Endoscope Power Sequencing With Output Voltage Verification
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Solution Overview
Problem
Endoscopes with multiple electronic parts require precise power management to ensure that drive voltages are applied correctly, as existing solutions lack a systematic approach to verify the normalcy of output voltages before powering on sensitive components, potentially leading to defects and peak noise.
Innovation Solution
A power supply apparatus with multiple power supply circuits and power changeover switches, controlled by a power control circuit that checks the output voltage of each circuit before applying drive voltages to electronic parts, following a defined power-on sequence to prevent defects and noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If power is supplied to multiple electronic parts simultaneously, then power supply efficiency is improved, but the risk of applying incorrect drive voltages increases
Solution Approach 1:
The patent implements a power-on sequence control mechanism where the power control circuit determines the on/off state of each power supply line based on predetermined sequences before supplying power. This preliminary action ensures that electronic parts are powered in the correct order, preventing incorrect voltage application while maintaining efficient power supply management.
2Measurement precision
If voltage adjustment is performed for each electronic part, then drive voltage accuracy is improved, but device complexity increases
Solution Approach 1:
The patent employs a single power control circuit that performs multiple functions: determining on/off states of power supply lines, controlling power supply sequences, and adjusting output voltages for different electronic parts. This multi-functional approach achieves precise drive voltage control without proportionally increasing device complexity.
3Manufacturing precision
If power supply lines are individually controlled, then power management precision is improved, but control complexity increases
Solution Approach 1:
The patent divides the power supply system into multiple independently controllable power supply lines, each with its own power supply circuit and control mechanism. This segmentation allows precise individual control of power to different electronic parts while the centralized power control circuit coordinates them through predetermined sequences, balancing precision with manageable complexity.
Data Source
AI summary
A power supply apparatus for an endoscope includes a plurality of power supply circuits, a plurality of power changeover switches, and a power control circuit. The power control circuit performs an operation to determine, when one power changeover switch provided on one power supply line connecting one power supply circuit of the plurality of power supply circuits and one electronic part of the plurality of electronic parts in each order of the power-on sequence is set to off, whether an output voltage of the one power supply circuit is normal or not and an operation to start a supply of one drive voltage required to drive the one electronic part according to a judgement result that the output voltage of the one power supply circuit is normal.