WO2011090073A1 - 照明器具 - Google Patents
照明器具 Download PDFInfo
- Publication number
- WO2011090073A1 WO2011090073A1 PCT/JP2011/050872 JP2011050872W WO2011090073A1 WO 2011090073 A1 WO2011090073 A1 WO 2011090073A1 JP 2011050872 W JP2011050872 W JP 2011050872W WO 2011090073 A1 WO2011090073 A1 WO 2011090073A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- led unit
- led
- light
- heat dissipation
- led chip
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
- F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
- F21K9/20—Light sources comprising attachment means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
- F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
- F21K9/60—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
- F21K9/69—Details of refractors forming part of the light source
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S4/00—Lighting devices or systems using a string or strip of light sources
- F21S4/20—Lighting devices or systems using a string or strip of light sources with light sources held by or within elongate supports
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V19/00—Fastening of light sources or lamp holders
- F21V19/001—Fastening of light sources or lamp holders the light sources being semiconductors devices, e.g. LEDs
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V19/00—Fastening of light sources or lamp holders
- F21V19/001—Fastening of light sources or lamp holders the light sources being semiconductors devices, e.g. LEDs
- F21V19/003—Fastening of light source holders, e.g. of circuit boards or substrates holding light sources
- F21V19/0055—Fastening of light source holders, e.g. of circuit boards or substrates holding light sources by screwing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V19/00—Fastening of light sources or lamp holders
- F21V19/04—Fastening of light sources or lamp holders with provision for changing light source, e.g. turret
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
- F21V29/50—Cooling arrangements
- F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
- F21V29/74—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades
- F21V29/75—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with fins or blades having different shapes, thicknesses or spacing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
- F21V29/50—Cooling arrangements
- F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
- F21V29/74—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades
- F21V29/76—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with essentially identical parallel planar fins or blades, e.g. with comb-like cross-section
- F21V29/763—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with essentially identical parallel planar fins or blades, e.g. with comb-like cross-section the planes containing the fins or blades having the direction of the light emitting axis
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V7/00—Reflectors for light sources
- F21V7/04—Optical design
- F21V7/05—Optical design plane
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V17/00—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages
- F21V17/10—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening
- F21V17/16—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening by deformation of parts; Snap action mounting
- F21V17/164—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening by deformation of parts; Snap action mounting the parts being subjected to bending, e.g. snap joints
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2103/00—Elongate light sources, e.g. fluorescent tubes
- F21Y2103/10—Elongate light sources, e.g. fluorescent tubes comprising a linear array of point-like light-generating elements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2113/00—Combination of light sources
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2115/00—Light-generating elements of semiconductor light sources
- F21Y2115/10—Light-emitting diodes [LED]
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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
- H01L2224/44—Structure, shape, material or disposition of the wire connectors prior to the connecting process
- H01L2224/45—Structure, shape, material or disposition of the wire connectors prior to the connecting process of an individual wire connector
- H01L2224/45001—Core members of the connector
- H01L2224/45099—Material
- H01L2224/451—Material with a principal constituent of the material being a metal or a metalloid, e.g. boron (B), silicon (Si), germanium (Ge), arsenic (As), antimony (Sb), tellurium (Te) and polonium (Po), and alloys thereof
- H01L2224/45138—Material with a principal constituent of the material being a metal or a metalloid, e.g. boron (B), silicon (Si), germanium (Ge), arsenic (As), antimony (Sb), tellurium (Te) and polonium (Po), and alloys thereof the principal constituent melting at a temperature of greater than or equal to 950°C and less than 1550°C
- H01L2224/45144—Gold (Au) as principal constituent
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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
- H01L2224/01—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
- H01L2224/484—Connecting portions
- H01L2224/48463—Connecting portions the connecting portion on the bonding area of the semiconductor or solid-state body being a ball bond
- H01L2224/48465—Connecting portions the connecting portion on the bonding area of the semiconductor or solid-state body being a ball bond the other connecting portion not on the bonding area being a wedge bond, i.e. ball-to-wedge, regular stitch
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L25/00—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof
- H01L25/03—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes
- H01L25/04—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers
- H01L25/075—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group H01L33/00
- H01L25/0753—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group H01L33/00 the devices being arranged next to each other
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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
- H01L33/64—Heat extraction or cooling elements
- H01L33/642—Heat extraction or cooling elements characterized by the shape
Definitions
- the present invention relates to a lighting fixture provided with a plurality of light emitting devices using LED chips.
- the LED lamp 200dd disclosed in Patent Document 1 includes a light emitting device 1dd using an LED chip 10dd in a cylindrical pipe 201dd on one side of a long substrate 204dd. It is arranged in the longitudinal direction of 204dd.
- a heat radiating member 205dd for radiating heat generated by the LED unit 202dd is also housed in the pipe 201dd.
- the above-mentioned substrate 204dd is composed of a double-sided printed wiring board whose base material is glass epoxy resin, and the heat dissipation member 205dd is made of aluminum.
- the light emitting device 1dd is a blue LED chip in which the LED chip 10dd emits blue light, and a phosphor (not shown) that emits yellow light when excited by the blue light from the LED chip 10dd on the resin package 11dd. )) Is mixed.
- JP 2009-272072 A paragraphs [0012]-[0028] and FIGS. 1 and 2)
- a heat radiating member 205dd for radiating heat generated in the light emitting device 1dd is housed in the pipe 201dd.
- the size of the member 205dd is limited. Therefore, sufficient heat dissipation characteristics cannot be obtained, and the temperature of the light emitting device 1dd does not exceed the allowable temperature of the light emitting device 1dd (for example, the maximum junction temperature of the LED chip 10dd) even when the light emitting device 1dd having high luminance is used.
- the LED lamp 200dd having the configuration shown in FIG. 16 requires the heat dissipation block 205dd, the LED lamp 200dd itself is expensive.
- a lighting fixture including an LED lamp called a straight tube fluorescent lamp type LED lamp and a lamp dedicated to the LED lamp.
- the present invention has been made in view of the above-mentioned reasons, and its purpose is to suppress an increase in the temperature of the LED chip, to increase the light output, and to suppress the peripheral portion of the light emitting device from becoming dark. It is in providing the lighting fixture which can do.
- a lighting fixture of the present invention includes a long LED unit including a plurality of light emitting devices using LED chips on one side in the thickness direction, a fixture body, and an LED unit held by the fixture body.
- the heat dissipation block is held by the reflecting plate, and the flat surface of the surface from which light is extracted from the light emitting device in the LED unit and the reflecting surface of the reflecting plate. There a peripheral portion of the embedded portion as flush.
- the reflector has an embedded portion in which the LED unit is embedded and embedded in the shape corresponding to the outer peripheral shape of the LED unit, and the heat dissipation block is held by the reflector.
- the size can be increased, and the heat generated in the light emitting device can be efficiently dissipated through the heat dissipating block, so that the temperature rise of the LED chip can be suppressed and the light output can be increased.
- the planar portion of the surface from which light is extracted from the light emitting device in the LED unit and the peripheral portion of the embedding portion in the reflecting surface of the reflecting plate are flush with each other, the periphery of the light emitting device It becomes possible to suppress that a part becomes dark.
- the LED unit is detachably attached to the heat radiating block in a state where the reflector is attached to the instrument body, and the other surface is in surface contact with the heat radiating block.
- the LED unit is detachably attached to the heat radiating block in a state where the reflector is attached to the instrument body, it is possible to remove the reflector from the instrument body. Since the LED unit can be attached to and detached from the heat dissipation block, the LED unit can be easily replaced. Further, according to the present invention, since the other surface of the LED unit is in surface contact with the heat dissipation block, compared with a case where a part of the reflector is interposed between the LED unit and the heat dissipation block. Thus, thermal resistance can be reduced and heat dissipation can be improved.
- planar size of the heat dissipation block is larger than the planar size of the LED unit.
- the heat transferred to the heat dissipation block can be transferred to a wider range, so that the heat dissipation is improved.
- the LED unit can be protected by the translucent cover.
- the translucent cover has a diffusion function for diffusing light from the LED unit.
- the reflection surface of the reflector can be illuminated more uniformly.
- the LED unit includes a plurality of LED modules provided with the same number of the light emitting devices and having the same size as each other and arranged in parallel in the longitudinal direction of the embedded portion.
- the present invention when one of the plurality of light emitting devices that has stopped lighting before the end of its life is generated, it is possible to replace not the entire LED unit but the LED module, thereby reducing the replacement cost. .
- a circuit pattern that defines the connection relationship of the light emitting devices is formed on one surface side opposite to the heat dissipation block side, and a plurality of window holes into which the light emitting devices are inserted are thick.
- a circuit board that penetrates in the direction, and the circuit board is formed with a mirror that reflects light from each of the light emitting devices on the one surface side, and the surface of the mirror is flush with the planar portion. Preferably there is.
- each light emitting device is mounted on a circuit board that defines the connection relationship of each light emitting device in the LED unit, the thermal resistance from each light emitting device to the heat dissipation block.
- the heat dissipation can be improved.
- since the surface of the mirror formed on the circuit board is flush with the planar portion, the peripheral part of the light emitting device is prevented from being darkened due to the circuit board. It becomes possible.
- the light emitting device includes an LED chip, a mounting substrate having a conductive pattern for supplying power to the LED chip on one surface side, the LED chip mounted on the one surface side, and a light distribution of light emitted from the LED chip
- a light emitting color of the LED chip which is excited by the light emitted from the LED chip and transmitted through the sealing part and the optical member.
- a dome-shaped color conversion formed of a phosphor that emits color light and a light-transmitting material, and disposed in such a manner that an air layer is interposed between the one surface side of the mounting substrate and the optical member.
- the color conversion member is emitted from the LED chip and incident on the color conversion member through the sealing portion and the optical member.
- the amount of light scattered to the optical member side and transmitted through the optical member can be reduced, and the light extraction efficiency as a light emitting device can be improved.
- the reflecting surface of the reflecting plate can be illuminated by light scattered by the particles toward the reflecting surface of the reflecting plate and light emitted from the phosphor toward the reflecting surface.
- the mounting substrate is made of a heat conductive material, and the LED chip is mounted on the mounting surface side of the LED chip in the heat transfer plate having the conductive pattern and the conductive pattern on which the LED chip is mounted via a submount member.
- a wiring board comprising a wiring board having a window hole that exposes the submount member extending in the thickness direction, wherein the submount member has a larger planar size than the LED chip and overlaps the LED chip It is preferable that a reflection film that reflects light is formed around the substrate.
- the LED chip is mounted on the heat transfer plate, the thermal resistance from the LED chip to the heat dissipation block is reduced as compared with the case where the LED chip is mounted on the wiring board. It is possible to improve heat dissipation.
- the reflective film for reflecting the light from the LED chip is formed on the submount member, the light emitted from the LED chip is absorbed by the submount member. Therefore, the light extraction efficiency to the outside can be improved.
- the said reflecting plate has the said embedding part by which it opens to the shape according to the outer periphery shape of the said LED unit, and the said LED unit is embedded.
- the reflector has a recess.
- the concave portion has a shape corresponding to the outer peripheral shape of the LED unit.
- the recessed part is formed so that an LED unit may be embedded.
- the reflector has a first height.
- the first height is along the thickness direction of the LED unit.
- the first height of the reflection plate is such that the planar portion of the surface from which light is extracted from the light emitting device in the LED unit and the peripheral portion of the embedded portion on the reflection surface of the reflection plate It is preferable that it is set to be one.
- the reflecting plate has a height adjusting piece.
- the height adjustment piece extends from the reflector toward the heat dissipation block.
- the height adjusting piece extends in the thickness direction of the LED unit.
- the height adjustment piece has the first height in the thickness direction of the LED unit.
- the first height of the height adjusting piece is the same as the planar portion of the surface from which light is extracted from the light emitting device in the LED unit and the peripheral portion of the embedded portion on the reflecting surface of the reflecting plate. Is set to
- the LED unit has a first thickness in the thickness direction of the LED unit.
- the first height and the planar portion of the surface from which light is extracted from the light emitting device in the LED unit and the peripheral portion of the embedded portion in the reflecting surface of the reflecting plate are flush with each other. It is preferable that the first thickness is set.
- the heat dissipation block preferably has a flat surface.
- the reflector and the LED unit are mounted on the plane.
- the first thickness is set equal to the first height.
- the height adjustment piece further has a contact piece.
- the contact piece extends in a direction crossing the thickness direction of the LED unit.
- the contact piece is in surface contact with the heat dissipation block.
- the height adjusting piece further has a contact piece.
- the contact piece extends in a direction orthogonal to the thickness direction of the LED unit.
- the contact piece is in surface contact with the heat dissipation block.
- part of the heat transferred from the LED unit to the heat dissipation block can be efficiently radiated from the reflector. That is, the reflector can be used also as a heat radiating member. Therefore, the heat dissipation block can be made small. Thereby, weight reduction and cost reduction can be achieved.
- the contact piece preferably extends from the height adjustment piece in a direction opposite to the LED unit.
- the height adjusting piece preferably has a first end on one side in the height direction.
- the contact piece extends from the first end of the height adjustment piece in a direction opposite to the LED unit.
- the temperature of the contact piece rises. As the temperature of the contact piece increases, the contact piece expands. However, the contact piece extends in the direction opposite to the LED unit. Therefore, when the temperature of the contact piece rises, the contact piece expands in the direction opposite to the LED unit. In other words, the contact piece does not expand toward the LED unit. Thereby, the clearance gap between a reflecting plate and an LED unit can be kept constant. That is, even when the gap between the reflecting plate and the LED is set narrow, the contact piece does not apply force to the LED unit due to the contact piece expanding.
- the reflecting plate preferably has a recess.
- the concave portion has a shape corresponding to the outer peripheral shape of the LED unit.
- the recess is formed so that the LED unit is embedded.
- the concave portion defines the embedded portion.
- the embedded portion preferably has a peripheral wall and a bottom wall.
- the peripheral wall is defined as a height adjustment piece.
- the bottom wall is defined as the contact piece.
- the LED unit is in contact with the heat dissipation block through the bottom wall.
- the light emitting device includes an LED chip, a mounting substrate on which the LED chip is mounted on one surface side, and an optical element fixed to the one surface side of the mounting substrate in such a manner that the LED chip is accommodated between the mounting substrate. It is preferable to have.
- the optical element has an outer peripheral portion. The outer peripheral portion of the optical element is fixed to the one surface side of the mounting substrate. The planar portion of the surface from which light is extracted is defined by a portion outside the outer peripheral portion.
- the optical element preferably has an optical member.
- the optical member is configured to control the light distribution of the light emitted from the LED chip, and is fixed to one surface of the mounting substrate so that the LED chip is accommodated between the optical member and the dome. Is.
- the optical element preferably further includes a color conversion member.
- the color conversion member includes a phosphor and a translucent material, and the phosphor is excited by light emitted from the LED chip and emits light having a color different from the emission color of the LED chip.
- the color conversion member is disposed in a form in which an air layer is interposed between the color conversion member and the optical member on the one surface side of the mounting substrate, and has a dome shape.
- the lighting fixture further has an attaching means.
- the LED unit is attached to the heat dissipation block by the attachment means.
- the attachment means is preferably constituted by a spring.
- the spring is configured to urge the LED unit toward the heat dissipation block.
- the spring is preferably composed of a leaf spring.
- the leaf spring has a first portion extending from the periphery toward the inside of the periphery. Accordingly, the LED unit is sandwiched between the first portion of the leaf spring and the heat dissipation block.
- the leaf spring further has a second portion.
- the second part extends from the first part in a direction opposite to the heat dissipation block.
- the second part is located between the LED unit and the reflector.
- the LED unit can be easily attached to the heat dissipation block. In this case, the LED unit can be easily detached from the heat dissipation block. The LED unit can be attached to the heat dissipation block so that the LED unit is in close contact with the heat dissipation block.
- the lighting fixture has an attaching means.
- the LED unit is in contact with the reflecting plate by an attaching means.
- the embedded portion has a peripheral edge.
- the peripheral edge has a first inner surface and a second inner surface.
- the second inner surface is opposed to the first inner surface.
- the attachment means is disposed on the first inner surface.
- the LED unit is held by the attachment means and the second inner surface so as to come into contact with the second inner surface of the reflector.
- the heat of the LED unit can be released to the heat dissipation block and the reflector.
- the attachment means is preferably constituted by a spring.
- the spring is configured to urge the LED unit against the second inner surface, whereby the LED unit comes into contact with the second inner surface of the reflector.
- the lighting fixture of Embodiment 1 is shown, (a) is a schematic exploded perspective view, (b) is a principal part schematic sectional drawing. It is a principal part general
- the light-emitting device in a lighting fixture same as the above is shown, (a) is a schematic sectional drawing, (b) is another schematic sectional drawing.
- the lighting device in a lighting fixture same as the above is shown, (a) is a schematic plan view, (b) is a schematic front view, and (c) is a schematic side view.
- (A) is principal part schematic sectional drawing
- (b) is a perspective view of the attachment spring in (a) regarding the other structural example of a lighting fixture same as the above.
- (A) is principal part schematic sectional drawing
- (b) is a perspective view of the attachment spring in (a) regarding the other structural example of a lighting fixture same as the above.
- the luminaire of this embodiment is a ceiling-embedded luminaire, and is a long fixture body 100 that is inserted into the back of a ceiling through a rectangular embedding hole 301 provided in a ceiling material 300 that is a construction material. It has.
- the instrument body 100 is formed by bending both sides of a rectangular plate-like metal plate (for example, a chrome-free galvanized steel plate) in the short-side direction, and a cross section orthogonal to the longitudinal direction is opened downward. U-shaped.
- the instrument main body 100 includes an elongated rectangular plate-shaped main piece 101 and a pair of side pieces 102 extending downward from both side edges of the main piece 101 in the width direction.
- the material of the instrument main body 100 should just be a metal, and is not specifically limited.
- the instrument body 100 has a main piece 101 with two bolt insertion holes 101a through which two mounting bolts 310 suspended from the ceiling are inserted.
- the instrument body 100 can be coupled to the mounting bolt 310 by inserting the mounting bolt 310 through the bolt insertion hole 101 a and tightening the nut 108 through the washer 107 to the mounting bolt 310.
- the main piece 101 of the instrument main body 100 is connected to an external power source (for example, an AC power source composed of a commercial power source, a DC power source, etc.), and a power line hole for drawing in a power source line 320 that is wired in advance on the back of the ceiling 101b is perforated.
- an external power source for example, an AC power source composed of a commercial power source, a DC power source, etc.
- the instrument main body 100 supplies power to a space surrounded by the main piece 101 and both side pieces 102 and a power supply terminal block 119 to which the power line 320 is connected, and the external power supply via the terminal block 119.
- a lighting device 120 for lighting an LED unit 2 described later is housed.
- the lighting device 120 is attached to the instrument main body 100 in a replaceable manner.
- the lighting device 120 stores a printed wiring board 130 on which components (not shown) of a lighting circuit (not shown) for lighting the LED unit 2 are mounted, and the printed wiring board 130. Case 140.
- the case 140 includes a body 141 made of a synthetic resin and having a front opening, and a cover 142 made of a synthetic resin and having a rear opening that is coupled to the front side of the body 141.
- engagement claws 142a project from the rear edges of the side walls of the cover 142 in the short direction toward the rear, and the engagement claws 142a are formed on both side surfaces of the body 141 in the short direction.
- the body 141 and the cover 142 are coupled by engaging with the recess 141a.
- mounting pieces 143 for mounting the case 140 to the instrument main body 100 project in a direction along the longitudinal direction.
- the mounting piece 143 has a mounting hole 143a through which a screw (not shown) whose tip is screwed into a screw hole (not shown) formed in the instrument body 100 is drilled.
- the body 141 and the cover 142 of the case 1 are not limited to those formed of synthetic resin, but may be formed of metal and appropriately combined.
- Two terminal devices 146 and 147 are mounted on the printed wiring board 130 in a portion not covered by the cover 142.
- the terminal devices 146 and 147 are locking springs (not shown) that hold the wires separately between the terminal plates (not shown) to which the wires inserted from the wire insertion holes 146a and 147a are individually connected and the terminal plates.
- a quick-connect terminal (not shown) consisting of (not shown) is internally provided.
- a connection piece (not shown) extending from the terminal board is connected to the printed wiring board 130 by solder.
- Each terminal device 146, 147 is formed with operation holes 146b, 147b for operating a release button (not shown) when releasing the state in which the electric wire is held by the spring force of the locking spring. Yes.
- a release button (not shown) when releasing the state in which the electric wire is held by the spring force of the locking spring.
- One terminal device 146 of the two terminal devices 146 and 147 constitutes a power supply side terminal device to which an electric wire from the terminal block 119 is connected, and the other terminal device 147 is for supplying power to the LED unit 2.
- the load-side terminal device to which the electric wire 330 (see FIG. 4) is connected is configured.
- the lighting fixture of this embodiment is a long LED unit 2 provided with a plurality of light emitting devices 1 using the LED chip 10 on one surface side in the thickness direction, and the light from the LED unit 2 attached to the fixture body 100.
- a metallic reflector 110 that controls the light distribution to be a target.
- the LED unit 2 includes the same number (eight in the illustrated example) of the light emitting devices 1 and a plurality (four in the illustrated example) of LED modules 2a having the same size.
- the reflecting plate 110 is formed of a steel plate and is coated with a so-called highly reflective white powder, and the surface of the coating film constitutes the reflecting surface 110a.
- the material of the reflecting plate 110 is not particularly limited, and for example, aluminum may be adopted.
- the reflector 110 is attached to two reflector adapters 160 attached to both ends of the instrument body 100.
- the reflector adapter 160 is formed in a U shape that is opened downward, and the central piece 161 is attached to the instrument body 100 such that the longitudinal direction of the central piece 161 is perpendicular to the longitudinal direction of the instrument body 100.
- the reflection plate 110 is attached to each central piece 161 of the reflection plate adapter 160 using attachment screws 165 formed of so-called thumb screws.
- the reflection plate 110 is formed with an insertion hole 112 through which each mounting screw 165 is inserted, and the central piece 161 of the reflection plate adapter 160 is formed with a screw hole 161a into which each mounting screw 165 is screwed. ing.
- the reflector 110 is formed in a bowl shape with the lower surface side opened and both ends in the longitudinal direction closed, and a collar part 111 is extended outward from the lower end part, and is inserted into the embedding hole 301 of the ceiling material 300.
- the flange 111 comes into contact with the lower surface of the peripheral portion of the embedding hole 301 in the ceiling material 300.
- the reflection plate 110 has an embedded portion 115 that is opened in a shape (elongated rectangular shape) corresponding to the outer peripheral shape of the LED unit 2 and in which the LED unit 2 is embedded.
- the planar portion of the surface from which light is extracted from the light emitting device 1 in the LED unit 2 and the peripheral portion of the embedded portion 115 in the reflecting surface 110a of the reflecting plate 110 are flush with each other. This point will be described later.
- a bowl-like translucent cover 180 that is formed of a translucent material (for example, acrylic resin) and covers the LED unit 2 is detachably attached to the reflecting plate 110.
- a plurality of (here, four) coupling legs 181 each having a coupling claw 181a (see FIG. 2) at the distal end portion are extended from both end edges along the longitudinal direction.
- the reflection plate 110 is formed with a coupling hole 113 into which the coupling leg 181 is inserted and locked.
- each of the coupling legs 181 of the translucent cover 180 is inserted into the coupling hole 113 of the reflecting plate 110 and the coupling claw 181a is locked to the peripheral portion of the coupling hole 113, so that the translucent cover 180 is reflected by the reflecting plate.
- the translucent cover 180 is detachably attached.
- the both ends of the translucent cover 180 in the longitudinal direction are picked with both hands to release the locking state of the coupling claw 181a to the coupling hole 113, thereby translucent.
- the cover 180 may be pulled down.
- the lighting fixture of this embodiment is arrange
- the heat dissipation block 150 is formed in a long plate shape, and has a plurality of fins 152 (see FIG. 2) on the side opposite to the LED unit 2 side.
- the fins 152 are formed along the longitudinal direction of the heat dissipation block 150 and are arranged at an equal pitch in the short direction of the heat dissipation block 150.
- the heat dissipating block 150 is fixed to the reflector 110 with a fixing screw (not shown). In short, the heat dissipation block 150 is held by the reflector 110.
- the light emitting device 1 includes the LED chip 10 and conductor patterns 23 and 23 for supplying power to the LED chip 10 on one surface side, and the LED chip 10 is mounted on the one surface side. And a rectangular board-shaped mounting board 20.
- the light emitting device 1 also includes an optical member 60 that controls the light distribution of the light emitted from the LED chip 10.
- the optical member 60 is formed in a dome shape with a translucent material, and is fixed to the one surface side of the mounting substrate 20 so as to accommodate the LED chip 10 between the optical member 60 and the mounting substrate 20. In the space surrounded by the optical member 60 and the mounting substrate 20, the LED chip 10 and a plurality of (for example, two) bonding wires 14 electrically connected to the LED chip 10 are sealed.
- the sealing part 50 made of a sealing material is enriched.
- the sealing part 50 is made into a gel by adopting, for example, a silicone resin as a sealing resin.
- the light emitting device 1 is also excited by light emitted from the LED chip 10 and transmitted through the sealing portion 50 and the optical member 60, and emits light of a color different from the emission color of the LED chip 10 and translucency.
- a dome-shaped color conversion member 70 made of a material is provided.
- the color conversion member 70 is disposed on the one surface side of the mounting substrate 20 so as to surround the LED chip 10 and the like with the mounting substrate 20.
- the color conversion member 70 is disposed such that an air layer 80 is formed between the light emitting surface 60 b of the optical member 60 on the one surface side of the mounting substrate 20.
- the mounting substrate 20 has an annular dam portion 27 protruding outside the optical member 60 on the one surface so as to dam the sealing resin overflowing from the space when the optical member 60 is fixed to the mounting substrate 20. Has been.
- the LED chip 10 is a GaN-based blue LED chip that emits blue light, and uses an n-type SiC substrate having a lattice constant and a crystal structure close to GaN as compared to a sapphire substrate and having conductivity as a crystal growth substrate. Yes.
- the LED chip 10 is formed of a GaN-based compound semiconductor material on the main surface side of a SiC substrate, and a light emitting portion made of a laminated structure portion having a double hetero structure, for example, is grown by an epitaxial growth method (for example, MOVPE method). Yes.
- the LED chip 10 has an anode electrode (not shown) formed on one surface side (upper surface side in FIG.
- the cathode electrode and the anode electrode are composed of a laminated film of a Ni film and an Au film.
- the material for the cathode electrode and the anode electrode is not particularly limited as long as it is a material that can provide good ohmic characteristics. For example, Al or the like may be employed.
- the structure of the LED chip 10 is not particularly limited. For example, after the light emitting portion is epitaxially grown on the main surface side of the crystal growth substrate, a support substrate (for example, a Si substrate) that supports the light emitting portion is fixed to the light emitting portion. Then, the crystal growth substrate or the like may be removed.
- the mounting substrate 20 is made of a heat conductive material, and includes the heat transfer plate 21 on which the LED chip 10 is mounted via the submount member 30, and the conductor patterns 23 and 23 described above.
- the wiring board 22 is fixed to the mounting surface side.
- the outer peripheral shapes of the heat transfer plate 21 and the wiring substrate 22 are rectangular, and a rectangular plate-like submount member 30 having a planar size smaller than the heat transfer plate 21 is exposed at the center of the wiring substrate 22.
- a window hole 24 is provided in the thickness direction.
- the LED chip 10 is mounted on the heat transfer plate 21 via the submount member 30 disposed inside the window hole 24 of the wiring board 22. Therefore, the heat generated in the LED chip 10 is transferred to the submount member 30 and the heat transfer plate 21 without passing through the wiring board 22.
- an alignment mark 21 c for increasing the positioning accuracy of the submount member 30 is formed on the one surface of the heat transfer plate 21.
- the wiring board 22 and the heat transfer plate 21 may be fixed via, for example, a polyolefin-based fixing sheet 29 (see FIG. 5).
- Cu is adopted as the heat conductive material of the heat transfer plate 21, but not limited to Cu, for example, Al may be adopted. In short, it is preferable to employ a metal having high thermal conductivity such as Cu or Al as the heat conductive material of the heat transfer plate 21.
- the LED chip 10 is mounted on the heat transfer plate 21 such that the light emitting portion is on the side farther from the heat transfer plate 21 than the crystal growth substrate, but the light emission portion is more heat transfer than the crystal growth substrate. You may make it mount in the heat exchanger plate 21 so that it may become the side close
- the above-mentioned wiring board 22 is provided with a pair of conductor patterns 23 and 23 for feeding power to the LED chip 10 on one surface side of an insulating base material 22a made of a polyimide film. Further, the wiring board 22 is laminated with a protective layer 26 made of a white resist (resin) covering the conductor patterns 23 and 23 and the insulating base material 22a where the conductor patterns 23 and 23 are not formed. . Therefore, since the light from the LED chip 10 and the light from the phosphor of the color conversion member 70 are reflected by the surface of the protective layer 26, the light emitted from the LED chip 10 and the phosphor is absorbed by the wiring board 22. Therefore, the light output can be improved by improving the light extraction efficiency to the outside.
- each conductor pattern 23 and 23 is formed in the outer periphery shape a little smaller than half of the outer periphery shape of the insulating base material 22a.
- FR4, FR5, paper phenol or the like may be employed as the material of the insulating base material 22a.
- the protective layer 26 is patterned so that two portions of the conductor patterns 23 and 23 are exposed in the vicinity of the window hole 24 of the wiring substrate 22 and one portion of the conductor patterns 23 and 23 is exposed in the peripheral portion of the wiring substrate 22.
- two rectangular portions exposed in the vicinity of the window hole 24 of the wiring substrate 22 constitute a terminal portion 23 a to which the bonding wire 14 is connected.
- the circular part exposed in the part constitutes the external connection electrode part 23b.
- the conductor patterns 23 and 23 of the wiring board 22 are constituted by a laminated film of a Cu film, a Ni film, and an Au film. Further, of the two external connection electrode portions 23b, the external connection electrode portion 23b (the right external connection electrode portion 23b in FIG.
- the LED chip 10 is mounted on the heat transfer plate 21 via the above-described submount member 30 that relieves stress acting on the LED chip 10 due to a difference in linear expansion coefficient between the LED chip 10 and the heat transfer plate 21.
- the submount member 30 is formed in a rectangular plate shape having a planar size larger than the chip size of the LED chip 10.
- the submount member 30 has not only a function of relieving the stress but also a heat conduction function of transferring heat generated in the LED chip 10 to a range wider than the chip size of the LED chip 10 in the heat transfer plate 21. Yes. Therefore, the light emitting device 1 can efficiently dissipate the heat generated in the LED chip 10 through the submount member 30 and the heat transfer plate 21. Further, the light emitting device 1 can reduce the thermal resistance from the LED chip 10 to the heat dissipation block 150 as compared with the case where the LED chip 10 is mounted on the wiring board 22. Further, the light emitting device 1 includes the submount member 30, so that the stress acting on the LED chip 10 due to the difference in linear expansion coefficient between the LED chip 10 and the heat transfer plate 21 can be reduced.
- the cathode electrode is provided on the surface of the submount member 30 on the LED chip 10 side, and is connected to the cathode electrode (not shown) and a metal wire (for example, a gold wire).
- a metal wire for example, a gold wire.
- An aluminum fine wire is electrically connected to one conductor pattern 23 via a bonding wire 14, and the anode electrode is electrically connected to the other conductor pattern 23 via a bonding wire 14.
- the LED chip 10 and the submount member 30 may be bonded using, for example, solder such as SnPb, AuSn, SnAgCu, or silver paste, but may be bonded using lead-free solder such as AuSn, SnAgCu. It is preferable.
- solder such as SnPb, AuSn, SnAgCu, or silver paste
- lead-free solder such as AuSn, SnAgCu. It is preferable.
- the submount member 30 is AlN and is bonded using AuSn
- a pretreatment for forming a metal layer made of Au or Ag in advance on the bonding surface of the submount member 30 and the LED chip is necessary.
- the submount member 30 and the heat transfer plate 21 are preferably joined using lead-free solder such as AuSn or SnAgCu, for example.
- the pre-process which forms the metal layer which consists of Au or Ag previously on the joining surface in the heat exchanger plate 21 is required.
- the material of the submount member 30 is not limited to AlN, and may be any material that has a linear expansion coefficient that is relatively close to 6H—SiC that is a material for a crystal growth substrate and a relatively high thermal conductivity. Si, CuW or the like may be employed.
- the submount member 30 has the above-described heat conduction function, and the area of the surface of the heat transfer plate 21 on the LED chip 10 side is sufficiently larger than the area of the surface of the LED chip 10 on the heat transfer plate 21 side. Larger is desirable.
- the thickness dimension of the submount member 30 is set so that the surface of the submount member 30 is farther from the heat transfer plate 21 than the surface of the protective layer 26 of the wiring board 22. is there. Therefore, it is possible to prevent the light emitted from the LED chip 10 from being sideways absorbed by the wiring board 22 through the inner peripheral surface of the window hole 24 of the wiring board 22.
- the light emitted from the LED chip 10 is reflected around the portion where the LED chip 10 is bonded on the surface of the submount member 30 where the LED chip 10 is bonded (that is, the portion overlapping the LED chip 10).
- a reflective film is formed.
- the reflective film in the submount member 30 may be formed of, for example, a laminated film of a Ni film and an Ag film, but the material of the reflective film is not particularly limited.
- the emission wavelength of the LED chip 10 It may be appropriately selected depending on the situation.
- sealing resin that is the sealing material of the sealing portion 50 described above, a silicone resin is used, but it is not limited to the silicone resin, and for example, an acrylic resin may be used. Further, glass may be used as the sealing material.
- the optical member 60 is a molded product of a translucent material (for example, silicone resin, glass, etc.) and is formed in a dome shape.
- a translucent material for example, silicone resin, glass, etc.
- the optical member 60 is formed of a silicone resin molded product, the difference in refractive index and the linear expansion coefficient between the optical member 60 and the sealing portion 50 can be reduced.
- the material of the sealing part 50 is an acrylic resin, it is preferable to form the optical member 60 also with an acrylic resin.
- the optical member 60 has a light emitting surface 60b formed in a convex curved surface shape that does not totally reflect the light incident from the light incident surface 60a at the boundary between the light emitting surface 60b and the air layer 80 described above. 10 and the optical axis coincide with each other. Therefore, the light emitted from the LED chip 10 and incident on the light incident surface 60a of the optical member 60 can easily reach the color conversion member 70 without being totally reflected at the boundary between the light emitting surface 60b and the air layer 80, The total luminous flux can be increased.
- the light emitted from the side surface of the LED chip 10 propagates through the sealing portion 50, the optical member 60, and the air layer 80 to reach the color conversion member 70 and excites the phosphor of the color conversion member 70, or the phosphor. Or is transmitted through the color conversion member 70 without colliding with the phosphor.
- the optical member 60 is formed to have a uniform thickness along the normal direction regardless of the position.
- the color conversion member 70 is formed of a mixture obtained by mixing a translucent material such as a silicone resin and yellow phosphor particles that are excited by blue light emitted from the LED chip 10 and emit broad yellow light. It is composed of goods. Therefore, in the light emitting device 1, the blue light emitted from the LED chip 10 and the light emitted from the yellow phosphor are emitted through the outer surface 70 b of the color conversion member 70, and white light can be obtained.
- the translucent material used as the material of the color conversion member 70 is not limited to a silicone resin, but an organic / inorganic hybrid in which, for example, an acrylic resin, glass, an organic component and an inorganic component are mixed and combined at the nm level or the molecular level. Materials etc. may be adopted.
- the phosphor particles to be mixed with the translucent material used as the material of the color conversion member 70 are not limited to yellow phosphors.
- white light can be obtained by mixing red phosphors and green phosphors.
- the color rendering can be improved when the red phosphor and the green phosphor are mixed.
- the color conversion member 70 has an inner surface 70 a formed along the light emitting surface 60 b of the optical member 60. Therefore, the distance between the light emitting surface 60b and the inner surface 70a of the color conversion member 70 in the normal direction is a substantially constant value regardless of the position of the light emitting surface 60b of the optical member 60.
- the color conversion member 70 is shape
- the color conversion member 70 may be fixed to the mounting substrate 20 with an end edge (periphery of the opening) on the mounting substrate 20 side using, for example, an adhesive (for example, silicone resin, epoxy resin).
- the optical member 60 is disposed at a predetermined position on the mounting substrate 20 and the sealing resin 50 is cured to form the sealing portion 50.
- the optical member 60 is fixed to the mounting substrate 20, and then color conversion is performed.
- the member 70 is fixed to the mounting substrate 20.
- bubbles voids may be generated in the sealing portion 50 during the manufacturing process, so it is necessary to inject a large amount of liquid sealing resin into the optical member 60.
- the light emitting device 1 overflows from the space surrounded by the optical member 60 and the mounting substrate 20 when the optical member 60 is fixed to the mounting substrate 20 outside the optical member 60 on the one surface of the mounting substrate 20.
- An annular dam portion 27 that dams up the sealing resin is provided. Note that the sealing resin accumulated in the space surrounded by the optical member 60, the dam portion 27, and the protective layer 26 on the one surface side of the mounting substrate 20 is cured to form the resin portion 50b in FIG. Become.
- the dam portion 27 is formed of a white resist. Therefore, the light emitted from the LED chip 10 and the light emitted from the phosphor can be prevented from being absorbed by the weir portion 27, and the light output can be increased.
- the dam portion 27 extends inward from the inner peripheral surface of the dam portion 27 to center the center of the dam portion 27 and the central axis of the optical member 60 (four in this embodiment).
- the claw portions 27b are spaced apart in the circumferential direction and provided at equal intervals.
- the dam portion 27 also serves as a positioning portion for the color conversion member 70.
- the number of the above-mentioned centering claw portions 27b is not limited to four, but it is desirable to provide at least three.
- the width dimension of the centering claw portion 27 b is small in order to increase the allowable amount of sealing resin that can be accumulated between the dam portion 27 and the optical member 60.
- an annular groove for positioning the color conversion member 70 may be provided on the mounting substrate 20 without providing the dam portion 27.
- the color conversion member 70 is formed with a notch 71 that engages with the weir 27 on the entire edge of the mounting substrate 20 side. Therefore, in the light emitting device 1 of the present embodiment, the positioning accuracy of the color conversion member 70 with respect to the mounting substrate 20 can be increased, and the interval between the color conversion member 70 and the optical member 60 can be shortened.
- the notch 71 is open on the edge side and the inner surface 70a side of the color conversion member 70.
- portions of the conductor patterns 23 and 23 on the mounting substrate 20 exposed outside the color conversion member 70 constitute the above-described external connection electrode portions 23b and 23b.
- a circuit pattern 3b (see FIGS. 2 to 4) that defines the connection relationship of each light emitting device 1 is formed on one surface side opposite to the heat dissipation block 150 side.
- a circuit board 3 is provided.
- a plurality of window holes 3c through which each light emitting device 1 is inserted are provided in the circuit board 3 in the thickness direction.
- the LED module 2a includes a base substrate 4 made of a strip-shaped metal plate on which a plurality of light emitting devices 1 and a circuit board 3 are arranged on one surface side in the thickness direction.
- the opening size of each window hole 3 c is set to be slightly larger than the planar size of the mounting substrate 20 in the light emitting device 1.
- Al is employ
- the LED module 2a is detachably attached to the heat dissipation block 150 using attachment screws 8 made of metal screws.
- a screw insertion hole 3 e having an inner diameter larger than the outer diameter of the head 8 a of the mounting screw 8 is formed in the circuit board 3, and the inner diameter is larger than the outer diameter in the base board 4.
- a small screw insertion hole 4e is formed.
- the heat radiating block 150 is formed with a screw hole 15e into which the tip of the mounting screw 8 inserted through the screw insertion holes 3e and 4e is screwed.
- the head 8a of the mounting screw 8 and the inner peripheral surface of the screw insertion hole 3e of the circuit board 3 are separated from each other, and the creeping distance between the mounting screw 8 and the circuit pattern 3b of the circuit board 3 is increased.
- the stress generated in the light emitting device 1 due to the mounting screw 8 can be reduced.
- the circuit board 3 is attached to the base board 4 using assembly screws 7 made of resin screws (see FIGS. 2 and 4), and each light emitting device 1 is made of a filler such as silica or alumina.
- an adhesive layer 92 made of a resin sheet for example, an organic green sheet such as an epoxy resin sheet highly filled with fused silica
- the organic green sheet has electrical insulating properties, high thermal conductivity, high fluidity during heating, and high adhesion to uneven surfaces.
- the heat capacity of the base substrate 4 is large, if the heating temperature of the organic green sheet is increased to about 170 ° C. and cured, the fixing performance between the light emitting device 1 and the base substrate 4 decreases, and the heating temperature is increased to about 150 ° C.
- an insulating layer 91 made of an organic green sheet cured at 170 ° C. in advance on the one surface of the base substrate 4 is provided separately from the adhesive layer 92.
- the adhesive layer 92 and the insulating layer 91 are interposed between the heat transfer plate 21 and the base substrate 4 of the light emitting device 1.
- the adhesive layer 92 secures the fixing performance and the thermal conductivity, and the insulating layer. 91 ensures electrical insulation and thermal conductivity.
- the circuit board 3 and the base board 4 in the LED module 2a are formed in the same outer peripheral shape. That is, the outer peripheral shape of the circuit board 3 and the base board 4 is an elongated rectangular shape.
- the LED module 2a has a dimension in which the outer dimension of the LED unit 2 in the longitudinal direction is slightly smaller than a dimension that is an integral fraction of the dimension in the longitudinal direction of the embedded portion 15 (a quarter in the illustrated example).
- the dimension in the short direction is slightly smaller than the dimension in the short side direction of the embedded portion 15.
- the LED module 2a can be shared by a plurality of types of LED units 2 having different lengths in the longitudinal direction, and the cost can be reduced.
- a mirror 3d (see FIGS. 2 and 4) for reflecting light from the light emitting device 1 is formed on the one surface side of the circuit board 3 described above.
- the mirror 3d is formed of a white resist layer, and most of the circuit pattern 3d is covered with the mirror 3d.
- the circuit board 3 has the circuit pattern 3b described above formed on one surface side of the organic insulating substrate.
- the material of the organic insulating substrate of the circuit board 3 may be a glass epoxy resin such as FR4, but is not limited to the glass epoxy resin, and may be, for example, a polyimide resin or a phenol resin. .
- a surface mount type Zener diode 331 and a surface mount type ceramic capacitor 332 for preventing overvoltage are provided on the circuit board 3 in each window. It is mounted in the vicinity of the hole 3c.
- each external connection electrode portion 23 b is electrically connected to the circuit pattern 3 b of the circuit board 3 through the terminal plate 6.
- a jumper pin may be used as the terminal board 6, a jumper pin may be used.
- each LED module 2a is provided with a male connector 5a (see FIGS. 2 and 4) at one end in the longitudinal direction of the circuit board 3, and a female connector 5b (see FIG. 2) at the other end. Is provided.
- the circuit board 3 is provided between one contact 5a1 of the male connector 5a and one contact (not shown) to which the one contact 5a1 is electrically connected in the female connector 5b. Between the other contact 5a2 of the male connector 5a and the other contact (not shown) to which the other contact 5a2 is electrically connected in the female connector 5b.
- a circuit pattern 3b is formed so as to be short-circuited for the feed wiring. Therefore, a female connector 5c (see FIG. 4) having the same structure as the female connector 5b provided on the circuit board 3 is connected to the pair of electric wires 330 from the lighting device 120, and the female connector 5c is illustrated in FIG. Connected to the male connector 5a (see FIG. 4) of the leftmost LED module 2a in 1 (a), and provided with a connector (not shown) for short-circuiting the contacts of the female connector 5b of the rightmost LED module 2a Thus, power can be supplied from the lighting device 120 to the series circuits of all the LED chips 10 of the LED unit 2.
- the lighting fixture of this embodiment is embedded in the planar part of the surface which takes out light from the light-emitting device 1 in the LED unit 2, and the reflective surface 110a of the reflecting plate 110, as shown in FIG.1 (b).
- the peripheral part of the part 115 is flush with each other.
- the surface that comes into contact with the surrounding medium (air) of the light emitting device 1 and the light is finally emitted, and the light that comes into contact with the surrounding medium (air) of the light emitting device 1
- Both the finally reflected surface constitutes a surface for extracting light from the light emitting device 1
- the surface of the protective layer 26 of the light emitting device 1 constitutes the planar portion of the LED unit 2.
- the reflective plate 110 is disposed on the heat dissipation block 150 side from the peripheral portion of the embedded portion 115.
- a height adjustment piece 116 is extended, and a contact piece 117 in surface contact with the heat dissipation block 150 is extended outward from the tip of the height adjustment piece 116.
- the surface of the mirror 3d of the circuit board 3 is flush with the planar portion.
- a wire introduction hole 110 b for passing the above-described pair of wires 330 is formed in the height adjustment piece 116 in the reflector 110.
- the electric wire introduction hole 110b is opened in a circular shape having an inner diameter through which the male connector 330 can be inserted.
- the reflector 110 has an embedded portion 115 that is opened in a shape corresponding to the outer peripheral shape of the LED unit 2 and in which the LED unit 2 is embedded, and the heat dissipation block 150 includes the reflector. 110, the size of the heat dissipation block 150 can be increased, and the heat generated in the light emitting device 1 is efficiently dissipated through the heat dissipation block 150, thereby suppressing the temperature rise of the LED chip 1. It is possible to increase the optical output.
- the periphery of the light emitting device 1 It becomes possible to suppress that a part becomes dark.
- the surface of the mirror 3d formed on the circuit board 3 is flush with the planar portion, it is possible to suppress the peripheral portion of the light emitting device 1 from being darkened due to the circuit board 3. It becomes.
- each light emitting device 1 is mounted on a separate circuit board that defines the connection relationship of each light emitting device 1 in the LED unit 2, the thermal resistance from each light emitting device 1 to the heat dissipation block 150 can be reduced, The heat dissipation can be improved.
- the air layer 80 is interposed between the dome-shaped color conversion member 70 and the optical member 60 as described above.
- the light is scattered toward the optical member 60 side to be optical.
- the amount of light transmitted through the member can be reduced, and the light extraction efficiency to the outside as the light emitting device 1 can be improved.
- the reflecting surface 110a of the reflecting plate 110 can be illuminated by light scattered by the phosphor particles to the reflecting surface 110a side of the reflecting plate 110 and light emitted from the phosphor to the reflecting surface 110a side.
- the thermal resistance is reduced as compared with the case where a part of the reflector 110 is interposed between the LED unit 2 and the heat dissipation block 150. It is possible to improve heat dissipation.
- the plane size of the heat dissipation block 150 is set larger than the plane size of the LED unit 2, the heat transferred to the heat dissipation block 150 can be transferred to a wider range, and heat dissipation is improved.
- the heat transferred from each light emitting device 1 can be transferred to a wider range. .
- the contact piece 117 that is in surface contact with the heat dissipation block 150 from the embedded portion 115 in the reflection plate 110 is provided, part of the heat transferred from the LED unit 2 to the heat dissipation block 150 is also efficiently transmitted from the reflection plate 110. It is possible to dissipate heat well.
- the heat radiating block 150 can be made small, and weight reduction and cost reduction can be achieved.
- Al is adopted as the material of the reflecting plate 110, the thermal conductivity is higher than when a steel plate is used, and the heat generated in the LED unit 2 can be radiated more efficiently.
- the LED unit 2 can be attached to and detached from the heat dissipation block 150 without removing the reflector 110 from the instrument body 100 in a state where the reflector 110 is attached to the instrument body 100, the replacement work of the LED unit 2 is facilitated. Moreover, when the thing which is not lighted before the lifetime among several light-emitting devices 1 generate
- the lighting fixture of this embodiment is provided with the translucent cover 180 which covers the LED unit 2 and the peripheral part of the embedding part 115 in the reflecting plate 110
- the translucent cover 180 is the reflecting plate 110. Removably attached to. Therefore, the LED unit 2 can be protected by attaching the translucent cover 180, and the translucent cover 180 may be removed from the reflector 110 when the LED unit 2 or the LED module 2a is replaced.
- the translucent cover 180 is configured to have a diffusing function for diffusing light from the LED unit 2, the reflecting surface 110a of the reflecting plate 110 can be illuminated more uniformly.
- the light diffusing material may be dispersed in the base material of the translucent cover 180.
- the above-described LED unit 2 does not necessarily need to be configured by a plurality of LED modules 2a, and may of course not include one base substrate 4 and one circuit substrate 3.
- the circuit pattern 3b may be formed so that the series circuits of all the LED chips 10 are inserted between the contacts 5a1 and 5a2 of the male connector 5a.
- the plurality of light emitting devices 1 are connected in series.
- the connection relationship between the plurality of light emitting devices 1 is not particularly limited.
- the light emitting devices 1 may be connected in parallel or connected in series. And parallel connection may be combined.
- the means for detachably attaching the LED unit 2 to the heat radiating block 150 is not limited to the example using the mounting screw 8 (see FIG. 1B) as described above, and for example, as shown in FIG. Alternatively, a leaf spring 118 formed by bending a strip-shaped metal plate may be used.
- the dimension of the base substrate 4 is set longer than the dimension of the circuit board 3 with respect to the dimension of the LED unit 2 in the short direction.
- the upper part of the height adjustment piece 116 has a cross-section L so that the distance between the upper parts on the heat radiation block 150 side of the height adjustment pieces 116 facing each other in the short direction of the LED unit 2 is longer than the distance between the lower parts.
- the width dimension of the portion of the LED unit 2 in which the base substrate 4 is accommodated is made longer than the dimension in the short direction of the base substrate 4, and the width dimension of the portion in which the circuit board 3 is accommodated is shorter than that of the circuit board 3. It is longer than the dimension in the direction and shorter than the dimension in the short direction of the base substrate 4. Therefore, the LED unit 2 is held by the heat dissipation block 150 and the reflection plate 110.
- the other height adjustment piece 116 (the height adjustment on the right side in the figure) in the upper part of the one height adjustment piece 116 (the height adjustment piece 116 on the left side in the figure).
- a fixed piece 118a composed of a central portion in the length direction of the metal plate constituting the plate spring 118 is fixed to the surface facing the upper portion of the piece 116) by spot welding or the like.
- the leaf spring 118 includes contact pieces 118b disposed at both ends in the length direction so as to be spaced apart from the height adjustment pieces 116 and contacting the side surfaces of the base substrate 4 in the short direction, and the fixed pieces 118a and the contact pieces.
- thermo conductive sheet thermal conductive sheet
- the base substrate 4 is placed in the embedded portion 115 in a state where the LED unit 2 is inclined from the horizontal plane.
- the LED unit 2 is inserted after the side surface of the base substrate 4 is brought into contact with the contact piece 118b of the leaf spring 118 of one height adjusting piece 116 and the leaf spring 118 is elastically deformed against the spring force of the leaf spring 118. Then, the other side surface of the base plate 4 may be brought into contact with the other height adjustment piece 116 by the restoring force of the leaf spring 118.
- the LED unit 2 when removing the LED unit 2, the LED unit 2 may be inclined and removed after the LED unit 2 is pushed toward the leaf spring 118 side. If a jig insertion part (hole or notch) into which the tip of a flathead screwdriver or the like can be inserted at the time of removal is provided on the circuit board 3 and the base board 4, the LED unit 2 can be easily pressed against the leaf spring 118 side. The force applied to the circuit board 3 can be reduced.
- a pair of leaf springs 119 as shown in FIG. 9A may be used. Also in the example shown in FIG. 9A, the dimension of the base substrate 4 is set longer than the dimension of the circuit board 3 with respect to the dimension of the LED unit 2 in the short direction.
- the leaf spring 119 is formed by bending a strip-shaped metal plate.
- the leaf spring 119 is fixed to the upper portion of the height adjustment piece 116 by spot welding or the like, and the periphery of the base substrate 4 of the LED unit 2.
- a J-shaped contact piece 119b that elastically contacts the portion, and the fixed piece 119a and the contact piece 119b are connected to each other by an inverted V-shaped connection piece 119c.
- the height adjustment piece 116 of the reflecting plate 110 corresponds to the leaf spring 119 in order to reduce the gap formed between the reflecting surface 110a of the reflecting plate 110 and the planar portion of the LED unit 2. Only the portion to be recessed is recessed in a U shape in plan view. In the example shown in FIG.
- the means for attaching the LED unit 2 to the heat dissipation block 150 is not limited to the above examples.
- a screw insertion hole 150 e through which the attachment screw 8 is inserted may be provided in the heat radiating block 150, and a screw hole 21 e into which the tip of the attachment screw 8 is screwed may be provided in the heat transfer plate 21.
- the contact piece 117 in the reflection plate 110 is connected to the height adjustment piece 116 by the contact piece 117 in contact with the heat dissipation block 115 in the reflection plate 110.
- the LED unit 2 may be attached to the heat dissipation block 150 so that the other surface of the LED unit 2 is in close contact with the heat dissipation block 150.
- the contact piece 117 is provided with a screw insertion hole 117 e through which the mounting screw 8 is inserted.
- the reflector 110 when the reflector 110 is not used as a heat radiating member, as shown in FIG. 12, a structure that does not include the contact piece 117 described above may be employed. Further, in the case where white light can be emitted by the LED chip 10 alone, or when the phosphor is dispersed in the sealing portion 50, as shown in FIG. 13, a structure without the color conversion member 70 described above is provided. Can be adopted.
- the heat transfer plate 21 and the heat dissipation block 150 of the light emitting device 1 are joined by the insulating layer 95 made of the organic green sheet. Are electrically isolated and thermally coupled.
- a blue LED chip whose emission color is blue is used as the LED chip 10 and a SiC substrate is used as the crystal growth substrate.
- a GaN substrate or a sapphire substrate is used instead of the SiC substrate.
- the crystal growth substrate has a higher thermal conductivity than the case where a sapphire substrate, which is an insulator, is used as the crystal growth substrate. The thermal resistance of the substrate can be reduced.
- the LED chip 10 has the anode electrode formed on the one surface side and the cathode electrode formed on the other surface side. The anode electrode and the cathode electrode are formed on the one surface side.
- both the anode electrode and the cathode electrode can be directly connected to the conductor patterns 23 and 23 via the bonding wires 14.
- emitted from LED chip 10 is not restricted to blue light, For example, purple light, ultraviolet light, etc. may be sufficient.
- the submount member 30 is not necessarily provided.
- the LED chip 10 having a chip size of 1 mm ⁇ is used and one LED chip 10 is disposed on the submount member 30.
- the chip size and number of the LED chips 10 are particularly limited.
- a plurality of LED chips 10 are arranged on one submount member 30 by adopting an LED chip 10 having a chip size of 0.3 mm ⁇ .
- the LED chip 10 may be connected in series via the electrode pattern of the submount member 30 and a bonding wire (not shown).
- the configuration of the LED unit 2 is not limited to the above-described examples. For example, as shown in FIG. But you can.
- the circuit board 3 is attached to the heat dissipation block 150 using the attachment screws 8.
- the circuit board 3 is provided with a screw insertion hole 3f through which the attachment screw 8 is inserted, and the heat dissipation block 150 is provided with a screw hole 115e into which the tip of the attachment screw 8 is screwed.
- a rubber sheet-like heat dissipation sheet (thermal conductive sheet) 93 such as Sarcon (registered trademark) is connected to the LED unit 2. It is sandwiched between the heat dissipation block 150.
- the LED unit 2 and the heat dissipation block 150 are thermally coupled via the heat dissipation sheet 93.
- the light-emitting device 1 in FIG. 14 includes an LED chip 10, a mounting substrate 20 d on which the LED chip 10 is mounted, a hemispherical optical member 65 disposed so as to overlap the LED chip 10, and a color conversion member 70.
- the optical member 65 is formed of silicone resin, the material of the optical member 65 is not limited to silicone resin, and may be glass, for example.
- the optical member 65 reduces the refractive index difference between the LED chip 10 and the medium with which the light extraction surface of the LED chip 10 is in contact as compared with the case where the medium is air, thereby improving the light extraction efficiency from the LED chip 10. It is to improve.
- the mounting substrate 20d is provided with a housing recess 20ad for housing the LED chip 10 on one surface, and an anode electrode (not shown) and a cathode electrode (not shown) of the LED chip 10 are electrically connected via bumps. It is constituted by a ceramic substrate on which wiring (not shown) to be formed is formed.
- the LED chip 10 is flip-chip mounted on the mounting substrate 20d, and light is extracted through a sapphire substrate that is a crystal growth substrate.
- the housing recess 20ad in the mounting substrate 20d is opened in a circular shape, and the opening area gradually increases as the distance from the inner bottom surface increases.
- a sealing portion 55 made of a sealing material (for example, silicone resin) that seals the LED chip 10 is provided in the housing recess 20ad of the mounting substrate 20d, and the optical member 65 is sealed with the above-described sealing. The material is bonded to the mounting substrate 20d.
- a sealing material for example, silicone resin
- the color conversion member 70 is formed in a sheet shape and is hermetically sealed to the mounting substrate 20 d so as to cover the optical member 65.
- the mounting substrate 20 d and the color conversion member 70 form a package, and the light emitting surface 70 b of the color conversion member 70 is a plane of the surfaces from which light is extracted from the light emitting device 1 in the LED unit 2.
- the part of a shape is comprised.
- the lighting fixture has the LED unit 2, the fixture body 100, the reflector 110, the lighting device 120, and the heat dissipation block 150.
- the LED unit 2 is formed in a long shape.
- the LED unit 2 includes a plurality of light emitting devices 1 on one surface side in the thickness direction. In other words, the LED unit 2 includes a plurality of light emitting devices 1 on the first surface in the thickness direction.
- Each light emitting device 1 has an LED chip 10.
- the reflector 110 is made of metal.
- the reflector 110 is held by the instrument body 100.
- the reflector 110 is configured to control the light from the LED unit 2 so as to achieve a target light distribution.
- the lighting device 120 is attached to the instrument main body 100 in a replaceable manner.
- the lighting device 120 is configured to light the LED unit 2.
- the heat dissipation block 150 is disposed on the other side of the LED unit 2 in the thickness direction. In other words, the heat dissipation block 150 is disposed on the second surface in the thickness direction of the LED unit 2. The second surface is on the opposite side of the first surface.
- the heat dissipating block 150 is attached so that the LED unit 2 can be replaced.
- the heat dissipation block 150 is configured to dissipate heat generated by the LED unit 2.
- the reflection plate 110 has an embedded portion 115.
- the embedding part 115 is provided for embedding the LED unit 2.
- the heat dissipation block 150 is held by the reflector 110.
- the LED unit 2 has a surface for extracting light from the light emitting device 1.
- the surface from which light is extracted has a planar portion.
- the peripheral part of the embedding part 115 in the reflective surface 110a is flush with the planar part.
- the reflective surface 110a has a reflective portion.
- the reflective portion is located on the peripheral portion of the embedded portion 115. In other words, the reflective portion is located outside the outer periphery of the embedded portion 115.
- the planar portion is flush with the reflective portion.
- the reflection plate 110 has an embedded portion 115 that is opened in a shape corresponding to the outer peripheral shape of the LED unit 2 and in which the LED unit 2 is embedded. Further, the heat dissipation block 150 is held by the reflection plate 110. Therefore, the size of the heat dissipation block 150 can be increased. Therefore, the heat generated in the light emitting device 1 is efficiently radiated through the heat radiating block 150. That is, the temperature rise of the LED chip 10 can be suppressed and the light output can be increased. Further, the planar portion of the surface from which the light is extracted from the light emitting device 1 in the LED unit 2 and the peripheral portion of the embedding portion 115 in the reflecting surface 110a of the reflecting plate 110 are flush with each other. Therefore, it becomes possible to suppress that the peripheral part of the light-emitting device 1 becomes dark.
- the reflector 110 has the embedded portion 115 that is opened in a shape corresponding to the outer peripheral shape of the LED unit 2 and in which the LED unit 2 is embedded.
- the embedding part 115 has a predetermined shape.
- the predetermined shape is formed so that the LED unit 2 is disposed inside the embedded portion 115.
- the opening is provided so as to penetrate in the thickness direction of the reflecting plate 110.
- the LED unit 2 is detachably attached to the heat dissipation block 150 in a state where the reflector 110 is attached to the instrument main body 100.
- the other surface (second surface) is in surface contact with the heat dissipation block 150. Therefore, the heat dissipation of the LED unit 2 can be improved.
- the lighting fixture has a bowl-like shape that is detachably attached to the reflecting plate 110 so as to cover the LED unit 2 and the peripheral portion of the embedded portion 115 in the reflecting plate 110.
- the translucent cover 180 is provided.
- the reflective portion is defined by a portion covered with the translucent cover 180.
- the reflector 110 has a first height.
- the first height is along the thickness direction of the LED unit 2.
- the first height of the reflecting plate 110 is such that the planar portion of the surface from which the LED unit 2 extracts light from the light emitting device 1 and the peripheral portion of the embedding portion 115 on the reflecting surface 110 a of the reflecting plate 110. It is set to be flush.
- the reflector 110 has a height adjusting piece 116.
- the height adjustment piece 116 extends from the reflector 110 toward the heat dissipation block 150. Thereby, the height adjusting piece 116 extends from the reflector 110 along the thickness direction of the LED unit 2.
- the height adjustment piece 116 has a first height in the thickness direction of the LED unit 2. Thereby, the height of the reflecting plate 110 is determined by the height adjusting piece 116.
- the first height of the height adjustment piece 116 is a flat portion of the surface from which light is extracted from the light emitting device 1 in the LED unit 2 and the peripheral portion of the embedding portion 115 in the reflecting surface 110a of the reflecting plate 110. Are set to be flush with each other.
- the LED unit 2 has a first thickness in the thickness direction of the LED unit 2.
- the first height is set so that the planar portion of the surface from which light is extracted from the light emitting device 1 and the peripheral portion of the embedding portion 115 in the reflecting surface 110 a of the reflecting plate 110 are flush with each other.
- the first thickness is set.
- the heat dissipation block 150 has a flat surface.
- the heat radiating block 150 has the reflector 110 and the LED unit 2 mounted on a plane.
- the first thickness is set equal to the first height.
- the height adjusting piece 116 further has a contact piece 117.
- the contact piece 117 extends in a direction crossing the thickness direction of the LED unit 2.
- the contact piece 117 is in surface contact with the heat dissipation block 150.
- the height adjustment piece 116 further has a contact piece 117.
- the contact piece 117 extends in a direction orthogonal to the thickness direction of the LED unit 2.
- the contact piece 117 is in surface contact with the heat dissipation block 150.
- part of the heat transferred from the LED unit 2 to the heat dissipation block 150 can be efficiently dissipated from the reflector 110 as well. That is, the reflecting plate 110 can be used as a heat radiating member. Therefore, the heat dissipation block 150 can be reduced. Thereby, weight reduction and cost reduction can be achieved.
- the contact piece 117 extends from the height adjustment piece 116 in a direction opposite to the LED unit 2. .
- the height adjusting piece 116 has a first end on one side in the height direction.
- the contact piece 117 extends from the first end of the height adjustment piece 116 in a direction opposite to the LED unit 2.
- the contact piece 117 When the heat is released from the heat dissipation block 150 to the contact piece 117, the temperature of the contact piece 117 rises. As the temperature of the contact piece 117 rises, the contact piece 117 expands. However, the contact piece 117 extends in the direction opposite to the LED unit 2. Therefore, when the temperature of the contact piece 117 rises, the contact piece 117 expands in the direction opposite to the LED unit 2. In other words, the contact piece 117 does not expand toward the LED unit 2. Thereby, the clearance gap between the reflecting plate 110 and the LED unit 2 can be kept constant. That is, even when the gap between the reflecting plate 110 and the LED is set narrow, the contact piece 117 does not contact the LED unit 2 due to the contact piece 117 expanding. Therefore, even when the gap between the reflecting plate 110 and the LED unit 2 is set narrow, the contact piece 117 does not apply force to the LED unit 2 due to the expansion of the contact piece 117.
- the reflector 110 has a recess.
- the concave portion has a shape corresponding to the outer peripheral shape of the LED unit 2.
- the recess is configured such that the LED unit 2 is embedded.
- a recess defines the embedded portion 115.
- the embedding part 115 has a peripheral wall and a bottom wall.
- the peripheral wall is defined as a height adjustment piece 116.
- the bottom wall is defined as a contact piece 117.
- the LED unit 2 is in contact with the heat dissipation block 150 through the bottom wall.
- the light emitting device 1 includes an LED chip 10, a mounting substrate 20, and an optical element.
- the mounting substrate 20 has the LED chip 10 mounted on one surface side.
- the optical element is fixed to one surface side of the mounting substrate 20 so that the LED chip 10 is accommodated between the optical element and the mounting substrate 20.
- the optical element has a peripheral portion.
- An outer peripheral portion of the optical element is fixed to one surface side of the mounting substrate 20.
- a planar portion of the surface from which the light is extracted is defined by a portion outside the outer peripheral portion.
- the optical element has an optical member 60.
- the optical member 60 is configured to control the light distribution of the light emitted from the LED chip 10.
- the optical member 60 is fixed to one surface of the mounting substrate 20 so as to accommodate the LED chip 10 between the optical member 60 and the mounting substrate 20.
- the optical member 60 has a dome shape.
- the optical element further has a color conversion member 70.
- the color conversion member 70 includes a phosphor and a translucent material. The phosphor is excited by light emitted from the LED chip 10 and emits light of a color different from the emission color of the LED chip 10.
- the color conversion member 70 is disposed in such a manner that an air layer is interposed between the color conversion member 70 and the optical member 60 on the one surface side of the mounting substrate 20.
- the color conversion member 70 has a dome shape.
- the lighting fixture in the previous period has an attaching means.
- the LED unit 2 is attached to the heat dissipation block 150 by the attachment means.
- the attachment means is constituted by a spring.
- the spring is configured to urge the LED unit 2 toward the heat dissipation block 150.
- the spring is composed of a leaf spring 119.
- the leaf spring 119 has a first portion (connecting piece 119c) extending from the periphery toward the inside of the periphery. Accordingly, the LED unit 2 is sandwiched between the first portion of the leaf spring 119 and the heat dissipation block 150.
- the LED unit 2 can be easily attached to the heat dissipation block 150.
- the LED unit 2 can be attached to the heat dissipation block 150 so that the LED unit 2 is in close contact with the heat dissipation block 150.
- the leaf spring 119 further has a second portion (contact piece 119b).
- the second part extends from the first part in a direction opposite to the heat dissipation block 150.
- the second part is located between the LED unit 2 and the reflector 110.
- the LED unit 2 can be easily detached from the heat dissipation block 150.
- the lighting fixture further has attachment means.
- the LED unit 2 is in contact with the reflecting plate 110 by attachment means.
- the embedded portion 115 has a peripheral edge.
- the peripheral edge has a first inner surface and a second inner surface.
- the second inner surface is opposed to the first inner surface.
- the attachment means is disposed on the first inner surface. The LED unit 2 is held by the attachment means and the second inner surface so as to come into contact with the second inner surface of the reflector 110.
- the heat of the LED unit 2 can be released to the heat dissipation block 150 and the reflector 110.
- the attaching means is constituted by a spring 118.
- the spring 118 is configured to urge the LED unit 2 against the second inner surface, whereby the LED unit 2 comes into contact with the second inner surface of the reflector 110.
- peripheral portion of the embedded portion on the reflecting surface of the reflecting plate is defined as a surface parallel to a planar portion of the surface from which light is extracted from the light emitting device in the LED unit.
- peripheral portion of the embedded portion on the reflecting surface of the reflecting plate is defined in a region located inside the translucent cover.
- the lighting fixture of this embodiment is a lighting fixture that is directly attached to the ceiling, and as shown in FIG. A main body 100, reflector adapters 170 provided at both ends of the instrument body 100 in the longitudinal direction, a reflector 110 having a V-shaped cross section attached to the reflector adapter 170 so as to cover the instrument body 100, and a reflector 110 And two LED units 2 held in the box.
- the heat dissipation block 150 described in the first embodiment is provided for each LED unit 2.
- the lighting fixture of the present embodiment is a so-called Fuji-type (mountain-type) lighting fixture, and the shapes of the reflector 110 and the reflector adapter 170 are different from those of the first embodiment.
- symbol is attached
- the main piece 101 of the instrument main body 100 is provided with two bolt insertion holes 101a as in the first embodiment.
- the instrument body is inserted by inserting the mounting bolt 310 protruding from the construction surface into the bolt insertion hole 101a and tightening the nut 108 through the washer 107 to the mounting bolt 310.
- 100 can be coupled to the mounting bolt 310.
- the lighting device 120 in the present embodiment is connected to each LED unit 2 so as to light each LED unit 2.
- the lighting device 120 is provided with two terminal devices 147 (see FIG. 7) described in the first embodiment.
- the reflector adapter 170 is formed by bending a strip-shaped metal plate.
- the reflection plate adapter 170 is attached to the attachment piece 171 facing the main piece 101 of the instrument main body 100 in a state of being attached to the instrument main body 100, and is a latch member that is rotatably attached to the reflection plate 110 at the top of the reflection plate 110.
- a long hole-like locking hole 172 for locking 114 is formed.
- the reflector adapter 170 is attached to the side piece 102 of the instrument main body 100 so that both ends thereof are perpendicular to the longitudinal direction of the main piece 101 of the instrument main body 100.
- the longitudinal direction of the stop hole 172 is made to coincide with the longitudinal direction of the mounting piece 171. Therefore, the reflector 110 can be attached to and detached from the reflector adapter 170 by appropriately rotating the latch member 114.
- the two LED units 2 are arranged so that their longitudinal directions are parallel to each other with the top of the reflector 110 sandwiched therebetween.
- the temperature rise of the LED chip 10 can be suppressed, the light output can be increased, and the peripheral portion of the light emitting device 1 is prevented from being darkened. It becomes possible to do.
- LED units 2 and the shape of the reflector 110 are not limited to the structures of the above embodiments.
Abstract
Description
以下、本実施形態の照明器具について図1~図7を参照しながら説明する。
本実施形態の照明器具は、天井直付けの照明器具であって、図15に示すように、下面側が開放された断面略U字形に形成され天井材300の下面からなる施工面に取り付けられる器具本体100と、器具本体100の長手方向の両端部に設けられた反射板アダプタ170と、器具本体100を覆うように反射板アダプタ170に取り付けられる断面V字状の反射板110と、反射板110に保持される2つのLEDユニット2とを備えている。ここにおいて、実施形態1にて説明した放熱ブロック150は、LEDユニット2ごとに設けられている。本実施形態の照明器具は、いわゆる富士型(山型)の照明器具となっており、実施形態1とは反射板110および反射板アダプタ170の形状が相違している。なお、実施形態1と同様の構成要素には同一の符号を付して説明を省略する。
2 LEDユニット
2a LEDモジュール
3 回路基板
3b 回路パターン
3c 窓孔
3d ミラー
4 ベース基板
10 LEDチップ
20 実装基板
21 伝熱板
22 配線基板
23 導体パターン
24 窓孔
30 サブマウント部材
50 封止部
60 光学部材
70 色変換部材
80 空気層
100 器具本体
110 反射板
110a 反射面
115 埋込部
120 点灯装置
150 放熱ブロック
180 透光性カバー
Claims (30)
- LEDチップを用いた発光装置を厚み方向の一面側に複数備えた長尺のLEDユニットと、器具本体と、器具本体に保持されLEDユニットからの光を目標の配光となるように制御する金属製の反射板と、器具本体に交換可能に取着されLEDユニットを点灯させる点灯装置と、LEDユニットの厚み方向の他面側に配置されてLEDユニットが交換可能に取着されLEDユニットで発生した熱を放熱する放熱ブロックとを備え、反射板が、LEDユニットが埋め込まれる埋込部を有するとともに、放熱ブロックが、反射板に保持され、LEDユニットにおいて発光装置から光を取り出す面のうちの平面状の部位と反射板の反射面における埋込部の周部とを面一としてあることを特徴とする照明器具。
- 前記反射板は、前記LEDユニットの外周形状に応じた形状に開口され前記LEDユニットが埋め込まれる前記埋込部を有していることを特徴とする請求項1に記載の照明器具。
- 前記LEDユニットは、前記反射板が前記器具本体に取り付けられた状態において前記放熱ブロックに対して着脱自在に取り付けられてなり、前記他面が前記放熱ブロックに面接触していることを特徴とする請求項1記載の照明器具。
- 前記放熱ブロックの平面サイズが前記LEDユニットの平面サイズよりも大きいことを特徴とする請求項1から請求項3のいずれかに記載の照明器具。
- 前記LEDユニットと前記反射板における前記埋込部の周部とを覆う形で前記反射板に着脱自在に取り付けられた樋状の透光性カバーを備えることを特徴とする請求項1から請求項4のいずれか1項に記載の照明器具。
- 前記透光性カバーは、前記LEDユニットからの光を拡散させる拡散機能を有することを特徴とする請求項5記載の照明器具。
- 前記LEDユニットは、前記発光装置を同じ数ずつ備えるとともに互いに同じ大きさに形成され前記埋込部の長手方向に並設された複数個のLEDモジュールにより構成されてなることを特徴とする請求項1から請求項5のいずれか1項に記載の照明器具。
- 前記LEDユニットは、前記各発光装置の接続関係を規定する回路パターンが前記放熱ブロック側とは反対の一表面側に形成されるとともに、前記各発光装置それぞれが挿入される複数の窓孔が厚み方向に貫設された回路基板を備え、回路基板は、前記各発光装置からの光を反射するミラーが前記一表面側に形成されてなり、ミラーの表面が前記平面状の部位と面一であることを特徴とする請求項1から請求項6のいずれか1項に記載の照明器具。
- 前記発光装置は、LEDチップと、一表面側にLEDチップへの給電用の導体パターンを有しLEDチップが前記一表面側に実装された実装基板と、LEDチップから放射された光の配光を制御する光学部材であって実装基板との間にLEDチップを収納する形で実装基板の前記一表面側に固着されたドーム状の光学部材と、光学部材と実装基板とで囲まれた空間に充実されLEDチップを封止した透光性の封止材料からなる封止部と、LEDチップから放射され封止部および光学部材を透過した光によって励起されてLEDチップの発光色とは異なる色の光を放射する蛍光体および透光性材料により形成したものであって実装基板の前記一表面側で光学部材との間に空気層が介在する形で配設されたドーム状の色変換部材とを備えることを特徴とする請求項1から請求項8のいずれか1項に記載の照明器具。
- 前記実装基板は、熱伝導性材料からなり前記LEDチップがサブマウント部材を介して実装される伝熱板と、前記導体パターンを有し伝熱板における前記LEDチップの実装面側に固着された配線基板であってサブマウント部材を露出させる窓孔が厚み方向に貫設された配線基板とで構成され、前記サブマウント部材は、前記LEDチップよりも平面サイズが大きく、前記LEDチップに重なる部位の周囲に前記LEDチップからの光を反射する反射膜が形成されてなることを特徴とする請求項9記載の照明器具。
- 前記反射板は、第1の高さを有しており、前記第1の高さは、前記LEDユニットの前記厚み方向に沿っており、
前記反射板の前記第1の高さは、前記LEDユニットにおいて発光装置から光を取り出す面のうちの平面状の部位と反射板の反射面における埋込部の周部とが面一となるように設定されていることを特徴とする請求項1に記載の照明器具。
- 前記反射板は、高さ調整片を有しており、
前記高さ調整片は、前記反射板から前記放熱ブロックに向かって延出しており、
前記高さ調整片は、前記LEDユニットの厚み方向において延出しており、かつ、前記LEDユニットの厚み方向において、前記第1の高さを有しており、これにより、前記反射板の高さは、前記高さ調整片によって決定され、
前記高さ調整片の前記第1の高さは、前記LEDユニットにおいて発光装置から光を取り出す面のうちの平面状の部位と反射板の反射面における埋込部の周部とが面一となるように設定されていることを特徴とする請求項1に記載の照明器具。
- 前記LEDユニットは、前記LEDユニットの厚み方向において第1の厚みを有しており、
前記LEDユニットにおいて発光装置から光を取り出す面のうちの平面状の部位と反射板の反射面における埋込部の周部とが面一となるように、前記第1の高さ及び前記第1の厚みが設定されていることを特徴とする請求項12に記載の照明器具。
- 前記放熱ブロックは、平面を有しており、前記平面上に前記反射板及び前記LEDユニットが取り付けられており、
前記第1の厚みは、前記第1の高さと等しく設定されていることを特徴とする請求項13に記載の照明器具。
- 前記高さ調整片は、さらに接触片を有しており、
前記接触片は、LEDユニットの厚み方向と交差する方向において延出しており、
前記接触片は、前記放熱ブロックと面接触していることを特徴とする請求項13に記載の照明器具。
- 前記高さ調整片は、さらに接触片を有しており、
前記接触片は、LEDユニットの厚み方向と直交する方向において延出しており、
前記接触片は、前記放熱ブロックと面接触していることを特徴とする請求項14に記載の照明器具。
- 前記接触片は、前記高さ調整片から、前記LEDユニットと反対の方向に向かって延出していることを特徴とする請求項15または請求項16のいずれかに記載の照明器具。
- 前記高さ調整片は、その高さ方向の一方に第1端を有しており、
前記接触片は、前記高さ調整片の前記第1端から、前記LEDユニットと反対の方向に向かって延出していることを特徴とする請求項17に記載の照明器具。
- 前記反射板は、前記LEDユニットの外周形状に応じた形状を有しており、且つ、LEDユニットが埋め込まれるように構成されている凹部を有しており、前記凹部が前記埋込部を定義することを特徴とする請求項15に記載の照明器具。
- 前記埋込部は、周壁と底壁とを有しており、
前記周壁は、高さ調整片として定義され、
前記底壁は、接触片として定義され、
前記LEDユニットは、前記底壁を介して前記放熱ブロックと接触していることを特徴とする請求項19に記載の照明器具。
- 前記発光装置は、LEDチップと、LEDチップが一表面側に実装された実装基板と、前記実装基板との間にLEDチップを収納する形で実装基板の前記一表面側に固着された光学要素と、を有しており、
前記光学要素は、外周部分を有しており、
前記光学要素の前記外周部分は、前記実装基板の前記一表面側に固着されており、
前記光を取り出す面のうちの前記平面状の部位は、前記外周部分よりも外側の部分で定義されることを特徴とする請求項1に記載の照明器具。
- 前記光学要素は、光学部材を有しており、
前記光学部材は、LEDチップから放射された光の配光を制御するように構成されており、実装基板との間にLEDチップを収納する形で前記実装基板の一表面に固着されており、ドーム状であることを特徴とする請求項21に記載の照明器具。
- 前記光学要素は、さらに、色変換部材を有しており、
前記色変換部材は、蛍光体と透光性材料とを含んでおり、前記蛍光体は、前記LEDチップから放射された光によって励起されて前記LEDチップの発光色とは異なる色の光を放射し、
前記色変換部材は、前記実装基板の前記一表面側で光学部材との間に空気層が介在する形で配設されており、且つ、ドーム状であることを特徴とする請求項22に記載の照明器具。
- 前記照明器具は、さらに取り付け手段を有しており、
前記LEDユニットは、前記取り付け手段によって、前記放熱ブロックに対して取り付けられていることを特徴とする請求項1に記載の照明器具。
- 前記取り付け手段は、ばねで構成されており、
前記ばねは、前記LEDユニットを前記放熱ブロックに向かって付勢するように構成されていることを特徴とする請求項24に記載の照明器具。
- 前記ばねは、板ばねで構成されており、
前記板ばねは、前記周縁から前記周縁の内側に向かって延出している第1部分を有しており、これにより前記LEDユニットは、前記板ばねの前記第1部分と前記放熱ブロックとの間で挟持されることを特徴とする請求項25に記載の照明器具。
- 前記板ばねは、さらに第2部分を有しており、
前記第2部分は、前記第1部分から、前記放熱ブロックと反対の方向に向かって延出しており、
前記第2部分は、前記LEDユニットと前記反射板との間に位置することを特徴とする請求項26に記載の照明器具。
- 前記照明器具は、さらに取り付け手段を有しており、
前記LEDユニットは、取り付け手段によって、前記反射板に対して接触されていることを特徴とする請求項1に記載の照明器具。
- 前記埋込部は、周縁を有しており、
前記周縁は、第1の内面と第2の内面とを有しており、
前記第2の内面は、前記第1の内面と対向しており、
前記取り付け手段は、前記第1の内面に配置されており、
前記LEDユニットが前記反射板の第2の内面と接触するように、前記取り付け手段と前記第2の内面とにより保持されていることを特徴とする請求項28に記載の照明器具。
- 前記取り付け手段は、ばねで構成されており、
前記ばねは、前記LEDユニットを前記第2の内面に対して付勢するように構成されており、これにより、前記LEDユニットが前記反射板の第2の内面と接触することを特徴とする請求項29に記載の照明器具。
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EP11734679.1A EP2527729B1 (en) | 2010-01-19 | 2011-01-19 | Illumination apparatus |
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US20120287602A1 (en) | 2012-11-15 |
CN102713430B (zh) | 2015-07-08 |
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EP2527729A4 (en) | 2014-03-26 |
EP2527729A1 (en) | 2012-11-28 |
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CN102713430A (zh) | 2012-10-03 |
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