Invention Grant
US09588271B2 Organic EL display element having optical stack 有权
具有光学堆叠的有机EL显示元件

Organic EL display element having optical stack
Abstract:
An organic EL display device includes at least a polarizer layer, a λ/2 plate, a λ/4 plate and an organic EL panel in this order, and an in-plane retardation Re2(550) of the λ/4 plate at 550 nm satisfies 115≦Re2(550)≦155, and an in-plane retardation Re1(550) of the λ/2 plate at 550 nm satisfies Re1(550)=2×Re2(550)±50 nm.
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