Computation of Liquid Crystal Display Device Parameters Through Image Analysis

Abstract

It has become a challenging problem now a days to select a liquid crystal material best suited for electro-optical display. Image analysis technique in conjunction with polarizing optical microscope is proposed to determine display device optical parameters for homogeneously aligned functional materials on chiral ester liquid crystals ((S)-(-)-2-methylbutyl4-(4-n-alkanoyloxybenzoyloxy) biphenyl-4-carboxylates (where n = 16 and 18)). The textures are recorded as a function of temperature dependence of optical parameters like Luminance, Luminance uniformity, Luminance contrast ratio, Luminance modulation, Gray Shades, Visual Acuity, and Color Saturation that are computed for these functional materials from the series of images recorded texture using MATLAB software. These parameters are useful for the selection liquid crystal material for choosing best electro-optic display devices. This is a new and simple technique computing different optical parameters of functional materials in specific for ferroelectric liquid crystals, without using various instrumental methods. This method of evaluation of optical parameters for various liquid crystal compounds facilitates to identify the selectivity of specific liquid crystal compound suitability to the best of optical display.