LIQUID CRYSTAL DISPLAY ELEMENT
First Claim
1. A liquid crystal display device comprising:
- a first substrate provided with an oriented film and a second substrate provided with an oriented film between two polarizing plates of which the planes of polarization are orthogonal to each other; and
a ferroelectric liquid crystal composition layer having a chiral smectic C-phase between the first and the second substrates, whereinat least one of the vertically oriented films of the first substrate and the second substrate is provided with orientation treatment capable of forming a pretilt angle in a certain direction;
the ferroelectric liquid crystal composition layer in which the C-director of the liquid crystal molecule is oriented in the certain direction at a portion being in contact with the substrate having the vertically oriented film provided with the orientation treatment;
the director of liquid crystal is twisted by at least 180°
between the first substrate and the second substrate;
a substrate surface of at least one of the first substrate and the second substrate is provided with a pair of electrode structures generating electric fields approximately parallel to each other; and
the light transmittance is modulated by varying the birefringence of the ferroelectric liquid crystal composition layer with the electric fields generated by the electrode structures.
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Accused Products
Abstract
A ferroelectric liquid crystal composition having a chiral smectic C-phase is disposed as a liquid crystal composition layer between a first substrate and a second substrate arranged between two polarizing plates of which the planes of polarization are orthogonal to each other. The substrates are provided with vertically oriented films, respectively, and at least one of them is provided with orientation treatment that can form a pretilt angle in a certain direction. The C-director of the liquid crystal molecule is oriented in the certain direction at a portion being in contact with the substrate provided with the orientation treatment and is twisted by at least 180° between the first substrate and the second substrate. At least one of the substrates is provided with a pair of electrode structures generating electric fields approximately parallel to each other.
12 Citations
8 Claims
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1. A liquid crystal display device comprising:
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a first substrate provided with an oriented film and a second substrate provided with an oriented film between two polarizing plates of which the planes of polarization are orthogonal to each other; and a ferroelectric liquid crystal composition layer having a chiral smectic C-phase between the first and the second substrates, wherein at least one of the vertically oriented films of the first substrate and the second substrate is provided with orientation treatment capable of forming a pretilt angle in a certain direction; the ferroelectric liquid crystal composition layer in which the C-director of the liquid crystal molecule is oriented in the certain direction at a portion being in contact with the substrate having the vertically oriented film provided with the orientation treatment; the director of liquid crystal is twisted by at least 180°
between the first substrate and the second substrate;a substrate surface of at least one of the first substrate and the second substrate is provided with a pair of electrode structures generating electric fields approximately parallel to each other; and the light transmittance is modulated by varying the birefringence of the ferroelectric liquid crystal composition layer with the electric fields generated by the electrode structures. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification