Touch Display Adhesive Layer Stress Dispersion
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Solution Overview
Problem
Flexible display panels face misalignment and stress concentration issues during bending, leading to potential deformation or breakage of circuit lines due to inadequate stress dispersion in existing touch display devices.
Innovation Solution
A touch display device with a support structure featuring an adhesive layer configured to disperse stress, comprising strip-shaped adhesive structures with varying widths and moduli, and a second base layer with a slope design to decompose bending stress, reducing concentration at fixed positions and enhancing circuit line stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If the circuit areas and components are bent to achieve narrow bezel design and appearance assembly, then the appearance design and narrow bezel are improved, but stress concentration and misalignment occur during bending leading to potential circuit line deformation or breakage
Solution Approach 1:
The adhesive layer is divided into multiple strip-shaped adhesive structures arranged at intervals, with gaps between adjacent strips. This segmentation allows stress to be distributed across multiple discrete bonding points rather than concentrated at a single continuous bond, reducing stress concentration on circuit lines during bending while maintaining the bent appearance design.
Solution Approach 2:
The adhesive layer has different properties in different regions: the strip-shaped adhesive structures provide localized bonding at specific positions, while the gaps between strips create non-adhesive regions that allow stress relief. This local differentiation enables the adhesive layer to simultaneously maintain structural integrity and accommodate bending stress without concentrating force on circuit lines.
2Strength
If a continuous adhesive layer is used to bond the support structure, then bonding strength is improved, but stress concentration occurs at fixed positions during bending
Solution Approach 1:
The continuous adhesive layer is segmented into multiple discrete strip-shaped adhesive structures spaced at intervals. This segmentation maintains bonding strength at the adhesive structures while creating gaps that prevent stress concentration at fixed positions during bending, allowing the support structure to flex without transmitting concentrated stress to the circuit lines.
Solution Approach 2:
The gaps between adjacent adhesive strips act as intermediary stress-relief zones. These non-adhesive regions serve as mediators that absorb and distribute bending stress, preventing direct transmission of concentrated stress to the circuit lines while still maintaining sufficient bonding through the strip-shaped adhesive structures.
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 disperses stress generated during bending, reducing the risk of deformation or breakage of circuit lines and improving the stability and reliability of the circuit area, while maintaining device performance.
Implementation Method 1
The adhesive layer is provided with a structure configured to disperse stress generated by the display panel during bending
Implementation Method 2
an adhesive layer located between the support layer and the second protective layer
Data Source
AI summary
The present disclosure relates to a touch display device including a display panel and a support structure. The display panel includes a display portion, a bent portion and a fixed portion. The bent portion is located between the display portion and the fixed portion, and the fixed portion is bent, through the bent portion, to a back side of the display portion. The support structure includes a first protective layer and a second protective layer oppositely arranged and located between the display portion and the fixed portion, a support layer located between the first protective layer and the second protective layer, and an adhesive layer located between the support layer and the second protective layer. The adhesive layer is provided with a structure configured to disperse stress generated by the display panel during bending.