Abstract
A mathematical formula is derived for calculating the fringe period of color moirés appearing at a high dynamic range dual-panel liquid crystal display TV module. It indicates that the fringe period is related to the pixel pattern, the rotational angle, the viewing distance, the medium and the distance between dual panels. The formula is derived in the case of air medium, but has verified to be valid in the case of glass medium for most of the actual situation. In the formula, k indicating the relation between dual panel patterns is introduced. The rule of k value has been derived and listed, making the formula work well for any two pixel pattern. The experiment and simulation have verified the validity of the mathematical formula.
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