P-130: Large-Cell-Gap Bistable TN-LCD Based on Dual-Frequency Operation

A New BTN LCD with High Contrast Ratio and Large Cell Gap

The optical properties of a (0, 2π) transmissive BTN LC cell is optimized by parameter space method. Experimentally the high contrast ratios above 80 within -80° to 80° viewing angle ranges were first obtained. The highest contrast ratio is 250. The large d∆n makes this new BTN large cell gap and low operating voltage possibility. Introduction Bistable twisted nematic (BTN) liquid crystal displ...

22.2: Photoaligned Transmissive Bistable TN-LCD

P-156: Transflective Double Cell TN Liquid Crystal Display

Double cell Twisted Nematic (DTN) liquid crystal display is optimized for transflective liquid crystal displays, using MOUSE-LCD software. Two configurations of such DTN-LCD were simulated using a double and a single cell gap approach. DTN-LCD exhibits a high contrast ratio, wide viewing angles and achromatic (black/white) switching in both the transmissive mode and reflective mode. It also pos...

High Performance Transmittive Bistable Twisted Nematic Liquid Displays

Several new transmittive bistable twisted nematic liquid display (BTN-LCD) modes are developed. Unlike previous versions, these BTN modes do not require cross polarizers. Experiments confirmed that these modes have high contrast ratio and reasonably high transmittance. The dispersion characteristics of some of these modes are comparable to ordinary waveguiding TN modes. That is, they afford tru...

Achromatic Linear Polarization Switch for Visible and Near Infrared Radiation Based on Dual-Frequency Twisted Nematic Cell

The switchable polarization rotators are of prime importance in many modern optical applications, such as displays, spatial light modulators, and beam deflectors. Such a rotator can be designed with a half-wave electrically controlled nematic cell with antiparallel alignment at the two boundary plates. However, this rotator can operate only in a narrow spectral band where the half-wave conditio...