EP2650599A1 - Lichtquellenstreifen, Beleuchtungsmodul und Leuchte - Google Patents
Lichtquellenstreifen, Beleuchtungsmodul und Leuchte Download PDFInfo
- Publication number
- EP2650599A1 EP2650599A1 EP12164127.8A EP12164127A EP2650599A1 EP 2650599 A1 EP2650599 A1 EP 2650599A1 EP 12164127 A EP12164127 A EP 12164127A EP 2650599 A1 EP2650599 A1 EP 2650599A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- light source
- reflector
- strip
- support portion
- base
- 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.)
- Withdrawn
Links
Images
Classifications
-
- 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
- F21V7/00—Reflectors for light sources
- F21V7/0008—Reflectors for light sources providing for indirect lighting
-
- 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
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S8/00—Lighting devices intended for fixed installation
- F21S8/02—Lighting devices intended for fixed installation of recess-mounted type, e.g. downlighters
- F21S8/026—Lighting devices intended for fixed installation of recess-mounted type, e.g. downlighters intended to be recessed in a ceiling or like overhead structure, e.g. suspended ceiling
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S8/00—Lighting devices intended for fixed installation
- F21S8/04—Lighting devices intended for fixed installation intended only for mounting on a ceiling or the like overhead structures
Definitions
- the invention relates to a Light source strip, lighting module and luminaire.
- Luminous ceiling panels also referred to as ceiling tiles, are widely available, mostly based on backlighting technology, either direct lit or side-lit.
- US3409766 describes a fully luminous, sound absorbing ceiling, in which the light is generated by indirect lighting of sound-absorbing ceiling panels by TL tubes at the side of the panel.
- known large-area ceiling sources are not widely applied, because they have several disadvantages.
- creating a large area source with conventional luminaire materials is relatively expensive.
- the large-area light-emitting ceilings interfere with other elements in the ceiling, such as sprinklers, sensors and air-conditioning vents.
- the large-area light sources lead to unwanted acoustic reflections at the ceiling, thus deteriorating the comfort of the people in the room.
- there is relatively very limited flexibility in the use of known luminaire ceiling panels as they have to be custom made to size to fit into a specific, existing false ceiling system.
- the light source strip comprises at least one light source and/or means for accommodating a light source mounted on a base, for example a LED thus forming a LED strip, a support portion extending substantially parallel to the base and a reflector having a front side for reflecting at least part of the light issued by the LED during operation, and connecting the base and the support portion, the LED is located in a concave portion of the strip formed by at least the reflector and the base.
- substantially parallel in this respect means that the base and the support portion may mutually be in an angled position of at the most 20°, preferably at the most 10°, more preferably at the most 5°.
- a light source could be an array of LEDs, and means for accommodating a lamp could be electrical contacts.
- Said concave portion of the strip could be formed by the base and the reflector, or by the base, the reflector and the support portion.
- the LED strip is provided with electrical contacts for contacting to a power supply.
- Said LED strip is of particular of use in false ceilings. In false ceilings ceiling tiles rest on a frame comprising elongated suspension brackets with a T-shaped cross section, said ceiling tiles can easily removed from the false ceiling via a tilt and shift movement.
- the LED-strip of the invention can easily be installed in such a false ceiling, for example by lifting a ceiling tile at one side from the T-shaped bracket on which it usually rests, then subsequently insert the LED strip in between the bracket and the tile.
- the LED strip rests with its base on the T-shaped bracket and carries the ceiling tile with its support portion, finally the LED strip is connected to a power supply.
- a combination of at least two, mutually connected LED strips, forming a lighting module can be used in combination with a ceiling tile.
- the combination of the LED strip/lighting module and ceiling tile forms a relatively unobtrusive luminaire.
- the LED strip or lighting module when the LED strips are mutually joined via a joint located at the backside of the reflector or via a frame extending between the base and reflector at the front side of the reflector, is a slim, open structure, the visual impact is minimal, which enables a clean ceiling without much distinction between ceiling tiles with or without lighting function.
- the LED strip or lighting module may be applied as a recessed fixture illuminating a slightly elevated conventional ceiling tile, as a surface mounted fixture illuminating a ceiling tile at the normal position, or as a pendant fixture illuminating multiple ceiling tiles.
- the ceiling panel can be of any type.
- Large ceiling area's or even the complete ceiling may be equipped with the LED strip or with the lighting module, since it enables the use of ceiling tiles comprising at least one device selected from the group consisting of sprinklers, sensors, narrow beam light sources, loud-speakers, ventilation grill, and air-conditioning vents. Furthermore, the acoustic properties of the suspended ceiling are not deteriorated, because the passage of sound to sound absorbing ceiling tiles is neither hindered by the LED strip nor by the open frame of the lighting module.
- the indirect lighting module is powered by a low-voltage source, such as 36 V, or lower, for example 24V.
- a low-voltage source such as 36 V, or lower, for example 24V.
- the low-voltage source may be integrated into the dropped false ceiling, like in the Emerge standard, as applied in dropped ceilings by Armstrong.
- the wiring is integrated in the T-bars.
- the indirect lighting module may contain a mechanical and electrical connector to the T-bar, where the electrical connection is made to the conductor on the "bulb" of the T-bar.
- the mechanical and electrical connection can be made to the conductor in the "reveal" (in the visible part of the T-bar). This allows for a very easy and flexible installation of the modules.
- LED strip could equally be substituted by light source strip in which the light source could be an elongated low/high pressure gas discharge lamp or an elongated halogen lamp.
- Fig. 1 shows a first, basic embodiment of the LED strip 1 according to the invention in perspective cross sectional view.
- the LED strip comprises a plurality of LEDs 3 on a PCB 10 in a concave portion 5 of the strip 7 and mounted on a base 9, a support portion 11 extending parallel to the base, and a straight reflector 13 having a front side 15.
- the reflector connects the base and the support portion.
- Said reflector is coated with an optically effective coating 17, in the figure a diffuse reflective layer 19, for example, aluminium oxide to diffusely scatter light rays 4 issued by the LEDs and impinging on the layer.
- the concave portion is formed by the base, reflector and support portion.
- the strip is made in one part by cutting and folding aluminium metal sheet, but alternatively could be made of steel, or plastic if the PCB provides for sufficient cooling of the LEDs.
- Fig. 2 shows a perspective view of a second embodiment of the LED strip 1 according to the invention, comprising only a single LED 3 mounted on a base 9.
- the strip 7 is made in one piece via an extrusion process from synthetic resin material, for example PMMA or polyethylene, and comprises the base 9, a support portion 11 and a concavely shaped reflector 13 connecting the base and the support portion.
- a concave portion 5 is formed by the base and the reflector.
- Fig. 3 shows a perspective end view of a third embodiment of the LED strip 1 according to the invention.
- the LED strip rests with its base 9 on a suspension bracket 23, said bracket having a T-shaped cross section.
- On the base a plurality of LEDs 3 are mounted and arranged in a row, defining a length direction or length axis 25.
- the LEDs 3 are located inside a concave portion 5 of the strip, said concave portion being formed by the base and the reflector 13.
- the reflector has a cross-section transverse to the length direction shaped as a branch of a parabola 39, the LEDs being positioned in the vicinity of a focal point 41 of said parabola branch.
- the LEDs may be positioned just before (closer to the reflector) or just behind the focal point, in order to aim the light slightly above or slightly below the horizon, respectively, above the horizon is mostly preferred to avoid looking into the source via the reflector.
- the optical axis of the light will be horizontal after reflection, but the beam will be partly above and partly below the horizon.
- the LED strip has an end face 31 which is closed by an end cap 33, in the figure made of translucent polyethylene.
- the support portion and the reflector border a second concave portion 35, which second concave portion is located at a backside 37 of the reflector.
- a LED strip 1 is shown having practically the same cross section as the LED strip of Fig. 3 , except for a further support portion 12, extending in a direction transverse to the support portion.
- the support portion could be made bendable with respect to the base and reflector to adjust its position to the slanted orientation of the ceiling tile for better supporting said ceiling tile.
- Fig 4 further shows that said second concave portion 35 enables the LED strip to rest with its support portion 11 on the T-shaped bracket 23, and thus forming a LED strip suspending and protruding from a false ceiling (not shown).
- a light transmissive plate 43 is provided to the LED strip in a light emission window 51, said plate resting on the base 9 of the LED strip and practically abutting the LEDs 3.
- Fig. 5 shows a cross-section of an embodiment of a lighting module 21 according to the invention.
- the lighting module comprises two LED strips 1 connected to each other via a joint 45 at the backside 37 of the reflector 13, each LED strip being independently on/off switchable.
- This embodiment is only suitable for suspended applications not as a recessed version.
- the module rests via the support portions 11 from a T-shaped bracket 23, adjustable in height, and suspends from a false ceiling 47 of which only one T-shaped bracket and two ceiling panes 49 or ceiling tiles 49 are shown.
- One side of each of the ceiling panes shown rests also on the T-shaped bracket.
- plane P extend transverse to the plane of the drawing and through the light emission window 51.
- Light rays 4 issued by the LEDs 3 and impinging on a specular reflective coating 17 of the reflector are either reflected to a respective ceiling panel or are reflected towards a light emission window 51 and subsequently to the exterior. Care should be taken that at least one diffusing step occurs for each ray issued by the LED before said light ray is issued to the exterior. This diffusion step could be either at the reflector, ceiling tile, or if not at none of these two, at a diffuser plate which then should be provided in the light emission window. In the figure light rays impinging on the ceiling pane are diffusely reflected to the light emission window by said ceiling pane, which thereto could be provided with a diffusely reflective coating.
- the reflector is specular reflective, but a alternatively, the reflector could be provided with a diffuse reflective coating, or high gloss white surface as an intermediate between specular and diffuse reflective coating or as a further alternative a specular ripple as an anisotropic diffuse reflector specular in the direction of the cross-section, and diffuse in extrusion direction.
- Fig. 6 shows a cross section of an embodiment of a luminaire 53 according to the invention, said luminaire being formed by a combination of a lighting module 21, comprising two LED strips 1 connected to each other via a frame 55 connecting the front side 15 of the reflectors 13 of the respective LED strips, and at least one ceiling tile 49.
- the lighting module rests with it support portion 11 on the T-shaped brackets 23, the ceiling tile on its turn rests on the support portions of the LED strips.
- the LED strips each have a further support portion 12 that confines the ceiling tile and limits the possibility of the LED strips getting tilted with respect to the plane P of the false ceiling 47.
- the luminaire further has a light transmissive plate 43 provided in the light emission window 51.
- Fig. 7-9 each shows a cross section of a part of a false ceiling comprising various embodiments of luminaire according to the invention.
- the luminaire 53 suspends and protrudes from the false ceiling 47 because its rests with its support portions 11 on the T-shaped-brackets 23, the T-shaped brackets form a grid and are all being suspended from the real ceiling at the same height.
- a smooth transition between the plane P of the false ceiling and the light emission window 51 of the luminaire has been attained by a slanted position of an adjacent ceiling tile 50 by making it rest with one side on an extension 57 of the base 9.
- a luminaire 53 according to the invention is shown which is in a recessed position with respect to the plane P of the false ceiling.
- the originally present ceiling pane 49 has been lifted somewhat with respect to the T-shaped brackets 23 and the luminaire has been inserted in between.
- a light transmissive plate 43 in the figure a lamellae like, open grid structure, has been inserted.
- the ceiling tile rests on the support portion 11, the luminaire rests on the plate and the plate rests on the T-shaped bracket.
- the ceiling tile is an acoustic tile, i.e. it has an open, more or less porous structure, to enable air and sound/noise to pass and to reflect light, and further comprises a device 59, in the figure a motion sensor.
- Fig. 9 shows in cross section an asymmetric luminaire 53, with an elongated, low pressure, mercury, fluorescent, discharge lamp 3 as a light source.
- the light source strip 1 is inserted in between the ceiling tile 49 and the T-shaped bracket 23 at only one side of a ceiling tile, resulting in the ceiling tile to assume a slanted orientation with respect to the plane P of the false ceiling.
- the light source illuminates the ceiling tile from one side 59.
- the asymmetric luminaire creates a lighting effect similar to that of a traditional "factory roof', i.e. slanted roof panels with light entering the room by vertical windows between the slanted roof elements.
- the orientation of the slanted ceiling tile enables use by an interior designer or architect to create a specific, desired effect in the room.
- Fig. 10a-c show a cross-sectional view of a lighting module 21 with two LED strips 1 mutually connected via a joint 45 located at the backside 37 of the reflector 13 at their bases 9 at various stages of their mounting on the T-shaped bracket 23 of the false ceiling.
- the LED strips are made of flexible bendable or resilient material to enable insertion of the T-shaped bracket into the second concave portion 35.
- the lighting module can either rest with its support portion 11 or with its base on the T-shaped bracket.
- Fig. 11 show a part of a false ceiling 47 with only one installed LED strip 1, which LED strip is provided with two flaps 61 on either end face 31 of the LED strip.
- the false ceiling comprises a grid 65 of T-shaped brackets on which the ceiling tiles rest. By insertion of one LED strip in between the T-shaped bracket and the ceiling tile (said ceiling tile is not shown), said ceiling tile is somewhat lifted, thus leaving an opening 63 between said ceiling tile and the grid of T-shaped brackets.
- the flaps in the figure of a triangular shape, are bendable attached to the end caps of the LED strip and are oriented in a transverse direction to the length direction 25 of the LED strip to function as a lid and to close these openings.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP12164127.8A EP2650599A1 (de) | 2012-04-13 | 2012-04-13 | Lichtquellenstreifen, Beleuchtungsmodul und Leuchte |
PCT/IB2013/052915 WO2013153534A1 (en) | 2012-04-13 | 2013-04-12 | Light source strip, lighting module and luminaire |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP12164127.8A EP2650599A1 (de) | 2012-04-13 | 2012-04-13 | Lichtquellenstreifen, Beleuchtungsmodul und Leuchte |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2650599A1 true EP2650599A1 (de) | 2013-10-16 |
Family
ID=46025509
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12164127.8A Withdrawn EP2650599A1 (de) | 2012-04-13 | 2012-04-13 | Lichtquellenstreifen, Beleuchtungsmodul und Leuchte |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP2650599A1 (de) |
WO (1) | WO2013153534A1 (de) |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2015000864A1 (en) * | 2013-07-04 | 2015-01-08 | Koninklijke Philips N.V. | Light-emitting device |
WO2016069645A1 (en) * | 2014-10-28 | 2016-05-06 | Cree, Inc. | Edge lit fixture |
USD779699S1 (en) | 2015-02-13 | 2017-02-21 | Cree, Inc. | Edge lit recessed linear fixture in ceiling |
US20170082252A1 (en) * | 2014-12-31 | 2017-03-23 | Aron Lighting LLC | T-bar Lighting Assembly |
USD797976S1 (en) | 2015-02-13 | 2017-09-19 | Cree, Inc. | Edge lit recessed linear fixture |
US9939147B2 (en) | 2013-11-18 | 2018-04-10 | Philips Lighting Holding B.V. | Acoustic lighting tile |
WO2019217229A1 (en) | 2018-05-08 | 2019-11-14 | Jlc-Tech Ip, Llc | Indirect led lighting for a suspended ceiling |
US10774529B2 (en) | 2017-12-29 | 2020-09-15 | Certainteed Ceilings Corporation | Ceiling tile with integrated lighting and ceiling system |
US10859242B2 (en) | 2018-02-07 | 2020-12-08 | Aron Lighting LLC | Downlight for ceiling system |
USD921266S1 (en) | 2018-11-16 | 2021-06-01 | Aron Lighting LLC | Lighting fixture in a ceiling tile arrangement |
US11079076B2 (en) | 2014-10-28 | 2021-08-03 | Ideal Industries Lighting Llc | Edge lit fixture |
US11543092B2 (en) | 2020-06-08 | 2023-01-03 | Aron Lighting LLC | Ceiling mounted assembly for electrical components |
US11940121B2 (en) | 2022-08-30 | 2024-03-26 | Abl Ip Holding Llc | Light fixture for ceiling grid |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2023110670A1 (en) * | 2021-12-13 | 2023-06-22 | Signify Holding B.V. | A tile light luminaire for a suspended tile light ceiling assembly, as well as such suspended tile light ceiling assembly |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3409766A (en) | 1967-01-04 | 1968-11-05 | Lithonia Lighting Inc | Combination lighting and cooling system |
WO2008146229A2 (en) * | 2007-05-29 | 2008-12-04 | Koninklijke Philips Electronics N.V. | Illumination system, luminaire and backlighting unit |
WO2011019753A1 (en) * | 2009-08-13 | 2011-02-17 | Intematix Corporation | Led-based lamps |
EP2375127A2 (de) * | 2010-04-09 | 2011-10-12 | Norbert Meier | Profilelement |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7578600B2 (en) * | 2003-10-10 | 2009-08-25 | Federal Signal Corporation | LED light assembly with reflector having segmented curve section |
US8113680B2 (en) * | 2009-05-05 | 2012-02-14 | Lightology, Llc | Light fixture with directed LED light |
-
2012
- 2012-04-13 EP EP12164127.8A patent/EP2650599A1/de not_active Withdrawn
-
2013
- 2013-04-12 WO PCT/IB2013/052915 patent/WO2013153534A1/en active Application Filing
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3409766A (en) | 1967-01-04 | 1968-11-05 | Lithonia Lighting Inc | Combination lighting and cooling system |
WO2008146229A2 (en) * | 2007-05-29 | 2008-12-04 | Koninklijke Philips Electronics N.V. | Illumination system, luminaire and backlighting unit |
WO2011019753A1 (en) * | 2009-08-13 | 2011-02-17 | Intematix Corporation | Led-based lamps |
EP2375127A2 (de) * | 2010-04-09 | 2011-10-12 | Norbert Meier | Profilelement |
Cited By (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2015000864A1 (en) * | 2013-07-04 | 2015-01-08 | Koninklijke Philips N.V. | Light-emitting device |
US9939147B2 (en) | 2013-11-18 | 2018-04-10 | Philips Lighting Holding B.V. | Acoustic lighting tile |
US11079076B2 (en) | 2014-10-28 | 2021-08-03 | Ideal Industries Lighting Llc | Edge lit fixture |
WO2016069645A1 (en) * | 2014-10-28 | 2016-05-06 | Cree, Inc. | Edge lit fixture |
US11428373B2 (en) | 2014-10-28 | 2022-08-30 | Ideal Industries Lighting Llc | Edge lit fixture |
US10690305B2 (en) | 2014-10-28 | 2020-06-23 | Ideal Industries Lighting Llc | Edge lit fixture |
US20170082252A1 (en) * | 2014-12-31 | 2017-03-23 | Aron Lighting LLC | T-bar Lighting Assembly |
US10808896B2 (en) * | 2014-12-31 | 2020-10-20 | Aron Lighting LLC | T-bar lighting assembly |
US11085600B2 (en) | 2014-12-31 | 2021-08-10 | Aron Lighting LLC | T-bar lighting assembly |
USD779699S1 (en) | 2015-02-13 | 2017-02-21 | Cree, Inc. | Edge lit recessed linear fixture in ceiling |
USD797976S1 (en) | 2015-02-13 | 2017-09-19 | Cree, Inc. | Edge lit recessed linear fixture |
US10774529B2 (en) | 2017-12-29 | 2020-09-15 | Certainteed Ceilings Corporation | Ceiling tile with integrated lighting and ceiling system |
US10859242B2 (en) | 2018-02-07 | 2020-12-08 | Aron Lighting LLC | Downlight for ceiling system |
WO2019217229A1 (en) | 2018-05-08 | 2019-11-14 | Jlc-Tech Ip, Llc | Indirect led lighting for a suspended ceiling |
EP3775679A4 (de) * | 2018-05-24 | 2021-05-12 | JLC-Tech IP, LLC | Indirekte led-beleuchtung für eine abgehängte decke |
USD921266S1 (en) | 2018-11-16 | 2021-06-01 | Aron Lighting LLC | Lighting fixture in a ceiling tile arrangement |
US11543092B2 (en) | 2020-06-08 | 2023-01-03 | Aron Lighting LLC | Ceiling mounted assembly for electrical components |
US11940121B2 (en) | 2022-08-30 | 2024-03-26 | Abl Ip Holding Llc | Light fixture for ceiling grid |
Also Published As
Publication number | Publication date |
---|---|
WO2013153534A1 (en) | 2013-10-17 |
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