Contact Lens RF Device Using Fluid Medium for Signal Enhancement
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Solution Overview
Problem
Current wireless communication technologies, such as RFID, face size and interference constraints, preventing their integration into contact lenses for vision correction devices, which limits data transfer and range, and lacks wireless charging capabilities.
Innovation Solution
Incorporating a small RF device with an antenna and optional battery onto a contact lens, utilizing a fluid medium to enhance signal transmission and reception, enabling both passive and active RFID communication and wireless charging, allowing for data transfer and notification of lens replacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If RFID technology is integrated into contact lenses, then data transfer capability is improved, but size constraints and interference issues worsen
Solution Approach 1:
The contact lens system is divided into multiple functional components: a biocompatible substrate layer, an RFID antenna layer integrated into the lens, and a fluid medium layer. This segmentation allows each component to be optimized independently - the antenna can be made extremely thin and flexible to fit the lens curvature while maintaining electrical connectivity, and the fluid medium can be specifically formulated to enhance signal transmission without adding bulk to the lens structure.
Solution Approach 2:
A conductive fluid medium is introduced as an intermediary between the RFID antenna in the contact lens and the external reader device. This fluid medium serves multiple functions: it enhances the RFID signal transmission by providing a conductive path, reduces electromagnetic interference by shielding the antenna, and maintains optical clarity. The fluid acts as a mediator that resolves the conflict between achieving reliable data transfer and minimizing interference in the compact lens environment.
2Length of stationary object
If wireless communication components are added to contact lenses, then communication range is improved, but lens size and weight increase
Solution Approach 1:
The RFID system in the contact lens is designed to dynamically adapt its operation mode based on environmental conditions and power availability. The lens can switch between passive RFID mode (no power source, extremely compact) and active RFID mode (with miniaturized power source for extended range). This dynamic capability allows the system to optimize between communication range and size/weight trade-offs depending on the specific application scenario, such as using passive mode for basic identification and active mode for extended-range communication or wireless charging.
3Device complexity
If passive RFID is used in contact lenses, then size is minimized, but communication range and data transfer capability are limited
Solution Approach 1:
The conductive fluid medium serves as an intermediary that amplifies and extends the reach of passive RFID signals. By providing a conductive environment, the fluid medium enhances the electromagnetic field coupling between the lens antenna and external reader, effectively extending the communication range beyond what would be possible in air alone. This allows passive RFID lenses to achieve practical communication distances while maintaining their size advantages.
4Length of stationary object
If active RFID with battery is used in contact lenses, then communication range is improved, but manufacturing complexity and interference increase
Solution Approach 1:
The power source, antenna, and control circuitry are merged into a single integrated RFID module that is deposited or embedded directly onto the contact lens substrate during manufacturing. This integration eliminates the need for separate assembly steps and reduces the number of components that need to be precisely positioned. The merged design also allows for optimized spatial arrangement of components to minimize electromagnetic interference while maintaining compact form factor, addressing both manufacturing complexity and interference concerns.
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
Enables efficient data transfer and wireless charging between the contact lens and an external device, providing user information on lens usage and charging status, while maintaining a compact size and minimizing interference.
Implementation Method 1
utilizing a fluid medium to enhance signal transmission and reception
Data Source
AI summary
The present invention will provide a vision correction device which makes use of wireless transmissions and/or wireless charging to transfer data between the vision correction device and an external device. More specifically, the present invention will incorporate radio frequency technology onto a contact lens, including passive and active embodiments, and may further include wireless charging capability. This is accomplished by positioning an extremely small RF device onto a contact lens, along with an antenna and/or battery, and using a fluid medium to enhance the signal to and from an external device.