Visual Prosthesis Visor with Integrated Video Processing
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Solution Overview
Problem
Existing visual prostheses are bulky and ineffective in providing adequate simulated vision to the visually impaired, as they are large and cumbersome, and previous attempts at electrical stimulation of the retina have limitations in precision and stability.
Innovation Solution
A compact external visual prosthesis system comprising a visor with a video processing unit integrated behind the temples, connected to a retinal stimulation system via inductive coils, which processes video signals into electrical stimulation patterns for retinal cells, allowing for more precise and stable visual perception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If early prosthetic devices were used for retinal stimulation, then visual perception could be achieved, but the devices were large and bulky
Solution Approach 1:
The device is divided into two main segments: an intraocular implant portion containing electrodes for retinal stimulation, and an external portion containing the video camera and processing unit. This segmentation allows the heavy electronic components to be external while the implant remains minimal and lightweight within the eye
Solution Approach 2:
The patent transitions from external bulky devices to an integrated system where the implant is miniaturized within the ocular dimension, while external components are positioned in spatial dimensions away from the eye (temples, behind ears), effectively distributing the system across multiple spatial dimensions
2Reliability
If early prosthetic devices were used for retinal stimulation, then some visual aid could be provided, but the devices were cumbersome and ineffective
Solution Approach 1:
The patent replaces complex mechanical coupling systems with an electromagnetic coupling mechanism. The external portion uses a coil to generate magnetic fields that inductively couple with a coil in the implant portion, wirelessly transmitting power and data without mechanical connections or cables
Solution Approach 2:
The external coil serves multiple functions: it provides inductive power transmission to the implant, enables bidirectional data communication (telemetry), and can be used for device programming and diagnostics, consolidating multiple functions into a single component
3Measurement precision
If intraocular stimulation is applied to retinal cells, then focused visual perception can be achieved, but precise electrode placement is required
Solution Approach 1:
The patent incorporates a telemetry system that enables bidirectional communication between the external and internal portions. This feedback mechanism allows for real-time monitoring of electrode positioning, stimulation effectiveness, and system performance, enabling adjustments to be made to optimize electrode placement and stimulation parameters
Solution Approach 2:
The patent employs an array of electrodes with independently controllable parameters including polarity, pulse width, amplitude, and timing. By varying these parameters, the system can optimize stimulation patterns for different electrode positions and visual field locations, compensating for placement variations and achieving precise visual perception
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system provides a more stable and effective means of visual stimulation, allowing for improved visual perception and comfort by minimizing device weight on the user's head and optimizing electrode placement for focused stimulation, enhancing the ability to restore vision in individuals with retinal degenerative diseases.
Implementation Method 1
connected to a retinal stimulation system via inductive coils
Implementation Method 2
The general concept of electrical stimulation of retinal cells to produce these flashes of light or phosphenes has been known for quite some time
Data Source
AI summary
The present invention is a new configuration for the external portion of a visual prosthesis in the form of a visor or glasses, including a frame supported by a user's nose and ears. The video processing unit is adapted to be connected by temple portions of the visor and rest on the user's upper back behind the user's neck, or behind the user's head. Controls for the video processor are on one or both temple portions of the visor.