US5101289A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chiral smectic color display device with interval between color filters: color filter film thickness ratio of 0-5
Assignee: Canon Inc
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Filing: 1989-10-02
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Granted: 1992-03-31
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Expires: 2009-10-02
Abstract
Abstract A chiral smectic liquid crystal color display device has plural non-overlapping color filters arranged at intervals such that 0≦l/d≦5 wherein l (μm) is the interval between color filters and d (μm) is the color filter film thickness.
Inventors
- 👤 Hideaki Takao
- 👤 Tatsuo Murata
- 👤 Junichiro Kanbe
- 👤 Miki Tamura
- 👤 Masaru Kamio
- 👤 Nobuyuki Sekimura
- 👤 Yoshiki Kikuchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:01
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1335; G02F1/133509; G02F1/133514
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
138 words
A liquid crystal device, comprising: a pair of transparent electrodes having a plurality of confronting portions formed therebetween; a pair of substrates, one of said pair of substrates supporting each of said pair of transparent electrodes; a group of color filters comprising a plurality of non-overlapping color filters arranged on the inner side of at least one of said pair of substrates, said plurality of color filters being arranged at positions corresponding to each of said plurality of confronting portions, such that the relationship 0≦l/d≦5 is satisfied wherein l (μm) is the interval between the color filters of adjacent confronting portions and d(μm) is the film thickness of said color filters; and a chiral smectic liquid crystal provided between said pair of substrates, wherein the formation of the spiral structure of said chiral smectic liquid crystal is suppressed.
Claim 2
Dependent Claim
138 words
A liquid crystal device, comprising: a pair of transparent electrodes having a plurality of confronting portions formed therebetween; a pair of substrates, one of said pair of substrates supporting each of said pair of transparent electrodes; a group of color filters comprising a plurality of non-overlapping color filters arranged on the inner side of at least one of said pair of substrates, said plurality of color filters being arranged at positions corresponding to each of said plurality of confronting portions, such that the relationship 0≦l/d≦5 is satisfied wherein l (μm) is the interval between the color filters of adjacent confronting portions and d(μm) is the film thickness of said color filters; and a chiral smectic liquid crystal provided between said pair of substrates, wherein the formation of the spiral structure of said chiral smectic liquid crystal is suppressed.
Claim 3
Dependent Claim
39 words
A liquid crystal device according to claim 1, wherein said color filters are arranged between one of said pair of substrates and said one of said pair of transparent electrodes formed on said one of said pair of substrates.
Claim 4
Dependent Claim
27 words
A liquid crystal device according to claim 2, wherein a protective film is arranged between said color filters and said one of said pair of transparent electrodes.
Claim 5
Dependent Claim
41 words
A liquid crystal device according to claim 1, wherein said color filters are formed according to the photolithographic step of a color resin comprising a colorant material dispersed in a low-temperature-curing polyamino type resin having a photosensitive group in the molecule.
Claim 6
Dependent Claim
40 words
A liquid crystal device according to claim 4, wherein said polyamino type resin is an aromatic polyamide resin or polyimide resin having photosensitive group in the molecule and is capable of giving a cured film at 200° C. or lower.
Claim 7
Dependent Claim
14 words
A liquid crystal device according to claim 1, further comprising an alignment control film.
Claim 8
Dependent Claim
21 words
A liquid crystal device according to claim 1, wherein a monoaxial alignment treatment axis is imparted to said alignment control film.
Claim 9
Dependent Claim
19 words
A liquid crystal device according to claim 7, wherein said monoaxial alignment treatment axis is a rubbing treated axis.
Claim 10
Dependent Claim
26 words
A liquid crystal device according to claim 1, wherein said color filters have a film thickness in the range of from 0.5 μm to 5 μm.
Claim 11
Dependent Claim
22 words
A liquid crystal device according to claim 1, wherein said color filters exhibit blue, green or red color per each color filter.
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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) | 1995-03-31 | 1995-09-30 | 1996-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-03-31 | 1999-09-30 | 2000-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-03-31 | 2003-09-30 | 2004-03-31 | $7700.00 | Window Closed / Lapsed |