JP5374396B2 - lighting equipment - Google Patents

Abstract

Disclosed is a lighting apparatus, comprising a lengthwise LED unit (2), further comprising a plurality of light emitting devices (1) employing LED chips (10), arranged along one side in the thickness direction; an apparatus main body (100); a metallic reflector plate (110) that is supported by the apparatus main body (100); an illumination device (120) that is disposed upon the apparatus main body (100) and illuminates the LED unit (2); and a lengthwise radiator block (150) that is positioned upon the other side of the LED unit (2) in the thickness direction, is supported by the reflector plate (110), and radiates heat emitted by the LED unit (2). The reflector plate (110) is provided with an embedding portion (115), which is opened in a shape that corresponds to the exterior shape of the LED unit (2), and wherein the LED unit (2) is embedded; and a contact part (117), which makes surface-to-surface contact with the radiator block (150).

Description

  The present invention relates to a lighting fixture including a plurality of light emitting devices using LED chips.

  Conventionally, instead of a straight fluorescent lamp for a general lighting fixture installed on a ceiling or the like, a linear LED including a plurality of light emitting devices using LED chips and arranging the light emitting devices in a straight line It has been proposed to use a lamp (for example, Patent Document 1).

  Further, as shown in FIG. 15, the LED lamp 200 ″ disclosed in Patent Document 1 includes a light emitting device 1 ″ using an LED chip 10 ″ in a cylindrical pipe 201 ″ and a long substrate 204 ″. Are arranged in the longitudinal direction of the substrate 204 ″ on one surface side. The LED lamp 200 ″ also includes a heat radiating member 205 ″ for dissipating heat generated by the LED unit 202 ″.

  The above-described substrate 204 ″ is constituted by a double-sided printed wiring board using a glass epoxy resin as a base material, and the heat dissipation member 205 ″ is formed of aluminum. The light emitting device 1 ″ is a blue LED chip in which the LED chip 10 ″ emits blue light, and the fluorescent light that is excited by the blue light from the LED chip 10 ″ and emits yellow light to the resin package 11 ″. Body (not shown) is mixed.

JP 2009-272072 A (paragraphs [0012]-[0028] and FIGS. 1 and 2)

  By the way, in the LED lamp 200 ″ having the configuration shown in FIG. 15, a heat radiating member 205 ″ for radiating the heat generated in the light emitting device 1 ″ is accommodated in the pipe 201 ″. The size of the heat dissipating member 205 ″ is limited by the lamp weight. Therefore, sufficient heat dissipation characteristics cannot be obtained, and the temperature of the light emitting device 1 ″ is maintained even when the high-intensity light emitting device 1 ″ is used. Therefore, it is necessary to limit the input power to each LED chip 10 ″ so as not to exceed the permissible temperature (for example, the maximum junction temperature of the LED chip 10 ″). Further, since the LED lamp 200 ″ having the configuration shown in FIG. 15 requires the heat dissipation block 205 ″, the LED lamp 200 ″ itself is expensive.

  In addition, when an LED lamp is installed instead of the conventional fluorescent lamp for a straight fluorescent lamp, a construction for bypassing a ballast for lighting the straight fluorescent lamp is required. This has hindered the spread of lamps. In addition, since the lamp light distribution of the straight tube fluorescent lamp and the lamp light distribution of the LED lamp do not match, the lighting environment illuminated by the lighting fixture is different, and the same lighting space as that of the lighting fixture using the straight tube fluorescent lamp is obtained. Unable to change the atmosphere of the space. In short, when the LED lamp is turned on, the peripheral portion of the LED lamp on the reflector provided in the fixture body is dark, and an illumination effect using the reflector cannot be obtained (instead of the straight tube fluorescent lamp, the LED lamp is replaced with Doing so will change the light distribution characteristics of the luminaire). Further, since the directivity of the light emitting device is strong and the downward light is strong, the shadow of an object existing between the lighting fixture and the irradiated surface is likely to appear on the irradiated surface.

  On the other hand, the lighting fixture provided with the LED lamp called a straight tube | pipe fluorescent lamp type LED lamp and the lamp for exclusive use of the said LED lamp is proposed.

  However, even in such a lighting fixture, there is a problem that the heat dissipation characteristics of the LED lamp are limited by the lamp weight of the LED lamp, and it is difficult to increase the light output.

  The present invention has been made in view of the above-mentioned reasons, and the object thereof can be used as an alternative to a lighting fixture using a straight tube fluorescent lamp, and can suppress an increase in temperature of a light emitting device using an LED chip. Accordingly, an object of the present invention is to provide a lighting apparatus that can increase the light output.

The invention of claim 1 includes a LED units long, which is arranged along the longitudinal direction by a plurality of light emitting devices one side of the thickness direction using an LED chip, and the instrument body, is held in the fixtures body a metal reflector is controlled to be the target of the light distribution of the light from the L ED unit, a lighting device for lighting a provided et Re said L ED unit to the fixtures body, the thickness of the L ED unit and a heat sink block elongated radiating direction are arranged on the other side are held by the reflection plate heat generated by the L ED unit, the reflection plate, the outer peripheral shape of the L ED unit with embedded portion is provided with apertured the L ED unit is embedded into a shape corresponding to, will be contact piece is provided in surface contact with the surface of the LED unit side in the discharge heat block, said reflector , LE In the unit, the planar portion of the surface from which light is extracted from the light emitting device and the peripheral portion of the embedded portion on the reflective surface of the reflecting plate are substantially flush with the peripheral portion of the embedded portion. A height adjusting piece extending toward the heat dissipating block is provided, and the contact piece extends from the tip of the height adjusting piece to the side .

According to the present invention, a plurality of light emitting device using an LED chip is held and the LED units long, which is arranged along the longitudinal direction on the one side in the thickness direction, and the instrument body, said instrument instrument body said a metal reflector is controlled to be the target of the light distribution of light from the L ED unit, by the fixtures Re et al provided in the main body and a lighting device and for lighting the L ED unit, straight It becomes possible to use it as an alternative to a luminaire using a tube fluorescent lamp. Further, with the L ED unit wherein it is disposed on the other surface in the thickness direction L ED unit heat sink block elongated radiating generated heat of the the reflection plate, the outer peripheral shape of the L ED unit depending shape embedding portion apertured the L ED unit is embedded is provided, so the release heat block is held in the reflection plate, things Ku is limited by the weight of the release thermal block can set the size of the discharge heat block, heat generated in the light - emitting device is to be efficiently radiated through the release heat block. Further, the in reflection plate, the contact piece is provided to the LED unit side surface to surface contact in the discharge heat block, just rather than the release heat block heat generated by the light - emitting device the can also be dissipated from the reflection plate, thereby a higher output of the light output can also suppress an increase in the temperature of the light - emitting devices while achieving downsizing of the discharge heat block.

Further, according to this invention, the reflector, and a peripheral portion of the buried portion of the planar portion and the reflective surface of the reflector of the surface light is emitted from the light emitting device in the LED unit A height adjustment piece extending from the peripheral portion of the embedded portion to the heat radiating block side so as to be substantially flush with each other, and the contact piece extending from the front end portion of the height adjustment piece to the side. by that, since the pre-Symbol LED unit are made substantially flush with the peripheral portion of the buried part of the planar portion and the reflective surface of the reflector of the surface light is emitted from the light emitting device, wherein It is possible to suppress darkening of the peripheral portion of the light emitting device.

According to a second aspect of the present invention, in the first aspect of the invention, the LED unit has a circuit pattern that defines a connection relationship of the light emitting devices formed on one surface side opposite to the heat dissipation block side, and A plurality of window holes into which the respective light emitting devices are inserted are each provided with a circuit board having a thickness direction extending therethrough.

According to this invention, compared to the case where 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 .
According to a third aspect of the present invention, in the first or second aspect of the present invention, the LED unit is replaceably attached to the heat dissipation block, and the LED unit is mounted without removing the reflector from the instrument body. It can be exchanged.

  The invention of claim 1 can be used as an alternative to a lighting fixture using a straight tube fluorescent lamp, and has the effect that the temperature rise of the light emitting device using the LED chip can be suppressed and the light output can be increased. is there.

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 | schematic disassembled perspective view in which the lighting fixture same as the above was partially broken. It is a principal part schematic perspective view in which the lighting fixture same as the above was partially broken. It is a principal part schematic perspective view in which the lighting fixture same as the above was partially broken. It is a general | schematic disassembled perspective view of the light-emitting device in a lighting fixture same as the above. 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. It is a principal part schematic sectional drawing which shows the other structural example of a lighting fixture same as the above. It is a principal part schematic sectional drawing which shows the other structural example of a lighting fixture same as the above. It is a principal part schematic sectional drawing which shows the comparative example of a lighting fixture same as the above. It is a principal part schematic sectional drawing which shows the other structural example of a lighting fixture same as the above. The lighting fixture of Embodiment 2 is shown, (a) is a schematic exploded perspective view, (b) is a principal part schematic sectional drawing. The conventional LED lamp is shown, (a) is a principal part schematic perspective view, (b) is a schematic sectional drawing.

(Embodiment 1)
Hereinafter, the lighting fixture of this embodiment is demonstrated, referring FIGS.

  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. It has a U shape. Thus, 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. In addition, the material of the instrument main body 100 should just be a metal, and is not specifically limited.

  In the instrument main body 100, two bolt insertion holes 101a through which the two attachment bolts 310 suspended from the ceiling are inserted are drilled in the main piece 101. Thus, 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. Further, 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 has 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.

  In addition, 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. Here, the lighting device 120 is attached to the instrument main body 100 in a replaceable manner. In short, the lighting device 120 is provided in the instrument main body 100.

  As shown in FIG. 7, 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 is composed of 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. Here, 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.

  An attachment piece 143 for attaching the case 140 to the instrument main body 100 is provided projecting in the direction along the longitudinal direction at the rear part of both end faces in the longitudinal direction of the body 141. 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. Note that 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. Here, in each of the terminal devices 146 and 147, 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. In addition, what is necessary is just to employ | adopt a well-known structure suitably for the structure of the said quick connection terminal and the said cancellation | release button.

  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.

  Moreover, the lighting fixture of this embodiment is attached to the long LED unit 2 in which a plurality of light emitting devices 1 using the LED chip 10 are arranged along the longitudinal direction on one surface side in the thickness direction, and the fixture main body 100. And a metal reflector 110 that controls the light from the LED unit 2 so as to achieve a target light distribution. Here, the LED unit 2 has a plurality of light emitting devices 1 arranged in a straight line. The LED unit 2 includes the same number (eight in the illustrated example) of the light emitting devices 1 and a plurality of (four in the illustrated example) LED modules 2a having the same size. Yes. 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. . Here, 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. Here, 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.

  By the way, the reflecting plate 110 has an embedded portion 115 which 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. In the lighting fixture of the present embodiment, 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 substantially flush. However, this point will be described later.

  In addition, 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. In the translucent cover 180, 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. Thus, 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. 110 is detachably attached. When removing the translucent cover 180 from the reflector 110, 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.

  Moreover, the lighting fixture of this embodiment is arrange | positioned at the other surface side of the thickness direction of the LED unit 2, the LED unit 2 is attached so that replacement | exchange is possible, and the metal which dissipates the heat | fever which generate | occur | produced in the LED unit 2 (for example, Al, A heat radiation block 150 made of a metal having a high thermal conductivity such as Cu. 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.

  Here, the heat dissipating block 150 is fixed to the reflecting plate 110 by a fixing screw (not shown). In short, the heat dissipation block 150 is held by the reflector 110.

  As shown in FIG. 5 and FIG. 6, 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 (for example, a sealing resin) is enriched. Here, it is preferable that 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. Here, 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. More specifically, 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. Further, 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. Here, the LED chip 10 has an anode electrode (not shown) formed on one surface side (upper surface side in FIG. 6A) and a cathode electrode on the other surface side (lower surface side in FIG. 6A). Is formed. 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. In short, 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. Here, 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).

  In the present embodiment, 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 | similar to the plate 21. FIG. In consideration of light extraction efficiency, it is desirable to arrange the light emitting part on the side away from the heat transfer plate 21. However, in this embodiment, since the crystal growth substrate and the light emitting portion have the same refractive index, even if the light emitting portion is disposed on the side closer to the heat transfer plate 21, the light extraction loss becomes too large. There is nothing.

  The above-described wiring board 22 is provided with a pair of conductor patterns 23 and 23 for supplying 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. In addition, 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. Further, 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. In each conductor pattern 23, 23, 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. 5) to which the anode electrode of the LED chip 10 is electrically connected is indicated by “+ "Is formed. On the other hand, since the external connection electrode portion 23b (the left external connection electrode portion 23b in FIG. 5) to which the cathode electrode of the LED chip 10 is electrically connected is displayed, The polarities of both external connection electrode portions 23b and 23b in the light emitting device 1 can be visually recognized, and erroneous connection can be prevented.

  By the way, 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. Has been. Here, 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.

  As a material of the submount member 30, AlN having a relatively high thermal conductivity and an insulating property is adopted. On the other hand, in the LED chip 10, 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). , 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. In the case where 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. Here, when joining using AuSn, 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 that has 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.

  In the light emitting device 1 according to this embodiment, 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.

  In addition, 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. Thus, the light emitted from the side surface of the LED chip 10 can be prevented from being absorbed by the submount member 30, and the light extraction efficiency to the outside can be further increased. Here, 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. For example, the emission wavelength of the LED chip 10 It may be appropriately selected depending on the situation.

  As the sealing resin that is the sealing material of the sealing portion 50 described above, a silicone resin is used. However, 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. Here, in this embodiment, since 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. In addition, when 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.

  By the way, 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. Further, 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. In addition, 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. For example, white light can be obtained by mixing red phosphors and green phosphors. In addition, the color rendering can be improved when the red phosphor and the green phosphor are mixed.

  Here, 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. In addition, the color conversion member 70 is shape | molded so that the thickness along a normal line direction may become uniform irrespective of a position. In addition, 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).

  By the way, an example of a manufacturing method of the above-described light emitting device 1 will be briefly described. First, the LED chip 10 and the conductor patterns 23 and 23 are electrically connected to each other via two bonding wires 14. Thereafter, a liquid that becomes a part of the sealing portion 50 is formed in the gap between the submount member 30 and the wiring board 22 from the resin injection hole 28 (see FIG. 5) formed continuously in the window hole 24 of the wiring board 22. It hardens | cures, after inject | pouring sealing resin (for example, silicone resin). Next, liquid sealing resin (for example, silicone resin) which becomes the remaining portion of the sealing portion 50 described above is injected into the inside of the dome-shaped optical member 60. Subsequently, 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. At the same time, 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. However, even in such a manufacturing method, 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.

  Therefore, 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.

  Here, 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. In addition, 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. In short, the dam portion 27 also serves as a positioning portion for the color conversion member 70. Here, the number of the above-mentioned centering claw portions 27b is not limited to four, but it is desirable to provide at least three. Further, it is desirable that 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. In addition, an annular groove for positioning the color conversion member 70 may be provided on the mounting substrate 20 without providing the dam portion 27.

  Further, the color conversion member 70 has a notch 71 that engages with the weir 27 on the edge of the mounting substrate 20 side over the entire circumference. 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.

  The portions of the conductive patterns 23 and 23 on the mounting substrate 20 that are exposed outside the color conversion member 70 constitute the external connection electrode portions 23b and 23b.

  By the way, in the LED module 2a of the LED unit 2 described above, the 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. Here, 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. In addition, although Al is employ | adopted as a material of the base substrate 4, you may employ | adopt not only this but Cu etc., for example.

The LED module 2a is detachably attached to the heat dissipation block 150 using attachment screws 8 made of metal screws. Here, LED module 2a is a circuit board 3, with inner diameter than the outer diameter of the head 8a of the mounting screw 8 is large screw insertion hole 3e is formed, the base substrate 4, inner diameter than the outer diameter A small screw insertion hole 4e is formed. On the other hand, 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. Thus, 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. In addition, the stress generated in the light emitting device 1 due to the mounting screw 8 can be reduced. In the LED module 2a, 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. And bonded to the base substrate 4 by 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) containing a filler and having a low viscosity when heated. Has been. Here, the organic green sheet has electrical insulating properties, high thermal conductivity, high fluidity during heating, and high adhesion to uneven surfaces. However, since 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. When it is lowered and cured, the electrical insulation between the light emitting device 1 and the base substrate 4 is lowered. That is, there is a trade-off relationship between fixing performance and electrical insulation. Therefore, in this embodiment, separately from the adhesive layer 92, 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. In short, 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. Here, 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). In addition to being formed, the dimension in the short direction is slightly smaller than the dimension in the short side direction of the embedded portion 15. Thus, 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.

Further, a mirror 3d (see FIGS. 2 and 4) that reflects light from the light emitting device 1 is formed on the one surface side of the circuit board 3 described above. Here, the circuit board 3, the mirror 3d is is configured by a resist layer of white, most of the circuit pattern 3b is covered by the mirror 3d. The circuit board 3 has the circuit pattern 3b described above formed on one surface side of the organic insulating substrate. Here, 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. .

  Further, in order to prevent an overvoltage from being applied to the LED chip 10 of the light emitting device 1, 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.

  In the light emitting device 1, as shown in FIGS. 3 and 4, 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. As the terminal board 6, a jumper pin may be used.

  Moreover, the LED unit 2 has connected the circuit boards 3 of the adjacent LED module 2a so that all the light-emitting devices 1 may be connected in series. Here, 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. On the other hand, 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.

  By the way, 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 portion of the portion 115 is substantially flush. Here, in this embodiment, in the light emitting device 1, 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, and the surface of the protective layer 26 of the light emitting device 1 constitutes the planar portion of the LED unit 2. Yes. Here, in order to make the planar portion and the peripheral portion of the embedded portion 115 in the reflective surface 110 a of the reflective plate 110 substantially flush with each other, the reflective plate 110 extends from the peripheral portion of the embedded portion 115 to the heat dissipation block 150. A height adjustment piece 116 is extended to the side, and a contact piece 117 that is in surface contact with the heat dissipation block 150 is extended outward from the tip of the height adjustment piece 116. In the present embodiment, the surface of the mirror 3d of the circuit board 3 is substantially flush with the planar portion. In the present embodiment, as shown in FIG. 4, 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. Here, 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.

  In the lighting fixture of this embodiment demonstrated above, by providing the above-mentioned LED unit 2, the fixture main body 100, the reflecting plate 110, and the lighting device 120, it is an alternative to the lighting fixture using a straight tube fluorescent lamp. Can be used. Moreover, since the reflecting plate 110 is provided with 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 is held by the reflection plate 110, the heat dissipation block The size of the heat dissipation block 150 can be set without being limited by the weight of 150, and the heat generated in the light emitting device 1 is efficiently radiated through the heat dissipation block 150. Further, since the reflection plate 110 is provided with the contact piece 117 that comes into surface contact with the heat dissipation block 150, the heat generated in the light emitting device 1 can be dissipated not only from the heat dissipation block 150 but also from the reflection plate 110. While reducing the size of the block 150, the temperature rise of the light emitting device 1 can be suppressed, and the light output can be increased. In short, since the reflector 110 is also used as a heat radiating member, the heat radiating block 150 can be made small, and the weight and cost can be reduced. Here, if 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.

  Moreover, in the lighting fixture 100 of this embodiment, the reflection plate 110 includes the height adjustment piece 116, and the planar portion and the peripheral portion of the embedded portion 115 in the reflection surface 110a of the reflection plate 110 are substantially flush with each other. Therefore, it is possible to suppress the peripheral portion of the light emitting device 1 from becoming dark.

  In addition, since a plurality of window holes 3c into which each light emitting device 1 is inserted are provided in the circuit board 3 of the LED unit 2, on the separate circuit board that defines the connection relationship of the light emitting devices 1 in the LED unit 2. Compared with the case where each light-emitting device 1 is mounted, heat resistance from each light-emitting device 1 to the heat dissipation block 150 can be reduced, and heat dissipation can be improved.

  Moreover, since 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. . Here, by making the dimension in the short direction of the heat dissipation block 150 longer than the dimension in the short direction of the LED unit 2, the heat transferred from each light emitting device 1 can be transferred to a wider range. .

  Further, in the light emitting device 1 in the lighting fixture of the present embodiment, the air layer 80 is interposed between the dome-shaped color conversion member 70 and the optical member 60 as described above. Thus, of the light emitted from the LED chip 10 and incident on the color conversion member 70 through the sealing portion 50 and the optical member 60 and scattered by the phosphor particles of the color conversion member 70, 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. Moreover, 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.

  Further, since 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 | occur | produces, it can replace | exchange for LED module 2a unit instead of LED unit 2 whole, and can reduce replacement cost.

  Here, although 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. Further, if 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. In order to make the translucent cover 180 have a diffusing function, for example, the light diffusing material may be dispersed in the base material of the translucent cover 180.

  Moreover, since the thing of the structure similar to the lighting fixture for conventional straight tube | pipe fluorescent lamps can be used for the lighting fixture of this embodiment as the fixture main body 100 and the reflector adapter 150, it is the same as that of the said conventional lighting fixture. Easy to install. Further, if the external dimensions of the reflector 110 are set to the same external dimensions as those of the existing lighting fixtures, it is possible to perform construction in place of the existing lighting fixtures already installed. 301 can be used effectively, and it is possible to eliminate the need to reconstruct the ceiling material 300.

  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. In this case, 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. In the present embodiment, the plurality of light emitting devices 1 are connected in series. However, the connection relationship between the plurality of light emitting devices 1 is not particularly limited. For example, the light emitting devices 1 may be connected in parallel or connected in series. And parallel connection may be combined.

  By the way, 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. In the example shown in FIG. 8A, 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. In addition, 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. It has a letter shape. In other words, 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 shortened. 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.

  Here, in the example of FIG. 8A, 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. It is formed in a shape in which it is connected to 118b by a V-shaped connecting piece 118c. Further, in order to reduce variation in thermal resistance between the LED unit 2 and the heat dissipation block 150, for example, 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. Thus, the LED unit 2 and the heat dissipation block 150 are thermally coupled via the heat dissipation sheet 93.

  Therefore, in the case of adopting the configuration of FIG. 8A, in order to attach the LED unit 2 (LED module 2a) to the heat dissipation block 150, 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. Conversely, 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.

  In addition, as another example of means for detachably attaching the LED unit 2 to the heat dissipation block 150, 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. And 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. Here, 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. 9A, when the LED unit 2 is attached to the heat dissipation block 150, the distance between the tips of the contact pieces 119 of the leaf springs 119 arranged in the short direction of the LED unit 2 is increased. With the leaf spring 119 elastically deformed with a finger or the like, the base substrate 4 is inserted into the embedding part 115 with the LED unit 2 tilted from the horizontal plane, and then the LED unit 2 is pushed into the heat dissipation block 150 side. . When removing the LED unit 2 in a state where the leaf spring 119 is elastically deformed by a finger or the like so that the distance between the tips of the contact pieces 119 of the leaf springs 119 aligned in the short direction of the LED unit 2 is widened. Tilt and remove.

  The means for attaching the LED unit 2 to the heat dissipation block 150 is not limited to the above examples. For example, as shown in FIG. 10, 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. Further, instead of the configuration of FIG. 10, as shown in FIG. 11, 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. In the configuration of FIG. 11, the contact piece 117 is provided with a screw insertion hole 117 e through which the attachment screw 118 is inserted.

  8A, 9A, 10 and 11, as shown in FIG. 12, the heat dissipation block 150 is smaller than the structure not provided with the contact piece 117 described above. It is possible to improve the heat dissipation while achieving the improvement. In the example of FIG. 12, 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, and the heat transfer plate 21 and the heat dissipation block 150 are electrically connected. Insulated and thermally coupled.

  By the way, in the light emitting device 1 described above, when the white light can be emitted by the LED chip 10 alone, or when the phosphor is dispersed in the sealing portion 50, a structure without the color conversion member 70 described above is provided. Can be adopted.

  In the above-described example, 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. However, instead of the SiC substrate, a GaN substrate or a sapphire substrate is used. When a SiC substrate or a GaN substrate is used, 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. In this case, both the anode electrode and the cathode electrode can be directly connected to the conductor patterns 23 and 23 via the bonding wires 14. Moreover, the light radiated | emitted from LED chip 10 is not restricted to blue light, For example, purple light, ultraviolet light, etc. may be sufficient.

  Further, when the difference in linear expansion coefficient between the LED chip 10 and the heat transfer plate 21 in the mounting substrate 20 is relatively small, the submount member 30 is not necessarily provided. In the above-described light emitting device 1, 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. However, the chip size and number of the LED chips 10 are particularly limited. For example, 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).

  Further, the configuration of the LED unit 2 is not limited to the above-described examples. For example, as shown in FIG. But you can.

  In the example of FIG. 13, the circuit board 3 is attached to the heat dissipation block 150 using the attachment screws 8. Here, 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. Further, in order to reduce variation in thermal resistance between the LED unit 2 and the heat dissipation block 150, for example, 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. Thus, 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. 13 includes an LED chip 10, a mounting substrate 20 ′ 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. ing. Here, although 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 20 ′ has a housing recess 20a ′ 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) connected to is formed. In short, the LED chip 10 is flip-chip mounted on the mounting substrate 20 ′, and light is extracted through a sapphire substrate that is a crystal growth substrate. Here, the housing recess 20a 'in the mounting substrate 20' is opened in a circular shape, and the opening area gradually increases as the distance from the inner bottom surface increases. Further, 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 20a ′ of the mounting substrate 20 ′. It is bonded to the mounting substrate 20 ′ with a sealing material.

  The color conversion member 70 is formed in a sheet shape and is hermetically sealed to the mounting substrate 20 ′ so as to cover the optical member 65. In the light emitting device 1, the mounting substrate 20 ′ and the color conversion member 70 form a package, and the light emission surface 70 b of the color conversion member 70 is a surface of the LED unit 2 that extracts light from the light emitting device 1. A planar portion is formed.

(Embodiment 2)
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. Here, 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 lighting fixture, and the shapes of the reflector 110 and the reflector adapter 170 are different from those of the first embodiment. In addition, the same code | symbol is attached | subjected to the component similar to Embodiment 1, and description is abbreviate | omitted.

  As in the first embodiment, two bolt insertion holes 101a are drilled in the main piece 101 of the instrument main body 100. When mounting the instrument body 100 on the ceiling, the mounting bolt 310 protruding from the construction surface is inserted into the bolt insertion hole 101a, and the nut 108 is tightened through the washer 107 to the mounting bolt 310, thereby fixing the instrument body. 100 can be coupled to the mounting bolt 310.

  Moreover, the lighting device 120 in this embodiment is connected to each LED unit 2 so that each LED unit 2 is lighted. In short, 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. Here, 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.

  Further, the two LED units 2 are arranged so that their longitudinal directions are parallel to each other with the top portion of the reflecting plate 110 interposed therebetween.

  The lighting fixture of the present embodiment described above can be used as an alternative to a lighting fixture using a straight tube fluorescent lamp as in the first embodiment, and the temperature rise of the light emitting device 1 using the LED chip 10 can be suppressed. Therefore, the light output can be increased.

  In addition, the number of LED units 2 and the shape of the reflecting plate 110 are not limited to the structure of each said embodiment.

DESCRIPTION OF SYMBOLS 1 Light-emitting device 2 LED unit 2a LED module 3 Circuit board 3b Circuit pattern 3c Window hole 10 LED chip 100 Instrument main body 110 Reflector 110a Reflecting surface 115 Embedded part 120 Lighting device 150 Heat radiation block 116 Height adjustment piece 117 Contact piece

Claims (3)

And LED units long, which is arranged along the longitudinal direction by a plurality of light emitting devices one side of the thickness direction using an LED chip, and the instrument body, is held in the unit device body light from the L ED unit a metal reflector is controlled to be a target light distribution and a lighting device for lighting a provided et Re said L ED unit to the fixtures body, disposed on the other surface in the thickness direction of the L ED unit long and a heat dissipation block, said the reflection plate, the opening of the shape corresponding to the outer peripheral shape of the L ED unit for radiating heat generated in the L ED unit held by said reflection plate being wherein with embedded portion L ED unit is embedded is provided is made in contact piece is provided in surface contact with the surface of the LED unit side in the discharge heat block, said reflector, in the LED unit The heat radiation block extends from the peripheral portion of the embedded portion so that the planar portion of the surface from which light is extracted from the light emitting device and the peripheral portion of the embedded portion on the reflective surface of the reflecting plate are substantially flush with each other. A lighting fixture comprising: a height adjusting piece extending to the side, wherein the contact piece extends from the tip of the height adjusting piece to the side . In the LED unit, 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. The lighting apparatus according to claim 1, further comprising a circuit board penetrating in a direction . Wherein and LED unit is replaceably attached to the heat sink block, according to claim 1 or claim 2, wherein the said reflecting plate is replaceable the LED unit without removing from the instrument body Lighting fixtures.

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