Pivotable Reflector Shells for Uniform Wall Illumination
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Solution Overview
Problem
Existing lighting devices for illuminating long aisles and shelf walls face challenges in achieving uniform and glare-free illumination due to varying ceiling heights, aisle widths, and shelf depths, as well as off-center installations, which complicates the direction of light beams and results in inadequate brilliance and visibility issues.
Innovation Solution
A lighting device with two pivotally mounted reflector shells that can be adjusted independently to align the indirect and direct light beams, allowing for flexible adaptation to different installation geometries without requiring movable lamp modules, ensuring efficient illumination of both floor and shelf surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single spotlight with fixed reflector is used, then the device complexity is low, but the adaptability to different installation geometries (ceiling heights, aisle widths, shelf depths) is poor
Solution Approach 1:
The reflector is divided into two independently adjustable reflector shells that can be tilted relative to each other and to the light source. This segmentation allows each shell to be optimized for different illumination tasks (one for wall illumination, one for floor illumination) while maintaining a relatively simple overall device structure.
Solution Approach 2:
The reflector shells are made dynamically adjustable through pivotal mounting, allowing them to be tilted to different angles during installation. This dynamic capability enables the same device to adapt to various ceiling heights, aisle widths, and shelf depths without requiring multiple fixed designs.
2Illumination intensity
If linear luminaire arrangements are used to illuminate long aisles, then the illumination covers a large area, but the brilliance and visibility of individual products is reduced due to diffuse lighting
Solution Approach 1:
The lighting function is segmented into two distinct beam directions: one focused beam for illuminating specific wall areas/products with high brilliance, and another broader beam for general aisle illumination. This segmentation allows simultaneous achievement of product brilliance and area coverage.
Solution Approach 2:
Different quality lighting is provided for different spatial zones: concentrated, high-intensity light for product display areas on walls, and more diffuse light for the aisle floor and general areas. Each reflector shell is optimized to provide appropriate local lighting quality.
3Use of energy by moving object
If point light sources with multiple individual reflectors are used, then the lighting efficiency is improved, but achieving uniform and glare-free illumination becomes more difficult
Solution Approach 1:
The illumination task is segmented into two functions handled by separate reflector shells: one shell focuses light onto wall surfaces for product illumination, while the other directs light onto the floor. This functional segmentation simplifies the optimization process for each reflector while maintaining high overall lighting efficiency.
Solution Approach 2:
Each reflector shell is optimized for its specific illumination target (wall or floor), allowing tailored optimization of light distribution patterns. The wall-illuminating shell prevents glare by directing light away from customer eye levels, while the floor-illuminating shell provides uniform ambient light.
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 high lighting efficiency and uniform illumination of both floor and shelf walls, being insensitive to different assembly situations, with a significant portion of the light emitted as direct light to illuminate the floor and indirect light to cover the shelf surfaces, reducing glare and enhancing visibility.
Implementation Method 1
at least one spotlight comprising a light source and a reflector for capturing and radiating the light emitted by the associated light source in the form of a beam of rays
Data Source
Figure 1a~6
Figure 2
Figure 3
AI summary
Lighting device for illuminating wall surfaces such as shelves or bookcases (6, 7), comprising at least one spotlight (2) which includes a light source (9) and a reflector (8) for capturing and emitting the light emitted by the associated light source (9) in the form of a beam (12, 13), characterized in that the reflector (8) has two reflector shells (10, 11) which are arranged on opposite sides with respect to the light source (9) and are pivotably mounted relative to the light source (9) and relative to each other about at least one tilting axis (14) which extends transversely to the main emission direction (22) of the light source (9) and parallel to a dividing plane (17) between the reflector shells (10, 11), wherein the reflector shells (10, 11) define a light emission opening (23) between them, through which the main emission axis (22) of the light source (9) extends, so that Light emitted from the light source (9) at the reflector cups (10,11) exits as an unreflected direct light beam (12).