Gaze-Aligned Flyback Regions for Gradient-Index Liquid Crystal Lenses
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Solution Overview
Problem
Existing liquid crystal (LC) lenses face challenges in achieving continuous phase retardation across larger apertures due to limited birefringence and mechanically compliant nature, leading to issues like light scattering and optical artifacts.
Innovation Solution
Implementing gradient-index (GRIN) optics with adjustable phase resets and voltage profiles, using variable resistance films and eye-tracking to align phase resets with user gaze, reducing scattering and enhancing clarity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If liquid crystal lenses use larger apertures to improve light transmission and field of view, then more light can pass through and wider viewing is enabled, but light scattering and optical artifacts increase due to limited birefringence and mechanical compliance
Solution Approach 1:
The lens aperture is divided into multiple independent controllable regions or zones. Each region can be independently adjusted via applied voltage to control its refractive index and phase retardation. This segmentation allows the large aperture to be managed as multiple smaller functional units, reducing light scattering at boundaries while maintaining overall large aperture benefits for light transmission and field of view.
Solution Approach 2:
Different regions of the lens are assigned different optical properties through spatially varying voltage application. The refractive index and phase retardation are locally optimized for each region based on its position and function. This local quality control enables the lens to maintain optimal optical performance across the entire large aperture, minimizing scattering and artifacts while maximizing light transmission.
2Area of stationary object
If liquid crystal lenses increase aperture size for better light transmission, then more light passes through, but phase discontinuities and optical artifacts worsen due to mechanical compliance limitations
Solution Approach 1:
The lens employs dynamic voltage control to continuously adjust the refractive index and phase retardation across different regions. This dynamic adjustment capability allows real-time compensation for phase discontinuities and maintains phase continuity throughout the large aperture. The system can adapt to different operating conditions and optimize performance on-the-fly, ensuring reliable optical performance.
Solution Approach 2:
The refractive index and phase retardation parameters are dynamically changed by applying different voltages to different regions of the liquid crystal material. By controlling these parameters spatially and temporally, the system maintains phase continuity across the large aperture while maximizing light transmission. Parameter optimization is achieved through careful voltage profile design and real-time adjustment.
3Object-affected harmful factors
If gradient-index optics with adjustable phase resets are implemented to reduce light scattering, then clarity improves, but device complexity increases due to variable resistance films and control systems
Solution Approach 1:
The system incorporates eye-tracking functionality that automatically detects user gaze and dynamically adjusts the phase reset locations accordingly. This self-service capability eliminates the need for manual calibration or complex external control systems. The lens automatically optimizes its phase profile to minimize scattering in the user's foveal region, reducing perceived complexity while maintaining high clarity.
Solution Approach 2:
The eye-tracking system provides real-time feedback about user gaze position, which is used to dynamically adjust the phase reset locations and voltage profiles. This feedback loop enables the system to automatically adapt to changing viewing conditions and maintain optimal optical performance. The feedback mechanism simplifies control by using natural user behavior (eye movement) as the control input, reducing the need for complex user interfaces.
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 solution dynamically adjusts phase resets to minimize light scattering and improve clarity, maintaining optical power and response time, suitable for augmented and virtual reality systems.
Implementation Method 1
Implementing gradient-index (GRIN) optics with adjustable phase resets and voltage profiles
Implementation Method 2
limited birefringence and mechanically compliant nature
Implementation Method 3
using variable resistance films and eye-tracking to align phase resets with user gaze
Implementation Method 4
A tunable architecture may include a voltage-tunable layer formed over the LC layer(s)
Data Source
AI summary
The disclosed system may include at least one gradient-index liquid crystal lens. The system may include a selection module that selects a viewing angle. The system may also include an adjustment module that dynamically adjusts a phase reset property of the gradient-index liquid crystal lens in response to the selected viewing angle. Various other devices, systems, and methods are also disclosed.