Image Forming Apparatus Sheet Type Correction
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Solution Overview
Problem
Existing image forming apparatuses lack the capability to effectively manage and correct image quality variations when multiple types of sheets are used in a single print job, as they do not consider the varying quality requirements based on the type of sheet used.
Innovation Solution
An image forming apparatus that includes a sheet feeding unit, an image forming unit, and a controller to detect and correct image quality by forming a chart for gradation correction specific to each sheet type, allowing for the generation of correction information based on detected image information and storing it for future use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single reference value and correction value are managed for the entire print job, then the device complexity is reduced, but the image quality varies when multiple sheet types are used
Solution Approach 1:
The patent segments the correction value management by creating separate reference values and correction values for each sheet type. The controller identifies the sheet type and selects the appropriate correction values from multiple sets, rather than using a single unified correction set. This segmentation allows precise image quality control for each sheet type while maintaining manageable device complexity through automated selection.
Solution Approach 2:
The patent implements local quality by maintaining different correction parameters for different sheet types. Each sheet type has its own reference values and correction values tailored to its specific characteristics. This ensures that the image quality is optimized locally for each sheet type rather than using a generic correction approach.
2Manufacturing precision
If gradation correction is performed for each sheet type, then the image quality is improved, but the device complexity increases
Solution Approach 1:
The patent employs dynamics by making the correction value selection adaptive and dynamic. The controller automatically identifies the sheet type and dynamically selects the appropriate correction values from multiple sets. This dynamic approach allows the system to handle multiple sheet types with different correction requirements without requiring manual intervention or complex configuration, thus improving image quality while keeping the operation simple.
Solution Approach 2:
The patent uses feedback mechanisms where the controller detects the sheet type and uses this information to select the appropriate correction values. This feedback loop ensures that the correct correction parameters are applied for each sheet type, improving image quality while the automated nature of the feedback process prevents excessive complexity in the system.
Data Source
AI summary
An image forming apparatus is provided. the apparatus comprises a sheet feeding unit to supply a plurality of types of sheets; an image forming unit to form an image on a sheet; a detection unit to detect an image formed on the sheet; and a controller that causes correction information for each sheet type to be saved in a storage, and under set conditions, causes a specified type of sheet to be supplied by the sheet feeding unit, causes a chart for gradation correction to be formed by the image forming unit, and causes the correction information to be generated based on image information for which the formed chart for gradation correction was detected by the detection unit, and saves the correction information in the storage.