Driving method for liquid crystal device
First Claim
1. A driving method for a liquid crystal device of the type comprising arranged picture elements each comprising oppositely spaced electrodes, and a ferroelectric liquid crystal layer and a dielectric layer disposed between the electrodes, said ferroelectric liquid crystal layer having a resistance R(Ω
- ) and a capacitance C1 (F), said dielectric layer having a capacitance C2 (F);
wherein a driving voltage having a pulse duration Δ
T(sec) set to satisfy the following formula (1) is applied to the picture elements;
##EQU7## wherein a is a coefficient satisfying the relationship of a<
|-Va|/|VON |, VON is a value of voltage (volt) applied to a picture element at the time of writing, -Va is a value of voltage (volt) of a reverse polarity applied to the picture element after the application of the writing voltage VON, b is a coefficient defined by the equation of b=|V1 |/|VON |, and V1 is the inversion initiation voltage (volts) of the liquid crystal layer.
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Abstract
A driving method for a liquid crystal device of the type comprising arranged picture elements each comprising oppositely spaced electrodes, and a ferroelectric liquid crystal layer and a dielectric layer disposed between the electrodes, the ferroelectric liquid crystal layer having a resistance R(Ω) and a capacitance C1 (F), the dielectric layer having a capacitance C2 (F); wherein a driving voltage having a pulse duration ΔT(sec) set to satisfy the following formula (1) is applied to the picture elements: ##EQU1## wherein a is a coefficient satisfying the relationship of a<|-Va|/|VON |, VON is a value of voltage (volt) applied to a picture element at the time of writing, -Va is a value of voltage (volt) of a reverse polarity applied to the picture element after the application of the writing voltage VON, b is a coefficient defined by the equation of b=|V1 |/|VON |, and V1 is the inversion initiation voltage (volts) of the liquid crystal layer.
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Citations
24 Claims
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1. A driving method for a liquid crystal device of the type comprising arranged picture elements each comprising oppositely spaced electrodes, and a ferroelectric liquid crystal layer and a dielectric layer disposed between the electrodes, said ferroelectric liquid crystal layer having a resistance R(Ω
- ) and a capacitance C1 (F), said dielectric layer having a capacitance C2 (F);
wherein a driving voltage having a pulse duration Δ
T(sec) set to satisfy the following formula (1) is applied to the picture elements;
##EQU7## wherein a is a coefficient satisfying the relationship of a<
|-Va|/|VON |, VON is a value of voltage (volt) applied to a picture element at the time of writing, -Va is a value of voltage (volt) of a reverse polarity applied to the picture element after the application of the writing voltage VON, b is a coefficient defined by the equation of b=|V1 |/|VON |, and V1 is the inversion initiation voltage (volts) of the liquid crystal layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
- ) and a capacitance C1 (F), said dielectric layer having a capacitance C2 (F);
Specification