Alps Electric Co., Ltd.

Jun Nakanowatari

Mitsuru Kano

Moritoshi Nakamura

Kenichi Mitsumori

Makoto Tomoyori

Yoshinori Kato

Yorihiko Sasaki

Hitoshi Seki

Yoshimi Kamijyo

Masahiko Yamaguchi

Masami Ikarashi

Kazuya Okabe

Tetsuhiro Kiyono

Hideyuki Matsuda

Yasuhiro Miki

Tomoo Kamigaki

Kazuyoshi Sasaki

Takemi Akimoto

Mitsuo Machida

Toshiyuki Okamoto

Yoshihiro Nakura

A ferroelectric liquid crystal device includes a pair of substrates which has electrodes formed in an opposing spatial relation to each other. At least one of the electrodes is optically transparent. A parallel aligned, obliquely evaporated film is formed on each electrode. The paired substrates are sealed to provide a cell. A ferroelectric liquid crystal composition to which an ionic substance having a great mobility is added is placed in the cell to obtain the liquid crystal device. The addition of the ionic substance results in a low switching threshold voltage, a high response speed and good memory reproducibility. When the device is applied with an AC electric field prior to driving, display contrast is significantly improved.

Ferroelectric liquid crystal device

A electroluminescence device has a light emitting layer composed of a fluorescent powder and a liquid crystal between a transparent substrate formed with a transparent electrode and an insulating substrate formed with an opposed electrode.

Electroluminescent device having a liquid crystal layer adjacent to the

The present invention relates to a method and a device for displaying letters, images, etc. as well as a displaying medium used therefor, by which a display medium obtained by superposing a photoconductive layer, in which microcapsules are dispersed on a substrate. The microcapsules enclose a liquid crystal material which transitions between a transparent state and an opaque state by the application of an electric field. The substrate has a conductive surface so that charging of the surface causes the microcapsules to become transparent. An electrostatic latent image is formed on the surface of the displaying medium by irradiating selectively the surface with light. An AC electric field is applied to the displaying medium in order to make the microcapsules opaque at the position corresponding to the place, where the electric field is made disappear thereby making the latent image visible.

Display method, device for realizing same and displaying medium used

A ferroelectric liquid crystal device, in which orientation is applied for either one of both or two substrates having transparent electrodes formed thereon for arranging the liquid crystal molecules in parallel with the substrate and a ferroelectric crystal is filled into the gap between two sheets of the substrates, wherein the ferroelectric liquid crystal has a helical texture pitch in the smectic phase not less than 1 um and not greater than 3.5 micrometers, while having a pitch in the cholesteric phase of not less than 25 micrometers. Also, the length of the gap between the substrates ranges from 6 to 13 micrometers. The light scattering type liquid crystal device capable of storing the state of display and displaying a large picture area at high contrast can be obtained.

Ferroelectric liquid crystal device with specific pitch in each of a

A liquid crystal device includes a pair of first and second opposed substrates, a ferroelectric liquid crystal filled in a space defined between both the substrates, and a thin film transistor formed on at least one of the substrates. The thin film transistor is used as a spacer between the substrates, and the spacer is bonded to the first substrate opposed to the second substrate on which the spacer is formed. In another aspect, a dummy corresponding to the thin film transistor is further provided on the substrate on which the thin film transistor is formed, wherein the dummy is used as a spacer.

Liquid crystal device having 'dummy' thin-film transistors as spacers

A pair of substrates are opposed to each other and the peripheral portions thereof are sealed by a sealing member. A part of the sealing member is opened so as to constitute a liquid crystal injection hole. A groove for introducing a liquid crystal is provided on the inner surface of at least one of the substrates in such a manner as to lead from the injection hole to the inner surface of the cell.

Liquid crystal cell

A liquid crystalline compound represented by the following general formula: ##STR1## where m and l represent individually integers within a range: 6.ltoreq.m.ltoreq.14 and 1.ltoreq.l.ltoreq.5, the symbol * represents an asymmetric carbon atom and the compound is required to be optically active. The compound can induce the twisting arrangement when added to the TN system or phase transition type liquid crystal mixture, as well as can improve the spontaneous polarization as the index of the ferroelectric property when added to the SmC* liquid crystal mixture.

Liquid crystalline compound

Disclosed is a liquid crystal element using a film transistor as a switching element, the liquid crystal element comprising two substrates opposed to each other, film transistors and spacers disposed on the opposed surface of one of the substrates, a transparent electrode formed on the opposed surface of the other substrate, a metal wiring formed simultaneously with a light shield of a film transistor or an upper metal layer of the spacer, the metal wiring having one end disposed between the film transistor or spacer and the transparent electrode whereas the other end thereof extends to the peripheral edge of the one substrate.

Liquid crystal element having conductive wiring part extending from top

There is provided a chiral compound of the formula ##STR1## where m, 1, and k are integers in the range of 4.ltoreq.m.ltoreq.14, 0.ltoreq.l.ltoreq.7, 0.ltoreq.k.ltoreq.8, respectively, which has the property of being a liquid crystal in itself or can be added to a liquid crystal without any adverse effect on the liquid crystal. The compound induces twisted arrangement when added to a liquid crystal of TN mode or phase change mode, and it increases the spontaneous polarization when added to a SmC* liquid crystal.

Liquid crystal compound

In a liquid crystal display apparatus employing a ferroelectric liquid crystal cell, two or more pulse voltages are applied to the liquid crystal cell during selected time periods within 1 frame period to drive the liquid crystal cell. These pulse voltages can maintain the display condition of the liquid crystal cell.

Method of driving a liquid crystal display apparatus employing a

A liquid crystal light valve has two base plates of glass and transparent electrodes formed thereon with a ferroelectric liquid crystal interposed between the electrodes, wherein one of the electrodes has a film of insulative material oriented in a specific direction through rubbing treatment, and the other electrode has a film of insulative material treated with a coupler material for horizontal orientation but not oriented in a specific direction.

Liquid crystal light valve

A liquid crystal device comprising a liquid crystal cell in which a ferroelectric liquid crystal are put between two sheets transparent substrates each formed with a transparent electrode to the inside thereof with the peripheral edges of the transparent substrates being sealed, a polymer film having a birefringent property appended on one side of the liquid crystal cell and two polarizing plates disposed on both sides of the liquid crystal cell and such that the polarizing directions thereof are in perpendicular to or in parallel with each other. Coloring for the transmission light is suppressed, by which the display quality can be improved.

Liquid crystal device having birefringent plate next to polarizer

Liquid crystalline pyrimidinyl phenyl carboxylic acid ester derivatives

A flexible printed circuit board has one end to be soldered to the terminal section of a display device, such as a liquid crystal display, the terminal section being used for connection to an external circuit. The end of the circuit board is provided with a pair of protrusions on opposite sides. The display device has a small base sheet and a large base sheet bonded together to form a cell. When the protrusions are caused to bear on the side of the cell, a given gap is formed between the portion of the aforementioned end other than the protrusions and the small base sheet of the display device.

Flexible printed circuit board for a display device

Disclosed is a liquid crystal display device in which a twisted nematic type liquid crystal display element is used as a light shutter and combined with color polarizer plates to provide color display, characterized in that a nematic crystal added with a black coloring matter is used and in that at least one of the polarizer plates has a degree of polarization of about 80% or less. Preferably, the rate of addition of the black coloring matter is limited to about 1.5% or less.

Growing community of inventors

Miyagi, Japan

Jun Nakanowatari