Patent EP0404575A2 successfully refreshed from Google Patents.
EP0404575A2
Expired / Lapsed
EP
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Recording medium
Assignee: Victor Company of Japan Ltd
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Filing: 1990-06-21
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Granted: —
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Expires: 2010-06-21
Abstract
Abstract There is provided an information memory medium comprising a memory layer composed of liquid crystal having molecules and a polymer member having minute pores in which the liquid crystal is contained causing the liquid crystal having a threshold potential thereby the molecules of the liquid crystal respond to be oriented only when an applied electric field is over the threshold potential, and the molecules thus oriented are maintained after the applied electric field is removed.
Inventors
- 👤 Toshio 502 Taguchi Biruto Konno
- 👤 Tadayuki Shimada
- 👤 Atsushi Nakano
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 15:58
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/024
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
72 words
An information memory medium, comprising: a memory layer composed of liquid crystal having molecules and a polymer member having minute pores in which the liquid crystal is contained causing the liquid crystal having a threshold potential thereby said molecules of the liquid crystal respond to be oriented only when an applied electric field is over the threshold potential, and said molecules thus oriented are maintained after the applied electric field is removed.
Claim 2
Dependent Claim
72 words
An information memory medium, comprising: a memory layer composed of liquid crystal having molecules and a polymer member having minute pores in which the liquid crystal is contained causing the liquid crystal having a threshold potential thereby said molecules of the liquid crystal respond to be oriented only when an applied electric field is over the threshold potential, and said molecules thus oriented are maintained after the applied electric field is removed.
Claim 3
Dependent Claim
22 words
An information memory medium according to claim 1 wherein the liquid crystal has lower melting point than that of the polymer member.
Claim 4
Dependent Claim
20 words
An information memory medium according to claim 1 wherein the polymer member has volume resistivity of 10¹⁴ Ωcm or more.
Claim 5
Dependent Claim
18 words
An information memory medium according to claim 1 wherein the liquid crystal is smectic at a room temperature.
Claim 6
Dependent Claim
22 words
An information memory medium according to claim 4 wherein the liquid crystal has lower melting point than that of the polymer member.
Claim 7
Dependent Claim
29 words
An information memory medium according to claim 1 wherein the liquid crystal is a mixture of liquid crystals which behave smectic and nematic phases respectively at a room temperature.
Claim 8
Dependent Claim
22 words
An information memory medium according to claim 6 wherein the liquid crystal has lower melting point than that of the polymer member.
Claim 9
Dependent Claim
27 words
An information memory medium according to claim 2, wherein said liquid crystal is in isotropic phase by being heated below said melting point of the polymer member.
Claim 10
Dependent Claim
26 words
An information memory medium according to claim 1, wherein an electrode in a form of plane is laminated to only one side of said memory layer.
Claim 11
Dependent Claim
23 words
An information memory medium according to claim 9, wherein said electrode is sandwiched between said memory layer and a substrate supporting said electrode.
Claim 12
Dependent Claim
13 words
An information memory medium according to claim 10, wherein said substrate is transparent.
Claim 13
Dependent Claim
24 words
An information memory medium according to claim 1, wherein a photoconductive layer is further contacted directly to said memory layer for recording optical information.
Claim 14
Dependent Claim
29 words
An information memory medium according to claim 1, wherein said memory layer is coated with a dielectric layer and a photoconductive layer being contacted thereto for recording optical information.
References Cited (Backward Citations)
No citation records indexed.
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