[Paper] Evaluation of Capability to Maintain Thickness of LC layer of Flexible LCDs with Bonding Polymer Spacers

Abstract

We measured the thickness of the LC layer of flexible liquid crystal displays (LCDs) in non-curved and curved states and evaluated a capability to maintain the thickness of the LC layer of flexible LCDs with bonding polymer spacers. We found that both the rigid spacers suppressing a compressive force and the spacers bonding two substrates were required to maintain the thickness of the LC layer of curved LCDs. We developed the composite spacer structure using the columnar photo spacer and the bonding polymer spacer; these maintained a constant thickness of LC layer over the entire liquid crystal cell and will improve the contrast ratio of flexible LCDs even in a small radius of curvature.