Light-ray modulating element for 3D display vergence-accommodation conflict
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Solution Overview
Problem
Naked-eye 3D displaying devices often cause vergence-accommodation conflict, leading to visual fatigue due to the inconsistency between the vergence distance and the adjustment distance required for stereoscopic vision, resulting in discomfort and dizziness for users.
Innovation Solution
A light-ray modulating element is integrated into a 3D displaying system, which converges light rays from multiple viewpoints to form a single second viewpoint unit that enters a corresponding single-eye pupil simultaneously, alleviating the conflict by optimizing the viewpoint density and depth-of-field range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If naked-eye 3D displaying devices are used to achieve stereoscopic vision, then binocular parallax is generated, but vergence-accommodation conflict occurs causing visual fatigue
Solution Approach 1:
The patent divides the display into multiple viewpoint units, each corresponding to a specific viewing position. By segmenting the optical path into multiple discrete viewpoints, the system enables users to naturally focus at different depths without causing vergence-accommodation conflict, as each viewpoint unit independently manages the optical path for its designated viewing position.
Solution Approach 2:
The patent introduces a new spatial dimension by creating multiple viewpoint units arranged in three-dimensional space. This dimensional transformation allows light rays to be directed to specific viewing positions at different depths, enabling the eye to naturally accommodate at the correct focal plane while maintaining stereoscopic vision, thereby eliminating the conflict between vergence and accommodation.
2Adaptability or versatility
If multiple viewpoints are presented to achieve 3D effect, then stereoscopic vision is improved, but viewpoint density and depth-of-field range become inconsistent
Solution Approach 1:
The patent applies local quality by assigning different optical characteristics to different viewpoint units. Each viewpoint unit is configured with specific optical parameters tailored to its viewing position, ensuring consistent depth-of-field range and viewpoint density across all positions. This localized optimization allows each viewpoint to maintain precise optical properties while contributing to the overall 3D display effect.
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 effectively reduces visual fatigue and improves user experience by ensuring consistent focusing and vergence positions, enhancing the clarity and smoothness of the 3D image display.
Implementation Method 1
the light-ray modulating element is configured for converging light rays emitted by each of the first viewpoint units to form a second viewpoint unit
Implementation Method 2
the liquid-crystal layer is configured for, by effect of an electric field generated by the electrode layer, being capable of modulating a phase of incident light rays
Data Source
AI summary
The present application provides a light-ray modulating element, an eyeglass and a 3D displaying system. The light-ray modulating element is applied to a 3D displaying system, the 3D displaying system includes a 3D displaying device, and the 3D displaying device includes a display panel, and a lens unit disposed at a light exiting side of the display panel; light rays emitted by the display panel pass through the lens unit, are shot to the light-ray modulating element, and form two first viewpoint units at a light entering side of the light-ray modulating element, wherein each of the first viewpoint units includes at least two first viewpoints; and the light-ray modulating element is configured for converging light rays emitted by each of the first viewpoint units to form a second viewpoint unit.