JP5618464B2 - 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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- JP5618464B2 JP5618464B2 JP2008133840A JP2008133840A JP5618464B2 JP 5618464 B2 JP5618464 B2 JP 5618464B2 JP 2008133840 A JP2008133840 A JP 2008133840A JP 2008133840 A JP2008133840 A JP 2008133840A JP 5618464 B2 JP5618464 B2 JP 5618464B2
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- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
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- G02F1/13378—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers by treatment of the surface, e.g. embossing, rubbing or light irradiation
- G02F1/133788—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers by treatment of the surface, e.g. embossing, rubbing or light irradiation by light irradiation, e.g. linearly polarised light photo-polymerisation
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- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
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- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
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- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
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- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
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- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
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- G02F1/136286—Wiring, e.g. gate line, drain line
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- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
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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、
前記一方の対向面は、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、
前記他方の対向面は、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前記一方の対向面の前記第1凸部とそれ以外の部分とに形成した後に、レベリングして前記第1凸部上の前記揮発性有機溶剤を薄膜化し、前記第1凸部上の前記揮発性有機溶剤の膜厚を前記第1凸部の周囲の膜厚の略1/4以下とした後に、前記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。
(6)本発明の液晶表示装置の製造方法は、たとえば、(1)乃至(5)のいずれかの構成において、前記揮発性有機溶剤は、前記一方の対向面に印刷によって形成され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、
前記一方の対向面は、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、
前記他方の対向面は、前記第1凸部と対向し、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を満たすと共に、
前記第1配向膜は、前記第1凸部の周囲の膜厚が100nm以上であり、
前記第2配向膜は、前記第2凸部の周囲の膜厚が100nm以上であることを特徴とする。
0nm<d1<30nm …… 式1
d2<d1 …… 式2
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 (11)
- 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、
前記一方の対向面は、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、
前記他方の対向面は、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前記一方の対向面の前記第1凸部とそれ以外の部分とに形成した後に、レベリングして前記第1凸部上の前記揮発性有機溶剤を薄膜化し、前記第1凸部上の前記揮発性有機溶剤の膜厚を前記第1凸部の周囲の膜厚の略1/4以下とした後に、前記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前記他方の対向面の前記第2凸部とそれ以外の部分とに形成した後に、レベリングして前記第2凸部上の前記揮発性有機溶剤を薄膜化し、前記揮発性有機溶剤の薄膜化した後に、前記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。 - 請求項1乃至5のいずれかにおいて、
前記揮発性有機溶剤は、前記一方の対向面に印刷によって形成され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、
前記一方の対向面は、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、
前記他方の対向面は、前記第1凸部と対向し、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を満たすと共に、
前記第1配向膜は、前記第1凸部の周囲の膜厚が100nm以上であり、
前記第2配向膜は、前記第2凸部の周囲の膜厚が100nm以上である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7において、
前記第2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7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9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7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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| JP2005156752A (ja) * | 2003-11-21 | 2005-06-16 | Sony Corp | 液晶表示素子および投射型表示装置 |
| JP2005201960A (ja) * | 2004-01-13 | 2005-07-28 | Seiko Epson Corp | 液晶装置および投射型表示装置 |
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| JP4653421B2 (ja) * | 2004-06-08 | 2011-03-16 | 株式会社 日立ディスプレイズ | 液晶表示装置 |
| JP2006227459A (ja) * | 2005-02-21 | 2006-08-31 | Hitachi Displays Ltd | 液晶表示装置 |
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| JP4768393B2 (ja) * | 2005-10-21 | 2011-09-07 | Nec液晶テクノロジー株式会社 | 液晶表示装置およびその製造方法 |
| US20080049176A1 (en) * | 2006-08-25 | 2008-02-28 | Samsung Electronics Co., Ltd. | Thin film transistor-array substrate, transflective liquid crystal display device with the same, and method for manufacturing the same |
| JP2008070584A (ja) * | 2006-09-14 | 2008-03-27 | Hitachi Displays Ltd | 液晶表示装置 |
| JP5618464B2 (ja) * | 2008-05-22 | 2014-11-05 | 株式会社ジャパンディスプレイ | 液晶表示装置およびその製造方法 |
| KR20140046818A (ko) * | 2012-10-11 | 2014-04-21 | 삼성디스플레이 주식회사 | 표시 패널 및 이를 포함하는 표시 장치 |
| KR20150030526A (ko) * | 2013-09-12 | 2015-03-20 | 삼성디스플레이 주식회사 | 액정 표시 장치 |
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