Optical Laminated Body with Multi-Region Phase Difference Layer
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Solution Overview
Problem
In stereoscopic video display units using polarizing glasses, thick phase difference devices can lead to deterioration of 3D characteristics (crosstalk) when viewed from oblique angles, and the addition of anti-glare or antireflection films further exacerbates this issue.
Innovation Solution
An optical laminated body with a phase difference layer having multiple regions with different slow axis directions, integrated with a polarization plate and an antireflection or anti-glare layer, where the polarization plate serves as a base material to reduce thickness and improve 3D characteristics, and a method involving layering and bonding processes to manufacture this configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a thick phase difference device is used, then the structural strength and support capability are improved, but the 3D characteristics (crosstalk) deteriorate when viewed from oblique directions
Solution Approach 1:
The patent combines the phase difference layer, base material, and antireflection/anti-glare layer into a single integrated optical laminated body structure. This merging eliminates the need for a separate thick phase difference device while providing both structural support and optical functionality, thereby maintaining structural strength without compromising 3D characteristics.
Solution Approach 2:
The base material in the patent serves multiple functions: it provides structural support, supports the phase difference layer, and serves as the substrate for the antireflection/anti-glare layer. This multi-functionality allows a single component to fulfill multiple roles that previously required separate thick components, preventing 3D characteristic deterioration.
2Illumination intensity
If anti-glare film or antireflection film is provided on the phase difference device, then video quality is improved, but 3D characteristics (crosstalk) are significantly deteriorated when the phase difference device is thick
Solution Approach 1:
The patent integrates the antireflection/anti-glare layer directly with the base material in a unified laminated structure. This merging allows the optical enhancement features to be applied without adding significant thickness, as they become part of the base material structure rather than separate additions, thereby preserving 3D characteristics while improving video quality.
3Stability of the object's composition
If a separate base material is provided to support the phase difference layer, then the structural stability is improved, but the thickness of the optical laminated body increases
Solution Approach 1:
The base material in the patent is designed to serve multiple purposes simultaneously: it provides structural stability, supports the phase difference layer, and serves as the substrate for the antireflection/anti-glare layer. This multi-functional design eliminates the need for additional separate base materials, thereby maintaining structural stability without increasing overall thickness.
Solution Approach 2:
The patent merges the functions of structural support and optical layer substrate into a single base material component. By combining these functions, the structure achieves the necessary stability without the cumulative thickness that would result from stacking separate base materials and support layers.
4Adaptability or versatility
If multiple separate components are used to achieve the optical functions, then the functional completeness is improved, but the manufacturing complexity and time increase
Solution Approach 1:
The patent combines multiple optical components (phase difference layer, base material, antireflection/anti-glare layer) into a single integrated laminated body. This merging reduces the number of separate components that need to be manufactured and assembled, thereby simplifying the manufacturing process and reducing production time while maintaining complete optical functionality.
Solution Approach 2:
The base material serves multiple functions within the structure, eliminating the need for separate components for structural support and optical layer mounting. This multi-functionality reduces the total number of parts and assembly steps, thereby reducing manufacturing complexity and time while achieving complete optical functionality.
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 decreases the thickness of the optical laminated body and reduces 3D crosstalk deterioration, while also decreasing manufacturing time and cost by using the polarization plate as a dual-purpose base material and eliminating the need for separate base materials.
Implementation Method 1
a polarization plate contacted with a bottom face of the phase difference layer with a bonding layer or an adhesive layer in between
Implementation Method 2
a phase difference layer that changes a light polarization state
Implementation Method 3
an antireflection layer or an anti-glare layer directly contacted with a face not contacted with the phase difference layer of the base material
Data Source
AI summary
An optical laminated body includes a phase difference layer that has two or more kinds of phase difference regions having different directions of a slow axis from each other, a polarization plate contacted with a bottom face of the phase difference layer with a bonding layer or an adhesive layer in between, a base material contacted with a top face of the phase difference layer with a bonding layer or an adhesive layer in between, and an antireflection layer or an anti-glare layer directly contacted with a face not contacted with the phase difference layer of the base material.