LED Road Lighting with Inclined Side Modules
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Solution Overview
Problem
Conventional streetlight systems using LEDs face limitations in achieving large light distribution areas and high brightness, struggle with adjusting light distributions, and have issues with glare and heat dissipation, leading to ineffective road illumination and safety concerns.
Innovation Solution
A lighting apparatus with a circular upper plate and inclined side portion, featuring first and second LED modules mounted on the lower and inner surfaces respectively, allowing for adjustable mounting angles and heat dissipation, which enables flexible light distribution and cut-off angles to prevent glare.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If light emitting diode modules are mounted only on the lower surface of the upper plate, then the structure is simple, but the light distribution area is small and brightness is low
Solution Approach 1:
The patent transitions from mounting LED modules only on the lower surface (2D plane) to mounting them on both the lower surface and the inner surface of the side portion (3D spatial utilization). This dimensional expansion increases the light distribution area and brightness without significantly complicating the overall structure.
Solution Approach 2:
The patent divides the LED module mounting locations into two distinct segments: the lower surface of the upper plate and the inner surface of the side portion. This segmentation allows each area to contribute to light distribution independently, achieving a larger overall light distribution area while maintaining structural simplicity.
2Manufacturing precision
If the reflection angle of the reflecting plate is fixed during manufacture, then the manufacturing precision is high, but the adaptability to different light distribution requirements is poor
Solution Approach 1:
The patent makes the reflection angle dynamic and adjustable after manufacture, allowing the reflecting plate's angle to be changed based on different light distribution requirements. This resolves the contradiction by enabling both precise manufacturing (fixed during production) and adaptability (adjustable during use).
Solution Approach 2:
The patent employs a curved reflecting plate surface that can be adjusted to different angular positions. The curved geometry allows for precise light reflection control while providing the flexibility to adapt to various light distribution patterns through angular adjustment.
3Ease of operation
If light emitting diode modules are mounted without considering cut-off angle, then the ease of operation is high, but glare occurs that hinders pedestrian or driver safety
Solution Approach 1:
The patent pre-configures the mounting structure of LED modules to automatically ensure the cut-off angle is maintained. The design includes built-in geometric constraints or positioning features that guide correct installation, making it easy to operate while preventing glare by ensuring proper angular orientation from the start.
Solution Approach 2:
The patent introduces an intermediary element (such as a mounting bracket or positioning structure) between the LED modules and the housing that ensures the cut-off angle is maintained. This intermediary component simplifies installation while enforcing the safety angle requirement, preventing direct line-of-sight to the light source.
4Device complexity
If heat dissipation is not effectively managed, then the device complexity is low, but the emission efficiency decreases and parts are damaged
Solution Approach 1:
The patent implements a self-service heat dissipation system where the LED module mounting structure itself serves as a heat dissipation pathway. The mounting bracket or housing structure is designed to conduct heat away from the LED modules without requiring separate active cooling components, maintaining low device complexity while ensuring reliable heat management.
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
This design achieves a large light distribution area and high brightness, allowing for various light distribution types, improved flexibility in road lighting, and enhanced safety by reducing glare and extending LED lifespan through effective heat management.
Implementation Method 1
first light emitting diode modules 20 to illuminate the road, and second light emitting diode modules 30 to illuminate the road
Implementation Method 2
when light distribution is formed by the reflecting plate
Data Source
Figure 1(a)~3
Figure 4~7
Figure 8~11
AI summary
The invention includes a lamp housing member having a circular upper plate and a side portion formed at the outer circumference of the upper plate, first light emitting diode modules that are provided on a lower surface of the upper plate and are supplied with power to emit light, and second light emitting diode modules that are mounted on the inner surface of the side portion and are supplied with power to emit light. According to the invention, it is possible to increase a light distribution area, achieve illumination with high brightness, and improve flexibility in the road lighting design. In addition, it is possible to easily ensure a cut-off-angle at which pedestrians or drivers cannot directly view the second light emitting diode modules by adjusting the inclination angle of the side portion.