Edge Shielding Structure for Higher-Purity Light Conversion
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Solution Overview
Problem
Conventional lighting devices using light converting materials like quantum dots face inefficiencies in converting input light, leading to impure output light and degraded quality.
Innovation Solution
The proposed electronic device incorporates a substrate with a shielding structure and a layer, where the shielding structure is disposed close to the edge of the substrate and includes steps that reduce the intensity of unconverted input light by filtering it through a second substrate treated with metal ions, nanoparticles, or yellowing polymers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If light converting materials are used to convert input light, then output light with different wavelength is produced, but conversion efficiency is not 100% causing impure output light
Solution Approach 1:
The patent extracts and removes the harmful unconverted input light from the optical path by introducing a shielding structure positioned between the light source and light converting materials. This shielding structure blocks the unconverted light before it reaches the light converting materials, preventing it from degrading the output light quality.
Solution Approach 2:
The patent introduces a shielding structure as an intermediary element between the light source and light converting materials. This intermediary component selectively blocks unconverted input light while allowing the converted output light to pass through, thereby improving overall conversion efficiency and output purity.
2Object-generated harmful factors
If shielding structure is added to filter unconverted light, then output light purity is improved, but device complexity increases
Solution Approach 1:
The shielding structure is positioned locally at the edge of the substrate close to the light source, rather than requiring a complete optical path modification. This localized approach achieves effective filtering of unconverted light while minimizing the overall structural complexity and maintaining ease of device fabrication.
Solution Approach 2:
The shielding structure employs a composite design combining a substrate with specific optical properties and a shielding layer disposed on it. This composite structure achieves effective light filtering while maintaining structural integrity and compatibility with existing device architectures.
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 enhances the conversion efficiency of light converting materials, resulting in purer output light with improved quality by reducing the intensity of unconverted blue light, thereby emitting colors closer to red or green primary colors.
Implementation Method 1
the shielding structure includes a first surface away from the substrate, a first step and a second step... filtering it through a second substrate treated with metal ions, nanoparticles, or yellowing polymers
Data Source
AI summary
An electronic device includes a substrate, a shielding structure disposed on the substrate, and a layer disposed on the substrate. The substrate includes an edge, and the shielding structure is disposed close to the edge. The shielding structure includes a first surface away from the substrate, a first step and a second step. In a cross-section view of the electronic device, the layer is contacted with the first surface, the first step and the second step.