JP4720857B2 - 静電容量型入力装置および入力機能付き表示装置 - Google Patents
静電容量型入力装置および入力機能付き表示装置 Download PDFInfo
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Description
さらに、第1の透光性電極、第2の透光性電極、およびダミーパターンを同時形成することで製造工程を簡素化することができ、コストを低減することができる。
本発明において、前記第1の透光性電極、前記第2の透光性電極、および前記ダミーパターンは、単層膜からなる同一の透光性導電膜により形成されていることが好ましい。第1の透光性電極、第2の透光性電極、およびダミーパターンの存在を目立たなくする構成として、第1の透光性電極、第2の透光性電極、およびダミーパターンを多層膜で形成することが考えられるが、かかる構成を採用する場合、多層膜に絶縁膜を含ませざるを得ない場合が多く、第1の透光性電極および第2の透光性電極の電気的抵抗が増大するが、本発明によれば、第1の透光性電極および第2の透光性電極を単層膜により形成しても、第1の透光性電極および第2の透光性電極の存在が目立たない。それ故、第1の透光性電極および第2の透光性電極の電気的抵抗を低くすることができる。また、製造工程を簡素化することができるので、コストを低減することもできる。
(全体構成)
図1(a)、(b)は各々、本発明を適用した入力装置付き表示装置の構成を模式的に示す説明図、およびこの入力装置付き表示装置の平面的な構成を模式的に示す説明図である。なお、図1(b)において、第1の透光性電極パターンおよび第2の透光性電極パターンについて実線で簡略化して示してあり、それらの数も減らして示してある。
図2(a)、(b)は、本発明の実施の形態1に係る入力装置に形成した透光性電極パターン(第1の透光性電極パターンおよび第2の透光性電極パターン)の平面的な構成を示す説明図、および第1の透光性電極パターンと第2の透光性電極パターンの隙間を拡大した拡大平面図である。図3(a)、(b)は各々、本発明の実施の形態1に係る入力装置の図2(a)におけるA1−A1′断面図、および透光性電極パターンと金属配線との接続構造を示す断面図なお、図2(a)においては、第1の透光性電極パターンおよび第2の透光性電極パターンの一部を抜粋して示してある。
透光性基板10:ガラス(t=0.5mm、n=1.52)
第1の透光性電極パターン11:ITO膜(t=10〜100nm、n=1.8〜1.9)
第2の透光性電極パターン12:ITO膜(t=10〜100nm、n=1.8〜1.9)
層間絶縁膜4a:アクリル樹脂(t=1.5μm、n=1.52)
中継電極:ITO膜(t=10〜50nm、n=1.8〜1.9)
粘着剤層30:アクリル樹脂(t=200μm、n=1.48)
カバー基板40:ガラス(t=0.5mm、n=1.52)
の通りである。
図2(a)、(b)および図3(a)に示すように、本形態の入力装置10において、透光性基板15を平面視したときに、第1の透光性電極パターン11と第2の透光性電極パターン12とに挟まれた領域には、第1の透光性電極パターン11および第2の透光性電極パターン12と同等の屈折率を備えた透光膜からなるダミーパターン13が形成されている。
図4(a)〜(e)は、本発明の実施の形態1に係る入力装置の製造方法を示す工程断面図である。なお、図4(a)〜(e)には、透光性電極パターン、交差部および金属配線を纏めて示してあり、左側には図3(a)に相当する部分を示し、右側には図3(b)に相当する部分を示してある。
以上説明したように、本形態の入力装置10では、透光性基板15を平面視したときに、入力領域10a内には、第1の透光性電極パターン11および第2の透光性電極パターン12を構成する透光性導電膜が存在する領域と、かかる透光性導電膜が存在しない領域があって、これらの領域の間には反射率に差がある。従って、第1の透光性電極パターン11および第2の透光性電極パターン12の存在が目立ってしまうが、本形態では、第1の透光性電極パターン11および第2の透光性電極パターン12を構成する透光性導電膜が存在しない隙間14には、第1の透光性電極パターン11および第2の透光性電極パターン12と同等の屈折率を備えた透光膜からなるダミーパターン13が形成されている。このため、本形態によれば、第1の透光性電極パターン11、第2の透光性電極パターン12、およびダミーパターン13のいずれもが存在しない領域が極めて狭いため、第1の透光性電極パターン11および第2の透光性電極パターン12の存在が目立たない。
図5は、本発明の実施の形態2に係る入力装置に形成した第1の透光性電極パターンおよび第2の透光性電極パターンの平面的な構成を示す説明図である。図6(a)、(b)は各々、本発明の実施の形態2に係る入力装置の図5におけるA2−A2′断面図、および透光性電極パターンと金属配線との接続構造を示す断面図である。なお、本形態の基本的な構成は実施の形態1と同様であるため、共通する部分には同一の符号を付して図示することにしてそれらの説明を省略する。
図7(a)〜(e)は、本発明の実施の形態2に係る入力装置の製造方法を示す工程断面図である。なお、図7(a)〜(e)には、透光性電極パターン、交差部および金属配線を纏めて示してあり、左側には図6(a)に相当する部分を示し、右側には図6(b)に相当する部分を示してある。
以上説明したように、本形態でも、実施の形態1と同様、第1の透光性電極パターン11および第2の透光性電極パターン12を構成する透光性導電膜が存在しない隙間14には、第1の透光性電極パターン11および第2の透光性電極パターン12と同等の屈折率を備えた透光膜からなるダミーパターン13が形成されている。このため、第1の透光性電極パターン11、第2の透光性電極パターン12、およびダミーパターン13のいずれもが存在しない領域が極めて狭いので、第1の透光性電極パターン11および第2の透光性電極パターン12の存在が目立たないなど、実施の形態1と同様な効果を奏する。
図8は、本発明の実施の形態3に係る入力装置に形成した第1の透光性電極パターンおよび第2の透光性電極パターンの平面的な構成を示す説明図である。図9(a)、(b)は各々、本発明の実施の形態3に係る入力装置の図8におけるA3−A3′断面図、および透光性電極パターンと金属配線との接続構造を示す断面図である。なお、本形態の基本的な構成は実施の形態1と同様であるため、共通する部分には同一の符号を付して図示することにしてそれらの説明を省略する。
図10(a)〜(e)は、本発明の実施の形態3に係る入力装置の製造方法を示す工程断面図である。なお、図10(a)〜(e)には、透光性電極パターン、交差部および金属配線を纏めて示してあり、左側には図9(a)に相当する部分を示し、右側には図9(b)に相当する部分を示してある。
以上説明したように、本形態でも、実施の形態1と同様、第1の透光性電極パターン11および第2の透光性電極パターン12を構成する透光性導電膜が存在しない隙間14には、第1の透光性電極パターン11および第2の透光性電極パターン12と同等の屈折率を備えた透光膜からなるダミーパターン13が形成されている。このため、第1の透光性電極パターン11、第2の透光性電極パターン12、およびダミーパターン13のいずれもが存在しない領域が極めて狭いので、第1の透光性電極パターン11および第2の透光性電極パターン12の存在が目立たないなど、実施の形態1と同様な効果を奏する。
図11(a)、(b)は、本発明を適用した入力装置10に形成されるダミーパターン13の他の構成例を示す平面図である。
上記実施の形態1、2では、金属配線9aの端部をそのまま、端子19aとして利用したが、金属配線9aの端部の上層にITO層を中継電極5aと同時形成し、端子19aとしてもよい。また、実施の形態2、3では、入力領域10aのみに層間絶縁膜4bを形成したが、端子19aの表面を除く略全面に層間絶縁膜4bを形成してもよい。
次に、上述した実施形態に係る入力装置付き表示装置100を適用した電子機器について説明する。図12(a)に、入力装置付き表示装置100を備えたモバイル型のパーソナルコンピュータの構成を示す。パーソナルコンピュータ2000は、表示ユニットとしての入力装置付き表示装置100と本体部2010を備える。本体部2010には、電源スイッチ2001及びキーボード2002が設けられている。図12(b)に、入力装置付き表示装置100を備えた携帯電話機の構成を示す。携帯電話機3000は、複数の操作ボタン3001及びスクロールボタン3002、並びに表示ユニットとしての入力装置付き表示装置100を備える。スクロールボタン3002を操作することによって、入力装置付き表示装置100に表示される画面がスクロールされる。図12(c)に、入力装置付き表示装置100を適用した情報携帯端末(PDA:Personal Digital Assistants)の構成を示す。情報携帯端末4000は、複数の操作ボタン4001及び電源スイッチ4002、並びに表示ユニットとしての入力装置付き表示装置100を備える。電源スイッチ4002を操作すると、住所録やスケジュール帳といった各種の情報が入力装置付き表示装置100に表示される。
Claims (11)
- 透光性基板の入力領域に、第1の方向に延在する複数の第1の透光性電極と、前記第1の方向に交差する第2の方向に延在する複数の第2の透光性電極とが形成された静電容量型入力装置において、
前記透光性基板を平面視したときに、前記第1の透光性電極と前記第2の透光性電極とに挟まれた領域には、前記第1の透光性電極および前記第2の透光性電極と同等の屈折率を備えた透光膜からなるダミーパターンが形成され、
前記第1の透光性電極、前記第2の透光性電極、および前記ダミーパターンは、前記透光性基板の同一面側において同一の絶縁層上に形成されていることを特徴とする静電容量型入力装置。 - 前記ダミーパターンは、前記第1の透光性電極および前記第2の透光性電極の双方から絶縁状態に形成されている請求項1に記載の静電容量型入力装置。
- 前記第1の透光性電極、前記第2の透光性電極、および前記ダミーパターンは、単層膜からなる同一の透光性導電膜により形成されている
請求項1または請求項2に記載の静電容量型入力装置。 - 前記第1の透光性電極および前記第2の透光性電極は各々、前記第1の透光性電極と前記第2の透光性電極との交差部分で挟まれた領域に大面積部分を備え、
前記第1の透光性電極と前記第2の透光性電極との間には、互いの前記大面積部分に挟まれたスリット状の隙間が複数形成されており、
前記ダミーパターンは、前記隙間内に形成されている
請求項1乃至請求項3の何れか1つに記載の静電容量型入力装置。 - 前記大面積部分が菱形に形成されている
請求項4に記載の静電容量型入力装置。 - 前記ダミーパターンは、前記複数の隙間毎に独立して形成されている
請求項4に記載の静電容量型入力装置。 - 前記ダミーパターンは、前記隙間内において当該隙間の幅方向で並列した状態で当該隙間の長手方向に複数延在している
請求項4に記載の静電容量型入力装置。 - 前記ダミーパターンは、1つの前記スリット状の隙間内において当該隙間の長手方向において分割されて複数配置されている
請求項4に記載の静電容量型入力装置。 - 前記隙間の幅方向において、前記大面積部分と前記ダミーパターンとの間に形成されるスペースの幅寸法は30μm以下であり、かつ、スペースの幅寸法の総和は50μm以下である
請求項4乃至請求項8の何れか1つに記載の静電容量型入力装置。 - 前記交差部分では、前記第1の透光性電極および前記第2の透光性電極のうちの一方の透光性電極が互いに繋がっている一方、他方の透光性電極は互いに途切れており、
少なくとも前記交差部分における前記一方の透光性電極の上層側あるいは下層側に透光性の層間絶縁膜が形成されているとともに、
当該層間絶縁膜に対する上層側および下層側のうち、前記第1の透光性電極および前記第2の透光性電極が形成されている側とは反対側には、前記交差部分で途切れている前記他方の透光性電極同士を電気的に接続する透光性の中継電極が形成されている
請求項1乃至請求項9の何れか1つに記載の静電容量型入力装置。 - 請求項1乃至請求項10の何れか1つに記載の静電容量型入力装置を備えた入力機能付き表示装置であって、
前記静電容量型入力装置における入力面とは反対側に画像生成装置が重ねて配置されていることを特徴とする入力機能付き表示装置。
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US12/417,157 US8400418B2 (en) | 2008-06-18 | 2009-04-02 | Capacitance type input device and display device with input function |
KR1020090045849A KR101086559B1 (ko) | 2008-06-18 | 2009-05-26 | 정전 용량형 입력 장치 및 입력 기능을 갖는 표시 장치 |
CNA2009101459771A CN101609384A (zh) | 2008-06-18 | 2009-06-15 | 静电电容式输入装置以及带输入功能的显示装置 |
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US8400418B2 (en) | 2013-03-19 |
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