Calibration Screen with Discrete Light Detection Points
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for calibrating multi-channel projection systems are technically complex, costly, and cumbersome, often requiring manual adjustments and visual inspections to compensate for projector misalignments and distortions, especially when projecting onto curved screens.
Innovation Solution
A display screen equipped with discrete light detection points and associated light detectors allows for precise measurement of image pixels, enabling automatic calibration by correlating brightness and color adjustments, and mechanical adjustments of projector positions to achieve seamless image projection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If camera-based calibration systems are used to measure and compensate projector image positions, then measurement precision is improved, but device complexity and cost increase significantly
Solution Approach 1:
The patent replaces complex camera-based measurement systems with a simplified light sensor array that directly captures projector image positions. The light sensors on the screen surface act as simple detectors that copy the essential position information without requiring complex imaging optics, image processing algorithms, or motorized positioning systems.
Solution Approach 2:
The patent uses inexpensive light sensors integrated directly into the screen surface rather than expensive camera systems. The light sensors are simple, cheap components that can be easily replaced or recalibrated, eliminating the need for costly camera equipment, complex mounting structures, and sophisticated software processing.
2Adaptability or versatility
If manual calibration adjustments are made to compensate for projector misalignments, then adaptability is improved, but productivity and time consumption worsen
Solution Approach 1:
The patent implements automatic feedback-based calibration where light sensors continuously monitor the actual positions of projector images on the screen. The system automatically compares measured positions with target positions and adjusts projector parameters accordingly, eliminating manual trial-and-error calibration while maintaining full adaptability to different projector configurations.
Solution Approach 2:
The calibration system performs self-adjustment by automatically processing light sensor data and computing correction parameters. The system serves itself by autonomously completing the entire calibration process without requiring operator intervention, thereby dramatically increasing productivity while maintaining adaptability to various projector arrangements.
3Measurement precision
If multiple cameras and motorized arms are used for advanced calibration, then measurement precision is improved, but ease of operation deteriorates
Solution Approach 1:
The patent extracts only the essential measurement function from complex camera systems, retaining only the light detection capability while removing all unnecessary components such as camera lenses, image processing units, motorized positioning mechanisms, and complex software. This leaves a simple light sensor array that is easy to operate while maintaining sufficient measurement precision for calibration purposes.
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
The solution simplifies the calibration process, reduces costs, and ensures a continuous, high-resolution image with minimal distortion and seam visibility, even on curved screens, by automatically compensating for projector misalignments and optimizing image processing.
Implementation Method 1
a display screen (3), which is equipped with a plurality of discrete light detection points (4-8) spaced from, on or in the front surface of the screen, or located immediately below the front surface, and where each light detection point or groups thereof are associated with a light detector
Data Source
AI summary
A method and a device for use in calibrating a projector image display towards a display screen, wherein the display screen is equipped with a plurality of discrete light detection points on or in the front surface of the screen, or located immediately below the front surface, wherein each light detection point or groups thereof are associated with a light detector, wherein at least one image is projected towards the display screen, and wherein it is determined which image pixel or pixels of the projected image hit the respective detection point on the screen, and/or wherein brightness and/or colours in the projected image are correlated by comparing measurements at the detection points and relevant projector parameters are adjusted correspondingly.