Emergency Luminaire Microstructured Diffuser Light Distribution
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Solution Overview
Problem
Existing emergency lighting solutions, such as anti-panic and evacuation route luminaires, face challenges in achieving uniform and efficient light distribution over large areas using traditional diffusers and LEDs, which often require complex microstructures and multiple optical components.
Innovation Solution
A compact optical component with a diffuser made of polycarbonate or similar plastic, featuring a microstructured inner surface that converts LED light rays into desired angles using a calculated sawtooth microstructure, allowing for efficient light projection and distribution in emergency lighting applications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If traditional diffusers with microstructures are used to achieve uniform light distribution, then light distribution uniformity is improved, but device complexity increases due to requiring multiple optical components and complex microstructures
Solution Approach 1:
The patent combines multiple optical functions (diffusion, beam shaping, light direction) into a single integrated optical component made of polycarbonate. This single component replaces what would traditionally require multiple separate optical elements, reducing assembly complexity while maintaining uniform light distribution across the illuminated area.
Solution Approach 2:
The polycarbonate optical component performs multiple functions simultaneously: it acts as a diffuser to scatter light uniformly, a lens to shape the beam, and a light-directing element with microstructured surfaces. This multi-functionality eliminates the need for separate components and simplifies the overall optical system.
2Manufacturing precision
If complex microstructures are used to achieve precise light control, then light distribution precision is improved, but manufacturing difficulty increases
Solution Approach 1:
The patent uses injection molding parameters and microstructure geometry parameters to achieve precise light control. By optimizing the microstructure pattern, material properties, and molding parameters during manufacturing, the system achieves precise light distribution without requiring post-manufacturing adjustments or complex assembly procedures.
Solution Approach 2:
The patent replaces complex mechanical adjustments and multi-component assemblies with a single molded polycarbonate component that has integrated microstructures. The precision is achieved through the molded geometry itself rather than through mechanical assembly of multiple precision parts.
3Illumination intensity
If multiple optical components are used to achieve desired photometric patterns, then lighting performance is improved, but compactness deteriorates
Solution Approach 1:
The patent merges multiple optical components (diffuser, lens, beam shaper) into a single integrated polycarbonate optical element. This consolidation maintains all necessary lighting functions and photometric patterns while significantly reducing the overall volume and simplifying the luminaire 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 provides a single-piece diffuser with integrated lenses that efficiently illuminate large areas, optimizing light use and distribution for anti-panic, evacuation, and other photometric patterns, enhancing uniformity and compliance with regulatory impact resistance standards.
Implementation Method 1
a lens has been shaped, which is defined by a microstructure that receives the light emitted by an LED located at a distance from said microstructure such that it receives direct light from the LED within the opening angle of the - normally- Lambertian projection thereof to achieve maximum light use. The configuration of said microstructure is such that it converts each ray into another outer ray with the desired angle
Data Source
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AI summary
The present invention relates to an emergency luminaire, provided with a casing through which it is attached to the ceiling or wall, exhibiting a diffuser (D) with a smooth (flat or curved) outer surface (SEx) and an inner surface on which lenses (L) defined by microstructures (Ms) have been shaped that have been calculated by means of an algorithm that determines the configuration of a plurality of sawtooth cuts, with a constant period or peak-to-valley distance from the outside to the centre on the horizontal axis (Dx), the longest edge of which makes up the active face (as0, as1, etc.) thereof, facing the LED, and the opening angle (Alfap0) of the successive sawtooth edges (as0, as1, etc.) increases progressively towards the centre of the lens, so that each ray of light of the output beam through said lenses is adjusted in the desired direction according to the light projection of the application.