+ Site Statistics
+ Search Articles
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ PDF Full Text
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn

+ Translate
+ Recently Requested

Multi-phasic microphotodetector retinal implant with variable voltage and current capability

Multi-phasic microphotodetector retinal implant with variable voltage and current capability

Official Gazette of the United States Patent & Trademark Office Patents 1258(2), May 14

A visible and infrared light powered retinal implant is disclosed that is implanted into the subretinal space for electrically inducing formed vision in the eye. The retinal implant includes a stacked microphotodetector arrangement having an image sensing pixel layer and a voltage and current gain adjustment layer for providing variable voltage and current gain to the implant so as to obtain better low light implant performance than the prior art, and to compensate for high retinal stimulation thresholds present in some retinal diseases. A first light filter is positioned on one of the microphotodetectors in each of the image sensing pixels of the implant, and a second light filter is positioned on the other of the microphotodetectors in the image sensing pixel of the implant, each of the microphotodetectors of the pixel to respond to a different wavelength of light to produce a sensation of darkness utilizing the first wavelength, and a sensation of light using the second wavelength, and a third light filter is positioned on a portion of the voltage and current gain adjustment layer that is exposed to light, to allow adjustment of the implant voltage and current gain of the device by use of a third wavelength of light.

(PDF emailed within 1 workday: $29.90)

Accession: 035349408

Download citation: RISBibTeXText

Related references

Multi-phasic microphotodiode retinal implant and adaptive imaging retinal stimulation system. Official Gazette of the United States Patent & Trademark Office Patents 1246(2), May 8, 2001

Voltage oscillations associated with calcium loading are not caused by a phasic inward current in guinea pig myocytes. Circulation 76(4 PART 2): IV-115, 1987

An On-Chip Multi-Voltage Power Converter With Leakage Current Prevention Using 0.18 μm High-Voltage CMOS Process. IEEE Transactions on Biomedical Circuits and Systems 10(1): 163-174, 2016

A Multi-Ion Strategy towards Rechargeable Sodium-Ion Full Batteries with High Working Voltage and Rate Capability. Angewandte Chemie 57(50): 16370-16374, 2018

Optimal generation rescheduling for meshed AC/HIS grids with multi-terminal voltage source converter high voltage direct current and battery energy storage system. Energy 119: 309-321, 2017

Virtual design of X-ray multi-spectrum CT imaging based on variable voltage. Guang Pu Xue Yu Guang Pu Fen Xi 32(10): 2863-2869, 2013

A programmable discharge circuitry with current limiting capability for a retinal prosthesis. Conference Proceedings 5: 5234-5237, 2007

Linear voltage control of current passed through a micropipette with variable resistance. Medical & Biological Engineering 10(4): 504-509, 1972

Low-power low-voltage current readout circuit for inductively powered implant system. IEEE Transactions on Biomedical Circuits and Systems 4(4): 205-213, 2010

Increasing power and torque capability of brushless direct current motor by employing 150-degree conduction mode controlled three-phase voltage source inverter. Review of Scientific Instruments 89(8): 085002, 2018

Comparison of voltage and current responses of retinal rod photo receptors. Federation Proceedings 39(6): ABSTRACT 2435, 1980

Voltage-gated non-selective ion current in retinal ganglion cells. Society for Neuroscience Abstracts 21(1-3): 1034, 1995

Contrast encoding in retinal bipolar cells: current vs. voltage. Visual Neuroscience 20(1): 19-28, 2003

Comparison of the efficiency of voltage and current pulses for retinal network stimulation. European Biophysics Journal 29(4-5): 356, 2000

Criteria of bistability of the cylindrical dendrite with the variable negative slope of the N-shaped current-voltage membrane characteristic. Biofizika 46(2): 337-340, 2001