Inkjet Print Head Suction Cleaning for Nozzle Non-Discharge
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Solution Overview
Problem
Inkjet printing devices face issues with non-discharge of ink due to light emitting elements accumulating in the print head nozzles, leading to clogging and degraded display quality in OLED and LCD manufacturing processes.
Innovation Solution
An inkjet printing device with a print head, dipping bath, and suctioning system is designed, where the print head is immersed in a suction solution, and a suctioning part connected to the print head suctions the ink and light emitting elements, using a three-way valve to manage ink flow and a suction pump to remove accumulated elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If inkjet printing is used to form organic layers or inorganic LED elements, then manufacturing efficiency and precision are improved, but light emitting elements accumulate in the print head nozzles causing non-discharge and clogging
Solution Approach 1:
The system performs preliminary suction action before the inkjet printing process to prevent light emitting elements from accumulating in the nozzles. The suction pump actively removes particles from the ink supply line and print head before clogging can occur, ensuring continuous reliable operation while maintaining printing precision
Solution Approach 2:
A suction solution is introduced as an intermediary substance that interacts with the ink in the print head. The suction solution helps to dislodge and remove accumulated light emitting elements from the nozzles, acting as a mediator between the ink and the suction pump to prevent clogging while maintaining print quality
2Productivity
If the print head operates continuously to maintain productivity, then manufacturing output is improved, but light emitting elements accumulate causing non-discharge
Solution Approach 1:
The suction pump operates continuously or periodically alongside the inkjet printing process to maintain clear nozzles throughout production. This continuous action ensures that light emitting elements are constantly removed from the ink supply path, allowing the system to maintain high productivity without interruptions from clogging
Solution Approach 2:
The system incorporates a feedback mechanism where the suction pump responds to conditions in the ink supply line. When light emitting elements begin to accumulate, the suction action increases to remove them, ensuring continuous reliable operation while maintaining high manufacturing output
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
Effectively addresses the non-discharge issue by removing light emitting elements from the print head nozzles, ensuring consistent ink flow and improving display quality by preventing nozzle clogging.
Implementation Method 1
a suction pump connected to the third connecting tube and transmitting suction force to the ink
Data Source
AI summary
An inkjet printing device and a method of addressing non-discharge. The inkjet printing device comprises a print head including nozzles that discharge an ink including light emitting elements, a dipping bath in which the print head is immersed and which includes a suction solution, and a suctioning part which is connected to the print head and suctions the suction solution along with the ink remaining in the print head unit.