17.4: Novel Liquid‐Crystal Materials with High Birefringence and Low Rotational‐Viscosity for the Field‐Sequential Color TN‐LCDs

Abstract

Liquid crystal (LC) materials with features of coexistence of high birefringence and low rotational-viscosity were developed, by introducing novel class of tolane substances. Those LC mixtures exhibit voltage-holding-ratio high enough for active matrix addressing, and their excellent physical properties improve the TN-mode display performances significantly. The extremely fast switching characteristics enable TN LC panels to be applicable to field sequential color displays.

Nano-Structured Organic Devises and Biosensors Utilizing Evanescent Waves and Surface Plasmon Resonance

“…For example, an image-sticking [23] occurs when a residual image is displayed as a result of continuous display of the same image for long periods of time. It is known that this is caused by a residual direct current (DC) voltage due to space-charge polarization, and an interaction between alignment layers and LC molecules near the interface [24], [25]. Hence, a detailed evaluation of interfacial phenomenon are desired to understand how the space charge polarization affects to the alignment properties of LC molecules at the interface [26], [27].…”

Double-Pulse Scan of Field Sequential Color Driving of Optically Compensated Bend Cell

“…Field-sequential color (FSC) LCDs have been reported as one of the candidates for realizing full-color LCDs without color filters. [1][2][3][4][5][6][7][8][9] In FSC-LCDs, backlights sequentially flashing in the order of R, G, and B replace color filters. That is, FSC-LCDs display a color image using a temporal color mixture instead of a spatial color mixture.…”

“…Various attempts for FSC driving using LC modes with fast response time, such as ferroelectric LC (FLC), 1,2) low cell-gap twisted nematic (TN) modes with low viscosity 3) and optically compensated bend (OCB) modes with nematic LC, [5][6][7][8][9] have been reported. However, low cell-gap TN-LCDs have a low yield in the manufacturing process and FLC displays have some difficulties in achieving a highquality alignment without defects.…”

High Birefringence Nematic Liquid Crystals for Display and Telecom Applications

“…Fluorinated LCs also contribute to the decreasing of optical anisotropy which leads to a This work was supported by DARPA=ALCOM grants.better viewing angle. An appropriate selection of the fluorine atom's position can lower the viscosity, reduce melting points, depress the temperature of smectic phase formation and improve solubility and stability [2,4,5]. For almost all display applications, a faster response time is required.…”