EP3388742A1 - Verfahren zur herstellung eines gehäuses einer beleuchtungsvorrichtung und entsprechender beleuchtungseinrichtung - Google Patents

Verfahren zur herstellung eines gehäuses einer beleuchtungsvorrichtung und entsprechender beleuchtungseinrichtung Download PDF

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Publication number
EP3388742A1
EP3388742A1 EP18165480.7A EP18165480A EP3388742A1 EP 3388742 A1 EP3388742 A1 EP 3388742A1 EP 18165480 A EP18165480 A EP 18165480A EP 3388742 A1 EP3388742 A1 EP 3388742A1
Authority
EP
European Patent Office
Prior art keywords
central body
light radiation
functional layer
lighting device
optical functional
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP18165480.7A
Other languages
English (en)
French (fr)
Other versions
EP3388742B1 (de
EP3388742A8 (de
Inventor
Mr. Martin REISS
Mr. Roberto DIDONE'
Mr. Luigi PEZZATO
Mr. Lorenzo BALDO
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Osram GmbH
Osram SpA
Original Assignee
Osram GmbH
Osram SpA
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Filing date
Publication date
Application filed by Osram GmbH, Osram SpA filed Critical Osram GmbH
Publication of EP3388742A1 publication Critical patent/EP3388742A1/de
Publication of EP3388742A8 publication Critical patent/EP3388742A8/de
Application granted granted Critical
Publication of EP3388742B1 publication Critical patent/EP3388742B1/de
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Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S4/00—Lighting devices or systems using a string or strip of light sources
    • F21S4/20—Lighting devices or systems using a string or strip of light sources with light sources held by or within elongate supports
    • F21S4/22—Lighting devices or systems using a string or strip of light sources with light sources held by or within elongate supports flexible or deformable, e.g. into a curved shape
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S4/00—Lighting devices or systems using a string or strip of light sources
    • F21S4/20—Lighting devices or systems using a string or strip of light sources with light sources held by or within elongate supports
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S4/00—Lighting devices or systems using a string or strip of light sources
    • F21S4/20—Lighting devices or systems using a string or strip of light sources with light sources held by or within elongate supports
    • F21S4/28—Lighting devices or systems using a string or strip of light sources with light sources held by or within elongate supports rigid, e.g. LED bars
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V15/00—Protecting lighting devices from damage
    • F21V15/01—Housings, e.g. material or assembling of housing parts
    • F21V15/013—Housings, e.g. material or assembling of housing parts the housing being an extrusion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V9/00—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters

Definitions

  • the present description refers to methods for the production of housings for lighting devices.
  • One or more embodiments may refer to lighting devices employing solid-state light radiation sources, e.g. LED sources.
  • An emerging trend in the sector involves the implementation of lighting devices provided with housings having different optical functions, e.g. adapted to provide a diffused lighting or to change the color of the light radiation.
  • a solution which may be selected in order to implement housings for lighting devices having different optical functions may envisage the production of the housing by means of a three-component co-extrusion.
  • a process may involve the co-extrusion of:
  • a drawback of said solution is that a three-component co-extrusion process may very costly and may involve a considerable waste of material, while being unsuitable for small production volumes.
  • One or more embodiments aim at providing solutions for achieving the results described in the foregoing, so as to overcome the previously outlined drawbacks.
  • said object is achieved thanks to a method having the features specifically set forth in the claims that follow.
  • One or more embodiments may also refer to a corresponding lighting device.
  • reference 10 denotes a lighting device adapted to be implemented, in one or more embodiments, as an elongated module (e.g. a rod or a ribbon), which may optionally be flexible and/or adapted to be cut to length according the application and usage needs.
  • an elongated module e.g. a rod or a ribbon
  • the lighting device 10 may therefore be considered as an element having indefinite length, shown in the view of Figure 7 in cross section with respect to the main extension direction thereof.
  • device 10 may include a housing 12, e.g. having a channel-shaped profile.
  • the housing 12 may include a central body 14 interposed between two flanks 16 extending lengthwise along two opposite side of the central body 14.
  • the housing 12 may include an optical functional layer 18, applied onto an outer surface 14a of the central body 14.
  • lighting device 10 may include a light radiation source unit 20.
  • the light radiation source unit 20 may include:
  • the light radiation sources 24 may be solid-state light radiation sources, such as e.g. LED light radiation sources.
  • the light radiation source unit 20 may include a U-shaped profile 26 made of a polymeric material, e.g. white silicone, containing the support board 22.
  • the light radiation source unit 20 may include a potting 28 of a polymeric material, e.g. while silicone, which may cover the support board 22 while leaving the light radiation sources 24 exposed.
  • the light radiation source unit 20 may be mounted into the housing 12 with the light radiation sources 24 facing an inner surface 14b of the central body 14. In one or more embodiments, the light radiation source unit 20 may be fixed to the housing 12 by means of a transparent glue layer 30.
  • the light radiation source unit 20 and the housing 12 may be implemented so as to be flexible, e.g. in an up/down direction with respect to the viewpoint of the Figures.
  • Figures 1 to 3 schematically show an embodiment of a method for the production of a housing 12 for a lighting device.
  • the method may include extruding a profile 34 of polymeric material including a central body 14 having an outer surface 14a.
  • the central body 14 may include a transparent or partially diffusive material (e.g. a polymeric material such as silicone).
  • the extruded profile may include flanks 16, which may be made of a reflective material, e.g. a polymeric material such as silicone, the reflective properties whereof may be obtained by means of reflective particles mixed into the polymer, according to a technique well-known in extrusion processes.
  • a reflective material e.g. a polymeric material such as silicone
  • the material of the central body 14 and the material of the flanks 16 may be co-extruded simultaneously in a bi-component co-extrusion process known in itself, after which an extruded profile 34 is obtained having the cross-section shape shown in Figure 1 .
  • the extruded profile 34 obtained at the output of the bi-component co-extrusion process may be subjected to a step of dispensing a polymeric material, schematically shown in Figure 2 , during which step a polymeric material 32 is dispensed onto the outer side 14a of central body 14.
  • the polymeric material 32 dispensed onto the outer side 14a of the central body 14 may constitute an optical functional layer 18, having the ability of changing one or more optical characteristics of the emitted light.
  • the assembly obtained after the step of dispensing the polymeric material 32 may then be subjected to curing.
  • the optical functional layer 18 may include a diffusive material, which is adapted to implement, on its outer surface (i.e. the side of housing 12 facing outwards of device 19), a homogeneous light output distribution in the near field.
  • the diffusive material may include a polymeric material (such as e.g. silicone), the diffusive behaviour whereof may be obtained e.g. by means of diffusive particles (e.g. including Al 2 O 3 ) mixed into the polymer.
  • the optical functional layer 18 may be a colored material, adapted to act as a color filter, by absorbing a fraction of the color spectrum of the radiation (which may be e.g. substantially white, the effect being however also achievable with a non-white radiation) emitted e.g. by sources such as LEDs 24, so as to originate a colored chromatic flux, i.e. a radiation having a color which is determined (directly or by means of a synthesis with the color of source 24) by the color of layer 18, i.e. for example by the color of the pigments mixed into the material of layer 18.
  • a colored chromatic flux i.e. a radiation having a color which is determined (directly or by means of a synthesis with the color of source 24) by the color of layer 18, i.e. for example by the color of the pigments mixed into the material of layer 18.
  • the optical functional layer 18 may contain diffusive particles and color pigments. In one or more embodiments, the optical functional layer 18 may contain phosphor particles, in order to change the color of the emitted light. In one or more embodiments, the optical functional layer 18 may contain phosphor particles and diffusing particles.
  • the implementation of the optical functional layer 18 by dispensing a polymeric material 32 may enable an easy modification of the optical functions of layer 18, by using different particles and by leaving the extruded base profile 34 unchanged. In one or more embodiments, it is thus possible to simplify the extrusion process, by reducing the number of materials to be co-extruded. In one or more embodiments, the formation of the optical functional layer by means of dispensing may avoid a three-component extrusion process, which may be costly, may involve a considerable waste of material and may be unsuitable for the production of small batches or special parts.
  • the light radiation source unit 20 may be fixed to the housing 12, e.g. by means of a transparent glue layer 30.
  • the light radiation sources 24 of the light radiation source unit 20 may face the inner wall 14b of central body 14, i.e. the wall of central body 14 opposed to the optical functional substrate 18.
  • the layers permeable to light radiation, i.e. the central body 14 and the optical functional layer 18, transmit the light radiation, and the side flanks 16, adapted to include a light-impermeable material, e.g. a reflective material, may be useful for concentrating the light radiation emission through the layers permeable to light radiation.
  • One or more embodiments may therefore concern a method for the production of a housing (e.g. 12) of a lighting device (e.g. 10), including:
  • the profile (e.g. 34) of polymeric material may include two flanks (e.g. 16) of reflective material, located on opposite sides of said central body (e.g. 14).
  • the material forming the central body (e.g. 14) and the material forming the flanks (e.g. 16) may be extruded simultaneously in a bi-component co-extrusion process.
  • the optical functional layer (e.g. 18) may include a diffusive material.
  • the optical functional layer (e.g. 18) includes a colored material.
  • the optical functional layer may include a diffusive material capable of forming, on said outer surface (e.g. 14a), a homogeneous distribution of output light in the near field.
  • the optical functional layer (e.g. 18) may include a colored material capable of acting as color filter.
  • the light radiation source unit (e.g. 20) may be fixed in the casing (e.g. 12) by means of a transparent glue layer (e.g. 30).
  • At least one source of light radiation may be a LED source.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
EP18165480.7A 2017-04-11 2018-04-03 Verfahren zur herstellung eines gehäuses einer beleuchtungsvorrichtung und entsprechender beleuchtungseinrichtung Active EP3388742B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT201700040217 2017-04-11

Publications (3)

Publication Number Publication Date
EP3388742A1 true EP3388742A1 (de) 2018-10-17
EP3388742A8 EP3388742A8 (de) 2018-12-19
EP3388742B1 EP3388742B1 (de) 2020-12-16

Family

ID=59859460

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18165480.7A Active EP3388742B1 (de) 2017-04-11 2018-04-03 Verfahren zur herstellung eines gehäuses einer beleuchtungsvorrichtung und entsprechender beleuchtungseinrichtung

Country Status (1)

Country Link
EP (1) EP3388742B1 (de)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100177532A1 (en) * 2009-01-15 2010-07-15 Altair Engineering, Inc. Led lens
US20100220469A1 (en) * 2008-05-23 2010-09-02 Altair Engineering, Inc. D-shaped cross section l.e.d. based light
DE102011051038A1 (de) * 2011-06-14 2012-12-20 Selux Aktiengesellschaft LED Beleuchtungsanordnung
WO2014026888A1 (de) * 2012-08-14 2014-02-20 Osram Gmbh Herstellen eines bandförmigen leuchtmoduls

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011110217A1 (en) * 2010-03-09 2011-09-15 Tri-O-Light Bv Light strip
DE102012218786B3 (de) * 2012-10-16 2014-02-13 Osram Gmbh Herstellen einer linearen Leuchtvorrichtung und entsprechende Leuchtvorrichtung
EP3045800B1 (de) * 2015-01-14 2017-06-14 OSRAM GmbH Beleuchtungsvorrichtung und zugehöriges verfahren

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100220469A1 (en) * 2008-05-23 2010-09-02 Altair Engineering, Inc. D-shaped cross section l.e.d. based light
US20100177532A1 (en) * 2009-01-15 2010-07-15 Altair Engineering, Inc. Led lens
DE102011051038A1 (de) * 2011-06-14 2012-12-20 Selux Aktiengesellschaft LED Beleuchtungsanordnung
WO2014026888A1 (de) * 2012-08-14 2014-02-20 Osram Gmbh Herstellen eines bandförmigen leuchtmoduls

Also Published As

Publication number Publication date
EP3388742B1 (de) 2020-12-16
EP3388742A8 (de) 2018-12-19

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