P‐146: Fabrication of Polyimide‐Free Liquid Crystal with Reactive Self‐Aligning Amphiphile Using Three Times UV Curing

Abstract

By introducing reactive self-aligning amphiphile (SA) into nematic liquid crystals (NLC) with three times UV curing, a amulti-domain vertical-alignment LC device was successfully demonstrated. Compared to two times UV curing, the new device achieve almost no drop mura in the absence of conventional polyimides vertical-alignment layers. The key to one more UV curing that SA reactive with RM fabricate a alignment layer can promote alignment capability before electric field applied. The alignment layer was anlayzed by using scanning electron microscopy(SEM).

Vertical Alignment of Liquid Crystal on Sustainable 2,4-Di-tert-butylphenoxymethyl-Substituted Polystyrene Films

“…Polyimide (PI), which has excellent thermal and chemical stability, has a side chain such as a long alkyl group and has been used to implement vertical alignment of LC molecules [ 35 , 36 , 37 ]. However, it is difficult to produce flexible plastic products because the post-baking and washing temperatures required for preparing the alignment layer from the PI derivative are too high [ 38 , 39 ]. Recently, a vertically aligned LC layer using a polystyrene (PS) derivative synthesized through a polymer substitution reaction has attracted much attention in the electro-optical field including flexible displays due to its advantages of excellent optical transparency and low-temperature processability [ 40 , 41 ].…”