Vertical Array Recording Head Nozzle Discharge Control
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Solution Overview
Problem
Existing vertical array type printing technologies face challenges in minimizing color inversion unevenness during recording processes, particularly when using a combination of black and chromatic inks.
Innovation Solution
A recording device with a recording head featuring a first nozzle group for achromatic liquids and multiple second nozzle groups for chromatic liquids, where the nozzle groups are arranged such that the discharge ratio of achromatic liquid in specific ranges is adjusted to match or exceed that of chromatic liquid ranges, ensuring consistent ink discharge across band regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the discharge ratio of achromatic liquid is increased in specific ranges adjacent to chromatic nozzle groups, then color inversion unevenness is suppressed, but the complexity of discharge ratio control increases
Solution Approach 1:
The patent applies local quality by differentiating discharge ratios into three specific ranges (first range adjacent to first chromatic color, second range adjacent to other chromatic colors, third range for other positions) within the achromatic nozzle group. Each range has different discharge ratio characteristics, allowing localized optimization to suppress color inversion unevenness while maintaining overall system functionality.
Solution Approach 2:
The patent changes the discharge ratio parameter dynamically based on the positional relationship between achromatic nozzles and chromatic nozzle groups. By adjusting discharge ratios according to specific ranges and scanning directions (forward vs. return scanning), the system optimizes ink deposition to minimize color inversion effects without requiring hardware modifications.
2Manufacturing precision
If multiple nozzle groups with different discharge ratios are used, then image quality consistency is improved, but the number of nozzle groups and control parameters increases
Solution Approach 1:
The achromatic nozzle group is segmented into three distinct ranges (first, second, and third ranges) based on their positional relationships with chromatic nozzle groups. This segmentation allows each range to be controlled independently with appropriate discharge ratios, improving image quality consistency while organizing the complexity into manageable segments rather than treating all nozzles uniformly.
Data Source
AI summary
A recording device includes a vertical array type recording head, and when an image is recorded by performing main scanning a plurality of times, by forward scanning, sub scanning, and return scanning, with a range of first nozzles of a first nozzle group adjacent in a second direction to a second nozzle group corresponding to a first chromatic color having a lowest discharge ratio among a plurality of chromatic liquids as a first range, and a range of first nozzles of the first nozzle group adjacent in a second direction to a second nozzle group corresponding to a chromatic color other than the first chromatic color of the plurality of chromatic colors as a second range, performs first recording control in which a discharge ratio of an achromatic liquid by the first range is made higher than a discharge ratio of the achromatic liquid by any second range.