SINGLE-POLARIZER STN LIQUID CRYSTAL DISPLAY

摘要

The invention pertains to a single-polarizer, normally black reflective display comprising an STN-LCD cell, a reflector, one polarizer, and a twisted retardation layer, characterized in that the sign of the twist angle of the STN-LCD cell (TSTN) is opposite to the twist angle of the twisted retardation layer (TRL) and that| TSTN| - TRL| is 30° to 90°, and RSTN - RRL| is 10 - 700 nm, wherein RSTN and RRL stand for the retardation values of the STN-LCD cell and the retardation layer, respectively, and that the difference between the dispersion of the retardation layer and the STN-LCD cell is more than 5 %, wherein the dispersion is defined as the ratio of the retardation value at μ=436 nm to the retardation value μ=668 nm.