JP2005004969A - Touch panel and electromagnetic cooker using it - Google Patents

Touch panel and electromagnetic cooker using it Download PDF

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Publication number
JP2005004969A
JP2005004969A JP2003163614A JP2003163614A JP2005004969A JP 2005004969 A JP2005004969 A JP 2005004969A JP 2003163614 A JP2003163614 A JP 2003163614A JP 2003163614 A JP2003163614 A JP 2003163614A JP 2005004969 A JP2005004969 A JP 2005004969A
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Japan
Prior art keywords
electrode
unit
touch panel
panel
identification unit
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JP2003163614A
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JP2005004969A5 (en
JP4096818B2 (en
Inventor
Shinichi Ito
眞一 伊藤
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Panasonic Holdings Corp
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Matsushita Electric Industrial Co Ltd
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Publication of JP2005004969A5 publication Critical patent/JP2005004969A5/ja
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a space-saving touch panel composed of detection parts fewer than the number of touch keys, and having high reliability. <P>SOLUTION: This touch panel can be composed of the detection parts fewer than the number of the touch keys by composing it with: a voltage dividing part 2 having a predetermined impedance value for inputting the output voltage of an oscillation part 1; a panel part 3 formed of an electric insulator; a plurality of electrode parts formed in the panel part; electrode discrimination parts 10, 11 and 12 respectively connected to a plurality of the electrode parts and having predetermined impedance values; and the detection parts used for inputting the output voltage of the voltage dividing part to the electrode discrimination parts and for detecting the output voltage of the voltage dividing part. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【0001】
【発明の属する技術分野】
本発明は、各種の機器、特に電磁調理器等のフラットパネルを有する機器のフラットパネル部に設けたタッチキーに関するものである。
【0002】
【従来の技術】
従来、この種のタッチパネルは、例えば図14に示すものが提案されている。図14は従来例のブロック図である。3はガラス等で構成したフラットパネル部で、この両面に電極部4、5、6、7、8、9を設けて、4、5で構成するコンデンサC11でタッチキーSW1を、6、7で構成するコンデンサC12でタッチキーSW2を、8、9で構成するコンデンサC13でタッチキーSW3を構成している。1は発振部で、この発振部1の出力電圧を分圧部1(36)、分圧部2(37)、分圧部3(38)を構成するコンデンサC4、C5、C6を介して、電極部5、7、9に印加する。
【0003】
また、検知部1(39)、検知部2(40)、検知部3(41)はそれぞれタッチキーSW1、SW2、SW3を構成する電極部5、7、9に接続されている。電極部5、7、9に対向する電極部4、6、8に人がタッチしたとき、人の静電容量がC11、C12、C13の静電容量値よりはるかに大きいとすると、コンデンサC4とC11、コンデンサC5とC12、コンデンサC6とC13の分圧電圧を検知部1(39)、検知部2(40)、検知部3(41)に入力し、この電圧の大きさを検知するよう構成している。
【0004】
さらに、検知部1(39)、検知部2(40)、検知部3(41)の出力は制御部42に入力し、制御部42はタッチキーSW1、SW2、SW3のうちタッチしたキーに応じて他の機器を制御する信号を出力する。
【0005】
以上の構成で、例えば電極部4を指43でタッチしたとき、電極部4は指43、人体を経て接地される。従って発振部の出力電圧はコンデンサC11でバイパスされ、発振部1の出力電圧はコンデンサC4とC11で分圧されて、小さくなり電極部4をタッチしたと認識するものである。
【0006】
【特許文献1】
実開昭57−106152号公報
【0007】
【発明が解決しようとする課題】
しかしながらこのような構成のものでは、タッチキーの数だけ検知部が必要となり、構成が複雑で回路部も大きくなりコストも高くなるという課題があった。
【0008】
【課題を解決するための手段】
本発明は上記課題を解決するために、複数のタッチキーを構成する複数の電極部のそれぞれに所定のインピーダンスを有する電極識別部を接続し、各タッチキーに触れることにより得られる出力電圧の大きさを変えることにより、1つの検知部でタッチしたことを検知するとともに、どの電極にタッチしたか検知できるようにするものである。
【0009】
【発明の実施の形態】
請求項1に記載の発明は、所定の周波数の電圧を出力する発振部と、この発振部の出力電圧を入力する所定のインピーダンスを有する分圧部と、電気絶縁物よりなるパネル部と、このパネル部に設けた複数の電極部と、この複数の電極部のそれぞれに接続した所定のインピーダンスを有する電極識別部と、前記分圧部の出力電圧を前記電極識別部に入力するとともに、この分圧部の出力電圧を検知する検知部より構成したから、複数の電極でも1個の検知部でどの電極部にタッチしたか検知することができるものである。
【0010】
請求項2に記載の発明は、電極識別部のインピーダンスを所定の静電容量を有するコンデンサで構成したから、各電極部それぞれ大きさの異なる出力電圧を得ることができ、1個の検知部でどの電極部にタッチしたか検知することができるものである。
【0011】
請求項3に記載の発明は、電極識別部のコンデンサを発振部、分圧部、検知部等を搭載した基板部に実装してなり、この電極識別部の出力電圧を接触子を介してパネル部に設けた各電極部に印加するよう構成したから、基板部のコンデンサを最適容量値に設定して、1個の検知部でどの電極部にタッチしたか検知することができるものである。
【0012】
請求項4に記載の発明は、パネル部に電極識別部を設け、この電極識別部にコンデンサを実装して構成したから、分圧部の出力または検知部の入力に接続されるパネル部への接触子は1つで構成することができるものである。
【0013】
請求項5に記載の発明は、パネル部に電極識別部を設け、この電極識別部を2つの電極で構成し、この電極の大きさ、形状を変えて所定の静電容量を持たせるよう構成したから、パネル部に簡単な構成で電極識別部を構成することができるものである。
【0014】
請求項6に記載の発明は、パネル部に電極識別部を設け、この電極識別部を2つの電極で構成し、この電極部の一方の電極部と他方の電極部の間に絶縁膜を設け、この絶縁膜を介して前記2個の電極部は重なり合うよう構成し、この重なる面積を変えて所定の静電容量を持たせたから、パネル部に簡単な構成で電極識別部を構成することができるものである。
【0015】
請求項7に記載の発明は、電極識別部のインピーダンスを所定の抵抗値を有する抵抗器で構成したから、各電極部それぞれ大きさの異なる出力電圧を得ることができ、1個の検知部でどの電極部にタッチしたか検知することができるものである。
【0016】
請求項8に記載の発明は、電極識別部の抵抗器を発振部、分圧部、検知部等を搭載した基板部に実装してなり、この電極識別部の出力電圧を接触子を介してパネル部に設けた各電極部に印加するよう構成したから、基板部の抵抗器を最適抵抗値に設定して、1個の検知部でどの電極部にタッチしたか検知することができるものである。
【0017】
請求項9に記載の発明は、パネル部に電極識別部を設け、この電極識別部に抵抗器を実装して構成したから、パネル部に簡単な構成で電極識別部を構成することができるものである。
【0018】
請求項10に記載の発明は、パネル部に電極識別部を設け、この電極識別部に所定の固有抵抗を有する導電性ペーストを印刷し、この印刷距離を変えて所定の抵抗値を得るよう構成したから、パネル部に簡単な構成で電極識別部を構成することができるものである。
【0019】
請求項11に記載の発明は、パネル部に電極識別部を設け、この電極識別部に所定の固有抵抗を有する導電性ペーストを印刷し、この印刷幅、厚さを変えて所定の抵抗値を得るよう構成したから、パネル部に簡単な構成で電極識別部を構成することができるものである。
【0020】
請求項12に記載の発明は、請求項1〜11のいずれか1項に記載のタッチパネルを用いて電磁調理器を構成したから、フラットパネル上で容易に温度設定、電源入り、切り等ができ、使いやすい電磁調理器を提供することができるものである。
【0021】
【実施例】
以下、本発明の実施例について図面を用いて説明する。なお、従来例と同じものは同じ記号を用いて説明を省略する。
【0022】
(実施例1)
本実施例について図1、図2を用いて説明する。図1は本発明のタッチパネルの第1の実施例のブロック図である。3はガラス、プラスチック等のパネル部で、パネル部3の両面に電極部4、5、6、7、8、9を設け、4、5でコンデンサC11を構成し、6、7でコンデンサC12を、8、9でコンデンサC13を構成している。コンデンサC11、C12、C13はタッチキーSW1、SW2、SW3を構成している。
【0023】
また、電極部5、7、9に所定のインピーダンスz1、z2、z3を有する電極識別部1(10)、電極識別部2(11)、電極識別部3(12)、を接続している。1は発振部で、発振部1より出力された所定の周波数の交流電圧は所定のインピーダンスz0を有する分圧部2を経て、前記電極識別部1(10)、電極識別部2(11)、電極識別部3(12)に印加される。
【0024】
また、この分圧部2の出力電圧は検知部13に入力され、検知部13は入力される交流電圧を直流電圧に変換し、この直流電圧のレベルを検知し、タッチキーSW1、SW2、SW3のうちのどのタッチキーにタッチしたか判定し、その出力を制御部14に出力する。制御部14はタッチキーSW1、SW2、SW3のそれぞれのタッチしたキーに応じた制御すべき機器(例えばヒータの温度制御レベルあるいはオン、オフ)に出力し、制御する。以上の構成で、動作を説明する。
【0025】
例えば電極部6をタッチしたとき、発振部1の出力電圧は分圧部2を経て、電極識別部2(11)、電極部6、7で構成するコンデンサC12、指43、人体を経て大地に接続される。人体のインピーダンスは電極識別部1(10)、電極識別部2(11)、電極識別部3(12)のインピーダンスに比してはるかに小さいので、電極部6にタッチしたとき、分圧部2の出力電圧は(すなわち検知部13の入力電圧は)分圧部2のインピーダンスz0と電極識別部2(11)のインピーダンスz2および電極部6、7で構成するコンデンサC12の合成インピーダンスの分圧電圧となる。
【0026】
従って、電極識別部1(10)、電極識別部2(11)、電極識別部3(12)のインピーダンスz1、z2、z3としてz1<z2<z3と設定しておくと、検知部13への入力電圧は、タッチしないときの電圧とタッチしたときの電圧の差を検知するようにすれば、電極4にタッチしたときの電圧差は最も大きく、電極6にタッチしたときの電圧差は中程度、電極部8にタッチしたときの電圧差は最も小さくなる。この電圧差を検知することによって、タッチしたことを検知するとともに、どの電極部に(どのタッチキーに)タッチしたかも検知できるものである。図2に検知部13の検知電圧波形を示す。e1は電極部にタッチしてないときの発振部1の電圧を直流変換した電圧レベル、e2は電極部にタッチしたときの直流変換した電圧レベルを示す。Δe=e1−e2とすると、Δeが最も大きいと電極部4をタッチ、Δeが中程度だと電極部6をタッチ、Δeが最も小さいと電極部8をタッチしたことを検知できるものである。
【0027】
ここでは、タッチしてないときとタッチしたときの電圧差を検知すると述べたが、タッチしたときの電圧の絶対値を検知してもよい。
【0028】
(実施例2)
本発明の第2の実施例を図3に示す。
【0029】
図3は分圧部2をコンデンサC0で、電極識別部1(10)を短絡、電極識別部2(11)をコンデンサC2、電極識別部3(12)をコンデンサC3で構成した実施例である。C2>C3とすると、検知部13への入力電圧のタッチしたときの電圧レベル差Δeは、電極部4にタッチしたとき最も大きく、電極部6にタッチしたとき中程度、電極部8にタッチしたとき最も小さくなり、検知部13の1つでどの電極にタッチしたか(どのタッチキーにタッチしたか)検知できるものである。
【0030】
(実施例3)
本発明の第3の実施例を図4に示す。
【0031】
19はプリント基板で、発振部1、分圧部2、検知部13等を実装している。このプリント基板19上に電極識別部1(10)、電極識別部2(11)、電極識別部3(12)を構成するコンデンサ15、16を実装している。この実施例では2組の電極部を示しているが、数が多くても同様である。17、18は接触電極でプリント基板19に実装され、他端はパネル部3に設けた電極部5、7に接触する。発振部1、分圧部2電極識別部10、11から出力された電圧を接触電極17、18を介して電極部5、7に印加する。プリント基板19上で分圧部2と電極識別部1(10)、2(11)との接続点の電圧を検知部13に入力し、タッチしたか、さらにどの電極にタッチしたかを検知する。従ってこの実施例ではタッチキーの数だけ接触子は必要であるが、検知部は1つですみ、電子回路部が簡単に構成できるものである。
【0032】
(実施例4)
本発明の第4の実施例を図5に示す。
【0033】
図5で、3はパネル部であるが、そのパネル部の裏面、すなわち接触子が接触する側を示す。20は導電性ペーストを印刷した配線パターンで、21は少し広い面積を有する接触子が接触する接触パッドである。これはパネル3を実装する時、接触子を接触パッドに接触させるが、接触子の位置が少しずれても問題なく確実に接触させるためのものである。この実施例では、プリント基板19には、発振部1、分圧部2、検知部13等を実装し、電極識別部10、11はパネル部に実装するものである。接触子の接触パッド21より電極部5に至る通路は短絡、電極部7に至る通路はコンデンサ21を設け、電極識別部10、11を構成している。従ってこの実施例のように、パネル部3に電気識別部10を設けているので、接触子の数は1つ、検知部の数も1つでよく、非常に簡潔にタッチパネルを構成できる。
【0034】
(実施例5)
本発明の第5の実施例を図6示す。
【0035】
この実施例では、電極識別部としてコンデンサを実装するのではなく、配線パターンの引き回しで2個の電極を構成し、所定の静電容量を持たせ電極識別部を構成するものである。図6で、電極部5に繋がる電極識別部10を構成する2つの電極部23の静電容量は小さく、電極部7に繋がる電極識別部11を構成する2つの電極部24の静電容量は大きく、それぞれインピーダンスに違いを持たせ、個別部品を実装するのではなく、配線パターンの引き回しのみで、どの電極にタッチしたか、1つの接触子、1つの検知部で検知できるものである。
【0036】
(実施例6)
本発明の第6の実施例を図7に示す。
【0037】
図7はパネル部3の側面図である。タッチキーを構成する電極部5より導電性ペーストを印刷した配線パターン20を延長し、電極識別部を構成するコンデンサの1つの電極25を構成し、その上に絶縁膜26を印刷し、さらにその上に電極部27を設け、電極部25と27、絶縁膜26でコンデンサを構成し、電極部27の延長上に接触子が接触する接触パッド28を設ける。29は発振部1、分圧部2および検知部13に接続された接触子で、接触パッド28に接触する。この絶縁膜26を挟んだ電極25と27の面積を変えることで、所定の静電容量を有する電極識別部を構成でき、簡単な構成で1つの接触子、1つの検知部で複数のタッチキーのうちどのキーにタッチしたか検知できるものである。
【0038】
(実施例7)
本発明の第7の実施例を図8に示す。
【0039】
本実施例ではタッチキーのそれぞれの裏面電極5、7、9に繋がる電極識別部を、電極識別部10は短絡、電極識別部11は抵抗R2、電極識別部12は抵抗R3で構成し、分圧部2も抵抗R0で構成した実施例である。抵抗R2、R3の抵抗値をR2<R3としたときタッチキーSW1にタッチするとΔeは最大、タッチキーSW2にタッチするとΔeは中程度、タッチキーSW3にタッチするとΔeは最小となり、1つの検知部13でどのタッチキーにタッチしたか検知できるものである。
【0040】
(実施例8)
本発明の第8の実施例を図9に示す。
【0041】
19はプリント基板で、発振部1、分圧部2、検知部13等を実装している。このプリント基板19上に電極識別部1(10)、電極識別部2(11)、電極識別部3(12)を構成する抵抗器31、32を実装している。この実施例では2組の電極部を示しているが、数が多くても同様である。17、18は接触電極でプリント基板19に実装され、他端はパネル部3に設けた電極部5、7に接触する。発振部1、分圧部2、電極識別部10、11から出力された電圧を接触電極17、18を介して電極部5、7に印加する。プリント基板19上で分圧部2と電極識別部1(10)、2(11)との接続点の電圧を検知部13に入力し、タッチしたか、さらにどの電極にタッチしたかを検知する。従ってこの実施例ではタッチキーの数だけ接触子は必要であるが、検知部は1つですみ、電子回路部が簡単に構成できるものである。
【0042】
(実施例9)
本発明の第9の実施例を図10に示す。
【0043】
本実施例では電極部5に繋がる電極識別部は導電性パターン20で短絡、電極部7に繋がる電極識別部は抵抗29で構成し、接触子の接触パッド21に接続される。この構成でタッチキーSW1をタッチしたときの検知電圧の降下分Δeは大きく、タッチキーSW2をタッチしたときの検知電圧の降下分Δeは小さい。従って、1つの接触子、1つの検知部で複数のタッチキーのうち、どのタッチキーにタッチしたか検知できるものである。
【0044】
(実施例10)
本発明の第10の実施例を図11に示す。
【0045】
本実施例では、所定の固有抵抗を有する導電性ペーストを電極部5、7より接触パッド19まで所定の距離を引き回し、所定の抵抗値を得て電極識別部を構成するものである。本実施例では電極部4、5から接触パッドまでの距離をl1、l2としl1<l2とすれば、電極部5に繋がる抵抗値は小さく、電極部7に繋がる抵抗値は大きくなり、タッチキーSW1にタッチしたときの電圧降下分Δeは大きく、タッチキーSW2にタッチしたときの電圧降下分Δeは小さくなるので複数のタッチキーのうち、どのタッチキーにタッチしたか1つの接触子、1つの検知部で検知できるものである。
【0046】
(実施例11)
本発明の第11の実施例を図12に示す。
【0047】
図12では電極識別部を所定の固有抵抗を有する導電性ペーストの印刷パターンの幅を変えて所定の抵抗値を得るものである。本実施例ではタッチキーSW1を構成する電極部5に繋がるパターン幅w1は太く(抵抗値は小さく)、タッチキーSW2を構成する電極部7に繋がるパターン幅w2は細く(抵抗値は大きく)電極識別部を構成し、タッチキーSW1をタッチしたときは電圧降下分Δeは大きく、タッチキーSW2をタッチしたときは電圧降下分Δeは小さくなるようにしている。以上、本実施例でも1つの接触子、1つの検知部で複数のタッチキーのうち、どのタッチキーにタッチしたか検知できるものである。
【0048】
(実施例12)
本発明のタッチパネルを電磁調理器に用いた例を図13に示す。
【0049】
46はガラス等で構成したパネル部で、パネル部46の下部に設けたコイル部(図示せず)に流す高周波電流により、鍋置き部47、48に置いた鍋に誘導電流を流し、加熱するものである。49はタッチキーを構成する電極部で、50は鍋置き部47の設定温度を下げ、51は鍋置き部47の電源入り切りで、52は鍋置き部47の温度設定を上げるものである。同様に、53は鍋置き部48の温度設定を下げ、54は電源を入り切り、55は温度設定を上げるものである。このように電磁調理器に本発明を用いれば、各タッチキー6個に対して、検知部が1個でよくかつ接触子も1本で構成でき、信頼性も高く、省スペースでコストも安くできるものである。
【0050】
【発明の効果】
以上のように本発明の請求項1〜11に記載の発明によれば、タッチキーの信号を検知する検知部の数は、タッチキーの数より少なくてよく、信頼性の高いかつ小型のタッチパネルを構成することができる。
【0051】
請求項12に記載の発明によれば、電磁調理器に上記タッチパネルを設けることにより、省スペースで信頼性が高く、フラットパネル上で操作できる快適な電磁調理器を提供できる。
【図面の簡単な説明】
【図1】本発明の実施例1におけるタッチパネルのブロック図
【図2】本発明の実施例1におけるタッチパネルの検知部の検知電圧波形図
【図3】本発明の実施例2におけるタッチパネルのブロック図
【図4】本発明の実施例3におけるタッチパネルの斜視図
【図5】本発明の実施例4におけるパネル部の裏面図
【図6】本発明の実施例5におけるパネル部の裏面図
【図7】本発明の実施例6におけるタッチパネルの側面図
【図8】本発明の実施例7におけるタッチパネルのブロック図
【図9】本発明の実施例8におけるタッチパネルの斜視図
【図10】本発明の実施例9におけるパネル部の裏面図
【図11】本発明の実施例10におけるパネル部の裏面図
【図12】本発明の実施例11におけるパネル部の裏面図
【図13】タッチパネルを電磁調理器に用いた例を示す図
【図14】タッチパネルの従来例のブロック図
【符号の説明】
1 発振部
2 分圧部
3 パネル部
4、5、6、7、8、10 電極部
10、11、12 電極識別部
13 検知部
C0、C2、C3、15、16、22 コンデンサ
19 基板部
17、18 接触子
23、24 電極識別部を構成する電極
26 絶縁膜
R0、R2、R3 抵抗
30、31、32 抵抗器
33 、34 導電性ペーストの印刷パターン
35 電磁調理器
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a touch key provided on a flat panel portion of various devices, particularly devices having a flat panel such as an electromagnetic cooker.
[0002]
[Prior art]
Conventionally, this type of touch panel has been proposed as shown in FIG. 14, for example. FIG. 14 is a block diagram of a conventional example. 3 is a flat panel portion made of glass or the like, and electrode portions 4, 5, 6, 7, 8, and 9 are provided on both sides, and the touch key SW1 is set by the capacitor C11 formed by 4, 5 by 6,7. The touch key SW2 is constituted by the capacitor C12 constituting the touch key SW3, and the touch key SW3 is constituted by the capacitor C13 constituted by 8,9. Reference numeral 1 denotes an oscillating unit. The output voltage of the oscillating unit 1 is divided through capacitors C4, C5, and C6 constituting a voltage dividing unit 1 (36), a voltage dividing unit 2 (37), and a voltage dividing unit 3 (38). Applied to the electrode parts 5, 7, 9.
[0003]
The detection unit 1 (39), the detection unit 2 (40), and the detection unit 3 (41) are connected to the electrode units 5, 7, and 9 constituting the touch keys SW1, SW2, and SW3, respectively. When a person touches the electrode parts 4, 6, 8 facing the electrode parts 5, 7, 9 and the capacitance of the person is much larger than the capacitance values of C11, C12, C13, the capacitor C4 The divided voltage of C11, capacitors C5 and C12, and capacitors C6 and C13 is input to detection unit 1 (39), detection unit 2 (40), and detection unit 3 (41), and the magnitude of this voltage is detected. is doing.
[0004]
Furthermore, the outputs of the detection unit 1 (39), the detection unit 2 (40), and the detection unit 3 (41) are input to the control unit 42, and the control unit 42 responds to the touched key among the touch keys SW1, SW2, and SW3. Output signals to control other devices.
[0005]
With the above configuration, for example, when the electrode unit 4 is touched with the finger 43, the electrode unit 4 is grounded through the finger 43 and the human body. Therefore, the output voltage of the oscillating unit is bypassed by the capacitor C11, and the output voltage of the oscillating unit 1 is divided by the capacitors C4 and C11 so as to be recognized as having touched the electrode unit 4.
[0006]
[Patent Document 1]
Japanese Utility Model Publication No. 57-106152 [0007]
[Problems to be solved by the invention]
However, with such a configuration, the number of detection units required is the same as the number of touch keys, and there is a problem that the configuration is complicated, the circuit unit is large, and the cost is high.
[0008]
[Means for Solving the Problems]
In order to solve the above problems, the present invention connects an electrode identification unit having a predetermined impedance to each of a plurality of electrode units constituting a plurality of touch keys, and outputs a large output voltage by touching each touch key. By changing the height, it is possible to detect touching with one detection unit and to detect which electrode is touched.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
The invention according to claim 1 is an oscillation unit that outputs a voltage of a predetermined frequency, a voltage dividing unit that has a predetermined impedance for inputting an output voltage of the oscillation unit, a panel unit made of an electrical insulator, A plurality of electrode sections provided in the panel section, an electrode identification section having a predetermined impedance connected to each of the plurality of electrode sections, and an output voltage of the voltage dividing section are input to the electrode identification section. Since the detection unit detects the output voltage of the pressure unit, it is possible to detect which electrode unit is touched by one detection unit even with a plurality of electrodes.
[0010]
In the invention according to claim 2, since the impedance of the electrode identification unit is configured by a capacitor having a predetermined capacitance, it is possible to obtain an output voltage having a different size from each electrode unit. It is possible to detect which electrode unit is touched.
[0011]
According to a third aspect of the present invention, a capacitor of an electrode identification unit is mounted on a substrate unit on which an oscillation unit, a voltage dividing unit, a detection unit, etc. are mounted, and the output voltage of the electrode identification unit is connected to a panel via a contact. Since it is configured to apply to each electrode unit provided in the unit, it is possible to detect which electrode unit is touched by one detection unit by setting the capacitor of the substrate unit to an optimum capacitance value.
[0012]
In the invention according to claim 4, since the electrode identifying portion is provided in the panel portion, and the capacitor is mounted on the electrode identifying portion, the output to the voltage dividing portion or the input to the detecting portion is connected to the panel portion. One contact can be configured.
[0013]
The invention according to claim 5 is configured such that an electrode identifying portion is provided on the panel portion, the electrode identifying portion is constituted by two electrodes, and the size and shape of the electrode are changed to have a predetermined capacitance. Therefore, an electrode identification part can be comprised with a simple structure in a panel part.
[0014]
In the invention described in claim 6, an electrode identifying portion is provided on the panel portion, the electrode identifying portion is constituted by two electrodes, and an insulating film is provided between one electrode portion and the other electrode portion of the electrode portion. Since the two electrode portions are configured to overlap with each other through the insulating film, and the overlapping area is changed to have a predetermined capacitance, the electrode identifying portion can be configured with a simple configuration on the panel portion. It can be done.
[0015]
According to the seventh aspect of the present invention, since the impedance of the electrode identification unit is configured by a resistor having a predetermined resistance value, it is possible to obtain an output voltage having a different size for each electrode unit. It is possible to detect which electrode unit is touched.
[0016]
According to the eighth aspect of the present invention, the resistor of the electrode identification unit is mounted on the substrate unit on which the oscillation unit, the voltage dividing unit, the detection unit and the like are mounted, and the output voltage of the electrode identification unit is connected via a contactor. Since it is configured to be applied to each electrode part provided in the panel part, it is possible to detect which electrode part is touched by one detection part by setting the resistor of the board part to the optimum resistance value. is there.
[0017]
According to the ninth aspect of the present invention, since the electrode identifying portion is provided on the panel portion and the resistor is mounted on the electrode identifying portion, the electrode identifying portion can be configured with a simple configuration on the panel portion. It is.
[0018]
The invention according to claim 10 is configured such that an electrode identifying portion is provided on the panel portion, a conductive paste having a predetermined specific resistance is printed on the electrode identifying portion, and a predetermined resistance value is obtained by changing the printing distance. Therefore, an electrode identification part can be comprised with a simple structure in a panel part.
[0019]
In the eleventh aspect of the present invention, an electrode identifying portion is provided on the panel portion, a conductive paste having a predetermined specific resistance is printed on the electrode identifying portion, and a predetermined resistance value is changed by changing the printing width and thickness. Since it was comprised so that it might obtain, an electrode identification part can be comprised with a simple structure in a panel part.
[0020]
Since the electromagnetic cooker is configured using the touch panel according to any one of the first to eleventh aspects, the invention according to the twelfth aspect can easily set the temperature, turn on and off the power on the flat panel. It can provide an easy-to-use electromagnetic cooker.
[0021]
【Example】
Embodiments of the present invention will be described below with reference to the drawings. In addition, the same thing as a prior art example uses the same symbol, and abbreviate | omits description.
[0022]
(Example 1)
This embodiment will be described with reference to FIGS. FIG. 1 is a block diagram of a first embodiment of a touch panel according to the present invention. 3 is a panel portion made of glass, plastic, etc., and electrode portions 4, 5, 6, 7, 8, and 9 are provided on both sides of the panel portion 3, and a capacitor C11 is formed by 4, 5 and a capacitor C12 is formed by 6, 7 , 8 and 9 constitute a capacitor C13. Capacitors C11, C12, and C13 constitute touch keys SW1, SW2, and SW3.
[0023]
Further, the electrode identification unit 1 (10), the electrode identification unit 2 (11), and the electrode identification unit 3 (12) having predetermined impedances z1, z2, and z3 are connected to the electrode units 5, 7, and 9, respectively. Reference numeral 1 denotes an oscillating unit, and an alternating voltage having a predetermined frequency output from the oscillating unit 1 passes through a voltage dividing unit 2 having a predetermined impedance z0, and then the electrode identifying unit 1 (10), the electrode identifying unit 2 (11), Applied to the electrode identification unit 3 (12).
[0024]
The output voltage of the voltage dividing unit 2 is input to the detection unit 13, and the detection unit 13 converts the input AC voltage into a DC voltage, detects the level of the DC voltage, and touch keys SW1, SW2, SW3. It is determined which of the touch keys is touched, and the output is output to the control unit 14. The control unit 14 outputs and controls the device to be controlled (for example, the heater temperature control level or on / off) according to the touched key of each of the touch keys SW1, SW2, and SW3. The operation will be described with the above configuration.
[0025]
For example, when the electrode unit 6 is touched, the output voltage of the oscillation unit 1 passes through the voltage dividing unit 2, passes through the electrode identification unit 2 (11), the capacitor C 12 formed of the electrode units 6 and 7, the finger 43, and the human body. Connected. Since the impedance of the human body is much smaller than the impedance of the electrode identification unit 1 (10), the electrode identification unit 2 (11), and the electrode identification unit 3 (12), when the electrode unit 6 is touched, the voltage dividing unit 2 Output voltage (that is, the input voltage of the detection unit 13) is the divided voltage of the impedance z0 of the voltage dividing unit 2, the impedance z2 of the electrode identification unit 2 (11), and the combined impedance of the capacitor C12 composed of the electrode units 6 and 7. It becomes.
[0026]
Therefore, if the impedances z1, z2, and z3 of the electrode identification unit 1 (10), the electrode identification unit 2 (11), and the electrode identification unit 3 (12) are set as z1 <z2 <z3, If the difference between the voltage when not touching and the voltage when touching is detected, the voltage difference when touching the electrode 4 is the largest, and the voltage difference when touching the electrode 6 is moderate. The voltage difference when the electrode part 8 is touched becomes the smallest. By detecting this voltage difference, it is possible to detect touch and to detect which electrode part (to which touch key) is touched. FIG. 2 shows a detection voltage waveform of the detection unit 13. e1 indicates a voltage level obtained by DC conversion of the voltage of the oscillation unit 1 when the electrode unit is not touched, and e2 indicates a voltage level obtained by DC conversion when the electrode unit is touched. When Δe = e1−e2, it is possible to detect that the electrode portion 4 is touched when Δe is the largest, the electrode portion 6 is touched when Δe is medium, and the electrode portion 8 is touched when Δe is the smallest.
[0027]
Here, it is described that the voltage difference between when not touching and when touching is detected, but the absolute value of the voltage when touching may be detected.
[0028]
(Example 2)
A second embodiment of the present invention is shown in FIG.
[0029]
FIG. 3 shows an embodiment in which the voltage dividing unit 2 is constituted by a capacitor C0, the electrode identification unit 1 (10) is short-circuited, the electrode identification unit 2 (11) is constituted by a capacitor C2, and the electrode identification unit 3 (12) is constituted by a capacitor C3. . When C2> C3, the voltage level difference Δe when the input voltage to the detection unit 13 is touched is the largest when the electrode unit 4 is touched, and the electrode unit 8 is touched moderately when the electrode unit 6 is touched. In other words, it becomes the smallest, and it is possible to detect which electrode is touched (which touch key is touched) by one of the detection units 13.
[0030]
Example 3
A third embodiment of the present invention is shown in FIG.
[0031]
Reference numeral 19 denotes a printed circuit board on which the oscillating unit 1, the voltage dividing unit 2, the detecting unit 13, and the like are mounted. Capacitors 15 and 16 constituting the electrode identification unit 1 (10), the electrode identification unit 2 (11), and the electrode identification unit 3 (12) are mounted on the printed board 19. In this embodiment, two sets of electrode portions are shown, but the same is true even if the number is large. Reference numerals 17 and 18 are contact electrodes mounted on the printed circuit board 19, and the other ends are in contact with the electrode portions 5 and 7 provided on the panel portion 3. The voltage output from the oscillating unit 1, the voltage dividing unit 2, and the electrode identifying units 10 and 11 is applied to the electrode units 5 and 7 via the contact electrodes 17 and 18. On the printed circuit board 19, the voltage at the connection point between the voltage dividing unit 2 and the electrode identifying units 1 (10) and 2 (11) is input to the detecting unit 13 to detect which electrode is touched or which electrode is touched. . Therefore, in this embodiment, the number of contacts is the same as the number of touch keys, but only one detection unit is required, and the electronic circuit unit can be easily configured.
[0032]
(Example 4)
A fourth embodiment of the present invention is shown in FIG.
[0033]
In FIG. 5, 3 is a panel portion, and shows the back surface of the panel portion, that is, the side on which the contacts come into contact. Reference numeral 20 denotes a wiring pattern on which a conductive paste is printed, and reference numeral 21 denotes a contact pad with which a contact having a slightly larger area comes into contact. This is to contact the contact pads with the contact pads when the panel 3 is mounted, but to ensure contact without any problem even if the position of the contact is slightly shifted. In this embodiment, the oscillator 1, the voltage divider 2, the detector 13 and the like are mounted on the printed circuit board 19, and the electrode identifying units 10 and 11 are mounted on the panel unit. The path from the contact pad 21 of the contactor to the electrode unit 5 is short-circuited, and the path to the electrode unit 7 is provided with a capacitor 21 to constitute the electrode identification units 10 and 11. Accordingly, since the electrical identification unit 10 is provided in the panel unit 3 as in this embodiment, the number of contacts and the number of detection units may be one, and the touch panel can be configured very simply.
[0034]
(Example 5)
FIG. 6 shows a fifth embodiment of the present invention.
[0035]
In this embodiment, a capacitor is not mounted as the electrode identification unit, but two electrodes are configured by routing the wiring pattern, and the electrode identification unit is configured with a predetermined capacitance. In FIG. 6, the capacitances of the two electrode parts 23 constituting the electrode identification part 10 connected to the electrode part 5 are small, and the capacitances of the two electrode parts 24 constituting the electrode identification part 11 connected to the electrode part 7 are The impedance is large, and each electrode is touched only by routing the wiring pattern rather than mounting individual parts with different impedances, and it can be detected by one contact and one detection unit.
[0036]
(Example 6)
A sixth embodiment of the present invention is shown in FIG.
[0037]
FIG. 7 is a side view of the panel unit 3. The wiring pattern 20 printed with the conductive paste is extended from the electrode part 5 constituting the touch key to constitute one electrode 25 of the capacitor constituting the electrode identification part, and the insulating film 26 is printed thereon, and further An electrode part 27 is provided on the electrode part, a capacitor is constituted by the electrode parts 25 and 27 and the insulating film 26, and a contact pad 28 on which the contactor contacts is provided on the extension of the electrode part 27. A contact 29 is connected to the oscillating unit 1, the voltage dividing unit 2, and the detecting unit 13, and contacts the contact pad 28. By changing the areas of the electrodes 25 and 27 sandwiching the insulating film 26, an electrode identification unit having a predetermined capacitance can be configured, and a single contact with a simple configuration and a plurality of touch keys with one detection unit It is possible to detect which key is touched.
[0038]
(Example 7)
A seventh embodiment of the present invention is shown in FIG.
[0039]
In this embodiment, the electrode identification unit connected to each of the back electrodes 5, 7, 9 of the touch key is composed of the electrode identification unit 10 being short-circuited, the electrode identification unit 11 being a resistor R2, and the electrode identification unit 12 being a resistor R3. The pressure part 2 is also an example constituted by a resistor R0. When the resistance values of the resistors R2 and R3 are R2 <R3, when the touch key SW1 is touched, Δe is maximum, when the touch key SW2 is touched, Δe is medium, and when touching the touch key SW3, Δe is minimum. It is possible to detect which touch key is touched at 13.
[0040]
(Example 8)
FIG. 9 shows an eighth embodiment of the present invention.
[0041]
Reference numeral 19 denotes a printed circuit board on which the oscillating unit 1, the voltage dividing unit 2, the detecting unit 13, and the like are mounted. Resistors 31 and 32 constituting the electrode identification unit 1 (10), the electrode identification unit 2 (11), and the electrode identification unit 3 (12) are mounted on the printed board 19. In this embodiment, two sets of electrode portions are shown, but the same is true even if the number is large. Reference numerals 17 and 18 are contact electrodes mounted on the printed circuit board 19, and the other ends are in contact with the electrode portions 5 and 7 provided on the panel portion 3. The voltage output from the oscillating unit 1, the voltage dividing unit 2, and the electrode identifying units 10 and 11 is applied to the electrode units 5 and 7 via the contact electrodes 17 and 18. On the printed circuit board 19, the voltage at the connection point between the voltage dividing unit 2 and the electrode identifying units 1 (10) and 2 (11) is input to the detecting unit 13 to detect which electrode is touched or which electrode is touched. . Therefore, in this embodiment, the number of contacts is the same as the number of touch keys, but only one detection unit is required, and the electronic circuit unit can be easily configured.
[0042]
Example 9
A ninth embodiment of the present invention is shown in FIG.
[0043]
In this embodiment, the electrode identification part connected to the electrode part 5 is short-circuited by the conductive pattern 20, and the electrode identification part connected to the electrode part 7 is constituted by the resistor 29 and is connected to the contact pad 21 of the contactor. With this configuration, the detected voltage drop Δe when the touch key SW1 is touched is large, and the detected voltage drop Δe when the touch key SW2 is touched is small. Therefore, it is possible to detect which touch key of a plurality of touch keys is touched by one contact and one detection unit.
[0044]
(Example 10)
A tenth embodiment of the present invention is shown in FIG.
[0045]
In the present embodiment, a conductive paste having a predetermined specific resistance is routed a predetermined distance from the electrode parts 5 and 7 to the contact pad 19 to obtain a predetermined resistance value, thereby constituting an electrode identification part. In this embodiment, if the distances from the electrode parts 4 and 5 to the contact pads are l1 and l2 and l1 <l2, the resistance value connected to the electrode part 5 is small, the resistance value connected to the electrode part 7 is large, and the touch key Since the voltage drop Δe when touching SW1 is large and the voltage drop Δe when touching the touch key SW2 is small, which touch key is touched among a plurality of touch keys, one contact, It can be detected by the detection unit.
[0046]
(Example 11)
An eleventh embodiment of the present invention is shown in FIG.
[0047]
In FIG. 12, a predetermined resistance value is obtained by changing the width of the printed pattern of the conductive paste having a predetermined specific resistance in the electrode identification portion. In this embodiment, the pattern width w1 connected to the electrode part 5 constituting the touch key SW1 is thick (resistance value is small), and the pattern width w2 connected to the electrode part 7 constituting the touch key SW2 is thin (resistance value is large). The identification unit is configured such that when the touch key SW1 is touched, the voltage drop Δe is large, and when the touch key SW2 is touched, the voltage drop Δe is small. As described above, in this embodiment, it is possible to detect which touch key is touched among a plurality of touch keys by one contact and one detection unit.
[0048]
(Example 12)
The example which used the touch panel of this invention for the electromagnetic cooker is shown in FIG.
[0049]
46 is a panel portion made of glass or the like, and an induction current is passed through the pan placed in the pan placing portions 47 and 48 by a high-frequency current passed through a coil portion (not shown) provided at the lower portion of the panel portion 46 to heat it. Is. 49 is an electrode part constituting the touch key, 50 is a temperature setting for the pan holder 47, 51 is a power switch for the pot holder 47, and 52 is a temperature setting for the pot holder 47. Similarly, 53 lowers the temperature setting of the pan holder 48, 54 turns off the power, and 55 increases the temperature setting. If the present invention is used for an electromagnetic cooker in this way, for each of the six touch keys, only one detection unit and one contact can be formed, which is highly reliable, space-saving and inexpensive. It can be done.
[0050]
【The invention's effect】
As described above, according to the first to eleventh aspects of the present invention, the number of detection units for detecting a touch key signal may be smaller than the number of touch keys, and a highly reliable and small touch panel. Can be configured.
[0051]
According to the invention described in claim 12, by providing the touch panel on the electromagnetic cooker, it is possible to provide a comfortable electromagnetic cooker that is space-saving and highly reliable and that can be operated on a flat panel.
[Brief description of the drawings]
FIG. 1 is a block diagram of a touch panel in Embodiment 1 of the present invention. FIG. 2 is a detected voltage waveform diagram of a detection unit of the touch panel in Embodiment 1 of the present invention. 4 is a perspective view of a touch panel in Embodiment 3 of the present invention. FIG. 5 is a rear view of the panel portion in Embodiment 4 of the present invention. FIG. 6 is a rear view of the panel portion in Embodiment 5 of the present invention. FIG. 8 is a side view of a touch panel in Embodiment 6 of the present invention. FIG. 8 is a block diagram of a touch panel in Embodiment 7 of the present invention. FIG. 9 is a perspective view of a touch panel in Embodiment 8 of the present invention. FIG. 11 is a rear view of the panel portion in Example 10 of the present invention. FIG. 12 is a rear view of the panel portion in Embodiment 11 of the present invention. Figure 14 is a conventional example of a block diagram of a touch panel showing an example of using the magnetic cooker EXPLANATION OF REFERENCE NUMERALS
DESCRIPTION OF SYMBOLS 1 Oscillation part 2 Voltage division part 3 Panel part 4, 5, 6, 7, 8, 10 Electrode part 10, 11, 12 Electrode identification part 13 Detection part C0, C2, C3, 15, 16, 22 Capacitor 19 Substrate part 17 , 18 Contacts 23, 24 Electrodes constituting the electrode identification portion 26 Insulating films R0, R2, R3 Resistors 30, 31, 32 Resistors 33, 34 Print pattern 35 of conductive paste 35 Electromagnetic cooker

Claims (12)

所定の周波数の電圧を出力する発振部と、この発振部の出力電圧を入力する所定のインピーダンスを有する分圧部と、電気絶縁物よりなるパネル部と、このパネル部に設けた複数の電極部と、この複数の電極部のそれぞれに接続した所定のインピーダンスを有する電極識別部と、前記分圧部の出力電圧を前記電極識別部に入力するとともに、この分圧部の出力電圧を検知する検知部よりなるタッチパネル。An oscillating unit that outputs a voltage of a predetermined frequency, a voltage dividing unit that has a predetermined impedance for inputting an output voltage of the oscillating unit, a panel unit made of an electrical insulator, and a plurality of electrode units provided on the panel unit And an electrode identification unit having a predetermined impedance connected to each of the plurality of electrode units, and an input voltage output from the voltage dividing unit to the electrode identification unit, and a detection for detecting the output voltage of the voltage dividing unit Touch panel consisting of parts. 電極識別部のインピーダンスを所定の静電容量を有するコンデンサで構成した請求項1に記載のタッチパネル。The touch panel as set forth in claim 1, wherein the impedance of the electrode identification unit is configured by a capacitor having a predetermined capacitance. 電極識別部のコンデンサを発振部、分圧部、検知部等を搭載した基板部に実装してなり、この電極識別部の出力電圧を、接触子を介してパネル部に設けた各電極部に印加するよう構成した請求項2に記載のタッチパネル。The capacitor of the electrode identification part is mounted on the board part on which the oscillation part, voltage dividing part, detection part, etc. are mounted, and the output voltage of this electrode identification part is applied to each electrode part provided on the panel part via a contactor. The touch panel according to claim 2, wherein the touch panel is configured to be applied. パネル部に電極識別部を設け、この電極識別部を、コンデンサを実装して構成した請求項2に記載のタッチパネル。The touch panel according to claim 2, wherein an electrode identification unit is provided on the panel unit, and the electrode identification unit is configured by mounting a capacitor. パネル部に電極識別部を設け、この電極識別部を2つの電極で構成し、この電極の大きさ、形状を変えて所定の静電容量を持たせるよう構成した請求項2に記載のタッチパネル。The touch panel according to claim 2, wherein an electrode identification unit is provided on the panel unit, the electrode identification unit is configured by two electrodes, and the size and shape of the electrode are changed to have a predetermined capacitance. パネル部に電極識別部を設け、この電極識別部を2つの電極で構成し、この電極部の一方の電極部と他方の電極部の間に絶縁膜を設け、この絶縁膜を介して前記2個の電極部を重なり合うよう構成し、この重なる面積を変えて所定の静電容量を持たせた請求項2に記載のタッチパネル。An electrode identifying portion is provided in the panel portion, the electrode identifying portion is constituted by two electrodes, an insulating film is provided between one electrode portion and the other electrode portion of the electrode portion, and the 2 The touch panel according to claim 2, wherein the electrode portions are configured to overlap each other, and the overlapping area is changed to have a predetermined capacitance. 電極識別部のインピーダンスを所定の抵抗値を有する抵抗器で構成した請求項1に記載のタッチパネル。The touch panel according to claim 1, wherein the impedance of the electrode identification unit is configured by a resistor having a predetermined resistance value. 電極識別部の抵抗器を発振部、分圧部、検知部等を搭載した基板部に実装してなり、この電極識別部の出力電圧を接触子を介してパネル部に設けた各電極部に印加するよう構成した請求項7に記載のタッチパネル。The resistor of the electrode identification unit is mounted on the substrate unit on which the oscillation unit, the voltage dividing unit, the detection unit, etc. are mounted, and the output voltage of this electrode identification unit is applied to each electrode unit provided on the panel unit via a contactor. The touch panel according to claim 7, configured to be applied. パネル部に電極識別部を設け、この電極識別部を抵抗器を実装して構成した請求項7に記載のタッチパネル。The touch panel according to claim 7, wherein an electrode identification unit is provided in the panel unit, and the electrode identification unit is configured by mounting a resistor. パネル部に電極識別部を設け、この電極識別部を所定の固有抵抗を有する導電性ペーストを印刷し、この印刷距離を変えて所定の抵抗値を得るよう構成した請求項7に記載のタッチパネル。The touch panel according to claim 7, wherein an electrode identification unit is provided on the panel unit, and the electrode identification unit is printed with a conductive paste having a predetermined specific resistance, and a predetermined resistance value is obtained by changing the printing distance. パネル部に電極識別部を設け、この電極識別部を所定の固有抵抗を有する導電性ペーストを印刷し、この印刷幅、厚さを変えて所定の抵抗値を得るよう構成した請求項7に記載のタッチパネル。The electrode identifying portion is provided on the panel portion, and the electrode identifying portion is printed with a conductive paste having a predetermined specific resistance, and the printed width and thickness are changed to obtain a predetermined resistance value. Touch panel. 請求項1〜11のいずれか1項に記載のタッチパネルを用いた電磁調理器。The electromagnetic cooker using the touchscreen of any one of Claims 1-11.
JP2003163614A 2003-06-09 2003-06-09 Electromagnetic cooker Expired - Fee Related JP4096818B2 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008134018A (en) * 2006-11-29 2008-06-12 Matsushita Electric Ind Co Ltd Heating cooker
JP2013069522A (en) * 2011-09-22 2013-04-18 Kyushu Institute Of Technology Touch switch device
JP2015133206A (en) * 2014-01-10 2015-07-23 三菱電機株式会社 Touch switch device, and method for determining presence of contact for use in touch switch device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008134018A (en) * 2006-11-29 2008-06-12 Matsushita Electric Ind Co Ltd Heating cooker
JP2013069522A (en) * 2011-09-22 2013-04-18 Kyushu Institute Of Technology Touch switch device
JP2015133206A (en) * 2014-01-10 2015-07-23 三菱電機株式会社 Touch switch device, and method for determining presence of contact for use in touch switch device

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