LED Recess Segmentation for Excitation Efficiency
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Solution Overview
Problem
Conventional light emitting devices face challenges in excitation efficiency, light extraction efficiency, and color reproduction rate, particularly when using LEDs with different peak wavelengths or phosphors in a single recess.
Innovation Solution
A light emitting device design featuring a recess divided by a barrier section with multiple regions, where LEDs with different peak wavelengths or phosphors are placed, and a resin layer with phosphors is used to enhance light emission, with wires routed through concave parts in the barrier section to connect lead electrodes to opposing LEDs, improving excitation and light extraction efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single recess is used to hold multiple LEDs with different peak wavelengths or phosphors, then device complexity is reduced, but excitation efficiency and light extraction efficiency deteriorate
Solution Approach 1:
The single recess is divided into multiple regions by a barrier section, creating separate compartments for different LEDs or phosphors. This segmentation allows each region to be optimized for its specific function while maintaining overall device integration, thereby improving excitation efficiency without significantly increasing device complexity.
Solution Approach 2:
Different regions within the recess are assigned different properties by placing specific LEDs or phosphors in each compartment. The barrier section creates localized zones with optimized characteristics for their respective functions, enabling each area to operate at peak efficiency while contributing to the overall device performance.
2Loss of energy
If a barrier section is added to divide the recess into multiple regions, then excitation efficiency and light extraction efficiency are improved, but device complexity increases
Solution Approach 1:
The barrier section implements segmentation by dividing the recess into distinct regions, allowing optimized placement of LEDs and phosphors. This structural division improves light extraction efficiency by preventing cross-contamination of light paths and optimizing excitation zones, while the barrier itself is designed to be integrated into the existing device architecture.
Solution Approach 2:
The barrier section serves multiple functions simultaneously: it acts as a physical divider for spatial separation, provides structural support for mounting components, and may serve as an optical element to guide or reflect light. This multi-functionality reduces the need for additional separate components, thereby limiting the increase in device 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
This design enhances the excitation and light extraction efficiency, improves color reproduction rates, and increases the reliability of the light emitting device by effectively emitting lights with different wavelengths, such as blue, green, and red, thereby improving the overall light output and color rendering index.
Implementation Method 1
Light emitting diodes (LEDs) are a kind of semiconductor devices that convert electric energy into light
Implementation Method 2
same phosphors or different phosphors disposed in divisional regions of a recess
Data Source
AI summary
A light emitting device includes a body having a first recess; a barrier section having a second recess and a third recess, protruding upward over a bottom surface of the first recess, and dividing the bottom surface of the first recess into a first region and a second region; a first light emitting diode disposed in the first region; a second light emitting diode disposed in the second region; a first lead electrode disposed in the first region; a second lead electrode disposed in the second region; a first wire electrically connecting the first lead electrode to the second light emitting diode through the second recess; and a second wire electrically connecting the second lead electrode to the first light emitting diode through the third recess.