1. Information Display Device Laboratory, Department of Electrical and Electronic Engineering, Yonsei University, Seodaemun-gu, Seoul, Republic of Korea
2. ZeSHTech Co., Ltd., Business Incubator, Gwangju Institute of Science and Technology, Buk-gu, Gwangju, Republic of Korea
3. Department of Electricity, Seoil University, Jungnang-gu, Seoul, Republic of Korea