Azo Dye, Liquid Crystals Polymer Composite Photo-Alignment Layer for Modern Liquid Crystal Displays

摘要

In this article, a photoalignment layer, based on the azo dye and liquid crystal polymer (LCP) composite is proposed. The alignment layer offers easy processing and high photo and thermal stabilities. The high VHR (99.1%) and low RDC (30mV) have been achieved that is comparable with the conventional PI rubbing alignment layer. The proposed alignment layer shows low pre-tilt angle and small image sticking which is highly desirable for IPS display. Furthermore, the ability of multi-domain alignment has been demonstrated that shows a great potential to find applications in a range of electro-optical devices particularly those requiring in-plane LC director modulations.