A system verification platform for high-density epiretinal prostheses

Kuanfu Chen, Yi Kai Lo, Zhi Yang, James D. Weiland, Mark S. Humayun, Wentai Liu

Research output: Contribution to journalArticle

20 Scopus citations

Abstract

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.

Original languageEnglish (US)
Article number6231701
Pages (from-to)326-337
Number of pages12
JournalIEEE transactions on biomedical circuits and systems
Volume7
Issue number3
DOIs
StatePublished - Jan 1 2013

Keywords

  • Differential phase shift keying (DPSK)
  • dual-band telemetry
  • electric stimulation
  • neural prosthesis
  • retinal prosthesis
  • visual prosthesis
  • wireless power transmission
  • wireless telemetry

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