Sungryul Yun received the B.S., M.S., and Ph.D. degrees in mechanical engineering from Inha University, Incheon, South Korea, in 2003, 2005, and 2009, respectively. He was a Postdoctoral Fellow in materials science and engineering with the University of California, Los Angeles, Los Angeles, CA, USA, in 2011. He is currently a Senior Research Scientist with the Electronics and Telecommunications Research Institute, Daejeon, South Korea. His research interests include electroactive polymer for flexible functional devices such as physical/chemical sensor, tactile actuator, and tunable lens.