JP2020512625A - 誘導センシングと静電容量センシングとを組み合わせた装置及び方法 - Google Patents
誘導センシングと静電容量センシングとを組み合わせた装置及び方法 Download PDFInfo
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Abstract
Description
本願は、米国特許出願題15/637731号、2017年6月29日出願の国際出願であり、米国特許仮出願題62/470061号、2017年3月10日出願、及び米国特許仮出願題62/470044号、2017年3月10日出願により優先権を主張し、これらの特許出願の全部を、その全文を参照することによって本明細書に含める。
多数の電子装置は、ユーザが当該電子装置と対話するためのタッチセンサ(本明細書中ではセンシング装置または単位セルとも称する)を含む。例えば、現金自動預け払い機(ATM:automatic teller machine)、インフォメーションセンター(案内所)、スマートホン、自動販売機、洗濯機、テレビジョン、コンピュータ、及び冷蔵庫は、センシング装置、及びこれに対応するタッチセンシング回路を含むことができる。物体がセンシング装置にタッチ(接触)または近接すると、センシング装置を用いて検出したこの物体の存在及び位置を、タッチセンシング回路を用いて捕捉して記録することができる。
Claims (20)
- 第1ノードに結合された第1端子と、
前記第1ノードに結合された第1電極と、
第2端子と、
前記第2端子に結合された第2電極と、
誘導コイルと、
第1コンデンサとを具えたセンシング装置であって、
第1モードでは、第1信号を前記第1端子で受信して第2信号を前記第2端子上に出力し、該第2信号は前記センシング装置の静電容量を表し、
前記誘導コイルと前記第1コンデンサとは前記第1ノードと接地との間に並列に結合され、第2モードでは、第3信号を前記第1端子で受信して第4信号を前記第2端子上に出力し、該第4信号は前記センシング装置のインダクタンスを表すセンシング装置。 - 前記静電容量が、前記第1電極と前記第2電極との間の相互静電容量を示す、請求項1に記載のセンシング装置。
- 前記誘導コイル及び前記第1コンデンサと並列な抵抗器をさらに具えている、請求項1に記載のセンシング装置。
- 第2コンデンサが、前記誘導コイル及び前記第1コンデンサと直列である、請求項1に記載のセンシング装置。
- 前記第3信号に応答して、前記誘導コイルの所に磁界を発生する、請求項1に記載のセンシング装置。
- 前記誘導コイルに近接した物体が、前記磁界に対抗する渦電流を誘導し、該渦電流が、前記第4信号が表すインダクタンスを変化させる、請求項5に記載のセンシング装置。
- 前記第1端子がパルス幅変調器の第3端子に結合され、前記第2端子が電荷測定回路の第4端子に結合されている、請求項1に記載のセンシング装置。
- 前記電荷測定回路が、前記第1モードでは前記第2信号を用いて前記センシング装置の静電容量を測定し、前記第2モードでは前記第2信号を用いて前記センシング装置のインダクタンスを測定するように構成されている、請求項7に記載のセンシング装置。
- 前記第1信号が第1周波数を有し、前記第3信号が第2周波数を有する、請求項1に記載のセンシング装置。
- 前記第3信号の位相が、前記第1信号の位相に対しておよそ90度だけシフトしている、請求項1に記載のセンシング装置。
- 第1端子に結合された第1電極と、
第2端子に結合された第2電極と、
第1誘導コイルと、
第2コンデンサとを具えた装置であって、
第1モードでは、第1信号を前記第1端子で受信して第2信号を前記第2端子上に出力し、該第1信号は前記第1電極と前記第2電極との間に電界を発生し、
前記第1誘導コイルと前記第2コンデンサとは、前記第1端子と接地との間に並列に結合され、第2モードでは、第3信号を前記第1端子で受信して第4信号を前記第2端子上に出力し、該第3信号は前記第1誘導コイルの所に磁界を発生する装置。 - 前記第2信号は、前記第1電極と前記第2電極との間の静電容量を表し、前記第4信号は、前記第1誘導コイルのインダクタンスを表す、請求項11に記載の装置。
- 前記第1誘導コイルに近接した物体が、前記磁界に対抗する渦電流を誘導して前記第4信号を変化させ、前記第4信号の変化は、前記第1誘導コイルのインダクタンスの変化を示す、請求項11に記載の装置。
- 前記第1電極及び前記第2電極が平面コイルであり、前記第1誘導コイルがソレノイドコイルである、請求項11に記載の装置。
- 前記第1誘導コイルに磁気結合された第2誘導コイルをさらに具えている、請求項11に記載の装置。
- 前記第1電極が内周及び外周を有し、前記第2電極が前記第1電極の内周の内側に配置されている、請求項11に記載の装置。
- 第1モードにおいて第1信号を第1電極に供給するステップと、
前記第1信号が前記第1電極に供給されたことに応答して、第2信号を第2電極で受信するステップであって、該第2信号は前記第1電極と該第2電極との間の静電容量を示すステップと、
第2モードにおいて第3信号を誘導コイルに供給するステップと、
前記第3信号に応答して、第4信号を前記誘導コイルで受信するステップであって、該第4信号は前記誘導コイルのインダクタンスを示すステップと
を含む方法。 - 前記第2信号が変化すると、容量性物体が前記第1電極または前記第2電極に近接しているものと判定するステップをさらに含み、前記第2信号の変化が、前記第1電極と前記第2電極との間の静電容量の変化を示す、請求項17に記載の方法。
- 前記第4信号が変化すると、鉄類の金属物体または非鉄金属物体が前記誘導コイルの電極に近接しているものと判定するステップをさらに含み、前記第4信号の変化が、前記誘導コイルのインダクタンスの変化を示す、請求項17に記載の方法。
- 前記第3信号を前記第1信号に対して90度だけ位相シフトさせる、請求項17に記載の方法。
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US15/637,731 US10444916B2 (en) | 2017-03-10 | 2017-06-29 | Combined inductive sensing and capacitive sensing |
US15/637,731 | 2017-06-29 | ||
PCT/US2018/019252 WO2018164853A1 (en) | 2017-03-10 | 2018-02-22 | Combined inductive sensing and capacitive sensing |
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