Patent ID: 7557876
Filing Date: 2009-07-07
Classification: C09K,F21K,G02F

Abstract:
1. A backlight system comprising: at least one light source emitting light with an emission spectrum with at least one peak in a wavelength range between 250 and 450 nm, and an anisotropic fluorescent thin crystal film (AF TCF) placed on a light path of the light emitted by the light source, wherein said AF TCF is formed by rodlike supramolecules composed of disc-shaped molecules of at least one polycyclic organic compound which is a product of sulfonation of at least one of the group consisting of Bisbenzimidazo[2,1-b:1′,2′-j]benzo[lmn][3,8]phenanthroline-6,9-dione, and 7H-Benzimidazo[2,1-a]benz[de]isoquinolin-7-one, wherein said rodlike supramolecules has a preferable alignment direction, and emitting polarized visible light when irradiated by light within said wavelength range.