WO2005091386A1 - 照明装置 - Google Patents
照明装置 Download PDFInfo
- Publication number
- WO2005091386A1 WO2005091386A1 PCT/JP2005/005232 JP2005005232W WO2005091386A1 WO 2005091386 A1 WO2005091386 A1 WO 2005091386A1 JP 2005005232 W JP2005005232 W JP 2005005232W WO 2005091386 A1 WO2005091386 A1 WO 2005091386A1
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- Prior art keywords
- reflector
- substrate
- light emitting
- lens
- light
- Prior art date
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices with at least one potential-jump barrier or surface barrier 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 with at least one potential-jump barrier or surface barrier 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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/10—Bump connectors; Manufacturing methods related thereto
- H01L2224/15—Structure, shape, material or disposition of the bump connectors after the connecting process
- H01L2224/16—Structure, shape, material or disposition of the bump connectors after the connecting process of an individual bump connector
- H01L2224/161—Disposition
- H01L2224/16151—Disposition the bump connector connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive
- H01L2224/16221—Disposition the bump connector connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked
- H01L2224/16225—Disposition the bump connector connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being non-metallic, e.g. insulating substrate with or without metallisation
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/42—Wire connectors; Manufacturing methods related thereto
- H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
- H01L2224/48—Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
- H01L2224/4805—Shape
- H01L2224/4809—Loop shape
- H01L2224/48091—Arched
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/73—Means for bonding being of different types provided for in two or more of groups H01L2224/10, H01L2224/18, H01L2224/26, H01L2224/34, H01L2224/42, H01L2224/50, H01L2224/63, H01L2224/71
- H01L2224/732—Location after the connecting process
- H01L2224/73251—Location after the connecting process on different surfaces
- H01L2224/73265—Layer and wire connectors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/80—Methods for connecting semiconductor or other solid state bodies using means for bonding being attached to, or being formed on, the surface to be connected
- H01L2224/85—Methods for connecting semiconductor or other solid state bodies using means for bonding being attached to, or being formed on, the surface to be connected using a wire connector
- H01L2224/85909—Post-treatment of the connector or wire bonding area
- H01L2224/8592—Applying permanent coating, e.g. protective coating
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/0001—Technical content checked by a classifier
- H01L2924/00011—Not relevant to the scope of the group, the symbol of which is combined with the symbol of this group
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/0001—Technical content checked by a classifier
- H01L2924/00014—Technical content checked by a classifier the subject-matter covered by the group, the symbol of which is combined with the symbol of this group, being disclosed without further technical details
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/15—Details of package parts other than the semiconductor or other solid state devices to be connected
- H01L2924/181—Encapsulation
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices with at least one potential-jump barrier or surface barrier 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 with at least one potential-jump barrier or surface barrier 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
- H01L33/54—Encapsulations having a particular shape
Definitions
- the present invention relates to a lighting device using a light emitting element as a light source.
- a plurality of recessed housing portions are formed on the surface of a substrate, and a metal film is formed on the inner surface of these housing portions.
- a light emitting diode element is provided in each of the housing portions, and a transparent resin layer is filled so as to cover the light emitting diode element.
- Patent Document 1 Japanese Patent Application Laid-Open No. 2002-344031 (Page 45, FIGS. 2A-5B)
- the present invention is regarded as a ship in such a point. Even in a structure in which a reflector or the like is provided on a substrate, heat dissipation can be improved, and peeling or warping of the reflector or the like can be achieved. Optical characteristics It is an object to provide a lighting device that can be maintained.
- the lighting device includes: a substrate; a circuit pattern formed on the substrate; a light emitting element electrically connected to the circuit pattern; a housing for housing the light emitting element; A reflector having a reflective surface on the inner surface of the container and bonded by an adhesive on a substrate on which a circuit pattern is formed; and a visible light conversion layer provided by covering a light-emitting element in a housing of the reflector; On the reflector, a lens provided on the substrate and a lens bonded by the same type of adhesive are provided.
- a circuit pattern, a light-emitting element, a reflector, a visible light conversion layer, and a lens are arranged on a substrate, and the reflector and the lens are bonded to each other with the same type of adhesive, thereby improving heat dissipation.
- peeling and warping between the substrate, the reflector, and the lens are suppressed to maintain optical characteristics, and deterioration of the visible light conversion layer and the lens is suppressed, and light extraction efficiency is improved.
- the lens can be attached efficiently when manufacturing the substrate. It is desirable that the substrate be made of aluminum or the like having good thermal conductivity, because it can conduct heat from the light emitting element and dissipate heat.
- the storage section may be formed not only on the reflector but also on the substrate side.
- the circuit pattern is, for example, a conductive layer formed on an insulating layer, and may be composed of one layer or a plurality of layers.
- the lighting device according to claim 2 is the lighting device according to claim 1, wherein: a substrate; a circuit pattern formed on the substrate; a light emitting element electrically connected to the circuit pattern; A reflector formed on a substrate on which a circuit pattern is formed, having a housing portion for housing the element and a reflector-side fitting portion formed around the housing portion; and covering the light-emitting element on the housing portion of the reflector. And a visible light conversion layer provided in the above manner.
- the circuit pattern is formed on the substrate and the reflector is also formed, the thermal conductivity between the substrate and the reflector is improved, and the temperature difference between the substrate and the reflector is reduced. The heat dissipation is improved, the separation between the substrate and the reflector is suppressed, and the optical characteristics are maintained.
- the reflector-side fitting portion formed around the housing portion for housing the light-emitting element of the reflector is used.
- a lens can be attached, and the light emitting element and the reflector are accurately aligned with the lens, thereby stabilizing the optical specification.
- the reflector is integrated by, for example, pouring resin into the substrate and integrally molding the resin.
- the reflector-side fitting portion may be concave or convex.
- the circuit pattern is, for example, a conductive layer formed on an insulating layer, and may be composed of one layer or a plurality of layers.
- the lighting device according to claim 3 is the lighting device according to claim 2, further comprising a lens-side fitting portion fitted to the reflector-side fitting portion of the reflector, and fitted to the reflector. It is provided with a lens welded in a state.
- the lens-side fitting portion of the lens to the reflector-side fitting portion of the reflector, the light emitting element and the reflector are accurately aligned with the lens, and the optical specification is stable. Then, the lens is securely fixed to the reflector.
- welding refers to, for example, laser welding, ultrasonic welding, or the like, in which a joint between a substrate and a lens is melted and fixed.
- the substrate in the lighting device according to claim 2 or 3, includes a plurality of light emitting element disposing sections each including a plurality of light emitting elements, and a plurality of light emitting element disposing sections.
- the reflector has a through hole with a locking portion formed therebetween, and the reflector flows resin through the reflecting portion formed on the substrate, which reflects light from the light emitting element, and the through hole with the locking portion of the substrate. And a supporting portion integrally formed with the reflecting portion.
- the reflector is supported on the substrate by a supporting portion formed by flowing resin into the through hole with the locking portion of the substrate, so that peeling of the reflector is more reliably suppressed and the optical characteristics are improved. Is maintained.
- the through hole with the locking portion is formed between the light emitting element disposing portions, but is preferably formed substantially at the center between the light emitting element disposing portions. This is because it is possible to uniformly support the support portion of the reflector provided in the above. Further, the through hole with the locking portion may not be formed between the light emitting element disposing portions as long as the supporting portion of the reflector does not lose the substrate force.
- the lighting device according to claim 6 is the lighting device according to any one of claims 1 to 5, wherein the visible light conversion layer is formed of a silicone resin, an epoxy resin, and a modified epoxy resin. It is formed by being dispersed in any one of the above.
- the visible light conversion layer In the visible light conversion layer, light in the visible light region can be easily extracted by dispersing the visible light conversion substance in one of silicone resin, epoxy resin, and modified epoxy resin.
- the lighting device according to claim 7 is the lighting device according to any one of claims 1 to 5, wherein the light receiving element is covered on the housing portion of the reflector to form two resin layers,
- the light conversion layer is the upper resin layer of the two resin layers, and is formed by sedimentation of a visible light conversion substance into one of silicone resin, epoxy resin and modified epoxy resin. It has been done.
- the upper resin layer of the two resin layers formed by coating the light-emitting element on the housing portion of the reflector is formed by converting the visible light converting substance into silicone resin, epoxy resin and modified resin. Since the visible light conversion layer is settled on any one of the epoxy resins, much light in the visible light region can be easily extracted, and the light extraction efficiency can be increased.
- the circuit pattern, the light emitting element, the reflector, the visible light conversion layer, and the lens are arranged on the substrate, and the reflector and the lens are bonded by the same type of adhesive.
- heat dissipation can be improved, separation and warpage between the substrate, reflector and lens can be suppressed, optical characteristics can be maintained, and light extraction efficiency can be reduced by suppressing deterioration of the visible light conversion layer and lens.
- the lens can be efficiently attached at the time of manufacturing the substrate.
- the thermal conductivity between the substrate and the reflector is improved, and the substrate and the reflector are Temperature The difference can be reduced, the heat dissipation can be improved, the separation between the substrate and the reflector can be suppressed, the optical characteristics can be maintained, and the reflector side fitting formed around the housing for housing the light emitting element of the reflector
- a lens can be attached, the light emitting element and the reflector can be accurately aligned with the lens, the optical specification can be stabilized, and the lens can be securely fixed to the reflector. it can.
- the lens-side fitting portion of the lens is fitted and welded to the reflector-side fitting portion of the reflector.
- the reflector is formed by flowing resin through the through hole with the locking portion of the substrate. Since the substrate can be supported by the support portion, peeling of the reflector can be more reliably suppressed, and optical characteristics can be maintained.
- the housing portion has an opening diameter on the lens side and an opening diameter on the substrate side.
- B is the depth
- h is the depth
- the light extraction efficiency from the housing can be optimized, and the design of the housing can be simplified.
- the visible light conversion layer includes a visible light converting substance made of a silicone resin or an epoxy resin. And modified epoxy resin, which can be easily extracted in the visible light range.
- a two-layer structure in which the light-receiving element is coated on the housing of the reflector is formed.
- the upper resin layer of the resin layer is a visible light conversion layer in which a visible light conversion substance is precipitated in one of silicone resin, epoxy resin and modified epoxy resin, and thus is in the visible light region. A large amount of light can be easily extracted, and the light extraction efficiency can be increased.
- FIG. 1 is a sectional view of a light emitting module of a lighting device showing a first embodiment of the present invention.
- FIG. 2 is a front view of the light emitting module.
- FIG. 3 is a front view of the lighting device.
- FIG. 4 is an explanatory view of an example of a combination of materials for a light emitting module.
- FIG. 5 is a cross-sectional view of a mounting structure of a light-emitting diode element of a lighting device according to a second embodiment of the present invention.
- FIG. 6 is a cross-sectional view of a mounting structure of a light-emitting diode element of a lighting device according to a third embodiment of the present invention.
- FIG. 7 is a cross-sectional view of a light-emitting module of a lighting device according to a fourth embodiment of the present invention.
- FIG. 8 is a cross-sectional view of a lighting device according to a fifth embodiment of the present invention.
- FIG. 9 is a cross-sectional view of a lighting device according to a sixth embodiment of the present invention.
- FIG. 10 is a front view of a light-emitting module of a lighting device according to a seventh embodiment of the present invention.
- FIG. 11 is a cross-sectional view of the light-emitting module.
- FIG. 12 is a cross-sectional view of a light-emitting module of a lighting device according to an eighth embodiment of the present invention.
- FIG. 13 is a cross-sectional view of a part of a light-emitting module of a lighting device according to a ninth embodiment of the present invention.
- FIG. 14 is a plan view of a substrate of the lighting device.
- FIG. 15 is a cross-sectional view of a light emitting module and a fixture main body of the lighting device.
- FIG. 16 is a plan view of a light emitting module and a fixture body of the lighting device.
- FIGS. 1 to 4 show a first embodiment
- FIG. 1 is a sectional view of a light emitting module of a lighting device
- FIG. 2 is a front view of a light emitting module
- FIG. FIG. 4 is an explanatory diagram of a combination example of the materials of the light emitting module.
- reference numeral 11 denotes a lighting device, and the lighting device 11 is formed in a square and thin shape.
- the device main body 12 has a rectangular opening 13 formed in the surface of the device main body 12.
- a plurality of rectangular light emitting modules 14 are arranged in a matrix in the opening 13, and the plurality of light emitting modules 14 are provided. Thus, a light emitting surface 15 is formed.
- each light-emitting module 14 has a chip-shaped light-emitting diode element 21 which is a solid-state light-emitting element as a light-emitting element.
- the substrate 22 made of a material having high thermal conductivity, such as resin, aluminum, and aluminum nitride, is arranged in a matrix on one surface side.
- One surface of the substrate 22 is an insulating layer that is a thermosetting resin or a thermoplastic resin having an elasticity lower than that of the epoxy resin, higher than that of the engineering plastic, and having insulating properties and thermal conductivity.
- An adhesive 23 is applied, and a conductive layer 24 of, for example, copper, gold, nickel, or the like is bonded and arranged via a first insulating layer 23a formed of the adhesive 23.
- a circuit pattern 25 is formed by the conductive layer 24, and a light emitting element disposing portion 26 for mounting the light emitting diode element 21 is formed on the circuit pattern 25 in a matrix.
- one electrode of the light emitting diode element 21 is connected to one electrode pattern of the circuit pattern 25 by die bonding using a silver paste as the connection layer 38, and the other electrode is connected to the circuit. It is connected to the other pole pattern of the pattern 25 by a wire 27 by wire bonding.
- a reflector 28 made of a material having high heat resistance and high reflection properties such as aluminum nitride is bonded and arranged.
- the reflector 28 is provided with a plurality of accommodation sections 29 in which the light emitting diode elements 21 are arranged in an accommodated state, respectively, corresponding to the light emitting element arrangement sections 26.
- Each accommodating portion 29 is provided on the lens 33 side, that is, the back side, where the opening diameter A on the lens 33 side, that is, the front side, which is opposite to the substrate 22 side, is larger than the opening diameter B on the substrate 22 side, that is, the back side.
- the lateral force is expanded toward the front surface side, and a reflecting surface 30 which is inclined toward the inside of the housing portion 29 is formed.
- a reflection film having a high light reflectance such as white silicon oxide, copper, nickel, or aluminum may be formed.
- the housing portion 29 is filled with a visible light conversion layer 32 so as to cover the light emitting diode element 21.
- the visible light converting layer 32 is formed by dispersing a visible light converting substance such as a phosphor for converting ultraviolet light from the light emitting diode element 21 into visible light in, for example, silicone resin, epoxy resin, and modified epoxy resin. ing.
- thermosetting resin used for the substrate 22
- thermoplastic resin used for the substrate 22
- thermoplastic resin used for the lens 33.
- the lens 33 has a lens portion 34 formed in a lens shape corresponding to each of the light emitting diode elements 21, and each lens portion 34 has a concave incident surface where light is incident opposite the housing portion 29.
- a surface 35 is formed, and a reflecting surface 36 for reflecting light incident on the incident surface 35 and an emitting surface 37 for emitting light incident on the incident surface 35 and light reflected on the reflecting surface 36 are formed.
- the light emitting surface 15 common to the light emitting module 14 is formed by the light emitting surface 37 of the plurality of lens portions 34.
- FIG. 4 shows a substrate 22, an adhesive 23 (a first insulating layer 23a, a second insulating layer 23b, and a third insulating layer 23c), a conductive layer 24, a reflector 28, and a lens 33.
- Examples 1, 2, 3, and 4 of the combinations of the above materials are shown.
- Combination examples 2, 3, and 4 show only combinations of materials different from combination example 1.
- the light emitting diode element 21 When the light emitting diode element 21 is turned on, the light of the light emitting diode element 21 is incident on the visible light conversion layer 32, and the light incident on the visible light conversion layer 32 is transmitted from the housing 29 to the lens 33.
- the light directly enters the incident surface 35 or is reflected by the reflecting surface 30 or one surface of the substrate 22, enters the incident surface 35 of the lens 33 from the housing portion 29, and exits from the exit surface 37, that is, the light emitting surface 15 through the lens 33.
- a similar adhesive 23 which is a thermosetting resin or a thermoplastic resin having a lower elastic modulus than an epoxy resin and higher than an engineering plastic.
- the adhesive fixation absorbs the difference in thermal expansion, suppresses the occurrence of peeling, and can reliably maintain the adhesive fixation state.
- a conductive layer 24 a light emitting diode element 21, a reflector 28, a visible light conversion layer
- the lens 33 can be attached at the time of manufacturing the substrate, which is efficient.
- the shape of the housing portion 29 is such that the opening diameter on the lens 33 side is A, the opening diameter on the substrate 22 side is B, the depth of the housing portion 29 is h, and the shape of the housing portion 29 is enlarged from the substrate 22 side to the lens 33 side.
- the opening angle is ⁇
- the visible light conversion layer 32 that covers the light emitting diode element 21 is provided in the accommodating portion 29, for example, ultraviolet light can be converted into visible light, and a large amount of light in the visible light region can be extracted. Efficiency can be increased.
- the visible light conversion layer 32 is formed by dispersing a visible light conversion material into one of silicone resin, epoxy resin and modified epoxy resin, and can be easily formed.
- one electrode of the light emitting diode element 21 is formed of gold Z tin on the tin conductive layer 24.
- the connection may be made by the connection layer 38.
- the circuit pattern 25 of the tin conductive layer 24 is used.
- the two electrodes of the light emitting diode element 21 are connected to the two electrode patterns by the connection layer 38 of the gold bump.
- FIG. 7 shows a fourth embodiment.
- FIG. 7 is a cross-sectional view of the light emitting module of the lighting device. Note that the basic configuration of the lighting device 11 is the same as that of the first embodiment.
- One electrode of the light-emitting diode element 21 is connected to the circuit pattern 25 of the conductive layer 24 formed in the light-emitting element disposition section 26 at the bottom of the accommodation section 29 by die bonding with the silver paste connection layer 38, The other electrode of the light emitting diode element 21 is connected by wire bonding using a wire 27.
- the housing portion 29 is formed with two transparent resin layers 40 and 41 covering the light emitting diode element 21.
- the lower resin layer 40 that directly covers the light emitting diode element 21 is made of, for example, silicone resin having elasticity that is strong against ultraviolet light, and a diffusing agent that diffuses visible light and ultraviolet light from the light emitting diode element 21 is dispersed therein. I have.
- the upper resin layer 41 is made of a silicone resin, an epoxy resin, a modified epoxy resin, or the like, and is made of a visible light converting material such as a phosphor that converts ultraviolet light from the light emitting diode element 21 into visible light. It is configured as a visible light conversion layer 32 in which water has settled.
- the upper resin layer 41 of the two resin layers 40 and 41 covering the light emitting diode element 21 provided in the accommodating portion 29 is the visible light conversion layer 32 in which the visible light conversion substance is settled. Therefore, a large amount of light in the visible light region can be easily extracted, and the light extraction efficiency can be increased.
- the visible light converting substance can be efficiently irradiated with visible light and ultraviolet rays emitted from the lower resin layer 40, and the thickness of the upper resin layer 41 can be arbitrarily set. Can be set to
- the light emitted from the light emitting diode element 21 can be evenly applied to the boundary surface with the upper resin layer 41.
- the wire 27 When the wire 27 is located at the boundary between the two resin layers 40 and 41, it causes color unevenness.
- the height position of the wire 27 also determines the force such as the height of the light emitting diode element 21, the hardness of the wire 27, and workability. Therefore, when the height of the light-emitting diode element 21 is about 75 m and the bottom force of the housing 29 is 200 ⁇ m in height to the highest position of the wire 27, the lower resin layer 40 It is preferable that the thickness is 250 / ⁇ and the thickness of the upper resin layer 41 is 750 / zm. Also, the bottom force of the housing 29 is 425 m when the height of the wire 27 to the highest position is 425 m.
- the thickness of the lower resin layer 40 is 475 ⁇ m, and the thickness of the upper resin layer 41 is 525 ⁇ m. Therefore, the depth of the containing section 29 is optimally 800-1200 ⁇ m, and more preferably 1000 ⁇ m.
- inorganic nanoparticles which are fillers of not more than ⁇ , are dispersed in the lower resin layer 40.
- nanoparticles nano-silica with a narrow viscosity distribution of 50 nm or less is used.
- the weight component is 0.1% to 60%, and the visible light transmittance is 50% to 90%.
- the heat transfer coefficient to the substrate 22, the reflector 28, the lens 33, and the like is improved, and the heat dissipation can be improved.
- FIG. 8 shows a fifth embodiment.
- FIG. 8 is a cross-sectional view of the lighting device. Note that the basic configuration of the lighting device 11 is the same as that of the first embodiment.
- a case 44 made of a metal such as aluminum is provided for positioning and fixing the substrate 22, the reflector 28 and the lens 33 and dissipating heat.
- a base 45 is formed in the case 44 so that the substrate 22 comes into surface contact with the base 22, and side surfaces 46 for holding both sides of the substrate 22, the reflector 28 and the lens 33 are formed from both sides of the base 45.
- a claw portion 47 that engages with the lens 33 and that sandwiches the substrate 22, the reflector 28, and the lens 33 is formed at the tip of the side portion 46 with the lens 33.
- the case 44 can position and fix the substrate 22, the reflector 28, and the lens 33, and can improve heat dissipation.
- the positional relationship between the lens 28 and the lens 33 can always be kept constant, and the optical characteristics can be stabilized.
- FIG. 9 shows a sixth embodiment.
- FIG. 9 is a cross-sectional view of the lighting device.
- the basic configuration of the lighting device 11 is the same as that of the first embodiment.
- a resin sheet 50 containing a phosphor and having a thickness of about 0.5 mm is attached to the surface of the reflector 28 on the front side of the light emitting module 14 in this embodiment.
- the resin sheet 50 As a method of attaching the resin sheet 50, the resin sheet 50 is attached in a state where the resin layer 51 to be filled in the housing portion 29 is filled up to the opening surface of the housing portion 29, and the resin layer 51 ⁇ Adhere the resin sheet 50.
- the bonding surface of the resin sheet 50 is semi-cured and the resin sheet 50 is bonded to the surface of the reflector 28, and then the resin sheet 50 is bonded by applying heat. In any case, the resin sheet 50 can be easily bonded without using an adhesive.
- the light extraction efficiency can be improved by making the refractive index of the resin sheet 50 and that of the resin layer 51 substantially the same.
- the thickness of the adhesive is set to 1Z4 or less of the thickness of the resin sheet 50.
- the film pressure of the adhesive is larger than 1Z4, which is the thickness of the resin sheet 50, the stress of the adhesive increases, and the resin sheet 50 is easily peeled or deformed.
- the lighting device 11 may be configured by a single light-emitting module in which the light-emitting modules 14 are integrally formed with a plurality of light-emitting modules 14 arranged in a matrix.
- FIGS. 10 and 11 show a seventh embodiment.
- FIG. 10 is a front view of the light emitting module
- FIG. 11 is a sectional view of the light emitting module. Note that the basic configuration of the lighting device 11 is the same as that of the first embodiment.
- a base 61 is formed of a metal substrate 22, a first insulating layer 23a provided on the substrate 22, a circuit pattern 25 provided on the first insulating layer 23a, and the like. I have.
- a plurality of light emitting element disposition portions 26 formed at equal intervals in a circuit pattern 25 for disposing the light emitting diode elements 21 and a portion between adjacent light emitting element disposition portions 26 are formed.
- the central portion has a through hole 62 with a locking portion formed through the substrate 22.
- An opening width is formed in the through hole 62 with the locking portion at the end of the other surface of the substrate 22 opposite to the one surface of the substrate 22 on which the reflector 28, the lens 33, and the like are disposed.
- the widened locking part 63 is expanded. ing.
- the reflector 28 is provided on one surface side of the substrate 22 to reflect the light from the light emitting diode element 21, and the supporting portion provided to penetrate through the through hole 62 with the locking portion. It has 65 and is disposed on the base 61.
- the reflecting portion 64 and the supporting portion 65 of the reflecting body 28 are integrally formed, and the resin flows into the locking portion 63 by pouring the resin into the through hole 62 with the locking portion. Then, the support portion 65 is fitted with the locking portion 63 so that the reflector 28 does not come off the substrate 22.
- the through-hole 62 with a locking portion is preferably formed in a central portion between the light emitting element disposition portions 26, and this is because the reflector 28 provided in the through-hole 62 with a locking portion is formed. This is because the support portions 65 can be uniformly supported as a whole. Further, the through hole 62 with the locking portion may not be formed between the light emitting element disposing portions 26.
- the through-hole 62 with the locking portion is opposite to the one surface of the substrate 22 on which the reflector 28, the lens 33 and the like are provided. It may be constituted by a tapered hole having a tapered shape expanding toward the other surface side of the substrate 22 which is the side. In this case, the locking portion 63 is formed by the tapered hole itself.
- the taber holes have the function of flowing resin smoothly.
- FIGS. 13 to 16 show a ninth embodiment.
- FIG. 13 is a cross-sectional view of a part of a light-emitting module of the lighting device
- FIG. 14 is a plan view of a substrate of the lighting device
- FIG. 15 is a cross-sectional view of a light-emitting module and a fixture body of the lighting device
- FIG. It is a top view of a module and an apparatus main body.
- the lighting device 71 has a plurality of light emitting modules 72 and a fixture body 73 to which these light emitting modules 72 are attached.
- Each light emitting module 72 includes a substrate 81, and a plurality of light emitting modules arranged on one surface 81a of the substrate 81.
- the device includes a light-emitting diode element 82 which is a solid-state light-emitting element, a reflector 83 that reflects light from each light-emitting diode element 82, and a lens body 84 that controls light from each light-emitting diode element 82.
- three light emitting diode elements 82 are arranged at equal intervals in the vertical and horizontal directions of the substrate 81, that is, arranged in a matrix.
- the substrate 81 is preferably formed of a material having high thermal conductivity such as aluminum, or formed of a material having high thermal conductivity such as glass epoxy resin, engineering plastic, or aluminum nitride.
- the substrate 81 has a mounting area 86 in which a plurality of light emitting diode elements 82 are arranged, and an insertion part 87 protruding outward from one edge of the light emitting element arrangement part 86.
- a square fitting groove 88 is formed at the center of the frame.
- one surface 81a of the substrate 81 is provided with an adhesive such as a thermosetting resin or a thermoplastic resin such as a polyimide resin or an epoxy resin, or an inorganic material. It is an insulating and heat conductive material such as metal powder. Its tensile elastic modulus changes with temperature within 2000MPa, and the insulating layer 89 is formed with a thickness of 75m or less. If the thickness is greater than the thickness of the insulating layer 89, sufficient thermal conductivity cannot be obtained between the substrate 81 and the reflector 83, and the thinner the insulating layer 89, the better the thermal conductivity. The lower limit of the thickness of the layer 89 is a value at which insulation can be obtained.
- a circuit pattern 90 is formed on the insulating layer 89 of the substrate 81, and the light emitting diode elements 82 are electrically connected and mechanically fixed on the circuit pattern 90.
- the circuit pattern 90 is divided into portions corresponding to the light emitting element disposing portions 91 of the respective light emitting diode elements 82, and is formed into a pattern in which a plurality of light emitting diode elements 82 can be connected in series.
- the light emitting diode element 82 is mounted on the light emitting element disposition portion 91 of one circuit pattern 90, and one terminal of the light emitting diode element 82 is electrically connected and mechanically fixed. Then, the other electrode of the light emitting diode element 82 is electrically connected to the connection position 92 of the other circuit pattern 90 by wire bonding.
- Each of the circuit patterns 90a located at both ends when a plurality of light emitting diode elements 82 are connected in series is respectively extended to the insertion portion 87, and is placed on each circuit pattern 90a of the insertion portion 87.
- a power receiving unit 93 as an electrode is formed. That is, the power receiving unit 93 is formed on one surface 81a of the substrate 81 on which the light emitting diode element 82 is disposed.
- the circuit pattern 90 is formed on the first metal layer 94 formed on the insulating layer 89 with a material such as copper foil having excellent electric conductivity and heat conductivity, and formed on the first metal layer 94.
- the second metal layer 95 which is a highly reflective metal layer such as a nickel plating layer, and the third metal layer 96 such as a copper plating layer having excellent electrical and thermal conductivity formed on the second metal layer 95.
- the third metal layer 96 has a light emitting element disposing portion 91, a connection position 92, and a power receiving portion 93, respectively.
- the reflector 83 is formed in direct contact with the light emitting element disposition portion 86 on one surface 81a of the substrate 81.
- the reflector 83 is formed on one surface 81a of the substrate 81.
- a resin material having high heat resistance and high reflectivity such as polybutylene terephthalate (PBT) or polycarbonate, is poured into the rough surface of the light emitting element disposition portion 86 and molded to be integrated with the substrate 81. .
- the reflector 83 is provided with a plurality of recessed portions 98 for accommodating the respective light emitting diode elements 82 corresponding to the positions of the respective light emitting diode elements 82.
- a reflection surface 99 is formed to expand toward the lens body 84 opposite to the side 81 and reflect light.
- the housing 98 is filled with a visible light conversion layer 100 so as to cover the light emitting diode element 82.
- the visible light conversion layer 100 is formed of a phosphor that converts ultraviolet light of the light emitting diode element 82 into visible light. Is dispersed in, for example, silicone resin, epoxy resin and modified epoxy resin.
- a groove-shaped reflector-side fitting portion 101 is provided around each of the housing portions 98 and slightly away from the opening edge of the housing portion 98. It is formed in a ring shape.
- the lens body 84 is disposed on the light emitting element disposing portion 86 on the one surface 81a of the substrate 81, and has a light transmitting property such as polycarbonate and acrylic resin. It is made of a resin material.
- This lens body 84 has a plurality of lenses 103 arranged corresponding to the positions of the respective light emitting diode elements 82, and each lens 103 faces the light emitting diode element 82 and the reflection surface 99 of the reflector 83.
- the concave incident surface 104 where light enters A reflecting surface 105 that reflects the light incident from the incident surface 104 and an emitting surface 106 that emits the light incident on the incident surface 104 and the light reflected by the reflecting surface 105 are formed.
- the plurality of lenses 103 are connected and integrally formed on the emission surface 106 side, and the integrated emission surface 106 forms the light emitting surface 107 of the lens body 84.
- the reflecting surface 105 of each lens 103 is independent, and a gap 108 is formed between the outer surfaces of the reflecting surface 105 of each lens 103 so as to face the substrate 81, that is, the reflector 83.
- Each lens 103 has an annular joining surface 109 formed between the incident surface 104 and the reflecting surface 105 and joined to the surface of the reflector 83.
- the joining surface 109 has a reflector-side fitting portion 101
- the convex lens-side fitting portion 110 that fits into is formed in an annular shape.
- the lens-side fitting portion 110 of the lens 103 is fitted to the reflector-side fitting portion 101 of the reflector 83 and welded by laser welding, ultrasonic welding, or the like.
- the light emitting diode element 82 and the reflector 83 and the lens 103 can be accurately positioned, and the optical specification can be stabilized, and the lens 103 can be fixed to the reflector 83 reliably.
- the reflector 83 is melted and welded to the reflector 83 and the lens 103, and the lens 103 is not melted.
- the appliance main body 73 is a plate-shaped main body formed of a material having high thermal conductivity such as glass epoxy resin, engineering plastic, aluminum, and aluminum nitride.
- a plurality of light emitting modules 72 are arranged on an arrangement surface 121a, which is one surface of the main body 121, by joining the other surface 81b of the substrate 81 thereto.
- the holding portion 122 has a holding member 123 attached to an edge of the main body 121, and an insertion groove 124 is formed between the holding member 123 and the main body 121 so that the insertion portion 87 can be inserted and removed.
- the insertion groove 124 is provided with a fitting projection 125 in which the fitting groove 88 of the insertion section 87 fits, corresponding to the arrangement position of each light emitting module 72.
- Wiring boards 126 are mounted on the holding member 123 facing the mounting surface 121a of the main body 121, respectively, and connectors 127 are mounted on the wiring boards 126, respectively.
- Each of these connectors 127 includes a connector body 128 attached to each wiring board 126, and a A terminal piece 129 made of elastically deformable spring steel protruding toward the arrangement surface 121a of the 121 is provided.
- each terminal strip 129 When the 87 is inserted, the terminal strips 129 elastically deform to allow the insertion of the insertion section 87, and with the insertion section 87 of the board 81 inserted, each terminal strip 129 is connected to each power receiving section 93 of the insertion section 87. It is pressed and electrically connected. Therefore, each connector 127 is configured as the power supply unit 70.
- the lighting device is configured by combining the lighting device 71 with a lighting device (not shown) that is connected to the power supply unit 130 of the fixture body 73 and turns on the light emitting diode element 82 of the light emitting module 72.
- the other surface 81 b of the substrate 81 of the light emitting module 72 is joined and arranged on the arrangement surface 121 a of the body 121 of the fixture body 73, and the substrate 81 is placed on the body 121. While sliding with, align the fitting groove 88 of the insertion portion 87 of the board 81 with the fitting projection 125 of the holding portion 122, and insert the insertion portion 87 of the board 81 into the insertion groove 124 of the holding portion 122. Insert.
- the insertion portion 87 contacts the terminal strip 129 of each connector 127, and further inserts the insertion portion 87 of the substrate 81.
- the terminal piece 129 of each connector 127 is elastically deformed, and the insertion portion 87 can be inserted to a predetermined insertion position.
- terminal piece 129 of each connector 127 that is, each power supply portion 130, can be electrically connected to each power receiving portion 93 of insertion portion 87 by pressing.
- the other surface 81b of the substrate 81 of the light emitting module 72 is disposed on the main body 121 of the device main body 73, and the insertion portion 87 of the substrate 81 is simply inserted into the holding portion 122. It can be easily attached to the instrument body 73.
- Adhere. In this manner, the other surface 81b of the substrate 81 is brought into close contact with the arrangement surface 121a of the main body 121, so that the light emitting module 72 can be positioned and the light emitting method of the light emitting diode element 82 having high directivity can be achieved.
- Direction can be stabilized and the heat dissipation from the board 81 to the main body 121 can be improved.
- a plurality of light emitting diode elements 82 of the light emitting module 72 can be turned on by supplying power to the light emitting module 72 through a lighting device power supply unit 120 (not shown).
- the heat generated when the plurality of light emitting diode elements 82 are turned on can be efficiently transmitted to the substrate 81 having excellent thermal conductivity. Further, since the substrate 81 is in close contact with the main body 121, the light emitting diode elements are provided. The heat of 82 can be efficiently transmitted from the substrate 81 to the main body 121, and the heat dissipation can be improved.
- the thickness of the substrate 81 and the reflector 83 is reduced.
- the thermal conductivity between the substrate 81 and the reflector 83 is reduced, that is, a large difference in thermal expansion between the substrate 81 and the reflector 83 is reduced.
- separation between the substrate 81 and the reflector 83 can be prevented.
- the reflector 83 can be directly adhered to the substrate 81 by pouring and molding resin onto the substrate 81, an adhesive layer for bonding the reflector 83 with an adhesive is not interposed. In addition, the thermal conductivity between the substrate 81 and the reflector 83 can be further improved.
- the plurality of circuit patterns 90 connecting the plurality of light emitting diode elements 82 are provided in the same area, the temperature difference due to the difference in the heat radiation capacity of the plurality of light emitting diode elements 82 can be reduced, and the plurality of light emitting diodes 82 Variation in brightness of the diode element 82 can be reduced.
- the heat of the plurality of light emitting diode elements 82 is transmitted to the reflector 83 and the lens body 84, and radiates heat from the reflector 83 and the lens body 84 to the outside. Further, since a gap 108 is provided between the lenses 103 of the lens body 84 so as to face the reflector 83, air flows through the gap 108, and the hot air warmed by the reflector 83 and the lens 103 and the outside air. As a result, convection is generated, and heat dissipation can be improved.
- the lens-side fitting portion 110 of the lens 103 is fitted and welded to the reflector-side fitting portion 101 of the reflector 83, the light emitting diode element 82 and the reflector 83 and the lens 103 are connected.
- the positioning can be performed accurately, the optical specification can be stabilized, and the lens 103 can be securely fixed to the reflector 83.
- the lens 103 Since the reflector 83 is melted and welded between the reflector 83 and the lens 103, the lens 103 does not melt and the lens 103 is melted. The optical characteristics of the lens 103 can be prevented from being impaired.
- the insertion portion 87 of the substrate 81 of the light emitting module 72 is attached to the device main body.
- the electrical and mechanical connection of the light emitting module 72 is released and the light emitting module 72 can be easily removed.
- the fitting structure between the reflector-side fitting portion 101 of the reflector 83 and the lens-side fitting portion 103 of the lens 103 is such that the reflector-side fitting portion 101 is concave and the lens-side fitting portion 110 is convex.
- a similar effect can be obtained even if the unevenness is reversed.
- the present invention is used for fixed lighting for indoors and outdoors, mobile lighting for vehicles, and the like.
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP05727173A EP1737049A1 (en) | 2004-03-24 | 2005-03-23 | Lighting system |
US10/599,276 US20080239724A1 (en) | 2004-03-24 | 2005-03-23 | Illuminating Device |
JP2006511301A JPWO2005091386A1 (ja) | 2004-03-24 | 2005-03-23 | 照明装置 |
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004-086667 | 2004-03-24 | ||
JP2004086667 | 2004-03-24 | ||
JP2004285726 | 2004-09-30 | ||
JP2004-285726 | 2004-09-30 | ||
JP2004347348 | 2004-11-30 | ||
JP2004-347348 | 2004-11-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005091386A1 true WO2005091386A1 (ja) | 2005-09-29 |
Family
ID=34993987
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2005/005232 WO2005091386A1 (ja) | 2004-03-24 | 2005-03-23 | 照明装置 |
Country Status (5)
Country | Link |
---|---|
US (1) | US20080239724A1 (ja) |
EP (1) | EP1737049A1 (ja) |
JP (1) | JPWO2005091386A1 (ja) |
TW (1) | TWI257184B (ja) |
WO (1) | WO2005091386A1 (ja) |
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JP2012049508A (ja) * | 2010-07-27 | 2012-03-08 | Nitto Denko Corp | 発光ダイオード装置の製造方法 |
JP2015511775A (ja) * | 2012-03-30 | 2015-04-20 | コーニンクレッカ フィリップス エヌ ヴェ | 発光デバイス及び波長変換材料を含む光共振器 |
US9997674B2 (en) | 2012-03-30 | 2018-06-12 | Lumileds Llc | Optical cavity including a light emitting device and wavelength converting material |
US10833227B2 (en) | 2012-03-30 | 2020-11-10 | Lumileds Llc | Optical cavity including a light emitting device and wavelength converting material |
Also Published As
Publication number | Publication date |
---|---|
US20080239724A1 (en) | 2008-10-02 |
JPWO2005091386A1 (ja) | 2008-02-07 |
TWI257184B (en) | 2006-06-21 |
EP1737049A1 (en) | 2006-12-27 |
TW200534515A (en) | 2005-10-16 |
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