Flexible Display Layer Integration for Repeated Bending Durability
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Solution Overview
Problem
Flexible display devices face challenges in durability due to stress and delamination issues when repeatedly bent or flexed, as existing designs often require thick adhesion members to maintain structural integrity, which can lead to increased thickness and reduced flexibility.
Innovation Solution
A flexible display device design that integrates a touch sensing layer and reflection prevention layer directly on the display panel layer, reducing the need for separate adhesion members and thus minimizing thickness, while using a protection member and window member with optimized thickness ratios to enhance durability and flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If thick adhesion members are used to maintain structural integrity during repeated bending, then reliability is improved, but device thickness increases and flexibility deteriorates
Solution Approach 1:
The patent combines the adhesion member and the protective film into a single integrated structure. The protective film serves dual functions as both the protective layer and the adhesion member, eliminating the need for separate thick adhesion layers while maintaining structural integrity during repeated bending operations.
Solution Approach 2:
The patent employs a thin protective film with optimized material properties that provides both protection and adhesion functions. This thin film approach replaces traditional thick adhesion members, reducing overall device thickness while maintaining flexibility and structural integrity during repeated bending.
2Reliability
If multiple separate layers (adhesion members, protective films) are used to ensure durability, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent merges the adhesion member and protective film into a single integrated layer, reducing the total number of layers from multiple separate components to a simplified multi-layer structure where the protective film simultaneously provides protection and adhesion functions.
Solution Approach 2:
The protective film is designed to perform multiple functions simultaneously: it acts as both the protective layer against environmental damage and the adhesion member bonding the display panel to the window member. This multi-functionality eliminates the need for separate dedicated adhesion layers.
Data Source
AI summary
A flexible display device includes a protection member, a first adhesion member, a display member, a second adhesion member, and a window member. A thickness of the display member is less than a sum of thicknesses of the protection member and the window member. The display member includes a display panel layer, a touch sensing layer, and a reflection prevention layer integrated with each other to reduce a thickness of the flexible display device. The reduction in thickness enables the flexible display device to be bent with a relatively small radius of curvature, as well as to be repeatedly bent (or otherwise flexed) with reduced potential for delamination of the first and second adhesion members.