Micro-LED Display Groove Layout for Flat Pixel Circuit Transfer
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing display apparatuses face issues with flatness reduction due to organic insulating materials flowing into bending areas, leading to manufacturing defects and increased process complexity, while micro-LED transfer rates and power efficiency are compromised.
Innovation Solution
The display apparatus incorporates a substrate with grooves for pixel driving circuits, using inorganic insulating layers and omitting additional flattening components, along with an organic insulating layer to secure flatness and minimize defects, and employs an adhesive pattern in the grooves to reduce foreign material attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If organic insulating materials are disposed in the display area, then insulation is provided, but flatness of the display area is reduced due to materials flowing into the bending area
Solution Approach 1:
The display area is divided into a first area and a second area by a first groove, separating the regions where pixel driving circuits are disposed from the bending area. This segmentation prevents organic insulating materials from flowing into the bending area while maintaining insulation functionality in the display area.
Solution Approach 2:
Different structural characteristics are applied to different regions: the first area contains pixel driving circuits with specific groove structures for localized material containment, while the bending area maintains a different structure to preserve flatness and prevent material infiltration.
2Shape
If additional flattening components or processes are implemented, then flatness is improved, but manufacturing complexity and cost increase
Solution Approach 1:
The patent extracts and eliminates the need for additional flattening components or processes by designing the groove structure and inorganic insulating layer configuration to inherently maintain flatness, thereby reducing manufacturing complexity while achieving the desired flatness outcome.
Solution Approach 2:
The inorganic insulating layer and groove structure self-regulate to maintain flatness without requiring external flattening processes. The structural design inherently prevents material flow that would compromise flatness, making additional flattening steps unnecessary.
3Productivity
If the display area flatness is not secured, then micro-LED transfer rate is reduced, but additional flattening processes increase manufacturing cost
Solution Approach 1:
The groove structure and inorganic insulating layer are prepared in advance during the substrate fabrication process, creating a pre-flattened surface that ensures high micro-LED transfer rates without requiring additional flattening processes, thereby reducing manufacturing costs.
Data Source
AI summary
A display apparatus may include a substrate; a display area; a non-display area outside the display area; a groove disposed in the display area; an inorganic insulating layer disposed in an area excluding the groove in the display area; a pixel driving circuit disposed in the groove; and a plurality of micro-LEDs disposed on the pixel driving circuit and electrically connected to the pixel driving circuit. Therefore, a transfer rate of the micro-LED may be improved by securing flatness of an area where the pixel driving circuit is disposed above the substrate and an area surrounding the area in the display area.