US5372745A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid crystal device, display apparatus using same and display method using same
Assignee: Canon Inc
•
Filing: 1991-11-08
•
Granted: 1994-12-13
•
Expires: 2011-11-08
Abstract
Abstract A liquid crystal device is constituted by disposing a display layer between a pair of electrode plates. The display layer comprises a mesomorphic polymer and a low-molecular weight mesomorphic compound. The mesomorphic polymer may preferably be a main chain-type mesomorphic polymer having an ester linkage or a mesomorphic polymer derived from a polymerizable mesomorphic compound. The display layer may preferably comprise a mesomorphic polymer having a dielectric anisotropy Δε of -3.0 or below and a low-molecular weight mesomorphic compound incompatible with the mesomorphic polymer and having a positive dielectric anisotropy.
Inventors
- 👤 Kazuo Yoshinaga
- 👤 Hidetoshi Suzuki
- 👤 Katsumi Kurematsu
- 👤 Yomishi Toshida
- 👤 Toshikazu Ohnishi
- 👤 Hideaki Mitsutake
- 👤 Nobuo Minoura
- 👤 Koichi Sato
- 👤 Takeo Eguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:38
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/04; C09K19/38; C09K19/3804; C09K19/3809; C09K19/52; C09K19/54; C09K19/542; C09K19/544
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
60 words
A liquid crystal device, comprising: a pair of electrode plates and a display layer disposed therebetween comprising a main chain-type mesomorphic polymer having an ester linkage and a low-molecular weight mesomorphic compound incompatible with said main chain-type mesomorphic polymer, wherein said low-molecular weight mesomorphic compound is dispersed in said mesomorphic polymer to have an average particle diameter of 0.1-10 μm.
Claim 2
Dependent Claim
60 words
A liquid crystal device, comprising: a pair of electrode plates and a display layer disposed therebetween comprising a main chain-type mesomorphic polymer having an ester linkage and a low-molecular weight mesomorphic compound incompatible with said main chain-type mesomorphic polymer, wherein said low-molecular weight mesomorphic compound is dispersed in said mesomorphic polymer to have an average particle diameter of 0.1-10 μm.
Claim 3
Dependent Claim
18 words
A device according to claim 1, which further comprises an alignment control later formed on said electrode plates.
Claim 4
Dependent Claim
35 words
A display apparatus, including: a liquid crystal device according to claim 1, means for emitting light, means for applying voltage to said device, and means for separating said light into transmitted light and scattered light.
Claim 5
Dependent Claim
24 words
A display method, comprising: illuminating a liquid crystal device according to claim 1 with light and effecting display by employing the resultant scattered light.
Claim 6
Dependent Claim
42 words
A method, according to claim 4, wherein an electric field is applied to said liquid crystal device to cause an electric field response of said low-molecular weight mesomorphic compound, which response results in a difference in scattering degree of said scattered light.
Claim 7
Dependent Claim
72 words
A liquid crystal device, comprising: a pair of electrode plates and a display layer disposed therebetween comprising a mesomorphic polymer and a low-molecular weight mesomorphic compound, wherein said mesomorphic polymer has been formed through polymerization in mesomorphic state of a composition comprising a polymerizable mesomorphic monomer and the low-molecular weight mesomorphic compound, the low-molecular weight mesomorphic compound is dispersed in said mesomorphic polymer to have an average particle diameter of 0.1-10 μm.
Claim 8
Dependent Claim
72 words
A liquid crystal device, comprising: a pair of electrode plates and a display layer disposed therebetween comprising a mesomorphic polymer and a low-molecular weight mesomorphic compound, wherein said mesomorphic polymer has been formed through polymerization in mesomorphic state of a composition comprising a polymerizable mesomorphic monomer and the low-molecular weight mesomorphic compound, the low-molecular weight mesomorphic compound is dispersed in said mesomorphic polymer to have an average particle diameter of 0.1-10 μm.
Claim 9
Dependent Claim
18 words
A device according to claim 6, wherein said mesomorphic polymer is incompatible with said low-molecular weight mesomorphic compound.
Claim 10
Dependent Claim
18 words
A device according to claim 6, which further comprises an alignment control layer formed on said electrode plates.
Claim 11
Dependent Claim
35 words
A display apparatus, including: a liquid crystal device according to claim 6, means for emitting light, means for applying voltage to said device, and means for separating said light into transmitted light and scattered light.
Claim 12
Dependent Claim
24 words
A display method, comprising: illuminating a liquid crystal device according to claim 6 with light and effecting display by employing the resultant scattered light.
Claim 13
Dependent Claim
42 words
A method, according to claim 10, wherein an electric field is applied to said liquid crystal device to cause an electric field response of said low-molecular weight mesomorphic compound, which response results in a difference in scattering degree of said scattered light.
Claim 14
Dependent Claim
67 words
A liquid crystal device, comprising: a pair of electrode plates and a display layer disposed therebetween comprising a mesomorphic polymer having a dielectric anisotropy Δε of -3.0 or below and a low-molecular weight mesomorphic compound incompatible with said mesomorphic polymer and having a positive dielectric anisotropy, wherein said low-molecular weight mesomorphic compound is dispersed in said mesomorphic polymer to have an average particle diameter of 0.1-10 μm.
Claim 15
Dependent Claim
67 words
A liquid crystal device, comprising: a pair of electrode plates and a display layer disposed therebetween comprising a mesomorphic polymer having a dielectric anisotropy Δε of -3.0 or below and a low-molecular weight mesomorphic compound incompatible with said mesomorphic polymer and having a positive dielectric anisotropy, wherein said low-molecular weight mesomorphic compound is dispersed in said mesomorphic polymer to have an average particle diameter of 0.1-10 μm.
Claim 16
Dependent Claim
18 words
A device according to claim 12, which further comprises an alignment control layer formed on said electrode plates.
Claim 17
Dependent Claim
23 words
A device according to claim 12, wherein said mesomorphic polymer is obtained from a polymerizable mesomorphic monomer by polymerization in a mesomorphic state.
Claim 18
Dependent Claim
18 words
A device according to claim 14, which further comprises an alignment control layer formed on said electrode plates.
Claim 19
Dependent Claim
35 words
A display apparatus, including: a liquid crystal device according to claim 12, means for emitting light, means for applying voltage to said device, and means for separating said light into transmitted light and scattered light.
Claim 20
Dependent Claim
35 words
A display apparatus, including: a liquid crystal device according to claim 14, means for emitting light, means for applying voltage to said device, and means for separating said light into transmitted light and scattered light.
Claim 21
Dependent Claim
24 words
A display method, comprising: illuminating a liquid crystal device according to claim 12 with light and effecting display by employing the resultant scattered light.
Claim 22
Dependent Claim
24 words
A display method, comprising: illuminating a liquid crystal device according to claim 14 with light and effecting display by employing the resultant scattered light.
Claim 23
Dependent Claim
42 words
A method, according to claim 18, wherein a electric field is applied to said liquid crystal device to cause an electric field response of said low-molecular weight mesomorphic compound, which response results in a difference in scattering degree of said scattered light.
Claim 24
Dependent Claim
42 words
A method, according to claim 19, wherein an electric field is applied to said liquid crystal device to cause an electric field response of said low-molecular weight mesomorphic compound, which response results in a difference in scattering degree of said scattered light.
References Cited (Backward Citations)
US4707080A
Cited
US4435047A
Cited
US4844597A
Cited
US4886718A
Cited
EP0292244A2
Cited
EP0295106A2
Cited
WO1989009807A1
Cited
US5066107A
Cited
US5011623A
Cited
WO1990015854A1
Cited
EP0451905A1
Cited
US5188760A
Cited
US5268783A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-12-12 | 1998-06-13 | 1998-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-12-12 | 2002-06-13 | 2002-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-12-12 | 2006-06-13 | 2006-12-13 | $7700.00 | Window Closed / Lapsed |