Reactive monomer added photodecomposition polyimide film are exposed to linearly polarized UV. After irradiation, polyimide film gives LC alignment, perpendicular to polarization direction of the UV irradiation. LC aligning direction is measured by polar diagram. We had time to adjust during 10min-1hour. And We exposed to linearly polarized UV the angle vertically or horizontally by measured the degree of LC alingnment.
We studied that effect of polarized UV light on rubbed polyimide film. Anchoring energy of liquid crystal with aligning surface was measured. Irradiation of polarized UV light on rubbed Polyimide film suppressed effective anchoring energy. Linearly polarized UV light on rubbed polyimide film controlled anchoring energy effectively.