Inkjet Recording Apparatus Cassette-Specific Correction Data
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Solution Overview
Problem
The existing recording apparatuses face issues with density unevenness in recorded images due to variations in nozzle tip diameters and ink droplet ejection characteristics among nozzles, even when manufactured through the same process, leading to a decrease in image quality when the sheet feeding source is changed.
Innovation Solution
A recording apparatus that generates and uses correction data based on the conveyance position of recording media from multiple sheet feeding cassettes, adjusting the image recording process to maintain consistent image quality across different sheet feeding sources by considering the sheet position adjustment values for each cassette.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If correction data is generated based on a single sheet feeding cassette, then recording quality is maintained for that specific cassette, but density unevenness occurs when switching to a different sheet feeding cassette
Solution Approach 1:
The patent segments the correction data into multiple distinct data sets, each corresponding to a specific sheet feeding cassette. The recording apparatus stores multiple correction data sets in memory, with each set calibrated for the unique conveyance characteristics of its associated cassette. This segmentation allows the system to maintain high recording quality for each individual cassette while adapting to differences between cassettes by selecting the appropriate correction data set based on which cassette is currently in use.
2Device complexity
If a single correction value is used for all sheet feeding cassettes, then device complexity is reduced, but recording quality deteriorates when the sheet feeding source changes
Solution Approach 1:
The patent implements a dynamic correction data management system where the correction data set is automatically selected based on the currently active sheet feeding cassette. The system dynamically switches between multiple correction data sets stored in memory, matching the correction data to the specific cassette being used. This dynamic approach maintains high recording quality across cassette changes without requiring complex real-time adjustment mechanisms, as the appropriate correction data is already pre-calibrated and readily available.
3Manufacturing precision
If multiple correction data sets are stored for different sheet feeding cassettes, then recording quality is maintained across cassette changes, but device complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-calculating and storing multiple correction data sets in memory before actual recording operations begin. Each correction data set is pre-adjusted to account for the specific conveyance position characteristics of each sheet feeding cassette. This preliminary preparation eliminates the need for complex real-time calculations or adjustments when cassette changes occur, as the system simply selects the pre-prepared correction data set that corresponds to the currently active cassette, thereby maintaining recording quality without excessive complexity.
Data Source
AI summary
A recording apparatus includes a recording unit, first and second holding units, and a generation unit. The recording unit records an image on a recording medium, conveyed in a second direction, by using recording elements arranged along a first direction. The generation unit generates first correction data based on an input recording job and image data and a first adjustment value indicating a conveyance position, in the first direction, of a recording medium from the first holding unit, and generates second correction data based on the recording job and the image data and a second adjustment value indicating a conveyance position, in the first direction, of a recording medium from the second holding unit. The recording unit records an image on the first holding unit recording medium based on the first correction data, and records an image on the second holding unit recording medium based on the second correction data.