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Institute of Korean Electrical and Electronics Engineers (한국전기전자학회)
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A study on the transmittance-controlled liquid crystal cell

광 투과도 제어형 액정 셀 연구

  • Received : 2019.12.03
  • Accepted : 2019.12.26
  • Published : 2019.12.31
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Abstract

In this study, a liquid crystal (LC) cell was manufactured for smart window applications, such as blinds, and a system for controlling the light transmission rate was developed. The threshold voltage of the LC cell was 1.325 V and when the transmission rate was 10%, the voltage showed 2.370 V, indicating that the LC cell manufactured is driven at low voltage. The LC cell also operated reliably after being heated for 10 min at 80℃. with a response time of less than 30ms. The operation system designed the applied voltage of the LC cell with a interval of about 0.5 V from 0.15 V to 3.53 V and confirmed that the light transmission rate of the LC varies depending on the actual applied voltage. These results suggest that LC cells are likely to be smart window applications.

본 연구에서는 블라인드와 같은 스마트 윈도우 응용을 위해 액정 셀을 제작하였고, 광 투과율이 조절되는 시스템을 개발하였다. 액정 셀의 문턱전압은 1.325V였고, 투과율이 10%일 때 전압은 2.370V를 보여 제작된 액정 셀은 저전압으로 구동됨을 나타내었다. 또한, 액정 셀은 30ms 미만의 응답속도와 80℃/10분간 열을 가한 후에도 안정하게 구동되었다. 구동 시스템은 액정 셀의 인가되는 전압을 0.15V에서 3.53V까지 약 0.5V 간격으로 설계하였고, 실제 인가되는 전압에 따라 액정의 광 투과율이 변화됨을 확인하였다. 이러한 결과는 액정 셀이 스마트 윈도우 응용이 가능성이 있음을 시사한다.

Keywords

References

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