Simulation of Low Driving-Voltage Liquid-Crystal Lens

Abstract

Liquid crystal (LC) lens driven by two voltages has excellent lens properties and can be applied for imaging devices. The realization of an LC lens with a large aperture but low driving voltages using a thin layer of transparent material of high resistivity has been reported. Then an LC lens structure using a resistive film directly in contact with one of the LC layers has been proposed. It became possible to use the substrate between the patterned electrode and the LC layers less than 0.3mm, and consequently the driving voltages are greatly dropped. In this study, the effects of transparent film with high resistivity and the lens power dependence on the applied voltages are studied numerically; that is, the influences of some factors such as resistivity of material and driving frequency on the lens properties are discussed comparing with the experimental results of the same LC lens structure.