Foldable Display Window Resin Layering for Recessed Hinge Reliability
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Solution Overview
Problem
Existing window manufacturing technologies do not adequately address the need for improved folding reliability and durability in flexible display devices, which are prone to structural weaknesses during folding and unfolding operations.
Innovation Solution
A window manufacturing apparatus and method that involves forming a resin layer on a base substrate with a recessed part, using a stage with specific angled surfaces to enhance folding reliability by ensuring the resin layer adheres uniformly and maintains structural integrity during folding and unfolding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a resin layer is formed on a flat base substrate, then the manufacturing process is simple, but the folding reliability is poor
Solution Approach 1:
The base substrate is designed with a recessed part specifically at the folding part, creating local structural differentiation. This recessed structure concentrates the resin layer at the folding region, providing enhanced flexibility and folding reliability without complicating the entire substrate structure.
Solution Approach 2:
The recessed part is pre-formed on the base substrate before resin layer formation. This preliminary structural preparation ensures that when the resin layer is subsequently formed, it naturally concentrates in the folding region, preemptively addressing the folding reliability issue before the actual folding operation occurs.
2Manufacturing precision
If the resin layer is applied uniformly across the entire base substrate, then the application process is simple, but the adhesion uniformity is poor
Solution Approach 1:
The recessed part creates a localized region where the resin layer naturally concentrates during the application process. This local structural feature ensures that the resin is preferentially deposited in the folding part, achieving uniform adhesion in the critical folding region without requiring complex application techniques.
Solution Approach 2:
The recessed part introduces a curved surface geometry that facilitates uniform resin distribution through capillary action and surface tension effects. The curved geometry of the recessed region ensures consistent resin thickness and adhesion in the folding part, overcoming the limitations of flat surface application.
3Stability of the object's composition
If the base substrate is made thinner to improve flexibility, then the flexibility increases, but the structural integrity deteriorates
Solution Approach 1:
The recessed part is strategically positioned at the folding region, creating local structural variation. This allows the substrate to maintain overall thinness for flexibility while providing enhanced resin concentration and structural reinforcement specifically where folding stresses occur, preserving structural integrity at the critical location.
Solution Approach 2:
The combination of the thin base substrate and the resin layer forms a composite structure. The recessed part enhances this composite effect by concentrating the resin material at the folding part, creating a locally reinforced composite structure that maintains both flexibility and structural integrity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The method enhances the folding reliability and durability of windows in flexible display devices by ensuring the resin layer adheres uniformly and maintains structural integrity during folding and unfolding operations, thereby improving the overall performance and longevity of the devices.
Implementation Method 1
ensuring the resin layer adheres uniformly and maintains structural integrity during folding and unfolding
Data Source
AI summary
A method for manufacturing a display device includes providing a base substrate including a folding part, a first non-folding part, and a second non-folding part, and in which a recessed part is defined in correspondence to the folding part. The method includes forming a resin layer disposed in at least the recessed part, and the forming includes providing a stage including a first part including a curved surface, a second part extending from a side of the first part and including a first flat surface, and a third part extending from an opposite side of the first part and including a second flat surface defining a first angle with the first flat surface. The forming of the resin layer includes forming a preliminary resin layer on the stage, seating the base substrate on the stage, curing the preliminary resin layer, and separating the stage from the base substrate.