Individually Controllable Lighting Means for Glare Avoidance
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Solution Overview
Problem
Existing lighting technologies often result in glare, particularly in workplaces and public areas, where individuals are frequently exposed to light sources, leading to discomfort and reduced work performance, despite measures like directional lighting to minimize this issue.
Innovation Solution
A lighting arrangement with individually controllable light sources and person recognition means, such as cameras, that adjust light emission based on the line of sight of individuals to avoid glare by deactivating or dimming light sources directed towards observers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If light is emitted within certain angular ranges (directional lighting), then glare is reduced for observers, but the adaptability to different viewing directions is limited
Solution Approach 1:
The lighting system is divided into multiple individually controllable light sources (e.g., multiple LEDs arranged in different directions), allowing each segment to be independently controlled based on observer position and viewing direction, thereby reducing glare while maintaining adaptability
Solution Approach 2:
The lighting system dynamically adjusts the emission characteristics of individual light sources based on real-time detection of observer position and viewing direction, enabling the system to adapt to changing conditions and prevent glare while maintaining overall illumination
2Object-affected harmful factors
If light sources are permanently directed within certain angular ranges, then glare is avoided for fixed viewing positions, but the overall lighting coverage and uniformity are reduced
Solution Approach 1:
The lighting arrangement uses multiple light sources directed at different angles, where each source covers a specific area without causing glare, and collectively they provide comprehensive uniform illumination of the entire target area
Solution Approach 2:
Different light sources are optimized for different local areas with specific emission angles tailored to their respective coverage zones, ensuring each area receives appropriate illumination without glare while maintaining overall uniformity
3Adaptability or versatility
If multiple individually controllable light sources are used, then adaptability to avoid glare is improved, but the device complexity increases
Solution Approach 1:
A single control unit performs multiple functions: detecting observer position, determining viewing direction, selecting appropriate light sources, and controlling their emission characteristics, thereby managing complexity through functional integration
Solution Approach 2:
The system uses detection units to continuously monitor observer position and viewing direction, providing feedback to the control unit which adjusts light source emission accordingly, enabling automatic adaptation without complex manual control
Data Source
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AI summary
A lighting assembly (100) comprises a plurality of individually controllable lighting means (115) which are designed such that they emit light into different areas of a room or into different directions, person recognition means (120, 130) which are designed to recognize the face and the line of sight of individuals (501, 502, 503) present in an area that can be lit by the lighting means (115), and control means (140) which control the lighting means (115) on the basis of information made available by the person recognition means (120, 130).