Quantum Dot Glue for Polarizer Manufacturing
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Solution Overview
Problem
Current LCD manufacturing processes for quantum dot polarizers are complex and costly due to the need for alkali treatment and high-quality protective layers, which complicates the production and increases costs.
Innovation Solution
A manufacturing method for a quantum dot glue involving the mixing of water-soluble red and green quantum dot materials with polyvinyl alcohol and an alkaline solution to create a pH-adjusted quantum dot glue, which simplifies the production process by eliminating the need for alkali treatment and enhancing bonding strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If traditional polyvinyl alcohol glue is used to bond protective layers with polarizing film, then bonding is achieved, but alkali treatment is required which complicates the production process and increases costs
Solution Approach 1:
The patent combines the bonding function and alkali treatment function into a single material - the quantum dot glue layer. This layer simultaneously bonds the protective layer to the polarizing film and provides the necessary alkaline environment to prevent hydrolysis, eliminating the need for separate alkali treatment steps and simplifying the manufacturing process.
Solution Approach 2:
The quantum dot glue layer serves multiple functions: (1) bonding the protective layer to the polarizing film, (2) providing alkaline protection against hydrolysis, and (3) enhancing color gamut through quantum dot materials. This multi-functionality reduces the number of required components and process steps.
2Reliability
If quantum dot materials are encapsulated in PET film or glass tube, then protection is provided, but cost and material reliability issues arise
Solution Approach 1:
The patent uses a thin TAC protective layer instead of thick PET film or glass tube encapsulation. The TAC layer provides sufficient protection for the quantum dot materials while being more cost-effective and easier to manufacture, eliminating the need for complex encapsulation structures.
3Ease of manufacture
If polyvinyl alcohol is used without alkali treatment, then production is simpler, but the polarizing film is vulnerable to hydrolysis
Solution Approach 1:
The quantum dot glue layer is self-alkaline, containing sufficient alkaline substances to create and maintain an alkaline environment without requiring external alkali treatment. This self-service capability protects the polarizing film from hydrolysis while keeping the manufacturing process simple.
4Strength
If alkali treatment is performed on protective layers, then bonding strength with PVA glue is enhanced, but production time and cost increase
Solution Approach 1:
The patent merges the bonding layer and alkali treatment into a single quantum dot glue layer that is applied directly to the polarizing film. This eliminates the sequential steps of alkali treatment followed by separate bonding, reducing production time while maintaining bonding strength through the quantum dot materials' adhesive properties.
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 method simplifies the production of quantum dot polarizers, reduces costs, and improves color gamut and display quality by directly coating the quantum dot glue layer, which is alkaline and contains quantum dot materials.
Implementation Method 1
adding an alkaline solution to the quantum dot mixture to adjust a pH value thereof to be above 7
Implementation Method 2
A quantum dot material has the advantages of highly concentrated emission spectrum and high color purity
Implementation Method 3
easy to occur intermolecular hydrogen bonding with the PVA glue to reduce the contact angle and enhance the bonding strength
Data Source
AI summary
The invention provides a manufacturing method of a quantum dot glue, a quantum dot glue and a quantum dot polarizer. In the manufacturing method, a polyvinyl alcohol glue is added with water-soluble quantum dot materials, and an alkaline solution is used to adjust its pH value to be above 7, so that a quantum dot glue is obtained, the manufacturing process is simple and the obtained quantum dot glue can be used for fabricating a quantum dot polarizer. The quantum dot polarizer is provided with a quantum dot glue layer formed by coating the quantum dot glue, since the quantum dot glue itself is alkaline, an alkali treatment process applied to a bonded layer is eliminated and thus can be directly coated, so that the manufacturing process is simplified. Moreover, since it is added with quantum dot materials, color gamut and display quality of display device can be improved.