JP5373244B2 - Light-emitting diode lens component and light-emitting diode light source device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a lens for LED in which UV-rays not converted by an LED light source is prevented from leaking to the outside of the LED light source, and impact of UV-rays on the peripheral members, e. g. deterioration of acryl resin, ABS resin, and the like, used in car components due to leaked UV-rays, can be prevented effectively, and to provide an LED light source excellent in heat resistance, weatherability such as UV-resistance, and stability with time and capable of emitting light with stabilized color tone. <P>SOLUTION: A lens 1 for light emitting diode being used as the lens of a light emitting diode light source 2 with lens comprises a lens body 11 formed of a material having heat resistance and UV-resistance, and a UV-ray absorption layer 12 employing a material having heat resistance and UV-resistance as a substrate and containing a UV-ray absorbing material wherein the UV-ray absorption layer 12 is the lens 1 for light emitting diode provided on the light emitting diode light source side of the lens body 11. The light emitting diode light source 2 employing the lens 1 for light emitting diode is also provided. <P>COPYRIGHT: (C)2006,JPO&amp;NCIPI

Description

The present invention relates to a light emitting diode for lens components及 beauty LED apparatus, and more particularly, a light emitting diode lens component which is used as a lens of the lens-equipped light-emitting diode light source device, comprising a UV absorber the present invention relates to a light emitting diode light source device using a light emitting diode for lens components及 Bikore having an ultraviolet absorbing layer.

  A light-emitting diode (hereinafter abbreviated as LED) is a product in which an LED die itself emits light when an electric current is passed through the LED die (light-emitting element). Traffic lights, stop lamps, displays, general lighting, automotive parts ( Recently, so-called high-power LEDs have been developed, and for example, a high-power LED light source device as shown in FIG. 2 has been developed.

  The high-power LED light source device shown in FIG. 2 is a so-called resin-sealed LED light source device with a lens. In the figure, 1 'is an LED lens, and 2' is an LED light source device. The LED lens 1 ′ is formed of a transparent material into a substantially dome shape having a flange portion 11 a on the bottom surface. The LED light source device 2 ′ includes a housing 21 made of a light-shielding material, having an upper surface opened, and a stepped portion 21b provided on the lower side wall of the opening 21a. The bottom surface of the housing 21 has a recess 22a. A heat sink 22 is incorporated. The LED die 24 is bonded to the upper surface of the recess 22 a of the heat sink 22 with silver paste or the like, and the surface electrode of the LED die 24 is connected to the electrode 23 inserted from the side wall of the housing 21 by the conductive wire 25. The LED die 24 is covered with the coating part 4. The housing 21 is filled with the resin mold 26 so as not to form a gap between the lower surface of the LED lens 1 ′ and the upper surface of the step portion 21b of the housing 21 is filled with the LED lens 1 ′. The bottom surface of is attached.

  The coating portion 4 is obtained by dispersing a phosphor in a translucent resin such as an epoxy resin. This phosphor converts the wavelength of the light generated by the LED die and emits light having a wavelength different from that of the LED die. For example, a white LED light source device used for general illumination includes: YAG phosphors are used for blue LED dies, and R, G, B (red, green, blue) phosphors are used for ultraviolet LED dies.

  Conventionally, polymethyl methacrylate (PMMA), polycarbonate, optical nylon, epoxy resin, cyclic olefin copolymer, and the like have been used as a sealing material and a lens material for such an LED light source device. However, there is a problem that light transmission characteristics are likely to deteriorate with time. For example, epoxy resins that are widely used among these are severely deteriorated by heat and ultraviolet rays, and brown or yellow is obtained by a heating test at 150 ° C. for 700 hours. Discolored. When such discoloration occurs, light with a stable color tone cannot be obtained. Therefore, a translucent material that has excellent heat resistance and UV resistance in place of epoxy resin, etc., and excellent light transmission over time is desired. It was rare. The LED die increases proportionally as the current is supplied, but the amount of heat generated increases proportionally. On the other hand, the amount of heat generation increases significantly. In order to obtain it, it was important that the materials used for the sealing material and the lens material were excellent in heat resistance and ultraviolet resistance.

Accordingly, various techniques have been proposed in response to such demands. For example, Patent Document 1 proposes forming an ultraviolet absorbing layer along the outer peripheral surface of a cap member covering a blue LED chip. Yes.
Japanese Patent Laid-Open No. 9-27642

  However, in the case of the LED light source device, if the ultraviolet light emitted from the device leaks to the outside, there is a possibility that peripheral members when the LED light source device is attached may deteriorate, or the ultraviolet light emitted from the device may cause the ultraviolet light on the lens. Although there is a problem that the influence of heat is likely to occur, in the conventional technology, there was a technique that considered reducing the influence of heat and ultraviolet rays on the lens due to external ultraviolet rays, but such problems are considered Was not. Particularly in the case of an ultraviolet LED light source device, the amount of ultraviolet light emitted from the device increases.

The present invention has been made in view of the above circumstances, and comes out of an LED light source device, particularly an ultraviolet LED light source device, including a housing having an opening serving as a light emitting surface and a light emitting diode element housed in the housing. It is possible to prevent the coming ultraviolet rays from leaking to the outside of the device, to prevent deterioration of peripheral members, and to reduce the influence of heat and ultraviolet rays on the lens due to the ultraviolet rays coming out of the LED light source device, particularly the ultraviolet LED light source device. LED to LED for lens components can be, and by using this LED for lens components, excellent heat resistance and ultraviolet resistance, it is possible to emit light at a stable color tone, it is possible to reduce the influence on the peripheral member An object is to provide a light source device.

The present inventor has conducted extensive investigations to achieve the above objects, as the lens body of the material used as a sealing material and lens of the lens with the resin-sealed LED light source device, excellent heat resistance, ultraviolet resistance A transparent resin that is a silicone resin or silicone rubber, and a UV-absorbing layer containing a UV-absorbing material on the bottom surface of the lens body. by providing the side (LED light source device side), L ED light source instrumentation Okimoto body or al come out ultraviolet apparatus and a light emitting diode element housed in the housing and該筐body having an opening serving as a light emitting surface Leakage to the outside can be prevented, the influence of ultraviolet rays on the peripheral members can be prevented, and the influence of heat and ultraviolet rays on the lens caused by the ultraviolet rays emitted from the LED light source device can be reduced. The present invention has found that an LED lens having excellent heat resistance and ultraviolet resistance can be obtained, and that light emitted from the LED die can be emitted to the outside in a stable color tone. It came to make.

That is, according to the present invention, (1) a light emitting diode light source device body including a housing having an opening serving as a light emitting surface and a light emitting diode element housed in the housing is attached so as to cover the opening. A lens component for a light emitting diode used as a lens component for manufacturing a light emitting diode light source device with a lens, which is formed of a silicone resin or silicone rubber having a transmittance of 80% or more in a region of 350 nm to 800 nm. 1 to 200 parts by mass of an ultraviolet absorber selected from a lens body and a silicone resin, silicone rubber and / or a fluororesin as a base material and selected from ultrafine zinc oxide, titanium oxide and inorganic pigment contained so that, a UV-absorbing layer is a thickness of 1 to 1000 m, the ultraviolet absorbing layer, the upper Symbol Len Is laminated on the surface on the side attached to the LED apparatus main body of the body, the ultraviolet rays emitted from the LED apparatus body and this is a layer which prevents leaks in or external influences on the lens body Provided is a light-emitting diode lens component, and (2) an LED light source device using the LED lens component described in (1) above.

  Here, it is more preferable that the surface of the lens body is a grained surface or a pear ground, or the lens body contains a diffusing material.

Ultraviolet absorbing layer of the lens component the LED are those may be one which is integrally molded with the lens body, but that for example the ultraviolet absorbing layer molded separately from the above lens body integral to the lens body It is more preferable that the lens body and the ultraviolet absorbing layer, which are separately molded, are integrated as described above. In this case, if the material of the lens body and the base material of the ultraviolet absorbing layer are made of a combination of a silicone resin or silicone rubber and a fluororesin, a silicone resin or silicone rubber is crosslinked and bonded to the fluororesin It is more preferable that

Furthermore, the ultraviolet absorbing layer provided on the LED lens component of the present invention may be a single layer but, for example, be one which contains a concentration of the ultraviolet absorber is laminated different layers of two or more layers Or the ultraviolet absorbing material contained in the first ultraviolet absorbing layer and the ultraviolet absorbing material contained in the second layer have two or more ultraviolet absorbing layers so that the types and combinations thereof are different. You can also.

Furthermore, in the lens component above LED, as long as the main peak of the emission spectrum of the LED (die) is used in the light emitting diode light source instrumentation Okimoto body that is set in the range of 350Nm～570nm, more Is preferred.

Incidentally, LED for lens components of the present invention, or a phosphor is not dispersed in the lens body, even if the phosphor layer is laminated on the surface (lens surface) of the lens body, LED light source instrumentation Okimoto body it is possible to reduce the influence of heat and ultraviolet respect phosphor by pressurizing et come out ultraviolet light.

ADVANTAGE OF THE INVENTION According to this invention, it can prevent that the ultraviolet-ray which was not converted with the LED light source device leaks outside the LED light source device, for example, the acrylic resin and ABS resin which are used for the components of a car by the leaked ultraviolet-ray It is possible to effectively prevent the influence of ultraviolet rays on peripheral members such as deterioration of the lens, etc., so that it is particularly useful as an LED lens to be attached to an LED light source device used as an indicator for a car or an interior light, for example. together, it is possible to reduce the influence of heat and ultraviolet to the lens by ultraviolet light coming from the LED light source device, heat resistance, LED for lens components excellent ultraviolet resistance is obtained, further, heat resistance, ultraviolet LED light source device that is excellent in weather resistance such as property and stability over time and can emit light with a stable color tone can be obtained.

Hereinafter, the present invention will be described in more detail with reference to the drawings. 1, in order to explain the LED for lens components及 beauty LED light source device of the present invention, is a schematic longitudinal sectional view illustrating one configuration example of the LED light source device, and the LED lens component of the present invention, The high output LED light source device before attaching this is shown. In Figure 1, 1 lens component LED, 2 is an LED light source device. LED for lens component 1 also has a function as a function of the lens as a sealing material of a lens with a resin sealing type LED light source device 2. LED for lens component 1 includes a lens body 11, and an ultraviolet absorbing layer 12 provided on the lower surface side of the lens body 11. The lens body 11 is formed of a translucent resin material having heat resistance and ultraviolet resistance so as to have a substantially dome shape having a flat surface portion 11b that forms a flange portion 11a on the bottom surface (LED light source device 2 side). ing. The ultraviolet absorbing layer 12 is made of a translucent resin material having heat resistance and ultraviolet resistance as a base material, and the ultraviolet absorbing material is dispersed in the base material.

LED light source device 2 is composed of a light-shielding material, comprising a housing 21 whose upper surface is open, the lower side wall of the opening 21a of the housing 21, a lower surface peripheral portion of the phosphor layer 12 of the LED lens component 1 A step portion 21b with which 12a abuts is provided. The bottom surface of the housing 21 is formed by a heat sink 22 having a recess 22a. The tip end side 23 a of the electrode 23 is inserted into the side wall of the housing 21, and the LED die (light emitting element) 24 is placed on the upper surface of the recess 22 a of the heat sink 22. The LED die 24 is bonded to a silicon substrate installed on the upper surface of the recess 22a of the heat sink 22 with silver paste or the like. The surface electrode is electrically connected to the electrode 23 by the conductive wire 25 and allows a current to flow through the LED die. The heat sink 22 is made of copper or the like having high electrical conductivity, and absorbs and dissipates excess heat generated by light emission.

Then, in the housing 21, silicone gel, so that the gap does not occur between the lower surface of the resin mold 26 for LED lens component 1 made of a transparent elastic material such as silicone rubber (the lower surface of the ultraviolet absorbing layer 12) Is filled. LED light source device 2, the upper surface of the stepped portion 21b of the casing 21, a lower surface peripheral edge portion 12a of the ultraviolet absorbing layer 12 of the LED lens component 1 is brought into contact, by gluing in a conventional manner, for LED lens The component 1 is attached. The structure of the LED lens components, LED light source device of the present invention is not limited to the configuration of FIG. 1, for example, LED for lens components of the lens of FIG. 1, a configuration having a collar portion However, the lens body of the present invention may have a dome shape having no collar. Further, for example, ultraviolet absorbing layer of the LED lens component shown in Fig. 1, the lower surface portion of the lens body (flat part) is a large diameter, to fit the stepped portion of the housing of the LED light source device, stage Although the size is the same as the diameter of the portion, the ultraviolet absorbing layer of the present invention can cover the opening of the housing and can be appropriately sized so long as it does not have a smaller diameter than the bottom surface of the lens body.

The LED for lens components, by providing the ultraviolet absorbing layer on the lower surface side of the lens body (LED light source device side), or apply ultraviolet rays affect the lens body from the LED light source device, to leak to the outside of the apparatus It becomes possible to prevent.

Here, Oite the lens component above LED, lens body of material, since it is desirable that a transparent resin that is excellent in optical transparency, more than 80% at a wavelength of 350nm~800nm area, preferably 85 % or more, more preferably silicone Resins / or sheet Rikongo beam having a transmittance of 90% or more. More specifically, as silicone resins and silicone rubbers, for example, curing of addition reaction curable silicone resin compositions, condensation reaction curable silicone resin compositions, peroxide curable silicone resin compositions, and the like that are cured by heating or the like. More specifically, one or more selected from a methyl group, a phenyl group and a 1,1,1-trifluoropropyl group as an organic group, particularly a methyl group, a phenyl group or both Cured products such as an addition reaction curable silicone resin composition, a condensation reaction curable silicone resin composition, and a peroxide curable silicone resin composition containing an organopolysiloxane having the above are more preferable.

  As such a silicone resin composition, a commercially available product can be used. For example, as an addition reaction curable type, KJR9022, 9050, 9031,632 manufactured by Shin-Etsu Chemical Co., Ltd., XE14-907 manufactured by GE Toshiba Silicone Co., Ltd. SR7010 manufactured by Toray Dow Corning Silicone Co., Ltd. can be used. Moreover, SR-2410, SE-9140 (made by Toray Dow Corning Silicone Co., Ltd.) etc. can be used as a condensation reaction hardening type silicone resin composition.

  In the present invention, as will be described later, when cross-linking adhesion to a fluororesin, if an addition reaction curable silicone resin composition or a condensation reaction curable silicone resin composition is used as the silicone resin composition, It is preferable that the silicone resin composition contains a small amount of peroxide. The type of the peroxide is not particularly limited, and any of inorganic peroxides and organic peroxides can be used. For example, lauroyl peroxide, dibenzoyl peroxide, bis- Diacyl peroxides represented by 3,5,5-trimethylhexanoyl peroxide, dicumyl peroxide, 2,5-dimethyl-2,5-ditertiary butyl peroxyhexane, ditertiary butyl peroxide, Dialkyl peroxides typified by dibutyl cumyl peroxide, alkyl peresters typified by t-butyl peroxybenzoate, t-butyl peroxyisobutyrate, and other peroxyketals, percarbonates, etc. The organic peroxide is more preferable. These can be added singly or in combination of two or more.

  The addition reaction curable silicone resin composition or the condensation reaction curable silicone resin composition containing such a peroxide is a silicone resin composition not containing a peroxide, for example, the above-described commercially available addition reaction curing. It can be prepared by adding a peroxide to a silicone resin composition of a mold type or a silicone resin composition of a condensation reaction curing type and mixing them. In addition, the addition amount of the peroxide is preferably 0.01 to 20% by mass, more preferably 0.05 to 10% by mass, and particularly preferably 0.1 to 5% by mass with respect to the total amount of the silicone resin composition. It is preferable to add such that If the amount of peroxide added is too small, it may be difficult to obtain the desired improvement in adhesive strength. If it is too large, the silicone resin and silicone rubber portions may become brittle.

  In addition, in the present invention, as described later, in the case of cross-linking adhesion to a fluororesin, when an addition reaction curable silicone resin composition or a condensation reaction curable silicone resin composition is used as the silicone resin composition, a reactive radical is used. Those containing a compound capable of generating. The type of such a compound is not particularly limited, and examples thereof include azo compounds such as azobisisobutyronitrile, persulfates such as ammonium persulfate, and persulfides. It can be added singly or in combination of two or more.

  An addition reaction curable silicone resin composition or a condensation reaction curable silicone resin composition containing such a compound is a silicone resin composition that does not contain a compound that generates a reactive radical, such as the above-mentioned commercially available products. It can be prepared by adding and mixing a compound that generates a reactive radical to the addition reaction curable silicone resin composition or condensation reaction curable silicone resin composition. In addition, the addition amount of the compound which generates a reactive radical is preferably 0.01 to 20% by mass, more preferably 0.05 to 10% by mass, and particularly preferably 0.1% with respect to the total amount of the silicone resin composition. It is preferable to add so as to be ˜5% by mass. If the amount added is too small, it may be difficult to obtain the desired improvement in adhesive strength, and if it is too large, the strength of the lens may be affected.

  Examples of the fluororesin include polytetrafluoroethylene (PTFE), polychlorotrifluoroethylene (PCTFE), ethylene-tetrafluoroethylene copolymer (ETFE), ethylene-chlorotrifluoroethylene copolymer (ECTFE), tetra Fluoroethylene-hexafluoropropylene copolymer (FEP), tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer (PFA, Mexfuron), polyvinylidene fluoride (PVDF), chlorotrifluoroethylene-alkyl vinyl ether copolymer, A top, Teflon AF, etc. are mentioned, These can be used individually by 1 type or in combination of multiple.

  The manufacturing method of the lens body of the present invention is not particularly limited. For example, when molding separately from the ultraviolet absorbing layer, the material before curing is poured into a molding die or the like according to a conventional method and cured. It is manufactured by molding. Here, the lens body of the present invention may have a flat surface, but if the surface of the pear is a fine wrinkle, a wrinkled wrinkle surface, or a pear surface without any real skin, the light is It is more preferable because it can diffuse and make it difficult to see from the outside the colored portion that may occur depending on the concentration and type of the ultraviolet absorber. Here, examples of the method for processing the surface of the lens body on the surface of the lens body or processing the pear surface include sand blasting, bead blasting, and chemical etching.

  Further, even if the lens body contains a diffusing material, it is more preferable because it can diffuse light in the same manner and make it difficult to see even if a colored portion occurs. Examples of the diffusing material include titanium oxide, zinc oxide, silica, calcium carbonate, magnesium carbonate, aluminum oxide, and barium sulfate. These can be used alone or in combination of two or more. In addition, when a diffusing material is contained in the lens body, the content is not particularly limited, but usually, it is preferably 0.1 to 10% by mass, more preferably 0.8% with respect to the total amount of the lens body. 5 to 5% by mass, more preferably 1 to 3% by mass is preferable. If the content of the diffusing material is too large, the brightness may become dark, and if it is too small, the desired effect may not be obtained.

Furthermore, as described above, the phosphor may be dispersed in the lens body, or a phosphor layer in which the phosphor is dispersed in a base material made of a translucent resin material may be laminated on the lens body. The type of the phosphor is not particularly limited as long as it can convert the wavelength of the light generated by the LED die, and the type of LED die of the LED device to be used and the target color tone are not limited. The YAG phosphor, RGB phosphor (red Y ₂ O ₂ S: Eu, green ZnS: Cu, Al, blue (Ba, Mg, blue Al ₁₀ O ₁₇ : Eu), for example, can be selected as appropriate. , CaS: Eu, SrS: Eu, etc., and these can be used alone or in appropriate combination of two or more thereof. For example, YAG (yttrium, aluminum, garnet) phosphors for blue LED die (INGaN) and R, G, B (red, green, blue) for ultraviolet LED die (INGaN) ) The combination of the phosphor also, if white color tone of interest, it is preferable combination of a YAG phosphor.

  When the lens body of the present invention contains a phosphor, the content of the phosphor is not particularly limited. For example, when the phosphor layer is molded separately from the lens body, the total amount of the phosphor layer The phosphor is preferably dispersed in the base material so that the phosphor is preferably 5 to 80% by mass, more preferably 10 to 60% by mass, and still more preferably 20 to 50% by mass. If the phosphor content is too large, it may be fragile, and if it is too small, it may be difficult to obtain a desired color tone.

  As described above, the ultraviolet absorbing layer of the present invention is obtained by dispersing an ultraviolet absorbing material in a base material made of a translucent resin material, and the base material is the same as the material of the lens body. Silicone resin, silicone rubber and / or fluororesin which may be different and have a transmittance of 80% or more, preferably 85% or more, more preferably 90% or more in the wavelength region of 350 nm to 800 nm which is a material of the lens body Besides, for example, a translucent silicone resin such as KE951 manufactured by Shin-Etsu Chemical Co., Ltd., a silicone rubber and / or a fluororesin can be suitably used. The ultraviolet absorbing layer may be formed by dispersing an ultraviolet absorbing material in a portion which becomes the bottom surface side (LED device side) of the lens body when the lens body is molded, and the lens body is molded. At the same time, apart from the lens body, the ultraviolet absorber is dispersed in the base material made of the above-described translucent resin before curing, molded into a sheet shape or a film shape, and cut into a circular shape of a desired size, It may be laminated on the lower surface of the lens body by appropriate means. Furthermore, a dispersion liquid in which an ultraviolet absorbing material is dispersed in a base material made of the above-mentioned translucent resin before curing is applied to the bottom surface (surface on the LED device side) of the molded lens body and cured to cure the ultraviolet absorbing layer. It may be what. In these cases, as described above, the translucent material as the base material may be the same as or different from the material of the lens body, but a combination of silicone resin or silicone rubber and fluororesin. In this case, it is more preferable that the material of the lens body is silicone resin or silicone rubber, and the base material of the ultraviolet absorbing layer is a fluororesin.

  As the ultraviolet absorbing material contained in the ultraviolet absorbing layer of the present invention, ultrafine zinc oxide and titanium oxide can be used singly or in appropriate combination of two or more. Moreover, the near-ultraviolet absorber made of an inorganic pigment described later can also be used as the ultraviolet absorber of the present invention. In addition, when a fine particle is used as the ultraviolet absorbing material, a transparent ultraviolet absorbing layer can be obtained. The content of the ultraviolet absorbing material in the ultraviolet absorbing layer of the present invention is such that the ultraviolet absorbing material is 1 to 200 parts by mass, more preferably 1 to 100 parts per 100 parts by mass of the base material of the ultraviolet absorbing layer to be molded separately from the lens body. It is dispersed in the upper substrate so as to be 1 part by mass, more preferably 1 to 50 parts by mass. If the content of the ultraviolet absorbing material is too large, it may be easily brittle, and if it is too small, it may be difficult to obtain a desired ultraviolet absorbing effect.

  As long as the ultraviolet absorbing layer is formed on the LED light source device side of the lens body, the containing form, containing position, and containing method of the ultraviolet absorbing material are not particularly limited. For example, as described above, the lens It may be dispersed so as to be unevenly distributed on the LED light source device side in the body, or an ultraviolet absorber is dispersed in the translucent resin before curing and cured to form an ultraviolet absorbing sheet or film, which is used as a lens body. It may be laminated on the lower surface (LED light source device side) as an ultraviolet absorbing layer, and the bottom surface (LED light source device side) of the lens body may be coated with the ultraviolet absorbing material.

The thickness of the UV absorbing layer may be uniform or non-uniform, but when the UV absorbing layer is molded separately from the lens body, the uniform UV absorbing layer thickness is more productive. On the other hand, when an ultraviolet absorber is unevenly distributed in the lens body, an ultraviolet absorbing layer having a non-uniform thickness is more easily obtained. The layer thickness of the ultraviolet absorbing layer of the present invention is such that the thickness (average thickness) of the ultraviolet absorbing layer molded separately from the lens body is 1-1000 μm, more preferably 10-500 μm, still more preferably 10-400 μm. is there. If the ultraviolet absorbing layer is too thick, the dimension may be too large, and if it is too thin, it may be liable to break during molding or the dimensional accuracy may be deteriorated.

Ultraviolet absorbing layer of the lens component the LED, as described above, or may be formed integrally with the lens body and, for example pre-sheet to ultraviolet absorber with the above light-transmitting resin material Alternatively, a UV-absorbing layer that is molded into a film and cut into a circular shape of the desired size from this molded body is bonded to a separately molded lens body and laminated, or the lens body material is cured in a pre-molded UV-absorbing layer In this state, the UV light-absorbing layer before curing was applied to the lower surface of the lens body that was molded in advance, or was poured into the lens body, and the UV-absorbing layer was cured and adhered to the lens body in this state. If the lens body and the UV absorbing layer, which are separately molded, are integrated as in the case of an object, it is easy to adjust the concentration of the UV absorbing material in the UV absorbing layer and the thickness of the UV absorbing layer. In Runode, it is more preferable.

  In this case, if the material of the lens body and the base material of the ultraviolet absorbing layer are made of a combination of the silicone resin, silicone rubber and the fluororesin, in particular, since heat resistance and ultraviolet resistance are excellent, Although more effective, in this case, for example, if an attempt is made to integrate with an adhesive, an adhesive that does not impair the object of the present invention must be selected, and the selection may be difficult. In addition, sufficient adhesion strength may not be obtained by heat bonding. In contrast, if the fluororesin is made by cross-linking silicone resin and silicone rubber, the lens body and the ultraviolet absorbing layer can be integrated with sufficient adhesive force without using an adhesive. Therefore, it is more preferable.

  More specifically, for example, when the base material of the ultraviolet absorbing layer is a fluororesin and the material of the lens body is a silicone resin, the ultraviolet absorbing layer (fluororesin) previously formed into a circular sheet (film) Surface treatment is applied to the adhesive surface. On the other hand, an uncured silicone resin composition molded as a lens body is poured into a predetermined molding die or the like, and laminated so that the surface treatment surface of the UV absorbing layer becomes an adhesive surface on the upper surface (lower surface as a lens body) Then, the silicone resin composition is cross-linked and bonded, and the cured and molded lens body is bonded to the ultraviolet absorbing layer based on the fluororesin. On the other hand, for example, when the base material of the ultraviolet absorbing layer is made of silicone resin or silicone rubber, and the lens body is made of fluororesin, the lower surface of the lens body previously molded with fluororesin is surface-treated. Then, an ultraviolet absorbing layer before curing is laminated on this surface, the silicone resin composition is crosslinked and bonded, and the ultraviolet absorbing layer as a cured and molded product is bonded to a lens body made of a fluororesin. Hereinafter, a method for crosslinking and adhering a silicone resin and silicone rubber to the fluororesin will be described in more detail.

  The surface treatment is not particularly limited as long as it is a treatment method that enables the above-mentioned cross-linking adhesion. For example, discharge treatment such as UV treatment, plasma discharge treatment or corona discharge treatment, wet-type sodium metal, etc. / Naphthalene liquid treatment. These treatments can be performed by known methods. For example, by using Tetra H (trade name, manufactured by Junko Co., Ltd.) as the metal sodium / naphthalene solution, the adhesive surface can be treated according to the usual method, whereby the metal sodium / naphthalene solution treatment can be performed on the adhesive surface. .

A primer treatment is also suitable as the surface treatment. Primer treatment can be performed according to a conventional method. When the primer treatment is performed, the surface of the fluororesin that has not been surface-treated can be treated, but the surface of the fluororesin that has been previously subjected to plasma discharge treatment, corona discharge treatment, metal sodium / naphthalene liquid treatment, etc. is further primed Processing is more effective. More specifically, for example, a silicone primer (FES-1 manufactured by Shin-Etsu Chemical Co., Ltd.) is applied to the surface of a fluororesin such as ETFE that has been subjected to corona discharge treatment, metal sodium / naphthalene liquid treatment, etc. as described above. It is more effective to apply a thin film with a brush or the like, then dry in a thermostatic bath at room temperature or about 50 ° C., and then cross-link and bond with the silicone resin composition.

A silicone resin composition is laminated on a fluororesin whose surface has been subjected to surface treatment as described above, and is crosslinked and bonded. For example, an uncured silicone resin composition is applied to a surface-treated fluororesin. by heat curing in close contact, the silicone resin is a cured product was adhered to the fluororesin in the curing process, fluororesin and silicone resin, lens parts for an LED integrated and the silicone rubber is manufactured .

  As a method of cross-linking and adhering the silicone resin composition to the fluororesin, for example, if the material of the lens body is a silicone resin or silicone rubber and the base material of the ultraviolet absorbing layer is a fluororesin, the following method can be used. . That is, a silicone resin composition to which a compound generating a peroxide or a reactive radical, a diffusing material, a phosphor or the like is added as needed is poured into a lens body mold heated to a predetermined temperature. A UV-absorbing layer having a resin as a base material and surface-treated is placed. Cross-linking adhesion is possible even if the inside of the mold is not in a reduced pressure state, but the inside of the mold is preferably 10 kPa or less, more preferably 100 Pa to 10 kPa, with a decompression pump. If the degree of vacuum is insufficient, the air present between the fluororesin and the silicone resin composition cannot be completely removed, resulting in poor adhesion. The molding pressure is preferably 3 to 50 MPa, more preferably 5 to 30 MPa. If the molding pressure is too small, the material flow may be insufficient and the surface smoothness may deteriorate.

  The temperature and time for cross-linking adhesion are arbitrarily selected depending on the type of silicone resin composition, the type of peroxide or a compound generating a reactive radical, and the cross-linking temperature is preferably 80 to 250 ° C., 100 to 200 ° C is more preferred. If the crosslinking temperature is too low, crosslinking may be insufficient and the adhesive strength may be reduced. If it is too high, scorching of silicone resin or silicone rubber may occur. The molding time (crosslinking time) is preferably 2 to 60 minutes, more preferably 5 to 60 minutes. If the molding time is too short, insufficient crosslinking and insufficient adhesion may occur. It is also preferable that the molded product is subjected to secondary crosslinking (after-curing) using a thermal oven or the like after the cross-linking adhesive molding. When a silicone resin composition containing a peroxide is used, there is no special change due to secondary crosslinking as long as 90% or more of the peroxide can be crosslinked and decomposed in the mold.

As described above, the ultraviolet absorbing layer having the LED for lens components of the present invention may be a single layer, but as long as it has two or more layers of the ultraviolet absorbing layer, more one layer Absorbs short-wavelength ultraviolet light, the second layer may absorb near ultraviolet light close to the visible region, and the second layer may be inorganic pigments, phthalocyanine-based, azo-based, and quinacridone, which are organic pigments with excellent heat resistance and ultraviolet resistance. , Isoindolinone, perylene, and anthraquinone pigments can also be used as the near-ultraviolet absorbing layer.

Furthermore, in the lens component above LED, light emitting diode light sources main peak of the emission spectrum of the LED die 350Nm～570nm, more preferably 360～500Nm, more preferably set in the range of 380~480nm What is used for an apparatus is more suitable. More specifically, for example INGaN system, ZnCdSe type, AlGaN type, ZnS systems include lens components used in LED die, such as ZnO systems.

LED for lens components of the present invention is not limited in its production method is particularly limited, as described above, as long as to integrate the lens body and the ultraviolet absorbing layer molded for example separately for each resin The lens body molded into a predetermined shape according to a conventional method and the ultraviolet absorbing layer can be bonded using, for example, an adhesive such as a silicone-based adhesive, or can be integrated by the above-described cross-linking adhesive or the like. . On the other hand, if the lens body and the ultraviolet absorbing layer are integrally formed, for example, the lens portion or the ultraviolet absorbing layer portion may be formed by two-color molding, and then the ultraviolet absorbing layer portion or the lens portion may be integrally formed.

LED light source device of the present invention, the housing containing the LED die, which was fitted with a lens component above LED, the type of LED die, LED die described above is preferably used. In the case of the present invention, it is particularly useful as a high-power LED light source device, a white LED light source device, and an LED light source device that is used, for example, as an indicator for a vehicle or an interior lamp. The method for attaching the LED lens to the housing is not particularly limited, and can be attached by appropriate means such as bonding using an appropriate adhesive.

  EXAMPLES Hereinafter, although an Example is given and this invention is demonstrated more concretely, this invention is not limited to the following Example.

[Example 1]
As an ultraviolet absorbing layer, 1 part by mass of ultrafine zinc oxide manufactured by Sumitomo Osaka Cement Co., Ltd. was added to 100 parts by mass of KE951 (0.7% by mass of peroxide C-8A added) manufactured by Shin-Etsu Chemical Co., Ltd. Then, an ultraviolet absorbing sheet having a thickness of 300 μm was prepared by compression molding under conditions of 170 ° C. × 10 minutes using a mold. A silicone primer (FES-1 manufactured by Shin-Etsu Chemical Co., Ltd.) was applied to one surface of the ultraviolet absorbing sheet and dried at room temperature. The lens mold is filled with a fixed amount of silicone resin KJR632 manufactured by Shin-Etsu Chemical Co., Ltd., and an ultraviolet absorbing sheet is placed on it so that no air bubbles enter, and compression molding is performed under conditions of 170 ° C. × 30 minutes. together forming a, an ultraviolet absorbing sheet adhered to give ultraviolet absorbing layer with a lens (LED for lens components).

[Example 2]
A silicone resin KJR632 manufactured by Shin-Etsu Chemical Co., Ltd. was quantitatively filled into a mold, and a lens (lens body) under conditions of 170 ° C. × 30 minutes was produced. 50 parts by mass of ultrafine zinc oxide manufactured by Sumitomo Osaka Cement Co., Ltd. is added to 100 parts by mass of a base material obtained by diluting KJR632 manufactured by Shin-Etsu Chemical Co., Ltd. with toluene 1: 2 as an ultraviolet absorbing layer, and a coating material is prepared. create, dipping performs coating on the entire lens by, and heating under the conditions of 170 ° C. × 30 minutes, to obtain an ultraviolet absorbing layer having a thickness of about 10 [mu] m, to obtain an ultraviolet absorbing layer with a lens (LED for lens components).

[Example 3]
A silicone resin KJR632 manufactured by Shin-Etsu Chemical Co., Ltd. was quantitatively filled into a mold, and a lens (lens body) was produced under the conditions of 170 ° C. × 30 minutes. As a UV absorbing layer, Lumiflon manufactured by Asahi Glass Co., Ltd. is used as a base material, 100 parts by mass of ultrafine zinc oxide manufactured by Sumitomo Osaka Cement Co., Ltd. is added to 100 parts by mass of the base material, and a coating material is prepared. coated by brushing the bottom surface, it is dried, to obtain an ultraviolet absorbing layer having a thickness of about 20 [mu] m, to obtain an ultraviolet absorbing layer with a lens (LED for lens components).

[Example 4]
In Example 1, as a convex lens, a mold subjected to sandblast No. 100 treatment was quantitatively filled with silicone resin KJR632 manufactured by Shin-Etsu Chemical Co., Ltd., compression-molded under conditions of 170 ° C. × 30 minutes, and pear ground was formed. except for molding the lens (lens body) of φ10 having, in the same manner as in example 1 to obtain an ultraviolet absorbing layer with a lens (LED for lens components). This lens with a phosphor layer was used as a light bulb colored LED package (LED light source device) using a light bulb colored LED package.

[Example 5]
The ultraviolet absorbing layer with a lens prepared in Example 3, coated with silicone rubber cap lightly colored thickness 0.3mm in isoindolinone pigments, capped ultraviolet absorbing layer with a lens (LED for lens parts) Got.

[Example 6]
A silicone resin KJR632 manufactured by Shin-Etsu Chemical Co., Ltd. was quantitatively filled into a mold, and a lens (lens body) was produced under the conditions of 170 ° C. × 30 minutes. Using a silicone-based adhesive (KE1825 manufactured by Shin-Etsu Chemical Co., Ltd.), a silicone rubber color sheet having a thickness of 0.3 mm that is lightly colored with a bismuth vanadate pigment as a near-ultraviolet absorbing layer, further using a coating material used in example 3 as an ultraviolet absorbing layer, to form an ultraviolet absorbing layer having a thickness of about 20 [mu] m, to give two layers of ultraviolet absorbing layer with a lens (LED for lens components).

According to the LED lens components of the above embodiment, it is possible to effectively prevent the ultraviolet radiation from both the LED light source device leaks to the outside of the LED light source device.

LED for lens components of the application of the present invention is not particularly limited, for example, blue indicator traffic lights, yellow display, red display, stop lamp, the color indicator such as a display, for general lighting It can be suitably used as a lens for an LED light source device used as an automobile light source device, various indicators in an automobile, an interior light, etc., and more particularly when used as a lens for a high output LED light source device, Among them, it is particularly useful as a lens for a white LED light source device used as a white light source for general illumination, a white display for various uses, and the like. And the LED light source device of this invention can be used conveniently as various light source devices, such as a traffic signal apparatus, a display, the object for general illumination, and components for motor vehicles.

It is a schematic sectional drawing of the LED light source device explaining the example of 1 structure of this invention. It is a schematic sectional drawing of the conventional LED light source device.

DESCRIPTION OF SYMBOLS 1, 1 'LED lens 2, 2' LED light source device 11 Lens body 12 Ultraviolet absorption layer 24 LED die (light emitting element)

Claims (10)

A light emitting diode light source device with a lens is manufactured by attaching a light emitting diode light source device body including a housing having an opening serving as a light emitting surface and a light emitting diode element housed in the housing so as to cover the opening. A lens part for a light-emitting diode used as a lens part for
A lens body formed of silicone resin or silicone rubber having a transmittance of 80% or more in a region of 350 nm to 800 nm;
An ultraviolet absorber selected from silicone resin, silicone rubber and / or fluororesin and selected from ultrafine zinc oxide, titanium oxide and inorganic pigment is 1 to 200 parts by mass with respect to 100 parts by mass of the substrate. And an ultraviolet absorbing layer having a thickness of 1 to 1000 μm,
The ultraviolet absorbing layer is laminated on the surface of the side attached to the LED apparatus main body of the upper Symbol lens body, the ultraviolet rays emitted from the LED apparatus main body, in or outside affect the lens body emitting diode lens component, characterized in that it is a layer which prevents leaks.   The lens component for a light-emitting diode according to claim 1, wherein the surface of the lens body is a grained surface or a pear ground.   3. The light-emitting diode according to claim 2, wherein the surface of the lens body is formed by molding the lens body using a die subjected to sandblasting, bead blasting, or chemical etching. Lens parts.   The light-emitting diode lens component according to claim 1, wherein the lens body contains a diffusing material.   The lens component for a light-emitting diode according to any one of claims 1 to 4, wherein the separately molded lens body and the ultraviolet absorbing layer are integrated.   6. The light-emitting diode device according to claim 5, wherein the material of the lens body and the base material of the ultraviolet absorbing layer are made of a combination of a silicone resin or a silicone rubber and a fluororesin, and the silicone resin or the silicone rubber is crosslinked and bonded to the fluororesin. Lens parts.   7. The lens component for a light emitting diode according to claim 6, wherein an addition reaction curable silicone resin composition or a condensation reaction curable silicone resin composition to which a peroxide or a compound capable of generating a reactive radical is added as a silicone resin or a silicone rubber is used. .   The lens component for a light-emitting diode according to claim 1, comprising two or more ultraviolet absorbing layers.   The light emitting diode lens component according to any one of claims 1 to 8, which is used in a light emitting diode light source device in which a main peak of an emission spectrum of the light emitting diode is set in a range of 350 nm to 570 nm. A light-emitting diode light source device comprising the light-emitting diode lens component according to claim 1.

Images