The Thermal Treatment Effect of a Photo-Alignment Layer on LC Pretilt Angle

抄録

Liquid crystal molecules on a photo polymer, PVCN-F irradiated linearly polarized ultra-violet light(LP-UV) are aligned perpendicular to the polarization of UV light. The degeneracy of pretilt angle direction could be broken by liquid crystal injection at nematic phase. To control the magnitude of the pretilt angle, we investigated the values and thermostability of pretilt angle depending on parameters such as LP-UV exposure time, curing temperature and aging temperature. From these results, it is found that the control of pretilt angle can be accomplished by the change of LP-UV exposure time and curing temperature.