Image Position Deviation Correction in Image Forming Apparatus
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Solution Overview
Problem
Conventional image forming apparatuses face significant delays due to time-consuming deviation correction processing, which occurs when transfer position deviations are caused by temperature changes, leading to potential image quality degradation and prolonged printing times.
Innovation Solution
An image forming apparatus equipped with a specific pixel detection section and determination section that dynamically assesses the need for deviation correction based on temperature changes and the presence of specific pixels, executing correction only when both conditions are met to minimize unnecessary processing and maintain image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If deviation correction processing is executed to correct transfer position deviation, then image quality is maintained, but printing time increases significantly
Solution Approach 1:
The patent changes the parameter of correction execution frequency by introducing conditional judgment based on temperature change amounts. Instead of executing correction processing at fixed intervals or whenever deviation occurs, the system dynamically adjusts whether to execute correction based on whether temperature change exceeds a threshold, thereby reducing unnecessary processing while maintaining image quality when needed
Solution Approach 2:
The patent implements feedback control by detecting temperature changes and using this information to determine whether deviation correction should be executed. The system continuously monitors temperature, compares it against thresholds, and adjusts correction execution accordingly, creating a closed-loop control mechanism that optimizes both image quality and printing efficiency
2Manufacturing precision
If deviation correction processing is executed frequently, then image quality degradation is prevented, but operational efficiency decreases
Solution Approach 1:
The system changes the operational parameter from frequent fixed-interval correction to conditional correction based on temperature thresholds. By monitoring temperature change amounts and only executing correction when thresholds are exceeded, the system maintains image quality while significantly improving operational efficiency by eliminating unnecessary correction operations
Solution Approach 2:
The patent applies partial action by executing deviation correction only when necessary (when temperature change exceeds threshold) rather than performing full correction processing in all cases. This selective approach maintains sufficient image quality while reducing overall processing time and improving productivity
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 reduces the frequency of deviation correction processing, thereby decreasing the time required for printing and preventing image quality deterioration, while ensuring that corrections are made only when necessary, thus enhancing operational efficiency and user experience.
Implementation Method 1
The transfer position deviation is mainly caused by a change in dimension of an optical unit in response to a change in temperature within the apparatus
Data Source
AI summary
An image forming apparatus includes a developing section, an image carrier, a deviation correction section, a specific pixel detection section and a determination section. The developing section forms a visible image on a photoconductor for each type of developer. The image carrier carries the visible images formed in a plurality of the developing sections. The deviation correction section corrects position deviation of the plurality of visible images formed on the image carrier. The specific pixel detection section detects the specific pixel used to form an image with a plurality types of developers. The determination section determines execution of correction in the deviation correction section according to information indicating an amount of the specific pixels.