Near-Eye Light Field Display Using Angular Channel Segmentation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing 3D display technologies face issues with vergence-accommodation conflict, leading to viewer discomfort such as dizziness, and have limitations in resolution and device size, particularly in near-eye light field displays.
Innovation Solution
A display device comprising a first and second projection assembly, coupling-in modules, a light guide assembly, and a coupling-out light-splitting module, where the image light is coupled into the light guide assembly at preset angles and modulated to enter specific positions in the human eye, avoiding vergence-accommodation conflict and improving resolution through total reflection and diffraction grating elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If integral imaging 3D display technology based on micro-lens array is used, then vergence-accommodation conflict is addressed, but resolution of displayed 3D images is low
Solution Approach 1:
The invention divides the light field into multiple discrete angular channels using a light field prism array, where each prism element directs light at a specific angle to the display screen. This segmentation allows independent control of different viewing angles while maintaining high resolution on the display screen, resolving the contradiction between addressing vergence-accommodation conflict and preserving image resolution.
2Reliability
If multi-focal near-eye 3D display technology using multiple layers of screens is used, then different focal planes are achieved, but device volume is relatively large
Solution Approach 1:
The invention transitions from using multiple physical screen layers (z-dimension stacking) to using angular light field manipulation (theta-space dimension). The light field prism array directs light at different angles to create multiple focal planes, achieving multi-focality without increasing device volume through layer stacking. This dimensional transformation resolves the contradiction between multi-focal capability and compact size.
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 alleviates vergence-accommodation conflict and enhances the resolution of near-eye light field displays while reducing the size of the display device, suitable for applications in augmented reality and virtual reality.
Implementation Method 1
enabling the first image light to propagate in the light guide assembly by total reflection according to a preset first total reflection angle
Implementation Method 2
coupling-out light-splitting module which is configured to couple the first image light propagated in the light guide assembly by total reflection out from the light guide assembly at a first deflection angle
Data Source
AI summary
A display device includes: a first coupling-in module configured to couple first image light into a light guide assembly at a preset first incident angle, thereby enabling the first image light to propagate in the light guide assembly by total reflection and to be incident in a coupling-out light-splitting module; a second coupling-in module configured to couple second image light into the light guide assembly at a preset second incident angle, thereby enabling the second image light to propagate in the light guide assembly and to be incident in the coupling-out light-splitting module; a coupling-out light-splitting module configured to, couple the first and second image light out from the light guide assembly to enter a first position area and a second position area of the human eye, respectively. The first and second image light are different light field information of an identical image; and are both collimated light.