Liquid Ejecting Head Manifold Segmentation for Crosstalk Reduction
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Solution Overview
Problem
The existing liquid ejecting heads face challenges in achieving high printing precision due to crosstalk between displacing elements, which increases when trying to enhance resolution, and this is exacerbated by the need to widen the head to reduce crosstalk, leading to decreased precision.
Innovation Solution
The design incorporates a fluid channel member with a manifold partitioned into secondary manifolds, allowing for non-overlapping compression chamber rows and reduced crosstalk, while maintaining a narrow width by optimizing the arrangement of ejection holes and compression chambers, thus minimizing crosstalk and maintaining precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If intervals between displacing elements are increased to reduce crosstalk, then crosstalk is reduced, but the width of the liquid ejecting head increases
Solution Approach 1:
The manifold is segmented into multiple secondary manifolds by partitions, creating independent liquid supply channels for different compression chamber rows. This segmentation allows compression chambers to be arranged in a staggered pattern where odd-numbered and even-numbered rows are offset in the longitudinal direction, reducing crosstalk between adjacent displacing elements while maintaining a compact head width.
Solution Approach 2:
The patent transitions from a traditional grid arrangement where compression chambers overlap in both longitudinal and latitudinal directions to a staggered arrangement where compression chambers in adjacent rows are offset primarily in the longitudinal direction. This dimensional reorganization reduces lateral spacing requirements while maintaining adequate separation to minimize crosstalk.
2Manufacturing precision
If resolution is increased to improve printing precision, then printing precision is improved, but crosstalk between displacing elements increases
Solution Approach 1:
The manifold is divided into multiple secondary manifolds with partitions that create independent liquid supply paths. This segmentation isolates the liquid supply to different compression chamber rows, reducing hydraulic crosstalk between adjacent displacing elements and enabling higher resolution printing without crosstalk interference.
Solution Approach 2:
The patent employs a staggered arrangement of compression chambers where odd and even numbered rows are offset in the longitudinal direction. This dynamic spatial configuration allows closer spacing of ejection holes in the latitudinal direction (enabling higher resolution) while maintaining sufficient longitudinal separation to minimize crosstalk through the partition structures.
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 configuration allows for improved printing precision by reducing crosstalk and maintaining a narrow head width, enabling higher resolution printing without compromising precision.
Implementation Method 1
Another methodology is the piezoelectric type in which a portion of the walls of the ink channel where the ink is filled are made to flex by a displacing element, and this process mechanically pressurizes the ink in the ink channel to eject the ink as droplets from the ink ejection hole.
Implementation Method 2
One methodology is the thermal head type in which a heater functioning as a pressurizer is provisioned in an ink channel where the ink is filled. The ink is heated and boiled by the heater, then pressurized by air bubbles generated by the boiling of the ink in the ink channel, and ejected as droplets from the ink ejection hole.
Data Source
AI summary
A liquid ejecting head and a recording device are disclosed. The liquid ejecting head includes a fluid channel member and compressing members. The fluid channel member is elongated in a first direction. The fluid channel member includes ejection holes, compression chambers and a manifold. The compressing members is bonded to the fluid channel member. The manifold includes: a length extending in the first direction; openings at the first and second end portions of the fluid channel member; and secondary manifolds divided by one or more partitions that are elongated in the first direction. The compression chambers connected to one of the secondary manifolds configure two compression chamber rows disposed along the secondary manifolds, and the compression chambers belonging to the two compression chamber rows do not overlap in the first direction with compression chambers belonging to compression chamber rows adjacent to the two compression chamber rows.