Shock-Absorbing Panel Design for Flexible Display Impact Resistance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Flexible display devices face challenges in maintaining folding properties while ensuring adequate impact resistance, as existing shock-absorbing panels may be vulnerable to external shocks or difficult to repeatedly fold and unfold due to modulus and thickness limitations.
Innovation Solution
A display device design incorporating a shock-absorbing panel with a Young's modulus of 700 MPa to 1200 MPa, featuring a support film with a higher modulus than the buffer layer, and optionally a sub support film, which together absorb and disperse shocks, protecting the display panel and window without significantly increasing device thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a shock-absorbing panel with high Young's modulus is used to improve impact resistance, then the impact resistance is improved, but the folding properties deteriorate
Solution Approach 1:
The shock-absorbing panel is segmented into multiple functional layers: a support film (1200-2000 MPa) for structural integrity, a buffer layer (10-30 MPa) for shock absorption, and optionally a sub support film (3000-4000 MPa) for enhanced protection. This segmentation allows each layer to perform its specific function while maintaining overall flexibility for folding operations.
Solution Approach 2:
The shock-absorbing panel uses composite material structure combining polymers (support film and buffer layer) with glass substrate (window). The buffer layer material has lower modulus than the support film, creating a gradient composite structure that optimizes both shock absorption and structural support while maintaining foldability.
2Strength
If the thickness of the shock-absorbing panel is increased to improve impact resistance, then the impact resistance is improved, but the device thickness increases
Solution Approach 1:
Different regions of the shock-absorbing panel have different thicknesses and material properties optimized for their specific functions. The support film (35-45 μm) is thicker than the buffer layer (20-30 μm) to provide structural support, while the buffer layer is positioned to maximize shock absorption. This local optimization achieves high impact resistance with minimal overall thickness (60-80 μm).
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 design enhances impact resistance and maintains reliable folding properties by optimizing the modulus and thickness of the shock-absorbing panel components, preventing damage to the window and display panel from external shocks while allowing for easy folding and unfolding.
Implementation Method 1
a shock-absorbing panel above the display panel, having a Young's modulus of about 700 MPa to about 1200 MPa with respect to a strain of about 0.025% to about 0.5%
Implementation Method 2
The support film may have a greater Young's modulus than the buffer layer. With respect to the strain, the support film may have a Young's modulus of about 1200 MPa to about 2000 MPa. With respect to the strain, the buffer layer may have a Young's modulus of about 10 MPa to about 30 MPa.
Data Source
AI summary
Provided is a display device including a display panel, a shock-absorbing panel above the display panel, having a Young's modulus of about 700 MPa to about 1200 MPa with respect to a strain of about 0.025% to about 0.5%, and including a support film, and a buffer layer below the support film, and a window above the shock-absorbing panel, and including a glass substrate.