| 摘要 |
<p>PURPOSE:To enable negative type color display with high sharpness and contrast in spite of low voltage driving, by applying an orientation treatment of a small tilt angle on one of substrates and applying an orientation treatment of a large tilt angle on the other. CONSTITUTION:An orientation model of a liquid crystal molecule 5 and a dichromatic dye component under no voltage when an orientation film 2 by 85 deg. vapor deposition is applied on an upper substrate 1 and an orientation film 4 by rubbing is applied on a lower substrate 3 is formed by using a liquid crystal compsn. consisting of a nematic liquid crystal having positive dielectric anisotropy, a dichromatic dye and a cholesteric liquid crystal. The orientation control force of the liquid crystal molecule when an orientation treatment of a small tilt angle is applied is weaker than the force at a large tilt angle, and the liquid crystal which is increased in the twist angle by application of the orientation treatment of a small tilt angle by rubbing on both upper and lower substrates decreases contrast by inducing a light scattering state even if no voltage is applied thereto. Therefore, if the orientation treatment of a large tilt angle by 85 deg. vapor deposition is applied on one of the substrates, the orientation controlling force increases and the generation of the light scattering state is difficult even if the twist angle is increased.</p> |
