US5394256A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Encapsulated liquid crystal in liquid crystal material where one liquid crystal has positive birefringence and dielectric anisotropy, the other has only one positive of birefringence and dielectric anisotropy
Assignee: Sharp Corp
•
Filing: 1992-10-30
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Granted: 1995-02-28
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Expires: 2012-10-30
Abstract
Abstract A liquid crystal display comprises transparent electrodes formed on opposite surfaces of a pair of transparent substrates and a liquid crystal layer filled between the transparent substrate, in which the liquid crystal layer is formed of at least two kinds of liquid crystals which are separated each other and provided in the form of a layer in the direction horizontal to the substrate, a first kind of liquid crystal includes at least one kind of liquid crystal (liquid crystal I) showing that dielectric constant anisotropy Δε>0 and refractive index anisotropy Δn>0 and a second kind of liquid crystal includes at least one kind of liquid crystal (liquid crystal II) showing that the dielectric constant anisotropy Δε<0 and the refractive index anisotropy Δn>0 or liquid crystal (liquid crystal III) showing that the dielectric constant anisotropy Δε>0 and the refractive index anisotropy Δn<0.
Inventors
- 👤 Nobuaki Yamada
- 👤 Toshiyuki Hirai
- 👤 Noriaki Onishi
- 👤 Shuichi Koozaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 12:10
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/02; C09K19/52; C09K19/54; C09K19/542; C09K19/544; G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1334; G02F1/1347; G02F1/13476
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
160 words
A liquid crystal display comprising: transparent electrodes formed on opposite surfaces of a pair of transparent substrates and a liquid crystal layer filled between said transparent substrate; in which the liquid crystal layer is formed of at least two kinds of liquid crystals which are separated from each other and provided in the form of a layer in the direction horizontal to the substrate, a first kind of liquid crystal includes at least one kind of liquid crystal (liquid crystal I) showing dielectric constant anisotropy Δε>0 and refractive index anisotropy Δn >0 and a second kind of liquid crystal includes at least one kind of liquid crystal (liquid crystal II) showing the dielectric constant anisotropy Δε<0 and the refractive index anisotropy Δn>0 or liquid crystal (liquid crystal III) showing the dielectric constant anisotropy Δε>0 and the refractive index anisotropy Δn<0, wherein one kind of liquid crystal is encapsulated in a micro-capsule, the micro-capsule being disposed in the other liquid crystal.
Claim 2
Dependent Claim
160 words
A liquid crystal display comprising: transparent electrodes formed on opposite surfaces of a pair of transparent substrates and a liquid crystal layer filled between said transparent substrate; in which the liquid crystal layer is formed of at least two kinds of liquid crystals which are separated from each other and provided in the form of a layer in the direction horizontal to the substrate, a first kind of liquid crystal includes at least one kind of liquid crystal (liquid crystal I) showing dielectric constant anisotropy Δε>0 and refractive index anisotropy Δn >0 and a second kind of liquid crystal includes at least one kind of liquid crystal (liquid crystal II) showing the dielectric constant anisotropy Δε<0 and the refractive index anisotropy Δn>0 or liquid crystal (liquid crystal III) showing the dielectric constant anisotropy Δε>0 and the refractive index anisotropy Δn<0, wherein one kind of liquid crystal is encapsulated in a micro-capsule, the micro-capsule being disposed in the other liquid crystal.
Claim 3
Dependent Claim
29 words
A liquid crystal display according to claim 1, in which the encapsulated liquid crystal is the liquid crystal I and the other liquid crystal is the liquid crystal II.
Claim 4
Dependent Claim
35 words
A liquid crystal display according to claim 1, in which the encapsulated liquid crystal is a smectic, nematic or chiral nematic liquid crystal to which a guest-host type of dichroic dye or pigment is mixed.
Claim 5
Dependent Claim
26 words
A liquid crystal display according to claim 1, in which the encapsulated liquid crystal layer is previously oriented by applying an electric field or magnetic field.
Claim 6
Dependent Claim
34 words
A liquid crystal display according to claim 1, in which the liquid crystal II shows that the dielectric constant anisotropy Δε is less than 0 and refractive index anisotropy n is 0.02 to 0.15.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-02-27 | 1998-08-29 | 1999-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-02-27 | 2002-08-29 | 2003-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-02-27 | 2006-08-29 | 2007-02-28 | $7700.00 | Window Closed / Lapsed |