Cover Window Composite for Flexible Display Panels
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Solution Overview
Problem
Current display apparatuses lack sufficient flexibility and durability, particularly in mobile electronic devices, as they are prone to cracking under external forces and do not effectively manage deformation during contraction and stretching.
Innovation Solution
A display apparatus with a display panel featuring a cover window composed of a first member with high modulus materials like glass or polyimide and a second member with low modulus materials like TPU or PDMS, arranged in specific opening patterns to enhance elasticity and wear resistance, allowing for improved flexibility and protection against external forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a rigid cover window material is used, then wear resistance is improved, but flexibility and resistance to cracking under external forces deteriorates
Solution Approach 1:
The cover window is constructed as a composite structure with a first member (high modulus material like glass or polyimide) providing wear resistance and a second member (low modulus material like TPU or PDMS) providing flexibility and crack resistance. This composite material approach resolves the contradiction by combining materials with complementary properties.
Solution Approach 2:
Different regions of the cover window have different material properties - the first member provides hard wear-resistant surfaces while the second member provides soft flexible regions. This local differentiation of material quality allows the cover window to simultaneously achieve wear resistance and flexibility.
2Reliability
If the cover window is made flexible, then resistance to cracking is improved, but wear resistance deteriorates
Solution Approach 1:
The composite structure combines a flexible second member that prevents cracking with a rigid first member that provides wear resistance. Each material performs its specialized function, resolving the contradiction between flexibility and wear resistance.
3Device complexity
If a single material is used for the cover window, then device complexity is reduced, but the ability to manage deformation during contraction and stretching deteriorates
Solution Approach 1:
The two-member composite structure enables differential deformation management - the first member maintains structural integrity while the second member accommodates stretching and contracting movements. This resolves the contradiction by providing specialized deformation management for each material type.
Solution Approach 2:
The cover window is segmented into two functional members with distinct properties, allowing each to manage different aspects of deformation. This segmentation enables sophisticated deformation management while keeping the overall structure relatively simple.
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 apparatus with high elasticity and enhanced wear and impact resistance, enabling it to stretch and contract without cracking, while maintaining optical characteristics and protecting the underlying display panel.
Implementation Method 1
a modulus of the first member is greater than a modulus of the second member... provides a display apparatus with high elasticity and enhanced wear and impact resistance, enabling it to stretch and contract without cracking
Data Source
AI summary
A display apparatus includes: a display panel including a display portion and a plurality of connection portions connected to the display portion and extending in different directions; and a cover window disposed on the display panel. The cover window includes: a first member defining a plurality of opening patterns therein; and a second member disposed in the plurality of opening patterns, and a modulus of the first member is greater than a modulus of the second member.