Liquid Ejecting Head with Layered Piezoelectric Orientation Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing piezoelectric-type liquid ejecting heads with layered thin-film piezoelectric bodies face challenges in orientation control due to the influence of underlying layers, leading to difficulties in achieving optimal ejection characteristics and efficiency.
Innovation Solution
A liquid ejecting head design with a first and second orientation control layer for each thin-film piezoelectric body, stacked in a specific order, allowing independent control of their orientation and enabling precise voltage application to enhance displacement efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If thin-film piezoelectric bodies are stacked in layers to increase displacement amount, then ejection characteristics are improved, but orientation control becomes difficult due to influence from underlying layers
Solution Approach 1:
An orientation control layer is introduced as an intermediary between the thin-film piezoelectric body and the underlying layer. This intermediate layer decouples the orientation control function from the underlying layer, allowing independent control of piezoelectric body orientation while maintaining the benefits of the stacked structure for increased displacement.
Solution Approach 2:
The structure is segmented into distinct functional layers: the thin-film piezoelectric body layer and the orientation control layer. This segmentation allows each layer to perform its specific function independently - the piezoelectric body generates displacement while the orientation control layer ensures proper crystal orientation, resolving the conflict between stacked structure benefits and orientation control difficulties.
2Force
If thin-film piezoelectric bodies are stacked in layers, then displacement amount per unit voltage increases, but it becomes difficult to control the properties of each thin-film piezoelectric body independently
Solution Approach 1:
The orientation control layer acts as a mediator that enables independent property control of each thin-film piezoelectric body. By placing this control layer between the piezoelectric body and the underlying structure, each piezoelectric body can be independently oriented and controlled despite being part of a stacked configuration.
Solution Approach 2:
The orientation control layer provides localized control functionality at each interface between the piezoelectric body and the underlying layer. This allows different regions and individual piezoelectric bodies to have independently optimized properties, enabling precise control of each element in the stacked structure.
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
The design improves ejection performance by allowing independent control of each thin-film piezoelectric body's orientation, resulting in enhanced displacement efficiency and improved ejection characteristics.
Implementation Method 1
A piezoelectric method uses piezoelectric elements configured to cause a diaphragm constituting a part of wall surfaces of pressure compartments to vibrate. The liquid with which the pressure comparts are filled is ejected from nozzles by causing the diaphragm to vibrate by means of the piezoelectric elements.
Implementation Method 2
a first orientation control layer for controlling an orientation of the first thin-film piezoelectric body is provided between the first thin-film piezoelectric body and the first common electrode, and a second orientation control layer for controlling an orientation of the second thin-film piezoelectric body is provided between the second thin-film piezoelectric body and the individual electrode
Data Source
AI summary
A liquid ejecting head includes: a first orientation control layer for controlling an orientation of the first thin-film piezoelectric body is provided between the first thin-film piezoelectric body and the first common electrode, and a second orientation control layer for controlling an orientation of the second thin-film piezoelectric body is provided between the second thin-film piezoelectric body and the individual electrode.