JP2009282262A - 液晶表示装置およびその製造方法 - Google Patents
液晶表示装置およびその製造方法 Download PDFInfo
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Abstract
【解決手段】一対の基板と、前記一対の基板に挟まれた液晶層とを有し、
前記一対の基板の一方の対向面に第1配向膜を備え、
前記一対の基板の他方の対向面に第2配向膜を備え、
前記第1配向膜には、下層の第1構成物により前記液晶層に突出している第1凸部を備え、
前記第2配向膜には、前記第1凸部と対向し、下層の第2構成物により前記液晶層に突出している第2凸部を備え、
前記第1凸部が前記第2凸部よりも低く、凸部上面の面積が小さい液晶表示装置であって、
前記第1配向膜は、光分解型の配向膜材料で構成されており、
前記第1配向膜の前記第1凸部上の膜厚d1と、前記第2配向膜の第2凸部上の膜厚d2は、式1および式2を満たす。
0nm<d1<30nm …… 式1
d2<d1 …… 式2
【選択図】図1
Description
このように、スペーサ台座上に設けた薄い配向膜は、はがれたり、削れたりしにくい。これは、配向膜中に下地基板との密着性を向上させるため添加されているカップリング剤によるものと考えられる。つまり、配向膜/下地層の界面では,カップリング剤により下地と化学的に結合し、下地近くの配向膜は密着性が高く,下地から離れるにつれて,カップリング剤の影響が小さくなっていき密着性が低下していると考えられる。このため,配向膜を薄く形成すればするほど,配向膜の密着性はカップリング剤の影響をより大きく受けるようになり密着性が高まり,柱状スペーサ接触部の配向膜のこすれ耐性が高くなっていると考えられる。
前記一対の基板の一方の対向面に第1配向膜を備え、
前記一対の基板の他方の対向面に第2配向膜を備え、
前記第1配向膜には、下層の第1構成物により前記液晶層に突出している第1凸部を備え、
前記第2配向膜には、下層の第2構成物により前記液晶層に突出し、前記第1凸部と対向している第2凸部を備え、
前記第1凸部が前記第2凸部よりも低く、第1凸部上面の面積が第2凸部上面の面積よりも小さい液晶表示装置の製造方法であって、
前記第1配向膜として、粘度35mPa・s以下の光分解型のポリアミド酸を含む揮発性有機溶剤を焼成して光分解型のポリアミド膜を形成する第1ステップと、
前記ポリイミド膜に紫外光を含む偏光光を照射しながら、焼成する第2ステップとを有することを特徴とする。
前記ポリイミド膜に紫外光を含む偏光光を照射しながら、焼成する第4ステップとを有することを特徴とする。
前記第1構成物は、前記薄膜トランジスタを構成する、半導体層、ゲート酸化膜、ゲート電極、層間絶縁膜、ソース電極、ドレイン電極の少なくともいずれかを含んでいることを特徴とする。
前記一方の基板は、対向電極を備えていることを特徴とする。
前記一対の基板の一方の対向面に第1配向膜を備え、
前記一対の基板の他方の対向面に第2配向膜を備え、
前記第1配向膜には、下層の第1構成物により前記液晶層に突出している第1凸部を備え、
前記第2配向膜には、前記第1凸部と対向し、下層の第2構成物により前記液晶層に突出している第2凸部を備え、
前記第1凸部が前記第2凸部よりも低く、凸部上面の面積が小さい液晶表示装置であって、
前記第1配向膜は、光分解型の配向膜材料で構成されており、
前記第1配向膜の前記第1凸部上の膜厚d1と、前記第2配向膜の第2凸部上の膜厚d2は、式1および式2を満たすことを特徴とする。
d2<d1 …… 式2
(7)本発明の液晶表示装置は、たとえば、(6)の構成において、前記第2の配向膜は、光分解型の配向膜材料で構成されていることを特徴とする。
前記第1構成物は、前記薄膜トランジスタを構成する、半導体層、ゲート酸化膜、ゲート電極、層間絶縁膜、ソース電極、ドレイン電極の少なくともいずれかを含んでいることを特徴とする。
前記一方の基板は、対向電極を備えていることを特徴とする。
(構成)
図1は、本発明の液晶表示装置(パネル)の断面を示し、柱状スペーサとスペーサ台座が形成されている個所およびその周辺を示した図となっている。図1は、実施例1〜4に相当する液晶表示装置の構成を示している。
次に、前記配向膜ORI1、および配向膜ORI2のそれぞれの製造方法の一実施例を示す。以下の説明にあっては配向膜ORI1の製造方法について示すが、配向膜ORI2の場合にあっても同様である。
(構成)
図4は、実施例5〜8に相当する液晶表示装置の構成を示し、図1に対応した図となっている。
前記配向膜ORI1、および配向膜ORI2のそれぞれの製造方法は、実施態様1に示したとほぼ同様である。
(構成)
図7は、実施例9〜11に相当する液晶表示装置の構成を示し、図1に対応した図となっている。
前記配向膜ORI1、および配向膜ORI2のそれぞれの製造方法は、実施態様1に示したとほぼ同様である。
図9は、柱状スペーサPSと対向する箇所にスペーサ台座(または前記薄膜トランジスタTFTのようにスペーサ台座に替わるもの)を設けていない構成を示す図で、上記各実施例の効果を量的に把握しやすいようにするための比較例である。
上述した各実施態様において示した実施例1〜4、比較例1〜3、実施例5〜8、比較例4〜6、実施例9〜11、比較例7〜10について、図11に、それぞれ、輝点発生耐圧レベルを検査した結果を表に示している。
Claims (10)
- 一対の基板と、前記一対の基板に挟まれた液晶層とを有し、
前記一対の基板の一方の対向面に第1配向膜を備え、
前記一対の基板の他方の対向面に第2配向膜を備え、
前記第1配向膜には、下層の第1構成物により前記液晶層に突出している第1凸部を備え、
前記第2配向膜には、下層の第2構成物により前記液晶層に突出し、前記第1凸部と対向している第2凸部を備え、
前記第1凸部が前記第2凸部よりも低く、第1凸部上面の面積が第2凸部上面の面積よりも小さい液晶表示装置の製造方法であって、
前記第1配向膜として、粘度35mPa・s以下の光分解型のポリアミド酸を含む揮発性有機溶剤を焼成して光分解型のポリアミド膜を形成する第1ステップと、
前記ポリイミド膜に紫外光を含む偏光光を照射しながら、焼成する第2ステップとを有することを特徴とする液晶表示装置の製造方法。 - 請求項1において、
前記第2の配向膜は、粘度35mPa・s以下の光分解型のポリアミド酸を含む揮発性有機溶剤を焼成して光分解型のポリイミド膜を形成する第3ステップと、
前記ポリイミド膜に紫外光を含む偏光光を照射しながら、焼成する第4ステップとを有することを特徴とする液晶表示装置の製造方法。 - 請求項1において、
前記一対の基板の一方は、前記第1配向膜との間に、薄膜トランジスタを備え、
前記第1構成物は、前記薄膜トランジスタを構成する、半導体層、ゲート酸化膜、ゲート電極、層間絶縁膜、ソース電極、ドレイン電極の少なくともいずれかを含んでいることを特徴とする液晶表示装置の製造方法。 - 請求項3において、
前記ソース電極及びドレイン電極の一方に接続された画素電極を備え、
前記一方の基板は、対向電極を備えていることを特徴とする液晶表示装置の製造方法。 - 請求項1において、
前記第1凸部は、錐台であることを特徴とする液晶表示装置の製造方法。 - 一対の基板と、前記一対の基板に挟まれた液晶層とを有し、
前記一対の基板の一方の対向面に第1配向膜を備え、
前記一対の基板の他方の対向面に第2配向膜を備え、
前記第1配向膜には、下層の第1構成物により前記液晶層に突出している第1凸部を備え、
前記第2配向膜には、前記第1凸部と対向し、下層の第2構成物により前記液晶層に突出している第2凸部を備え、
前記第1凸部が前記第2凸部よりも低く、凸部上面の面積が小さい液晶表示装置であって、
前記第1配向膜は、光分解型の配向膜材料で構成されており、
前記第1配向膜の前記第1凸部上の膜厚d1と、前記第2配向膜の第2凸部上の膜厚d2は、式1および式2を満たすことを特徴とする液晶表示装置。
0nm<d1<30nm …… 式1
d2<d1 …… 式2 - 請求項6において、
前記第2の配向膜は、光分解型の配向膜材料で構成されていることを特徴とする液晶表示装置。 - 請求項6において、
前記一対の基板の一方は、前記第1配向膜との間に、薄膜トランジスタを備え、
前記第1構成物は、前記薄膜トランジスタを構成する、半導体層、ゲート酸化膜、ゲート電極、層間絶縁膜、ソース電極、ドレイン電極の少なくともいずれかを含んでいることを特徴とする液晶表示装置。 - 請求項8において、
前記ソース電極及びドレイン電極の一方に接続された画素電極を備え、
前記一方の基板は、対向電極を備えていることを特徴とする液晶表示装置。 - 請求項6において、
前記第1凸部は、錐台であることを特徴とする液晶表示装置。
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US8493529B2 (en) | 2010-06-18 | 2013-07-23 | Japan Display Central Inc. | Liquid crystal display device |
CN102654691B (zh) * | 2011-03-03 | 2014-10-22 | 株式会社日立显示器 | 液晶显示装置及其制造方法 |
JP2012185232A (ja) * | 2011-03-03 | 2012-09-27 | Japan Display East Co Ltd | 液晶表示装置およびその製造方法 |
CN102654691A (zh) * | 2011-03-03 | 2012-09-05 | 株式会社日立显示器 | 液晶显示装置及其制造方法 |
JP2012226250A (ja) * | 2011-04-22 | 2012-11-15 | Japan Display East Co Ltd | 液晶表示装置 |
US9182634B2 (en) | 2011-06-09 | 2015-11-10 | Japan Display Inc. | Liquid crystal display device wherein an alignment film over a concave portion has a thickness which is thicker than a thickness of the alignment film over convex portions |
US8736804B2 (en) | 2011-06-09 | 2014-05-27 | Japan Display Inc. | Liquid crystal display device comprising a concavo-convex pedestal formed with a convex portion and a concave portion at a bottom of the concavo-convex pedestal |
US8885136B2 (en) | 2011-06-09 | 2014-11-11 | Japan Display Inc. | Display device comprising a recessed portion that is formed with at least one convex portion at a bottom of the recessed portion and wherein the recessed portion faces a columnar spacer |
JP2013127563A (ja) * | 2011-12-19 | 2013-06-27 | Japan Display East Co Ltd | 液晶表示装置 |
US9746718B2 (en) | 2011-12-19 | 2017-08-29 | Japan Display Inc. | Liquid crystal display device |
US9250479B2 (en) | 2011-12-19 | 2016-02-02 | Japan Display Inc. | Liquid crystal display device |
US10473986B2 (en) | 2011-12-19 | 2019-11-12 | Japan Display Inc. | Liquid crystal display device |
US10185184B2 (en) | 2011-12-19 | 2019-01-22 | Japan Display Inc. | Liquid crystal display device |
US8982311B2 (en) | 2011-12-22 | 2015-03-17 | Japan Display East Inc. | Liquid crystal display device |
US9389463B2 (en) | 2013-09-13 | 2016-07-12 | Samsung Display Co., Ltd. | Liquid crystal display including spacer in insulating layer opening |
US9389467B2 (en) | 2013-10-07 | 2016-07-12 | Samsung Display Co., Ltd. | Liquid crystal display |
US9897858B2 (en) | 2014-04-21 | 2018-02-20 | Samsung Display Co., Ltd | Display apparatus |
US9625769B2 (en) | 2015-04-30 | 2017-04-18 | Samsung Display Co., Ltd. | Liquid crystal display including protruding auxiliary wires corresponding to spacer |
US10101614B2 (en) | 2015-12-04 | 2018-10-16 | Japan Display Inc. | Liquid crystal display device |
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