EP2587133B1 - Composant d'éclairage avec bande de réflecteur à del - Google Patents
Composant d'éclairage avec bande de réflecteur à del Download PDFInfo
- Publication number
- EP2587133B1 EP2587133B1 EP11187042.4A EP11187042A EP2587133B1 EP 2587133 B1 EP2587133 B1 EP 2587133B1 EP 11187042 A EP11187042 A EP 11187042A EP 2587133 B1 EP2587133 B1 EP 2587133B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- printed circuit
- circuit board
- reflector
- reflector strip
- led
- 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.)
- Not-in-force
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
- F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
- F21V29/50—Cooling arrangements
- F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
-
- 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
- F21V7/00—Reflectors for light sources
- F21V7/0066—Reflectors for light sources specially adapted to cooperate with point like light sources; specially adapted to cooperate with light sources the shape of which is unspecified
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2103/00—Elongate light sources, e.g. fluorescent tubes
- F21Y2103/10—Elongate light sources, e.g. fluorescent tubes comprising a linear array of point-like light-generating elements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2115/00—Light-generating elements of semiconductor light sources
- F21Y2115/10—Light-emitting diodes [LED]
Definitions
- the invention relates to a LED-based lighting component and to an assembly method of such a component. It specifically relates to a reflector mounted to a printed circuit board holding LEDs.
- LED lighting systems offer significant advantages over traditional incandescent, HID and fluorescent lamps. LEDs are of smaller size, offer higher reliability, longer operational life and lower energy consumption. However, there are specific requirements when using LEDs. As increased operating temperature significantly reduces lifetime, cooling is of high importance. Furthermore, most LED chips are approximately isotropic light sources with a lambertian light distribution, which must be adapted to specific requirements of a lighting system.
- the US patent application publication 2008/027894181 A1 discloses a printed circuit board with LEDs soldered thereon.
- injection molded reflectors are positioned above each individual LED.
- the disadvantage is that the reflectors must be manually assembled to the printed circuit board. This is a complex and time-consuming step.
- the reflectors are comparatively complex and expensive. Changing of light distribution requires modifying the reflectors, including redesigning, making new tools and producing new reflectors.
- EP 2 051 001 A2 discloses a roadway luminary and methods of use.
- a plurality of printed circuit boards with LEDs and a reflector are screwed by bolts and nuts into a lamp body.
- the problem to be solved by the invention is to provide means for cooling and adapting the light distribution of LEDs mounted to a carrier like a printed circuit board.
- a preferred embodiment relates to a LED-based lighting component comprising a strip shaped printed circuit board and a plurality of LEDs mounted thereon.
- a reflector strip is placed on the printed circuit board.
- the reflector strip is of sheet metal with punched reflectors.
- the reflectors extend over the surface of the printed circuit board. They guide the light of the LED chips, which often have an approximated lambertian light distribution.
- the reflector strip can easily be manufactured from sheet metal by a simple process of punching and bending the reflectors of the main plane, which is defined by the metal sheet. This allows for a precise and inexpensive manufacturing process of high volumes of the reflector strip.
- the reflector strip may comprise reflectors for any number of LEDs.
- the reflector strip preferably has guides for aligning the reflector strip to the printed circuit board.
- the guides are positioned within holes of the printed circuit board. Alignment of the reflector strip in relation to the LEDs by means of the guides is an easy procedure, as the reflector strip simply has to be placed on the printed circuit board and the to be moved over the surface of the printed circuit board until the guides snap into the holes of the printed circuit board. This further prevents damaging of LEDs or other electronic components on the printed circuit board by touching these with the reflector strip.
- the guides may be bent back from the rear side of the printed circuit board to hold the reflector strip down to the printed circuit board.
- the reflector strip may also be glued or soldered to the printed circuit board.
- the printed circuit board together with the reflector strip is inserted into a frame.
- the frame may have one or two braces.
- the frame may also serve as mechanical support, a heat sink or as an insulator of the assembly.
- the frame may be a strand casted, pultruded or extruded profile. It preferably has overhangs to hold the reflector strip down to the printed circuit board and further to fix the reflector strip and the printed circuit board within the frame.
- the reflector strip may have springs. These assert a predetermined force to the reflector strip.
- the printed circuit board with attached reflector strip is pushed into an opening at the end of the profile. Slipping of the printed circuit board within the profile may be prevented by end caps or by a lug or a screw.
- a reflector strip comprises at least one reflector.
- the reflector strip is made of metal, which may be aluminum or brass, or any other material, which has a light reflecting surface.
- the reflector strip is a metal sheet and the at least one reflector is punched from this metal sheet.
- the at least one reflector may be part of the surface of the reflector strip which is bent into an angle from a main plane of the reflector strip.
- the reflector strip has at least one blanking or opening for the at least one LED, thus surrounding the LED on the printed circuit board.
- the reflector strip may have further blankings leaving space for further electronic components on the printed circuit board.
- the reflector strip may further have at least one guide for precisely locating the reflector strip in relation to the printed circuit board.
- the reflector strip may have at least one spring and/or an elastic element for pressing the reflector strip to the printed circuit board.
- the reflector strip is placed on a printed circuit board, the printed circuit board holding at least one LED, preferably a plurality of LEDs in predetermined distances. Most preferably these predetermined distances are constant.
- a frame is provided for fastening the reflector strip to the printed circuit board.
- the frame may furthermore act as at least one of a mechanical support, a heat sink, an insulator.
- the frame is a profile, which may be manufactured by strand casting, pultrusion or extrusion.
- the frame is preferably made of metal or ceramics, most preferably of aluminum.
- the reflector strip has a first reflector and a second reflector, being located at opposing sides of a LED.
- the reflector strip has four reflectors being located at or four sides of a rectangular LED. There may be any other number or any other shape of the reflectors.
- the reflectors may also and/or alternatively shade light from the LED, thus preventing light radiating into unwanted directions.
- the reflector strip may be mounted at the opposite side of the LEDs of the printed circuit board.
- the printed circuit board may have at least one opening or slot, through which the individual reflectors can penetrate the printed circuit board. Mounting the strip to the printed circuit board is a very simple procedure. The first step the reflector strip is positioned on the printed circuit board. Alignment may be simplified by inserting at least one bent guide of the strip into at least one hole of the printed circuit board.
- the strip and the printed circuit board are inserted into the frame by pushing them into a slot opening at one end of the frame.
- the frame may further support alignment of the strip and the printed circuit board.
- the printed circuit board and the strip are held in a predetermined position relative to the frame.
- a further advantage of the embodiment is that the light distribution can easily be adapted to individual needs by simply changing the angle between a reflector and the reflector strip. This can even be done manually in a fine adjusting procedure after assembly. It is not necessary to manufacture a different strip for each modified reflector setting.
- At least one LED 20 is mounted to a printed circuit board 10.
- a reflector strip 30 is located on the printed circuit board.
- This reflector strip has at least one blanking or opening 38 for a LED. It further has at least one reflector 34.
- there is at least a second reflector 35 preferably at the opposite side of the LED in relation to the first reflector 34.
- the reflectors 34, 35 are punched out and bent upwards from the reflector strip. This may result in at least one additional blanking 39.
- For aligning the reflector strip to the printed circuit board there may be at least one guide 31.
- the at least one guide 31 is punched out of the reflector strip. Furthermore, it is preferred, if there is at least one flat spring 32, which preferably is also punched out of the reflector strip.
- the length of the reflector strip is preferably adapted to the number of LEDs on the printed circuit board. It may have a length from 10 mm up to 1 meter or more.
- the reflector strip may alternatively have a length adapted to one LED. It may comprise only one blanking or opening 38 for a LED and the reflectors required for the LED, e.g. two or four reflectors.
- Figure 2 shows the preferred embodiment in a side view.
- first reflector 34 and the second reflector 35 are shown from their sides in an angle and bent upwards from the surface of reflector strip 30, which is located on the printed circuit board 10.
- Reflector strip 30 on top of the printed circuit board 10 is assembled with a frame 40.
- the frame has at least one overhang 41 to hold the reflector strip 30 down to the printed circuit board 10. It preferably interacts with the at least one flat spring 32 to assert a predetermined force to the reflector strip.
- Frame 40 may be designed to act as a mechanical support structure and/or a heat sink and/or electrical insulator for the assembly. It is preferred if the reflector strip has approximately the same width as the printed circuit board.
- Figure 4 shows in detail the alignment of reflector strip 30 with printed circuit board 10.
- a bent guide tip 33 of reflector strip 30 is inserted into a hole 11 of the printed circuit board 10 thereby allowing precise positioning of the reflector strip 30 in relationship to printed circuit board 10.
- the bent guide tip 33 with the extent through printed circuit board 10 to its side opposing the reflector strip. It may further be bent to a U- shape to fix the reflector strip to the printed circuit board.
- Figure 5 shows another embodiment, where four reflectors enclose LED 20.
- a first reflector 34, second reflector 35, third reflector 36 and fourth reflector 37 enclose the LED at four sides.
- Figure 6 shows the previous embodiment in a side view.
- first reflector 34 and the second reflector 35 are shown from their sides in an angle and bent upwards from the surface of reflector strip 30, which is located on the printed circuit board 10.
- reflector 37 is shown from its rear side.
- FIG 7 the embodiment with four reflectors is shown in a state assembled together with a frame 40.
- reflectors 36 and 37 are shown from their sides.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Fastening Of Light Sources Or Lamp Holders (AREA)
- Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
Claims (6)
- Un composant d'éclairage basé sur DEL comprenant au moins :- au moins une DEL (20) montée sur une carte de circuit imprimé (10)- une bande réfléchissante (30) située sur la carte de circuit imprimé, la bande réfléchissante comprenant une plaque de métal définissant un plan principal, et ayant au moins un réflecteur (34, 35, 36, 37) étant incliné contre le plan principal pour dévier la lumière et/ou pour assombrir la lumière à partir de cette au moins une DEL,Caractérisé en ce que
Le composant comprend un cadre (40) pour maintenir la bande réfléchissante (30) sur la carte de circuit imprimé (10). - Le composant d'éclairage basé sur DEL selon la revendication 1,
Caractérisé en ce que
La bande réfléchissante (30) possède un premier réflecteur (34) et un deuxième réflecteur (35) situés à des côtés opposés de cette au moins une DEL (20). - Le composant d'éclairage basé sur DEL selon la revendication 1,
Caractérisé en ce que
La bande réfléchissante (30) possède quatre réflecteurs (34, 35, 36, 37) situés à quatre côtés de cette au moins une DEL (20). - Le composant d'éclairage basé sur DEL selon l'une des revendications précédentes,
Caractérisé en ce que
La bande réfléchissante (30) possède au moins un guide (33) qui est inséré dans un trou (11) de la carte de circuit imprimé (10) et définit par conséquent la position de la bande réfléchissante (30) relative à la carte de circuit imprimé (10). - Le composant d'éclairage basé sur DEL selon la revendication 1,
Caractérisé en ce que
La bande réfléchissante (30) possède au moins un ressort (32) pour interagir avec le cadre (40) pour maintenir la bande réfléchissante (30) en bas de la carte de circuit imprimé (10). - Procédé de fabrication d'un composant d'éclairage basé sur DEL selon la revendication 1, comprenant les étapes de :a) positionnement et alignement d'une bande réfléchissante (30) sur une carte de circuit imprimé (10), etb) insertion de la bande réfléchissante (30) avec la carte de circuit imprimé (10) dans un cadre (40), le cadre (40) maintenant la bande réfléchissante (30) sur la carte de circuit imprimé (10).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP11187042.4A EP2587133B1 (fr) | 2011-10-28 | 2011-10-28 | Composant d'éclairage avec bande de réflecteur à del |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP11187042.4A EP2587133B1 (fr) | 2011-10-28 | 2011-10-28 | Composant d'éclairage avec bande de réflecteur à del |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2587133A1 EP2587133A1 (fr) | 2013-05-01 |
EP2587133B1 true EP2587133B1 (fr) | 2016-04-20 |
Family
ID=45442809
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11187042.4A Not-in-force EP2587133B1 (fr) | 2011-10-28 | 2011-10-28 | Composant d'éclairage avec bande de réflecteur à del |
Country Status (1)
Country | Link |
---|---|
EP (1) | EP2587133B1 (fr) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20170175978A1 (en) * | 2014-04-07 | 2017-06-22 | 3M Innovative Properties Company | Light horn arrays for ducted lighting systems |
US9541255B2 (en) | 2014-05-28 | 2017-01-10 | Lsi Industries, Inc. | Luminaires and reflector modules |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7896514B2 (en) * | 2006-07-25 | 2011-03-01 | Showa Denko K.K. | Light emitting device and display device using same |
JP2008270144A (ja) * | 2007-03-22 | 2008-11-06 | Furukawa Electric Co Ltd:The | ライトボックス |
JP5363462B2 (ja) | 2007-05-07 | 2013-12-11 | コーニンクレッカ フィリップス エヌ ヴェ | 改良された熱放散及び製造容易性を持つ面照明のためのledベースの照明器具 |
US7828456B2 (en) * | 2007-10-17 | 2010-11-09 | Lsi Industries, Inc. | Roadway luminaire and methods of use |
DE202009002978U1 (de) * | 2009-03-04 | 2010-07-22 | Zumtobel Lighting Gmbh | Optisches Element für LED-Leuchten |
US8042968B2 (en) * | 2009-11-10 | 2011-10-25 | Lsi Industries, Inc. | Modular light reflectors and assemblies for luminaire |
-
2011
- 2011-10-28 EP EP11187042.4A patent/EP2587133B1/fr not_active Not-in-force
Non-Patent Citations (1)
Title |
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None * |
Also Published As
Publication number | Publication date |
---|---|
EP2587133A1 (fr) | 2013-05-01 |
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