The controllable of alignment state of polyimide-free liquid crystal displays by adjusting parameter of process technology

Abstract

In this report, we systematically investigated the influence of the concentration of additive, the routes and temperature of possess, liquid crystal drop filling pattern and diffusion distance on the polyimide-free liquid crystal display. We explores a series of LC cells containing SVA additive with different concentration, including mass ratio of 1%, 2 %, 3%. Adjusting process temperature and routes, we raised temperature at 120 °C before UV light irradiation, then compared alignment force variation at different concentration of additive. We also investigate the effect of additive diffusion distance on polyimide-free liquid crystal display by changed LC drop filling pattern. The obtained LC cells were characterized and tested using microscope, liquid crystal reliability measuring nstrument. In this report, we will describe the alignment state, voltage holding property(VHR), and electro-optical property of SVA-LC cells. We presume the inner relationship among alignment force, additive concentration and diffusion distance. The self alignment force will decrease with diffusion distance increasing, increase with concentration increasing.