Quantum Dot Display Panel Barrier Coating for Light Efficiency
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Solution Overview
Problem
Current display technologies using quantum dots face challenges in achieving efficient light emission and preventing cross-contamination of ink droplets in bank apertures, which affects the uniformity and quality of quantum dots material layers.
Innovation Solution
A display panel design featuring a bank layer with wavy surfaces and a barrier coating layer made of graphene, which is in direct contact with the quantum dots material layer, enhances light emission efficiency and prevents cross-contamination by binding through hydrogen bonds, allowing for even distribution and reduced thickness of quantum dots blocks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a barrier coating layer is introduced to prevent cross-contamination of ink droplets, then the uniformity and quality of quantum dots material layer is improved, but the device complexity increases
Solution Approach 1:
A barrier coating layer made of graphene material is introduced between the bank layer and the quantum dots material layer. This intermediary layer prevents cross-contamination of ink droplets while maintaining the uniformity and quality of the quantum dots material layer, resolving the contradiction by adding a functional intermediate component rather than complicating existing structures.
Solution Approach 2:
The barrier coating layer is implemented as a thin film structure that provides effective contamination prevention without significantly increasing device thickness or structural complexity. The thin film approach allows the barrier function to be integrated into the existing layered structure with minimal impact on overall device complexity.
2Use of energy by moving object
If the quantum dots material layer thickness is reduced to improve light emission efficiency, then the luminous efficiency is improved, but the manufacturing precision becomes more difficult to control
Solution Approach 1:
The barrier coating layer is designed with specific thickness parameters (5 nm to 50 nm) that optimize both light emission efficiency and manufacturing controllability. By carefully controlling the thickness parameter of the barrier layer, the system achieves improved luminous efficiency while maintaining precise manufacturing control through established deposition techniques.
Solution Approach 2:
The barrier coating layer serves as an intermediary that enables precise thickness control of the quantum dots material layer. The barrier layer provides a well-defined interface that facilitates controlled deposition of subsequent layers, allowing for precise thickness management even at reduced thicknesses to maximize light emission efficiency.
3Use of energy by moving object
If a wavy surface structure is created on the bank layer to enhance light emission, then the light emission efficiency is improved, but the manufacturing precision requirements increase
Solution Approach 1:
A wavy surface structure with alternating convex and concave portions is created on the bank layer to enhance light emission efficiency. The curved surface morphology increases light extraction by reducing total internal reflection, and this can be achieved through controlled deposition or etching processes that create periodic surface patterns with well-defined wavelengths and amplitudes.
Solution Approach 2:
The wavy surface structure is characterized by specific geometric parameters (wavelength, amplitude, duty cycle) that can be optimized for light emission. By controlling these parameters within specific ranges, the system achieves enhanced light extraction efficiency while maintaining manufacturability through established patterning and deposition techniques.
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 design significantly enhances light emission efficiency and achieves a high degree of evenness in the quantum dots material layer, preventing cross-contamination and allowing for the formation of more planar light emitting blocks, thereby improving display panel performance.
Implementation Method 1
barrier coating layer made of graphene, which is in direct contact with the quantum dots material layer, enhances light emission efficiency and prevents cross-contamination by binding through hydrogen bonds
Implementation Method 2
Quantum dots have unique photoluminescence and electroluminescence properties due to quantum size effects and dielectric confinement effects
Implementation Method 3
Quantum dots have unique photoluminescence and electroluminescence properties due to quantum size effects and dielectric confinement effects
Implementation Method 4
Quantum dots have unique photoluminescence and electroluminescence properties
Implementation Method 5
Quantum dots have unique photoluminescence and electroluminescence properties
Data Source
AI summary
A display panel is provided. The display panel includes a base substrate; a bank layer on the base substrate, the bank layer defining a plurality of bank apertures; a quantum dots material layer on the base substrate, the quantum dots material layer comprising a plurality of quantum dots blocks respectively in at least some of the plurality of bank apertures; a barrier coating layer in a respective one of the plurality of bank apertures; and an encapsulating layer on a side of the barrier coating layer closer to the base substrate. At least a portion of the barrier coating layer is in direct contact with a portion of the encapsulating layer.