Lighting Structure Cavity Optic Glare Reduction
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Solution Overview
Problem
Glare from lighting fixtures caused by significant differences in light intensity levels between various parts of the fixture leads to visual discomfort, particularly dependent on viewing angles.
Innovation Solution
A lighting structure design featuring a light emitting panel with a cavity section and a slanted wall optic, where the optic is positioned within the cavity, allowing light to enter a planar section and reducing contrast by directing some light through the opening, thereby minimizing glare without significantly reducing overall light output.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a light source is positioned in a lighting fixture, then light output is provided, but significant differences in intensity levels between areas close to the light source and background areas cause glare
Solution Approach 1:
The lighting fixture is segmented into distinct functional zones: a light well region that houses and directs light from the source, and a planar section that provides diffuse background illumination. This segmentation allows each zone to serve its specific purpose - the light well concentrates and directs light efficiently while the planar section distributes light evenly to reduce intensity contrasts that cause glare.
Solution Approach 2:
The light well acts as an intermediary structure between the light source and the surrounding environment. It mediates the light output by controlling its distribution pattern, directing light in specific directions while preventing excessive intensity in any single area, thereby reducing glare without compromising overall light output.
2Illumination intensity
If light intensity is increased near the light source to improve illumination, then overall brightness is enhanced, but the contrast with background areas increases causing visual discomfort
Solution Approach 1:
Different regions of the lighting fixture are designed with different optical properties. The light well region is optimized for light concentration and directionality, while the planar section is designed for diffuse reflection and even light distribution. This local differentiation allows high brightness where needed while maintaining visual comfort through controlled intensity transitions.
Solution Approach 2:
The planar section creates a background illumination field that provides a relatively uniform light level across the fixture surface. This equipotential lighting approach ensures that no single area dramatically outshines others, reducing the contrast that causes visual discomfort while maintaining overall brightness through the integrated light well design.
3Object-affected harmful factors
If the optic structure is made more complex to control light distribution, then glare is reduced, but device complexity increases
Solution Approach 1:
The complex light distribution control function is extracted from the main fixture body and concentrated in the dedicated light well structure. By separating the light directionality function into this distinct component, the rest of the fixture can maintain a simpler design while still achieving effective glare control through the light well's geometric design and light redirection capabilities.
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 design effectively reduces glare by minimizing the contrast between the optic and planar sections, resulting in improved visual comfort, especially at wider viewing angles where the optic is not directly visible, while maintaining the overall brightness of the lighting area.
Implementation Method 1
an optic 104 positioned within the cavity section 106. The optic 104 may be configured to redirect light received from the light source 202
Implementation Method 2
A portion of the light received by the planar section 110 from the optic 104 is emitted through the front surface 204 of the planar section 110
Data Source
AI summary
The present invention discloses a lighting structure (100) comprising a light emitting panel (102) with a planar section (110) and a cavity section (106). An optic (104) is disposed within a cavity (108) of the cavity section (106), wherein an opening (112) of the cavity section (106) is surrounded by the planar section (110), wherein the optic (104) is located distal from the opening (112) of the cavity section (106) to transfer a first portion of a light from a light source (202) toward the opening (112) of the cavity section (106) and a second portion of the light into the planar section (110).