OLED Display Penetrated Substrate Stress Distribution
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Solution Overview
Problem
Conventional OLED displays face challenges in achieving transparency and flexibility while minimizing stress concentration due to bending, which can lead to component damage.
Innovation Solution
Incorporating a penetrated portion as a light transmissive part in the OLED display, which allows light to pass through and distributes stress across the substrate, reducing the concentration of stress on specific regions, and includes a flexible substrate with a matrix arrangement of penetrated portions, thin film transistors, insulating layers, and a thin film encapsulation layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a conventional OLED display structure is used to achieve transparency, then light transmission is improved, but stress concentration occurs due to bending which reduces reliability
Solution Approach 1:
The substrate is divided into multiple penetrated portions (holes) arranged in a matrix pattern rather than a single continuous structure. This segmentation allows stress to be distributed across multiple discrete locations rather than concentrating in one area, while still maintaining overall light transmission through the display panel.
Solution Approach 2:
The substrate incorporates a porous structure with multiple penetrated portions that allow light to pass through while providing stress relief pathways. The porous design enables the material to flex and bend without creating high stress concentrations, combining optical transparency with mechanical flexibility.
2Adaptability or versatility
If the substrate is made flexible to improve adaptability, then ease of operation is improved, but stress concentration on specific regions increases which harms reliability
Solution Approach 1:
The flexible substrate is segmented into multiple regions with penetrated portions distributed across the surface. This segmentation allows the substrate to flex and bend more easily while preventing stress from concentrating in any single location, as the stress is distributed across the segmented structure.
Solution Approach 2:
The substrate utilizes a thin film structure with penetrated portions that provides both flexibility and stress distribution. The thin film design allows the substrate to bend and conform to different shapes while the penetrated portions prevent stress concentration, enabling reliable flexible display operation.
3Reliability
If insulating layers are extended to cover side walls of the substrate to protect components, then reliability is improved, but device complexity increases
Solution Approach 1:
The insulating layers are extended to cover the side walls of the substrate, merging the protection function into the existing layer structure. This integration provides comprehensive component protection without adding separate protective structures, maintaining relatively simple device architecture while improving reliability.
Data Source
AI summary
An organic light emitting diode (OLED) display includes a substrate including a penetrated portion positioned in a display area for displaying an image and a light emission region neighboring the penetrated portion. The OLED display also includes an OLED positioned on the light emission region of the substrate.