摘要:
The electrode array is a device for making electrical contacts with cellular tissue or organs. The electrode array includes an assembly of electrically conductive electrodes arising from a substrate where the electrodes are hermetically bonded to the substrate. A method of manufacture of an electrode array and associated circuitry is disclosed where the braze preform tab disappears during the braze bonding process and is completely drawn into the substrate feedthrough holes such that the braze perform tab is completely involved in the braze joint and is no longer connecting the adjacent electrodes.
摘要:
A brain implant device includes a housing containing communication and control electronics coupled to a conduit configured for monitoring signals from a brain's motor cortex and providing stimulation signals to the brain's sensory cortex. The brain implant device is capable of wireless communication with an external communication and control signal source by means of an antenna provided in the housing. The conduit is flexible and may contain upwards of 128 electrical conductors providing electrical connections between the device electronics and related sites on the motor and/or sensory cortex by means of a plurality of electrically conductive protuberances extending from the conduit and adapted for contact with such sites.
摘要:
An electronics filter circuit includes an electromechanical resonator that is mounted directly to the surface of a silicon integrated circuit, rather than being a surface mounted or leaded filter can on a circuit board. This filter circuit allows the integrated circuit electronic package to be significantly smaller than a conventional electromechanical resonator package. The electromechanical resonator may be protected during processing and during use with a protective cover that is made of a material such as titanium. The protective cover is attached to the integrated circuit chip.
摘要:
A method and apparatus for improving visual acuity when providing a visual image from a “high” resolution input device to a “low” resolution output device. The described invention is of particular use when the output device is an array of electrodes as part of a retinal prosthesis used to restore vision to a visually-impaired patient. In that various limitations may, within the foreseeable future, limit the density of such an electrode array (and thus the resolution of the output image), the present invention teaches techniques to assign processed pixel subsets of a higher resolution image to a single electrode. By varying the pixel subsets, e.g., by jittering, and/or altering the processing criteria, the perceived visual acuity may be further improved. Alternatively and additionally, such processing may be further extended to drive neighboring electrodes in combination to thus stimulate virtual electrode sites and thus further enhance visual acuity.
摘要:
A method of removing an implantable electronic microdevice by an integral removal loop or circumferential ring to facilitate removal of the implanted microdevice without additional surgery. The device is removed by pulling it along the surgically created implantation path. Optionally a radio-opaque tether provides a method of locating the implantable microdevice without additional surgery and attachment of one end of the tether to a radio-opaque marker provides a method of locating the end of the tether to facilitate removal of the implantable microdevice from living tissue.
摘要:
The present invention is a motion compensation system for a visual prosthesis to adapt a visual image to movement of a user's eyes and head. The system includes a camera providing a video signal, an eye movement tracking device, a head movement tracking device, and a video processing unit processing the video signal and correcting the video signal for eye and head movement. The corrected video signal is sent to an implanted neural stimulator including electrodes stimulating visual neurons to create a perception of the video image.
摘要:
The stimulation device is an improved array for neuro-stimulation. The electrode array of the stimulation device is ideally suited for a visual prosthesis for the restoration of sight in patients with lost or degraded visual function. The electrode array of the stimulation device improves connectivity between a prosthesis and neurons.
摘要:
This invention is for directly modulating a beam of photons onto the retinas of patients who have extreme vision impairment or blindness. Its purpose is to supply enough imaging energy to retinal prosthetics implanted in the eye which operate essentially by having light (external to the eye) activating photoreceptors, or photoelectrical material. The invention provides sufficient light amplification and does it logarithmically. While it has sufficient output light power, the output light level still remains at a safe level. Most preferred embodiments of this invention provide balanced biphasic stimulation with no net charge injection into the eye. Both optical and electronic magnification for the image, as for example, using an optical zoom lens, is incorporated. Otherwise, it would not be feasible to zoom in on items of particular interest or necessity. Without proper adjustment, improper threshold amplitudes would obtain, as well as uncomfortable maximum thresholds. Therefore, to adjust for these, a way of proper adjustment for the threshold amplitudes and maximum comfortable thresholds is provided. Furthermore, to the extent that the individual stimulation sites in the retina give different color perceptions, upon stimulation, then colors of the viewed scene is correlated with specific stimulation sites to provide a certain amount of color vision.
摘要:
A system for monitoring and/or affecting parameters of a patient's body and more particularly to such a system comprised of a system control unit (SCU) and one or more other devices, preferably battery-powered, implanted in the patient's body, i.e., within the envelope defined by the patient's skin. Each such implanted device is configured to be monitored and/or controlled by the SCU via a wireless communication channel. In accordance with the invention, the SCU comprises a programmable unit capable of (1) transmitting commands to at least some of a plurality of implanted devices and (2) receiving data signal from at least some of those implanted devices. In accordance with a preferred embodiment, the system operates in closed loop fashion whereby the commands transmitted by the SCU are dependent, in part, on the content of the data signals received by the SCU.
摘要:
The present invention is a visual color prosthesis. The prosthesis creates the perception of a color image by electrically stimulating visual neurons in patterns consistent with the electrically patterns naturally produced by the retina in response to a color image.