is improving its technological competitiveness with organic light-emitting diode (OLED) in almost every aspect of display technological issues such as visibility, resolution, panel power consumption, and color gamut, [1][2][3][4][5] the development of an innovative liquid crystal (LC) mode is still essentially required to enter novel display application fields such as curved, rollable, and flexible displays to compete with OLED's superior mechanical flexibility. [6] In contrast to OLED that is composed of thin organic solid layers, LCDs consist of fluidic LC molecules for transmittance level control by utilizing field-switchable birefringent effects. Thus, their electrooptical (EO) properties, such as transmittance in bright state, light leakage in dark state, contrast ratio (CR) levels, and LC texture uniformity, highly depend on the cell gap uniformity of LCDs, initial LC alignments, and LC geometries of the field-induced molecular reorientations. These LCD properties are highly sensitive to external stress conditions, such as local pressure and substrate bending because the LC orientations are distorted and the LCD cell gap is positionally varied under the externally deformed conditions.As an LC mode that is more suitable for flexible displays, the polymer-dispersed liquid crystal (PDLC) has been widely studied in LCDs. [7][8][9][10][11] The PDLC structure is a valuable approach in achieving flexible display applications due to its various advantages, including simple fabrication without requiring alignment layers, high mechanical stability by the polymer matrix, wide and symmetric viewing angle properties, and large-scale applicability. [10,11] Contrary to conventional LCDs, the LC molecules in the PDLC structure are formed within randomly dispersed LC droplets encapsulated within the polymer matrix, which also have random distributions in their effective optic axis. Accordingly, several types of the phase separation process have been proposed to obtain this PDLC structure. These include polymerization-induced phase separation (PIPS), thermally induced phase separation, and solvent-induced phase separation. [8,9] Among these, PIPS is one of the most widely used methods for fabricating the PDLC structure because the PDLC morphologies, such as the LC droplet size and density, can be controlled by varying the phase separation conditions, such as the relative molecular mixing ratio between the LCs and the prepolymers, In this study, a printing-based scalable method is proposed for the higher density of a liquid crystal (LC) nanodroplet structure suitable for the optically isotropic LC mode where the LC nanodomains are accurately templated by a nanoporous breath figure (BF) membrane. The highly porous BF polymeric template structure is reliably obtained by utilizing self-structured packing effects of the silica nanospheres achieved by doctor blade coating. A nanocomposite film with densely packed silica nanospheres encapsulated by the UV-crosslinked polymer matrix is made by controlling the blade coating velocity ...
