[D-1] Micro/Nano Technologies for Biosensing and Interfaces

[D-1-03] Design and Evaluation of Light and Dark Adaptation Functions for High QoL Artificial Vision Chip

〇Kohei Nakamura¹, Yaogan Liang¹, Bang Du¹, Shengwei Wang¹, Yuta Aruga¹, Bunta Inoue¹, Hisashi Kino¹, Takafumi Fukushima¹, Koji Kiyoyama², Tetsu Tanaka¹ (1. Tohoku Univ. (Japan), 2. Nagasaki Inst. of Applied Sci. (Japan))

Presentation style: Online

https://doi.org/10.7567/SSDM.2022.D-1-03

To cope with the increasing number of visually impaired people due to the aging of the population, research on artificial vision, which reconstructs vision using engineering methods, is being actively conducted. To realize the artificial vision with high QOL, it is important to implement the Light and Dark Adaptation (LDA) function, one of the human retinal functions. Although several methods to implement the LDA function have been proposed using electronic circuits, some issues remain regarding function accuracy and circuit area. This study developed an integrated circuit for artificial vision that realizes a small-area appropriate LDA function with high accuracy by introducing a feedback function that changes the sensitivity control signal in steps.