PET Polarizer Concave-Convex Structure for Rainbow Pattern Elimination
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Solution Overview
Problem
The rainbow pattern phenomenon in display devices is caused by the birefringence effect of polyethylene terephthalate (PET) in polarizers due to its crystalline properties, leading to selective light transmittance at different wavelengths.
Innovation Solution
A polarizer with a protective layer featuring a concave-convex structure and a dimming film with irregular concave-convex surfaces of varying shapes and sizes, incorporating first and second diffusion particles, is used to evenly scatter and disperse light intensity and energy, preventing rainbow patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a PET substrate protective layer is used in the polarizer, then the polarizer provides good protection and durability, but the crystallization characteristics of PET material cause birefringence effect leading to rainbow pattern phenomenon
Solution Approach 1:
The patent applies local quality by introducing a concave-convex structure specifically on the surface of the PET protective layer. This localized structural modification creates light scattering centers that disrupt the birefringence effect and eliminate rainbow patterns, while the bulk PET material maintains its protective and durable characteristics.
Solution Approach 2:
The patent creates a composite structure by combining the PET substrate with a concave-convex surface structure. This composite design integrates the protective properties of PET with the light scattering functionality of the concave-convex geometry, achieving both protection and elimination of rainbow patterns simultaneously.
2Ease of manufacture
If a flat protective layer is used, then the manufacturing process is simple, but light passes through uniformly causing rainbow patterns due to birefringence
Solution Approach 1:
The patent applies curvature by introducing a concave-convex structure on the protective layer surface. This curved surface geometry creates multiple light scattering paths that disrupt the uniform light transmission causing rainbow patterns, while remaining compatible with conventional manufacturing processes.
Solution Approach 2:
The patent transitions from a two-dimensional flat protective layer to a three-dimensional concave-convex structure. This dimensional change adds light scattering functionality to the protective layer, eliminating rainbow patterns while maintaining manufacturing feasibility through established coating or molding techniques.
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 concave-convex structure effectively diffuses light, ensuring uniform intensity and energy distribution across wavelengths, thereby eliminating the rainbow pattern phenomenon in display devices.
Implementation Method 1
The concave-convex structure effectively diffuses light, ensuring uniform intensity and energy distribution across wavelengths
Implementation Method 2
Due to the crystallization characteristics of PET material, a birefringence effect is formed, which can easily lead to a rainbow pattern phenomenon in the display
Data Source
AI summary
The present disclosure is directed to a polarizer and a preparation method thereof, and a display panel, to alleviate the technical problem of rainbow pattern phenomenon in existing display devices. In response to the problem of rainbow stripes in existing display devices, poly ethylene terephthalate (PET) in polarizers exhibits anisotropy after being extended into a film due to its crystalline properties, resulting in birefringence when light passes through PET.