Main Processor Error Recovery in Image Forming Apparatus
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Solution Overview
Problem
In image forming apparatuses, such as multi-function products (MFPs), errors in the main processor can render entire functions unusable, leading to data loss and operational disruptions since conventional systems lack effective error detection and recovery mechanisms for the main processor itself.
Innovation Solution
The implementation of sub-processors with error detection, notification, and recovery capabilities, including an error detector, interface controller, error notification unit, and error recovery unit, allows for the detection and recovery of main processor errors, ensuring continuous operation and preventing data loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a main processor is used to control multiple sub-processors in an image forming apparatus, then the control capability and functionality are improved, but the system becomes vulnerable to errors that can render entire functions unusable
Solution Approach 1:
The patent divides the monolithic main processor into multiple independent sub-processors, each responsible for specific control functions. This segmentation ensures that an error in one sub-processor does not propagate to the entire system, thereby improving reliability while maintaining control capability through distributed processing architecture.
Solution Approach 2:
The patent introduces an error detector as an intermediary component that monitors the main processor's operation. This intermediary detects errors early and triggers recovery mechanisms, preventing errors from compromising overall system reliability while allowing the main processor to maintain its control functions.
2Reliability
If error detection and recovery mechanisms are added to detect main processor errors, then system reliability is improved, but the device complexity increases
Solution Approach 1:
The patent implements self-service error recovery where the error detector and recovery unit are integrated within the existing processor architecture. The system automatically detects and recovers from errors without requiring external intervention or additional complex error management infrastructure, thereby improving reliability with minimal increase in device complexity.
Solution Approach 2:
The patent merges the error detection and recovery functions with the existing sub-processor architecture. Rather than adding separate independent error management systems, the error detector and recovery unit are combined with the sub-processors, reducing overall system complexity while maintaining robust error handling capabilities.
3Loss of substance
If the interface controller stops receiving data when an error is detected, then data loss is prevented, but operational continuity is disrupted
Solution Approach 1:
The patent implements preliminary error detection before data processing is affected. The error detector continuously monitors processor operations and triggers the interface controller to stop receiving data only after an error is confirmed, preventing data loss while minimizing disruption to operational continuity through early error interception.
Solution Approach 2:
The patent establishes a feedback loop where the error detector continuously monitors processor status and provides real-time feedback to the interface controller. This feedback mechanism enables dynamic adjustment of data reception - stopping only when errors are detected and resuming automatically after recovery, thereby preventing data loss while maintaining operational continuity through adaptive control.
Data Source
AI summary
A method of performing error notification and error recovery functions in an image forming apparatus includes detecting by one or more sub-processors an error of a main processor for controlling the sub-processors; controlling an interface function of the image forming apparatus if the error is detected; outputting information about the detected error; and recovering the detected error by controlling an operation of the main processor.