Projector Parameter Adjustment via Luminance Pattern Matching
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Solution Overview
Problem
Manual adjustment of projectors for optimal imaging effect is inefficient due to low accuracy and operational inconvenience, affecting the final projection quality.
Innovation Solution
A method and device for projection parameter adjustment that involves sequentially displaying predetermined patterns, measuring luminance at specific positions, and adjusting the projector's position or lens angle until the patterns match the theoretical display area, using a display control circuit, luminance acquisition circuit, matching judgment circuit, and control circuit to automate the adjustment process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual adjustment of projector position and parameters is performed, then the installation process is simple and device complexity is low, but the adjustment accuracy is low and productivity is reduced
Solution Approach 1:
The projector system performs self-adjustment by automatically displaying test patterns, detecting luminance at multiple positions, and computing optimal projection parameters without requiring manual intervention. The system uses its own display capability and built-in sensors to autonomously complete the alignment process, eliminating the need for external adjustment tools while achieving high precision.
Solution Approach 2:
The patent replaces manual mechanical adjustment with an automated optical-electrical system. Instead of physically moving the projector or lens by hand, the system uses electronic control to display patterns, optical sensors to detect luminance distribution, and computational algorithms to determine adjustment parameters, thereby substituting mechanical operations with automated sensing and processing.
2Productivity
If manual adjustment of projector is performed, then the operational convenience is poor and time consumption is high, but the device structure remains simple
Solution Approach 1:
The projector system autonomously completes the entire adjustment process by sequentially displaying different test patterns, automatically detecting luminance at multiple screen positions, computing the optimal projection parameters, and adjusting the lens or projector position without requiring operator intervention at each step, thereby dramatically improving adjustment efficiency.
Solution Approach 2:
The system performs preliminary actions by automatically displaying a series of predetermined test patterns (such as concentric circles, grids, or radial lines) before final projection begins. These preliminary pattern displays enable the system to pre-determine the optimal projection parameters, ensuring that when actual projection starts, the alignment is already optimized, thus saving time during operational setup.
3Measurement precision
If automated adjustment with multiple patterns is implemented, then the adjustment accuracy is improved and productivity increases, but the device complexity increases due to multiple circuits
Solution Approach 1:
The projector system integrates multiple functions into a single unified device: it serves as both the projection device and the test pattern display device, uses the same imaging lens for both projection and pattern display, and employs the same sensor system for both normal operation and adjustment detection. This multi-functionality eliminates the need for separate adjustment equipment and reduces overall system complexity despite the sophisticated adjustment capability.
Solution Approach 2:
The patent merges the adjustment detection function with the projection function by using the projector's own display capability to show test patterns and the same optical path to project images. The luminance detection circuits are integrated into the existing projection system, combining multiple functions (pattern display, image projection, luminance detection, parameter computation) into a unified adjustment subsystem that reduces overall device complexity.
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
Improves adjustment accuracy and reduces time by automatically aligning the projector's parameters, ensuring a correct installation position and optimal imaging area, maintaining the adjusted parameters for different projection settings.
Implementation Method 1
measuring luminance of a plurality of predetermined positions in a theoretical display area of the projector in accordance with the predetermined measurement condition
Data Source
AI summary
There is provided a method and device for projection parameter adjustment and a projection apparatus. The method comprises adjusting a projector in accordance with predetermined patterns sequentially, wherein the predetermined patterns correspond to respective projection parameters. For each predetermined pattern, step of adjusting the projector according to the predetermined pattern includes: controlling the projector to display the predetermined pattern in accordance with a predetermined display condition corresponding to the predetermined pattern; measuring luminance of predetermined positions in a theoretical display area of the projector in accordance with the predetermined measurement condition; judging whether the predetermined pattern matches with the theoretical display region in accordance with the luminance; and under the condition the predetermined pattern does not match with the theoretical display area, adjusting the projector and repeating above steps until the predetermined pattern matches with the theoretical display area.