| 摘要 |
An IPS (In Plane Switching) mode type liquid crystal display apparatus having polarizing plates on both sides of a liquid crystal cell, wherein the polarizing plate protective film used between a liquid crystal cell and polarizer on a backlight light-source side is a cellulose ester film having a thickness of 20-50μm and a retardation value of 0 nm≰Ro≰2 nm and−5 nm≰Rt≰5 nm, and this cellulose ester film is characterized by temperature variationΔRt(t) lying in the range 0 nm≰ΔRt(t)≰7 nm and humidity variationΔRt(h) lying in the range 0 nm≰ΔRt(h)≰20 nm. |
