Flexible Display Substrate Partition Structure Around Stretch Holes
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Solution Overview
Problem
Existing flexible OLED display devices face challenges in maintaining structural integrity and preventing damage to light-emitting devices during bending, particularly due to stress concentrations at stretch holes and power supply lines.
Innovation Solution
The display substrate incorporates a partition structure with recessed features around stretch holes and power supply lines, including partition layers and cover layers with protrusions, to enhance tensile performance and protect the light-emitting devices by reducing direct contact and overlap with the power supply lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If stretch holes are introduced to improve flexibility, then bendability is improved, but stress concentrations occur at the stretch holes causing structural integrity issues
Solution Approach 1:
The partition structure introduces local quality variations by creating distinct regions (partition layers and cover layers with protrusions) around stretch holes. These localized structural modifications concentrate stress management functions at specific locations, allowing the stretch holes to maintain flexibility while the partition structures prevent stress propagation that would compromise overall structural integrity.
2Area of stationary object
If power supply lines are placed close to stretch holes for compact design, then device compactness is improved, but stress during bending causes damage to power supply lines
Solution Approach 1:
The partition structure acts as an intermediary element between the stretch holes and power supply lines. The partition layers and cover layers with protrusions create a protective interface that absorbs and distributes mechanical stress, preventing direct stress transmission to the power supply lines while allowing the overall device to maintain compact dimensions.
3Strength
If partition structures with protrusions are added around stretch holes, then stress concentration is reduced, but device complexity increases
Solution Approach 1:
The partition structure segments the region around stretch holes into distinct functional layers (partition layers and cover layers with protrusions). This segmentation allows each layer to perform specific stress management functions independently, improving stress distribution while keeping each individual layer relatively simple in design.
Data Source
AI summary
Provided in the present disclosure are a display substrate and a display device. The display substrate includes a display area and a frame area located on at least one side of the display area, and the display area and the frame area include at least one stretching hole; the stretching hole includes a hole area and a partition area, which surrounds the stretching hole, the partition area being provided with a first partition structure surrounding the hole area; and the first partition structure includes a first partition layer, which surrounds the hole area, and a first inorganic layer, which is arranged on the first partition layer, the first partition layer is provided with a partition slot surrounding the hole area, the first inorganic layer is provided with a partition hole surrounding the hole area, and the partition hole is in communication with the partition slot.