1. R&D Business Lab, Hyosung Corporation; Anyang 431-080 Republic of Korea
2. Interdisciplinary Program of LED Convergence, Pukyong National University; Busan 608-737 Republic of Korea
3. Department of Display and Science Engineering, Pukyong National University; Busan 608-737 Republic of Korea
4. Department of Graphic Arts and Information Engineering, Pukyong National University; Busan 608-739 Republic of Korea