US4712874A
Expired / Lapsed
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Ferroelectric liquid crystal device having color filters on row or column electrodes
Assignee: Canon Inc
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Filing: 1986-12-19
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Granted: 1987-12-15
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Expires: 2006-12-19
Abstract
Abstract A ferroelectric liquid crystal device comprises a pair of substrates each provided with a stripe electrode, and a ferroelectric liquid crystal disposed between the substrates. At least one of the substrates has thereon a layer of discretely defined color filters disposed along the stripe electrode, and electroconductive or insulating films disposed between the discretely defined color filters.
Inventors
- 👤 Nobuyuki Sekimura
- 👤 Masaru Kamio
- 👤 Hideaki Takao
- 👤 Taiko Motoi
- 👤 Tatsuo Murata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:28
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1335; G02F1/133509; G02F1/133514; G02F1/137; G02F1/139; G02F1/141
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
55 words
A ferroelectric liquid crystal device, comprising a pair of substrates each provided with a stripe electrode and a ferroelectric liquid crystal disposed between the substrates; at least one of the substrates having thereon a layer of discretely defined color filters disposed along the stripe electrode and electroconductive films disposed between the discretely defined color filters.
Claim 2
Dependent Claim
55 words
A ferroelectric liquid crystal device, comprising a pair of substrates each provided with a stripe electrode and a ferroelectric liquid crystal disposed between the substrates; at least one of the substrates having thereon a layer of discretely defined color filters disposed along the stripe electrode and electroconductive films disposed between the discretely defined color filters.
Claim 3
Dependent Claim
21 words
A liquid crystal device according to claim 1, wherein said electroconductive films are disposed in electrical continuity with the stripe electrode.
Claim 4
Dependent Claim
31 words
A liquid crystal device according to claim 1, wherein an elongated electroconductive film is disposed along the longitudinal direction of the stripe electrode and in electrical continuity with the electroconductive films.
Claim 5
Dependent Claim
22 words
A liquid crystal device according to claim 1, wherein said layer of discretely defined color filters is disposed on the stripe electrode.
Claim 6
Dependent Claim
25 words
A liquid crystal device according to claim 1, wherein said layer of discretely defined color filters is disposed between the stripe electrode and the substrate.
Claim 7
Dependent Claim
19 words
A liquid crystal device according to claim 1, wherein said electroconductive films comprise a film of metal or alloy.
Claim 8
Dependent Claim
37 words
A liquid crystal device according to claim 1, wherein the difference between the height of said layer of color filters and the height of the electroconductive films, respectively from the substrate face, is 1000 Å or less.
Claim 9
Dependent Claim
37 words
A liquid crystal device according to claim 1, wherein the difference between the height of said layer of color filters and the height of the electroconductive films, respectively from the substrate face, is 500 Å or less.
Claim 10
Dependent Claim
34 words
A liquid crystal device according to claim 1, wherein said at least one substrate having the layer of color filters also has an alignment control film on its face contacting the ferroelectric liquid crystal.
Claim 11
Dependent Claim
18 words
A liquid crystal device according to claim 9, wherein said alignment control film has a uniaxial orientation axis.
Claim 12
Dependent Claim
17 words
A liquid crystal device according to claim 10, wherein said uniaxial orientation axis is a rubbing axis.
Claim 13
Dependent Claim
19 words
A liquid crystal device according to claim 10, wherein said uniaxial orientation axis is an oblique vapor deposition axis.
Claim 14
Dependent Claim
23 words
A liquid crystal device according to claim 1, wherein said color filters comprises an organic or inorganic film colored with a colored substance.
Claim 15
Dependent Claim
15 words
A liquid crystal device according to claim 13, wherein said colored substance is a colorant.
Claim 16
Dependent Claim
19 words
A liquid crystal device according to claim 1, wherein said ferroelectric liquid crystal is a chiral smectic liquid crystal.
Claim 17
Dependent Claim
32 words
A liquid crystal device according to claim 15, wherein said chiral smectic liquid crystal is disposed in a layer thin enough to release the helical structure of the chiral smectic liquid crystal.
Claim 18
Dependent Claim
84 words
A ferroelectric liquid crystal device, comprising a pair of substrates each provided with a stripe electrode and a ferroelectric liquid crystal disposed between the substrates; at least one of the substrates having thereon a layer of discretely defined color filters disposed along the stripe electrode and insulating films disposed between the discretely defined color filters, and the difference between the height of said layer of color filters and the height of the insulating films, respectively from the substrate face, being 1000 Å or less.
Claim 19
Dependent Claim
84 words
A ferroelectric liquid crystal device, comprising a pair of substrates each provided with a stripe electrode and a ferroelectric liquid crystal disposed between the substrates; at least one of the substrates having thereon a layer of discretely defined color filters disposed along the stripe electrode and insulating films disposed between the discretely defined color filters, and the difference between the height of said layer of color filters and the height of the insulating films, respectively from the substrate face, being 1000 Å or less.
Claim 20
Dependent Claim
37 words
A liquid crystal device according to claim 17, wherein the difference between the height of said layer of color filters and the height of the insulating films, respectively from the substrate face, is 500 Å or less.
Claim 21
Dependent Claim
34 words
A liquid crystal device according to claim 17, wherein said at least one substrate having the layer of color filters also has an alignment control film on its face contacting the ferroelectric liquid crystal.
Claim 22
Dependent Claim
18 words
A liquid crystal device according to claim 19, wherein said alignment control film has a uniaxial orientation axis.
Claim 23
Dependent Claim
17 words
A liquid crystal device according to claim 20, wherein said uniaxial orientation axis is a rubbing axis.
Claim 24
Dependent Claim
19 words
A liquid crystal device according to claim 20, wherein said uniaxial orientation axis is an oblique vapor deposition axis.
Claim 25
Dependent Claim
23 words
A liquid crystal device according to claim 17, wherein said color filters comprise an organic or inorganic film colored with a colored substance.
Claim 26
Dependent Claim
15 words
A liquid crystal device according to claim 23, wherein said colored substance is a colorant.
Claim 27
Dependent Claim
19 words
A liquid crystal device according to claim 17, wherein said ferroelectric liquid crystal is a chiral smectic liquid crystal.
Claim 28
Dependent Claim
32 words
A liquid crystal device according to claim 25, wherein said chiral smectic liquid crystal is disposed in a layer thin enough to release the helical structure of the chiral smectic liquid crystal.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-12-14 | 1991-06-15 | 1991-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-12-14 | 1995-06-15 | 1995-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-12-14 | 1999-06-15 | 1999-12-15 | $7700.00 | Window Closed / Lapsed |