Patent US5270844A successfully refreshed from Google Patents.
US5270844A
Expired / Lapsed
US
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Liquid crystal optical element with minute insulation portions on the electrodes
Assignee: Canon Inc
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Filing: 1992-12-03
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Granted: 1993-12-14
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Expires: 2012-12-03
Abstract
Abstract A liquid crystal optical element comprising a pair of electrode substrates having an electrode and a substrate and a chiral smectic liquid crystal disposed between said pair of electrode substrates, wherein an electrode on at least one of said pair of electrode substrates is provided regularly or randomly with minute insulation portions.
Inventors
- 👤 Tomoko Maruyama
- 👤 Shuzo Kaneko
- 👤 Ryoji Fujiwara
- 👤 Tomoko Murakami
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:56
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/133345; G02F1/137; G02F1/139; G02F1/141
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
54 words
A liquid crystal optical element comprising a pair of electrode substrates having an electrode and a substrate and a chiral smectic liquid crystal disposed between said pair of electrode substrates, characterized in that: an electrode on at least one of said pair of electrode substrates is provided regularly or randomly with minute insulation portions.
Claim 2
Dependent Claim
54 words
A liquid crystal optical element comprising a pair of electrode substrates having an electrode and a substrate and a chiral smectic liquid crystal disposed between said pair of electrode substrates, characterized in that: an electrode on at least one of said pair of electrode substrates is provided regularly or randomly with minute insulation portions.
Claim 3
Dependent Claim
24 words
The liquid crystal optical element according to claim 1, wherein an orientation film is formed on said electrode provided with said minute insulation portions.
Claim 4
Dependent Claim
20 words
The liquid crystal optical element according to claim 2, wherein said orientation film is formed of a rubbed polymer film.
Claim 5
Dependent Claim
22 words
The liquid crystal optical element according to claim 2, wherein said orientation film is an SiO film formed by oblique vapor deposition.
Claim 6
Dependent Claim
27 words
The liquid crystal optical element according to claim 1, wherein said minute insulation portions formed of a number of polymer films each having a two-dimentional minute area.
Claim 7
Dependent Claim
22 words
The liquid crystal optical element according to claim 1, wherein said minute insulation portions are formed by doping oxygen into said electrode.
Claim 8
Dependent Claim
32 words
The liquid crystal optical element according to claim 1, wherein said minute insulation portions are selectively formed on a conductive polymer film containing ultrafine particles dispersed therein and provided on said electrode.
Claim 9
Dependent Claim
28 words
The liquid crystal optical element according to claim 1, wherein said minute insulation portions are formed of fine insulating fibers of a porous member provided on said electrode.
Claim 10
Dependent Claim
65 words
A liquid crystal optical element comprising a pair of electrode substrates having an electrode and a substrate and a chiral smectic liquid crystal disposed between said pair of electrode substrates, characterized in that: an electrode on at least one of said pair of electrode substrates is formed regularly or randomly with minute insulation portions sufficient to suppress the movement of charges transversal to said electrode.
Claim 11
Dependent Claim
65 words
A liquid crystal optical element comprising a pair of electrode substrates having an electrode and a substrate and a chiral smectic liquid crystal disposed between said pair of electrode substrates, characterized in that: an electrode on at least one of said pair of electrode substrates is formed regularly or randomly with minute insulation portions sufficient to suppress the movement of charges transversal to said electrode.
Claim 12
Dependent Claim
91 words
A liquid crystal optical element comprising a pair of electrode substrates having an electrode and a substrate and a chiral smectic liquid crystal disposed between said pair of electrode substrates, characterized in that: an electrode on at least one of said pair of electrode substrates is formed regularly or randomly with minute insulation films so that the movement of charges transversal to said electrode can be suppressed, and the movement of charges in a direction of film thickness in said electrode may be faster than that in a transverse direction thereof.
Claim 13
Dependent Claim
91 words
A liquid crystal optical element comprising a pair of electrode substrates having an electrode and a substrate and a chiral smectic liquid crystal disposed between said pair of electrode substrates, characterized in that: an electrode on at least one of said pair of electrode substrates is formed regularly or randomly with minute insulation films so that the movement of charges transversal to said electrode can be suppressed, and the movement of charges in a direction of film thickness in said electrode may be faster than that in a transverse direction thereof.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1996-12-13 | 1997-06-14 | 1997-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-12-13 | 2001-06-14 | 2001-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-12-13 | 2005-06-14 | 2005-12-14 | $7700.00 | Window Closed / Lapsed |