Electro-Optic Contact Lens Sensing for Accurate VR/AR Detection
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Solution Overview
Problem
Conventional physiological signal detection devices have insufficient accuracy for use in VR or AR applications.
Innovation Solution
A contact lens device incorporating a hydrogel substrate, conductive elements, an EO crystal element, a light source, light waveguide, light sensor, and processor, which utilize human electric fields to enhance detection accuracy through reflected light signals and RF communication for physiological information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional physiological signal detection devices are used, then device simplicity is maintained, but detection accuracy is insufficient for VR and AR applications
Solution Approach 1:
The patent combines multiple functional components (light source, EO crystal element, light sensor, conductive elements, and processor) into an integrated contact lens device. The light source, EO crystal element, and light sensor are positioned in close proximity within the lens structure, merging detection and communication functions into a single wearable device that maintains high measurement precision while managing complexity through functional integration
Solution Approach 2:
The contact lens device performs multiple functions simultaneously: it detects physiological signals through the EO crystal element's response to human electric fields, transmits data via reflected light signals, and provides power through glucose electrochemical reactions. This multi-functionality approach enables high detection accuracy while consolidating multiple subsystems into one device
2Measurement precision
If integrated components are added to improve detection accuracy, then measurement precision increases, but power supply complexity increases
Solution Approach 1:
The device utilizes glucose electrochemical reactions occurring naturally in the eye to generate electrical power. The conductive elements and processor harness the electrochemical energy from glucose metabolism to supply power to the light source, light sensor, and other components, enabling the device to self-power without external batteries or complex power management circuits
Solution Approach 2:
The patent changes the power supply parameter from conventional batteries to glucose-based electrochemical power generation. By utilizing the electrochemical potential difference created by glucose oxidation, the device transforms a biological parameter (glucose concentration) into electrical energy, simplifying the power supply system while supporting the integrated high-precision detection components
3Measurement precision
If multiple functional components are integrated, then detection capability is enhanced, but manufacturing complexity increases
Solution Approach 1:
The contact lens device is designed with distinct functional segments: the light source layer, the EO crystal element layer, the light sensor layer, and the conductive element layer. Each segment performs a specific function and can be manufactured separately using appropriate techniques, then assembled into the final integrated lens structure, thereby enhancing detection capability while managing manufacturing complexity through modular segmentation
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
Improves detection accuracy and convenience of power supply, reducing circuit complexity and enabling applications in VR and AR environments.
Implementation Method 1
The EO crystal element is affected by a human electric field. The EO crystal element transmits back a reflected light signal according to the incident light signal. The refractive index of the EO crystal element is changed according to the human electric field.
Implementation Method 2
The light waveguide respectively guides the incident light signal and the reflected light signal.
Implementation Method 3
The light sensor receives the reflected light signal from the light waveguide.
Implementation Method 4
If a glucose eye drop falls on the contact lens device, the glucose eye drop will provide electric power for the light source, the light waveguide, the light sensor, and the processor.
Data Source
AI summary
A contact lens device includes a hydrogel substrate, a first conductive element, a second conductive element, an EO (Electro-Optical) crystal element, a light source, a light waveguide, a light sensor, and a processor. The first conductive element is disposed on the hydrogel substrate. The second conductive element is disposed on the hydrogel substrate. The EO crystal element is disposed between the first conductive element and the second conductive element. The EO crystal element is affected by a human electric field. The light source transmits an incident light signal. The EO crystal element transmits back a reflected light signal according to the incident light signal. The light waveguide respectively guides the incident light signal and the reflected light signal. The light sensor receives the reflected light signal from the light waveguide. The processor can obtain the relative information of the human electric field according to the reflected light signal.