Research On Coatable Optical Films Based On Photoalignment

Photoalignment is a kind of liquid crystal display(LCD)alignment method,which is developed in recent years.Compared with traditional rubbing alignment technology,optical alignment has the characteristics of non-contact,wide range orientation and easy mask,which will gradually replace rubbing alignment technology.However,at present,mature optical alignment materials and technologies are completely monopolized by European Rolic company and DIC company.In order to solve this problem,the research group and VVI Optoelectronic Materials Co.Ltd.jointly developed a new type of optical crosslinking photoalignment material LPPH2003,which has the characteristics of high alignment force,high stability and adjustable pretilt angle.At the same time,in view of the existing coating type OLED with polarizing optical film and nanorods polarization film using azo class orientation materials,in the visible light range it is possible to be rewrote,the application of the new light to match to the material of high stability in the field of optical film,will better improve the light stability of these two kinds of optical film,and achieve effective degree of polarization.Based on the new photoalignment material,this paper systematically analyzes its pretilt angle,anchoring energy,stability and other characteristics,and sets up a test optical path and system.The coating polarizing optical film for reducing the reflection of OLED metal electrode and the nanorod polarizing brightness enhancement film for LCD were made.Finally,in view of the existing optical film structure,an PI-LESS technology based on new optical alignment materials is proposed to simplify the main structure of two types of polarizing optical films,providing a direction for further exploration of technical approaches in the future.