Sumitomo Electric Industries, Limited

Other

Dai Nippon Printing Co., Ltd.

Japan Science and Technology Agency

Asahi Kasei Kogyo Kabushiki Kaisha

Chisso Corporation

Tisato Kajiyama

Tohru Kashiwagi

Kensaku Takata

Hirotsugu Kikuchi

Kouji Hara

Kenji Kamada

Junichi Ono

Yoshiaki Hisakado

Satoshi Tanioka

Tadafumi Shindo

Yoshinori Kinase

Toshihiko Nagamura

Naoki Shimada

Wataru Saito

Atsushi Baba

Hidetoshi Ozawa

Jyunichi Ono

Yasuhiro Imamura

Yoshitaka Goto

Norihiro Kaiya

Motowo Takayanagi

Presents a liquid crystal display device that does not require a surface orientation treatment, dramatically improves the response rate of dynamic image displays and does not experience light leaks when the display is black, which means to yield a dark field of vision. The liquid crystal display device comprises polymer-stabilized blue phase liquid crystals sandwiched between a pair of clear substrates. The liquid crystal display device obtained using polymer-stabilized blue phase liquid crystals exhibits large double refraction changes when an electrical field is applied in an in-plane direction to the cell substrates. The polymer-stabilized blue phases liquid crystals comprises a low molecular weight liquid crystal that allows a blue phase to appear between cholesteric and isotropic phases and polymer network formed in the low molecular weight liquid crystals. Furthermore, a liquid crystal display device that does not leak light when the display is black (yields a dark field of vision) can be obtained by optimizing the type and amount of a chiral dopant added to the liquid crystals.

Liquid crystal display device

A record display medium is provided which can offer a high display contrast and is less likely to cause a lowering of contrast or disappearance of display even in low temperature and high temperature regions. A polymeric material for a liquid crystal/polymer composite film comprising a liquid crystal present in a polymer matrix, a liquid crystal/polymer composite film using the material, and use of the record display medium are also provided. The polymeric material for a liquid crystal/polymer composite film comprising a liquid crystal present in a polymer matrix has a glass transition temperature of 150.degree. C. or above and is insoluble in water.

Polymeric material for liquid crystal/polymer composite film, record

An optical element which comprises a liquid crystal dispersion film layer which is composed of a spongy matrix polymer and a liquid crystal such that they become separated at use temperatures and mixed at high temperatures. The mixture remains mixed upon quenching but gets phase separated upon slow cooling. The optical element produces an electro-optic effect and permits heat-mode recording.

Optical element

A liquid crystal display device which has a pair of transparent electrodes and a composite film having continuous pores of a polymer matrix filled with a liquid crystal material has high contrast and good heat resistance. The polymer matrix is made of

Liquid crystal display device and preparation thereof

Liquid crystal display device and preparation and use thereof

A method of driving a matrix-type liquid crystal display device utilizing a liquid crystal layer sandwiched between a plurality of scanning electrodes and a plurality of signal electrodes extending generally perpendicular to the scanning electrodes, which comprises the steps of erasing a display screen by bringing it into either a light transmitting state or a light scattering state, writing by which pixels each at a point of intersection between the scanning and signal electrodes are selectively reversed in optical state, and retaining each of the pixels in the optical state once assumed immediately after the writing step. During the erasing step, all of the pixels are applied with a high alternating voltage or a high direct current voltage. During the writing step, the scanning electrodes are line-sequentially selected and the signal electrodes are applied with a signal of a waveform effective to apply a high voltage to some of the pixels desired to be reversed in optical state and a low voltage to some of the pixels desired to be retained. During the retaining step, a low alternating voltage or a low direct current voltage is applied to all of the pixels. One of the voltage wave applied to the pixels during the writing step and that applied thereto during the erasing step is high and low, respectively.

Method of driving a matrix-type liquid crystal display device

A polymer composite material which comprises a first rigid polymeric material composed substantially of rigid molecular chains having an average chain length of 50 A or more, and a second polymeric material composed substantially of flexible molecular chains, wherein said first rigid polymeric material is present in an amount of 20% or less based on the total weight of polymeric material in said composite and said first material is uniformly dispersed in said second polymeric material in a microscopic region of 1 .mu.m or less.

Polymer composite material

Growing community of inventors

Fukuoka, Japan

Tisato Kajiyama