JPWO2020065472A1 - 表示装置の作製方法、表示装置の作製装置 - Google Patents
表示装置の作製方法、表示装置の作製装置 Download PDFInfo
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Abstract
Description
図2A1、図2B1は、表示装置の作製方法を示す斜視図である。図2A2、図2B2は、表示装置の作製方法を示す断面図である。
図3A1、図3B1は、表示装置の作製方法を示す斜視図である。図3A2、図3B2は、表示装置の作製方法を示す断面図である。
図4A1、図4B1は、表示装置の作製方法を示す斜視図である。図4A2、図4B2は、表示装置の作製方法を示す断面図である。
図5A1、図5B1は、表示装置の作製方法を示す斜視図である。図5A2、図5B2は、表示装置の作製方法を示す断面図である。
図6A1、図6B1は、表示装置の作製方法を示す斜視図である。図6A2、図6B2は、表示装置の作製方法を示す断面図である。
図7は、装置の斜視図である。
図8は、装置の構成を示す概略図である。
図9A、図9B、図9Cは、表示装置の作製方法を示す断面図である。
図10A、図10B、図10C、図10Dは、表示装置の作製方法を示す断面図である。図11は、装置の斜視図である。
図12A、図12B、図12Cは、表示装置の構成例を示す。
図13A、図13B、図13Cは、表示装置の構成例を示す。
図14A、図14B、図14Cは、発光素子の構成例を示す。
図15A、図15B、図15Cは、発光素子の構成例を示す。
図16A、図16B、図16Cは、表示装置の構成例を示す。
図17A、図17B、図17Cは、表示装置の上面図である。
図18は、表示装置の断面図である。
図19は、表示装置の断面図である。
図20A、図20B、図20Cは、表示装置の作製方法を説明する図である。
図21A、図21Bは、表示装置の作製方法を説明する図である。
図22は、表示装置の作製方法を説明する図である。
図23A、図23Bは、表示装置の作製方法を説明する図である。
図24は、表示装置の断面図である。
図25A、図25Bは、表示装置の作製方法を説明する図である。
図26A、図26Bは、表示装置の作製方法を説明する図である。
図27A1、図27A2、図27B1、図27B2、図27C1、図27C2は、トランジスタを説明する図である。
図28A1、図28A2、図28B1、図28B2、図28C1、図28C2は、トランジスタを説明する図である。
図29A1、図29A2、図29B1、図29B2、図29C1、図29C2は、トランジスタを説明する図である。
図30A1、図30A2、図30B1、図30B2、図30C1、図30C2は、トランジスタを説明する図である。
図31Aは、表示装置のブロック図である。図31Bは表示装置の回路図である。
図32A、図32B、図32Cは、表示装置の回路図である。
図33A、図33C、図33Dは、表示装置の回路図である。図33Bは表示装置のタイミングチャートである。
図34A、図34B、図34C、図34D、図34Eは、情報処理装置を説明する図である。
図35A、図35B、図35C、図35D、図35Eは、情報処理装置を説明する図である。
本実施の形態では、本発明の一態様である表示装置の作製方法、表示装置の作製装置について、説明する。
本実施の形態では、実施の形態1に示した本発明の一態様の表示装置の作製方法を用いて作製できる、表示装置の一例について説明する。
本発明の一態様である表示装置の作製方法を用いて作製できる表示装置10の断面構成の一例を、図12Aに示す。
前述の表示装置と異なる構成について説明する。本発明の一態様である表示装置が有する発光素子17として、LEDパッケージを用いることができる。
本実施の形態では、先の実施の形態で例示した表示装置の一例について、詳細を説明する。
図17Aに、表示装置700の上面図を示す。表示装置700は、シール材712により貼り合された第1の基板701と第2の基板705を有する。また第1の基板701、第2の基板705、及びシール材712で封止される領域において、第1の基板701上に画素部702、ソースドライバ回路部704、及びゲートドライバ回路部706が設けられる。また画素部702には、複数の表示素子が設けられる。
図18は、図17Aに示す一点鎖線Q−Rにおける断面図である。
まず、基板701上に導電層301、導電層303及び導電層305を形成する。導電層301、導電層303及び導電層305は、導電膜を成膜した後、レジストマスクを形成し、当該導電膜をエッチングした後にレジストマスクを除去することにより形成できる。
続いて、絶縁層770を形成する。絶縁層770に感光性の材料を用いることで、フォトリソグラフィ法等により開口を形成できる。なお絶縁層770として、絶縁膜を成膜した後に、レジストマスクを用いて絶縁膜の一部をエッチングして開口を形成してもよい。絶縁層770は、有機絶縁材料を用いると、その上面の平坦性を高めることができるため好ましい。
続いて、絶縁層770上に導電層772及び導電層774を形成する(図21A)。導電層772は、絶縁層770が有する開口を介してトランジスタ750と電気的に接続される。導電層772及び導電層774は、導電層301等と同様の方法により形成できる。導電層772及び導電層774は、光に対して反射性を有する材料を用いることが好ましい。例えば、導電層772及び導電層774として、銀、パラジウム及び銅の合金(APCともいう)、アルミニウム、チタン、銅等を含む材料を用いることができる。
続いて、発光素子782を、バンプ791及びバンプ793上に配置する。発光素子782として、図14に例示した水平構造、フェイスダウン型のLEDチップを用いることが好ましい。配置の際、発光素子782の陰極側の電極と、陽極側の電極がそれぞれバンプ791及びバンプ793と接するように発光素子782を配置する。バンプ791、バンプ793、発光素子782、導電層772及び導電層774が圧接され、導電層772及び導電層774上に発光素子782が固定される。それとともに、導電層772及び導電層774と、発光素子782とが電気的に接続される(図22)。
続いて、絶縁層770、発光素子782上に遮光層795となる遮光膜を形成する(図22)。遮光膜として、金属材料、顔料または染料を含む樹脂を用い、フォトリソグラフィ法等により形成することができる。この時、発光素子782上にも遮光膜が形成されるように、該遮光膜の厚さを調整する。
続いて、基板705上に遮光層738及び着色層736を形成する。
続いて、基板701と基板705のいずれか一方、または両方に、これらを接着する接着層を形成する。接着層は、画素が配置されている領域を囲むように形成する。接着層は、例えばスクリーン印刷法、ディスペンス法等により形成できる。接着層としては、熱硬化性樹脂や紫外線硬化樹脂等を用いることができる。また、紫外線により仮硬化した後に、熱を加えることにより硬化する樹脂などを用いてもよい。または、接着層として、紫外線硬化性と熱硬化性の両方を有する樹脂などを用いてもよい。
先に示した表示装置700と異なる構成例を図24に示す。図24は、図17Aに示す一点鎖線Q−Rにおける断面図である。図24に示す表示装置700Aは、発光素子782として図15に例示したLEDパッケージを有し、また遮光層795及び蛍光体層797を有さない点で、図18に示す表示装置700と主に相違している。
続いて、絶縁層770上に導電層772及び導電層774を形成する(図25A)。導電層772は、絶縁層770が有する開口を介してトランジスタ750と電気的に接続される。導電層772及び導電層774は、導電層301等と同様の方法により形成できる。
続いて、発光素子782を、バンプ791及びバンプ793上に配置する。発光素子782として、図15に例示した表面実装型のLEDパッケージを用いることが好ましい。配置の際、発光素子782の陰極側の電極と、陽極側の電極がそれぞれバンプ791及びバンプ793と接するように発光素子782を配置する。バンプ791、バンプ793、発光素子782、導電層772及び導電層774が圧接され、導電層772及び導電層774上に発光素子782が固定される。それとともに、導電層772及び導電層774と、発光素子782とが電気的に接続される(図26A)。
続いて、基板705上に遮光層738及び着色層736を形成する(図26B)。遮光層738及び着色層736は、前述の表示装置700の作製方法の説明を援用できるため、詳細な説明は省略する。
続いて、基板701と基板705のいずれか一方、または両方に、これらを接着する接着層を形成する。基板701と基板705の貼り合せは、前述の表示装置700の作製方法の説明を援用できるため、詳細な説明は省略する。
また、図18、図19及び図24に示す表示装置に入力装置を設けてもよい。当該入力装置としては、例えば、タッチセンサ等が挙げられる。
本実施の形態では、先の実施の形態に示した表示装置に用いることができるトランジスタの一例について、説明する。
図27A1は、ボトムゲート型のトランジスタの一種であるチャネル保護型のトランジスタ1810のチャネル長方向の断面図である。図27A1において、トランジスタ1810は基板1771上に形成されている。また、トランジスタ1810は、基板1771上に絶縁層1772を介して電極1746を有する。また、電極1746上に絶縁層1726を介して半導体層1742を有する。電極1746はゲート電極として機能できる。絶縁層1726はゲート絶縁層として機能できる。
図29A1に例示するトランジスタ1842は、トップゲート型のトランジスタの1つである。トランジスタ1842は、絶縁層1729を形成した後に電極1744aおよび電極1744bを形成する点がトランジスタ1810やトランジスタ1820と異なる。電極1744aおよび電極1744bは、絶縁層1728および絶縁層1729に形成した開口部において半導体層1742と電気的に接続する。
本実施の形態では、本発明の一態様である表示装置について、説明する。
画素に表示される階調を補正するためのメモリを備える画素回路と、これを有する表示装置について説明する。先の実施の形態で例示したトランジスタは、以下で例示する画素回路に用いられるトランジスタに適用することができる。
図33Aに、画素回路400の回路図を示す。画素回路400は、トランジスタM1、トランジスタM2、容量C1、及び回路401を有する。また画素回路400には、配線S1、配線S2、配線G1、及び配線G2が接続される。
続いて、図33Bを用いて、画素回路400の動作方法の一例を説明する。図33Bは、画素回路400の動作に係るタイミングチャートである。なおここでは説明を容易にするため、配線抵抗などの各種抵抗や、トランジスタや配線などの寄生容量、及びトランジスタのしきい値電圧などの影響は考慮しない。
期間T1では、配線G1と配線G2の両方に、トランジスタをオン状態にする電位を与える。また、配線S1には固定電位である電位Vrefを供給し、配線S2には第1データ電位Vwを供給する。
続いて期間T2では、配線G1にはトランジスタM1をオン状態とする電位を与え、配線G2にはトランジスタM2をオフ状態とする電位を与える。また、配線S1には第2データ電位Vdateを供給する。配線S2には所定の定電位を与える、またはフローティングとしてもよい。
本実施の形態では、本発明の一態様の情報処理装置の構成について、図34および図35を参照しながら説明する。
本実施の形態で説明する情報処理装置5200Bは、演算装置5210と、入出力装置5220と、を有する(図34A参照)。
例えば、円筒状の柱などに沿った外形を表示部5230に適用することができる(図34B参照)。情報処理装置5200Bは、使用環境の照度に応じて、表示方法を変更する機能を備える。また、情報処理装置5200Bは、人の存在を検知して、表示内容を変更する機能を備える。これにより、情報処理装置5200Bは、例えば、建物の柱に設置することができる。または、広告または案内等を表示することができる。または、情報処理装置5200Bは、デジタルサイネージ等に用いることができる。
情報処理装置5200Bは、例えば、使用者が使用するポインタの軌跡に基づいて画像情報を生成する機能を備える(図34C参照)。具体的には、対角線の長さが20インチ以上、好ましくは40インチ以上、より好ましくは55インチ以上の表示パネルを用いることができる。または、複数の表示パネルを並べて1つの表示領域に用いることができる。または、複数の表示パネルを並べてマルチスクリーンに用いることができる。これにより、情報処理装置5200Bは、例えば、電子黒板、電子掲示板、電子看板等に用いることができる。
情報処理装置5200Bは、例えば、使用環境の照度に応じて、表示方法を変更する機能を備える(図34D参照)。これにより、例えば、スマートウオッチ(登録商標)の消費電力を低減することができる。または、例えば、晴天の屋外等の外光の強い環境においても好適に使用できるように、画像をスマートウオッチ(登録商標)に表示することができる。
情報処理装置5200Bは、表示部5230などを有する。表示部5230は、例えば、筐体の側面に沿って緩やかに曲がる曲面を備える(図34E参照)。または、表示部5230は表示パネルを備え、表示パネルは、例えば、前面、側面および上面に表示する機能を備える。これにより、例えば、携帯電話の前面だけでなく、側面および上面に画像情報を表示することができる。
情報処理装置5200Bは、例えば、使用環境の照度に応じて、表示方法を変更する機能を備える(図35A参照)。これにより、スマートフォンの消費電力を低減することができる。または、例えば、晴天の屋外等の外光の強い環境においても好適に使用できるように、画像をスマートフォンに表示することができる。
情報処理装置5200Bは、例えば、使用環境の照度に応じて、表示方法を変更する機能を備える(図35B参照)。これにより、晴天の日に屋内に差し込む強い外光が当たっても好適に使用できるように、映像をテレビジョンシステムに表示することができる。
情報処理装置5200Bは、例えば、使用環境の照度に応じて、表示方法を変更する機能を備える(図35C参照)。これにより、例えば、晴天の屋外等の外光の強い環境においても好適に使用できるように、画像をタブレットコンピュータに表示することができる。
情報処理装置5200Bは、例えば、使用環境の照度に応じて、表示方法を変更する機能を備える(図35D参照)。これにより、例えば、晴天の屋外等の外光の強い環境においても好適に閲覧できるように、被写体をデジタルカメラに表示することができる。
情報処理装置5200Bは、例えば、使用環境の照度に応じて、表示方法を変更する機能を備える(図35E参照)。これにより、例えば、晴天の屋外等の外光の強い環境においても好適に使用できるように、画像をパーソナルコンピュータに表示することができる。
Claims (7)
- 基板上に、複数のトランジスタをマトリクス状に形成し、
前記基板上に、前記トランジスタと電気的に接続する導電体を形成し、
フィルム上に、複数の発光素子をマトリクス状に形成し、
前記発光素子はそれぞれ、一方の面に電極を有し、他方の面が前記フィルムと接し、
前記導電体と、前記電極とを対向させ、
押出機構を、前記フィルム側から前記基板側に押し出して前記導電体と前記電極を接触させ、前記導電体と前記電極を電気的に接続させる表示装置の作製方法。 - 請求項1において、
前記導電体と前記電極を接触させた後に、前記押出機構を介して前記導電体及び前記電極に超音波を印加し、前記導電体と前記電極を圧着する表示装置の作製方法。 - 請求項1または請求項2において、
前記フィルムは、引張弾性率が3GPa以上18GPa以下である表示装置の作製方法。 - 請求項1乃至請求項3のいずれか一において、
前記複数の発光素子が形成されたフィルムを、複数用いる表示装置の作製方法。 - 請求項1乃至請求項4のいずれか一において、
前記複数の発光素子の少なくとも一つは、マイクロLEDである表示装置の作製方法。 - 請求項1乃至請求項5のいずれか一において、
前記複数のトランジスタの少なくとも一つは、チャネル形成領域に金属酸化物を有する表示装置の作製方法。 - ステージと、把持機構と、押出機構と、を有し、
前記ステージは、複数のトランジスタがマトリクス状に形成された基板を保持する機能を有し、
前記基板上には、前記トランジスタと電気的に接続する導電体が形成され、
前記把持機構は、複数の発光素子がマトリクス状に形成されたフィルムを把持する機能を有し、
前記発光素子はそれぞれ、一方の面に電極を有し、他方の面が前記フィルムと接し、
前記把持機構は、前記導電体と、前記電極とを対向させる機能を有し、
前記押出機構は、前記フィルム側から前記基板側に押し出して前記導電体と前記電極を接触させ、前記導電体と前記電極を電気的に接続させる機能を有する表示装置の作製装置。
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US11710760B2 (en) | 2019-06-21 | 2023-07-25 | Semiconductor Energy Laboratory Co., Ltd. | Display device, display module, electronic device, and manufacturing method of display device |
CN111540273B (zh) * | 2020-05-26 | 2021-08-06 | Tcl华星光电技术有限公司 | Mini LED背光结构和Mini LED背光模组 |
CN111710691B (zh) * | 2020-06-05 | 2023-01-24 | 深圳市华星光电半导体显示技术有限公司 | 柔性Micro-LED显示面板及其制作方法 |
EP4309169A1 (en) * | 2021-03-16 | 2024-01-24 | Google LLC | Method for display manufacturing using groups of micro-leds and micro-led arrays |
US20240257671A1 (en) | 2021-05-13 | 2024-08-01 | Semiconductor Energy Laboratory Co., Ltd. | Electronic device |
EP4102307A1 (fr) * | 2021-06-08 | 2022-12-14 | The Swatch Group Research and Development Ltd | Pièce d'horlogerie à illumination localisée |
US20240079386A1 (en) * | 2021-10-26 | 2024-03-07 | Lg Electronics Inc. | Display device using semiconductor light-emitting element |
JP2023097466A (ja) * | 2021-12-28 | 2023-07-10 | 株式会社東海理化電機製作所 | 表示装置製造用治具、表示装置の製造方法、表示装置製造用治具を用いて製造された表示装置、及び表示装置の製造方法を用いて製造された表示装置 |
CN114664968B (zh) * | 2022-03-15 | 2023-11-14 | 中国科学院长春光学精密机械与物理研究所 | 一种可见-红外双波段光电探测器 |
WO2024075078A1 (en) * | 2022-10-06 | 2024-04-11 | Vuereal Inc. | Phosphor protection in microled displays |
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US20220045039A1 (en) | 2022-02-10 |
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