Stretchable display panel and stretchable display device
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Solution Overview
Problem
Conventional stretchable OLED displays suffer from reduced brightness and poor luminous uniformity due to decreased pixel density and stretching stress, leading to inadequate display quality.
Innovation Solution
A stretchable display panel design with a laminated structure of pixel layers connected by a stretchable guideline, featuring stress relief holes filled with light-transmitting polymer material, allowing partial misalignment and light transmission between layers to maintain brightness and uniformity during stretching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the stretchable elastomer is deformed to achieve stretchability, then the display can be stretched and folded, but the pixel density decreases and display brightness is significantly reduced
Solution Approach 1:
The pixel layer is divided into multiple light-emitting units separated by stretchable portions. This segmentation allows the light-emitting regions to remain relatively fixed while the stretchable portions deform, maintaining pixel density and display brightness during stretching operations.
Solution Approach 2:
Different regions of the display have different functional properties: the light-emitting units maintain their optical properties for brightness, while the stretchable portions provide deformation capability. This local differentiation resolves the contradiction between maintaining brightness and achieving stretchability.
2Adaptability or versatility
If the stretchable elastomer is deformed to achieve stretchability, then the display can be stretched and folded, but the luminous uniformity becomes poor
Solution Approach 1:
By segmenting the pixel layer into distinct light-emitting units and stretchable portions, the invention ensures that only the non-light-emitting portions undergo significant deformation, thereby maintaining uniform light emission across the display surface during stretching.
Solution Approach 2:
The stretchable portions act as intermediary elements that absorb the deformation stress, protecting the light-emitting units from direct mechanical stress and ensuring uniform luminous output during stretching operations.
3Illumination intensity
If the pixel density is maintained to ensure display quality, then the display brightness remains stable, but the stretchability is limited
Solution Approach 1:
The pixel layer is segmented into light-emitting units and stretchable portions, allowing the display to maintain high pixel density in the light-emitting regions while providing stretchability through the separate stretchable portions. This segmentation enables both high display quality and stretchability to coexist.
Solution Approach 2:
The invention introduces a spatial dimensionality change by arranging light-emitting units and stretchable portions in a specific pattern, allowing the display to maintain dimensional stability in the light-emitting regions while accommodating deformation in the stretchable portions.
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 maintains photoelectric performance and display quality by ensuring light emission through non-overlapping light-emitting regions, addressing issues of reduced brightness and luminous uniformity in stretched states.
Implementation Method 1
a stretchable guideline connecting the first pixel layer and the second pixel layer
Implementation Method 2
at least the first stress relief hole is filled with a stretchable polymer material, and the stretchable polymer material is in a light-transmitting state
Data Source
AI summary
A stretchable display panel and a stretchable display device. The stretchable display panel includes a first pixel layer and a second pixel layer that are arranged in a laminated manner in a stacking direction, and a pixel interlayer arranged between the first pixel layer and the second pixel layer. The pixel interlayer includes a stretchable guideline connecting the first pixel layer and the second pixel layer. In a stretched state, a light-emitting region of the first pixel layer and a light-emitting region of the second pixel layer are at least partially not overlapped in the stacking direction, under a traction of the stretchable guideline.