Color liquid crystal composition

Abstract

Abstract PURPOSE:To provide the titled composition stable to light, having high coloring property, exhibiting high dichroism and excellent contrast, and giving a yellow color display device having high performance, by adding a quinophthalone dye of a specific formula to a liquid crystal. CONSTITUTION:The objective composition is prepared by incorporating a liquid crystal with preferably 0.01-5wt% of a quinophthalone dye of formula I {R is halogen, OH, (nitrile-substituted) 1-20C alkyl, alkoxyalkyl, phenyl or group of formula II [Y is pehnylene or cyclohexylene which may be nucleus-substituted with halogen, OH, nitrile, lower alkyl or lower alkoxy; when Y is phenylene, it may be bonded with N through a lower alkylene of formula -(CH2)1-3-; Z is -O-, -CH2O-, -CH=N=, etc.; R1 is halogen, OH or (nitrile-substituted) 1-15C alkyl; r is 1 or 2]; X is halogen, OH, nitrile, lower alkyl or lower alkoxy; n is 0-7}.

Inventors

• 👤 Yasuyuki Yamada
• 👤 康之 山田
• 👤 Tadaaki Tanaka
• 👤 忠明 田中
• 👤 Isao Nishizawa
• 👤 西沢　功
• 👤 Akira Hirayama
• 👤 平山　彰

Bibliographic Details