Display base having a retardation control function with a high voltage holding ratio

Abstract

A display board with a retardation control function has a retardation control layer containing liquid crystalline polymers with a fixed orientation, and a liquid crystal layer. The display board has a voltage holding ratio of 90% or higher after a forced impurity extraction is performed on the display board with the retardation control layer in contact with the liquid crystal layer, and application of a voltage to the liquid crystal layer. The display board is capable of providing a high quality display while preventing a drop in the voltage holding ratio attributed to impurities mixed into the liquid crystal layer, and thus preventing the occurrence of display defects, such as flickering.

Dependencies are inferred from the claim text.