Shielded Light Fixture Asymmetric Strut Design
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Solution Overview
Problem
Conventional light fixtures with directional light distribution struggle to efficiently direct light in a manner that maximizes illumination of specific areas while minimizing light emission in unwanted directions, such as upwards or perpendicular to the ground.
Innovation Solution
The design incorporates elongated struts with strategically positioned sockets that support light-emitting elements, allowing for asymmetric light distribution by varying the distance and angular offset of each light-emitting element from the strut axis, ensuring light is emitted at acute angles relative to the fixture axis, thereby directing light towards the ground and minimizing upward or perpendicular emission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If light-emitting elements are positioned symmetrically on struts, then the structure is simple and easy to manufacture, but the light distribution becomes symmetric and cannot effectively illuminate ground areas around poles
Solution Approach 1:
The patent applies asymmetry by positioning sockets at different distances from the second end of the strut (first distance vs. second distance where second > first), and offsetting the light-emitting planes of different light-emitting elements parallel to the axis. This asymmetric configuration directs light at different angles to achieve effective ground illumination around poles, resolving the contradiction between symmetric simplicity and asymmetric illumination effectiveness.
2Illumination intensity
If light-emitting elements emit light perpendicular to the fixture axis, then the light distribution is uniform, but upward emission is excessive and ground-level illumination is reduced
Solution Approach 1:
The patent applies local quality by directing different light-emitting elements to emit light in different directions tailored to their specific positions. Elements are configured to emit at angles away from the perpendicular direction, with asymmetric positioning ensuring that light is directed toward ground level rather than uniformly in all directions. This reduces upward light emission waste while maximizing ground-level illumination effectiveness.
3Illumination intensity
If multiple light-emitting elements are positioned at the same distance from the strut end, then the manufacturing process is simplified, but the light distribution pattern cannot be optimized for asymmetric illumination
Solution Approach 1:
The patent applies segmentation by dividing the strut into multiple sections with sockets positioned at different distances from the second end (first socket at first distance, second socket at second distance). This segmentation allows each light-emitting element to be independently positioned to achieve optimized asymmetric light distribution patterns, while each individual socket remains a simple component that can be manufactured and installed separately.
Data Source
AI summary
A light fixture includes at least one elongated strut and a socket formed on each strut. Each strut includes a first end, a second end, and an arcuate portion extending between the first end and the second end. An axis extends between the first end and the second end. The arcuate portion extending at least partially around the axis. The socket includes a ridge and a surface supporting a first light-emitting element. The surface is recessed relative to the ridge such that the light emitted by the light-emitting element is directed at an acute angle relative to the axis.