Liquid crystal device manufacturing methods of controlling a partial switching

摘要

In the manufacture of a ferroelectric liquid crystal cell, alignment layers provided on the inside surfaces of the substrate structures for imparting a preferred alignment to the molecules of the liquid crystal layer in the vicinity of the layers are formed by deposition of two different alignment solutions, such as LQT120 and JALS212 for example, on the substrate structures. A mixture of the alignment solutions was applied by spin coating and subsequently the solvent was evaporated by prebaking prior to a further baking step and a rubbing step to impart a preferred alignment direction. The resulting alignment layers have a speckled structure in which areas of one type are interspersed within areas of another type. The different areas have different alignment properties which serve to control switching of molecules of the liquid crystal material between alignment states in response to an applied electric field. In this manner it is possible to effect control of the partial switching behaviour of the device and to control the analogue greyscale in a display device.