Inkjet Printing with Movable Electric Field Alignment
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Solution Overview
Problem
Existing inkjet printing technologies face challenges in achieving high-speed printing and accurate alignment of dipole elements on display devices such as OLED and LCD panels, which affect the reliability of the final display products.
Innovation Solution
An inkjet printing apparatus that lifts the target substrate in the air over a stage and moves it horizontally while generating an electric field using an electric field generating unit, combined with a print head unit and substrate transferring mechanism to align and spray ink with dipoles accurately.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the target substrate is moved horizontally over an airflow stage during inkjet printing, then printing speed is improved, but alignment accuracy of dipole elements deteriorates
Solution Approach 1:
The electric field generating unit is made movable to dynamically track and follow the horizontally moving target substrate. This allows the electric field application position to be continuously adjusted in real-time, maintaining alignment accuracy despite the substrate's horizontal movement during high-speed printing
Solution Approach 2:
The system implements a feedback mechanism where the position of the target substrate is monitored during horizontal movement, and the electric field generating unit's position is adjusted accordingly to maintain proper alignment with the substrate for accurate dipole element placement
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 approach enables high-speed printing with improved alignment of dipole elements, resulting in more reliable display devices with enhanced printing accuracy and efficiency.
Implementation Method 1
The airflow stage may include a plurality of air holes formed on an upper surface of the airflow stage, and at least some of the plurality of air holes may be configured to discharge air onto the airflow stage
Implementation Method 2
an electric field generating unit that moves in the first direction and generates an electric field on the airflow stage
Implementation Method 3
the gripper may be configured to adsorb the target substrate onto a surface of the gripper by generating negative pressure between the gripper and the target substrate
Data Source
AI summary
An inkjet printing apparatus includes: an airflow stage extending in a first direction; a print head unit disposed above the airflow stage; and an electric field generating unit that moves in the first direction and generates electric field above the airflow stage.