Projection System Color Convergence Correction via RGB Light Source Adjustment

The patent applies preliminary action by conducting color convergence detection and measurement before the actual projection work. A test pattern with multiple white shape points is projected, and the positions of red, green, and blue color components are measured and recorded in advance. This allows the system to identify convergence errors before they affect the final projection output, enabling preventive correction rather than reactive adjustment.

The patent implements feedback by establishing a closed-loop correction system. The measured color component positions are compared with expected positions, and the deviation is fed back to adjust the projection system parameters. The correction amounts calculated from the feedback are used to adjust the optical path or positioning of the light sources, creating a continuous cycle of measurement-correction-verification that maintains color convergence accuracy.

The patent applies segmentation by dividing the color separation process into distinct, manageable steps. First, the test pattern is projected and captured. Second, the captured image is processed to separately identify the positions of red, green, and blue color components through thresholding and region analysis. Third, the center coordinates of each color component are calculated independently. This segmented approach simplifies the complex task of color separation and makes the measurement process more systematic and reproducible.

The patent uses copying by creating a digital copy of the projected test pattern through image capture. Instead of directly measuring the optical paths or using complex interferometric methods, the system captures an image of the projected pattern and analyzes the color component positions from this digital copy. This copying approach simplifies the measurement process, allows for precise digital analysis, and eliminates the need for complex direct optical measurement equipment.