JPH0237413A - Coordinate input device - Google Patents
Coordinate input deviceInfo
- Publication number
- JPH0237413A JPH0237413A JP63185576A JP18557688A JPH0237413A JP H0237413 A JPH0237413 A JP H0237413A JP 63185576 A JP63185576 A JP 63185576A JP 18557688 A JP18557688 A JP 18557688A JP H0237413 A JPH0237413 A JP H0237413A
- Authority
- JP
- Japan
- Prior art keywords
- resistance film
- electrode
- sheet
- current
- coordinate
- 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
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- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
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- 239000004332 silver Substances 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は座標入力装置に関し、特に抵抗膜に流入分割さ
れた電流値により座標を検出する感圧型の座標入力装置
に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a coordinate input device, and more particularly to a pressure-sensitive coordinate input device that detects coordinates based on the value of a current flowing into and divided into a resistive film.
（従来の技術）
第４図は従来の座標入力装置を示す構成図である。同図
において、４１は定電流源、４２は定電流源４１に接続
された入力ペン、４３は−様な表面抵抗率を有する抵抗
膜シート、４４．４５はＸ座標値を検出するためのダイ
オード群、４６．４７はＸ座標値を検出するためのダイ
オード群、４８．４９はスイッチである。(Prior Art) FIG. 4 is a block diagram showing a conventional coordinate input device. In the figure, 41 is a constant current source, 42 is an input pen connected to the constant current source 41, 43 is a resistive film sheet having a −-like surface resistivity, and 44.45 is a diode for detecting the X coordinate value. 46.47 is a diode group for detecting the X coordinate value, and 48.49 is a switch.
次に、従来の座標入力装置における座標検出動作を説明
する。Next, a coordinate detection operation in a conventional coordinate input device will be explained.
先ず、定電流源４１に接続された入力ペン４２で抵抗膜
シート４３を座標指示すると、接触点Ｐから電流がダイ
オード群４４及びダイオード群４５に流入する。この時
はスイッチ４８は閉じられており、スイッチ４９は開放
されている。ダイオード群４４．４５に流れる電流をＩ
ｘ＋及び■８□とするとＸ座標値と電流（Ｉ Ｉ ｘ
＋は比例する関係にあることから電流値工。、を検出す
ることによりＸ座標値が検出できる。そして、スイッチ
４８開放され、スイッチ４９は閉じらる。Ｘ座標検出と
同様にダイオード群４６゜４７に流れる電流をＩｙ＋及
びＩｙｚとするとＸ座標値と電流値１１７１は比例する
関係にあることから電流値エラ、を検出すればＸ座標値
が検出できる。First, when the input pen 42 connected to the constant current source 41 specifies the coordinates of the resistive film sheet 43, current flows from the contact point P into the diode group 44 and the diode group 45. At this time, switch 48 is closed and switch 49 is open. The current flowing through the diode group 44.45 is I
x+ and ■8□, the X coordinate value and current (I I x
+ is the current value because there is a proportional relationship. , the X coordinate value can be detected. Then, switch 48 is opened and switch 49 is closed. Similarly to the X coordinate detection, if the currents flowing through the diode groups 46 and 47 are Iy+ and Iyz, the X coordinate value and the current value 1171 are in a proportional relationship, so the X coordinate value can be detected by detecting the current value error.
（発明が解決しようとする課題）
しかしながら、上記従来の装置では抵抗膜シートの４辺
に接続するダイオードが多数必要となるため各ダイオー
ドの特性のバラツキにより座標入力装置全体の絶対精度
が低下するとともに装置全体からみて製造コストが高く
なるという問題点があった。(Problem to be Solved by the Invention) However, in the conventional device described above, a large number of diodes are required to be connected to the four sides of the resistive film sheet, and the absolute accuracy of the entire coordinate input device decreases due to variations in the characteristics of each diode. There was a problem in that the manufacturing cost of the entire device was high.
本発明はこれらの問題点を解決するためのもので、装置
全体の絶対精度の向上及°び低コスト化を図ることがで
きる座標入力装置を提供することを目的とする。The present invention is intended to solve these problems, and it is an object of the present invention to provide a coordinate input device that can improve the absolute accuracy of the entire device and reduce the cost.
（課題を解決するための手段）
本発明は前記問題点を解決するために、−様な表面抵抗
率を有する抵抗膜シートを用い、この抵抗膜シートに流
入、分割された電流の電流値により座標を検出する感圧
型座標入力装置において、抵抗膜シートを、高抵抗膜と
、この高抵抗膜の周辺４辺に塗布された低抵抗膜と、高
抵抗膜及び低抵抗膜の４角に接続された電極とから構成
し、さらに抵抗膜シートの上部に設けられる感圧ゴムと
、この感圧ゴムの上部に設けられ、かつ定電流が供給さ
れる電極シートとを具備したことに特徴がある。(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention uses a resistive film sheet having a surface resistivity of In a pressure-sensitive coordinate input device that detects coordinates, a resistive film sheet is connected to a high-resistance film, a low-resistance film coated on the four sides around the high-resistance film, and the four corners of the high-resistance film and the low-resistance film. It is characterized by comprising a pressure-sensitive rubber provided on the top of the resistive film sheet, and an electrode sheet provided on the top of the pressure-sensitive rubber and to which a constant current is supplied. .
（作用）
以上のような構成を有する本発明によれば、電極シート
の上から押圧した時に電極シートと抵抗膜シートが感圧
ゴムを介して電気的に接触する。(Function) According to the present invention having the above configuration, when pressed from above the electrode sheet, the electrode sheet and the resistive film sheet come into electrical contact via the pressure sensitive rubber.
押圧点からの電流が各電極に流入、分割する。そして、
Ｘ座標値を求める場合は一つの電極を基準にしてその電
極からＸ方向に位置する電極と基準となる電極とに流入
した各電流値を加算する。さらにその加算結果に抵抗膜
シートの表面の所定のＸ方向の幅を定電流源の電流値で
割った商を乗算し、その乗算結果がＸ座標値となる。Ｘ
座標値を求める場合は基準となる電極からＸ方向に位置
する電極と基準となる電極とに流入した各電流値を加算
する。さらにその加算結果に抵抗膜シートの表面のＸ方
向の所定の幅を定電流源の電流値で割った商を乗算し、
その乗算結果がＸ座標値となる。Current from the pressing point flows into each electrode and is divided. and,
When determining the X coordinate value, with one electrode as a reference, each current value flowing into the electrode located in the X direction from that electrode and the reference electrode is added. Further, the addition result is multiplied by the quotient obtained by dividing the predetermined width of the surface of the resistive film sheet in the X direction by the current value of the constant current source, and the multiplication result becomes the X coordinate value. X
When determining the coordinate values, each current value flowing into the electrode located in the X direction from the reference electrode and the reference electrode are added. Furthermore, the addition result is multiplied by the quotient obtained by dividing the predetermined width of the surface of the resistive film sheet in the X direction by the current value of the constant current source,
The multiplication result becomes the X coordinate value.
したがって、本発明は前記問題点を解決することができ
、装置全体の絶対精度の向上及び低コスト化を図ること
ができる座標入力装置を提供できる。Therefore, the present invention can solve the above-mentioned problems, and can provide a coordinate input device that can improve the absolute accuracy and reduce the cost of the entire device.
（実施例） 以下、本発明の一実施例を図面に基づいて説明する。(Example) Hereinafter, one embodiment of the present invention will be described based on the drawings.
はじめに、本発明の座標検出の原理について説明する。First, the principle of coordinate detection according to the present invention will be explained.
第２図は本発明に係る原理を示す構成図である。同図に
おいて、２１は−様な表面抵抗率を有する高抵抗膜、２
２は高抵抗膜２１の周囲４辺に接続された高抵抗膜１１
に比べて十分率さい−様な表面抵抗率を有する低抵抗膜
、２３．２４．２５．２６は高抵抗膜２１及び低抵抗膜
２２の４角に電気的に接続する電極である。ここで、各
電極２３．２４．２５．２６は接地されている。FIG. 2 is a configuration diagram showing the principle according to the present invention. In the figure, 21 is a high-resistance film having a −-like surface resistivity;
2 is a high-resistance film 11 connected to the four sides around the high-resistance film 21;
The low resistance films 23, 24, 25 and 26 having a surface resistivity sufficiently smaller than that of 23, 24, 25 and 26 are electrodes electrically connected to the four corners of the high resistance film 21 and the low resistance film 22. Here, each electrode 23, 24, 25, 26 is grounded.
次に、第２図を用いて本発明に係る動作原理を説明する
。Next, the operating principle according to the present invention will be explained using FIG. 2.
先ず、図示していない定電流源に接続された入力ペンで
座標指示すると、接触点Ｐから電流が流入したときに低
抵抗膜２２の左辺側及び右辺側は等測的に電極としての
働きを行ない、低抵抗膜２２の下辺側及び上辺側は通常
の抵抗体と同様の働きを行なう。従って、電極２３．２
４の接続点Ａと接触点Ｐとの間の抵抗値をＲＩ％電極２
５．２６の接続点Ｂと接触点Ｐとの間の抵抗値をＲ２、
接触点Ｐと低抵抗膜の左辺側及び右辺側の内端までの距
離を２１゜β２とすると、抵抗値Ｒ，，Ｒ２と距離ｎ、
、 Ｉ２２の間には
Ｒ１： Ｒ２＝ １２ ＋ ：ρ２ ・・・（１
）が成り立つ。First, when coordinates are specified using an input pen connected to a constant current source (not shown), when current flows from the contact point P, the left and right sides of the low resistance film 22 function as electrodes isometrically. The lower and upper sides of the low resistance film 22 perform the same function as a normal resistor. Therefore, electrode 23.2
The resistance value between the connection point A and the contact point P of 4 is RI%electrode 2
5.26 The resistance value between the connection point B and the contact point P is R2,
If the distance between the contact point P and the inner edge of the left side and right side of the low resistance film is 21°β2, then the resistance value R,, R2 and the distance n,
, I22 has R1: R2= 12 + :ρ2...(1
) holds true.
また、この時に接続点Ａ、Ｂに流入する電流を各々工、
■２とすると、
Ｒ１： Ｒ２” Ｉｌ： Ｉ−・・・（２）となる。Also, at this time, the current flowing into connection points A and B is
■If 2, then R1: R2'' Il: I-...(2).
さらにＡ ｒ ＋ ４２ ｚ ＝ ｇ 、 ＩＩ＋ Ｉ
２＝ Ｉとし、かつ式（１）と式（２）とから次式が導
かれる。Furthermore, A r + 42 z = g, II + I
2=I, and the following equation is derived from equation (1) and equation (2).
ｆｉｌ＝ｆｌＸＬ／Ｉ ・・・（３）すなわち、
β及び工は定数であるため電流値Ｉ２を検出することに
より距離β１が算出できる。なお、Ｘ座標値の検出につ
いても上述のＸ座標値の検出と同様の原理で算出できる
。fil=flXL/I...(3) That is,
Since β and h are constants, the distance β1 can be calculated by detecting the current value I2. Note that the detection of the X-coordinate value can also be calculated using the same principle as the detection of the above-mentioned X-coordinate value.
第３図は本発明の一実施例の人力部を示す構成図である
。同図において第２図と同じ参照番号は同じ構成要素を
示す。異なる構成要素として、２７はガラエボ基板やポ
リエステルフィルム等からなる絶縁シート、２８はシリ
コンゴム中に小さな金属粒子やカーボン粒子を入れ込ん
だ異方導電性感圧ゴム、２９はポリエステルフィルムや
ぺ・ント等番こカーボンインクや銀ペースト等をスクリ
ーニングあるいはスパッタリング等により塗布した可撓
性の電極シートである。また、電流分割用の抵抗膜シー
トは絶縁シート２７上に高抵抗膜２１を塗布し、その周
辺４辺に低抵抗膜２２を塗布し、さらに高抵抗膜２１及
び低抵抗膜２２の４角には電極２３．２４．２５．２６
が接続されている。低抵抗膜２２上には異方導電性感圧
ゴム２８を設け、この異方導電性感圧ゴム２８上には電
極シート２９が設けらている。そこで、電極シート２９
上をペンあるいは人間の指等で押圧すると異方導電性感
圧ゴム２８の作用で押圧点において電極シート２９の導
体膜と絶縁膜シート２７上に塗布された高抵抗膜２１が
電気的に接触する。FIG. 3 is a configuration diagram showing a human power section according to an embodiment of the present invention. In this figure, the same reference numerals as in FIG. 2 indicate the same components. As for the different components, 27 is an insulating sheet made of a Gala Evo substrate, polyester film, etc., 28 is an anisotropically conductive pressure-sensitive rubber containing small metal particles or carbon particles in silicone rubber, and 29 is a polyester film, paint, etc. It is a flexible electrode sheet coated with carbon ink, silver paste, etc. by screening or sputtering. In addition, the resistive film sheet for current division is made by applying a high-resistance film 21 on an insulating sheet 27, applying a low-resistance film 22 on the four sides around it, and then coating the four corners of the high-resistance film 21 and the low-resistance film 22. is electrode 23.24.25.26
is connected. An anisotropically conductive pressure sensitive rubber 28 is provided on the low resistance film 22, and an electrode sheet 29 is provided on this anisotropically conductive pressure sensitive rubber 28. Therefore, the electrode sheet 29
When the top is pressed with a pen or a human finger, the conductive film of the electrode sheet 29 and the high resistance film 21 coated on the insulating film sheet 27 come into electrical contact at the pressed point due to the action of the anisotropically conductive pressure sensitive rubber 28. .
第１図は本発明の一施例の座標入力装置の構成を示す構
成図である。同図において第２図と同じ参照番号は同じ
構成要素を示す。異なる構成要素として、電極シート２
９には定電流源ｌＯが電気的に接続されている。また、
電極２４は接地され、電極２３、２５．２６には各々電
流−電圧変換器１１．１２．１３が接続されている。さ
らに、電流−電圧変換器１１．１２の出力の和を取る加
算器１４、電流−電圧変換器１１．１３の出力の和を取
る加算器１５が設けられている。加算器１４の加算結果
に適当な定数Ｃｘ倍する乗算器１６、加算器１５の加算
結果に適当な定数Ｃｙ倍する乗算器１７が設けられてい
る。FIG. 1 is a block diagram showing the structure of a coordinate input device according to an embodiment of the present invention. In this figure, the same reference numerals as in FIG. 2 indicate the same components. As a different component, the electrode sheet 2
9 is electrically connected to a constant current source lO. Also,
Electrode 24 is grounded, and current-voltage converters 11, 12, 13 are connected to electrodes 23, 25, 26, respectively. Furthermore, an adder 14 that takes the sum of the outputs of the current-voltage converters 11.12, and an adder 15 that takes the sum of the outputs of the current-voltage converters 11.13 are provided. A multiplier 16 multiplies the addition result of the adder 14 by an appropriate constant Cx, and a multiplier 17 multiplies the addition result of the adder 15 by an appropriate constant Cy.
ここで、座標入力部の電極シート２９上をボールペン等
の座標権示ペンや人間の指で押圧すると、押圧点より電
極シート２９から異方導電性感圧ゴム２８を通じて低抵
抗膜２２に電流が流入する。そして、低抵抗膜２２上に
流入した電流はその位置に応じて低抵抗膜２２の４角に
設けられた電極２３．２４゜２５、２６に分割、流入す
る。上述した座標検出の動作原理によりＸ座標は次のよ
うに得られる。先ず電極２６からの電流値工、と電極２
５からの電流値工、が電流−電圧変換器１１．１２によ
って各々電圧に変換され、その後加算器１４により各々
加算される。その加算結果は乗算器１６により適当な定
数Ｃｘ倍された結果がＸ座標値となる。同様にして、Ｘ
座標は電極２６からの電流値りと電極２３からの電流値
工、が電流−電圧変換器１１．１３によって各々電圧に
変換され、その後加算器１５により各々加算される。そ
の加算結果は乗算器１７により適当な定数Ｃｙ倍された
結果がＸ座標値となる。Here, when the electrode sheet 29 of the coordinate input section is pressed with a coordinate indicating pen such as a ballpoint pen or a human finger, a current flows from the electrode sheet 29 to the low resistance film 22 through the anisotropically conductive pressure sensitive rubber 28 from the pressed point. do. The current flowing onto the low resistance film 22 is divided and flows into the electrodes 23, 24, 25 and 26 provided at the four corners of the low resistance film 22 depending on the position thereof. Based on the operating principle of coordinate detection described above, the X coordinate is obtained as follows. First, the current value from electrode 26, and electrode 2
The current values from 5 are each converted into voltages by current-to-voltage converters 11, 12, and then each added by an adder 14. The addition result is multiplied by an appropriate constant Cx by the multiplier 16, and the result becomes the X coordinate value. Similarly, X
As for the coordinates, the current value from the electrode 26 and the current value from the electrode 23 are converted into voltages by current-voltage converters 11 and 13, and then added by an adder 15. The result of the addition is multiplied by an appropriate constant Cy by the multiplier 17, and the result becomes the X coordinate value.
尚、上記本実施例においては各電極に流入する電流を加
算器及び乗算器にて演算し座標値を算出しているが、各
電流値をＡ／Ｄ変換し、ＣＰＵとうにより同様の演算を
行なってもよいことは明らかである。また、電極シート
２９が異方導電性感圧ゴム２８をはさんで低抵抗膜２２
の上部に設けられているが、両者の位置関係は上下どち
らでも可能であり低抵抗膜２２が電極シート２９の上部
に設けらだ場合は低抵抗膜を可撓性のあるポリエステル
フィルム等上に塗布することにより十分実現可能である
。In this embodiment, the coordinate values are calculated by calculating the current flowing into each electrode using an adder and a multiplier, but each current value is A/D converted and similar calculations are performed by the CPU. It is clear that it can be done. Further, the electrode sheet 29 is sandwiched between the anisotropically conductive pressure sensitive rubber 28 and the low resistance film 22.
However, the positional relationship between the two can be either above or below, and if the low resistance film 22 is provided on the top of the electrode sheet 29, the low resistance film may be placed on a flexible polyester film, etc. This can be fully realized by coating.
（発明の効果）
以上説明したように、本発明によれば、従来のように抵
抗膜シートに多数のダイオードを接続する必要がないた
め部品点数が大幅に減り、また座標を算出するための演
算において加算と乗算のみであることから周辺回路ある
いはＣＰＵの負担が少な（なるので低コストで制度のよ
い座標入力装置を実現することが可能となる。(Effects of the Invention) As explained above, according to the present invention, there is no need to connect a large number of diodes to a resistive film sheet as in the conventional case, and the number of parts is significantly reduced. Since only addition and multiplication are performed in the step, the burden on peripheral circuits or the CPU is small (this makes it possible to realize a coordinate input device with good accuracy at low cost).
第１図は本発明の一実施例の座標入力装置の構成を示す
構成図、第２図は本発明に係る原理を示す構成図、第３
図は本実施例の入力部を示す構成図、第４図は従来の座
標入力装置を示す構成図である。
ｌＯ・・・定電流源、
１１、１２．１３・・・電流−電圧変換器、１４、１５
・・・加算器、
１６、１７・・・乗算器、
２１・・・高抵抗膜、２２・・・低抵抗膜、２３、２４
．２５．２６ ・・・電極、２７・・・絶縁シート、
２８・・・異方導電性感圧ゴム、
２９・・・電極シート。
第
２８： メ３（隼首・［１ち斥Ｊム
２９：変碕シート
躯叉さセｊ利にδ・プん入力節
第
図
ィローに芦？穂人り７唄Ｖセ］ｔ。
第
図FIG. 1 is a block diagram showing the configuration of a coordinate input device according to an embodiment of the present invention, FIG. 2 is a block diagram showing the principle of the present invention, and FIG.
This figure is a block diagram showing the input section of this embodiment, and FIG. 4 is a block diagram showing a conventional coordinate input device. lO... constant current source, 11, 12.13... current-voltage converter, 14, 15
... Adder, 16, 17... Multiplier, 21... High resistance film, 22... Low resistance film, 23, 24
．． 25.26... Electrode, 27... Insulating sheet, 28... Anisotropic conductive pressure sensitive rubber, 29... Electrode sheet. No. 28: Me 3 (Hayabusubi・[1chie Jmu 29: Henkei sheet body part, sejuri ni δ・pun input clause fig. figure
Claims (1)
膜シートに流入、分割された電流の電流値により座標を
検出する感圧型座標入力装置において、 前記抵抗膜シートを、高抵抗膜と、該高抵抗膜の周辺４
辺に塗布された低抵抗膜と、前記高抵抗膜及び前記低抵
抗膜の４角に接続された電極とから構成し、 さらに前記抵抗膜シートの上部に設けられる感圧ゴムと
、該感圧ゴムの上部に設けられ、かつ定電流が供給され
る電極シートとを具備し、 電極シートの上から押圧した時に前記電極シートと前記
抵抗膜シートが感圧ゴムを介して電気的に接触し、各前
記電極に流入、分割する電流の電流値をｘ座標、ｙ座標
に応じて加算及び乗算することによりｘ、ｙ座標値を求
めることを特徴とする座標入力装置。[Scope of Claims] A pressure-sensitive coordinate input device that uses a resistive film sheet having uniform surface resistivity and detects coordinates based on the current value of a current flowing into and divided into the resistive film sheet, comprising: , a high-resistance film and the surrounding area 4 of the high-resistance film
It consists of a low resistance film coated on the sides, and electrodes connected to the four corners of the high resistance film and the low resistance film, and further includes a pressure sensitive rubber provided on the top of the resistance film sheet, and the pressure sensitive an electrode sheet provided on top of the rubber and to which a constant current is supplied; when pressed from above the electrode sheet, the electrode sheet and the resistive film sheet come into electrical contact via the pressure-sensitive rubber; A coordinate input device characterized in that x and y coordinate values are obtained by adding and multiplying current values of currents flowing into and dividing each of the electrodes according to the x and y coordinates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63185576A JPH0237413A (en) | 1988-07-27 | 1988-07-27 | Coordinate input device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63185576A JPH0237413A (en) | 1988-07-27 | 1988-07-27 | Coordinate input device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0237413A true JPH0237413A (en) | 1990-02-07 |
Family
ID=16173228
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63185576A Pending JPH0237413A (en) | 1988-07-27 | 1988-07-27 | Coordinate input device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0237413A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006277663A (en) * | 2005-03-30 | 2006-10-12 | Fujitsu Component Ltd | Coordinate detection device and method |
| JP2007503037A (en) * | 2003-08-21 | 2007-02-15 | フィリップ、ハラルド | Anisotropic touch screen element |
-
1988
- 1988-07-27 JP JP63185576A patent/JPH0237413A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007503037A (en) * | 2003-08-21 | 2007-02-15 | フィリップ、ハラルド | Anisotropic touch screen element |
| JP2006277663A (en) * | 2005-03-30 | 2006-10-12 | Fujitsu Component Ltd | Coordinate detection device and method |
| JP4620512B2 (en) * | 2005-03-30 | 2011-01-26 | 富士通コンポーネント株式会社 | Coordinate detection apparatus and coordinate detection method |
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