Light Field Display Ray Propagation Control
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Solution Overview
Problem
Current 3D display devices relying on binocular disparity fail to effectively transmit monocular depth perception factors like focus adjustment and motion parallax, resulting in unnatural 3D images and eye fatigue.
Innovation Solution
A light field display device with an optical layer and processor that generates images based on the location relationship between pixels and optical elements, adjusting parameters like slanted angle, pitch, and gap to evenly propagate rays at various viewing distances, allowing for consistent 3D images without limiting viewing locations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If binocular disparity method is used to provide depth effect, then 3D image depth perception is improved, but monocular depth perception factors (focus adjustment and motion parallax) are lost causing eye fatigue
Solution Approach 1:
The patent transitions from 2D display to light field display in 3D space. By generating multiple views from different positions and controlling ray propagation in three-dimensional space, the system provides both binocular disparity and monocular depth cues simultaneously, resolving the contradiction between depth perception and information loss
Solution Approach 2:
The patent divides the viewing space into multiple unit viewpoints and segments the light field into multiple rays originating from different virtual image positions. This segmentation allows independent control of rays for different depth planes, enabling both binocular and monocular depth perception to coexist without interference
2Ease of manufacture
If optical layer parameters are fixed, then device manufacturing is simplified, but viewing location is limited and image quality varies at different distances
Solution Approach 1:
The patent employs optical layers with adjustable parameters including slanted angle, pitch, offset location, and gap between panel and optical layer. These parameters can be tuned to evenly propagate rays to different viewing distances, allowing the same device to adapt to multiple viewing scenarios while maintaining image quality
Solution Approach 2:
The patent introduces dynamic adjustability in optical layer configuration. The optical parameters can be modified based on viewing distance and position, transforming a static display system into a dynamic one that adapts to user needs, thereby expanding viewing location range without complicating manufacturing
3Device complexity
If rays are not evenly propagated, then optical layer design is simpler, but viewing distance is limited and image quality degrades
Solution Approach 1:
The patent incorporates calibration parameters and location relationship information between pixels and optical elements to optimize ray propagation. By using feedback from the actual optical configuration and viewing conditions, the system adjusts image generation to ensure even ray distribution across the viewing area, maintaining consistent image quality without excessive design complexity
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 provides a natural and consistent 3D image experience by evenly distributing rays across a 3D space, reducing eye fatigue and enhancing image quality by eliminating the need for specific viewing positions.
Implementation Method 1
an optical layer configured to generate a light field using a plurality of optical elements
Implementation Method 2
an optical parameter of the optical layer is determined to evenly propagate a plurality of rays included in the light field at a viewing distance
Data Source
AI summary
A display device may include a panel including a plurality of pixels and an optical layer. The display device may include a processor configured to generate an image of the panel based on a location relationship between the pixels and the optical elements so that a plurality of rays corresponding to the image propagate evenly at a viewing distance. The location relationship is based on an optical parameter of the optical layer.