Organic Capping Layer for Quantum Dot Display Protection
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Solution Overview
Problem
Display apparatuses face defects due to oxygen or moisture permeation affecting the quantum dot layer, leading to reduced performance and reliability.
Innovation Solution
A display apparatus design incorporating an organic capping layer adjacent to the quantum dot or scattering layer, with both layers formed using the same type of acrylic monomers and cured simultaneously, along with an inorganic capping layer, to enhance protection and performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the quantum dot layer is directly exposed without adequate protection, then the manufacturing process is simpler, but oxygen or moisture permeation causes defects and reduces reliability
Solution Approach 1:
An organic capping layer is introduced to cover and protect the quantum dot layer. This thin film barrier prevents oxygen and moisture from permeating into the quantum dot layer, thereby eliminating defects caused by environmental exposure while maintaining a relatively simple overall structure.
Solution Approach 2:
The patent employs a composite protection system combining organic and inorganic capping layers. The organic capping layer provides flexible coverage over the quantum dot layer, while the inorganic capping layer offers additional barrier properties, creating a multi-material protective structure that enhances reliability without excessive complexity.
2Ease of manufacture
If different monomers are used for the organic capping layer and quantum dot layer, then material optimization is more flexible, but manufacturing complexity and process difficulty increase
Solution Approach 1:
The patent specifies using the same acrylic monomer for both the organic capping layer and the quantum dot layer. This homogeneous material approach simplifies the manufacturing process by reducing the number of different materials that need to be handled, stored, and processed, while still allowing adequate material optimization for both layers.
3Productivity
If the organic capping layer and quantum dot layer are cured separately, then process control is more precise, but manufacturing time and productivity are reduced
Solution Approach 1:
The patent combines the curing processes for the organic capping layer and quantum dot layer into a single simultaneous curing step. This merging of operations eliminates the need for separate curing cycles, thereby improving manufacturing efficiency and productivity while the curing process itself remains well-defined and controllable.
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 reduces defects in the quantum dot layer, improving the colorimetric purity and luminance of emitted light by preventing permeation and enhancing the overall reliability of the display apparatus.
Implementation Method 1
defects of a quantum dot layer due to permeation of oxygen or moisture is reduced
Implementation Method 2
A monomer used in forming the organic capping layer and a monomer used in forming the quantum dot layer and/or the scattering layer may be the same type of monomer
Data Source
AI summary
A display apparatus includes: a first substrate on which a light-emitting device is located; and a light controller on the first substrate and corresponding to the light-emitting device. The light controller includes: an organic capping layer; a quantum dot layer and/or a scattering layer; and a color filter layer. The organic capping layer is adjacent to the quantum dot layer and/or the scattering layer.