Kim Bong Choon, Lim Young Jin, Song Je Hoon, Lee Jun Hee, Jeong Kwang-Un, Lee Joong Hee, Lee Gi-Dong, Lee Seung Hee
Opt Express. 2014 Dec 15;22 Suppl 7:A1725-30. doi: 10.1364/OE.22.0A1725.
We proposed wideband antireflective circular polarizer for realizing a true black state in all viewing directions in organic light-emitting-diode displays (OLEDs). Present commercialized wideband circular polarizer consisted of a half wave and a quarter wave plates having the refractive index parameter (Nz) of 1.5 in both films exhibits light leakage in the oblique viewing directions, deteriorating image quality of a black state. We evaluated Nzs of both films and proposed a new wideband antireflective circular polarizer with a perfect dark state in all viewing directions with Nz = 0.5 in both plates, which will greatly improve image quality of OLEDs.
我们提出了一种宽带抗反射圆偏振器，用于在有机发光二极管显示器（OLED）的所有视角实现真黑状态。目前商业化的宽带圆偏振器由两个薄膜中折射率参数（Nz）均为1.5的半波片和四分之一波片组成，在倾斜视角下会出现漏光现象，从而降低黑态的图像质量。我们评估了两个薄膜的Nz值，并提出了一种新型宽带抗反射圆偏振器，其两个波片中Nz均为0.5，在所有视角下都具有完美的暗态，这将极大地提高OLED的图像质量。
