| 摘要 |
A cholesteric guest-host liquid crystal composition having a positive dielectric anisotropy and consisting of a positive nematic host component, an optically active cholesteric component, and a tetra-azo dichroic dye guest component having a dichroic ratio of at least 0.72. The tetra-azo dye is selected from the group consisting of <IMAGE> <IMAGE> +TR <IMAGE> R1 = OCH3, H R2 = CH3, H R3 = OCH3, H R4 = CH3, H R5 = CH3, H
|
