Flexible Display Substrate with Elastic Portions for Load Dispersion
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Solution Overview
Problem
Flexible display devices face challenges in dispersing concentrated loads and maintaining durability while avoiding visible boundaries in opening or folding areas, which affects their display quality and structural integrity.
Innovation Solution
A flexible display device design featuring a composite first substrate with rigid portions and an elastic portion, where the rigid portions are embedded within the elastic substrate, providing enhanced rigidity and load dispersion without visible opening patterns, allowing for flexible operation and improved durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a flexible display device uses a plastic thin film transistor substrate instead of glass, then durability and flexibility are improved, but the ability to disperse concentrated loads is reduced
Solution Approach 1:
The patent applies composite materials by combining a plastic thin film transistor substrate with a support substrate having an opening pattern. The support substrate provides enhanced mechanical strength and load dispersing capability while the plastic substrate maintains flexibility and durability. This composite structure resolves the contradiction by integrating materials with complementary properties.
Solution Approach 2:
The support substrate is designed with an opening pattern that segments the structure into multiple regions. This segmentation allows the support substrate to effectively disperse concentrated loads across multiple contact points while maintaining overall flexibility. The openings create a distributed support system rather than a single rigid structure.
2Strength
If opening patterns are used in the support substrate, then load dispersal is improved, but visible boundaries appear on the display panel
Solution Approach 1:
The adhesive unit is designed with different properties in different regions: it has high adhesion strength in areas where the support substrate contacts the plastic substrate to ensure load transfer, while being transparent or matching the display panel appearance in visible areas. This local differentiation of adhesive properties allows the opening pattern to function mechanically without being visually apparent.
Solution Approach 2:
The adhesive unit acts as an intermediary between the support substrate and the plastic substrate. It bonds these layers together while being positioned to hide the boundaries created by the opening pattern. The adhesive layer serves as a visual mediator that conceals the structural openings from the front surface view.
Data Source
AI summary
A flexible display device includes a display panel configured to display an image; and a first substrate on the display panel and supporting the display panel, the first substrate including a plurality of first portions extending in a first direction and a second portion between the plurality of first portions that is more elastic than the plurality of first portions, the adhesive unit bonding together the display panel and the first substrate, each of the plurality of first portions includes a flat portion that faces the display panel and a curved portion connected to the flat portion and protruding in a direction away from the flat portion.