EP2656117A1 - Led (light emitting diode) luminous source module - Google Patents

Led (light emitting diode) luminous source module

Info

Publication number
EP2656117A1
EP2656117A1 EP11802711.9A EP11802711A EP2656117A1 EP 2656117 A1 EP2656117 A1 EP 2656117A1 EP 11802711 A EP11802711 A EP 11802711A EP 2656117 A1 EP2656117 A1 EP 2656117A1
Authority
EP
European Patent Office
Prior art keywords
emitting diode
source module
led
optical element
derivatives
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Withdrawn
Application number
EP11802711.9A
Other languages
German (de)
French (fr)
Inventor
Pierre-Yves Lahary
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.)
Cerdia Produktions GmbH
Original Assignee
Solvay Acetow GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Solvay Acetow GmbH filed Critical Solvay Acetow GmbH
Publication of EP2656117A1 publication Critical patent/EP2656117A1/en
Withdrawn legal-status Critical Current

Links

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
    • H01L33/58—Optical field-shaping elements
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L1/00—Compositions of cellulose, modified cellulose or cellulose derivatives
    • C08L1/02—Cellulose; Modified cellulose
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L3/00—Compositions of starch, amylose or amylopectin or of their derivatives or degradation products
    • C08L3/02—Starch; Degradation products thereof, e.g. dextrin
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L5/00—Compositions of polysaccharides or of their derivatives not provided for in groups C08L1/00 or C08L3/00
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L5/00—Compositions of polysaccharides or of their derivatives not provided for in groups C08L1/00 or C08L3/00
    • C08L5/04—Alginic acid; Derivatives thereof
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L5/00—Compositions of polysaccharides or of their derivatives not provided for in groups C08L1/00 or C08L3/00
    • C08L5/06—Pectin; Derivatives thereof
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L5/00—Compositions of polysaccharides or of their derivatives not provided for in groups C08L1/00 or C08L3/00
    • C08L5/08—Chitin; Chondroitin sulfate; Hyaluronic acid; Derivatives thereof
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G02B1/04—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of organic materials, e.g. plastics
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L25/00—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof
    • H01L25/03—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes
    • H01L25/04—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers
    • H01L25/075—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group H01L33/00
    • 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

Definitions

  • the present invention relates to a polymeric optical element such as a lens for an LED light source module (LED), and in particular an LED light source module comprising this optical element, and an LED lamp. including this module.
  • LED LED light source module
  • LED lamp LED lamp
  • Light emitting diode lighting devices are known (generally designated by LED or LED). Such diodes have a long life, have low consumption and do not produce excessive heat.
  • white LEDs increasingly powerful and powerful in terms of brightness, which can be substituted for incandescent or halogen lamps.
  • LED lamps generally comprise one or more LED chips (light emitting diode), and an optical system comprising one or more optical elements such as lenses. These optical elements are generally transparent, glass or polymeric material. The optical system notably makes it possible to optimize the transmission of the light generated by the LED chip (s). We are always looking for new high performance materials.
  • the present invention proposes, in a first object, an optical element such as a lens for LED light source module (light emitting diode), the optical element comprising at least one polymer chosen from polymers. cellulose and its derivatives, starch and its derivatives, alginates and their derivatives, guars and their derivatives, chitin and its derivatives, pectin and its derivatives.
  • the invention provides an LED light source module (light emitting diode) comprising an optical system with at least one optical element as described above.
  • the invention provides an LED lamp (light emitting diode) comprising this module.
  • the invention relates first of all to a polymeric optical element for LED light source module (light emitting diode).
  • the polymer of the optical element may for example be one of the following polymers: cellulose, cellulose acetate, cellulose propionate, cellulose butyrate, cellulose triacetate, ethylcellulose , hydroxyethylcellulose, methylcellulose, hydroxymethylcellulose, starch, hydroxypropyl starch, starch acetate, starch propionate, starch butyrate or mixed starch esters, gum arabic, agar-agar, alginic acid, sodium alginate, potassium alginate, calcium alginate, gum tragacanth, guar gum, locust bean gum.
  • the polymer may be a derivative of cellulose, for example cellulose acetate, cellulose propionate, cellulose butyrate, cellulose triacetate, ethylcellulose, hydroxyethylcellulose or methylcellulose. hydroxymethylcellulose.
  • the cellulose derivative is obtained from cellulose derived from high quality wood pulp, or from cellulose from the cotton interlinter.
  • high quality wood pulp is meant a wood pulp comprising at least 95% by weight of alpha cellulose.
  • the amount of alpha cellulose is determined according to the ISO 692 standard.
  • the cellulose resulting from the cotton linter it is preferably an acetate grade.
  • the polymer may be a cellulose ester. It is generally organic esters and in particular aliphatic esters.
  • the cellulose ester has an acyl group having 2 to 4 carbon atoms as an ester group. It can be mixed esters of cellulose. Examples of suitable cellulose esters in the context of the invention are: cellulose acetate, cellulose propionate, cellulose butyrate, cellulose acetate propionate, cellulose acetatobutyrate, acetatophthalate cellulose, acetate propionate butyrate cellulose.
  • the butyryl group forming the butyrate may be linear or branched.
  • the degree of substitution of the cellulose is between 2 and 3, preferably between 2.3 and 2.9.
  • the degree of substitution of the cellulose is determined according to ASTM D871-72
  • the intrinsic viscosity of the polymer of the invention is advantageously between 0.3 and 0.4, preferably between 0.32 and 0.35. Intrinsic viscosity is measured according to ASTM D871-72.
  • the polymer of the optical element may be a mixture of several polymers.
  • the polymer is cellulose acetate.
  • the optical element advantageously comprises at least 50% by weight of polymer, preferably at least 55% by weight.
  • the optical element comprises a plasticizer.
  • a plasticizer By way of example of a plasticizer, mention may be made of triacetin, diethyl phthalate, dimethyl phthalate, butyl phthalyl butyl glycolate, diethyl citrate, dimethoxy ethyl phthalate, ethyl phthalyl ethyl glycolate and methyl phthalyl ethyl.
  • glycolate the sulfonamides n-ethyl-o, p-toluene, triphenyl phosphate, tricresyl phosphate, dibutoxy ethyl phthalate, diamyl phthalate, tributyl citrate, tributyl acetyl citrate, tripropyl acetyl citrate, tripropionine, tributyrin, o-sulfonamide, p-toluene, pentaerythritol tetraacetate, dibutyl tartrate, diethylene glycol diacetate, diethylene glycol dipropionate, dibutyl adipate, dioctyl adipate, dibutyl azelate, trichloroethyl phosphate, tributyl phosphate, di-n-butyl sebacate, dibutyl phthalate, dioctyl phthalate, butylbenz
  • the optical element comprises a thermal stabilizer (thermal degradation and / or thermooxidative protector) such as an antioxidant.
  • thermal stabilizers mention may be made of glycidyl ethers, metal salts of weak acids and phenols. substituted, etc.
  • antioxidants examples include hindered phenolic antioxidants. Such antioxidants are for example described in patent applications WO 2004/000921 and WO02 / 053633. Irganox 1076® (octadecyl 3,5-di-tert-butyl-r-hydroxyhydrocinnamate) and Nrganox 1010® (tetrakis (methylene (3,5-di-tert-butyl-4-hydroxyhydrocinnamate) methane) are examples. such antioxidants.
  • Irganox 1076® octadecyl 3,5-di-tert-butyl-r-hydroxyhydrocinnamate
  • Nrganox 1010® tetrakis (methylene (3,5-di-tert-butyl-4-hydroxyhydrocinnamate) methane
  • the optical element comprises a light stabilizer.
  • light stabilizers By way of examples of light stabilizers, mention may be made of stabilizers having at least one hindered amine unit (Hindered Amine Light Stabilizer H.A.L.S.). Such additives are for example described in patent applications WO 2004/000921 and WO2005 / 040262.
  • UV absorbers may also be mentioned. Such UV absorbers are described in particular in patent application WO 2004/000921.
  • oxanilides benzophenones such as Uvinul 400® (2,4-dihydroxybenzophenone), benzotriazoles such as Tinuvin 360® (dimeric 2-hydroxyphenylbenzotriazole) or 2, 2'-methylenebis (6- (2H-benzotriazol-2-yl) -4-1, 1, 3,3-tetramethylbutyl) phenol, 2-hydroxyphenyltriazines such as Tinuvin 1577FF® (2,4-Diphenyl- 6- (2-hydroxy-4-hexyloxyphenyl) -s-triazine, Tinuvin 234® (2- (2H-benzzotriazol-2-yl) 4,6-bis (1-ethyl-1-phenylethylphenol).
  • the optical element may also comprise one or more additives chosen from fillers, dyes, pigments, antistatic agents, surfactants, lubricants, dispersing agents, flame retardants, aid additives or molding. , shock modifiers. This list is not exhaustive.
  • the optical element is an object / article obtained by shaping the constituent (s) constitutive (s) of the optical element. It may be for example articles selected from the group consisting of injected or molded parts.
  • the optical element has a thickness of between 0.4 and 40 mm, preferably between 1 and 30 mm, even more preferably between 2 and 25 mm.
  • the optical element is advantageously a lens. It can be a Fresnel lens. It can be convex or concave. Preferably the optical element of the invention is optically transparent, that is to say it has a light transmittance of at least 88% according to ASTM D1003.
  • the optical element may be prepared according to any known method for preparing an optical element, in particular a lens.
  • granules consisting of (the) constituent compound (s) of the optical element, for example by extrusion in the form of rods, the polymer or a composition comprising the polymer constituent of the optical element; rushes which are then cut to form granules.
  • Additives such as plasticizers, stabilizers etc. can be introduced at different locations of the extrusion device, for example at different locations of a twin-screw extruder.
  • the granules can then be introduced into a processing and shaping device, such as a molding, injection molding, extrusion, casting molding, etc.
  • the invention also relates to an LED light source module (light emitting diode) comprising an optical system having at least one optical element as described above.
  • This LED light source module (light emitting diode) comprises:
  • At least one LED chip encapsulated in an encapsulating material such as an epoxy resin
  • At least one optical system comprising at least one optical element as described above
  • LED light source modules light emitting diode
  • the LED chip (light emitting diode) of the LED light source module of the invention may be any chip that emits in the visible, ultraviolet or infrared.
  • the structure of the LED chip comprises a layer of semiconductor material.
  • the LED chip may comprise layers of semiconductor material of columns III and IV of the periodic table of elements, such as GaAs, GaAlAs, GaN, InGaN, GaP, etc., or layers of semiconductor material of the columns.
  • II to VI of the periodic table of elements such as ZnSe, ZnSSe, CdTe, etc., or semiconductor material layers of columns IV and V of the periodic table of elements, such as SiC.
  • the LED chip may also include other layers.
  • the LED light source module (light emitting diode) of the invention may comprise a plurality of LED chips.
  • the structure of optical systems LED light source modules (light emitting diode) is known to those skilled in the art. It can be complex and varied.
  • the optical system allows in particular to optimize the transmission of light generated by the LED chip (s) of the module.
  • the optical system comprises at least one optical element. It can include a combination of several optical elements.
  • the optical system can have different shapes and different arrangements. These shapes and arrangements are known to those skilled in the art.
  • the optical element is a lens that covers the LED chip. It can for example be in the form of ball, dome etc.
  • the optical element is a collimator, a collector or a divergent.
  • a collimator is an optical element that concentrates the luminous flux.
  • the invention finally relates to an LED lamp (light emitting diode) comprising at least the LED light source module of the invention.
  • the lamp also comprises a bulb or a basin covering the LED light source module.
  • This bulb or this basin usually has a protective role of the LED light source module.
  • the bulb can be of different shapes. It can for example be round, curved, cylindrical, etc.
  • the ampoule or vessel preferably comprises at least one polymer chosen from the following polymers: cellulose and its derivatives, starch and its derivatives, alginates and their derivatives, guars and their derivatives, chitin and its derivatives, pectin and its derivatives. All that has been described above on the polymer of the optical element applies here for the bulb or the basin.
  • the optical element of the invention has very good properties for its application in LED light source modules. Indeed, it is transparent (it has a transmittance to high light), lighter than glass, and it has good mechanical properties, in terms of particular module. It can be obtained in various sizes and shapes, and is suitable for mass production. Another advantage of the optical element of the invention is that it is made of a biobased material.
  • Example 1 Plasticized cellulose acetate discs for an optical element in an LED light source module were prepared in this example.
  • a cellulose acetate of degree of substitution 2.45 and intrinsic viscosity 0.342 according to the ASTM D871-72 standard was plasticized by 30% by weight of triacetin marketed by Eastman, in extrusion.
  • This material was prepared under the following conditions.
  • the cellulose acetate powder was introduced through the feed hopper and the liquid plasticizer (triacetin) was introduced at the beginning of the screw by a specific feed channel.
  • the implementation conditions applied are the following:
  • plasticized cellulose acetate rod was granulated.
  • the granules thus prepared were then shaped by injection molding with an Arburg 350-90® press (35-tonne mold closing force).
  • Disks of plasticized cellulose acetate 85 mm in diameter and 3 mm thick were obtained under the following conditions:
  • a Konica Minolta CM-5® spectrophotometer was then used to measure the transmittance according to ASTM D1003. A 94.3% transmittance at 700 nm was obtained for this 3 mm thick sample.
  • Example 2 In this example, a CAB 381-2® cellulose butyrate acetate marketed by Eastman was plasticized with 10% by weight of triacetin marketed by Aldrich. The following additives have been added to the formulation:
  • Irganox ® 1010 tetrakis (methylene (3,5-di- (tert) -butyl-4-hydrocinnamate)) methane
  • Ciba tetrakis (methylene (3,5-di- (tert) -butyl-4-hydrocinnamate) methane
  • Irgafos ® 168 tris- (2,4-di-tert-butylphenyl) phosphite
  • UV absorber o 0.3% by weight of Tinuvin ® 234 (2- (2H-benzzotriazol-2-yl) 4,6-bis (1-ethyl-1- phenylethylphenol) (marketed by the company Ciba).

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Power Engineering (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Manufacturing & Machinery (AREA)
  • Optics & Photonics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Led Device Packages (AREA)

Abstract

Polymeric optical lens for LED (light‑emitting diode) luminous source module, in particular a LED luminous source module comprising this optical lens, and an LED lamp comprising this module. Optical lens for LED (light‑emitting diode) luminous source module comprising a polymer chosen from among cellulose and its derivatives, starch and its derivatives, alginates and their derivatives, guars and their derivatives, chitin and its derivatives, pectin and its derivatives.

Description

MODULE DE SOURCE LUMINEUSE A LED (DIODE  LED LIGHT SOURCE MODULE (DIODE
ELECTROLUMINESCENTE) [0001] La présente invention concerne un élément optique polymérique tel qu'une lentille pour module de source lumineuse à LED (diode électroluminescente), et en particulier un module de source lumineuse à LED comportant cet élément optique, et une lampe à LED comprenant ce module. [0002] On connaît des dispositifs d'éclairage à diodes électroluminescentes (généralement désignées par DEL ou LED). De telles diodes présentent une grande durée de vie, présentent une faible consommation et ne produisent pas une chaleur excessive. [0003] Il existe en particulier, depuis peu, des LED blanches de plus en plus performantes et puissantes, en termes de luminosité, qui peuvent se substituer aux lampes à incandescence ou halogènes.  The present invention relates to a polymeric optical element such as a lens for an LED light source module (LED), and in particular an LED light source module comprising this optical element, and an LED lamp. including this module. Light emitting diode lighting devices are known (generally designated by LED or LED). Such diodes have a long life, have low consumption and do not produce excessive heat. In particular, recently, there are white LEDs increasingly powerful and powerful in terms of brightness, which can be substituted for incandescent or halogen lamps.
[0004] Les lampes à LED comprennent généralement une ou plusieurs puces à LED (diode électroluminescente), et un système optique comprenant un ou plusieurs éléments optiques tels que des lentilles. Ces éléments optiques sont généralement transparents, en verre ou en matériau polymérique. Le système optique permet notamment d'optimiser la transmission de la lumière générée par la (les) puce(s) à LED. [0005] On est toujours à la recherche de nouveaux matériaux performants. LED lamps generally comprise one or more LED chips (light emitting diode), and an optical system comprising one or more optical elements such as lenses. These optical elements are generally transparent, glass or polymeric material. The optical system notably makes it possible to optimize the transmission of the light generated by the LED chip (s). We are always looking for new high performance materials.
[0006] A cet effet, la présente invention propose, dans un premier objet, un élément optique tel qu'une lentille pour module de source lumineuse à LED (diode électroluminescente), l'élément optique comprenant au moins un polymère choisi parmi les polymères suivants : la cellulose et ses dérivés, l'amidon et ses dérivés, les alginates et leurs dérivés, les guars et leurs dérivés, la chitine et ses dérivés, la pectine et ses dérivés. For this purpose, the present invention proposes, in a first object, an optical element such as a lens for LED light source module (light emitting diode), the optical element comprising at least one polymer chosen from polymers. cellulose and its derivatives, starch and its derivatives, alginates and their derivatives, guars and their derivatives, chitin and its derivatives, pectin and its derivatives.
[0007] Dans un second objet, l'invention propose un module de source lumineuse à LED (diode électroluminescente) comprenant un système optique avec au moins un élément optique tel que décrit ci-dessus. [0008] Enfin, dans un troisième objet, l'invention propose une lampe à LED (diode électroluminescente) comprenant ce module. [0009] L'invention concerne tout d'abord un élément optique polymérique pour module de source lumineuse à LED (diode électroluminescente). In a second object, the invention provides an LED light source module (light emitting diode) comprising an optical system with at least one optical element as described above. Finally, in a third object, the invention provides an LED lamp (light emitting diode) comprising this module. The invention relates first of all to a polymeric optical element for LED light source module (light emitting diode).
[0010] Le polymère de l'élément optique peut par exemple être l'un des polymères ci-après : la cellulose, l'acétate de cellulose, le propionate de cellulose, le butyrate de cellulose, le triacétate de cellulose, l'éthylcellulose, l'hydroxyéthylcellulose, la méthylcellulose, l'hydroxyméthylcellulose, l'amidon, l'hydroxypropyle d'amidon, l'acétate d'amidon, le propionate d'amidon, le butyrate d'amidon ou des esters mixtes d'amidon, la gomme arabique, l'agar-agar, l'acide alginique, l'alginate de sodium, l'alginate de potassium, l'alginate de calcium, la gomme adragante, la gomme guar, la gomme de caroube. The polymer of the optical element may for example be one of the following polymers: cellulose, cellulose acetate, cellulose propionate, cellulose butyrate, cellulose triacetate, ethylcellulose , hydroxyethylcellulose, methylcellulose, hydroxymethylcellulose, starch, hydroxypropyl starch, starch acetate, starch propionate, starch butyrate or mixed starch esters, gum arabic, agar-agar, alginic acid, sodium alginate, potassium alginate, calcium alginate, gum tragacanth, guar gum, locust bean gum.
[001 1] En particulier le polymère peut être un dérivé de la cellulose, par exemple, l'acétate de cellulose, le propionate de cellulose, le butyrate de cellulose, le triacétate de cellulose, l'éthylcellulose, l'hydroxyéthylcellulose, la méthylcellulose, l'hydroxyméthylcellulose. In particular, the polymer may be a derivative of cellulose, for example cellulose acetate, cellulose propionate, cellulose butyrate, cellulose triacetate, ethylcellulose, hydroxyethylcellulose or methylcellulose. hydroxymethylcellulose.
[0012] Selon un mode de réalisation particulier de l'invention, le dérivé de cellulose est obtenu à partir de cellulose issue de pulpe de bois de qualité supérieure, ou à partir de cellulose issue de linter de coton. Par « pulpe de bois de qualité supérieure », on entend une pulpe de bois comprenant au moins 95% en poids d'alpha cellulose. La quantité d'alpha cellulose est déterminée selon la norme ISO 692. En ce qui concerne la cellulose issue de linter de coton, il s'agit de préférence d'un grade acétate. [0013] Plus particulièrement le polymère peut être un ester de cellulose. Il s'agit généralement d'esters organiques et notamment aliphatiques. According to a particular embodiment of the invention, the cellulose derivative is obtained from cellulose derived from high quality wood pulp, or from cellulose from the cotton interlinter. By "high quality wood pulp" is meant a wood pulp comprising at least 95% by weight of alpha cellulose. The amount of alpha cellulose is determined according to the ISO 692 standard. As regards the cellulose resulting from the cotton linter, it is preferably an acetate grade. More particularly, the polymer may be a cellulose ester. It is generally organic esters and in particular aliphatic esters.
[0014] Avantageusement l'ester de cellulose a un groupe acyl ayant de 2 à 4 atomes de carbone comme groupe ester. Il peut s'agir d'esters mixtes de cellulose. On peut citer à titre d'exemple d'ester de cellulose convenable dans le cadre de l'invention : l'acétate de cellulose, le propionate de cellulose, le butyrate de cellulose, l'acétatopropionate de cellulose, l'acétatobutyrate de cellulose, l'acétatophtalate de cellulose, l'acétate propionate butyrate de cellulose. Le groupe butyrile formant le butyrate peut être linéaire ou branché. Advantageously, the cellulose ester has an acyl group having 2 to 4 carbon atoms as an ester group. It can be mixed esters of cellulose. Examples of suitable cellulose esters in the context of the invention are: cellulose acetate, cellulose propionate, cellulose butyrate, cellulose acetate propionate, cellulose acetatobutyrate, acetatophthalate cellulose, acetate propionate butyrate cellulose. The butyryl group forming the butyrate may be linear or branched.
[0015] Avantageusement le degré de substitution de la cellulose est compris entre 2 et 3, de préférence entre 2,3 et 2,9. Le degré de substitution de la cellulose est déterminé selon la norme ASTM D871-72 [0015] Advantageously, the degree of substitution of the cellulose is between 2 and 3, preferably between 2.3 and 2.9. The degree of substitution of the cellulose is determined according to ASTM D871-72
[0016] La viscosité intrinsèque du polymère de l'invention est avantageusement compris entre 0,3 et 0,4, de préférence comprise entre 0,32 et 0,35. La viscosité intrinsèque est mesurée selon la norme ASTM D871-72. The intrinsic viscosity of the polymer of the invention is advantageously between 0.3 and 0.4, preferably between 0.32 and 0.35. Intrinsic viscosity is measured according to ASTM D871-72.
[0017] Le polymère de l'élément optique peut être un mélange de plusieurs polymères. [0018] De manière préférée, le polymère est l'acétate de cellulose. The polymer of the optical element may be a mixture of several polymers. [0018] Preferably, the polymer is cellulose acetate.
[0019] L'élément optique comprend avantageusement au moins 50% en poids de polymère, de préférence au moins 55% en poids. [0020] Selon un mode de réalisation particulier de l'invention, l'élément optique comprend un plastifiant. A titre d'exemple de plastifiant, on peut citer la triacétine, le phtalate de diéthyle, le phtalate de diméthyle, le butyl phtalyl butyl glycolate, le diéthyl citrate, le diméthoxy éthyl phtalate, l'éthyl phtalyl éthyl glycolate, le méthyl phtalyl éthyl glycolate, les sulfonamides n-éthyl-o,p-toluène, le phosphate de triphényle, le tricrésyl phosphate, le dibutoxy éthyl phtalate, le diamyl phtalate, le tributyl citrate, le tributyle acétyle citrate, le tripropyle acétyle citrate, la tripropionine, la tributyrine, la sulfonamide ο,ρ-toluène, le pentaerythritol tetraacétate, le dibutyl tartrate, le diéthylène glycol diacétate, le diéthylène glycol dipropionate, l'adipate de dibutyle, l'adipate de dioctyle, l'azélate de dibutyle, le phosphate trichloroéthyle, le phosphate de tributyle, le sébacate de di-n-butyle, le phtalate de dibutyle, le phtalate de dioctyle, le phtalate de butylbenzyle, le 2-éthylhexyl adipate, le di-2-ethylhexyl phtalate. La quantité de plastifiant est avantageusement comprise entre 10 et 45% en poids par rapport au poids de l'élément optique, de préférence comprise entre 20 et 40% en poids. [0021] Selon un mode de réalisation particulier de l'invention, l'élément optique comprend un stabilisant thermique (protecteur de dégradation thermique et/ou thermooxydante) tel qu'un antioxydant. A titre d'exemple de stabilisants thermiques, on peut citer les glycidyl éthers, les sels métalliques d'acides faibles, les phénols substitués, etc. En particulier on peut citer les mono ou diglycidyl éthers d'hydroquinone, l'oxalate de potassium, le naphthénate de strontium, le resorcinol diglycidyl éther.le formate de magnésium ou d'aluminium, la magnésie, etc. [0022] A titre d'exemple d'anti-oxydants, on peut citer les antioxydants phénoliques encombrés. De tels anti-oxydants sont par exemple décrits dans les demandes de brevet WO 2004/000921 et WO02/053633. L'Irganox 1076® (octadecyl 3,5-di-tert-butyl- r-hydroxyhydrocinnamate) et Nrganox 1010® (tetrakis(methylene(3,5-di-tert-butyl-4- hydroxyhydrocinnamate)methane)) sont des exemples de tels anti-oxydants. The optical element advantageously comprises at least 50% by weight of polymer, preferably at least 55% by weight. According to a particular embodiment of the invention, the optical element comprises a plasticizer. By way of example of a plasticizer, mention may be made of triacetin, diethyl phthalate, dimethyl phthalate, butyl phthalyl butyl glycolate, diethyl citrate, dimethoxy ethyl phthalate, ethyl phthalyl ethyl glycolate and methyl phthalyl ethyl. glycolate, the sulfonamides n-ethyl-o, p-toluene, triphenyl phosphate, tricresyl phosphate, dibutoxy ethyl phthalate, diamyl phthalate, tributyl citrate, tributyl acetyl citrate, tripropyl acetyl citrate, tripropionine, tributyrin, o-sulfonamide, p-toluene, pentaerythritol tetraacetate, dibutyl tartrate, diethylene glycol diacetate, diethylene glycol dipropionate, dibutyl adipate, dioctyl adipate, dibutyl azelate, trichloroethyl phosphate, tributyl phosphate, di-n-butyl sebacate, dibutyl phthalate, dioctyl phthalate, butylbenzyl phthalate, 2-ethylhexyl adipate, di-2-ethylhexyl phthalate. The amount of plasticizer is advantageously between 10 and 45% by weight relative to the weight of the optical element, preferably between 20 and 40% by weight. According to a particular embodiment of the invention, the optical element comprises a thermal stabilizer (thermal degradation and / or thermooxidative protector) such as an antioxidant. By way of example of thermal stabilizers, mention may be made of glycidyl ethers, metal salts of weak acids and phenols. substituted, etc. In particular mention may be made of hydroquinone mono- or diglycidyl ethers, potassium oxalate, strontium naphthenate, resorcinol diglycidyl ether, magnesium or aluminum formate, magnesia, and the like. Examples of antioxidants include hindered phenolic antioxidants. Such antioxidants are for example described in patent applications WO 2004/000921 and WO02 / 053633. Irganox 1076® (octadecyl 3,5-di-tert-butyl-r-hydroxyhydrocinnamate) and Nrganox 1010® (tetrakis (methylene (3,5-di-tert-butyl-4-hydroxyhydrocinnamate) methane) are examples. such antioxidants.
[0023] A titre d'exemple d'anti-oxydants, on peut également citer les stabilisants phosphorés, tels que les phosphites substitués par des radicaux alkyles et/ou aryles, par exemple Nrgafos 168® (tris-(2,4-di-tert-butylphényl) phosphite). [0024] Selon un mode de réalisation particulier de l'invention, l'élément optique comprend un stabilisant à la lumière. By way of example of antioxidants, mention may also be made of phosphorus stabilizers, such as phosphites substituted with alkyl and / or aryl radicals, for example Nrgafos 168® (tris- (2,4-di -tert-butylphenyl) phosphite). According to a particular embodiment of the invention, the optical element comprises a light stabilizer.
[0025] A titre d'exemples de stabilisants à la lumière on peut citer les stabilisants présentant au moins un motif aminé encombrée (Hindered Aminé Light Stabilizer H.A.L.S.). De tels additifs sont par exemple décrits dans les demandes de brevet WO 2004/000921 et W02005/040262. By way of examples of light stabilizers, mention may be made of stabilizers having at least one hindered amine unit (Hindered Amine Light Stabilizer H.A.L.S.). Such additives are for example described in patent applications WO 2004/000921 and WO2005 / 040262.
[0026] A titre d'exemples de stabilisants à la lumière, on peut également citer les absorbeurs UV. De tels absorbeurs UV sont notamment décrits dans la demande de brevet WO 2004/000921. On peut citer à titre d'exemple d'absorbeur UV les oxanilides, les benzophénones tels que l'Uvinul 400® (2,4-dihydroxybenzophénone), les benzotriazoles tels que le Tinuvin 360® (dimeric 2-hydroxyphenylbenzotriazole) ou le 2,2'-methylenebis(6-(2H-benzotriazol-2-yl)-4-1 , 1 ,3,3-tetramethylbutyl)phenol, les 2- hydroxy-phenyltriazines telles que le Tinuvin 1577FF® (2,4-Diphényl-6-(2-hydroxy-4- hexyloxyphenyl)-s-triazine, le Tinuvin 234® (2-(2H-benzzotriazol-2-yl)4,6-bis(1-ethyl-1- phenylethylphenol). As examples of light stabilizers, UV absorbers may also be mentioned. Such UV absorbers are described in particular in patent application WO 2004/000921. By way of example of an UV absorber, mention may be made of oxanilides, benzophenones such as Uvinul 400® (2,4-dihydroxybenzophenone), benzotriazoles such as Tinuvin 360® (dimeric 2-hydroxyphenylbenzotriazole) or 2, 2'-methylenebis (6- (2H-benzotriazol-2-yl) -4-1, 1, 3,3-tetramethylbutyl) phenol, 2-hydroxyphenyltriazines such as Tinuvin 1577FF® (2,4-Diphenyl- 6- (2-hydroxy-4-hexyloxyphenyl) -s-triazine, Tinuvin 234® (2- (2H-benzzotriazol-2-yl) 4,6-bis (1-ethyl-1-phenylethylphenol).
[0027] L'élément optique peut également comprendre un ou plusieurs additifs choisis parmi les charges, les colorants, les pigments, les agents antistatiques, les surfactants, les lubrifiants, les agents dispersants, les agents ignifugeants, les additifs d'aide ou moulage, les modificateurs de choc. Cette liste n'est pas limitative. [0028] L'élément optique est un objet/article, obtenu par mise en forme du(des) composé(s) constitutif(s) de l'élément optique. Il peut s'agir par exemple d'articles choisis dans le groupe constitué des pièces injectées ou moulées. Avantageusement l'élément optique présente une épaisseur comprise entre 0,4 et 40 mm, de préférence comprise entre 1 et 30 mm, encore plus préférentiellement entre 2 et 25 mm. The optical element may also comprise one or more additives chosen from fillers, dyes, pigments, antistatic agents, surfactants, lubricants, dispersing agents, flame retardants, aid additives or molding. , shock modifiers. This list is not exhaustive. The optical element is an object / article obtained by shaping the constituent (s) constitutive (s) of the optical element. It may be for example articles selected from the group consisting of injected or molded parts. Advantageously, the optical element has a thickness of between 0.4 and 40 mm, preferably between 1 and 30 mm, even more preferably between 2 and 25 mm.
[0029] L'élément optique est avantageusement une lentille. Il peut s'agir d'une lentille de Fresnel. Elle peut être convexe ou concave. [0030] De préférence l'élément optique de l'invention est optiquement transparent, c'est-à-dire qu'il présente une transmittance à la lumière d'au moins 88% selon la norme ASTM D1003. The optical element is advantageously a lens. It can be a Fresnel lens. It can be convex or concave. Preferably the optical element of the invention is optically transparent, that is to say it has a light transmittance of at least 88% according to ASTM D1003.
[0031] L'élément optique peut être préparé selon tout procédé connu de préparation d'élément optique, notamment de lentille. The optical element may be prepared according to any known method for preparing an optical element, in particular a lens.
[0032] On peut dans un premier temps préparer des granulés constitués du(des) composé(s) constitutif(s) de l'élément optique, par exemple par extrusion sous forme de joncs, du polymère ou d'une composition comprenant le polymère constitutif de l'élément optique ; joncs qui sont ensuite coupés pour former des granulés. Les additifs tels que plastifiants, stabilisants etc. peuvent être introduits à différents endroits du dispositif d'extrusion, par exemple à différents endroits d'une extrudeuse bi-vis. Les granulés peuvent ensuite être introduits dans un dispositif de transformation et mise en forme, tel qu'un dispositif de moulage, de moulage par injection, d'extrusion, de moulage par coulée etc. Ces procédés sont connus de l'homme du métier. Can firstly prepare granules consisting of (the) constituent compound (s) of the optical element, for example by extrusion in the form of rods, the polymer or a composition comprising the polymer constituent of the optical element; rushes which are then cut to form granules. Additives such as plasticizers, stabilizers etc. can be introduced at different locations of the extrusion device, for example at different locations of a twin-screw extruder. The granules can then be introduced into a processing and shaping device, such as a molding, injection molding, extrusion, casting molding, etc. These methods are known to those skilled in the art.
[0033] L'invention concerne également un module de source lumineuse à LED (diode électroluminescente) comprenant un système optique ayant au moins un élément optique tel que décrit ci-dessus. The invention also relates to an LED light source module (light emitting diode) comprising an optical system having at least one optical element as described above.
[0034] Ce module de source lumineuse à LED (diode électroluminescente) comprend : This LED light source module (light emitting diode) comprises:
au moins une puce à LED (diode électroluminescente) encapsulée dans un matériau encapsulant, tel qu'une résine epoxy  at least one LED chip encapsulated in an encapsulating material, such as an epoxy resin
- au moins système optique comprenant au moins un élément optique tel que décrit ci-i-dessus  at least one optical system comprising at least one optical element as described above
deux électrodes (anode et cathode) [0035] La structure des modules de source lumineuse à LED (diode électroluminescente) sont connus de l'homme du métier. two electrodes (anode and cathode) The structure of the LED light source modules (light emitting diode) are known to those skilled in the art.
[0036] La puce à LED (diode électroluminescente) du module de source lumineuse à LED de l'invention peut être toute puce qui émet dans le visible, l'ultraviolet ou l'infrarouge. The LED chip (light emitting diode) of the LED light source module of the invention may be any chip that emits in the visible, ultraviolet or infrared.
[0037] La structure de la puce à LED (diode électroluminescente) comprend une couche de matériau semi-conducteur. Par exemple, la puce à LED peut comprendre des couches de matériau semi-conducteur des colonnes III et IV du tableau périodique des éléments, tels que GaAs, GaAIAs, GaN, InGaN, GaP etc, ou des couches de matériau semi-conducteur des colonnes II à VI du tableau périodique des éléments, tels que ZnSe, ZnSSe, CdTe, etc., ou des couches de matériau semi-conducteur des colonnes IV et V du tableau périodique des éléments, tels que SiC. La puce à LED peut également comprendre d'autres couches. The structure of the LED chip (light emitting diode) comprises a layer of semiconductor material. For example, the LED chip may comprise layers of semiconductor material of columns III and IV of the periodic table of elements, such as GaAs, GaAlAs, GaN, InGaN, GaP, etc., or layers of semiconductor material of the columns. II to VI of the periodic table of elements, such as ZnSe, ZnSSe, CdTe, etc., or semiconductor material layers of columns IV and V of the periodic table of elements, such as SiC. The LED chip may also include other layers.
[0038] Le module de source lumineuse à LED (diode électroluminescente) de l'invention peut comprendre une pluralité de puces à LED. [0039] La structure des systèmes optiques des modules de source lumineuse à LED (diode électroluminescente) est connue de l'homme du métier. Elle peut être complexe et variée. The LED light source module (light emitting diode) of the invention may comprise a plurality of LED chips. The structure of optical systems LED light source modules (light emitting diode) is known to those skilled in the art. It can be complex and varied.
[0040] Le système optique permet notamment d'optimiser la transmission de la lumière générée par la(les) puce(s) à LED du module. The optical system allows in particular to optimize the transmission of light generated by the LED chip (s) of the module.
[0041] Le système optique comprend au moins un élément optique. Il peut comprendre une combinaison de plusieurs éléments optiques. [0042] Le système optique peut avoir différentes formes et différents agencements. Ces formes et ces agencements sont connus de l'homme du métier. The optical system comprises at least one optical element. It can include a combination of several optical elements. The optical system can have different shapes and different arrangements. These shapes and arrangements are known to those skilled in the art.
[0043] Selon un mode de réalisation particulier de l'invention, l'élément optique est une lentille qui recouvre la puce à LED. Elle peut par exemple être en forme de bille, de dôme etc. [0044] Selon un mode de réalisation particulier du module de l'invention, l'élément optique est un collimateur, un collecteur ou un divergeur. Un collimateur est un élément optique qui concentre le flux lumineux. [0045] L'invention concerne enfin une lampe à LED (diode électroluminescente) comprenant au moins le module de source lumineuse à LED de l'invention. According to a particular embodiment of the invention, the optical element is a lens that covers the LED chip. It can for example be in the form of ball, dome etc. According to a particular embodiment of the module of the invention, the optical element is a collimator, a collector or a divergent. A collimator is an optical element that concentrates the luminous flux. The invention finally relates to an LED lamp (light emitting diode) comprising at least the LED light source module of the invention.
[0046] Selon un autre mode de réalisation particulier de l'invention, la lampe comprend également une ampoule ou une vasque recouvrant le module de source lumineuse à LED. Cette ampoule ou cette vasque a généralement un rôle de protection du module de source lumineuse à LED. According to another particular embodiment of the invention, the lamp also comprises a bulb or a basin covering the LED light source module. This bulb or this basin usually has a protective role of the LED light source module.
[0047] L'ampoule peut être de différentes formes. Elle peut par exemple être ronde, courbe, cylindrique etc. The bulb can be of different shapes. It can for example be round, curved, cylindrical, etc.
[0048] Selon ce mode de réalisation particulier de l'invention, l'ampoule ou la vasque comprend de préférence au moins un polymère choisi parmi les polymères suivants : la cellulose et ses dérivés, l'amidon et ses dérivés, les alginates et leurs dérivés, les guars et leurs dérivés, la chitine et ses dérivés, la pectine et ses dérivés. Tout ce qui a été décrit ci-dessus sur le polymère de l'élément optique s'applique ici pour l'ampoule ou la vasque. According to this particular embodiment of the invention, the ampoule or vessel preferably comprises at least one polymer chosen from the following polymers: cellulose and its derivatives, starch and its derivatives, alginates and their derivatives, guars and their derivatives, chitin and its derivatives, pectin and its derivatives. All that has been described above on the polymer of the optical element applies here for the bulb or the basin.
[0049] L'élément optique de l'invention présente de très bonnes propriétés pour son application dans les modules de source lumineuse à LED. En effet, il est transparent (il présente une transmittance à la lumière élevée), plus léger que le verre, et il présente de bonnes propriétés mécaniques, en termes de module notamment. Il peut être obtenu à des tailles et des formes variées, et il est adapté pour une production de masse. Un autre avantage de l'élément optique de l'invention est qu'il est réalisé en un matériau biosourcé. The optical element of the invention has very good properties for its application in LED light source modules. Indeed, it is transparent (it has a transmittance to high light), lighter than glass, and it has good mechanical properties, in terms of particular module. It can be obtained in various sizes and shapes, and is suitable for mass production. Another advantage of the optical element of the invention is that it is made of a biobased material.
[0050] D'autres détails ou avantages de l'invention apparaîtront plus clairement à la vue des exemples donnés ci-dessous. Other details or advantages of the invention will appear more clearly in view of the examples given below.
EXEMPLES EXAMPLES
Exemple 1 : Des disques d'acétate de cellulose plastifié pour élément optique dans un module de source lumineuse à LED ont été préparés dans cet exemple. Example 1 Plasticized cellulose acetate discs for an optical element in an LED light source module were prepared in this example.
Un acétate de cellulose de degré de substitution 2,45 et de viscosité intrinsèque 0,342 d'après la norme ASTM D871-72 a été plastifié par 30% en poids de triacétine commercialisée par la société Eastman, en extrusion. A cellulose acetate of degree of substitution 2.45 and intrinsic viscosity 0.342 according to the ASTM D871-72 standard was plasticized by 30% by weight of triacetin marketed by Eastman, in extrusion.
Ce matériau a été préparé dans les conditions suivantes. Une extrudeuse bivis co- rotative Evolum 32® commercialisée par la société Clextral, de diamètre D = 32 mm et de rapport longueur sur diamètre L/D = 44 a été utilisée. La poudre d'acétate de cellulose a été introduite par la trémie d'alimentation et le plastifiant liquide (triacétine) a été introduit en début de vis par un canal d'alimentation spécifique. Les conditions de mise en œuvre appliquées sont les suivantes : This material was prepared under the following conditions. An Evolum 32® twin-screw extruder sold by the company Clextral, of diameter D = 32 mm and length to diameter ratio L / D = 44 was used. The cellulose acetate powder was introduced through the feed hopper and the liquid plasticizer (triacetin) was introduced at the beginning of the screw by a specific feed channel. The implementation conditions applied are the following:
- Vitesse de rotation des vis : 100 tr/min  - Speed of rotation of the screws: 100 rpm
- Débit : 10 kg/h  - Flow rate: 10 kg / h
- Profil de température depuis la trémie d'alimentation vers la filière : de 80 à 160°C  - Temperature profile from the feed hopper to the die: from 80 to 160 ° C
En sortie d'extrudeuse, le jonc d'acétate de cellulose plastifié a été granulé. Les granulés ainsi préparés ont ensuite été mis en forme par moulage par injection avec une presse Arburg 350-90® (force de fermeture du moule de 35 tonnes). Des disques d'acétate de cellulose plastifié de diamètre 85 mm et d'épaisseur 3 mm ont été obtenus dans les conditions suivantes : At the extruder outlet, the plasticized cellulose acetate rod was granulated. The granules thus prepared were then shaped by injection molding with an Arburg 350-90® press (35-tonne mold closing force). Disks of plasticized cellulose acetate 85 mm in diameter and 3 mm thick were obtained under the following conditions:
- Profil de température de l'extrudeuse monovis depuis la trémie d'alimentation :  - Temperature profile of the single-screw extruder from the feed hopper:
160 - 172 - 172 - 179°C  160 - 172 - 172 - 179 ° C
- Température du moule : 70°C  - Temperature of the mold: 70 ° C
- Longueur du cycle d'injection : 37,8 s  - Length of the injection cycle: 37.8 s
Un spectrophotomètre Konica Minolta CM-5® a ensuite été utilisé afin de mesurer la transmittance d'après la norme ASTM D1003. Une transmittance de 94,3% à 700 nm a été obtenue pour cet échantillon de 3 mm d'épaisseur. A Konica Minolta CM-5® spectrophotometer was then used to measure the transmittance according to ASTM D1003. A 94.3% transmittance at 700 nm was obtained for this 3 mm thick sample.
Exemple 2 : Dans cet exemple, un acétate butyrate de cellulose CAB 381-2® commercialisé par la société Eastman a été plastifié par 10% en poids de triacétine commercialisée par la société Aldrich. Les additifs suivants ont été ajoutés à la formulation : Example 2 In this example, a CAB 381-2® cellulose butyrate acetate marketed by Eastman was plasticized with 10% by weight of triacetin marketed by Aldrich. The following additives have been added to the formulation:
- Anti-oxydants : o 0,5% en poids d'Irganox 1010® (tetrakis-(methylene-(3,5-di-(tert)-butyl-4- hydrocinnamate)) méthane) (commercialisé par la société Ciba). o 0,5% en poids d'Irgafos 168® (tris-(2,4-di-tert-butylphényl) phosphite) (commercialisé par la société Ciba) - Antioxidants: o 0.5% by weight of Irganox ® 1010 (tetrakis (methylene (3,5-di- (tert) -butyl-4-hydrocinnamate)) methane) (marketed by the company Ciba) . o 0.5% by weight of Irgafos ® 168 (tris- (2,4-di-tert-butylphenyl) phosphite) (marketed by the company Ciba)
- Absorbeur UV o 0,3% en poids de Tinuvin 234® (2-(2H-benzzotriazol-2-yl)4,6-bis(1-ethyl-1- phenylethylphenol) (commercialisé par la société Ciba). - UV absorber o 0.3% by weight of Tinuvin ® 234 (2- (2H-benzzotriazol-2-yl) 4,6-bis (1-ethyl-1- phenylethylphenol) (marketed by the company Ciba).

Claims

REVENDICATIONS
1. Elément optique pour module de source lumineuse à LED (diode électroluminescente), caractérisé en ce qu'il comprend au moins un polymère choisi parmi les polymères suivants : la cellulose et ses dérivés, l'amidon et ses dérivés, les alginates et leurs dérivés, les guars et leurs dérivés, la chitine et ses dérivés, la pectine et ses dérivésAn optical element for an LED light source module (light-emitting diode), characterized in that it comprises at least one polymer chosen from the following polymers: cellulose and its derivatives, starch and its derivatives, alginates and their derivatives, guars and their derivatives, chitin and its derivatives, pectin and its derivatives
2. Elément optique pour module de source lumineuse à LED (diode électroluminescente) selon la revendication 1 , caractérisé en ce que le polymère est un ester Optical element for LED light source module (light-emitting diode) according to claim 1, characterized in that the polymer is an ester
3. Elément optique pour module de source lumineuse à LED (diode électroluminescente) selon la revendication 1 ou 2, caractérisé en ce que le polymère est un ester de cellulose. Optical element for LED light source module (light-emitting diode) according to claim 1 or 2, characterized in that the polymer is a cellulose ester.
4. Elément optique pour module de source lumineuse à LED (diode électroluminescente) selon l'une des revendications précédentes, caractérisé en ce que le polymère est l'acétate de cellulose. 4. Optical element for LED light source module (light emitting diode) according to one of the preceding claims, characterized in that the polymer is cellulose acetate.
5. Elément optique pour module de source lumineuse à LED (diode électroluminescente) selon l'une des revendications précédentes, caractérisé en ce qu'il comprend au moins 50% de polymère 5. Optical element for LED light source module (light-emitting diode) according to one of the preceding claims, characterized in that it comprises at least 50% of polymer
6. Elément optique pour module de source lumineuse à LED (diode électroluminescente) selon l'une des revendications précédentes, caractérisé en ce qu'il comprend un plastifiant6. Optical element for LED light source module (light-emitting diode) according to one of the preceding claims, characterized in that it comprises a plasticizer
7. Elément optique pour module de source lumineuse à LED (diode électroluminescente) selon l'une des revendications précédentes, caractérisé en ce qu'il comprend un stabilisant thermique 7. Optical element for LED light source module (light-emitting diode) according to one of the preceding claims, characterized in that it comprises a thermal stabilizer
8. Elément optique pour module de source lumineuse à LED (diode électroluminescente) selon l'une des revendications précédentes, caractérisé en ce qu'il comprend un stabilisant à la lumièreOptical element for LED light source module (light-emitting diode) according to one of the preceding claims, characterized in that it comprises a light stabilizer.
9. Elément optique pour module de source lumineuse à LED (diode électroluminescente) selon l'une des revendications précédentes, caractérisé en ce qu'il s'agit d'une lentille 9. Optical element for LED light source module (light-emitting diode) according to one of the preceding claims, characterized in that it is a lens
10. Module de source lumineuse à LED (diode électroluminescente) comprenant : An LED light source module (light emitting diode) comprising:
- au moins une puce à LED (diode électroluminescente), encapsulée dans un matériau encapsulant tel qu'un résine epoxy at least one LED chip (light-emitting diode), encapsulated in an encapsulating material such as an epoxy resin
- un système optique comprenant au moins un élément optique selon l'une des revendications 1 à 9 an optical system comprising at least one optical element according to one of claims 1 to 9
- deux électrodes (anode et cathode)  - two electrodes (anode and cathode)
1 1 . Module de source lumineuse à LED (diode électroluminescente) selon la revendication 10, caractérisé en ce que l'élément optique est une lentille recouvrant la puce à LED 1 1. LED light source module (light-emitting diode) according to claim 10, characterized in that the optical element is a lens covering the LED chip
12. Module de source lumineuse à LED (diode électroluminescente) selon la revendication 10 ou 1 1 , caractérisé en ce que l'élément optique est un collimateur, un collecteur, un divergeur12. LED light source module (light-emitting diode) according to claim 10 or 1 1, characterized in that the optical element is a collimator, a collector, a divergent
13. Module de source lumineuse à LED (diode électroluminescente) selon l'une des revendications 10 à 12, caractérisé en ce qu'il comprend plusieurs puces à LED 13. LED light source module (light-emitting diode) according to one of claims 10 to 12, characterized in that it comprises several LED chips
14. Lampe à LED (diode électroluminescente), caractérisée en ce qu'elle comprend au moins le module de source lumineuse à LED selon l'une des revendications 10 à 13. 14. LED lamp (light-emitting diode), characterized in that it comprises at least the LED light source module according to one of claims 10 to 13.
15. Lampe à LED (diode électroluminescente) selon la revendication 14, caractérisée en ce qu'elle comprend également une vasque ou une ampoule recouvrant le module de source lumineuse à LED 16. Lampe à LED (diode électroluminescente) selon la revendication 15, caractérisée en ce que l'ampoule ou la vasque comprend au moins un polymère choisi parmi les polymères suivants : la cellulose et ses dérivés, l'amidon et ses dérivés, les alginates et leurs dérivés, les guars et leurs dérivés, la chitine et ses dérivés, la pectine et ses dérivés. 15. LED lamp (light-emitting diode) according to claim 14, characterized in that it also comprises a vessel or a bulb covering the LED light source module 16. LED lamp (light-emitting diode) according to claim 15, characterized in that the ampoule or basin comprises at least one polymer chosen from the following polymers: cellulose and its derivatives, starch and its derivatives, alginates and their derivatives, guars and their derivatives, chitin and its derivatives , pectin and its derivatives.
EP11802711.9A 2010-12-20 2011-12-20 Led (light emitting diode) luminous source module Withdrawn EP2656117A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1060823A FR2969311B1 (en) 2010-12-20 2010-12-20 LED LIGHT SOURCE MODULE (LIGHT EMITTING DIODE)
PCT/EP2011/073339 WO2012084899A1 (en) 2010-12-20 2011-12-20 Led (light‑emitting diode) luminous source module

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EP2656117A1 true EP2656117A1 (en) 2013-10-30

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EP11802711.9A Withdrawn EP2656117A1 (en) 2010-12-20 2011-12-20 Led (light emitting diode) luminous source module

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US (1) US20130341665A1 (en)
EP (1) EP2656117A1 (en)
JP (1) JP2014501444A (en)
KR (1) KR20140048078A (en)
CN (1) CN103492911A (en)
FR (1) FR2969311B1 (en)
WO (1) WO2012084899A1 (en)

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CN103492911A (en) 2014-01-01
KR20140048078A (en) 2014-04-23
FR2969311B1 (en) 2013-01-18
WO2012084899A1 (en) 2012-06-28
US20130341665A1 (en) 2013-12-26
FR2969311A1 (en) 2012-06-22
JP2014501444A (en) 2014-01-20

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