Jeong-Ik Lee received his BS, MS, and PhD in chemistry from the Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Rep. of Korea, in 1992, 1994, and 1997, respectively. After graduating, he joined the IBM Almaden Research Center, San Jose, CA, USA, as a post-doc, where he worked on organic light-emitting materials. He joined ETRI in 1999 and continued his research on OLED materials and devices. He has led the Reality Devices Research Division since 2017 and the Hyper-Reality Metaverse Research Lab. Since 2023 and worked on the OLED and Micro-display for Reality Applications.