LED Lens Ladder Inner Wall Light Intensity
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Solution Overview
Problem
Conventional lateral light-emitting diode structures have low light intensity, making them insufficient for use in decorative lighting applications due to inefficient light reflection and transmission patterns.
Innovation Solution
A light-emitting diode structure featuring a cylindrical lens with a ladder-like inner wall, comprising upper and lower inclined wall portions and a connecting wall, designed to enhance light reflection and transmission, increasing the intensity of both lateral and normal light emissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a conventional conical recess is used in the lens, then the structure is simple to manufacture, but the light intensity is insufficient for decorative lighting applications
Solution Approach 1:
The lens recess is divided into multiple inclined wall portions (first, second, third inclined wall portions) with different slopes instead of a single conical surface. This segmentation allows each portion to control light reflection at different angles, thereby increasing overall light intensity while maintaining manufacturing feasibility through modular design
Solution Approach 2:
Different portions of the lens recess are assigned different local properties through varying slope angles. The first inclined wall portion has a steeper slope for specific light redirection, while the second and third portions have progressively shallower slopes to control light distribution in different directions, optimizing light intensity locally across the lens structure
2Adaptability or versatility
If a lens with a single sloped surface is used, then the manufacturing process is simple, but the light distribution pattern is limited and insufficient for decorative applications
Solution Approach 1:
The single sloped surface is segmented into multiple inclined wall portions with different slope angles. This allows the lens to generate diverse light distribution patterns (lateral light, upward light, downward light) from a single integrated structure, enhancing adaptability for various decorative applications while maintaining reasonable manufacturing complexity
Solution Approach 2:
The lens design transitions from a two-dimensional conical surface to a three-dimensional multi-faceted structure with inclined wall portions at different angles and positions. This dimensional complexity enables control over light distribution in multiple directions simultaneously, providing versatile lighting patterns for decorative purposes
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 improved light-emitting diode structure achieves a more effective light distribution, allowing for increased brightness in specific directions, making it suitable for decorative lighting applications.
Implementation Method 1
when a light, upwardly emitted from the light-emitting diode chip 130, reaches the inner wall of the conical recess 112, the majority of the light reflected by the inner wall of the conical recess 112 is transformed into a lateral light
Implementation Method 2
only a portion of the light passing through the inner wall of the conical recess 112 is transformed into a normal light
Data Source
AI summary
A light-emitting diode structure is provided. The light-emitting diode structure includes a light-emitting diode chip, a lead frame for electrically connecting and supporting the light-emitting diode chip, and a lens covering the light-emitting diode chip and to partially cover the lead frame. A recess disposed on the upper portion of the lens has a ladder-like inner wall formed of an upper inclined wall portion, a lower inclined wall portion, and a connecting wall portion connected to the upper and lower inclined wall portions. The slope of the upper inclined wall portion is greater than that of the lower inclined wall portion, and the slope of the connecting wall portion is greater than the upper and lower inclined wall portions.