The Japan Society of Applied Physics

2023 International Conference on Solid State Devices and Materials

2023 International Conference on Solid State Devices and Materials

Sep 5, 2023 - Oct 31, 2023
Nagoya Congress Center

9:15 AM - 9:30 AM

[D-5-02] Demonstration of multi-point stimulation with AC-driven CMOS chip for retinal prosthesis

○Yuki Nakanishi1, Wisaroot Sriitsaranusorn1, Yoshinori Sunaga1, Kenzo Shodo2, Yasuo Terasawa2, Hironari Takehara1, Makito Haruta1,3, Hiroyuki Tashiro1,4, Kiyotaka Sasagawa1, Jun Ohta1 (1. Nara Institute of Science and Technology (Japan), 2. Nidek Co. LTD (Japan), 3. Chitose Institute of Science and Technology (Japan), 4. Kyushu Univ. (Japan))

https://doi.org/10.7567/SSDM.2023.D-5-02

In this study, we demonstrate a four-wire control system for a retinal prosthesis consisting of multiple chips. The device consists of seven chips, each of which has seven electrodes and is assigned a unique ID. The period re-quired for setting the stimulation conditions is about 11 ms when all 49 (= 7×7) electrodes are driven sequentially by seven chips in parallel. This result corresponds to 20.5 ms per frame for 1,000 electrodes.