Inkjet Nozzle Timing Control for Precise Display Patterning
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Solution Overview
Problem
Existing inkjet printing technologies fail to accurately control ink discharge at individual nozzles, leading to imprecise pattern printing in display device manufacturing.
Innovation Solution
An apparatus and method that includes a control unit to adjust ink discharge timing and position based on image information from cameras, allowing precise control of ink discharge from multiple nozzles, and corrects for injection errors by adjusting nozzle operation and stage movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional inkjet printing is used without individual nozzle control, then the device complexity is low, but the manufacturing precision of ink placement is poor
Solution Approach 1:
The patent divides the inkjet printing system into independently controllable nozzle units, where each nozzle can be individually selected and controlled based on its specific characteristics. This segmentation allows precise control of ink placement at the nozzle level while maintaining overall system manageability through modular architecture.
Solution Approach 2:
The patent implements local quality control by assigning different discharge timing parameters to different nozzles based on their individual characteristics. Each nozzle receives customized control parameters rather than uniform control, enabling high manufacturing precision while adapting to local variations in nozzle performance.
2Manufacturing precision
If uniform ink discharge timing is used for all nozzles, then the ease of operation is high, but the manufacturing precision of pattern printing deteriorates
Solution Approach 1:
The patent transitions from static uniform discharge timing to dynamic individualized discharge timing control. The system automatically adjusts discharge timing parameters for each nozzle based on measured characteristics, enabling high pattern printing precision while reducing operational complexity through automated parameter optimization.
Solution Approach 2:
The patent implements feedback control by measuring actual ink discharge characteristics of each nozzle and using this information to optimize discharge timing parameters. This closed-loop approach ensures high manufacturing precision while simplifying operation, as the system self-adjusts based on measured performance rather than requiring manual calibration.
3Manufacturing precision
If individual nozzle discharge timing is not adjusted, then the productivity is high, but the manufacturing precision of ink placement is low
Solution Approach 1:
The patent performs preliminary characterization of each nozzle's discharge characteristics before actual printing operations. By pre-measuring and storing individual nozzle parameters, the system enables high manufacturing precision during printing without adding real-time adjustment complexity, thus maintaining productivity while improving precision.
Data Source
AI summary
Provided are an apparatus and a method for manufacturing a display device. The apparatus includes an ink discharging unit configured to move in a first direction and including a head unit including a plurality of nozzles spaced apart from each other and configured to discharge ink on a substrate and a film member, wherein the ink is discharged through at least one nozzle unit including a plurality of columns, an inspection unit including a film member including a same material as the substrate, a camera unit configured to obtain first image information about the ink discharged on the film member, and a moving unit configured to move the ink discharging unit and the camera unit in the first direction, wherein at least two nozzles to discharge ink are selected from among the plurality of nozzles based on the first image information.