<p class="AbstractText">This research has observed a linear relation of hue value on the surface of a Thermochromic Liquid Crystal (TLC), with variation of temperature, based on statistic value of hue image.  In this research we use ample of TLC with temperature range 25⁰-30⁰C and 30⁰-35⁰C. The original image in RGB format is converted to HSV (hue, saturation, value) and by taking hue without saturation and value, then the hue image is processed using Matlab2013a based on a mathematical morphology with opening and closing for the main process to get better images. The final image of each temperature variation can be distinguished based on the statistic value of each image. The value of max and mean hue increases by increasing temperature for each sample. Both samples tend to have the same linearization based on its mean value.</p>

This work uses surface acoustic waves (SAWs) that are generated by a piezoelectric substrate containing an interdigital transducer (IDT) to which a low voltage of 2 mV was applied at a frequency of 1 kHz to fabricate a polymer-stabilized blue phase liquid crystal (PS-BPLC) layer. The PS-BPLC layer has a more uniform optical microscope (OM) image at a voltage of 2 mV than at zero voltage, and its reflective spectrum exhibits a smaller full width at half maximum (FWHM) at the former than at the latter. The uniform OM image and small FWHM reveal that the lattices in the PS-BPLC layer have monodomain structure. The monodomain PS-BPLC layer is formed because the SAWs cause longitudinal and transverse vibrations of the PS-BPLC lattices in the vertical plane along their traveling direction. The proposed method for fabricating the monodomain PS-BPLC layer using the SAWs has potential for the development of reflective optical devices that consume low power during their fabrication.

An electroconvective pattern called soft-mode turbulence (SMT) of homeotropic alignment in MBBA (4’-Methoxy-benzylidene-4-butyl-aniline) nematic liquid crystal appears when an external electric field with a certain frequency applied on the nematic liquid crystal sample at a threshold voltage (V SMT). The threshold voltage will increase with increasing of frequency. SMT fluctuation occurs when V SMT continues to increase at the same frequency. This phenomenon can be analized by applying an image processing tecnique. Based on image feature extraction method, inhomogeneity of SMT patterns can be observed through contrast, correlation, energy, homogeneity, and entropy parameters. Those parameters represent a result in accordance with the image visualization. Significant changes in the value of contrast, energy, homogeneity, and entropy parameters occur at V> V SMT which fluctuation begin. In this experiment the fluctuation begin at V = 27.3 V.

We have experimentally studied the twist dynamics as a function of temperatures in chiral nematic liquid crystals by applying texture analysis to the image data observed by polarized light microscopy. These microscopic textures are analyzed using MATLAB software. The irregularity of texture at different temperatures observed by statistical parameter such as entropy indicate the changes of director orientation. Moreover, the changes in textural as a function of temperatures are useful to investigate the order parameter values of chiral nematic liquid crystals also to predict the behavior of twist dynamics. The order parameter values of the samples at different temperatures are obtained based on images intensity along twist-line using simple calculation then the behavior of twist dynamics are visualized. The study of dynamics of twist mode chiral nematic liquid crystals is important to observe the electro-optic effect in display technology or other applications.