Toner Condition Detection Using Transfer Belt Area Segmentation
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Solution Overview
Problem
Existing electrophotographic image forming apparatuses inaccurately determine toner condition due to misidentification of damage or dirt on the surface of the belt as toner deterioration, leading to potential misplacement of toner on transfer members and contamination.
Innovation Solution
An image forming apparatus with a detector to measure toner properties and a control device that determines toner condition based on the difference in toner amount between areas where toner is transferred and areas where it is not, enhancing accuracy by distinguishing between toner and non-toner-related surface changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the image forming apparatus determines toner condition based on the surface condition of the belt using a sensor that detects reflected light, then the toner condition can be monitored, but the apparatus may misidentify damage or dirt on the belt surface as toner deterioration, reducing determination accuracy
Solution Approach 1:
The conveying member surface is divided into two distinct areas: a first area where toner is transferred and a second area where toner is not transferred. By segmenting the measurement areas and comparing toner amounts between them, the system can distinguish actual toner deterioration from belt surface defects, thereby improving determination accuracy while maintaining measurement precision.
2Reliability
If the apparatus uses a sensor to detect belt surface condition for toner condition determination, then toner deterioration can be detected, but false notifications may occur due to misidentification of non-toner matters, leading to unnecessary toner replacement
Solution Approach 1:
The control device compares the toner amount in the first area with the toner amount in the second area. This feedback mechanism allows the system to distinguish between actual toner deterioration (which would appear in both areas) and false conditions (which would only affect one area), thereby reducing false notifications while preserving accurate toner status information.
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
This approach improves the accuracy of toner condition determination, reducing false notifications and maintaining the cleanliness of transfer members by accurately identifying toner deterioration and preventing unnecessary toner replacement.
Implementation Method 1
The image forming apparatus includes a sensor that detects a surface condition of photosensitive belt. The image forming apparatus determines the toner condition based on an amount of reflected light from the intermediate transfer belt.
Implementation Method 2
The detector may be configured to detect one or more properties of the toner and, the control device may be configured to measure an amount of toner present on the conveying member. The control device may be configured to determine whether the toner is in the deteriorated condition based on a difference in the amount of toner between the first area and the second area.
Data Source
AI summary
In an image forming apparatus, a control device obtains an amount of toner in a first area and an amount of toner in a second area. The first area is defined on a conveying member that is in contact with a photosensitive member. The transfer of toner is assured in the first area of the conveying member, but is not assured in the second area. The control device determines a toner condition based on a difference in the amount of toner between the first area and the second area. When the difference in the amount of toner is larger, the control device determines that the toner is in a deteriorated condition. When the difference in the amount of toner is smaller, the control device determines that the toner is not in the deteriorated condition.