Development of "tribo-system vibrating method" for evaluation of rubbing cloth for alignment of liquid crystal molecule

Indication quality of liquid crystal display (LCD) is governed by alignment properties of liquid crystal molecule enclosed in their devices. Therefore , "rubbing process -rubbing on the anchoring surface of liquid crystal with rubbing cloth-", which controls alignment of liquid crystal molecule, has been recognized as an important and base technology in the industrial produ ction of high performance liquid crystal devices. In this paper, new method named "tribo-system vibrating method" for evaluat ion of rubbing cloth properties such as stiffness, filament direction and t heir uniformity, which directly affect the alignment of liquid crystal mole cule, is developed. Furthermore, "Evaluation map of rubbing cloth" construc ted by this new method, which can evaluate uniformity of stiffness and fila ment direction quantitatively, is introduced. The availability of this map as objective and quantitative evaluation method of rubbing cloth for LCD is shown experimentally.