EP0220747A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Ferroelectric smectic C mixture, method for controlling its tilt angle, and light switching element
Assignee: JNC Corp
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Filing: 1986-10-31
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Granted: —
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Expires: 2006-10-31
Abstract
Abstract A method of controlling the tilt angle of ferroelectric chiral smectic C (S C *) phase of a liquid crystal mixture is provided by making smectic A (S A ) phase present in the mixture to thereby control the tilt angle to 16 - 29°, or by making S A phase absent therein to thereby control the angle to 32 - 58°, the former method being suitably applied to birefringence display and the latter, to guest-host display, the ferroelectric smectic C mixture obtained in the method and a light switching element using said mixture are disclosed.
Inventors
- 👤 Kenji Furukawa
- 👤 Kanetsugu Terashima
- 👤 Mitsuyoshi Ichihashi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-10 02:20
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/137; G02F1/139; G02F1/141; C; C09; C09K; C09K19/00; C09K19/02; C09K19/0225
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
144 words
In the preparation of a ferroelectric smectic C mixture having at least two components at least one of which is a liquid crystal compound having smectic A phase and ferroelectric smectic C phase or at least two components comprising a liquid crystal compound having smectic C phase and smectic A phase and a chiral compound, a method for controlling the tilt angle of said ferroelectric smectic C mixture, which method comprises having said components having smectic A phase contained in said ferroelectric liquid crystal mixture in excess of the quantity of at least one compound having no smectic A phase contained in said at least two components, so that said ferroelectric smectic C mixture exhibits smectic A phase, to thereby be able to adjust the tilt angle of said ferroelectric smectic C phase to a definite value in the range of 16° to 29°.
Claim 2
Dependent Claim
144 words
In the preparation of a ferroelectric smectic C mixture having at least two components at least one of which is a liquid crystal compound having smectic A phase and ferroelectric smectic C phase or at least two components comprising a liquid crystal compound having smectic C phase and smectic A phase and a chiral compound, a method for controlling the tilt angle of said ferroelectric smectic C mixture, which method comprises having said components having smectic A phase contained in said ferroelectric liquid crystal mixture in excess of the quantity of at least one compound having no smectic A phase contained in said at least two components, so that said ferroelectric smectic C mixture exhibits smectic A phase, to thereby be able to adjust the tilt angle of said ferroelectric smectic C phase to a definite value in the range of 16° to 29°.
Claim 3
Dependent Claim
149 words
In the preparation of a ferroelectric smectic C mixture having at least two components at least one of which is a liquid crystal compound having ferroelectric smectic C phase and having no smectic A phase or at least two components comprising a liquid crystal compound having smectic C phase and having no smectic A phase and a chiral compound, a method for controlling the tilt angle of said ferroelectric smectic C mixture, which method comprises having at least one component having no smectic A phase contained in said ferroelectric liquid crystal mixture in excess of the quantity of said components having smectic A phase contained in said at least wo components, so that said ferroelectric smectic C mixture exhibits no smectic A phase, to thereby be able to adjust the tilt angle of said ferroelectric smectic C phase to a definite value in the range of 32° to 58°.
Claim 4
Dependent Claim
149 words
In the preparation of a ferroelectric smectic C mixture having at least two components at least one of which is a liquid crystal compound having ferroelectric smectic C phase and having no smectic A phase or at least two components comprising a liquid crystal compound having smectic C phase and having no smectic A phase and a chiral compound, a method for controlling the tilt angle of said ferroelectric smectic C mixture, which method comprises having at least one component having no smectic A phase contained in said ferroelectric liquid crystal mixture in excess of the quantity of said components having smectic A phase contained in said at least wo components, so that said ferroelectric smectic C mixture exhibits no smectic A phase, to thereby be able to adjust the tilt angle of said ferroelectric smectic C phase to a definite value in the range of 32° to 58°.
Claim 5
Dependent Claim
13 words
A ferroelectric smectic C mixture obtained according to the method of claim 1.
Claim 6
Dependent Claim
13 words
A ferroelectric smectic C mixture obtained according to the method of claim 2.
Claim 7
Dependent Claim
24 words
A light switching element having applied the chiral smectic C phase exhibited by a ferroelectric liquid crystal mixture as set forth in claim 3.
Claim 8
Dependent Claim
24 words
A light switching element having applied the chiral smectic C phase exhibited by a ferroelectric liquid crystal mixture as set forth in claim 4.
References Cited (Backward Citations)
No citation records indexed.
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