LIGHT GUIDE FILM, ULTRA-THIN LIQUID CRYSTAL BACKLIGHT UNIT, AND PORTABLE COMPUTER

摘要

PROBLEM TO BE SOLVED: To provide a light guide film which can contribute to make products thinner and prevent reduction in brightness, and to provide an ultra-thin liquid crystal backlight unit and a portable computer having the same.SOLUTION: A light guide film of the present invention has an average thickness of no more than 600 μm and contains an aromatic polycarbonate-based resin as a main component and 0.01 to 0.1 pt.mass of an anti-oxidant with respect to 100 pts.mass of the aromatic polycarbonate-based resin. The aromatic polycarbonate-based resin has a weight average molecular weight of 2.0×10to 5.0×10, and in terms of polystyrene, a ratio of a weight average molecular weight of the aromatic polycarbonate-based resin to a number average molecular weight of the aromatic polycarbonate-based resin, as measured by gel permeation chromatography is 1.0 to 2.5. The light guide film is formed by an extrusion molding method.