Lighting Device Sparkling Effect via Directional Collimation
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Solution Overview
Problem
Existing lighting solutions either produce expensive sparkling effects or high lumen output, but not both simultaneously, leading to unsatisfactory light intensity and aesthetic appearance.
Innovation Solution
A lighting device with at least one optical element made of partially transparent material featuring through openings that collimate light, providing a sparkling effect by varying brightness with direction, while maintaining high lumen output and being cost-effective.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If multiple refractive components are used to produce sparkling effects, then the aesthetic appearance is improved, but the manufacturing cost increases significantly
Solution Approach 1:
The patent replaces expensive refractive optical components with a cheap diffusing element that has a simple planar structure. This diffusing element can be easily manufactured and is cost-effective, while still achieving the desired sparkling effect when combined with a reflective element having a specific geometric structure.
Solution Approach 2:
The patent changes the geometric parameters of the reflective element, specifically using a planar reflective surface with a specific pattern (such as a grid or array of reflective zones) to generate the sparkling effect. This geometric parameter optimization allows achieving aesthetic effects without using expensive refractive components.
2Illumination intensity
If the size of the refractive component is increased to enhance the sparkling effect, then the aesthetic appearance is improved, but the manufacturing cost increases
Solution Approach 1:
The patent divides the reflective element into multiple discrete zones or segments (such as a grid pattern of reflective zones). This segmentation allows the sparkling effect to be achieved through the collective behavior of multiple small reflective zones rather than requiring a single large refractive component, thereby reducing manufacturing cost.
3Productivity
If a phosphor is arranged at a distance from the light source to increase lumen output, then the light intensity is improved, but the sparkling effect is lost
Solution Approach 1:
The patent introduces a diffusing element as an intermediary component between the light source and the reflective element. This diffusing element has a specific optical property that allows it to scatter light while preserving the directional information needed for the sparkling effect. The reflective element then redirects this scattered light to produce both high lumen output and the desired sparkling effect.
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 achieves a sparkling effect in a simple and durable manner without compromising lumen output, using less expensive and simpler optical elements, suitable for various lighting applications including indoor illumination.
Implementation Method 1
the at least one optical element comprises a plurality of through openings adapted for collimating the light emitted by the light source such as to cause light exiting the at least one optical element to comprise a brightness varying with the direction in which the light exits the at least one optical element
Data Source
AI summary
A lighting device (11, 12, 13, 14) comprising a light source (101, 102, 103, 104) emitting light, and at least one optical element (30, 301, 302, 303, 304) arranged in front of said light source, said at least one optical element comprising an at least partially transparent material such as to allow at least part of the light emitted by the light source to be transmitted therethrough, wherein said at least one optical element comprises a plurality of through openings (20, 201, 211, 202, 212, 203, 213, 204, 214) adapted for collimating said light emitted by said light source such as to cause light exiting said at least one optical element to comprise a brightness varying with the direction in which said light exits said at least one optical element.