Image Processing Hibernation Power Control
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Solution Overview
Problem
Conventional image processing apparatuses face challenges in safely executing hibernation shift processing without power supply failure, particularly when the hibernation shift processing is not completed within a predetermined time, leading to potential power-off issues.
Innovation Solution
An image processing apparatus with a processing unit that executes hibernation processing, a determination unit to assess completion within a target time, and a power control unit to either complete or interrupt the hibernation processing and stop the power supply accordingly, ensuring safe shutdown.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If hibernation processing is executed to save power, then standby power is reduced to zero, but the return time becomes longer
Solution Approach 1:
The determination unit performs preliminary assessment of whether hibernation processing can be completed within the target time before actually executing the power-off sequence. This preliminary evaluation allows the system to choose the appropriate shutdown path (hibernation or forced power-off) in advance, avoiding power supply interruption during hibernation execution
2Reliability
If a protection timer is set to guarantee power supply turns off after predetermined time, then power supply reliability is improved, but hibernation shift processing may be interrupted causing data loss
Solution Approach 1:
The determination unit continuously monitors the hibernation processing progress and provides feedback to the power control unit. Based on this feedback, the system dynamically adjusts the power-off timing to ensure hibernation completes successfully before the protection timer triggers forced power-off, preventing data loss while maintaining reliable power control
3Loss of energy
If the power switch is assigned as hibernation function, then power saving performance is improved, but the OFF/ON state coordination becomes complex
Solution Approach 1:
The determination unit automatically assesses the feasibility of hibernation completion and makes the decision whether to proceed with hibernation or forced power-off without requiring manual intervention or complex switch state management. This self-service mechanism simplifies the overall system complexity while maintaining improved power saving performance
Data Source
AI summary
When the first time has elapsed after the operator operates a power switch to stop power supply, an image processing apparatus forcibly stops power supply. When stopping power supply, the image processing apparatus executes hibernation processing to retract, in a secondary storage device, the stored content of a main memory used as a work area by a CPU. When the hibernation processing will be completed within a target time necessary to complete the hibernation processing and end processing of the image processing apparatus before the first time elapses, the image processing apparatus executes the end processing of the image processing apparatus and stops power supply after completing the hibernation processing; otherwise, the image processing apparatus interrupts the hibernation processing, executes the end processing of the image processing apparatus, and stops power supply.