Printer Error Storage and Display for Power State Transitions
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Solution Overview
Problem
Printers with auto power-off or sleep functions often fail to notify users of error events during printing, leading to repeated errors when the power is restored, as the user is not aware of the previous interruption.
Innovation Solution
A printer configuration that includes an error detection system to store and display error events when power is switched off, allowing users to recognize and address issues before resuming printing, thereby preventing repeated errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the printer is switched to supply shutoff state or low power consumption state after a predetermined reference time in operation stop state, then energy saving is improved, but the user is not notified of error events causing repeated errors
Solution Approach 1:
The error storage portion stores error event information before the printer transitions to supply shutoff or low power consumption state. This preliminary action ensures that error information is preserved and can be displayed later when the user returns, preventing repeated errors while maintaining energy saving functionality.
Solution Approach 2:
The error storage portion acts as an intermediary between the error occurrence detecting portion and the display control portion. It temporarily holds error event information during power state transitions, enabling the display control portion to show error notifications when the printer returns to normal power supply state, thus bridging the information gap during energy-saving modes.
2Reliability
If the printing process is interrupted due to error event during printing, then printing quality is protected, but the operation stop state lasts relatively long time
Solution Approach 1:
The display control portion provides feedback to the user by displaying error event information on the display device when the printer returns to normal power supply state. This feedback mechanism informs users of the interruption cause, enabling them to take corrective actions and resume printing sooner, thereby reducing the overall operation stop time while maintaining printing quality standards.
Data Source
AI summary
The disclosure discloses a printer includes an error occurrence detecting portion, an interruption control portion, a switching portion, an error storage portion, and a display control portion. The error occurrence detecting portion detects occurrence of an error event. The interruption control portion interrupts a printing process. The switching portion performs switching to a supply shutoff state or a low power consumption state. The error storage portion stores contents of the error event corresponding to the interruption when the switching portion performs the switching. The display control portion controls the display device to display an error display screen representative of the contents of the error event stored in the error storage portion in the case that a return to a normal power supply state.