Samsung Display CEO Choi Joo-sun will be relocating as the new chief of Samsung SDI, the battery-making unit said Thursday. Choi has a Ph.D in electrical engineering from the Korea Advanced Institute of Science and Technology. He has served in key positions at Samsung Electronics, including head of DRAM development in the memory division, head of strategic marketing and head of the America for the device solutions division. He later became head of the large display business unit and CEO of Samsu