Laser-Processed Porous Layer for High-Directivity Light Extraction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing methods for forming light-extracting layers using an inkjet method often result in significant scattered light, making it difficult to achieve the desired light distribution characteristics and preventing the extraction of light with high directivity.
Innovation Solution
A method involving the preparation of a porous layer on a substrate, partial removal of discrete island-like regions using laser light, and subsequent application of adhesive layers to create a light-extracting layer with specific refractive index regions, which allows for the production of an optical member capable of extracting light with high directivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If an inkjet method is used to form the light-extracting layer, then the light extraction capability is achieved, but scattered light increases and directivity is reduced
Solution Approach 1:
The light-extracting layer is segmented into multiple discrete high-refractive index regions (island-like structures) rather than forming a continuous layer. This segmentation confines light extraction to specific localized areas, preventing scattered light from propagating across the entire surface and thereby improving directivity while maintaining extraction capability.
Solution Approach 2:
Different regions of the light-extracting layer are given different refractive indices: the island-like regions have high refractive index for light extraction, while the surrounding low-refractive index regions suppress scattering. This local differentiation of optical properties enables controlled light extraction at specific locations while preventing unwanted scattering elsewhere.
2Illumination intensity
If the light-extracting layer is formed with high refractive index regions, then light extraction is enabled, but light directivity is compromised due to scattering
Solution Approach 1:
By dividing the light-extracting layer into discrete island-like high-refractive index regions separated by low-refractive index regions, the patent confines light extraction to specific localized areas. This segmentation prevents light from scattering across the entire surface, thereby maintaining high directivity while enabling effective light extraction at the intended locations.
Solution Approach 2:
The low-refractive index regions act as intermediary structures between the high-refractive index island-like regions and the surrounding medium. These intermediary regions control and direct light propagation by preventing scattering, thereby mediating between the light extraction function and the directivity requirement.
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 method effectively suppresses light scattering and enhances the directivity of extracted light, achieving the desired light distribution characteristics.
Implementation Method 1
applying laser light to the porous layer to remove a partial region of the porous layer
Implementation Method 2
arranging a first adhesive layer on the porous layer after the step B
Data Source
AI summary
Provided is an optical member production method including: a step A of preparing a porous layer supported on a substrate; a step B of applying laser light to the porous layer to remove a partial region of the porous layer, the partial region to be removed including a plurality of discrete island-like regions; and a step C of arranging a first adhesive layer on the porous layer after the step B.