Segmented Protective Patterns for Flexible Display Stress Reduction
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Solution Overview
Problem
Flexible display devices face damage when folded due to the thickness of protective films causing them to contact and collide, leading to potential damage during bending or rolling.
Innovation Solution
A display device structure with protective patterns spaced apart on a base layer, including a light emitting element layer and a circuit board, where the protective patterns are designed to absorb impact and maintain flexibility, reducing stress and damage during folding or rolling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a protective film is used to protect the display panel, then protection is improved, but damage occurs when folded due to thickness causing contact and collision
Solution Approach 1:
The protective film is divided into multiple protective patterns spaced apart from each other on the base layer. This segmentation allows the display panel to be folded without the protective film contacting and damaging itself, while still providing protection where needed. The spaced-apart patterns reduce stress concentration during bending.
Solution Approach 2:
Protective patterns are selectively positioned at specific locations on the base layer rather than providing uniform protection across the entire surface. This local quality approach provides protection in critical areas while maintaining flexibility in folding regions.
2Reliability
If the protective film is made thicker to improve protection, then protection is improved, but flexibility is reduced causing damage during folding
Solution Approach 1:
By segmenting the protective film into spaced-apart patterns, the invention maintains protection where needed while allowing flexibility in folding regions. The gaps between patterns enable the film to bend and fold without stress concentration.
Solution Approach 2:
The protective patterns are strategically positioned to provide local protection in critical areas while maintaining overall flexibility. The varying density and positioning of patterns create regions of different protection levels adapted to functional requirements.
Data Source
AI summary
A display device includes a base layer including first and second portions, and a third portion between the first and second portions and configured to be bent, folded, or rolled, a light emitting element layer on one surface of the base layer at the first portion, and including light emitting elements, a circuit board on the one surface of the base layer at the third portion, and electrically connected to the light emitting elements, protective patterns spaced apart from each other on another surface of the base layer, including a resin, and also including first protective patterns spaced apart from each other on the other surface of the base layer at the first portion, and at least one second protective pattern on the other surface of the base layer at the second portion, and at least one of a heat dissipation layer or a cushion layer below the protective patterns.