Stretchable Display Reduction Patterns for Connection-Line Stress
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Solution Overview
Problem
Stretchable display apparatuses experience stress that can cause cracks and disconnect various connection structures, reducing reliability and shortening the lifespan of the device.
Innovation Solution
A reduction pattern is disposed on connection lines between pixel substrates to alleviate stress, comprising first and second reduction patterns with specific shapes and intervals, and a third reduction pattern along the inner circumference, all made of flexible materials like polyimide or epoxy-based resin, to minimize crack formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If connection lines are made rigid to maintain structural integrity, then strength is improved, but reliability deteriorates due to stress concentration and crack formation during bending and stretching
Solution Approach 1:
The connection line is designed with a wavy shape configuration that allows it to flex and deform elastically during bending and stretching operations. This wavy geometry acts as a flexible structure that can absorb mechanical stress without forming cracks, thereby maintaining both structural integrity and reliability under dynamic mechanical conditions
Solution Approach 2:
The connection line incorporates a wavy curved shape instead of a straight rigid structure. This curvature allows the connection line to distribute stress more evenly during deformation, preventing stress concentration at specific points and reducing the likelihood of crack formation while maintaining connection strength
2Adaptability or versatility
If the display apparatus is made stretchable to enhance adaptability, then versatility is improved, but reliability deteriorates due to stress-induced cracks and disconnections
Solution Approach 1:
The connection line employs a wavy shape configuration that provides flexibility and elastic deformation capability. This allows the display apparatus to be stretched and bent without causing crack formation or disconnection in the connection structures, thereby maintaining reliability while achieving stretchability and adaptability
Solution Approach 2:
The connection line is designed with dynamic geometric features (wavy shape) that allow it to adapt its configuration during stretching and bending. The wavy structure can dynamically adjust its shape to accommodate mechanical deformation, enabling the display apparatus to change form while maintaining connection integrity
Data Source
AI summary
A stretchable display apparatus can include a transistor substrate having a plurality of first regions corresponding to a plurality of pixel substrates disposed on a base substrate, and a second region between the plurality of first regions; a connection line disposed in the second region, the connection line electrically connecting two adjacent pixel substrates among the plurality of pixel substrates; and a reduction pattern disposed in the second region. Also, the reduction pattern can include a first reduction pattern overlapping with the connection line; and a second reduction pattern spaced apart from the first reduction pattern by a first distance and having a shape corresponding to at least a portion of the connection line.