Shielded Core Light-Emitting Structure for Larger Side Emission
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Solution Overview
Problem
Existing light-emitting devices face a decrease in luminous efficiency due to polarization phenomena, and they have limited emission area, which affects their performance and efficiency.
Innovation Solution
A light-emitting device is designed with a base semiconductor layer, a core structure having a body portion and a shielding portion, and light-emitting portions on the side surface of the body portion. The shielding portion acts as a mask to prevent insulating material from depositing on the side surface of the body portion, allowing for increased emission area and reduced polarization effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If light-emitting devices use conventional structures, then manufacturing is simpler, but luminous efficiency decreases due to polarization phenomena
Solution Approach 1:
The core structure employs asymmetric geometry with a body portion and a shielding portion having different widths in the second direction. The shielding portion has a greater width than the body portion, creating an asymmetric configuration that suppresses polarization effects and improves luminous efficiency by modifying the electromagnetic field distribution around the light-emitting portions.
Solution Approach 2:
The invention introduces a shielding portion that extends in the second direction (width direction) beyond the body portion's boundaries. This dimensional extension in the lateral direction creates a three-dimensional shielding structure that effectively counteracts polarization effects without compromising the vertical light-emitting function.
2Area of stationary object
If light-emitting devices use conventional structures, then device complexity is lower, but emission area is limited
Solution Approach 1:
The core is segmented into two distinct functional portions: a body portion that provides structural support and a shielding portion that extends laterally to increase emission area. This segmentation allows each portion to serve its specific function while collectively achieving both increased emission area and reduced polarization effects.
Solution Approach 2:
The shielding portion extends in the lateral direction (second direction) beyond the body portion's width, effectively increasing the emission area in the horizontal plane. This dimensional expansion allows more light-emitting portions to be accommodated without increasing vertical height, thereby increasing total emission area.
3Loss of energy
If shielding portion width is increased to suppress polarization, then luminous efficiency improves, but manufacturing precision requirements increase
Solution Approach 1:
The shielding portion is designed with a specific local quality of having greater width than the body portion in the second direction. This localized width increase is precisely where needed to suppress polarization effects, while other portions of the structure maintain their original dimensions, allowing for targeted manufacturing precision requirements only where critical.
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 design enhances luminous efficiency by suppressing polarization effects and increasing the emission area, leading to improved performance and reduced manufacturing complexity and costs.
Implementation Method 1
The shielding portion acts as a mask to prevent insulating material from depositing on the side surface of the body portion
Data Source
AI summary
A light-emitting device includes a base semiconductor layer, at least one core provided on the base semiconductor layer, the at least one core including a body portion extending in a first direction and a shielding portion provided at an upper end of the body portion, where a width of a lower surface of the shielding portion in a second direction orthogonal to the first direction is greater than a width of the body portion in the second direction, a first insulating layer provided on an upper surface of the base semiconductor layer and an upper surface of the shielding portion, and at least one light-emitting portion provided on a side surface of the body portion.