A System Verification Platform for High-Density Epiretinal Prostheses

Retinal prostheses have restored light perception to people worldwide who have poor or no vision as a consequence of retinal degeneration. To advance the quality of visual stimulation for retinal implant recipients, a higher number of stimulation channels is expected in the next generation retinal p...

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Bibliographic Details
Published in:IEEE transactions on biomedical circuits and systems 2013-06, Vol.7 (3), p.326-337
Main Authors: Kuanfu Chen, Yi-Kai Lo, Zhi Yang, Weiland, J., Humayun, M. S., Wentai Liu
Format: Article
Language:English
Subjects:
Algorithms
Arrays
Coils
Computer Simulation
Computers
Differential phase shift keying (DPSK)
Dual band
dual-band telemetry
Electric Stimulation
Electrodes, Implanted
Equipment Design
Feedback
Humans
Image Processing, Computer-Assisted
Light
neural prosthesis
Prosthesis Design
Retina
Retina - pathology
Retinal Degeneration - rehabilitation
retinal prosthesis
Signal Processing, Computer-Assisted
Software
Telemetry
Vision, Ocular - physiology
Visual Prosthesis
Visualization
Wireless communication
wireless power transmission
Wireless Technology
wireless telemetry
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Summary:Retinal prostheses have restored light perception to people worldwide who have poor or no vision as a consequence of retinal degeneration. To advance the quality of visual stimulation for retinal implant recipients, a higher number of stimulation channels is expected in the next generation retinal prostheses, which poses a great challenge to system design and verification. This paper presents a system verification platform dedicated to the development of retinal prostheses. The system includes primary processing, dual-band power and data telemetry, a high-density stimulator array, and two methods for output verification. End-to-end system validation and individual functional block characterization can be achieved with this platform through visual inspection and software analysis. Custom-built software running on the computers also provides a good way for testing new features before they are realized by the ICs. Real-time visual feedbacks through the video displays make it easy to monitor and debug the system. The characterization of the wireless telemetry and the demonstration of the visual display are reported in this paper using a 256-channel retinal prosthetic IC as an example.
ISSN:1932-4545
1940-9990
DOI:10.1109/TBCAS.2012.2200103