Matsushita Electric Industrial Co., Ltd.

Kazuhiro Johten

Tsuyoshi Uemura

Hiroyuki Onishi

Naohide Wakita

Shozo Fujiwara

Tadahiko Yokota

Hideaki Mochizuki

Naoko Mikami

Yoshio Iwai

Takao Sakurai

Hiroshi Satani

Hiroyuki Ohnishi

Satoshi Kimura

Characteristics of a ferroelectric liquid crystal show that ionic impurities deteriorate its display quality to a great extent. The present invention provides a ferroelectric liquid crystal display device of good display quality without the deterioration of display characteristics, as a result of trapping the ionic impurities effectively by adding an organic material which traps ions and which lowers conductivity of a liquid crystal layer thereto.

Ferroelectric liquid crystal composition and ferroelectric liquid

A liquid crystal display device and its driving method of the present invention have a voltage application scheme to control a stable condition of a gap between pixels, by applying a voltage to a liquid crystal panel in which ferroelectric liquid crystal is sandwiched between substrates each having a plurality of electrodes. It is possible to implement the black matrix conditions with a simple configuration without a light shielding layer by controlling the stable condition of the gap, to display a grey tone with a combination of pixels and a gap, or to raise the opening ratio by making the condition between adjacent pixels and a gap the same condition.

Pixel-gap controlled ferroelectric liquid crystal display device and its

This invention prevents a time-course deterioration of characteristics of a liquid crystal panel and dramatically increases the life of the panel by using a ferroelectric liquid crystal composition in which a proper amount of aliphatic amine or epoxy compound is added to a ferroelectric liquid crystal material.

Ferroelectric liquid crystal composition and liquid crystal display

Growing community of inventors

Hirakata, Japan

Kazuhiro Johten