Peripheral Display Wiring Spacer Structure Against Layer Delamination
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Solution Overview
Problem
Display apparatuses face delamination issues in the peripheral areas due to interference between various stacked layers, which affects the reliability and aesthetics of the display.
Innovation Solution
Incorporating a second spacer group above the first connection wire in a supplementary area defined within the perimeter of the first connection wire, which helps in preventing delamination by maintaining a consistent distance from the encapsulation substrate and ensuring uniform pressure distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If various layers are stacked in the peripheral area to supply data or voltages, then the functionality of the display apparatus is improved, but the layers may interfere with one another and cause delamination
Solution Approach 1:
The patent introduces a spacer as an intermediary element positioned between the stacked layers in the peripheral area. This spacer maintains a predetermined distance between adjacent layers, preventing direct contact and interference while allowing the layers to remain in place for functionality. The spacer acts as a mediator that enables both the close proximity needed for functionality and the separation needed to prevent delamination.
2Device complexity
If layers are stacked closely to maintain compact structure, then the device complexity is reduced, but the layers may delaminate due to interference
Solution Approach 1:
The patent segments the peripheral area structure by introducing a spacer that divides the space between stacked layers. This segmentation creates distinct zones where layers are maintained at a predetermined distance, preventing interference while preserving the overall compact structure. The spacer effectively partitions the space to eliminate delamination risks without requiring complete layer separation.
3Reliability
If spacers are added to prevent delamination, then the reliability is improved, but the device complexity increases
Solution Approach 1:
The patent applies the spacer structure locally only in the peripheral area where delamination occurs, rather than throughout the entire display apparatus. This localized application maintains reliability in the critical peripheral region while minimizing the overall increase in device complexity. The spacer is strategically positioned where it is most needed to prevent delamination without unnecessarily complicating the entire device structure.
Data Source
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AI summary
A display apparatus includes: a substrate including: a display area including a plurality of pixels; a pad area at one side of the display area; and an adjacent area between the display area and the pad area; a first connection wire above the substrate in the adjacent area, and to transmit a driving voltage from the pad area to the plurality of pixels in the display area; a first spacer group adjacent to the plurality of pixels in the display area; and a second spacer group above the first connection wire in a supplementary area. The supplementary area is defined within a perimeter of the first connection wire to overlap with the first connection wire in a plan view.