OLED Display Structure with Quantum Conversion for Clear Color Emission
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Solution Overview
Problem
Existing display apparatuses face challenges in achieving improved light extraction efficiency and clear color emission from pixels, with a need for enhanced reliability in manufacturing processes.
Innovation Solution
A display apparatus design incorporating a first pixel, a second pixel, and a third pixel with organic light-emitting diodes, featuring a black matrix and column spacer on the same layer, a quantum conversion layer with quantum dots, and a thin-film encapsulation layer, along with color filters to enhance light extraction and color clarity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional display structure is used, then the manufacturing process is simpler, but the light extraction efficiency is insufficient and color emission is not clear
Solution Approach 1:
The black matrix and column spacer are formed on the same layer, integrating two functional components into a single structural plane. This merging approach maintains manufacturing simplicity while achieving both light blocking and spacing functions simultaneously, resolving the contradiction between improved light extraction efficiency and structural complexity
Solution Approach 2:
The integrated layer containing both the black matrix and column spacer serves multiple functions: it provides optical isolation through the black matrix while simultaneously maintaining structural spacing through the column spacer. This multi-functionality allows the display apparatus to achieve improved light extraction efficiency and color emission clarity without proportionally increasing manufacturing complexity
2Reliability
If quantum conversion layers with different quantum dot sizes are used for different pixels, then color emission clarity is improved, but the manufacturing precision requirements increase
Solution Approach 1:
Different quantum dot sizes are selectively applied to different pixel regions (first pixel with larger quantum dots, second pixel with smaller quantum dots) to optimize color emission for each specific pixel type. This local quality approach allows color emission clarity to be improved through size differentiation while concentrating manufacturing precision requirements on the patterning process rather than requiring all quantum dots to meet identical specifications
Solution Approach 2:
The quantum dot size parameter is deliberately varied across different pixel types to achieve optimal color emission characteristics. By changing this physical parameter (size) according to the specific pixel requirements, the patent achieves clear color emission while the manufacturing process manages precision through controlled parameter variation rather than uniform high-precision requirements
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 design improves light extraction efficiency and ensures clear emission of colors, enhancing the overall reliability and manufacturing process of the display apparatus.
Implementation Method 1
an organic light-emitting diode on a substrate and including a pixel electrode, an intermediate layer, and an opposite electrode
Implementation Method 2
a first quantum conversion layer on the substrate to correspond to an emission area of the first pixel and including first quantum dots
Data Source
AI summary
A display apparatus, includes: a first pixel, a second pixel, and a third pixel each configured to emit different colors; an organic light-emitting diode on a substrate and including a pixel electrode, an intermediate layer, and an opposite electrode; a black matrix on the organic light-emitting diode; a column spacer on the same layer as the black matrix and spaced apart from the black matrix by a first distance in a plan view; and a first quantum conversion layer on the substrate to correspond to an emission area of the first pixel and including first quantum dots.