Electro-optical performance of polymer-stabilized sphere phase liquid crystal displays

Abstract

Electro-optical properties of polymer-stabilized sphere phase liquid crystal (PS-SPLC) switching devices are analyzed and validated experimentally. The experimental results show the voltage-dependent transmittance curves of PS-SPLC devices. A diffraction approach, called extended anomalous diffraction approach, is proposed to fit the experimental data. Good agreement between experiment and model is obtained. The scattering model provides practical guidance for the improvement of PS-SPLC displays performance and optimization.

33.1: Invited Paper: Electro‐Optical Performance of a Novel Liquid Crystal Material

“…Here, λ is reference wavelength, K is the Kerr constant of disclination in PS-SPLC. Taking into the disclinations, we propose the following approach to get the total droplet cross section: [8]…”

A Tunable NIR Filter with Sphere Phase Liquid Crystal

“…In this work, we demonstrate a tunable NIR filter based on sphere phase liquid crystal (SPLC). The sphere phase, usually observed between the isotropic phase (Iso) and chiral nematic phase (N*) or between the isotropic phase and blue phase, has been demonstrated by Jiliang Zhu [15][16][17][18]. Like the BPLC, the SPLC is composed of self-assembly periodic helical structures and disclinations among them, as shown in Figure 7 [15].…”

“…When the temperature was above 351 K in the isotropic phase, the transmittance was insensitive to the temperature change because there was no periodic structure in the isotropic phase. The transmittance decreased from 351 K to 345 K in the sphere phase as the growth of the 3-DTS structures enhanced the scattering effect in the lattice formation process [15,18]. Additionally, the transmittance gradually increased at the SP-N* coexistence phase from 345 K to 343 K given the larger scattering effect of 3-DTS structures induced by the discontinuous grain boundaries between 3-DTSs than the one-dimensional periodic helical structure [17].…”

Template Effect of Multi-Phase Liquid Crystals

“…By polymer network, the thermal stability problem of BPLCs has been solved [7], which is desirable for potential applications in field sequential displays [8,9], three-dimensional (3-D) tunable photonic crystals [10,11], and phase modulator devices [12], owing to their interesting features, including sub-millisecond response times, optically isotropic dark states, alignment free, and periodic 3-D helical structures on the order of the visible wavelength [13]. SPLCs are usually observed in a narrow temperature range between the isotropic phase and cholesteric phase, or between the isotropic phase and blue phase due to their weak thermal stability, which is similar to that of BPLCs [14][15][16][17]. However, in contrast to BPLCs, SPLCs show optical anisotropic status.…”