Angled LED Fixture Layout for Uniform Display Lighting
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Solution Overview
Problem
Conventional LED lighting fixtures suffer from uneven light distribution, high costs, complex assembly, and cumbersome designs that limit their application, particularly in refrigerated display cases where they fail to provide effective illumination due to 'hot spots' and heat conductivity issues.
Innovation Solution
An elongated lighting fixture with angularly positioned LED modules, a copper trace circuit board, and a radio frequency control unit, which allows for remote operation, enhancing light distribution, durability, and energy efficiency while being suitable for cold temperature applications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If LEDs are arranged in a single linear array, then the fixture structure is simple, but the light distribution is uneven with hot spots
Solution Approach 1:
The patent transitions from a single-dimensional linear LED array to a two-dimensional angular configuration by mounting LED arrays on support members positioned at different angles (e.g., 45 degrees) relative to the housing. This dimensional change enables light to be emitted in multiple directions simultaneously, creating more uniform light distribution across the illuminated area and eliminating hot spots that characterize single-linear arrangements.
Solution Approach 2:
The patent divides the LED lighting system into multiple segmented arrays mounted on separate support members at different angular positions. Each LED array segment contributes to illuminating a specific angular zone, and the combination of these segmented arrays produces comprehensive uniform coverage. This segmentation approach allows independent optimization of each array while achieving overall uniformity.
2Temperature
If conventional LED fixtures are used in refrigerated environments, then installation is straightforward, but thermal management becomes problematic due to heat conductivity issues
Solution Approach 1:
The patent introduces thermally conductive adhesive as an intermediary material between the LED modules and the housing structure. This intermediary serves dual functions: it provides mechanical bonding to secure LEDs in their angular positions while simultaneously acting as a thermal pathway to conduct heat away from the LED junctions. The housing structure itself acts as a heat sink, drawing thermal energy from the LEDs through the conductive adhesive, thereby enabling effective thermal management in refrigerated environments where conventional fixtures fail.
3Illumination intensity
If complex assembly procedures are used to achieve proper LED alignment, then lighting performance improves, but assembly time and cost increase
Solution Approach 1:
The patent merges multiple functions into the support members: they provide structural mounting, define precise angular orientations, position LED arrays correctly in space, and facilitate thermal conduction. By combining these functions into integrated components rather than separate elements requiring sequential assembly, the design achieves proper LED alignment and optimal light distribution while simplifying the manufacturing process. The support members are designed as pre-configured units that can be installed as complete assemblies, reducing the number of discrete steps required.
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 fixture provides a broader light emitting angle, increased service life, and improved thermal and electrical efficiency, making it suitable for refrigerated environments and various lighting applications, including retail displays and architectural uses.
Implementation Method 1
an array of light emitting diodes (LEDs) mounted to the support members
Implementation Method 2
Current flows through the circuit board using a copper trace to illuminate the LED thereon
Data Source
AI summary
The invention provides an elongated lighting fixture with multiple light emitting diodes (LEDs) arrayed in two groups that are angled to each other. The fixture provides an extremely broad light emitting angle and includes an elongated housing having a pair of side walls. Each side wall has a support member extending upward at angle from the side wall, wherein the side walls terminate at a central wall. A generally transparent cover is connected to the housing and extends between opposed ends of the housing. A first group of LEDs and a second group of LEDs are mounted to the first support member and the second support member, respectively. PCB boards assemblies are affixed to respective support members beneath the group of LEDs by tension clips. When the PCBs are energized by a power source, current travels from the PCBs to each LED for illumination.