Asymmetric Reflector Facets for Uniform Light Distribution
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Solution Overview
Problem
Existing reflectors with multiple reflecting bodies produce unsmooth light patterns due to consistent internal facet angles, leading to light loss when using diffusive covers or reduced reflectivity through surface roughening.
Innovation Solution
Arranging reflecting bodies with internal facets to rotate by specific angle differences around their axes in a clockwise or anticlockwise direction to compensate for unsmooth light distribution, eliminating the need for additional parts and maintaining high reflectivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a diffusive cover is used to cover the surface of the reflector, then the light can be well mixed, but a lot of light is lost in the cover
Solution Approach 1:
The patent removes the diffusive cover from the system entirely. Instead of using a separate cover component to mix light, the invention integrates the light mixing function directly into the reflector structure through asymmetric facet design, thereby eliminating the light loss associated with the cover while maintaining uniform light distribution.
Solution Approach 2:
The patent combines the light mixing function with the reflector structure itself. The asymmetric facets of the reflecting bodies perform both reflection and light mixing functions simultaneously, eliminating the need for a separate diffusive cover and preventing light loss in the cover.
2Stability of the object's composition
If the peripheral surface of the reflecting body is made rough by sand blasting, then the light can be well mixed, but the reflectivity is much lower than that of the reflecting body with a smooth surface
Solution Approach 1:
The patent employs asymmetric facet design in the reflecting bodies. Each reflecting body has facets with different orientations and angles, creating an asymmetric structure that naturally mixes light without requiring surface roughening. This maintains smooth surfaces with high reflectivity while achieving uniform light distribution through the asymmetric geometry.
Solution Approach 2:
The patent applies different facet orientations and angles to different regions of the reflecting bodies. Each local area has specifically designed facet characteristics that contribute to overall light mixing, allowing the smooth surface to maintain high reflectivity while the varied local facet qualities achieve uniform light distribution.
3Device complexity
If reflecting bodies with the same internal reflecting facets are mounted in a consistent direction, then the structure is simple, but the light pattern obtained is not a smooth circular ring
Solution Approach 1:
The patent designs reflecting bodies with asymmetric facet configurations and mounts them in a consistent direction. The asymmetry is built into the individual reflecting body structure rather than requiring complex varied mounting orientations. This simple consistent mounting arrangement produces smooth circular light patterns because each asymmetric reflecting body is optimized to work in this specific orientation.
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
Achieves smooth light distribution with high optical efficiency and no luminous energy loss, reducing costs by integrating the solution within the reflector design.
Implementation Method 1
the reflector uses its own reflecting facets to mix the light
Data Source
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AI summary
The present invention relates a reflector (11) for a lighting device, comprising: a plurality of reflecting bodies (1) each having a plurality of internal reflecting facets (4). In such reflector (11), the plurality of reflecting bodies (1) are arranged to rotate by different rotation angels around their respective rotation axes, so as to be capable of compensating the unsmooth light distribution caused by the internal reflecting facets. In addition, the present invention relates to a lighting device having such reflector (11). The reflector (11) and the lighting device according to the present invention are capable of providing smoother light distribution with high optical efficiency, do not need any other optical parts to mix the light, and have the advantage of low cost.