Stretchable Display Buffer Area Stress Dispersion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Flexible display devices are prone to physical damage due to stress accumulation from significant deformation, as their varying deformation modes lead to concentrated stress at boundaries between differentially elongating areas.
Innovation Solution
A stretchable display device design featuring a display area with islands and bridges, a peripheral area with distinct lines and connecting portions, and a buffer area with unique cut-out grooves and lines, allowing for differential elongation rates and stress dispersion between areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the display device is designed to be flexible and deformable, then adaptability is improved, but reliability deteriorates due to stress accumulation and physical damage
Solution Approach 1:
The display device is divided into multiple regions with different deformation characteristics: a display area that can deform, a buffer area with intermediate deformation properties, and a peripheral area with different elongation rates. This segmentation allows each region to handle stress appropriately, preventing damage while maintaining flexibility.
Solution Approach 2:
Different areas of the display device are given different mechanical properties. The buffer area has distinct elongation rates compared to the display and peripheral areas, creating a gradient structure that locally manages stress distribution and prevents concentration at boundaries.
2Device complexity
If the display area and peripheral area deform at the same rate, then structural simplicity is improved, but stress concentration occurs at boundaries causing damage
Solution Approach 1:
The buffer area is designed with different elongation rates between its first and second regions, creating a gradient that locally adapts to stress distribution. This local variation in deformation properties prevents stress concentration at the boundaries between the display area and peripheral area.
Solution Approach 2:
The device allows dynamic deformation where different areas deform at different rates. The buffer area's intermediate deformation properties enable it to dynamically absorb and distribute stress during deformation, preventing harmful stress concentration.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design enables the display device to stretch without cracking or breakage, maintaining image quality and preventing damage by dispersing stress through the buffer area and managing elongation rates between the display, peripheral, and buffer areas.
Implementation Method 1
maintaining image quality and preventing damage by dispersing stress through the buffer area and managing elongation rates between the display, peripheral, and buffer areas
Implementation Method 2
allowing for differential elongation rates and stress dispersion between areas
Data Source
AI summary
A stretchable display device includes a display area having stretchable display units each including first islands on which pixels are disposed and first cut-out grooves between the first islands. A peripheral area is adjacent to the display area, the peripheral area includes stretchable peripheral units each including first lines on which driving circuits are disposed and first opening portions between the first lines. A buffer area is disposed between the display area and the peripheral area. The buffer area includes stretchable buffer units each including second islands, second cut-out grooves between the second islands, second lines connected to the second islands, and second opening portions between the second lines. Shapes of the second cut-out grooves may be different from shapes of the first cut-out grooves, and shapes of the second opening portions may be different from shapes of the first opening portions.