Image Forming Control for Discharge Sensor Failure Recovery
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing image forming devices face inconvenience when a malfunction in the detection unit for the discharge unit leads to unintended scan operations instead of the intended print operations, necessitating re-execution of the reading process.
Innovation Solution
The image forming apparatus includes a control unit that allows user intervention through a specific operation to execute the print operation despite a malfunctioning detection unit, utilizing stored image data from a previous scan operation to avoid re-reading.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If the detection unit is used to determine whether the discharge unit is in a discharge-possible state, then the operation control is automated, but the system becomes vulnerable to detection unit malfunctions that cause unintended scan operations
Solution Approach 1:
The control unit acts as an intermediary between the detection unit and the scanner/printer units. When a detection unit malfunction is detected (through user notification via the operation unit), the control unit intervenes to prevent automatic scan execution and instead offers the user a choice between scan and print operations, thereby mediating the conflict between automated control and reliable operation.
Solution Approach 2:
The system implements feedback through the operation unit that allows users to notify the control unit of detection unit malfunctions. This feedback mechanism enables the control unit to adjust its operation mode from fully automatic to user-selectable, ensuring reliable operation even when the detection unit fails.
2Reliability
If the scan operation is re-executed due to detection unit malfunction, then the system maintains operational correctness, but the time required to complete the print operation increases
Solution Approach 1:
The scanner unit executes the scan operation in advance and stores the scanned image data in the storage unit before the print operation is needed. When a detection unit malfunction occurs, the pre-stored image data can be used for the print operation without requiring re-scanning, thus maintaining operational correctness while reducing time loss.
Solution Approach 2:
Instead of discarding the previously scanned image data when a detection unit malfunction occurs, the system recovers and reuses the stored image data for the print operation. This prevents the need to re-execute the scan operation, thereby maintaining correctness while minimizing time loss.
3Productivity
If the system automatically executes scan operation when discharge unit is not in discharge-possible state, then the scan function is utilized, but the user cannot selectively execute only print operation when image data is already available
Solution Approach 1:
The control unit dynamically adjusts the operation mode based on the discharge unit state and user input. When the discharge unit is not in a discharge-possible state, the system transitions from a rigid automatic scan-execution mode to a flexible user-selectable mode, allowing users to choose between scan and print operations based on their specific needs and the availability of stored image data.
Data Source
AI summary
An image forming apparatus including a scanner to execute a scan operation to read an image from a document medium; a printer to execute a print operation to form the image read by the scanner unit onto a print medium; a discharger to discharge the print medium output from the printer unit; and a detector to detect whether the discharger is in a discharge-possible state. Further, there is determination circuitry configured to determine whether the image on the document medium is readable and control circuitry configured to control the scanner and the printer. When the determination circuitry determines that the image is readable and the detection circuitry indicates that the discharger is in the discharge-possible state, there is a display of a screen prompting the user to select whether to execute the print operation.