Linear Luminaire Open Enclosure with Vertical PCB
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Solution Overview
Problem
Conventional linear luminaires face challenges in achieving uniform light emission and efficient space utilization due to structural limitations, such as blocking light with engaging structures and requiring complex assembly processes.
Innovation Solution
A linear luminaire design featuring a thin, elongate, and rigid printed circuit board (PCB) within an open enclosure with a light-transmissive top and opaque sidewalls, allowing for close placement to the emitting surface and minimal shadowing, along with innovative endcap and mounting clip structures for secure installation without adhesives or fasteners, and optional light modification using reflective or refractive facets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional channels with engaging structures are used, then mounting and assembly are facilitated, but light emission is blocked and uniformity is reduced
Solution Approach 1:
The patent removes traditional engaging structures from the channel that block light emission. The channel is designed with an open front face without obstructions, allowing unimpeded light output while maintaining simplified mounting capabilities through the open enclosure design.
Solution Approach 2:
The channel is designed with differentiated regions: the front face is completely open for optimal light emission, while the rear portion provides mounting functionality. This local differentiation allows light to pass unobstructed from the LED section while maintaining assembly capabilities at the rear.
2Volume of moving object
If PCB is placed closer to emitting surface, then space utilization is improved, but shadowing and light uniformity deteriorate
Solution Approach 1:
The patent positions the PCB vertically within the channel rather than horizontally, allowing the board to extend from the rear toward the front face. This vertical arrangement enables the PCB to be placed close to the emitting surface while the LED section remains elevated, preventing shadowing and maintaining light uniformity.
Solution Approach 2:
The channel interior is segmented into distinct functional zones: a lower region for the PCB carrying auxiliary components, and an upper region for the LED light engines. This vertical segmentation allows close PCB placement for space efficiency while keeping LEDs elevated for optimal light emission without shadowing.
3Quantity of substance
If connectors are arranged side-by-side, then connection density is improved, but PCB width increases
Solution Approach 1:
The patent transitions from a horizontal side-by-side connector arrangement to a vertical stacked arrangement along the PCB edge. This repositioning in the vertical dimension allows multiple connectors to be densely packed without increasing PCB width, enabling high connector density within the constrained channel space.
4Reliability
If adhesive or fastener is used for endcap installation, then secure mounting is achieved, but assembly complexity and material usage increase
Solution Approach 1:
The patent replaces chemical bonding (adhesive) or mechanical fastening (screws) with a pure mechanical interference fit system. The endcap includes an outwardly extending flange that engages with a corresponding ledge on the channel, creating a secure mounting through geometric interlocking alone, eliminating the need for adhesives or fasteners.
Solution Approach 2:
The endcap's flange structure automatically engages with the channel's ledge upon insertion, providing self-aligning and self-securing functionality. The design is self-sufficient, requiring no additional mounting materials or tools, and the engagement is inherent to the geometric configuration of the components.
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 design enables uniform, unbroken light emission to lateral edges with reduced space requirements, simplified assembly, and enhanced light control through refraction and reflection, suitable for narrow installations and efficient use in grooves or inlays.
Implementation Method 1
an open enclosure, at least a portion of which is light-transmissive
Implementation Method 2
a pair of sidewalls... the plastic used for the pair of sidewalls may have opaque additives
Implementation Method 3
optional light modification using reflective or refractive facets
Implementation Method 4
optional light modification using reflective or refractive facets
Data Source
AI summary
A linear luminaire includes a three-sided enclosure with a top that is at least translucent and a pair of depending sidewalls spaced apart by the top. The three-sided enclosure may be extruded from a plastic or, in some cases, co-extruded with two different materials so that the pair of sidewalls can be made of an opaque material. The three-sided enclosure may be open along a bottom aspect. An elongate rigid printed circuit board (PCB) carrying LED light engines is installed between the pair of sidewalls in slot structure defined on respective inner faces. The PCB may carry connecting structure staggered along the length of its underside. The PCB may also carry circuit components on its underside.