LED Lens Deflects Light Downward to Reduce Glare
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Solution Overview
Problem
Conventional streetlights installed at high positions with pillars and arms are costly to install and do not efficiently direct light laterally across roads, leading to issues like driver glare and light loss.
Innovation Solution
An LED lighting module with LEDs arranged in a line on a substrate and an LED lens that deflects light downward, featuring a convex accommodation groove and reflective surfaces to emit light uniformly across the road, reducing installation costs and minimizing glare.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional streetlights are installed at high positions with pillars and arms, then light can be emitted downward toward the road, but installation costs increase significantly
Solution Approach 1:
The patent inverts the conventional streetlight configuration by installing lights at low positions on the road surface rather than high positions on pillars. The LED modules are embedded in the road, emitting light upward and laterally to illuminate the road, eliminating the need for expensive pillars and arms while achieving effective road illumination
2Ease of manufacture
If LEDs are arranged to emit light laterally across the road, then installation cost is reduced, but light distribution uniformity deteriorates
Solution Approach 1:
The patent applies local quality by designing different regions of the LED module with different functions: LEDs at the edges emit light laterally to illuminate the road width, while central LEDs emit light upward to provide overall illumination. The housing includes reflective surfaces positioned at specific locations to redirect light and ensure uniform distribution across the road, addressing the uniformity issue while maintaining low-cost lateral emission configuration
3Ease of manufacture
If light is emitted laterally across the road, then installation height is reduced, but driver glare increases
Solution Approach 1:
The patent uses local quality by directing light from different LED positions in different directions: edge LEDs emit light laterally along the road to illuminate the roadway, while central LEDs emit light upward at angles that avoid driver视线. The housing structure includes shields and reflective surfaces that control light direction locally, preventing glare to drivers while maintaining low installation height
Solution Approach 2:
The patent converts the potential harm of lateral light emission causing glare into a benefit by using reflective surfaces and shields within the housing to redirect light away from driver视线. The low-positioned LEDs that would normally cause glare are instead configured to emit light upward and laterally in controlled patterns that illuminate the road without disturbing drivers
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 LED lighting module allows for cost-effective installation at low heights, emits light uniformly in a lateral direction, and prevents driver glare by deflecting light downward, minimizing light loss and improving road illumination.
Implementation Method 1
the central axis of the LED lens is configured to be deflected by a predetermined distance in a downward direction compared with an optical axis to deflect and emit light emitted from the LED accommodated in the accommodation groove in a downward direction
Implementation Method 2
a pair of first reflective surfaces that are symmetrical with each other at opposite sides in the z-axis direction based on the accommodation groove to configure lateral surfaces in the z-axis direction of the LED lens and reflects light emitted in the z-axis direction of light emitted from the LED accommodated in the accommodation groove toward the light emitting surface
Data Source
AI summary
The present invention relates to an LED lighting module for a low street light, installed at a low height on the periphery of a road or a median strip, to illuminate light in a direction crossing the road, and to an LED lens provided on the LED lighting module. When using the LED lighting module for the low streetlight and the LED lens, according to one embodiment of the present invention, streetlight can be installed at a low height thereby reducing the cost for streetlight installation, glare on a car driver can be prevented by evenly lighting the road in the horizontal direction while deflecting downward, and the loss of light can be minimized.