Quantum Dot Display Bank With Scattering Agent
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Solution Overview
Problem
Existing display apparatuses face challenges in preventing color mixing between pixels while maintaining light efficiency, as current methods either reduce color mixing at the cost of light efficiency or increase efficiency but lead to color mixing due to the nature of the bank composition used.
Innovation Solution
A display apparatus is designed with a bank composition that includes a black pigment and a scattering agent, where the amount of black pigment is optimized between 0.25 wt% to 1.0 wt% and the scattering agent is 10 wt% or more, dispersed in a fluorine-containing polymer, to prevent color mixing and enhance light efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a bank with high black pigment content is used to prevent color mixing, then color purity is improved, but light efficiency deteriorates
Solution Approach 1:
The patent optimizes the concentration parameter of black pigment within a specific range (0.25-1.0 wt%) to achieve the best balance between color purity and light efficiency. This parameter optimization prevents color mixing while minimizing light loss.
Solution Approach 2:
The patent creates a composite bank structure combining black pigment with scattering particles and fluorine-containing polymer. This composite material achieves both color separation function and light reflection efficiency, resolving the contradiction between preventing color mixing and maintaining light output.
2Loss of energy
If a bank with high scattering agent content is used to increase light efficiency, then light output is improved, but color mixing increases
Solution Approach 1:
The patent formulates a composite bank material containing scattering particles (10-50 wt%), black pigment (0.25-1.0 wt%), and fluorine-containing polymer. The synergistic combination allows the scattering particles to reflect light efficiently while the black pigment prevents color mixing, achieving both goals simultaneously.
Solution Approach 2:
The patent applies different functional components within the same bank at different local concentrations - scattering particles are distributed throughout to reflect light, while black pigment is concentrated to prevent color mixing. This local differentiation allows simultaneous optimization of light efficiency and color purity.
3Manufacturing precision
If the bank composition is optimized for color purity, then color mixing is reduced, but light output decreases
Solution Approach 1:
The patent develops a composite bank formulation where scattering particles (10-50 wt%) provide light reflection to maintain output, black pigment (0.25-1.0 wt%) ensures color purity, and fluorine-containing polymer (5-30 wt%) provides structural stability. This composite approach achieves both color purity and light output.
Solution Approach 2:
The patent optimizes multiple parameters simultaneously - black pigment concentration (0.25-1.0 wt%), scattering particle content (10-50 wt%), and polymer matrix composition - to achieve the optimal balance point where both color purity and light output are maximized.
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 effectively reduces color mixing between pixels while increasing light efficiency by adjusting the proportions of black pigment and scattering agent, resulting in improved color purity and light output.
Implementation Method 1
each of the plurality of banks includes a black pigment
Implementation Method 2
each of the plurality of banks includes a black pigment and a scattering agent
Data Source
AI summary
A display apparatus includes: a first substrate on which a plurality of light-emitting devices are arranged; a plurality of light controllers arranged above the first substrate and corresponding to the plurality of light-emitting devices; and a plurality of banks between the plurality of light controllers, wherein each bank of the plurality of banks includes a black pigment and a scattering agent. Because the display apparatus according to an embodiment includes a bank including a black pigment and a scattering agent, color mixing between pixels is prevented or reduced, and light efficiency is increased.