Segmented LED Cap for Uniform Light Distribution
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional LED illumination devices suffer from non-uniform light distribution, particularly weaker light intensity in the backward direction, making them inadequate replacements for incandescent light bulbs.
Innovation Solution
The design includes a cap structure with a reflective upper portion and a non-reflective, textured lower portion, along with a thermal dissipation structure that minimizes light blocking, ensuring uniform light distribution and enhanced backward light intensity by reflecting light and diffusing it through a textured surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If conventional LED devices are used, then energy efficiency is improved, but light distribution uniformity deteriorates
Solution Approach 1:
The cap is divided into multiple segments with different optical properties: a first segment with reflective coating to redirect backward light, a second segment that is non-reflective to allow direct light transmission, and a third transparent segment. This segmentation enables different portions of the cap to perform specialized functions that collectively achieve uniform omnidirectional light distribution while maintaining LED energy efficiency.
Solution Approach 2:
Different segments of the cap are assigned different local optical qualities: the first segment has reflective properties to bounce light forward, the second segment has diffusive properties through texturing to scatter light uniformly, and the third segment is transparent for direct light passage. This local differentiation of optical properties allows each region to optimize its function for achieving overall uniform light distribution.
2Volume of moving object
If conventional LED devices are used, then device size is reduced, but light distribution angle deteriorates
Solution Approach 1:
The patent addresses the narrow light angle problem by manipulating light in multiple dimensions through the segmented cap structure. The reflective first segment redirects light at different angles, the textured second segment diffuses light in multiple directions, and the transparent third segment allows forward light transmission. This multi-dimensional light manipulation achieves wide-angle omnidirectional distribution (200-360 degrees) without increasing the LED device size.
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 solution achieves improved light uniformity and increased backward light intensity, addressing the limitations of conventional LED devices and aligning with Energy Star compliance.
Implementation Method 1
a first segment coated with a reflective material
Implementation Method 2
the second segment has a textured surface
Data Source
AI summary
The present disclosure provides an illumination device. The illumination device includes a cap structure. The cap structure is partially coated with a reflective material operable to reflect light. The illumination device includes one or more lighting-emitting devices disposed within the cap structure. The light-emitting devices may be light-emitting diode (LED) chips. The illumination device also includes a thermal dissipation structure. The thermal dissipation structure is coupled to the cap structure in a first direction. The thermal dissipation structure and the cap structure have a coupling interface. The coupling interface extends in a second direction substantially perpendicular to the first direction. The thermal dissipation structure has a portion that intersects the coupling interface at an angle. The angle is in a range from about 60 degrees to about 90 degrees according to some embodiments.