Multi-Projector Alignment Using Visible and Invisible Light Sensors
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Solution Overview
Problem
Projector devices face challenges in maintaining image quality and alignment when multiple projectors are used together, leading to distorted images and uneven brightness between overlapping and non-overlapping areas.
Innovation Solution
A projector device system that includes a master projector device with visible and invisible light sensors, a processor, and a slave projector device, which uses visible and invisible light indicators to adjust projection direction and range, ensuring uniform brightness and alignment through homography matrices and grayscale adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If two or more projector devices project images in conjunction, then the display area is expanded, but the brightness uniformity deteriorates due to differences between overlapping and non-overlapping areas
Solution Approach 1:
The patent applies local quality by differentiating the treatment of overlapping and non-overlapping projection areas. The system identifies overlapping regions through sensor detection and applies specific brightness compensation algorithms to these local areas, adjusting the projection parameters differently for overlapping versus non-overlapping zones to achieve uniform overall brightness across the expanded display area.
2Adaptability or versatility
If the positional relationship of projector devices changes, then the system adapts to new configurations, but image distortion occurs
Solution Approach 1:
The patent implements feedback mechanisms using visible and invisible light sensors to continuously monitor the positional relationships between multiple projector devices. The master projector receives feedback from these sensors about the actual positions and orientations of slave projectors, then dynamically adjusts projection parameters including homography matrices to compensate for positional changes and maintain accurate image alignment across the multi-projector display system.
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 effectively reduces brightness differences between overlapping and non-overlapping areas, maintaining image quality and alignment by dynamically adjusting projection parameters based on sensor feedback.
Implementation Method 1
a visible light sensor configured to detect a visible light wavelength band
Implementation Method 2
an invisible light sensor configured to detect an invisible light wavelength band
Data Source
AI summary
The disclosure relates to a projector device and a method for controlling the same. A master projector device according to an embodiment may obtain first sensing information through a visible light sensor, obtain second sensing information through an invisible light sensor, generate a positional relationship with a slave projector device based on the first sensing information and the second sensing information, and control a positional relationship of the slave projector device based on the generated positional relationship and a coordinate value of an invisible indicator identified by the invisible light sensor while projecting an image stored in a memory to a projection surface.