JP2005234254A5 - - Google Patents

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JP2005234254A5
JP2005234254A5 JP2004043953A JP2004043953A JP2005234254A5 JP 2005234254 A5 JP2005234254 A5 JP 2005234254A5 JP 2004043953 A JP2004043953 A JP 2004043953A JP 2004043953 A JP2004043953 A JP 2004043953A JP 2005234254 A5 JP2005234254 A5 JP 2005234254A5
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liquid crystal
display device
vertical alignment
crystal display
substrate
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JP4614200B2 (en
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Claims (20)

対向配置された第１および第２の基板と、
前記第１および第２の基板の対向表面上に形成され、プレティルト付与用のラビング処理が行われ、表面自由エネルギが３５ｍＮ／ｍ〜３９ｍＮ／ｍである第１および第２の垂直配向膜と、
前記第１および第２の基板間に挟持されたプレティルト角を有する垂直配向モードの液晶層と、
を有する液晶表示装置。 First and second substrates disposed opposite to each other;
Formed on the opposing surfaces of the first and second substrates, a rubbing treatment for the pre-tilt imparted is performed, the first and second vertical surface free energy is 35 m N / m~39 m N / m An alignment film;
A vertically aligned mode liquid crystal layer having a pretilt angle sandwiched between the first and second substrates;
A liquid crystal display device. 表示状態において、ラビング筋も配向欠陥も有さない請求項１記載の液晶表示装置。   The liquid crystal display device according to claim 1, wherein the display device has no rubbing streak or alignment defect. 前記第１および第２の垂直配向膜が、ポリイミドまたはポリアミック酸を主鎖骨格に有する有機高分子材料で形成されている請求項１または２記載の液晶表示装置。   3. The liquid crystal display device according to claim 1, wherein the first and second vertical alignment films are formed of an organic polymer material having polyimide or polyamic acid as a main chain skeleton. 前記液晶層は前記第１および第２の垂直配向膜表面で８８．４度以上、８９．７度未満のプレティルト角を有する請求項１〜３のいずれか１項記載の液晶表示装置。   4. The liquid crystal display device according to claim 1, wherein the liquid crystal layer has a pretilt angle of 88.4 degrees or more and less than 89.7 degrees on the surfaces of the first and second vertical alignment films. 前記液晶層は前記第１および第２の垂直配向膜表面で８８．５度〜８９．５度のプレティルト角を有する請求項４記載の液晶表示装置。   The liquid crystal display device according to claim 4, wherein the liquid crystal layer has a pretilt angle of 88.5 degrees to 89.5 degrees on the surfaces of the first and second vertical alignment films. 前記第１の垂直配向膜のラビングと前記第２の垂直配向膜のラビングがアンチパラレル配向である請求項１〜５のいずれか１項記載の液晶表示装置。   The liquid crystal display device according to claim 1, wherein the rubbing of the first vertical alignment film and the rubbing of the second vertical alignment film are anti-parallel alignment. 前記液晶層は素子を液晶の等方相温度以上に昇温後、冷却して液晶相にもどした時液晶配向に欠陥が生じない請求項１〜６のいずれか１項記載の液晶表示素子。   The liquid crystal display element according to any one of claims 1 to 6, wherein the liquid crystal layer has no defect in liquid crystal alignment when the element is heated to an isotropic phase temperature of liquid crystal or higher and then cooled to return to the liquid crystal phase. 対向配置された第１および第２の基板と、
前記第１の基板の対向表面上に形成され、プレティルト付与用のラビング処理が行われ、表面自由エネルギが３５ｍＮ／ｍ〜３９ｍＮ／ｍである第１の垂直配向膜と、
前記第２の基板の対向表面上に形成され、ラビング処理されていない、表面自由エネルギが３５ｍＮ／ｍ〜３９ｍＮ／ｍである第２の垂直配向膜と、
前記第１および第２の基板間に挟持された垂直配向モードの液晶層と、
を有する液晶表示装置。 First and second substrates disposed opposite to each other;
Is formed on the opposite surface of said first substrate, a rubbing process for the pretilt imparted is performed, a first vertical alignment film surface free energy is 35 m N / m~39 m N / m,
Is formed on the opposite surface of the second substrate, not rubbing, and a second vertical alignment film surface free energy is 35 m N / m~39 m N / m,
A vertical alignment mode liquid crystal layer sandwiched between the first and second substrates;
A liquid crystal display device. 前記液晶層は前記第１の垂直配向膜表面で８７度〜８９度のプレティルト角を有する請求項８記載の液晶表示装置。   9. The liquid crystal display device according to claim 8, wherein the liquid crystal layer has a pretilt angle of 87 degrees to 89 degrees on the surface of the first vertical alignment film. 前記第１および第２の垂直配向膜が、ポリイミドまたはポリアミック酸を主鎖骨格に有する有機高分子材料で形成されている請求項８または９記載の液晶表示装置。   10. The liquid crystal display device according to claim 8, wherein the first and second vertical alignment films are formed of an organic polymer material having polyimide or polyamic acid in the main chain skeleton. （a）第１および第２の基板の表面上に表面自由エネルギが３５ｍＮ／ｍ〜３９ｍＮ／ｍの第１および第２の垂直配向膜を形成する工程と、
（ｂ）前記第１および第２の垂直配向膜にラビング処理を行う工程と、
（ｃ）前記第１の基板と前記第２の基板とを対向させ、その間に垂直配向液晶層を配置した液晶セルを形成する工程と、
を含む液晶表示装置の製造方法。 (A) a step of surface free energy on the surface of the first and second substrate to form first and second vertical alignment film of 35 m N / m~39 m N / m,
(B) performing a rubbing process on the first and second vertical alignment films;
(C) forming a liquid crystal cell in which the first substrate and the second substrate are opposed to each other and a vertical alignment liquid crystal layer is disposed between the first substrate and the second substrate;
A method for manufacturing a liquid crystal display device comprising: さらに、前記工程（ｃ）の後、
（ｄ）前記液晶セルに対して、液晶相−等方相の相転移温度以上の温度で熱処理を行う工程、
を含む請求項１１記載の液晶表示装置の製造方法。 Furthermore, after the step (c),
(D) performing a heat treatment on the liquid crystal cell at a temperature equal to or higher than a liquid crystal phase-isotropic phase transition temperature;
The manufacturing method of the liquid crystal display device of Claim 11 containing this. 前記工程（ｂ）は、綿またはレーヨンのラビング布を用いて行われる請求項１１記載の液晶表示装置の製造方法。   The method of manufacturing a liquid crystal display device according to claim 11, wherein the step (b) is performed using a rubbing cloth of cotton or rayon. 前記ラビング布は、綿の場合は２．８ｍｍ以上の毛足と５００００本／ｃｍ２以上のフィラメント密度を有し、レーヨンの場合は２００００本／ｃｍ２以上のフィラメント密度を有する請求項１３記載の液晶表示装置の製造方法。 14. The rubbing cloth has a hair density of 2.8 mm or more and a filament density of 50000 pieces / cm 2 or more in the case of cotton, and a filament density of 20000 pieces / cm 2 or more in the case of rayon. A method for manufacturing a liquid crystal display device. 前記工程（ｂ）および（ｄ）は、前記液晶層が前記第１および第２の垂直配向膜表面で８８．５度〜８９．５度のプレティルト角を有するように設定されている請求項１２〜１４のいずれか１項記載の液晶表示装置。   The steps (b) and (d) are set so that the liquid crystal layer has a pretilt angle of 88.5 degrees to 89.5 degrees on the surfaces of the first and second vertical alignment films. The liquid crystal display device of any one of -14. 前記工程（ｃ）において、前記第１の基板と前記第２の基板とが、ラビング方向に関して、アンチパラレルの方向で対向させられる請求項１１〜１５のいずれか１項記載の液晶表示装置の製造方法。   The liquid crystal display device manufacturing method according to claim 11, wherein in the step (c), the first substrate and the second substrate are opposed to each other in an antiparallel direction with respect to a rubbing direction. Method. （a）第１の基板の表面上に表面自由エネルギが３５ｍＮ／ｍ〜３９ｍＮ／ｍの第１の垂直配
向膜を形成する工程と、
（ｂ）前記第１の垂直配向膜にラビング処理を行う工程と、
（ｃ）第２の基板の表面上に表面自由エネルギが３５ｍＮ／ｍ〜３９ｍＮ／ｍの第２の垂直配向膜を形成する工程と、
（ｄ）前記第２の垂直配向膜はラビングしない状態で、前記第１の基板と前記第２の基板とを対向させ、その間に垂直配向液晶層を配置した液晶セルを形成する工程と、
を含む液晶表示装置の製造方法。 (A) a step of surface free energy on the surface of the first substrate to form a first vertical alignment film of 35 m N / m~39 m N / m,
(B) performing a rubbing process on the first vertical alignment film;
(C) a step of surface free energy on the surface of the second substrate to form a second vertical alignment film of 35 m N / m~39 m N / m,
(D) forming a liquid crystal cell in which the first substrate and the second substrate are opposed to each other without rubbing the second vertical alignment film, and a vertical alignment liquid crystal layer is disposed therebetween;
A method for manufacturing a liquid crystal display device comprising: さらに、前記工程（ｄ）の後、
（ｅ）前記液晶セルに対して、液晶相−等方相の相転移温度以上の温度で熱処理を行う工程、
を含む請求項１７記載の液晶表示装置の製造方法。 Furthermore, after the step (d),
(E) performing a heat treatment on the liquid crystal cell at a temperature equal to or higher than a liquid crystal phase-isotropic phase transition temperature;
A method for manufacturing a liquid crystal display device according to claim 17. 前記工程（ｂ）は、綿またはレーヨンのラビング布を用いて行われ、 ラビング布は、綿の場合は２．８ｍｍ以上の毛足と５００００本／ｃｍ２以上のフィラメント密度を有し、レーヨンの場合は２００００本／ｃｍ２以上のフィラメント密度を有する請求項１８記載の液晶表示装置の製造方法。 The step (b) is performed using a cotton or rayon rubbing cloth. In the case of cotton, the rubbing cloth has a hair foot of 2.8 mm or more and a filament density of 50000 pieces / cm 2 or more. The method for manufacturing a liquid crystal display device according to claim 18, wherein the case has a filament density of 20000 pieces / cm 2 or more. 前記工程（ｂ）および（ｅ）は、前記液晶層が前記第１の垂直配向膜表面で８７度〜８９度のプレティルト角を有するように設定されている請求項１８または１９記載の液晶表示装置。   20. The liquid crystal display device according to claim 18, wherein the steps (b) and (e) are set so that the liquid crystal layer has a pretilt angle of 87 degrees to 89 degrees on the surface of the first vertical alignment film. .
JP2004043953A 2004-02-20 2004-02-20 Normally black vertical alignment type liquid crystal display device and manufacturing method thereof Expired - Lifetime JP4614200B2 (en)

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