Quantum Dot Retinal Stimulation via Segmented Infrared Absorption
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Solution Overview
Problem
Current devices for stimulating neural cells, such as those for treating retinal damage, are large and invasive, causing collateral damage and blocking oxygen and light, leading to minimal or transitory functional improvement in vision.
Innovation Solution
The use of quantum dots that absorb infrared radiation to produce electrical energy, which can stimulate cells without the need for large, invasive devices, allowing for less traumatic implantation and minimizing tissue damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If large photovoltaic devices are placed on the retina surface, then electrical stimulation of neural cells is achieved, but light blocking and tissue damage occur
Solution Approach 1:
The patent divides the retinal stimulation function into discrete quantum dot units that can be distributed across the retinal surface. Instead of using a single large photovoltaic device, multiple small quantum dots are applied, each capable of converting light to electrical signals independently. This segmentation eliminates light blocking while maintaining stimulation capability across the entire retinal area.
Solution Approach 2:
The patent replaces the mechanical photovoltaic device structure with quantum dots that directly convert light energy to electrical signals through the photovoltaic effect at the molecular level. This substitution eliminates the need for large-scale mechanical devices, reducing both light blocking and tissue trauma while maintaining electrical stimulation functionality.
2Reliability
If sub-retinal silicon-chip devices are implanted, then electrical response to light is improved, but oxygen delivery is blocked and retinal tissue is damaged
Solution Approach 1:
The patent uses segmented quantum dot units distributed across the retinal surface rather than a single large sub-retinal implant. This distribution allows oxygen to flow freely between and around the quantum dots, eliminating oxygen blocking while maintaining reliable electrical response to light stimulation across the retinal tissue.
Solution Approach 2:
The quantum dots are applied as a thin film or coating on the retinal surface rather than as a bulky sub-retinal implant. This thin-film approach minimizes interference with oxygen diffusion and blood flow while maintaining the electrical stimulation function, thereby reducing tissue damage and improving retinal health.
3Ease of operation
If large devices are attached to the retina, then vision restoration is attempted, but significant light is blocked from reaching rods and cones
Solution Approach 1:
The patent segments the vision restoration function into numerous small quantum dot units distributed across the retinal surface. Each quantum dot is transparent or minimally obstructive to light, allowing maximum light transmission to underlying photoreceptors while collectively providing comprehensive vision restoration coverage across the entire retinal area.
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
Quantum dots provide effective electrical stimulation of neural cells, leading to significant improvements in vision by emitting a photovoltaic response or fluorescence, reducing tissue trauma and maintaining retinal health.
Implementation Method 1
irradiating the composition with electromagnetic radiation comprising infrared radiation, which is absorbed by the quantum dot. The resulting quantum dot produces an electrical energy
Implementation Method 2
the produced electrical energy comprises fluorescence, a photovoltaic response, or a combination thereof
Data Source
AI summary
The present invention provides methods for stimulating cells using quantum dots. In addition, the present invention provides methods for treating a variety of clinical conditions using stimulation of quantum dots to induce cell stimulation and/or function.