JPH06222873A - Tablet device - Google Patents
Tablet deviceInfo
- Publication number
- JPH06222873A JPH06222873A JP861993A JP861993A JPH06222873A JP H06222873 A JPH06222873 A JP H06222873A JP 861993 A JP861993 A JP 861993A JP 861993 A JP861993 A JP 861993A JP H06222873 A JPH06222873 A JP H06222873A
- Authority
- JP
- Japan
- Prior art keywords
- electrode
- ground
- electrodes
- switch
- switches
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、指示具の位置を検出
し、位置データを得るタブレット装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tablet device for detecting the position of a pointing device and obtaining position data.
【０００２】[0002]
【従来の技術】操作者が、入力面上の位置を指示具（指
やペン等）により指定して、その指定位置を検出するタ
ブレット装置には様々な方法がすでに存在している。そ
の中で指示具とタブレット入力面の電極との間の容量結
合を用いる方法がある。この容量結合を用いる方式とし
ては、例えば特開昭６０−１７１５２１や特公平３−６
８４１１などにより示されるものがある。容量結合方式
の一つの例の概要を以下に示す（図２参照）。2. Description of the Related Art Various methods already exist for a tablet device in which an operator specifies a position on an input surface with a pointing tool (finger, pen, etc.) and detects the specified position. Among them, there is a method of using capacitive coupling between the indicator and the electrode on the tablet input surface. Examples of the method using this capacitive coupling include, for example, JP-A-60-171521 and Japanese Patent Publication No. 3-6.
8411 and the like. An outline of one example of the capacitive coupling method is shown below (see FIG. 2).
【０００３】入力面９１にはＸ軸方向の位置を検出する
ための検出電極９２Ｘと、Ｙ軸方向の位置を検出するた
めの検出電極９２Ｙが、それぞれ多数本、平行に配置さ
れている。通常これらの電極は１枚もしくは２枚の絶縁
基板上に付設され、検出電極は９２Ｘと９２Ｙは上下に
ずれた位置関係にある。検出電極９２Ｘ、９２Ｙにはそ
れぞれスイッチ９３Ｘ、９３Ｙが接続され、電極９２Ｘ
および９２Ｙの各々を信号測定部９８またはグランドの
いずれかに選択接続できるようになっている。A large number of detection electrodes 92X for detecting the position in the X-axis direction and a plurality of detection electrodes 92Y for detecting the position in the Y-axis direction are arranged in parallel on the input surface 91. Usually, these electrodes are provided on one or two insulating substrates, and the detection electrodes 92X and 92Y are vertically displaced. Switches 93X and 93Y are connected to the detection electrodes 92X and 92Y, respectively.
And 92Y can be selectively connected to either the signal measuring unit 98 or the ground.
【０００４】位置指示のためのペン９６は信号源９７を
接続しており、ペン９６と検出電極９２Ｘ、９２Ｙが容
量的に結合することによって、信号源９７で発生した信
号を検出電極９２Ｘ、９２Ｙを経由して信号測定部９８
で測定する。スイッチ９３Ｘ、９３Ｙは電極９２Ｘ、９
２Ｙのうちの１本ないしは複数本を順次選択し、該当す
る電極で受けた信号を後段の信号測定部９８で測定す
る。ペン９６と測定を行う電極との距離によって検出信
号の強度が変わることより、ペン９６の位置を求めるこ
とができる。電極９２Ｘ、９２Ｙのうち、非選択の電極
はスイッチ９３Ｘ、９３Ｙによってグランドに接続さ
れ、電極間の容量的な結合に起因する隣接電極からのノ
イズの廻り込みなどを抑制するようにしている。A pen 96 for indicating a position is connected to a signal source 97, and the pen 96 and the detection electrodes 92X and 92Y are capacitively coupled to each other so that the signal generated by the signal source 97 is detected by the detection electrodes 92X and 92Y. Via the signal measuring unit 98
To measure. The switches 93X and 93Y have electrodes 92X and 9Y, respectively.
One or a plurality of 2Ys are sequentially selected, and the signal received by the corresponding electrode is measured by the signal measuring unit 98 in the subsequent stage. The position of the pen 96 can be determined by changing the intensity of the detection signal depending on the distance between the pen 96 and the electrode for measurement. Of the electrodes 92X and 92Y, the non-selected electrode is connected to the ground by the switches 93X and 93Y so as to suppress sneaking of noise from adjacent electrodes due to capacitive coupling between the electrodes.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、タブレ
ットを液晶ディスプレイ等に重ねて用いる透明タブレッ
トを構成する場合には、電極はＩＴＯや酸化すずなどの
透明電極を用いるため抵抗値が金属導体に比べはるかに
高い。したがって、電極の、スイッチに近い側に比べ
て、遠い側ではグランドに対して高抵抗を介して接続し
ていることになり、グランドに接続することの効果が落
ちてしまう。例として、図４の模式図の場合を示す。電
極２Ａは信号測定部８に接続されている。電極２Ｂは測
定を行っていない電極であり、その片端の点ｂ側でグラ
ンドに接続されている。電極２Ｂにノイズが入った場
合、グランドに接続している端である点ｂ近傍ではノイ
ズはグランドに容易に吸収される。しかしグランドに接
続している側とは反対側の点ａでは、電極が大きな抵抗
を持つためにノイズがグランドに流れ込みにくくなる。
このノイズが電極間の容量的結合によって電極２Ａに廻
り込み、位置検出に悪影響を及ぼす。タブレット装置内
や周辺の機器などからのノイズなどの影響の他に、ペン
からの信号が測定を行う電極以外の電極に入り込み、電
極間の結合によって測定電極に廻り込むような場合も、
位置検出に悪影響を与える。ペンからの信号が電極間結
合によって伝播した場合、その伝播量は隣接し合う各電
極間に対して一定ではないため、誤差成分となって位置
検出精度を低下させる。However, when a transparent tablet is used by stacking the tablet on a liquid crystal display or the like, since the electrode uses a transparent electrode such as ITO or tin oxide, the resistance value is far higher than that of a metal conductor. Very expensive. Therefore, as compared with the side closer to the switch, the electrode is connected to the ground via the high resistance on the far side, and the effect of connecting to the ground is reduced. As an example, the case of the schematic diagram of FIG. 4 is shown. The electrode 2A is connected to the signal measuring unit 8. The electrode 2B is an electrode for which measurement is not performed, and is connected to the ground at the point b side at one end thereof. When noise enters the electrode 2B, the noise is easily absorbed by the ground near the point b which is the end connected to the ground. However, at the point a on the side opposite to the side connected to the ground, it is difficult for noise to flow into the ground because the electrode has a large resistance.
This noise circulates to the electrode 2A due to capacitive coupling between the electrodes and adversely affects the position detection. In addition to the influence of noise from the tablet device and peripheral devices, etc., when the signal from the pen enters electrodes other than the electrode that performs the measurement and wraps around the measurement electrode due to coupling between the electrodes,
It adversely affects the position detection. When the signal from the pen propagates due to the coupling between the electrodes, the amount of propagation is not constant between the adjacent electrodes, so that it becomes an error component and reduces the position detection accuracy.
【０００６】本発明は、上記のような問題点を解決する
ものであり、前述のノイズ等の影響を低減することを目
的としているものである。The present invention is intended to solve the above-mentioned problems, and it is an object of the present invention to reduce the influence of the above-mentioned noise and the like.
【０００７】[0007]
【課題を解決するための手段】本発明のタブレット装置
は、入力面に多数の電極が平行に配置され、前記電極と
指示具との容量的な結合を用いて、前記指示具の位置検
出を行うタブレット装置において、グランドとの接続、
非接続を切り替えるスイッチを、前記電極の両端に接続
したことを特徴とする。In the tablet device of the present invention, a large number of electrodes are arranged in parallel on an input surface, and the position of the pointing device is detected by using capacitive coupling between the electrodes and the pointing device. In the tablet device to do, connect to the ground,
A switch for switching non-connection is connected to both ends of the electrode.
【０００８】[0008]
【実施例】図１は、本発明の実施例の構成を示した図で
ある。DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a diagram showing the configuration of an embodiment of the present invention.
【０００９】タブレット入力面１にはＸ軸検出用電極２
ＸとＹ軸検出用電極２Ｙが配置されている。電極２Ｘと
２Ｙは、１枚の絶縁基板（ガラス板等）の表と裏とに配
置されるか、あるいは２枚の絶縁基板の１枚に電極２
Ｘ、もう１枚に電極２Ｙを設けて２枚の絶縁基板を重ね
合わせて構成される。電極２Ｘと２Ｙは上下にずれた関
係で配置され、本実施例では、Ｘ軸検出用電極２ＸがＹ
軸検出用電極の下側に位置しているとする。電極２Ｘ、
２Ｙは互いに絶縁されており、また位置指示を行うペン
６をタブレット入力面１に接触させた場合でも電極２
Ｘ、２Ｙとペン６は絶縁されるように、入力面１の最上
層に絶縁物（ガラス板、樹脂膜等）を配置する、あるい
はペン６の先端を絶縁物で覆うなどの構成をとる。Ｘ軸
検出用電極２Ｘの片端には信号測定部８との接続、非接
続を切り替えるスイッチ３Ｘが設けられ、またこれとは
別に電極２Ｘの両端にグランドとの接続、非接続を切り
替えるスイッチ４Ｘが設けられている。またＹ軸に関し
ても同様にして、Ｙ軸検出用電極２Ｙの片端には信号測
定部８との接続、非接続を切り替えるスイッチ３Ｙが設
けられ、またこれとは別に電極２Ｙの両端にグランドと
の接続、非接続を切り替えるスイッチ４Ｙが設けられて
いる。The X-axis detection electrode 2 is provided on the tablet input surface 1.
The X and Y axis detection electrodes 2Y are arranged. The electrodes 2X and 2Y are arranged on the front and back of one insulating substrate (glass plate or the like), or the electrode 2 is formed on one of the two insulating substrates.
X, another electrode 2Y is provided, and two insulating substrates are superposed. The electrodes 2X and 2Y are arranged in a vertically offset relationship, and in the present embodiment, the X-axis detection electrode 2X is Y.
It is assumed that it is located below the axis detection electrode. Electrode 2X,
2Y are insulated from each other, and even when the pen 6 for indicating the position is brought into contact with the tablet input surface 1, the electrode 2
In order to insulate the X, 2Y and the pen 6 from each other, an insulator (glass plate, resin film, etc.) is arranged on the uppermost layer of the input surface 1, or the tip of the pen 6 is covered with the insulator. A switch 3X for switching between connection and non-connection with the signal measuring unit 8 is provided at one end of the X-axis detection electrode 2X, and a switch 4X for switching between connection and non-connection with the ground is provided at both ends of the electrode 2X. It is provided. Similarly for the Y-axis, a switch 3Y for switching between connection and disconnection with the signal measuring unit 8 is provided at one end of the Y-axis detecting electrode 2Y. A switch 4Y for switching between connection and non-connection is provided.
【００１０】位置指示を行うペン６は信号源７に接続さ
れる。ペン６をタブレット入力面１に近接または接触さ
せると、信号源７の信号が、ペン６と電極２Ｘまたは電
極２Ｙとの容量的な結合によって、電極２Ｘまたは電極
２Ｙで受けられる。位置検出は、スイッチ３Ｘ、３Ｙを
切り替えて、測定する電極を順次選択して電極測定部８
と接続し、行う。このときの各スイッチの動作の例を図
３に示す。ここでは電極２Ｘ、２Ｙの１つ１つを順に２
Ｘ−１、２Ｘ−２、２Ｘ−３・・・、２Ｙ−１、２Ｙ−
２、２Ｙ−３・・・、というように表示し、そして例え
ば電極２Ｘ−１に接続されているスイッチが３Ｘ−１と
４Ｘ−１となるようにして、スイッチ３Ｘ、３Ｙ、４
Ｘ、４Ｙもこれに準じて表示するものとする。A pen 6 for indicating a position is connected to a signal source 7. When the pen 6 is brought close to or in contact with the tablet input surface 1, the signal of the signal source 7 is received by the electrode 2X or the electrode 2Y by the capacitive coupling between the pen 6 and the electrode 2X or the electrode 2Y. For position detection, the switches 3X and 3Y are switched to sequentially select electrodes to be measured, and the electrode measuring unit 8 is selected.
Connect and do. An example of the operation of each switch at this time is shown in FIG. Here, each of the electrodes 2X and 2Y is sequentially set to 2
X-1, 2X-2, 2X-3 ..., 2Y-1, 2Y-
2, 2Y-3 ..., And, for example, the switches connected to the electrode 2X-1 are 3X-1 and 4X-1, so that the switches 3X, 3Y, 4
X and 4Y are also displayed according to this.
【００１１】Ｘ軸の位置検出において、まず２Ｘ−１の
電極で測定を行うため、スイッチ３Ｘ−１をオンにして
信号測定部８に接続し、スイッチ４Ｘ−１はオフにす
る。測定を行う２Ｘ−１以外のＸ軸検出用電極２Ｘ−
２、２Ｘ−３・・・については信号測定部８とは非接続
とするために、スイッチ３Ｘ−２、３Ｘ−３・・・はオ
フにする。また余計なノイズ等が測定電極２Ｘ−１には
入り込まないようにするために、スイッチ４Ｘ−２、４
Ｘ−３・・・はグランドと接続するためオンにする。こ
れによって電極２Ｘ−２、２Ｘ−３・・・は電極の両端
からグランドに接続されることになる。In the X-axis position detection, since the measurement is performed with the 2X-1 electrode, the switch 3X-1 is turned on and connected to the signal measuring section 8, and the switch 4X-1 is turned off. X-axis detection electrode 2X- other than 2X-1 for measurement
The switches 2X-2, 3X-3, ... Are turned off so that the signals 2, 2X-3, ... Are not connected to the signal measuring unit 8. Further, in order to prevent unnecessary noise and the like from entering the measurement electrode 2X-1, the switches 4X-2, 4
X-3 ... is turned on because it is connected to the ground. As a result, the electrodes 2X-2, 2X-3, ... Are connected to the ground from both ends of the electrodes.
【００１２】電極２Ｘ−１での測定を終えたら、次に２
Ｘ−２を選択して測定を行うため、スイッチ３Ｘ−２を
オンにして信号測定部８に接続し、スイッチ４Ｘ−２は
オフにする。そして測定を行っていない電極２Ｘ−１、
２Ｘ−３・・・については、スイッチ３Ｘ−１、３Ｘ−
３・・・はオフにし、スイッチ４Ｘ−１、４Ｘ−３・・
・はグランドと接続するためオンにする。After the measurement at the electrode 2X-1 is completed,
In order to select and measure X-2, the switch 3X-2 is turned on and connected to the signal measuring unit 8, and the switch 4X-2 is turned off. And the electrode 2X-1, which is not measured,
For 2X-3 ..., switches 3X-1, 3X-
3 ... is turned off, and switches 4X-1, 4X-3 ...
• is turned on to connect to ground.
【００１３】このようにして測定を行う電極を順次選択
していって一連のＸ軸の位置検出に関するペンと電極と
の容量結合の量を計り、位置算出に供する。そして測定
を行わない電極は、電極の両端からグランドに接続して
余計なノイズ等が測定を行う電極に廻り込まないように
する。In this way, the electrodes to be measured are sequentially selected, and the amount of capacitive coupling between the pen and the electrodes for the series of X-axis position detection is measured and used for position calculation. Then, the electrode not to be measured is connected to the ground from both ends of the electrode so that unnecessary noise or the like does not get around to the electrode to be measured.
【００１４】Ｘ軸の位置検出を行っているとき、Ｙ軸検
出用電極２Ｙ−１、２Ｙ−２、２Ｙ−３・・・について
は、ペン６からの信号が効率よくＸ軸検出用電極２Ｘで
受けられるように、フロートの状態にしておく。したが
ってスイッチ３Ｙ−１、３Ｙ−２、３Ｙ−３・・・およ
び４Ｙ−１、４Ｙ−２、４Ｙ−３・・・はすべてオフの
状態にしておく。ただし、Ｘ軸検出用電極２ＸとＹ軸検
出用電極２Ｙの距離が接近してＹ軸検出用電極２Ｙから
のノイズの廻り込みの影響がある場合には、Ｙ軸検出用
電極２Ｙはグランドに接続した方がよいこともある。When the position of the X-axis is being detected, the signals from the pen 6 for the Y-axis detecting electrodes 2Y-1, 2Y-2, 2Y-3, ... Leave it floating so that you can receive it at. Therefore, the switches 3Y-1, 3Y-2, 3Y-3, ... And 4Y-1, 4Y-2, 4Y-3 ,. However, when the distance between the X-axis detection electrode 2X and the Y-axis detection electrode 2Y is short and there is an influence of noise sneaking from the Y-axis detection electrode 2Y, the Y-axis detection electrode 2Y is grounded. Sometimes it is better to connect.
【００１５】Ｙ軸の位置検出も、Ｘ軸の場合と同様にし
て行い、例えば、２Ｙ−１の電極で測定を行うときは、
スイッチ３Ｙ−１をオンにして信号測定部８に接続し、
スイッチ４Ｙ−１はオフにする。測定を行う２Ｙ−１以
外のＹ軸検出用電極２Ｙ−２、２Ｙ−３・・・について
は信号測定部８とは非接続とするために、スイッチ３Ｙ
−２、３Ｙ−３・・・はオフにする。電極２Ｙ−２、２
Ｙ−３・・・は電極の両端からグランドに接続させるた
めに、スイッチ４Ｙ−２、４Ｙ−３・・・はオンにす
る。そして測定を行う電極を順次選択していって一連の
Ｙ軸の位置検出に関するペンと電極との容量結合の量を
測定していく。The Y-axis position detection is performed in the same manner as in the case of the X-axis. For example, when measuring with 2Y-1 electrodes,
Turn on the switch 3Y-1 to connect to the signal measuring unit 8,
The switch 4Y-1 is turned off. With respect to the Y-axis detection electrodes 2Y-2, 2Y-3, ... Other than the measurement 2Y-1, the switch 3Y is used in order to disconnect from the signal measuring unit 8.
-2, 3Y-3 ... are turned off. Electrodes 2Y-2, 2
The switches 4Y-2, 4Y-3, ... Are turned on in order to connect both ends of the electrodes to the ground. Then, the electrodes to be measured are sequentially selected to measure the amount of capacitive coupling between the pen and the electrodes for a series of Y-axis position detection.
【００１６】ここでＹ軸の位置検出を行う際に、Ｘ軸検
出用電極２Ｘ−１、２Ｘ−２、２Ｘ−３・・・について
は、グランドに接続した方がよい場合が多い。タブレッ
トの下面にディスプレイ装置を設置する形態をとる場合
に、ディスプレイ装置からのノイズの影響を低減する意
味でグランドに接続する。したがってスイッチ３Ｘ−
１、３Ｘ−２、３Ｘ−３・・・および４Ｘ−１、４Ｘ−
２、４Ｘ−３・・・はすべてオンの状態にしておく。When the position of the Y-axis is detected, it is often better to connect the X-axis detecting electrodes 2X-1, 2X-2, 2X-3 ... To the ground. When the display device is installed on the lower surface of the tablet, it is connected to the ground to reduce the influence of noise from the display device. Therefore, switch 3X-
1, 3X-2, 3X-3 ... and 4X-1, 4X-
2, 4X-3 ... are all turned on.
【００１７】なおここでは、電極を１本ずつ選択して測
定する場合について説明したが、電極を複数同時に選択
して測定する場合についても同様に行うことができ、測
定を行わない非選択の電極はグランドに接続すればよ
い。Although the case where the electrodes are selected one by one and measured is described here, the same can be applied to the case where a plurality of electrodes are simultaneously selected and measured, and non-selected electrodes not to be measured. Should be connected to ground.
【００１８】電極の両側からグランドへ接続可能とした
ことで、図５に示されるように測定を行っていない電極
２Ｂで受けたノイズは、従来例の図４の場合に比べグラ
ンドに吸収されやすくなり、相対的に、測定を行う電極
にノイズが廻り込む量は減少する。電極１本の両端間の
抵抗値をＲとすると、従来例の図４では、電極２Ｂのグ
ランドと接続している端と反対側の点ａから、グランド
までの抵抗値はＲであるが、本実施例の図５において
は、最悪の場合でも電極の中央の点ｃ’からグランドま
での抵抗値は、Ｒ／２が並列になっていると考えられる
のでＲ／４となり、グランドと接続する効果が大きくな
っている。Since both sides of the electrode can be connected to the ground, noise received by the electrode 2B which is not measured as shown in FIG. 5 is more easily absorbed by the ground than in the case of FIG. 4 of the conventional example. Therefore, the amount of noise that circulates around the electrodes to be measured is relatively reduced. If the resistance value between both ends of one electrode is R, in FIG. 4 of the conventional example, the resistance value from the point a on the side opposite to the end connected to the ground of the electrode 2B to the ground is R, In FIG. 5 of the present embodiment, even in the worst case, the resistance value from the point c ′ at the center of the electrode to the ground is R / 4 because it is considered that R / 2 is in parallel, and the resistance value is connected to the ground. The effect is increasing.
【００１９】なお、本実施例では、ペンを信号の送信
側、電極を受信側にした場合について記述したが、本発
明はこの場合に限定されるものではない。例えば、電極
を送信側として、信号源をスイッチによって順次電極に
接続し、ペンは受信側にして、ペンに信号測定部を接続
する構成にしてもよい。この場合においても電極間をノ
イズが伝播することを低減する効果はある。また図１に
おいてペン６は信号源７を経てグランドに接続されてい
るが、ペン６の内部に信号源７を持ち、ペン６の筐体を
仮想的なグランドとして用いる、コードレスタイプのペ
ンにしても良い。In this embodiment, the case where the pen is the signal transmitting side and the electrode is the receiving side has been described, but the present invention is not limited to this case. For example, the electrodes may be on the transmitting side, the signal source may be sequentially connected to the electrodes by a switch, the pen may be on the receiving side, and the signal measuring unit may be connected to the pen. Even in this case, there is an effect of reducing the propagation of noise between the electrodes. Although the pen 6 is connected to the ground via the signal source 7 in FIG. 1, it is a cordless type pen that has the signal source 7 inside the pen 6 and uses the housing of the pen 6 as a virtual ground. Is also good.
【００２０】[0020]
【発明の効果】本発明によれば、電極の両端にスイッチ
を設け、電極の両端からグランドに接続可能としたの
で、電極上の任意の点とグランド間の抵抗が減少する。
したがって、測定を行う電極の周辺の、測定を行ってい
ない電極にノイズが入った場合に、ノイズをグランドに
吸収しやすくなり、測定を行う電極へのノイズの廻り込
みを減少させる効果がある。According to the present invention, the switches are provided at both ends of the electrode so that the both ends of the electrode can be connected to the ground, so that the resistance between any point on the electrode and the ground is reduced.
Therefore, when noise is introduced into an electrode that is not being measured around the electrode that is being measured, it is easy to absorb the noise in the ground, and this has the effect of reducing the sneak of the noise to the electrode that is being measured.
【図１】本発明の実施例の構成を示した図。FIG. 1 is a diagram showing a configuration of an exemplary embodiment of the present invention.
【図２】従来例の構成を示す図。FIG. 2 is a diagram showing a configuration of a conventional example.
【図３】実施例のスイッチの動作を示したタイムチャー
ト。FIG. 3 is a time chart showing the operation of the switch of the embodiment.
【図４】従来例のノイズの伝播を示した模式図。FIG. 4 is a schematic diagram showing noise propagation in a conventional example.
【図５】実施例のノイズの伝播を示した模式図。FIG. 5 is a schematic diagram showing the propagation of noise in the example.
１…タブレット入力面 ２Ｘ…Ｘ軸検出用電極 ２Ｙ…Ｙ軸検出用電極 ３Ｘ、３Ｙ、４Ｘ、４Ｙ…スイッチ ６…ペン ７…信号源 ８…信号測定部 1 ... Tablet input surface 2X ... X-axis detecting electrode 2Y ... Y-axis detecting electrode 3X, 3Y, 4X, 4Y ... Switch 6 ... Pen 7 ... Signal source 8 ... Signal measuring unit
Claims (1)
前記電極と指示具との容量的な結合を用いて、前記指示
具の位置検出を行うタブレット装置において、グランド
との接続、非接続を切り替えるスイッチを、前記電極の
両端に接続したことを特徴とするタブレット装置。1. A large number of electrodes are arranged in parallel on an input surface,
In a tablet device that detects the position of the pointing device by using capacitive coupling between the electrode and the pointing device, a switch for switching between connection and disconnection with the ground is connected to both ends of the electrode. Tablet device to do.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP00861993A JP3438245B2 (en) | 1993-01-21 | 1993-01-21 | Tablet device, device using the same, and position detection method of pointing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP00861993A JP3438245B2 (en) | 1993-01-21 | 1993-01-21 | Tablet device, device using the same, and position detection method of pointing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06222873A true JPH06222873A (en) | 1994-08-12 |
| JP3438245B2 JP3438245B2 (en) | 2003-08-18 |
Family
ID=11697964
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP00861993A Expired - Lifetime JP3438245B2 (en) | 1993-01-21 | 1993-01-21 | Tablet device, device using the same, and position detection method of pointing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3438245B2 (en) |
Cited By (9)
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|---|---|---|---|---|
| JP2009175784A (en) * | 2008-01-21 | 2009-08-06 | Mitsubishi Electric Corp | Touch panel device |
| WO2010137727A1 (en) * | 2009-05-29 | 2010-12-02 | Sony Corporation | Touch sensor display and electronic device |
| KR101133493B1 (en) * | 2010-02-09 | 2012-04-10 | 주식회사 지니틱스 | TOUCH PAD AND MUlTI-TOUCH RECOGNITION METHOD USING THE SAME |
| WO2012169454A1 (en) * | 2011-06-08 | 2012-12-13 | シャープ株式会社 | Coordinate location detection device |
| JP2013501291A (en) * | 2009-08-06 | 2013-01-10 | ビンステッド，ロナルド，ピーター | Touch sensor |
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-
1993
- 1993-01-21 JP JP00861993A patent/JP3438245B2/en not_active Expired - Lifetime
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009175784A (en) * | 2008-01-21 | 2009-08-06 | Mitsubishi Electric Corp | Touch panel device |
| WO2010137727A1 (en) * | 2009-05-29 | 2010-12-02 | Sony Corporation | Touch sensor display and electronic device |
| CN102112951A (en) * | 2009-05-29 | 2011-06-29 | 索尼公司 | Touch sensor, display and electronic device |
| US10082923B2 (en) | 2009-05-29 | 2018-09-25 | Japan Display Inc. | Touch sensor, display and electronic device |
| US9927925B2 (en) | 2009-05-29 | 2018-03-27 | Japan Display Inc. | Touch sensor, display and electronic device using a timing control signal |
| JP2013501291A (en) * | 2009-08-06 | 2013-01-10 | ビンステッド，ロナルド，ピーター | Touch sensor |
| KR101133493B1 (en) * | 2010-02-09 | 2012-04-10 | 주식회사 지니틱스 | TOUCH PAD AND MUlTI-TOUCH RECOGNITION METHOD USING THE SAME |
| EP2385449A3 (en) * | 2010-05-04 | 2014-11-05 | TPK Touch Solutions (Xiamen) Inc. | Capacitive touch panel, manufacturing method and scanning method |
| EP2515212A3 (en) * | 2011-04-18 | 2013-06-26 | Samsung Display Co., Ltd. | Touch screen system and method of driving the same |
| US9367168B2 (en) | 2011-04-18 | 2016-06-14 | Samsung Display Co., Ltd. | Touch screen system and method of driving the same |
| JPWO2012169454A1 (en) * | 2011-06-08 | 2015-02-23 | シャープ株式会社 | Coordinate position detector |
| WO2012169454A1 (en) * | 2011-06-08 | 2012-12-13 | シャープ株式会社 | Coordinate location detection device |
| US8860692B2 (en) | 2012-03-23 | 2014-10-14 | Zinitix Co., Ltd. | Touch pad and method for detecting multi-touch using the same |
| CN105930010A (en) * | 2016-05-11 | 2016-09-07 | 华勤通讯技术有限公司 | Wiring method of sensor of touch screen and sensor of touch screen |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3438245B2 (en) | 2003-08-18 |
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