Display Panel Light-Shielding Assembly for Halo Suppression
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Solution Overview
Problem
MicroLED displays suffer from a halo phenomenon where light from bright regions spills into dark regions, causing blurry images and affecting display quality due to uncontrolled light emission.
Innovation Solution
A light control assembly comprising a first light-shielding structure, a spacer structure, and a second light-shielding structure is used to absorb and direct light emissions, with the second light-shielding structure having an opening that overlaps the light-emitting element to reduce halo effects and improve display clarity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If no light control structure is used, then the light emission is simple and device complexity is low, but light spreads to adjacent regions causing halo phenomenon and poor display quality
Solution Approach 1:
The light control assembly is segmented into multiple functional layers: a first light-shielding structure (bottom layer), a spacer structure (middle layer), and a second light-shielding structure (top layer). Each layer performs a specific function in controlling light propagation, with the spacer structure providing vertical separation and the opening allowing controlled light passage. This segmentation enables precise light management while maintaining structural organization.
Solution Approach 2:
The patent introduces a vertical dimension to light control by stacking light-shielding structures at different heights. The spacer structure creates vertical separation between the first and second light-shielding structures, forming a three-dimensional light control architecture. The opening in the second light-shielding structure aligns vertically with the light-emitting element, allowing light to pass through controlled pathways in the vertical direction while blocking lateral light spread.
2Manufacturing precision
If a light control assembly is added to reduce halo, then display quality is improved, but the device complexity increases
Solution Approach 1:
The light control assembly implements local quality control by providing different light management functions in different spatial regions. The opening in the second light-shielding structure is positioned to align with the light-emitting element, allowing light to pass through in the central region while the surrounding areas are blocked by the light-shielding structures. This creates localized light control that improves display clarity without requiring complete structural redesign.
Solution Approach 2:
The spacer structure serves as an intermediary element between the first and second light-shielding structures. It provides vertical separation and positioning, ensuring that the second light-shielding structure is held at the correct height and alignment relative to the light-emitting element. The spacer structure mediates the interaction between light and the light-shielding structures, enabling precise light control while simplifying the overall assembly process.
Data Source
AI summary
Provided are a display panel. The display panel includes a substrate, a light-emitting element, and a light control assembly. The light-emitting element is located on a side of the substrate. The light control assembly and the light-emitting element are on the same side of the substrate. The light control assembly includes a first light-shielding structure, a spacer structure, and a second light-shielding structure which are stacked. At least part of the first light-shielding structure surrounds the light-emitting element. The spacer structure is located on the side of the first light-shielding structure facing away from the substrate. The second light-shielding structure is located on the side of the spacer structure facing away from the first light-shielding structure. In a first direction, the maximum distance from the second light-shielding structure to the substrate is greater than or equal to the maximum distance from the light-emitting element to the substrate.