Projector Dual Distortion Correction for Display and Illumination Modes
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Solution Overview
Problem
Existing projectors cannot perform different types of trapezoidal distortion correction on combined images, limiting their functionality as both display and illumination apparatuses.
Innovation Solution
A projector system with separate distortion correctors for each image type, a combiner to merge corrected images, and a controller to adjust correction differences based on operation mode, allowing for distinct trapezoidal distortion corrections on OSD and background images.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the same trapezoidal distortion correction is performed on both the OSD menu and the image for projection, then the device structure is simple, but different kinds of trapezoidal distortion correction cannot be performed on the two images
Solution Approach 1:
The patent divides the distortion correction function into separate correctors for different image types. Specifically, it provides a first distortion corrector for correcting the background image and a second distortion corrector for correcting the OSD image, allowing each image type to undergo appropriate distortion correction independently.
Solution Approach 2:
The patent applies different distortion correction characteristics to different parts of the system. The first distortion corrector applies correction suitable for the background image (to match illumination target area), while the second distortion corrector applies correction suitable for the OSD menu (for viewability), making each correction locally optimized for its specific image type.
2Adaptability or versatility
If the projector is configured to perform illumination function, then the background image needs to match illumination target area, but the OSD menu still requires strict trapezoidal distortion correction for viewability
Solution Approach 1:
The patent introduces a correction controller that dynamically adjusts the distortion correction parameters based on the operation mode. When the projector operates in illumination mode, the controller configures the first distortion corrector to prioritize matching the illumination target area. When operating in display mode, it configures both correctors to prioritize viewability, making the system adaptable to different operational requirements.
Solution Approach 2:
The patent designs the distortion correction system to serve multiple functions through a single integrated architecture. The same distortion correction system can operate in two modes: display mode for general viewing and illumination mode for highlighting specific areas, allowing the projector to function as both a display apparatus and an illumination apparatus without requiring separate systems.
Data Source
AI summary
A projector includes a first corrector that performs first correction that corrects distortion of an image on first image information to generate first corrected image information, a second corrector that performs second correction that corrects distortion of an image on second image information to generate second corrected image information, a combiner that combines the first corrected image information and the second corrected image information with each other to generate combined image information, and a projection section that projects an image according to the combined image information. The second correction differs from the first correction.