Endoscope Signal Processor Synchronization Correction

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Solution Overview

Problem

In endoscope systems, synchronization signal deviations due to disturbances can lead to improper image processing and display, especially when the imager lacks a synchronization signal transmission function, causing errors in clock signal operation and image synchronization.

Innovation Solution

A signal processing device with a processor that switches between states to permit or prohibit the clock signal input to the imager based on synchronization signal synchronization, using a switch control circuit to manage the clock signal flow between synchronization signal generation circuits, thereby temporarily stopping imager operation to correct synchronization deviations.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Length of moving object

If the imager removes the synchronization signal transmission function to downsize, then the insertion unit diameter is reduced, but synchronization deviations occur due to disturbances affecting clock signal operation

Engineering Contradiction:
Improveinsertion unit diameterVSAvoidsynchronization accuracy
Core Design Contradiction:
Length of moving objectVSReliability

Solution Approach 1:

The patent introduces a synchronization signal generation circuit that generates synchronization signals based on voltage level changes in the image signal, acting as an intermediary to restore synchronization functionality without requiring the imager to transmit synchronization signals directly. This mediator component enables the imager to be downsized while maintaining synchronization accuracy through a separate synchronization signal path.

Inventive Principle:
Principle #24Intermediary (Mediator)

Solution Approach 2:

The system implements feedback by monitoring the synchronization between the first synchronization signal from the synchronization signal generation circuit and the second synchronization signal from the imager operation control circuit. When desynchronization is detected, the system provides feedback to adjust the clock signal input state, ensuring synchronization accuracy is maintained despite the imager's reduced functionality.

Inventive Principle:
Principle #23Feedback

2Productivity

If the imager operates continuously without synchronization control, then productivity is improved, but image display errors occur due to synchronization deviations

Engineering Contradiction:
Improveimager operation continuityVSAvoidimage display accuracy
Core Design Contradiction:
ProductivityVSManufacturing precision

Solution Approach 1:

The patent applies dynamics by making the clock signal input state changeable between permitted and prohibited states based on synchronization conditions. The switch control circuit dynamically adjusts the clock signal input to the imager, allowing continuous operation while maintaining image display accuracy through adaptive synchronization control that responds to real-time synchronization status.

Inventive Principle:
Principle #15Dynamics

3Ease of operation

If the clock signal input to the imager is continuously permitted, then ease of operation is improved, but synchronization deviations cause improper image processing

Engineering Contradiction:
Improvesystem operation simplicityVSAvoidimage processing accuracy
Core Design Contradiction:
Ease of operationVSReliability

Solution Approach 1:

The system implements self-service through automatic synchronization monitoring and control. The switch control circuit automatically monitors synchronization between the two synchronization signals and adjusts the clock signal input state without requiring manual intervention. This self-service mechanism maintains image processing accuracy while keeping the system easy to operate, as the synchronization control is automated and transparent to the user.

Inventive Principle:
Principle #25Self-service

Data Source

PatentUS11957315B2Signal processing device, endoscope system, and signal processing method
Publication Date: 2024.04.16 OLYMPUS CORPORATION(JP)
  • US11957315B2 patent drawing
  • US11957315B2 patent drawing
  • US11957315B2 patent drawing

AI summary

A signal processing device includes: a processor including at least one or more pieces of hardware, the processor being configured to: switch to one of a first state in which an input of a clock signal for operating an imager to the imager is permitted and a second state in which the input of the clock signal to the imager is prohibited, and temporarily switch from the first state to the second state when a first synchronization signal output from a first synchronization signal generation circuit and a second synchronization signal output from a second synchronization signal generation circuit are not synchronized.