Quantum Dot Display Pixel Segmentation for Luminance and Color Purity
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Solution Overview
Problem
Current display apparatuses using quantum dot layers and color filters face challenges in optimizing light transmission and color conversion efficiency, leading to reduced luminance and color matching rates.
Innovation Solution
A display apparatus is designed with a main pixel and a sub-pixel, each featuring a quantum dot layer formed using inkjet compositions with different volatile components, where the main pixel concentrates scatterers and quantum dots for enhanced color conversion, and the sub-pixel optimizes light transmission by minimizing the concentration of scatterers and quantum dots, thereby improving light efficiency and color purity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If quantum dot layer is designed with high concentration of scatterers and quantum dots for color conversion, then color conversion efficiency is improved, but light transmission is reduced
Solution Approach 1:
The pixel is divided into two functional regions: a main pixel region with high concentration of scatterers and quantum dots for color conversion, and a sub-pixel region with low concentration for light transmission. This spatial segmentation allows each region to optimize for its specific function, resolving the contradiction between color conversion efficiency and light transmission.
Solution Approach 2:
Different regions of the pixel are assigned different concentrations of scatterers and quantum dots. The main pixel region has high concentration for effective color conversion, while the sub-pixel region has low concentration for optimal light transmission. This local differentiation of material concentration allows simultaneous optimization of both color conversion and light transmission properties.
2Illumination intensity
If quantum dot layer is designed with low concentration of scatterers and quantum dots for light transmission, then light transmission is improved, but color conversion efficiency is reduced
Solution Approach 1:
The pixel is divided into two functional regions: a main pixel region with high concentration of scatterers and quantum dots for color conversion, and a sub-pixel region with low concentration for light transmission. This spatial segmentation allows each region to optimize for its specific function, resolving the contradiction between color conversion efficiency and light transmission.
Solution Approach 2:
Different regions of the pixel are assigned different concentrations of scatterers and quantum dots. The main pixel region has high concentration for effective color conversion, while the sub-pixel region has low concentration for optimal light transmission. This local differentiation of material concentration allows simultaneous optimization of both color conversion and light transmission properties.
3Ease of manufacture
If single-colored light passes through quantum dot layer and color filter, then color selection is achieved, but luminance is reduced
Solution Approach 1:
The pixel is divided into two functional regions: a main pixel region with high concentration of scatterers and quantum dots for color conversion, and a sub-pixel region with low concentration for light transmission. This spatial segmentation allows each region to optimize for its specific function, resolving the contradiction between color conversion efficiency and light transmission.
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 enhances luminance and color purity by optimizing the concentration of scatterers and quantum dots in the main pixel for color conversion and optimizing light transmission in the sub-pixel, resulting in improved display performance.
Implementation Method 1
after a first inkjet composition, including a first liquid component and a first solid component, is sprayed, the first liquid component is evaporated such that the first solid component is concentrated
Implementation Method 2
a quantum dot layer and/or a color filter as a light control layer to convert the single-colored light into a desired color selected from among red, green, and blue
Implementation Method 3
Inner sides of the banks defining the main pixel and/or the sub-pixel may be coated with scatterers and quantum dots
Data Source
AI summary
A display apparatus is provided to include: a first substrate on which a light-emitting device emitting light is located; and a main pixel including a first quantum dot layer; a sub-pixel including a second quantum dot layer, the main pixel and the sub-pixel corresponding to the light-emitting device and being located above the first substrate, wherein the main pixel and the sub-pixel are defined by banks, the main pixel changes a color of the light emitted by the light-emitting device, and the sub-pixel transmits the light emitted by the light-emitting device.