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Reflective LCD cell gap measurement by QHQ compensation method

Authors Yu, Xing-Jie
Kwok, Hoi-Sing
Issue Date 2002
Source Society for Information Display International Symposium Digest of Technical Papers , v.33, (2), 2002, p. 680-683
Summary A phase compensation method is presented for measuring the cell gap of reflective LCD. We use the so-called QHQ compensator that is made up of two quarter-wave plates (Q) and one half-wave late (H). This method is different from other compensation methods in that we can change both the orientation angle and retardation value of the compensator by rotating the quarterwave and halfwave retarders. As a result, the QHQ compensation method has a higher accuracy and a simpler procedure.
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Language English
Format Conference paper
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