Quantum-Dot Display Subpixels With Scattering Layers for Higher Luminance
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Solution Overview
Problem
Existing display devices face challenges in achieving high light output efficiency, sufficient luminance, improved process efficiency, reduced production costs, and excellent optical characteristics.
Innovation Solution
A display device is designed with sub-pixels that include a display layer with a light emitting element, a light controlling layer, and a color conversion layer in one sub-pixel area, and scattering layers with scatterers in the other sub-pixel areas, along with a color filter layer to enhance light efficiency and luminance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a color conversion layer with quantum-dots is formed in all sub-pixel areas, then color accuracy is improved, but light output efficiency decreases and production cost increases
Solution Approach 1:
The patent applies different structures to different sub-pixel areas: the first sub-pixel area contains a color conversion layer with quantum-dots for accurate color reproduction, while the second and third sub-pixel areas use scattering layers without quantum-dots. This local differentiation maintains color accuracy where needed while preserving light output efficiency in other areas, thereby resolving the contradiction between color accuracy and light output efficiency.
2Measurement precision
If a color conversion layer with quantum-dots is formed in all sub-pixel areas, then color accuracy is improved, but production cost increases
Solution Approach 1:
The invention forms the color conversion layer with quantum-dots only in the first sub-pixel area rather than uniformly across all sub-pixel areas. This localized approach reduces the total amount of quantum-dot material required and simplifies the fabrication process, thereby reducing production costs while maintaining sufficient color accuracy through the selective application of color conversion technology.
3Productivity
If scattering layers are added to sub-pixel areas, then light output efficiency is improved, but device structure becomes more complex
Solution Approach 1:
The patent combines the scattering layer and the color conversion layer into a single integrated layer structure in the first sub-pixel area, rather than treating them as separate components. This merging reduces the overall device structure complexity while maintaining the light output efficiency benefits of the scattering layer and the color accuracy benefits of the quantum-dots.
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 display device achieves improved light output efficiency, sufficient luminance, and reduced production costs while maintaining excellent optical characteristics, simplifying the fabrication process.
Implementation Method 1
a color conversion layer in the first sub-pixel area and including a quantum-dot
Implementation Method 2
a first scattering layer in the second sub-pixel area and including a first scatterer, and a second scattering layer in the third sub-pixel area and including a second scatterer
Data Source
AI summary
Provided is a display device, including sub-pixels formed on a base layer, and including a color conversion layer in a first sub-pixel area and including a quantum-dot, a first scattering layer in a second sub-pixel area and including a first scatterer, and a second scattering layer in the third sub-pixel area and including a second scatterer, a first color filter in the first sub-pixel area, a second color filter in the second sub-pixel area, and a third color filter in the third sub-pixel area, wherein emitted light from a light emitting element includes light of the second color and light of the third color, and wherein colors of light passing through the first scattering layer and the second scattering layer are substantially unchanged by the first scattering layer and the second scattering layer.