EP 1141172 A1 20011010 - LIQUID CRYSTAL MATERIALS
Title (en)
LIQUID CRYSTAL MATERIALS
Title (de)
FLÜSSIGKRISTALLMATERIALIEN
Title (fr)
MATERIAUX A CRISTAUX LIQUIDES
Publication
Application
Priority
- GB 9903820 W 19991117
- GB 9825124 A 19981117
- GB 9911032 A 19990513
Abstract (en)
[origin: WO0029505A1] A liquid crystal material comprises a smectic host component and one or both of (a) a chiral dopant; and (b) either a monomer comprising two polymerisable portions either end of an intermediate portion, or a polymer formed from said monomer. The smectic host component is closely matched in length to the said chiral dopant and/or to the intermediate component. Preferably it is also closely matched in polarisability to one or other of components (a) and (b). In preferred ferroelectric compositions, both the components (a) and (b) are present, the chiral component in an amount of between 5 and 30 weight per cent relative to smectic plus chiral components. These can exhibit improved resistance to mechanical shock in surface stabilised display devices, together with good switching speeds, while not unduly depressing the SC/SA transition temperature.
IPC 1-7
IPC 8 full level
G02F 1/13 (2006.01); C09K 19/02 (2006.01); C09K 19/12 (2006.01); C09K 19/38 (2006.01); C09K 19/54 (2006.01)
CPC (source: EP)
C09K 19/0225 (2013.01); C09K 19/0275 (2013.01); C09K 19/12 (2013.01); C09K 19/544 (2013.01); C09K 2019/0448 (2013.01); C09K 2019/123 (2013.01)
Citation (search report)
See references of WO 0029505A1
Designated contracting state (EPC)
DE FR GB NL
DOCDB simple family (publication)
WO 0029505 A1 20000525; EP 1141172 A1 20011010; JP 2003519244 A 20030617
DOCDB simple family (application)
GB 9903820 W 19991117; EP 99954274 A 19991117; JP 2000582494 A 19991117