分９ａが凹曲面２の半球面状部２ａに当接するこ
とにより位置決めされ、その場合の凹曲面２の深さを指
９の爪が接触しないように選定することにより、爪の伸
びによる位置ずれは生じないことになる。The concave curved surface 2 of the index stand 1 has a fingertip portion 9a and a finger pad portion 9.
By placing a finger on this concave curved surface 2, the center line of the finger and the center line of the concave curved surface 2 will coincide on the vertical plane. Also, regarding the front and back direction,
The fingertip portion 9a is positioned by coming into contact with the hemispherical portion 2a of the concave curved surface 2, and by selecting the depth of the concave curved surface 2 so that the nail of the finger 9 does not come into contact with it, the position is determined by the extension of the nail. There will be no deviation.
又凹曲面２内の指９の水平面内の回転については、凹曲
面２の中心線と指９の中心線とが平行となるように、凹
曲面２内に指９の腹部分９ｂが案内され、指９の腹部分
９ｂの接触感覚から正しい位置に位置決めされることに
なる。父権９の長さ方向の軸を中心とした指９の回転に
ついては、凹曲面２の半球面状部２ａに接触する指先部
分９ａの接触感覚と、半円筒状部２ｂに押し付けた時の
指９の腹部分９ｂの接触感覚とから、正しい位置に修正
されることになる。又凹曲面２内に指９の腹部分９ｂが
完全に接触する状態とすることができるから、身長の違
いによる指数置台１に対する指の載置角度の相違を防止
することができる。父権９の太さの相違については、凹
曲面２内に指９を押し付けた時の接触感覚により、凹曲
面２の底部中心と指９の腹部分９ｂの中心とが一致する
ように位置決めすることができる。Regarding the rotation of the finger 9 in the horizontal plane within the concave curved surface 2, the pad portion 9b of the finger 9 is guided within the concave curved surface 2 so that the center line of the concave curved surface 2 and the center line of the finger 9 are parallel. , the correct position is determined by the contact sensation of the pad 9b of the finger 9. Regarding the rotation of the finger 9 about the longitudinal axis of the paternity 9, the contact sensation of the fingertip portion 9a in contact with the hemispherical portion 2a of the concave curved surface 2, and the contact sensation of the fingertip portion 9a when pressed against the semicylindrical portion 2b. Based on the feeling of contact with the belly portion 9b of 9, the position is corrected. Furthermore, since the pads 9b of the fingers 9 can be brought into complete contact with the concave curved surface 2, differences in the angle at which the fingers are placed on the index stand 1 due to differences in height can be prevented. Regarding the difference in the thickness of the paternity 9, the finger 9 should be positioned so that the center of the bottom of the concave curved surface 2 and the center of the pad 9b of the finger 9 coincide with each other based on the contact sensation when the finger 9 is pressed into the concave curved surface 2. I can do it.
前述のように、指数置台１上に載せる指９の位置を安定
化することができる。As described above, the position of the finger 9 placed on the index stand 1 can be stabilized.
更に、指９の指先部分９ａの曲面の指紋隆線も凹曲面２
の半球面状部２ａに接触して、撮像装置３により撮像す
ることになり、この部分は平面に展開できないから、平
面−ヒからの採取指紋を悪用できないことを示すものと
なる。又指紋登録もこのような撮像指紋を用いて行うも
のであり、例えば、指紋照合制御部７を登録モードとし
、画像処理部６により処理された指紋を指紋登録部４に
登録することができる。その指紋登録部４は半導体メモ
リ等により構成され、複数の特定の人物の指紋を登録す
ることができるものであり、その登録指紋は完全なイメ
ージパターンとすることも可能であるが、前述のような
特徴パターンとして登録するごとにより、記憶容量を削
減することができる。Furthermore, the fingerprint ridges on the curved surface of the fingertip portion 9a of the finger 9 also form the concave curved surface 2.
Since this part cannot be developed on a flat surface, this shows that the fingerprint collected from the flat surface cannot be misused. Fingerprint registration is also performed using such an imaged fingerprint. For example, by setting the fingerprint comparison control section 7 to registration mode, the fingerprint processed by the image processing section 6 can be registered in the fingerprint registration section 4. The fingerprint registration unit 4 is composed of a semiconductor memory, etc., and is capable of registering the fingerprints of a plurality of specific persons.The registered fingerprints can be a complete image pattern, but as described above, By registering each characteristic pattern as a characteristic pattern, the storage capacity can be reduced.
又撮像装置３は、指先部分９ａの指紋隆線が接触する半
球面状部２ａの範囲も、指先方向に対して後方から撮像
するように、且つ照明角度と全反射角との関係から、指
数置台１の上面１ａとの角度θを設定するものである。In addition, the imaging device 3 is configured to image the range of the hemispherical portion 2a in contact with the fingerprint ridges of the fingertip portion 9a from behind with respect to the fingertip direction, and from the relationship between the illumination angle and the total reflection angle, This is to set the angle θ with respect to the upper surface 1a of the table 1.
又指数置台１に生体識別手段を付加することにより、更
にセキュリティの向上を図ることも可能である。Furthermore, by adding a biometric identification means to the index stand 1, it is possible to further improve security.
〔発明の効果］
以上説明したように、本発明は、指数置台１の上面１ａ
に凹曲面２を形成したことにより、指紋を撮像する為の
指の位置を安定化できる利点がある。更に、指紋の撮像
範囲を広くすると共に、指先部分９ａの指紋も撮像する
ことができるから、平面上の付着指紋とは異なる指紋と
なり、従って、指紋登録人物の付着指紋査採取して偽装
しようとしても、指紋照合は一致しないので、セキュリ
ティを向上することができる利点がある。[Effects of the Invention] As explained above, the present invention has the advantage that the upper surface 1a of the index stand 1
By forming the concave curved surface 2 on the surface, there is an advantage that the position of the finger for imaging the fingerprint can be stabilized. Furthermore, since the imaging range of the fingerprint is widened and the fingerprint of the fingertip portion 9a can also be imaged, the fingerprint will be different from the fingerprint attached on a flat surface. However, since fingerprint verification does not match, there is an advantage that security can be improved.
第１図は本発明の詳細な説明図、第２図は本発明の実施
例の指載置台の斜視図、第３図は従来例の要部側面図で
ある。
１は指載置台、１ａは上面、１ｂは斜面、１ｃは下面、
２は凹曲面、２ａは半球面状部、２ｂは半円筒状部、３
は撮像装置、４は指紋登録部、５は照合部、６は画像処
理部、７は指紋照合制御部、８はランプ、９は指である
。
特許出願人 富士通電装株式会社
代理人弁理士 相 谷 昭 司FIG. 1 is a detailed explanatory diagram of the present invention, FIG. 2 is a perspective view of a finger rest according to an embodiment of the present invention, and FIG. 3 is a side view of essential parts of a conventional example. 1 is a finger rest, 1a is a top surface, 1b is a slope, 1c is a bottom surface,
2 is a concave curved surface, 2a is a hemispherical part, 2b is a semicylindrical part, 3
4 is an imaging device, 4 is a fingerprint registration unit, 5 is a verification unit, 6 is an image processing unit, 7 is a fingerprint verification control unit, 8 is a lamp, and 9 is a finger. Patent applicant: Fujitsu Denso Co., Ltd. Representative patent attorney: Shoji Aitani
Claims (1)
２）を上面に形成したプリズム型の指載置台（１）と、 該指載置台（１）の前記凹曲面（２）上に形成された指
紋を撮像する撮像装置（３）と、 該撮像装置（３）により撮像した指紋と、指紋登録部（
４）に登録されている指紋とを照合する照合部（５）と
を備えた ことを特徴とする指紋照合装置。[Claims] A concave curved surface (
2) on the upper surface; an imaging device (3) for capturing an image of a fingerprint formed on the concave curved surface (2) of the finger mounting base (1); The fingerprint imaged by the device (3) and the fingerprint registration unit (
4) A fingerprint verification device comprising: a verification unit (5) that performs verification with a fingerprint registered in 4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2221010A JPH04104377A (en) | 1990-08-24 | 1990-08-24 | Finger print collation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2221010A JPH04104377A (en) | 1990-08-24 | 1990-08-24 | Finger print collation device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04104377A true JPH04104377A (en) | 1992-04-06 |
Family
ID=16760065
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2221010A Pending JPH04104377A (en) | 1990-08-24 | 1990-08-24 | Finger print collation device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04104377A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003536085A (en) * | 2000-06-09 | 2003-12-02 | アイデックス・エーエスエー | Sensor chips especially for fingerprint sensors |
| US9501685B2 (en) | 2013-02-22 | 2016-11-22 | Idex Asa | Integrated finger print sensor |
| US10095906B2 (en) | 2014-02-21 | 2018-10-09 | Idex Asa | Sensor employing overlapping grid lines and conductive probes for extending a sensing surface from the grid lines |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61255482A (en) * | 1985-05-08 | 1986-11-13 | Mitsubishi Electric Corp | Ruggedness detector |
| JPS62191816A (en) * | 1986-02-18 | 1987-08-22 | Fujitsu Ltd | Uneven surface information input device |
-
1990
- 1990-08-24 JP JP2221010A patent/JPH04104377A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61255482A (en) * | 1985-05-08 | 1986-11-13 | Mitsubishi Electric Corp | Ruggedness detector |
| JPS62191816A (en) * | 1986-02-18 | 1987-08-22 | Fujitsu Ltd | Uneven surface information input device |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003536085A (en) * | 2000-06-09 | 2003-12-02 | アイデックス・エーエスエー | Sensor chips especially for fingerprint sensors |
| US7848550B2 (en) | 2000-06-09 | 2010-12-07 | Idex Asa | Sensor unit, especially for fingerprint sensors |
| US9501685B2 (en) | 2013-02-22 | 2016-11-22 | Idex Asa | Integrated finger print sensor |
| US9881196B2 (en) | 2013-02-22 | 2018-01-30 | Idex Asa | Integrated finger print sensor |
| US10095906B2 (en) | 2014-02-21 | 2018-10-09 | Idex Asa | Sensor employing overlapping grid lines and conductive probes for extending a sensing surface from the grid lines |
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