Liquid Ejecting Head Channel Width Configuration for Crosstalk Reduction
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Solution Overview
Problem
In liquid ejecting heads, increasing the width of nozzle channels and communication channels to reduce resistance leads to structural crosstalk, causing deterioration in ejection characteristics due to vibration transfer between adjacent channels.
Innovation Solution
The liquid ejecting head design includes pressure chambers and nozzle channels with specific width and sectional area configurations in different directions to minimize structural crosstalk while maintaining low channel resistance, featuring first and second pressure chambers, nozzle channels, and communication channels with varying widths and sectional areas to absorb and reduce vibration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the width of nozzle channels and communication channels is increased to reduce channel resistance, then channel resistance decreases, but structural crosstalk increases causing deterioration in ejection characteristics
Solution Approach 1:
The liquid ejecting head is divided into multiple independent ejector units, each comprising a pressure chamber, communication channel, and nozzle channel. This segmentation isolates the fluidic paths, allowing each unit to operate independently while minimizing vibration transfer between adjacent channels, thus reducing structural crosstalk while maintaining adequate channel dimensions for low resistance
Solution Approach 2:
The partition walls between adjacent communication channels and nozzle channels are designed with optimized thickness and material properties in specific locations. The partition thickness is increased in regions where vibration isolation is critical, while maintaining overall channel width for low resistance. This local variation in partition quality reduces structural crosstalk without compromising the overall channel dimensions
2Manufacturing precision
If nozzle channels and communication channels are densely arranged to enhance image quality, then image quality improves, but partition thickness between adjacent channels becomes insufficient leading to structural crosstalk
Solution Approach 1:
The design transitions from a two-dimensional planar arrangement to a three-dimensional configuration by varying partition thickness in the depth direction. Partition walls are made thicker in the Z-direction (depth) while maintaining tight spacing in the X-Y plane, enabling dense channel arrangement for high image quality while providing sufficient vibration isolation through increased partition thickness in the third dimension
Solution Approach 2:
The partition walls are constructed using composite material structures with different stiffness and damping properties. By selecting materials with appropriate vibration isolation characteristics, the partitions can effectively reduce structural crosstalk between densely arranged channels while maintaining the required geometric precision for high image quality
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 between nozzle channels and communication channels, maintaining consistent ejection characteristics and improving ink ejection performance by controlling channel resistance.
Implementation Method 1
a piezoelectric element to change the pressure of a liquid in a pressure chamber
Data Source
AI summary
A width of the first nozzle channel in the first direction is larger than a width of the first communication channel in the second direction and a width of the first nozzle channel in a third direction intersecting the first direction and the second direction is smaller than a width of the first communication channel in the third direction.