LED Bulb Envelope with Light-Dispersing Features for Uniform Distribution
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Solution Overview
Problem
LED light bulbs suffer from high directionality, resulting in 'hot spots' where light intensity is unevenly distributed, making them less desirable for general-purpose consumer lighting compared to incandescent bulbs.
Innovation Solution
The introduction of a bulb envelope with light-dispersing features such as dimples, bumps, or grooves that vary in thickness and distribution to scatter light uniformly, reducing hot spots and achieving a 20% or less deviation in light intensity across a 135° zone.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If LEDs are used in light bulbs, then energy efficiency is improved, but light distribution uniformity deteriorates due to high directionality creating hot spots
Solution Approach 1:
The bulb envelope is segmented into multiple regions with different thicknesses (first region with first thickness, second region with second thickness greater than the first). This segmentation creates different light transmission paths that scatter light more uniformly, reducing hot spots while maintaining LED energy efficiency
Solution Approach 2:
Different regions of the bulb envelope are given different local qualities through varying thickness. The first region has a first thickness while the second region has a greater second thickness, creating localized light scattering properties that improve overall light distribution uniformity without sacrificing the energy efficiency of LEDs
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 light-dispersing features effectively distribute light uniformly, reducing hot spots and enhancing the overall light emission uniformity, making LED light bulbs more comparable to incandescent bulbs in terms of lighting quality.
Implementation Method 1
The introduction of a bulb envelope with light-dispersing features such as dimples, bumps, or grooves that vary in thickness and distribution to scatter light uniformly
Data Source
AI summary
A pear-shaped light-emitting diode (LED) light bulb housing is provided with a plurality of light-dispersing thickness variations in the bulb envelope. Dimples, bumps, or v-shaped grooves are provided in a middle portion of the bulb envelope in order to uniformly disperse light from LEDs as the light passes through the bulb envelope.