Fast response time of liquid crystal display modes using band separation UV exposure method. (24th March 2017)

• Record Type: Journal Article
• Authors: Mun, Byung-June; Baek, Ji-Ho; Kim, Byeong Koo; Choi, Hyun Chul; Kang, Bongsoon; Lee, Gi-Dong
• Is Part Of: Molecular crystals and liquid crystals. Volume 646(2017)
• Page Start: 81
• Page End: 87
• Publication Date: 2017-03-24
• Subjects: Surface anchoring energy -- in-plane switching -- twisted nematic -- reactive mesogen -- response time -- photoalignment; Molecular crystals -- Periodicals; Liquid crystals -- Periodicals; Liquid crystals; Molecular crystals; Periodicals; 548
• DOI: 10.1080/15421406.2017.1284483
• Languages: English
• ISSNs: 1542-1406

Abstract

ABSTRACT: We propose a double frequency ultraviolet (UV) exposure process that can improve the surface anchoring energy of photopolyimide (PI) embedded with reactive mesogens (RMs) for the high speed liquid crystal modes. In experiment, we polymerize the RM materials using long wavelength UV light over 340 nm, and then accomplish the polymerization of the UV alignment layer using short UV light between 254 nm and 340 nm. As results, we demonstrate the improved surface anchoring energy and the fast response time of an in-plane switching (IPS) and a twisted nematic (TN) LC modes in this paper.