Wire Grid Light-Emitting Structure With Phase Deflection Grooves
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Solution Overview
Problem
Existing display technologies using metal wire grid polarizers suffer from low light extraction efficiency and high power consumption due to the limited polarization properties of single-polarization light-emitting devices, which result in a complex structure and increased thickness.
Innovation Solution
A light-emitting device comprising a metal wire grid with a specific multilayer structure, including a first semiconductor layer, a light-emitting layer, a second semiconductor layer, and a phase deflection layer, where the second semiconductor layer features grooves and a phase deflection layer covers these grooves, enhancing light extraction efficiency by converting TE light to TM light.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a metal wire grid polarizer is used in a light-emitting device, then the polarization performance is improved, but the light extraction efficiency decreases and power consumption increases
Solution Approach 1:
The device is segmented into multiple functional layers including a semiconductor layer, metal wire grid layer, and phase deflection layer. The phase deflection layer is divided into multiple regions with different deflection angles to optimize light extraction while maintaining polarization performance.
Solution Approach 2:
The phase deflection layer acts as an intermediary between the light-emitting semiconductor layer and the metal wire grid polarizer. It converts the polarization state of light before it reaches the wire grid, enabling more efficient light extraction while maintaining the polarization filtering function.
2Device complexity
If a single-polarization light-emitting device is used, then the structure remains simple, but the light extraction efficiency is limited and device thickness increases
Solution Approach 1:
The invention transitions from a single-polarization approach to a multi-polarization approach by introducing the phase deflection layer with multiple deflection regions. This adds a dimensional aspect to polarization control, allowing light extraction optimization without significantly increasing structural complexity.
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 proposed structure increases light extraction efficiency and reduces power consumption by optimizing the polarization properties of the metal wire grid, thereby improving display performance and reducing the overall thickness of the display apparatus.
Implementation Method 1
a phase deflection layer covers the second semiconductor layer, and portions of the phase deflection layer are located in the plurality of grooves
Implementation Method 2
Metal wire grid (wire grid polarizer (WGP)) is a wire grid polarizing device with good polarization performance
Implementation Method 3
Wire grid polarizers can also be used as polarization beam splitters
Data Source
AI summary
A light-emitting device includes a metal wire grid; a first semiconductor layer located on a side of the metal wire grid; a light-emitting layer located on a side of the first semiconductor layer away from the metal wire grid; a second semiconductor layer located on a side of the light-emitting layer away from the metal wire grid, a surface of the second semiconductor layer away from the first semiconductor layer being provided with a plurality of grooves; and a phase deflection layer covering the second semiconductor layer, and portions of the phase deflection layer being located in the plurality of grooves.