Insulating Pattern Structure for Upward Light Extraction in Displays
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Solution Overview
Problem
Existing inorganic LED elements require a complex transfer method using dielectrophoresis, which limits their manufacturing efficiency and increases costs.
Innovation Solution
A display device with a concave-convex pattern on its insulating layers that reflects light emitted from the light-emitting element upwards, eliminating the need for a separate reflective member and simplifying the manufacturing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a reflective member is added to reflect light upwards, then light emission efficiency is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent combines the light reflection function with the insulating layer by forming a concave-convex pattern directly on the insulating layer. This integration eliminates the need for a separate reflective member, reducing device complexity while maintaining light emission efficiency through the patterned insulating layer that redirects light upward.
Solution Approach 2:
The insulating layer is given multiple functions: it provides electrical insulation and simultaneously acts as a light reflecting structure through its concave-convex pattern. This multi-functionality reduces the number of components needed in the display device while achieving both insulation and light management goals.
2Productivity
If a reflective member is added to reflect light upwards, then light emission efficiency is improved, but manufacturing process complexity increases
Solution Approach 1:
The manufacturing process combines the formation of the insulating layer and the reflective structure into a single step. The concave-convex pattern is formed on the insulating layer using standard semiconductor fabrication techniques, eliminating the need for separate reflective member deposition and simplifying the overall manufacturing process.
3Illumination intensity
If light is emitted from the side of the light-emitting element, then light emission occurs, but top emission efficiency is reduced
Solution Approach 1:
The concave-convex pattern introduces curved surfaces to the insulating layer. These curved surfaces redirect light that would otherwise travel horizontally from the light-emitting element, bending the light paths upward toward the top emission direction and improving top emission efficiency.
Solution Approach 2:
The patent redirects light from horizontal propagation to vertical propagation by using the concave-convex pattern. This dimensional redirection of light paths transforms the emission direction, channeling more light toward the top surface for improved display performance.
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 concave-convex pattern enhances top emission efficiency by directing light emitted from the side of the light-emitting element upwards, while also simplifying the manufacturing process by removing the need for a reflective electrode or bank.
Implementation Method 1
at least one concave-convex pattern disposed on each of the first insulating pattern and the second insulating pattern
Data Source
AI summary
A display device and a method for manufacturing same are provided. A display device comprises: a first electrode; a second electrode arranged to be spaced apart from and face the first electrode; a first insulation pattern having at least partial region arranged to overlap the first electrode and having a first side surface spaced apart from a first end portion of the first electrode; a second insulation pattern having at least a partial region arranged to overlap the second electrode and having a second side surface spaced apart from a second end portion of the second electrode facing the first end portion, the second side surface facing the first side surface; at least one uneven pattern provided on the first insulation pattern and the second insulation pattern; and at least one light-emitting element provided between the first insulation pattern and the second insulation pattern and having opposite end portions that are electrically connected to the first electrode and the second electrode, respectively.