Multi-Point Toner Detection for Image Forming Devices
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Solution Overview
Problem
Conventional image-forming devices face inaccuracies in detecting the residual toner level due to detection light passing through a single point, leading to incorrect readings during abnormal conditions.
Innovation Solution
The implementation of a residual toner detecting unit with multiple detection light transmitting points within the developer-accommodating section allows for accurate detection of the developer amount by emitting and receiving detection light at various positions, ensuring reliable toner level determination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single detection light transmitting point is used, then the device complexity is reduced, but the measurement precision deteriorates due to incorrect detections during abnormal conditions
Solution Approach 1:
The single detection point is segmented into multiple detection light transmitting points (first, second, third, and fourth points) arranged at different positions within the toner-accommodating chamber. This segmentation allows the system to detect toner levels from multiple locations, preventing incorrect readings that may occur at a single abnormal point while maintaining relatively simple device complexity.
2Measurement precision
If multiple detection light transmitting points are used, then the measurement precision improves, but the device complexity increases
Solution Approach 1:
The detection system is segmented into multiple discrete light transmitting points with corresponding light receiving points, allowing accurate measurement from multiple positions. The segmentation is implemented through strategically positioned transparent portions in the chamber walls, enabling multi-point detection without requiring complex additional components.
Solution Approach 2:
The multiple detection points serve the universal function of determining toner level by detecting light transmission. Each detection point pair (transmitting and receiving) performs the same measurement function, but at different spatial locations, making the system more robust while maintaining a relatively simple overall structure.
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 solution enhances the accuracy of toner level detection, preventing incorrect readings and ensuring timely replacement of the developer cartridge, thereby maintaining device performance.
Implementation Method 1
a light-emitting unit that irradiates a detection light through one of the detection light transmitting points and a light-receiving unit that receives the detection light that has passed through the subject one detection light transmitting point
Data Source
AI summary
An image-forming device has a developer-accommodating section and a residual toner detecting unit. The developer-accommodating section accommodates a developer. The developer-accommodating section defines a plurality of detection light transmitting points through which a detection light is transmitted to detect an amount of developer accommodated in the developer-accommodating section. The residual toner detecting unit has a light-emitting unit that irradiates a detection light through one of the detection light transmitting points and a light-receiving unit that receives the detection light that has passed through the subject one detection light transmitting point.