US4892392A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Picture display cell and method of forming an orientation layer on a substrate of the picture display cell
Assignee: US Philips Corp
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Filing: 1988-11-02
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Granted: 1990-01-09
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Expires: 2008-11-02
Abstract
Abstract Picture display cell, method of forming an orientation layer on a substrate of the picture display cell and monomeric compounds for use in the orientation layer. The picture display cell comprising two transparent plates having an electrode with thereon an orientation layer and a sealing ring between the ends of the plates, a liquid crystalline material being present in the space between the plates and the ring, the orientation layer being formed from a monomer or a low molecular compound which is first oriented in a field.
Inventors
- 👤 Dirk J. Broer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:26
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/027; C; C09; C09K; C09K19/00; C09K19/04; C09K19/38; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1337; G02F1/133711; G02F1/133719; G03F7/0005; G03F7/001; C09K2323/00; G02F1/133726
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
101 words
A picture display cell comprising as a substrate two oppositely located plates which are transparent to light and which on the facing sides comprise an electrode of a material which is transparent to light having thereon an orientation layer and a sealing ring between the ends of the plate, a liquid crystalline material being provided in the space between the plates and the ring, characterized in that the orientation layer is formed from a monomer or a low molecular weight compound which is first oriented at a given angle essentially only in an electric or magnetic field and is then polymerized.
Claim 2
Dependent Claim
101 words
A picture display cell comprising as a substrate two oppositely located plates which are transparent to light and which on the facing sides comprise an electrode of a material which is transparent to light having thereon an orientation layer and a sealing ring between the ends of the plate, a liquid crystalline material being provided in the space between the plates and the ring, characterized in that the orientation layer is formed from a monomer or a low molecular weight compound which is first oriented at a given angle essentially only in an electric or magnetic field and is then polymerized.
Claim 3
Dependent Claim
31 words
A picture display cell as claimed in claim 1, characterized in that the orientation layer is built up from a polymer obtained by the polymerization of oriented liquid crystalline (meth)acrylate monomers.
Claim 4
Dependent Claim
63 words
A picture display cell as claimed in claims 1 or 2, characterized in that the monomers are acrylate monomers which correspond to formula 1, 2 or 3 of the formula sheet, wherein--A--is a bivalent radical, --B--is a mesogenic group, R is hydrogen atom or a methyl group and R 2 is an alkyl group, an aromatic group, a cyano group or combinations thereof.
Claim 5
Dependent Claim
26 words
A picture display cell as claimed in claim 3, characterized in that the acrylate monomers correspond to formula 4, 5 or 6 of the formula sheet.
Claim 6
Dependent Claim
30 words
A picture display cell as claimed in claims 1 or 2, characterized in that the orientation layer is formed from a mixture of two or more monomers which are polymerized.
Claim 7
Independent Claim
52 words
A method of forming an orientation layer on a substrate for a picture display cell comprising an electrode, characterized in that a film of a liquid crystalline monomer is provided in the substrate, the monomer is oriented essentially in a magnetic or electric field at a given angle, and is then polymerized.
Claim 8
Independent Claim
52 words
A method of forming an orientation layer on a substrate for a picture display cell comprising an electrode, characterized in that a film of a liquid crystalline monomer is provided in the substrate, the monomer is oriented essentially in a magnetic or electric field at a given angle, and is then polymerized.
Claim 9
Dependent Claim
20 words
A method as claimed in claim 6, characterized in that the polymerization is carried out by exposure to actinic light.
Claim 10
Independent Claim
32 words
A method as claimed in claims 6 or 7, characterized in that a photo initiator is added to a monomer in a quantity smaller than 10% by weight calculated on the monomer.
Claim 11
Dependent Claim
20 words
A method as claimed in claim 6 or 7, characterized in that monomers are used as stated in claim 6.
Claim 12
Dependent Claim
26 words
A method as claimed in claim 6 or 7, characterized in that a bonding layer is formed on the substrate before the monomeric film is provided.
Claim 13
Dependent Claim
27 words
A method as claimed in claim 8, characterized in that the photoinitiator is bonded to the surface of the substrate and is not mixed in the monomer.
Claim 14
Dependent Claim
46 words
A method as claimed in claim 11, characterized in that the substrate is provided with a bonding agent, then with a photoinitiator, after which a monomeric film is provided and after orientation the polymerization of the monomeric film is carried out under the influence of UV-rays.
References Cited (Backward Citations)
US3989354A
Cited
US4038441A
Cited
US4022934A
Cited
US4293435A
Cited
US4615962A
Cited
US4561725A
Cited
US4639089A
Cited
US4647978A
Cited
US4725517A
Cited
US4707086A
Cited
US4643528A
Cited
US4683327A
Cited
US4735492A
Cited
US4799772A
Cited
GB2185487A
Cited
US4820026A
Cited
US4749777A
Cited
US4767191A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-01-08 | 1993-07-10 | 1994-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-01-08 | 1997-07-10 | 1998-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-01-08 | 2001-07-10 | 2002-01-09 | $7700.00 | Window Closed / Lapsed |