Elliptic Lens LED Optics for Glare Control in Compact Lighting
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Solution Overview
Problem
Existing LED lighting devices for work environments are bulky, complex, and compromise optical performance to meet glare and efficiency requirements, failing to provide high visual comfort.
Innovation Solution
An LED lighting device with a compact design featuring a transparent lens having a concave elliptic inlet surface and convex elliptic outlet surface, aligned along a central axis, refracting light with minimal loss and avoiding glare through a shield, achieving high optical performance and visual comfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If LED lighting devices use complex lens structures and shields to meet glare requirements, then visual comfort is improved, but device compactness and optical performance deteriorate
Solution Approach 1:
The patent employs a lens with a spherical outer surface and an aspheric inner surface, utilizing curved geometries to control light distribution. The aspheric shape of the inner surface specifically directs light away from the observer's eye level, reducing glare while maintaining a compact device structure and high optical efficiency.
2Manufacturing precision
If LED lighting devices increase lens size to improve optical performance, then light emission quality is improved, but device compactness deteriorates
Solution Approach 1:
The patent integrates the shield structure within the lens assembly, positioning the shield's light-blocking surface inside the lens housing. This nested configuration allows the device to achieve high optical performance and glare control without increasing the external dimensions of the lighting device, maintaining compactness while improving optical efficiency.
3Object-affected harmful factors
If LED lighting devices use materials with high light absorption to control glare, then visual comfort is improved, but optical efficiency deteriorates
Solution Approach 1:
The patent extracts the glare control function from light-absorbing materials and implements it through geometric light redirection. By using the aspheric inner surface of the lens to redirect light away from the observer's eye level, the device achieves glare control without relying on light-absorbing materials, thereby maintaining high optical efficiency above 80%.
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 device achieves optical performance above 80% while complying with glare regulations, ensuring high efficiency and visual comfort with minimal material absorption and reflection.
Implementation Method 1
a lens (4) made of transparent material, having a concave inlet surface (11) facing the source (3) and a convex outlet surface (12), aligned along a central axis (A), refracting light with minimal loss
Data Source
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AI summary
An LED lighting device (1), extending along and about a central longitudinal axis (A), comprises at least one LED light source (3) and a lens (4) made of a transparent material, positioned along the axis (A); the lens (4) having a concave inlet surface (11), facing the source (3), and a convex outlet surface (12), substantially aligned along the axis (A) and extending about the axis (A); the inlet surface (11) and the outlet surface (12) have respective elliptic profiles, being defined by respective revolution surfaces generated by the rotation about the axis (A) of respective ellipse portions belonging to a first and a second generatrix ellipses (E1, E2) respectively.