EP0296571A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Method of producing a liquid crystal optical element
Assignee: Idemitsu Kosan Co Ltd
•
Filing: 1988-06-22
•
Granted: —
•
Expires: 2008-06-22
Abstract
Abstract A liquid crystal optical element comprising: (a) an oriented ferroelectric liquid-crystalline polymer layer which exhibits chiral smectic C phase, and (b) two electrically conducting layers which support the oriented ferroelectric liquid-crystalline polymer layer between them, where at least one of the two electrically conducting layers is transparent. The liquid crystal optical element can be easily made into one having a large area and can be used as flexible display screen. Further, it has excellent electric field response property and high contrast. Furthermore, the production of the liquid crystal optical element and the control of its thickness can be easily conducted.
Inventors
- 👤 Kimihiro C/O Idemitsu Kosan Co. Ltd. Yuasa
- 👤 Kenji C/O Idemitsu Kosan Co. Ltd. Hashimoto
- 👤 Shunji C/O Idemitsu Kosan Co. Ltd. Uchida
- 👤 Kazuharu C/O Idemitsu Kosan Co. Ltd. Morita
- 👤 Satoshi C/O Idemitsu Kosan Co. Ltd. Hachiya
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 09:46
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/133365; C; C09; C09K; C09K19/00; C09K19/04; C09K19/38; C09K19/3833; C09K19/3842; C09K19/3852; C09K19/3857; C09K19/3866; G02F1/137; G02F1/139; G02F1/141
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
47 words
A liquid crystal optical element comprising: (a) an oriented ferroelectric liquid-crystalline polymer layer which exhibits chiral smectic C phase, and (b) two electrically conducting layers which support the oriented ferroelectric liquid-crystalline polymer layer between them, where at least one of the two electrically conducting layers is transparent.
Claim 2
Dependent Claim
47 words
A liquid crystal optical element comprising: (a) an oriented ferroelectric liquid-crystalline polymer layer which exhibits chiral smectic C phase, and (b) two electrically conducting layers which support the oriented ferroelectric liquid-crystalline polymer layer between them, where at least one of the two electrically conducting layers is transparent.
Claim 3
Dependent Claim
22 words
The liquid crystal optical element as claimed in claim 1 wherein the ferroelectric liquid-crystalline polymer layer is oriented by a coating method.
Claim 4
Dependent Claim
22 words
The liquid crystal optical element as claimed in claim 1 wherein the ferroelectric liquid-crystalline polymer layer is oriented by a stretching method.
Claim 5
Dependent Claim
68 words
A liquid crystal optical element comprising: (a) an oriented ferroelectric liquid-crystalline polymer layer which exhibits chiral smectic C phase, and (b) two substrates which support the oriented ferroelectric liquid-crystalline polymer layer between them and carry on their surfaces facing each other respective electrically conducting layers, where at least one of ` the` two substrates is transparent and the electrically conducting layer carried by the transparent substrate is transparent.
Claim 6
Dependent Claim
68 words
A liquid crystal optical element comprising: (a) an oriented ferroelectric liquid-crystalline polymer layer which exhibits chiral smectic C phase, and (b) two substrates which support the oriented ferroelectric liquid-crystalline polymer layer between them and carry on their surfaces facing each other respective electrically conducting layers, where at least one of ` the` two substrates is transparent and the electrically conducting layer carried by the transparent substrate is transparent.
Claim 7
Independent Claim
71 words
A method of producing a liquid crystal optical element comprising; (a) coating a ferroelectric liquid-crystalline polymer which exhibits chiral smectic C phase on an electrically conducting layer carried by a substrate to form a coated film of the ferroelectric liquid-crystalline polymer and orient the coated film by the coating operation, and (b) laminating an electrically conducting layer carried by a substrate on the coated film of the oriented ferroelectric liquid-crystalline polymer.
Claim 8
Independent Claim
71 words
A method of producing a liquid crystal optical element comprising; (a) coating a ferroelectric liquid-crystalline polymer which exhibits chiral smectic C phase on an electrically conducting layer carried by a substrate to form a coated film of the ferroelectric liquid-crystalline polymer and orient the coated film by the coating operation, and (b) laminating an electrically conducting layer carried by a substrate on the coated film of the oriented ferroelectric liquid-crystalline polymer.
Claim 9
Independent Claim
53 words
A method of producing a liquid crystal optical element comprising; (a) supporting a ferroelectric liquid-crystalline polymer which exhibits chiral smectic C phase between two flexible substrates carrying on their surfaces facing each other respective electrically conducting layers, and (b) orienting the ferroelectric liquid-crystalline polymer by stretching the lamination product obtained in step (a).
Claim 10
Independent Claim
53 words
A method of producing a liquid crystal optical element comprising; (a) supporting a ferroelectric liquid-crystalline polymer which exhibits chiral smectic C phase between two flexible substrates carrying on their surfaces facing each other respective electrically conducting layers, and (b) orienting the ferroelectric liquid-crystalline polymer by stretching the lamination product obtained in step (a).
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.