A 37 × 37 pixels artificial retina chip with edge enhancement function for 3-D stacked fully implantable retinal prosthesis

H. Naganuma, K. Kiyoyama, T. Tanaka

Research output: Chapter in Book/Report/Conference proceedingConference contribution

10 Citations (Scopus)

Abstract

To restore visual sensation of blind patients suffering from age-related macular degeneration (AMD) and retinitis pigmentosa (RP), we have been developing a fully implantable retinal prosthesis with three-dimensional (3-D) stacked artificial retina chip. This chip has layered structure similar to human retina and includes such functions as converting incident light into electrical signal, processing visual information, and generating stimulus current pulse. In this paper, we have developed a photoreceptor chip with selectable sensitivity circuit and a stimulus current generator chip with edge enhancement function using four-neighbor Laplacian filter for 3-D staked artificial retina chip. As results, the 37 × 37 pixels photoreceptor chip correctly converted incident light into electrical signal, and the edge enhancement and stimulus current generator chip with edge enhancement function successfully emphasized the edges of input images and generated biphasic stimulus current patterns. By stacking these two chips, artificial retina chip having a pixel number of 37 × 37, a pixel size of 75 × 75 μm2, and the fill-factor more than 27%, will be realized.

Original languageEnglish
Title of host publication2012 IEEE Biomedical Circuits and Systems Conference
Subtitle of host publicationIntelligent Biomedical Electronics and Systems for Better Life and Better Environment, BioCAS 2012 - Conference Publications
Pages212-215
Number of pages4
DOIs
Publication statusPublished - 2012 Dec 1
Event2012 IEEE Biomedical Circuits and Systems Conference: Intelligent Biomedical Electronics and Systems for Better Life and Better Environment, BioCAS 2012 - Hsinchu, Taiwan, Province of China
Duration: 2012 Nov 282012 Nov 30

Publication series

Name2012 IEEE Biomedical Circuits and Systems Conference: Intelligent Biomedical Electronics and Systems for Better Life and Better Environment, BioCAS 2012 - Conference Publications

Other

Other2012 IEEE Biomedical Circuits and Systems Conference: Intelligent Biomedical Electronics and Systems for Better Life and Better Environment, BioCAS 2012
CountryTaiwan, Province of China
CityHsinchu
Period12/11/2812/11/30

ASJC Scopus subject areas

  • Hardware and Architecture
  • Biomedical Engineering

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