Liquid Discharge Head Matrix Arrangement for Airflow Interference
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Solution Overview
Problem
Existing liquid discharge heads face challenges in miniaturization while maintaining high-definition and high-quality image formation, and they do not adequately address the issue of airflow interference during ink discharge operations.
Innovation Solution
The liquid discharge head is designed with a configuration that includes multiple rows of discharge port arrays for different colors, with a gray discharge port array group strategically placed between the yellow and magenta arrays to minimize airflow interference and achieve miniaturization, while ensuring high-definition image formation through varying discharge port sizes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the discharge port array is arranged to reduce color unevenness and improve image quality, then image quality is improved, but the head size increases
Solution Approach 1:
The patent transitions from a conventional linear arrangement of discharge port arrays to a two-dimensional matrix arrangement. The first and second discharge port arrays are arranged in a first direction, while the third and fourth discharge port arrays are arranged in a second direction intersecting the first direction. This dimensional change allows for more efficient space utilization and compact head design while maintaining the necessary discharge port configurations for high-quality image formation.
Solution Approach 2:
The patent combines multiple discharge port arrays (first, second, third, and fourth arrays) into a unified matrix arrangement where arrays in different directions work together. This merging of multiple arrays into an integrated structure achieves both the color uniformity required for high-quality images and the compact size needed for miniaturization, as the intersecting arrangements allow shared structural elements and optimized spacing.
2Reliability
If multiple discharge port arrays are arranged to minimize airflow interference, then discharge stability is improved, but device complexity increases
Solution Approach 1:
The patent employs asymmetric arrangement of discharge port arrays by configuring the first and second arrays in one direction and the third and fourth arrays in an intersecting direction. This asymmetric matrix layout optimizes airflow patterns between arrays, reducing interference effects while maintaining discharge stability. The non-uniform spacing and directional arrangement create favorable airflow channels that prevent turbulence and ink droplet dispersion issues.
Data Source
AI summary
In a liquid discharge head, a third discharge port array group C1 which discharges a liquid of cyan, a second discharge port array group M1 which discharges a liquid of magenta, a fourth discharge port array group G which discharges a liquid of gray, a first discharge port array group Y which discharges a liquid of yellow, a second discharge port array group M2 which discharges a liquid of magenta, a third discharge port array group C2 which discharges a liquid of cyan are arranged in this order, in a direction. Each of discharge port arrays of the fourth discharge port array group G is formed of a plurality of discharge ports having a diameter smaller than that of a plurality of discharge ports which constitute first discharge port arrays of the second and third discharge port array groups C1, C2, M1 and M2.