JP6942602B2 - 表示装置の製造方法 - Google Patents
表示装置の製造方法 Download PDFInfo
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- JP6942602B2 JP6942602B2 JP2017202379A JP2017202379A JP6942602B2 JP 6942602 B2 JP6942602 B2 JP 6942602B2 JP 2017202379 A JP2017202379 A JP 2017202379A JP 2017202379 A JP2017202379 A JP 2017202379A JP 6942602 B2 JP6942602 B2 JP 6942602B2
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- Human Computer Interaction (AREA)
- Electroluminescent Light Sources (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Description
<1.表示装置の構成>
図1は、本発明の実施形態に係る表示装置10の上面図を示す。
図2は、タッチセンサ20を示す上面図である。タッチセンサ20は、ここでは、相互容量方式のタッチセンサである。タッチセンサ20は、複数の第1センサ電極210A、及び複数の第2センサ電極210Bを含む。複数の第1センサ電極210A、及び複数の第2センサ電極210Bの各々は、表示領域102と重なる。複数の第1センサ電極210Aと複数の第2センサ電極210Bとは互いに絶縁されている。
駆動回路108は、複数の第1タッチセンサ配線212Aを介して、第1センサ電極210Aに電圧を供給する。第1センサ電極210Aと第2センサ電極210Bとの間には、この供給した電圧に応じた電界が発生する。例えば、人の指が表示装置10に触れたとき、第1センサ電極210Aと第2センサ電極210Bとの間の電界が変化する。これにより、第1タッチセンサ配線212Aと第2タッチセンサ配線212Bとの間の容量が変化する。駆動回路108は、複数の第2タッチセンサ配線212Bを介して、第2センサ電極210Bからの信号の入力を受け付ける。表示装置10は、この信号に基づいて、人の指が触れた位置を検知する。この場合は、駆動回路108は、第1センサ電極210Aを駆動して、第2センサ電極210Bを介して容量値の変化を読み取っている。駆動回路108は、逆に、第2センサ電極210Bを駆動して、第1センサ電極210Aを介して容量値の変化を読み取ってもよい。
図4は、表示装置10の断面図を示す。図4は、図3における切断線X1−X2に沿った断面図である。切断線X1−X2は、センサ電極210、ブリッジ部214A、引出配線216、端子部107,109を通過する切断線を示す。
図7は、実施形態2に係る表示装置10のタッチセンサ20の一部である領域20Rを拡大した上面図である。図8は、図7における切断線X3−X4に沿った断面図である。切断線X3−X4は、センサ電極210、ブリッジ部214A、引出配線216、端子部107,109を通過する切断線を示す。図9は、端子部109の付近を拡大した断面図である。この実施形態では、封止層180は、複数の端子部109の各々に対応した開口部300を有する。封止層180が、端子部109のすべての端部の上に設けられているように、開口部300が形成されている。また、図8に示すように、封止層180は、酸化物導電層250の少なくとも一部の端部の上に設けられている。そして、フレキシブルプリント基板106は、封止層180が設けられた酸化物導電層250の端部の上に設けられ、酸化物導電層250と電気的に接続する。これにより、端子部107においても端子配線220の損傷を抑える効果が期待できる。
図10は、実施形態3に係る端子部109の付近を拡大した断面図である。実施例3では、層間絶縁膜190が、酸化物導電層230に重なる領域P3,P4に設けられている。また、引出配線216は、直下に層間絶縁膜190が存在するように、層間絶縁膜190の上に設けられている。よって、引出配線216が形成される部分の下地が均一化され、引出配線216と下地との密着力が均一化されやすくなる。その結果、配線形成でのCD(Critical Dimension)のばらつきが軽減される。また、酸化物導電層230を露出させる層間絶縁膜190の開口部400は、封止層180の開口部500よりも小さい。これにより、周縁領域104の縮小化が可能となる。
図11は、実施形態4に係る端子部109の付近を拡大した断面図である。この実施形態では、酸化物導電層230と引出配線216との間に配線層260(第3配線)を備える。配線層260は、端子配線220、第1無機膜182及び第2無機膜186の上に設けられている。配線層260は、センサ電極210と同じ材料で形成されてもよいし、別の材料で形成されてもよい。引出配線216は、配線層260及び酸化物導電層230を介して、端子配線220と電気的に接続する。配線層260の存在により端子配線220の損傷の可能性は、より低くなる。
表示装置10の製造方法の一例を説明する。図12〜図18は、実施形態1に係る表示装置10の製造方法を説明する図である。
上述した実施形態は、互いに組み合わせたり、置換したりして適用することが可能である。また、上述した実施形態では、以下の通り変形して実施することも可能である。
第1センサ電極210A及び第2センサ電極210Bは、透光性の電極でなくてもよい。図19は、この変形例に係るタッチセンサ20の一部を示す上面図である。具体的には、第1センサ電極210A及び第2センサ電極210Bは、非透光性の材料を用いて形成されている。非透光性の材料は、ここでは低抵抗の金属材料である。この場合、第1センサ電極210Aは金属膜である。第1センサ電極210Aは、メッシュ状に形成されている。金属材料は、例えば、アルミニウム(Al)である。金属材料は、アルミニウム(Al)に限定されず、金(Au)、銀(Ag)、銅(Cu)、パラジウム(Pd)、タングステン(W)又はチタン(Ti)であってもよい。
上述した実施形態で説明した構成の一部が省略又は変更されてもよい。例えば、各図で説明した表示装置10の断面構造から、一部の層が除外されてもよいし、別の層が設けられてもよい。また、複数の画素130を駆動するフレキシブルプリント基板と、タッチセンサ20を駆動するフレキシブルプリント基板とが、別個に設けられてもよい。
上述した実施形態では、開示例として有機EL表示装置の場合を例示したが、その他の適用例として、液晶表示装置、その他の自発光型表示装置、あるいは電気泳動表示素子等を有する電子ペーパー型表示装置、あらゆるフラットパネル型の表示装置が挙げられる。
Claims (9)
- 基板の上に設けられた複数の画素を含む表示領域を囲む周縁領域に第1配線を形成し、
前記第1配線の一部と重なる第1絶縁層を形成し、
前記第1配線の上に、前記第1配線と電気的に接続する第1酸化物導電層を形成し、
前記表示領域及び前記周縁領域と重なり、前記複数の画素を封止する、封止層を形成し、
前記第1酸化物導電層の一部を露出させ、前記第1酸化物導電層の少なくとも一部の端部に重なるように前記封止層をエッチングし、
前記封止層の上に、前記基板上の前記複数の画素を含む表示領域と重なるセンサ電極を形成し、
前記封止層が設けられた前記端部の上を通過して、前記センサ電極と前記第1酸化物導電層とを電気的に接続させる第2配線を形成する、
表示装置の製造方法。 - 前記封止層は、前記第1酸化物導電層のすべての端部の上に設けられている、請求項1に記載の表示装置の製造方法。
- 前記封止層をエッチングした後に、前記封止層の上に第2絶縁層を形成することを含む、請求項1又は請求項2に記載の表示装置の製造方法。
- 前記第1酸化物導電層を露出させる前記第2絶縁層の開口部を含み、前記封止層の端部は、前記開口部の端部と前記表示領域との間に設けられる、請求項3に記載の表示装置の製造方法。
- 前記封止層をエッチングした後に、前記第1酸化物導電層の上に前記封止層の少なくとも一部の端部に重なるように、第3配線を形成することを含む、請求項1から請求項4のいずれか1項に記載の表示装置の製造方法。
- 前記第2配線を形成した後に、前記第1配線と電気的に接続し、前記複数の画素及び前記センサ電極を含むタッチセンサを駆動するフレキシブルプリント基板を前記基板に接続することを含む、請求項1から請求項5のいずれか1項に記載の表示装置の製造方法。
- 前記第1絶縁層の上に、前記第1配線と電気的に接続する第2酸化物導電層を前記第1酸化物導電層とともに形成し、
前記封止層を形成した後に、前記第2酸化物導電層の一部を露出させ、前記第2酸化物導電層の少なくとも一部の端部に重なるように前記封止層をエッチングし、
前記第2配線を形成した後に、前記センサ電極を含むタッチセンサを駆動するフレキシブルプリント基板を、前記第2酸化物導電層と電気的に接続する、
請求項1から請求項6のいずれか1項に記載の表示装置の製造方法。 - 前記センサ電極は、第1センサ電極及び第2センサ電極を備え、前記第1センサ電極及び前記第2センサ電極は互いに絶縁され、かつ同一の絶縁表面に設けられている、請求項1から請求項7のいずれか1項に記載の表示装置の製造方法。
- 前記第1絶縁層は、有機物を含む層である、請求項1から請求項7のいずれか1項に記載の表示装置の製造方法。
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