IPS LCD device having a wider viewing angle

摘要

An in-plane-switching-mode (IPS) LCD device includes a TFT substrate and a CF substrate sandwiching therebetween an LC layer, and a pair of polarizing films sandwiching therebetween the substrates and the LC layer. Each polarizing film has a polarization layer and a protective layer An optical compensation layer having a birefringence is disposed between the light-emitting-side polarizing film and the CF substrate. The optical compensation layer has an in-plane retardation of N₁ satisfying the following relationship: 83.050-0.810xD₁<=N₁<=-228.090-0.74D₁ in the range of 0<=D₁<=80 mum, wherein D₁ is the thickness of the protective layer of the light-incident-side polarizing film.