Oblique LED Luminaire Mount for Heat Dissipation
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Solution Overview
Problem
Existing LED outdoor lighting fixtures face challenges in effective heat management and directional light distribution, particularly in ornate designs where heat dissipation is limited and upward light emission needs to be minimized.
Innovation Solution
A luminaire mount with obliquely angled mounting pads and arms facilitates efficient heat dissipation and directs light downward and outward, using a central mount on a lamppost with a transparent globe, incorporating a heat sink design and fins for enhanced cooling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If LEDs are mounted in ornate decorative fixtures with limited ventilation, then aesthetic appearance is improved, but heat dissipation deteriorates
Solution Approach 1:
The fixture is divided into separate functional zones: ornate decorative housing sections and dedicated heat sink sections with ventilation features. The mounting structure separates the LED light engines from the main decorative housing, allowing heat management functions to be distinct from aesthetic functions.
Solution Approach 2:
Different parts of the fixture have different properties: the housing is ornate and decorative, while specific mounting and heat dissipation areas have functional features like ventilation openings and heat sink structures. The mounting arms and pads provide localized heat management without compromising overall aesthetic appearance.
2Device complexity
If natural air convection is used for cooling, then device complexity is reduced, but heat dissipation effectiveness deteriorates in high ambient temperature and low air movement conditions
Solution Approach 1:
The heat sink structure is designed to utilize natural air convection currents that arise from the temperature difference between the hot LED components and the surrounding air. The ventilation openings and fin structures are configured to promote spontaneous air flow without requiring external fans or active cooling systems.
3Illumination intensity
If upward light emission is allowed in transparent globe fixtures, then light distribution is improved, but light pollution and energy waste increase
Solution Approach 1:
The mounting pads are angled asymmetrically to direct light primarily downward and outward along the street. The LED light engines are oriented at specific angles relative to the vertical axis, creating an asymmetric light distribution pattern that emphasizes horizontal illumination while minimizing upward emission into the sky.
Solution Approach 2:
Instead of allowing LEDs to emit light in all directions including upward, the fixture inverts the approach by specifically directing light downward and outward through angled mounting surfaces. The transparent globe is used differently - not to maximize upward emission but to protect the fixture while maintaining controlled light direction.
4Illumination intensity
If LED light engines are mounted at angles to create asymmetric light profiles, then directional light distribution is improved, but manufacturing precision requirements increase
Solution Approach 1:
The mounting pads are integrated directly with the mounting arms as unitary structures, combining the positioning and angular orientation functions into a single molded component. This integration ensures consistent angular relationships between mounting surfaces without requiring separate adjustment mechanisms or complex assembly procedures.
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 effectively manages heat and directs light efficiently, extending the LED lifespan and ensuring minimal upward light emission, maintaining a consistent wavelength and improving light distribution along streets while reducing heat-related issues.
Implementation Method 1
with natural air convection or fans used for cooling
Implementation Method 2
the LED circuit boards being attached to a finned heat sink
Implementation Method 3
A luminaire mount with obliquely angled mounting pads and arms facilitates efficient heat dissipation and directs light downward and outward, using a central mount on a lamppost with a transparent globe
Data Source
AI summary
A mount for a light assembly in a luminaire has a base section and mounting arms upstanding from the base section. Each mounting arm has an upward length and a width and has a lower portion and an upper portion. Mounting pads for light sources are unitary with or attached to the mounting arm upper portions and have an upward length and a width. The width of the mounting pads extends in a direction oblique to the width of the mounting arm lower portions. Preferably, the length of the mounting pads extends in a direction oblique to the length of the mounting arm lower portions. Light sources mounted on the mounting pads may emit beams of light directed obliquely away from each other and obliquely towards the base.