OLED Light-Condensing Lens Refraction for Extraction Efficiency
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Solution Overview
Problem
Organic light-emitting display (OLED) devices face reduced light extraction efficiency due to light dispersion along the substrate plane, rather than being extracted outside, which affects the overall performance of the device.
Innovation Solution
Incorporating a light-condensing means with a convex or concave lens shape between the substrate and the organic light-emitting layer, which refracts light orthogonally to the substrate plane, thereby reducing dispersion and enhancing light extraction efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If light is emitted by the organic light-emitting layer, then light is generated, but light is dispersed in left and right directions along the substrate plane reducing extraction efficiency
Solution Approach 1:
The patent introduces a light-condensing means with a convex lens shape having a curved surface. This curvature refracts the light emitted by the organic light-emitting layer, redirecting dispersed light rays toward the normal direction perpendicular to the substrate plane, thereby concentrating light extraction and reducing lateral dispersion losses
Solution Approach 2:
The light-condensing means acts as an intermediary component positioned between the organic light-emitting layer and the external environment. This mediator structure modifies the light propagation path through refraction, converting dispersed light into a more directed beam without requiring changes to the light-emitting layer itself
2Illumination intensity
If a light-condensing means with convex or concave lens shape is introduced, then light extraction efficiency is improved, but device structure becomes more complex
Solution Approach 1:
The light-condensing means is integrated directly with the substrate structure, merging the light management function into the existing device architecture. This combination approach adds the necessary optical functionality without requiring completely separate, complex optical systems
Solution Approach 2:
The patent modifies the refractive index parameter of the light-condensing means material to optimize light refraction. By carefully selecting materials with appropriate refractive indices and adjusting the lens curvature parameters, the system achieves effective light extraction enhancement while maintaining manufacturing feasibility
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 light-condensing means effectively increases the light extraction efficiency by refracting light emitted by the organic layer in a direction orthogonal to the substrate plane, reducing dispersion and improving the ratio of extracted light to generated light.
Implementation Method 1
a light-condensing means disposed between the substrate and the light-emitting means. Light emitted by the light-emitting means may be converged on a focal point by the light-condensing means
Data Source
AI summary
An organic light-emitting display (OLED) device is provided. The OLED device includes: a substrate of which a pixel region is defined; a light-condensing means disposed on the pixel region of the substrate; a lower electrode disposed on the light-condensing means; an organic layer, which is disposed on the lower electrode and includes an organic light-emitting layer; and an upper electrode disposed on the organic layer. A method for manufacturing such an OLED device is also provided.