Patent ID: 8154197
Filing Date: 2012-04-10
Classification: H01L

Abstract:
1. An organic light emitting diode (OLED) display device, comprising: a substrate; a first electrode disposed on the substrate; an organic layer disposed on the first electrode and including an emission layer; a second electrode disposed on the organic layer; and a stack of first, second and third refraction layers being arranged either between the first electrode and the substrate or on the second electrode, the third refraction layer being arranged either between the second refraction layer and the substrate when the stack is arranged between the first electrode and the substrate or arranged on the second refraction layer when the stack is arranged on the second electrode, a refractive index of the first refraction layer being smaller than a refractive index of the second refraction layer, a thickness of the first refraction layer being no greater than 100 nm, a refractive index of the third refraction layer being the same as the refractive index of the first refraction layer, the OLED display device being composed of only three refraction layers.