New Alignment Method of Liquid-Crystal Moleculas Based on the Geometrical Surface Structure of the Rubbed Substrate.

摩擦法小倾斜垂面对准（THR法）是一种新型对准技术，由于不需要大型设备，因此在获得大面积均匀性和生产率方面具有优势。本项目检验了该方法对显示设备的适用性。倾斜垂直配向最近变得重要，因为它对于正型宾主型LCD和高度复用的ECB型LCD是必需的。蒸发方法之后进行垂面处理给出液晶分子的小倾斜垂面配向，通过蒸发之后进行垂面处理获得，但是该方法需要真空设备。研究者提出了一种新的取向技术，即利用摩擦法（THR）进行小倾斜垂直取向，而不需要蒸发过程。实验结果表明，倾斜取向的机理与基板摩擦表面结构密切相关，观察了取向表面的几何结构，并讨论了其在显示器件中的应用。作为结果，澄清了以下内容。倾斜蒸发法由于需要大的真空设备，在获得大面积均匀性和生产率方面存在不足。而THR方法不需要倾斜蒸发，能够应用于具有无限大面积的显示器。因此，它适合于大面积显示和大规模生产。

A new alignment technique of small tilted homeotropic alignment using rubbing method (THR method) has advantage in obtaining large area uniformity and productivity because of non-requirement of large equipment. This project examined the applicability of this method for display device. Tilted homeotropic alignment becomes important recently because it is necessary for the positive type Guest-Host LCDs and highly multiplexed ECB type LCDs. The evaporation method followed by homeotropic treatment gives small tilted homeotropic alignment of liquid-crystal molecules is obtained by evaporation followed by homeotropic treatment, but the method needs a vacuum equipment. The investigator has proposed a new alignment technique of small tilted homeotropic alignment using rubbing method (THR) method without evaporation processes. The experimental results indicated that the mechanism of the tilted alignment closely related to the rubbed surface structure of the substrate.In the research, the geometrical structure of the alignment surface was observed and its applicability for display device was discussed. As the results, the followings are clarified. The oblique evaporation method has disadvantage in obtaining large area uniformity and producibility because of requirement of large vacuum equipment. The THR method, however, does not need the oblique evaporation and is able to be applied to the display with infinite area. Therefore, it is suitable for large area display and mass-production.