Stretchable Display Substrate Layout for Overstretch Suppression
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Solution Overview
Problem
Existing display devices lack the ability to suppress excessive stretching, which can lead to erroneous operation of light emitting diodes, and have a high number of connection lines that hinder stretching rate improvement.
Innovation Solution
A stretchable display device with a lower substrate divided into areas for conductive patterns, pixels, and connection lines, and an upper substrate with overlapping conductive patterns, reducing the number of lower substrate connection lines to prevent excessive stretching and ensure reliable operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the number of connection lines on the lower substrate is reduced, then the stretching rate is improved, but the reliability of suppressing excessive stretching may be compromised
Solution Approach 1:
The patent transitions from a single-substrate design to a dual-substrate configuration where the upper substrate is positioned above the lower substrate. This dimensional change allows the upper substrate to provide excessive stretching suppression functionality without adding connection lines to the lower substrate, thus improving stretching rate while maintaining reliability.
Solution Approach 2:
The upper substrate acts as an intermediary element that mediates the excessive stretching suppression function. Instead of relying solely on the lower substrate's connection lines, the upper substrate provides an additional mechanism for suppression, reducing the burden on the lower substrate's connection line network.
2Adaptability or versatility
If the display device is made stretchable with flexible substrates, then adaptability and form variability are improved, but the risk of excessive stretching and LED malfunction increases
Solution Approach 1:
The patent implements beforehand cushioning by pre-configuring the upper substrate as a protective element that prevents excessive stretching before it can cause LED malfunction. This proactive measure cushions against potential damage while maintaining the stretchable nature of the display device.
Solution Approach 2:
The patent changes the structural parameters by introducing a dual-substrate configuration with specific spacing and alignment relationships. This parameter change enables the device to maintain stretchability while establishing a mechanical constraint system that prevents excessive stretching through the interaction between upper and lower substrates.
Data Source
AI summary
A display device includes a lower substrate which is stretchable and is divided into a first area, a second area, and a third area; a plurality of lower conductive patterns disposed on the first area of the lower substrate; a plurality of pixels which is disposed on the second area of the lower substrate; a plurality of lower connection lines which is disposed on the third area of the lower substrate and is connected to at least one the plurality of pixels; an upper substrate which is opposite to the lower substrate and is stretchable; and a plurality of upper conductive patterns which is disposed below the upper substrate and is overlapped with the plurality of lower conductive patterns. By doing this, the excessive stretching of the display device can be suppressed or controlled.