JP3636117B2 - Fingerprint input device - Google Patents

Fingerprint input device Download PDF

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Publication number
JP3636117B2
JP3636117B2 JP2001263488A JP2001263488A JP3636117B2 JP 3636117 B2 JP3636117 B2 JP 3636117B2 JP 2001263488 A JP2001263488 A JP 2001263488A JP 2001263488 A JP2001263488 A JP 2001263488A JP 3636117 B2 JP3636117 B2 JP 3636117B2
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Japan
Prior art keywords
fingerprint
finger
sensor
pressing surface
finger pressing
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Expired - Fee Related
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JP2001263488A
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Japanese (ja)
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JP2003070769A (en
Inventor
暢生 ▲高▼橋
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NEC Corp
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NEC Corp
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Priority to JP2001263488A priority Critical patent/JP3636117B2/en
Priority to CNB021419744A priority patent/CN1201262C/en
Priority to TW091119772A priority patent/TW583594B/en
Priority to KR10-2002-0051785A priority patent/KR100517004B1/en
Publication of JP2003070769A publication Critical patent/JP2003070769A/en
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    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06VIMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V10/00Arrangements for image or video recognition or understanding
    • G06V10/10Image acquisition
    • G06V10/12Details of acquisition arrangements; Constructional details thereof
    • G06V10/14Optical characteristics of the device performing the acquisition or on the illumination arrangements
    • G06V10/147Details of sensors, e.g. sensor lenses

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  • Image Input (AREA)
  • Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
  • Indicating Or Recording The Presence, Absence, Or Direction Of Movement (AREA)
  • Length Measuring Devices By Optical Means (AREA)

Description

【0001】
【発明の属する技術分野】
本発明は、指紋を入力するための指紋入力装置に関する。
【0002】
【従来の技術】
従来から、セキュリティ確保等のために、個人に固有の情報である指紋画像を入力する装置として、指紋入力装置が使用されている。一般に、指紋入力装置は、指紋を画像として読み取るためのスキャナを備えており、操作者が自身の指を前記スキャナの走査面に位置させ、この状態で前記スキャナが指紋を読み取るようにしている。
【0003】
従来の指紋入力装置の問題の一つとして、操作者が前記スキャナに対して適切な位置に指を置くことが出来ず、そのため指紋を正確に読み取ることが出来ないことが知られている。
この原因の一つとして、指紋においてはその特徴点情報が主に指紋の渦を中心としたある程度広い面積に散らばっているのに対し、操作者は主に指の先端でスキャナに触れてしまうことが挙げられる。
【0004】
この理由としては、人間が指で何かを押す場合に力を加えやすい部位を自然に選ぶ結果、骨の長手方向に指を動かす、あるいは爪の真反対側を利用することが多いのに対し、指紋の主要部分は指の骨の長手方向に対して側面にあり、かつ爪の真反対から外れた部分にあるためと考えられる。
すなわち、人間は平面状に置かれた指紋スキャナ面に対して、ごく自然な動作として指の爪の反対側を押しつけてしまい、それよりも指の根元に近い、指の腹の主要部位を指紋スキャナに押しつけようとしない、あるいは押しつけることが出来ない。したがって、指紋を正確に読み取ることが出来ない。
【0005】
前記問題を解決する方法として、特開平4−367984号公報に記載された指紋入力装置では、回転軸5を中心として透明体2を回転可能に保持し、指の位置に応じて透明体2が回転軸5を軸として回転するようにして、指紋の読取をより確実にしている。
また、特開2000−293669号公報に記載された指紋入力装置では、指紋センサ4を有する指紋センサ本体2を、軸3を中心に回転可能に保持し、指紋の読取をより確実にしている。
【0006】
【発明が解決しようとする課題】
しかしながら、特開平4−367984号公報に記載された指紋入力装置は、透明体2の中心を回転軸5で保持している。したがって、透明体2が回転した際に、透明体2の指付け根側が筐体上面に突出するため、透明体2が指を押し上げるように働き、指が透明体から離れる方向に押し上げられるため、透明体に対する指の押し付けが不安定になり、したがって、指紋の読取が不安定になるという問題がある。
【0007】
また、特開2000−293669号公報に記載された指紋入力装置では、指押し付け面4aが箱体1内の奥に位置するため、指押し付け面4aに対する指の押し付けが行い難く、指紋の読取が不安定になるという問題がある。
また、前記各公報に記載された指紋入力装置は、いずれも平面状の指紋センサを使用しているため、大きな面積の指紋センサが必要となり、高価になるという問題がある。
【0008】
本発明は、指押し付け面に対する指の押しつけを安定に行うことができるようにすることを課題としている。
また、本発明は、小さな指紋センサを使用可能にすることによって、廉価に構成することを課題としている。
【0009】
【課題を解決するための手段】
本発明によれば、筐体と、筐体に設けられた穴と、前記穴の周辺部に取り付けられた支持部材と、外面に指押し付け面を有し前記支持部材に回転可能に取り付けられた指紋センサとを備え、前記指押し付け面は前記筐体外面と面一に構成されて成ることを特徴とする指紋入力装置が提供される。指紋センサを穴内部方向に押し込むように指押し付け面に指を押し付けて、指紋センサで指紋を読み取る。
【0010】
ここで、前記支持部材を回転中心として前記指紋センサが前記穴内部側へ回転したことを検出する回転検出手段を備え、前記指紋センサが所定位置へ回転したことを前記回転検出手段によって検出したとき、前記指紋センサは前記指押し付け面に押し付けられた指の指紋読取動作を実行するように構成してもよい。
また、前記指紋センサを前記穴外方向に付勢する付勢部材を備え、前記指で前記指押し付け面を押し付けた際に前記付勢部材の付勢力に抗して前記指紋センサが前記穴内に回転し得るように構成してもよい。
また、前記指紋センサは光を検出する光学的センサによって構成されると共に、前記指押し付け面に押し付けられた指に光を照射するための光源を前記穴内に配設して成り、前記指紋センサは前記指で反射した前記光源の光を検出することによって前記指の指紋を読み取るように構成してもよい。
【0011】
また、本発明によれば、筐体に取り付けられた支持部材と、外面に指押し付け面を有し前記支持部材に回転可能に取り付けられたセンサ保持部材と、前記センサ保持部材の回転軸に対して並行に配設された線状の指紋センサと、前記センサ保持部材が回転することによって前記指紋センサを前記指押し付け面にそって移動させる動作伝達機構とを備え、前記指紋センサは前記指押し付け面にそって移動しながら前記指押し付け面に押し付けられた指の指紋を読み取ることを特徴とする指紋入力装置が提供される。指紋センサはセンサ保持部の指押し付け面にそって移動しながら前記指押し付け面に押し付けられた指の指紋を読み取る。
【0012】
ここで、前記動作伝達機構は、その一端部が前記指紋センサに取り付けられると共に他端部が前記筐体に取り付けられた可撓性部材によって構成されて成り、前記可撓性部材は、前記センサ保持部材の回転に伴って前記センサ保持部材によって屈曲される部位が変化することにより、前記指紋センサを前記指押し付け面にそって移動させるように構成してもよい。
【0013】
また、前記センサ保持部材は、指を前記指押し付け面に押し付けることによって前記筐体の穴内に回転移動するように構成してもよい。
また、前記指紋センサを前記穴外方向に付勢する付勢部材を備え、前記指で前記指押し付け面を押し付けた際に前記付勢部材の付勢力に抗して前記センサ保持部材が回転して前記穴内に没入し得るように構成してもよい。
また、前記センサ保持部材の指押し付け面は、前記筐体外面と面一に構成してもよい。
【0014】
【発明の実施の形態】
以下、図面を用いて、本発明の実施の形態に係る指紋入力装置について説明する。
図1は本発明の第1の実施の形態に係る指紋入力装置を示す図である。図1(a)は指10を指紋センサ11の指押し付け面14に当接した状態を示す図で、図1(b)は指10で指紋センサ11を穴15内に押し込んだ状態を示す図である。
図2は、本第1の実施の形態に係る指紋入力装置の使用状態を示す正面図である。また、図3は本第1の実施の形態に係る指紋入力装置の斜視図であり、図3(a)は指押しつけ面14を押し付けていない状態を示す図、図3(b)は指押しつけ面14を押し付けている状態を示す図である。
【0015】
図1を参照すると、指紋入力装置は、外面を構成するパネル13を有する筐体16と、外面に透明な指押し付け面14を有する平面状の指紋センサ11と、筐体16内に設けられた穴15の周辺部に取り付けられ、指紋センサ11を回転可能に保持すると共に指紋センサ11をバネ機構(図示せず)で外面方向に付勢するヒンジ12を構成要素として有し、指押し付け面14は筐体16の外面13と面一に構成されている。
【0016】
前記バネ機構によって指紋センサ11が筐体16の外面13よりも突出しないように係止部材(図示せず)が設けられており、前記バネ機構の付勢力によって指紋センサ11又はヒンジ12は前記係止部材に当接して回転が停止し、指紋センサ11の指押し付け面14と筐体16の外面13が面一になるように構成されている。
指紋センサ11は、光学式、半導体式など、指押し付け面14に指10を密着させた状態で指10の指紋をスキャンして指紋画像を検出する方式であれば、いかなる方式の指紋センサであってもよい。
【0017】
支持部材を構成するヒンジ12には、指紋センサ11を筐体16外側方向に付勢する前記バネ機構が一体的に配設されている。また。ヒンジ12は、概略10度ないし50度の回転可動範囲を有し、指押し付け面14が指で押圧されていない状態では指押し付け面14を筐体16のパネル13と面一に保つと共に、指押し付け面14を操作者が指10で触れて穴15方向に押し込む場合には、前記付勢部材による適度な反発力をもって、指紋センサ11が穴15内部に押し込まれることを許容する。
【0018】
図2に示すように、ヒンジ12の位置は操作者が指紋入力する際に指の第一関節に相当する部位に設けられ、指押し付け面14の指先に相当する側が穴15内に押し込まれることにより、操作者が指10を軽く曲げた状態で指紋入力することが可能になる。
以上のように構成された本第1の実施の形態に係る指紋入力装置の動作を以下説明する。
【0019】
図1を参照すると、操作者は指10を指押し付け面14におき、そのまま指10を穴15方向に押し込む。指紋センサ11はヒンジ12を中心に回転して穴15内部に押し込まれ、所定位置(可動範囲の限界位置)で停止する。このとき、操作者の指紋は指押し付け面14に十分密着しているため、指紋センサ11は指紋を走査して指紋を正確に読み取ることが可能になる。
尚、指紋センサ11で常時スキャンして読み取る方式を採用し、適切な指紋画像データが読みとれた時点で、当該指の指紋を確定するようにすれば、指紋センサが所定位置まで回転したことを検出するための回転検出手段は不要になる。本実施の形態では、前記回転検出手段が不要な指紋センサの例を示している。
【0020】
また、操作者が自然な動作で指10を指押し付け面14に押し当てることが可能になる。何故ならば、図3に示す指紋入力装置において、人間は自然な動作としてまず、指をスキャナ装置上面に対して斜めに近づけ、その先端を指押し付け面14に接触させる。指押し付け面14はヒンジ12によりそのまま穴15内部に押し込まれるが、このときパネル13と指押し付け面14がヒンジ12で所定の角度を持つことから、操作者は図1のように指を軽く曲げた状態で指押し付け面14に沿わせることが出来るようになり、結果として指押し付け面14が操作者の指の腹全面に密着することになる。
【0021】
また人間は指を伸ばした状態よりも、握るように曲げた状態のほうが、指の腹に向かって力を加えやすいことから、平面状の動かない指押し付け面に押し当てる場合に比べ、押し付ける力を容易に加えることが可能になり、指押し付け面14に対して指10を良好に押し付ける異が可能になる。
また、指紋センサ11に対する指10の位置合わせおよび押下強度の調整が自然に行なえるという効果を奏する。何故ならば、人間は、指10を曲げた状態では接触面積の大きい状態をより自然なものとして感じることから、指10の第一関節をヒンジ12に合わせることで接触面積を最大にしようとするため、操作者はヒンジ12に生じる角度に対して指10の第一関節を合わせようと自ら指位置を調整するからである。
【0022】
また入力操作に対して前記付勢部材が機能して、適度な反発力を指に与えるため、指を指押し付け面14に押し付ける力を所定範囲に規定することができる。人間は力覚のフィードバックが働きにくい動かない対象に力を加える場合、どれほどの力で指を押し当てて良いのかが判らないため、仮にヒンジ12が存在せず、予めパネル13に対して角度を持った指紋スキャナ面14を用意した場合には、操作者は十分な指紋走査面積を得ることが出来ないほど弱く触れたり、あるいは指紋入力装置の破壊や操作者負傷の原因になるほど不必要に強く指を押しつけてしまうことが考えられるが、本実施の形態によればそのような事態を回避することが可能になる。
【0023】
図4は本発明の第2の実施の形態に係る指紋入力装置を示す図で、図1乃至図3と同一部分には同一符号を付している。図4(a)は指10を指紋センサ11の透明な指押し付け面14に当接した状態を示す図で、図4(b)は指10で指紋センサ11を穴15内に押し込んだ状態を示す図である。
前記第1の実施の形態では指紋センサが所定位置まで回転したことを検出するための回転検出手段が不要であったが、本第2の実施の形態では、前記回転検出手段を備えている点で前記第1の実施の形態と相違しており、他の構成は前記第1の実施の形態と同一である。
【0024】
図4を参照すると、回転検出手段を構成する検出スイッチ4は平面状の指紋センサ11が所定位置まで回転したことを検出するためのスイッチで、ヒンジ12が回転して指紋センサ11が所定位置まで回転した場合に、指紋センサ11が所定位置まで回転したことを検出して、そのことを指紋センサ11もしくは指紋スキャナ11を制御している制御機構に知らせる機能を有している。
【0025】
これにより、指紋入力装置は指10が適切な位置に置かれたことを知ることが出来るため、指紋センサ11を動作させるべきタイミングを知ることが出来る。ここで検出スイッチ4は、指紋センサ11の押し込まれた位置を検出するものであっても良いし、ヒンジ12の回転角度を検出するものであっても良い。
検出スイッチが、指紋センサ11が所定位置まで回転したことを検出したとき、指紋センサ11は、指押し付け面14に押し付けられた指10の指紋読取動作を実行する。
【0026】
図5は本発明の第3の実施の形態に係る指紋入力装置を示す図で、図1乃至図3と同一部分には同一符号を付している。図5(a)は指10を指紋センサ51の透明な指押し付け面14に当接した状態を示す図で、図4(b)は指10で指紋センサ51を穴15内に押し込んだ状態を示す図である。
図5を参照すると、平面状の指紋センサ51は光学的な検出方式によるものであって、主には指10の指紋の散乱光を検出することにより、指紋を読み取る類のものである。穴15内に配設された光源52は、指10に側面ないし上面より光を当てるためのものである。すなわち指10で指紋センサ51を押し込むことにより、光源52は指10に対して、当該検出方式に適した望ましい位置から光を当てることが出来るようになる。
【0027】
また検出スイッチ53を設け、前記第2の実施の形態と同様、指紋センサ51が指10により適切な位置まで押し込まれたことを検出するように構成している。この場合、指紋センサ51の動作だけでなく、光源52を動作させるべきタイミングも知ることが出来るため、検出スイッチで指紋センサが所定位置まで回転したことを検出して光源52を発光駆動すると共に指紋センサのスキャン動作を開始するようにすれば、省電力化が可能になる。
【0028】
図6は本発明の第4の実施の形態に係る指紋入力装置を示す図で、図1乃至図3と同一部分には同一符号を付している。図6(a)は透明な指押しつけ面14を押し付けていない状態を示す斜視図、図6(b)は透明なセンサ保持部材61の透明な指押し付け面14に指10を当接した状態を示す図で、図6(c)は指10でセンサ保持部材61を穴15内に押し込んだ状態を示す図である。
【0029】
図6を参照すると、本第4の実施の形態に係る指紋入力装置は、筐体16に取り付けられたヒンジ12と、透明な指押し付け面14を外面に有しヒンジ12に回転可能に取り付けられた透明なセンサ保持部材61と、センサ保持部材61の回転軸(ヒンジ12)に並行に配設された線状の指紋センサ62と、センサ保持部材61が回転することによって指紋センサ62を指押し付け面14にそって移動させる動作伝達機構63とを備え、指紋センサ62は指押し付け面14にそって移動しながら指押し付け面14に押し付けられた指10の指紋を読み取るように構成している。
【0030】
尚、センサ保持部材61は平板状の中空部材によって構成され、その内部に指紋センサ62を前記回転軸に直行する方向に摺動可能な状態で、センサ保持部材61の回転軸と並行に収容している。センサ保持部材61と指紋センサ62は指紋センサ部を構成している。
また、センサ保持部材61を穴15外方向に付勢する付勢部材を備え、指10で指押し付け面14を押し付けた際に前記付勢部材の付勢力に抗してセンサ保持部材61が回転して穴15内に没入し得るように構成されている。
【0031】
以上のように、少なくとも指押し付け面14側が透明部材によって構成されたセンサ保持部材61内には、センサ保持部材61の回転軸と平行に配設された線状のセンサ部62が摺動可能に配設されており、指紋センサ62が機械的に指紋面を走査することにより、指紋を読み取る類のものである。尚、指紋センサ62は必ずしもセンサ保持部材61内に配設する必要はなく、センサ保持部材61の下方(指押し付け面14の反対側)に配設するようにしてもよい。
【0032】
指押し付け面14にそって指紋センサ62を機械的に移動させる必要があるが、本実施の形態では動作伝達機構63により、センサ保持部材61の指10による押し込み動作を、指紋センサ62の移動に変換することが出来る。
すなわち、指10で指押し付け面14を押圧することによってセンサ保持部材61を穴15方向に没入させると、ヒンジ12を軸としてセンサ保持部材61が穴15内に回転移動する。センサ保持部材61の回転に伴い、指紋センサ62が指押し付け面14を内面側から走査し、指紋を読み取ることが出来る。
【0033】
動作伝達機構63としては、力を加えることによって屈曲するように撓み且つ前記力を取り除くことによって前記撓みが消滅して元の状態に復帰することが可能な可撓性部材を用いることができ、例えば、フレキシブル基板を使用することができる。
動力伝達機構として使用する可撓性部材の一端部に指紋センサ62を取付けると共に、他端部を取り付け部材64によって筐体16に取付ける。センサ保持部材61が穴15内に回転すると、センサ保持部材61の開放端部側によって前記可撓性部材が屈曲され、前記可撓性部材の一端部に取り付けられた指紋センサ62がセンサ保持部材61内で指押し付け面14にそって、センサ保持部材61の回転軸に平行な状態で移動する。これにより、指紋センサ62によって指押し付け面14に押し付けられた指の指紋がスキャンされて読み取られる。
【0034】
線状の指紋センサを用いることによってセンサ部を小型にすれば装置価格全体を低廉にする効果があることは容易に理解できると思われるが、線状の指紋センサを用いた場合に機械的走査を安価かつ確実に行なうことには困難を伴う。特に指紋センサ62に相当する線状の指紋センサを固定して、そこに指をこすりつけるようにするものは、こすりつけ動作が不確実であるため、安定的な画像を得ることが難しい。
【0035】
また指紋センサ62の動作を電動機構で行なう場合は、動作は確実になるものの、装置の機構が複雑になり、高額になる。また、スライド機構に指を載せて手の力でスライドさせるということも容易に考えられるが、指の置かれる状態が確実に一定ではないため正確な指紋読取は困難である。
これに対し、本第4の実施の形態によれば、指押し付け面14に対して指即ち指紋の位置が定まっており、またヒンジ12の確実な機械動作を指紋センサ62の移動に利用するため、安定した指紋入力を実現出来る。
【0036】
以上述べたように、本発明の実施の形態に係る指紋入力装置は、特に、筐体16と、筐体16に設けられた穴15と、穴15の周辺部に取り付けられたヒンジ12と、外面に指押し付け面14を有しヒンジ12に回転可能に取り付けられた指紋センサ11、51とを備え、指押し付け面14は筐体外面13と面一に構成されて成ることを特徴としている。
操作者は指10を指押し付け面14におき、そのまま押し込むことにより、スキャナによって構成された指紋センサ11、51はヒンジ12を中心に回転して穴15内部に押し込まれ、指紋センサ11、51は指紋を走査して読み取る。
【0037】
これにより、人間工学的な見地から、操作者が指10を指紋入力に適した位置に自然に置くことが可能になり又、操作者が指10を指押し付け面14上に押し付けて指紋を入力する際に、指10の先端部のみならず腹全体を指押し付け面14に密着させることが容易になるため、指紋の特徴点を十分に読み取ることが可能になる。
【0038】
また、本発明の実施の形態に係る指紋入力装置は、特に、センサ保持部材61の回転軸に並行に配設された線状の指紋センサ62と、センサ保持部材61が回転することに応答して指紋センサ62を指押し付け面14にそって移動させる動作伝達機構63とを備えているので、廉価な構成で、安定した指紋入力を実現することが可能になる。
【0039】
【発明の効果】
本発明によれば、指押し付け面に対する指の押しつけを安定に行うことが可能になる。
また、本発明によれば、小さな指紋センサが使用可能になり、廉価な構成で安定した指紋入力が可能になる。
【図面の簡単な説明】
【図1】 本発明の第1の実施の形態に係る指紋入力装置の使用状態を示す部分側面図である。
【図2】 本発明の第1の実施の形態に係る指紋入力装置の使用状態を示す正面図である。
【図3】 本発明の第1の実施の形態に係る指紋入力装置の斜視図である。
【図4】 本発明の第2の実施の形態に係る指紋入力装置の使用状態を示す部分側面図である。
【図5】 本発明の第3の実施の形態に係る指紋入力装置の使用状態を示す部分側面図である。
【図6】 本発明の第4の実施の形態に係る指紋入力装置の使用状態を示す部分側面図である。
【符号の説明】
4、53・・・検出スイッチ
10・・・指
11、51・・・指紋センサ
12・・・ヒンジ
13・・・パネル
14・・・指押し付け面
15・・・穴
16・・・筐体
52・・・光源
61・・・センサ保持部材
62・・・指紋センサ
63・・・動作伝達機構
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a fingerprint input device for inputting a fingerprint.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a fingerprint input device has been used as a device for inputting a fingerprint image, which is information unique to an individual, for ensuring security. Generally, a fingerprint input device includes a scanner for reading a fingerprint as an image. An operator places his / her finger on the scanning surface of the scanner, and the scanner reads the fingerprint in this state.
[0003]
As one of the problems of the conventional fingerprint input device, it is known that an operator cannot place a finger at an appropriate position with respect to the scanner, and thus the fingerprint cannot be read accurately.
One of the causes is that the feature point information in the fingerprint is scattered over a wide area mainly around the vortex of the fingerprint, whereas the operator mainly touches the scanner with the tip of the finger. Is mentioned.
[0004]
The reason for this is that when a human pushes something with his finger, he naturally selects a part that is easy to apply force, so he moves the finger in the longitudinal direction of the bone or uses the opposite side of the nail in many cases. This is probably because the main part of the fingerprint is on the side with respect to the longitudinal direction of the finger bone and is located on the part opposite to the nail.
That is, humans press the opposite side of the fingernail against the fingerprint scanner surface placed in a flat shape as a natural action, and the fingerprint of the main part of the finger belly closer to the base of the finger Do not try to press against the scanner, or cannot press. Therefore, the fingerprint cannot be read accurately.
[0005]
As a method for solving the above problem, in the fingerprint input device described in Japanese Patent Application Laid-Open No. 4-367984, the transparent body 2 is rotatably held around the rotation shaft 5, and the transparent body 2 is moved according to the position of the finger. The fingerprint is more reliably read by rotating about the rotation shaft 5.
Further, in the fingerprint input device described in Japanese Patent Laid-Open No. 2000-293669, the fingerprint sensor body 2 having the fingerprint sensor 4 is held rotatably about the shaft 3 to make the fingerprint reading more reliable.
[0006]
[Problems to be solved by the invention]
However, the fingerprint input device described in Japanese Patent Laid-Open No. 4-367984 holds the center of the transparent body 2 with the rotation shaft 5. Therefore, when the transparent body 2 rotates, the finger base side of the transparent body 2 protrudes from the upper surface of the casing, so that the transparent body 2 works to push up the finger and the finger is pushed up in the direction away from the transparent body. There is a problem that the pressing of the finger against the body becomes unstable, and thus the reading of the fingerprint becomes unstable.
[0007]
Further, in the fingerprint input device described in Japanese Patent Application Laid-Open No. 2000-293669, the finger pressing surface 4a is located in the interior of the box 1, so that it is difficult to press the finger against the finger pressing surface 4a and the fingerprint reading is performed. There is a problem of becoming unstable.
In addition, since the fingerprint input devices described in the above publications all use a planar fingerprint sensor, a fingerprint sensor with a large area is required, which is expensive.
[0008]
An object of the present invention is to enable a finger to be stably pressed against a finger pressing surface.
Another object of the present invention is to provide a low-cost configuration by enabling use of a small fingerprint sensor.
[0009]
[Means for Solving the Problems]
According to the present invention, the housing, the hole provided in the housing, the support member attached to the periphery of the hole, and the finger pressing surface on the outer surface are rotatably attached to the support member. There is provided a fingerprint input device including a fingerprint sensor, wherein the finger pressing surface is configured to be flush with the outer surface of the housing. A finger is pressed against the finger pressing surface so as to push the fingerprint sensor inwardly of the hole, and the fingerprint is read by the fingerprint sensor.
[0010]
Here, when the rotation detection unit detects that the fingerprint sensor has rotated to a predetermined position, the rotation detection unit detects that the fingerprint sensor has rotated to the inside of the hole with the support member as a rotation center. The fingerprint sensor may be configured to execute a fingerprint reading operation of a finger pressed against the finger pressing surface.
And an urging member for urging the fingerprint sensor in the direction of the hole. When the finger pressing surface is pressed with the finger, the fingerprint sensor is placed in the hole against the urging force of the urging member. You may comprise so that it can rotate.
The fingerprint sensor is constituted by an optical sensor for detecting light, and a light source for irradiating the finger pressed against the finger pressing surface is disposed in the hole. You may comprise so that the fingerprint of the said finger may be read by detecting the light of the said light source reflected with the said finger.
[0011]
Further, according to the present invention, the support member attached to the housing, the sensor holding member having a finger pressing surface on the outer surface and rotatably attached to the support member, and the rotation axis of the sensor holding member Linear fingerprint sensors arranged in parallel with each other, and an operation transmission mechanism for moving the fingerprint sensor along the finger pressing surface by rotating the sensor holding member, the fingerprint sensor pressing the finger A fingerprint input device is provided that reads a fingerprint of a finger pressed against the finger pressing surface while moving along the surface. The fingerprint sensor reads the fingerprint of the finger pressed against the finger pressing surface while moving along the finger pressing surface of the sensor holding unit.
[0012]
Here, the motion transmission mechanism is configured by a flexible member having one end attached to the fingerprint sensor and the other end attached to the housing. The flexible member is the sensor. The fingerprint sensor may be configured to move along the finger pressing surface by changing a portion bent by the sensor holding member as the holding member rotates.
[0013]
The sensor holding member may be configured to rotate and move into the hole of the housing by pressing a finger against the finger pressing surface.
And a biasing member that biases the fingerprint sensor in the direction of the hole, and the sensor holding member rotates against the biasing force of the biasing member when the finger pressing surface is pressed by the finger. It may be configured to be able to be immersed in the hole.
The finger pressing surface of the sensor holding member may be flush with the outer surface of the housing.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a fingerprint input device according to an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a diagram showing a fingerprint input device according to a first embodiment of the present invention. FIG. 1A is a diagram showing a state in which the finger 10 is in contact with the finger pressing surface 14 of the fingerprint sensor 11, and FIG. 1B is a diagram showing a state in which the fingerprint sensor 11 is pushed into the hole 15 with the finger 10. It is.
FIG. 2 is a front view showing a usage state of the fingerprint input device according to the first embodiment. 3 is a perspective view of the fingerprint input device according to the first embodiment. FIG. 3A is a diagram showing a state where the finger pressing surface 14 is not pressed, and FIG. It is a figure which shows the state which is pressing the surface.
[0015]
Referring to FIG. 1, the fingerprint input device is provided in a housing 16 having a panel 13 constituting an outer surface, a planar fingerprint sensor 11 having a transparent finger pressing surface 14 on the outer surface, and the housing 16. The finger pressing surface 14 is attached to the periphery of the hole 15 and has a hinge 12 as a constituent element that rotatably holds the fingerprint sensor 11 and urges the fingerprint sensor 11 in the outward direction by a spring mechanism (not shown). Is configured to be flush with the outer surface 13 of the housing 16.
[0016]
A locking member (not shown) is provided so that the fingerprint sensor 11 does not protrude from the outer surface 13 of the housing 16 by the spring mechanism, and the fingerprint sensor 11 or the hinge 12 is engaged by the biasing force of the spring mechanism. The rotation is stopped by coming into contact with the stop member, and the finger pressing surface 14 of the fingerprint sensor 11 and the outer surface 13 of the housing 16 are configured to be flush with each other.
The fingerprint sensor 11 is any type of fingerprint sensor, such as an optical type or a semiconductor type, as long as it scans the fingerprint of the finger 10 with the finger 10 in close contact with the finger pressing surface 14 to detect a fingerprint image. May be.
[0017]
The spring mechanism for urging the fingerprint sensor 11 toward the outside of the housing 16 is integrally provided on the hinge 12 constituting the support member. Also. The hinge 12 has a rotationally movable range of approximately 10 to 50 degrees, and keeps the finger pressing surface 14 flush with the panel 13 of the housing 16 in a state where the finger pressing surface 14 is not pressed by the finger. When the operator touches the pressing surface 14 with the finger 10 and pushes it in the direction of the hole 15, the fingerprint sensor 11 is allowed to be pushed into the hole 15 with an appropriate repulsive force by the biasing member.
[0018]
As shown in FIG. 2, the position of the hinge 12 is provided at a portion corresponding to the first joint of the finger when the operator inputs a fingerprint, and the side corresponding to the fingertip of the finger pressing surface 14 is pushed into the hole 15. Thus, the operator can input a fingerprint with the finger 10 bent lightly.
The operation of the fingerprint input apparatus according to the first embodiment configured as described above will be described below.
[0019]
Referring to FIG. 1, the operator places the finger 10 on the finger pressing surface 14 and directly pushes the finger 10 toward the hole 15. The fingerprint sensor 11 rotates around the hinge 12 and is pushed into the hole 15, and stops at a predetermined position (a limit position of the movable range). At this time, since the fingerprint of the operator is sufficiently adhered to the finger pressing surface 14, the fingerprint sensor 11 can scan the fingerprint and accurately read the fingerprint.
If the fingerprint sensor 11 scans and reads, and the appropriate fingerprint image data is read, the fingerprint of the finger can be determined to detect that the fingerprint sensor has rotated to a predetermined position. The rotation detecting means for doing so is not necessary. In the present embodiment, an example of a fingerprint sensor that does not require the rotation detecting means is shown.
[0020]
In addition, the operator can press the finger 10 against the finger pressing surface 14 with a natural motion. This is because, in the fingerprint input device shown in FIG. 3, as a natural operation, a human first brings a finger close to the upper surface of the scanner device obliquely, and makes the tip contact the finger pressing surface 14. The finger pressing surface 14 is directly pushed into the hole 15 by the hinge 12. At this time, since the panel 13 and the finger pressing surface 14 have a predetermined angle at the hinge 12, the operator bends the finger lightly as shown in FIG. As a result, the finger pressing surface 14 can be brought into close contact with the entire belly of the operator's finger.
[0021]
In addition, humans tend to apply force toward the belly of their fingers more easily than when they are stretched out, so the pressing force is greater than when pressing against a flat, non-moving finger pressing surface. Can be easily added, and a difference in which the finger 10 is favorably pressed against the finger pressing surface 14 becomes possible.
Further, there is an effect that the alignment of the finger 10 with respect to the fingerprint sensor 11 and the adjustment of the pressing strength can be performed naturally. This is because a human feels that a large contact area is more natural when the finger 10 is bent, and therefore tries to maximize the contact area by aligning the first joint of the finger 10 with the hinge 12. Therefore, the operator himself adjusts the finger position so as to align the first joint of the finger 10 with respect to the angle generated at the hinge 12.
[0022]
Further, since the biasing member functions in response to the input operation and gives an appropriate repulsive force to the finger, the force pressing the finger against the finger pressing surface 14 can be defined within a predetermined range. When humans apply force to a non-moving object that is difficult for force feedback to work, it is impossible to know how much force can be applied to the finger, so there is no hinge 12 and the angle with respect to the panel 13 in advance. When the fingerprint scanner surface 14 is provided, the operator touches it so weak that it cannot obtain a sufficient fingerprint scanning area, or it is unnecessarily strong enough to cause damage to the fingerprint input device or cause injury to the operator. Although it is conceivable to press the finger, according to the present embodiment, such a situation can be avoided.
[0023]
FIG. 4 is a diagram showing a fingerprint input apparatus according to the second embodiment of the present invention. The same reference numerals are given to the same parts as those in FIGS. 4A is a view showing a state in which the finger 10 is in contact with the transparent finger pressing surface 14 of the fingerprint sensor 11, and FIG. 4B is a state in which the fingerprint sensor 11 is pushed into the hole 15 with the finger 10. FIG.
In the first embodiment, the rotation detection means for detecting that the fingerprint sensor has rotated to a predetermined position is not necessary. However, in the second embodiment, the rotation detection means is provided. This is different from the first embodiment, and other configurations are the same as those of the first embodiment.
[0024]
Referring to FIG. 4, the detection switch 4 constituting the rotation detecting means is a switch for detecting that the planar fingerprint sensor 11 has rotated to a predetermined position. The hinge 12 rotates to bring the fingerprint sensor 11 to the predetermined position. In the case of rotation, it has a function of detecting that the fingerprint sensor 11 has been rotated to a predetermined position and notifying the control mechanism that controls the fingerprint sensor 11 or the fingerprint scanner 11.
[0025]
Thereby, since the fingerprint input device can know that the finger 10 is placed at an appropriate position, it can know the timing when the fingerprint sensor 11 should be operated. Here, the detection switch 4 may detect a position where the fingerprint sensor 11 is pushed in, or may detect a rotation angle of the hinge 12.
When the detection switch detects that the fingerprint sensor 11 has rotated to a predetermined position, the fingerprint sensor 11 performs a fingerprint reading operation of the finger 10 pressed against the finger pressing surface 14.
[0026]
FIG. 5 is a diagram showing a fingerprint input apparatus according to the third embodiment of the present invention. The same reference numerals are given to the same parts as those in FIGS. FIG. 5A is a diagram showing a state in which the finger 10 is in contact with the transparent finger pressing surface 14 of the fingerprint sensor 51, and FIG. 4B is a diagram in which the fingerprint sensor 51 is pushed into the hole 15 with the finger 10. FIG.
Referring to FIG. 5, the planar fingerprint sensor 51 is based on an optical detection method, and is mainly a type of reading a fingerprint by detecting scattered light of the finger 10. The light source 52 disposed in the hole 15 is for applying light to the finger 10 from the side surface or the upper surface. That is, by pressing the fingerprint sensor 51 with the finger 10, the light source 52 can irradiate the finger 10 with light from a desired position suitable for the detection method.
[0027]
Further, a detection switch 53 is provided to detect that the fingerprint sensor 51 is pushed to an appropriate position by the finger 10 as in the second embodiment. In this case, since it is possible to know not only the operation of the fingerprint sensor 51 but also the timing at which the light source 52 should be operated, the detection switch detects that the fingerprint sensor has been rotated to a predetermined position, drives the light source 52 to emit light, and prints the fingerprint. If the scanning operation of the sensor is started, power saving can be achieved.
[0028]
FIG. 6 is a diagram showing a fingerprint input apparatus according to the fourth embodiment of the present invention. The same reference numerals are given to the same parts as those in FIGS. FIG. 6A is a perspective view showing a state where the transparent finger pressing surface 14 is not pressed, and FIG. 6B shows a state where the finger 10 is in contact with the transparent finger pressing surface 14 of the transparent sensor holding member 61. FIG. 6C is a diagram showing a state where the sensor holding member 61 is pushed into the hole 15 with the finger 10.
[0029]
Referring to FIG. 6, the fingerprint input device according to the fourth embodiment has a hinge 12 attached to the housing 16 and a transparent finger pressing surface 14 on the outer surface, and is rotatably attached to the hinge 12. The transparent sensor holding member 61, the linear fingerprint sensor 62 arranged in parallel with the rotation axis (hinge 12) of the sensor holding member 61, and the finger pressing on the fingerprint sensor 62 as the sensor holding member 61 rotates. The fingerprint sensor 62 is configured to read the fingerprint of the finger 10 pressed against the finger pressing surface 14 while moving along the finger pressing surface 14.
[0030]
The sensor holding member 61 is constituted by a flat hollow member, and accommodates the fingerprint sensor 62 in parallel with the rotation axis of the sensor holding member 61 in a state in which the fingerprint sensor 62 can slide in a direction perpendicular to the rotation axis. ing. The sensor holding member 61 and the fingerprint sensor 62 constitute a fingerprint sensor unit.
The sensor holding member 61 is provided with a biasing member that biases the sensor holding member 61 outward from the hole 15, and the sensor holding member 61 rotates against the biasing force of the biasing member when the finger pressing surface 14 is pressed by the finger 10. Thus, it is configured to be able to be immersed in the hole 15.
[0031]
As described above, the linear sensor portion 62 disposed parallel to the rotation axis of the sensor holding member 61 is slidable in the sensor holding member 61 having at least the finger pressing surface 14 side made of a transparent member. The fingerprint sensor 62 mechanically scans the fingerprint surface to read the fingerprint. The fingerprint sensor 62 is not necessarily disposed in the sensor holding member 61, and may be disposed below the sensor holding member 61 (on the opposite side of the finger pressing surface 14).
[0032]
Although it is necessary to mechanically move the fingerprint sensor 62 along the finger pressing surface 14, in this embodiment, the operation transmitting mechanism 63 changes the pressing operation of the sensor holding member 61 by the finger 10 to the movement of the fingerprint sensor 62. Can be converted.
That is, when the sensor holding member 61 is immersed in the direction of the hole 15 by pressing the finger pressing surface 14 with the finger 10, the sensor holding member 61 rotates and moves into the hole 15 about the hinge 12. As the sensor holding member 61 rotates, the fingerprint sensor 62 can scan the finger pressing surface 14 from the inner surface side and read the fingerprint.
[0033]
As the motion transmission mechanism 63, a flexible member that can be bent by applying force and can be returned to the original state by removing the force by removing the force can be used. For example, a flexible substrate can be used.
A fingerprint sensor 62 is attached to one end portion of a flexible member used as a power transmission mechanism, and the other end portion is attached to the housing 16 by an attachment member 64. When the sensor holding member 61 rotates into the hole 15, the flexible member is bent by the open end side of the sensor holding member 61, and the fingerprint sensor 62 attached to one end of the flexible member is a sensor holding member. It moves along the finger pressing surface 14 in 61 in a state parallel to the rotation axis of the sensor holding member 61. Thereby, the fingerprint of the finger pressed against the finger pressing surface 14 by the fingerprint sensor 62 is scanned and read.
[0034]
Although it can be easily understood that using a linear fingerprint sensor to reduce the size of the sensor unit can reduce the overall price of the device, mechanical scanning is possible when a linear fingerprint sensor is used. It is difficult to carry out the operation inexpensively and reliably. In particular, a linear fingerprint sensor corresponding to the fingerprint sensor 62 is fixed and the finger is rubbed therewith, since the rubbing operation is uncertain, and it is difficult to obtain a stable image.
[0035]
When the operation of the fingerprint sensor 62 is performed by an electric mechanism, the operation is reliable, but the mechanism of the apparatus becomes complicated and expensive. Although it is easily conceivable to place a finger on the slide mechanism and slide it with the power of the hand, accurate fingerprint reading is difficult because the state where the finger is placed is not surely constant.
On the other hand, according to the fourth embodiment, the position of the finger, that is, the fingerprint, is fixed with respect to the finger pressing surface 14, and the reliable mechanical operation of the hinge 12 is used for the movement of the fingerprint sensor 62. Stable fingerprint input can be realized.
[0036]
As described above, in particular, the fingerprint input device according to the embodiment of the present invention includes the housing 16, the hole 15 provided in the housing 16, the hinge 12 attached to the periphery of the hole 15, The finger pressing surface 14 is provided with fingerprint sensors 11 and 51 rotatably attached to the hinge 12 and having a finger pressing surface 14 on the outer surface. The finger pressing surface 14 is configured to be flush with the outer surface 13 of the housing.
When the operator places the finger 10 on the finger pressing surface 14 and presses it as it is, the fingerprint sensors 11 and 51 constituted by the scanner rotate around the hinge 12 and are pushed into the hole 15, and the fingerprint sensors 11 and 51 are Scan and read fingerprints.
[0037]
As a result, from an ergonomic point of view, the operator can naturally place the finger 10 at a position suitable for fingerprint input, and the operator can press the finger 10 onto the finger pressing surface 14 to input the fingerprint. In doing so, it becomes easy to closely contact not only the tip portion of the finger 10 but also the entire belly to the finger pressing surface 14, so that the feature points of the fingerprint can be sufficiently read.
[0038]
The fingerprint input device according to the embodiment of the present invention is particularly responsive to the linear fingerprint sensor 62 disposed in parallel with the rotation axis of the sensor holding member 61 and the rotation of the sensor holding member 61. In addition, since it includes the motion transmission mechanism 63 that moves the fingerprint sensor 62 along the finger pressing surface 14, it is possible to realize stable fingerprint input with an inexpensive configuration.
[0039]
【The invention's effect】
According to the present invention, it is possible to stably press the finger against the finger pressing surface.
Further, according to the present invention, a small fingerprint sensor can be used, and stable fingerprint input can be performed with an inexpensive configuration.
[Brief description of the drawings]
FIG. 1 is a partial side view showing a usage state of a fingerprint input device according to a first embodiment of the invention.
FIG. 2 is a front view showing a usage state of the fingerprint input device according to the first embodiment of the invention.
FIG. 3 is a perspective view of the fingerprint input device according to the first embodiment of the invention.
FIG. 4 is a partial side view showing a usage state of a fingerprint input device according to a second embodiment of the invention.
FIG. 5 is a partial side view showing a usage state of a fingerprint input device according to a third embodiment of the invention.
FIG. 6 is a partial side view showing a usage state of a fingerprint input device according to a fourth embodiment of the invention.
[Explanation of symbols]
4, 53 ... detection switch 10 ... finger 11, 51 ... fingerprint sensor 12 ... hinge 13 ... panel 14 ... finger pressing surface 15 ... hole 16 ... casing 52 ... Light source 61 ... Sensor holding member 62 ... Fingerprint sensor 63 ... Motion transmission mechanism

Claims (7)

筐体と、前記筐体に設けられた穴と、前記穴の周辺部に取り付けられた支持部材と、前記筐体外面と面一に構成された指押し付け面を外面に有すると共に前記穴を覆うように前記支持部材に回転可能に取り付けられた指紋センサと、前記支持部材を回転中心として前記指紋センサが前記穴内部側へ回転したことを検出する回転検出手段とを備え、
前記指紋センサは光を検出する光学的センサによって構成されると共に、前記指押し付け面に押し付けられた指に光を照射するための光源を前記穴内に配設して成り、
前記指紋センサが前記穴内部側の所定位置へ回転したことを前記回転検出手段によって検出したときに前記光源を発光駆動し、前記指押し付け面に押し付けられた指に光を照射して、前記指紋センサは前記指押し付け面に押し付けられた指で反射した前記光源の光を検出することによって前記指の指紋を読み取ることを特徴とする指紋入力装置。
A casing, a hole provided in the casing, a support member attached to a peripheral portion of the hole, and a finger pressing surface configured to be flush with the outer surface of the casing and covering the hole A fingerprint sensor rotatably attached to the support member, and rotation detection means for detecting that the fingerprint sensor has rotated to the inside of the hole with the support member as a rotation center,
The fingerprint sensor is constituted by an optical sensor that detects light, and a light source for irradiating light on a finger pressed against the finger pressing surface is disposed in the hole.
When the rotation detecting means detects that the fingerprint sensor has rotated to a predetermined position inside the hole, the light source is driven to emit light, and light is applied to the finger pressed against the finger pressing surface , whereby the fingerprint The sensor reads the fingerprint of the finger by detecting the light of the light source reflected by the finger pressed against the finger pressing surface.
筐体に取り付けられた支持部材と、外面に指押し付け面を有し前記支持部材に回転可能に取り付けられたセンサ保持部材と、前記センサ保持部材の回転軸に対して並行に配設された線状の指紋センサと、前記センサ保持部材が回転することによって前記指紋センサを前記指押し付け面にそって移動させる動作伝達機構とを備え、前記指紋センサは前記指押し付け面にそって移動しながら前記指押し付け面に押し付けられた指の指紋を読み取ることを特徴とする指紋入力装置。  A support member attached to the housing, a sensor holding member having a finger pressing surface on the outer surface and rotatably attached to the support member, and a line disposed in parallel with the rotation axis of the sensor holding member And a motion transmission mechanism that moves the fingerprint sensor along the finger pressing surface by rotating the sensor holding member, and the fingerprint sensor moves along the finger pressing surface while moving. A fingerprint input device that reads a fingerprint of a finger pressed against a finger pressing surface. 前記動作伝達機構は、その一端部が前記指紋センサに取り付けられると共に他端部が前記筐体に取り付けられた可撓性部材によって構成されて成り、前記可撓性部材は、前記センサ保持部材の回転に伴って前記センサ保持部材によって屈曲される部位が変化することにより、前記指紋センサを前記指押し付け面にそって移動させることを特徴とする請求項2記載の指紋入力装置。The motion transmission mechanism is configured by a flexible member having one end attached to the fingerprint sensor and the other end attached to the housing, and the flexible member is formed of the sensor holding member. 3. The fingerprint input device according to claim 2 , wherein the fingerprint sensor is moved along the finger pressing surface by changing a portion bent by the sensor holding member with rotation. 前記センサ保持部材は、指を前記指押し付け面に押し付けることによって前記筐体の穴内に回転移動することを特徴とする請求項2又は3記載の指紋入力装置。4. The fingerprint input device according to claim 2 , wherein the sensor holding member rotates and moves into the hole of the housing by pressing a finger against the finger pressing surface. 前記指紋センサを前記穴外方向に付勢する付勢部材を備え、前記指で前記指押し付け面を押し付けた際に前記付勢部材の付勢力に抗して前記センサ保持部材が回転して前記穴内に没入し得るように構成されて成ることを特徴とする請求項4記載の指紋入力装置。An urging member for urging the fingerprint sensor in the direction of the hole; and the sensor holding member rotates against the urging force of the urging member when the finger pressing surface is pressed with the finger. The fingerprint input device according to claim 4 , wherein the fingerprint input device is configured to be able to be immersed in the hole. 前記センサ保持部材の指押し付け面は、前記筐体外面と面一に構成されていることを特徴とする請求項2乃至5のいずれか一に記載の指紋入力装置。The fingerprint input device according to claim 2 , wherein a finger pressing surface of the sensor holding member is configured to be flush with an outer surface of the housing. 外面に指押し付け面を有し、筐体に取り付けられた支持部材に回転可能に取り付けられたセンサ保持部材と、前記センサ保持部材の回転軸に対して並行に配設され、前記センサ保持部材の回転に応じて前記指押し付け面にそって移動しながら前記指押し付け面に押し付けられた指の指紋を読み取る指紋センサとを備えて成ることを特徴とする指紋センサを保持する機構。  A sensor holding member having a finger pressing surface on the outer surface and rotatably attached to a support member attached to the housing, and disposed in parallel with the rotation axis of the sensor holding member, A mechanism for holding a fingerprint sensor, comprising: a fingerprint sensor for reading a fingerprint of a finger pressed against the finger pressing surface while moving along the finger pressing surface according to rotation.
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JP2001263488A JP3636117B2 (en) 2001-08-31 2001-08-31 Fingerprint input device
CNB021419744A CN1201262C (en) 2001-08-31 2002-08-29 Fingerprint inputting apparatus
TW091119772A TW583594B (en) 2001-08-31 2002-08-30 Fingerprint image inputting device
KR10-2002-0051785A KR100517004B1 (en) 2001-08-31 2002-08-30 Fingerprint image inputting device

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