Bendable Display Interconnect Layout to Prevent Line Short-Circuits
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Solution Overview
Problem
Existing display apparatuses face challenges in reducing defects such as short-circuits of conductive lines, particularly when bent to enhance visibility or reduce size.
Innovation Solution
A display apparatus design that includes a substrate bent around a bending axis, with internal and external conductive lines connected via organic through-holes and connection lines on an organic material layer, which reduces the interval between conductive lines and minimizes defects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the substrate is bent to enhance visibility or reduce size, then the display apparatus becomes more versatile and compact, but the occurrence of defects such as short-circuits in conductive lines increases
Solution Approach 1:
The conductive lines are divided into first conductive lines in the first area and second conductive lines in the second area, with connection lines bridging the bending area. This segmentation allows each section to be optimized independently, reducing stress concentration and defect occurrence at critical interfaces during bending.
Solution Approach 2:
Different structural configurations are applied to different areas: the first area has conductive lines arranged for optimal display performance, the second area has conductive lines arranged for mechanical flexibility, and the bending area has a gradual transition structure. This local optimization reduces overall defect occurrence while maintaining versatility.
2Manufacturing precision
If the interval between conductive lines is reduced to increase pixel density, then the display resolution improves, but the risk of short-circuits between conductive lines increases
Solution Approach 1:
Conductive lines are arranged in multiple layers at different heights, utilizing the vertical dimension to separate lines that would otherwise be too close in the horizontal plane. This three-dimensional arrangement allows reduced horizontal spacing while maintaining adequate insulation distance through vertical separation.
Solution Approach 2:
Insulating layers are introduced as intermediary structures between conductive lines to provide electrical isolation. These intermediary layers enable closer spacing of conductive lines while preventing short-circuits, thus improving pixel density without compromising reliability.
Data Source
AI summary
A display apparatus includes: a substrate having a bending area between a first area and a second area; internal conductive lines on the substrate in the first area; external conductive lines on the substrate in the second area; an organic material layer covering the bending area and covering at least a portion of the internal conductive lines and the external conductive lines; and connection lines on the organic material layer and connecting the internal conductive lines to the external conductive lines, respectively. Organic through-holes are defined through the organic material layer, the connection lines are respectively connected to the internal conductive lines through the organic through-holes, and an upper surface of the organic material layer between the organic through-holes has a convex curved shape.