Illumination Color Control via Image Capture and Spatial Analysis
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Solution Overview
Problem
Current lighting systems face challenges in accurately determining and maintaining the color characteristics of LED light sources due to inaccurate aging patterns and high costs associated with high-resolution imaging and processing requirements, leading to deviations in desired color output.
Innovation Solution
A method and system that utilize an image capturing device to generate images of illumination sources, process them to determine pixel coordinates, and compare these with predefined distances and angles to compute color characteristics, allowing for corrective actions to be taken through control signals to maintain desired color outputs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If high-resolution imaging systems and image processing techniques are used to determine color characteristics, then measurement precision is improved, but device complexity and cost increase
Solution Approach 1:
The patent uses a camera to capture images of the illumination source, creating a visual copy that can be analyzed to determine color characteristics. Instead of using complex spectral measurement devices, the system creates an image copy of the light source and processes it to extract color information, thereby reducing device complexity while maintaining measurement capability
Solution Approach 2:
The patent replaces traditional mechanical/optical color measurement systems with an imaging-based system. By substituting complex colorimetric measurement hardware with a camera and image processing algorithm, the system achieves color characteristic determination with reduced device complexity and lower cost
2Measurement precision
If high-resolution imaging systems are used to determine color characteristics, then measurement precision is improved, but loss of energy increases due to high-speed processing requirements
Solution Approach 1:
The patent applies partial action by processing only the necessary image data to determine color characteristics. Instead of performing exhaustive high-speed processing of entire high-resolution images, the system extracts relevant color information from image regions of interest, reducing computational energy consumption while maintaining measurement precision
3Ease of manufacture
If conventional image processing techniques are used, then ease of manufacture is improved, but measurement precision deteriorates due to inaccuracies in characteristic estimation
Solution Approach 1:
The patent incorporates feedback mechanisms where the captured images are processed and compared against reference color characteristics. The system uses this feedback to adjust and refine color characteristic determination, improving measurement precision while still using conventional, easily manufactured image processing components
Solution Approach 2:
The patent applies preliminary action by pre-processing images to correct for known distortions and variations before color characteristic extraction. By performing preliminary corrections for camera response, lighting conditions, and geometric distortions, the system improves measurement precision using standard image processing techniques that are easy to manufacture and implement
4Productivity
If LED panels are used to generate light over the visible spectrum, then productivity is improved, but reliability deteriorates due to LED aging and color deviation
Solution Approach 1:
The patent enables self-service monitoring where the illumination system itself captures images of its own light output to detect color deviations. By using the system's own resources (camera and processor) to monitor its performance, the system can automatically detect aging effects and maintain reliability without external intervention
Solution Approach 2:
The patent implements feedback control where color characteristics are continuously monitored and compared against target values. When deviations due to LED aging are detected, the system can trigger alerts or adjust operation to maintain color consistency, thereby improving reliability while preserving the high productivity of LED panels
Data Source
AI summary
A method for operating illumination sources includes receiving a first set of images of one or more illumination sources that are generated by an image capturing device. The method further includes computing a first distance and a first perspective angle between the image capturing device and each illumination source during the generation of the first set of images. Furthermore, the method includes generating first characteristic information for each illumination source based on a comparison between at least one of the first distance or the first perspective angle for each illumination source with at least one of a predefined distance or a predefined perspective angle for each illumination source. The method also includes generating a command signal based on a comparison between the first characteristic information and a predefined characteristic threshold for each of the one or more illumination sources.