Flexible Display Adhesive with Elastic Microspheres
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Flexible display devices face high failure rates and limitations in separation between elements due to bending, leading to reduced durability and convenience.
Innovation Solution
A flexible display device design incorporating a first and second flexible member with adhesive parts and non-adhesive elastic materials, allowing for adjustable adhesive strength and area based on bending mode, minimizing separation and failure during bending and unbending.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If adhesive material is used to bond flexible members during bending, then adhesion is maintained, but separation and failure occur due to bending stress
Solution Approach 1:
The adhesive member is constructed as a composite material combining an adhesive polymer matrix with dispersed elastic microspheres. This composite structure allows the adhesive to maintain bonding strength while accommodating bending-induced stress through the elastic deformation of microspheres, preventing separation between flexible members during repeated bending cycles.
Solution Approach 2:
The adhesive properties are dynamically adjusted by changing the physical state of elastic microspheres within the adhesive material. During bending, the microspheres deform elastically to reduce adhesive strength and prevent separation; during unbending, they return to original state to restore adhesive strength, thus adapting to different operational states.
2Strength
If adhesive strength is increased to prevent separation, then bonding is improved, but flexibility and bending capability are reduced
Solution Approach 1:
The adhesive member transitions from a static adhesive structure to a dynamic one where elastic microspheres can deform and rebound. This dynamic behavior allows the adhesive to adjust its effective strength based on bending conditions - becoming more compliant during bending and restoring full strength during unbending, thus maintaining both adhesion and flexibility.
Solution Approach 2:
The physical parameters of the adhesive material are changed by incorporating elastic microspheres that can alter their volume and shape. This enables the adhesive to change its effective modulus and bonding characteristics in response to bending stress, maintaining optimal performance across different operational states.
3Adaptability or versatility
If flexible members are repeatedly bent and unbent, then flexibility is demonstrated, but failure rate increases
Solution Approach 1:
The elastic microspheres act as pre-positioned cushioning elements within the adhesive structure. Before bending-induced failure can occur, these microspheres deform to absorb and distribute stress, cushioning the adhesive-bonded interface against separation and damage during repeated bending cycles.
Solution Approach 2:
The adhesive material's physical parameters are dynamically adjusted through elastic microsphere deformation during each bending cycle. This continuous parameter change allows the adhesive to maintain optimal bonding characteristics throughout repeated flexing, preventing cumulative damage and reducing failure rate.
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 the durability and convenience of flexible display devices by reducing separation and failure rates during repeated bending and unbending, maintaining adhesion through elastic material deformation and re-adhesion.
Implementation Method 1
a plurality of first non-adhesive elastic materials dispersed in the first adhesive material, wherein at least one of the first non-adhesive elastic materials may be partially exposed on at least one of the top surface or the bottom surface of the first adhesive member
Implementation Method 2
The average height of the first non-adhesive elastic materials in the first adhesive part in the first mode may be lower than an average height of the first non-adhesive elastic materials in the first adhesive part in the second mode
Implementation Method 3
a first adhesive member between the first flexible member and the window, and including a first adhesive part overlapping the bending part, a second adhesive part overlapping the non-bending part, a first adhesive material
Data Source
AI summary
A flexible display device including a first flexible member including a bending part and a non-bending part, a window on a top surface or a bottom surface of the first flexible member, and a first adhesive member between the first flexible member and the window, and including a first adhesive part overlapping the bending part, a second adhesive part overlapping the non-bending part, a first adhesive material, and a plurality of first non-adhesive elastic materials dispersed in the first adhesive material, wherein at least one of the first non-adhesive elastic materials may be partially exposed on at least one of the top surface or the bottom surface of the first adhesive member.