Analysis of Reflective Part with Wide-Band Property in Single Gap Transflective Fringe-Field Switching Mode

Abstract

This study investigates reflective mode with wide-band property using liquid crystal (LC) cell (λ/2) and inner retarder (λ/4). In wide-band type, the maximum contrast ratio increases and viewing angle decreases compared with the case that slow axis of LC and the transmission axis of analyzer coincide. However, for perfect dark state, the retardation of LC cell should be kept 0.275 µm. If not, maximum CR decreases from 150 to 100.

Fringe-Field Driven Single-Gap and Single-Gamma Transflective Liquid Crystal Display with Dual Orientation of Liquid Crystal

“…One of drawbacks of conventional transflective displays was narrow viewing angle because the liquid crystal (LC) director tilts up in one direction in the transmissive mode. In order to solve such a low image quality problem, homogenously aligned LC transflective cells driven by fringe electric field [named fringe-field switching (FFS)] 5,6) with a dual cell gap in which the LC director rotates almost in plane was proposed. However, this device is difficult to manufacture due to the different cell gaps in the transmissive (T) and reflective (R) regions.…”