Rotatable Cover Screens for Glare-Free Task Lighting
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Solution Overview
Problem
Existing ceiling-mounted task lights cannot reliably avoid light reflections on screens and monitor walls due to fixed light distribution, limiting the ability to adjust the illuminated areas and glare-free lighting.
Innovation Solution
The task light features two concentric cover screens that can be rotated around the lamp axis to steplessly adjust the downward light emission over a large beam angle, allowing for asymmetric light distribution while ensuring that upward light emission remains unobstructed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the light distribution is fixed with downward-pointing LED spotlights, then the luminous intensity can be controlled, but the illuminated areas cannot be adjusted and light reflections on screens and glass surfaces cannot be avoided
Solution Approach 1:
The patent introduces rotatable cover screens that can dynamically change the light distribution pattern. The cover screens can be rotated to different positions to adjust the beam angle and direction of the LED spotlights, transforming a static lighting system into a dynamic one that can adapt to different work requirements and avoid reflections on screens and glass surfaces.
Solution Approach 2:
The lighting system is segmented into multiple independent LED spotlights, each with its own controllable cover screen. This allows individual adjustment of each light source's direction and beam angle, enabling precise control over illuminated areas and the ability to redirect light away from reflective surfaces.
2Adaptability or versatility
If cover screens are added to adjust light emission, then the beam angle can be changed, but the device complexity increases
Solution Approach 1:
The patent combines multiple cover screens into a concentric arrangement where they share a common rotation axis. This merging of components allows for compact integration and simplified control, as all cover screens can be rotated together or independently around the same axis, reducing the overall structural complexity compared to having separate adjustment mechanisms for each light source.
Solution Approach 2:
The cover screens serve multiple functions: they adjust the beam angle, control the direction of light emission, and can be rotated to different positions to create various lighting patterns. This multi-functionality reduces the need for additional separate components, thereby managing device complexity while achieving versatile light distribution control.
3Adaptability or versatility
If the cover screens are rotated to adjust downward light emission, then the illuminated area can be changed, but the upward light emission might be blocked
Solution Approach 1:
The cover screens are designed with segmented structures that allow selective blocking of light in different directions. The segmentation enables the cover screens to control downward light emission for workspace illumination while maintaining openings or pathways for upward light to reach the ceiling, thus preventing the trade-off between the two lighting directions.
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
This solution enables flexible and glare-free lighting by allowing the adjustment of illuminated areas and preventing reflections on screens and glass surfaces, enhancing the overall lighting experience.
Implementation Method 1
downwardly directed LED spotlights (8) are recessed... upwardly directed LED spotlights (7) are arranged
Implementation Method 2
two concentric cover screens that can be rotated around the lamp axis to steplessly adjust the downward light emission
Implementation Method 3
the workplace is illuminated both by light emitted directly downwards and indirectly by light reflected from the ceiling
Data Source
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AI summary
In order to create a workplace light with which light reflections on screens and on monitor walls or glass surfaces can be reliably avoided, the invention relates to a tubular housing having an inner core in the form of an extruded profile (20) open towards the top and the bottom. Downward-directed LED spotlights (8) are installed in a recessed manner in the interior of the extruded profile (20). Upward-directed LED spotlights (7) are also arranged in the extruded profile (20). The extruded profile (20) has two lateral legs (21, 22) which have cylindrical outer surfaces and are surrounded in the manner of a shell by two outer covering shades in the form of tubular segments (4, 5). The two tubular segments (4, 5) can be rotated concentrically about the axis of the light for continuous variation of the beam angle range of the downward-directed LED spotlights (8).