Multi-Projector Blending Brightness Uniformity Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In projection systems using multiple projectors, the brightness of the overlap region is often higher than the non-overlap region due to light leakage, leading to uneven image brightness and reduced projection quality, especially when projecting black images, making it difficult to adjust the overlap region effectively.
Innovation Solution
A system and method that includes two projectors with control modules capable of displaying an image adjustment interface, allowing users to select and adjust adjustment points and connecting lines to form a closed region within the non-overlap area, enabling precise brightness adjustment of the non-overlap region to match the overlap region's brightness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple projectors perform blending projection, then the projection coverage area is increased, but the brightness uniformity deteriorates due to overlap region brightness being higher than non-overlap region
Solution Approach 1:
The patent applies local quality by differentiating brightness adjustment for different regions of the projection image. Specifically, the system identifies overlap regions versus non-overlap regions and applies different brightness compensation strategies to each, ensuring that the overlap region's enhanced brightness does not create unwanted hotspots while maintaining overall brightness uniformity across the entire projection surface.
Solution Approach 2:
The patent employs parameter changes by dynamically adjusting the brightness parameter of projection images based on regional characteristics. The control module modifies gamma correction parameters and brightness levels specifically for overlap regions versus non-overlap regions, transforming the fixed brightness output into a variable brightness output that compensates for the additive effect in overlapping areas.
2Measurement precision
If adjustment points and connecting lines are used to form closed regions for brightness adjustment, then the brightness adjustment precision is improved, but the device complexity increases
Solution Approach 1:
The patent applies self-service by enabling the system to automatically generate and process the adjustment points and connecting lines without requiring complex external control equipment. The control module within the projection system itself performs the region segmentation and brightness adjustment calculations, making the system self-sufficient and avoiding additional complex external devices.
Solution Approach 2:
The patent employs segmentation by dividing the projection image into distinct regions (overlap and non-overlap regions) using adjustment points and connecting lines. This segmentation allows independent brightness control for each region, achieving precise local brightness adjustment while keeping the control mechanism relatively simple through automated region detection and boundary definition.
Data Source
AI summary
A projection system and a projection method are provided. The projection system includes a first projector and a second projector. A first projection image projected by the first projector and a second projection image projected by the second projector are partially overlapped. A projection region edit menu is executed to display multiple adjustment points and multiple connecting lines on the first projection image. A position of a selected adjustment point among the multiple adjustment points and positions of two connecting lines connected to the selected adjustment point among the multiple adjustment points displayed on the first projection image are changed according to a first moving instruction to select a closed region formed by the multiple connecting lines in a non-overlap region of the first projection image. The projection method is adapted to the projection system that provides a blending projection effect of multiple projectors having an even brightness.