Examinando por Autor "Urruchi, Virginia"

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Liquid Crystal Temperature Sensor Based on Three Electrodes and a High-Resistivity Layer
(IEEE, 2015-07-01) Algorri, José Francisco; Contreras Lallana, Pedro; Urruchi, Virginia; Sánchez Pena, José Manuel
— In this paper, a novel liquid crystal (LC) temperature sensor is proposed and theoretically analyzed. A detailed analytical model has been presented. The sensor is designed and optimized to produce maximum sensitivities. This sensor is composed of only three electrodes. The electrodes are very simple and can be easily designed for different sizes. The structure uses the temperature dependence of the LC permittivity as sensing magnitude. Several LC have been investigated. The response improves the characteristics of previous LC sensors and even some commercial sensors in terms of sensitivity or linearity. The sensor has a high sensitivity, low-voltage control, low power consumption, and high linearity. The main advantage is the possible integration of this sensor in other LC devices.
Modal liquid crystal temperature sensor
(IEEE, 2014-12-15) Algorri, José Francisco; Contreras Lallana, Pedro; Urruchi, Virginia; Sánchez Pena, José Manuel
In this work, a novel liquid crystal temperature sensor is proposed. This sensor is composed by only two electrodes. A simple and easily scalable structure uses the temperature dependence of the liquid crystal permittivity as the sensing magnitude. The sensor has a high sensitivity, low voltage control, low power consumption and high linearity. The analytical modelling allows an optimization of the structure, in terms of sensitivity. Several liquid crystal has been investigated. The response improves the characteristics of previous LC sensors and even some commercial sensors (e.g. 60 mV/°C for 10 V rms of applied voltage, six times more than of most silicon temperature sensors).