USB Device Priority Management in Image Formers
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Solution Overview
Problem
In multi-user environments, image forming apparatuses face inefficiencies in using USB connectors due to limitations in connector availability, making it difficult for users to determine which USB devices can be extracted and when, leading to misidentification of devices with ongoing jobs or authentication states.
Innovation Solution
The implementation of a state management system that tracks the status of attached USB devices, including authentication and job states, to display priority indications for extraction, allowing users to efficiently manage and prioritize device removal based on availability and usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple USB devices are attached to multiple USB connectors in a multi-user environment, then the functionality and versatility of the image forming apparatus is improved, but the complexity of managing and tracking device states increases
Solution Approach 1:
The patent uses visual indicators (displaying priority information on the operation panel) to show the state of USB devices. The control unit displays priority levels that indicate which devices can be extracted, using visual differentiation to help users understand device states without complex manual tracking
Solution Approach 2:
The system provides continuous feedback to users about the state of USB devices through the operation panel display. The control unit monitors device states (authentication, job execution) and provides real-time information about extraction priority, enabling users to make informed decisions about device removal
2Reliability
If the system prevents USB device extraction during authentication or job execution states, then data reliability and job completion are improved, but the ease of operation and user convenience deteriorates
Solution Approach 1:
The system dynamically adjusts the extraction priority of USB devices based on their current state. Devices in authentication or job execution states are assigned lower extraction priority, while devices with completed jobs are assigned higher priority. This dynamic prioritization allows the system to maintain reliability for active jobs while facilitating easy extraction of completed devices
Solution Approach 2:
The patent segments USB devices into different priority groups based on their operational state. By categorizing devices as high-priority (can be extracted) or low-priority (should not be extracted), the system simplifies user decision-making while ensuring that critical jobs are not interrupted
3Measurement precision
If the system displays detailed state information for all USB connectors, then the precision of device status detection is improved, but the device complexity and interface complexity increases
Solution Approach 1:
The patent extracts only the most essential information needed for user decision-making and displays it on the operation panel. Instead of showing all possible device states and parameters, the system focuses on displaying extraction priority information, which is the critical factor users need to determine whether they can safely remove a USB device
Data Source
AI summary
It is determined whether or not a USB display button is pressed, and if so determined, a USB device status management table in a USB device status management part is referenced. Ranking determination is made based on information on the USB device status management table. After the ranking determination, priority is set based on the ranking determination result. Then, a USB device priority screen is displayed on a manipulation display of a manipulation panel part.