Display Peripheral Spacer Layout to Prevent 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 integrity and performance of the display.
Innovation Solution
Incorporating a second spacer group above the first connection wire in a supplement area defined within the perimeter of the first connection wire, which helps in preventing delamination by maintaining consistent distances and materials, similar to the first spacer group surrounding the pixels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If various layers are stacked in the peripheral area to supply data or voltages, then the display apparatus can provide driving voltages to pixels, but the layers may interfere with one another and cause delamination
Solution Approach 1:
A second spacer group is introduced as an intermediary element between the encapsulation substrate and the first connection wire in the supplement area. This second spacer group prevents direct contact and potential delamination between the encapsulation substrate and the first connection wire, while still allowing the necessary electrical connections to be maintained through the first connection wire structure.
Solution Approach 2:
The problem of layer interference in the peripheral area is solved by adding a vertical dimension element (the second spacer group) that creates physical separation between stacked layers. This vertical spacing prevents the layers from interfering with each other while maintaining the necessary electrical connectivity through the connection wire structure.
2Reliability
If the supplement area is defined within the perimeter of the first connection wire to overlap with it, then delamination is prevented, but the device structure becomes more complex
Solution Approach 1:
The second spacer group is specifically positioned only in the supplement area where it is needed to prevent delamination, rather than being uniformly distributed throughout the entire device. This localized approach addresses the specific problem area (where the first connection wire transitions between adjacent and pad areas) without unnecessarily complicating the entire device structure.
Data Source
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 supplement area. The supplement area is defined within a perimeter of the first connection wire to overlap with the first connection wire in a plan view.