Novel approach to achieve conventional polyimide-less IPS/FFS LCDs

We propose a novel approach to achieve a homogeneous alignment of nematic liquid crystal (LC). Two bare substrates are rubbed in antiparallel direction and a mixture of LC and reactive mesogen (RM) is filled into the cell using capillary injection, and then UV is exposed after confirming the clear homogenous alignment. The cell shows an excellent dark state and stable electro-optic on/off switching in the IPS cell, which proves polymerized RM on surfaces plays role of alignment layer. Proposed fabrication method has several advantages such as simple process and low cost for IPS cell because alignment layer as well as the coating process is not required.