Imaging Pulse Phase Adjustment With Adaptive Shift Intervals
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Solution Overview
Problem
Existing phase adjustment techniques for digital cameras are cumbersome and lack precision, requiring manual adjustment by technicians and failing to adapt quickly to changes in imaging elements or external conditions like temperature and voltage.
Innovation Solution
A phase adjusting device that automatically adjusts the phase of pulses for imaging elements based on digital signal characteristics, using a characteristic detecting unit and timing adjustment unit to converge to an optimum phase, with a shift interval switching unit for high-speed and fine adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual phase adjustment by technician is performed, then phase precision can be adjusted, but adjustment time is long and productivity is low
Solution Approach 1:
The system performs automatic phase adjustment using the imaging element itself to capture images and the CPU to analyze luminance values and determine optimal phase settings, eliminating the need for manual technician intervention while maintaining high precision
Solution Approach 2:
The system captures test images at different phase settings, analyzes the luminance values of captured images to determine which phase setting produces the best image quality, and automatically adjusts the phase based on this feedback loop
2Measurement precision
If fixed phase shift interval is used, then detection precision can be improved, but adjustment time increases
Solution Approach 1:
The phase adjustment process is divided into two distinct stages: rough adjustment stage with larger phase shift intervals to quickly approach the optimal phase, and fine adjustment stage with smaller phase shift intervals to precisely converge on the optimal phase setting
Solution Approach 2:
The phase shift interval is dynamically changed between stages - using a first (larger) interval during rough adjustment and a second (smaller) interval during fine adjustment, allowing the system to adapt the interval size to the current adjustment needs
3Device complexity
If universal phase adjustment method is applied to all pulses, then device complexity is reduced, but measurement precision decreases
Solution Approach 1:
Different phase adjustment methods are applied to different pulse types based on their specific characteristics - the first method using luminance level detection is applied to peak sample pulses, while the second method using signal variance detection is applied to AD clock signals
4Adaptability or versatility
If phase adjustment is performed for every system change or imaging element replacement, then adaptability is improved, but operation complexity increases
Solution Approach 1:
The system automatically detects when imaging elements are replaced or system changes occur, and autonomously performs the complete phase adjustment process including capturing test images, analyzing luminance values, and determining optimal phase settings without requiring technician intervention
Data Source
AI summary
A characteristic detecting unit detects characteristics of a digital imaged signal at every phase shift interval set in advance. A timing adjustment unit gives a phase adjustment instruction of a pulse so as to converge to an imaging phase in the digital imaged signal at which the characteristics are a predetermined value or within a predetermined range. A shift interval switching unit switches the phase shift interval according to photographing conditions of an imaging element.