Patent ID: 9048457
Filing Date: 2015-06-02
Classification: G02B,H01L

Abstract:
1. An organic EL display device comprising a substrate, a transparent electrode, a luminescent layer, and a metal electrode layer in this order from a light emission side, the organic EL display device further comprising a circularly polarizing plate disposed on the light emission side of the substrate, the circularly polarizing plate including a polarizing film and a phase difference film that are stacked on each other, wherein the phase difference film includes a layer formed of a resin composition (A) containing a polystyrene-based polymer having a syndiotactic structure and polyarylene ether, a ratio of the polystyrene-based polymer having the syndiotactic structure with respect to the polyarylene ether in the resin composition (A) is 65:35 to 55:45, the ratio being a weight ratio of (the polystyrene-based polymer having the syndiotactic structure) with respect to (the polyarylene ether), the phase difference film satisfies a relation Re an Nz coefficient of the phase difference film at a wavelength of 550 nm is −0.25 to −0.05 (wherein Re 450 , Re 550 , and Re 650 are in-plane direction retardations of the phase difference film at measurement wavelengths of 450 nm, 550 nm, and 650 nm, respectively, the Nz coefficient represents (nx−nz)/(nx−ny), nx represents a refractive index in a direction of an in-plane slow axis of the phase difference film, ny represents a refractive index in a direction of an in-plane fast axis of the phase difference film, and nz represents a refractive index in a thickness direction of the phase difference film).