Quantum Dot Display Partition Wall With Concave Light Extraction
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Solution Overview
Problem
Current display apparatuses face challenges in achieving improved color implementation and light extraction efficiency, particularly in effectively converting incident light into desired color light and managing light emission from pixels.
Innovation Solution
The display apparatus incorporates a color filter unit with quantum dots for light conversion and a partition wall structure that includes openings and concave portions to optimize light emission, along with a light blocking layer to enhance color reproducibility and reduce external light reflection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a conventional flat partition wall structure is used, then the device complexity is low, but the light extraction efficiency and color implementation are insufficient
Solution Approach 1:
The partition wall is designed with a concave portion that curves inward toward the light-emitting device, creating a non-planar surface. This curvature modifies the path of emitted light, improving extraction efficiency by directing light toward the viewer while maintaining a relatively simple single-layer structure without complex multi-component assemblies
2Manufacturing precision
If quantum dots are added for color conversion, then color reproducibility is improved, but the device complexity increases
Solution Approach 1:
Quantum dots with specific size parameters are incorporated into the color conversion layer to convert incident blue light into precise red, green, or other wavelengths. By controlling the size and composition parameters of the quantum dots, accurate color reproduction is achieved while using a single conversion layer rather than multiple filter layers
3Productivity
If the concave portion is positioned closer to the light-emitting device, then light extraction efficiency is improved, but color implementation quality deteriorates
Solution Approach 1:
The concave portion is positioned in the vertical dimension at an optimized depth rather than being placed horizontally closer to the light-emitting device. This vertical positioning allows light to be extracted efficiently while still passing through the color conversion layer and quantum dots, maintaining color quality by ensuring light interacts with the color conversion materials before exiting
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 color reproducibility and light extraction efficiency by effectively converting incident light into specific color lights and managing light emission, resulting in enhanced display quality.
Implementation Method 1
first quantum dots configured to convert incident light into first color light
Implementation Method 2
a first concave portion spaced apart from the first opening in a plan view
Implementation Method 3
a light blocking layer to enhance color reproducibility and reduce external light reflection
Data Source
AI summary
A display apparatus includes: a first pixel, a second pixel, and a third pixel respectively configured to emit different colors; a first partition wall on a first light-emitting device of the first pixel; and a first color conversion layer corresponding to an emission area of the first pixel. The first partition wall has a first opening corresponding to the first light-emitting device and a first concave portion spaced apart from the first opening in a plan view. The first color conversion layer includes first quantum dots configured to convert incident light into first color light.