Zigzag Pixel Arrangement for Stretchable Display Resolution
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Solution Overview
Problem
Stretchable display devices face directional deviation in display resolution when expanded, leading to image deterioration due to changing intervals between elements on a flexible substrate.
Innovation Solution
A stretchable display device with a serpentine patterned substrate and pixel portions featuring rigid and elastic areas, where pixel rows are arranged in a zigzag pattern and connected by wires that elongate in specific directions to maintain consistent spacing during expansion, using a polydimethylsiloxane material for the elastic areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a flexible substrate is used to enable stretchability, then the display device can be expanded or contracted, but the intervals between elements change during stretching causing directional deviation in display resolution
Solution Approach 1:
The substrate is divided into rigid areas and elastic areas. The rigid areas maintain fixed intervals and structural integrity for precise element positioning, while the elastic areas provide stretchability. This segmentation allows the display device to be stretched without changing the intervals between elements, thus maintaining display resolution while achieving stretchability.
Solution Approach 2:
Different regions of the substrate are assigned different mechanical properties: rigid areas with high structural stability and elastic areas with high deformability. The rigid areas are positioned at locations requiring precise element spacing, while elastic areas are positioned to accommodate stretching, creating local quality differentiation that resolves the contradiction between stretchability and resolution precision.
2Ease of manufacture
If elements are arranged in a regular grid pattern, then manufacturing is simplified, but expansion causes non-uniform stretching and image deterioration
Solution Approach 1:
The pixel portions are arranged in a zigzag pattern rather than a regular grid, creating an asymmetric layout. This asymmetric arrangement allows the display device to expand uniformly in all directions without causing directional deviation in display resolution, thereby maintaining image quality while simplifying the expansion mechanism.
3Adaptability or versatility
If the entire substrate is made of elastic material, then stretchability is maximized, but structural stability and element positioning precision deteriorate
Solution Approach 1:
The substrate is segmented into rigid areas that provide structural stability and elastic areas that provide expandability. The rigid areas maintain fixed positions and intervals for precise element positioning, while the elastic areas enable the substrate to be expanded or contracted, thus resolving the contradiction between structural stability and expandability.
Solution Approach 2:
The substrate is constructed as a composite structure combining rigid materials and elastic materials in different regions. This composite design allows the substrate to simultaneously exhibit structural stability in rigid areas and high expandability in elastic areas, resolving the contradiction between these two opposing requirements.
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
This configuration maintains consistent display resolution and improves image representation by preventing directional deviation in display resolution during expansion, ensuring that the interval between pixels remains uniform in both the initial and expanded states.
Implementation Method 1
an elastic area surrounding the rigid area and being stretchable in the first direction... The stretchable substrate may be made of a polydimethylsiloxane (PDMS) material
Data Source
AI summary
A stretchable display device includes a stretchable substrate capable of being expanded or contracted in a first direction and pixel portions on the stretchable substrate. The pixel portions include rigid areas provided with a light emitter to selectively emit light depending on a driving signal and elastic areas surrounding the rigid areas. The pixel portions are continuously adjacent to each other in the first direction to form a plurality of pixel lines. The pixel portions included in a first pixel line and a second pixel line that are adjacent in the second direction are arranged in a zigzag form along the first direction.