Abstract
This paper introduces a DSP-based portable electrical characteristics detector for liquid crystal materials. It can accomplish the real-time dynamic testing of the liquid crystal electrical parameters via real-time regulating voltage and frequency of the driving signal. So the continuous response characteristic of the materials can be obtained and its breakdown characteristics and failure mechanism can be investigated. Because frequency of testing signal source continuously varies, the detector utilizes on-chip event-manager module and A/D converter module to realize realtime frequency track and entire cycle sampling. The least square fitting method is used to correct dynamic measuring error.
Published Version
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