LED Package Integrating Wire-Grid Polarizer
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Solution Overview
Problem
Conventional polarization conversion systems (PCS) used in optical systems to convert non-polarized light to polarized light are bulky, making it difficult to reduce the volume of the optical system.
Innovation Solution
An LED package is designed with a substrate, an LED chip, a polarizer, and a supporter, where the polarizer is integrated using the supporter to support it, enabling the LED package to provide polarized light while maintaining a small volume, utilizing a wire-grid polarizer with a transparent substrate and metal wires arranged perpendicular to each other, and a fluorescent layer to enhance light efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a conventional polarization conversion system (PCS) is used to convert non-polarized light to polarized light, then the optical system can provide polarized light, but the volume of the optical system becomes large
Solution Approach 1:
The patent combines the polarizer directly with the LED chip packaging structure, integrating the polarization conversion function into the existing LED package rather than using a separate conventional PCS. This merging of functions reduces the overall optical system volume while maintaining polarized light output capability
Solution Approach 2:
The patent uses a wire-grid polarizer structure where metal wires are arranged in a specific dimensional pattern (grid configuration) to achieve polarization conversion in a compact form factor. This dimensional arrangement of the polarizing elements enables efficient polarization without requiring the bulkier conventional PCS architecture
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 LED package achieves high light efficiency by recycling light, with 73%-83% of emitted light becoming polarized, and reduces the volume of the optical system compared to conventional PCS, while being robust and operable at high temperatures.
Implementation Method 1
The polarizer is disposed above the LED chip... the LED package can provide a polarized light
Implementation Method 2
utilizing a wire-grid polarizer with a transparent substrate and metal wires arranged perpendicular to each other, and a fluorescent layer to enhance light efficiency
Data Source
AI summary
A light-emitting diode (LED) package including a substrate, an LED chip, a polarizer, and a supporter is provided. The LED chip is disposed on the substrate. The polarizer is disposed above the LED chip. The supporter is disposed on the substrate for supporting the polarizer.