Title

Photostability Of Liquid Crystals And Alignment Layers

Keywords

Alignment layers; Inorganic SiO 2; LCD projector; Lifetime; Liquid crystals; Photostability

Abstract

Photostability of liquid-crystal (LC) materials and surface alignment layers was evaluated using a UV lamp and a blue laser beam. Both organic polyimide (PI) and inorganic silicon-dioxide (SiO2) alignment layers were studied under nitrogen environment. Two commercial TFT-grade LC mixtures (low-birefringence MLC-9200-000 and high-birefringence TL-216) were used for comparisons. Results indicate that SiO2 alignment layers are much more robust than PI layers, and low birefringence LCs are more stable than the high-birefringence ones. At the He-Cd laser wavelength (λ = 442 nm), both LC mixtures and SiO2 alignment layers are hardly damaged. To lengthen the lifetime of an LCD projector, inorganic SiO2 alignment layers, high-optical-density UV filter, long cutoff-wavelength blue filter, and short-conjugation (low birefringence) LC materials should be considered. © Copyright 2005 Society for Information Display.

Publication Date

9-1-2005

Publication Title

Journal of the Society for Information Display

Volume

13

Issue

9

Number of Pages

805-811

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1889/1.2080522

Socpus ID

33745662018 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/33745662018

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