Nozzle Channel Width Variation for Crosstalk Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing liquid ejecting heads face issues with structural crosstalk and increased nozzle channel resistance, leading to decreased ink ejection characteristics and potential ejection failures.
Innovation Solution
The design incorporates a first and second pressure chamber with corresponding nozzle channels and communication channels, where the nozzle channels have varying widths in different directions to minimize structural crosstalk while maintaining low channel resistance, utilizing a configuration where the width of one portion of the nozzle channel is larger than another in the intersecting direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the nozzle channels are made narrower to reduce structural crosstalk, then the ejection characteristics improve, but the channel resistance increases causing ejection failure
Solution Approach 1:
The nozzle channel is designed with different widths at different locations: a first width in the first direction and a second width in the second direction. This local variation in dimensions allows the channel to have different resistance characteristics in different directions, reducing structural crosstalk while maintaining adequate liquid supply
Solution Approach 2:
The invention introduces a second direction perpendicular to the first direction for channel dimensioning. By controlling the channel width in this second direction to be larger than in the first direction, the design addresses crosstalk in one dimension while maintaining flow characteristics in the other dimension
2Productivity
If the nozzle channels are made wider to reduce channel resistance, then the liquid supply improves, but the structural crosstalk increases causing ejection failure
Solution Approach 1:
The nozzle channel exhibits different width characteristics at different locations and directions. The channel width in the second direction is intentionally made larger to facilitate liquid supply, while the width in the first direction is controlled to minimize structural crosstalk between adjacent channels
Solution Approach 2:
The channel cross-section is designed asymmetrically with respect to the two directions, with the width in the second direction being larger than in the first direction. This asymmetric design allows independent optimization of liquid supply (productivity) and crosstalk reduction (reliability)
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 effectively reduces structural crosstalk and prevents an increase in nozzle channel resistance, thereby improving ink ejection characteristics and preventing ejection failures.
Implementation Method 1
JP-A-2013-184372 discloses a liquid ejecting head that ejects liquid from nozzles by changing the pressure of the liquid in pressure chambers with piezoelectric elements
Data Source
AI summary
The first nozzle channel includes a first portion including an end of the first nozzle channel and a second portion including another end of the first nozzle channel, and a width of the second portion in the second direction is larger than a width of the first portion in the second direction.