High density, high radiance mu LED matrix for optogenetic retinal Prostheses and planar neural stimulation
File(s)
Accepted version
Author(s)
Type
Journal Article
Abstract
Optical neuron stimulation arrays are important for both in-vitro biology and retinal prosthetic biomedical applications. Hence, in this work, we present an 8100 pixel high radiance photonic stimulator. The chip module vertically combines custom made gallium nitride μLEDs with a CMOS application specific integrated circuit. This is designed with active pixels to ensure random access and to allow continuous illumination of all required pixels. The μLEDs have been assembled on the chip using a solder ball flip-chip bonding technique which has allowed for reliable and repeatable manufacture. We have evaluated the performance of the matrix by measuring the different factors including the static, dynamic power consumption, the illumination, and the current consumption by each LED. We show that the power consumption is within a range suitable for portable use. Finally, the thermal behavior of the matrix is monitored and the matrix proved to be thermally stable.
Date Issued
2017-04-01
Date Acceptance
2016-01-13
Citation
IEEE Transactions on Biomedical Circuits and Systems, 2017, 11 (2), pp.347-359
ISSN
1932-4545
Publisher
Institute of Electrical and Electronics Engineers
Start Page
347
End Page
359
Journal / Book Title
IEEE Transactions on Biomedical Circuits and Systems
Volume
11
Issue
2
Copyright Statement
© 2017 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
Identifier
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000398826300010&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
Subjects
Science & Technology
Technology
Engineering, Biomedical
Engineering, Electrical & Electronic
Engineering
ChR-2
GaN LEDs
low power
optogentics
retina
stimulation
mu LEDs
RESTORES VISUAL RESPONSES
EMITTING DIODE-ARRAYS
RETINITIS-PIGMENTOSA
IN-VIVO
PHOTORECEPTORS
DEGENERATION
ELECTRODES
SYSTEM
CELLS
TRIAL
Publication Status
Published
Date Publish Online
2017-02-13