LED Light Assembly with Curvilinear Redirection Element
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Solution Overview
Problem
Conventional light-emitting diode (LED) lighting systems face challenges in achieving uniform light distribution and longevity due to heat-related premature failures and the inherent directionality of light output, which makes it difficult to meet Energy Star luminous intensity distribution requirements, especially in the range from 180° to 135°.
Innovation Solution
A lighting assembly with a cover having a curvilinear shaped surface and an internal redirection element that reflects and transmits light to improve light distribution, utilizing a heat sinking configuration and multiple geometries to manage heat and direct light output effectively, including a housing with air channels for convective cooling and a circuit board with thermally conductive materials to extend the lifespan of the light sources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If light-emitting diode lights are used to reduce power consumption and environmental impact, then energy efficiency and longevity are improved, but uniform light distribution in all directions is worsened due to the inherent directionality of LED light output
Solution Approach 1:
The LED lighting system is divided into multiple LED modules arranged in a circular pattern, with each module containing multiple LEDs positioned at different angles. This segmentation allows light to be emitted from multiple directions simultaneously, achieving uniform omnidirectional illumination while maintaining the energy efficiency of individual LEDs
Solution Approach 2:
The patent transitions from conventional single-direction or limited-angle LED illumination to three-dimensional omnidirectional light distribution. By arranging LEDs vertically and radially around a central axis, the system achieves uniform light output in all horizontal and vertical directions, resolving the directional limitation of standard LEDs
2Duration of action of stationary object
If heat removal is not effectively managed in LED lighting, then longevity is reduced due to heat-related premature failures, but adding heat removal mechanisms increases device complexity
Solution Approach 1:
The housing structure is merged with the heat removal function by incorporating fins directly into the housing walls. This integration allows the housing to serve dual purposes: structural enclosure and thermal management, eliminating the need for separate heat sinks or cooling mechanisms while extending LED lifespan through effective passive cooling
Solution Approach 2:
The lighting assembly employs passive convective cooling where the finned housing structure naturally dissipates heat through air convection without requiring active cooling components. The design allows heat to self-dissipate through the engineered surface area, reducing complexity while maintaining thermal management effectiveness
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 enhances light distribution and longevity of LED lighting systems, meeting Energy Star requirements by effectively managing heat and directing light output, resulting in a cost-effective and energy-efficient lighting solution.
Implementation Method 1
An internal redirection element is coupled to the circuit board and has a curvilinear shaped surface for reflecting a first portion of light from the plurality of light sources through the redirection portion of the cover
Implementation Method 2
transmitting a second portion of light therethrough
Implementation Method 3
A housing with air channels for convective cooling
Implementation Method 4
a circuit board with thermally conductive materials to extend the lifespan of the light sources
Data Source
AI summary
A light assembly includes a cover having an upper portion and a redirection portion. The cover has a longitudinal axis and a housing that is coupled to the cover. A lamp base is coupled to the housing. A circuit board is disposed within the housing. The circuit board has a plurality of light sources thereon. An internal redirection element is coupled to the circuit board and has a curvilinear shaped surface for reflecting a first portion of light from the plurality of light sources through the redirection portion of the cover and transmitting a second portion of light therethrough.