Vibrating Light Field Shaping Layer for Vision Correction
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Solution Overview
Problem
Current light field displays face challenges in providing effective vision correction and image perception adjustments due to resolution trade-offs and associated image artifacts, limiting their commercial viability and user experience.
Innovation Solution
A light field display system incorporating a vibrating light field shaping layer, which includes a digital display and a vibrating light field shaping layer operatively disposed to vibrate relative to the digital display, utilizing a microlens array and an actuator to oscillate the light field shaping layer, synchronizing the optical output with the vibration motion to enhance image perception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional light field displays use lenslet arrays or parallax barriers to correct visual aberrations, then angular resolution is improved, but spatial resolution deteriorates significantly
Solution Approach 1:
The patent applies the dynamics principle by making the light field shaping layer movable rather than static. The layer can oscillate or move dynamically to modulate the light field, allowing the system to achieve both high angular and spatial resolution by temporally multiplexing different spatial configurations. This dynamic approach resolves the static trade-off between angular and spatial resolution.
Solution Approach 2:
The patent employs periodic action through the oscillation or movement of the light field shaping layer. By periodically modulating the light field at frequencies beyond human perception, the system can present multiple spatial resolutions over time, effectively combining them to achieve both high angular and spatial resolution simultaneously through temporal integration.
2Manufacturing precision
If multilayer display designs with prefiltering are used to mitigate resolution trade-offs, then spatial resolution is improved, but image contrast deteriorates significantly
Solution Approach 1:
The patent extracts the prefiltering function from a separate multilayer component and integrates it directly into the light field shaping layer. This consolidation eliminates the need for additional light-blocking layers, thereby maintaining spatial resolution while preserving image contrast by allowing more light to reach the viewer.
Solution Approach 2:
The light field shaping layer is designed to perform multiple functions simultaneously: it shapes the light field for angular resolution, provides spatial resolution through its structure, and maintains contrast by being transparent rather than using opaque filters. This multi-functionality resolves the contradiction between spatial resolution and contrast.
3Adaptability or versatility
If light field displays are designed to provide vision correction, then visual acuity accommodation is improved, but device complexity increases
Solution Approach 1:
The patent merges the vision correction functionality with the display itself by integrating the light field shaping layer directly onto the display surface. This combination eliminates the need for separate corrective lenses or glasses, achieving visual acuity accommodation while minimizing additional device complexity through consolidation.
Solution Approach 2:
The display system provides self-service vision correction by automatically adapting the light field to match the viewer's visual characteristics. The system can detect and compensate for visual aberrations without requiring external corrective devices, thereby improving adaptability while keeping the device self-contained and relatively simple.
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 vibrating light field shaping layer improves perceived resolution and user experience by allowing more pixels to intersect with the viewer's pupils, reducing optical artifacts, and accommodating various visual acuities without the need for corrective eyewear, while also enabling dynamic vision testing and correction.
Implementation Method 1
utilizing a microlens array and an actuator to oscillate the light field shaping layer
Implementation Method 2
a vibrating light field shaping layer operatively disposed to vibrate relative to the digital display
Data Source
AI summary
Described are various embodiments of a light field display and vibrating light field shaping layer therefor, adjusted pixel rendering method therefor, and vision testing and/or correction system and method using same.