Flexible Display Protection Layer Modulus Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing display devices with flexible substrates face challenges in effectively protecting the bending parts from external impacts and fractures, as current protection layers either lack sufficient strength or become brittle due to high modulus values.
Innovation Solution
A display device with a protection layer made of acrylic-based, silicon-based, or imide-based polymers, applied using a method involving a preliminary protection layer formation followed by additional curing to achieve a modulus value of 500 MPa to 1200 MPa, ensuring flexibility and impact resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a protection layer with high modulus value is used to protect the bending part, then impact resistance and strength are improved, but the protection layer becomes brittle and loses flexibility
Solution Approach 1:
The patent applies parameter changes by precisely controlling the modulus value of the protection layer to fall within the specific range of 500 MPa to 1200 MPa. This parameter optimization allows the protection layer to achieve sufficient impact resistance while maintaining flexibility, resolving the contradiction between strength and adaptability.
Solution Approach 2:
The patent employs composite materials by combining multiple polymer components in the protection layer formulation. This composite approach enables the protection layer to simultaneously achieve both strength and flexibility, as the different polymer components contribute different mechanical properties that complement each other.
2Reliability
If a protection layer is applied to protect the bending part, then fracture resistance is improved, but manufacturing defects may occur during the manufacturing process
Solution Approach 1:
The patent applies preliminary action by forming a preliminary protection layer before final assembly and then performing additional curing after bending. This two-stage approach allows the protection layer to be partially formed and adjusted during manufacturing, reducing defects, and then completed after the bending process to ensure proper protection without manufacturing complications.
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 solution provides a display device with a protection layer that effectively minimizes fractures and maintains flexibility, offering sufficient impact resistance and strength to protect the bending parts without compromising the display device's mechanical properties.
Implementation Method 1
a protection layer disposed on the non-display area and having a modulus value of about 500 MPa to about 1,200 MPa
Implementation Method 2
The protection layer may include an acrylic-based polymer, a silicon-based polymer, an imide-based polymer, or a combination thereof
Data Source
AI summary
A method for manufacturing a display device including providing a protection resin having a base resin, a first initiator, and a second initiator to the non-display area, irradiating light having a first wavelength region to the protection resin to form a preliminary protection layer, bending the flexible substrate so that the bending part has a first curvature radius, and additionally curing the preliminary protection layer to form a protection layer.