Multi-Plane Image Display Optics for Vergence-Accommodation Conflict
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional augmented reality and virtual reality displays cause vergence accommodation conflict due to the use of binocular parallax, leading to dizziness and nausea in users as they fail to provide distinct focusing planes for near and distant objects, conflicting the physiological reactions of eyeball vergence and accommodation.
Innovation Solution
An image display device with a first optical element, microlens arrays, and a second optical element that focuses image beams on multiple planes to create multiple light point arrays, allowing the human eye to adjust focus and perceive depth based on accommodation information, reducing vergence accommodation conflict.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If binocular parallax is used to create three-dimensional sense, then vergence response is satisfied, but accommodation function conflicts causing dizziness and nausea
Solution Approach 1:
The patent segments the focusing function into multiple independent optical paths, each with its own focusing plane. The light guide plate is divided into multiple regions, each coupled with micro-lens arrays that direct light to different virtual image distances, allowing simultaneous presentation of multiple focal planes to resolve the accommodation-vergence conflict
Solution Approach 2:
The patent adds the accommodation dimension to the traditional vergence-based 3D display. By introducing multiple focusing planes at different depths (front, middle, rear virtual images), the system creates a multi-layered depth space that engages both vergence and accommodation physiological responses, transforming the single-plane 2D display into a multi-plane 3D experience
2Device complexity
If a single focusing plane is used in the image, then device complexity is reduced, but depth perception and accommodation function are compromised
Solution Approach 1:
The light guide plate serves multiple functions simultaneously: it acts as a waveguide for light transmission, a beam splitter for creating multiple virtual images, and a focusing element through integrated micro-lens arrays. This multi-functionality allows the system to achieve complex multi-plane focusing without proportionally increasing overall device complexity
Solution Approach 2:
The patent merges the light guiding function and the focusing function into a single integrated light guide plate structure. The micro-lens arrays are embedded within or coupled to the light guide plate, combining what would traditionally be separate optical components into one unified element, thereby managing complexity while achieving multi-plane depth
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 device enhances the perception of depth by aligning eyeball accommodation with vergence, reducing discomfort and providing a more integrated virtual and real experience.
Implementation Method 1
The first optical element receives a display image and generates a plurality of image beams parallel to each other
Implementation Method 2
The microlens arrays respectively receive the image beams, deflect the image beams to generate a plurality of first light beams, and focuses the first light beams on a first focusing plane
Implementation Method 3
The microlens arrays respectively receive the image beams, deflect the image beams to generate a plurality of first light beams, and focuses the first light beams on a first focusing plane
Implementation Method 4
The second optical element is disposed between the first focusing plane and a target area, receives the first light beams, deflects the first light beams to generate a plurality of second light beams, focuses the second light beams on a second focusing plane
Implementation Method 5
The second optical element is disposed between the first focusing plane and a target area, receives the first light beams, deflects the first light beams to generate a plurality of second light beams, focuses the second light beams on a second focusing plane
Data Source
AI summary
An image display device including a first optical element, multiple microlens arrays and a second optical element is provided. The first optical element receives a display image and generates multiple image beams parallel to each other. The microlens arrays respectively receive the image beams, deflect the image beams to generate multiple first light beams, and focuses the first light beams on a first focusing plane. The second optical element is disposed between the first focusing plane and a target area, receives the first light beams, deflects the first light beams to generate multiple second light beams, focuses the second light beams on a second focusing plane, and projects the second light beams to focus on the target area.