Abstract
Focus tunable dielectric liquid lens, its size is miniaturized and is applied to kinds of electrical products now. Hence, the way to quickly predict the behavior of the droplet of the liquid lens becomes important. In the dielectric liquid lens, the gravitational factor of two immiscible liquids could be eliminated by identical/similar density. Other forces, such as surface tension force, dielectric force, friction, are affected by liquid basic properties and environments, for example, actuating voltage, so that it should be discussed more deeply. It will be a time consuming work if we test every different kind of liquid mixture. In this study, we try to use the view of energy transferring and built a nonlinear lumped element model of dielectric liquid lens, including equation fittings of basic liquid property, such as density, surface tension, interfacial surface tension, refraction, dielectric constant and viscosity, and the relationship between basic liquid properties and parameters of dielectric liquid lens like contact angle and actuating voltage. By doing so, we could quickly choose the appropriate parameters and conduct the experiment, instead of time and material waste. With regard to equation fittings of basic liquid property, density, surface tension, interfacial surface tension, refraction, dielectric constant and viscosity could be fitted in linear, logarithm, logarithm, linear, 2ndpolynomial and exponential equation, respectively. The relationship between actuating voltage and the cosine value of the contact angle of working droplet could be fitted by 2ndpolynomial equation, based on the experimental results conforming to the trend chart of theoretical values.