Optimisation of alignment materials for minimising residual retardation in in-plane switching liquid crystal display. Issue 3 (19th February 2017)

• Record Type: Journal Article
• Authors: Tae Rim, Lee; Kim, Jin Ho; Jun, Myung Chul; Lee, Seung Hee; Baik, Hong Koo
• Is Part Of: Liquid crystals. Volume 44:Issue 3(2017)
• Page Start: 500
• Page End: 509
• Publication Date: 2017-02-19
• Subjects: In-plane field switching -- alignment layer -- rubbing -- contrast ratio; Liquid crystals -- Periodicals; 548.905
• DOI: 10.1080/02678292.2016.1221152
• Languages: English
• ISSNs: 0267-8292

Abstract

ABSTRACT: The light leakage in a black state of in-plane switching (IPS) liquid crystal display (LCD) associated with rubbing process has been investigated. The mechanical rubbing process with a cloth caused orientation disorders in the liquid crystal directors and these partial orientation disorders result in residual retardations of the IPS LCD, causing the light leakages at the black state. In this study, we theoretically estimated how the light leakage is associated with the rubbing uniformity using 2 × 2 Jones matrix equation and also experimentally confirmed how it is associated with structural properties of the alignment layer. The light leakage was clearly reduced in the alignment layer with reduced crystallinity and flexibility. GRAPHICAL ABSTRACT: