Protective Film Substrate Protrusion Pattern for Flexible Displays
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Solution Overview
Problem
The repulsive force generated by a hard substrate layer in protective films for flexible displays can cause shape deformation and interrupt operations like rolling or folding, as the substrate's rigidity exceeds that of soft materials, leading to potential damage and operational disruptions.
Innovation Solution
A protective film with a substrate layer featuring a pattern of repeated protrusions and micro-grooves, combined with an adhesive layer containing a refractive index adjustment member, reduces the repulsive force and enhances flexibility, allowing the film to bend or fold with the display without deforming it.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the substrate layer is formed of a hard material to reduce damage to the display, then the protective capability is improved, but the repulsive force generated during rolling or folding increases, causing shape deformation or operational interruption
Solution Approach 1:
The substrate layer is designed as a thin film structure that can flex and deform during rolling or folding operations. This thin film approach maintains the protective function while reducing the repulsive force that would otherwise prevent proper operation of flexible displays
Solution Approach 2:
The thickness of the substrate layer is controlled within a specific range (10-50 μm) to balance protective capability and flexibility. By adjusting this critical parameter, the substrate provides sufficient strength for protection while maintaining enough flexibility to accommodate rolling and folding operations without generating excessive repulsive force
2Strength
If the substrate layer is formed of a hard material to reduce damage to the display, then the protective capability is improved, but the shape of the display may be deformed due to the repulsive force of the substrate layer
Solution Approach 1:
The substrate layer is designed as a thin film structure that can flex and deform during rolling or folding operations. This thin film approach maintains the protective function while reducing the repulsive force that would otherwise prevent proper operation of flexible displays
Solution Approach 2:
The substrate layer is designed to dynamically adapt its shape during operation. It can deform during rolling or folding and then return to its original shape, allowing the display to maintain its proper shape while still receiving protective benefits
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 effectively alleviates shape deformation and operational interruptions by reducing the repulsive force of the substrate layer, enabling smooth rolling or folding of flexible displays while maintaining protection from external forces.
Implementation Method 1
has a refractive index adjustment member mixed therein in order to reduce a refractive index difference with the substrate layer
Data Source
AI summary
An electronic device is provided. The electronic device includes a first housing, a second housing connected to the first housing such that a relative position thereof with respect to the first housing is changeable, a display including a window layer and a display panel disposed under the window layer and including a deformation area deformed as the relative position between the first housing and the second housing is changed, a substrate layer which includes a pattern in which multiple protrusions repeat and is disposed above the window layer, and an adhesive layer which is disposed between the window layer and the substrate layer such that at least a part thereof is disposed between the protrusions of the substrate layer, and has a refractive index adjustment member mixed therein in order to reduce a refractive index difference with the substrate layer.