Curved OLED Underlayer for Chromatic Aberration Control
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Solution Overview
Problem
Curved OLED display panels experience chromatic aberration between the central and edge regions due to thickness and structural differences, affecting display quality.
Innovation Solution
A display panel design featuring a substrate with an underlayer that has a concave contour, where the thickness gradually increases from the center to the edge, and includes protruding structures on its surface, formed using a dual beam interference lithography process, to align with a curved substrate, reducing chromatic aberration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the underlayer has a uniform thickness across the panel, then the manufacturing process is simple, but chromatic aberration occurs between the central and edge regions
Solution Approach 1:
The underlayer is designed with non-uniform thickness, where the thickness varies from the central region to the edge region. This local variation in thickness compensates for the optical path differences caused by the curved substrate, ensuring that light from different regions experiences consistent optical conditions, thereby eliminating chromatic aberration while maintaining manufacturing feasibility through a single-layer structure.
2Illumination intensity
If protruding structures are added to the underlayer surface, then light extraction efficiency is improved, but the device complexity increases
Solution Approach 1:
Protruding structures with curved surfaces are introduced on the underlayer. These curved surfaces facilitate multiple internal reflections of light, increasing the probability of light extraction from the OLED structure. The curvature geometry naturally guides light rays through multiple bounce paths, enhancing light extraction efficiency without requiring complex multi-component systems.
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 effectively eliminates chromatic aberration by ensuring uniform light extraction and display quality across the panel, enhancing image uniformity and reducing total reflection phenomena.
Implementation Method 1
a longitudinal section of the underlayer has a contour which is concave from the first electrode toward the substrate as a whole, and in the longitudinal section, a thickness of a region of the underlayer close to a center of the panel is not greater than a thickness of a region of the underlayer close to an edge of the panel
Implementation Method 2
formed using a dual beam interference lithography process
Implementation Method 3
reducing chromatic aberration... reducing total reflection phenomena
Data Source
AI summary
A display panel, a method of manufacturing the display panel, and a display device are provided, the display panel includes a substrate; an underlayer on the substrate; a first electrode on the underlayer; an electroluminescent functional layer on the first electrode; and a second electrode on the electroluminescent functional layer, a longitudinal section of the underlayer has a contour which is concave from the first electrode toward the substrate as a whole, and in the longitudinal section, a thickness of a region of the underlayer close to a center of the panel is not greater than a thickness of a region of the underlayer close to an edge of the panel.