A 25.3 mu W at 60 fps 240 x 160 Pixel Vision Sensor for Motion Capturing With In-Pixel Nonvolatile Analog Memory Using CAAC-IGZO FET

作者：Ohmaru Takuro; Nakagawa Takashi; Maeda Shuhei; Okamoto Yuki^*; Kozuma Munehiro; Yoneda Seiichi; Inoue Hiroki; Kurokawa Yoshiyuki; Ikeda Takayuki; Ieda Yoshinori; Yamade Naoto; Miyairi Hidekazu; Ikeda Makoto; Yamazaki Shunpei

来源：IEEE Journal of Solid-State Circuits, 2016, 51(9): 2168-2179.

DOI：10.1109/JSSC.2016.2586501

• CAAC-IGZO
• Off-state current
• Vision sensor
• Global shutter
• Differential frame
• Motion capturing

Utilizing a c-axis-aligned crystalline oxide semiconductor-based FET, we have fabricated a vision sensor with in-pixel nonvolatile analog memory. The sensor realized normal image data capturing, captured differential data of a given reference frame, and retained the captured data for an extended time in each pixel. Moreover, the sensor realized normal global shutter image capturing and motion capturing by extracting differential images. This is performed using the captured data and depends on the presence or absence of differences between normal images and reference images. The sensor has three operating modes: an imaging mode, a motion capturing mode, and a wait mode. Importantly, power consumption is reduced by powering off circuit blocks that are in a standby state.

• 出版日期2016-9