| 摘要 |
An organic EL display device including a substrate, a transparent electrode, a luminescent layer, and a metal electrode layer in this order from a light emission side, a circularly polarizing plate disposed on the light emission side of the substrate, the circularly polarizing plate including a polarizing film and phase difference films that stacked on each other. The phase difference film includes a resin composition (A) containing 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, 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 Re450<Re550<Re650, and an Nz coefficient of the phase difference film at a wavelength of 550 nm is −0.25 to −0.05. |
| 主权项 |
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 Re450<Re550<Re650, and an Nz coefficient of the phase difference film at a wavelength of 550 nm is −0.25 to −0.05(wherein Re450, Re550, and Re650 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). |
