Quantum Dot Color Control Layer With Non-Hollow Particle Barrier
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Solution Overview
Problem
Existing display devices using low refractive layers with hollow inorganic particles are prone to moisture and gas permeation, degrading their reliability.
Innovation Solution
A color control member with a low refractive layer composed of non-hollow inorganic particles dispersed in a base resin, where the inner portions are filled, and a void part formed by a porogen, with specific weight percentages and refractive indices, is introduced between a light control layer and a color filter layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If hollow inorganic particles are used in the low refractive layer, then light efficiency is improved, but moisture and gas permeation occurs degrading reliability
Solution Approach 1:
The patent changes the fundamental parameter of particle structure from hollow to non-hollow (filled) inorganic particles. This structural parameter change eliminates the internal cavity that would otherwise allow moisture and gas permeation, while still maintaining the low refractive index property needed for light efficiency through the use of materials like SiO2, MgF2, or Al2O3 with appropriate refractive indices.
Solution Approach 2:
The patent employs composite materials by combining non-hollow inorganic particles with organic resin matrices. The inorganic particles provide the low refractive index for optical performance, while the organic resin matrix provides structural integrity and barrier properties against moisture and gas permeation, creating a composite system that achieves both light efficiency and reliability.
2Reliability
If non-hollow inorganic particles are used instead of hollow particles, then reliability is improved by preventing moisture and gas permeation, but manufacturing complexity increases
Solution Approach 1:
The patent changes the particle structure parameter from hollow to non-hollow, which simplifies the manufacturing process by eliminating the need for complex hollow particle formation techniques. Filled inorganic particles can be produced through standard precipitation or coating methods, reducing manufacturing complexity while improving reliability.
Solution Approach 2:
The patent utilizes controlled porosity in the inorganic particles, where the particles have a porous structure that is filled with inert material or vacuum. This controlled porosity approach allows for simplified manufacturing compared to creating completely hollow particles, while still providing the necessary barrier properties against moisture and gas permeation for improved reliability.
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 enhances the reliability of display devices by preventing moisture and gas permeation, thereby improving the durability and reducing manufacturing costs.
Implementation Method 1
a low refractive layer disposed between the color filter layer and the light control layer
Implementation Method 2
the porogen may be thermally decomposed to form the void part
Data Source
AI summary
A color control member includes a light control layer including quantum dots, a color filter layer disposed on the light control layer, and a low refractive layer disposed between the color filter layer and the light control layer. The low refractive layer includes a base resin, a plurality of non-hollow inorganic particles dispersed in the base resin and of which inner portions are filled. A weight percent of the base resin is in a range of about 40 wt % to about 45 wt % with respect to a total weight of the low refractive layer, and a weight percent of the non-hollow inorganic particles is in a range of about 40 wt % to about 45 wt % with respect to the total weight of the low refractive layer. The color control member including the low refractive layer has excellent reliability.