Automated Multiscopic Display Calibration Using Interference Patterns
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Solution Overview
Problem
Calibration of multiscopic displays is a labor-intensive, time-consuming process prone to human error and requires frequent re-calibration due to environmental changes, leading to visual artifacts like crosstalk and incorrect depth perception.
Innovation Solution
An automated calibration system and method that iteratively determines and refines calibration parameters using interference patterns, eliminating manual intervention and ensuring high accuracy and scalability by leveraging software-based corrections and minimal hardware requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual calibration is performed by skilled operators, then alignment between multiscopic optical element and pixel array can be achieved, but the process is time-consuming and labor-intensive
Solution Approach 1:
The patent replaces manual mechanical adjustment with an automated optical measurement system. A camera captures interference patterns generated by the multiscopic display, and image processing algorithms automatically calculate alignment parameters, eliminating the need for manual mechanical adjustment while maintaining high precision.
Solution Approach 2:
The system enables self-calibration by using the display's own interference patterns as measurement signals. The multiscopic display generates interference patterns that are captured and processed to automatically determine alignment parameters, allowing the system to calibrate itself without external manual intervention.
2Measurement precision
If manual calibration is performed, then initial alignment can be achieved, but frequent re-calibration is needed due to thermal expansion and environmental changes
Solution Approach 1:
The patent implements a feedback mechanism where the camera continuously or periodically captures interference patterns, and the system processes these patterns to detect drift in alignment. Based on the processed feedback information, the system can automatically adjust alignment parameters to compensate for thermal expansion and environmental changes, maintaining long-term calibration stability.
3Ease of manufacture
If manual adjustment of multiscopic optical element is performed, then acceptable calibration results can be achieved, but precision required for advanced applications is not met
Solution Approach 1:
The patent replaces imprecise manual mechanical adjustment with an automated optical measurement and calculation system. The camera captures interference patterns with high precision, and image processing algorithms automatically calculate sub-pixel level alignment parameters, achieving manufacturing precision far beyond what manual adjustment can provide while keeping the manufacturing process simple.
4Productivity
If automated calibration system is implemented, then calibration speed and precision are improved, but device complexity increases
Solution Approach 1:
The patent employs a camera, which is a common and versatile device, to serve multiple functions: capturing interference patterns for calibration, measuring alignment parameters, and providing visual feedback. This multi-functional use of a single common component increases calibration speed while minimizing the addition of specialized complex hardware.
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 system provides precise, scalable, and cost-effective real-time calibration, reducing operational complexity and improving the viewing experience by eliminating visual artifacts and ensuring accurate 3D image rendering.
Implementation Method 1
determine a correct pitch of the multiscopic optical element, based on an interference pattern represented in the at least one image
Data Source
AI summary
An optical location of camera(s) relative to a display area of a multiscopic display is detected or retrieved. Another optical location is selected, the another optical location being offset from the optical location of the camera(s) by a given angular interpupillary distance. An estimated pitch of a multiscopic optical element is selected. A first image and a second image are obtained, wherein the first image has first colour(s), and the second image has second colour(s) being different from the first colour(s). A multiscopic image is generated, based on the estimated pitch. The multiscopic image is displayed, whilst capturing image(s) of the display area. A correct pitch of the multiscopic optical element is determined, based on an interference pattern represented in the image(s).