— Experimental study and numerical simulations of optical phase modulators based on nematic liquid crystals characterized by frequency sign inversion of the dielectric anisotropy has been performed. ...The received results point out an extreme role of back‐flow effects and electro‐hydrodynamic instability, which make restrictions for creating high‐speed phase modulators with large switchable values of phase retardation. It is shown by numerical simulations that the hydrodynamic destabilization can be suppressed by decreasing the ratio of Leslie coefficients |α2/α4,5|.
A New Reflective Color Guest-Host Display with Scattering Effect Seki, Hidehiro; Sugiura, Norio; Shimizu, Masahiro ...
Molecular crystals and liquid crystals science and technology. Section A, Molecular crystals and liquid crystals,
19/9/1/, Letnik:
304, Številka:
1
Journal Article, Conference Proceeding
A bright reflective LCD without a backlight is a key device for portable information systems. This paper proposes a new Guest-Host type liquid-crystal display. It consists of a light control film ...(LCF), a phase change type Guest-Host (PCGH) liquid-crystal layer and a mirror substrate. The device docs not need a polarizer that absorbs at least half of the incident lights. The structure is simple in comparison to the reflective PCGH LCD with a geometrically controlled reflection mirror. Optimization of the characteristic of LCF in the new device will promise a very bright reflective LCD.
