JP2002250943A5 - - Google Patents

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JP2002250943A5
JP2002250943A5 JP2001047535A JP2001047535A JP2002250943A5 JP 2002250943 A5 JP2002250943 A5 JP 2002250943A5 JP 2001047535 A JP2001047535 A JP 2001047535A JP 2001047535 A JP2001047535 A JP 2001047535A JP 2002250943 A5 JP2002250943 A5 JP 2002250943A5
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Japan
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liquid crystal
voltage
state
polarity
phase
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JP2001047535A
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JP2002250943A (en
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【0013】
【課題を解決するための手段】
本発明は、カイラルスメクチック液晶と、該液晶に電圧を印加するための電極と、該液晶を挟持して対向すると共に、少なくとも一方の対向面に該液晶を配向させるための一軸配向処理が施された一対の基板と、を少なくとも備えた液晶素子であって、上記液晶の、液晶分子軸方向に直交する方向の誘電率ε(⊥)が、カイラルスメクチック相において4.0を超え、電圧無印加時には、液晶の平均分子軸が単安定化された第一の状態を示し、第一の極性の電圧印加時には、該液晶の平均分子軸が印加電圧の大きさに応じた角度で上記第一の状態の位置から一方の側にチルトし、該第一の極性とは逆極性の第二の極性の電圧印加時には、液晶の平均分子軸が印加電圧の大きさに応じた角度で上記第一の状態の位置から第一の極性の電圧印加時とは逆側にチルトし、上記第一の極性の電圧印加時と第二の極性の電圧印加時の液晶の平均分子軸の第一の状態の位置を基準とした最大チルト状態のチルト角をそれぞれβ1、β2とすると、β1>β2となることを特徴とする液晶素子である。
[0013]
[Means for Solving the Problems]
In the present invention, a chiral smectic liquid crystal, an electrode for applying a voltage to the liquid crystal, and a liquid crystal are sandwiched and opposed, and uniaxial alignment processing is performed on at least one of opposing surfaces to align the liquid crystal. A liquid crystal element having at least a pair of substrates, wherein the dielectric constant .di-elect cons. (.Zeta.) Of the liquid crystal in the direction orthogonal to the liquid crystal molecular axis direction exceeds 4.0 in the chiral smectic phase and no voltage is applied Sometimes, the average molecular axis of the liquid crystal exhibits a monostabilized first state, and when the voltage of the first polarity is applied, the average molecular axis of the liquid crystal is at an angle corresponding to the magnitude of the applied voltage. At the time of applying a voltage of a second polarity opposite to the first polarity, the average molecular axis of the liquid crystal is inclined at an angle corresponding to the magnitude of the applied voltage when tilted from the position of the state to one side. When applying a voltage of the first polarity from the position of the state Tilts to the opposite side, and the tilt angle of the maximum tilt state with respect to the position of the first state of the average molecular axis of the liquid crystal when applying the voltage of the first polarity and the voltage of the second polarity In the case of β 1 and β 2 , the liquid crystal element is characterized in that β 1 > β 2 .

【0014】
上記本発明においては、上記β1、β2がβ1≧5×β2であること、上記液晶の相転移系列が、降温時に、等方性液体相−コレステリック相−カイラルスメクチックC相または等方性液体相−カイラルスメクチックC相であって、該液晶のスメクチック層の法線方向が実質的に一方向であること、上記液晶のバルク状態でのらせんピッチがセル厚の2倍より長いこと、複数の画素を有し、画素毎に画素電極とアクティブ素子を備え、該アクティブ素子を介して各画素の液晶をアクティブマトリクス駆動し、アナログ階調表示を行うこと、を好ましい態様として含むものである。
[0014]
In the above-described present invention, the beta 1, that beta 2 is β 1 ≧ 5 × β 2, a phase transition series of the upper Symbol liquid crystal, while cooled, isotropic liquid phase - cholesteric phase - chiral smectic C phase or Isotropic liquid phase-chiral smectic C phase, wherein the normal direction of the smectic layer of the liquid crystal is substantially one direction, and the helical pitch in the bulk state of the liquid crystal is longer than twice the cell thickness A preferred embodiment includes a plurality of pixels, a pixel electrode and an active element for each pixel, and active matrix driving of liquid crystal of each pixel through the active element to perform analog gray scale display. .

【0016】
即ち、本発明の液晶素子は、カイラルスメクチック液晶と、該液晶に電圧を印加するための電極と、該液晶を挟持して対向すると共に、少なくとも一方の対向面に該液晶を配向させるための一軸配向処理が施された一対の基板と、を少なくとも備えた液晶素子であって、上記液晶の、液晶分子長軸方向に直交する方向の誘電率ε(⊥)が、カイラルスメクチック相において4.0を超え、電圧無印加時には、液晶の平均分子軸が単安定化された第一の状態を示し、第一の極性の電圧印加時には、該液晶の平均分子軸が印加電圧の大きさに応じた角度で上記第一の状態の位置から一方の側にチルトし、該第一の極性とは逆極性の第二の極性の電圧印加時には、液晶の平均分子軸が印加電圧の大きさに応じた角度で上記第一の状態の位置から第一の極性の電圧印加時とは逆側にチルトし、上記第一の極性の電圧印加時と第二の極性の電圧印加時の液晶の平均分子軸の第一の状態の位置を基準とした最大チルト状態のチルト角をそれぞれβ1、β2とすると、β1>β2となることを特徴とする。
[0016]
That is, in the liquid crystal element of the present invention, a chiral smectic liquid crystal, an electrode for applying a voltage to the liquid crystal, and a uniaxial for aligning the liquid crystal on at least one opposing surface while sandwiching and facing the liquid crystal. a pair of substrates alignment treatment is applied, the a liquid crystal device having at least, of the liquid crystal, the dielectric constant in the direction perpendicular to the liquid crystal molecular long axis direction epsilon (⊥) is, in mosquito Ira Le smectic phase 4. When the voltage exceeds 0 and no voltage is applied, the average molecular axis of the liquid crystal exhibits a monostabilized first state, and when a voltage of the first polarity is applied, the average molecular axis of the liquid crystal corresponds to the magnitude of the applied voltage. Tilts from the position of the first state to one side at a second angle, and when applying a voltage of a second polarity opposite to the first polarity, the average molecular axis of the liquid crystal corresponds to the magnitude of the applied voltage From the position of the above first state at different angles Tilted to the opposite side to the time of application of voltage of polarity, and maximum tilt based on the position of the first state of the average molecular axis of the liquid crystal at the time of application of voltage of the first polarity and the voltage of second polarity If the tilt angles of the state are respectively β 1 and β 2 , then β 1 > β 2 .

Claims (5)

カイラルスメクチック液晶と、該液晶に電圧を印加するための電極と、該液晶を挟持して対向すると共に、少なくとも一方の対向面に該液晶を配向させるための一軸配向処理が施された一対の基板と、を少なくとも備えた液晶素子であって、上記液晶の、液晶分子軸方向に直交する方向の誘電率ε(⊥)が、カイラルスメクチック相において4.0を超え、電圧無印加時には、液晶の平均分子軸が単安定化された第一の状態を示し、第一の極性の電圧印加時には、該液晶の平均分子軸が印加電圧の大きさに応じた角度で上記第一の状態の位置から一方の側にチルトし、該第一の極性とは逆極性の第二の極性の電圧印加時には、液晶の平均分子軸が印加電圧の大きさに応じた角度で上記第一の状態の位置から第一の極性の電圧印加時とは逆側にチルトし、上記第一の極性の電圧印加時と第二の極性の電圧印加時の液晶の平均分子軸の第一の状態の位置を基準とした最大チルト状態のチルト角をそれぞれβ1、β2とすると、β1>β2となることを特徴とする液晶素子。A chiral smectic liquid crystal, an electrode for applying a voltage to the liquid crystal, and a pair of substrates which are opposed to sandwich the liquid crystal while being uniaxially oriented for orienting the liquid crystal on at least one opposing surface. And the dielectric constant ε (⊥) of the liquid crystal in the direction orthogonal to the liquid crystal molecular axis direction exceeds 4.0 in the chiral smectic phase, and when no voltage is applied, the liquid crystal The average molecular axis shows a monostabilized first state, and when a voltage of a first polarity is applied, the average molecular axis of the liquid crystal is at an angle corresponding to the magnitude of the applied voltage from the position of the first state At the time of applying a voltage of a second polarity opposite to the first polarity by tilting to one side, the average molecular axis of the liquid crystal is at an angle corresponding to the magnitude of the applied voltage from the position of the first state On the opposite side to the voltage application of the first polarity Suppose, the first polarity voltage application state and a second polarity maximum tilt, respectively beta 1 a tilt angle of the state where the position relative to the first state of the average molecular axis of the liquid crystal when a voltage is applied in, beta In the case of 2 , it is β 1 > β 2 . 上記β1、β2がβ1≧5×β2である請求項1記載の液晶素子。The liquid crystal device according to claim 1 , wherein the β 1 and β 2 satisfy β 1 55 × β 2 . 上記液晶の相転移系列が、降温時に、等方性液体相−コレステリック相−カイラルスメクチックC相または等方性液体相−カイラルスメクチックC相であって、該液晶のスメクチック層の法線方向が実質的に一方向である請求項1または2に記載の液晶素子。The phase transition series of the liquid crystal is an isotropic liquid phase-cholesteric phase-chiral smectic C phase or an isotropic liquid phase-chiral smectic C phase when the temperature is lowered, and the normal direction of the smectic layer of the liquid crystal is substantially The liquid crystal element according to claim 1 or 2 , which is unidirectional. 上記液晶のバルク状態でのらせんピッチがセル厚の2倍より長い請求項1〜のいずれかに記載の液晶素子。The liquid crystal element according to any one of claims 1 to 3 , wherein the helical pitch in the bulk state of the liquid crystal is longer than twice the cell thickness. 複数の画素を有し、画素毎に画素電極とアクティブ素子を備え、該アクティブ素子を介して各画素の液晶をアクティブマトリクス駆動し、アナログ階調表示を行う請求項1〜のいずれかに記載の液晶素子。5. The display device according to any one of claims 1 to 4 , wherein a plurality of pixels are provided, a pixel electrode and an active element are provided for each pixel, and liquid crystal of each pixel is active matrix driven via the active element to perform analog gray scale display. Liquid crystal elements.
JP2001047535A 2001-02-23 2001-02-23 Liquid crystal element Withdrawn JP2002250943A (en)

Priority Applications (1)

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JP2001047535A JP2002250943A (en) 2001-02-23 2001-02-23 Liquid crystal element

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2001047535A JP2002250943A (en) 2001-02-23 2001-02-23 Liquid crystal element

Publications (2)

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JP2002250943A JP2002250943A (en) 2002-09-06
JP2002250943A5 true JP2002250943A5 (en) 2004-11-18

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