OLED Anti-Reflecting Layer Refractive Index Gradient
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Solution Overview
Problem
Existing OLED display technologies face challenges in reducing the reflective index without affecting the device's properties, often leading to increased thickness and production complexity, and difficulty in practical application.
Innovation Solution
A display panel design featuring an anti-reflecting layer with a refractive index between that of the second electrode layer and the optical film layer, reducing the refractive index difference and minimizing total reflection, while maintaining other properties intact, using a thin layer of metal or alloy materials like calcium, lithium, or gold alloys.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If an anti-reflecting layer is added to reduce the reflective index, then the display effect is improved, but the device structure becomes more complex
Solution Approach 1:
An anti-reflecting layer is introduced as an intermediary component between the second electrode layer and the optical film layer. This layer has a refractive index (0.5-1) that is greater than the second electrode layer and smaller than the optical film layer, serving as a gradient transition to reduce total reflection and improve light extraction efficiency without requiring fundamental structural changes
2Object-affected harmful factors
If conventional methods are used to reduce reflective index, then the reflection is reduced, but the device thickness increases and production complexity increases
Solution Approach 1:
The refractive index parameter of the anti-reflecting layer is specifically optimized to range from 0.5 to 1, which is greater than the second electrode layer and smaller than the optical film layer. This parameter selection creates an optimal gradient that reduces total reflection while maintaining a thin layer configuration, avoiding the thickness increase associated with conventional multi-layer approaches
3Object-affected harmful factors
If conventional methods are used to reduce reflective index, then the reflection is reduced, but the production process becomes more complex
Solution Approach 1:
The anti-reflecting layer serves as a simple intermediary component that can be integrated into the existing OLED structure. By positioning this layer between the second electrode layer and the optical film layer, the patent achieves reflection reduction through a straightforward structural addition rather than complex multi-layer stacking or process modifications
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 the reflective index of the display panel, improving the display effect without affecting other properties, and simplifying the production process, with the anti-reflecting layer's refractive index ranging from 0.5 to 1 and thickness between 5-10 nm, enhancing light extraction efficiency and color purity.
Implementation Method 1
the refractive index of the anti-reflecting layer is greater than that of the second electrode layer and is smaller than that of the optical film layer
Data Source
AI summary
Disclosed are a display panel and a display device. The display panel includes a substrate, a first electrode layer located on the substrate, a light emitting layer located on the first electrode layer, a second electrode layer located on the light emitting layer, an optical film layer located on the second electrode layer and configured to improve color offset and extracting light and an anti-reflecting layer located between the second electrode layer and the optical film layer; and the refractive index of the anti-reflecting layer is greater than that of the second electrode layer and is smaller than that of the optical film layer.