Patent US2597346A successfully refreshed from Google Patents.
US6049366A
Expired / Lapsed
US
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Polymer stabilized liquid crystals and flexible devices thereof
Assignee: Sniaricerche SCpA
•
Filing: 1996-06-04
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Granted: 2000-04-11
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Expires: 2016-06-04
Abstract
Abstract The present invention is directed to a method for manufacturing polymer stabilized liquid crystals on large flexible films by lamination wherein the polymer stabilized liquid crystals contain microparticles or microspacers. Also, a method for manufacturing polymer stabilized liquid crystals on large flexible films by lamination of substrates having a replicated structure is provided. Polymer-free liquid crystals may also be used in some of the methods of the invention.
Inventors
- 👤 Hassan-Ali Hakemi
- 👤 Martino Caporusso
- 👤 Michele Santangelo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:08
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/52; C09K19/54; C09K19/542; C09K19/544; C09K19/04; C09K19/40; G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1339; G02F1/13394; G02F1/1341; C09K2019/546; G02F1/133305; G02F1/137; G02F1/13775
Claims Analysis
Total Claims: 50
Claim 1
Independent Claim
70 words
A method of making a flexible electrooptical liquid crystal device comprising: (a) placing a fluid liquid crystal composition comprising liquid crystal, a prepolymer, and microparticles between flexible conductive substrates; (b) laminating the substrates together; and (c) curing the fluid liquid crystal composition comprising the prepolymer to form a polymer stabilized liquid crystal, wherein the fluid liquid crystal composition prior to curing comprises 5 to 30 weight percent of the prepolymer.
Claim 2
Independent Claim
70 words
A method of making a flexible electrooptical liquid crystal device comprising: (a) placing a fluid liquid crystal composition comprising liquid crystal, a prepolymer, and microparticles between flexible conductive substrates; (b) laminating the substrates together; and (c) curing the fluid liquid crystal composition comprising the prepolymer to form a polymer stabilized liquid crystal, wherein the fluid liquid crystal composition prior to curing comprises 5 to 30 weight percent of the prepolymer.
Claim 3
Dependent Claim
18 words
The method of claim 1, wherein the microparticles have a particle size of from 5 to 50 microns.
Claim 4
Dependent Claim
18 words
The method of claim 1, wherein the curing of step (c) is by ultraviolet radiation or heat treatment.
Claim 5
Dependent Claim
12 words
The method of claim 1, wherein the microparticles are coated with adhesive.
Claim 6
Dependent Claim
19 words
The method of claim 1, wherein at least one of the flexible conductive substrates comprises a double-sided adhesive tape.
Claim 7
Dependent Claim
101 words
The method of claim 1, wherein the prepolymer comprises a UV curable compound selected from ##STR18## wherein M and M 1 is selected from Pt, Pd, Co, Au, or V; R is selected from C 1 -C 10 branched or unbranched alkyl groups; Y is halogen; X is selected from C 1 -C 4 alkyl; Ro is ##STR19## or OC m H 2m+1 , where m is 1 through 20; R 1 is selected from --(CH 2 ) 7 CH 3 ; --(CH 2 ) 3 OCH 2 CH 3 and R 2 is CH 2 ═CHCOO(CH 2 ) 6 O--.
Claim 8
Independent Claim
57 words
A method of making a flexible electrooptical liquid crystal device comprising: (a) placing a fluid liquid crystal composition comprising liquid crystal, a prepolymer, and microparticles between flexible conductive substrates; (b) laminating the substrates together; and (c) curing the fluid liquid crystal composition comprising the prepolymer to form a polymer stabilized liquid crystal, wherein the prepolymer is mesogenic.
Claim 9
Independent Claim
57 words
A method of making a flexible electrooptical liquid crystal device comprising: (a) placing a fluid liquid crystal composition comprising liquid crystal, a prepolymer, and microparticles between flexible conductive substrates; (b) laminating the substrates together; and (c) curing the fluid liquid crystal composition comprising the prepolymer to form a polymer stabilized liquid crystal, wherein the prepolymer is mesogenic.
Claim 10
Dependent Claim
18 words
The method of claim 7, wherein the microparticles have a particle size of from 5 to 50 microns.
Claim 11
Dependent Claim
18 words
The method of claim 7, wherein the curing of step (c) is by ultraviolet radiation or heat treatment.
Claim 12
Dependent Claim
12 words
The method of claim 7, wherein the microparticles are coated with adhesive.
Claim 13
Dependent Claim
19 words
The method of claim 7, wherein at least one of the flexible conductive substrates comprises a double-sided adhesive tape.
Claim 14
Dependent Claim
101 words
The method of claim 7, wherein the prepolymer comprises a UV curable compound selected from ##STR20## wherein M and M 1 is selected from Pt, Pd, Co, Au, or V; R is selected from C 1 -C 10 branched or unbranched alkyl groups; Y is halogen; X is selected from C 1 -C 4 alkyl; Ro is ##STR21## or OC m H 2m+1 , where m is 1 through 20; R 1 is selected from --(CH 2 ) 7 CH 3 ; --(CH 2 ) 3 OCH 2 CH 3 and R 2 is CH 2 ═CHCOO(CH 2 ) 6 O--.
Claim 15
Independent Claim
61 words
A method of making a flexible electrooptical liquid crystal device comprising: (a) placing a fluid liquid crystal composition comprising liquid crystal, a prepolymer, and microparticles between flexible conductive substrates; (b) laminating the substrates together; and (c) curing the fluid liquid crystal composition comprising the prepolymer to form a polymer stabilized liquid crystal, wherein the flexible conductive substrates comprise an adhesive layer.
Claim 16
Independent Claim
61 words
A method of making a flexible electrooptical liquid crystal device comprising: (a) placing a fluid liquid crystal composition comprising liquid crystal, a prepolymer, and microparticles between flexible conductive substrates; (b) laminating the substrates together; and (c) curing the fluid liquid crystal composition comprising the prepolymer to form a polymer stabilized liquid crystal, wherein the flexible conductive substrates comprise an adhesive layer.
Claim 17
Dependent Claim
18 words
The method of claim 13, wherein the microparticles have a particle size of from 5 to 50 microns.
Claim 18
Dependent Claim
18 words
The method of claim 13, wherein the curing of step (c) is by ultraviolet radiation or heat treatment.
Claim 19
Dependent Claim
12 words
The method of claim 15, wherein the microparticles are coated with adhesive.
Claim 20
Dependent Claim
19 words
The method of claim 13, wherein at least one of the flexible conductive substrates comprises a double-sided adhesive tape.
Claim 21
Dependent Claim
101 words
The method of claim 13, wherein the prepolymer comprises a UV curable compound selected from ##STR22## wherein M and M 1 is selected from Pt, Pd, Co, Au, or V; R is selected from C 1 -C 10 branched or unbranched alkyl groups; Y is halogen; X is selected from C 1 -C 4 alkyl; Ro is ##STR23## or OC m H 2m+1 , where m is 1 through 20; R 1 is selected from --(CH 2 ) 7 CH 3 ; --(CH 2 ) 3 OCH 2 CH 3 and R 2 is CH 2 ═CHCOO(CH 2 ) 6 O--.
Claim 22
Independent Claim
68 words
A method of making a flexible electrooptical liquid crystal device comprising: (a) placing a fluid liquid crystal composition comprising liquid crystal, a prepolymer, and microparticles between flexible conductive substrates; (b) laminating the substrates together; and (c) curing the fluid liquid crystal composition comprising the prepolymer to form a polymer stabilized liquid crystal, wherein the lamination in step (b) occurs at a temperature of from 20 to 100 C.
Claim 23
Independent Claim
68 words
A method of making a flexible electrooptical liquid crystal device comprising: (a) placing a fluid liquid crystal composition comprising liquid crystal, a prepolymer, and microparticles between flexible conductive substrates; (b) laminating the substrates together; and (c) curing the fluid liquid crystal composition comprising the prepolymer to form a polymer stabilized liquid crystal, wherein the lamination in step (b) occurs at a temperature of from 20 to 100 C.
Claim 24
Dependent Claim
18 words
The method of claim 19, wherein the microparticles have a particle size of from 5 to 50 microns.
Claim 25
Dependent Claim
18 words
The method of claim 19, wherein the curing of step (c) is by ultraviolet radiation or heat treatment.
Claim 26
Dependent Claim
12 words
The method of claim 19, wherein the microparticles are coated with adhesive.
Claim 27
Dependent Claim
19 words
The method of claim 19, wherein at least one of the flexible conductive substrates comprises a double-sided adhesive tape.
Claim 28
Dependent Claim
101 words
The method of claim 19, wherein the prepolymer comprises a UV curable compound selected from ##STR24## wherein M and M 1 is selected from Pt, Pd, Co, Au, or V; R is selected from C 1 -C 10 branched or unbranched alkyl groups; Y is halogen; X is selected from C 1 -C 4 alkyl; Ro is ##STR25## or OC m H 2m+1 , where m is 1 through 20; R 1 is selected from --(CH 2 ) 7 CH 3 ; --(CH 2 ) 3 OCH 2 CH 3 and R 2 is CH 2 ═CHCOO(CH 2 ) 6 O--.
Claim 29
Independent Claim
69 words
A method of making a flexible electrooptical liquid crystal device comprising: (a) placing a fluid liquid crystal composition comprising liquid crystal, a prepolymer, and microparticles between flexible conductive substrates; (b) laminating the substrates together; and (c) curing the fluid liquid crystal composition comprising the prepolymer to form a polymer stabilized liquid crystal, wherein the flexible conductive substrates are polymeric and have a thickness of from 50 to 200 microns.
Claim 30
Independent Claim
69 words
A method of making a flexible electrooptical liquid crystal device comprising: (a) placing a fluid liquid crystal composition comprising liquid crystal, a prepolymer, and microparticles between flexible conductive substrates; (b) laminating the substrates together; and (c) curing the fluid liquid crystal composition comprising the prepolymer to form a polymer stabilized liquid crystal, wherein the flexible conductive substrates are polymeric and have a thickness of from 50 to 200 microns.
Claim 31
Dependent Claim
18 words
The method of claim 25, wherein the microparticles have a particle size of from 5 to 50 microns.
Claim 32
Dependent Claim
18 words
The method of claim 25, wherein the curing of step (c) is by ultraviolet radiation or heat treatment.
Claim 33
Dependent Claim
12 words
The method of claim 25, wherein the microparticles are coated with adhesive.
Claim 34
Dependent Claim
19 words
The method of claim 25, wherein at least one of the flexible conductive substrates comprises a double-sided adhesive tape.
Claim 35
Dependent Claim
101 words
The method of claim 25, wherein the prepolymer comprises a UV curable compound selected from ##STR26## wherein M and M 1 is selected from Pt, Pd, Co, Au, or V; R is selected from C 1 -C 10 branched or unbranched alkyl groups; Y is halogen; X is selected from C 1 -C 4 alkyl; Ro is ##STR27## or OC m H 2m+1 , where m is 1 through 20; R 1 is selected from --(CH 2 ) 7 CH 3 ; --(CH 2 ) 3 OCH 2 CH 3 and R 2 is CH 2 ═CHCOO(CH 2 ) 6 O--.
Claim 36
Independent Claim
66 words
A method of making a flexible electrooptical liquid crystal device comprising: (a) placing a fluid liquid crystal composition comprising liquid crystal, a prepolymer, and microparticles between flexible conductive substrates; (b) laminating the substrates together; and (c) curing the fluid liquid crystal composition comprising the prepolymer to form a polymer stabilized liquid crystal, wherein the flexible conductive substrate is a polyethylene terephthalate film coated with indium-tin oxide.
Claim 37
Independent Claim
66 words
A method of making a flexible electrooptical liquid crystal device comprising: (a) placing a fluid liquid crystal composition comprising liquid crystal, a prepolymer, and microparticles between flexible conductive substrates; (b) laminating the substrates together; and (c) curing the fluid liquid crystal composition comprising the prepolymer to form a polymer stabilized liquid crystal, wherein the flexible conductive substrate is a polyethylene terephthalate film coated with indium-tin oxide.
Claim 38
Dependent Claim
18 words
The method of claim 31, wherein the microparticles have a particle size of from 5 to 50 microns.
Claim 39
Dependent Claim
18 words
The method of claim 31, wherein the curing of step (c) is by ultraviolet radiation or heat treatment.
Claim 40
Dependent Claim
12 words
The method of claim 31, wherein the microparticles are coated with adhesive.
Claim 41
Dependent Claim
19 words
The method of claim 31, wherein at least one of the flexible conductive substrates comprises a double-sided adhesive tape.
Claim 42
Dependent Claim
101 words
The method of claim 31, wherein the prepolymer comprises a UV curable compound selected from ##STR28## wherein M and M 1 is selected from Pt, Pd, Co, Au, or V; R is selected from C 1 -C 10 branched or unbranched alkyl groups; Y is halogen; X is selected from C 1 -C 4 alkyl; Ro is ##STR29## or OC m H 2m+1 , where m is 1 through 20; R 1 is selected from --(CH 2 ) 7 CH 3 ; --(CH 2 ) 3 OCH 2 CH 3 and R 2 is CH 2 ═CHCOO(CH 2 ) 6 O--.
Claim 43
Independent Claim
102 words
A method of making a flexible electrooptical liquid crystal device comprising: (a) placing a fluid liquid crystal composition comprising liquid crystal, a prepolymer, and microparticles between flexible conductive substrates; (b) laminating the substrates together; and (c) curing the fluid liquid crystal composition comprising the prepolymer to form a polymer stabilized liquid crystal, wherein the liquid crystal composition is cured by ultraviolet radiation in two steps, wherein the first step comprises placing a mask over the laminated substrates and selectively exposing the laminated substrates to ultraviolet radiation, and the second step comprises removing the mask and exposing the laminated substrates to ultraviolet radiation.
Claim 44
Independent Claim
102 words
A method of making a flexible electrooptical liquid crystal device comprising: (a) placing a fluid liquid crystal composition comprising liquid crystal, a prepolymer, and microparticles between flexible conductive substrates; (b) laminating the substrates together; and (c) curing the fluid liquid crystal composition comprising the prepolymer to form a polymer stabilized liquid crystal, wherein the liquid crystal composition is cured by ultraviolet radiation in two steps, wherein the first step comprises placing a mask over the laminated substrates and selectively exposing the laminated substrates to ultraviolet radiation, and the second step comprises removing the mask and exposing the laminated substrates to ultraviolet radiation.
Claim 45
Dependent Claim
25 words
The method of claim 37, wherein the ultraviolet radiation in the first step is of higher intensity than the ultraviolet radiation in the second step.
Claim 46
Dependent Claim
18 words
The method of claim 37, wherein the microparticles have a particle size of from 5 to 50 microns.
Claim 47
Dependent Claim
18 words
The method of claim 37, wherein the curing of step (c) is by ultraviolet radiation or heat treatment.
Claim 48
Dependent Claim
12 words
The method of claim 37, wherein the microparticles are coated with adhesive.
Claim 49
Dependent Claim
19 words
The method of claim 37, wherein at least one of the flexible conductive substrates comprises a double-sided adhesive tape.
Claim 50
Dependent Claim
101 words
The method of claim 37, wherein the prepolymer comprises a UV curable compound selected from ##STR30## wherein M and M 1 is selected from Pt, Pd, Co, Au, or V; R is selected from C 1 -C 10 branched or unbranched alkyl groups; Y is halogen; X is selected from C 1 -C 4 alkyl; Ro is ##STR31## or OC m H 2m+1 , where m is 1 through 20; R 1 is selected from --(CH 2 ) 7 CH 3 ; --(CH 2 ) 3 OCH 2 CH 3 and R 2 is CH 2 ═CHCOO(CH 2 ) 6 O--.
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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) | 2003-04-11 | 2003-10-11 | 2004-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-04-11 | 2007-10-11 | 2008-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-04-11 | 2011-10-11 | 2012-04-11 | $7700.00 | Window Closed / Lapsed |