| Project/Area Number |
15H01812
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Medical systems
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| Research Institution | Tohoku University |
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Principal Investigator |
TANAKA Tetsu 東北大学, 医工学研究科, 教授 (40417382)
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| Co-Investigator(Kenkyū-buntansha) |
福島 誉史 東北大学, 工学研究科, 准教授 (10374969)
富田 浩史 岩手大学, 理工学部, 教授 (40302088)
清山 浩司 長崎総合科学大学, 工学部, 准教授 (60412722)
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| Co-Investigator(Renkei-kenkyūsha) |
KOYANAGI Mitsumasa 東北大学, 未来科学技術共同研究センター, 名誉教授 (60205531)
SUGANO Eriko 岩手大学, 理工学部, 准教授 (70375210)
KINO Hisashi 東北大学, 学際科学フロンティア研究所, 助教 (10633406)
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| Project Period (FY) |
2015-04-01 – 2018-03-31
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| Project Status |
Completed (Fiscal Year 2017)
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| Budget Amount *help |
¥39,000,000 (Direct Cost: ¥30,000,000、Indirect Cost: ¥9,000,000)
Fiscal Year 2017: ¥11,310,000 (Direct Cost: ¥8,700,000、Indirect Cost: ¥2,610,000)
Fiscal Year 2016: ¥12,090,000 (Direct Cost: ¥9,300,000、Indirect Cost: ¥2,790,000)
Fiscal Year 2015: ¥15,600,000 (Direct Cost: ¥12,000,000、Indirect Cost: ¥3,600,000)
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| Keywords | 人工網膜 / 三次元集積回路 / 医用システム / 生体医工学 / 人工視覚 / 人間医工学 |
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| Outline of Final Research Achievements |
In order to restore visual sensation of blind patients such as age-related macular degeneration and retinitis pigmentosa, a fully-implantable retinal prosthesis have been developed in this research. The fully implantable retinal prosthesis consists of an intraocular and extraocular units. The intraocular unit has a coupling coil, a stimulus electrode array, and a 3-D stacked retinal prosthesis chip. The 3-D stacked retinal prosthesis chip is composed of a photoreceptor chip and a stimulus current generator chip. In this research, power dissipation of the stimulus current generator chip with an edge enhancement function successfully decreased to 62% due to no idling function. Other functions such as dark current compensation and temperature compensation were implemented into the circuit. A transparent stimulus electrode using Al-doped ZnO was successfully developed and showed appropriate CIC and electrical impedance values, which leads to x3 photoelectric conversion performance.
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