JP7381508B2 - 表示装置 - Google Patents
表示装置 Download PDFInfo
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- JP7381508B2 JP7381508B2 JP2020571924A JP2020571924A JP7381508B2 JP 7381508 B2 JP7381508 B2 JP 7381508B2 JP 2020571924 A JP2020571924 A JP 2020571924A JP 2020571924 A JP2020571924 A JP 2020571924A JP 7381508 B2 JP7381508 B2 JP 7381508B2
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- light
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- display device
- light emitting
- emitting element
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
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- H05B33/12—Light sources with substantially two-dimensional radiating surfaces
- H05B33/26—Light sources with substantially two-dimensional radiating surfaces characterised by the composition or arrangement of the conductive material used as an electrode
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- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
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- H10K50/86—Arrangements for improving contrast, e.g. preventing reflection of ambient light
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Description
図2Aは、表示装置の一例を示す断面図である。図2B、図2Cは、樹脂層の上面レイアウトの一例を示す図である。
図3A、図3Bは、表示装置の一例を示す断面図である。
図4A~図4Cは、表示装置の一例を示す断面図である。
図5A~図5Cは、表示装置の一例を示す断面図である。
図6Aは、表示装置の一例を示す上面図である。図6Bは、表示装置の一例を示す断面図である。
図7A、図7Bは、表示装置の一例を示す断面図である。
図8Aは、表示装置の一例を示す上面図である。図8Bは、表示装置の一例を示す断面図である。
図9Aは、表示装置の一例を示す上面図である。図9Bは、表示装置の一例を示す断面図である。
図10A、図10Bは、表示装置の一例を示す断面図である。
図11A、図11Bは、表示装置の一例を示す断面図である。
図12は、表示装置の一例を示す斜視図である。
図13は、表示装置の一例を示す断面図である。
図14A、図14Bは、表示装置の一例を示す断面図である。
図15は、表示装置の一例を示す断面図である。
図16Aは、表示装置の一例を示す断面図である。図16Bは、トランジスタの一例を示す断面図である。
図17A、図17Bは、画素回路の一例を示す回路図である。
図18Aは、画素の一例を示すブロック図である。図18Bは、画素回路の一例を示す回路図である。
図19A、図19Bは、電子機器の一例を示す図である。
図20A~図20Dは、電子機器の一例を示す図である。
図21A~図21Fは、電子機器の一例を示す図である。
図22は、実施例1の評価用デバイスの上面写真である。
図23A、図23Bは、実施例1の評価用デバイスの断面観察写真である。
図24は、実施例1の表示装置の表示結果を示す写真である。
図25A、図25Bは、実施例1の評価用デバイスの断面観察写真である。
図26は、実施例2の表示装置の画素を構成するデバイス構造を示す図である。
図27A、図27Bは、実施例2の表示装置の表示結果を示す写真である。
図28は、実施例2の表示装置の迷光の検出結果を示すグラフである。
図29は、実施例2の表示装置の迷光の検出結果を示すグラフである。
図30は、実施例2の表示装置の撮像光学系を示す図である。
図31は、実施例2の表示装置の撮像範囲の計算結果を示すグラフである。
図32A、図32Bは、実施例2の表示装置の撮像結果を示す写真である。
図33は、実施例2の表示装置の撮像結果を示すグラフである。
図34Aは、実施例2の表示装置を用いた撮像の様子を示す写真である。図34Bは、実施例2の表示装置の撮像結果を示す写真である。
図35Aは、実施例2の表示装置を用いた撮像の様子を示す写真である。図35Bは、実施例2の表示装置の撮像結果を示す写真である。
図36は、実施例3のデバイスの電流密度-電圧特性を示すグラフである。
図37A、図37Bは、実施例4のデバイスの電流密度-電圧特性を示すグラフである。
図38A、図38Bは、実施例4のデバイスの外部量子効率の波長依存性を示すグラフである。
図39は、実施例5のデバイスの外部量子効率の波長依存性を示すグラフである。
図40は、実施例5のデバイスの外部量子効率の温度依存性を示すグラフである。
図41は、実施例6のデバイスの外部量子効率の波長依存性を示すグラフである。
図42は、実施例6のデバイスの電流密度-電圧特性を示すグラフである。
図43A~図43Cは、実施例7のデバイスの信頼性試験の結果を示すグラフである。
図44は、実施例7のデバイスの信頼性試験の結果を示すグラフである。
図45は、実施例7のデバイスの信頼性試験の結果を示すグラフである。
本実施の形態では、本発明の一態様の表示装置について図1~図16を用いて説明する。
図1E~図1Iに、画素の一例を示す。
図2Aに表示装置10Aの断面図を示す。
図3Aに表示装置10Bの断面図を示す。なお、以降の表示装置の説明において、先に説明した表示装置と同様の構成については、説明を省略することがある。
図3Bに表示装置10Cの断面図を示す。
図4Aに表示装置10Dの断面図を示す。
図4Bに表示装置10Eの断面図を示す。
図4Cに表示装置10Fの断面図を示す。図5Aに表示装置10Gの断面図を示す。図5Bに表示装置10Hの断面図を示す。
図5Cに表示装置10Jの断面図を示す。
図6Aに、表示装置10Kの上面図を示す。図6Bに、図6Aにおける一点鎖線A1-A2間の断面図を示す。図7Aに、図6Aにおける一点鎖線A3-A4間の断面図を示す。
図7Bに、表示装置10Lの断面図を示す。
図8Aに、表示装置10Mの上面図を示す。図8Bに、図8Aにおける一点鎖線A5-A6間の断面図を示す。
図9Aに、表示装置10Nの上面図を示す。図9Bに、図9Aにおける一点鎖線A7-A8間の断面図を示す。図10Aに、図9Aにおける一点鎖線A9-A10間の断面図を示す。
図10Bに、表示装置10Pの断面図を示す。
図11A及び図11Bに、表示装置10Qの断面図を示す。表示装置10Qは、表示装置10K(図6A)と同様の上面構造を適用することができる。図11Aに、図6Aにおける一点鎖線A1-A2間の断面図を示す。図11Bに、図6Aにおける一点鎖線A3-A4間の断面図を示す。
図12に、表示装置100Aの斜視図を示し、図13に、表示装置100Aの断面図を示す。
図14Aに、表示装置100Bの断面図を示す。
図15及び図16Aに、表示装置100Cの断面図を示す。表示装置100Cの斜視図は表示装置100A(図12)と同様である。図15には、表示装置100Cの、FPC172を含む領域の一部、回路164の一部、及び、表示部162の一部をそれぞれ切断したときの断面の一例を示す。図16Aには、表示装置100Cの、表示部162の一部を切断したときの断面の一例を示す。図15では、表示部162のうち、特に、受光素子110と赤色の光を発する発光素子190Rを含む領域を切断したときの断面の一例を示す。図16Aでは、表示部162のうち、特に、緑色の光を発する発光素子190Gと青色の光を発する発光素子190Bを含む領域を切断したときの断面の一例を示す。
以下では、半導体層に適用可能な金属酸化物について説明する。
本実施の形態では、本発明の一態様の表示装置について、図17及び図18を用いて説明する。
本発明の一態様の表示装置は、受光素子を有する第1の画素回路と、発光素子を有する第2の画素回路と、を有する。第1の画素回路と第2の画素回路は、それぞれ、マトリクス状に配置される。
図18Aに画素のブロック図を示す。図18Aに示す画素は、スイッチングトランジスタ(Switching Tr)、駆動トランジスタ(Driving Tr)、発光素子(OLED)に加えて、メモリ(Memory)を有する。
本実施の形態では、本発明の一態様の電子機器について、図19~図21を用いて説明する。
図26に、表示装置の画素を構成するデバイス構造を示す。
本実施例では、画面サイズが対角3.07インチ、画素数が360(H)×540(V)、画素ピッチが120μm×120μm、精細度が212ppiである、アクティブマトリクス型の表示装置を作製した。ゲートドライバは内蔵し、ソースドライバは外付けのICをCOG方式により実装した。読み出し回路は、アナログ電圧順次出力とした。
図27A及び図27Bに、本実施例の表示装置の表示結果を示す。図27Aは、基板151にガラス基板を用いた表示装置の表示結果である。図27Bは、基板151に樹脂基板を用いた可撓性を有する表示装置の表示結果である。図27A及び図27Bに示すように、表示部に、受光素子及び発光素子を有する表示装置において、画像を良好に表示できることが確認された。さらに、図27Bに示すように、受光素子及び発光素子を有する表示部の可撓性を高めることができ、表示部を曲げた状態においても、画像を良好に表示できることが確認された。
本実施例の表示装置では、有機EL素子OLEDの発光が対象物によって反射された光を有機フォトダイオードOPDは検出する。しかし、有機EL素子OLEDの発光が、表示装置内で反射され、対象物を介さずに、有機フォトダイオードOPDに入射されてしまう場合がある。このような迷光は撮像時にノイズとなり、S/N比を低下させる要因となる。本実施例の表示装置では、対向基板側と支持基板側との双方に、遮光層を配置し、迷光の影響の抑制を図った。
本実施例の表示装置において、有機EL素子OLEDが発する光を光源に、有機フォトダイオードOPDを用いて撮像した結果を示す。本実施例では、指紋の撮像とカラー画像のスキャニングを行った。
表1に示すように、デバイス1では、第1の電極として、厚さ約100nmの、銀(Ag)とパラジウム(Pd)と銅(Cu)の合金(Ag-Pd-Cu(APC))膜、及び、厚さ約100nmの、酸化珪素を含むインジウム錫酸化物(ITSO)膜の2層構造を用いた。
表1に示すように、比較デバイス2は、第1の電極として、厚さ約50nmのチタン膜、厚さ約200nmのアルミニウム膜、及び厚さ約5nmのチタン膜の3層構造を用いた。
図36に、デバイス1及び比較デバイス2の電流密度-電圧特性を評価した結果を示す。図36において、縦軸は電圧(V)を表し、横軸は電流密度(A/cm2)を表す。
図37A、図37Bに、デバイス3~デバイス6の電流密度-電圧特性を評価した結果を示す。図37A、図37Bにおいて、縦軸は電圧(V)を表し、横軸は電流密度(μA/cm2)を表す。
図38A、図38Bに、デバイス3~デバイス6の外部量子効率の波長依存性を評価した結果を示す。図38A、図38Bにおいて、縦軸は外部量子効率(%)を表し、横軸は波長(nm)を表す。
Claims (8)
- 第1の基板と、第2の基板との間に、受光素子と、第1の発光素子と、樹脂層と、第1の遮光層と、接着層と、を有し、
前記受光素子は、前記第1の基板上の第1の画素電極、前記第1の画素電極上の活性層、及び前記活性層上の共通電極を有し、
前記第1の発光素子は、前記第1の基板上の第2の画素電極、前記第2の画素電極上の第1の発光層、及び前記第1の発光層上の前記共通電極を有し、
前記樹脂層及び前記第1の遮光層は、それぞれ、前記共通電極と前記第2の基板との間に位置し、
前記樹脂層は、前記受光素子と重なる開口を有し、
前記樹脂層は、前記第1の発光素子と重なる部分を有し、
前記第1の遮光層は、前記共通電極と前記樹脂層との間に位置する部分を有し、
前記接着層は、前記共通電極と前記第2の基板との間に位置し、
前記接着層は、前記受光素子と重なる第1の部分と、前記第1の発光素子と重なる第2の部分と、を有し、
前記第1の部分は、前記第2の部分に比べて厚い、表示装置。 - 請求項1において、
前記第1の遮光層は、前記開口の少なくとも一部を覆う領域と、前記開口にて露出している前記樹脂層の側面の少なくとも一部を覆う領域とを有する、表示装置。 - 第1の基板と、第2の基板との間に、受光素子と、第1の発光素子と、樹脂層と、第1の遮光層と、接着層と、を有し、
前記受光素子は、前記第1の基板上の第1の画素電極、前記第1の画素電極上の活性層、及び、
前記活性層上の共通電極を有し、
前記第1の発光素子は、前記第1の基板上の第2の画素電極、前記第2の画素電極上の第1の発光層、及び、前記第1の発光層上の前記共通電極を有し、
前記樹脂層及び前記第1の遮光層は、それぞれ、前記共通電極と前記第2の基板との間に位置し、
前記樹脂層は、島状に設けられ、かつ、前記第1の発光素子と重なる部分を有し、
前記第1の遮光層は、前記共通電極と前記樹脂層との間に位置する部分を有し、
前記第2の基板を通過した光の少なくとも一部は、前記樹脂層を介さずに、前記受光素子に入射し、
前記接着層は、前記共通電極と前記第2の基板との間に位置し、
前記接着層は、前記受光素子と重なる第1の部分と、前記第1の発光素子と重なる第2の部分と、を有し、
前記第1の部分は、前記第2の部分に比べて厚い、表示装置。 - 請求項3において、
前記第1の遮光層は、前記樹脂層の側面の少なくとも一部を覆う領域とを有する、表示装置。 - 請求項1乃至4のいずれか一において、
さらに、共通層を有し、
前記共通層は、前記第1の画素電極と前記共通電極との間に位置する部分と、前記第2の画素電極と前記共通電極との間に位置する部分と、を有する、表示装置。 - 請求項1乃至5のいずれか一において、
さらに、隔壁を有し、
前記隔壁は、前記第1の画素電極の端部及び前記第2の画素電極の端部を覆い、
前記隔壁は、前記第1の発光素子が発した光の少なくとも一部を吸収する機能を有する、表示装置。 - 請求項1乃至5のいずれか一において、
さらに、隔壁及び第2の遮光層を有し、
前記隔壁は、前記第1の画素電極の端部及び前記第2の画素電極の端部を覆い、
前記第2の遮光層は、前記隔壁と前記第1の遮光層との間に位置する部分を有し、かつ、前記第1の発光素子が発した光の少なくとも一部を吸収する機能を有する、表示装置。 - 請求項7において、
上面視において、前記隔壁は、前記受光素子と前記第1の発光素子との間に開口を有し、
前記第2の遮光層は、前記隔壁の開口を覆う、表示装置。
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2020
- 2020-02-03 DE DE112020000840.1T patent/DE112020000840T5/de active Pending
- 2020-02-03 US US17/428,736 patent/US20220173174A1/en active Pending
- 2020-02-03 WO PCT/IB2020/050823 patent/WO2020165686A1/ja active Application Filing
- 2020-02-03 JP JP2020571924A patent/JP7381508B2/ja active Active
- 2020-02-03 CN CN202080012674.7A patent/CN113383611A/zh active Pending
- 2020-02-03 KR KR1020217028589A patent/KR20210126649A/ko unknown
- 2020-02-06 TW TW109103683A patent/TW202105788A/zh unknown
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2023
- 2023-11-02 JP JP2023188305A patent/JP2024003095A/ja active Pending
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JP2010153834A (ja) | 2008-11-28 | 2010-07-08 | Semiconductor Energy Lab Co Ltd | フォトセンサ及び表示装置 |
JP2017208173A (ja) | 2016-05-16 | 2017-11-24 | 株式会社ジャパンディスプレイ | 表示装置 |
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DE112020000840T5 (de) | 2021-11-11 |
JP2024003095A (ja) | 2024-01-11 |
US20220173174A1 (en) | 2022-06-02 |
JPWO2020165686A1 (ja) | 2020-08-20 |
KR20210126649A (ko) | 2021-10-20 |
CN113383611A (zh) | 2021-09-10 |
TW202105788A (zh) | 2021-02-01 |
WO2020165686A1 (ja) | 2020-08-20 |
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