UV LED Lamp Cover with Asymmetric Roughness for Surface Light
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Solution Overview
Problem
Conventional UV light lamps are inefficient due to high power consumption, heat emission, short lifespan, and environmental pollution, and existing UV LED lamps face challenges in converting point light sources to surface light sources while maintaining high transmittance and durability.
Innovation Solution
A UV LED lamp design featuring a cover made of transparent PMMA or quartz with roughened inner and outer surfaces, where the inner surface has a higher centerline average roughness than the outer surface, to increase refraction and diffusion of UV light, reducing reflection loss and enhancing transmittance without the need for complex structures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the inner surface and outer surface of the cover are both roughened to convert point light to surface light, then light diffusion and refraction are improved, but light reflection loss increases
Solution Approach 1:
The patent applies different roughness characteristics to different surfaces of the cover. The inner surface has a first roughness with specific parameters (Ra1, Rz1) optimized for light diffusion, while the outer surface has a second roughness with different parameters (Ra2, Rz2) optimized for reducing reflection. This local differentiation allows each surface to perform its specific function optimally without compromising the other.
Solution Approach 2:
The patent creates an asymmetric roughness structure where the inner and outer surfaces have intentionally different roughness characteristics. The inner surface roughness is designed to maximize light scattering and diffusion, while the outer surface roughness is designed to minimize reflection loss. This asymmetric design resolves the contradiction by making the two surfaces non-identical, allowing them to serve different optical functions.
2Productivity
If a complex structure is used to convert point light to surface light, then light conversion efficiency is improved, but device complexity increases
Solution Approach 1:
The patent merges the light conversion function directly into the cover structure itself. Instead of using separate components or complex assemblies to convert point light to surface light, the cover's dual-roughness structure performs both protection and light conversion functions simultaneously. This integration simplifies the overall device while maintaining high light conversion efficiency.
Solution Approach 2:
The cover structure serves itself by using its own dual-roughness surface to perform the light conversion function. The inner rough surface diffuses the light, and the outer rough surface further scatters it while reducing reflection, all without requiring additional components. This self-service approach eliminates the need for complex external light conversion mechanisms.
3Illumination intensity
If conventional UV lamps are used, then UV light emission is achieved, but power consumption and heat emission increase
Solution Approach 1:
The patent changes the fundamental operating parameters by switching from conventional UV lamp technology to UV LED technology. This parameter change enables UV light emission with significantly lower power consumption and reduced heat generation. The dual-roughness cover further optimizes this by maximizing light extraction efficiency, ensuring that more of the LED's output is converted to useful surface light rather than being lost to reflection or heat.
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 effectively converts point UV light into surface light, increasing UV transmittance and reducing light loss, thereby expanding the application range of UV LED lamps while simplifying the lamp structure and maintaining durability.
Implementation Method 1
the refraction and diffusion of UV light incident through the inner surface of the cover can be increased
Implementation Method 2
the refraction and diffusion of UV light incident through the inner surface of the cover can be increased
Implementation Method 3
the amount of reflection from the outer surface of the cover is smaller than the amount of reflection from the inner surface of the cover
Data Source
AI summary
The present disclosure relates to a UV LED lamp, and more particularly, to a UV LED lamp which converts UV LED light from a point light source into surface light using the simplest structure and emits the surface light. The UV LED lamp comprises: a UV LED chip; a PCB board having the UV LED chip mounted thereon; and a cover disposed at a distance from the UV LED chip and configured to convert point UV light, emitted from the UV LED chip, into surface light, the cover having an inner surface facing the UV LED chip and an outer surface opposite the inner surface, wherein the inner surface and outer surface of the cover are roughened, and the amount of total reflection from the roughened inner surface is greater than the amount of total reflection from the roughened outer surface.