Quantum Dot Partition Wall for Clearer Display Color Emission
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Solution Overview
Problem
Existing display apparatuses face challenges in achieving clear color emission and improving light extraction efficiency.
Innovation Solution
Incorporating a first and second color conversion layer with quantum dots and a partition wall containing scattering particles and pigment, along with optional lower and upper scattering particle layers, to enhance light extraction and visibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a partition wall is disposed between color conversion layers to prevent color mixing, then color clarity is improved, but light extraction efficiency deteriorates due to light scattering and absorption
Solution Approach 1:
The partition wall is constructed as a composite material containing both scattering particles (for color isolation) and fluorescent particles (for light wavelength conversion). This composite structure allows the partition wall to simultaneously prevent color mixing between adjacent pixels and convert scattered blue light into useful red light, thereby maintaining color clarity while improving light extraction efficiency.
Solution Approach 2:
The invention converts the harmful effect of light scattering (which causes color mixing) into a beneficial effect by introducing fluorescent particles that convert the scattered blue light into red light. The scattering that would normally degrade image quality is transformed into a mechanism for generating additional red light, improving overall light extraction efficiency while maintaining color purity.
2Measurement precision
If quantum dots are used in color conversion layers to achieve pure color emission, then color purity is improved, but manufacturing complexity increases
Solution Approach 1:
The invention merges the color conversion function and the light scattering/management function into a single integrated partition wall structure. By combining scattering particles and fluorescent particles in one layer, the design eliminates the need for separate color conversion layers and partition walls, thereby maintaining color purity while reducing manufacturing complexity.
Solution Approach 2:
The partition wall serves multiple functions simultaneously: it acts as a barrier to prevent color mixing between pixels, scatters light to improve extraction efficiency, and converts blue light to red light through fluorescent particles. This multi-functional design reduces the number of separate components needed, simplifying the overall device structure and manufacturing process.
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 improves color clarity and light efficiency by optimizing the display apparatus's light emission and scattering properties.
Implementation Method 1
a partition wall disposed between the first color conversion layer and the second color conversion layer and including partition wall-scattering particles
Implementation Method 2
a first color conversion layer disposed on a substrate and corresponding to an emission area of the first pixel and including first quantum dots; a second color conversion layer corresponding to an emission area of the second pixel and including second quantum dots
Implementation Method 3
a partition wall disposed between the first color conversion layer and the second color conversion layer and including partition wall-scattering particles and a first pigment
Data Source
AI summary
A display apparatus including a first pixel, a second pixel, and a third pixel includes: a first color conversion layer disposed on a substrate to correspond to an emission area of the first pixel and including first quantum dots; a second color conversion layer corresponding to an emission area of the second pixel and including second quantum dots; and a partition wall disposed between the first color conversion layer and the second color conversion layer and including partition wall-scattering particles and a first pigment.