Projection Lens and Color Wheel Alignment Control
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Solution Overview
Problem
Existing projection systems with separate optical filters and projection lenses face issues with inappropriate light incidence due to lens movement, leading to image degradation and crosstalk in stereoscopic image display.
Innovation Solution
A projection system with a filter adjuster and adjustment controller that moves and adjusts the optical filter's position and attitude in response to lens movement, ensuring proper light incidence and maintaining the filter's alignment with the projection lens, even during zooming and image shifting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the projection lens is moved to adjust image position and size, then the image projection flexibility is improved, but the light incidence on the optical filter becomes inappropriate
Solution Approach 1:
The optical filter is made movable through the filter adjuster mechanism, allowing it to dynamically follow the projection lens position changes. The filter adjuster includes position adjustment sections that move the optical filter in the first direction (perpendicular to optical axis) and attitude adjustment sections that pivot the filter around axes perpendicular to the optical axis, ensuring continuous appropriate light incidence throughout the lens movement range
Solution Approach 2:
The movement amount detector provides feedback on the projection lens position changes, and the adjustment controller uses this feedback to control the filter adjuster. This closed-loop control system ensures that the optical filter maintains correct alignment with the projection lens by adjusting its position and attitude based on detected lens movement
2Adaptability or versatility
If the optical filter is positioned separately from the projection lens, then the system design flexibility is improved, but the alignment stability deteriorates
Solution Approach 1:
Instead of a fixed separate positioning, the system implements a dynamic coupling between the projection lens and optical filter through the filter adjuster mechanism. The filter adjuster with position adjustment sections and attitude adjustment sections maintains stable alignment relationship throughout the lens movement range, transforming the static alignment problem into a dynamic control problem
Data Source
AI summary
A projection system includes a projector body including a projection lens that projects image light, a color wheel located in a position downstream of the projection lens, a lens moving section that moves the projection lens from an initial position in at least one of an X direction and a Y direction, a movement amount detection unit that detects the amount of movement of the projection lens and the position to which the projection lens has been moved, an adjustment section that changes the position and the attitude of the color wheel, and an adjustment controller that controls the adjustment section in accordance with a detection result from the movement amount detection unit to adjust at least one of the position and the attitude of the color wheel.