Knowledge about rubbing orientation of LCD liquid crystal screen!

What do you know about the rubbing orientation of LCD screens? On the alignment film, rub the flannelette in one direction to form the alignment layer of the mobile phone LCD liquid crystal screen. The liquid crystal molecules at the alignment layer will be arranged in parallel according to the direction of rubbing, so that a consistent alignment can be obtained. The alignment directions of liquid crystal molecules at the upper and lower plates are 90 degrees to each other, which is the central link in the manufacture of twisted nematic (TN) liquid crystal cells. There are still debates about the principle of rubbing alignment, but one thing is certain, that is, when the liquid crystal molecules are aligned along the rubbing direction, the energy of the system is the lowest, or the liquid crystal molecules at the alignment layer tend to align along the direction with the lowest energy. , this energy is called anchoring energy. As for the microcosmic mechanism of the arrangement direction given by friction, it can be considered from the following two aspects: one is to 'plan' very dense grooves of different depths and widths through friction. The two ends of this kind of groove are different. If we use the analogy of the grater process, one end of the groove is wide and deep, while the other end is narrow and shallow. Such grooves, especially grooves (on the order of nanometers) that are comparable in size to the mobile LCD screen molecules will inevitably affect the alignment of the liquid crystal molecules. Another consideration is the influence of the alignment direction of the organic polymer material of the alignment layer on the alignment of the liquid crystal molecules. LCD liquid crystal screen LCD mobile LCD screen screen manufacturer TFT liquid crystal display'> TFT liquid crystal display

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