JPS63204374A - Pressure type fingerprint input device - Google Patents
Pressure type fingerprint input deviceInfo
- Publication number
- JPS63204374A JPS63204374A JP62035489A JP3548987A JPS63204374A JP S63204374 A JPS63204374 A JP S63204374A JP 62035489 A JP62035489 A JP 62035489A JP 3548987 A JP3548987 A JP 3548987A JP S63204374 A JPS63204374 A JP S63204374A
- Authority
- JP
- Japan
- Prior art keywords
- scanning
- pressure
- fingerprint
- electrode
- sensitive sheet
- 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.)
- Granted
Links
- 239000011159 matrix material Substances 0.000 claims abstract description 23
- 238000003825 pressing Methods 0.000 claims abstract description 9
- 230000003287 optical effect Effects 0.000 abstract description 6
- 239000011521 glass Substances 0.000 abstract description 4
- 238000010030 laminating Methods 0.000 abstract description 3
- 239000004065 semiconductor Substances 0.000 abstract description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract description 2
- 229920013716 polyethylene resin Polymers 0.000 abstract description 2
- 239000011889 copper foil Substances 0.000 abstract 1
- 238000001514 detection method Methods 0.000 description 11
- 238000010586 diagram Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000000740 bleeding effect Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 101100524639 Toxoplasma gondii ROM3 gene Proteins 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000003698 laser cutting Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000000206 photolithography Methods 0.000 description 1
- 238000007781 pre-processing Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 238000007738 vacuum evaporation Methods 0.000 description 1
Landscapes
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
- Image Input (AREA)
Abstract
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は圧力式指紋入力装置に関する。[Detailed description of the invention] (Industrial application field) The present invention relates to a pressure type fingerprint input device.
（従来技術）
指紋は個人に特有のものであることから、犯罪捜索や外
国人の登録あるいは日常生活においては掛印と呼ばれて
印鑑代りに古くから個人を特定する有力な手段として利
用されてきた。また将来はドアのキーや印鑑証明などに
も用いられることが考えられている。(Prior art) Fingerprints are unique to individuals, so they have long been used as an effective means of identifying individuals in place of seals, called kakein, in crime investigations, foreign registration, and daily life. Ta. It is also thought that in the future it will be used for things such as door keys and seal certificates.
指紋は通常指の先に墨または朱肉あるいは最近では無色
の蛍光性液体をつけて紙に押捺することにより登録して
おき、また犯罪捜索においては薬品などを用いて犯人の
つけた指紋を可視化し、個人の指から検出した指紋と照
合させて指紋のパターンの特徴から同一人か否かの判定
をしている。Fingerprints are usually registered by applying ink or ink to the tip of the finger, or recently, colorless fluorescent liquid and stamping it on paper, and when investigating crimes, chemicals are used to visualize the fingerprints left by the criminal. The fingerprints are compared with the fingerprints detected on the individual's fingers to determine whether they are the same person based on the characteristics of the fingerprint pattern.
ところで従来の指紋検出法は指先をガラス板などに軽く
押し当ててその部分を光で照射しその反射光をＣＯＤな
どにより光電変換して電気信号を得、この電気信号を処
理して指紋を検出している（たとえば特開昭６１−１１
４９７９号）、このような光学式検出法による指紋検出
装置は据置式の指紋検出機としては問題ないが、指紋を
個人識別の手段として利用することが考えられる部屋の
ドアや車のドアのキー、印鑑証明、ＩＣカード。By the way, in the conventional fingerprint detection method, the fingertip is lightly pressed against a glass plate, etc., the area is irradiated with light, the reflected light is photoelectrically converted using COD, etc. to obtain an electrical signal, and this electrical signal is processed to detect the fingerprint. (For example, JP-A-61-11
No. 4979), such a fingerprint detection device using an optical detection method has no problem as a stationary fingerprint detector, but it can be used for room door or car door keys where fingerprints can be used as a means of personal identification. , seal certificate, IC card.
特殊機器の操作パネルなどについては小型で低消費電力
が不可欠の条件であるにもかかわらず、上述した光学式
の指紋検出装置は光源およびその電源やレンズなどを含
む光学系が必要となるため厚くなり大型化するので上記
した用途に不向きであるとともにＣＣＤなどの高価な素
子が必要になるためコスト高となり普及の妨げとなるお
それがある。Although small size and low power consumption are essential requirements for operation panels of special equipment, the above-mentioned optical fingerprint detection device requires an optical system that includes a light source, its power source, and a lens, so it is thick and thick. This increases the size of the device, making it unsuitable for the above-mentioned applications, and requires an expensive element such as a CCD, which increases costs and may hinder its widespread use.
また検出技術の上から見ても、指先を押し付けたときの
押圧力の加減や指先の汚れあるいは色などによって検出
結果の信頼性が低下するという問題もある。In addition, from a detection technology perspective, there is also the problem that the reliability of the detection results decreases depending on the amount of pressure applied when the fingertip is pressed, dirt on the fingertip, or color.
指紋検出の信頼性を高めるために検出前に指先に朱肉や
墨をつけて色により指紋パターンを強調させる方法も提
案されているが、このような前準備自体が煩わしいし、
用途によってはこのような準備ができない場合がある。In order to increase the reliability of fingerprint detection, methods have been proposed in which the fingertips are coated with vermilion or ink before detection to emphasize the fingerprint pattern with color, but such preparation is itself cumbersome.
Depending on the application, such preparation may not be possible.
（発明の目的および構成）
本発明は上記の点にかんがみてなされたもので、簡潔、
薄形且つ安価な構成でしかも少ない消費電力で指紋を入
力することを目的とし、この目的を達成するために、指
先を押し付けたときの指紋パターンによる圧力の強さに
応じて抵抗値が変化する感圧シートと、互いに交差して
マトリクスを形成するように絶縁して配置された複数本
の第１および第２の走査用電極を有するマトリクス電極
板とを積層して指紋入力板を構成し、第１および第２の
走査用電極を所定の順序で走査し、走査信号が印加され
た第１の走査用電極と第２の走査用電極との交点を中心
とする感圧シート部位の抵抗値を電気的に取り出すこと
により指紋パターンを圧力的に検出するように構成した
ものである。(Object and structure of the invention) The present invention has been made in view of the above points, and is simple,
The purpose is to input a fingerprint with a thin and inexpensive configuration and low power consumption.To achieve this purpose, the resistance value changes depending on the strength of pressure caused by the fingerprint pattern when the fingertip is pressed against it. A fingerprint input board is constructed by laminating a pressure-sensitive sheet and a matrix electrode plate having a plurality of first and second scanning electrodes arranged insulated so as to cross each other to form a matrix; The first and second scanning electrodes are scanned in a predetermined order, and the resistance value of the pressure sensitive sheet portion centered on the intersection of the first scanning electrode and the second scanning electrode to which the scanning signal is applied. The fingerprint pattern is pressure-detected by electrically extracting the fingerprint.
（実施例） 以下本発明を図面に基づいて説明する。(Example) The present invention will be explained below based on the drawings.
第１図は本発明による指紋入力装置の一実施例のブロッ
ク線図である。FIG. 1 is a block diagram of an embodiment of a fingerprint input device according to the present invention.
図において、ｌは指先を押しつける指紋入力板、２はＲ
ＯＭ３に格納された所定の処理プログラムに従って指令
し作動するプロセッサ、４は指紋入力板ｌにより読み取
られた指紋データを記憶するＲＡＭ、５はプロセッサ２
から出力する８ビツトのＸ方向アドレスな復号化するＸ
輌デコーダ、６はプロセッサ２から出力する８ビツトの
Ｙ方向アドレスな復号化するＹ輌デコーダ、７は指紋入
力板ｌから得られるアナログ指紋データを電圧値として
取り出すための抵抗、８は抵抗７の一端Ａから電圧値と
して取り出されるアナログ指紋データをデジタル信号に
変換するＡ／Ｄ変換器である。In the figure, l is the fingerprint input board that you press your fingertip on, and 2 is R.
A processor that commands and operates according to a predetermined processing program stored in the OM3, 4 a RAM that stores fingerprint data read by the fingerprint input board 1, and 5 a processor 2.
The 8-bit X-direction address output from
6 is a Y-vehicle decoder that decodes the 8-bit Y-direction address output from the processor 2; 7 is a resistor for extracting the analog fingerprint data obtained from the fingerprint input board l as a voltage value; 8 is the resistor 7; This is an A/D converter that converts analog fingerprint data taken out as a voltage value from one end A into a digital signal.
指紋入力板ｌは第２図に示すように、シート積層構造で
、上から順に、指の油や水分による悪影響を防ぐための
ポリエチレン系樹脂などの保護シートｌａと、一方の電
極を構成する銅箔などの導電シートｌｂと、加わる圧力
の大きさに応じて抵抗値が変化する厚さ０．２〜．０．
４ｍｍの感圧シー）１ｃと、Ｘ軸方向とＹ軸方向の格子
状に多数の半導体スイッチが形成されたマトリクス電極
板１ｄとをガラス板１ｅ−ｐに積層して成る。感圧シー
トｌｃとしては、たとえば横浜ゴム製（商品名）が利用
できる。As shown in Figure 2, the fingerprint input board l has a laminated sheet structure, and from the top, a protective sheet la made of polyethylene resin or the like to prevent the negative effects of finger oil and moisture, and a copper layer forming one electrode. A conductive sheet lb such as a foil and a thickness of 0.2 to 100 lb, whose resistance value changes depending on the amount of pressure applied. 0.
A 4 mm pressure sensitive sheet 1c and a matrix electrode plate 1d on which a large number of semiconductor switches are formed in a lattice shape in the X-axis direction and the Y-axis direction are laminated on a glass plate 1e-p. As the pressure sensitive sheet lc, for example, one manufactured by Yokohama Rubber (trade name) can be used.
マトリクス電極板１ｄはアクティブマトリクス液晶ディ
スプレイなどで高精細度を実現する技術として知られて
いる薄膜トランジスタアレイをフォトリソグラフィの手
法を用いてガラス板、セラミック板あるいは半導体基板
上に形成したもので、−辺にＸ方向走査用電極の端子を
、それに隣接するもう一辺にＹ方向走査用電極の端子を
有する。このマトリクス電極板１ｄの回路構成は第３図
のようになる。第３図において１１ｍ１＋１．１１．
・ａｍはｙ軸方向に並んだバスバーで構成されるＸ方向
走査用電極、又ＦＩ＊ ｌ ＦＢＩ ””はＸ軸方向に
並んだバスバーで構成されるＹ方向走査用電極であり、
交差する走査電極間はクロスオーバ部により絶縁されて
いる。Ｘ方向およびＹ方向走査用電極間にはＭＯＳＦＥ
Ｔなどのスイッチング素子が形成されている。たとえば
Ｘ方向走査用電極ｌヨ、とｙ方向走査用電極文７．どの
間にはスイッチング素子ＳＷ、が、またＸ方向走査用電
極ＪＬｘｌとｙ方向走査用電極ｘｙｔとの間にはスイッ
チング素子ＳＷ、が形成されている。The matrix electrode plate 1d is a thin film transistor array, which is known as a technology for achieving high definition in active matrix liquid crystal displays, etc., formed on a glass plate, ceramic plate, or semiconductor substrate using photolithography. A terminal for an electrode for scanning in the X direction is provided on one side, and a terminal for an electrode for scanning in a Y direction is provided on the other side adjacent thereto. The circuit configuration of this matrix electrode plate 1d is shown in FIG. In Figure 3, 11m1+1.11.
・am is an electrode for scanning in the X direction, which is made up of bus bars arranged in the y-axis direction, and FI* l FBI is an electrode for scanning in the Y-direction, which is made up of bus bars arranged in the direction of the X-axis,
The intersecting scanning electrodes are insulated by a crossover section. There is a MOSFE between the X direction and Y direction scanning electrodes.
A switching element such as T is formed. For example, an electrode for scanning in the X direction and an electrode for scanning in the y direction. A switching element SW is formed between the two electrodes, and a switching element SW is formed between the X-direction scanning electrode JLxl and the y-direction scanning electrode xyt.
次に指紋入力の手順と回路動作を第４図のフローチャー
トを用いて説明する。Next, the fingerprint input procedure and circuit operation will be explained using the flowchart of FIG.
ＲＯＭ３に格納されたプログラムに従ってプロセッサ２
から１６ビツトのアドレスが出力されるが、上位８ビツ
トはＸ方向走査のためのアドレスであり、下位８ビツト
はＹ方向走査のためのアドレスである。上位８ビツトの
アドレスはＸ軸デコーダ５により復号化されてＸ方向走
査信号となり、また下位８ビツトのアドレスはＹ軸デコ
ーダ６により復号化されてＹ方向走査信号となって感圧
シートｌのマトリクス電極板１ｄの端子にそれぞれ転送
される。Ｙ方向走査信号の周期はＸ方向走査信号の周期
の２５６倍であり、いずれの方向の走査信号も最初のア
ドレスでアドレスカウンタが１となる（Ｆ−１）。Processor 2 according to the program stored in ROM3
A 16-bit address is output from , the upper 8 bits being an address for scanning in the X direction, and the lower 8 bits being an address for scanning in the Y direction. The upper 8-bit address is decoded by the X-axis decoder 5 and becomes an X-direction scanning signal, and the lower-order 8-bit address is decoded by the Y-axis decoder 6 and becomes a Y-direction scanning signal, which is sent to the matrix of the pressure-sensitive sheet l. The signals are transferred to the terminals of the electrode plate 1d. The period of the Y-direction scanning signal is 256 times the period of the X-direction scanning signal, and the address counter becomes 1 at the first address of any direction scanning signal (F-1).
この状態で指先を指紋入力板ｌに軽く押しつけると、感
圧シートｌｃが指紋のパターンに応じて押圧され、押圧
点は抵抗値が減少する。When the fingertip is lightly pressed against the fingerprint input board l in this state, the pressure-sensitive sheet lc is pressed in accordance with the fingerprint pattern, and the resistance value at the pressed point decreases.
マトリクス電極板１ｄは上述したようにＸ軸デコーダ５
から出力するＸ方向走査信号とＹ軸デコーダ６から出力
するＹ方向走査信号とによって走査されている（Ｆ−２
）ので、マトリクス電極板１ｄの各点に形成されたスイ
ッチング素子ｓｗ、、ｓｗ２．−軸が順次ＯＮされてい
く、マトリクス電極板１ｄの走査電極と導電シートｉｂ
との間には電位がかかっているので、そのＯＮされたス
イッチング素子に接続された部位における感圧シートｌ
ｃの抵抗値に応じた電流が抵抗７に流れ、抵抗７の端子
Ａに電圧として生ずる。感圧シート１ｃの各部位の抵抗
値は押圧力によって変化するので、指紋パターンによっ
て強く押圧された部位の抵抗値は小さく１強く押されな
い部位の抵抗値は大きい、従って点Ａにおける電圧値（
アナログ指紋データ）がその部位に加えられた力の大き
さを表わす、このアナログ指紋データはＡ／Ｄ変換器８
によりデジタル信号に変換され（Ｆ−３）、Ａ／Ｄ変換
が終了したことを確認した後（Ｆ−４）取り込み（Ｆ−
５）、いま取り込んだ指紋データがＸ方向の１走査ライ
ン上の最終部位でないことを確認した上で（Ｆ−６）そ
の取り込んだ指紋データをプロセッサ２を介してＲＡＭ
４に転送し記憶する（Ｆ−７）、その後プロセッサ２内
のアドレスカウンタを１だけインクリメントして（Ｆ−
８）ステップ（Ｆ−２）にもどり、同一走査電極上の隣
りの部位についての指紋データを取り込む処理に入る。The matrix electrode plate 1d is connected to the X-axis decoder 5 as described above.
(F-2
), the switching elements sw, , sw2 . . . formed at each point of the matrix electrode plate 1d. - The scanning electrode of the matrix electrode plate 1d and the conductive sheet ib whose axes are sequentially turned on.
Since a potential is applied between the pressure sensitive sheet l at the part connected to the ON switching element
A current corresponding to the resistance value of c flows through the resistor 7, and a voltage is generated at the terminal A of the resistor 7. The resistance value of each part of the pressure-sensitive sheet 1c changes depending on the pressing force, so the resistance value of the part strongly pressed by the fingerprint pattern is small 1 The resistance value of the part not strongly pressed is large, therefore the voltage value at point A (
The analog fingerprint data (analog fingerprint data) represents the magnitude of the force applied to that part.
is converted into a digital signal (F-3), and after confirming that A/D conversion has been completed (F-4), it is captured (F-4).
5) After confirming that the fingerprint data that has just been captured is not the final part on one scanning line in the X direction (F-6), the captured fingerprint data is transferred to the RAM via the processor 2.
4 and stores it (F-7), then increments the address counter in processor 2 by 1 (F-7).
8) Return to step (F-2) and begin the process of capturing fingerprint data for adjacent parts on the same scanning electrode.
その後は上述したステップ（Ｆ−２）から（Ｆ−６）ま
での走査を繰り返す、こうしてＸ方向に走査して指紋デ
ータを順次最後のラインまで取り込む、こうして指紋入
力板ｌ上に押し付けられた指先の全指紋データがＲＡＭ
４に入力される。After that, the scanning from steps (F-2) to (F-6) described above is repeated, and the fingerprint data is sequentially captured up to the last line by scanning in the X direction.In this way, the fingertip pressed on the fingerprint input board l All fingerprint data is stored in RAM.
4 is input.
第５図はＸ方向に走査することにより得られた感圧シー
トＩＣの各部位の抵抗値を表わしている０図に示された
抵抗曲線の谷の部分Ｂが指紋パターンの山の部分に相当
し、抵抗曲線の山の部分Ｃが指紋パターンの谷の部分に
相当する。Figure 5 shows the resistance value of each part of the pressure-sensitive sheet IC obtained by scanning in the X direction.The valley part B of the resistance curve shown in Figure 0 corresponds to the mountain part of the fingerprint pattern. However, the peak portion C of the resistance curve corresponds to the valley portion of the fingerprint pattern.
ところで本発明゛で用いる指紋入力板の感圧シー）−１
ｃには押圧力により抵抗値が変換する導電ゴムが用いら
れるが、導電ゴムには第６図に示すように加圧点Ｐを中
心に押圧の影響を受ける部分（斜線で示す）が広がりそ
の広がり方は下方はど大きくなる「にじみ現象」と呼ば
れる現象がある。By the way, the pressure sensitive sheet of the fingerprint input board used in the present invention)-1
Conductive rubber whose resistance value changes depending on the pressing force is used for c, but as shown in Figure 6, the area affected by the pressing force (indicated by diagonal lines) spreads out around the pressing point P. There is a phenomenon called ``bleeding'' in which the spread becomes larger downward.
検出対象が指紋パターンのように微細な凹凸となると、
このにじみ現象をできるだけ少なくするのが感圧上好ま
しい、第７図はこのような点を考慮した指紋入力板の要
部を示した平面図であり。When the detection target has minute irregularities like a fingerprint pattern,
It is preferable in terms of pressure sensitivity to minimize this bleeding phenomenon. FIG. 7 is a plan view showing the main parts of a fingerprint input board that takes this point into consideration.
ｉヨ＠ｅ ｌ Ｍｌｌｍ ””はＸ方向を走査用電極、
見、１Ｊｌ 、、、 ａｓｓはＹ方向走査用電極である
。直交する両走査用電極の交差部位にはできるだけ薄い
導電ゴム製の感圧シートｌｃを小片にして挟持して配置
してあり、押圧力が（紙面に垂直方向に）加えられると
各交差部位の感圧シート片の抵抗値が変化するので、走
査用電極を介して電流値に変換として取り出すことがで
きる。この実施例では前述した感圧シートと異なりスイ
ッチング素子は設けてない。iyo@e l Mllm "" is the electrode for scanning in the X direction,
1Jl, . . . ass is a Y-direction scanning electrode. A pressure-sensitive sheet LC made of conductive rubber, which is as thin as possible, is sandwiched and placed in small pieces at the intersection of the two orthogonal scanning electrodes, and when a pressing force is applied (in the direction perpendicular to the plane of the paper), each intersection Since the resistance value of the pressure-sensitive sheet piece changes, it can be converted into a current value and taken out via the scanning electrode. In this embodiment, unlike the pressure sensitive sheet described above, no switching element is provided.
このような構造の指紋入力板にすれば、Ｘ方向およびＹ
方向走査用電極の各交差部位ごとの感圧の影響を孤立化
させて他の交差部位に及ばないようにできるので前述し
たにじみ現象の影響を少なくすることができる。If the fingerprint input board has such a structure, it will be possible to
Since the influence of pressure sensitivity at each crossing point of the directional scanning electrodes can be isolated and prevented from affecting other crossing points, the influence of the above-mentioned bleeding phenomenon can be reduced.
また、導電ゴムを小片とする代りに、第８図に示すよう
に片面に基盤目状に溝１０を形成してもよい、この加工
にはレーザカットなどが用いられる。Furthermore, instead of forming small pieces of conductive rubber, grooves 10 may be formed on one side in the shape of a base pattern, as shown in FIG. 8. Laser cutting or the like may be used for this processing.
第９図および第１Ｏ図は本発明の指紋入力板のさらに他
の実施例を示しており、第９図はその分解斜視図、第１
θ図は組立て状態の断面図である。9 and 1O show still other embodiments of the fingerprint input board of the present invention, FIG. 9 is an exploded perspective view thereof, and FIG.
The θ diagram is a sectional view of the assembled state.
この実施例における指紋入力板は、マトリクス電極シー
ト２０と絶縁シート２１と感圧シート２２とを順次積層
して成り、マトリクス電極シート２０はアルミナまたは
半導体のような材料から成る基板２０ａの上面に複数の
Ｘ方向走査電極ｌ ｘｒ、 ｊＬ ｗ＊、 ””を平
行に真空蒸着法やスパッタリング法で形成し、下面には
それとは直交する方向に複数のＹ方向走査電極１ ｙｉ
、 ｊＬ ｙｌ、 ”・を平行に同様な方法で形成し
てマトリクス電極とし、各ｙ方向走査電極ｆＬ ｙｌ、
ｊｌ ｙｔ＋ ＊＋＋１１はスルーホールにより基
板の上面に一部が露出して導電部Ｐｙ＋。The fingerprint input board in this embodiment is made up of a matrix electrode sheet 20, an insulating sheet 21, and a pressure-sensitive sheet 22, which are laminated in sequence. X-direction scanning electrodes lxr, jLw*, "" are formed in parallel by vacuum evaporation or sputtering, and a plurality of Y-direction scanning electrodes 1yi are formed on the bottom surface in a direction perpendicular to the X-direction scanning electrodes 1yi.
, jL yl, ”・ are formed in parallel in a similar manner to form a matrix electrode, and each y-direction scanning electrode fL yl,
jl yt+ *++ 11 is a conductive part Py+, which is partially exposed on the upper surface of the substrate through a through hole.
Ｐｙ＊、 ””を形成するようにしである。Py*, ``'' is formed.
絶縁シート２１はマトリクス電極シート２０に形成され
たマトリクス電極の交点を中心とする部位に開口２１ａ
が位置するように多数の開口２１ａが形成されている。The insulating sheet 21 has openings 21a at locations centered on the intersections of the matrix electrodes formed on the matrix electrode sheet 20.
A large number of openings 21a are formed such that the openings 21a are located at the openings 21a.
感圧シート２２は第２図に示した指紋入力板ｌの感圧シ
ートｌｃと同じもので、加わる圧力の大きさに応じて抵
抗値が変化する。The pressure-sensitive sheet 22 is the same as the pressure-sensitive sheet lc of the fingerprint input board 1 shown in FIG. 2, and its resistance value changes depending on the magnitude of the applied pressure.
第１Ｏ図に示すように、指紋入力板上に指３０を乗せて
軽く押し付けると、感圧シート２２が絶縁シート２１の
開口２１ａの枠を支点としてたわみマトリクス電極シー
ト２０上の上面においてＸ方向走査電極ｉＩＩ （たと
えばｉ、ｔ）とＹ方向走査電極見、（たとえばＵ、ｔ）
の導電部ｐｙ（たとえばｐ□）とに接触し、この間の横
方向抵抗値が押圧力に応じて変化する。これにより指紋
パターンに応じた抵抗値変化を電流値の変化として検出
することができる。As shown in FIG. 1O, when a finger 30 is placed on the fingerprint input board and pressed lightly, the pressure sensitive sheet 22 deflects around the frame of the opening 21a of the insulating sheet 21 and scans in the X direction on the upper surface of the matrix electrode sheet 20. Electrode III (e.g. i, t) and Y direction scanning electrode (e.g. U, t)
The conductive portion py (for example, p□) is in contact with the conductive portion py (for example, p□), and the lateral resistance value therebetween changes depending on the pressing force. Thereby, a change in resistance value according to a fingerprint pattern can be detected as a change in current value.
本実施例によれば、第２図に示した指紋入力板のような
スイッチング素子が不要となるので、構成が簡単になり
、コストの安い微小ピッチの指紋入力手段が得られる。According to this embodiment, since a switching element such as the fingerprint input board shown in FIG. 2 is not required, the configuration is simplified and an inexpensive micro-pitch fingerprint input means can be obtained.
以上で指紋入力の手順を終るが、このようにして人の指
紋をあらたに登録したり、すでに登録しである人の指紋
を再登録したり、あるいはすてに登録しである指紋と新
たに入力した指紋とを比較して同一人か否かの判定をし
たりするのに用いることができる。指紋データを用いて
同一人か否かの判定をするには、一旦記憶しである指紋
データを２値化するなどの前処理が必要になり、指紋の
特徴に着目して指紋パターンの類否な判定する。This concludes the fingerprint input procedure, but in this way you can register a new fingerprint, re-register an already registered fingerprint, or register a new fingerprint with an already registered fingerprint. It can be used to compare input fingerprints and determine whether they are the same person. In order to determine whether the fingerprint data is the same person or not, it is necessary to perform preprocessing such as binarizing the stored fingerprint data. Make a judgment.
また、上記実施例ではマトリクスシートのＸ方向、Ｙ方
向走査用電極の数を８ビツトで決まる２５６本としたが
、指紋の利用の仕方に応じて任意に変えることができる
。Further, in the above embodiment, the number of electrodes for scanning the matrix sheet in the X and Y directions was set to 256 determined by 8 bits, but it can be changed arbitrarily depending on how the fingerprint is used.
（発明の効果）
以上説明したように、本発明においては、指先の押圧力
の強さに応じて抵抗値が変化する感圧シートと、互いに
交差してマトリクスを形成するように絶縁して配置され
た複数本の第１および第２の走査用電極を有するマトリ
クス電極板とて指絞入力板を構成し、第１およびｆ５２
の走査用電極を所定の順序で走査し、走査信号が印加さ
れた第１の走査用電極とｆｉＳ２の走査用電極との交点
を中心とする感圧シート部位の抵抗値を電気的に取り出
すことにより指紋パターンを圧力的に検出するように構
成したので、従来のような光学式の指紋検出装置に比べ
て消費電力が少なく且つ構成が簡潔、薄形てコンパクト
になり且つＣＣＤや光学系を用いないので安価にでき、
指紋押捺時と全く同じ条件て指紋が検出ができる。また
検出結果が指先の色などに左右されず信頼性が高い。(Effects of the Invention) As explained above, in the present invention, pressure-sensitive sheets whose resistance value changes depending on the strength of the pressing force of the fingertips are insulated and arranged so as to intersect with each other to form a matrix. A matrix electrode plate having a plurality of first and second scanning electrodes constitutes a finger squeeze input board, and the first and f52
scanning the scanning electrodes in a predetermined order, and electrically extracting the resistance value of the pressure sensitive sheet portion centered at the intersection of the first scanning electrode to which the scanning signal is applied and the scanning electrode of fiS2. Since it is configured to detect fingerprint patterns using pressure, it consumes less power than conventional optical fingerprint detection devices, has a simpler configuration, is thinner and more compact, and does not use a CCD or optical system. It can be done cheaply because there is no
Fingerprints can be detected under exactly the same conditions as when fingerprints are imprinted. Furthermore, the detection results are highly reliable as they are not affected by the color of the fingertip.
本発明による指紋入力装置はそのコンパクト性および安
価な点から室内や車のドアのキー、印鑑証明、ＩＣカー
ドなど個人の特定を条件とする分野のものに広く応用て
きる。Due to its compactness and low cost, the fingerprint input device according to the present invention can be widely applied to fields where personal identification is required, such as indoor and car door keys, seal certificates, and IC cards.
第１図は本発明による圧力式指紋入力装置の一実施例の
ブロック線図、第２図は本発明による圧力式指紋入力装
置で用いる指紋入力板の分解斜視図、第３図は指紋入力
板のマトリクス電極板の概略構成図、第４図は本発明に
３ける指紋入力手順を説明するフローチャート、第５図
は指紋入力による感圧シートｌライン分の抵抗値を示す
曲線。
第６図は感圧シートとして用いる導電ゴムのにじみ現象
を説明する図、第７図は指紋入力板の他の実施例の要部
平面図、第８図は指紋入力板に用いる感圧シートの他の
例の斜視図、第９図は指紋入力板のさらに他の実施例の
分解斜視図、第１Ｏ図は第９図に示した指紋入力板の組
立て状態の部分断面図である。
ｌ・・・指紋入力板、ｌｃ−感圧シート、ｌｄ−・・マ
トリクス電極板、２・・・プロセッサ、３−ＲＯＭ、４
−ＲＡ Ｍ、Ｓ−Ｘ軸デコーダ、６−Ｙ輌デコーダ、８
−Ａ／Ｄ変換器
特許出願人 株式会社エニックス
代理人 弁理士 鈴 木 弘 男
第３図
第５図
ＴＦＬλ １
６４に第４図
第６図
第７図
第９図
第１０図FIG. 1 is a block diagram of an embodiment of the pressure-type fingerprint input device according to the present invention, FIG. 2 is an exploded perspective view of a fingerprint input board used in the pressure-type fingerprint input device according to the present invention, and FIG. 3 is a fingerprint input board. FIG. 4 is a flowchart explaining the fingerprint input procedure according to the third aspect of the present invention, and FIG. 5 is a curve showing the resistance value for one line of the pressure-sensitive sheet due to fingerprint input. Fig. 6 is a diagram explaining the bleeding phenomenon of the conductive rubber used as a pressure-sensitive sheet, Fig. 7 is a plan view of the main part of another embodiment of the fingerprint input board, and Fig. 8 is a diagram of the pressure-sensitive sheet used in the fingerprint input board. FIG. 9 is an exploded perspective view of still another embodiment of the fingerprint input board, and FIG. 1O is a partial sectional view of the fingerprint input board shown in FIG. 9 in an assembled state. l... Fingerprint input board, lc-pressure sensitive sheet, ld-... matrix electrode plate, 2... processor, 3-ROM, 4
-RAM, S-X axis decoder, 6-Y vehicle decoder, 8
- A/D converter patent applicant Enix Co., Ltd. agent Patent attorney Hiroshi Suzuki Figure 3 Figure 5 TFLλ 1
64, Figure 4, Figure 6, Figure 7, Figure 9, Figure 10.
Claims (4)
力の強さに応じて抵抗値が変化する感圧シートと互いに
交差してマトリクスを形成するように絶縁して配置され
た複数本の第１および第２の走査用電極を有するマトリ
クス電極板とを積層して成る指紋入力板と、前記第１の
走査用電極に所定の順序で走査信号を印加する第１の走
査回路と、前記第２の走査用電極に所定の順序で走査信
号を印加する第２の走査回路と、前記第１および第２の
走査回路により走査信号が印加された前記第１の走査用
電極と第２の走査用電極との交点を中心とする前記感圧
シートの部位の抵抗値を電気的に取り出す出力手段とを
有することを特徴とする圧力式指紋入力装置。(1) A pressure-sensitive sheet whose resistance value changes depending on the strength of the pressing force due to the fingerprint pattern when pressed with a fingertip, and a plurality of first sheets arranged insulated so as to cross each other and form a matrix. and a matrix electrode plate having a second scanning electrode; a first scanning circuit that applies a scanning signal to the first scanning electrode in a predetermined order; a second scanning circuit that applies scanning signals in a predetermined order to the scanning electrodes of the first scanning electrode and the second scanning electrode to which scanning signals are applied by the first and second scanning circuits; A pressure-type fingerprint input device comprising output means for electrically extracting the resistance value of a portion of the pressure-sensitive sheet centered on the intersection with the electrode.
第２の走査用電極との間に信号印加中オンするスイッチ
ング素子が接続され、該スイッチング素子と直列に前記
感圧シートと前記出力手段とが接続された特許請求の範
囲第１項に記載の圧力式指紋入力装置。(2) A switching element that is turned on during signal application is connected between the first scanning electrode and the second scanning electrode to which a scanning signal is simultaneously applied, and the pressure-sensitive sheet and the A pressure-type fingerprint input device according to claim 1, which is connected to an output means.
走査用電極の交点を中心とする部位において感圧シート
の小片を介して絶縁されている特許請求の範囲第１項に
記載の圧力式指紋入力装置。(3) Claim 1, wherein the first scanning electrode and the second scanning electrode are insulated through a small piece of a pressure-sensitive sheet at a region centered on the intersection of both scanning electrodes. Pressure-type fingerprint input device described in .
走査用電極の交点を中心とする部位を囲むようにスリッ
トの入った感圧シートを介して絶縁されている特許請求
の範囲第１項に記載の圧力式指紋入力装置。(4) A patent claim in which the first scanning electrode and the second scanning electrode are insulated via a pressure-sensitive sheet having a slit so as to surround a region centered on the intersection of both scanning electrodes. The pressure-type fingerprint input device according to item 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3548987A JPH0760455B2 (en) | 1987-02-20 | 1987-02-20 | Pressure fingerprint input device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3548987A JPH0760455B2 (en) | 1987-02-20 | 1987-02-20 | Pressure fingerprint input device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63204374A true JPS63204374A (en) | 1988-08-24 |
| JPH0760455B2 JPH0760455B2 (en) | 1995-06-28 |
Family
ID=12443160
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3548987A Expired - Fee Related JPH0760455B2 (en) | 1987-02-20 | 1987-02-20 | Pressure fingerprint input device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0760455B2 (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999034080A1 (en) * | 1997-12-26 | 1999-07-08 | Enix Corporation | Lock and switch using pressure-type fingerprint sensor |
| EA001521B1 (en) * | 1997-12-26 | 2001-04-23 | Эникс Корпорейшн | Lock and switch using pressure-type fingerprint sensor |
| US6234031B1 (en) | 1997-11-27 | 2001-05-22 | Nec Corporaion | Fingerprint detection apparatus |
| KR20010046215A (en) * | 1999-11-11 | 2001-06-05 | 김상균 | Thermal Semiconductor Fingerprint Sensor, Fingerprint Sensing Device Using Thermal Fingerprint Sensor, Manufacturing Method thereof, and Fingerprint Recognizing Method thereof |
| KR100393019B1 (en) * | 2000-11-14 | 2003-07-28 | 주식회사 싸인시스템 | Fingerprint Recognizer with a Function of Pressure Pattern Detection |
| US6980672B2 (en) | 1997-12-26 | 2005-12-27 | Enix Corporation | Lock and switch using pressure-type fingerprint sensor |
| JP2006190243A (en) * | 2005-01-07 | 2006-07-20 | Au Optronics Corp | Touch panel mounted with fingerprint recognizing function and its manufacturing method |
| JP2009031045A (en) * | 2007-07-25 | 2009-02-12 | Seiko Epson Corp | Pressure sensor |
| JP2016532985A (en) * | 2013-09-27 | 2016-10-20 | センセル インコーポレイテッドＳｅｎｓｅｌ，Ｉｎｃ． | Resistive touch sensor system and method |
| JP2017071470A (en) * | 2015-10-06 | 2017-04-13 | 大日本印刷株式会社 | Shelf management system |
| US10338722B2 (en) | 2013-09-27 | 2019-07-02 | Sensel, Inc. | Tactile touch sensor system and method |
| US11221706B2 (en) | 2013-09-27 | 2022-01-11 | Sensel, Inc. | Tactile touch sensor system and method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5827277A (en) * | 1981-07-30 | 1983-02-17 | シ−メンス・アクチエンゲゼルシヤフト | Finger print sensor |
-
1987
- 1987-02-20 JP JP3548987A patent/JPH0760455B2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5827277A (en) * | 1981-07-30 | 1983-02-17 | シ−メンス・アクチエンゲゼルシヤフト | Finger print sensor |
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6234031B1 (en) | 1997-11-27 | 2001-05-22 | Nec Corporaion | Fingerprint detection apparatus |
| WO1999034080A1 (en) * | 1997-12-26 | 1999-07-08 | Enix Corporation | Lock and switch using pressure-type fingerprint sensor |
| EA001521B1 (en) * | 1997-12-26 | 2001-04-23 | Эникс Корпорейшн | Lock and switch using pressure-type fingerprint sensor |
| US6980672B2 (en) | 1997-12-26 | 2005-12-27 | Enix Corporation | Lock and switch using pressure-type fingerprint sensor |
| KR20010046215A (en) * | 1999-11-11 | 2001-06-05 | 김상균 | Thermal Semiconductor Fingerprint Sensor, Fingerprint Sensing Device Using Thermal Fingerprint Sensor, Manufacturing Method thereof, and Fingerprint Recognizing Method thereof |
| KR100393019B1 (en) * | 2000-11-14 | 2003-07-28 | 주식회사 싸인시스템 | Fingerprint Recognizer with a Function of Pressure Pattern Detection |
| US7671847B2 (en) | 2005-01-07 | 2010-03-02 | Au Optronics Corp. | Touch panel and method for manufacturing the same |
| JP2006190243A (en) * | 2005-01-07 | 2006-07-20 | Au Optronics Corp | Touch panel mounted with fingerprint recognizing function and its manufacturing method |
| JP2009031045A (en) * | 2007-07-25 | 2009-02-12 | Seiko Epson Corp | Pressure sensor |
| JP2016532985A (en) * | 2013-09-27 | 2016-10-20 | センセル インコーポレイテッドＳｅｎｓｅｌ，Ｉｎｃ． | Resistive touch sensor system and method |
| US10338722B2 (en) | 2013-09-27 | 2019-07-02 | Sensel, Inc. | Tactile touch sensor system and method |
| US10534478B2 (en) | 2013-09-27 | 2020-01-14 | Sensel, Inc. | Touch sensor detector system and method |
| US10705643B2 (en) | 2013-09-27 | 2020-07-07 | Sensel, Inc. | Tactile touch sensor system and method |
| US11068118B2 (en) | 2013-09-27 | 2021-07-20 | Sensel, Inc. | Touch sensor detector system and method |
| US11221706B2 (en) | 2013-09-27 | 2022-01-11 | Sensel, Inc. | Tactile touch sensor system and method |
| US11520454B2 (en) | 2013-09-27 | 2022-12-06 | Sensel, Inc. | Touch sensor detector system and method |
| US11650687B2 (en) | 2013-09-27 | 2023-05-16 | Sensel, Inc. | Tactile touch sensor system and method |
| US11809672B2 (en) | 2013-09-27 | 2023-11-07 | Sensel, Inc. | Touch sensor detector system and method |
| JP2017071470A (en) * | 2015-10-06 | 2017-04-13 | 大日本印刷株式会社 | Shelf management system |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0760455B2 (en) | 1995-06-28 |
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