JP4435622B2 - Capacitance type detection device - Google Patents

Capacitance type detection device Download PDF

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JP4435622B2
JP4435622B2 JP2004154187A JP2004154187A JP4435622B2 JP 4435622 B2 JP4435622 B2 JP 4435622B2 JP 2004154187 A JP2004154187 A JP 2004154187A JP 2004154187 A JP2004154187 A JP 2004154187A JP 4435622 B2 JP4435622 B2 JP 4435622B2
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detection device
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type detection
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JP2005337773A (en
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忠満 佐藤
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Alps Alpine Co Ltd
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Alps Electric Co Ltd
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • G06F3/0418—Control or interface arrangements specially adapted for digitisers for error correction or compensation, e.g. based on parallax, calibration or alignment
    • G06F3/04182—Filtering of noise external to the device and not generated by digitiser components
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0445—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0446—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04107—Shielding in digitiser, i.e. guard or shielding arrangements, mostly for capacitive touchscreens, e.g. driven shields, driven grounds

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
  • Position Input By Displaying (AREA)

Description

本発明は、タッチパネルやグライドポイントに使用される静電容量式の検出装置に係わり、特にセンシング領域以外からの影響を受け難くして検出精度を高めるようにした静電容量式の検出装置に関する。   The present invention relates to a capacitance-type detection device used for a touch panel or a glide point, and more particularly to a capacitance-type detection device that is less susceptible to influences from outside the sensing region and increases detection accuracy.

静電容量式の検出装置に関連する先行技術としては、例えば以下の特許文献１に示すようなパッド型のポインティングデバイスが存在する。 As a prior art related to a capacitance type detection apparatus, for example, there is a pad type pointing device as shown in Patent Document 1 below.

特許文献１では、フィルム基板１０の下面にＸ方向に延びるとともにＹ方向に所定の間隔で配置された複数のＸ電極ｘ１，ｘ２，…，ｘ１５，ｘ１６からなるはＸ電極層２０Ｘが設けられ、このＸ電極層２０Ｘの表面（下面）に絶縁膜１２が形成され、さらに前記絶縁膜１２の表面（下面）にＹ方向に延びるとともにＸ方向に所定の間隔で配置された複数のＹ電極ｙ１，ｙ２，…，ｙ１５，ｙ１６からなるＹ電極層２０Ｙが形成されている。すなわち、前記Ｘ電極層２０ＸとＹ電極層２０Ｙとが絶縁膜１２を介して互いに直交するマトリック状に対向配置された状態でフィルム基板１０の下面に設けられている。   In Patent Document 1, an X electrode layer 20X comprising a plurality of X electrodes x1, x2,..., X15, x16 extending in the X direction and arranged at predetermined intervals in the Y direction is provided on the lower surface of the film substrate 10, An insulating film 12 is formed on the surface (lower surface) of the X electrode layer 20X, and a plurality of Y electrodes y1, extending in the Y direction on the surface (lower surface) of the insulating film 12 and arranged at predetermined intervals in the X direction. A Y electrode layer 20Y made of y2,..., y15, y16 is formed. In other words, the X electrode layer 20X and the Y electrode layer 20Y are provided on the lower surface of the film substrate 10 so as to face each other in a matrix form orthogonal to each other with the insulating film 12 interposed therebetween.

前記Ｙ電極ｙ１，ｙ２，…，ｙ１５，ｙ１６およびＸ電極ｘ１，ｘ２，…，ｘ１５，ｘ１６は前記絶縁膜１２の縁部に設けられたスルーホール、接点および電極などを介して引き出されており、最終的にはフィルム基板１０の延長部１１の端部Ｄsに集められ、そこから制御基板回路４の導電部５に接続されている。
特開２００３−９９１８５号公報 The Y electrodes y 1, y 2,..., Y 15, y 16 and the X electrodes x 1, x 2,. Finally, they are collected at the end portion Ds of the extension portion 11 of the film substrate 10 and connected to the conductive portion 5 of the control substrate circuit 4 therefrom.
JP 2003-99185 A

前記静電容量式の検出装置は、指などの被検出体を前記Ｘ電極層およびＹ電極層に接近させたときに、前記被検出体と各Ｘ電極の間、および前記被検出体と各Ｙ電極との間に形成される静電容量の変化を検出することにより、前記被検出体のＸ、Ｙ方向の位置を検知するものである。   The capacitance type detection device is configured such that when a detected object such as a finger is brought close to the X electrode layer and the Y electrode layer, the detected object and each X electrode, and the detected object and each By detecting a change in capacitance formed between the Y electrode and the Y electrode, the position of the detected object in the X and Y directions is detected.

したがって、Ｘ、Ｙ方向の検出精度を高めるためには、前記被検出体が各Ｘ、Ｙ電極以外の電極に接近にしたとき、それら電極と被検出体との間に静電容量が形成されないこと、あるいは例え前記静電容量が形成されたとしもその変化量が小さいことが必要である。   Therefore, in order to increase the detection accuracy in the X and Y directions, when the detected object approaches the electrodes other than the X and Y electrodes, no capacitance is formed between the electrodes and the detected object. Or, even if the capacitance is formed, it is necessary that the amount of change is small.

しかし、上記従来の静電容量式の検出装置では、前記Ｙ電極ｙ１，ｙ２，…，ｙ１５，ｙ１６およびＸ電極ｘ１，ｘ２，…，ｘ１５，ｘ１６の端部から引き出され、スルーホールまで延びる引き出し線が、前記Ｙ電極やＸ電極に隣接して配置される構成であるため、前記引き出し線と被検出体との間に静電容量が形成されやすく、しかもその変化量が小さくすることができないため、被検出体のＸ，Ｙ方向の位置検出の精度を高め難いという問題があった。   However, in the above-described conventional electrostatic capacitance type detection device, the drawer is extended from the ends of the Y electrodes y1, y2,..., Y15, y16 and the X electrodes x1, x2,. Since the wire is arranged adjacent to the Y electrode or the X electrode, a capacitance is easily formed between the lead wire and the detection object, and the amount of change cannot be reduced. Therefore, there is a problem that it is difficult to increase the accuracy of detecting the position of the detection target in the X and Y directions.

本発明は上記従来の課題を解決するためのものであり、センシング領域の近傍に引き出し用の延長線などを設けた場合であっても、前記センシング領域以外からの影響を受け難くすることにより、被検出体の座標検出の精度を高めた静電容量式の検出装置を提供する。   The present invention is for solving the above-described conventional problems, and even when a lead-out extension line or the like is provided in the vicinity of the sensing region, by making it less susceptible to influences other than the sensing region, Provided is a capacitance type detection device with improved accuracy of coordinate detection of an object to be detected.

本発明は、被検出体が接触しまたは接近したことを検出するセンシング領域と、前記センシング領域に配線された複数のセンサ電極と、個々のセンサ電極と、前記センシング領域の外部に設けられた外部回路との間を接続する引き回し用の延長線と、前記センシング領域の近傍に設けられるとともに前記延長線が密集配置された引回し領域と、を備えた静電容量式の検出装置において、
前記センシング領域と前記引回し領域とがカバーシートで覆われ、前記カバーシートは、前記センシング領域を覆う部分の厚さ寸法よりも前記引回し領域を覆う部分の厚さ寸法の方が大きく、前記引回し領域を覆う前記カバーシートの表面が、前記センシング領域を覆う前記カバーシートの表面よりも前記延長線から離れる方向へ***して、前記被検出体が前記引回し領域を覆う前記カバーシートの表面に接触しまたは接近したときに、前記被検出体と前記延長線との間に形成される静電容量の変化を抑えることが可能とされており、
前記カバーシートは、前記センシング領域の全体を覆う厚さ寸法の薄い部分と、前記引回し領域の全体を覆う厚さ寸法の厚い部分とが、樹脂材料で一体に形成されていることを特徴とするものである。 The present invention relates to a sensing region for detecting that a detected object is in contact with or approaching, a plurality of sensor electrodes wired to the sensing region, individual sensor electrodes, and an external device provided outside the sensing region. In a capacitance type detection device comprising: an extension line for routing between the circuit; and a routing area provided in the vicinity of the sensing area and the extension lines densely arranged,
The sensing region and said circumventive and area is covered with a cover sheet, the cover sheet is large towards the thickness of the portion covering the circumventive and area than the thickness of the portion covering the sensing area , the surface of the cover sheet covering the circumventive to region, said raised away from the extension line from the surface of the cover sheet covering the sensing area, the detection object is covering the circumventive by region When contacting or approaching the surface of the cover sheet, it is possible to suppress a change in capacitance formed between the detected object and the extension line,
The cover sheet, wherein the total thickness thin dimension portion covering the sensing area, said circumventive a thickness of thick dimension portion to cover the entire region, are integrally formed of a resin material It is what.

また、前記センシング領域と前記引回し領域との間で、前記カバーシートの表面に段差が形成されているものである。 Further , a step is formed on the surface of the cover sheet between the sensing area and the routing area .

なお、前記センサ電極は、Ｘ方向に延びるとともにＹ方向に所定の間隔で配置された複数のＸ電極と、Ｙ方向に延びるとともにＸ方向に所定の間隔で配置された複数のＹ電極とが、互いに直交しながらマトリックス状に対向対置されたものである。   The sensor electrodes include a plurality of X electrodes extending in the X direction and arranged at a predetermined interval in the Y direction, and a plurality of Y electrodes extending in the Y direction and arranged at a predetermined interval in the X direction. They are opposed to each other in a matrix while orthogonal to each other.

本発明の静電容量式の検出装置では、カバーシートのうち引回し領域部分の板厚寸法を厚く形成するようにしたことから、被検出体と引回し領域内に配線される延長線との間の静電結合を遮断し、その間で静電容量が形成され難くすることができる。 In capacitive sensing device of the present invention, since it has to form a thick plate thickness dimension of the lead-out area portion of the cover sheet, the extension line to be wired to the detected body and the lead region The electrostatic coupling between the two can be cut off, and the capacitance can be made difficult to be formed between them.

あるいは、たとえ静電容量が形成されたとしても、被検出体の移動に対する変化量を小さく抑えることができるため、検出精度に与える影響を小さくできる。
すなわち、静電容量式の検出装置としての位置検出精度を高めることができる。 Alternatively, even if the capacitance is formed, the amount of change with respect to the movement of the detection target can be suppressed small, so that the influence on the detection accuracy can be reduced.
That is, the position detection accuracy as a capacitance type detection device can be increased.

図１は静電容量式の検出装置を示す概略構成図、図２は参考例を示すものであり、図１のＩＩ−ＩＩ線における断面図、図３は本発明の実施の形態を示すものであり、図２と同様の断面図である。 FIG. 1 is a schematic configuration diagram showing a capacitance type detection device, FIG. 2 shows a reference example, a sectional view taken along line II-II in FIG. 1, and FIG. 3 shows an embodiment of the present invention. and is a cross-sectional view similar to FIG. 2.

図１に示すように、この静電容量式の検出装置１０はＹ方向に延びるとともにＸ方向に所定の間隔で配置された複数のＸ電極（センサ電極）ｘ１，ｘ２，・・・，ｘｎと、同じくＸ方向に延びるとともにＹ方向に所定の間隔で配置された複数のＹ電極（センサ電極）ｙ１，ｙ２，・・・，ｙｎとを有している。 As shown in FIG. 1, this capacitance type detection device 10 includes a plurality of X electrodes (sensor electrodes) x1, x2,..., Xn extending in the Y direction and arranged at predetermined intervals in the X direction. has also a plurality of Y electrodes arranged at predetermined intervals in the Y-direction extends in the X direction (sensor electrode) y1, y 2, · · ·, and yn.

図２に示すように、前記複数のＸ電極ｘ１，ｘ２，・・・，ｘｎは誘電シート１１の一方の面（表面）に設けられており、前記複数のＹ電極ｙ１，ｙ２，・・・，ｙｎは前記誘電シート１１の他方の面（裏面）に設けられている。すなわち、前記複数のＸ電極ｘ１，ｘ２，・・・，ｘｎと前記複数のＹ電極ｙ１，ｙ２，・・・，ｙｎとは前記誘電シート１１を介して互いに直交するマトリックス状に対向対置されている。このため、前記Ｘ電極ｘ１，ｘ２，・・・，ｘｎと前記複数のＹ電極ｙ１，ｙ２，・・・，ｙｎとの間には静電容量Ｃが形成される。 As shown in FIG. 2, the plurality of X electrodes x1, x2, · · ·, xn is provided on one surface of the dielectric sheet 11 (the surface), the plurality of Y electrodes y1, y 2, · · , Yn are provided on the other surface (back surface) of the dielectric sheet 11. That is, the plurality of X electrodes x1, x2, · · ·, the and xn plurality of Y electrodes y1, y 2, · · ·, via said dielectric sheet 11 is facing opposed to the matrix which are orthogonal to each other and yn ing. Therefore, the X electrodes x1, x2, · · ·, the and xn plurality of Y electrodes y1, y 2, · · ·, the capacitance C is formed between the yn.

前記誘電シート１１の一方の面の上には、前記複数のＸ電極ｘ１，ｘ２，・・・，ｘｎを覆う絶縁膜１２が形成され、同様に前記誘電シート１１の他方の面の下には、前記複数のＹ電極ｙ１，ｙ２，・・・，ｙｎを覆う絶縁膜１３が形成されている。そして、前記絶縁膜１２の上層にはカバーシート１５が固定されており、前記絶縁膜１３の下層には基板１４が固定されている。前記前記絶縁膜１２とカバーシート１５との間の固定、および前記絶縁膜１３と基板１４との固定は接着剤などを用いて行われるが、前記絶縁膜１２，１３自体が接着剤であってもよい。 An insulating film 12 covering the plurality of X electrodes x1, x2,..., Xn is formed on one surface of the dielectric sheet 11, and similarly below the other surface of the dielectric sheet 11. the plurality of Y electrodes y1, y 2, · · ·, insulating film 13 covering the yn is formed. A cover sheet 15 is fixed to the upper layer of the insulating film 12, and a substrate 14 is fixed to the lower layer of the insulating film 13. The insulating film 12 and the cover sheet 15 are fixed and the insulating film 13 and the substrate 14 are fixed using an adhesive or the like. The insulating films 12 and 13 themselves are adhesives. Also good.

前記カバーシート１５は、例えばポリエステル樹脂などで形成されている、その表面（Ｚ１側の面）が指などの被検出体が接触し且つ摺動する操作面１５ａである。前記複数のＸ電極ｘ１，ｘ２，・・・，ｘｎと前記複数のＹ電極ｙ１，ｙ２，・・・，ｙｎとは前記操作面１５ａの下面側の位置にマトリックス状に配置されており、図１に示すようにカバーシート１５が設けられた部分が静電容量式の検出装置のセンシング領域Ａとされている。 The cover sheet 15 is formed of, for example, a polyester resin, and the surface (the surface on the Z1 side) is an operation surface 15a on which a detection object such as a finger contacts and slides. Wherein the plurality of X electrodes x1, x2, ···, said the xn plurality of Y electrodes y1, y 2, ···, are arranged in a matrix on the position of the lower surface side of the operation surface 15a and yn, As shown in FIG. 1, a portion where the cover sheet 15 is provided is a sensing area A of the capacitance type detection device.

図１に示すように前記複数のＸ電極ｘ１，ｘ２，・・・，ｘｎの端部は、センシング領域Ａから図示Ｙ２側の外部にそれぞれ延長線Ｘａとして引き出されている。前記延長線Ｘａは、前記センシング領域Ａに隣接して設けられた引回し領域Ｂｘ内に密集配置されており、前記引回し領域Ｂｘを介してマルチプレクサなどで構成される切換え手段２１Ｘに接続されている。   As shown in FIG. 1, the end portions of the plurality of X electrodes x1, x2,..., Xn are led out from the sensing region A as extensions Xa to the outside on the Y2 side in the drawing. The extension line Xa is densely arranged in a routing area Bx provided adjacent to the sensing area A, and is connected to switching means 21X configured by a multiplexer or the like via the routing area Bx. Yes.

同様に、前記複数のＹ電極ｙ１，ｙ２，・・・，ｙｎの端部は、センシング領域Ａから図示Ｘ２側の外部にそれぞれ延長線Ｙａとして引き出されており、引回し領域Ｂｙを介して切換え手段２１Ｙに接続されている。 Similarly, end portions of the plurality of Y electrodes y1, y 2 ,..., Yn are led out from the sensing area A to the outside on the X2 side in the drawing as extension lines Ya, respectively, through the routing area By. It is connected to the switching means 21Y.

前記一方の切換え手段２１Ｙには発振手段２３に接続されており、この発振手段２３から前記Ｙ電極ｙ１，ｙ２，・・・，ｙｎに対し、所定の電圧を選択的に印加することができるようになっている。また前記他方の切換え手段２１Ｘには増幅手段２４が接続され、その出力がＡ／Ｄ変換手段２５を介して制御手段２６に接続されている。 Said one of the switching means 21Y is connected to the oscillating means 23, said from the oscillating means 23 Y electrodes y1, y 2, · · ·, to yn, it can be selectively apply a predetermined voltage It is like that. An amplifier 24 is connected to the other switching means 21X, and its output is connected to the controller 26 via an A / D converter 25.

前記制御手段２６はＣＰＵを主体として構成されており、前記Ａ／Ｄ変換手段２５からデータを取得するだけでなく、例えば前記切換え手段２１Ｘ，２１Ｙの切り換えのタイミングを設定することができるようになっている。   The control means 26 is composed mainly of a CPU, and can not only acquire data from the A / D conversion means 25 but also set the switching timing of the switching means 21X, 21Y, for example. ing.

前記増幅手段２４は切換え手段２１Ｘに現れる電圧を所定の利得で増幅する機能を有し、またＡ／Ｄ変換手段２５は増幅後の電圧（アナログ値）を所定のサンプリング周期でディジタル値に変換する機能を有している。なお、前記増幅手段２４とＡ／Ｄ変換手段２５との間に不要なノイズを除去するフィルタ手段を設けた構成であってもよい。   The amplification means 24 has a function of amplifying the voltage appearing at the switching means 21X with a predetermined gain, and the A / D conversion means 25 converts the amplified voltage (analog value) into a digital value at a predetermined sampling period. It has a function. In addition, a configuration in which filter means for removing unnecessary noise is provided between the amplifying means 24 and the A / D converting means 25 may be adopted.

上記静電容量式の検出装置の動作について説明する。
制御手段２６は切換え手段２１Ｙと切換え手段２１Ｘとを動作させ、切換え手段２１ＹのスイッチＳＷ１をオンさせてから切換え手段２１Ｘ側のスイッチＳＷ１〜ＳＷｎを順次オンさせる。 The operation of the capacitance type detection device will be described.
The control unit 26 operates the switching unit 21Y and the switching unit 21X, turns on the switch SW1 of the switching unit 21Y, and then sequentially turns on the switches SW1 to SWn on the switching unit 21X side.

発振手段２３から前記Ｙ電極ｙ１，ｙ２，・・・，ｙｎに所定の電圧が入力されると、各Ｙ電極ｙ１，ｙ２，・・・，ｙｎとこれに対向してマトリックス状に配置された各Ｘ電極ｘ１，ｘ２，・・・，ｘｎとの間に誘電束が発生して静電容量Ｃがそれぞれ形成されるため、個々の静電容量Ｃを介して前記Ｘ電極ｘ１，ｘ２，・・・，ｘｎに電圧が印加される。 Wherein the oscillating means 23 Y electrodes y1, y 2, ···, when a predetermined voltage is inputted to yn, each Y electrodes y1, y 2, ···, arranged in a matrix so as to face the to yn A dielectric flux is generated between each of the X electrodes x1, x2,..., Xn and electrostatic capacitances C are formed, so that the X electrodes x1, x2 are passed through the individual electrostatic capacitances C. ,..., Xn are applied with voltages.

ここで、指などの被検出体を前記カバーシート１５の操作面１５ａ上の任意の位置に接触または接近させると、前記誘電束の一部が被検出体に引き抜かれ、被検出体の近傍に位置する前記静電容量が減少させられる。このため、前記静電容量Ｃの一部が変化するため、その変化量に応じた電圧が前記Ｘ電極ｘ１，ｘ２，・・・，ｘｎから検出される。このとき検出される電圧値は、前記被検出体からの距離が近いほど高い電圧値が検出され、距離が遠い電極ほど低い電圧値として検出される。   Here, when a detected object such as a finger is brought into contact with or approached to an arbitrary position on the operation surface 15a of the cover sheet 15, a part of the dielectric bundle is pulled out by the detected object, and in the vicinity of the detected object. The located capacitance is reduced. For this reason, since a part of the capacitance C changes, a voltage corresponding to the change amount is detected from the X electrodes x1, x2,. As for the voltage value detected at this time, a higher voltage value is detected as the distance from the detected object is shorter, and an electrode having a longer distance is detected as a lower voltage value.

各Ｘ電極ｘ１，ｘ２，・・・，ｘｎから出力された電圧は、増幅手段２４を経てＡ／Ｄ変換手段２５に入力され、前記Ａ／Ｄ変換手段２５でデジタルデータＤに変換された後、前記データが制御手段２６に送られる。そして、前記制御手段２６は前記データＤから、被検出体のＹ電極ｙ１上におけるＸ方向の位置を決定する。   The voltages outputted from the X electrodes x1, x2,..., Xn are inputted to the A / D conversion means 25 through the amplification means 24 and converted into digital data D by the A / D conversion means 25. , The data is sent to the control means 26. Then, the control means 26 determines the position in the X direction on the Y electrode y1 of the detected object from the data D.

そして、前記制御手段２６は前記切換え手段２１ＹのスイッチＳＷ２からＳＷｎまでを順次オンさせ、上記同様切換え手段２１Ｙの各スイッチＳＷごとに前記切換え手段２１Ｘ側のスイッチＳＷ１〜ＳＷｎを順次オンさせることにより、前記Ｙ電極ｙ１，ｙ２，・・・，ｙｎと前記Ｘ電極ｘ１，ｘ２，・・・，ｘｎの各交点におけるデータＤを取得する。そして、制御手段２６は、これらのデータＤから前記被検出体の座標位置（座標データ）の決定を行っている。 Then, the control means 26 sequentially turns on the switches SW2 to SWn of the switching means 21Y, and sequentially turns on the switches SW1 to SWn on the switching means 21X side for each switch SW of the switching means 21Y. wherein Y electrodes y1, y 2, ···, the a yn X electrodes x1, x2, ···, obtains data D at each intersection of xn. The control means 26 determines the coordinate position (coordinate data) of the detected object from these data D.

ここで前記図２に示す参考例の検出装置では、前記センシング領域Ａに隣接する引回し領域Ｂｙに、静電防護手段としてのシールド部材３１が設けられている。前記シールド部材３１は磁性材料からなる金属板で形成されており、前記延長線Ｙａを覆うように前記引回し領域Ｂｙの表面に固定されている。 Here, in the detection apparatus of the reference example shown in FIG. 2 , a shield member 31 as an electrostatic protection means is provided in the routing area By adjacent to the sensing area A. The shield member 31 is formed of a metal plate made of a magnetic material, and is fixed to the surface of the routing area By so as to cover the extension line Ya.

前記シールド部材３１は、少なくとも前記被検出体が接近しやすい前記センシング領域Ａの近傍を覆った構成が好ましく、より好ましくは前記Ｙ電極ｙ１，ｙ２，・・・，ｙｎの端部である延長線Ｙａが、センシング領域Ａから外れた位置から前記切換え手段２１Ｙに接続されるまでの間の全長を覆うようにしたものである。なお、さらに優れた効果を期待することができる点では、前記シールド部材３１を接地しておくことが好ましい。 The shield member 31 is at least the preferably configured to cover the vicinity of the object to be detected is close easily the sensing region A, more preferably the Y electrodes y1, y 2, · · ·, the ends of yn extension The line Ya covers the entire length from the position deviating from the sensing area A until it is connected to the switching means 21Y. Note that the shield member 31 is preferably grounded in that a further excellent effect can be expected.

このように、シールド部材３１により延長部Ｙａを覆うことにより、被検出体が引回し領域に接近したときに、前記被検出体と引回し領域Ｂｙに配線されている前記延長線Ｙａとの間に誘電束が発生することがなく、両者の間に静電容量が形成されるのを防止できる。また、例え前記被検出体と各延長線Ｙａとの間に静電容量が形成されることがあるとしても、少なくとも前記被検出体の動きに対する静電容量の変化量を低く抑えることができる。   In this way, by covering the extension portion Ya with the shield member 31, when the detected object approaches the routing area, the area between the detected object and the extension line Ya wired in the routing area By. Thus, no dielectric flux is generated, and it is possible to prevent a capacitance from being formed between the two. Further, even if a capacitance may be formed between the detected object and each extension line Ya, at least the amount of change in the capacitance with respect to the movement of the detected object can be suppressed low.

このため、センシング領域Ａで検出された座標データ、すなわちＸ電極ｘ１，ｘ２，・・・，ｘｎとＹ電極ｙ１，ｙ２，・・・，ｙｎとによって検出された座標データに、引回し領域Ｂｙで発生した電圧が混在するようなことがなく、また混在してもその値を微小とすることができるため、座標データの検出精度を高めることが可能である。 Therefore, the coordinate data detected by the sensing region A, i.e. X electrodes x1, x2, · · ·, xn and the Y electrodes y1, y 2, · · ·, the coordinate data detected by the yn, lead region The voltages generated by By are not mixed, and even if they are mixed, the value can be made minute, so that the detection accuracy of coordinate data can be improved.

次に、本発明の実施の形態を図３を参照しつつ説明する。
図３に示す静電容量式の検出手段１０の構成は、上記参考例の構成とほぼ同様である。ただし、前記引回し領域Ｂｙに設けられる静電防護手段がシールド部材３１とは異なっている。 Next, an embodiment of the present invention will be described with reference to FIG.
The configuration of the capacitance type detection means 10 shown in FIG. 3 is substantially the same as the configuration of the reference example . However, the electrostatic protection means provided in the routing area By is different from the shield member 31.

図３の実施の形態では、前記カバーシート１５のうち、引回し領域Ｂｙに対応する部分の板厚寸法Ｈ２を、前記操作面１５ａの板厚寸法Ｈ１よりも厚く形成することにより、両者の間に段差１５ｂを設けた点にある。 In the embodiment of FIG. 3, of the cover sheet 15, the thickness dimension H2 of the portion corresponding to the lead-out area By, by forming thicker than plate thickness H1 of the operation surface 15a, both during Is provided with a step 15b.

このように、引回し領域Ｂｙの板厚寸法Ｈ２を他の部分（操作面１５ａ）よりも厚く形成することにより、被検出体が前記引回し領域Ｂｙに接近し、または接触した場合であっても、上記同様に前記被検出体と前記引回し領域Ｂｙの下部に位置する延長線Ｙａとの間に静電容量が形成されるのを防止できる。あるいは例え前記被検出体と各延長線Ｙａとの間に静電容量が形成されることがあるとしても、少なくとも前記被検出体の動きに対する静電容量の変化量を低く抑えることが可能となる。   In this way, by forming the plate thickness dimension H2 of the routing area By thicker than the other part (operation surface 15a), the detected object approaches or contacts the routing area By. In the same manner as described above, it is possible to prevent a capacitance from being formed between the object to be detected and the extension line Ya positioned below the routing area By. Alternatively, even if a capacitance may be formed between the detected object and each extension line Ya, at least the amount of change in the capacitance with respect to the movement of the detected object can be kept low. .

また、カバーシート１５のうち、センシング領域Ａに対応する操作面１５ａの部分と、引回し領域Ｂｙに対応する部分との板厚寸法を変えるだけでよく、カバーシート１５を同一の部材で一体成形することができるため、部品点数の増加を招くことがなく、製造コストの低減を図ることが可能である。 Further, it is only necessary to change the thickness of the cover sheet 15 between the portion of the operation surface 15a corresponding to the sensing area A and the portion corresponding to the routing area By, and the cover sheet 15 is integrally formed of the same member. Therefore, the number of parts is not increased, and the manufacturing cost can be reduced.

さらに操作者は、センシング領域Ａと引回し領域Ｂｙとを明確に区別することができるようになるため、静電容量式の検出装置１０の操作性を向上させることができる。 Furthermore, since the operator can clearly distinguish the sensing area A and the routing area By, the operability of the capacitive detection device 10 can be improved.

なお、上記実施の形態は、一方の引回し領域Ｂｙについて説明したが、他方の引回し領域Ｂｘについても同様である。 In addition, although the said embodiment demonstrated one routing area | region By, it is the same also about the other routing area | region Bx.

静電容量式の検出装置を示す概略構成図、Schematic configuration diagram illustrating a detection apparatus of the electrostatic capacity type, 本発明の参考例として、図１のＩＩ−ＩＩ線における断面図、As a reference example of the present invention, a sectional view taken along line II-II in FIG. 本発明の実施の形態として図２同様の断面図、Sectional view similar to FIG. 2 as an embodiment of the present invention,

１０ 静電容量式の検出装置
１１ 誘電シート
１２，１３ 絶縁膜
１４ 基板
１５ カバーシート
１５ａ 操作面
１５ｂ 段差
２１Ｘ，２１Ｙ 切換え手段
２３ 発振手段
２４ 増幅手段
２５ Ａ／Ｄ変換手段
２６ 制御手段
３１ シールド部材
Ａ センシング領域
Ｂｘ，Ｂｙ 引回し領域
Ｘａ，Ｙａ 延長線
ｘ１，ｘ２，・・・，ｘｎ Ｘ電極（センサ電極）
ｙ１，ｙ２，・・・，ｙｎ Ｙ電極（センサ電極） 10 Capacitance type detection device 11 Dielectric sheet 12, 13 Insulating film 14 Substrate 15 Cover sheet 15a Operation surface 15b Step 21X, 21Y Switching means 23 Oscillating means 24 Amplifying means 25 A / D conversion means 26 Control means 31 Shield member A Sensing area Bx, By Route area Xa, Ya Extension line x1, x2, ..., xn X electrode (sensor electrode)
y1, y2, ..., yn Y electrode (sensor electrode)

Claims (3)

被検出体が接触しまたは接近したことを検出するセンシング領域と、前記センシング領域に配線された複数のセンサ電極と、個々のセンサ電極と、前記センシング領域の外部に設けられた外部回路との間を接続する引き回し用の延長線と、前記センシング領域の近傍に設けられるとともに前記延長線が密集配置された引回し領域と、を備えた静電容量式の検出装置において、
前記センシング領域と前記引回し領域とがカバーシートで覆われ、前記カバーシートは、前記センシング領域を覆う部分の厚さ寸法よりも前記引回し領域を覆う部分の厚さ寸法の方が大きく、前記引回し領域を覆う前記カバーシートの表面が、前記センシング領域を覆う前記カバーシートの表面よりも前記延長線から離れる方向へ***して、前記被検出体が前記引回し領域を覆う前記カバーシートの表面に接触しまたは接近したときに、前記被検出体と前記延長線との間に形成される静電容量の変化を抑えることが可能とされており、
前記カバーシートは、前記センシング領域の全体を覆う厚さ寸法の薄い部分と、前記引回し領域の全体を覆う厚さ寸法の厚い部分とが、樹脂材料で一体に形成されていることを特徴とする静電容量式の検出装置。 Between a sensing region for detecting that the detected object is in contact with or approaching, a plurality of sensor electrodes wired to the sensing region, individual sensor electrodes, and an external circuit provided outside the sensing region In an electrostatic capacitance type detection device comprising: an extension line for routing that connects the extension line; and a routing area that is provided in the vicinity of the sensing area and in which the extension lines are densely arranged,
The sensing region and said circumventive and area is covered with a cover sheet, the cover sheet is large towards the thickness of the portion covering the circumventive and area than the thickness of the portion covering the sensing area , the surface of the cover sheet covering the circumventive to region, said raised away from the extension line from the surface of the cover sheet covering the sensing area, the detection object is covering the circumventive by region When contacting or approaching the surface of the cover sheet, it is possible to suppress a change in capacitance formed between the detected object and the extension line,
The cover sheet, wherein the total thickness thin dimension portion covering the sensing area, said circumventive a thickness of thick dimension portion to cover the entire region, are integrally formed of a resin material Capacitance type detection device. 前記センシング領域と前記引回し領域との間で、前記カバーシートの表面に段差が形成されている請求項１記載の静電容量式の検出装置。   The capacitance type detection device according to claim 1, wherein a step is formed on a surface of the cover sheet between the sensing area and the routing area. 前記センサ電極は、Ｘ方向に延びるとともにＹ方向に所定の間隔で配置された複数のＸ電極と、Ｙ方向に延びるとともにＸ方向に所定の間隔で配置された複数のＹ電極とが、互いに直交しながらマトリックス状に対向対置されたものである請求項１または２記載の静電容量式の検出装置。   A plurality of X electrodes extending in the X direction and arranged at a predetermined interval in the Y direction and a plurality of Y electrodes extending in the Y direction and arranged at a predetermined interval in the X direction are orthogonal to each other. 3. The capacitance type detection device according to claim 1, wherein the capacitance type detection device is opposed to each other in a matrix.
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