Functional Laminated Film Bubble Prevention
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Solution Overview
Problem
In liquid crystal display devices, quantum dot layers sandwiched between gas barrier films can experience bubble formation due to evaporating monomers or decomposed products from the binder, leading to defects and deterioration of the quantum dot layer, which existing solutions fail to adequately address.
Innovation Solution
A functional laminated film is created by dispersing quantum dots in a binder formed from monomers with a molecular weight of 100 to 1,500, where the gas barrier film has a water vapor permeability of 0.005 to 0.8 g/(m²·day), allowing for the discharge of evaporating binder materials and preventing bubble generation and material deterioration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a gas barrier film with high barrier performance is used to protect the quantum dot layer, then protection from water and oxygen is improved, but bubble generation occurs due to trapped evaporating monomers
Solution Approach 1:
The patent changes the water vapor permeability parameter of the gas barrier film from very low (high barrier) to a controlled range of 0.005-0.8 g/(m²·day). This parameter optimization allows the film to maintain sufficient protection against water and oxygen while permitting evaporating monomers to pass through, thereby preventing bubble formation in the quantum dot layer.
2Object-affected harmful factors
If the water vapor permeability of the gas barrier film is increased to allow evaporant discharge, then bubble generation is reduced, but protection performance from water and oxygen deteriorates
Solution Approach 1:
The patent identifies and optimizes the water vapor permeability parameter to a specific range (0.005-0.8 g/(m²·day)) that simultaneously satisfies two opposing requirements: allowing sufficient discharge of evaporating monomers to prevent bubbles while maintaining adequate barrier performance against water and oxygen penetration. This precise parameter control resolves the contradiction between bubble prevention and protection performance.
3Ease of manufacture
If monomers with lower molecular weight are used in the binder, then ease of manufacture and curing is improved, but bubble generation increases due to easier evaporation
Solution Approach 1:
The patent optimizes the molecular weight parameter of monomers used in the binder to fall within 100-1,500. This parameter selection balances the competing requirements: lower molecular weight monomers provide easier handling and curing, while the specific range limits excessive evaporation that would cause bubbles. The optimized molecular weight range enables effective manufacturing while minimizing bubble formation.
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 effectively inhibits bubble formation and protects the quantum dot layer from water and oxygen, improving the quality and longevity of the functional layer in liquid crystal display devices.
Implementation Method 1
gases from the evaporation of monomers which form a binder for the quantum dot layer, or decomposed products thereof
Implementation Method 2
the gas barrier film has a water vapor permeability of 0.005 to 0.8 g/(m²·day), allowing for the discharge of evaporating binder materials and preventing bubble generation
Implementation Method 3
quantum dots which emit by conversion of a wavelength of incidence ray
Implementation Method 4
the quantum dots are excited to emit fluorescent light
Implementation Method 5
a 'quantum size effect' in which the state densities (energy levels) of the electrons are discretized is expressed. Through the quantum size effect, the absorption wavelength—the emission wavelength of the light can be controlled by changing the sizes of the quantum dots
Implementation Method 6
the light emission intensity is reduced by a photo-oxidation reaction
Data Source
AI summary
Provided is a functional laminated film having a functional layer formed by dispersing functional materials in a binder, in which the functional laminated film can inhibit generation of bubbles in the functional layer, and can prevent the functional material from being deteriorated by water or oxygen. The functional layer is formed by dispersing functional materials in a binder, and the binder is formed by polymerizing monomers. The monomers include 50% by mass or more of monomers X having a molecular weight of 100 to 1,500 with respect to the total mass of the monomers, and the gas barrier performance of a gas barrier film is 0.005 [g/(m2·day)] to 0.8 [g/(m2·day)].