10-6 Definition of a design parameter in biaxial retardation films for viewing angle property

Abstract

In order to realize excellent liquid crystal displays (LCDs), designing of optical compensation film is important. Conventionally, retardation film is designed by using normal retardation Δnd and a parameter to define oblique angle property such as Nz or Rth. However, we found both Nz and Rth are unsuitable to design accurate viewing angle property. Then, we propose a new parameter Tz to design the viewing angle property of LCDs strictly.