Power Supply State Reproduction in Image Processing Apparatus
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Solution Overview
Problem
Image forming apparatuses fail to reproduce the correct power supply state after a power interruption, returning to the power supply-on state regardless of the previous state, leading to incorrect restoration of power supply-off conditions.
Innovation Solution
An image processing apparatus with an input/output unit, a supply unit, and a controller that stores the power supply state before interruption and determines the correct power supply destination upon recovery, ensuring the apparatus returns to the correct power supply state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the image forming apparatus returns to the power supply-on state upon recovery from power supply interruption, then the apparatus can resume operation quickly, but the original power supply state cannot be reproduced when it was in the power supply-off state before interruption
Solution Approach 1:
The apparatus performs preliminary action by storing the power supply state information in a non-volatile memory before power supply interruption occurs. This allows the system to recall and restore the correct power supply state after recovery, rather than defaulting to power supply-on state every time.
Solution Approach 2:
The system implements feedback by reading the stored power supply state information after power recovery and using this information to control the power supply unit appropriately. The controller determines whether to supply power based on the retrieved state, creating a closed-loop control system that adapts to the previous operational condition.
2Loss of energy
If the apparatus always enters power supply-on state after power interruption, then operation resumption is simplified, but energy is wasted by powering on components that should remain off
Solution Approach 1:
The feedback mechanism reads the stored power supply state and uses it to control power supply destinations, ensuring that only necessary components are powered on after recovery. This prevents unnecessary energy consumption while maintaining operational simplicity through automated control.
Solution Approach 2:
The apparatus performs self-service by automatically determining and executing the appropriate power supply configuration based on stored state information, without requiring user intervention to manually restore the previous power state. This reduces both energy waste and operational complexity.
Data Source
AI summary
An image processing apparatus includes an input/output unit which performs an input operation and/or an output operation, a supply unit which supplies power from a primary power source to the input/output unit, a storage unit which stores therein a state of power supply to the input/output unit before the power supply from the primary power source is interrupted, and a controller which, when the power supply is started from a state where the power supply from the primary power source is interrupted, determines whether to supply power to the input/output unit based on the state of power supply stored in the storage unit, and when determined to supply power to the input/output unit, controls the supply unit to supply or not to supply power to the input/output unit based on the determination.