Lens Structure for Lateral Light Distribution
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Solution Overview
Problem
Existing light emitting devices face challenges in optimizing light distribution characteristics, particularly in achieving superior light emitting efficiency in lateral directions while minimizing light emission in upper directions.
Innovation Solution
A light emitting apparatus is designed with a substrate, a light emitting device package, a fluorescent layer, an encapsulant resin layer, and a lens structure featuring specific recessed parts that refract and reflect light, directing it laterally. The encapsulant resin layer surrounds the fluorescent layer, and the lens has a concavo-convex structure to enhance lateral light emission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a lens structure is added to improve lateral light emission, then light distribution efficiency is improved, but device complexity increases
Solution Approach 1:
The patent merges the encapsulant resin layer and the lens structure into a single integrated component. The lens portions are formed as protrusions directly on the light emitting device package, eliminating the need for separate lens assemblies. This integration maintains high light distribution efficiency while reducing overall device complexity and the number of discrete components.
Solution Approach 2:
The encapsulant resin layer serves multiple functions simultaneously: it provides optical encapsulation, forms the lens structure for light extraction, and enables both lateral and upward light emission through its multi-zone refractive index design. This multi-functionality improves light distribution efficiency without adding separate dedicated components, thereby avoiding increased 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
The apparatus achieves peak light emission at angles between 70° to 85° in the lateral direction, effectively reducing light emission upwards, thereby improving light distribution efficiency.
Implementation Method 1
a lens structure featuring specific recessed parts that refract and reflect light, directing it laterally
Implementation Method 2
a lens structure featuring specific recessed parts that refract and reflect light, directing it laterally
Data Source
AI summary
Provided is a light emitting apparatus. The light emitting apparatus includes a substrate; a light emitting device on the substrate; a fluorescent layer formed on the substrate and the light emitting device to surround the light emitting device; an encapsulant resin layer formed on the substrate and the fluorescent layer to surround the fluorescent layer; and a lens disposed on the light emitting device and supported by the substrate, wherein the lens includes a lens body having a first recess formed at a center of a top surface of the lens body and a second recess formed at a center of a bottom surface of the lens body, and a lens supporter provided at the bottom surface of the lens body to support the lens body such that the lens body is spaced apart from the substrate.