A 1/4-inch 3.9Mpixel low-power event-driven back-illuminated stacked CMOS image sensor. - Oichi Kumagai; Atsumi Niwa; Katsuhiko Hanzawa; Hidetaka Kato; Shinichiro Futami; Toshio Ohyama; Tsutomu Imoto; Masahiko Nakamizo; Hirotaka Murakami; Tatsuki Nishino; Anas Bostamam; Takahiro Iinuma; et al. (ISSCC, 2018)