Optical Multi-Layer Structure for 3D Display Surface Hardness
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Solution Overview
Problem
Conventional three-dimensional flat panel display devices lack sufficient surface hardness, particularly in the optical films, which is essential for withstanding external forces and ensuring proper functionality, especially when used in stereoscopic displays where additional polarizing and optical films are required.
Innovation Solution
An optical multi-layer structure comprising a first and second optical layer, a surface strengthening layer, and an adhesive layer is introduced, where the first optical layer converts light into a polarized light, the second optical layer further polarizes it, and the surface strengthening layer enhances the surface hardness, with specific materials like polyvinyl alcohol, cyclo-olefin polymer, and hard coatings used to achieve improved durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If an optical film is adhered onto the polarizing film to convert linear polarized light into circular polarized light for three-dimensional display, then the display functionality is improved, but the surface hardness becomes insufficient (pencil hardness lower than 1 H)
Solution Approach 1:
The patent applies composite materials by combining the optical film with a surface strengthening layer that has superior hardness properties. This composite structure allows the optical film to maintain its light-converting functionality while the surface strengthening layer provides the necessary mechanical hardness (pencil hardness of 3H or higher), thus resolving the contradiction between functional improvement and surface hardness deterioration.
Solution Approach 2:
The patent segments the optical system into distinct functional layers: the optical film for light conversion and the surface strengthening layer for mechanical protection. This segmentation allows each layer to independently fulfill its specific function without compromising the other, enabling the optical film to provide three-dimensional display functionality while the separate surface strengthening layer ensures adequate surface hardness.
2Adaptability or versatility
If multiple optical films and polarizing films are added to achieve three-dimensional display, then the display capability is enhanced, but the device complexity increases
Solution Approach 1:
The patent merges the surface strengthening function with the existing optical film structure by adhering a surface strengthening layer to the optical film. This merging approach consolidates multiple functions (optical conversion and mechanical protection) into an integrated structure, enhancing three-dimensional display capability while avoiding the complexity increase that would result from adding separate independent components for each function.
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 proposed optical multi-layer structure significantly enhances the surface hardness of flat panel display devices, preventing damage from external forces and ensuring reliable operation, particularly in three-dimensional displays by effectively combining materials like polyvinyl alcohol, cyclo-olefin polymer, and hard coatings to secure the optical layers.
Implementation Method 1
The first optical layer converts a light into a first polarized light
Implementation Method 2
The second optical layer is disposed on the first optical layer and converts the first polarized light into a second polarized light
Data Source
AI summary
An optical multi-layer structure for a flat panel display device is provided. The optical multi-layer structure includes a first optical layer, a second optical layer, a surface strengthening layer, and an adhesive layer. The first optical layer converts a light into a first polarized light. The second optical layer is disposed on the first optical layer and converts the first polarized light into a second polarized light. The surface strengthening layer is disposed on the second optical layer. The adhesive layer is disposed between the second optical layer and the surface strengthening layer, and is in direct contact with the second optical layer and the surface strengthening layer. A flat panel display device having the optical multi-layer structure is also disclosed.