Adjustable LED Lighting Fixture for Roadway Illumination Patterns
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Solution Overview
Problem
Conventional roadway lighting fixtures using high pressure sodium (HPS) bulbs require replacement to change lighting patterns, whereas LED fixtures also need full replacement for pattern adjustments, lacking the ability to adjust shape and brightness without replacing the entire fixture.
Innovation Solution
The LED lighting fixture features adjustable panels with LEDs mounted at various angles and equipped with optical elements, allowing for customizable illumination patterns by adjusting the mounting angles of individual LEDs or groups of LEDs, and using secondary optics and reflectors to achieve desired light distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional HPS bulbs with reflectors are used to illuminate roadway areas, then high lumen output is achieved, but much of the light is lost illuminating unintended spaces and the fixture cannot be adjusted to change lighting patterns without replacement
Solution Approach 1:
The fixture is divided into multiple independently adjustable LED modules or bars that can be individually oriented at different angles. Each segment can be adjusted to direct light toward specific roadway areas, allowing the system to adapt to different illumination patterns (Type I-V) without replacing the entire fixture, while reducing light loss by precisely directing each segment's output.
Solution Approach 2:
The fixture incorporates adjustable mounting mechanisms that allow the LED modules to be dynamically repositioned at various angles and orientations. This dynamic adjustability enables the lighting pattern to be modified by simply changing the angle of individual modules rather than replacing the fixture, while the precise angular control ensures light is directed only toward intended roadway areas.
2Adaptability or versatility
If HPS bulbs with reflectors are used to achieve omni-directional illumination, then high lumen output is provided, but the entire fixture must be replaced to change the shape and brightness of light output
Solution Approach 1:
The fixture is divided into multiple independently adjustable LED modules or bars that can be individually oriented at different angles. Each segment can be adjusted to direct light toward specific roadway areas, allowing the system to adapt to different illumination patterns (Type I-V) without replacing the entire fixture, while reducing light loss by precisely directing each segment's output.
Solution Approach 2:
The fixture incorporates adjustable mounting mechanisms that allow the LED modules to be dynamically repositioned at various angles and orientations. This dynamic adjustability enables the lighting pattern to be modified by simply changing the angle of individual modules rather than replacing the fixture, while the precise angular control ensures light is directed only toward intended roadway areas.
3Adaptability or versatility
If LEDs are mounted at fixed angles on panels to produce specific illumination patterns, then manufacturing precision is improved, but the fixture cannot be adjusted to simulate different roadway illumination types
Solution Approach 1:
The fixture incorporates adjustable mounting mechanisms that allow the LED modules to be dynamically repositioned at various angles and orientations. This dynamic adjustability enables the lighting pattern to be modified by simply changing the angle of individual modules rather than replacing the fixture, while the precise angular control ensures light is directed only toward intended roadway areas.
Solution Approach 2:
The fixture allows for variable adjustment of mounting parameters (angles and orientations) for different LED modules. By changing these parameters during installation or maintenance, the same fixture can be configured to produce different illumination patterns (Type I-V) without requiring different manufacturing specifications for each pattern type.
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
Enables flexible and efficient adjustment of illumination patterns, achieving high lumen output comparable to traditional HPS bulbs, with the ability to simulate various roadway illumination types without replacing the entire fixture, thus reducing maintenance costs and improving light utilization efficiency.
Implementation Method 1
one or more LED dies (or chips) are mounted within a LED package or on an LED module
Implementation Method 2
LEDs offer improved light efficiency, a longer lifetime, lower energy consumption
Implementation Method 3
Each LED strip may be straight or curved, and may be angled with respect to one or more dimensions. In another example, each LED, group or strip of LEDs may include different optical elements such as secondary optics and/or reflectors
Data Source
AI summary
A light emitting diode (LED) lighting fixture for achieving a desired illumination pattern includes a panel and one or more LEDs attached to a surface of the panel. One or more of the LEDs may be mounted at an angle to the surface.