Spaced Insulating Layer Patterns for LED Display Light Extraction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current display devices face challenges in enhancing light emission efficiency of light-emitting elements, particularly due to limitations in the design and structure of insulating layers and contact electrodes, which affect the alignment and emission of light from light-emitting diodes.
Innovation Solution
The proposed display device incorporates a second insulating layer with patterns that cover light-emitting elements, where the patterns are spaced apart to improve light emission efficiency, and contact electrodes are designed to avoid overlapping with the ends of the light-emitting elements, allowing for better light reflection and emission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the insulating layer is designed as a continuous pattern to fix the light-emitting elements, then the fixing reliability is improved, but the light emission efficiency deteriorates due to increased light absorption
Solution Approach 1:
The insulating layer is divided into multiple patterns arranged in an array, where each pattern individually supports the light-emitting elements. This segmentation reduces the total insulating material volume, thereby decreasing light absorption while maintaining structural support through the distributed pattern arrangement
Solution Approach 2:
The insulating patterns are strategically positioned to provide localized support exactly where the light-emitting elements need fixation, rather than using a continuous layer. This allows light to pass through the spaces between patterns, improving emission efficiency while maintaining adequate mechanical support
2Reliability
If the contact electrode overlaps with the end of the light-emitting element to ensure electrical contact, then the electrical connection reliability is improved, but the light emission efficiency deteriorates due to light absorption by the electrode
Solution Approach 1:
The contact electrode is extracted from overlapping the light-emitting element end and repositioned to contact the side surface instead. This removes the harmful light absorption effect while maintaining electrical connection through the side surface contact path
Solution Approach 2:
The side surface of the light-emitting element serves as an intermediary contact point, allowing electrical connection without the electrode directly overlapping the end region where light emission occurs, thus avoiding light absorption by the electrode
Data Source
AI summary
A display device comprises a substrate, a first electrode on the substrate and extending in a first direction, a second electrode on the substrate and extending in the first direction, the second electrode being spaced apart from the first electrode in a second direction, a first insulating layer on the first electrode and the second electrode, light-emitting elements on the first insulating layer, the light-emitting elements being disposed on the first electrode and the second electrode, a second insulating layer disposed on the light-emitting elements, a first contact electrode disposed on the first electrode and electrically contacting the light-emitting elements, and a second contact electrode disposed on the second electrode and electrically contacting the light-emitting elements. The second insulating layer comprises patterns that cover at least part of the light-emitting elements and are spaced apart from one another in the first direction.