EP0227419A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Ferroelectric liquid crystal mixture and optical modulation element using same
Assignee: Panasonic Holdings Corp
•
Filing: 1986-12-16
•
Granted: —
•
Expires: 2006-12-16
Abstract
Abstract The invention easily produces ferroelectric liquid crystal mixture featuring extended helical structure by initially blending chiral materials having helical structure being opposite from each other in order to extend pitch of ferroelectric liquid crystal mixture followed by blending of a non-chiral material free from helical structure into the prepared liquid crystal mixture. As a result, ferroelectric liquid crystal optical modulation element incorporating the blended mixture exhibits satisfactory orientation characteristic, thus eventually generating high-grade display.
Inventors
- 👤 Tsuyoshi Uemura
- 👤 Noriko Ohba
- 👤 Naohide Wakita
- 👤 Hiroyuki Ohnishi
- 👤 Isao Ota
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 00:58
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/137; G02F1/139; G02F1/141; C; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/08; C09K19/10; C09K19/20; C09K19/2007; C09K19/2021
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
34 words
A ferroelectric liquid crystal mixture comprising a mixture of chiral materials having at least one of helical directions of either choresteric phase or ferroelectric phase being opposite from each other; and a non-chiral material.
Claim 2
Dependent Claim
34 words
A ferroelectric liquid crystal mixture comprising a mixture of chiral materials having at least one of helical directions of either choresteric phase or ferroelectric phase being opposite from each other; and a non-chiral material.
Claim 3
Dependent Claim
31 words
The ferroelectric liquid crystal mixture in accordance with claim 1, in which said non-chiral material is substantially liquid crystal having smectic C phase. or smectic I phase, or smectic G phase.
Claim 4
Dependent Claim
21 words
The ferroelectric liquid crystal mixture in accordance with claim 1, in which said mixture of said chiral materials is liquid crystal.
Claim 5
Dependent Claim
22 words
The ferroelectric liquid crystal mixture in accordance with claim 1, in which said mixture of said chiral materials is ferroelectric liquid crystal.
Claim 6
Dependent Claim
23 words
The ferroelectric liquid crystal mixture in accordance with claim 1, in which said mixture of said chiral materials has smectic C chiral phase.
Claim 7
Dependent Claim
30 words
The ferroelectric liquid crystal mixture in accordance with claim 1, in which said mixture of said chiral materials is ferroelectric liquid crystal, and said non-chiral material has smectic C phase.
Claim 8
Dependent Claim
33 words
The ferroelectric liquid crystal mixture in accordance with claim 1, in which said mixture of said chiral materials has smectic C chiral phase, and said non-chiral material has smectic C phase as well.
Claim 9
Dependent Claim
24 words
The ferroelectric liquid crystal mixture in accordance with claim 1. in which said helical direction is substantially helical direction of ferroelectric liquid crystal phase.
Claim 10
Dependent Claim
30 words
The ferroelectric liquid crystal mixture in accordance with claim 1, in which a pitch of ferroelectric liquid crystal phase of said ferroelectric liquid crystal mixture is at least 10 um.
Claim 11
Dependent Claim
22 words
The ferroelectric liquid crystal mixture in accordance with claim 1, in which said helical direction is substantially helical direction of choresteric phase.
Claim 12
Dependent Claim
45 words
The ferroelectric liquid crystal mixture in accordance with claim 1, in which a pitch of said choresteric phase is at least 10 um when said ferroelectric liquid crystal mixture has choresteric phase at any temperature higher than a shifting-temperature of said ferroelectric liquid crystal phase.
Claim 13
Dependent Claim
72 words
A ferroelectric liquid crystal optical modulation element comprising: a liquid crystal layer; a plurality of substrates including at least a transparent substrate, which are arranged for sandwiching said liquid crystal layer; and voltage applying means set to said substrates so that voltage can be delivered to said liquid crystal layer; wherein said liquid crystal layer is substantially made of ferroelectric liquid crystal mixture according to any one of claims 1 to 11.
Claim 14
Dependent Claim
82 words
A ferroelectric liquid crystal optical modulation element comprising: a liquid crystal layer; a plurality of substrates including at least a transparent substrate, which are arranged for sandwiching said liquid crystal layer; and voltage applying means set to said substrates so that voltage can delivered to said liquid crystal layer; wherein said liquid crystal layer is substantially made of ferroelectric liquid crystal mixture obtained by mixing a mixture containing chiral materials having helical directions being opposite from each other with a non-chiral material.
Claim 15
Dependent Claim
82 words
A ferroelectric liquid crystal optical modulation element comprising: a liquid crystal layer; a plurality of substrates including at least a transparent substrate, which are arranged for sandwiching said liquid crystal layer; and voltage applying means set to said substrates so that voltage can delivered to said liquid crystal layer; wherein said liquid crystal layer is substantially made of ferroelectric liquid crystal mixture obtained by mixing a mixture containing chiral materials having helical directions being opposite from each other with a non-chiral material.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.