Endoscope Signal Synchronization During Frame Rate Switching
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Solution Overview
Problem
Existing endoscope systems face complexity and disruption of abnormality detection functions when switching between different image pickup drive methods, such as normal and high frame rate modes, due to the temporary stoppage of synchronization signals during method changes.
Innovation Solution
The system employs a dummy signal generation and identification process to maintain synchronization and abnormality detection during image pickup drive method changes, ensuring seamless transitions without disabling these critical functions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the image pickup drive method is changed by stopping the synchronization signal, then the frame rate can be switched between normal and high frame rate modes, but the abnormality detection function is disabled and the system becomes complicated
Solution Approach 1:
A dummy synchronization signal is introduced as an intermediary during frame rate switching. Instead of completely stopping the synchronization signal when changing from normal to high frame rate mode, the dummy signal maintains the signal flow and enables the abnormality detection function to continue operating, while still allowing the frame rate transition to occur.
Solution Approach 2:
The system changes the parameters of the synchronization signal rather than stopping it entirely. By modifying the synchronization signal into a dummy signal with different characteristics during the transition period, the system maintains signal continuity for detection purposes while enabling frame rate switching functionality.
2Adaptability or versatility
If the abnormality detection function is disabled during frame rate switching, then the switching can be performed, but the detection capability is lost and additional enabling processing is required
Solution Approach 1:
The dummy synchronization signal serves as a mediator that allows the abnormality detection function to remain active during frame rate switching. The detection function continues to monitor the dummy signal, maintaining reliability throughout the transition process without requiring disabling and re-enabling operations.
Solution Approach 2:
The abnormality detection function maintains continuous operation during frame rate switching by monitoring the dummy synchronization signal. This ensures uninterrupted detection capability throughout the transition, eliminating the need to stop and restart the detection function.
3Adaptability or versatility
If the synchronization signal is stopped temporarily during method change, then the image pickup sensor can switch drive methods, but the switching time increases and system becomes more complex
Solution Approach 1:
The dummy synchronization signal acts as a transitional intermediary that allows the image pickup sensor to change drive methods without completely interrupting the signal flow. This reduces the temporary stoppage duration compared to fully stopping and restarting the synchronization signal.
Solution Approach 2:
The dummy synchronization signal is prepared and introduced in advance during the switching process, allowing the system to transition smoothly between frame rates without unexpected interruptions or delays in the signal flow.
Data Source
AI summary
A scope logic circuit outputs, to a processor device, a synchronization signal and a frame signal which is output from the image pickup sensor through image pickup of an object to be observed, in a case where the image pickup drive method is not changed. The scope logic circuit outputs, to the processor device, a synchronization signal and a dummy signal which is a signal different from the frame signal and which is artificially generated, in a case where the image pickup drive method is changed in response to a sensor switching request.