Compounds for detecting the phase transition of liquid crystal, method for detecting the phase transition of liquid crystal and an alarm device using the same

摘要

crystal phase change detection compound is provided a liquid crystal phase-change detection methods and emergency alarm display device using the same. ; in the liquid crystal compound phase-change detecting compounds according to the invention is added to the liquid crystal for detecting a change in the liquid crystal phase , and is excited by the light emitted by the fluorescent dye compound is irradiated , the excited dye compound the fluorescence intensity increases through the process of alignment at the same angle as the vibration direction of the polarized light to the adjacent liquid crystal molecules , using the increase in fluorescence intensity changes , it is possible to determine a phase change with the naked eye is likely to detect a phase change of the liquid crystal .