Segmented Reflector Lamp for Uniform Rectangular Illumination
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Solution Overview
Problem
Existing reflector lamps struggle to achieve uniform illumination of rectangular areas due to overlapping light cones and unilluminated sections, leading to significant brightness differences, which is not optimal for applications like retail store lighting.
Innovation Solution
A reflector luminaire with radially aligned segments, each calculated to emit light to a defined position, forming a desired light distribution by varying widths, lengths, and curvatures, with narrow transition sections to minimize light loss, allowing for targeted lighting control and uniform illumination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional reflector lamps with paraboloid or ellipsoid surfaces are used, then light can be directed in specific patterns, but uniform illumination of rectangular areas cannot be achieved due to overlapping light cones and unilluminated sections
Solution Approach 1:
The reflector surface is divided into multiple radially arranged segments with different shapes, sizes, and curvatures. Each segment is independently designed to direct light to specific areas, allowing precise control of light distribution to achieve uniform illumination of rectangular areas without overlapping light cones
Solution Approach 2:
Different segments of the reflector are given different local properties including varying widths, lengths, and curvatures. Each segment is optimized for its specific position and function, with segments near the illuminant having different characteristics than those further away, enabling tailored light direction for uniform rectangular illumination
2Ease of operation
If the reflector is divided into segmented sections to control light distribution, then targeted lighting control is improved, but light loss increases due to transition sections between segments
Solution Approach 1:
The transition sections between segments are designed to be as narrow as possible, minimizing their area and thus minimizing light loss. By making the transition sections partial (narrow) rather than extensive, the harmful effect of light loss is reduced while maintaining the beneficial segmentation for lighting control
Solution Approach 2:
The parameters of the segments (width, length, curvature) are continuously varied and optimized to achieve the desired light distribution. By adjusting these parameters, the reflector can direct light precisely to target areas while minimizing waste in transition zones
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 illumination with minimal light loss, ensuring consistent brightness across the illuminated area by optimizing the shape and alignment of segments, reducing the effective area of transition sections and maintaining the desired light distribution.
Implementation Method 1
The coating can be formed by a metallic layer made of aluminum, silver, etc., or it can be produced as an interference layer reflecting the visible light. In the latter case, there is the advantage that invisible thermal radiation can be let through by the reflector, which creates a so-called cold light source.
Data Source
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AI summary
The reflector lamp comprises an illuminating unit and a reflector which reflects illumination of the illuminating unit for striking on the reflector in a beam direction. The reflector comprises multiple segments (7) that are connected with each other by a transition sections through which the reflecting surface of the segment, is reduced.