A Stimulus-Scattering-Free Pixel-Sharing Sub-Retinal Prosthesis SoC with 35.8dB Dynamic Range Time-Based Photodiode Sensing and Per-Pixel Dynamic Voltage Scaling

📋 论文概要

提出了一种无刺激散射的像素共享亚视网膜假体SoC，采用基于时间的光电二极管传感器，实现了35.8dB动态范围。解决了传统视网膜假体中刺激散射导致图像模糊和像素利用率低的问题。

💡 主要创新点

• 首次提出无刺激散射（Stimulus-Scattering-Free）的像素共享架构，消除了相邻像素间电刺激串扰。
• 采用基于时间的光电二极管传感器（Time-Based Photodiode Sensor）替代传统电压/电流模式，提升动态范围至35.8dB。
• 通过像素共享策略减少芯片面积和功耗，适用于高密度视网膜植入。

🏷 关键词

📄 原文摘要

National University, Cheongju, Korea 4 Korea University Guro Hospital, Seoul, Korea 1 2 Retinal prosthesis (RP) systems-on-chip (SoC) for the treatment of age-related macular degeneration (AMD) and retinal pigment degeneration have been widely studied for restoring visual function. RP SoCs allow the brain to perceive visual information by applying current stimuli to the retinal cells. An epi-retinal prosthesis (epi-RP) obtains image information from an external camera and provides appropriate stimuli to the ganglion cells [1]. On the other hand, a sub-retinal prosthesis (sub-RP) uses photodiodes (PD) to directly recognize light and stimulate bipolar cells [2]. Although the sub-RP SoC has potential to restore the patient’s vision without bulky external devices, it suffers from

👥 作者与机构

Kyeongho Eom1, Minju Park1, Han-Sol Lee1, Seung-Beom Ku1, Namju Kim2,

Seongkwang Cha3, Yong Sook Goo3, Sohee Kim2, Seong-Woo Kim4, Hyung-Min Lee1 Korea University, Seoul, Korea Daegu Gyeongbuk Institute of Science and Technology, Daegu, Korea 3 Chungbuk