Side Guide Printing for Straight Display Panel Side Lines
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Solution Overview
Problem
Existing display devices using LEDs face challenges in forming straight and accurate side lines, particularly at corners, leading to increased defects and reduced yield due to printing inaccuracies and difficulties in connecting wiring lines on top and bottom surfaces, which are exacerbated by tiling displays.
Innovation Solution
A device for manufacturing side lines that includes a stage with side guides to maintain straightness and a printing unit to form conductive paste, ensuring accurate alignment and connection of wiring lines on both surfaces of the display panel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If existing manufacturing techniques are used for side lines, then the manufacturing process is simple, but the straightness and uniformity of side lines deteriorate leading to increased defect rates
Solution Approach 1:
A side guide structure is introduced as an intermediary component between the printing unit and the substrate. The side guide includes side guide protrusions that contact the substrate to suppress inclination during printing, thereby improving side line straightness without requiring complex adjustments to the printing unit itself
Solution Approach 2:
The side guide is designed to automatically suppress substrate inclination during the printing process through its protrusions that contact the substrate. This self-adjusting mechanism eliminates the need for external alignment devices or complex control systems, maintaining device simplicity while improving manufacturing precision
2Productivity
If printing accuracy is not improved, then the manufacturing process remains fast, but defect rates increase reducing productivity
Solution Approach 1:
The side guide protrusions preemptively suppress substrate inclination before the printing process completes. By preventing inclination in advance rather than correcting it afterward, the system maintains high printing accuracy without requiring rework or slowing down the manufacturing process
Solution Approach 2:
The side guide acts as a mediator that ensures accurate printing by maintaining proper substrate positioning throughout the printing process. This intermediary structure enables high precision printing to be achieved without compromising manufacturing speed
3Area of stationary object
If bezel area is not minimized, then manufacturing is easier, but the display device size cannot be reduced
Solution Approach 1:
The display system is segmented into multiple sub-displays that can be tiled together. The side lines on adjacent substrates are designed to align and connect when the displays are positioned close together, enabling minimal bezel areas while maintaining electrical connectivity across the tiled arrangement
Solution Approach 2:
The connection between adjacent display panels is achieved by extending side lines onto the side surfaces of the substrates. This three-dimensional arrangement allows electrical connections to be made at the edges of adjacent panels, enabling ultra-thin bezels without compromising manufacturing feasibility
Data Source
AI summary
According to an aspect of the present disclosure, a device for manufacturing a side line includes a stage on which a substrate is loaded, a side guide configured to be disposed adjacent to a side portion of the substrate loaded on the stage, and a printing unit configured to print a conductive paste on the substrate.