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US 5,397,503 AGranted
Liquid crystal composition and information display apparatus using the liquid crystal composition
AssigneeIdemitsu Kosan Co., Ltd.
InventorsKimihiro Yuasa, Motohisa Ido, Ryusuke Watanabe
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Abstract
A liquid crystal composition comprising 5 to 99 % by weight of a liquid-crystalline copolymer, which has both an alkyl chain and a siloxane chain in its main chain, and 1 to 95 % by weight of a low molecular weight liquid-crystalline compound operates at a wide range of temperatures including room temperature, has an excellent film formability, is easy to orient to a high degree by mechanical orientation methods including bending orientation method and responds to the change of electric field at a high speed.
Claims17
An information display apparatus, comprising:
- (a) a liquid crystal display device for displaying a display substance which comprising a liquid crystal composition comprising a liquid crystal copolymer selected from the group consisting of
- (1) a liquid-crystalline copolymer comprising a repeating unit represented by the following formula (I) ##STR86## wherein each of a, and b is an integer of 2 to 5, d is an integer of 0 to 3, e is an integer of 1 to 20, and R.sup.1 is ##STR87## R.sup.2 is --COOR.sup.3, --OR.sup.3 or --OCOR, R.sup.3 is ##STR88## * indicating an asymmetric carbon atom, each of R.sup.4 and R.sup.5 being a methyl group or a halogen atom, f being an integer of 0 to 10, g being an integer of 0 or 1 and h being an integer of 1 to 11, with the proviso that when R.sup.5 is a methyl group, h is not an integer of 1, and
- (2) a liquid-crystalline copolymer comprising a repeating unit represented by the following formula (II) and a repeating unit represented by the following formula (III) ##STR89## wherein *, a, b, d and e are as defined above, j is an integer of 0 to 3, k is an integer of 2 to 7, R.sup.6 is an optically active group represented by the following formula (IV) or an optically inert group represented by the following formula (V) ##STR90## * being as defined above, m being an integer of 0 to 3, and n being an integer of 2 to 7,
- the repeating unit (II) and the repeating unit (III) being present in the liquid-crystalline copolymer (2) in a molar ratio (II)/(III) of 1/99 to 99/1;
- and a low molecular weight liquid-crystalline compound, the liquid crystal composition containing 5 to 99% by weight of the liquid-crystalline copolymer based on the total of the liquid-crystalline copolymer and the low molecular weight liquid-crystalline compound and two flexible substrates sandwiching the liquid crystal composition between them and bearing on their surfaces facing each other respective electrodes,
- (b) a receiving member for receiving a substance to be displayed, through a radio signal from outside of the information display apparatus,
- (c) a driving circuit for driving the liquid crystal display device according to a signal from the receiving member, and
- (d) a power supply member for supplying electric force to the driving circuit.
5 more elements
Dependencies are inferred from the claim text.