High-Storage-Modulus Adhesive in Stereoscopic Optical Laminates
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Solution Overview
Problem
Conventional stereoscopic image display apparatuses suffer from limited resolution and contrast ratio due to defects like lifting and bubbling at the pancake lens, and light leakage at the screen's edge, which are not adequately addressed by existing technologies.
Innovation Solution
An optical laminate for stereoscopic image display apparatuses comprising a negative dispersion retardation layer, a first adhesive layer with a storage modulus of 1×10^6 Pa or more, and a reflective polarizer, which improves bonding to the pancake lens, enhancing contrast ratio and resolution while eliminating light leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a conventional pancake lens assembly is used, then the device can display stereoscopic images, but the resolution and contrast ratio are limited due to lifting and bubbling defects
Solution Approach 1:
The patent changes the storage modulus parameter of the adhesive layer from conventional low values to 1×10^6 Pa or more, which fundamentally improves bonding quality and eliminates lifting and bubbling defects, thereby resolving the contradiction between manufacturing precision and reliability
Solution Approach 2:
The patent uses a composite structure combining a negative dispersion retardation layer with high storage modulus adhesive layer and reflective polarizer, where each material is selected and optimized to achieve both defect-free bonding and high image quality, resolving the contradiction between manufacturing precision and reliability
2Ease of manufacture
If conventional adhesive layers are used, then the optical laminate can be assembled, but lifting and bubbling defects occur reducing bonding reliability
Solution Approach 1:
The patent fundamentally changes the storage modulus parameter of the adhesive layer to 1×10^6 Pa or more, which maintains ease of assembly while dramatically improving bonding reliability and eliminating lifting and bubbling defects
3Ease of operation
If conventional optical laminate structure is used, then the device can function, but light leakage occurs at the screen edge
Solution Approach 1:
The patent employs a composite optical laminate structure with specifically selected materials (negative dispersion retardation layer, high storage modulus adhesive layer, reflective polarizer) that work together to eliminate light leakage at the screen edge while maintaining full device 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 optical laminate effectively prevents defects such as lifting and bubbling, improves contrast ratio and resolution, and eliminates light leakage at the screen's edge, providing a reliable and high-quality stereoscopic image display.
Implementation Method 1
a first adhesive layer and a reflective polarizer sequentially formed on a first surface of the negative dispersion retardation layer
Implementation Method 2
negative dispersion retardation layer
Implementation Method 3
negative dispersion retardation layer
Implementation Method 4
reflective polarizer
Implementation Method 5
reflective polarizer
Implementation Method 6
pancake lens including a half mirror and a lens base
Data Source
AI summary
An optical laminate for stereoscopic image display apparatuses and a stereoscopic image display apparatus including the same are disclosed. The optical laminate includes: a negative dispersion retardation layer; and a first adhesive layer and a reflective polarizer sequentially formed on one surface of the negative dispersion retardation layer. The first adhesive layer has a storage modulus of 1×106 Pa or more at 25° C.