Ube Industries, Inc.

Hataaki Yoshimoto

Katsuhiro Ito

Hiroshi Itatani

Mikito Kashima

Masaoki Matsuda

Akinori Shiotani

Hiroyuki Yamamoto

Takashi Honma

Ichiro Sasaki

Hiroshi Ichikawa

Yoshikazu Sasaki

Shuji Yamamoto

Yukio Matsumoto

Akiyoshi Yokota

Toshiya Koyama

Hiroyuki Mori

Tetuo Kato

Motozoh Yoshikiyo

An LCD device having an improved contrast, able to be operated by a matrix drive, and having a large display area, comprises a pair of transparent first and second bases; picture element electrodes arranged on the first base; signal lines arranged adjacent to the picture element electrode; non-linear elements consisting of varistor particle layers forming bridges between the picture element electrodes and the signal lines; scanning electrodes arranged on the second base; and a liquid crystal material layer located between the picture element electrodes and the scanning electrodes the liquid crystal material being dispersed in a polymeric matrix to form, for example, a NCAP system.

Liquid crystal display device

A liquid crystal emulsion composition usable for forming a polymer dispersed type liquid crystal membrane free from undesirable bubbles, by a printing method, comprises 100 parts by weight of a liquid crystal material, 10 to 100 parts by weight of a saponification product of a polyvinyl acetate resin, 1 to 30 parts by weight of an aliphatic alcohol having 3 to 8 carbon atoms and 50 to 1,000 parts by weight of water.

Liquid crystal emulsion composition

A liquid crystal display device capable of displaying clear images without cross-talk, comprises (a) a first transparent base, (b) a plurality of picture element electrodes on the first base (a), (c) a plurality of signal lines on the first base (a), (d) a plurality of varistor layers connecting the picture element electrodes (b) to the signal lines (c) therethrough, (e) a second transparent base in parallel to the first base (a), (f) a plurality of electrodes on the second base (e), and (g) a liquid crystal material layer arranged between the picture element electrodes (b) and the electrode (f), and is characterized in that portions of the varistor layer connecting the signal lines (c) and the adjacent picture element electrode (b) have a threshold value voltage (V.sub.th) smaller than a minimum voltage (V.sub.min) at which an electric current is allowed to flow from the signal lines (c) to the electrodes (f) through at least portions of the varistor layers extending from the signal lines (c) toward the electrodes (f).

Liquid crystal display device substantially free from cross-talk having

A liquid crystal display device capable of displaying clear images without cross-talk, includes (a) a first transparent base, (b) a plurality of picture element electrodes on the first base (a), (c) a plurality of signal lines on the first base (a), (d) a plurality of varistor layers connecting the picture element electrodes (b) to the signal lines (c) therethrough, (e) a second transparent base in parallel to the first base (a), (f) a plurality of scanning electrodes on the second base (e), and (g) a liquid crystal material layer arranged between the picture element electrodes (b) and the scanning electrodes (f), and is characterized in that the scanning electrodes (f) have a size, shape and location satisfying a relationship with the varistor layers (d) such that a plurality of vacant spaces are formed between the scanning electrodes (f) and the varistor layers (d) face the vacant spaces but not the scanning electrodes.

Liquid crystal display device having varistor elements

An LCD device having an improved contrast, able to be operated by a matrix drive, and having a large display area, comprises a pair of transparent first and second bases; picture element electrodes arranged on the first base; signal lines arranged adjacent to the picture element electrode; non-linear elements consisting of varistor particle layers forming bridges betweeen the picture element electrodes and the signal lines; scanning electrodes arranged on the second base; and a liquid crystal material layer located between the picture element electrodes and the scanning electrodes the liquid crystal material being dispersed in a polymeric matrix to form, for example, a NCAP system.

A liquid crystal display device, capable of displaying clear images without cross-talk, comprises (a) a first transparent base, (b) a plurality of picture element electrodes on the first base, (c) a plurality of signal lines on the first base, (d) a second transparent base in parallel to the first base, (e) a plurality of scanning electrodes on the second base, (f) a plurality of transit electrodes on the second base and (g) a liquid crystal material layer arranged between the picture element electrodes and the scanning electrodes. The transit electrode is connected to the corresponding picture element electrode and signal lines through two separate connecting layers, at least one of which layers comprises fine varistor particles, or through a single connecting layer comprising fine varistor particles.

Liquid crystal display device having varistor layers substantially free

A biphenyl compound is produced from a corresponding aromatic monocyclic compound at a high yield thereof and a high percent selectivity thereto, by dehydrogenatively dimerizing the aromatic monocyclic compound with molecular oxygen in the presence of oxalic acid together with a organic palladium salt catalyst, under a pressure higher than the atmospheric pressure.

Process for producing biphenyl compounds

An aromatic polyimide resin composition useful for producing a film or sheet, comprises 2% by weight or more of an imide polymer having at least 90 molar % of a recurring unit of the formula (I): ##STR1## wherein R' is a divalent aromatic radical, and dissolved in an organic polar solvent consisting essentially of one or more halogenated phenol compounds of the formulae (II) or (III): ##STR2## wherein R.sup.2 is a hydrogen atom of a C.sub.1-3 alkyl radical and is a halogen atom, the halogenated phenol compound having a melting point of 100.degree. C. or less and a boiling point of 300.degree. C. or less.

Aromatic polyimide resin composition

A process for separating and purifying biphenyltetracarboxylic dianhydride isomers from a mixture of these isomers by fractional crystallization in aliphatic acid anhydrides or acetone. The isomeric mixture is obtained by heating biphenyltetracarboxylic acids, optionally in the presence of an aliphatic acid anhydride. The biphenyltetracarboxylic acids are obtained by oxidizing coupling dimers of o-xylene or by hydrolyzing coupling dimers of dimethyl phthalate. 2,3,3',4'-biphenyltetracarboxylic acid dianhydride which can be isolated from the above mixture can be used to form polyimide.

2,3,3',4'-Biphenyltetracarboxylic acid dianhydride

A process for preparing substituted dibenzofuran or fluorenone-9 by the intramolecular cyclization of substituted diphenyl ether or benzophenone in the presence of a carboxylic acid salt of palladium and/or palladium organic complex.

Intramolecular cyclization in a fatty acid ester solvent

A process for separating and purifying biphenyltetracarboxylic dianhdride isomers from a mixture of these isomers by fractional crystallization in aliphatic acid anhydrides or acetone. The isomeric mixture is obtained by heating biphenyltetracarboxylic acids, optionally in the presence of an aliphatic acid anhydride. The biphenyltetracarboxylic acids are obtained by oxidizing coupling dimers of o-xylene or by hydrolyzing coupling dimers of dimethyl phthalate.

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Chiba, Japan

Hataaki Yoshimoto