Stack Projector Alignment Evaluation via Sequential Capture
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Solution Overview
Problem
In image projection systems, it is difficult to identify and adjust projectors when multiple projectors project images in the same area, as existing methods require pattern images and cannot evaluate if each projector needs adjustment while projecting content.
Innovation Solution
An evaluation method that captures images at different timings, adjusts projector states, and evaluates whether a projector needs adjustment based on these images, ensuring proper alignment and adjustment of projectors in a stack projection system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple projectors project images in the same area simultaneously, then the productivity of the projection system is improved, but it becomes difficult to identify and adjust individual projectors
Solution Approach 1:
The patent divides the projection area into multiple regions, with each projector assigned to a specific region. This spatial segmentation allows individual projectors to be identified and adjusted independently while maintaining simultaneous operation of multiple projectors, resolving the contradiction between system productivity and projector identifiability
Solution Approach 2:
The patent uses color-coded markers or patterns projected by each projector to enable visual identification and differentiation of individual projectors. By assigning distinct color characteristics to each projector's output, the system maintains high productivity while enabling easy detection and measurement of each projector's state
2Measurement precision
If pattern images are projected for adjustment, then the measurement precision of projector alignment is improved, but the loss of time for projection-off states increases
Solution Approach 1:
The patent performs projector alignment and adjustment during the initial setup phase using pattern images, establishing precise spatial relationships before normal content projection begins. This preliminary action ensures high measurement precision is achieved once, eliminating the need for repeated projection-off states during normal operation
Solution Approach 2:
The patent implements continuous monitoring and evaluation of projector states during normal content projection by analyzing image data from cameras or sensors. This allows the system to maintain measurement precision without interrupting the projection workflow, thereby reducing time loss from projection-off states
3Manufacturing precision
If projectors are adjusted frequently to maintain alignment, then the manufacturing precision of image projection is improved, but the productivity of the system deteriorates due to increased projection-off states
Solution Approach 1:
The patent implements a feedback mechanism using cameras or sensors to continuously monitor projector alignment and image quality. The system automatically evaluates whether adjustment is needed based on captured image data, enabling precision maintenance with minimal interruptions to productivity
Solution Approach 2:
The system performs self-diagnosis and self-adjustment of projector alignment by analyzing image data and automatically making corrections when deviations are detected. This self-service capability maintains manufacturing precision without requiring frequent manual interventions that would reduce productivity
Data Source
AI summary
A first image, a second image, and a third image generated by a camera that captures a screen at a first timing, a second timing, and a third timing are sequentially acquired. The projection states of a first projector and a second projector at the third timing are caused to be the same as the projection states of the first and second projectors at the first timing. The projection state of the first projector is caused to differ from the projection state of the second projector at least one of the first timing or the second timing. Whether or not the first projector needs to be adjusted is evaluated based on the first image, the second image, and the third image.