Self Aligning Imager Array for Scanning Beam Displays
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Solution Overview
Problem
Current alignment techniques for scanning beam display systems are labor-intensive, costly, and require complex infrastructure, making them inefficient for maintaining image quality across multiple tiles.
Innovation Solution
A scanning beam display system with a control unit that uses reference marks and servo systems to align light engine modules with display screen regions, allowing for precise placement of excitation light and image sub-images across a continuous surface, enabling dynamic adjustment for seamless image production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If camera alignment techniques are used to observe and adjust tiled display alignment, then alignment precision is improved, but device complexity and cost increase due to requiring cameras and support hardware
Solution Approach 1:
The patent extracts the alignment measurement function from complex camera systems and implements it using simple reflective markers and basic optical sensors. Each tile contains reflective markers that can be detected by simple sensors, eliminating the need for expensive camera infrastructure while maintaining alignment measurement capability.
Solution Approach 2:
The patent uses inexpensive reflective markers embedded in each tile instead of expensive camera systems. These markers are simple, cheap components that can be easily manufactured and replaced, providing cost-effective alignment measurement without requiring complex support hardware.
2Measurement precision
If manual alignment procedures are used to adjust tiled display, then alignment precision can be achieved, but productivity decreases due to labor-intensive processes
Solution Approach 1:
The patent implements an automated feedback system where optical sensors detect the positions of reflective markers on each tile, and the control system automatically calculates and applies correction signals to adjust tile alignment. This eliminates manual measurement and adjustment, significantly improving productivity while maintaining precision.
Solution Approach 2:
The system performs self-alignment by automatically detecting marker positions, calculating alignment errors, and adjusting tile positions without human intervention. The automated feedback loop enables the system to correct its own alignment issues, freeing operators from labor-intensive manual adjustment tasks.
3Reliability
If complex alignment infrastructure is deployed to maintain image quality across tiles, then image quality is improved, but cost increases due to expensive hardware and maintenance requirements
Solution Approach 1:
The patent uses reflective markers as simple optical copies or references that can be easily detected. Instead of complex infrastructure, each tile contains standardized marker patterns that serve as alignment references, enabling consistent image quality across tiles through simple, repeatable detection and correction.
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
This method reduces costs and complexity by providing a cost-effective alignment technique that maintains image quality across multiple tiles, allowing for efficient alignment and seamless image production in scanning beam display systems.
Implementation Method 1
detecting servo laser beam feedback light to measure an alignment error
Implementation Method 2
exciting the phosphor material on the display screen
Data Source
AI summary
Implementations described herein generally relate to scanning beam display systems and more specifically, to systems and methods for improved image alignment of such scanning beam display systems. The method comprises providing a display system comprising a display screen having a plurality of display screen region each with a corresponding light engine module having a servo laser beam and an excitation laser beam, scanning the servo laser beam of a light engine module in an outer scanning region outside of the light engine module's corresponding display screen region, detecting servo laser beam feedback light to measure an alignment error of the light engine module relative to the light engine module's corresponding display screen region, and adjusting alignment of the excitation laser beam based on the measured alignment error.