RGB Insulating Layer Configuration for OLED Resonance Alignment
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Solution Overview
Problem
Existing organic light-emitting display apparatuses face challenges in achieving optimal resonance distances for red, green, and blue emission layers without complex mask processes, leading to inefficiencies in light emission and manufacturing complexity.
Innovation Solution
The apparatus includes separate reflective layers for red, green, and blue emissions, with specific insulating layers positioned to align with resonance distances of each emission layer, allowing for direct deposition of pixel electrodes and simplifying the manufacturing process by eliminating the need for additional masks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If complex mask processes are used to achieve optimal resonance distances for red, green, and blue emission layers, then manufacturing precision is improved, but device complexity increases
Solution Approach 1:
The patent divides the insulating layer into three separate insulating layers, each corresponding to a specific emission layer (red, green, blue). Each insulating layer has a specific thickness that directly determines the resonance distance for its corresponding emission layer. This segmentation eliminates the need for complex mask processes by allowing independent control of resonance distances through layer thickness design during manufacturing.
Solution Approach 2:
The patent performs preliminary action by pre-determining the thickness of each insulating layer during the manufacturing process to achieve the desired resonance distance. By calculating and setting the appropriate thickness values in advance (first insulating layer: 100-300nm, second insulating layer: 50-200nm, third insulating layer: 50-150nm), the optimal resonance conditions are established before the emission layers are formed, eliminating the need for subsequent mask processes.
2Manufacturing precision
If additional masks are used to align resonance distances, then manufacturing precision is improved, but productivity decreases
Solution Approach 1:
By segmenting the insulating structure into three distinct insulating layers with predetermined thicknesses, the patent enables direct formation of pixel electrodes without requiring additional mask processes. This segmentation approach maintains manufacturing precision while significantly improving productivity by reducing the number of manufacturing steps.
Solution Approach 2:
The patent extracts and eliminates the complex mask processes from the manufacturing sequence by incorporating the resonance distance control function directly into the insulating layer thickness design. This extraction of the masking step simplifies the overall manufacturing process and improves productivity.
3Use of energy by moving object
If insulating layers are positioned to align with resonance distances, then light emission efficiency is improved, but device complexity increases
Solution Approach 1:
The patent applies local quality by assigning different thicknesses to different insulating layers based on the specific resonance requirements of each emission layer. The first insulating layer (100-300nm), second insulating layer (50-200nm), and third insulating layer (50-150nm) are locally optimized to achieve optimal light emission efficiency for red, green, and blue emissions respectively, while maintaining a relatively simple overall structure.
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
This configuration enhances light emission efficiency and simplifies the manufacturing process by aligning resonance distances without additional masks, improving the overall performance and production efficiency of the organic light-emitting display apparatus.
Implementation Method 1
a first reflective layer, a second reflective layer, and a third reflective layer that are separately disposed on the substrate
Implementation Method 2
a first insulating layer on the first reflective layer, but not on the second reflective layer and the third reflective layer; a second insulating layer on the first insulating layer and the second reflective layer, but not on the third reflective layer
Data Source
AI summary
An organic light-emitting display apparatus, including a substrate; a first reflective layer, a second reflective layer, and a third reflective layer that are separately disposed on the substrate; a first insulating layer on the first reflective layer, but not on the second reflective layer and the third reflective layer; a second insulating layer on the first insulating layer and the second reflective layer, but not on the third reflective layer; and a first pixel electrode for red emission on the second insulating layer and corresponding to the first reflective layer, a second pixel electrode for green emission on the second insulating layer and corresponding to the second reflective layer, and a third pixel electrode for blue emission on the third reflective layer.