Patent
Active retina implant with a multiplicity of pixel elements
Heinz Gerhard Graf,Alexander Dollberg,Bernd Hoefflinger,Wilfried Nisch,Hugo Haemmerle,Alfred Stett,Martin Stelzle,Eberhart Zrenner +7 more
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TLDR
In this paper, an active retina implant has a multiplicity of pixel elements that convert incident light into electric stimulation signals for cells of the retina with which stimulation electrodes are to make contact.Abstract:
An active retina implant has a multiplicity of pixel elements that convert incident light into electric stimulation signals for cells of the retina with which stimulation electrodes are to make contact. Each pixel element is provided with at least one image cell that converts incident light into electric signals, there being provided at least one amplifier whose input is connected to the image cell and whose output is connected to at least one stimulation electrode to which it supplies a stimulation signal. Also provided is an energy supply which provides externally coupled external energy as supply voltage for the image cells and the amplifiers. The image cell has a logarithmic characteristic according to which incident light of specific intensity is converted into electric signals of specific amplitude. The stimulation signal is supplied in the form of analog voltage pulses of specific pulse length and pulse spacings, the pulse amplitude being a function of the intensity of the incident light.read more
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Patent
Multi-phasic microphotodiode retinal implant and adaptive imaging retinal stimulation system
Vincent Y. Chow,Alan Y. Chow +1 more
TL;DR: In this article, an artificial retina device and a method for stimulating and modulating its function is described, which is comprised of plural multi-phasic microphotodiode subunits, which, when surgically implanted into the subretinal space, may allow useful formed articifial vision to develop.
Patent
Artificial retina device
Alan Y. Chow,Vincent Y. Chow +1 more
TL;DR: In this article, a silicon chip device composed of a large array of densely packed microphotodiodes is implanted between the inner and outer retina layers, in patients with vision-deficient eyes suffering from retinal dysfunction, to allow for useful formed vision.
Patent
Electrode array for neural stimulation
TL;DR: In this article, an improved array for neuro-stimulation was proposed for a visual prosthesis for the restoration of sight in patients with lost or degraded visual function, where the electrode array of the stimulation device improves connectivity between a prosthesis and neurons.
Patent
Microelectronic stimulator array
TL;DR: The retinal prosthesis test device is comprised of a thin wafer of glass made from nanochannel glass (NGC) with very small channels perpendicular to the plane of the wafer filled with an electrical conductor forming microwires.
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Image cell for an image-recorder chip, for protection of high input signal dynamics onto reduced output signal dynamics
TL;DR: In this article, an image-recorder chip having a multiplicity of image cells provided with field effect transistors disposed in the form of a two dimensional array and having a readout logic is presented.