Lighting system
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Solution Overview
Problem
LED lighting systems in refrigerators face issues with glare and insufficient illumination due to the convergent effect of plano-convex lenses, which require anti-dazzle light covers that block part of the light, reducing overall lighting efficiency.
Innovation Solution
A microarray lens with an asymmetric Fresnel design is used, featuring strips with varying curvatures and orientations, allowing the light source to be positioned further from the anti-dazzle light cover, thereby reducing light obstruction and enhancing illumination efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a plano-convex lens is used to achieve good lighting, then illumination quality is improved, but the lens produces glare and requires an anti-dazzle light cover that blocks part of the light
Solution Approach 1:
The patent divides the lens into multiple sections: a plano-convex lens for illumination and a separate anti-dazzle light cover with light-transmitting holes for glare control. This segmentation allows each component to perform its specific function independently, resolving the contradiction between achieving good lighting and preventing glare.
Solution Approach 2:
The anti-dazzle light cover acts as an intermediary component between the plano-convex lens and the illuminated space. It selectively transmits light through its light-transmitting holes while blocking excessive brightness, thereby mediating between the need for illumination and the need to prevent glare.
2Object-generated harmful factors
If an anti-dazzle light cover is added to reduce glare, then glare is controlled, but the light cover blocks part of the light and reduces overall lighting efficiency
Solution Approach 1:
The anti-dazzle light cover is designed with light-transmitting holes at specific locations rather than being completely opaque. This local quality approach allows light to pass through designated areas while blocking excessive brightness in other areas, thereby controlling glare without completely blocking the light path and maintaining lighting efficiency.
3Stability of the object's composition
If the convex sphere of the plano-convex lens is positioned close to the anti-dazzle light cover to meet uniform illumination requirements, then illumination uniformity is improved, but the distance between lens and cover becomes very short causing light blockage
Solution Approach 1:
The patent resolves the spatial constraint by transitioning from a two-dimensional planar arrangement to a three-dimensional configuration. The anti-dazzle light cover is positioned above the plano-convex lens at a certain vertical distance, creating a three-dimensional light transmission path. This dimensional change allows light to diverge after passing through the lens before reaching the cover, reducing blockage while maintaining illumination uniformity.
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 microarray lens design increases the distance between the lens and the anti-dazzle light cover, minimizing light blockage and improving overall lighting efficiency while maintaining glare reduction, resulting in more effective and uniform illumination.
Implementation Method 1
The microarray lens is an asymmetric Fresnel lens... When the LED light is emitted from the lens, part of the light will be blocked by the anti-dazzle light cover
Implementation Method 2
The microarray lens is an asymmetric Fresnel lens... the surface of the light outgoing side of the microarray lens is provided with several strips with different structures
Data Source
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AI summary
The invention relates to a lighting system, which comprises a light source at the light incoming side of microarray lens and anti-dazzle light cover above the front end of the light outgoing side of the microarray lens. The microarray lens is an asymmetric Fresnel lens. By using the asymmetric Fresnel lens to replace the former piano convex lens, the thickness of Fresnel lens can be used to increase the distance between the lens and anti-dazzle light cover, so as to reduce the light blocked by anti-dazzle light cover and improve the light efficiency.