Adjustable Parallax Barrier 3D Display for Dynamic Eye Tracking
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Solution Overview
Problem
Current 3D video display devices using parallax barriers require observers to maintain precise eye positions within predefined 'sweet spots' to experience stereo vision, making it inconvenient and cumbersome for viewers to maintain optimal viewing positions, especially when moving.
Innovation Solution
An adjustable parallax barrier 3D display system that includes a tracking system to monitor the observer's eye locations and a controller to dynamically adjust the parallax barriers, ensuring that left-eye and right-eye images are shielded from the incorrect eye, allowing for continuous stereo vision without resolution reduction during horizontal or vertical movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If parallax barriers are disposed between the observer's eyes and the display to refract lights and enable stereo vision, then stereo vision is generated, but the observer must maintain precise eye positions within predefined sweet spots, making it inconvenient and cumbersome
Solution Approach 1:
The patent applies dynamics by making the parallax barrier adjustable rather than fixed. The barrier can be repositioned horizontally and vertically based on real-time eye tracking data, allowing the system to adapt to different viewing positions and maintain stereo vision quality without requiring the observer to stay within predefined sweet spots
Solution Approach 2:
The patent implements feedback through a tracking system that continuously monitors eye locations and provides real-time information to the controller. The controller uses this feedback to dynamically adjust the parallax barrier position, ensuring optimal light refraction and image separation according to the observer's actual viewing position
2Measurement precision
If fixed parallax barriers are used with predefined sweet spots, then image resolution is maintained, but the observer has to find and maintain specific eye positions, which is inconvenient especially when moving
Solution Approach 1:
The system transitions from a static parallax barrier configuration to a dynamic one that automatically adapts to different viewing positions. The adjustable barrier maintains image resolution by precisely controlling light refraction at the optimal position while providing versatility through automatic adaptation to various viewing scenarios
Solution Approach 2:
The patent changes the parameters of the parallax barrier system by adjusting its position coordinates based on eye tracking data. This allows the system to maintain the critical parameter of light refraction angle for image separation while adapting to different viewing distances and angles, thereby maintaining both resolution and adaptability
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
Enables observers to maintain stereo vision without needing to find or maintain specific eye positions, providing seamless viewing experiences even when moving, while maintaining image resolution.
Implementation Method 1
Parallax barriers 110 are disposed between the locations 102 and 104 and the images 106 and 108 for refracting lights emitted from the images 106 and 108
Data Source
AI summary
A parallax barrier 3D display utilizes adjustable at least one parallax barrier for having an observer always retrieve stereo vision no matter whether horizontal or vertical movements towards the parallax barrier 3D display are made. The parallax barrier is adjustable in its width and a distance from the parallax barrier 3D display, or a parallax barrier having an appropriate width or distance may be chosen from each parallax barrier set. Therefore, the observer does not have to search for sweet spots nor keep on staying at the sweet spots for retrieving stereo vision.