Flexible Display Polarizer Adhesive Glass Transition
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Solution Overview
Problem
Flexible display apparatuses face issues with deformation when bent or folded, leading to degradation in display quality due to stress applied to their components.
Innovation Solution
Incorporating a polarizing structure with a λ/4 phase retardation layer, a linear polarizer, and an adhesive layer with a glass transition temperature between 40°C and 150°C to minimize deformation during bending or folding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the flexible display apparatus is bent or folded to achieve shape transformation, then flexibility and adaptability are improved, but deformation of the polarizing member occurs leading to display quality degradation
Solution Approach 1:
The patent changes the glass transition temperature parameter of the adhesive layer to be higher than that of the λ/4 phase retardation layer. This parameter change ensures that during bending or folding, the adhesive layer remains in a glassy state while the liquid crystal layer can deform, preventing the polarizing member from deforming and maintaining display quality while allowing shape transformation.
2Reliability
If the glass transition temperature of the adhesive layer is increased to prevent deformation, then reliability is improved, but the adhesive layer may become too rigid affecting flexibility
Solution Approach 1:
The patent precisely controls the glass transition temperature parameter of the adhesive layer to be higher than the λ/4 phase retardation layer but within a specific range. This parameter optimization allows the adhesive to maintain sufficient rigidity at operating temperatures to prevent deformation while still allowing the overall structure to be flexible and bendable.
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 reduces deformation of the polarizing member, thereby enhancing display quality and maintaining optical properties even under various operating conditions.
Implementation Method 1
The first adhesive structure is an adhesive layer with a glass transition temperature that is greater than or equal to 40° C. and less than or equal to 150° C.
Data Source
AI summary
A flexible display apparatus includes a bending area and a non-bending area. The flexible display apparatus further includes a display panel and a polarizing structure disposed on the display panel. The polarizing structure includes a λ/4 phase retardation layer, a linear polarizer disposed on the λ/4 phase retardation layer, and a first adhesive structure disposed between the λ/4 phase retardation layer and the linear polarizer. The linear polarizer includes a stretched polymer film. The first adhesive structure is an adhesive layer with a glass transition temperature that is greater than or equal to 40° C. and less than or equal to 150° C. Accordingly, deformation of the λ/4 phase retardation layer may be prevented or reduced when the flexible display apparatus is folded or bent, thereby improving display quality.