Micro LED Cover Structure With Through-Holes for Light Extraction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Display apparatuses with micro-sized light-emitting diodes (micro LEDs) face challenges in improving light extraction efficiency while suppressing reflection of unnecessary light, as existing solutions often require complex optical members and separate light-shielding layers that increase the number of layers and complexity.
Innovation Solution
A display apparatus design featuring a cover member with through holes and light-shielding layers on its surfaces, where the protective film serves as both a cover and adhesive, enhancing light extraction efficiency by reducing reflections and simplifying the optical structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a reflection suppression layer with light-transmissive openings is used, then light extraction efficiency is improved, but the number of layers and device complexity increases
Solution Approach 1:
The patent merges the protective film and light-shielding layer into a single integrated cover member. This eliminates the need for separate protective film and light-shielding layers, reducing the total number of layers while maintaining both protection and light extraction functions. The through-holes in the cover member provide light extraction paths without requiring additional reflection suppression layers.
Solution Approach 2:
The cover member is designed to perform multiple functions simultaneously: it serves as a protective cover, provides light extraction paths through through-holes, and acts as a light-shielding layer. This multi-functional design eliminates the need for separate components, reducing device complexity while improving light extraction efficiency.
2Object-affected harmful factors
If separate light-shielding layers are added to suppress unnecessary light, then reflection suppression is improved, but device complexity increases
Solution Approach 1:
The light-shielding function is merged into the cover member by forming a light-shielding layer on its second main surface. This integration eliminates the need for separate light-shielding layers positioned between the substrate and cover member, simplifying the optical structure while maintaining effective suppression of unnecessary light reflection.
3Reliability
If multiple optical members are used to improve display characteristics, then display quality is improved, but the number of layers and manufacturing complexity increase
Solution Approach 1:
The cover member is designed as a multi-functional component that provides protection, light extraction, and light shielding simultaneously. This reduces the total number of components that need to be manufactured and assembled, simplifying the manufacturing process while maintaining improved display characteristics through controlled light extraction and reflection suppression.
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
This configuration improves light extraction efficiency and suppresses unnecessary reflections, reducing the complexity of optical members and layers, thereby enhancing display characteristics and preventing color mixture between pixels.
Implementation Method 1
a light-shielding layer provided on at least one of first main surface and second main surface of the cover member
Implementation Method 2
a protective film covering the light-emitting elements and provided between the substrate and the cover member
Data Source
AI summary
A display apparatus includes a plurality of light-emitting elements arrayed on a substrate, a cover member having a first main surface serving as a display surface and a second main surface opposite to the first main surface, the second main surface being disposed facing the substrate, the cover member having a through hole passing through the first main surface and the second main surface in a region overlapping the light-emitting elements, a protective film covering the light-emitting elements and provided between the substrate and the cover member, and a light-shielding layer provided to at least one of the first main surface and the second main surface of the cover member.