Recessed Micro-LED Emission Structure to Reduce Display Halo
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Solution Overview
Problem
Micro/mini LED displays suffer from a halo phenomenon due to the inherent light distribution characteristics of their flat structure, which affects display quality and increases manufacturing complexity and costs.
Innovation Solution
A display panel with a substrate and a light emission device layer featuring recessed surfaces on the light-emitting structures, reducing side viewing angle light intensity and enhancing positive viewing angle light emission, thereby minimizing the halo effect.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a box dam or blocking structure is used to limit the light-emitting range, then the halo phenomenon is avoided, but the process complexity and manufacturing costs increase
Solution Approach 1:
The patent applies curvature by forming a recessed portion (concave structure) on the light-emitting surface of the micro/mini LED chip. This curved/recessed surface modifies the light emission pattern by reducing side viewing angle light intensity, thereby eliminating the halo phenomenon without requiring additional blocking structures. The recessed surface acts as an integrated optical control feature that simplifies the overall device structure.
2Object-affected harmful factors
If a box dam or blocking structure is used to limit the light-emitting range, then the halo phenomenon is avoided, but the manufacturing costs increase
Solution Approach 1:
The patent merges the optical control function into the light-emitting chip structure itself by forming a recessed portion on the light-emitting surface. This integration eliminates the need for separate blocking structures or additional manufacturing steps, thereby reducing manufacturing complexity and costs while effectively addressing the halo phenomenon.
3Ease of manufacture
If the light-emitting structure uses a flat surface, then the manufacturing process is simple, but the side viewing angle light intensity is high causing halo effect
Solution Approach 1:
The patent introduces a recessed portion (curved/concave surface) on the light-emitting surface to modify the light distribution pattern. This curvature reduces the intensity of side viewing angle light while maintaining vertical viewing angle brightness, thereby eliminating the halo effect. The recessed structure can be formed through standard semiconductor processing techniques, maintaining manufacturing feasibility.
4Object-affected harmful factors
If the light-emitting structure uses a recessed surface, then the halo phenomenon is reduced, but the manufacturing process becomes more complex
Solution Approach 1:
The patent segments the light-emitting surface into different regions by forming a recessed portion, creating distinct optical zones. The recessed area specifically targets side viewing angle light emission, separating it from the main vertical emission path. This segmentation approach allows precise control of light distribution using standard photolithography and etching processes, minimizing additional manufacturing complexity.
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 simplifies the panel structure, reduces manufacturing costs, and improves display quality by minimizing the halo phenomenon and enhancing brightness in the positive viewing angle range.
Implementation Method 1
The surface on the side of the light-emitting structure facing away from the substrate includes a recess portion... reducing side viewing angle light intensity and enhancing positive viewing angle light emission
Data Source
AI summary
Provided are a display panel and a display device, belonging to the field of display technology. The display panel includes a substrate and a light emission device layer. The light emission device layer is located on a side of the substrate. The light emission device layer includes multiple light-emitting structures. A light-emitting structure includes a first electrode and a second electrode. In the direction perpendicular to the plane where the substrate is located, the first electrode and the second electrode are located on the side of the light-emitting structure facing the substrate. The surface on the side of the light-emitting structure facing away from the substrate includes a recess portion. At least part of the surface on the side of the light-emitting structure facing away from the substrate recesses toward a side adjacent to the substrate, so that a recess portion is formed.