Luminaire Geometric Solid Uniform Light Distribution
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Solution Overview
Problem
Light emitting diodes (LEDs) are point sources of light, leading to glare and poor aesthetics in lighting applications, as there is no known luminaire that efficiently converts point source illumination into a light output distribution similar to fluorescent lamps, with even luminance across its surface and a form factor similar to fluorescent lamps.
Innovation Solution
A luminaire design that includes a substrate, a reflector with a diffusely reflective interior surface, and reflective panels to create a reflective cavity, where light emitting diodes emit light that is scattered and reflected, providing a uniform light distribution by passing through apertures and being reflected by the reflector into the environment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If point source LEDs are used for lighting, then energy efficiency is improved, but glare and poor aesthetics occur due to non-uniform light distribution
Solution Approach 1:
The luminaire divides the light distribution function into multiple segments: LEDs provide point source illumination, reflectors direct light into the geometric solid, and the geometric solid portions distribute light through their exterior surfaces. This segmentation allows each component to optimize its function while achieving overall uniform light distribution.
Solution Approach 2:
The geometric solid acts as an intermediary between the point source LEDs and the environment. It receives concentrated light from LEDs, processes it through its internal geometry and material properties, and outputs distributed light through its exterior surfaces, thereby converting point source illumination into area source illumination.
2Use of energy by moving object
If point source LEDs are used, then energy efficiency is improved, but the form factor and light output distribution cannot match fluorescent lamps
Solution Approach 1:
The invention transitions from point source illumination (0D/1D) to area source illumination (2D/3D) by using the geometric solid's exterior surfaces as light-emitting areas. This dimensional transformation allows LED point sources to achieve the extended form factor and light distribution characteristics traditionally associated with fluorescent lamps.
Solution Approach 2:
The geometric solid's material properties (transparency, refractive index) and geometric parameters (shape, size, surface area) are optimized to transform the light output characteristics. By adjusting these parameters, the luminaire achieves form factor and light distribution similar to fluorescent lamps while maintaining LED energy efficiency.
3Volume of moving object
If LEDs are used as point sources, then compact design is achieved, but unacceptable glare occurs due to concentrated light output
Solution Approach 1:
The invention extracts the light-generating function from a single point source and distributes it across multiple exterior surfaces of the geometric solid. By taking out the concentrated light output and redistributing it through the geometric solid's surfaces, glare is eliminated while maintaining compact LED-based design.
Solution Approach 2:
The geometric solid serves as a mediator that decouples the compact point source LEDs from their direct visual impact. It absorbs the concentrated light and re-emits it distributed across its exterior surfaces, thereby eliminating glare while preserving the compact form factor enabled by LED technology.
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 luminaire achieves a uniform light output distribution, reducing glare and improving aesthetics by effectively converting point source LEDs into a continuous light output similar to fluorescent lamps, enhancing energy efficiency and spatial uniformity of light.
Implementation Method 1
a reflector with a diffusely reflective interior surface, and reflective panels to create a reflective cavity, where light emitting diodes emit light that is scattered and reflected
Implementation Method 2
a geometric solid made of a transparent material including two geometric solid portions joined together side-by-side... light output distribution similar to fluorescent lamps
Data Source
AI summary
A luminaire. The luminaire includes a geometric solid. The geometric solid has a length and includes a first geometric solid portion which includes an optically clear material and a second geometric solid portion which includes the optically clear material, wherein the first and second geometric solid portions are conjoined. The luminaire further includes a cavity defined by the first and second geometric solid portions, a plurality of discrete light sources positioned to emit light into the cavity, a first aperture positioned to allow a first portion of light in the cavity to pass into the first geometric solid portion, and a second aperture positioned to allow a second portion of the light in the cavity to pass into the second geometric solid portion.