Electrical temperature sensor e.g. digital strip thermometer for temperature sensing operation has liquid crystalline material with transition temperature at which it undergoes phase change between polar and non-polar states

Ingo Dierking (Other), Syngenta Ltd (Other), H GLEESON (Other), I DIERKING (Other), S KAUR (Other), B GRIEVE (Other), N WOODYATT (Other), P BRIMICOMBE (Other), S KAUL (Other), N C P WOODAT (Other)

    Research output: Patent

    Abstract

    Abstract: NOVELTY - Electrical temperature sensor (10) has electrical contact plates (14,16) that contact liquid crystalline material (12); and electric property measuring device electrically connected to contact plates and measures electric property e.g. impedance of liquid crystalline material. Liquid crystalline material has transition temperature at which it undergoes a phase change between polar and non-polar states causing step change in electric property of liquid crystalline material. Polar state is ferroelectric or ferrielectric phase. Non-polar state is non-ferroelectric or non-ferrieelectric phase.USE - Electrical temperature sensor e.g. digital strip thermometer for temperature sensing operation.ADVANTAGE - Provides temperature sensor that is easier and cheaper to construct, prevents having to heat the temperature sensor to high temperature and cooling slowly to promote uniform alignment, and enables utilization of liquid crystalline material that is not capable of being aligned uniformly by not aligning the liquid crystalline material uniformly in relation to the substrates. Provides low cost temperature sensor with output that is easily integrated to the electrical system.
    Original languageEnglish
    Patent numberWO2010097279-A2 ; WO2010097279-A3 ; TW201031899-A ; US2011310926-A1 ; EP2401593-A2 ; CN102334018-A ; JP2012519268-W ; CN102334018-B ; JP5524985-B2 ; US9016937-B2 ; TW201518699-A
    Publication statusPublished - 27 Feb 2009

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