Flexible Display Insulating Patterns for Stress Relief
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Solution Overview
Problem
Conventional flexible display apparatuses are prone to deformation or damage when bent or folded due to stress on the bent or folded portions, leading to reduced durability.
Innovation Solution
A flexible display apparatus with a bending area and non-bending areas, featuring a substrate with insulating patterns and wirings arranged in a way that relieves stress through separate areas and a protective layer, allowing the apparatus to be bent or folded without damaging the insulating patterns and wirings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the display apparatus is made flexible to enable bending or folding, then portability and adaptability are improved, but the durability and structural integrity deteriorate due to stress concentration at bent portions
Solution Approach 1:
The display apparatus is divided into a bending area and a non-bending area, with the bending area further segmented into multiple regions separated by insulating patterns. This segmentation allows the bending area to flex while the non-bending area maintains structural integrity, resolving the contradiction between flexibility and durability.
Solution Approach 2:
Different regions of the display apparatus are assigned different functional properties: the bending area is designed to be flexible with separated insulating patterns to accommodate stress, while the non-bending area maintains continuous insulating patterns for structural stability. This local differentiation enables the device to achieve both flexibility where needed and durability where required.
2Reliability
If insulating patterns are made continuous to ensure electrical isolation, then electrical reliability is improved, but stress concentration increases during bending leading to potential damage
Solution Approach 1:
The insulating patterns in the bending area are segmented into separate regions rather than being continuous. This segmentation reduces stress concentration during bending while maintaining adequate electrical isolation between adjacent wirings, as the separation is sufficient to prevent electrical breakdown under flexing conditions.
Solution Approach 2:
The insulating patterns are designed with extended length in the bending direction, creating a dimensional advantage where the longitudinal extension provides both electrical isolation and stress relief through the separated structure, effectively addressing both electrical and mechanical requirements.
3Ease of manufacture
If wirings are made straight and simple to reduce manufacturing complexity, then manufacturing ease is improved, but stress distribution is poor leading to increased damage risk during bending
Solution Approach 1:
The wirings in the bending area are designed with uneven, dynamic shapes that can accommodate flexing movements, rather than rigid straight lines. These curved and irregular wiring paths naturally distribute stress more evenly during bending, improving reliability while remaining compatible with standard manufacturing processes.
Data Source
AI summary
A flexible display apparatus includes a flexible substrate having a bending area, and a non-bending area adjacent the bending area, and having a display area for realizing a visible image, a plurality of wirings at the bending area, and a plurality of insulating patterns between the flexible substrate and the plurality of wirings, wherein respective ones of the plurality of insulating patterns are separated by separate areas.