Optical design for single-mode and single-cell gap transflective liquid crystal displays

Abstract

Generally, for transflective liquid crystal displays with different modes and different cell gaps between the refractive and transmissive parts, precise process control to pattern the electrode and match the cell gaps may reduce the yield and thus, require high cost. This paper proposes a simple transflective liquid crystal display with a single-mode and single-cell thickness without a patterned electrode to achieve better productivity. The proposed transflective liquid crystal display consists of three half-wave retardation films, two quarter-wave retardation films, and an LC layer, whose optical performance was confirmed by both simulation and experiment. The optimal optical configuration to obtain an excellent dark state in the visible range was determined by the Mueller matrices calculus, which was applied to each optical component. The calculated and experimental results showed that the proposed transflective LC structure has excellent electro-optical properties and is expected to have many liquid crystal display applications.

58‐1: Transflective ADS‐LCD with High Contrast Ratio and Wide Color Gamut for Better Productivity

“…Another reported transflective LCD designed for a single-mode and single-cell gap, the transflective LCD has an extremely complex structure which consists of three half-wave retardation films, two quarter-wave retardation films, an LC cell, reflector, and a polarizer. Unfortunately, this transflective LCD has not been applied to industry due to accuracy of films, and the fit with the requirements to improve the surface [3,4]. In this paper, we propose a transflective Advanced Super Dimension Switch liquidcrystal display (ADS LCD) using outer-cell transflective layer, demonstrating that the transflective ADS LCD has high contrast ratio and wide color gamut.…”