Voltage Generating Circuit Disconnection Detection via Low Impedance Resistor
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Solution Overview
Problem
Existing image forming apparatuses face inefficiencies in checking for disconnections between high voltage power supplies and electrical loads, leading to potential failures in applying normal bias voltage, which can result in malfunctioning electrical loads.
Innovation Solution
A method involving connecting electrodes to electrical loads with a low impedance resistor, generating and controlling voltages to detect normal connections based on electric potential differences, allowing for simultaneous checking of connections without additional monitoring structures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If one detecting means checks the connection with the high voltage power supply for each electrical load, then the connection status of each electrical load can be monitored, but the checking efficiency is low
Solution Approach 1:
The patent combines multiple detection functions into a single detection means. By connecting multiple electrodes through a low impedance resistor to form a common detection point, one detecting means can monitor the connection status of multiple voltage generating circuits simultaneously, thereby improving checking efficiency while maintaining monitoring reliability
2Reliability
If additional monitoring structures are added to check for disconnections, then the connection status can be detected, but the device complexity increases
Solution Approach 1:
The patent makes the detection means multi-functional by enabling it to detect disconnections in multiple voltage generating circuits simultaneously. The common detection point serves multiple purposes: monitoring connection status, detecting disconnections, and providing a reference for voltage comparison, thereby reducing the need for separate monitoring structures for each circuit
Solution Approach 2:
The patent introduces a low impedance resistor as an intermediary element connecting multiple electrodes. This intermediary component enables the detection means to access multiple voltage generating circuits through a single connection point, simplifying the monitoring structure while maintaining the ability to detect disconnections in each circuit
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This method enables efficient disconnection checking, ensuring normal voltage application to electrical loads and reducing the risk of malfunction, while minimizing additional wiring and noise interference.
Implementation Method 1
connecting a first electrode that is configured to be electrically connected to a first electrical load and a second electrode that is configured to be electrically connected to a second electrical load, by at least one of a short circuit and a resistor having an impedance that is lower than the electrical loads
Implementation Method 2
checking if there is a normal connection between the first voltage generating circuit and the first electrode and between the second voltage generating circuit and the second electrode based on an electric potential difference between the first voltage and the second voltage
Data Source
AI summary
A method and apparatus is provided for checking for a disconnection, with respect to an image forming apparatus including electrical loads and voltage generating circuits that generate voltages that are applied to the electrical loads, by determining if the voltage generating circuits and electrodes that are electrically connected to the electrical loads are normally connected.