Ferroelectric polymer nanocomposite alignment layer in twisted nematic liquid crystal devices for reducing switching voltage

Anisotropic Surface Formation Based on Brush-Coated Nickel-Doped Yttrium Oxide Film for Enhanced Electro-Optical Characteristics in Liquid Crystal Systems

“…This value represents the enhanced voltage operating characteristic of the NYO film compared to that of conventional PI layers [31]. This also demonstrates the superior threshold voltage property compared to other recent studies of LC alignment layers [32,33]. Importantly, this low operating voltage results in low consumption of power.…”

Oriented Yttrium Strontium Tin Oxide Micro/Nanostructures Induced by Brush Coating for Low-Voltage Liquid Crystal Systems

“…The operating voltages were obtained as 0.67 V for the brush-coated YSrSnO layer and 1.81 V for the conventional PI layer, as shown in Figure b; it is worth noting that the voltage for the brush-coated YSrSnO layer is almost three times lower than that of the conventional PI layer . Better performance is also observed compared to other recent studies with regard to low-voltage operation in TN-LC systems. , This low threshold voltage can be applied to functional LC devices with dramatically reduced power consumption. These outstanding qualities are attributed to the dielectric characteristics of the yttrium, strontium, and tin oxide, which are the main components of the YSrSnO film. − The anchoring energy characteristic was examined in Figure c, and the anchoring energy value of the YSrSnO alignment layer was measured to be 2.9 × 10 –4 J/m 2 .…”

“…38 Better performance is also observed compared to other recent studies with regard to low-voltage operation in TN-LC systems. 39,40 This low threshold voltage can be applied to functional LC devices with dramatically reduced power consumption. These out- standing qualities are attributed to the dielectric characteristics of the yttrium, strontium, and tin oxide, which are the main components of the YSrSnO film.…”

Vanadium Dioxide Nanoparticle Doped Polyimide Hybrid Alignment Layers for Flexible Liquid Crystal Displays

“…11,12 These days nanomaterials are doped in PI alignment layers and show remarkable feasibilities in modulating the alignment of LCs and accelerating their switch. For instance, LCs sandwiched between opal crystal thin layers are homeotropically aligned because of the undulated surface topography, 13 improved order parameter (S); 14 carbon nanotube (CNT) doped PI alignment layers with the reconstructed surface topologies, large elastic constant, and large order parameter are efficient to accelerate the switch of LCs; 15,16 the conjugated block copolymer alignment layers with two-dimensionally (2D) networked embedded ultrathin single wall carbon nanotubes (SWNTs) also show significant advantages in superfast switching LCs at lower operating voltage; 17 silver nanoparticle doped PI alignment layers are highly transparent and are able to trap the mobile ions in LCs to reduce the residual direct current; 18 ferroelectric zinc oxide (ZnO) doped PI alignment layers producing the local electric field can trigger the orientation of LCs, and the augmentation of capacitance with the increase in doping concentration also reduces the switching voltage; 19,20 high transparent ferroelectric barium titanate (BaTiO 3 ) nanoparticle doped hybrid alignment layers reduce the Frederik operating voltage and the saturation voltage of LCs. 21 Attractive plasmonic switchable vanadium dioxide (VO 2 ) nanoparticles undergoing the transition from insulating dielectric to conductive metallic state under the thermal or electromagnetic stimulus yield the accumulation or delectation of carriers and show prior advantages in promoting LCs' switching.…”

“…Polyimides (PIs) are the most common alignment layers in LCDs because of their excellent dielectric property and super optical performance, but their additional shielding effect on the external electrical field slows down the switch of LCs. , These days nanomaterials are doped in PI alignment layers and show remarkable feasibilities in modulating the alignment of LCs and accelerating their switch. For instance, LCs sandwiched between opal crystal thin layers are homeotropically aligned because of the undulated surface topography, and the LCs sandwiched between SiO 2 doped PI alignment layers are homogeneously aligned in electrically controlled birefringence (ECB) mode with a much higher transmittance because of the improved order parameter ( S ); carbon nanotube (CNT) doped PI alignment layers with the reconstructed surface topologies, large elastic constant, and large order parameter are efficient to accelerate the switch of LCs; , the conjugated block copolymer alignment layers with two-dimensionally (2D) networked embedded ultrathin single wall carbon nanotubes (SWNTs) also show significant advantages in superfast switching LCs at lower operating voltage; silver nanoparticle doped PI alignment layers are highly transparent and are able to trap the mobile ions in LCs to reduce the residual direct current; ferroelectric zinc oxide (ZnO) doped PI alignment layers producing the local electric field can trigger the orientation of LCs, and the augmentation of capacitance with the increase in doping concentration also reduces the switching voltage; , high transparent ferroelectric barium titanate (BaTiO 3 ) nanoparticle doped hybrid alignment layers reduce the Frederik operating voltage and the saturation voltage of LCs …”