A new, highly multiplexable liquid crystal display

Abstract

A new, highly multiplexable liquid crystal display is described, which has a superior image quality than a twisted nematic display multiplexed at the same high level. The display cell consists of a chiral-doped nematic layer with tilted boundaries and a twist angle of ∼270°. It operates in a birefringent optical mode between two ‘‘nonconventionally’’ oriented polarizers. Performance characteristics presented for a 120×240 dot matrix panel multiplexed at a 1/120 duty cycle include driving voltages compatible with complementary-metal-oxide-semiconductor technology, 300-ms response times, a contrast ratio of 10:1 at normal incidence, and ≥4:1 inside a viewing cone of 45° from the vertical.

Determination of Orientational Order Parameters of Two Tri-Component Mixtures from Optical Birefringence and X-Ray Diffraction Measurements

“…However, the greatest drawbacks of the TN LCD's are their narrow viewing angle, low contrast and slow response times. In contrast, the vertically aligned (VA) mode LCD's [1][2][3][4][5], based on liquid crystal materials with negative dielectric anisotropy, offers a superior picture quality with wide viewing angle [6,7], high contrast [8] and video-compatible switching times [9,10]. Liquid crystalline materials suitable for VA mode LCD's are mainly focused on dielectrically negative fluorinated liquid crystals comprising of 1,2-difluorobenzene building block [11] which combine the necessary polarity with chemical stability and low polarizability [12,13] suitable for their application in VA mode LCD's.…”

Tunable terahertz reflection of graphene via ionic liquid gating

“…Furthermore, the ionic liquid-based electrical gating enables spatially resolved THz engineering by simply patterning the graphene films [12]. Analogous to the advent of liquid crystals in electronics [35][36][37] over the past few decades, it is foreseeable that the devices proposed in this study will similarly pave the way for graphene applications in the THz range. Many devices, such as THz mirrors, deformable THz mirrors/modulators, variable THz beam splitters and even THz 3D imaging will benefit from the tunable reflectance of graphene.…”

Study of the molecular configuration and the dipole moment in fluorinated liquid crystals

“…Fluorinated nematic LC compounds offer stability, low threshold voltage (V th ), small temperature coefficient (dV th /dT), voltage holding ratio, and specific resistance [1][2][3][4]. Therefore, the search for applications for fluorinated LC materials has intensified.…”