Stretchable Display Polarizing Layer Material Alignment
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Solution Overview
Problem
Conventional stretchable display devices face challenges in minimizing damage to polarizing layers when stretched and in reducing external light reflection, while also maintaining flexibility and thickness reduction.
Innovation Solution
A stretchable display device design featuring a polarizing layer with a phase delay layer and a linear polarizing plate, where the phase delay layer includes a reactive mesogen dispersed in a first base polymer and the linear polarizing plate includes a dye dispersed in a second base polymer, aligned in different directions, and the same material as the substrates, allowing for flexible bonding and reduced thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional polarizing layer is used in a stretchable display device, then the device can achieve basic polarization function, but the polarizing layer suffers damage when the device is stretched
Solution Approach 1:
The patent changes the material parameters of the polarizing layer by incorporating reactive mesogens into a flexible polymer matrix. This chemical composition change allows the polarizing layer to undergo reversible deformation during stretching while maintaining its polarization function, thus improving both reliability during stretching and adaptability to stretchable configurations.
Solution Approach 2:
The patent creates a composite polarizing layer by combining reactive mesogens (for polarization function) with a flexible polymer base material (for stretchability). This composite structure enables the layer to simultaneously achieve damage resistance during stretching and adaptability to various stretched configurations, resolving the contradiction between reliability and versatility.
2Object-affected harmful factors
If a stretchable polarizing layer is implemented with aligned reactive mesogens and dyes, then external light reflection is reduced, but the manufacturing complexity increases
Solution Approach 1:
The patent applies local quality by creating specific directional alignment of reactive mesogens and dyes within the polarizing layer. This localized orientation control in specific regions of the material reduces external light reflection through constructive interference, while the alignment can be achieved through controlled manufacturing processes rather than complex overall structure design.
Solution Approach 2:
The patent changes the optical parameters of the polarizing layer by controlling the molecular orientation of reactive mesogens and dyes. This parameter change (molecular alignment) directly reduces external light reflection, while the alignment can be achieved through relatively simple manufacturing techniques such as uniaxial stretching or controlled deposition, avoiding excessive manufacturing complexity.
3Strength
If different materials are used for substrates and polarizing layers, then material optimization is achieved, but bonding strength and thickness reduction are compromised
Solution Approach 1:
The patent applies homogeneity by using the same base polymer material for both the substrate and the polarizing layer. This material uniformity ensures strong bonding between the layers without requiring additional adhesive interfaces, while still allowing different functional components (reactive mesogens, dyes) to be incorporated into the polarizing layer for optimized performance.
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 enables the stretchable display device to minimize damage to the polarizing layer during stretching, reduce external light reflection, and achieve a thinner, more flexible design by aligning reactive mesogens and dyes in specific directions and using the same material for substrates and polarizing layers.
Implementation Method 1
the phase delay layer includes a reactive mesogen dispersed in a first base polymer
Implementation Method 2
the linear polarizing plate includes a dye dispersed in a second base polymer
Data Source
AI summary
A stretchable display device comprises a lower substrate, a plurality of island substrates disposed on the lower substrate and spaced apart from each other, a plurality of display elements disposed on the plurality of island substrates, a plurality of connecting lines disposed between each of the plurality of island substrates, an upper substrate disposed on the lower substrate, the plurality of display elements and the plurality of connecting lines, and a polarizing layer disposed on the upper substrate and including a phase delay layer on the upper substrate and a linear polarizing plate on the phase delay layer, wherein the phase delay layer includes a first base polymer, wherein the linear polarizing plate includes a second base polymer, and wherein the first and second base polymers include a same material as the upper substrate.