Projector Lens Shift via Dynamic Image Region Control
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Solution Overview
Problem
Existing projectors with lens shift mechanisms face challenges in reducing the size of the projector configuration while maintaining the lens shift function, as enlarging the image circle to accommodate the lens shift increases the projector's size and weight.
Innovation Solution
A projector design that includes an image generator with a single liquid crystal panel, a projection system, a lens shift mechanism, and a controller. The controller adjusts the image display to reduce the image light size and display it within a reduced display region that fits within the image circle, allowing for lens shift without increasing the projector's size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the image circle is enlarged to accommodate lens shift, then the lens shift function is improved, but the projector size increases
Solution Approach 1:
The patent applies dynamics by making the image display region adjustable rather than fixed. The controller dynamically changes the display region based on the lens shift position, allowing the system to adapt to different projection scenarios. This enables the use of a smaller, fixed image circle while maintaining lens shift functionality through dynamic region adjustment.
Solution Approach 2:
The patent changes the parameter of the image display region (its size and position) based on the lens shift state. By varying the display region parameters dynamically, the system can accommodate lens shift operations without requiring a permanently enlarged image circle, thus keeping the projector compact.
2Volume of moving object
If the image display region is reduced to fit within the image circle, then the projector size is reduced, but the image quality may deteriorate
Solution Approach 1:
The system dynamically adjusts the image display region based on the lens shift position to ensure that the displayed image remains properly positioned within the image circle. This dynamic adjustment maintains optimal image quality by preventing clipping and distortion while keeping the projector compact.
Solution Approach 2:
The controller monitors the lens shift position and provides feedback to adjust the image display region accordingly. This feedback mechanism ensures that the image remains properly framed within the image circle, maintaining image quality while enabling compact projector design.
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
This design enables a compact, lightweight projector that can shift images effectively while maintaining image quality and aspect ratio, reducing the discomfort caused by changes in image shape during lens shift operations.
Implementation Method 1
a projection system (3) that projects the image light output from the image display panel onto a projection receiving surface
Data Source
AI summary
A projector includes an image generator that includes an image display apparatus having an image display region in which image light is displayed, a projection system that projects the image light output from the image display apparatus onto a projection receiving surface, a lens shift mechanism configured to shift the position of the projection system in a plane perpendicular to the optical axis of the projection system, and a controller that controls the image display apparatus when the lens shift mechanism moves the projection system to display the image light having been reduced in size in a reduced display region that is part of the image display region.