Lantern Street Light Unit with Lateral Deflector
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Solution Overview
Problem
Modern LED light sources in lantern-shaped street lights alter the appearance of the lantern due to their different radiation characteristics, making it difficult to maintain the classic look while providing effective illumination.
Innovation Solution
A light unit with a diffusely reflective, concavely curved reflector tube that deflects a small portion of light sideways, combined with a light module carrier that emits most light directly for targeted illumination, maintaining the classic appearance and enhancing visibility in the dark.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If modern LED light sources are used in lantern-shaped street lights, then energy efficiency is improved, but the classic appearance and visibility of the lantern in the dark deteriorates
Solution Approach 1:
The light distribution is segmented into two functional paths: a primary directed beam for energy-efficient illumination and a secondary scattered component for maintaining classic lantern appearance. The scatter element disperses a portion of the LED light radially in all directions, creating the traditional omnidirectional glow pattern while the majority of light continues forward for efficient street illumination.
Solution Approach 2:
A scatter element is introduced as an intermediary component between the LED light source and the environment. This element mediates the light distribution by selectively scattering a portion of the light radially while allowing the remainder to proceed in the original direction, thus reconciling the conflicting requirements of modern efficiency and classic appearance.
2Illumination intensity
If light modules are aligned to illuminate traffic routes in a targeted manner, then illumination effectiveness is improved, but the lantern appearance becomes imperceptible in the dark
Solution Approach 1:
The illumination function is segmented into two components: a directed illumination path that maintains high effectiveness for traffic routes, and a scattered light path that restores the classic lantern appearance. The scatter element creates radial light distribution in all directions, making the lantern visible and recognizable in the dark while the primary beam continues to provide effective street lighting.
Solution Approach 2:
Instead of scattering all light (which would reduce illumination effectiveness), only a controlled portion of the light is scattered radially. This partial action maintains the primary illumination function while adding the necessary scattered component to restore the classic lantern appearance and visibility in the dark.
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 allows for the use of modern LED light sources while maintaining the classic appearance of lantern-shaped street lights, ensuring that the light is visible in the dark and effectively illuminates traffic areas without the need for additional heat sinks, thus improving energy efficiency and aesthetic retention.
Implementation Method 1
the reflector surface is designed to be diffusely reflective. The reflector surface can, in particular, be matt white. This type of reflector surface supports the effect that part of the light from the light modules is emitted evenly in all directions
Implementation Method 2
the reflector tube is concavely curved in a cross section along the longitudinal extent of the reflector tube, at least along a section. The concave curvature has the effect that the part of the light that is reflected on the reflector surface is deflected laterally horizontally and diagonally upwards
Data Source
Figure 1~2
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Figure 6~7
AI summary
The invention relates to a lighting unit for a lantern-shaped lamp for mounting at one end of a mast-shaped lamp support, comprising: a longitudinally extending reflector tube (2), which is designed as a reflector surface (4) on an outer circumferential surface, a lighting module carrier (10) which is arranged at one end of the reflector tube (2), wherein the lighting module carrier (10) has receptacles for at least one lighting module with light sources, and the lighting module carrier (10) projects out over the maximum circumference of the reflector tube (2) in at least one cross-sectional plane perpendicular to the longitudinal extent of the reflector tube (2), so that light from the light sources of the at least one lighting module only partially strikes the reflector surface (4) and is deflected laterally, and the other part leaves the lighting unit without reflection at the reflector surface (4).