Projector Alignment Adjustment via Image Superimposition
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Projectors that combine primary color light fluxes with different wavelengths often experience position misregistration, leading to color misregistration in displayed images, requiring extensive user effort and time to correct uniformly across images.
Innovation Solution
A projector system that includes a light source, light modulation sections, a projection section, a display control section, an accepting section, and an alignment adjustment section, allowing for the superimposition of images to visually recognize position misregistration and accept shift instructions via input screens to determine and apply correction information, enabling easy correction of position misregistration between modulated light fluxes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If users specify points at four corners or arbitrary points on displayed images to correct position misregistration, then color misregistration can be corrected, but the setting requires a large amount of effort and time
Solution Approach 1:
The adjustment process is segmented into two distinct modes: whole-image shift adjustment and partial-image shift adjustment. This allows users to first correct overall misregistration efficiently, then refine specific problematic areas, reducing total adjustment effort while maintaining precision.
Solution Approach 2:
The system provides partial-image shift adjustment that allows users to correct only specific regions with misregistration rather than requiring uniform adjustment across the entire image. This partial action approach reduces the time and effort needed when only certain areas require correction.
2Manufacturing precision
If overall misregistration occurs uniformly among displayed images, then position misregistration can be corrected by shifting the entire image, but uniform correction across all displayed images is difficult to achieve
Solution Approach 1:
The system dynamically adapts the correction approach based on the adjustment mode selected. In whole-image shift mode, the entire image is shifted uniformly; in partial-image shift mode, only specific regions are adjusted. This dynamic adjustment capability simplifies the correction setting process while achieving accurate uniform correction when needed.
Data Source
AI summary
The projector includes alight source, a liquid crystal light valve that modulates first color component light based on a signal, a liquid crystal light valve that modulates second color component light from the light source based on a signal, a projection lens that projects a first image formed by the first color component light and a second image formed by the second color component light, an alignment image display control section that superimposes the first image and the second image on each other and projects the superimposed image to show position misregistration of the second image relative to the first image, an instruction input screen for shifting the second image as a whole, and an alignment adjustment section that determines correction information for correcting the position misregistration based on the shift instruction and corrects the signal based on the determined correction information.