Lightweight Visual Display System for Reducing Observer Fatigue
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Solution Overview
Problem
Current 3D HMD technologies face limitations in providing low-cost, high-accuracy visual displays with full accommodation, comfort, and ergonomic design, especially in miniature forms, due to issues with wavefront-based technologies and the inability to properly display solid 3D pixels orthogonal to the scanning plane, leading to observer fatigue and chromatic aberrations.
Innovation Solution
The development of an integrated method and device for creating, editing, and displaying augmented and virtual reality environments with advanced monitoring of physiological and psychological responses, utilizing nanotechnology-embedded displays with adjustable illumination and compact, lightweight optical components that enable stereoscopic and light field displays without intermediate image planes, and wavefront curvature constraints, allowing for comfortable and accurate 3D pixel presentation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If wavefront-based technologies (digital phase and diffractive holography) are used for high-resolution display, then resolution is improved, but coherent effects cause specular and other aberrations that degrade performance and induce observer fatigue
Solution Approach 1:
The patent changes the fundamental display parameter from wavefront-based coherent light modulation to incoherent light field modulation using micro-LED arrays. This parameter change eliminates coherent effects and their associated aberrations while maintaining high resolution through spatial multiplexing of light sources.
Solution Approach 2:
The patent replaces the optical wavefront modulation mechanism with a direct light field synthesis approach using arrays of micro-LEDs. This substitution eliminates the need for complex wavefront control and removes the source of coherent aberrations entirely.
2Extent of automation
If sequentially resonant or programmed variable focal length optics with scanning configurations are used, then dynamic focus control is improved, but the inability to properly display solid three dimensional pixels orthogonal to the scanning plane limits 3D accuracy
Solution Approach 1:
The patent adds a spatial dimension to pixel display by using multiple light sources positioned at different depths along the optical axis. This enables solid 3D pixels to be displayed orthogonal to the scanning plane through volumetric light field synthesis rather than planar scanning.
Solution Approach 2:
The patent segments the light source into multiple independent micro-LED elements positioned at different focal planes. This segmentation allows each element to contribute to a specific depth plane, enabling accurate 3D pixel formation without requiring variable focal length optics.
3Weight of moving object
If miniature displays are miniaturized and incorporated into eyeglasses design, then portability and wearability are improved, but chromatic aberrations and limited accommodation data remain significant problems
Solution Approach 1:
The patent extracts the accommodation information from indirect wavefront analysis and provides it directly through the light field geometry. By encoding depth information in the spatial distribution of light sources, the system provides full accommodation data without requiring complex wavefront sensing or correction mechanisms.
Solution Approach 2:
The patent uses simple micro-LED elements instead of complex wavefront modulators or variable focal length optics. These inexpensive, simple light sources eliminate chromatic aberrations inherent in lens-based systems while providing sufficient accommodation information through their spatial arrangement.
Data Source
AI summary
A transformative, collapsible, portable and versatile personal display system is disclosed having a compact, lightweight collapsible structure enabling applications from eyeglass form virtual, augmented, mixed or experimental reality to a comfortable, portable wristwatch form.