Zhu, X.X.ZhuChoi, W.-K.W.-K.ChoiWu, S.-T.S.-T.WuWING-KIT CHOI2018-09-102018-09-102002http://www.scopus.com/inward/record.url?eid=2-s2.0-0036866014&partnerID=MN8TOARShttp://scholars.lib.ntu.edu.tw/handle/123456789/298245A simple method for measuring the cell gap of a reflective twisted nematic LCDjournal article10.1109/TED.2002.804718