Quantum Dot Display Panel Encapsulation for Color Accuracy
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Solution Overview
Problem
Existing display panels face challenges in achieving high display quality due to limitations in light control patterns, which affect the color accuracy and brightness of the images produced.
Innovation Solution
The display panel incorporates a light control pattern disposed in a second opening of a partition wall, which includes a quantum dot for color conversion, and is encapsulated by a second encapsulation layer with inorganic and organic layers, along with a color filter to enhance optical characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a light control pattern is used to produce color images, then color reproduction is achieved, but display quality and color accuracy are limited
Solution Approach 1:
The patent uses quantum dots (semiconductor nanoparticles) as a composite material in the light control pattern to convert blue light into red and green light wavelengths. This quantum dot layer, combined with the organic emission layer and inorganic encapsulation layers, creates a multi-material system that achieves superior color accuracy and display quality compared to conventional single-material light control approaches.
2Reliability
If conventional encapsulation layers are used, then protection is provided, but delamination occurs reducing reliability
Solution Approach 1:
The encapsulation structure uses a composite of organic encapsulation layers and inorganic encapsulation layers (such as silicon oxide or silicon nitride). This multi-material encapsulation system provides both flexibility and structural integrity, preventing delamination while maintaining protection against environmental factors.
Solution Approach 2:
The patent implements a nested encapsulation structure where the inorganic encapsulation layer is positioned within the organic encapsulation layer, creating a nested configuration. The inorganic layer is disposed at a lower position than the organic layer, forming a protective core that is surrounded by the organic encapsulation material, thereby enhancing overall encapsulation integrity.
3Reliability
If multiple encapsulation layers are added to prevent delamination, then reliability improves, but device complexity increases
Solution Approach 1:
The patent implements a nested encapsulation structure where the inorganic encapsulation layer is positioned within the organic encapsulation layer, creating a compact nested configuration. This nested design provides enhanced protection against delamination while maintaining a space-efficient structure that minimizes overall device complexity.
Solution Approach 2:
The patent addresses encapsulation complexity by transitioning to a multi-dimensional layered approach. The inorganic encapsulation layer is disposed at a lower position (vertical dimension) than the organic encapsulation layer, creating a stratified structure that provides enhanced protection without significantly increasing horizontal footprint or overall device complexity.
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
This configuration improves the display quality by providing accurate color reproduction and enhanced brightness, while also reducing the risk of delamination and improving the overall reliability of the display panel.
Implementation Method 1
The light control pattern may include a quantum dot
Data Source
AI summary
A display panel including: a display region including pixels and a non-display region, each pixel including an emission element including a first electrode, an emission layer, and a second electrode; a pixel definition layer including a first opening; a first encapsulation layer on the pixel definition layer and overlapping the emission element; a partition wall on the first encapsulation layer and including a second opening and a dummy opening; a light control pattern in the second opening; a second encapsulation layer on the partition wall and overlapping the light control pattern; and a color filter on the second encapsulation layer and overlapping the light control pattern, the second encapsulation layer includes: a first encapsulation inorganic layer on the partition wall; an encapsulation organic layer on the first encapsulation inorganic layer and including an edge overlapping the dummy opening; and a second encapsulation inorganic layer on the encapsulation organic layer.