The effect of monomer and chiral dopant content on reverse-mode polymer stabilized cholesteric liquid crystal display

Preparation of transmittance-switchable composites from a coexistent system of polymer-dispersed and polymer-stabilized cholesteric liquid crystals

“…After the removal of the low-frequency electric field, the stabilizing effect of the liquid crystalline polymer network induced the CLC molecules to return to the homogeneous orientation state, and the device also re-obtained the large transmittance. 42,51 The digital photographs of sample B2 at different states are exhibited in Fig. 10.…”

“…However, reverse-mode smart windows need a quick recovery of the large transmittance after removing the low-frequency field. 42 Unfortunately, it is also difficult to achieve a reverse-mode effect for conventional PDCLCs employing a negative dielectric anisotropy LC host because the disordered isotropic polymer matrix induces random arrangement but not homogenous orientation of CLC molecules. 33…”

“…However, reverse-mode smart windows need a quick recovery of the large transmittance after removing the lowfrequency field. 42 Unfortunately, it is also difficult to achieve a reverse-mode effect for conventional PDCLCs employing a negative dielectric anisotropy LC host because the disordered isotropic polymer matrix induces random arrangement but not homogenous orientation of CLC molecules. 33 In this work, the key objective is to fabricate a PD&PSCLC system, in which the isotropic polymer walls make up the PDCLC microstructure and the liquid crystalline polymer network in the CLC droplets constructs the PSCLC system.…”

Preparation of Highly Durable Reverse-Mode Polymer-Stabilized Liquid Crystal Films with Polymer Walls

“…Although normal-mode films can be produced in large-scale roll-to-roll and the production cost is greatly reduced, the normal-mode films still have the problem of viewing angle, high driving voltage, and low contrast ratio. − In addition, most doors and windows in buildings or cars need to be kept transparent for a long time, which requires a large area of films to be energized for a long time . In this case, the reverse-mode electrically switchable light-transmittance controllable films (transparent at the off-state and opaque at the on-state) will have promising applications in smart cars and buildings. − Generally, the reverse-mode films are prepared with PSLC films, which incorporate a small number of polymer into LC materials to stabilize the orientation of LC molecules. Without electric fields, the LC molecules are orientated in the same direction as the polymer networks, and the device is transparent.…”

P‐106: Student Poster: Highly Thermal Stable Polymer Stabilized Cholesteric Liquid Crystals Smart Window

“…After removing the external voltage, the PSCT returns to initial P state under the dual effect of the interaction between the LC molecules and the equilibrium orientation of the polymer network, and PSCT becomes transparent and reflects IR light again. Due to the stabilizing effect of the polymer network, the Ch LCs cell can switch cyclically and stably between the transparent state and the opaque state [9,10]. The PSCT could also be initialized in normal opaque mode (a reverse mode of former normal transparent mode), in which the Ch LCs are in scattering texture (Fc) without the external electric field and could be lateral switched to transparent mode by external electric field.…”