EP4115120A1 - Système led sans dissipateur thermique - Google Patents
Système led sans dissipateur thermiqueInfo
- Publication number
- EP4115120A1 EP4115120A1 EP21709802.9A EP21709802A EP4115120A1 EP 4115120 A1 EP4115120 A1 EP 4115120A1 EP 21709802 A EP21709802 A EP 21709802A EP 4115120 A1 EP4115120 A1 EP 4115120A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- substrate
- overmolding
- heat
- sheath
- diodes
- 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
Links
- 239000000758 substrate Substances 0.000 claims abstract description 23
- 229910052751 metal Inorganic materials 0.000 claims abstract description 9
- 239000002184 metal Substances 0.000 claims abstract description 9
- 238000007789 sealing Methods 0.000 claims abstract description 4
- 229920000642 polymer Polymers 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
- 229910001092 metal group alloy Inorganic materials 0.000 claims description 3
- 239000004020 conductor Substances 0.000 claims description 2
- 229920001971 elastomer Polymers 0.000 claims description 2
- 239000000806 elastomer Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000017525 heat dissipation Effects 0.000 abstract 1
- 239000002966 varnish Substances 0.000 description 3
- 230000000295 complement effect Effects 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000002390 adhesive tape Substances 0.000 description 1
- 230000016571 aggressive behavior Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229920002313 fluoropolymer Polymers 0.000 description 1
- 239000004811 fluoropolymer Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 229920002725 thermoplastic elastomer Polymers 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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
- F21V29/85—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems characterised by the material
- F21V29/87—Organic material, e.g. filled polymer composites; Thermo-conductive additives or coatings therefor
-
- 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
- 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
- F21Y2105/00—Planar light sources
- F21Y2105/10—Planar light sources comprising a two-dimensional array of point-like light-generating elements
- F21Y2105/14—Planar light sources comprising a two-dimensional array of point-like light-generating elements characterised by the overall shape of the two-dimensional array
- F21Y2105/16—Planar light sources comprising a two-dimensional array of point-like light-generating elements characterised by the overall shape of the two-dimensional array square or rectangular, e.g. for light panels
-
- 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 present invention relates to a lighting system based on the technology of light emitting diode lamps responding to the horticultural and domestic or industrial lighting markets.
- Light-emitting diodes type CMS (Surface Mounted Component) or COB (Chip on printed circuit), constituting lighting systems, need to be protected, so as not to be in direct contact with the environment in which they operate.
- CMS Surface Mounted Component
- COB Chip on printed circuit
- the device overcomes these drawbacks by providing a lighting system that is both powerful, robust, durable and having a protection index of up to IP69, while keeping a cost of weak manufacturing.
- the principle of the invention is to use a heat-shrinkable sleeve, translucent or transparent and whose thermal conductivity is of the order of ten times that of air.
- a heat-shrinkable sleeve translucent or transparent and whose thermal conductivity is of the order of ten times that of air.
- We will slide into this sheath an insulated metal substrate in the form of a straight block, twice the length of the width and twice the width of the thickness.
- At least one light-emitting diode mounted on the surface, SMD or COB type, as well as a connector or power cable at the end, will have been deposited on one of the two larger faces beforehand. Once "retracted", the sock will be in direct contact with the diodes and the circuit, leaving no confined air.
- the material of the sheath will then make it possible to dissipate the heat of the circuit homogeneously, while protecting the latter from any external aggression and any human contact.
- the ends will then be overmolded, in order to make the system electrically waterproof, using a polymer.
- the overmolding may be made of elastomer and thus used to create a lip around the power connector, which will hug the complementary connector when it is inserted. This lip will make it possible to obtain a connection with a higher degree of protection than the bare connector, thus achieving cost savings.
- the substrate may have two recesses at its ends, passing through the thickness and located outside the area covered by the sheath, recesses that the overmolding will coat without closing off. These recesses make it possible to fix the device using screws or plastic clips.
- a second block of metal alloy the modulus of elasticity greater than the substrate and having two recesses corresponding to the recesses of the first block, can be glued against the latter, opposite the surface of the diodes, to the using a thermally conductive material, in order to make the system more rigid.
- FIG.l is a perspective view of the insulated metal substrate with a set of LEDs as well as a connector placed on one of the two larger faces.
- FIG.2 is a perspective view of the circuit coated with the heat-shrunk sheath and overmolded at the ends by the polymer.
- FIG.3 is a longitudinal sectional view of the lighting system showing the sealing lip around the connector.
- FIG.4 is a perspective view of the lighting system having an attachment recess at each end.
- FIG.5 is a longitudinal sectional view of the lighting system showing a second metal alloy pad bonded to the substrate.
- FIG.6 is a perspective view of the lighting system having a non-circular recess at each end.
- FIG.7 is a perspective view of two lighting systems fixed together with two supports.
- [fig.l] shows a device comprising an insulated metal substrate (1), on which is placed a connector (3) and a set of light emitting diodes mounted on the surface (2).
- [fig.2] we just insert the substrate (1) and the assembly of diodes (2) in a heat-shrinkable sheath (4), so as to eliminate the air trapped between the diodes and the sheath.
- An elastomeric overmolding (5) covers each of the two ends of the substrate (1) and of the sheath (4), as well as the connector (3) at one end, so as to protect and seal the assembly.
- the overmolding (5) around the connector (3) forms a circular lip (6), which will hug and compress around the complementary power connector, in order to increase the protection index of the bare connector.
- the overmolding (5) has a recess (7), smaller than the recess of the substrate, in order to come and coat it without blocking it and to allow thus fixing the device using clips or screws.
- a metal block (8) is glued to the back of the substrate (1) using a double-sided thermally conductive adhesive tape, before wrapping the device of the heat-shrinkable sheath and to overmold it at its ends, in order to increase the mechanical rigidity of the assembly.
- the recesses (9) are made during overmolding, around the fixing recesses (7), making it possible to prevent rotation between the lighting system and the retaining parts that will be clipped.
- An example of the assembly of two lighting systems is thus proposed [fig.7].
- the substrate made of aluminum, will have dimensions of the order of 500 millimeters in length, 30 millimeters in width and 1 millimeter in thickness.
- the metal block to increase rigidity will have the same dimensions and will be made of stainless steel.
- the diodes will be of type SMD2835, and will consume 20 watts as a whole.
- the connector shall be of the DC 5.5 x 2.1 millimeter type.
- the overmolding will consist of a thermoplastic elastomer to facilitate molding.
- the material used for the heat-shrinkable sleeve will be a fluoropolymer having a shrinkage temperature greater than 140 ° C, in order to remain stable under the temperature of the diodes which can reach 80 ° C. It can be translucent or transparent depending on the targeted application.
- the device according to the invention is particularly intended for domestic, industrial and horticultural lighting.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
- Led Device Packages (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR2002246A FR3107944B1 (fr) | 2020-03-05 | 2020-03-05 | Système LED sans dissipateur thermique |
PCT/IB2021/051511 WO2021176302A1 (fr) | 2020-03-05 | 2021-02-23 | Système led sans dissipateur thermique |
Publications (3)
Publication Number | Publication Date |
---|---|
EP4115120A1 true EP4115120A1 (fr) | 2023-01-11 |
EP4115120B1 EP4115120B1 (fr) | 2024-03-27 |
EP4115120C0 EP4115120C0 (fr) | 2024-03-27 |
Family
ID=70918603
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP21709802.9A Active EP4115120B1 (fr) | 2020-03-05 | 2021-02-23 | Système led sans dissipateur thermique |
Country Status (4)
Country | Link |
---|---|
US (1) | US11732880B2 (fr) |
EP (1) | EP4115120B1 (fr) |
FR (1) | FR3107944B1 (fr) |
WO (1) | WO2021176302A1 (fr) |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11480306B2 (en) * | 2008-09-05 | 2022-10-25 | Jiaxing Super Lighting Electric Appliance Co., Ltd. | LED tube lamp |
GB2497702B (en) * | 2009-08-20 | 2014-02-12 | Graviton Lite Ltd | Mounting for light emitting diode |
KR100997646B1 (ko) * | 2010-04-02 | 2010-12-01 | 루미리치 주식회사 | 발광다이오드 조명등 |
US20140009923A1 (en) * | 2012-07-06 | 2014-01-09 | Tan Chih Wu | Led tube lamp structure |
WO2014075002A1 (fr) * | 2012-11-12 | 2014-05-15 | A Zykin | Système de connexion spirit à del et procédé de fabrication |
WO2016039047A1 (fr) * | 2014-09-11 | 2016-03-17 | 富士フイルム株式会社 | Structure stratifiée, panneau tactile, dispositif d'affichage doté d'un panneau tactile, et procédé de fabrication associé |
FR3045777B1 (fr) * | 2015-12-22 | 2020-06-05 | Led-Ner | Filament led avec regulateur de courant et dispositif d'eclairage a filaments led |
DE102016012639B4 (de) * | 2016-10-24 | 2018-09-20 | Nicola Barthelme | Verkettbares, vollvergossenes, flexibles Leuchtdiodenband und Verfahren zu dessen Herstellung |
-
2020
- 2020-03-05 FR FR2002246A patent/FR3107944B1/fr not_active Expired - Fee Related
-
2021
- 2021-02-23 EP EP21709802.9A patent/EP4115120B1/fr active Active
- 2021-02-23 WO PCT/IB2021/051511 patent/WO2021176302A1/fr unknown
- 2021-02-23 US US17/908,251 patent/US11732880B2/en active Active
Also Published As
Publication number | Publication date |
---|---|
WO2021176302A1 (fr) | 2021-09-10 |
FR3107944A1 (fr) | 2021-09-10 |
US20230123362A1 (en) | 2023-04-20 |
EP4115120B1 (fr) | 2024-03-27 |
FR3107944B1 (fr) | 2022-02-11 |
US11732880B2 (en) | 2023-08-22 |
EP4115120C0 (fr) | 2024-03-27 |
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