Stretchable Display Panel Layout for Resolution and Damage Control
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Solution Overview
Problem
Stretchable display devices suffer from degradation of resolution, damage, and yellowish reflective visibility due to stretching.
Innovation Solution
A stretchable display device with a flexible viewing angle panel and structured connection lines that deform during stretching, minimizing tensile stress and protecting against damage, while improving visibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the display device is stretched to achieve flexibility and form change, then the adaptability and form variability are improved, but the resolution degrades and the display quality deteriorates
Solution Approach 1:
The display device is divided into multiple pixel units (first pixel unit, second pixel unit, etc.) that can independently deform during stretching. Each pixel unit contains sub-pixels (red, green, blue) arranged in a specific pattern, allowing the overall display to maintain resolution while accommodating form changes through segmented deformation.
Solution Approach 2:
The patent introduces a third dimension by forming protruding structures (first protruding structure, second protruding structure) that extend perpendicular to the display surface. These three-dimensional features provide additional deformation pathways that accommodate stretching without compromising the two-dimensional pixel array integrity, thereby maintaining resolution during form changes.
2Adaptability or versatility
If the display device is stretched to achieve flexibility, then the adaptability is improved, but the damage or breakage risk increases
Solution Approach 1:
The patent incorporates buffer structures and spacing between pixel units that act as cushioning elements during stretching. The first and second protruding structures are positioned to absorb and distribute mechanical stress before it reaches the fragile pixel elements, preventing damage and breakage while enabling stretchability.
Solution Approach 2:
The display device utilizes flexible substrate materials and thin film structures that can deform elastically during stretching. The pixel units and connection structures are designed as flexible components that can bend and stretch without fracturing, maintaining reliability while achieving adaptability.
3Reliability
If connection lines are added to electrically connect adjacent island substrates, then the electrical connectivity is improved, but the yellowish reflective visibility in the wiring area increases
Solution Approach 1:
The patent applies different optical properties to different regions of the display device. The connection lines are designed with specific optical characteristics (such as anti-reflective coatings or light-absorbing materials) that differ from the surrounding pixel areas. This local differentiation allows the connection lines to maintain electrical connectivity while minimizing yellowish reflective visibility, ensuring optimal display quality.
Data Source
AI summary
A stretchable display device according to one or more examples includes a lower substrate, a plurality of pixels including a plurality of sub pixels, a plurality of island substrates disposed on the lower substrate and spaced apart from each other, each corresponding to a respective pixel, a plurality of connection lines which electrically connects pads disposed in adjacent island substrates among the plurality of island substrates, an upper substrate disposed above the lower substrate, and a viewing angle panel disposed above the upper substrate and including a plurality of structures configured to be deformed during stretching, and each sub pixel includes a display element area, a first wiring area, a second wiring area, and a transparent area.