Fast liquid crystal optical shutters due to fast switching, vibrationless control and optical properties have found various applications: substitutes for mechanical shutters, 3D active shutter glasses, 3D volumetric displays and more. Switching speed depends not only on properties of liquid crystal, but also on applied electric field intensity. Applied field in the shutters can exceed >10 V/micron which may lead to dielectric breakdown. Therefore, a dielectric thin film is needed between transparent conductive electrodes in order to reduce breakdown probability. In this work we have compared electrical and optical properties of liquid crystal displays with dielectric thin films with thicknesses up to few hundred nanometers coated by flexo printing method and magnetron sputtering. Dielectric breakdown values show flexographic thin films to have higher resistance to dielectric breakdown, although sputtered coatings have better optical properties, such as higher transmission and no coloration.
Gatis Mozolevskis, Ilmars Sekacis, Edgars Nitiss, Arturs Medvids, and Martins Rutkis, "Dielectric breakdown of fast switching LCD shutters," Proc. SPIE 10126, Advances in Display Technologies VII, 1012607 (Presented at SPIE OPTO: February 02, 2017; Published: 16 February 2017); https://doi.org/10.1117/12.2252492.
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