JPH09160710A - Coordinate input device - Google Patents

Coordinate input device

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Publication number
JPH09160710A
JPH09160710A JP32200795A JP32200795A JPH09160710A JP H09160710 A JPH09160710 A JP H09160710A JP 32200795 A JP32200795 A JP 32200795A JP 32200795 A JP32200795 A JP 32200795A JP H09160710 A JPH09160710 A JP H09160710A
Authority
JP
Japan
Prior art keywords
voltage
film
coordinate
resistance film
coordinate input
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
Application number
JP32200795A
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Japanese (ja)
Other versions
JP3799639B2 (en
Inventor
Shigemi Kurashima
茂美 倉島
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nagano Fujitsu Component Ltd
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Nagano Fujitsu Component Ltd
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Priority to JP32200795A priority Critical patent/JP3799639B2/en
Publication of JPH09160710A publication Critical patent/JPH09160710A/en
Application granted granted Critical
Publication of JP3799639B2 publication Critical patent/JP3799639B2/en
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Expired - Lifetime legal-status Critical Current

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Abstract

PROBLEM TO BE SOLVED: To securely detect input coordinates by patterning a resistance film in a grating shape consisting of vertical and horizontal lines so that the vertical lines are as wide as the horizontal lines and the vertical and horizontal lines increase in pitch toward the center part. SOLUTION: The resistance film 35 is formed on a glass substrate 34 and has its resistance value set larger than those of circumferential electrodes 22-25. The resistance film 35 is patterned in the grating shape consisting of the vertical lines extending along Y axis and the horizontal lines extending along X axis so that the line width WV of the vertical lines and the line width WH of the horizontal lines are equal or nearly equal to each other and the pitch PV of the vertical lines and the pitch PH of the horizontal lines increase toward the center part. Consequently, voltage drops across electrodes 22-25 for potential distribution generation are made small and the linearity of equipotential lines formed nearby the said electrodes 22-25 is increased, so that a potential distribution having good linearity can be generated on the resistance film 35.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【発明の属する技術分野】本発明は、コンピュータの入
力装置などとして使用される座標入力装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coordinate input device used as an input device of a computer.

【０００２】[0002]

【従来の技術】従来、この種の座標入力装置として、図
２３にその要部を概略的に示すようなものが提案されて
いる（特開昭４７−３６９２３号公報参照）。2. Description of the Related Art Conventionally, as a coordinate input device of this type, a device whose main part is schematically shown in FIG. 23 has been proposed (see Japanese Patent Laid-Open No. 47-36923).

【０００３】図２３中、１は座標の入力が行われる座標
入力パネルであり、２は基板上に形成された座標面をな
す抵抗膜、３〜６は抵抗値を抵抗膜２よりも小とする周
囲電極、７〜１０は駆動電圧が印加される駆動電圧印加
端子である。In FIG. 23, 1 is a coordinate input panel for inputting coordinates, 2 is a resistance film forming a coordinate plane formed on a substrate, and 3 to 6 are resistance values smaller than the resistance film 2. The peripheral electrodes 7 to 10 are drive voltage application terminals to which drive voltage is applied.

【０００４】また、１１は駆動電圧印加端子７〜１０に
駆動電圧を印加する駆動回路、１２は先端部１２Ａを抵
抗膜２に押下して接触させることにより座標入力を行う
座標入力ペン、１３は座標入力ペン１２の先端部１２Ａ
が接触した抵抗膜２上の座標を検出する入力座標検出回
路である。Reference numeral 11 is a drive circuit for applying a drive voltage to the drive voltage applying terminals 7 to 10. Reference numeral 12 is a coordinate input pen for inputting coordinates by pressing the tip portion 12A against the resistance film 2 to bring it into contact with the resistance film 2. The tip 12A of the coordinate input pen 12
Is an input coordinate detection circuit that detects the coordinates on the resistance film 2 that are in contact with.

【０００５】この座標入力装置は、駆動電圧印加端子
７、８に電源電圧ＶＣＣを印加し、駆動電圧印加端子
９、１０に接地電圧０Ｖを印加した場合における座標入
力ペン１２の先端部１２Ａが接触している位置の抵抗膜
２上の電圧と、駆動電圧印加端子８、１０に電源電圧Ｖ
ＣＣを印加し、駆動電圧印加端子７、９に接地電圧０Ｖ
を印加した場合における座標入力ペン１２の先端部１２
Ａが接触している位置の抵抗膜２上の電圧とを検出する
ことによって、入力座標の検出を行うとするものであ
る。In this coordinate input device, the tip 12A of the coordinate input pen 12 comes into contact when the power supply voltage VCC is applied to the drive voltage application terminals 7 and 8 and the ground voltage 0V is applied to the drive voltage application terminals 9 and 10. Voltage on the resistance film 2 at the position where the voltage is applied and the power supply voltage V to the drive voltage applying terminals 8 and 10.
CC is applied, and ground voltage 0V is applied to the drive voltage application terminals 7 and 9.
Tip portion 12 of the coordinate input pen 12 when a voltage is applied
The input coordinates are detected by detecting the voltage on the resistance film 2 at the position where A is in contact.

【０００６】図２４、図２５は、この座標入力装置が有
する問題点を説明するための図であり、図２４は駆動電
圧印加端子７、８に電源電圧ＶＣＣを印加し、駆動電圧
印加端子９、１０に接地電圧０Ｖを印加した場合に、抵
抗膜２に形成される水平方向の等電位線の一部を示して
おり、図２５は駆動電圧印加端子８、１０に電源電圧Ｖ
ＣＣを印加し、駆動電圧印加端子７、９に接地電圧０Ｖ
を印加した場合に、抵抗膜２に形成される垂直方向の等
電位線の一部を示している。24 and 25 are views for explaining the problems of this coordinate input device. In FIG. 24, the power supply voltage VCC is applied to the drive voltage applying terminals 7 and 8 and the drive voltage applying terminal 9 is applied. 10 shows a part of horizontal equipotential lines formed on the resistance film 2 when a ground voltage of 0 V is applied to the drive voltage application terminals 8 and 10.
CC is applied, and ground voltage 0V is applied to the drive voltage application terminals 7 and 9.
Shows a part of vertical equipotential lines formed on the resistance film 2 when the voltage is applied.

【０００７】図２４において、ｉ７ａは駆動電圧印加端
子７から周囲電極３に流れ出て、抵抗膜２を流れ、周囲
電極４を介して駆動電圧印加端子９に流れ込む電流、ｉ
８ａは駆動電圧印加端子８から周囲電極３に流れ出て、
抵抗膜２を流れ、周囲電極４を介して駆動電圧印加端子
１０に流れ込む電流、１４Ａ、１４Ｂ、１４Ｃは抵抗膜
２に形成される等電位線の一部を示している。In FIG. 24, i7a is a current flowing out from the drive voltage applying terminal 7 to the peripheral electrode 3, flowing through the resistance film 2 and flowing into the drive voltage applying terminal 9 through the peripheral electrode 4, i
8a flows out from the drive voltage applying terminal 8 to the surrounding electrode 3,
Currents 14A, 14B, and 14C that flow through the resistance film 2 and flow into the drive voltage application terminal 10 through the peripheral electrode 4 indicate a part of equipotential lines formed on the resistance film 2.

【０００８】ここに、図２４に示すように、駆動電圧印
加端子７、８に電源電圧ＶＣＣを印加し、駆動電圧印加
端子９、１０に接地電圧０Ｖを印加した場合、周囲電極
３に流れる電流ｉ７ａ、ｉ８ａによって、周囲電極３に
は、駆動電圧印加端子７、８側から中央部分にかけて大
きな電圧降下が生じてしまうと共に、周囲電極４に流れ
る電流ｉ７ａ、ｉ８ａによって、周囲電極４には、中央
部分から駆動電圧印加端子９、１０側にかけて大きな電
圧降下が生じてしまう。As shown in FIG. 24, when the power supply voltage VCC is applied to the drive voltage applying terminals 7 and 8 and the ground voltage 0V is applied to the drive voltage applying terminals 9 and 10, the current flowing through the peripheral electrode 3 is generated. Due to i7a and i8a, a large voltage drop occurs in the peripheral electrode 3 from the drive voltage applying terminals 7 and 8 side to the central portion, and at the same time, due to the currents i7a and i8a flowing through the peripheral electrode 4, the peripheral electrode 4 is centered. A large voltage drop occurs from the portion to the drive voltage application terminals 9 and 10.

【０００９】このため、抵抗膜２に形成される水平方向
の等電位線のうち、周囲電極３、４に近い部分の等電位
線１４Ａ、１４Ｃは、周囲電極３、４に平行するもので
はなく、湾曲したものとなってしまい、周囲電極３側か
ら周囲電極４側にかけて、抵抗膜２に直線性の良好でな
い電位分布が生じてしまう。Therefore, of the horizontal equipotential lines formed on the resistance film 2, the equipotential lines 14A and 14C near the peripheral electrodes 3 and 4 are not parallel to the peripheral electrodes 3 and 4. However, the resistance film 2 becomes curved, and a potential distribution having poor linearity is generated in the resistance film 2 from the peripheral electrode 3 side to the peripheral electrode 4 side.

【００１０】また、図２５において、ｉ８ｂは駆動電圧
印加端子８から周囲電極６に流れ出て、抵抗膜２を流
れ、周囲電極５を介して、駆動電圧印加端子７に流れ込
む電流、ｉ１０ｂは駆動電圧印加端子１０から周囲電極
６に流れ出て、抵抗膜２を流れ、周囲電極５を介して駆
動電圧印加端子９に流れ込む電流、１５Ａ、１５Ｂ、１
５Ｃは抵抗膜２に形成される等電位線の一部を示してい
る。In FIG. 25, i8b is a current flowing out from the drive voltage applying terminal 8 to the peripheral electrode 6, flowing through the resistance film 2 and flowing into the drive voltage applying terminal 7 through the peripheral electrode 5, and i10b is a drive voltage. Currents flowing from the applying terminal 10 to the peripheral electrode 6, flowing through the resistance film 2 and flowing into the drive voltage applying terminal 9 via the peripheral electrode 5, 15A, 15B, 1
5C shows a part of equipotential lines formed on the resistance film 2.

【００１１】ここに、図２５に示すように、駆動電圧印
加端子８、１０に電源電圧ＶＣＣを印加し、駆動電圧印
加端子７、９を接地した場合、周囲電極６に流れる電流
ｉ８ｂ、ｉ１０ｂによって、周囲電極６には、駆動電圧
印加端子８、１０側から中央部分にかけて大きな電圧降
下が生じてしまうと共に、周囲電極５に流れる電流ｉ８
ｂ、ｉ１０ｂによって、周囲電極５には、中央部分から
駆動電圧印加端子７、９側にかけて大きな電圧降下が生
じてしまう。As shown in FIG. 25, when the power supply voltage VCC is applied to the drive voltage applying terminals 8 and 10 and the drive voltage applying terminals 7 and 9 are grounded, the currents i8b and i10b flowing through the peripheral electrode 6 cause In the peripheral electrode 6, a large voltage drop occurs from the drive voltage applying terminals 8, 10 side to the central portion, and the current i8 flowing in the peripheral electrode 5 is generated.
Due to b and i10b, a large voltage drop occurs in the peripheral electrode 5 from the central portion to the drive voltage applying terminals 7 and 9 side.

【００１２】このため、抵抗膜２に形成される垂直方向
の等電位線のうち、周囲電極６、５に近い部分の等電位
線１５Ａ、１５Ｃは、周囲電極６、５に平行するもので
はなく、湾曲したものとなってしまい、周囲電極６側か
ら周囲電極５側にかけて、抵抗膜２に直線性の良好でな
い電位分布が生じてしまう。Therefore, of the vertical equipotential lines formed on the resistance film 2, the equipotential lines 15A and 15C near the peripheral electrodes 6 and 5 are not parallel to the peripheral electrodes 6 and 5. However, the resistance film 2 becomes curved, and a potential distribution having poor linearity is generated in the resistance film 2 from the peripheral electrode 6 side to the peripheral electrode 5 side.

【００１３】このように、この座標入力装置において
は、抵抗膜２に直線性の良好な電位分布を発生させるこ
とができず、精度の高い座標入力を行うことができない
という問題点があった。As described above, this coordinate input device has a problem in that it is not possible to generate a potential distribution having good linearity in the resistance film 2 and it is not possible to perform highly accurate coordinate input.

【００１４】そこで、また、従来、図２６に示すよう
に、周辺電極３〜６の平面形状をパラボラ形にすること
により、抵抗膜２の周辺電極３〜６に近い部分の等電位
線の直線性を高め、抵抗膜２に直線性の良好な電位分布
を発生させるという方法が提案されている（前掲特開昭
４７−３６９２３号公報参照）。Therefore, conventionally, as shown in FIG. 26, by forming the peripheral electrodes 3 to 6 into a parabolic shape in plan view, straight lines of equipotential lines near the peripheral electrodes 3 to 6 of the resistance film 2 are formed. There has been proposed a method of enhancing the property and generating a potential distribution with good linearity in the resistance film 2 (see Japanese Patent Laid-Open No. 47-36923).

【００１５】[0015]

【発明が解決しようとする課題】しかし、このように、
周辺電極３〜６の平面形状をパラボラ形にする場合に
は、抵抗膜２上、座標を入力することができる領域が狭
くなってしまうという問題点があった。However, as described above,
When the planar shape of the peripheral electrodes 3 to 6 is parabolic, there is a problem that the area where the coordinates can be input becomes narrow on the resistance film 2.

【００１６】ここに、抵抗膜２と周囲電極３〜６との面
抵抗比を大きくする場合には、周囲電極３〜６の湾曲を
小さくすることができるが、このようにする場合には、
相対的に周囲電極３〜６の抵抗値が減少し、消費電流が
増加してしまうという問題点があった。Here, when the surface resistance ratio between the resistance film 2 and the peripheral electrodes 3 to 6 is increased, the curvature of the peripheral electrodes 3 to 6 can be decreased. However, in such a case,
There has been a problem that the resistance values of the peripheral electrodes 3 to 6 are relatively decreased and the current consumption is increased.

【００１７】また、従来、抵抗膜２に対して一定の間隔
をもって電圧検出用導電膜を対向させ、座標の入力は、
電圧検出用導電膜の入力座標に対応する位置の抵抗膜２
との対向部分を加圧して抵抗膜２に接触させることによ
り行い、入力座標の検出は、抵抗膜２上、電圧検出用導
電膜を介して入力座標として選択された位置の電圧を検
出することにより行うように構成された座標入力装置が
提案されている（特開平６−１８７０８３号公報参
照）。Further, conventionally, the voltage detecting conductive film is opposed to the resistance film 2 at a constant interval, and the coordinates are input.
Resistive film 2 at a position corresponding to the input coordinates of the conductive film for voltage detection
The pressure is applied to the portion opposite to the resistance film 2 to bring it into contact with the resistance film 2, and the input coordinates are detected by detecting the voltage at the position selected as the input coordinates on the resistance film 2 via the voltage detection conductive film. There has been proposed a coordinate input device configured to perform the above (see Japanese Patent Laid-Open No. 6-187083).

【００１８】この座標入力装置においては、電圧検出用
導電膜が抵抗膜２に接触したことが検出された場合に、
直交する方向の電位分布を抵抗膜２に交互に発生させる
ための駆動電圧が駆動電圧印加端子７〜１０に印加され
る。In this coordinate input device, when it is detected that the conductive film for voltage detection contacts the resistive film 2,
A drive voltage for alternately generating a potential distribution in the orthogonal direction on the resistance film 2 is applied to the drive voltage application terminals 7-10.

【００１９】ここに、電圧検出用導電膜が抵抗膜２に接
触したか否かの検出は、電圧検出用導電膜に一定の電圧
を印加すると共に、駆動電圧印加端子７〜１０に接地電
圧０Ｖを印加しておき、電圧検出用導電膜が抵抗膜２に
接触した場合における電圧検出用導電膜の電圧を検出す
ることにより行われる。Here, to detect whether or not the voltage detecting conductive film is in contact with the resistance film 2, a constant voltage is applied to the voltage detecting conductive film and the ground voltage 0V is applied to the drive voltage applying terminals 7-10. Is applied in advance, and the voltage of the conductive film for voltage detection when the conductive film for voltage detection contacts the resistance film 2 is detected.

【００２０】しかし、このように、電圧検出用導電膜の
電圧を検出する方法による場合には、接触抵抗が変化す
ると、検出電圧が変化してしまい、電圧検出用導電膜が
抵抗膜２に接触した場合においても、これを検出するこ
とができず、入力座標の検出を行うことができない場合
が発生してしまうという問題点があった。However, in the case of the method of detecting the voltage of the voltage detecting conductive film as described above, when the contact resistance changes, the detection voltage changes, and the voltage detecting conductive film contacts the resistance film 2. Even in such a case, there is a problem in that this cannot be detected and the input coordinates cannot be detected.

【００２１】本発明は、かかる点に鑑み、精度の高い座
標入力を行うことができるようにした座標入力装置、及
び、抵抗膜に対して一定の間隔をもって電圧検出用導電
膜を対向させてなる座標入力装置であって、電圧検出用
導電膜の抵抗膜に対する接触を確実に検出し、入力座標
の検出を確実に行うことができるようにした座標入力装
置を提供することを目的とする。In view of the above point, the present invention comprises a coordinate input device capable of performing highly accurate coordinate input, and a voltage detection conductive film facing the resistance film at a constant interval. An object of the present invention is to provide a coordinate input device which is capable of surely detecting a contact of a conductive film for voltage detection with a resistance film and surely detecting an input coordinate.

【００２２】[0022]

【課題を解決するための手段】本発明は第１の発明〜第
６の発明を含むものであり、これら第１の発明〜第６の
発明の座標入力装置は、矩形状の基板と、この基板上に
形成された抵抗膜と、この抵抗膜上の周辺部に枠状に形
成され、直交する電位分布を抵抗膜に交互に発生させる
ための駆動電圧が四隅に印加される電位分布発生用電極
とを備え、抵抗膜の所定の領域を直交座標面とする座標
入力パネルを有し、抵抗膜上、入力座標として選択され
た位置の電圧を検出することにより、入力座標の検出を
行う座標入力装置を改良するものである。The present invention includes the first invention to the sixth invention, and the coordinate input device of the first invention to the sixth invention has a rectangular substrate and For generating a potential distribution where a resistance film is formed on the substrate and a driving voltage is applied to the four corners of the resistance film, which is formed in a frame shape in the periphery of the resistance film so as to alternately generate orthogonal potential distributions on the resistance film. A coordinate input panel that has electrodes and has a predetermined area of the resistive film as an orthogonal coordinate plane. Coordinates that detect the input coordinate by detecting the voltage at the position selected as the input coordinate on the resistive film. This is to improve the input device.

【００２３】第１の発明の座標入力装置においては、抵
抗膜は、Ｙ軸（縦軸）方向に延びる垂線及びＸ軸（横
軸）方向に延びる水平線からなる格子状に、かつ、垂線
及び水平線の線幅をそれぞれ同一ないし略同一とし、垂
線及び水平線のピッチがそれぞれ中央部にいくに従って
大きくなるようにパターニングされる。In the coordinate input device according to the first aspect of the invention, the resistance film is in the form of a grid consisting of a vertical line extending in the Y-axis (vertical axis) direction and a horizontal line extending in the X-axis (horizontal axis), and the vertical line and the horizontal line. Are patterned to have the same or substantially the same line width, and the pitches of the vertical lines and the horizontal lines increase toward the central portion.

【００２４】この第１の発明の座標入力装置によれば、
電位分布発生用電極における電圧降下を小さくし、電位
分布発生用電極の近くに形成される等電位線の直線性を
高め、抵抗膜に直線性の良好な電位分布を発生させるこ
とができる。According to the coordinate input device of the first invention,
It is possible to reduce the voltage drop in the potential distribution generation electrode, enhance the linearity of equipotential lines formed near the potential distribution generation electrode, and generate a potential distribution with good linearity in the resistance film.

【００２５】第２の発明の座標入力装置においては、抵
抗膜は、Ｙ軸方向に延びる垂線及びＸ軸方向に延びる水
平線からなる格子状に、かつ、垂線及び水平線のピッチ
をそれぞれ同一ないし略同一とし、垂線及び水平線のう
ち、少なくとも、電位分布発生用電極が長さ方向に重畳
されていない水平線及び垂線の線幅がそれぞれ中央部に
いくに従って小さくなるようにパターニングされる。In the coordinate input device according to the second aspect of the invention, the resistance film is in a grid pattern of vertical lines extending in the Y-axis direction and horizontal lines extending in the X-axis direction, and the pitches of the vertical lines and the horizontal lines are the same or substantially the same. Of the vertical lines and the horizontal lines, at least at least the horizontal lines and the vertical lines on which the potential distribution generation electrodes are not overlapped in the longitudinal direction are patterned so that the line widths become smaller toward the central portion.

【００２６】この第２の発明の座標入力装置によって
も、電位分布発生用電極における電圧降下を小さくし、
電位分布発生用電極の近くに形成される等電位線の直線
性を高め、抵抗膜に直線性の良好な電位分布を発生させ
ることができる。Also according to the coordinate input device of the second invention, the voltage drop in the potential distribution generating electrode is reduced,
It is possible to enhance the linearity of equipotential lines formed in the vicinity of the potential distribution generation electrode and generate a potential distribution with good linearity in the resistance film.

【００２７】第３の発明においては、抵抗膜上の周辺部
に枠状の電位分布発生用電極を設けず、この代わりに、
直交する電位分布を抵抗膜に交互に発生させるための駆
動電圧が印加される駆動電圧印加用電極を抵抗膜の四隅
に設けると共に、抵抗膜の周辺部、かつ、駆動電圧印加
用電極間に、電位分布を発生させるための三角形ないし
略三角形からなる電位分布発生用電極が間隙をもって、
かつ、隣接するもの同士が１８０度ないし略１８０度回
転させた関係となるように配列される。In the third invention, a frame-shaped potential distribution generating electrode is not provided in the peripheral portion on the resistance film, but instead of this,
A drive voltage application electrode to which a drive voltage for alternately generating a potential distribution orthogonal to each other is applied is provided at four corners of the resistance film, and a peripheral portion of the resistance film, and between the drive voltage application electrodes, The potential distribution generating electrodes consisting of a triangle or a substantially triangle for generating the potential distribution have a gap,
In addition, the adjacent elements are arranged so that they are rotated by 180 degrees or approximately 180 degrees.

【００２８】この第３の発明の座標入力装置によれば、
電位分布発生用電極が配列されている部分の電圧降下を
小さくし、電位分布発生用電極が配列されている部分の
近くに形成される等電位線の直線性を高め、抵抗膜に直
線性の良好な電位分布を発生させることができる。According to the coordinate input device of the third invention,
By reducing the voltage drop in the part where the potential distribution generating electrodes are arranged, the linearity of the equipotential lines formed near the part where the potential distribution generating electrodes are arranged is increased, A good potential distribution can be generated.

【００２９】第４の発明の座標入力装置においては、抵
抗膜上、入力座標として選択された位置の電圧と、電位
分布発生用電極の所定の位置の電圧とを検出して、抵抗
膜上、入力座標として選択された位置の電圧と、電位分
布発生用電極の所定の位置の電圧とから入力座標を検出
する入力座標検出手段が設けられる。In the coordinate input device according to the fourth aspect of the present invention, the voltage at the position selected as the input coordinate on the resistance film and the voltage at the predetermined position of the potential distribution generating electrode are detected to detect the voltage on the resistance film. An input coordinate detecting means is provided for detecting the input coordinate from the voltage at the position selected as the input coordinate and the voltage at the predetermined position of the potential distribution generating electrode.

【００３０】この第４の発明の座標入力装置によれば、
抵抗膜に発生する電位分布の非線形性を考慮し、実際に
入力された座標の検出を行うことができる。According to the coordinate input device of the fourth invention,
The coordinates input actually can be detected in consideration of the nonlinearity of the potential distribution generated in the resistance film.

【００３１】なお、電位分布発生用電極の所定の位置の
電圧を検出する手段として、電位分布発生用電極を構成
する各辺の中央部ないし略中央部に、その先端を抵抗膜
上に突出させ、かつ、抵抗膜に接触させた電位分布発生
用電極よりも低抵抗の電圧検出用電極を設ける場合に
は、電位分布発生用電極の近くに形成される等電位線の
湾曲を緩和することができる。As a means for detecting the voltage at a predetermined position of the potential distribution generating electrode, the tip thereof is projected onto the resistive film at the central portion or substantially central portion of each side constituting the potential distribution generating electrode. In addition, when a voltage detection electrode having a lower resistance than the potential distribution generation electrode in contact with the resistance film is provided, the curvature of the equipotential line formed near the potential distribution generation electrode can be relaxed. it can.

【００３２】第５の発明の座標入力装置においては、電
位分布発生用電極の所定の位置の電圧を検出して、抵抗
膜に発生する電位分布の直線性を高めるための駆動電圧
を電位分布発生用電極の所定の位置に印加する電圧検出
・駆動電圧発生手段が備えられる。In the coordinate input device of the fifth aspect of the invention, the voltage at a predetermined position of the potential distribution generating electrode is detected, and the driving voltage for enhancing the linearity of the potential distribution generated in the resistance film is generated. A voltage detecting / driving voltage generating means for applying to a predetermined position of the working electrode is provided.

【００３３】この第５の発明の座標入力装置によれば、
電圧検出・駆動電圧発生手段により、電位分布発生用電
極の近くに形成される等電位線の直線性を高め、抵抗膜
に直線性の良好な電位分布を発生させることができる。According to the coordinate input device of the fifth invention,
The voltage detecting / driving voltage generating means can enhance the linearity of equipotential lines formed near the potential distribution generating electrode, and generate a potential distribution with good linearity in the resistance film.

【００３４】なお、この場合も、電位分布発生用電極の
所定の位置の電圧を検出する手段として、電位分布発生
用電極を構成する各辺の中央部ないし略中央部に、その
先端を抵抗膜上に突出させ、かつ、抵抗膜に接触させた
電位分布発生用電極よりも低抵抗の電圧検出用電極を設
けるようにしても良い。Also in this case, as a means for detecting the voltage at a predetermined position of the potential distribution generating electrode, the tip of the resistance film is formed at the central portion or substantially central portion of each side constituting the potential distribution generating electrode. It is also possible to provide a voltage detection electrode having a resistance lower than that of the potential distribution generation electrode that protrudes upward and is in contact with the resistance film.

【００３５】第６の発明の座標入力装置は、座標入力パ
ネルとして、抵抗膜に対して一定の間隔をもって対向さ
せた電圧検出用導電膜を有する座標入力パネルを使用
し、入力座標の選択は、電圧検出用導電膜の入力座標に
対応する位置の抵抗膜との対向部分を抵抗膜に接触させ
ることにより行い、入力座標の検出は、抵抗膜上、電圧
検出用導電膜を介して入力座標として選択された位置の
電圧を検出することにより行うものであり、この第６の
発明の座標入力装置においては、電圧検出用導電膜が抵
抗膜に接触した場合に、電圧検出用導電膜側から抵抗膜
側に電流を流し、この電流を検出することにより、電圧
検出用導電膜が抵抗膜に接触したことを検出する電圧検
出用導電膜接触検出手段と、この電圧検出用導電膜接触
検出手段により電圧検出用導電膜が前記抵抗膜に接触し
たことが検出された場合に、駆動電圧を座標入力パネル
に供給する駆動電圧供給手段とが備えられる。In the coordinate input device of the sixth invention, a coordinate input panel having a voltage detecting conductive film facing the resistance film at a constant interval is used as the coordinate input panel. The part of the voltage detection conductive film facing the resistance film at the position corresponding to the input coordinates is brought into contact with the resistance film, and the input coordinates are detected as the input coordinates on the resistance film through the voltage detection conductive film. This is performed by detecting the voltage at the selected position. In the coordinate input device according to the sixth aspect of the present invention, when the conductive film for voltage detection contacts the resistive film, the resistance is detected from the conductive film side for voltage detection. A voltage detecting conductive film contact detecting means for detecting that the voltage detecting conductive film is in contact with the resistance film by applying a current to the film side and detecting this current, and a voltage detecting conductive film contact detecting means. Voltage When the conductive film for out in contact with the resistance film is detected, and the drive voltage supplying means for supplying the coordinate input panel is provided with a driving voltage.

【００３６】この第６の発明の座標入力装置によれば、
電圧検出用導電膜が抵抗膜に接触したか否かの検出は、
電圧検出用導電膜側から抵抗膜側に流れる電流を検出す
ることにより行われるので、接触抵抗が変化した場合に
おいても、確実な検出を行うことができる。According to the coordinate input device of the sixth invention,
The detection whether the conductive film for voltage detection contacts the resistive film is
Since it is performed by detecting the current flowing from the voltage detection conductive film side to the resistance film side, reliable detection can be performed even when the contact resistance changes.

【００３７】[0037]

【発明の実施の形態】以下、図１〜図２２を参照して、
本発明の座標入力装置の実施の第１の形態〜第９の形態
について説明する。BEST MODE FOR CARRYING OUT THE INVENTION Referring to FIGS.
First to ninth embodiments of the coordinate input device of the present invention will be described.

【００３８】第１の形態・・図１〜図６ 図１は本発明の座標入力装置の実施の第１の形態の要部
を概略的に示す図である。図１中、２０は座標入力パネ
ルであり、２１は座標面、２２〜２５は座標面２１の周
囲に枠状、かつ、帯状に一体として形成された電位分布
発生用電極をなす周囲電極である。First Embodiment FIG. 1 to FIG. 6 FIG. 1 is a diagram schematically showing a main part of a first embodiment of a coordinate input device according to the present invention. In FIG. 1, 20 is a coordinate input panel, 21 is a coordinate surface, and 22 to 25 are peripheral electrodes forming a potential distribution generating electrode integrally formed in a frame-like and band-like shape around the coordinate surface 21. .

【００３９】また、２６〜２９は駆動電圧が印加される
駆動電圧印加端子であり、駆動電圧印加端子２６には電
源電圧ＶＣＣ又は接地電圧０Ｖが印加され、駆動電圧印
加端子２７には電源電圧ＶＣＣが印加され、駆動電圧印
加端子２８には接地電圧０Ｖが印加され、駆動電圧印加
端子２９には電源電圧ＶＣＣ又は接地電圧０Ｖが印加さ
れる。Reference numerals 26 to 29 denote drive voltage applying terminals to which a drive voltage is applied. The drive voltage applying terminal 26 is applied with the power supply voltage VCC or the ground voltage 0V, and the drive voltage applying terminal 27 is applied with the power supply voltage VCC. Is applied, the ground voltage 0V is applied to the drive voltage application terminal 28, and the power supply voltage VCC or the ground voltage 0V is applied to the drive voltage application terminal 29.

【００４０】また、３０は駆動電圧印加端子２６、２９
に電源電圧ＶＣＣ又は接地電圧０Ｖを印加するためのス
イッチ回路であり、このスイッチ回路３０は、駆動電圧
印加端子２６に電源電圧ＶＣＣを印加する場合には、駆
動電圧印加端子２９に接地電圧０Ｖを印加し、駆動電圧
印加端子２６に接地電圧０Ｖを印加する場合には、駆動
電圧印加端子２９に電源電圧ＶＣＣを印加するように制
御される。Further, 30 is a drive voltage applying terminal 26, 29.
Is a switch circuit for applying the power supply voltage VCC or the ground voltage 0V to the drive voltage application terminal. When the power supply voltage VCC is applied to the drive voltage application terminal 26, the switch circuit 30 applies the ground voltage 0V to the drive voltage application terminal 29. When applying and applying the ground voltage 0V to the drive voltage application terminal 26, the power supply voltage VCC is controlled to be applied to the drive voltage application terminal 29.

【００４１】また、３１は先端部３１Ａを座標面２１に
接触させることにより座標入力を行う座標入力ペン、３
２はスイッチ制御信号によりスイッチ回路３０を制御す
ると共に、座標入力ペン３１の先端部３１Ａが接触した
座標面２１上の座標を検出する入力座標検出回路であ
る。Reference numeral 31 denotes a coordinate input pen for inputting coordinates by bringing the tip end 31A into contact with the coordinate surface 21.
An input coordinate detection circuit 2 controls the switch circuit 30 by a switch control signal and detects the coordinates on the coordinate surface 21 with which the tip portion 31A of the coordinate input pen 31 contacts.

【００４２】また、図２は座標入力パネル２０を示す概
略的平面図であり、３４はガラス基板、３５はガラス基
板３４上に形成された、かつ、抵抗値を周囲電極２２〜
２５よりも大きくする抵抗膜である。FIG. 2 is a schematic plan view showing the coordinate input panel 20, where 34 is a glass substrate, 35 is formed on the glass substrate 34, and the resistance values are set to the peripheral electrodes 22 to.
The resistance film is made larger than 25.

【００４３】ここに、抵抗膜３５は、Ｙ軸方向に延びる
垂線及びＸ軸方向に延びる水平線からなる格子状に、か
つ、垂線の線幅ＷＶ及び水平線の線幅ＷＨをそれぞれ同
一ないし略同一とし、図３及び図４にも示すように、垂
線のピッチＰＶ及び水平線のピッチＰＨが中央部にいく
に従って大きくなるようにパターニングされている。Here, the resistance film 35 has a lattice shape composed of a vertical line extending in the Y-axis direction and a horizontal line extending in the X-axis direction, and the line width WV of the vertical line and the line width WH of the horizontal line are the same or substantially the same. As shown in FIGS. 3 and 4, the vertical line pitch PV and the horizontal line pitch PH are patterned so as to increase toward the central portion.

【００４４】この場合、垂線の線幅ＷＶ、水平線の線幅
ＷＨ、垂線のピッチＰＶ及び水平線のピッチＰＨは、座
標入力ペン３１の先端部３１Ａが必ず抵抗膜３５に接触
するように、その大きさが選択され、ＷＶ＝ＷＨとする
こともできる。In this case, the vertical line width WV, the horizontal line width WH, the vertical line pitch PV and the horizontal line pitch PH are so large that the tip portion 31A of the coordinate input pen 31 always contacts the resistance film 35. Can be selected and WV = WH.

【００４５】このようなパターンを有する抵抗膜３５
は、ＩＴＯ膜で形成するのであれば、エッチングにより
形成でき、カーボン膜で形成するのであれば、スクリー
ン印刷等により形成することができる。The resistance film 35 having such a pattern
Can be formed by etching if it is formed of an ITO film, and can be formed by screen printing or the like if formed of a carbon film.

【００４６】本発明の座標入力装置の実施の第１の形態
においては、入力座標の検出は、駆動電圧印加端子２
６、２７に電源電圧ＶＣＣを印加し、駆動電圧印加端子
２８、２９に接地電圧０Ｖを印加した場合における座標
入力ペン３１の先端部３１Ａが接触している位置の抵抗
膜３５上の電圧と、駆動電圧印加端子２７、２９に電源
電圧ＶＣＣを印加し、駆動電圧印加端子２６、２８に接
地電圧０Ｖを印加した場合における座標入力ペン３１の
先端部３１Ａが接触している位置の抵抗膜３５上の電圧
とを検出することにより行われる。In the first embodiment of the coordinate input device of the present invention, the input voltage is detected by the drive voltage applying terminal 2
The voltage on the resistance film 35 at the position where the tip portion 31A of the coordinate input pen 31 is in contact when the power supply voltage VCC is applied to the terminals 6 and 27 and the ground voltage 0V is applied to the drive voltage application terminals 28 and 29, When the power supply voltage VCC is applied to the drive voltage applying terminals 27 and 29 and the ground voltage 0V is applied to the drive voltage applying terminals 26 and 28, the tip end 31A of the coordinate input pen 31 is in contact with the resistive film 35. Is detected by detecting the voltage.

【００４７】図５及び図６は、本発明の座標入力装置の
実施の第１の形態の作用、効果を説明するための図であ
り、図５は、駆動電圧印加端子２６、２７に電源電圧Ｖ
ＣＣを印加し、駆動電圧印加端子２８、２９に接地電圧
０Ｖを印加した場合に、抵抗膜３５に形成される水平方
向の等電位線の一部を示しており、図６は、駆動電圧印
加端子２７、２９に電源電圧ＶＣＣを印加し、駆動電圧
印加端子２６、２８に接地電圧０Ｖを印加した場合に、
抵抗膜３５に形成される垂直方向の等電位線の一部を示
している。FIGS. 5 and 6 are views for explaining the operation and effect of the first embodiment of the coordinate input device of the present invention. FIG. 5 shows the drive voltage applying terminals 26 and 27 at the power supply voltage. V
FIG. 6 shows a part of horizontal equipotential lines formed on the resistance film 35 when CC is applied and a ground voltage of 0 V is applied to the drive voltage application terminals 28 and 29. FIG. When the power supply voltage VCC is applied to the terminals 27 and 29 and the ground voltage 0V is applied to the drive voltage applying terminals 26 and 28,
A part of vertical equipotential lines formed on the resistance film 35 is shown.

【００４８】図５において、ｉ２６ａは駆動電圧印加端
子２６から周囲電極２２に流れ出て、抵抗膜３５を流
れ、周囲電極２３を介して駆動電圧印加端子２８に流れ
込む電流、ｉ２７ａは駆動電圧印加端子２７から周囲電
極２２に流れ出て、抵抗膜３５を流れ、周囲電極２３を
介して駆動電圧印加端子２９に流れ込む電流、３７Ａ、
３７Ｂ、３７Ｃは抵抗膜３５に形成される水平方向の等
電位線の一部を示している。In FIG. 5, i26a is a current flowing from the drive voltage applying terminal 26 to the peripheral electrode 22, flowing through the resistance film 35, and flowing into the drive voltage applying terminal 28 via the peripheral electrode 23, i27a is the drive voltage applying terminal 27. Current flowing out of the peripheral electrode 22 to the resistance film 35 and flowing into the drive voltage applying terminal 29 through the peripheral electrode 23, 37A,
37B and 37C show a part of horizontal equipotential lines formed on the resistance film 35.

【００４９】ここに、本発明の座標入力装置の実施の第
１の形態においては、抵抗膜３５は、垂線の線幅ＷＶを
同一ないし略同一とし、垂線のピッチＰＶが中央部にい
くに従って大きくなるようにパターニングされている。Here, in the first embodiment of the coordinate input device of the present invention, the resistance film 35 has the same or substantially the same line width WV of the perpendiculars, and the pitch PV of the perpendiculars increases as it goes to the central portion. Is patterned so that

【００５０】この結果、抵抗膜３５に流れ込む電流ｉ２
６ａのうち、周囲電極２４に近い部分に流れ込む電流の
電流値と、中央部分に近い部分に流れ込む電流の電流値
との差は、従来例以上に大きくなると共に、抵抗膜３５
に流れ込む電流ｉ２７ａのうち、周囲電極２５に近い部
分に流れ込む電流の電流値と、中央部分に近い部分に流
れ込む電流の電流値との差も、従来例以上に大きくな
る。As a result, the current i2 flowing into the resistance film 35
6a, the difference between the current value of the current flowing into the portion close to the peripheral electrode 24 and the current value of the current flowing into the portion close to the central portion is larger than in the conventional example, and the resistance film 35 is formed.
The difference between the current value of the current flowing into the portion close to the peripheral electrode 25 and the current value of the current flowing into the portion near the central portion of the current i27a flowing into the current i27a is larger than in the conventional example.

【００５１】即ち、電流ｉ２６ａ、ｉ２７ａにより周囲
電極２２に発生する駆動電圧印加端子２６、２７側から
中央部分にかけての電圧降下は、従来例の場合よりも小
さくなると共に、電流ｉ２６ａ、ｉ２７ａにより周囲電
極２３に発生する中央部分から駆動電圧印加端子２８、
２９側にかけての電圧降下も、従来例の場合よりも小さ
くなる。That is, the voltage drop from the drive voltage applying terminals 26, 27 side to the central portion generated in the peripheral electrode 22 by the currents i26a, i27a becomes smaller than that in the conventional example, and the currents i26a, i27a cause the peripheral electrodes to fall. Drive voltage applying terminal 28 from the central portion generated in 23,
The voltage drop across the 29 side is also smaller than in the case of the conventional example.

【００５２】この結果、抵抗膜３５に形成される水平方
向の等電位線のうち、周囲電極２２、２３に近い部分の
等電位線３７Ａ、３７Ｃを周囲電極２２、２３に平行な
ものとすることができ、周囲電極２２側から周囲電極２
３側にかけて、抵抗膜３５に直線性の良好な電位分布が
発生する。As a result, of the horizontal equipotential lines formed on the resistance film 35, the equipotential lines 37A and 37C near the peripheral electrodes 22 and 23 are parallel to the peripheral electrodes 22 and 23. And the surrounding electrode 2 from the surrounding electrode 22 side.
A potential distribution having good linearity is generated in the resistance film 35 toward the third side.

【００５３】また、図６において、ｉ２７ｂは駆動電圧
印加端子２７から周囲電極２５に流れ出て、抵抗膜３５
を流れ、周囲電極２４を介して駆動電圧印加端子２６に
流れ込む電流、ｉ２９ｂは駆動電圧印加端子２９から周
囲電極２５に流れ出て、抵抗膜３５を流れ、周囲電極２
４を介して駆動電圧印加端子２８に流れ込む電流、３９
Ａ、３９Ｂ、３９Ｃは抵抗膜３５に形成される垂直方向
の等電位線の一部を示している。Further, in FIG. 6, i27b flows out from the drive voltage applying terminal 27 to the peripheral electrode 25, and the resistance film 35
Current flowing into the driving voltage applying terminal 26 through the peripheral electrode 24, i29b flows out from the driving voltage applying terminal 29 to the peripheral electrode 25, flows through the resistance film 35, and the surrounding electrode 2
Current flowing into the drive voltage applying terminal 28 via
A, 39B, and 39C show part of vertical equipotential lines formed on the resistance film 35.

【００５４】ここに、本発明の座標入力装置の実施の第
１の形態においては、抵抗膜３５は、水平線の線幅ＷＨ
を同一ないし略同一とし、水平線のピッチＰＨが中央部
にいくに従って大きくなるようにパターニングされてい
る。Here, in the first embodiment of the coordinate input device of the present invention, the resistance film 35 has the line width WH of the horizontal line.
Are the same or substantially the same, and are patterned so that the pitch PH of the horizontal lines increases toward the central portion.

【００５５】この結果、抵抗膜３５に流れ込む電流ｉ２
７ｂのうち、周囲電極２２に近い部分に流れ込む電流の
電流値と、中央部分に近い部分に流れ込む電流の電流値
との差は、従来例以上に大きくなると共に、抵抗膜３５
に流れ込む電流ｉ２９ｂのうち、周囲電極２３に近い部
分に流れ込む電流の電流値と、中央部分に近い部分に流
れ込む電流の電流値との差も、従来例以上に大きくな
る。As a result, the current i2 flowing into the resistance film 35
7b, the difference between the current value of the current flowing in the portion close to the peripheral electrode 22 and the current value of the current flowing in the portion close to the central portion is larger than in the conventional example, and the resistance film 35 is formed.
The difference between the current value of the current flowing into the portion near the peripheral electrode 23 and the current value of the current flowing into the portion near the central portion of the current i29b flowing into the current i29b is larger than in the conventional example.

【００５６】即ち、電流ｉ２７ｂ、ｉ２９ｂにより周囲
電極２５に発生する駆動電圧印加端子２７、２９側から
中央部分にかけての電圧降下は、従来例の場合よりも小
さくなると共に、電流ｉ２７ｂ、ｉ２９ｂにより周囲電
極２４に発生する中央部分から駆動電圧印加端子２６、
２８側にかけての電圧降下も、従来例の場合よりも小さ
くなる。That is, the voltage drop from the drive voltage applying terminals 27, 29 side to the central portion generated in the peripheral electrodes 25 by the currents i27b, i29b becomes smaller than that in the conventional example, and the currents i27b, i29b cause the peripheral electrodes 25. Drive voltage application terminal 26,
The voltage drop across the 28 side is also smaller than in the case of the conventional example.

【００５７】この結果、抵抗膜３５に形成される垂直方
向の等電位線のうち、周囲電極２５、２４に近い部分の
等電位線３９Ａ、３９Ｃを周囲電極２５、２４に平行な
ものとすることができ、周囲電極２５側から周囲電極２
４側にかけて、抵抗膜３５に直線性の良好な電位分布が
発生する。As a result, of the vertical equipotential lines formed on the resistance film 35, the equipotential lines 39A and 39C near the peripheral electrodes 25 and 24 are made parallel to the peripheral electrodes 25 and 24. And the surrounding electrode 2 from the surrounding electrode 25 side.
A potential distribution having good linearity is generated in the resistance film 35 toward the fourth side.

【００５８】このように、本発明の座標入力装置の実施
の第１の形態によれば、周囲電極２２側から周囲電極２
３側にかけて、抵抗膜３５に直線性の良好な電位分布を
発生させることができると共に、周囲電極２５側から周
囲電極２４側にかけて、抵抗膜３５に直線性の良好な電
位分布を発生させることができるので、精度の高い座標
入力を行うことができる。As described above, according to the first embodiment of the coordinate input device of the present invention, the peripheral electrode 2 is arranged from the peripheral electrode 22 side.
It is possible to generate a good linearity potential distribution in the resistance film 35 toward the third side, and to generate a good linearity potential distribution in the resistance film 35 from the peripheral electrode 25 side to the peripheral electrode 24 side. Therefore, highly accurate coordinate input can be performed.

【００５９】第２の形態・・図７〜図１１ 本発明の座標入力装置の実施の第２の形態は、座標入力
パネルとして、図７に示す座標入力パネルを備え、その
他については、図１に示す本発明の座標入力装置の実施
の第１の形態と同様に構成されるものである。Second Embodiment ... FIGS. 7 to 11 The second embodiment of the coordinate input device according to the present invention is provided with the coordinate input panel shown in FIG. 7 as a coordinate input panel, and the others are shown in FIG. The coordinate input device according to the first embodiment of the present invention shown in FIG.

【００６０】図７中、４１は座標面、４２〜４５は座標
面４１の周囲に枠状、かつ、帯状に一体として形成され
た電位分布発生用電極をなす周囲電極、４６〜４９は駆
動電圧が印加される駆動電圧印加端子である。In FIG. 7, reference numeral 41 is a coordinate plane, 42 to 45 are peripheral electrodes forming a potential distribution generating electrode integrally formed in a frame shape and a strip shape around the coordinate surface 41, and 46 to 49 are drive voltages. Is a drive voltage application terminal to which is applied.

【００６１】駆動電圧印加端子４６には電源電圧ＶＣＣ
又は接地電圧０Ｖが印加され、駆動電圧印加端子４７に
は電源電圧ＶＣＣが印加され、駆動電圧印加端子４８に
は接地電圧０Ｖが印加され、駆動電圧印加端子４９には
電源電圧ＶＣＣ又は接地電圧０Ｖが印加される。The drive voltage applying terminal 46 has a power supply voltage VCC
Alternatively, the ground voltage 0V is applied, the power supply voltage VCC is applied to the drive voltage application terminal 47, the ground voltage 0V is applied to the drive voltage application terminal 48, and the power supply voltage VCC or the ground voltage 0V is applied to the drive voltage application terminal 49. Is applied.

【００６２】また、５０はガラス基板、５１はガラス基
板５０上に形成された、かつ、周囲電極４２〜４５より
も抵抗値を大きくする抵抗膜である。Further, 50 is a glass substrate, and 51 is a resistance film formed on the glass substrate 50 and having a resistance value larger than that of the peripheral electrodes 42 to 45.

【００６３】ここに、抵抗膜５１は、Ｙ軸方向に延びる
垂線及びＸ軸方向に延びる水平線からなる格子状に、か
つ、垂線のピッチＰＶ及び水平線のピッチＰＨをそれぞ
れ同一ないし略同一とし、図８及び図９にも示すよう
に、垂線及び水平線のうち、周辺部の垂線及び水平線、
即ち、周囲電極４２〜４５がそれぞれ長さ方向に重畳さ
れていない垂線の線幅ＷＶ及び水平線の線幅ＷＨがそれ
ぞれ中央部にいくに従って小さくなるようにパターニン
グされている。Here, the resistance film 51 has a lattice shape composed of vertical lines extending in the Y-axis direction and horizontal lines extending in the X-axis direction, and the pitch PV of the vertical lines and the pitch PH of the horizontal lines are the same or substantially the same. As shown in FIG. 8 and FIG. 9, among the vertical lines and horizontal lines, the vertical lines and horizontal lines in the peripheral portion,
That is, the peripheral electrodes 42 to 45 are patterned so that the line width WV of a perpendicular line and the line width WH of a horizontal line which are not overlapped in the length direction become smaller toward the central portion.

【００６４】この場合、垂線の線幅ＷＶ、水平線の線幅
ＷＨ、垂線のピッチＰＶ及び水平線のピッチＰＨは、座
標入力ペン３１の先端部３１Ａが必ず抵抗膜５１に接触
するように、その大きさが選択され、ＰＶ＝ＰＨとする
こともできる。In this case, the vertical line width WV, the horizontal line width WH, the vertical line pitch PV, and the horizontal line pitch PH are so large that the tip portion 31A of the coordinate input pen 31 always contacts the resistance film 51. Can be selected and PV = PH.

【００６５】このようなパターンを有する抵抗膜５１
は、ＩＴＯ膜で形成するのであれば、エッチングにより
形成でき、カーボン膜で形成するのであれば、スクリー
ン印刷等により形成することができる。The resistance film 51 having such a pattern
Can be formed by etching if it is formed of an ITO film, and can be formed by screen printing or the like if formed of a carbon film.

【００６６】本発明の座標入力装置の実施の第２の形態
においては、入力座標の検出は、駆動電圧印加端子４
６、４７に電源電圧ＶＣＣを印加し、駆動電圧印加端子
４８、４９に接地電圧０Ｖを印加した場合における座標
入力ペン３１の先端部３１Ａが接触している位置の抵抗
膜５１上の電圧と、駆動電圧印加端子４７、４９に電源
電圧ＶＣＣを印加し、駆動電圧印加端子４６、４８に接
地電圧０Ｖを印加した場合における座標入力ペン３１の
先端部３１Ａが接触した位置の抵抗膜５１上の電圧とを
検出することにより行われる。In the second embodiment of the coordinate input device of the present invention, the input coordinate is detected by the drive voltage applying terminal 4
The voltage on the resistance film 51 at the position where the tip portion 31A of the coordinate input pen 31 is in contact when the power supply voltage VCC is applied to 6, 47 and the ground voltage 0V is applied to the drive voltage application terminals 48, 49; The voltage on the resistance film 51 at the position where the tip portion 31A of the coordinate input pen 31 contacts when the power supply voltage VCC is applied to the drive voltage application terminals 47 and 49 and the ground voltage 0V is applied to the drive voltage application terminals 46 and 48. It is performed by detecting and.

【００６７】図１０及び図１１は、本発明の座標入力装
置の実施の第２の形態の作用、効果を説明するための図
であり、図１０は、駆動電圧印加端子４６、４７に電源
電圧ＶＣＣを印加し、駆動電圧印加端子４８、４９に接
地電圧０Ｖを印加した場合に、抵抗膜５１に形成される
水平方向の等電位線の一部を示しており、図１１は、駆
動電圧印加端子４７、４９に電源電圧ＶＣＣを印加し、
駆動電圧印加端子４６、４８に接地電圧０Ｖを印加した
場合に、抵抗膜５１に形成される垂直方向の等電位線の
一部を示している。FIGS. 10 and 11 are diagrams for explaining the operation and effect of the second embodiment of the coordinate input device of the present invention. FIG. 10 shows the drive voltage applying terminals 46 and 47 at the power supply voltage. FIG. 11 shows a part of horizontal equipotential lines formed on the resistance film 51 when VCC is applied and a ground voltage of 0 V is applied to the drive voltage application terminals 48 and 49. FIG. Apply the power supply voltage VCC to the terminals 47 and 49,
A part of vertical equipotential lines formed in the resistance film 51 when a ground voltage of 0 V is applied to the drive voltage application terminals 46 and 48 is shown.

【００６８】図１０において、ｉ４６ａは駆動電圧印加
端子４６から周囲電極４２に流れ出て、抵抗膜５１を流
れ、周囲電極４３を介して駆動電圧印加端子４８に流れ
込む電流、ｉ４７ａは駆動電圧印加端子４７から周囲電
極４２に流れ出て、抵抗膜５１を流れ、周囲電極４３を
介して駆動電圧印加端子４９に流れ込む電流、５３Ａ、
５３Ｂ、５３Ｃは抵抗膜５１に形成される水平方向の等
電位線の一部を示している。In FIG. 10, i46a is a current flowing from the drive voltage applying terminal 46 to the peripheral electrode 42, flowing through the resistance film 51, and flowing into the drive voltage applying terminal 48 through the peripheral electrode 43, and i47a is the drive voltage applying terminal 47. Current flowing from the peripheral electrode 42 to the peripheral electrode 42, flowing through the resistance film 51, and flowing into the drive voltage applying terminal 49 via the peripheral electrode 43, 53A,
Reference numerals 53B and 53C indicate part of horizontal equipotential lines formed on the resistance film 51.

【００６９】ここに、本発明の座標入力装置の実施の第
２の形態においては、抵抗膜５１は、垂線のピッチＰＶ
を同一ないし略同一とし、垂線のうち、周辺部の垂線、
即ち、周囲電極４４、４５がそれぞれ長さ方向に重畳さ
れていない垂線の線幅ＷＶが中央部にいくに従って小さ
くなるようにパターニングされている。Here, in the second embodiment of the coordinate input device of the present invention, the resistance film 51 has the pitch PV of the perpendicular line.
Are the same or substantially the same, and among the perpendiculars, the perpendiculars of the peripheral portion,
That is, the peripheral electrodes 44 and 45 are patterned so that the line width WV of a perpendicular line which is not overlapped in the lengthwise direction becomes smaller toward the central portion.

【００７０】この結果、抵抗膜５１に流れ込む電流ｉ４
６ａのうち、周囲電極４４に近い部分に流れ込む電流の
電流値と、中央部分に近い部分に流れ込む電流の電流値
との差は、従来例以上に大きくなると共に、抵抗膜５１
に流れ込む電流ｉ４７ａのうち、周囲電極４５に近い部
分に流れ込む電流の電流値と、中央部分に近い部分に流
れ込む電流の電流値との差も、従来例以上に大きくな
る。As a result, the current i4 flowing into the resistance film 51 is increased.
In 6a, the difference between the current value of the current flowing into the portion close to the peripheral electrode 44 and the current value of the current flowing into the portion close to the central portion is larger than in the conventional example, and the resistance film 51 is formed.
The difference between the current value of the current flowing in the portion near the peripheral electrode 45 and the current value of the current flowing in the portion near the central portion of the current i47a flowing into the current i47a is larger than in the conventional example.

【００７１】即ち、電流ｉ４６ａ、ｉ４７ａにより周囲
電極４２に発生する駆動電圧印加端子４６、４７側から
中央部分にかけての電圧降下は、従来例の場合よりも小
さくなると共に、電流ｉ４６ａ、ｉ４７ａにより周囲電
極４３に発生する中央部分から駆動電圧印加端子４８、
４９側にかけての電圧降下も、従来例の場合よりも小さ
くなる。That is, the voltage drop from the drive voltage applying terminals 46, 47 side to the central portion generated in the peripheral electrode 42 by the currents i46a, i47a becomes smaller than that in the conventional example, and the currents i46a, i47a cause the peripheral electrodes 42, 47a. Drive voltage applying terminal 48 from the central portion generated at 43,
The voltage drop across the 49 side is also smaller than in the case of the conventional example.

【００７２】この結果、抵抗膜５１に形成される水平方
向の等電位線のうち、周囲電極４２、４３に近い部分の
等電位線５３Ａ、５３Ｃを周囲電極４２、４３に平行な
ものとすることができ、周囲電極４２側から周囲電極４
３側にかけて、抵抗膜５１に直線性の良好な電位分布が
発生する。As a result, of the horizontal equipotential lines formed on the resistance film 51, the equipotential lines 53A and 53C near the peripheral electrodes 42 and 43 are parallel to the peripheral electrodes 42 and 43. And the surrounding electrode 4 from the surrounding electrode 42 side.
A potential distribution with good linearity is generated in the resistance film 51 toward the third side.

【００７３】また、図１１において、ｉ４７ｂは駆動電
圧印加端子４７から周囲電極４５に流れ出て、抵抗膜５
１を流れ、周囲電極４４を介して駆動電圧印加端子４６
に流れ込む電流、ｉ４９ｂは駆動電圧印加端子４９から
周囲電極４５に流れ出て、抵抗膜５１を流れ、周囲電極
４４を介して駆動電圧印加端子４８に流れ込む電流、５
５Ａ、５５Ｂ、５５Ｃは抵抗膜５１に形成される垂直方
向の等電位線の一部を示している。Further, in FIG. 11, i47b flows out from the driving voltage applying terminal 47 to the peripheral electrode 45, and the resistance film 5
1 and the driving voltage applying terminal 46 through the surrounding electrode 44.
I49b flows out from the drive voltage applying terminal 49 to the peripheral electrode 45, flows through the resistance film 51, and flows into the drive voltage applying terminal 48 via the peripheral electrode 44.
Reference numerals 5A, 55B, and 55C show a part of vertical equipotential lines formed on the resistance film 51.

【００７４】ここに、本発明の座標入力装置の実施の第
２の形態においては、抵抗膜５１は、水平線のピッチＰ
Ｈを同一ないし略同一とし、水平線のうち、周辺部の水
平線、即ち、周囲電極４２、４３が長さ方向に重畳され
ていない水平線の線幅ＷＨが中央部になるに従って小さ
くなるようにパターニングされている。Here, in the second embodiment of the coordinate input device of the present invention, the resistance film 51 has the pitch P of the horizontal lines.
H is the same or substantially the same, and is patterned so that the line width WH of the peripheral horizontal line, that is, the horizontal line where the peripheral electrodes 42 and 43 are not overlapped in the longitudinal direction, becomes smaller toward the central part. ing.

【００７５】この結果、抵抗膜５１に流れ込む電流ｉ４
７ｂのうち、周囲電極４２に近い部分に流れ込む電流の
電流値と、中央部分に近い部分に流れ込む電流の電流値
との差は、従来例以上に大きくなると共に、抵抗膜５１
に流れ込む電流ｉ４９ｂのうち、周囲電極４３に近い部
分に流れ込む電流の電流値と、中央部分に近い部分に流
れ込む電流の電流値との差も、従来例以上に大きくな
る。As a result, the current i4 flowing into the resistance film 51 is increased.
7b, the difference between the current value of the current flowing into the portion near the peripheral electrode 42 and the current value of the current flowing into the portion near the central portion is larger than in the conventional example, and the resistance film 51 is formed.
The difference between the current value of the current flowing into the portion near the peripheral electrode 43 and the current value of the current flowing into the portion near the central portion of the current i49b flowing into the current i49b is larger than that in the conventional example.

【００７６】即ち、電流ｉ４７ｂ、ｉ４９ｂにより周囲
電極４５に発生する駆動電圧印加端子４７、４９側から
中央部分にかけての電圧降下は、従来例の場合よりも小
さくなると共に、電流ｉ４７ｂ、ｉ４９ｂにより周囲電
極４４に発生する中央部分から駆動電圧印加端子４６、
４８側にかけての電圧降下も、従来例の場合よりも小さ
くなる。That is, the voltage drop from the drive voltage applying terminals 47, 49 side to the central portion generated in the peripheral electrode 45 by the currents i47b, i49b becomes smaller than that in the conventional example, and the currents i47b, i49b generate the peripheral electrodes. Drive voltage application terminal 46 from the central portion generated at 44,
The voltage drop across the 48 side is also smaller than in the case of the conventional example.

【００７７】この結果、抵抗膜５１に形成される垂直方
向の等電位線のうち、周囲電極４５、４４に近い部分の
等電位線５５Ａ、５５Ｃを周囲電極４５、４４に平行な
ものとすることができ、周囲電極４５側から周囲電極４
４側にかけて、抵抗膜５１に直線性の良好な電位分布が
発生する。As a result, of the vertical equipotential lines formed on the resistance film 51, the equipotential lines 55A and 55C near the peripheral electrodes 45 and 44 are parallel to the peripheral electrodes 45 and 44. And the surrounding electrode 4 from the surrounding electrode 45 side.
A favorable linearity potential distribution is generated in the resistance film 51 toward the 4th side.

【００７８】このように、本発明の座標入力装置の実施
の第２の形態によれば、周囲電極４２側から周囲電極４
３側にかけて、抵抗膜５１に直線性の良好な電位分布を
発生させることができると共に、周囲電極４５側から周
囲電極４４側にかけて、抵抗膜５１に直線性の良好な電
位分布を発生させることができるので、精度の高い座標
入力を行うことができる。As described above, according to the second embodiment of the coordinate input device of the present invention, the peripheral electrode 4 is arranged from the peripheral electrode 42 side.
It is possible to generate a good linearity potential distribution in the resistance film 51 toward the third side, and to generate a good linearity potential distribution in the resistance film 51 from the peripheral electrode 45 side to the peripheral electrode 44 side. Therefore, highly accurate coordinate input can be performed.

【００７９】第３の形態・・図１２〜図１５ 本発明の座標入力装置の実施の第３の形態は、座標入力
パネルとして、図１２に示す座標入力パネルを備え、そ
の他については、図１に示す本発明の座標入力装置の実
施の第１の形態と同様に構成されるものである。Third Embodiment ... FIGS. 12 to 15 In the third embodiment of the coordinate input device of the present invention, the coordinate input panel shown in FIG. 12 is provided as a coordinate input panel, and the others are shown in FIG. The coordinate input device according to the first embodiment of the present invention shown in FIG.

【００８０】図１２中、５７はガラス基板上に形成され
た抵抗膜、５８〜６１は同一形状の三角形からなる電位
分布発生用の三角形電極６２を配列してなる周囲電極部
である。In FIG. 12, reference numeral 57 is a resistance film formed on a glass substrate, and 58 to 61 are peripheral electrode portions formed by arranging triangular electrodes 62 for generating potential distribution, which are triangular in shape.

【００８１】ここに、周囲電極部５８〜６１は、抵抗膜
５７の周辺部に設けられており、三角形電極６２は、底
辺６２Ａを配列方向に平行に、かつ、隣接するもの同士
が１８０度回転させた関係になるように一定の間隙をも
って帯状に配列されている。Here, the peripheral electrode portions 58 to 61 are provided in the peripheral portion of the resistance film 57, and the triangular electrode 62 has its bottom side 62A parallel to the arrangement direction and adjacent ones are rotated by 180 degrees. They are arranged in a band shape with a certain gap so as to have the above relationship.

【００８２】また、６３〜６６は駆動電圧が印加される
駆動電圧印加用電極であり、駆動電圧印加用電極６３に
は電源電圧ＶＣＣ又は接地電圧０Ｖが印加され、駆動電
圧印加用電極６４には電源電圧ＶＣＣが印加され、駆動
電圧印加用電極６５には接地電圧０Ｖが印加され、駆動
電圧印加用電極６６には電源電圧ＶＣＣ又は接地電圧０
Ｖが印加される。Reference numerals 63 to 66 denote drive voltage applying electrodes to which a drive voltage is applied. The drive voltage applying electrode 63 is applied with the power supply voltage VCC or the ground voltage 0V, and the drive voltage applying electrode 64 is applied. The power supply voltage VCC is applied, the drive voltage application electrode 65 is applied with the ground voltage 0 V, and the drive voltage application electrode 66 is applied with the power supply voltage VCC or the ground voltage 0.
V is applied.

【００８３】本発明の座標入力装置の実施の第３の形態
においては、入力座標の検出は、駆動電圧印加用電極６
３、６４に電源電圧ＶＣＣを印加し、駆動電圧印加用電
極６５、６６に接地電圧０Ｖを印加した場合における座
標入力ペン３１の先端部３１Ａが接触している位置の抵
抗膜５７上の電圧と、駆動電圧印加用電極６４、６６に
電源電圧ＶＣＣを印加し、駆動電圧印加用電極６３、６
５に接地電圧０Ｖを印加した場合における座標入力ペン
３１の先端部３１Ａが接触している位置の抵抗膜５７上
の電圧とを検出することにより行われる。In the third embodiment of the coordinate input device of the present invention, the input coordinate is detected by the drive voltage applying electrode 6
When the power supply voltage VCC is applied to the electrodes 3 and 64 and the ground voltage 0V is applied to the drive voltage applying electrodes 65 and 66, the voltage on the resistance film 57 at the position where the tip 31A of the coordinate input pen 31 is in contact with , The drive voltage applying electrodes 64 and 66 are applied with the power supply voltage VCC, and the drive voltage applying electrodes 63 and 6 are applied.
This is performed by detecting the voltage on the resistive film 57 at the position where the tip portion 31A of the coordinate input pen 31 is in contact when the ground voltage 0V is applied to 5.

【００８４】ここに、図１３は周囲電極部５８を拡大し
て示す概略的平面図であり、抵抗膜５７のシート抵抗を
ρ0（Ω／□）、三角形電極６２の斜辺６２Ｂ、６２Ｃ
の長さをｂ、隣接する三角形電極６２、６２間の斜辺６
２Ｂ、６２Ｂ間及び斜辺６２Ｃ、６２Ｃ間の距離、即
ち、三角形電極６２、６２間の間隙ａ、三角形電極６２
の数をｎとすると、三角形電極６２の抵抗が抵抗膜５７
のシート抵抗ρ0より十分小さい場合、周囲電極部５８
の抵抗Ｒは、数１に示すようになる。FIG. 13 is an enlarged schematic plan view showing the peripheral electrode portion 58. The sheet resistance of the resistance film 57 is ρ 0 (Ω / □), and the hypotenuse sides 62B and 62C of the triangular electrode 62 are shown.
Is b, and the hypotenuse 6 between adjacent triangular electrodes 62, 62
The distance between 2B and 62B and between the hypotenuses 62C and 62C, that is, the gap a between the triangular electrodes 62 and 62, the triangular electrode 62.
Is n, the resistance of the triangular electrode 62 is the resistance film 57.
If it is sufficiently smaller than the sheet resistance ρ 0 of
The resistance R is as shown in Equation 1.

【００８５】[0085]

【数１】 [Equation 1]

【００８６】ここに、周囲電極部５８の長さをＬとし、
ｂ＞＞ａとすると、ｂは数２に示すように表わすことが
できるので、周囲電極部５８の抵抗Ｒは、数３に示すよ
うに表わすことができる。Here, the length of the peripheral electrode portion 58 is L,
If b >> a, then b can be expressed as shown in Formula 2, and thus the resistance R of the peripheral electrode portion 58 can be expressed as shown in Formula 3.

【００８７】[0087]

【数２】 (Equation 2)

【００８８】[0088]

【数３】 (Equation 3)

【００８９】即ち、三角形電極６２を小さくし、三角形
電極６２、６２間の間隙ａを小さくする場合には、三角
形電極６２、６２間の間隙ａだけで周囲電極部５８の抵
抗Ｒを決定することができ、周囲電極部５８を流れる電
流による電圧降下を小さくすることができる。周囲電極
部５９〜６１についても同様である。That is, when the triangular electrode 62 is made small and the gap a between the triangular electrodes 62, 62 is made small, the resistance R of the peripheral electrode portion 58 is determined only by the gap a between the triangular electrodes 62, 62. Therefore, the voltage drop due to the current flowing through the peripheral electrode portion 58 can be reduced. The same applies to the peripheral electrode portions 59 to 61.

【００９０】この結果、周囲電極部５８、５９に近い部
分の水平方向の等電位線を周囲電極部５８、５９に平行
なものとすることができると共に、周囲電極部６１、６
０に近い部分の垂直方向の等電位線を周囲電極部６１、
６０に平行なものとすることができる。As a result, the equipotential lines in the horizontal direction near the peripheral electrode portions 58 and 59 can be made parallel to the peripheral electrode portions 58 and 59, and the peripheral electrode portions 61 and 6 can be formed.
The vertical equipotential lines in the portion close to 0 are connected to the peripheral electrode portion 61,
It may be parallel to 60.

【００９１】したがって、本発明の座標入力装置の実施
の第３の形態によれば、周囲電極部５８側から周囲電極
部５９側にかけて、抵抗膜５７に直線性の良好な電位分
布を発生させることができると共に、周囲電極部６１側
から周囲電極部６０側にかけて、抵抗膜５７に直線性の
良好な電位分布を発生させることができるので、精度の
高い座標入力を行うことができる。Therefore, according to the third embodiment of the coordinate input device of the present invention, it is possible to generate a potential distribution with good linearity in the resistance film 57 from the peripheral electrode portion 58 side to the peripheral electrode portion 59 side. In addition, since it is possible to generate a potential distribution with good linearity in the resistance film 57 from the peripheral electrode portion 61 side to the peripheral electrode portion 60 side, highly accurate coordinate input can be performed.

【００９２】なお、図１４に、たとえば、抵抗膜５７の
水平方向の位置と、三角形電極６２、６２間の間隙ａと
の関係を示すように、周囲電極部５８〜６１において、
三角形電極６２、６２間の間隙ａを中央部にいくに従っ
て小さくなるようにする場合には、本発明の座標入力装
置の実施の第３の形態よりも周囲電極部５８〜６１にお
ける電圧降下を小さくすることができ、抵抗膜５７に、
より直線性の良い等電位線を形成することができる。Note that, for example, as shown in FIG. 14, in the peripheral electrode portions 58 to 61, the relationship between the horizontal position of the resistance film 57 and the gap a between the triangular electrodes 62, 62 is shown.
When the gap a between the triangular electrodes 62, 62 is made smaller toward the central part, the voltage drop in the peripheral electrode parts 58-61 is smaller than that in the third embodiment of the coordinate input device of the present invention. The resistance film 57 can be
It is possible to form equipotential lines having better linearity.

【００９３】また、図１５に、たとえば、抵抗膜５７の
水平方向の位置と、三角形電極６２の斜辺６２Ｂ、６２
Ｃの長さｂとの関係を示すように、周囲電極部５８〜６
１において、三角形電極６２の斜辺６２Ｂ、６２Ｃの長
さｂを中央部に行くに従って大きくなるようにする場合
には、本発明の座標入力装置の実施の第３の形態よりも
周囲電極部５８〜６１における電圧降下を小さくするこ
とができ、抵抗膜５７に、より直線性の良い等電位線を
形成することができる。Further, in FIG. 15, for example, the horizontal position of the resistance film 57 and the oblique sides 62B and 62 of the triangular electrode 62 are shown.
As shown in the relationship with the length b of C, the peripheral electrode portions 58-6
1, when the length b of the hypotenuses 62B and 62C of the triangular electrode 62 is increased toward the central portion, the peripheral electrode portions 58 to 58 are different from those of the third embodiment of the coordinate input device of the present invention. The voltage drop at 61 can be reduced, and the equipotential lines with better linearity can be formed on the resistance film 57.

【００９４】第４の形態・・図１６ 図１６は本発明の座標入力装置の実施の第４の形態の要
部を概略的に示す図である。図１６中、６８は座標入力
パネルであり、６９はガラス基板上に形成された抵抗
膜、７０〜７３は抵抗膜６９上の周囲に枠状、かつ、帯
状に一体として形成された電位分布発生用電極をなす抵
抗膜６９よりも低抵抗の周囲電極である。Fourth Embodiment FIG. 16 FIG. 16 is a view schematically showing the main part of a fourth embodiment of the coordinate input device according to the present invention. In FIG. 16, reference numeral 68 is a coordinate input panel, 69 is a resistance film formed on a glass substrate, and 70 to 73 are electric potential distributions formed integrally around the resistance film 69 in a frame shape and a belt shape. It is a peripheral electrode having a resistance lower than that of the resistance film 69 forming the working electrode.

【００９５】また、７４〜７７は駆動電圧が印加される
駆動電圧印加端子であり、駆動電圧印加端子７４には電
源電圧ＶＣＣ又は接地電圧０Ｖが印加され、駆動電圧印
加端子７５には電源電圧ＶＣＣが印加され、駆動電圧印
加端子７６には接地電圧０Ｖが印加され、駆動電圧印加
端子７７には電源電圧ＶＣＣ又は接地電圧０Ｖが印加さ
れる。Reference numerals 74 to 77 denote drive voltage applying terminals to which a drive voltage is applied. The drive voltage applying terminal 74 is applied with the power supply voltage VCC or the ground voltage 0V, and the drive voltage applying terminal 75 is applied with the power supply voltage VCC. Is applied, the ground voltage 0V is applied to the drive voltage application terminal 76, and the power supply voltage VCC or the ground voltage 0V is applied to the drive voltage application terminal 77.

【００９６】また、７８は周囲電極７０の中央部の電圧
をモニタするために周囲電極７０の中央部に設けられた
モニタ電極、７９は周囲電極７１の中央部の電圧をモニ
タするために周囲電極７１の中央部に設けられたモニタ
電極である。Reference numeral 78 is a monitor electrode provided in the central portion of the peripheral electrode 70 for monitoring the central portion voltage of the peripheral electrode 70, and 79 is a peripheral electrode for monitoring the central portion voltage of the peripheral electrode 71. 71 is a monitor electrode provided in the central portion.

【００９７】また、８０は周囲電極７２の中央部の電圧
をモニタするために周囲電極７２の中央部に設けられた
モニタ電極、８１は周囲電極７３の中央部の電圧をモニ
タするために周囲電極７３の中央部に設けられたモニタ
電極である。Reference numeral 80 denotes a monitor electrode provided at the central portion of the peripheral electrode 72 for monitoring the central portion voltage of the peripheral electrode 72, and 81 denotes a peripheral electrode for monitoring the central portion voltage of the peripheral electrode 73. This is a monitor electrode provided in the center of 73.

【００９８】また、８２は駆動電圧印加端子７４、７７
に電源電圧ＶＣＣ又は接地電圧０Ｖを印加するためのス
イッチ回路であり、このスイッチ回路８２は、駆動電圧
印加端子７４に電源電圧ＶＣＣを印加する場合には、駆
動電圧印加端子７７に接地電圧０Ｖを印加し、駆動電圧
印加端子７４に接地電圧０Ｖを印加する場合には、駆動
電圧印加端子７７に電源電圧ＶＣＣを印加するように制
御される。Reference numeral 82 is a drive voltage application terminal 74, 77.
Is a switch circuit for applying the power supply voltage VCC or the ground voltage 0 V to the drive voltage application terminal 74. When the power supply voltage VCC is applied to the drive voltage application terminal 74, the switch circuit 82 applies the ground voltage 0 V to the drive voltage application terminal 77. When applying and applying the ground voltage 0V to the drive voltage application terminal 74, the power supply voltage VCC is controlled to be applied to the drive voltage application terminal 77.

【００９９】また、８３は先端部８３Ａを抵抗膜６９に
接触させることにより座標入力を行う座標入力ペン、８
４は座標入力ペン８３の先端部８３Ａが接触した抵抗膜
６９上の座標を検出する入力座標検出回路であり、８５
はモニタ電極７８〜８１を介して周囲電極７０〜７３の
中央部の電圧を検出する電圧検出回路である。Reference numeral 83 is a coordinate input pen for inputting coordinates by bringing the tip portion 83A into contact with the resistance film 69.
Reference numeral 4 denotes an input coordinate detection circuit for detecting the coordinates on the resistance film 69 with which the tip portion 83A of the coordinate input pen 83 contacts.
Is a voltage detection circuit for detecting the voltage of the central portion of the peripheral electrodes 70 to 73 via the monitor electrodes 78 to 81.

【０１００】ここに、入力座標検出回路８４は、スイッ
チ制御信号によりスイッチ回路８２を制御すると共に、
座標入力ペン８３の先端部８３Ａが接触した抵抗膜６９
上の電圧と、電圧検出回路８５で検出される周囲電極７
０〜７３の中央部の電圧とから、電位分布の非直線性を
考慮し、座標入力ペン８３の先端部８３Ａが実際に接触
した抵抗膜６９上の座標を検出するように構成されてい
る。Here, the input coordinate detection circuit 84 controls the switch circuit 82 by the switch control signal, and
The resistance film 69 with which the tip portion 83A of the coordinate input pen 83 contacts
The upper electrode and the surrounding electrode 7 detected by the voltage detection circuit 85
It is configured to detect the coordinates on the resistance film 69 that the tip portion 83A of the coordinate input pen 83 actually contacts from the voltage of the central portion of 0 to 73 in consideration of the non-linearity of the potential distribution.

【０１０１】本発明の座標入力装置の実施の第４の形態
においては、入力座標の検出は、駆動電圧印加端子７
４、７５に電源電圧ＶＣＣを印加し、駆動電圧印加端子
７６、７７に接地電圧０Ｖを印加した場合における座標
入力ペン８３の先端部８３Ａが接触している位置の抵抗
膜６９上の電圧と、駆動電圧印加端子７５、７７に電源
電圧ＶＣＣを印加し、駆動電圧印加端子７４、７６に接
地電圧０Ｖを印加した場合における座標入力ペン８３の
先端部８３Ａが接触している位置の抵抗膜６９上の電圧
とを検出することにより行われる。In the fourth embodiment of the coordinate input device of the present invention, the input coordinate is detected by the drive voltage applying terminal 7
The voltage on the resistance film 69 at the position where the tip portion 83A of the coordinate input pen 83 is in contact when the power supply voltage VCC is applied to the terminals 4 and 75 and the ground voltage 0V is applied to the drive voltage application terminals 76 and 77, When the power supply voltage VCC is applied to the drive voltage application terminals 75 and 77 and the ground voltage 0V is applied to the drive voltage application terminals 74 and 76, the tip end 83A of the coordinate input pen 83 is in contact with the resistive film 69. Is detected by detecting the voltage.

【０１０２】ここに、入力座標検出回路８４において
は、座標入力ペン８３の先端部８３Ａが接触した抵抗膜
６９上の電圧と、電圧検出回路８５で検出される周囲電
極７０〜７３の中央部の電圧とから、電位分布の非直線
性を考慮し、座標入力ペン８３の先端部８３Ａが実際に
接触した抵抗膜６９上の座標が検出される。Here, in the input coordinate detecting circuit 84, the voltage on the resistive film 69 with which the tip portion 83A of the coordinate input pen 83 comes into contact and the central portion of the peripheral electrodes 70 to 73 detected by the voltage detecting circuit 85. The coordinates on the resistance film 69 with which the tip portion 83A of the coordinate input pen 83 actually contacts are detected from the voltage in consideration of the nonlinearity of the potential distribution.

【０１０３】したがって、本発明の座標入力装置の実施
の第４の形態によれば、抵抗膜６９に生じる電位分布に
直線性がない場合であっても、精度の高い座標入力を行
うことができる。Therefore, according to the fourth embodiment of the coordinate input device of the present invention, highly accurate coordinate input can be performed even when the potential distribution generated in the resistance film 69 has no linearity. .

【０１０４】第５の形態・・図１７ 図１７は本発明の座標入力装置の実施の第５の形態の要
部を概略的に示す図であり、本発明の座標入力装置の実
施の第５の形態は、図１６に示すようなモニタ電極７８
〜８１を形成せず、駆動電圧印加端子７４〜７７の電圧
をモニタし、入力座標検出回路８４において、座標入力
ペン８３の先端部８３Ａが接触した抵抗膜６９上の電圧
と、電圧検出回路８５で検出される駆動電圧印加端子７
４〜７７の電圧とから、電位分布の非直線性を考慮し、
座標入力ペン８３の先端部８３Ａが実際に接触した抵抗
膜６９上の座標を検出するように構成されており、その
他については、図１６に示す本発明の座標入力装置の実
施の第４の形態と同様に構成されている。Fifth Embodiment FIG. 17 FIG. 17 is a diagram schematically showing a main part of a fifth embodiment of the coordinate input device of the present invention, which is a fifth embodiment of the coordinate input device of the present invention. The form of the monitor electrode 78 is as shown in FIG.
~ 81 is not formed, the voltage of the drive voltage application terminals 74 to 77 is monitored, and in the input coordinate detection circuit 84, the voltage on the resistance film 69 with which the tip portion 83A of the coordinate input pen 83 is in contact, and the voltage detection circuit 85. Drive voltage application terminal 7 detected by
Considering the non-linearity of the potential distribution from the voltage of 4 to 77,
The coordinate input pen 83 is configured so as to detect the coordinates on the resistance film 69 that the tip portion 83A of the coordinate input pen 83 actually touches. For other points, the fourth embodiment of the coordinate input device of the present invention shown in FIG. Is configured similarly to.

【０１０５】本発明の座標入力装置の実施の第５の形態
においても、入力座標の検出は、駆動電圧印加端子７
４、７５に電源電圧ＶＣＣを印加し、駆動電圧印加端子
７６、７７に接地電圧０Ｖを印加した場合における座標
入力ペン８３の先端部８３Ａが接触している位置の抵抗
膜６９上の電圧と、駆動電圧印加端子７５、７７に電源
電圧ＶＣＣを印加し、駆動電圧印加端子７４、７６に接
地電圧０Ｖを印加した場合における座標入力ペン８３の
先端部８３Ａが接触している位置の抵抗膜６９上の電圧
とを検出することにより行われる。Also in the fifth embodiment of the coordinate input device of the present invention, the input voltage is detected by the drive voltage applying terminal 7
The voltage on the resistance film 69 at the position where the tip portion 83A of the coordinate input pen 83 is in contact when the power supply voltage VCC is applied to the terminals 4 and 75 and the ground voltage 0V is applied to the drive voltage application terminals 76 and 77, When the power supply voltage VCC is applied to the drive voltage application terminals 75 and 77 and the ground voltage 0V is applied to the drive voltage application terminals 74 and 76, the tip end 83A of the coordinate input pen 83 is in contact with the resistive film 69. Is detected by detecting the voltage.

【０１０６】ここに、入力座標検出回路８４において
は、座標入力ペン８３の先端部８３Ａが接触した抵抗膜
６９上の電圧と、電圧検出回路８５で検出される駆動電
圧印加端子７４〜７７の電圧とから、電位分布の非直線
性を考慮し、座標入力ペン８３の先端部８３Ａが実際に
接触した抵抗膜６９上の座標が検出される。Here, in the input coordinate detecting circuit 84, the voltage on the resistive film 69 with which the tip portion 83A of the coordinate input pen 83 contacts and the voltage of the drive voltage applying terminals 74 to 77 detected by the voltage detecting circuit 85. From this, the coordinates on the resistance film 69 with which the tip portion 83A of the coordinate input pen 83 actually contacts are detected in consideration of the non-linearity of the potential distribution.

【０１０７】したがって、本発明の座標入力装置の実施
の第５の形態によっても、本発明の座標入力装置の実施
の第４の形態と同様に、抵抗膜６９に生じる電位分布に
直線性がない場合であっても、精度の高い座標入力を行
うことができる。Therefore, according to the fifth embodiment of the coordinate input device of the present invention, as in the fourth embodiment of the coordinate input device of the present invention, the potential distribution generated in the resistance film 69 has no linearity. Even in this case, highly accurate coordinate input can be performed.

【０１０８】第６の形態・・図１８ 本発明の座標入力装置の実施の第６の形態は、座標入力
パネルとして、図１８に示す座標入力パネルを備え、そ
の他については、図１６に示す本発明の座標入力装置の
実施の第４の形態と同様に構成されるものである。Sixth Embodiment ... FIG. 18 The sixth embodiment of the coordinate input device of the present invention is provided with the coordinate input panel shown in FIG. 18 as a coordinate input panel, and the others shown in FIG. The coordinate input device of the invention has the same configuration as that of the fourth embodiment.

【０１０９】この座標入力パネルは、図１６に示すモニ
タ電極７８、７９、８０、８１の代わりに、平面形状を
Ｔ字状とし、かつ、先端部８６Ａ、８７Ａ、８８Ａ、８
９Ａを抵抗膜６９上に突出させ、かつ、抵抗膜６９に接
触させた周囲電極７０〜７３よりも低抵抗のモニタ電極
８６、８７、８８、８９を設け、その他については、図
１６に示す座標入力パネル６８と同様に構成したもので
ある。This coordinate input panel has a T-shaped planar shape in place of the monitor electrodes 78, 79, 80, 81 shown in FIG. 16 and has tip portions 86A, 87A, 88A, 8A.
9A is projected on the resistance film 69, and monitor electrodes 86, 87, 88, 89 having a resistance lower than that of the peripheral electrodes 70 to 73 in contact with the resistance film 69 are provided, and the other coordinates are shown in FIG. The input panel 68 has the same configuration.

【０１１０】本発明の座標入力装置の実施の第６の形態
においても、入力座標の検出は、駆動電圧印加端子７
４、７５に電源電圧ＶＣＣを印加し、駆動電圧印加端子
７６、７７に接地電圧０Ｖを印加した場合における座標
入力ペン８３の先端部８３Ａが接触している位置の抵抗
膜６９上の電圧と、駆動電圧印加端子７５、７７に電源
電圧ＶＣＣを印加し、駆動電圧印加端子７４、７６に接
地電圧０Ｖを印加した場合における座標入力ペン８３の
先端部８３Ａが接触している位置の抵抗膜６９上の電圧
とを検出することにより行われる。Also in the sixth embodiment of the coordinate input device of the present invention, the input voltage is detected by the drive voltage applying terminal 7
The voltage on the resistance film 69 at the position where the tip portion 83A of the coordinate input pen 83 is in contact when the power supply voltage VCC is applied to the terminals 4 and 75 and the ground voltage 0V is applied to the drive voltage application terminals 76 and 77, When the power supply voltage VCC is applied to the drive voltage application terminals 75 and 77 and the ground voltage 0V is applied to the drive voltage application terminals 74 and 76, the tip end 83A of the coordinate input pen 83 is in contact with the resistive film 69. Is detected by detecting the voltage.

【０１１１】ここに、９０Ａ、９０Ｂ、９０Ｃは、駆動
電圧印加端子７４、７５に電源電圧ＶＣＣを印加し、駆
動電圧印加端子７６、７７に接地電圧０Ｖを印加した場
合に発生する水平方向の等電位線の一部を示している。Here, 90A, 90B and 90C are horizontal lines which are generated when the power supply voltage VCC is applied to the drive voltage application terminals 74 and 75 and the ground voltage 0V is applied to the drive voltage application terminals 76 and 77. A part of the potential line is shown.

【０１１２】このように、本発明の座標入力装置の実施
の第６の形態においては、周囲電極７０、７１よりも低
抵抗のモニタ電極８６、８７の先端部８６Ａ、８７Ａを
抵抗膜６９上に突出させ、かつ、抵抗膜６９に接触させ
ているので、周囲電極７０、７１の近くに形成される水
平方向の等電位線９０Ａ、９０Ｃの湾曲を緩和すること
ができる。As described above, in the sixth embodiment of the coordinate input device of the present invention, the tip portions 86A and 87A of the monitor electrodes 86 and 87 having lower resistance than the peripheral electrodes 70 and 71 are placed on the resistance film 69. Since it is projected and brought into contact with the resistance film 69, the curvature of the horizontal equipotential lines 90A and 90C formed near the peripheral electrodes 70 and 71 can be alleviated.

【０１１３】また、周囲電極７２、７３よりも低抵抗の
モニタ電極８８、８９の先端部８８Ａ、８９Ａを抵抗膜
６９上に突出させ、かつ、抵抗膜６９に接触させている
ので、駆動電圧印加端子７５、７７に電源電圧ＶＣＣを
印加し、駆動電圧印加端子７４、７６に接地電圧０Ｖを
印加した場合に、周囲電極７２、７３の近くに発生する
垂直方向の等電位線の湾曲を緩和することができる。Further, since the tip portions 88A and 89A of the monitor electrodes 88 and 89 having a resistance lower than that of the peripheral electrodes 72 and 73 are projected onto the resistance film 69 and are in contact with the resistance film 69, the drive voltage is applied. When the power supply voltage VCC is applied to the terminals 75 and 77 and the ground voltage 0V is applied to the drive voltage application terminals 74 and 76, the bending of the vertical equipotential lines generated near the peripheral electrodes 72 and 73 is alleviated. be able to.

【０１１４】そして、また、本発明の座標入力装置の実
施の第６の形態によっても、入力座標検出回路８４にお
いては、座標入力ペン８３の先端部８３Ａが接触した抵
抗膜６９上の電圧と、電圧検出回路８５で検出される周
囲電極７０〜７３の中央部の電圧とから、電位分布の非
直線性を考慮し、座標入力ペン８３の先端部８３Ａが実
際に接触した抵抗膜６９上の座標が検出される。Also, according to the sixth embodiment of the coordinate input device of the present invention, in the input coordinate detection circuit 84, the voltage on the resistance film 69 with which the tip portion 83A of the coordinate input pen 83 contacts, Coordinates on the resistance film 69 with which the tip portion 83A of the coordinate input pen 83 actually contacts from the voltage of the central portion of the peripheral electrodes 70 to 73 detected by the voltage detection circuit 85 in consideration of the non-linearity of the potential distribution. Is detected.

【０１１５】したがって、本発明の座標入力装置の実施
の第６の形態によっても、本発明の座標入力装置の実施
の第４の形態と同様に、抵抗膜６９に生じる電位分布に
直線性がない場合であっても、精度の高い座標入力を行
うことができる。Therefore, according to the sixth embodiment of the coordinate input device of the present invention, as in the fourth embodiment of the coordinate input device of the present invention, the potential distribution generated in the resistance film 69 has no linearity. Even in this case, highly accurate coordinate input can be performed.

【０１１６】第７の形態・・図１９、図２０ 図１９は本発明の座標入力装置の実施の第７の形態の要
部を概略的に示す図であり、本発明の座標入力装置の実
施の第７の形態においては、入力座標検出回路として、
モニタ電極７８〜８１によりモニタされる電圧を検出す
る電圧検出回路を有しない図１に示す入力座標検出回路
３２が設けられていると共に、モニタ電極７８〜８１
は、それぞれ、電圧検出・駆動電圧発生回路９１〜９４
に接続されており、その他については、図１６に示す本
発明の座標入力装置の実施の第４の形態と同様に構成さ
れている。Seventh Embodiment FIG. 19 and FIG. 20 FIG. 19 is a diagram schematically showing a main part of a seventh embodiment of the coordinate input device of the present invention. In the seventh form of, as the input coordinate detection circuit,
The input coordinate detection circuit 32 shown in FIG. 1 having no voltage detection circuit for detecting the voltage monitored by the monitor electrodes 78 to 81 is provided, and the monitor electrodes 78 to 81 are provided.
Are voltage detection / drive voltage generation circuits 91 to 94, respectively.
The other parts of the configuration are similar to those of the fourth embodiment of the coordinate input device of the present invention shown in FIG.

【０１１７】ここに、電圧検出・駆動電圧発生回路９１
〜９４は、モニタ電極７８〜８１によりモニタされる電
圧を検出して、電位分布の非直線性を判定して、電位分
布を直線性の良好なものとするための駆動電圧をモニタ
電極７８〜８１に印加するものである。Here, the voltage detecting / driving voltage generating circuit 91
Reference numerals 94 to 94 detect the voltages monitored by the monitor electrodes 78 to 81 to determine the non-linearity of the potential distribution, and the drive voltages for making the potential distribution have good linearity. It is applied to 81.

【０１１８】これら電圧検出・駆動電圧発生回路９１〜
９４は同一の回路構成とされており、図２０は電圧検出
・駆動電圧発生回路９１の構成を示しており、９６はモ
ニタ電極７８によりモニタされる周囲電極７０の中央部
の電圧を検出する電圧検出回路、９７は電圧検出回路９
６により検出された電圧に基づいて、抵抗膜６９の電位
分布を直線性の良好なものとするために、モニタ電極７
８に印加すべき駆動電圧を示す電圧情報を出力する演算
回路、９８は演算回路９７から出力される電圧情報に基
づいてモニタ電極７８に印加すべき駆動電圧を出力する
駆動電圧発生回路である。These voltage detection / drive voltage generation circuits 91 to 91
20. FIG. 20 shows the configuration of the voltage detection / drive voltage generation circuit 91, and 96 is the voltage for detecting the voltage of the central portion of the peripheral electrode 70 monitored by the monitor electrode 78. Detection circuit, 97 is a voltage detection circuit 9
In order to make the potential distribution of the resistance film 69 have good linearity based on the voltage detected by the monitor electrode 7,
Reference numeral 8 denotes an arithmetic circuit that outputs voltage information indicating the drive voltage to be applied to 8, and 98 is a drive voltage generation circuit that outputs the drive voltage to be applied to the monitor electrode 78 based on the voltage information output from the arithmetic circuit 97.

【０１１９】本発明の座標入力装置の実施の第７の形態
においては、入力座標の検出は、駆動電圧印加端子７
４、７５に電源電圧ＶＣＣを印加し、駆動電圧印加端子
７６、７７に接地電圧０Ｖを印加した場合における座標
入力ペン８３の先端部８３Ａが接触している位置の抵抗
膜６９上の電圧と、駆動電圧印加端子７５、７７に電源
電圧ＶＣＣを印加し、駆動電圧印加端子７４、７６に接
地電圧０Ｖを印加した場合における座標入力ペン８３の
先端部８３Ａが接触している位置の抵抗膜６９上の電圧
とを検出することにより行われる。In the seventh embodiment of the coordinate input device of the present invention, the input coordinate is detected by the drive voltage applying terminal 7
The voltage on the resistance film 69 at the position where the tip portion 83A of the coordinate input pen 83 is in contact when the power supply voltage VCC is applied to the terminals 4 and 75 and the ground voltage 0V is applied to the drive voltage application terminals 76 and 77, When the power supply voltage VCC is applied to the drive voltage application terminals 75 and 77 and the ground voltage 0V is applied to the drive voltage application terminals 74 and 76, the tip end 83A of the coordinate input pen 83 is in contact with the resistive film 69. Is detected by detecting the voltage.

【０１２０】ここに、電圧検出・駆動電圧発生回路９１
〜９４は、モニタ電極７８〜８１によりモニタされる周
囲電極７０〜７３の中央部の電圧に基づいて、抵抗膜６
９の電位分布を直線性の良好なものとするための駆動電
圧をモニタ電極７８〜８１に印加する。Here, the voltage detecting / driving voltage generating circuit 91
To 94 are resistance films 6 based on the voltages of the central portions of the peripheral electrodes 70 to 73 monitored by the monitor electrodes 78 to 81.
A drive voltage is applied to the monitor electrodes 78 to 81 to make the potential distribution of 9 have good linearity.

【０１２１】したがって、本発明の座標入力装置の実施
の第７の形態によれば、抵抗膜６９に直線性の良好な電
位分布を発生させることができ、精度の高い座標入力を
行うことができる。Therefore, according to the seventh embodiment of the coordinate input device of the present invention, a potential distribution having good linearity can be generated in the resistance film 69, and highly accurate coordinate input can be performed. .

【０１２２】なお、座標入力パネル６８の代わりに、図
１８に示す座標入力パネルを使用するようにしても良
い。Instead of the coordinate input panel 68, the coordinate input panel shown in FIG. 18 may be used.

【０１２３】第８の形態・・図２１ 図２１は本発明の座標入力装置の実施の第８の形態の要
部を概略的に示す図である。図２１中、１００は座標入
力パネルであり、この座標入力パネル１００は、図１６
に示す座標入力パネル６８と、この座標入力パネル上に
一定の間隔を有するように設けられた電圧検出用導電膜
１０２とで構成されている。Eighth Mode ... FIG. 21 FIG. 21 is a view schematically showing a main part of an eighth mode for carrying out the coordinate input device of the invention. In FIG. 21, reference numeral 100 denotes a coordinate input panel, which is shown in FIG.
The coordinate input panel 68 and the voltage detecting conductive film 102 provided on the coordinate input panel with a constant interval.

【０１２４】また、１０３は座標入力ペンであり、この
座標入力ペン１０３は、座標入力時、その先端部１０３
Ａで電圧検出用導電膜１０２の入力座標に対応する位置
を加圧して、電圧検出用導電膜１０２の入力座標に対応
する位置の抵抗膜６９との対向部分を抵抗膜６９に接触
させるように使用される。Further, 103 is a coordinate input pen, and this coordinate input pen 103 has its tip 103 at the time of coordinate input.
A is used to pressurize the position corresponding to the input coordinates of the voltage detection conductive film 102 so that the portion facing the resistance film 69 at the position corresponding to the input coordinates of the voltage detection conductive film 102 is brought into contact with the resistance film 69. used.

【０１２５】また、１０４は座標入力パネル６８の駆動
電圧印加端子７４〜７７に駆動電圧を印加するスイッチ
回路であり、このスイッチ回路１０４は、電圧検出用導
電膜１０２が抵抗膜に接触する前は、駆動電圧印加端子
７４〜７７に接地電圧０Ｖを印加し、電圧検出用導電膜
１０２が抵抗膜に接触すると、駆動電圧印加端子７４に
電源電圧ＶＣＣ及び接地電圧０Ｖを交互に印加し、駆動
電圧印加端子７５に電源電圧ＶＣＣを印加し、駆動電圧
印加端子７６に接地電圧０Ｖを印加し、駆動電圧印加端
子７７に接地電圧０Ｖ及び電源電圧ＶＣＣを交互に印加
するように制御される。Further, 104 is a switch circuit for applying a drive voltage to the drive voltage applying terminals 74 to 77 of the coordinate input panel 68. This switch circuit 104 is provided before the voltage detecting conductive film 102 comes into contact with the resistance film. When the ground voltage 0V is applied to the drive voltage application terminals 74 to 77 and the voltage detection conductive film 102 contacts the resistance film, the power supply voltage VCC and the ground voltage 0V are alternately applied to the drive voltage application terminal 74 to drive the drive voltage. The power supply voltage VCC is applied to the application terminal 75, the ground voltage 0V is applied to the drive voltage application terminal 76, and the ground voltage 0V and the power supply voltage VCC are alternately applied to the drive voltage application terminal 77.

【０１２６】また、１０５は電圧検出用導電膜１０２に
接続された配線、１０６は座標入力ペン１０３により入
力された座標の検出を行う入力座標検出回路である。Further, 105 is a wiring connected to the voltage detecting conductive film 102, and 106 is an input coordinate detecting circuit for detecting the coordinates input by the coordinate input pen 103.

【０１２７】この入力座標検出回路１０６において、１
０７は電流が流れるか否かを検出することにより、電圧
検出用導電膜１０２が抵抗膜６９に接触したか否かを検
出する電圧検出用導電膜接触検出手段をなすタッチ検出
回路であり、１０８は比較器、１０９はリファレンス
（基準）電源、１１０、１１１は抵抗、１１２は接続ス
イッチ素子である。In the input coordinate detection circuit 106, 1
Reference numeral 07 denotes a touch detection circuit which forms a voltage detection conductive film contact detection unit which detects whether or not the voltage detection conductive film 102 contacts the resistance film 69 by detecting whether or not a current flows. Is a comparator, 109 is a reference power source, 110 and 111 are resistors, and 112 is a connection switch element.

【０１２８】また、１１３は電圧検出用導電膜１０２を
介して検出される抵抗膜６９上の電圧をデジタル信号に
変換するＡ／Ｄコンバータ（アナログ・デジタル・コン
バータ）、１１４はスイッチ制御信号ＳＡによるスイッ
チ回路１０４の制御、スイッチ制御信号ＳＢによる接続
スイッチ素子１１２の制御及びＡ／Ｄコンバータ１１３
の出力から入力座標の検出等を行うＭＣＵ（マイクロ・
コントローラ・ユニット）である。Further, 113 is an A / D converter (analog-digital converter) for converting the voltage on the resistance film 69 detected through the voltage detecting conductive film 102 into a digital signal, and 114 is a switch control signal SA. Control of switch circuit 104, control of connection switch element 112 by switch control signal SB, and A / D converter 113
The MCU (micro.
Controller unit).

【０１２９】ここに、本発明の座標入力装置の実施の第
８の形態においては、電圧検出用導電膜１０２が抵抗膜
６９に接触する前は、スイッチ回路１０４により駆動電
圧印加端子７４〜７７に接地電圧０Ｖが印加されると共
に、接続スイッチ素子１１２は導通状態とされる。Here, in the eighth embodiment of the coordinate input device of the present invention, before the voltage detecting conductive film 102 contacts the resistance film 69, the switch circuit 104 causes the drive voltage applying terminals 74 to 77 to operate. The ground voltage 0V is applied and the connection switch element 112 is turned on.

【０１３０】そして、座標入力ペン１０３の先端部１０
３Ａが電圧検出用導電膜１０２を加圧して、電圧検出用
導電膜１０２の加圧点が抵抗膜６９に接触すると、ＶＣ
Ｃ電源から抵抗１１０、接続スイッチ素子１１２、抵抗
１１１、電圧検出用導電膜１０２、抵抗膜６９及び駆動
電圧印加端子７４〜７７を介して接地側に電流が流れ、
抵抗１１１間に電位差が生じ、これが比較器１０８によ
り検出され、この比較器１０８からＭＣＵ１１４に対し
て、電圧検出用導電膜１０２が抵抗膜６９に接触した旨
の情報が与えられる。Then, the tip portion 10 of the coordinate input pen 103
When 3A presses the voltage detecting conductive film 102 and the pressing point of the voltage detecting conductive film 102 contacts the resistance film 69, VC
A current flows from the C power source to the ground side through the resistor 110, the connection switch element 112, the resistor 111, the voltage detection conductive film 102, the resistance film 69, and the drive voltage application terminals 74 to 77,
A potential difference is generated between the resistors 111, which is detected by the comparator 108, and the comparator 108 provides the MCU 114 with information that the voltage detection conductive film 102 is in contact with the resistance film 69.

【０１３１】すると、ＭＣＵ１１４は、接続スイッチ素
子１１２を非導通状態にすると共に、スイッチ回路１０
４を制御して、駆動電圧印加端子７４に電源電圧ＶＣＣ
及び接地電圧０Ｖを交互に印加させ、駆動電圧印加端子
７５に電源電圧ＶＣＣを印加させ、駆動電圧印加端子７
６に接地電圧０Ｖを印加させ、駆動電圧印加端子７７に
接地電圧０Ｖ及び電源電圧ＶＣＣを交互に印加させる。Then, the MCU 114 brings the connection switch element 112 into a non-conducting state and the switch circuit 10
4 to control the drive voltage applying terminal 74 to the power supply voltage VCC.
And the ground voltage 0V are applied alternately, the power supply voltage VCC is applied to the drive voltage application terminal 75, and the drive voltage application terminal 7
6 is applied with the ground voltage 0V, and the drive voltage application terminal 77 is alternately applied with the ground voltage 0V and the power supply voltage VCC.

【０１３２】この結果、電圧検出用導電膜１０２が接触
している位置の抵抗膜６９上の電圧がＡ／Ｄコンバータ
１１３に入力され、Ａ／Ｄコンバータ１１３は、これを
デジタル化してＭＣＵ１１４に与え、ＭＣＵ１１４は、
入力されたデジタル化された抵抗膜６９上の電圧に基づ
いて入力座標を検出する。As a result, the voltage on the resistance film 69 at the position where the voltage detecting conductive film 102 is in contact is input to the A / D converter 113, and the A / D converter 113 digitizes it and gives it to the MCU 114. , The MCU 114
The input coordinates are detected based on the digitized voltage on the resistance film 69.

【０１３３】このように、本発明の座標入力装置の実施
の第８の形態によれば、電圧検出用導電膜１０２が抵抗
膜６９に接触したか否かの検出は、抵抗１１１に電圧降
下が発生するか否か、即ち、抵抗１１１に電流が流れる
か否かにより検出するとしているので、接触抵抗が変化
する場合においても、電圧検出用導電膜１０２が抵抗膜
６９に接触したか否かの検出を確実に行うことができ、
入力座標の検出を確実に行うことができる。As described above, according to the eighth embodiment of the coordinate input device of the present invention, whether or not the voltage detecting conductive film 102 is in contact with the resistance film 69 is detected by detecting the voltage drop in the resistor 111. It is assumed that the detection is performed depending on whether or not it occurs, that is, whether or not a current flows through the resistor 111. Therefore, even when the contact resistance changes, whether or not the voltage detection conductive film 102 contacts the resistance film 69. Can be detected reliably,
The input coordinates can be reliably detected.

【０１３４】なお、本発明の座標入力装置の実施の第８
の形態においては、座標入力パネルとして、図１６に示
す座標入力パネル６８を使用した場合について説明した
が、この代わりに、図１及び図２に示す座標入力パネル
２０や、図７に示す座標入力パネルや、図１２に示す座
標入力パネルや、図１８に示す座標入力パネル等を使用
することができるものである。The eighth embodiment of the coordinate input device of the present invention is as follows.
In the above embodiment, the coordinate input panel 68 shown in FIG. 16 is used as the coordinate input panel, but instead of this, the coordinate input panel 20 shown in FIGS. 1 and 2 and the coordinate input panel shown in FIG. 7 are used. The panel, the coordinate input panel shown in FIG. 12, the coordinate input panel shown in FIG. 18, or the like can be used.

【０１３５】第９の形態・・図２２ 図２２は本発明の座標入力装置の実施の第９の形態の要
部を概略的に示す図であり、本発明の座標入力装置の実
施の第９の形態は、図２１に示す入力座標検出回路１０
６と回路構成の異なる入力座標検出回路１１６を設け、
その他については、図２１に示す本発明の座標入力装置
の実施の第８の形態と同様に構成したものである。22. Ninth Embodiment FIG. 22 is a diagram schematically showing a main part of a ninth embodiment of the coordinate input device according to the present invention. A ninth embodiment of the coordinate input device according to the present invention will be described. The form of the input coordinate detection circuit 10 shown in FIG.
6, an input coordinate detection circuit 116 having a circuit configuration different from that of 6,
Others are the same as those of the eighth embodiment of the coordinate input device of the present invention shown in FIG.

【０１３６】ここに、入力座標検出回路１１６は、図２
１に示すタッチ検出回路１０７と回路構成の異なるタッ
チ検出回路１１７を設け、その他については、図２１に
示す入力座標検出回路１０６と同様に構成したものであ
る。Here, the input coordinate detection circuit 116 is shown in FIG.
A touch detection circuit 117 having a circuit configuration different from that of the touch detection circuit 107 shown in FIG. 1 is provided, and other configurations are similar to those of the input coordinate detection circuit 106 shown in FIG.

【０１３７】タッチ検出回路１１７において、１１８、
１１９は抵抗、１２０はＭＣＵ１１４からのスイッチ制
御信号ＳＢにより導通、非導通が制御される接続スイッ
チ素子をなすＰＮＰトランジスタ、１２１は抵抗１１８
の電位差を検出するＰＮＰトランジスタである。In the touch detection circuit 117, 118,
Reference numeral 119 is a resistor, 120 is a PNP transistor forming a connection switch element whose conduction and non-conduction are controlled by a switch control signal SB from the MCU 114, and 121 is a resistor 118.
It is a PNP transistor that detects the potential difference of.

【０１３８】本発明の座標入力装置の実施の第９の形態
においては、電圧検出用導電膜１０２が抵抗膜６９に接
触する前は、スイッチ回路１０４により駆動電圧印加端
子７４〜７６に接地電圧０Ｖが印加されると共に、ＰＮ
Ｐトランジスタ１２０は導通状態とされる。In the ninth embodiment of the coordinate input device of the present invention, before the voltage detecting conductive film 102 contacts the resistance film 69, the switch circuit 104 causes the drive voltage applying terminals 74 to 76 to have the ground voltage of 0V. Is applied and PN
P transistor 120 is rendered conductive.

【０１３９】そして、座標入力ペン１０３の先端部１０
３Ａが電圧検出用導電膜１０２を加圧して、電圧検出用
導電膜１０２の加圧点が抵抗膜６９に接触すると、ＶＣ
Ｃ電源からＰＮＰトランジスタ１２０、抵抗１１８、電
圧検出用導電膜１０２、抵抗膜６９及び駆動電圧印加端
子７４〜７７を介して接地側に電流が流れ、抵抗１１８
間に電位差が生じ、ＰＮＰトランジスタ１２１により検
出され、このＰＮＰトランジスタ１２１からＭＣＵ１１
４に対して、電圧検出用導電膜１０２が抵抗膜６９に接
触した旨の情報が与えられる。Then, the tip portion 10 of the coordinate input pen 103
When 3A presses the voltage detecting conductive film 102 and the pressing point of the voltage detecting conductive film 102 contacts the resistance film 69, VC
A current flows from the C power source to the ground side through the PNP transistor 120, the resistor 118, the voltage detecting conductive film 102, the resistor film 69, and the drive voltage applying terminals 74 to 77, and the resistor 118 is connected.
A potential difference is generated between them, which is detected by the PNP transistor 121.
The information indicating that the voltage detecting conductive film 102 is in contact with the resistance film 69 is given to No. 4.

【０１４０】すると、ＭＣＵ１１４は、ＰＮＰトランジ
スタ１２０を非導通状態とすると共に、スイッチ制御信
号ＳＡによりスイッチ回路１０４を制御して、駆動電圧
印加端子７４に電源電圧ＶＣＣ及び接地電圧０Ｖを交互
に印加させ、駆動電圧印加端子７５に電源電圧ＶＣＣを
印加させ、駆動電圧印加端子７６に接地電圧０Ｖを印加
させ、駆動電圧印加端子７７に接地電圧０Ｖ及び電源電
圧ＶＣＣを交互に印加させる。Then, the MCU 114 makes the PNP transistor 120 non-conductive and controls the switch circuit 104 by the switch control signal SA to alternately apply the power supply voltage VCC and the ground voltage 0V to the drive voltage application terminal 74. The drive voltage applying terminal 75 is applied with the power supply voltage VCC, the drive voltage applying terminal 76 is applied with the ground voltage 0V, and the drive voltage applying terminal 77 is applied with the ground voltage 0V and the power supply voltage VCC alternately.

【０１４１】この結果、電圧検出用導電膜１０２が接触
している位置の抵抗膜６９上の電圧がＡ／Ｄコンバータ
１１３に入力され、Ａ／Ｄコンバータ１１３は、これを
デジタル化してＭＣＵ１１４に与え、ＭＣＵ１１４は、
入力されたデジタル化された抵抗膜６９上の電圧に基づ
いて入力座標を検出する。As a result, the voltage on the resistance film 69 at the position in contact with the voltage detection conductive film 102 is input to the A / D converter 113, which digitizes it and supplies it to the MCU 114. , The MCU 114
The input coordinates are detected based on the digitized voltage on the resistance film 69.

【０１４２】このように、本発明の座標入力装置の実施
の第９の形態によれば、電圧検出用導電膜１０２が抵抗
膜６９に接触したか否かの検出は、抵抗１１８に電圧降
下が発生するか否か、即ち、抵抗１１８に電流が流れる
か否かにより検出するとしているので、接触抵抗が変化
する場合においても、電圧検出用導電膜１０２が抵抗膜
６９に接触したか否かの検出を確実に行うことができ、
入力座標の検出を確実に行うことができる。As described above, according to the ninth embodiment of the coordinate input device of the present invention, whether or not the voltage detecting conductive film 102 is in contact with the resistance film 69 is detected by the voltage drop across the resistor 118. The detection is performed depending on whether or not it occurs, that is, whether or not a current flows through the resistor 118. Therefore, even if the contact resistance changes, whether or not the voltage detection conductive film 102 contacts the resistance film 69. Can be detected reliably,
The input coordinates can be reliably detected.

【０１４３】なお、本発明の座標入力装置の実施の第９
の形態においては、座標入力パネルとして、図１６に示
す座標入力パネル６８を使用した場合について説明した
が、この代わりに、図１及び図２に示す座標入力パネル
２０や、図７に示す座標入力パネルや、図１２に示す座
標入力パネルや、図１８に示す座標入力パネル等を使用
することができるものである。The ninth embodiment of the coordinate input device of the present invention.
In the above embodiment, the coordinate input panel 68 shown in FIG. 16 is used as the coordinate input panel, but instead of this, the coordinate input panel 20 shown in FIGS. 1 and 2 and the coordinate input panel shown in FIG. 7 are used. The panel, the coordinate input panel shown in FIG. 12, the coordinate input panel shown in FIG. 18, or the like can be used.

【０１４４】[0144]

【発明の効果】以上のように、本発明中、第１の発明及
び第２の発明の座標入力装置によれば、電位分布発生用
電極における電圧降下を小さくし、電位分布発生用電極
の近くに形成される等電位線の直線性を高め、抵抗膜に
直線性の良好な電位分布を発生させることができるの
で、精度の高い座標入力を行うことができる。As described above, according to the coordinate input device of the first invention and the second invention of the present invention, the voltage drop in the potential distribution generating electrode is reduced and the potential distribution generating electrode is close to the potential distribution generating electrode. Since the linearity of the equipotential line formed on the resistance film can be enhanced and a potential distribution with good linearity can be generated in the resistance film, highly accurate coordinate input can be performed.

【０１４５】また、第３の発明の座標入力装置によれ
ば、電位分布発生用電極を配列している部分の電圧降下
を小さくし、電位分布発生用電極を配列している部分の
近くに形成される等電位線の直線性を高め、抵抗膜に直
線性の良好な電位分布を発生させることができるので、
精度の高い座標入力を行うことができる。Further, according to the coordinate input device of the third aspect of the invention, the voltage drop in the portion where the potential distribution generating electrodes are arranged is made small, and it is formed near the portion where the potential distribution generating electrodes are arranged. Since it is possible to enhance the linearity of the equipotential lines to be generated and generate a potential distribution with good linearity in the resistance film,
Highly accurate coordinate input can be performed.

【０１４６】また、第４の発明の座標入力装置によれ
ば、抵抗膜に発生する電位分布の非線形性を考慮し、実
際に入力された座標の検出を行うことができるので、抵
抗膜に発生する電位分布に直線性がない場合であって
も、精度の高い座標入力を行うことができる。Further, according to the coordinate input device of the fourth aspect of the present invention, the actually input coordinates can be detected in consideration of the non-linearity of the potential distribution generated in the resistance film. Even if there is no linearity in the potential distribution to be performed, highly accurate coordinate input can be performed.

【０１４７】また、第５の発明の座標入力装置によれ
ば、電圧検出・駆動電圧発生手段により、電位分布発生
用電極の近くに形成される等電位線の直線性を高め、抵
抗膜に直線性の良好な電位分布を発生させることができ
るので、精度の高い座標入力を行うことができる。According to the coordinate input device of the fifth aspect of the invention, the voltage detecting / driving voltage generating means enhances the linearity of the equipotential lines formed near the potential distribution generating electrodes, and the equipotential lines are linearly formed on the resistance film. Since it is possible to generate a potential distribution having good properties, highly accurate coordinate input can be performed.

【０１４８】また、第６の発明の座標入力装置によれ
ば、電圧検出用導電膜が抵抗膜に接触したか否かの検出
は、電圧検出用導電膜側から抵抗膜側に流れる電流を検
出することにより行われるので、接触抵抗が変化した場
合においても、電圧検出用導電膜が抵抗膜に接触したか
否かの検出を確実に行うことができ、入力座標の検出を
確実に行うことができる。According to the coordinate input device of the sixth aspect of the present invention, the detection of whether or not the conductive film for voltage detection contacts the resistive film detects the current flowing from the conductive film side for voltage detection to the resistive film side. Therefore, even if the contact resistance changes, it is possible to reliably detect whether or not the conductive film for voltage detection is in contact with the resistive film, and to reliably detect the input coordinates. it can.

【図面の簡単な説明】[Brief description of the drawings]

【図１】本発明の座標入力装置の実施の第１の形態の要
部を概略的に示す図である。FIG. 1 is a diagram schematically showing a main part of a first embodiment of a coordinate input device of the present invention.

【図２】本発明の座標入力装置の実施の第１の形態が備
える座標入力パネルを示す概略的平面図である。FIG. 2 is a schematic plan view showing a coordinate input panel included in the first embodiment of the coordinate input device of the present invention.

【図３】本発明の座標入力装置の実施の第１の形態が備
える座標入力パネルの座標面の水平方向の位置と、抵抗
膜の垂線のピッチとの関係を示す図である。FIG. 3 is a diagram showing the relationship between the horizontal position of the coordinate plane of the coordinate input panel provided in the first embodiment of the coordinate input device of the present invention and the pitch of the perpendicular line of the resistive film.

【図４】本発明の座標入力装置の実施の第１の形態が備
える座標入力パネルの座標面の垂直方向の位置と、抵抗
膜の水平線のピッチとの関係を示す図である。FIG. 4 is a diagram showing the relationship between the vertical position of the coordinate plane of the coordinate input panel of the first embodiment of the coordinate input device of the present invention and the pitch of the horizontal lines of the resistive film.

【図５】本発明の座標入力装置の実施の第１の形態の作
用、効果を説明するための図である。FIG. 5 is a diagram for explaining the operation and effect of the first embodiment of the coordinate input device of the present invention.

【図６】本発明の座標入力装置の実施の第１の形態の作
用、効果を説明するための図である。FIG. 6 is a diagram for explaining the operation and effect of the first embodiment of the coordinate input device of the present invention.

【図７】本発明の座標入力装置の実施の第２の形態が備
える座標入力パネルを示す概略的平面図である。FIG. 7 is a schematic plan view showing a coordinate input panel included in the second embodiment of the coordinate input device of the present invention.

【図８】図７に示す座標入力パネルの座標面上、抵抗膜
の垂線の水平方向の位置と、抵抗膜の垂線の線幅との関
係を示す図である。8 is a diagram showing the relationship between the horizontal position of the perpendicular of the resistive film and the line width of the perpendicular of the resistive film on the coordinate plane of the coordinate input panel shown in FIG.

【図９】図７に示す座標入力パネルの座標面上、抵抗膜
の水平線の垂直方向の位置と、抵抗膜の水平線の線幅と
の関係を示す図である。9 is a diagram showing the relationship between the vertical position of the horizontal line of the resistive film and the line width of the horizontal line of the resistive film on the coordinate plane of the coordinate input panel shown in FIG.

【図１０】本発明の座標入力装置の実施の第２の形態の
作用、効果を説明するための図である。FIG. 10 is a diagram for explaining the operation and effect of the second embodiment of the coordinate input device of the present invention.

【図１１】本発明の座標入力装置の実施の第２の形態の
作用、効果を説明するための図である。FIG. 11 is a diagram for explaining the operation and effect of the second embodiment of the coordinate input device of the present invention.

【図１２】本発明の座標入力装置の実施の第３の形態が
備える座標入力パネルを示す概略的平面図である。FIG. 12 is a schematic plan view showing a coordinate input panel included in a third embodiment of the coordinate input device of the present invention.

【図１３】本発明の座標入力装置の実施の第３の形態が
備える座標入力パネルの周囲電極部を示す概略的平面図
である。FIG. 13 is a schematic plan view showing a peripheral electrode portion of a coordinate input panel included in a third embodiment of the coordinate input device of the present invention.

【図１４】本発明の座標入力装置の実施の第３の形態が
備える座標入力パネルにおける抵抗膜の水平方向の位置
と、三角形電極間の間隙との関係を示す図である。FIG. 14 is a diagram showing the relationship between the horizontal position of the resistive film and the gap between the triangular electrodes in the coordinate input panel provided in the third embodiment of the coordinate input device of the present invention.

【図１５】本発明の座標入力装置の実施の第３の形態が
備える座標入力パネルにおける抵抗膜の水平方向の位置
と、三角形電極の斜辺の長さとの関係を示す図である。FIG. 15 is a diagram showing the relationship between the horizontal position of the resistive film and the length of the hypotenuse of the triangular electrode in the coordinate input panel of the third embodiment of the coordinate input device of the present invention.

【図１６】本発明の座標入力装置の実施の第４の形態の
要部を概略的に示す図である。FIG. 16 is a diagram schematically showing a main part of a fourth embodiment of a coordinate input device of the present invention.

【図１７】本発明の座標入力装置の実施の第５の形態の
要部を概略的に示す図である。FIG. 17 is a diagram schematically showing a main part of a fifth embodiment of a coordinate input device of the present invention.

【図１８】本発明の座標入力装置の実施の第６の形態が
備える座標入力パネルを示す概略的平面図である。FIG. 18 is a schematic plan view showing a coordinate input panel included in a sixth embodiment of the coordinate input device of the present invention.

【図１９】本発明の座標入力装置の実施の第７の形態の
要部を概略的に示す図である。FIG. 19 is a diagram schematically showing a main part of a seventh embodiment of a coordinate input device of the present invention.

【図２０】本発明の座標入力装置の実施の第７の形態が
備える電圧検出・駆動電圧発生回路の構成を示す回路図
である。FIG. 20 is a circuit diagram showing a configuration of a voltage detection / drive voltage generation circuit included in a seventh embodiment of the coordinate input device of the present invention.

【図２１】本発明の座標入力装置の実施の第８の形態の
要部を概略的に示す図である。FIG. 21 is a diagram schematically showing a main part of an eighth embodiment of the coordinate input device of the invention.

【図２２】本発明の座標入力装置の実施の第９の形態の
要部を概略的に示す図である。FIG. 22 is a diagram schematically showing a main part of a ninth embodiment of the coordinate input device of the invention.

【図２３】従来の座標入力装置の一例の要部を概略的に
示す図である。FIG. 23 is a diagram schematically showing a main part of an example of a conventional coordinate input device.

【図２４】図２３に示す従来の座標入力装置が有する問
題点を説明するための図である。FIG. 24 is a diagram for explaining a problem that the conventional coordinate input device shown in FIG. 23 has.

【図２５】図２３に示す従来の座標入力装置が有する問
題点を説明するための図である。FIG. 25 is a diagram for explaining a problem that the conventional coordinate input device shown in FIG. 23 has.

【図２６】座標入力パネルの抵抗膜に発生させる電位分
布の直線性を高めるものとして提案されている従来の方
法の一例を説明するための図である。FIG. 26 is a diagram for explaining an example of a conventional method proposed for increasing the linearity of the potential distribution generated in the resistance film of the coordinate input panel.

【符号の説明】[Explanation of symbols]

２２〜２５ 周囲電極 ２６〜２９ 駆動電圧印加端子 ３１ 座標入力ペン 22-25 Peripheral electrodes 26-29 Drive voltage application terminal 31 Coordinate input pen

Claims (11)

【特許請求の範囲】[Claims] 【請求項１】矩形状の基板と、この基板上に形成された
抵抗膜と、この抵抗膜上の周辺部に枠状に形成され、直
交する電位分布を前記抵抗膜に交互に発生させるための
駆動電圧が四隅に印加される電位分布発生用電極とを備
え、前記抵抗膜の所定の領域を直交座標面とする座標入
力パネルを有し、前記抵抗膜上、入力座標として選択さ
れた位置の電圧を検出することにより、入力座標の検出
を行う座標入力装置において、前記抵抗膜は、Ｙ軸方向
に延びる垂線及びＸ軸方向に延びる水平線からなる格子
状に、かつ、前記垂線及び前記水平線の線幅をそれぞれ
同一ないし略同一とし、前記垂線及び前記水平線のピッ
チがそれぞれ中央部にいくに従って大きくなるようにパ
ターニングされていることを特徴とする座標入力装置。1. A rectangular substrate, a resistive film formed on the substrate, and a frame-shaped peripheral portion on the resistive film for alternately generating an orthogonal potential distribution in the resistive film. And a coordinate input panel having a predetermined area of the resistance film as a rectangular coordinate plane, and a position selected as an input coordinate on the resistance film. In the coordinate input device that detects the input coordinates by detecting the voltage of, the resistance film is in a grid shape composed of a vertical line extending in the Y-axis direction and a horizontal line extending in the X-axis direction, and the vertical line and the horizontal line. The coordinate input device has the same or substantially the same line width, and is patterned such that the pitches of the perpendicular lines and the horizontal lines become larger toward the center. 【請求項２】矩形状の基板と、この基板上に形成された
抵抗膜と、この抵抗膜上の周辺部に枠状に形成され、直
交する電位分布を前記抵抗膜に交互に発生させるための
駆動電圧が四隅に印加される電位分布発生用電極とを備
え、前記抵抗膜の所定の領域を直交座標面とする座標入
力パネルを有し、前記抵抗膜上、入力座標として選択さ
れた位置の電圧を検出することにより、入力座標の検出
を行う座標入力装置において、前記抵抗膜は、Ｙ軸方向
に延びる垂線及びＸ軸方向に延びる水平線からなる格子
状に、かつ、前記垂線及び前記水平線のピッチをそれぞ
れ同一ないし略同一とし、前記垂線及び前記水平線のう
ち、少なくとも、前記電位分布発生用電極が長さ方向に
重畳されていない水平線及び垂線の線幅がそれぞれ中央
部にいくに従って小さくなるようにパターニングされて
いることを特徴とする座標入力装置。2. A rectangular substrate, a resistive film formed on the substrate, and a frame-shaped peripheral portion on the resistive film for alternately generating orthogonal potential distributions on the resistive film. And a coordinate input panel having a predetermined area of the resistance film as a rectangular coordinate plane, and a position selected as an input coordinate on the resistance film. In the coordinate input device that detects the input coordinates by detecting the voltage of, the resistance film is in a grid shape composed of a vertical line extending in the Y-axis direction and a horizontal line extending in the X-axis direction, and the vertical line and the horizontal line. Of the vertical lines and the horizontal lines, at least, among the vertical lines and the horizontal lines, the line widths of the horizontal lines and the vertical lines where the potential distribution generating electrodes are not overlapped in the lengthwise direction respectively go to the central portion. Coordinate input apparatus characterized by being patterned into bloom. 【請求項３】矩形状の基板と、この基板上に形成され、
直交する電位分布が交互に発生される抵抗膜とを備え、
この抵抗膜の所定の領域を直交座標面とする座標入力パ
ネルを有し、前記抵抗膜上、入力座標として選択された
位置の電圧を検出することにより、入力座標の検出を行
う座標入力装置において、前記座標入力パネルは、前記
抵抗膜の四隅に、前記電位分布を発生させるための駆動
電圧が印加される駆動電圧印加用電極を設けると共に、
前記抵抗膜上の周辺部、かつ、前記駆動電圧印加用電極
間に、前記電位分布を発生させるための三角形ないし略
三角形からなる電位分布発生用電極を間隙をもって、か
つ、隣接するもの同士が１８０度ないし略１８０度回転
させた関係となるように配列させていることを特徴とす
る座標入力装置。3. A rectangular substrate, formed on the substrate,
And a resistance film in which orthogonal potential distributions are alternately generated,
A coordinate input device that has a coordinate input panel having a predetermined area of the resistive film as an orthogonal coordinate plane, and detects the input coordinate by detecting the voltage at a position selected as the input coordinate on the resistive film. The coordinate input panel is provided with drive voltage applying electrodes to which a drive voltage for generating the potential distribution is applied, at four corners of the resistive film,
There are 180 adjacent potential distribution generating electrodes each having a triangular shape or a substantially triangular shape for generating the potential distribution between the driving voltage applying electrodes and the peripheral portion of the resistive film. A coordinate input device, wherein the coordinate input devices are arranged so as to be rotated by 180 degrees or approximately 180 degrees. 【請求項４】前記電位分布発生用電極は、大きさを同一
ないし略同一とし、かつ、隣接するもの同士の間隙が中
央部にいくに従って小さくなるように形成されているこ
とを特徴とする請求項３記載の座標入力装置。4. The potential distribution generating electrodes are formed to have the same or substantially the same size, and the gap between adjacent ones is formed so as to become smaller toward the central portion. Item 3. The coordinate input device according to item 3. 【請求項５】前記電位分布発生用電極は、隣接するもの
同士の間隙を同一ないし略同一とし、大きさが中央部に
いくに従って大きくなるように形成されていることを特
徴とする請求項３記載の座標入力装置。5. The potential distribution generating electrode is formed such that the gaps between adjacent electrodes are the same or substantially the same, and the size increases toward the central portion. The coordinate input device described. 【請求項６】矩形状の基板と、この基板上に形成された
抵抗膜と、この抵抗膜上の周辺部に枠状に形成され、直
交する電位分布を前記抵抗膜に交互に発生させるための
駆動電圧が四隅に印加される電位分布発生用電極とを備
え、前記抵抗膜の所定の領域を直交座標面とする座標入
力パネルを有してなる座標入力装置において、前記抵抗
膜上、入力座標として選択された位置の電圧と、前記電
位分布発生用電極の所定の位置の電圧とを検出して、前
記抵抗膜上、入力座標として選択された位置の電圧と、
前記電位分布発生用電極の所定の位置の電圧とから入力
座標を検出する入力座標検出手段を備えていることを特
徴とする座標入力装置。6. A rectangular substrate, a resistive film formed on the substrate, and a frame-shaped peripheral portion on the resistive film for alternately generating orthogonal potential distributions on the resistive film. In the coordinate input device having a coordinate input panel having the potential distribution generating electrodes to which the driving voltage of 4 is applied to the four corners and having a predetermined region of the resistive film as an orthogonal coordinate plane, the input on the resistive film is performed. The voltage at the position selected as the coordinate and the voltage at the predetermined position of the potential distribution generating electrode are detected, and the voltage at the position selected as the input coordinate on the resistance film,
A coordinate input device comprising input coordinate detection means for detecting input coordinates from a voltage at a predetermined position of the potential distribution generation electrode. 【請求項７】矩形状の基板と、この基板上に形成された
抵抗膜と、この抵抗膜上の周辺部に枠状に形成され、直
交する電位分布を前記抵抗膜に交互に発生させるための
駆動電圧が四隅に印加される電位分布発生用電極とを備
え、前記抵抗膜の所定の領域を直交座標面とする座標入
力パネルを有し、前記抵抗膜上、入力座標として選択さ
れた位置の電圧を検出することにより、入力座標の検出
を行う座標入力装置において、前記電位分布発生用電極
の所定の位置の電圧を検出して、前記抵抗膜に発生する
電位分布の直線性を高めるための駆動電圧を前記電位分
布発生用電極の所定の位置に印加する電圧検出・駆動電
圧発生手段を備えていることを特徴とする座標入力装
置。7. A rectangular substrate, a resistive film formed on the substrate, and a frame-shaped peripheral portion on the resistive film for alternately generating orthogonal potential distributions on the resistive film. And a coordinate input panel having a predetermined area of the resistance film as a rectangular coordinate plane, and a position selected as an input coordinate on the resistance film. In order to enhance the linearity of the potential distribution generated in the resistance film by detecting the voltage at a predetermined position of the potential distribution generation electrode in the coordinate input device that detects the input coordinate by detecting the voltage 2. A coordinate input device comprising voltage detection / drive voltage generation means for applying the drive voltage of 1. to a predetermined position of the potential distribution generation electrode. 【請求項８】前記電位分布発生用電極の所定の位置の電
圧を検出する手段として、前記電位分布発生用電極を構
成する各辺の中央部ないし略中央部に、その先端を前記
抵抗膜上に突出させ、かつ、前記抵抗膜に接触させた前
記電位分布発生用電極よりも低抵抗の電圧検出用電極を
備えていることを特徴とする請求項６又は７記載の座標
入力装置。8. A means for detecting the voltage at a predetermined position of the potential distribution generation electrode, wherein the tip of the potential distribution generation electrode is on the resistance film at the center or substantially the center of each side of the potential distribution generation electrode. 8. The coordinate input device according to claim 6, further comprising a voltage detection electrode having a resistance lower than that of the potential distribution generation electrode that is protruded to the surface and is in contact with the resistance film. 【請求項９】前記抵抗膜に対して一定の間隔をもって電
圧検出用導電膜を対向させ、入力座標の選択は、前記電
圧検出用導電膜の入力座標に対応する位置の前記抵抗膜
との対向部分を前記抵抗膜に接触させることにより行
い、入力座標の検出は、前記抵抗膜上、前記電圧検出用
導電膜を介して入力座標として選択された位置の電圧を
検出することにより行うように構成されていることを特
徴とする請求項１、２、３、４、５、６、７又は８記載
の座標入力装置。9. A voltage detection conductive film is made to face the resistance film at a constant interval, and input coordinates are selected so as to face the resistance film at a position corresponding to the input coordinates of the voltage detection conductive film. The part is brought into contact with the resistance film, and the input coordinates are detected by detecting the voltage at the position selected as the input coordinates on the resistance film through the voltage detecting conductive film. The coordinate input device according to claim 1, 2, 3, 4, 5, 6, 7 or 8. 【請求項１０】前記電圧検出用導電膜が前記抵抗膜に接
触した場合に、前記電圧検出用導電膜側から前記抵抗膜
側に電流を流し、この電流を検出することにより、前記
電圧検出用導電膜が前記抵抗膜に接触したことを検出す
る電圧検出用導電膜接触検出手段と、この電圧検出用導
電膜接触検出手段により前記電圧検出用導電膜が前記抵
抗膜に接触したことが検出された場合に、前記駆動電圧
を前記座標入力パネルに供給する駆動電圧供給手段とを
備えていることを特徴とする請求項９記載の座標入力装
置。10. When the conductive film for voltage detection contacts the resistance film, a current is caused to flow from the conductive film side for voltage detection to the resistance film side, and the current is detected to detect the voltage. A conductive film contact detection means for voltage detection for detecting that the conductive film has come into contact with the resistance film, and this conductive film contact detection means for voltage detection detects that the voltage detection conductive film has come into contact with the resistance film. 10. The coordinate input device according to claim 9, further comprising drive voltage supply means for supplying the drive voltage to the coordinate input panel. 【請求項１１】矩形状の基板と、この基板上に形成され
た抵抗膜と、この抵抗膜上の周辺部に枠状に形成され、
直交する電位分布を前記抵抗膜に交互に発生させるため
の駆動電圧が四隅に印加される電位分布発生用電極と、
前記抵抗膜に対して一定の間隔をもって対向させた電圧
検出用導電膜とを備え、前記抵抗膜の所定の領域を直交
座標面とする座標入力パネルを有し、入力座標の選択
は、前記電圧検出用導電膜の入力座標に対応する位置の
前記抵抗膜との対向部分を前記抵抗膜に接触させること
により行い、入力座標の検出は、前記抵抗膜上、前記電
圧検出用導電膜を介して入力座標として選択された位置
の電圧を検出することにより行う座標入力装置におい
て、前記電圧検出用導電膜が前記抵抗膜に接触した場合
に、前記電圧検出用導電膜側から前記抵抗膜側に電流を
流し、この電流を検出することにより、前記電圧検出用
導電膜が前記抵抗膜に接触したことを検出する電圧検出
用導電膜接触検出手段と、この電圧検出用導電膜接触検
出手段により前記電圧検出用導電膜が前記抵抗膜に接触
したことが検出された場合に、前記駆動電圧を前記座標
入力パネルに供給する駆動電圧供給手段とを備えている
ことを特徴とする座標入力装置。11. A rectangular substrate, a resistive film formed on the substrate, and a frame-shaped peripheral portion on the resistive film,
A potential distribution generation electrode to which driving voltages for alternately generating a potential distribution orthogonal to each other in the resistance film are applied to the four corners,
A voltage detection conductive film facing the resistance film at a constant interval, and a coordinate input panel having a predetermined region of the resistance film as an orthogonal coordinate plane. It is carried out by contacting a portion of the conductive film for detection that faces the resistance film at a position corresponding to the input coordinate with the resistance film, and the input coordinate is detected on the resistance film via the voltage detection conductive film. In a coordinate input device that detects a voltage at a position selected as an input coordinate, a current flows from the voltage detection conductive film side to the resistance film side when the voltage detection conductive film contacts the resistance film. And a voltage detection conductive film contact detection means for detecting that the voltage detection conductive film is in contact with the resistance film by detecting this current, and the voltage detection conductive film contact detection means. Coordinate input device in which the conductive film for out and said when it contacts the resistive film is detected, and a driving voltage supplying means for supplying to said coordinate input panel the driving voltage.
JP32200795A 1995-12-11 1995-12-11 Coordinate input device Expired - Lifetime JP3799639B2 (en)

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Application Number Priority Date Filing Date Title
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