Ink-jet Print Head Side Electrode Shielding Crosstalk
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Solution Overview
Problem
High-density and high-resolution inkjet print heads with multiple nozzles of the electrostatic field induced type suffer from electric field interference, leading to crosstalk issues that affect independent nozzle operation and accuracy in high-speed printing, and the conventional design with a facing electrode increases the device size and complexity.
Innovation Solution
The implementation of a side electrode structure with a first electrode formed within each nozzle and a second electrode positioned on the sides or surrounding the nozzle to block electric field interference, creating an electric potential difference for ink discharge while acting as a shielding wall to prevent crosstalk.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the separation distance between adjacent nozzles is reduced to achieve high density and high resolution, then the printing resolution and speed are improved, but the electric field interference between adjacent nozzles becomes severer, causing crosstalk and harming independent drive
Solution Approach 1:
A ground electrode is introduced as an intermediary element positioned between adjacent nozzles. This ground electrode acts as a shielding barrier that blocks electric field lines from directly coupling adjacent nozzles, thereby reducing crosstalk while allowing the nozzles to be placed closer together for high-resolution printing
Solution Approach 2:
The harmful electric field interference is extracted and redirected by the ground electrode. The ground electrode captures excess electric field lines that would otherwise couple adjacent nozzles, effectively removing the harmful interference component from the system while preserving the useful electrostatic attraction for ink ejection
2Object-generated harmful factors
If a conventional facing electrode design is used, then ink discharge can be achieved, but the total size and volume of the apparatus increases and the connection structure of driving circuit becomes complicated
Solution Approach 1:
The ground electrode is merged with the existing electrode structure of the inkjet print head. Instead of adding a separate facing electrode assembly, the ground electrode is integrated into the substrate or channel structure, combining multiple functions (grounding, shielding, and structural support) into a single element, thereby simplifying the overall device structure and reducing connection complexity
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 shields electric field interference between adjacent nozzles, enabling independent and accurate operation of multiple nozzles, simplifying the device design, and improving shielding efficiency, thus enhancing high-density and high-resolution printing capabilities.
Implementation Method 1
inducing an electrostatic field for discharging ink from the nozzle by forming an electric potential difference between the first electrode and the second electrode
Implementation Method 2
The electrostatic field induced type discharges ink by using the electrostatic attraction induced between electrodes
Implementation Method 3
arranged to block between any two adjacent nozzles... acting as a shielding wall to prevent crosstalk
Data Source
AI summary
Disclosed is a multi-nozzle inkjet print head using an electrostatic field induced type. The inkjet print head in accordance with an embodiment of the present invention includes: a first electrode being formed in each nozzle; and a second electrode located on a side spaced from the nozzle and arranged to block between any two adjacent nozzles and inducing an electrostatic field for discharging ink from the nozzle by forming an electric potential difference between the first electrode and the second electrode.