Lighting device and corresponding method

Patent metadata

Field	Value
Publication number	US-9903998-B2
Application number	US-201614993144-A
Country	US
Kind code	B2
Filing date	Jan 12, 2016
Priority date	Jan 14, 2015
Publication date	Feb 27, 2018
Grant date	Feb 27, 2018

Abstract

A lighting device includes an elongated profiled body including at least one light permeable material, e.g. a polymeric material, having a mouth portion where an e.g. white light radiation source assembly is arranged which includes one or more electrically powered light radiation sources facing the profiled body. The light radiation emitted by the light radiation source assembly propagates through the light permeable material of the profiled body. The material of the profiled body includes pigments and is at least in part light diffusive, whereby, by propagating through profiled body, the light radiation becomes a colored light radiation of a color determined by the pigments and with a homogeneous near field distribution.

First claim

The invention claimed is:

1. A lighting device, comprising:
an elongated profiled body including at least one light permeable material, said profiled body having a mouth portion, and
a light radiation source assembly arranged at said mouth and including at least one electrically powered light radiation source arranged on a support board facing said profiled body, whereby light radiation emitted by said light radiation source assembly propagates through said at least one light permeable material of the profiled body,
wherein said profiled body includes two lateral inserts of a light impermeable material extending lengthwise of said profiled body,
wherein said lateral inserts have protuberances protruding inwardly of the profiled body to provide abutment formations with said light radiation source assembly abutting against said protuberances;
a layer of sealing material of the device applied on the side of said light radiation source assembly opposed to said profiled body; and the layer of sealing material is disposed onto the side of the support board facing outside the lighting device;
wherein said material of the profiled body includes pigments and is at least in part light diffusive, whereby, by propagating through said profiled body, said light radiation becomes a coloured light radiation of a colour determined by said pigments and with a homogeneous near field distribution.

2. The lighting device of claim 1 , wherein said light permeable material comprises:
a first layer including pigments, whereby, by propagating through said first layer, said light radiation becomes a coloured light radiation with a colour determined by said pigments, and
a second, light diffusive layer, whereby, by propagating through said second layer, said light radiation assumes a homogeneous near field distribution,
said first layer and said second layer being facing and opposed said mouth portion, respectively.

3. The lighting device of claim 1 , wherein said profiled body includes a single layer which includes pigments and is light diffusive, whereby, by propagating through said single layer, said light radiation becomes a coloured light radiation with a colour determined by said pigments and with a homogeneous near field distribution.

4. The lighting device of claim 1 , further comprising a filling of a light permeable material between said light radiation source assembly and said profiled body.

5. The lighting device of claim 1 , wherein said profiled body is recessed at said mouth portion.

6. The lighting device of claim 1 , wherein:
said at least one light radiation source is an LED source, and
said profiled body is a profiled extruded body.

7. A method of providing a lighting device, comprising:
providing an elongated profiled body including at least one light permeable material, said profiled body having a mouth portion,
arranging at said mouth portion a light radiation source assembly including at least one electrically powered light radiation source on a support board facing said profiled body, whereby the light radiation emitted by said light radiation source assembly propagates through said at least one light permeable material of the profiled body,
including in said profiled body two lateral inserts of a light impermeable material extending lengthwise of said profiled body, wherein the lateral inserts have protuberances protruding inwardly of the profiled body,
providing abutment formations with said light radiation source assembly abutting against said protuberances; and
including in said material of the profiled body pigments and light diffusive means whereby, by propagating through said profiled body, said light radiation becomes a coloured light radiation of a colour determined by said pigments and with a homogeneous near field distribution.

8. The lighting device of claim 1 , wherein:
said at least one light radiation source is an LED source or
said profiled body is a profiled extruded body.

Assignees

• Osram Gmbh

Inventors

• Alfier Alberto
• Bobbo Simon

Classifications

• F21Y2103/10

  comprising a linear array of point-like light-generating elements · CPC title

• F21S4/22

  flexible or deformable, e.g. into a curved shape · CPC title

• F21V3/0445

  Mechanical Engineering · mapped topic

• F21K9/90

  Methods of manufacture · CPC title

• F21V9/08 Primary

  for producing coloured light, e.g. monochromatic; for reducing intensity of light (with provision for controlling the colour F21V9/40) · CPC title