Digital Camera Pulse Phase Adjustment Using Pixel Region Luminance
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Solution Overview
Problem
The increasing speed of driving pulses in digital cameras due to higher pixel counts makes real-time phase adjustment for image capture challenging, especially when environmental changes occur, such as temperature changes, and manual adjustments by engineers are time-consuming and impractical.
Innovation Solution
A phase adjustment device that includes first and second luminance level detectors, data comparators, adjustment judges, and timing adjusters to automatically detect and adjust the phase of pulses based on luminance level differences between adjacent pixel regions, allowing for real-time phase adjustments during image capture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the number of pixels in the imaging element is increased to improve image quality, then the image quality is improved, but the driving pulse speed increases making real-time phase adjustment difficult
Solution Approach 1:
The imaging element is divided into a first pixel region and a second pixel region, allowing independent phase adjustment for each region. This segmentation enables the system to handle high-speed driving pulses by processing phase information from smaller, manageable regions rather than attempting to adjust all pixels simultaneously.
Solution Approach 2:
The phase adjustment is performed in advance during the imaging process by detecting luminance levels and calculating dispersion values from the pixel regions. This preliminary action ensures that phase corrections are ready before they are needed, enabling real-time adjustment even with high-speed driving pulses associated with high pixel counts.
2Measurement precision
If conventional phase adjustment methods are used to maintain accurate phase timing, then phase accuracy is maintained, but the adjustment time exceeds the allowed time range for moving image capture
Solution Approach 1:
The conventional manual or hardware-based phase adjustment mechanism is replaced with an automated system using luminance level detection and dispersion calculation. This substitution eliminates time-consuming manual adjustments and enables rapid, automatic phase correction that fits within the limited time available for moving image capture.
Solution Approach 2:
The system changes the parameter being used for phase adjustment by detecting luminance levels and calculating dispersion values from pixel regions, rather than using traditional methods. This parameter change enables faster adjustment computation while maintaining phase accuracy, reducing the adjustment time to within the allowed range for moving image capture.
3Measurement precision
If manual phase adjustment by engineers is performed to account for manufacturing variability, then phase optimization is achieved, but the process becomes complex and imaging element replacement is difficult
Solution Approach 1:
The system performs self-adjustment by automatically detecting luminance levels and calculating dispersion values from the pixel regions to determine optimal phase timing. This self-service capability eliminates the need for manual engineer intervention, simplifying the adjustment process and enabling easy imaging element replacement without requiring complex manual recalibration procedures.
Data Source
AI summary
In a phase adjustment device according to the present invention, a first luminance level detector detects a luminance level of a digital imaging signal in a first pixel region, a second luminance level detector detects a luminance level of the digital imaging signal in a second pixel region, a data comparator compares detection results by the first and second luminance level detectors, an adjustment judger judges if it is necessary to adjust a phase of a pulse based on a result of the comparison by the data comparator, a timing adjuster shifts the phase of the pulse in the second pixel region when the luminance levels are detected, and further, the timing adjuster adjusts the phase of the pulse when the judgment by the adjustment judger indicates that the phase adjustment is necessary.