EP0069387A2
Expired / Lapsed
EP
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Liquid crystal display device
Assignee: Hitachi Ltd
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Filing: 1982-07-06
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Granted: —
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Expires: 2002-07-06
Abstract
Abstract In a liquid crystal display device produced by forming an orientation controlling film on each surface of upper and lower substrates having an electrode, placing a liquid crystal composition between said substrates, and then sealing the periphery of the substrate, the response times, particularly those at low temperatures can be reduced by using, as the aforesaid liquid crystal composition, a liquid crystal composition which is obtained by adding a material having a glass transition temperature (T g ) of -90°C or lower to a liquid crystal material base and has a To of -82°C or lower.
Inventors
- 👤 Hidetoshi Abe
- 👤 Akio Mukoh
- 👤 Teruo Kitamura
- 👤 Norimasa Kamezawa
- 👤 Yasuo Hanawa
- 👤 Mikio Sato
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 18:08
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/52; C09K19/58
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
88 words
A liquid crystal display device comprising upper and lower substrates each having an electrode and an orientation controlling film formed on the surface of said substrate, a layer of a liquid crystal composition interposed between said substrates, and a sealing means disposed at the periphery of said substrates, the improvement wherein the aforesaid liquid crystal composition contains a liquid crystal material base and an additive of an organic compound having a glass transition temperature (T ) of -90°C or lower and has a T of -82°C or lower.
Claim 2
Dependent Claim
88 words
A liquid crystal display device comprising upper and lower substrates each having an electrode and an orientation controlling film formed on the surface of said substrate, a layer of a liquid crystal composition interposed between said substrates, and a sealing means disposed at the periphery of said substrates, the improvement wherein the aforesaid liquid crystal composition contains a liquid crystal material base and an additive of an organic compound having a glass transition temperature (T ) of -90°C or lower and has a T of -82°C or lower.
Claim 3
Dependent Claim
20 words
A device according to claim 1, wherein the aforesaid liquid crystal composition has a T g of -90°C or lower.
Claim 4
Dependent Claim
24 words
A device according to claim 1 or 2, wherein the organic compound having a T g of -90°C or lower is liquid crystalline substance.
Claim 5
Dependent Claim
25 words
A device according to claim 1 or 2, wherein the organic compound having a T g of -90°C or lower is a non-liquid crystalline substance.
Claim 6
Dependent Claim
30 words
A device according to claim 4, wherein the amount of the aforesaid non-liquid cyrstalline substance to be added to the liquid crystal material base is 5 to 20% by weight.
Claim 7
Dependent Claim
36 words
A device according to claim 3, wherein the aforesaid liquid crystalline substance to be added to the liquid crystal material base is selected from the group consisting of 4-butoxy-benzylidene-4'-butylaniline, 4-hexyloxy-benzylidene-4'-butylaniline, trans-4-methyl-4'-(propoxymethylenephenyl)cyclohexane, trans-4-pentyl-4'-(butoxymethylenephenyl)cyclohexane, trans-4-pentyl-4'-(pentoxymethylenephenyl)cyclohexane, 4-pentyl-4'-(trans-propoxymethylenecyclohexane)benzene and trans-4-pentyl-4'-(methoxymethylenephenyl)cyclohexane.
Claim 8
Dependent Claim
30 words
A device according to claim 7, wherein the amount of the aforesaid liquid crystalline substance to be added to the liquid crystal material base is 10 to 50% by weight.
Claim 9
Dependent Claim
48 words
A device according to claim 4 or 6, wherein the aforesaid non-liquid crystalline substance to be added to the liquid crystal material base is selected from the group consisting of propene, carbon tetrachloride, isopentane, 2,3-dimethylbutane, chloroform, ethyl alcohol, cyclohexene, dichloromethane, methyl alcohol, ethylbenzene, vinyl alcohol, isopropylbenzene and cyclohexanol.
Claim 10
Independent Claim
38 words
A device according to any of claims 3 to 8, wherein the T of the organic compound having a T g of -90°C or lower to be added to the liquid crystal material base is -90°C to -150°C.
Claim 11
Dependent Claim
67 words
A liquid crystal display device comprising upper and lower substrates each having an electrode and an orientation controlling film formed on the surface of said substrate, a layer of liquid crystal composition interposed between said substrates, and a sealing means disposed at the periphery of said substrates, the improvement wherein the aforesaid liquid crystal composition is a liquid crystal composition having a T of -90°C or lower.
Claim 12
Dependent Claim
67 words
A liquid crystal display device comprising upper and lower substrates each having an electrode and an orientation controlling film formed on the surface of said substrate, a layer of liquid crystal composition interposed between said substrates, and a sealing means disposed at the periphery of said substrates, the improvement wherein the aforesaid liquid crystal composition is a liquid crystal composition having a T of -90°C or lower.
Claim 13
Dependent Claim
43 words
ll. A device according to claim 10, wherein the aforesaid liquid crystal composition is prepared by adding as the organic compound a liquid crystalline substance and/or a non-liquid crystalline substance having a T of -90°C or lower to the liquid crystal mateiral base.
Claim 14
Dependent Claim
30 words
A device according to claim 11, wherein the amount of the aforesaid non-liquid crystalline substance to be added to the liquid crystal material base is 5 to 20% by weight.
Claim 15
Dependent Claim
36 words
A device according to claim 11, wherein the aforesaid liquid crystalline substance to be added to the liquid crystal material base is selected from the group consisting of 4-butoxy-benzylidene-4'-butylaniline, 4-hexyloxy-benzylidene-4'-butylaniline, trans-4-methyl-4'-(propxymethylenephenyl)cyclohexane, trans-4-pentyl-4'-(butoxymethylenephenyl)cyclohexane, trans-4-pentyl-4'-(pentoxymethylenephenyl)cyclohexane, 4-pentyl-4'-(trans-propoxymethylenecyclohexane)benzene and trans-4-pentyl-4'-(methoxymethylenephenyl)cyclohexane.
Claim 16
Dependent Claim
37 words
A device according to claim 13, wherein the amount of the liquid crystalline substance having a T g of -90°C or lower to be added to the liquid crystal material base is 10 to 50% by weight.
Claim 17
Dependent Claim
47 words
A device according to claim 11 or 12, wherein the aforesaid non-liquid-crystalline substance to be added to the liquid crystal material base is selected from the group consisting of propene, carbon tetrachloride, isopentane, 2,3-dimethylbutane, chloroform, ethyl alcohol, cyclohexane, dichloromethane, methyl alcohol, ethylbenzene, vinyl alcohol, isopropylbenzene and cyclohexanol.
Claim 18
Independent Claim
38 words
A device according to any of claims 11 to 15, wherein the T of the organic compound having a T g of -90°C or lower to be added to the liquid crystal material base is -90°C to 150°C.
Claim 19
Dependent Claim
94 words
A liquid crystal display device comprising upper and lower substrates each having an electrode and an orientation controlling film formed on the surface of said substrate, a layer of a liquid crystal composition interposed between said substrates, and a sealing means disposed at the periphery of said substrates, the improvement wherein the aforesaid liquid crystal composition contains a liquid crystal material base and an additive of an organic compound having a glass transition temperature (T ) of -90°C or lower and has a response time (t ) at -30°C of 1.0 second or less.
Claim 20
Dependent Claim
94 words
A liquid crystal display device comprising upper and lower substrates each having an electrode and an orientation controlling film formed on the surface of said substrate, a layer of a liquid crystal composition interposed between said substrates, and a sealing means disposed at the periphery of said substrates, the improvement wherein the aforesaid liquid crystal composition contains a liquid crystal material base and an additive of an organic compound having a glass transition temperature (T ) of -90°C or lower and has a response time (t ) at -30°C of 1.0 second or less.
References Cited (Backward Citations)
No citation records indexed.
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