Mechanism of Reverse TN-LCD Stabilization by Wall Structure

Abstract

Reverse TN (RTN)-LCDs can realize the driving by low electric voltage. However, RTN-LCDs changes into splay twist structure without applied electric voltage. Conventional stabilization by photo curable LC monomer addition and homogeneous UV light exposure increases the driving voltage. We have reported that the wall structure formation surrounding RTN structure is effective to stabilize it, although the stabilization mechanism has not been clarified yet. By analyzing the UV light exposure distributions using the different kinds of photomasks quantitatively, it was found that to stabilize RTN structure the UV light exposure distribution pattern is important.