US4842380A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid crystal optical elements
Assignee: Fujifilm Holdings Corp
•
Filing: 1987-08-19
•
Granted: 1989-06-27
•
Expires: 2007-08-19
Abstract
Abstract Disclosed is a liquid crystal optical element for use in information recording media and displays, which is composed of a polymeric liquid crystal and from 0.01% to 10% by weight, on the basis of the polymeric liquid crystal, of a biphenyl or biphenyl derivative of formula (I) ##STR1## wherein X and Y each represents a hydrogen atom, an alkyl group, an oxyalkyl group, a halogen atom, a nitrile group, or a nitro group. By the addition of the biphenyl or biphenyl derivative, the orientation of the polymeric liquid crystal is improved.
Inventors
- 👤 Takashi Takayanagi
- 👤 Hideo Kawaguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:49
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/04; C09K19/38; C09K19/3833; C09K19/3842; C09K19/3852; C09K19/3866; C09K19/52; C09K19/54; C09K19/56; G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/133365; G11; G11B; G11B7/00; G11B7/24; G11B7/241; G11B7/242; G11B7/244; G11B7/25; C09K2323/00
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
115 words
A liquid crystal optical element comprising a cell comprising two or more supports each having a transparent electroconductive layer, said cells containing a polymeric liquid crystal with positive dielectric anisotropy having a mesogenic biphenyl side chain, said polymeric liquid crystals being capable of being placed in the form of a vertically oriented state and being optically transparent in the vertically oriented state, and from 0.01% to 10% by weight, on the basis of said polymeric liquid crystal, of a non-liquid crystal biphenyl or biphenyl derivative represented by formula (I) ##STR8## wherein X and Y each represents a hydrogen atom, an alkyl group, an oxyalkyl group, a halogen atom, a nitrile group, or a nitro group.
Claim 2
Dependent Claim
115 words
A liquid crystal optical element comprising a cell comprising two or more supports each having a transparent electroconductive layer, said cells containing a polymeric liquid crystal with positive dielectric anisotropy having a mesogenic biphenyl side chain, said polymeric liquid crystals being capable of being placed in the form of a vertically oriented state and being optically transparent in the vertically oriented state, and from 0.01% to 10% by weight, on the basis of said polymeric liquid crystal, of a non-liquid crystal biphenyl or biphenyl derivative represented by formula (I) ##STR8## wherein X and Y each represents a hydrogen atom, an alkyl group, an oxyalkyl group, a halogen atom, a nitrile group, or a nitro group.
Claim 3
Dependent Claim
21 words
A liquid crystal optical element as in claim 1, wherein the biphenyl or biphenyl derivative is selected from the compounds ##STR9##
Claim 4
Dependent Claim
30 words
A liquid crystal optical element as in claim 1, wherein the polymeric liquid crystal is a polymeric compound having said mesogenic group via an alkyl chain in the side chain.
Claim 5
Dependent Claim
31 words
A liquid crystal optical element as in claim 1, wherein the polymeric liquid crystal is composed of three parts, consisting essentially of a main chain, a spacer, and a mesogenic group.
Claim 6
Dependent Claim
56 words
A liquid crystal optical element as in claim 4, wherein the main chain in the polymeric liquid crystal is a polyacrylate, polysiloxane, or polymethacrylate, the spacer therein is a methylene chain or an oxymethylene chain having from 2 to 18 carbon atoms, and the mesogenic group therein is selected from those represented by the formulae ##STR10##
Claim 7
Dependent Claim
31 words
A liquid crystal optical element as in claim 2, wherein the polymeric liquid crystal is composed of three parts consisting essentially of a main chain, a spacer, and a mesogenic group.
Claim 8
Dependent Claim
31 words
A liquid crystal optical element as in claim 3, wherein the polymeric liquid crystal is composed of three parts consisting essentially of a main chain, a spacer, and a mesogenic group.
Claim 9
Dependent Claim
166 words
A liquid crystal optical element as in claim 4, wherein the main chain in the polymeric liquid crystal is a polyacrylate, polysiloxane or polymethacrylate, the spacer therein is a methylene chain or an oxymethylene chain having from 2 to 18 carbon atoms, and the mesogenic group therein is selected from those represented by formulae ##STR11## wherein R represents --OCH 3 , --OC 2 H 5 , --OC 3 H 7 , --OC 4 H 9 , --OC 5 H 11 , --OC 6 H 13 , --CH 3 , --C 2 H 5 , --C 3 H 7 , --C 4 H 9 , --C 5 H 11 , --C 6 H 13 , --C 7 H 15 , --C 8 H 17 , H, Cl, Br, --C 9 H 19 , --C 10 H 21 --C 11 H 23 , --C 12 H 25 , --C 14 H 29 , --C 16 H 33 , and Chol represents a compound represented by the formula ##STR12##
Claim 10
Dependent Claim
167 words
A liquid crystal optical element as in claim 6, wherein the main chain in the polymeric liquid crystal is a polyacrylate, polysiloxane or polymethacrylate, the spacer therein is a methylene chain or an oxymethylene chain having from 2 to 18 carbon atoms, and the mesogenic group therein is selected from those represented by formulae ##STR13## wherein R represents --OCH 3 , --OC 2 H 5 , --OC 3 H 7 , --OC 4 H 9 , --OC 5 H 11 , --OC 6 H 13 , --CH 3 , --C 2 H 5 , --C 3 H 7 , --C 4 H 9 , --C 5 H 11 , --C 6 H 13 , --C 7 H 15 , --C 8 H 17 , H, Cl, Br, --C 9 H 19 , --C 10 H 21 , --C 11 H 23 , --C 12 H 25 , --C 14 H 29 , --C 16 H 33 , and Chol represents a compound represented by the formula ##STR14##
References Cited (Backward Citations)
US4011173A
Cited
US3947375A
Cited
US4027950A
Cited
US3983049A
Cited
US4118335A
Cited
US4180475A
Cited
US4293435A
Cited
US4462924A
Cited
JPS58125247A
Cited
US4631328A
Cited
DE3324770A1
Cited
US4702558A
Cited
US4650836A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-06-26 | 1992-12-26 | 1993-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-06-26 | 1996-12-26 | 1997-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-06-26 | 2000-12-26 | 2001-06-27 | $7700.00 | Window Closed / Lapsed |