Media Sensor Threshold Recalculation for Sheet Type Display
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Solution Overview
Problem
Existing electrophotographic image forming apparatuses face issues with inconsistent sheet type determination due to close proximity of detection results to preset thresholds, requiring re-feding of sheets for accurate determination after changing grammage thresholds, which is inconvenient for users.
Innovation Solution
An image forming apparatus with a media sensor that includes an ultrasonic and optical sensor system to detect sheet properties, allowing users to change thresholds directly, and a control unit to determine sheet information based on these detections, with an operation unit for displaying and receiving user instructions to adjust thresholds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the grammage threshold is changed by the user after sheet determination is performed, then the sheet type determination accuracy is improved, but the sheet needs to be fed again which reduces productivity
Solution Approach 1:
The patent applies preliminary action by storing the detection result before sheet determination is finalized. When the user wants to change the threshold, the system can recalculate using the stored detection result without requiring the sheet to be fed again. This prepares the detection data in advance for potential threshold adjustments.
Solution Approach 2:
The patent creates a copy of the detection result data and stores it in the control unit. This copied data can be reused when the user adjusts the threshold, eliminating the need to re-detect the sheet. The copy allows multiple threshold evaluations without additional physical sheet handling.
2Measurement precision
If the grammage threshold is changed by the user after sheet determination, then the determination accuracy for edge cases is improved, but the operation becomes more complex requiring additional user actions
Solution Approach 1:
The patent implements feedback by displaying the sheet determination result to the user and allowing threshold adjustment based on that feedback. The system provides the detection result and determination outcome, enabling the user to make informed threshold adjustments. After adjustment, the system recalculates and provides updated feedback, creating an iterative improvement cycle.
Solution Approach 2:
The patent makes the threshold dynamic rather than fixed. The threshold can be adjusted by the user based on actual sheet determination needs. The system dynamically recalculates the determination using the new threshold while maintaining the original detection result, allowing flexible adaptation without rigid constraints.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables accurate and user-friendly sheet type determination without the need for re-feeding sheets, improving convenience and reliability in setting appropriate image forming modes based on real-time user adjustments.
Implementation Method 1
a media sensor to determine sheet types. The media sensor detects physical properties of sheets using an optical sensor and the like
Implementation Method 2
The media sensor detects physical properties of sheets using an optical sensor and the like
Data Source
AI summary
A control unit determines sheet information based on a result of detection performed by a media sensor, and in a case where a threshold is changed after the determined sheet information is displayed on a display, the control unit determines sheet information based on the result of the detection and the changed threshold, and the display displays the sheet information.