Electrostatic Inkjet Assembly for High-Speed Display Printing
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Solution Overview
Problem
Existing inkjet printing apparatuses fail to meet high-speed requirements for inkjet printing of display components due to fluid inertia and low response speed, causing ink to fall onto banks and affect yield.
Innovation Solution
An inkjet assembly with a deflection member and control member to provide deflection force to fluid, allowing real-time dynamic shutdown during printing, using electrodes to deflect fluid and a fluid guide layer with separate channels for precise ink droplet formation and collection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the jet printing process starts and stops quickly to meet high-speed requirements, then printing speed is improved, but the fluid with large inertia and low response speed falls onto the banks and flows into adjacent pixel cells, affecting printing precision and component yield
Solution Approach 1:
A deflection member (electrode) is introduced as an intermediary between the fluid source and the substrate. This electrode applies an electric field to deflect the fluid stream during high-speed printing operations, preventing ink from falling onto banks and flowing into adjacent pixels, thus maintaining printing precision while enabling high-speed operation
Solution Approach 2:
The patent replaces the purely mechanical control system with an electrostatic field-based control system. By using an electrode to generate an electric field that deflects the fluid stream, the system achieves faster and more precise control over ink deposition compared to mechanical methods alone, resolving the contradiction between speed and precision
2Productivity
If multiple nozzles are used to print large areas simultaneously to improve efficiency, then printing efficiency is improved, but the complexity of controlling fluid flow and preventing cross-contamination between pixels increases
Solution Approach 1:
The deflection member (electrode) serves multiple functions: it deflects fluid from multiple nozzles simultaneously, controls fluid direction for each pixel, and prevents cross-contamination between adjacent pixels. This multi-functional approach maintains simplicity while enabling efficient multi-nozzle operation
Solution Approach 2:
The system controls fluid flow by changing electrical parameters (voltage applied to the electrode) rather than mechanical parameters. This allows independent control of each nozzle's fluid flow through electrical signals, simplifying the control system while enabling precise multi-nozzle operation without cross-contamination
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
Enables high-speed inkjet printing by preventing ink deposition between pixel cells, ensuring precise and efficient ink application on display components.
Implementation Method 1
a deflection member configured to provide a deflection force to a fluid emitted from the inkjet port
Data Source
AI summary
The present disclosure relates to the field of display technology, and provides an inkjet assembly, an inkjet printing apparatus and an inkjet printing method. The inkjet assembly includes at least one jet printing member having a first surface on which an inkjet port is formed. The inkjet assembly further includes a deflection member configured to provide a deflection force to a fluid emitted from the inkjet port and a control member configured to control operation of the deflection member.