Luminaire Optical Element with Segmented LED Structures
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional LED lighting systems with point light sources often experience high contrasts and luminance levels outside glare limitation ranges, leading to discomfort for viewers, and existing solutions to mitigate this through additional luminance surfaces increase manufacturing costs.
Innovation Solution
A lamp assembly with a primary and secondary LED structure having different emission spectra and/or separately controllable power supplies, utilizing lateral light guides to decouple and distribute light for contrast reduction, allowing for precise adjustment of luminance areas to match physiological needs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If optical systems with high quality are used to precisely direct light, then light distribution precision is improved, but high contrasts and luminance levels occur outside glare limitation ranges causing viewer discomfort
Solution Approach 1:
The LED arrangement is segmented into a primary LED structure for directed illumination and a secondary LED structure for ambient luminance. This segmentation allows independent control of the illuminating luminous flux and the contrast-reducing luminance, enabling precise light distribution while maintaining comfortable viewing conditions by separating the functions of precision lighting and glare reduction.
Solution Approach 2:
Different regions of the lighting device are assigned different optical qualities: the primary LED structure provides high-intensity directed light for precise illumination, while the secondary LED structure provides diffuse ambient light for contrast reduction. This local differentiation of optical properties allows the system to achieve both precision and comfort simultaneously in different spatial zones.
2Object-affected harmful factors
If additional luminance surfaces are added to reduce contrast, then viewer comfort is improved, but manufacturing effort and costs increase
Solution Approach 1:
The patent merges the contrast-reducing luminance function with the existing LED light sources by adding a secondary LED structure that shares the same mounting substrate and optical housing as the primary structure. This integration eliminates the need for separate backlighting systems or additional manufacturing processes, reducing both manufacturing effort and costs while achieving contrast reduction.
Solution Approach 2:
The secondary LED structure serves multiple functions: it provides ambient luminance for contrast reduction, can be independently controlled for dimming or color temperature adjustment, and integrates with the existing optical system. This multi-functionality eliminates the need for separate contrast-reduction mechanisms, simplifying the overall device design and reducing manufacturing complexity.
3Adaptability or versatility
If multiple lamp areas are provided in one lamp, then lighting can be adjusted to physiological needs, but structural complexity increases
Solution Approach 1:
The primary and secondary LED structures are equipped with separately controllable power supplies, enabling dynamic adjustment of the ambient luminance relative to the directed illumination. This allows the lighting device to adapt to different physiological needs (e.g., circadian rhythm regulation) by independently controlling the intensity and color temperature of each LED structure, achieving versatility without complex mechanical reconfiguration.
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 provides a compact, cost-effective design that reduces contrast and adapts lighting to human physiology, enabling efficient use of high-energy sources like LEDs, with adjustable luminance areas that simulate day-night rhythms and reduce glare.
Implementation Method 1
The decoupling area can also be designed for conducting or guiding the light, in particular in the lateral direction
Implementation Method 2
optical systems can be designed which have a comparatively small, glare-free light exit surface due to the punctiform nature of the illuminant, for example provided using lenses, micro-grids or reflectors
Data Source
Figure 1
Figure 2a~2b
Figure 3
AI summary
The invention relates to a luminaire assembly comprising a one-piece optical element with laterally successive light guiding and light steering sections, a central section comprising a refractive structuring for light input and output coupling for providing a directed luminous flux, a lateral section with an output coupling area for emitting contrast-reducing fill light, and a light source arrangement aligned to the optical element and in the beam direction in front of the optical element, comprising a circuit board with a plurality of light sources.The assembly according to the invention is characterized in that the lateral section further comprises a light guide area and the optical coupling elements arranged laterally to this on a surface for coupling out the contrast-reducing brightening light laterally to the directed luminous flux, wherein the light source arrangement has a primary light source structure and a secondary light source structure, wherein light sources of the primary light source structure and light sources of the secondary light source structure have different emission spectra and/or separately controllable power supplies.