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Title: Reflective LCD cell gap measurement by QHQ compensation method
Authors: Yu, Xing-Jie
Kwok, Hoi-Sing
Keywords: Phase compensation
Cell gap
Reflective LCD
Quarter-wave plates
Half-wave plate (H)
QHQ compensation
Issue Date: 2002
Citation: Society for Information Display International Symposium Digest of Technical Papers, v. 33, no. 2, 2002, p. 680-683
Abstract: 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.
Rights: This paper is made available with permission of the Society for Information Display. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.
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