Image Forming Apparatus Positional Deviation Detection
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Solution Overview
Problem
Existing image forming apparatuses lack a distinct method to differentiate and utilize overlapping and non-overlapping patterns effectively, leading to inefficiencies in positional deviation detection and correction.
Innovation Solution
An image forming apparatus that includes an image forming device, a sensor, and a controller, capable of forming and detecting both overlapping and non-overlapping patterns on a rotation member, allowing the controller to execute appropriate detection processing based on specific conditions to determine positional deviations and adjust image formation accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If overlapping pattern detection processing is executed, then positional deviation between colors can be detected, but detection accuracy is reduced due to manufacturing errors in optical sensors
Solution Approach 1:
A light-receiving element array serves as an intermediary detection system between the overlapping pattern and the optical sensor. The array directly measures the positions of light-receiving elements with high precision, bypassing the manufacturing errors of the optical sensor. This intermediary measurement system enables accurate detection of positional deviations without being affected by sensor inaccuracies.
Solution Approach 2:
The patent replaces optical detection (prone to manufacturing errors) with a light-receiving element array that provides more stable and accurate positional measurements. By substituting the optical sensing mechanism with a direct light-receiving element measurement system, the invention achieves higher measurement precision that is less sensitive to manufacturing variations.
2Device complexity
If non-overlapping pattern detection processing is executed, then detection processing is simplified, but positional deviation between colors cannot be effectively detected
Solution Approach 1:
The patent merges the advantages of both overlapping and non-overlapping patterns by using a light-receiving element array that can detect positions regardless of pattern type. This combination approach allows the system to use simple non-overlapping patterns for routine detection while maintaining the capability to detect color positional deviations through the array's direct position measurement, thus achieving both simplicity and accuracy.
3Measurement precision
If overlapping pattern is used for detection, then color positional deviation can be detected, but the detection system becomes more complex
Solution Approach 1:
The light-receiving element array acts as an intermediary that simplifies the detection system architecture. Instead of requiring complex optical systems to analyze overlapping patterns, the array directly measures light-receiving element positions, providing color positional deviation information through a simpler, more direct measurement approach.
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 precise detection and correction of positional deviations, improving image quality by distinguishingly using overlapping and non-overlapping patterns, and reducing detection errors associated with manufacturing errors in the optical sensor.
Implementation Method 1
a sensor and a controller. The controller is configured to execute an overlapping pattern detection processing, a non-overlapping pattern detection processing, and an execution processing
Data Source
AI summary
An image forming apparatus includes an image forming device which forms an image on a rotation member, a sensor, and a controller. The controller executes an overlapping pattern detection processing which detects a positional deviation amount using an overlapping pattern including a plurality of overlapping marks with overlapped colorant images of two colors, a non-overlapping pattern detection processing which detects a positional deviation amount using a non-overlapping pattern including a plurality of marks, each having a single color, and an execution processing which executes the overlapping pattern detection processing or the non-overlapping pattern detection processing based on a condition.