Printing Apparatus Power Saving State Entry via USB Interruption Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Printing apparatuses fail to enter a power saving state due to interruption processes triggered by the attachment or detachment of USB devices during the suspending process, leading to increased power consumption.
Innovation Solution
Implementing a process that prevents the execution of interruption processes when a USB device is attached or detached during the suspending process by controlling the power supply through a central processing unit (CPU) and complex programmable logic device (CPLD), allowing the apparatus to enter a power saving state without interrupting the suspending process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the printing apparatus executes an interruption process when a USB device is attached or detached during the suspending process, then the device communication is maintained, but the power saving state cannot be entered and power consumption increases
Solution Approach 1:
The patent applies preliminary anti-action by detecting the attachment or detachment of a USB device before the suspending process completes, and preemptively preventing the interruption process from executing. The CPU monitors device connection status during suspension, and when a connection change is detected, it suppresses the interruption process that would otherwise prevent entry into the power saving state. This preliminary prevention resolves the contradiction by prioritizing power saving while maintaining sufficient device communication functionality.
Solution Approach 2:
The patent implements preliminary action by performing device connection status detection during the suspending process, before the interruption process would normally execute. The system proactively identifies when a USB device is attached or detached and takes preventive measures to stop the interruption process, allowing the power saving state to be entered. This preliminary detection and prevention mechanism resolves the contradiction between maintaining device communication and reducing power consumption.
2Adaptability or versatility
If the interruption process is executed during the suspending process, then the USB device attachment or detachment is handled, but the suspending process is interrupted and the power saving state is not achieved
Solution Approach 1:
The patent applies preliminary anti-action by detecting USB device attachment or detachment events during the suspending process and preemptively preventing the interruption process from executing. The CPU monitors connection status changes and suppresses interruption processes that would otherwise prevent the power saving state from being entered, thus resolving the contradiction between adapting to device changes and achieving power savings.
Solution Approach 2:
The patent extracts the harmful effect of the interruption process by identifying and removing its execution during the suspending process. When a USB device attachment or detachment is detected, the system selectively prevents the interruption process from running, thereby extracting the negative impact that blocks power saving state entry while maintaining the ability to handle device connections when appropriate.
3Use of energy by moving object
If the printing apparatus enters the power saving state quickly, then power consumption is reduced, but the suspending process may be interrupted by USB device operations
Solution Approach 1:
The patent applies preliminary anti-action by detecting USB device attachment or detachment during the suspending process and preemptively preventing interruption processes from executing. This ensures the suspending process completes without interruption, allowing the power saving state to be entered successfully, thus resolving the contradiction between reducing power consumption and ensuring reliable process completion.
Solution Approach 2:
The patent implements preliminary action by monitoring USB device connection status during the suspending process and proactively preventing interruption processes before they can disrupt the suspension. This preliminary prevention mechanism ensures the suspending process completes reliably and the power saving state is achieved, resolving the contradiction between quick power saving entry and process reliability.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
An image processing apparatus according to the present invention may operate in a normal state and a power saving state in which power consumption is smaller than that in the normal state. The image processing apparatus includes a detection unit (101) which detects attachment of a detachable device to the image processing apparatus and detachment of the device from the image processing apparatus and a controller (101) which controls execution of an interruption process in response to the attachment or the detachment of the device detected by the detection unit (101). The controller (101) brings the image processing apparatus from the normal state to the power saving state after causing the detection unit (101) not to perform the detection.