1. Department of Information Display, Kyung Hee University, 26, Kyungheedae-ro, Dongdaemoon-gu, Seoul 02447, Republic of Korea
2. Duksan Neolux Co., Ltd., 21-32, Ssukhl-gil, Ipjang-myeon, Seobuk-gu, Cheonan-si, Chungcheongnam-do 331-821, Republic of Korea