Multi-Beam Lighting Device Glare Control

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Solution Overview

Problem

Existing lighting devices face challenges in maintaining optimal intensity distribution and minimizing glare across varying dim levels, leading to discomfort and uneven illumination, particularly in high-illuminance settings, which is exacerbated by the need for high light intensity for elderly users and the limitations of current dimmable systems that are not adaptable to different user needs.

Innovation Solution

A lighting device with at least two separately dimmable beams, where the dimming ratio between the high-glare and low-glare beams adjusts based on total light flux, ensuring a constant glare level by increasing the dimming rate of the low-glare beam more than the high-glare beam as overall light output increases, and incorporating sensors for real-time adjustments based on user activity, presence, and environmental conditions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Illumination intensity

If the light flux of a luminaire is increased to provide higher illumination levels, then the illumination intensity is improved, but the glare level increases

Engineering Contradiction:

Improveillumination levelVSAvoidglare level

Core Design Contradiction:

Illumination intensityVSObject-affected harmful factors

Solution Approach 1:

The luminaire is divided into multiple independent light sources (first light source, second light source, third light source) that can be controlled separately. Each light source contributes to different aspects of illumination, allowing the system to provide high total light flux while managing glare through selective control of individual sources.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different light sources are assigned different functions and characteristics. The first light source provides general illumination, the second light source provides supplementary illumination with different angular distribution, and the third light source provides accent lighting. This local differentiation allows optimization of both illumination intensity and glare control in different spatial zones.

Inventive Principle:

Principle #3Local quality

2Illumination intensity

If the light flux is increased to meet higher illumination requirements, then the illumination level is improved, but the discomfort glare increases

Engineering Contradiction:

Improveillumination levelVSAvoiddiscomfort glare

Core Design Contradiction:

Illumination intensityVSObject-affected harmful factors

Solution Approach 1:

The luminaire incorporates dynamic control capabilities with separate dimming control for each light source group. The controller can adjust the intensity of each light source independently based on ambient light conditions, time of day, and user preferences, allowing the system to adapt to changing requirements while maintaining optimal glare levels.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system changes operational parameters by controlling the dim levels of different light source groups separately. By adjusting the intensity parameters of individual light sources rather than all sources uniformly, the system can achieve high illumination levels while keeping glare within acceptable limits through selective parameter optimization.

Inventive Principle:

Principle #35Parameter changes

3Device complexity

If a single light source is used to provide high illumination, then the device complexity is reduced, but the adaptability to different user needs deteriorates

Engineering Contradiction:

Improvenumber of light sourcesVSAvoidadaptability to user needs

Core Design Contradiction:

Device complexityVSAdaptability or versatility

Solution Approach 1:

The luminaire is designed as a multi-functional lighting system that can serve different purposes simultaneously. The first light source group provides general task lighting, the second light source group provides supplementary lighting for areas requiring additional illumination, and the third light source group provides accent lighting. This multi-functionality allows a single luminaire to adapt to various user needs without requiring multiple separate fixtures.

Inventive Principle:

Principle #6Universality (Multi-functionality)

4Productivity

If the intensity distribution is optimized for high flux packages, then the illumination effectiveness is improved, but the glare rating increases

Engineering Contradiction:

Improveillumination effectivenessVSAvoidglare rating

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

Different light sources are assigned different functions and characteristics. The first light source provides general illumination, the second light source provides supplementary lighting with different angular distribution, and the third light source provides accent lighting. This local differentiation allows optimization of both illumination intensity and glare control in different spatial zones.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

Inventive Principle:

Principle #1Segmentation

Data Source

PatentEP2949184B1Lighting device and lighting system

Publication Date: 2018.07.25 SIGNIFY HOLDING BV

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Figure 2A~2B
Figure 3A

AI summary

A lighting device comprising a first light source issuing a first beam and a second light source issuing a second beam. Said first and said second light source are dimmable and together issue light with a total light flux. At a mutually equal light flux of the first and the second beam, the glare level of the second beam is lower than the glare level of the first beam. The lighting device further comprises at least one (programmed) controller which, during operation, moderates said dim levels such that in at least a range of the illumination level a ratio of the dim level of the second beam to the dim level of the first beam increases in a gradual manner with increasing total light flux.