Lighting Device Moveable Auxiliary Reflectors Glare Reduction
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Solution Overview
Problem
Existing lighting devices lack flexibility in adjusting light output and distribution patterns, and often result in glare and inefficient secondary illumination due to fixed reflector configurations.
Innovation Solution
A lighting device with a reflector module comprising a main reflector and moveable auxiliary reflectors that adjust the light output aperture and distribution by exposing reflective surfaces to redirect light away from the primary target area towards a secondary target area, enhancing both primary and secondary illumination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If fixed reflector configurations are used, then the device structure is simple, but the light distribution flexibility is poor
Solution Approach 1:
The patent applies the dynamics principle by making the auxiliary reflectors moveable relative to the main reflector. The auxiliary reflectors can be positioned in different locations to change the light distribution pattern, transforming a static reflector system into a dynamic one that adapts to different lighting requirements while maintaining a relatively simple overall structure.
2Illumination intensity
If all light is directed towards the primary target area, then the primary illumination intensity is high, but glare increases and secondary illumination is insufficient
Solution Approach 1:
The patent segments the light distribution function by dividing the reflector system into a main reflector for primary illumination and multiple auxiliary reflectors for secondary illumination. This segmentation allows different portions of light to be directed to different target areas, reducing glare in the primary direction while providing supplemental lighting in secondary areas.
Solution Approach 2:
The patent applies local quality by positioning auxiliary reflectors at specific locations around the main reflector, where each auxiliary reflector is strategically placed to redirect light to specific secondary target areas. This localized approach ensures that secondary illumination is provided precisely where needed without compromising primary illumination quality.
3Adaptability or versatility
If the light output aperture is fixed, then the device structure is simple, but the ability to adjust light distribution patterns is limited
Solution Approach 1:
The patent implements dynamics by making the auxiliary reflectors moveable relative to the main reflector. This allows the light output aperture and distribution patterns to be adjusted by repositioning the auxiliary reflectors, providing adaptability without requiring a completely complex adjustable aperture mechanism.
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 allows for customizable light distribution and reduced glare by adjusting the light output aperture and redirecting excess light for improved secondary illumination, enhancing the overall lighting effect.
Implementation Method 1
a plurality of reflective surfaces adjacent to the opening for reflecting light incident thereon away from the opening and at an angle to the optical axis
Data Source
Figure 1
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Figure 4(a)
AI summary
A lighting device (10) includes a baffle (24) extending about an optical axis to surround a light source (12), and a reflector module (40) connected to the baffle. The reflector module includes a main reflector (44) having a light exit opening from which a light output of the lighting device is projected towards a target area, the optical axis passing through the opening, and a plurality of reflective surfaces adjacent to the opening for reflecting light incident thereon away from the opening. The reflector module further includes a plurality of auxiliary reflectors (60, 62) for adjusting the shape of the light output of the lighting device. Each auxiliary reflector has a reflective surface, and is moveable relative to the main reflector between a stowed position and a deployed position in which at least part of the reflective surface of the auxiliary reflector is exposed, by the opening of the main reflector, to reflect light incident thereon away from the target area.