Advanced gray-scale compensator for TN-LCDs for avionics applications

摘要

The gray-scale and contrast-viewing-angle deficiencies of normally white TN-LCDs must be overcome for the device to be utilized in high-performance avionics display applications. A compensator that enhances the contrast and gray scale of normally white TN-LCDs over a wide range of viewing angles is described. The compensator includes a unique biaxial element with an obliquely oriented principal optical axis. The compensator's design, fabrication, modeled performance, and performance measured on an avionics display system are presented.