Application guided wave method in testing for a vertical aligned liquid crystal cell

After many experiments of vertical alignment liquid crystal cell have been carried out, a series of reflectivity–internal angle curves at several driving voltages was obtained. Then the liquid crystal multi-layer optical theory and the elastic continuum theory were applied to make the theoretical curves. By adjusting the parameters of both liquid crystal material and the cell according to experimental conditions, the theoretical curves calculated were in good agreement with experimental curves. Thus the director profile in this cell is achieved. This experimental method described in this article is shown possible to measure a number of important parameters of liquid crystal material and the cell.