Color liquid crystal display element

Abstract

Abstract PURPOSE:To obtain the titled element capable of forming a display of desired color, having superior light resistance, etc. and showing high color contrast between a state with voltage applied and a state with no voltage applied by dissolving plural kinds of dyes in a liq. crystal in a cell. CONSTITUTION:By dissolving plural kinds of dyes of dyes in a liq. crystal in a cell, a display of desired color can be formed. The used dyes are readily soluble in the liq. crystal and have superior light resistance, etc., and the molecules of the dyes orient well parallel to the oriented molecules of the liq. crystal. For example, in order to form a fresh red display, the dyes of formulae I, II and III are dissolved in a liq. crystal in a cell by 1-1.5wt%, 0.2-0.5wt% and 0.1-0.2wt% to the amount of the liq. crystal, respectively. In order to form a black display, the dyes of formulae IV, III and II are dissolved in a liq. crystal in a cell by 1.2-1.6wt%, 0.5- 1wt% and 0.5-1wt%, respectively. Thus, the desired color liq. crystal display element is obtd.

Inventors

• 👤 Yasuhiro Ukai
• 👤 Takeshi Imamura
• 👤 Takayuki Kida

Bibliographic Details