LED Lighting Device Optical Lens Reflector Glare Reduction
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Solution Overview
Problem
Current LED downlights suffer from low luminous efficiency, high glare, and large size due to their direct-lit or edge-lit structures, making them costly and unsuitable for large-scale applications.
Innovation Solution
An LED lighting device with a housing, a light source component, an optical lens, a reflector, and a surface ring, where the light source component includes a base plate with LED particles, and the optical lens and reflector work together to distribute and reflect light efficiently without a diffusing plate, enhancing luminous efficiency and reducing glare.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a direct-lit structure with one-staged reflector or multi-staged reflectors is used, then the lighting device can be manufactured with simpler structure, but the luminous efficiency is low and glare is high
Solution Approach 1:
The patent divides the optical system into multiple functional stages: a first reflector for initial light reflection, a light guide plate for light redistribution, and a second reflector for final light direction control. This segmentation allows each component to perform its specific function optimally, improving overall luminous efficiency while maintaining manufacturing feasibility
Solution Approach 2:
The light guide plate acts as an intermediary element between the LED light source and the final optical output. It receives light from the first reflector, redistributes it uniformly, and directs it to the second reflector, thereby mediating the light path to reduce glare and improve luminous efficiency without requiring complex direct-lit structures
2Loss of energy
If edge-lit attached structure with light guide plate is used, then luminous efficiency can be improved, but the device size becomes large and cost increases
Solution Approach 1:
The patent merges the light guide plate with the reflector structures to form an integrated optical system. The light guide plate is positioned between the first and second reflectors, combining light guidance and reflection functions in a compact arrangement that reduces overall device size while maintaining high luminous efficiency
Solution Approach 2:
The patent transitions from traditional edge-lit two-dimensional light guide structures to a three-dimensional integrated optical system where the light guide plate interacts with multiple reflectors in vertical and horizontal dimensions. This dimensional expansion allows for more efficient light utilization in a compact volume
3Object-affected harmful factors
If diffusing plate is added to homogenize light, then glare is reduced, but luminous efficiency decreases due to light absorption
Solution Approach 1:
The patent removes the diffusing plate from the optical system entirely, extracting the harmful light-absorbing element. Instead, it uses a combination of reflectors and light guide plate that homogenize light through reflection and redistribution without absorption, thereby eliminating glare while preserving luminous efficiency
Solution Approach 2:
The patent substitutes the diffusing plate's light homogenization function with a mechanical optical system consisting of reflectors and light guide plate. This system uses reflection and light redirection mechanisms instead of diffuse absorption to achieve uniform light distribution without energy loss
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 achieves uniform lighting with no glare, improving luminous efficiency and reducing costs by eliminating the need for a diffusing plate, thus providing a more effective and affordable LED lighting solution.
Implementation Method 1
an optical lens located above the light source component and configured to distribute light for the light source component
Implementation Method 2
a reflector in contact with the optical lens... light of the LED light source particles sequentially passes through the optical lens and the reflector and then emits through the light exit
Data Source
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AI summary
The present invention discloses a LED lighting device including a housing, a light source component, an optical lens located above the light source component and configured to distribute light for the light source component, a reflector in contact with the optical lens, and a surface ring assembled on the reflector; the housing, the light source component, the optical lens, the reflector, and the surface ring are sequentially arranged; the surface ring is fixed on the housing to delimit a receiving chamber, the light source component, the optical lens, the reflector are all located in the receiving chamber; the LED lighting device has a light exit; the light source component includes a light source base plate and LED light source particles located on the light source base plate; light of the LED light source particles sequentially passes through the optical lens and the reflector, and then emits through the light exit. The LED lighting device provided by the present invention does not need a diffusion plate to homogenize light, increases the luminous efficiency and at the same time prevents from glare, so as to achieve a good lighting effect.