Analysis and prediction of Moir acute accent e pattern on metal mesh touch screen based on two dimensional Fourier transformation

This paper presents a novel algorithm to analyze and judge the visibility of Moire ' appearing on metal mesh touch screen whose resolution is 2 K from spatial frequency domain by using Fourier transformation. In this method, we utilize the characteristic spatial frequency to represent the visibility of Moire ', and two-dimensional Fourier transformation is performed on the simulation image obtained by calculating the pixel transmittance. The characteristic frequency is obtained by frequency filtering, and the Moire ' visibility is evaluated according to it. In this paper, three different displays are used for experiments, 1.89 lp/mm, 1.94 lp/mm and 1.85 lp/mm are taken respectively as the dividing line to classify the performance of Moire '. The matching ratios of the three displays are 84.47%, 82.30% and 80.12% respectively, showing pretty high accuracy with the practical matching result. This new method may be quite useful for guiding the manufacture of metal mesh touch panel.