Single Edge Lit Optical Assembly for Linear Lighting
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing edge lit light fixtures struggle to achieve uniform lighting with controlled light distribution, particularly in non-normal orientations, and require multiple light sources, which increases complexity and cost.
Innovation Solution
A single edge lit lighting module that produces tailored light distributions, including symmetric and asymmetric batwing distributions, using a unique construction that eliminates the need for conventional two-lit edges, allowing for compact form factors and dynamic light output adjustments through LED board signal control, along with an optional light transmitting component for further modification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional two-lit edge constructions are used to achieve controlled light distribution, then light distribution control is improved, but device complexity and cost increase
Solution Approach 1:
The patent extracts the light input function from one of the two edges, using only a single edge for light input while achieving the desired light distribution patterns through optical design of the light guide and surface features
Solution Approach 2:
The single light guide structure serves multiple functions: it transports light from the single input edge, controls light distribution through internal optical features, and can produce various light patterns (symmetric batwing, asymmetric batwing, linear) depending on the surface feature configuration
2Illumination intensity
If conventional two-lit edge constructions are used to achieve uniform lighting, then lighting uniformity is improved, but the form factor becomes less compact
Solution Approach 1:
The patent applies different surface features at different locations on the light guide to achieve uniform light distribution. Specific patterns (prisms, diffusers, reflectors) are placed at strategic positions to control light extraction and achieve the desired uniformity without requiring a second light input edge
3Adaptability or versatility
If multiple light sources are used to achieve tailored light distributions, then light distribution flexibility is improved, but manufacturing cost increases
Solution Approach 1:
The patent achieves different light distribution patterns by changing the parameters of the surface features on the light guide (prism geometry, diffuser density, reflector orientation) rather than changing the number of light sources. This allows multiple light patterns to be produced from a single light input structure
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 enables efficient, compact, and customizable lighting solutions with tailored light distributions for various applications, reducing the need for multiple light sources and allowing for on-site adjustments, thereby enhancing lighting uniformity and flexibility.
Implementation Method 1
a light guide having an input face, an opposing face, an inner face, and an output face
Implementation Method 2
an LED board positioned adjacent to the light guide input face
Data Source
AI summary
A light fixture with a single edge lit optical assembly produces various light distributions which provide targeted control of light output with peak intensity that is non-normal to the light guide output face. The compact form factor and modular design of the light fixture embodiments having narrow width are particularly well-suited for use in linear lighting applications requiring suspended, surface and recessed installations typically used to illuminate walls, floors and/or ceilings. The light fixture can also be selectively configured and oriented during assembly and installation to achieve various lighting distributions. Optical components within the light fixture are typically positioned and retained in optical alignment with internal support features of a linear housing. The optical assembly typically includes LED board, light guide, and one or more reflective surfaces. Additionally an optically transmitting component further provides a fixture assembler a range of design choices. A variety of light distributions can be achieved including asymmetrical and symmetrical with one or more peak intensities. Further embodiments utilize selective alignment of light guide with one or more reflectors to achieve different light distributions.