JPH0113124B2 - - Google Patents
Info
- Publication number
- JPH0113124B2 JPH0113124B2 JP59262965A JP26296584A JPH0113124B2 JP H0113124 B2 JPH0113124 B2 JP H0113124B2 JP 59262965 A JP59262965 A JP 59262965A JP 26296584 A JP26296584 A JP 26296584A JP H0113124 B2 JPH0113124 B2 JP H0113124B2
- Authority
- JP
- Japan
- Prior art keywords
- detection
- resistor
- current
- driving voltage
- pressure
- 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.)
- Expired
Links
- 238000001514 detection method Methods 0.000 claims description 66
- 238000005070 sampling Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 4
- 230000003321 amplification Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 239000012780 transparent material Substances 0.000 description 1
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、手書き入力時等に筆圧が加えられ
た位置の座標を検出するための座標検出装置に関
するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a coordinate detection device for detecting the coordinates of a position where pen pressure is applied during handwriting input or the like.
従来、情報入力装置のひとつとして、感圧抵抗
体シートを用いてその押圧位置の抵抗変化を利用
して情報入力を行うものがある。
2. Description of the Related Art Conventionally, as one type of information input device, there is one that inputs information by using a pressure sensitive resistor sheet and utilizing a change in resistance at a pressed position.
第４図はその構成の一例を示す回路図である。
同図において、感圧シート１の上面には金属シー
トの導電層２が配置され、かつ下面には一様な面
抵抗を有する抵抗体３が積層配設されており、こ
れらにより入力面が構成されている。第５図はそ
の積層構造を示すもので、第４図のＡ―Ａ断面矢
視図である。 FIG. 4 is a circuit diagram showing an example of the configuration.
In the figure, a conductive layer 2 of a metal sheet is arranged on the upper surface of a pressure sensitive sheet 1, and a resistor 3 having a uniform sheet resistance is laminated on the lower surface, and an input surface is formed by these. has been done. FIG. 5 shows the laminated structure, and is a cross-sectional view taken along the line AA in FIG. 4.
さて、上記入力面の導電層２と接地端子との間
には、駆動電圧印加用の電源４が接続されてお
り、この電源４により導電層２には常に正の駆動
電圧が印加されている。一方、抵抗体３の各辺部
には、それぞれ複数のダイオードを等間隔に配置
し接続した検出電極５ａ，５ｂ，５ｃ，５ｄが設
けられている。これらの検出電極５ａ，５ｂ，５
ｃ，５ｄは、電源４から導電層２および感圧シー
ト１の押圧位置を経て抵抗体３に流入する電流
を、抵抗体３の各辺部全域から一様に流出させる
ためのものである。なお、ダイオードは、一旦流
出した電流が再び抵抗体３に還流しないようにす
る。そして、各検出電極５ａ，５ｂ，５ｃ，５ｄ
は、それぞれ検出抵抗器６ａ，６ｂ，６ｃ，６ｄ
を介したのち、相対向する電極５ａ，５ｂおよび
５ｃ，５ｄ毎に共通接続され、しかるのちスイツ
チ７ａ，７ｂを介して、１個の定電流源８に接続
されている。この定電流源８は、前記駆動電圧印
加用の電源４の出力電流を一定化するためのもの
である。また、上記各検出抵抗器６ａ，６ｂ，６
ｃ，６ｄのうち検出抵抗器６ｂ，６ｃには、その
電圧降下を検出するための演算増幅器９ａ，９ｂ
が接続されており、これらの演算増幅器９ａ，９
ｂで検出された電圧値はサンプリングホールド回
路（Ｓ／Ｈ）１０ａ，１０ｂを経て出力されるよ
うになつている。なお、検出制御回路１１は、各
スイツチ７ａ，７ｂを交互に閉成させるととも
に、それに合わせてサンプリングホールド回路１
０ａ，１０ｂにサンプリングホールド動作を行わ
せ、これにより前記入力面上の押圧位置をＸ方向
とに分けてそれぞれ検出するためのものである。 Now, a power source 4 for applying a driving voltage is connected between the conductive layer 2 on the input surface and the ground terminal, and a positive driving voltage is always applied to the conductive layer 2 by this power source 4. . On the other hand, each side of the resistor 3 is provided with detection electrodes 5a, 5b, 5c, and 5d each having a plurality of diodes arranged and connected at equal intervals. These detection electrodes 5a, 5b, 5
5d and 5d are for allowing the current flowing from the power supply 4 into the resistor 3 through the pressed positions of the conductive layer 2 and the pressure-sensitive sheet 1 to uniformly flow out from the entire area of each side of the resistor 3. Note that the diode prevents the current that has once flowed out from flowing back into the resistor 3. And each detection electrode 5a, 5b, 5c, 5d
are the detection resistors 6a, 6b, 6c, 6d, respectively.
After that, the opposing electrodes 5a, 5b and 5c, 5d are connected in common, and then connected to one constant current source 8 via switches 7a, 7b. This constant current source 8 is for making the output current of the power source 4 for applying the drive voltage constant. In addition, each of the detection resistors 6a, 6b, 6
Of the detection resistors 6b and 6c, operational amplifiers 9a and 9b are used to detect the voltage drop.
are connected, and these operational amplifiers 9a, 9
The voltage value detected at point b is outputted via sampling and hold circuits (S/H) 10a and 10b. Note that the detection control circuit 11 closes the switches 7a and 7b alternately, and also closes the sampling and hold circuit 1 accordingly.
0a and 10b perform a sampling and holding operation, thereby detecting the pressed position on the input surface separately in the X direction and in the X direction.
このような構成であるから、入力面の任意の位
置を指示ペン等で押圧操作すると、この押圧位置
における感圧シート１の抵抗値が低下して略短絡
状態となる。ここで、検出制御回路１１から発せ
られる制御信号によりスイツチ７ａが閉成させて
いるものとすると、前記指示ペンによる押圧操作
により、電源４の出力電流が導電層２、感圧シー
ト１の押圧位置および抵抗体３を介して検出電極
５ａ，５ｂから流出し、しかるのち検出抵抗器６
ａ，６ｂに流れる。そして、これらの検出抵抗器
６ａ，６ｂのうち、検出抵抗器６ｂの電圧降下が
演算増幅器９ｂで検出され、この検出値はサンプ
リングホールド回路１０ｂで保持される。なお、
各検出抵抗器６ａ，６ｂに流れる電流の和は、定
電流源８により一定値に限定されるため、各検出
抵抗器６ａ，６ｂに流れる電流の比は、感圧シー
ト１の押圧位置に対応する抵抗体３の抵抗比に対
応したものとなる。したがつて、演算増幅器９ｂ
により検出し、サンプリングホールド回路１０ｂ
で保持した検出抵抗器６ｂの電圧降下の値は、そ
のまま入力面における押圧位置のＸ方向の座標を
示すものとなる。 With such a configuration, when an arbitrary position on the input surface is pressed with an indicator pen or the like, the resistance value of the pressure-sensitive sheet 1 at this pressed position decreases, resulting in a substantially short-circuited state. Here, assuming that the switch 7a is closed by the control signal issued from the detection control circuit 11, the output current of the power source 4 is transferred to the pressed position of the conductive layer 2 and the pressure-sensitive sheet 1 by the pressing operation with the indicator pen. and flows out from the detection electrodes 5a, 5b via the resistor 3, and then flows out from the detection resistor 6.
a, 6b. Of these detection resistors 6a and 6b, a voltage drop across detection resistor 6b is detected by operational amplifier 9b, and this detected value is held in sampling hold circuit 10b. In addition,
Since the sum of the currents flowing through each detection resistor 6a, 6b is limited to a constant value by the constant current source 8, the ratio of the currents flowing through each detection resistor 6a, 6b corresponds to the pressing position of the pressure sensitive sheet 1. This corresponds to the resistance ratio of the resistor 3. Therefore, operational amplifier 9b
Detected by sampling hold circuit 10b
The value of the voltage drop across the detection resistor 6b held at , directly indicates the X-direction coordinate of the pressed position on the input surface.
こうして押圧位置のＸ方向の座標が検出される
と、検出制御回路１１から制御信号が出力されて
スイツチ７ａに代わつてスイツチ７ｂが閉成す
る。この結果、今度は電源４の出力電流は検出電
極５ｃ，５ｄから流出して検出抵抗器６ｃ，６ｄ
に流れ、検出抵抗器６ｃの電圧降下が押圧位置の
Ｙ方向の座標を示す情報として演算増幅器９ａに
より検出される。かくして、押圧位置のＸ方向お
よびＹ方向の各座標が検出される。 When the X-direction coordinates of the pressed position are detected in this way, a control signal is output from the detection control circuit 11, and the switch 7b is closed instead of the switch 7a. As a result, the output current of the power source 4 flows out from the detection electrodes 5c, 5d and the detection resistors 6c, 6d.
The voltage drop across the detection resistor 6c is detected by the operational amplifier 9a as information indicating the Y-direction coordinate of the pressed position. In this way, the coordinates of the pressed position in the X and Y directions are detected.
このように、感圧シート１上の押圧位置を、つ
まり入力情報を静電容量形等の他のタブレツト装
置に比べて比較的簡単に検出することができる。 In this way, the pressed position on the pressure-sensitive sheet 1, that is, the input information, can be detected relatively easily compared to other tablet devices such as capacitance type tablet devices.
しかしながら、前記従来の装置は、検出抵抗器
６ｂ，６ｃに流れる電流による電圧降下を検出す
るものであり、検出誤差を小さくするため検出抵
抗器６ｂ，６ｃの抵抗値は、抵抗体３の抵抗値よ
り充分小さく選ばれる。したがつて、検出抵抗器
６ｂ，６ｃの両端に生ずる電圧降下は微小であ
り、演算増幅器９ａ，９ｂは、大きな増幅率を要
し、外来雑音により影響を受けやすいという欠点
があつた。
However, the conventional device detects the voltage drop caused by the current flowing through the detection resistors 6b and 6c, and in order to reduce the detection error, the resistance values of the detection resistors 6b and 6c are determined based on the resistance value of the resistor 3. chosen to be sufficiently smaller. Therefore, the voltage drop occurring across the detection resistors 6b, 6c is minute, and the operational amplifiers 9a, 9b have the disadvantage of requiring large amplification factors and being susceptible to external noise.
この発明は、これらの欠点を除去し、簡単な構
成で実現でき、かつ精度が良く安定性の高い位置
検出を可能とした座標検出装置を得ることを目的
とする。 The object of the present invention is to eliminate these drawbacks, to provide a coordinate detection device that can be realized with a simple configuration, and that enables highly accurate and highly stable position detection.
この発明に係る座標検出装置は、入力面に配置
された抵抗体の４辺に各々検出電極を設け、２つ
の定電流源により、駆動電圧印加用電源の印加に
よつて前記検出電極に流れる電流を各々一定化
し、対向する検出電極間の電位差に基づいて入力
点の座標を検出するものである。
In the coordinate detection device according to the present invention, detection electrodes are provided on each of the four sides of a resistor arranged on an input surface, and a current flows to the detection electrodes by application of a power source for applying a driving voltage by two constant current sources. are held constant, and the coordinates of the input point are detected based on the potential difference between opposing detection electrodes.
４辺のうち対向する２辺の検出電極にスイツチ
を介してそれぞれ定電流源が接続され、圧力が加
えられた点から駆動電圧印加用電源によつて電流
が供給され、入力面の抵抗体による電圧降下によ
つて両検出電極間に圧力が加えられた位置に応じ
た電圧が発生する。
A constant current source is connected to each of the detection electrodes on two opposing sides of the four sides via a switch, and a current is supplied from the point where pressure is applied by the drive voltage application power source, and a current is supplied from the point where pressure is applied by the resistor on the input surface. Due to the voltage drop, a voltage is generated depending on the position where pressure is applied between both detection electrodes.
第１図はこの発明の一実施例における回路構成
で、第４図と同一部分には同一の符号を付して詳
しい説明は省略する。
FIG. 1 shows a circuit configuration according to an embodiment of the present invention, and the same parts as in FIG. 4 are given the same reference numerals, and detailed explanation will be omitted.
第１図において、各検出電極５ａ，５ｂと接地
端子との間には、スイツチ７ａ，７ｃを介して、
各々定電流源８ａと８ｂが接続されている。他の
辺には検出電極５ｃと５ｄが、各々スイツチ７ｂ
と７ｄと定電流源８ａと８ｂをへて接地されてい
る。検出電極５ｃと検出電極５ｄとの間および検
出電極５ａと検出電極５ｂとの間には、各々演算
増幅器９ａ，９ｂが接続されており、各々電位差
を検出し、その出力を入力位置の座標（Ｙ座標お
よびＸ座標）として、サンプリングホールド回路
１０ａ，１０ｂに送出する。 In FIG. 1, switches 7a, 7c are connected between each detection electrode 5a, 5b and the ground terminal.
Constant current sources 8a and 8b are connected to each. On the other sides, detection electrodes 5c and 5d are connected to the switch 7b.
and 7d, and are grounded through constant current sources 8a and 8b. Operational amplifiers 9a and 9b are connected between the detection electrode 5c and the detection electrode 5d and between the detection electrode 5a and the detection electrode 5b, respectively, and each detects a potential difference and outputs the output from the coordinates ( (Y coordinate and X coordinate) to the sampling and hold circuits 10a and 10b.
検出制御回路１１は、スイツチ７ａと７ｂの組
と７ｃと７ｄの組とを交互に開閉させるととも
に、それに同期して、サンプリングホールド回路
１０ａ，１０ｂにサンプリングホールド動作を行
わせる。さらに、２６は検出判別部で、比較回路
２４と基準電源２５とからなり、演算増幅器９
ａ，９ｂに付属している。検出判別部２６の動作
は、検出電極５ａ，５ｄに現れる電位を、比較回
路２４によつて基準電源２５の電圧E1と比較し、
E1を超えたとき、比較回路２４は“Ｈ”レベル
のＺ信号を発する。Ｚ信号が“Ｈ”レベルのとき
入力（押圧）ありと判定して、そのときのＸ，Ｙ
信号を有意とし、コンピユータへの入力等に誤り
が生じないようにする。 The detection control circuit 11 alternately opens and closes the set of switches 7a and 7b and the set of switches 7c and 7d, and in synchronization with this, causes the sampling and holding circuits 10a and 10b to perform a sampling and holding operation. Further, reference numeral 26 denotes a detection/discrimination section, which is composed of a comparison circuit 24 and a reference power supply 25, and includes an operational amplifier 9.
It is attached to a and 9b. The operation of the detection determination unit 26 is to compare the potential appearing on the detection electrodes 5a and 5d with the voltage E1 of the reference power source 25 by the comparison circuit 24,
When E1 is exceeded, the comparator circuit 24 generates a Z signal of "H" level. When the Z signal is at “H” level, it is determined that there is an input (press), and the X, Y at that time
Signals are made significant so that errors do not occur in inputs to computers, etc.
第２図は、第１図の装置の動作を説明するため
の等価回路であり、入力が行われその筆圧によつ
て導電層２が感圧シート１を介して抵抗体３と電
気的に入力位置で接触し、スイツチ７ａと７ｃが
閉じて、７ｂと７ｄが開いている状態を示してい
る。すなわちＸ座標の検出を行つている時点の等
価回路を示している。 FIG. 2 is an equivalent circuit for explaining the operation of the device shown in FIG. A state in which the switches 7a and 7c are closed and the switches 7b and 7d are open is shown when they are in contact at the input position. That is, it shows an equivalent circuit at the time when the X coordinate is being detected.
第２図において符号１００で示している入力位
置に、駆動電圧印加用の電源４の電圧Ｅが加えら
れると検出電極５ａと入力位置１００との間に定
電流Ｉが、検出電極５ｂと入力位置１００との間
にも定電流Ｉが流れる。R3は導電層２と抵抗体
３との接触抵抗である。抵抗体３は一様な抵抗値
をもち、入力位置１００と検出電極５ａ間の抵抗
値R1は、入力点のＸ座標に比例する。したがつ
て、R1に定電流Ｉが流れることによつて生ずる
電圧R1Iおよび入力位置１００と検出電極５ｂと
の間の抵抗値R2に定電流Ｉが流れることによつ
て生ずる電圧R2Iとの差を測定すれば、入力点の
Ｘ座標が得られる。電圧Ｖ＝R1I−R2Iは、演算
増幅器９ｂによつて測定される。 When the voltage E of the power source 4 for applying the driving voltage is applied to the input position indicated by the reference numeral 100 in FIG. 2, a constant current I is generated between the detection electrode 5a and the input position 100, and A constant current I also flows between the terminal and the terminal 100. R 3 is the contact resistance between the conductive layer 2 and the resistor 3. The resistor 3 has a uniform resistance value, and the resistance value R 1 between the input position 100 and the detection electrode 5a is proportional to the X coordinate of the input point. Therefore, the voltage R 1 I generated when the constant current I flows through R 1 and the voltage R generated when the constant current I flows through the resistance value R 2 between the input position 100 and the detection electrode 5b. 2 By measuring the difference from I, you can obtain the X coordinate of the input point. The voltage V=R 1 I−R 2 I is measured by operational amplifier 9b.
電圧VX＝R1I−R2Iは検出電極５ａと５ｂ間の
抵抗値をＲ（＝R1＋R2）とおくと次のように表わ
せる。 The voltage V X =R 1 I−R 2 I can be expressed as follows, assuming that the resistance value between the detection electrodes 5a and 5b is R (=R 1 +R 2 ).
VX＝R1I−（Ｒ−R1）Ｉ
＝2R1I−RI
上式で、Ｉは定電流であるから一定値であり、
Ｒも定数であるからVXはR1に比例した電圧とな
る。R1は入力位置の検出電極５ａからの距離ｘ
に比例するから、電圧VXは距離ｘに比例する値
として得られる。 V _ _ _
Since R is also a constant, V X becomes a voltage proportional to R 1 . R 1 is the distance x from the detection electrode 5a at the input position
Since the voltage V X is proportional to the distance x, the voltage V X is obtained as a value proportional to the distance x.
このＸ座標信号は、Ｙ座標を検出している時
（スイツチ７ａ，７ｃが開き、７ｂ，７ｄが閉じ
ている時）にも、サンプリングホールド回路１０
ｂで保持される。 This X coordinate signal is transmitted to the sampling hold circuit 10 even when the Y coordinate is being detected (when switches 7a and 7c are open and switches 7b and 7d are closed).
It is held at b.
検出電極５ａ，５ｂ，５ｃ，５ｄ中のダイオー
ドの電圧降下は、流れる電流が一定であるから、
あらかじめ知ることができ補正できる。 The voltage drop across the diodes in the detection electrodes 5a, 5b, 5c, and 5d is because the flowing current is constant.
This can be known in advance and corrected.
なお、この発明の装置に用いる入力面として
は、第１図に示す構成に限定する必要はなく、第
３図のように抵抗体３をITO透明膜や導電性ガラ
ス等の透明な材料を用いて構成し、駆動電圧印加
用の電源４の出力を直接電気ペン１０１で抵抗体
３に印加する構成とすることもでき、CRTやそ
の他の平面デイスプレイと重ねて使用することも
できる。また、感圧シート１としては感圧ゴムシ
ートや一定間隔を保つスペーサを用いてもよく、
フレキシブルな導電層２あるいは抵抗体３に張力
をかけておき、圧力が加わつたときにだけ両者が
電気的に接触するような構成にすることもでき
る。 Note that the input surface used in the device of this invention is not limited to the configuration shown in FIG. 1, and the resistor 3 may be made of a transparent material such as an ITO transparent film or conductive glass as shown in FIG. The output of the power source 4 for applying a driving voltage can be directly applied to the resistor 3 by the electric pen 101, and it can also be used in combination with a CRT or other flat display. Further, as the pressure-sensitive sheet 1, a pressure-sensitive rubber sheet or a spacer that maintains a constant interval may be used.
It is also possible to create a structure in which tension is applied to the flexible conductive layer 2 or the resistor 3 so that they come into electrical contact only when pressure is applied.
この発明は以上説明したように、入力面に配置
される抵抗体の４辺に各々検出電極を設け、２つ
の定電流源により、駆動電圧印加用の電源の印加
によつて前記検出電極に流れる電流を各々一定化
し、対向する検出電極間の電位差に基づいて入力
点の座標を検出するようにしたので、外来雑音の
影響を受けにくくすることができ、かつ精度よく
安定性の高い位置検出が可能となる利点を有す
る。
As explained above, in this invention, detection electrodes are provided on each of the four sides of a resistor arranged on an input surface, and a current flows to the detection electrodes by applying a power source for applying a driving voltage using two constant current sources. Since each current is kept constant and the coordinates of the input point are detected based on the potential difference between the opposing detection electrodes, it is less susceptible to external noise and allows accurate and stable position detection. It has the advantage of being possible.
第１図はこの発明に係る座標検出装置の一実施
例の構成を示すブロツク図、第２図は第１図の実
施例を説明するための等価回路図、第３図はこの
発明の他の実施例を示す斜視図、第４図は従来の
座標検出装置の構成を示すブロツク図、第５図は
第４図における入力面の断面図である。
図において、１は感圧シート、２は導電層、３
は抵抗体、４は駆動電圧印加用の電源、５は電
極、５ａ，５ｂ，５ｃ，５ｄは検出電極、６ａ，
６ｂ，６ｃ，６ｄは検出抵抗器、７ａ，７ｂ，７
ｃ，７ｄはスイツチ、８，８ａ，８ｂは定電流
源、９ａ，９ｂは演算増幅器、１０ａ，１０ｂは
サンプリングホールド回路、１１は検出制御回
路、２４は比較回路、２５は基準電源、２６は検
出判別部、１００は入力位置、１０１は電気ペン
である。
FIG. 1 is a block diagram showing the configuration of one embodiment of the coordinate detection device according to the present invention, FIG. 2 is an equivalent circuit diagram for explaining the embodiment of FIG. 1, and FIG. FIG. 4 is a block diagram showing the configuration of a conventional coordinate detection device, and FIG. 5 is a sectional view of the input surface in FIG. 4. In the figure, 1 is a pressure-sensitive sheet, 2 is a conductive layer, and 3
is a resistor, 4 is a power source for applying a driving voltage, 5 is an electrode, 5a, 5b, 5c, 5d are detection electrodes, 6a,
6b, 6c, 6d are detection resistors, 7a, 7b, 7
c and 7d are switches, 8, 8a and 8b are constant current sources, 9a and 9b are operational amplifiers, 10a and 10b are sampling and hold circuits, 11 is a detection control circuit, 24 is a comparison circuit, 25 is a reference power supply, and 26 is a detection circuit. In the determination unit, 100 is an input position, and 101 is an electric pen.
Claims (1)
平面状の抵抗体を有する入力面と、前記抵抗体の
４辺に各々設けられた検出電極と、前記検出電極
と前記抵抗体の圧力が加えられた位置との間に駆
動電圧を印加し前記電流を供給する駆動電圧印加
用電源と、前記駆動電圧の印加により前記検出電
極に流れる電流を一定化する２個の定電流源と、
前記４辺に接続された前記検出電極のうち対向す
る２個の検出電極にそれぞれ前記定電流源を接続
するように切りかえるスイツチと、このスイツチ
の切りかえに応じ前記対向する検出電極間の電位
差をそれぞれ検出する２個の演算回路を具備した
ことを特徴とする座標検出装置。 ２ 入力面は、平面状の抵抗体と駆動電圧印加用
電気ペンとからなることを特徴とする特許請求の
範囲第１項記載の座標検出装置。[Scope of Claims] 1. An input surface having a planar resistor to which a current is supplied from a position where pressure is applied; a detection electrode provided on each of the four sides of the resistor; A driving voltage applying power source that applies a driving voltage between the resistor and the position where the pressure is applied and supplies the current, and two constants that constant the current flowing to the detection electrode by applying the driving voltage. a current source;
a switch that connects the constant current source to two opposing detection electrodes among the detection electrodes connected to the four sides; and a potential difference between the opposing detection electrodes in response to switching of the switch. A coordinate detection device characterized by comprising two arithmetic circuits for detection. 2. The coordinate detection device according to claim 1, wherein the input surface includes a planar resistor and an electric pen for applying a driving voltage.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59262965A JPS61141025A (en) | 1984-12-14 | 1984-12-14 | Coordinate detector |
| US06/798,231 US4752655A (en) | 1984-11-16 | 1985-11-14 | Coordinate input device |
| DE8585402221T DE3585665D1 (en) | 1984-11-16 | 1985-11-15 | COORDINATE INPUT DEVICE. |
| EP19850402221 EP0182715B1 (en) | 1984-11-16 | 1985-11-15 | Coordinate input device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59262965A JPS61141025A (en) | 1984-12-14 | 1984-12-14 | Coordinate detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61141025A JPS61141025A (en) | 1986-06-28 |
| JPH0113124B2 true JPH0113124B2 (en) | 1989-03-03 |
Family
ID=17383005
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59262965A Granted JPS61141025A (en) | 1984-11-16 | 1984-12-14 | Coordinate detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61141025A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0287219A (en) * | 1988-09-22 | 1990-03-28 | Sanyo Electric Co Ltd | Plotting picture input device |
| US9665204B2 (en) * | 2013-10-04 | 2017-05-30 | Microchip Technology Incorporated | Continuous circle gesture detection for a sensor system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58134377A (en) * | 1982-02-05 | 1983-08-10 | Nec Corp | Coordinate input device |
| JPS58134376A (en) * | 1982-02-05 | 1983-08-10 | Nec Corp | Coordinate input device |
-
1984
- 1984-12-14 JP JP59262965A patent/JPS61141025A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58134377A (en) * | 1982-02-05 | 1983-08-10 | Nec Corp | Coordinate input device |
| JPS58134376A (en) * | 1982-02-05 | 1983-08-10 | Nec Corp | Coordinate input device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61141025A (en) | 1986-06-28 |
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