EP0226218A2
Expired / Lapsed
EP
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Liquid crystal device
Assignee: Canon Inc
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Filing: 1986-12-17
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Granted: —
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Expires: 2006-12-17
Abstract
Abstract A liquid crystal device comprises a pair of substrates (33a, b) and a ferroelectric liquid crystal (35) disposed between the substrates. At least one of the substrates has thereon a color filter layer (31) and a protection layer (32) for preventing direct contact between the color filter and the ferroelectric liquid crystal. Particulate spacers are preferably disposed between the substrates. The protection layer preferably comprises a film having a pencil hardness of HB or harder (JIS K 5401).
Inventors
- 👤 Nobuyuki Sekimura
- 👤 Akio Yoshida
- 👤 Masaki Kuribayashi
- 👤 Masaru Kamio
- 👤 Hideaki Takao
- 👤 Tatsuo Murata
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 08:14
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1335; G02F1/133509; G02F1/133514; G02F1/133345; G02F1/133519; G02F1/1337; G02F1/137; G02F1/139; G02F1/141; G02F1/15; G02F1/153; G02F1/1533; G02F2001/1536
Claims Analysis
Total Claims: 48
Claim 1
Independent Claim
52 words
A liquid crystal device, comprising: a pair of substrates and a ferroelectric liquid crystal disposed between the pair of substrates; at least one of the pair of substrates having thereon a color filter layer and a protection layer for preventing direct contact between the color filter layer and the ferroelectric liquid crystal.
Claim 2
Dependent Claim
52 words
A liquid crystal device, comprising: a pair of substrates and a ferroelectric liquid crystal disposed between the pair of substrates; at least one of the pair of substrates having thereon a color filter layer and a protection layer for preventing direct contact between the color filter layer and the ferroelectric liquid crystal.
Claim 3
Dependent Claim
19 words
A liquid crystal device according to Claim 1, wherein said ferroelectric liquid crystal is a chiral smectic liquid crystal.
Claim 4
Dependent Claim
31 words
A liquid crystal device according to Claim 2, wherein said ferroelectric liquid crystal is disposed in a layer thin enough to unwind the helical structure of the chiral smectic liquid crystal.
Claim 5
Dependent Claim
26 words
A liquid crystal device according to Claim 1, wherein said color filter layer was provided to each pixel so as to define a color pixel unit.
Claim 6
Dependent Claim
38 words
A liquid crystal device according to Claim 4, wherein said at least one substrate has three types of color pixels units including a blue color pixel unit, a green color pixel unit and a red color pixel unit.
Claim 7
Dependent Claim
17 words
A liquid crystal device according to Claim 1, wherein said protection layer has a uniaxial orientation axis.
Claim 8
Dependent Claim
18 words
A liquid crystal device according to Claim 1, wherein said protection layer also serves as an insulating film.
Claim 9
Dependent Claim
20 words
A liquid crystal device according to Claim 1, wherein said protection layer comprises a film of an inorganic insulating material.
Claim 10
Dependent Claim
57 words
A liquid crystal device according to Claim 8, wherein said inorganic insulating material comprises at least one member selected from the group consisting of silicon nitride, silicon nitride containing hydrogen, silicon carbide, silicon carbide containing hydrogen, silicon oxide, boron nitride, boron nitride containing hydrogen, cerium oxide, aluminum oxide, zirconium oxide, titanium oxide, magnesium fluoride, SiO and SiO₂.
Claim 11
Dependent Claim
20 words
A liquid crystal device according to Claim 1, wherein said protection layer comprises a film of an organic insulating material.
Claim 12
Dependent Claim
51 words
A liquid crystal device according to Claim 10, wherein said organic insulating material comprises at least one member selected from the group consisting of polyvinyl alcohol, polyimide, polyamideimide, polyesterimide, polyparaxylylene, polyester, polycarbonate, polyvinyl acetal, polyvinyl chloride, polyvinyl acetate, polyamide, polystyrene, cellulose resin, melamine resin, urea resin, acrylic resin and photoresist resin.
Claim 13
Dependent Claim
25 words
A liquid crystal device according to Claim 1, wherein said color filter layer comprises colored polyimide, colored polyamide, colored polyamideimide, colored polyesterimide or colored polyester.
Claim 14
Dependent Claim
30 words
A liquid crystal device according to Claim 1, wherein said color filter layer comprises a dye or pigment which is not mutually soluble with the material constituting said protection layer.
Claim 15
Dependent Claim
17 words
A liquid crystal device according to Claim 6, wherein said uniaxial orientation axis is a rubbing-treated axis.
Claim 16
Dependent Claim
21 words
A liquid crystal device according to Claim 1, wherein said protection layer comprises a laminated structure including a plurality of layers.
Claim 17
Dependent Claim
26 words
A liquid crystal device according to Claim 15, wherein said laminated structure includes a layer of inorganic insulating material and a layer of organic insulating material.
Claim 18
Dependent Claim
36 words
A liquid crystal device according to Claim 1, wherein said pair of substrates respectively have an electrode, and at least one of the substrates has said color filter layer and the protection layer on the electrode.
Claim 19
Dependent Claim
42 words
A liquid crystal device according to Claim 1, wherein said pair of substrates respectively have an electrode, and at least one of the substrates has a color filter layer between the substrate and the electrode, and said protection layer on the electrode.
Claim 20
Dependent Claim
23 words
A liquid crystal device according to Claim 1, wherein an additional protection layer is disposed between the color filter layer and the electrode.
Claim 21
Dependent Claim
25 words
A liquid crystal device according to Claim 18, wherein said protection layer disposed on the electrode comprises a laminated structure including a plurality of layers.
Claim 22
Dependent Claim
102 words
In a liquid crystal device comprising a pair of substrates having scanning electrodes and signal electrodes, respectively, which are intersecting with each other, and a ferroelectric liquid crystal disposed between the pair of substrates, and adapted to line-sequential driving by sequentially applying a scanning selection signal to the scanning electrodes and applying an information signal to a selected signal electrode in phase with the scanning selection signal; the improvement wherein at least one of said pair of substrates having thereon a color filter layer and a protection layer for preventing direct contact between the color filter layer and the ferroelectric liquid crystal.
Claim 23
Dependent Claim
102 words
In a liquid crystal device comprising a pair of substrates having scanning electrodes and signal electrodes, respectively, which are intersecting with each other, and a ferroelectric liquid crystal disposed between the pair of substrates, and adapted to line-sequential driving by sequentially applying a scanning selection signal to the scanning electrodes and applying an information signal to a selected signal electrode in phase with the scanning selection signal; the improvement wherein at least one of said pair of substrates having thereon a color filter layer and a protection layer for preventing direct contact between the color filter layer and the ferroelectric liquid crystal.
Claim 24
Dependent Claim
22 words
A liquid crystal device according to Claim 21, wherein said color filter layer is disposed on the scanning electrodes or signal electrodes.
Claim 25
Dependent Claim
25 words
A liquid crystal device according to Claim 21, wherein said color filter layer is disposed between the substrate and the scanning electrodes or signal electrodes.
Claim 26
Dependent Claim
69 words
A liquid crystal device according to Claim 21, wherein said color filter layer is disposed between the substrate and the scanning electrodes or signal electrodes, said protection layer comprises a laminated structure including a plurality of protection layers, one of which is disposed between the color filter layer and the scanning electrodes or signal electrodes, and another one of which is disposed on the scanning electrodes or signal electrodes.
Claim 27
Dependent Claim
17 words
A liquid crystal device according to Claim 21, wherein said protection layer has a uniaxial orientation axis.
Claim 28
Dependent Claim
17 words
A liquid crystal device according to Claim 25, wherein said uniaxial orientation axis is a rubbing-treated axis.
Claim 29
Dependent Claim
19 words
A liquid crystal device according to Claim 21, wherein said ferroelectric liquid crystal is a chiral smectic liquid crystal.
Claim 30
Dependent Claim
31 words
A liquid crystal device according to Claim 27, wherein said ferroelectric liquid crystal is disposed in a layer thin enough to unwind the helical structure of the chiral smectic liquid crystal.
Claim 31
Dependent Claim
60 words
A liquid crystal device, comprising: a pair of substrates and a ferroelectric liquid crystal disposed between the pair of substrates; at least one of the pair of substrates having thereon a color filter layer and a protection layer for preventing direct contact between the color filter layer and the ferroelectric liquid crystal, and particulate spacers being disposed between the substrates.
Claim 32
Dependent Claim
60 words
A liquid crystal device, comprising: a pair of substrates and a ferroelectric liquid crystal disposed between the pair of substrates; at least one of the pair of substrates having thereon a color filter layer and a protection layer for preventing direct contact between the color filter layer and the ferroelectric liquid crystal, and particulate spacers being disposed between the substrates.
Claim 33
Dependent Claim
22 words
A liquid crystal device according to Claim 29, wherein said particulate spacers comprises alumina beads, glass beads, silica beads, or plastic beads.
Claim 34
Dependent Claim
19 words
A liquid crystal device according to Claim 29, wherein said ferroelectric liquid crystal is a chiral smectic liquid crystal.
Claim 35
Dependent Claim
31 words
A liquid crystal device according to Claim 31, wherein said ferroelectric liquid crystal is disposed in a layer thin enough to unwind the helical structure of the chiral smectic liquid crystal.
Claim 36
Dependent Claim
26 words
A liquid crystal device according to Claim 29, wherein said color filter layer was provided to each pixel so as to define a color pixel unit.
Claim 37
Dependent Claim
38 words
A liquid crystal device according to Claim 33, wherein said at least one substrate has three types of color pixel units including a blue color pixel unit, a green color pixel unit and a red color pixel unit.
Claim 38
Dependent Claim
17 words
A liquid crystal device according to Claim 29, wherein said protection layer has an alignment control effect.
Claim 39
Dependent Claim
18 words
A liquid crystal device according to Claim 29, wherein said protection layer also serves as an insulating film.
Claim 40
Dependent Claim
20 words
A liquid crystal device according to Claim 29, wherein said protection layer comprises a film of an inorganic insulating material.
Claim 41
Dependent Claim
51 words
A liquid crystal device according to Claim 37, wherein said organic insulating material comprises at least one member selected from the group consisting of polyvinyl alcohol, polyimide, polyamideimide, polyesterimide, polyparaxylylene, polyester, polycarbonate, polyvinyl acetal, polyvinyl chloride, polyvinyl acetate, polyamide, polystyrene, cellulose resin, melamine resin, urea resin, acrylic resin and photoresist resin.
Claim 42
Dependent Claim
25 words
A liquid crystal device according to Claim 29, wherein said color filter layer comprises colored polyimide, colored polyamide, colored polyamideimide, colored polyesterimide or colored polyester.
Claim 43
Dependent Claim
17 words
A liquid crystal device according to Claim 29, wherein said protection layer has a uniaxial orientation axis.
Claim 44
Dependent Claim
17 words
A liquid crystal device according to Claim 40, wherein said uniaxial orientation axis is a rubbing-treated axis.
Claim 45
Dependent Claim
20 words
A liquid crystal device according to Claim 40, wherein said uniaxial orientation axis has been provided by oblique vapor deposition.
Claim 46
Dependent Claim
40 words
A liquid crystal device according to Claim 29, wherein said protection layer comprises a film having a pencil hardness of HB or harder (as measured by a "pencil scratch tester for a coating film" defined according to JIS K 5401).
Claim 47
Dependent Claim
21 words
A liquid crystal device according to Claim 29, wherein said protection layer comprises a laminated structure including a plurality of layers.
Claim 48
Dependent Claim
40 words
A liquid crystal device according to Claim 29, wherein said laminated structure comprises a film having a pencil hardness of HB or harder (as measured by a "pencil scratch tester for a coating film" defined according to JIS K 5401).
References Cited (Backward Citations)
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