Deformable Display Buffer Area Segmentation for Stress Distribution
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Solution Overview
Problem
Current display devices lack the ability to deform into various shapes while maintaining functionality, particularly in both display and non-display areas, leading to potential damage and electrical failures during shape changes.
Innovation Solution
A display device design featuring a display area with a light-emitting element, a driving circuit area, a buffer area, a pad area, and a middle area with extension areas, where the wiring is arranged to absorb stress, and the buffer area has varying buffer opening areas to distribute deformation, preventing strain propagation and protecting the wiring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the display device is designed to be deformable, then adaptability is improved, but reliability deteriorates due to potential damage and electrical failures during shape changes
Solution Approach 1:
The buffer area is divided into multiple buffer opening areas with different widths, creating segmented regions that independently absorb stress during deformation. This segmentation allows each region to handle specific portions of the mechanical stress, preventing uniform stress distribution that could lead to wiring damage and maintaining electrical connection reliability during shape changes.
Solution Approach 2:
The buffer area acts as an intermediary region between the display area and the pad area, absorbing mechanical stress before it reaches the electrical wiring. The varying widths of buffer opening areas create a gradient structure that gradually dissipates stress, protecting the electrical connections from direct mechanical damage while allowing the device to deform.
2Manufacturing precision
If the buffer area has uniform structure, then manufacturing precision is improved, but reliability deteriorates due to concentrated stress during deformation
Solution Approach 1:
The buffer area employs local quality variation by implementing buffer opening areas with different widths at different locations. This non-uniform structure is deliberately designed to create specific stress distribution patterns, where each local region with a particular opening width addresses the stress characteristics of its specific position during device deformation.
3Ease of operation
If the wiring is made more flexible, then ease of operation is improved, but strength deteriorates making the wiring more susceptible to damage
Solution Approach 1:
The buffer area with varying opening widths serves as a pre-configured cushioning structure that absorbs mechanical stress before it reaches the wiring. This beforehand cushioning protects the flexible wiring from excessive stress during deformation, allowing the wiring to maintain its flexibility for ease of operation while preventing damage through the protective buffer structure.
Data Source
AI summary
A display device includes a buffer area adjacent to a display area in a specific direction, a pad area arranged in the specific direction with respect to the buffer area, and a middle area including extension areas which extends from the pad area to the buffer area, where a wiring is arranged in the extension areas, and a middle opening area is defined in the middle area at least partially by edges of adjacent extension areas. A first buffer opening area, a second buffer opening area, and a third buffer opening area sequentially defined in the buffer area from the display area to the middle area. In the specific direction, a first width of the first buffer opening area is different from a second width of the second buffer opening area, and the second width is different from a third width of the third buffer opening area.