Stretchable Display Substrate Groove Routing
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Solution Overview
Problem
Existing stretchable display panels can only stretch in a direction parallel to the substrate, limiting their flexibility and potential applications.
Innovation Solution
A display substrate with a stretchable substrate featuring grooves on its surface, where signal lines are designed with portions within and outside the grooves, allowing for stretching in multiple directions by using an elastic insulating material to isolate and route the signal lines, and the substrate is made of polydimethylsiloxane for enhanced tensile properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a flat substrate is used for stretchable display panels, then the substrate can be manufactured with simple processes, but the display panel can only stretch in a direction parallel to the substrate
Solution Approach 1:
The substrate surface is segmented into multiple grooves that divide the substrate into distinct regions. These grooves allow different parts of the substrate to deform independently during stretching, enabling multi-directional elasticity while maintaining manufacturing feasibility through patterned segmentation
Solution Approach 2:
The substrate structure transitions from a purely two-dimensional flat surface to a three-dimensional structure with grooves. This dimensional change creates additional deformation pathways, allowing the substrate to stretch not only parallel to the surface but also perpendicular to it, thereby achieving multi-directional stretching capability
2Adaptability or versatility
If signal lines are placed on a flat substrate surface, then the electrical connection is simple, but the signal lines cannot accommodate multi-directional stretching
Solution Approach 1:
Signal lines are segmented to run along the groove structures rather than across flat surfaces. This segmentation allows different portions of the signal lines to follow different deformation paths, accommodating multi-directional stretching while maintaining electrical connectivity through the grooved substrate structure
Solution Approach 2:
Signal lines are designed with curved paths that follow the groove contours. These curved geometries enable the signal lines to flex and deform elastically in multiple directions during substrate stretching, preventing wire breakage while maintaining electrical connection to the display elements
3Strength
If grooves are added to the substrate surface to enable multi-directional stretching, then the tensile properties are improved, but the manufacturing process becomes more complex
Solution Approach 1:
The substrate incorporates a grooved structure that creates a porous-like three-dimensional topology on the surface. This porous structure provides multiple deformation pathways for stress distribution during stretching, enhancing tensile properties while the regular patterning of grooves maintains manufacturing feasibility through standardized fabrication processes
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
Enables the display substrate to be stretched in both parallel and perpendicular directions, enhancing its tensile properties and flexibility, thus enriching its application potential in wearable and IoT devices.
Implementation Method 1
a portion of the signal line is located within the grooves... using an elastic insulating material to isolate and route the signal lines
Implementation Method 2
the substrate is made of polydimethylsiloxane for enhanced tensile properties
Data Source
AI summary
A display substrate and a method for manufacturing the same. The display substrate includes a stretchable substrate and a signal line on a first surface of the stretchable substrate. The first surface of the stretchable substrate is provided with a plurality of grooves spaced apart from each other, and the signal line includes a first portion within the grooves and a second portion outside the grooves.