IT201800001647A1 - Lighting device. - Google Patents
Lighting device. Download PDFInfo
- Publication number
- IT201800001647A1 IT201800001647A1 IT201800001647A IT201800001647A IT201800001647A1 IT 201800001647 A1 IT201800001647 A1 IT 201800001647A1 IT 201800001647 A IT201800001647 A IT 201800001647A IT 201800001647 A IT201800001647 A IT 201800001647A IT 201800001647 A1 IT201800001647 A1 IT 201800001647A1
- Authority
- IT
- Italy
- Prior art keywords
- led element
- transparent layer
- layer
- oxide
- interposed
- Prior art date
Links
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 13
- 230000005855 radiation Effects 0.000 claims description 7
- 239000000126 substance Substances 0.000 claims description 5
- 239000004408 titanium dioxide Substances 0.000 claims description 5
- 150000004645 aluminates Chemical class 0.000 claims description 4
- 150000004767 nitrides Chemical class 0.000 claims description 4
- 229920002635 polyurethane Polymers 0.000 claims description 4
- 239000004814 polyurethane Substances 0.000 claims description 4
- 150000004760 silicates Chemical class 0.000 claims description 4
- 229920000178 Acrylic resin Polymers 0.000 claims description 3
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- 239000000428 dust Substances 0.000 claims description 3
- 239000002105 nanoparticle Substances 0.000 claims description 3
- 229920005749 polyurethane resin Polymers 0.000 claims description 3
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 229910052725 zinc Inorganic materials 0.000 claims description 3
- 239000011701 zinc Substances 0.000 claims description 3
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 2
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical class [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 claims description 2
- 125000000956 methoxy group Chemical group [H]C([H])([H])O* 0.000 claims description 2
- 229920000570 polyether Polymers 0.000 claims description 2
- 229920001296 polysiloxane Polymers 0.000 claims description 2
- 239000002223 garnet Substances 0.000 claims 1
- 230000001681 protective effect Effects 0.000 claims 1
- 239000010410 layer Substances 0.000 description 13
- 229920005989 resin Polymers 0.000 description 5
- 239000011347 resin Substances 0.000 description 5
- -1 garnets Chemical class 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229910003074 TiCl4 Inorganic materials 0.000 description 1
- 229910010445 TiO2 P25 Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- XJDNKRIXUMDJCW-UHFFFAOYSA-J titanium tetrachloride Chemical compound Cl[Ti](Cl)(Cl)Cl XJDNKRIXUMDJCW-UHFFFAOYSA-J 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
- H01L33/52—Encapsulations
- H01L33/56—Materials, e.g. epoxy or silicone resin
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2933/00—Details relating to devices covered by the group H01L33/00 but not provided for in its subgroups
- H01L2933/0091—Scattering means in or on the semiconductor body or semiconductor body package
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
- H01L33/50—Wavelength conversion elements
- H01L33/501—Wavelength conversion elements characterised by the materials, e.g. binder
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Manufacturing & Machinery (AREA)
- Computer Hardware Design (AREA)
- Power Engineering (AREA)
- Luminescent Compositions (AREA)
- Liquid Crystal (AREA)
- Liquid Crystal Substances (AREA)
- Control Of Eletrric Generators (AREA)
Description
DESCRIZIONE dell'invenzione industriale dal titolo: "Dispositivo di illuminazione" DESCRIPTION of the industrial invention entitled: "Lighting device"
DESCRIZIONE DESCRIPTION
La presente invenzione si riferisce ad un dispositivo di illuminazione. The present invention refers to a lighting device.
Più in particolare, un tale dispositivo comprende: More specifically, such a device comprises:
- almeno un elemento LED che emette radiazioni luminose di lunghezza d’onda compresa fra 400 e 800 nm, e - at least one LED element that emits light radiation with a wavelength between 400 and 800 nm, e
- uno strato di resina trasparente protettivo contro polvere ed acqua. - a transparent resin layer that protects against dust and water.
Lo strato protettivo deve far raggiungere al dispositivo un grado compreso fra 66 e 68 della Classe IP (Indice Protezione) secondo la normativa UNI EN 60529. The protective layer must allow the device to reach a degree between 66 and 68 of the IP Class (Protection Index) according to the UNI EN 60529 standard.
La luce emessa dall’elemento LED è primariamente azzurra e quindi vira verso tonalità gialle attraversando sostanze luminescenti (denominate anche “fosfori”) associate all’elemento LED. The light emitted by the LED element is primarily blue and therefore turns towards yellow tones through luminescent substances (also called "phosphors") associated with the LED element.
Secondo una tecnica nota, il suddetto strato di resina trasparente è applicato direttamente sull’elemento LED. In questo caso, a causa della “bagnatura” dei fosfori da parte della resina liquida, si è constatato che durante l’attraversamento della resina trasparente si ha un viraggio da luce calda a luce fredda, che si traduce in un aumento della cosiddetta “temperatura di colore” del dispositivo. Come è noto, con tale espressione si intende la temperatura di un corpo nero che emette la radiazione cromaticamente più vicina possibile a quella in questione. Secondo la suddetta tecnica nota, si ha così un indesiderato aumento della “temperatura di colore” da valori di 2700-3000 °K a 3300-3700 °K. According to a known technique, the aforementioned transparent resin layer is applied directly to the LED element. In this case, due to the "wetting" of the phosphors by the liquid resin, it was found that during the crossing of the transparent resin there is a change from warm light to cold light, which results in an increase in the so-called "temperature color ”of the device. As is known, this expression means the temperature of a black body that emits the radiation that is chromatically closest to the one in question. According to the aforesaid known technique, there is thus an undesirable increase in the "color temperature" from values of 2700-3000 ° K to 3300-3700 ° K.
Scopo della presente invenzione è dunque quello di ovviare a tale inconveniente della tecnica nota. The aim of the present invention is therefore to obviate this drawback of the known art.
Secondo l’invenzione, tale scopo viene raggiunto grazie ad un dispositivo del tipo indicato all’inizio della presente descrizione e comprendente inoltre ossido di titanio, zinco e/o alluminio e/o una sostanza luminescente scelta nel gruppo consistente di alluminati, garnet, nitruri e silicati incorporati in uno strato a base di resina acrilica e/o poliuretanica indurita mediante radiazione UV interposto fra detto elemento LED e detto strato trasparente, oppure incorporati in detto strato trasparente che riveste direttamente detto elemento LED. According to the invention, this object is achieved thanks to a device of the type indicated at the beginning of the present description and further comprising titanium oxide, zinc and / or aluminum and / or a luminescent substance selected from the group consisting of aluminates, garnets, nitrides and silicates incorporated in a layer based on acrylic and / or polyurethane resin hardened by UV radiation interposed between said LED element and said transparent layer, or incorporated in said transparent layer which directly covers said LED element.
Nel dispositivo dell’invenzione non si verificano sostanzialmente fenomeni di viraggio da luce calda a luce fredda, cosicché la relativa “temperatura di colore” resta sostanzialmente invariata a valori corrispondenti a tonalità calde. In the device of the invention there are substantially no changes from warm light to cold light, so that the relative "color temperature" remains substantially unchanged at values corresponding to warm shades.
Tipicamente, la “temperatura di colore” del dispositivo dell’invenzione è compresa nell’intervallo fra 2700 e 3000 °K, ed è preferibilmente di circa 2800 °K. Typically, the "color temperature" of the device of the invention is in the range between 2700 and 3000 ° K, and is preferably about 2800 ° K.
Ulteriori vantaggi e caratteristiche della presente invenzione risulteranno evidenti dalla descrizione dettagliata che segue, fornita a titolo di esempio non limitativo con riferimento ai disegni annessi, in cui Further advantages and characteristics of the present invention will become evident from the detailed description which follows, provided by way of non-limiting example with reference to the annexed drawings, in which
la figura 1 è una rappresentazione schematica di un dispositivo dell’invenzione, visto in sezione, e Figure 1 is a schematic representation of a device of the invention, seen in section, and
la figura 2 è una rappresentazione schematica di una forma alternativa di dispositivo dell’invenzione, visto in sezione. Figure 2 is a schematic representation of an alternative form of device of the invention, seen in section.
Un dispositivo di illuminazione comprende (figura 1) un involucro 10 sagomato a guisa di canalina, in corrispondenza del cui fondo è disposto su di una base 12 un elemento LED 14. Quest’ultimo emette radiazioni luminose 16 di lunghezza d’onda compresa fra 400 e 800 nm. A lighting device comprises (Figure 1) a casing 10 shaped like a duct, at the bottom of which an LED element 14 is arranged on a base 12. This latter emits light radiations 16 with a wavelength between 400 and 800 nm.
L’elemento LED 14 è ricoperto da uno strato 18 a base di resina acrilica (o eventualmente poliuretanica) che è stata depositata a guisa di goccia e quindi indurita mediante radiazione UV. Lo strato 18 contiene inoltre ossido, in particolare biossido di titanio, sotto forma di nano-particelle avente dimensioni comprese fra 10 e 30 nm, che costituisce dallo 0,1 a 0,5 %, e preferibilmente lo 0,3 %, in peso dello strato 18. Ad esempio, nano-particelle adatte allo scopo, ottenute mediante pirolisi di TiCl4 in ambiente di ossigeno, sono commercializzate dalla società Evonik Industries AG sotto la denominazione AEROXIDE® TiO2 P25 (“hydrophilic fumed titanium dioxide” secondo la terminologia tecnica anglosassone). The LED element 14 is covered with a layer 18 based on acrylic resin (or possibly polyurethane) which has been deposited as a drop and then hardened by UV radiation. The layer 18 also contains oxide, in particular titanium dioxide, in the form of nano-particles having dimensions between 10 and 30 nm, which constitutes from 0.1 to 0.5%, and preferably 0.3%, by weight. of layer 18. For example, nano-particles suitable for the purpose, obtained by pyrolysis of TiCl4 in an oxygen environment, are marketed by the company Evonik Industries AG under the name AEROXIDE® TiO2 P25 ("hydrophilic fumed titanium dioxide" according to the Anglo-Saxon technical terminology ).
L’imboccatura dell’involucro 10 è chiusa da uno strato 20 di resina trasparente, ad esempio di tipo poliuretanico, siliconico o polietere/poliuretanico con terminazioni silossaniche Si(OCH3)3 (commercializzate sotto la denominazione Ms-Polymer®), che funge da protezione contro polvere ed acqua. The mouth of the casing 10 is closed by a layer 20 of transparent resin, for example of the polyurethane, silicone or polyether / polyurethane type with siloxane terminations Si (OCH3) 3 (marketed under the name Ms-Polymer®), which acts as a protection against dust and water.
La luce globalmente emessa dall’elemento LED 14 è gialla e resta tale pur passando attraverso gli strati 18 e 20. La “temperatura di colore” del dispositivo resta sostanzialmente invariata in un campo desiderato, preferibilmente compreso nell’intervallo fra 2700 e 3000 °K. The overall light emitted by the LED element 14 is yellow and remains yellow even though it passes through the layers 18 and 20. The "color temperature" of the device remains substantially unchanged in a desired range, preferably in the range between 2700 and 3000 ° K .
In altre forme di attuazione, lo strato 18 interposto fra l’elemento LED 14 e lo strato trasparente 20 potrebbe incorporare, in alternativa o in aggiunta al biossido di titanio, una sostanza luminescente scelta nel gruppo consistente di alluminati, garnet, nitruri e silicati, consentendo anche in questo caso di ottenere una sostanziale invarianza della “temperatura di colore” del dispositivo. In other embodiments, the layer 18 interposed between the LED element 14 and the transparent layer 20 could incorporate, alternatively or in addition to the titanium dioxide, a luminescent substance selected from the group consisting of aluminates, garnets, nitrides and silicates, allowing also in this case to obtain a substantial invariance of the "color temperature" of the device.
In una forma alternativa di attuazione del dispositivo dell’invenzione illustrata in figura 2, in cui numeri uguali a quelli utilizzati nella figura 1 contraddistinguono parti uguali o equivalenti, lo strato trasparente 20 riveste direttamente l’elemento LED 14 ed incorpora ossido di titanio, zinco e/o alluminio, in particolare biossido di titanio, e/o una sostanza luminescente scelta nel gruppo consistente di alluminati, garnet, nitruri e silicati. Anche in questo caso la “temperatura di colore” del dispositivo resta sostanzialmente invariata. In an alternative embodiment of the device of the invention illustrated in Figure 2, in which numbers equal to those used in Figure 1 distinguish equal or equivalent parts, the transparent layer 20 directly covers the LED element 14 and incorporates titanium oxide, zinc and / or aluminum, in particular titanium dioxide, and / or a luminescent substance selected from the group consisting of aluminates, garnets, nitrides and silicates. Also in this case the "color temperature" of the device remains substantially unchanged.
Naturalmente, fermo restando il principio dell'invenzione, i particolari di realizzazione e le forme di attuazione potranno ampiamente variare rispetto a quanto descritto a puro titolo esemplificativo, senza per questo uscire dall’ambito dell’invenzione come definito nelle rivendicazioni annesse. Of course, without prejudice to the principle of the invention, the details of construction and the embodiments may vary widely with respect to what is described purely by way of example, without thereby departing from the scope of the invention as defined in the attached claims.
Claims (7)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT201800001647A IT201800001647A1 (en) | 2018-01-23 | 2018-01-23 | Lighting device. |
| PCT/IB2019/050475 WO2019145838A1 (en) | 2018-01-23 | 2019-01-21 | Lighting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT201800001647A IT201800001647A1 (en) | 2018-01-23 | 2018-01-23 | Lighting device. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| IT201800001647A1 true IT201800001647A1 (en) | 2019-07-23 |
Family
ID=62002297
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IT201800001647A IT201800001647A1 (en) | 2018-01-23 | 2018-01-23 | Lighting device. |
Country Status (2)
| Country | Link |
|---|---|
| IT (1) | IT201800001647A1 (en) |
| WO (1) | WO2019145838A1 (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110255265A1 (en) * | 2008-10-22 | 2011-10-20 | General Electric Company | Phosphor materials and related devices |
| US20120138874A1 (en) * | 2010-12-02 | 2012-06-07 | Intematix Corporation | Solid-state light emitting devices and signage with photoluminescence wavelength conversion and photoluminescent compositions therefor |
| WO2015001507A1 (en) * | 2013-07-03 | 2015-01-08 | S.E. Special Engines S.R.L. | Lighting device |
-
2018
- 2018-01-23 IT IT201800001647A patent/IT201800001647A1/en unknown
-
2019
- 2019-01-21 WO PCT/IB2019/050475 patent/WO2019145838A1/en active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110255265A1 (en) * | 2008-10-22 | 2011-10-20 | General Electric Company | Phosphor materials and related devices |
| US20120138874A1 (en) * | 2010-12-02 | 2012-06-07 | Intematix Corporation | Solid-state light emitting devices and signage with photoluminescence wavelength conversion and photoluminescent compositions therefor |
| WO2015001507A1 (en) * | 2013-07-03 | 2015-01-08 | S.E. Special Engines S.R.L. | Lighting device |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2019145838A1 (en) | 2019-08-01 |
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