Stress Compensation Layer for Flexible OLED Substrates
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Solution Overview
Problem
Flexible OLED displays are prone to damage due to stress generated in the substrate when bent, which existing technologies have not adequately addressed.
Innovation Solution
Incorporating a stress compensation layer between adjacent scan lines on the substrate, which can float, overlap, or be positioned between the substrate and scan lines, made of a material with a higher Young's modulus than the insulating layer, to disperse and collect stress, thereby preventing damage to the insulating layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a flexible substrate is used to enable bending, then adaptability is improved, but stress damage to the insulating layer increases
Solution Approach 1:
The patent introduces a stress compensation layer as an intermediary component between the flexible substrate and the insulating layer. This layer has a higher Young's modulus than the insulating layer and serves to compensate for stress generated during substrate bending, thereby protecting the insulating layer from stress damage while maintaining device flexibility.
Solution Approach 2:
The patent changes the mechanical parameter (Young's modulus) of the compensation layer to be higher than that of the insulating layer. This parameter difference enables the compensation layer to resist and balance the stress generated during substrate bending, preventing stress concentration on the insulating layer while allowing the substrate to remain flexible.
2Adaptability or versatility
If the substrate is bent, then adaptability is improved, but stress concentration on the insulating layer increases
Solution Approach 1:
The stress compensation layer acts as a mediator that distributes and reduces stress concentration on the insulating layer during substrate bending. By positioning this layer with appropriate mechanical properties between the substrate and insulating layer, the patent prevents stress concentration while maintaining bending capability.
Solution Approach 2:
The patent modifies the stress distribution by introducing a layer with different mechanical parameters (higher Young's modulus) than the insulating layer. This parameter difference enables the compensation layer to bear and distribute the stress generated during bending, reducing stress concentration on the insulating layer.
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 stress compensation layer effectively disperses and collects stress as the substrate is bent, preventing damage to the insulating layer and ensuring the durability of the display device.
Implementation Method 1
a stress compensation layer positioned between adjacent scan lines among the plurality of scan lines... configured to disperse and collect stress, thereby preventing damage to the insulating layer
Data Source
AI summary
A display device is disclosed. In one aspect, the display device includes a substrate and a plurality of scan lines formed over the substrate and separated from each other in a first direction. The scan lines extend in a second direction crossing the first direction. The display device also includes a stress compensation layer positioned between adjacent ones of the scan lines.