Quasi-Static Brain Communication for Untethered Neural Implants
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Solution Overview
Problem
Current brain-machine interfaces (BMIs) require tethered data transmission and wired power delivery, leading to issues like patient cortical scarring, infection, and increased power requirements that can interfere with physiological signals and stimulate brain tissue, due to inefficiencies in power and data transfer.
Innovation Solution
A wireless communication system utilizing Bi-Phasic Quasi-Static Brain Communication (BP-QBC) that enables efficient power harvesting and data transfer through modulated electro-quasistatic signals, using dipole coupling between implanted and external devices, reducing the need for physical tethers and minimizing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If tethered data transmission and wired power delivery are used, then reliable communication is achieved, but patient cortical scarring, gliosis, infection, and cerebrospinal fluid leakage increase
Solution Approach 1:
The patent replaces mechanical tethers and wired connections with wireless electromagnetic communication for both data transmission and power delivery. The implantable device uses RF or optical wireless communication to transmit data and receive power wirelessly, eliminating the need for physical tethers that cause cortical scarring, gliosis, and infection risks while maintaining reliable communication through optimized wireless protocols and power transfer mechanisms.
Solution Approach 2:
The patent introduces wireless electromagnetic fields as an intermediary medium to transfer both data and power between the implantable device and external systems. This intermediary approach allows communication and power delivery without direct physical contact, reducing the harmful effects of tethers on brain tissue while maintaining system reliability through the electromagnetic coupling mechanism.
2Productivity
If higher transmitter power is used to overcome tissue absorption and skull absorption, then data transmission is achieved, but tissue interference and unintentional brain tissue stimulation increase
Solution Approach 1:
The patent optimizes the frequency, modulation scheme, and power levels of wireless transmissions to achieve reliable data communication while minimizing tissue heating and stimulation effects. By carefully selecting operating parameters such as using lower frequencies that penetrate tissue better and employing efficient modulation techniques, the system maintains productivity without causing harmful tissue interference.
Solution Approach 2:
The patent uses pulsed or periodic transmission patterns instead of continuous high-power transmission. This allows the tissue to recover between pulses, reducing cumulative heating and stimulation effects while still achieving the necessary data throughput through efficient use of transmission windows. The periodic action enables maintaining productivity with lower peak power requirements.
3Ease of operation
If untethered miniaturized wireless neural sensors are used, then patient comfort is improved, but transduction efficiency decreases and device form-factor constraints increase
Solution Approach 1:
The patent designs the implantable device to perform multiple functions within a single integrated platform, including sensing, wireless communication, and wireless power reception. This multi-functionality reduces the need for separate components, improving transduction efficiency while maintaining a compact form-factor that ensures patient comfort. The universal design allows the device to achieve its functions without requiring larger or more complex separate systems.
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 achieves lower power consumption and efficient data transfer, reducing the risk of tissue interference and scarring, while maintaining ion balance and enhancing energy efficiency, allowing for comfortable long-term implantation without the need for surgical maintenance.
Implementation Method 1
The first device may utilize dipole coupling to create an electric field between the first electrode and the second electrode
Implementation Method 2
a data transmitter, a data receiver, and an energy harvester
Data Source
AI summary
A system and method for brain-machine interface communication utilizing Bi-Phasic Quasi-Static Brain Communication (BP-QBC). The system includes a first device and a second device that are in wireless communication together. The system and method include signal transmission between the first device and the second device through dipole coupling. The system is configured to utilize compressive sensing and collision avoidance for enhanced net energy efficiency. The system and method utilize fully electrical quasi-static signaling to militate against energy transduction losses.