US 10,371,354 B2Granted

Illumination device

AssigneeCoeLux S.r.l.

InventorsPaolo Di Trapani, Marta Cecilia Pigazzini

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Abstract

An embodiment of an illumination device comprising a broad band artificial light source and a non-liquid chromatic diffuser transparent to visible light comprising a dispersion of elements of nanometrical dimensions of a first material with of certain refractive index in a second material with different refractive index, wherein the light is scattered producing a separation and different distribution between cold and hot components of the light originally produced by the source, according to a scattering process in “Rayleigh” regime. The device allows illumination effects similar to those of natural outdoor environments to be reproduced in indoor environments.

Claims22

Dependent claims

An artificial illumination method for reproducing, in an indoor environment, the light and colors of the sun and of the sky, the artificial illumination method comprising:

artificially producing the simultaneous presence of two different color components of visible light, the two different color components comprising:
diffused skylight, wherein blue light is dominant in the skylight;
and
directed sunlight having a low blue light component;
wherein artificially producing the simultaneous presence of the skylight and the sunlight comprises producing the skylight and the sunlight in light cones of different angular divergence, wherein the sunlight is directed in a relatively narrow inner cone and the skylight is directed in a relatively wider cone;
wherein the skylight illuminates
a shadow formed by an object with respect to the sunlight, wherein the object is located in the center of the light cone of the sunlight, and
an outer area outside of the light cone of the sunlight, which is not illuminated by the sunlight.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/212,675Filed 18 Jul 2016 · continuation
Priority: IT MI2008A113524 Jun 2008
Published: US 2017/0016591 A119 Jan 2017
Granted: 6 Aug 2019
Term ends: Not estimatedThe source records don’t support an estimate.

Classification28 codes

F21V 9/02
Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters: for simulating daylight
F21V 3/00
Globes
F21V 9/08
Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters: for producing coloured light, e.g.…
F21V 9/30
Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters: elements containing photoluminescent…

Family

PCT/EP2009/057672Parent of this continuation · filed 19 Jun 2009
Application14/148,457Parent of this continuation · filed 6 Jan 2014
US 8,622,560 B2Parent of this continuation · filed 7 Jan 2014
US 2017/0016591 A1Pre-grant publication · published 19 Jan 2017
US 9,416,940 B2Parent of this continuation
Application13/001,050Parent of this continuation
US 2011/0194270 A1Published application
US 2014/0192509 A1Published application
US 10,371,354 B2This patent

From the US filing history. Foreign family members aren’t listed.

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