Quantum Dot Light Control Member for Display Devices
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Solution Overview
Problem
Existing display devices face challenges in improving light efficiency of quantum dots in light control layers, which affects color purity and reduces efficiency.
Innovation Solution
A method involving irradiation of specific wavelengths of light to quantum dots on a base substrate with barrier walls, followed by heat-treatment, to enhance the light efficiency and distribution density of quantum dots in the light control member.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If quantum dots are used in light control layer, then color purity is improved, but light efficiency is insufficient
Solution Approach 1:
The patent applies parameter changes by controlling the wavelength of irradiated light (430-500 nm range) and temperature conditions (25-80°C for first light irradiation, higher temperature for heat treatment) to optimize quantum dot performance. These parameter adjustments improve both color purity and light efficiency simultaneously
Solution Approach 2:
The patent employs preliminary action through pre-irradiation with first light (430-500 nm) before final heat treatment. This preliminary light irradiation prepares the quantum dots in a specific state that enhances subsequent heat treatment effectiveness, thereby improving light efficiency while maintaining color purity
2Quantity of substance
If light control resin is applied, then quantum dot distribution is achieved, but distribution density is insufficient
Solution Approach 1:
The patent uses light control resin as an intermediary medium to distribute quantum dots uniformly. The resin facilitates proper quantum dot placement and maintains optimal distribution density through controlled irradiation and heat treatment processes
Solution Approach 2:
The patent applies periodic action through sequential multi-stage processing: first light irradiation (430-500 nm), optional preliminary heat treatment, second light irradiation (shorter wavelength), and final heat treatment. This periodic processing sequence progressively enhances quantum dot distribution density
3Use of energy by moving object
If multiple light irradiation and heat treatment steps are applied, then light efficiency is improved, but manufacturing complexity increases
Solution Approach 1:
The patent merges multiple processing steps into an integrated manufacturing flow where light irradiation and heat treatment operations are combined in a specific sequence. This merging approach achieves improved light efficiency while controlling overall process complexity through systematic integration
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 improves light efficiency and reduces the overshoot phenomenon in display devices, leading to enhanced color accuracy and performance.
Implementation Method 1
irradiating a first light having a center wavelength equal to or greater than about 430 nm and equal to or smaller than about 500 nm to the light control resin
Implementation Method 2
The irradiating of the second light includes curing the light control resin after the irradiating of the first light
Implementation Method 3
heat-treating the light control resin to which the second light is irradiated
Data Source
AI summary
A method of providing a light control member includes providing a plurality of barrier walls spaced apart from each other and defining a concave portion therebetween, providing a light control resin including a quantum dot in the concave portion, providing a first light having a wavelength equal to or greater than about 430 nanometers and equal to or smaller than about 500 nanometers to the light control resin, providing a second light having a wavelength shorter than the wavelength of the first light to the light control resin to which the first light is irradiated, and providing heat-treating the light control resin to which the second light is irradiated.