Wall Washing Lamp With Angled Diffuser And Reflectors
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Solution Overview
Problem
Conventional light fixtures using point light sources often result in non-uniform illumination, bright spots, hyperbolic shadowing, uneven color temperature, and glare when attempting to provide broad and uniform surface illumination, such as in light washing applications.
Innovation Solution
The design incorporates a light source angularly disposed relative to an aperture and a diffuser, with reflectors positioned between the light source and diffuser, and between the diffuser and aperture, to achieve uniform light washing. This configuration includes a lower and upper housing with non-parallel mounting surfaces and a diffuser that is angled to ensure the light mount is at a specific non-parallel angle relative to the aperture, along with reflectors to direct and diffuse light effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If point light sources are used for broad surface illumination, then illumination coverage is achieved, but uniformity of illumination deteriorates (bright spots, hyperbolic shadowing, uneven color temperature)
Solution Approach 1:
The patent divides a single point light source into multiple separate light sources arranged in an array. Each light source emits light that, when combined with the others, creates a uniform distributed illumination pattern across the target surface, eliminating the bright spot and shadowing problems associated with single point sources.
Solution Approach 2:
The patent employs individual optical elements (lenses or reflectors) for each light source in the array, allowing each element to be optimized for its specific position and contribution to the overall illumination pattern. This enables precise control over the light distribution from each local source to achieve global uniformity.
2Ease of operation
If point light sources are used for surface illumination, then light directionality is achieved, but glare and shadowing worsen
Solution Approach 1:
The patent introduces optical intermediaries (lenses or reflectors) between each light source and the target surface. These intermediaries modify the direct light paths, scattering and redistributing the light to reduce glare and eliminate hyperbolic shadowing while maintaining directional control through the geometric arrangement of the array.
3Device complexity
If conventional light fixtures are used, then simple structure is maintained, but illumination uniformity deteriorates
Solution Approach 1:
The patent resolves the contradiction by segmenting the light source into multiple units arranged in a systematic array pattern. This segmentation approach achieves uniform illumination through the collective effect of multiple sources while maintaining relatively simple individual component designs and a systematic overall structure that is manufacturable and installable.
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 provides uniform light washing by minimizing glare and ensuring even illumination across surfaces, reducing bright spots and shadowing, and enhancing the distribution of light for a more uniform and aesthetically pleasing effect.
Implementation Method 1
a diffuser configured to be disposed between the first mounting surface and the second mounting surface
Implementation Method 2
one or more reflector(s) disposed between the light source and the diffuser and/or between the diffuser and the aperture
Data Source
AI summary
This disclosure includes light fixtures, some of which include a lower housing that defines a first channel and has first and second ends, where the first end defines an aperture and the second end has a first mounting surface disposed at a non-parallel first angle relative to a plane of the aperture, an upper housing that defines a second channel and has first and second ends, where the second end has a light mount and the first end has a second mounting surface disposed at a non-parallel second angle relative to a plane of the light mount, and a diffuser configured to be coupled between housings, where the upper and lower housings can be coupled at the first and second mounting surfaces such that the light mount is disposed at a non-parallel third angle relative to the plane of the aperture. Some light fixtures have unitary lower and upper housings.