JP2016018745A - Light emitting device, illumination lamp, and lighting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light emitting device achieving high illuminance, and to provide an illumination lamp and a lighting device.SOLUTION: A light emitting device includes: a first laser beam source 11 which emits a first laser beam; a second laser beam source 12 which emits a second laser beam having a wavelength different from that of the first laser beam; a multiplex part 31A which multiplexes the first laser beam emitted from the first laser beam source 11 and the second laser beam emitted from the second laser beam source 12; a first light guide part 30 into which the first laser beam and the second laser beam multiplexed by the multiplex part 31A enter, the first light guide part 30 which transmits the first laser beam and the second laser beam between a first surface 33a and a second surface 33B facing each other; and a reflection part 32 which is provided at the first surface 33A side and reflects the first laser beam and the second laser beam to the second surface 33B side.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a light emitting device, an illumination lamp, and an illumination device.

  2. Description of the Related Art Conventionally, a light emitting device that emits light from a light extraction surface of a light guide plate by entering laser light from an incident end of the light guide plate is known. For example, in the light-emitting device described in Patent Document 1 below, a laser light source disposed facing the incident end of the light guide plate makes laser light incident on the light guide plate.

JP 2006-73202 A (pages 5-6, FIG. 2)

  However, in the light emitting device described in Patent Document 1, since laser light is incident only from the laser light source disposed opposite to the incident end of the light guide plate, light having a desired illuminance is emitted from the light extraction surface. It may not be obtained.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to obtain a light-emitting device, an illumination lamp, and an illumination device with high illuminance.

  The light-emitting device of the present invention is emitted from a first laser light source that emits a first laser light, a second laser light source that emits a second laser light having a wavelength different from the first laser light, and a first laser light source. A combining unit that combines the first laser beam and the second laser beam emitted from the second laser light source, and the first laser beam and the second laser beam combined by the combining unit are incident and face each other. A first light guide that propagates the first laser light and the second laser light between the first surface and the second surface, and the first laser light provided on the first surface side and the first laser light on the second surface side. And a reflecting portion that reflects the second laser light.

  According to the present invention, since the first laser beam and the second laser beam combined by the combining unit are incident on the first light guide unit, the light emitting device, the illumination lamp, and the illumination device with high illuminance are provided. Can be obtained.

It is a perspective view of the illuminating device provided with the illumination lamp which concerns on Embodiment 1 of this invention. It is a perspective view of the illumination lamp of FIG. It is the schematic sectional drawing which described AA cross section of FIG. 2 roughly. FIG. 4 is an enlarged view in which both ends of the cross-sectional view of FIG. 3 are enlarged. It is the schematic sectional drawing which described CC section of FIG. 4 roughly. FIG. 6 is a schematic cross-sectional view schematically illustrating a DD cross section of FIG. 5. It is a block diagram of the illuminating device of FIG. It is a graph which shows an example of the characteristic of the light source unit and wavelength conversion part which are shown in FIG. It is the modification 1 of the block diagram described in FIG. It is the modification 1 of the illuminating device described in FIG. It is the schematic sectional drawing which described roughly the EE cross section of the part of the illumination lamp of the illuminating device shown in FIG. It is the schematic sectional drawing which described roughly the cross section (CC cross section of FIG. 4) of the illumination lamp which concerns on Embodiment 2 of this invention. It is a block diagram of the illumination lamp of FIG. It is the schematic sectional drawing which described roughly the cross section (DD cross section of FIG. 5) of the illumination lamp which concerns on Embodiment 3 of this invention. It is the schematic sectional drawing which described roughly the cross section of the light-emitting device concerning Embodiment 4 of this invention.

  Embodiments of the present invention will be described below with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals, and the description thereof is omitted or simplified as appropriate. Further, the size and arrangement of the configurations shown in the drawings can be appropriately changed within the scope of the present invention.

Embodiment 1 FIG.
FIG. 1 is a perspective view of an illumination device 600 including an illumination lamp 1 in which a light emitting device 7 according to Embodiment 1 of the present invention is housed. The light emitting device 7, the illumination lamp 1, and the illumination device 600 according to this embodiment can obtain light with high illuminance.

[Lighting device]
The lighting device 600 is attached to a ceiling, for example, via a fixture (not shown). The illumination device 600 includes a detachable illumination lamp 1 and a luminaire 500 that supplies power to the illumination lamp 1 to turn on the illumination lamp 1. When the illumination lamp 1 is turned on, light is irradiated to the floor, indoor space, and the like.

  The lighting fixture 500 includes a fixture main body 140 and a reflector 115 disposed on the upper side of the lighting lamp 1. The lighting fixture 500 includes a pair of sockets 100 that are electrically connected to the caps 5 (see FIG. 2) provided at both ends of the lighting lamp 1. The socket 100 also has a role of mechanically supporting the illumination lamp 1. The instrument main body 140 houses an AC-DC converter 130. The AC-DC conversion unit 130 supplies power to the illumination lamp 1 via the socket 100 when a switch (not shown) is switched to an ON state, and supplies power to the illumination lamp 1 when the switch is switched to an OFF state. It will stop.

[Lighting lamp]
FIG. 2 is a perspective view of the illumination lamp 1 shown in FIG. The illumination lamp 1 includes, for example, a cover 4 which is a cylindrical outer shell, a pair of caps 5 attached to both ends of the cover 4, and a light emitting device 7 (see FIG. 3) housed in the cover 4. ing. The illumination lamp 1 is a straight tube type that is long and has a cylindrical outer shape.

[cover]
The cover 4 is a cylindrical member formed so that the peripheral wall extends parallel to the longitudinal direction (arrow Y direction). The cover 4 houses the light emitting device 7 therein. The cover 4 has translucency and transmits light emitted from the light emitting device 7 to the outside. The cover 4 is obtained, for example, by extruding a resin material. As the resin material constituting the cover 4, for example, polycarbonate (PC) or acrylic (PMMA) is used.

  The cover 4 can have optical functions such as diffusion, reflection, and color rendering depending on the design specifications of the illumination lamp 1. For example, the cover 4 is formed of a resin material mixed with a diffusing material so as to be a milky white tube that diffuses and transmits light. In addition, as a material which comprises the cover 4, it is not limited to a resin material, For example, you may employ | adopt the hybrid type etc. with which glass etc. mixed in the glass tube or resin.

  The cover 4 may be configured to have a region where light is emitted at least partially. For example, the cover 4 is made of a translucent resin on the exit side of the illumination lamp 1 and the other part is made of a white highly reflective resin. Further, the cover 4 may be another cylindrical tube such as a rectangular tube or a semi-cylindrical section. Further, the cover 4 may be a plate-like member that covers only the emission side of the illumination lamp 1.

[Base]
The base 5 is attached to both ends of the cover 4. The base 5 is inserted into both sides of the socket 100 shown in FIG. When the base 5 is inserted into the socket 100, the lighting lamp 1 is mechanically supported by the lighting fixture 500 and is electrically connected to the lighting fixture 500. The base 5 may be a base such as a G13 type, but is not limited thereto, and other types of bases may be employed.

  As shown in FIG. 2, the base 5 includes a conductive power supply terminal 51 and an insulating base housing 50 in which the power supply terminal 51 is embedded. The power supply terminal 51 and the base casing 50 are integrally formed by, for example, insert molding.

  The power supply terminal 51 is made of, for example, a conductive metal, and the base casing 50 is made of, for example, an insulating resin material. The power supply terminal 51 is subjected to, for example, a plating process for preventing oxidation. When insulation between the base case 50 and the power supply terminal 51 is ensured, the base case 50 may be made of metal.

[Internal structure of lighting lamp]
Next, the internal configuration of the illumination lamp 1 will be described with reference to FIGS. 3 is a schematic cross-sectional view schematically showing a cross section AA in FIG. 2, FIG. 4 is an enlarged view in which both ends of the cross-sectional view in FIG. 3 are enlarged, and FIG. FIG. 6 is a schematic cross-sectional view schematically showing a cross-section -C, and FIG. 6 is a schematic cross-sectional view schematically showing a cross-section DD in FIG. The illumination lamp 1 accommodates a heat radiating unit 6 and a light emitting device 7 in an internal space covered with a cover 4 and a base 5.

[Light emitting device]
The light emitting device 7 includes a light source unit 10 and an optical unit 20. The light source unit 10 includes a first light source unit 11 and a second light source unit 12, and the optical unit 20 includes a first optical unit 21 and a second optical unit 22.

[First light source unit]
The first light source unit 11 emits light toward the first optical unit 21 from one end side (right side in FIG. 3) in the longitudinal direction (arrow Y direction) of the illumination lamp 1. The 1st light source unit 11 is attached to the nozzle | cap | die 5 installed in the one edge part side of the cover 4, for example. For this reason, the first light source unit 11 is positioned only by attaching the base 5 to the cover 4. The light emitted from the first light source unit 11 enters the first optical unit 21.

  The first light source unit 11 includes a laser light source package 110 and a DC-DC converter 114 installed on a substrate 113. The substrate 113 is composed of, for example, a rigid substrate or a flexible substrate. The substrate 113 is connected to the power supply terminal 51 of the base 5 by a method such as soldering, and is electrically and mechanically connected to the base 5.

  On the substrate 113, electrode pads, wiring patterns, etc., not shown, are formed. As a material constituting the electrode pad and the wiring pattern, a metal having a small electrical resistance such as copper or aluminum is employed. On the substrate 113, for example, a white resist is applied to form a resist film portion. The resist film portion protects the wiring pattern and improves the insulation between the wirings. The resist film portion also has a function of reflecting light. Note that a reflective sheet for reflecting light may be attached to the substrate 113.

  The DC-DC converter 114 supplies drive power to the laser light source package 110. The DC-DC conversion unit 114 is an electric circuit including electronic components mounted on the substrate 113, for example. When power is supplied to the substrate 113 via the power supply terminal 51 of the base 5, the DC-DC converter 114 supplies drive power to the laser light source package 110.

  The laser light source package 110 is a laser light source that emits laser light. The laser light source package 110 is fixed by, for example, a method of soldering the lead terminals 110B on the electrode pads of the substrate 113. A plurality of laser light source packages 110 are arranged in a row in accordance with the shape of the incident end 31 of the first optical unit 21. The laser light source package 110 is installed with a gap between the incident end portion 31 of the first optical unit 21. Therefore, the heat of the laser light source package 110 is configured not to be transmitted to the first optical unit 21. In the example of this embodiment, the laser light source packages 110 arranged in a straight line form a laser beam incident on the incident end portion 31 of the first optical unit 21.

  The laser light source package 110 includes a laser light source 111 that emits laser light and a condenser lens 112 that condenses the laser light. The laser light source 111 is supplied with driving power from the DC-DC converter 114 and emits laser light. The laser light source 111 of this embodiment emits laser light in a blue band of about 400 to 480 nm, for example, but may emit laser light in other wavelength ranges. The laser beam condensed by the condenser lens 112 is emitted from the laser light source package 110 toward the incident end 31 of the first optical unit 21. In the example of this embodiment, the laser light source package 110 has been described as including the condenser lens 112 that condenses the laser light. However, the first optical unit 21 described later is optimized for the laser radiation angle. In this design, the condensing lens 112 may be omitted. For example, when the laser light source package 110 and the incident end 31 of the first optical unit 21 are close to each other, the condenser lens 112 can be omitted.

  In addition, instead of the laser light source package 110 in which one semiconductor chip is packaged as illustrated, a configuration in which a semiconductor chip is directly mounted on the substrate 113 such as a chip on board (COB) may be used. The semiconductor laser array in which the semiconductor chip is packaged may be directly mounted on the substrate 113. Further, the number, arrangement, and type of the laser light source packages 110 can be appropriately changed according to the application of the illumination lamp 1 and the like. Further, instead of using the laser light source package 110, another light source such as an LED light source package may be used.

[First optical unit]
The first optical unit 21 is a long plate-like member extending along the longitudinal direction (arrow Y direction) of the illumination lamp 1. The flat plate-like first optical unit 21 has an incident end 31 on one end side in the longitudinal direction (the right side in FIG. 3). The first optical unit 21 receives laser light from the incident end 31 and emits emitted light to the emission side of the illumination lamp 1.

  The first optical unit 21 includes a first light guide unit 30, a reflection unit 32, and a wavelength conversion unit 34. The reflection unit 32 and the wavelength conversion unit 34 are arranged on both sides of the first light guide unit 30 so as to face each other. Specifically, the reflection unit 32 is disposed on the first surface 33A side of the first light guide unit 30, and the wavelength conversion unit 34 is disposed on the second surface 33B side facing the first surface 33A of the first light guide unit 30. ing. As will be described later, the reflecting portion 32 is not disposed on the path (between the mirror portion 222 and the dichroic mirror portion 31A) for allowing the light emitted from the second optical unit 22 to enter the first optical unit 21. The first optical unit 21 according to this embodiment is a laminated member in which the reflection unit 32, the first light guide unit 30, and the wavelength conversion unit 34 are integrally laminated. The first optical unit 21 may be configured such that the first light guide unit 30, the reflection unit 32, and the wavelength conversion unit 34, which are separately configured, are integrally laminated. Further, the wavelength conversion unit 34 may be disposed away from the first light guide unit 30.

  Note that reflection elements may be further provided at both ends extending along the longitudinal direction of the first optical unit 21 so that light does not leak from the both ends. Further, a reflection element may be further provided between the first light guide unit 30 and the wavelength conversion unit 34 so that the number of repetitions of reflection is increased to make the light more uniform. These reflective elements are provided, for example, by forming a vapor deposition film such as aluminum at the corresponding location.

  The 1st light guide part 30 is a plate-shaped member formed with the material which has translucency, such as an acryl (PMMA), a polycarbonate (PC), or glass, for example. An incident end 31 is formed at one end in the longitudinal direction of the first light guide 30.

  The incident end portion 31 also serves as a multiplexing portion on which a dichroic mirror portion 31A formed by coating a dielectric multilayer film, for example. The dichroic mirror unit 31A has a function of reflecting a specific wavelength and transmitting other wavelengths. The dichroic mirror unit 31A according to this embodiment transmits light emitted from the first light source unit 11, reflects light emitted from the second light source unit 12 described later, and transmits these lights to the first light guide. The light is incident on the optical unit 30. The incident end portion 31 that also serves as a multiplexing portion is formed so that the first surface 33A side of the first light guide portion 30 protrudes toward the first light source unit 11 side rather than the second surface 33B side.

  Light incident from the incident end 31 is propagated along the longitudinal direction of the first light guide 30. That is, while the light incident from the incident end 31 is repeatedly reflected between the first surface 33A on the heat dissipation unit 6 side of the first light guide 30 and the second surface 33B facing the first surface 33A, It propagates in the longitudinal direction of the first light guide 30.

  The reflection part 32 is a convex-shaped structure pattern formed on the first surface 33A side of the first light guide part 30, for example. When the light propagated in the longitudinal direction of the first light guide portion 30 enters the convex reflection portion 32, it is reflected by the curved surface. At this time, light that does not satisfy the total reflection condition at the interface of the first light guide 30 is generated, and the light travels toward the second surface 33 </ b> B of the first light guide 30. The light reflected by the reflection unit 32 passes through the second surface 33B and enters the wavelength conversion unit 34.

  The arrangement density of the structural pattern of the reflection portion 32 formed on the first surface 33 </ b> A side of the first light guide portion 30 changes according to the position with respect to the first light source unit 11. For example, depending on the position with respect to the first light source unit 11, the number or size of the structural pattern of the reflecting unit 32 per unit area or the shape thereof may be changed, or the shape may be changed. The light quantity distribution in the longitudinal direction (Y direction) of the light emitted from the second surface 33B is made uniform. In addition, the structural pattern of the reflection part 32 is not limited to a convex shape. In other words, the structure pattern of the reflecting portion 32 may be a prism shape, a random uneven pattern shape, or the like. The structural pattern of the reflecting portion 32 can be formed by appropriately selecting a method such as press molding, punching, cutting, sand blasting or the like according to the shape. In addition, the reflection section 32 having a diffusion function may be formed on the first surface 33A side of the first light guide section 30.

  Further, the thickness distribution of the first optical unit 21 may be adjusted so as to make the light quantity distribution of light uniform. In addition, the first light guide 30 may be formed of a plurality of layers having different refractive indexes so as to adjust the total reflection condition of the first light guide 30 and make the light quantity distribution of light uniform. . The plurality of layers of the first light guide unit 30 are formed of different materials, for example, or formed by adding germanium (Ge), phosphorus (P), or the like to a substrate of the same material. The reflection unit 32 reflects not only the laser light propagating through the first light guide unit 30 but also the light emitted by the wavelength conversion unit 34.

  A wavelength converter 34 is disposed on the second surface 33 </ b> B side of the first light guide 30. The wavelength converter 34 converts the wavelength of the laser light emitted from the second surface 33B. The wavelength conversion unit 34 is, for example, a fluorescent unit including a phosphor. The wavelength conversion unit 34 receives the laser light emitted from the second surface 33B, emits light at a wavelength different from the laser light, and transmits the laser light. .

  The light incident on the wavelength conversion unit 34 is irradiated on the phosphor of the wavelength conversion unit 34 to be converted into yellow light, and passes through the wavelength conversion unit 34 while being appropriately scattered. As a result, light of a desired color temperature (for example, white) can be obtained by mixing blue laser light and yellow fluorescence. That is, the wavelength converter 34 emits light in which laser light having a blue band wavelength and yellow fluorescence emitted from the wavelength converter 34 when excited by the laser light having a blue band wavelength are mixed. At this time, speckle noise of the blue laser light is reduced in the coherence due to scattering in the wavelength conversion unit 34, so that speckle noise of the light emitted from the wavelength conversion unit 34 is reduced.

  The wavelength converter 34 is formed, for example, by mixing phosphors such as YAG, silicate, casoon, sialon, and thiogallate in an epoxy resin or a silicone resin. In the example of this embodiment, the wavelength conversion unit 34 is a phosphor layer formed by being applied to the second surface 33B of the first light guide unit 30. In the wavelength conversion unit 34, phosphors are uniformly dispersed. The phosphor of the wavelength converter 34 is excited by blue laser light and emits light having a yellow wavelength. The blue laser light and yellow fluorescence are mixed, and the white light emitted from the wavelength converter 34 is diffused by the cover 4 and emitted from the illumination lamp 1.

[Second light source unit]
The second light source unit 12 emits light toward the second optical unit 22 from the other end side (left side in FIG. 3) in the longitudinal direction (arrow Y direction) of the illumination lamp 1. The 2nd light source unit 12 is attached to the nozzle | cap | die 5 installed in the other edge part side of the cover 4, for example. For this reason, the second light source unit 12 is positioned only by attaching the base 5 to the cover 4. The light emitted from the second light source unit 12 is incident on the second optical unit 22.

  The second light source unit 12 includes a laser light source package 120 and a DC-DC converter 124 installed on the substrate 123. The substrate 123 is configured by, for example, a rigid substrate or a flexible substrate. The substrate 123 is connected to the power supply terminal 51 of the base 5 by a method such as soldering, and is electrically and mechanically connected to the base 5.

  On the substrate 123, electrode pads, wiring patterns, etc., not shown, are formed. As a material constituting the electrode pad and the wiring pattern, a metal having a small electrical resistance such as copper or aluminum is employed. On the substrate 123, for example, a white resist is applied to form a resist film portion. The resist film portion protects the wiring pattern and improves the insulation between the wirings. The resist film portion also has a function of reflecting light. Note that a reflective sheet for reflecting light may be attached to the substrate 123.

  The DC-DC converter 124 supplies driving power to the laser light source package 120. The DC-DC converter 124 is an electric circuit including electronic components mounted on the substrate 123, for example. When power is supplied to the substrate 123 via the power supply terminal 51 of the base 5, the DC-DC converter 124 supplies drive power to the laser light source package 120.

  The laser light source package 120 is a laser light source that emits laser light. The laser light source package 120 is fixed by, for example, a method of soldering the lead terminal 120B on the electrode pad of the substrate 123. The plurality of laser light source packages 120 are arranged in a row in accordance with the shape of the incident end 221 of the second optical unit 22. The laser light source package 120 is installed with a gap between the incident end 221 of the second optical unit 22. Therefore, the heat of the laser light source package 120 is configured not to be transmitted to the second optical unit 22. In the example of this embodiment, the laser light source packages 120 arranged in a straight line form a laser beam incident on the incident end 221 of the second optical unit 22.

  The laser light source package 120 includes a laser light source 121 that emits laser light and a condenser lens 122 that condenses the laser light. The laser light source 121 receives the supply of driving power from the DC-DC converter 124 and emits laser light. The laser light source 121 of this embodiment emits laser light in a blue band of about 400 to 480 nm, for example, but may emit laser light in other wavelength ranges. The laser beam condensed by the condenser lens 122 is emitted from the laser light source package 120 toward the incident end 221 of the second optical unit 22. In the example of this embodiment, the laser light source package 120 has been described as having the condenser lens 122 that condenses the laser light. However, the second optical unit 22 described later is optimized for the laser radiation angle. In this design, the condensing lens 122 may be omitted. For example, when the laser light source package 120 and the incident end 221 of the second optical unit 22 are close to each other, the condenser lens 122 can be omitted.

  Instead of the laser light source package 120 in which one semiconductor chip is packaged as illustrated, a configuration in which a semiconductor chip is directly mounted on the substrate 123 such as a chip on board (COB) may be used. A configuration using a semiconductor laser array in which these semiconductor chips are packaged may be used. Further, the number, arrangement, and type of the laser light source packages 120 can be appropriately changed according to the use of the illumination lamp 1 and the like. Further, instead of using the laser light source package 120, another light source such as an LED light source package may be used.

[Second optical unit]
The second optical unit 22 is a long plate-like member extending along the longitudinal direction (arrow Y direction) of the illumination lamp 1. The second optical unit 22 is disposed on the first surface 33 </ b> A side of the first optical unit 21 in parallel with the first optical unit 21. The second optical unit 22 has a second light guide unit 220. For example, the refractive index between the first optical unit 21 and the second optical unit 22 is higher than that of the first light guide unit 30 of the first optical unit 21 and the second light guide unit 220 of the second optical unit 22. A low resin layer is formed, and the first optical unit 21 and the second optical unit 22 are integrally formed.

  The flat plate-like second optical unit 22 has an incident end 221 on the other end side in the longitudinal direction (left side in FIG. 3). The second optical unit 22 receives laser light from the incident end 221 and propagates the laser light toward the dichroic mirror portion 31 </ b> A of the first optical unit 21.

  The second optical unit 22 has an incident end 221 on the other end side on the second light source unit 12 side, and has a mirror part 222 on one end side (right side in FIG. 3). The incident end part 221 and the mirror part 222 are formed in the second light guide part 220.

  The second light guide unit 220 is a plate-like member formed of a light-transmitting material such as acrylic (PMMA), polycarbonate (PC), or glass. The incident end 221 formed at the other end of the second light guide 220 is formed, for example, as a flat surface or a curved surface so that the light from the second light source unit 12 can be efficiently incident. Here, the curved surface includes a surface formed in a texture pattern. The mirror part 222 formed at one end of the second light guide part 220 is formed, for example, by forming a vapor deposition film such as aluminum on the second light guide part 220. The mirror unit 222 is disposed so that the first optical unit 21 side protrudes toward the first light source unit 11 side and is inclined.

  The light incident from the incident end 221 is propagated along the longitudinal direction of the second light guide unit 220. That is, while the light incident from the incident end 221 is repeatedly reflected between the first surface 220A of the second light guide unit 220 on the heat dissipation unit 6 side and the second surface 220B facing the first surface 220A, It propagates in the longitudinal direction of the second light guide 220. The light propagated to the other end side of the second light guide unit 220 is reflected by the mirror unit 222 and is incident on the dichroic mirror unit 31 </ b> A of the first optical unit 21. In the example of this embodiment, the reflection unit 32 is not disposed between the mirror unit 222 and the dichroic mirror unit 31A so that the light reflected by the mirror unit 222 is incident on the dichroic mirror unit 31A. It is configured. In addition, when the reflection part 32 is comprised so that the light reflected by the mirror part 222 may be permeate | transmitted, the reflection part 32 is extended between the mirror part 222 and the dichroic mirror part 31A, and is a mirror part. It may be arranged between 222 and the dichroic mirror part 31A.

[Optical unit holding structure]
The first optical unit 21 and the second optical unit 22 are held on the cover 4 by a support portion 43 formed inside the cover 4. The support portions 43 are grooves formed at two locations on the inner surface 41 of the cover 4. The groove constituting the support portion 43 is formed along the longitudinal direction of the cover 4, and an end portion parallel to the longitudinal direction of the first optical unit 21 is inserted.

  When the end portions of the first optical unit 21 and the second optical unit 22 that are parallel to the longitudinal direction are inserted into the support portion 43, movements other than the longitudinal direction are restricted and are reliably supported in the cover 4. The support portion 43 is formed with a positioning portion (not shown) for positioning the positions along the longitudinal direction of the first optical unit 21 and the second optical unit 22. For example, the first optical unit 21 and the second optical unit 22 are positioned by the positioning unit, and then the first optical unit 21 and the second optical unit 22 are bonded to the cover 4, thereby the first optical unit 21. The position in the longitudinal direction is regulated.

  Since the first optical unit 21 and the second optical unit 22 are preferably arranged at a position including the center of the cover 4, the first optical unit 21 and the second optical unit 22 can be enlarged. Moreover, since the space | interval between the 1st optical unit 21 and the light-projection surface of the cover 4 can be separated, the big diffusion effect can be acquired. Further, the first optical unit 21 has a flat plate shape, and the light emitting surface of the cover 4 has a cylindrical shape. At the central position where light is strongly irradiated along the short direction of the first optical unit 21, the distance between the first optical unit 21 and the exit surface of the cover 4 is large, so that a large diffusion effect is obtained. Can do. As a result, uniform light can be emitted from the outer surface 40 of the cover 4.

[Heat dissipation unit]
The heat dissipation unit (heat sink) 6 is disposed between the pair of caps 5 and extends along the longitudinal direction of the illumination lamp 1. The heat dissipation unit 6 has uneven fins 61 and has a large surface area. Screw mounting portions 60 are formed at both ends of the heat dissipation unit 6. Further, a screw attachment portion (through hole) 52 is formed in the base 5. The screw mounting portion 60 of the heat radiating unit 6 and the screw mounting portion 52 of the base 5 are positioned so as to be aligned with each other, and are screwed with screws 8. For example, after the base 5 and the heat dissipation unit 6 are screwed, the adhesive member 9 is filled between the base 5 and the cover 4. The heat radiating unit 6 is disposed on the second surface 220B side of the second optical unit 22 with a gap from the second optical unit 22, and the heat of the heat radiating unit 6 is directly applied to the second optical unit 22. Is not transmitted to.

  Since the heat dissipation unit 6 extends from one end side of the cover 4 to the other end side and is attached to the base 5, deformation of the cover 4 and the first optical unit 21 installed on the cover 4 is suppressed. Moreover, since the heat radiating unit 6 is enlarged, heat generation of the first light source unit 11 can be suitably suppressed.

  Operating heat generated from the laser light source 111 is transmitted to the heat radiating unit 6 through the substrate 113, and is emitted from the cover 4 and the base 5 to the outside of the illumination lamp 1. Note that a holder 110 </ b> A that also serves as a heat dissipation plate may be erected from the substrate 113 so as to promote heat dissipation. The holder 110A is formed of a material having thermal conductivity, and is formed of a metal material such as iron, aluminum, or an alloy containing these. The holder 110A is obtained, for example, by extruding a metal material. The holder 110A may be made of a highly heat conductive resin or the like mixed with a ceramic having heat conductivity or a heat conductive filler. Further, in order to increase the thermal conductivity between the substrate 113 and the heat dissipation unit 6, for example, a heat conductive resin may be filled between the substrate 113 and the heat dissipation unit 6.

  Further, the operating heat generated from the laser light source 121 is transmitted to the heat radiating unit 6 through the substrate 123 and is released from the cover 4 and the base 5 to the outside of the illumination lamp 1. Note that a holder 120 </ b> A that also serves as a heat dissipation plate may be erected from the substrate 123 so as to promote heat dissipation. The holder 120A is formed of a material having thermal conductivity, and is formed of a metal material such as iron, aluminum, or an alloy containing these. The holder 120A is obtained, for example, by extruding a metal material. The holder 120A may be made of a highly heat conductive resin or the like in which a ceramic having heat conductivity or a heat conductive filler is mixed. Moreover, in order to improve the thermal conductivity between the board | substrate 123 and the thermal radiation unit 6, you may fill with thermal conductive resin between the board | substrate 123 and the thermal radiation unit 6, for example.

  The heat dissipation unit 6 is formed of a material having thermal conductivity, and is formed of, for example, a metal material such as iron, aluminum, or an alloy containing these. The heat dissipation unit 6 is obtained, for example, by extruding a metal material. Further, the heat dissipation unit 6 may be made of a highly heat conductive resin or the like mixed with a ceramic having heat conductivity or a heat conductive filler.

  In addition, a reflective sheet is affixed on the main surface 62 of the heat radiating unit 6 or a reflective paint is applied to form a reflective surface. The light emitted toward the heat radiating unit 6 is reflected by the main surface 46 of the heat radiating unit 6 and is incident on the first optical unit 21. Alternatively, an insulating layer and a circuit pattern are formed on the main surface 62 of the heat radiating unit 6, and a laser light source package, a DC-DC converter, and the like are mounted.

  The heat dissipation unit 6, the holder 110A, and the holder 120A may be integrally formed in a U-shape. By doing in this way, since the operating heat of the laser light source 111 and the laser light source 121 is more efficiently transmitted to the heat radiating unit 6, the operating temperature of the laser light source 111 and the laser light source 121 can be suppressed, and illumination The reliability of the lamp 1 can be improved.

  FIG. 7 is a block diagram of the illumination device 600 shown in FIG. The AC voltage input from the AC power source is input to the AC-DC conversion unit 130 of the instrument main body 140. The AC-DC conversion unit 130 is configured by an electric circuit, and rectifies an input AC voltage and converts it into a DC voltage. The DC voltage converted by the AC-DC converter 130 is input to the DC-DC converter 114 and the DC-DC converter 124 via the power supply terminal 51 of the base 5 of the illumination lamp 1 attached to the socket 100. The The DC-DC conversion unit 114 and the DC-DC conversion unit 124 are, for example, electric circuits that perform DC-DC conversion, and output DC power that drives the laser light source 111 and the laser light source 121.

[Phosphor emission]
FIG. 8 is a graph illustrating an example of characteristics of the first light source unit 11, the second light source unit 12, and the wavelength conversion unit 34 illustrated in FIG. The wavelength converter 34 includes a first phosphor having an excitation spectrum B and a fluorescence spectrum C, and a second phosphor having an excitation spectrum E and a fluorescence spectrum F. Since the wavelength A of the blue laser light emitted from the first light source unit 11 is close to the peak of the excitation spectrum B of the phosphor of the wavelength converter 34, the phosphor of the wavelength converter 34 can be excited efficiently. Further, since the wavelength D of the blue laser light emitted from the second light source unit 12 is close to the peak of the excitation spectrum E of the phosphor of the wavelength conversion unit 34, the phosphor of the wavelength conversion unit 34 can be excited efficiently. it can. Further, since the laser light emitted from the first light source unit 11 and the second light source unit 12 is light having a single wavelength, it is mixed with the wavelength of the fluorescence emitted from the phosphor to obtain light having a desired color temperature. Can do.

[Effect of illumination lamp according to Embodiment 1]
As described above, the laser light emitted from the first light source unit 11 is combined with the laser light emitted from the second light source unit 12 by the dichroic mirror unit 31A. That is, the laser light emitted from the second light source unit 12 propagates through the second light guide unit 220 and enters the mirror unit 222. The laser light incident on the mirror unit 222 is reflected toward the dichroic mirror unit 31A. The laser beam combined by the dichroic mirror unit 31A is reflected by the reflection unit 32 while propagating through the first light guide unit 30, and is emitted uniformly from the second surface 33B. The light emitted from the second surface 33 </ b> B is incident on the wavelength conversion unit 34. All of the light incident on the wavelength conversion unit 34 is irradiated on the phosphor of the wavelength conversion unit 34 to be converted into yellow light, but passes through the wavelength conversion unit 34 while being appropriately scattered. As a result, blue laser light and yellow fluorescence are mixed to obtain light having a desired color temperature.

  As described above, in this embodiment, in addition to the first laser beam transmitted through the dichroic mirror unit 31A, the second laser beam reflected by the dichroic mirror unit 31A is incident on the first light guide unit 30. Therefore, the light-emitting device 7 with high illuminance, the illumination lamp 1, and the illumination device 600 can be obtained.

  Further, in this embodiment, the wavelength converter 34 includes a first phosphor having an excitation spectrum B and a fluorescence spectrum C, and a second phosphor having an excitation spectrum E and a fluorescence spectrum F. In addition, the wavelength conversion unit 34 receives the blue laser light having the wavelength A emitted from the first light source unit 11 and the blue laser light having the wavelength D emitted from the second light source unit 12. As a result, in this embodiment, the laser light emitted from the first light source unit 11, the laser light emitted from the second light source unit 12, the fluorescence emitted by the first phosphor, and the fluorescence emitted by the second phosphor. Can be combined to obtain light having a desired color temperature.

  Furthermore, in this embodiment, the first optical unit 21 and the second optical unit 22 are arranged in parallel. The first light source unit 11 is arranged to propagate light to the first light guide 30 of the first optical unit 21, and the second light source unit 12 is the second light guide of the second optical unit 22. It arrange | positions so that light may be propagated to the part 220. FIG. For this reason, in this embodiment, the light-emitting device 7 with high illuminance that can be applied is obtained in the cover 4 having a limited installation space.

[Lighting lamp modification 1]
FIG. 9 is a first modification of the block diagram shown in FIG. In the modification shown in FIG. 9, the AC voltage input from the AC power source is supplied to the AC-DC conversion unit 114 </ b> A and the AC-DC conversion unit via the power supply terminal 51 of the base 5 of the illumination lamp 1 attached to the socket 100. It is input to 124A. The AC-DC conversion unit 114 </ b> A and the AC-DC conversion unit 124 </ b> A of the illumination lamp 1 are, for example, electric circuits that perform AC-DC conversion, and output DC power that drives the laser light source 111 and the laser light source 121. Thus, in this modification 1, since it is the structure by which the AC-DC conversion part 114A and the AC-DC conversion part 124A are arrange | positioned at the illumination lamp 1, the AC-DC conversion part of the instrument main body 140 shown in FIG. 130 can be omitted. That is, the workability of the instrument body 140 can be improved.

[Modification 1 of Lighting Device]
FIG. 10 shows a first modification of the lighting device 600 shown in FIG. 11 is a schematic cross-sectional view schematically showing an EE cross section of the portion of the illumination lamp 1A of the illumination device 600A shown in FIG. In the example shown in FIG. 1, the example in which the detachable straight tube type illumination lamp 1 is attached to the luminaire 500 has been described. However, the illumination lamp 1A of the first modification is integrally formed with the luminaire 500A. It is a direct attachment type. The cover 4A of the illumination lamp 1 is formed with a gentle curved surface on the light emission side. The cross-sectional shape of the cover 4A is formed in a substantially bowl shape. Inside the cover 4A, the light source unit 10, the optical unit 20, the heat radiating unit 6, and the like are accommodated. The shapes of the illumination device and the illumination lamp are not limited to the above shapes, and can be selected as appropriate.

Embodiment 2. FIG.
The second embodiment is different from the first embodiment only in the arrangement of the laser light source package 110, the laser light source package 120, and the DC-DC converter 114. In the following description, the description overlapping with the first embodiment will be omitted.

  FIG. 12 is a schematic cross-sectional view schematically showing a cross-section (CC cross-section in FIG. 4) of the illumination lamp 1B according to this embodiment. FIG. 13 is a block diagram of the illumination lamp 1B described in FIG.

  As shown in FIG. 12, in this embodiment, the laser light source package 110 attached to the base 5 on one end side and the laser light source package 120 attached to the base 5 on the other end are arranged so as to shift the optical axis. Has been. That is, the laser light source package 110 and the laser light source package 120 are arranged so that the optical axis of the laser light source package 120 is arranged between the optical axes of the adjacent laser light source packages 110. Therefore, in this embodiment, for example, it is possible to obtain emitted light with high uniformity while reducing the number of laser light source packages 110. Alternatively, it is possible to obtain emitted light with high uniformity by arranging the gaps between adjacent laser light source packages 110 to be narrow.

  In this embodiment, the DC-DC converter 124 is installed only on the base 5 side on one end side. In this embodiment, as shown in FIG. 13, the laser light source 111 attached to the base 5 on one end side and the laser light source 121 attached to the base 5 on the other end are driven from one DC-DC converter 124. A laser beam is emitted upon receiving power. With this configuration, the number of DC-DC converters 124 can be reduced, and the number of assembly steps can be reduced, so that the material cost and manufacturing cost of the illumination lamp can be reduced.

Embodiment 3 FIG.
In the first embodiment, the first optical unit 21 and the second optical unit 22 are flat, but the first optical unit 21A and the second optical unit 22A according to this embodiment have a bent shape. is there. In the following description, the description overlapping with the first embodiment will be omitted.

  FIG. 14 is a schematic cross-sectional view schematically showing a cross section (DD cross section of FIG. 5) of the illumination lamp 1 according to this embodiment. In this embodiment, the first optical unit 21A and the second optical unit 22A are formed to have curved surfaces. That is, in the first optical unit 21A and the second optical unit 22A according to this embodiment, the central portion in the short direction of the first optical unit 21A and the second optical unit 22A is the light emitting direction of the first optical unit 21A. And has a shape curved so as to protrude.

  Since the first optical unit 21A and the second optical unit 22A of this embodiment have a curved shape, the first optical unit 21A and the second optical unit 22A can be formed in a large size. In the first optical unit 21A of this embodiment, the emitted light emitted from the curved surface of the first optical unit 21A uniformly irradiates the inner surface 41 of the cover 4, so that the illumination lamp 1 emits uniform light. Can be irradiated.

Embodiment 4 FIG.
In the first embodiment, the mirror unit 222 and the dichroic mirror unit 31A are arranged only on one end side (the right side in FIG. 3) in the longitudinal direction (arrow Y direction) of the illumination lamp 1. In contrast, in this embodiment, the mirror part 222 and the dichroic mirror part 31A are arranged on both sides along the longitudinal direction of the illumination lamp 1. In the following description, the description overlapping with the first embodiment will be omitted.

  FIG. 15 is a schematic cross-sectional view schematically showing a cross section of a light emitting device 7A according to Embodiment 4 of the present invention. The first optical unit 21 according to this embodiment has dichroic mirror portions 31A on both sides along the longitudinal direction thereof. The first light source unit 11 is disposed on both sides along the longitudinal direction of the first optical unit 21 and makes light incident on the dichroic mirror unit 31A.

  The laser beam emitted from the second light source unit 12 and reflected by the mirror unit 222 of the second optical unit 22 is incident on the dichroic mirror unit 31A on one end side (right side in FIG. 15). The laser beam emitted from the second light source unit 12 and reflected by the mirror unit 222A of the third optical unit 22B is incident on the dichroic mirror unit 31A on the other end side (left side in FIG. 15).

  The second optical unit 22 and the third optical unit 22B are disposed on the first surface 33A side of the first optical unit 21. A gap is formed between the second optical unit 22 and the third optical unit 22B, and the second light source unit 12 is installed there. In addition, the 2nd light source unit 12 is connected to the circuit pattern formed in the main surface 62 of the thermal radiation unit 6, for example, and can receive electric power through a circuit pattern.

  The laser light incident on the second optical unit 22 propagates to the other end side, is reflected by the mirror unit 222, and enters the dichroic mirror unit 31A on the other end side of the first optical unit 21. . The laser beam incident on the third optical unit 22B is propagated to one end side, reflected by the mirror unit 222A, and incident on the dichroic mirror unit 31A on the one end side of the first optical unit 21. .

  As described above, in the light emitting device 7A according to this embodiment, the dichroic mirror portions 31A are disposed on both sides along the longitudinal direction of the first light guide portion 30, and the longitudinal direction of the first light guide portion 30 is provided. Light enters from both sides along the line. As a result, according to this embodiment, a light-emitting device 7A with high illuminance can be obtained.

  The present invention is not limited to the above-described embodiment, and various modifications can be made within the scope of the present invention. That is, the configuration of the above embodiment may be improved as appropriate, or at least a part of the configuration may be replaced with another configuration. Further, the configuration requirements that are not particularly limited with respect to the arrangement are not limited to the arrangement disclosed in the embodiment, and can be arranged at a position where the function can be achieved.

  For example, in the above description of the embodiment, an explanation has been given of an illumination lamp elongated in the longitudinal direction. However, the illumination lamp of the present invention is an illumination lamp of another shape such as a square or a circle. Also good. For example, in the case of a square or circular illumination lamp, a light source unit may be disposed on the entire surface in the circumferential direction, and light may be incident from the entire surface in the circumferential direction.

  Further, at least one of the laser light source packages may be installed so that the laser light is incident on the incident end portion of the light guide unit at different angles. For example, adjacent laser light source packages may be installed so that laser light is incident on the incident end of the light guide at different angles. Thus, by installing the laser light source package, the optical unit can emit uniform light.

  In the above description, the wavelength conversion unit includes a yellow phosphor and emits yellow fluorescence. However, the present invention is not limited to this. For example, the wavelength conversion unit includes a green phosphor and a red phosphor, and emits yellow fluorescence in which green fluorescence and red fluorescence are mixed. Or a wavelength conversion part emits yellow fluorescence combining the fluorescence of a some wavelength.

  In the above description, the configuration in which white light is obtained by combining blue laser light and yellow fluorescence has been described. However, a desired combination of laser light and wavelength-converted light emitted from the wavelength conversion unit is desired. You can get the light of the color.

  DESCRIPTION OF SYMBOLS 1 Illumination lamp, 1A illumination lamp, 1B illumination lamp, 4 cover, 4A cover, 5 base, 6 Heat radiation unit, 7 Light emission device, 7A Light emission device, 8 Screw, 9 Adhesive member, 10 Light source unit, 11 1st light source unit, 12 2nd light source unit, 20 Optical unit, 21 1st optical unit, 21A 1st optical unit, 22 2nd optical unit, 22A 2nd optical unit, 22B 3rd optical unit, 30 1st light guide part, 31 Incident end Part, 31A dichroic mirror part, 32 reflection part, 33A first surface, 33B second surface, 34 wavelength conversion part, 40 outer surface, 41 inner surface, 43 support part, 46 main surface, 50 base housing, 51 power supply terminal, 52 Screw mounting part, 60 Screw mounting part, 61 Fin, 62 Main surface, 100 socket, 110 Laser light source package 110A holder, 110B lead terminal, 111 laser light source, 112 condenser lens, 113 substrate, 114 DC-DC converter, 114A AC-DC converter, 115 reflector, 120 laser light source package, 120A holder, 120B lead Terminal, 121 Laser light source, 122 Condensing lens, 123 Substrate, 124 DC-DC converter, 124A AC-DC converter, 130 AC-DC converter, 140 Instrument body, 220 Second light guide, 220A First surface 220B 2nd surface, 221 incident end, 222 mirror unit, 222A mirror unit, 500 lighting fixture, 500A lighting fixture, 600 lighting device, 600A lighting device, A first light source unit wavelength, B excitation spectrum, C fluorescence spectrum, D Second light source unit wavelength, E excitation spectrum Le, F fluorescence spectrum.

Claims (11)

A first laser light source that emits a first laser light;
A second laser light source that emits a second laser light having a wavelength different from that of the first laser light;
A multiplexing unit for combining the first laser light emitted from the first laser light source and the second laser light emitted from the second laser light source;
The first laser light and the second laser light that are combined by the combining unit are incident, and the first laser light and the second laser light are transmitted between a first surface and a second surface that face each other. A first light guide that propagates;
A light emitting device, comprising: a reflection portion provided on the first surface side, and a reflection portion configured to reflect the first laser light and the second laser light on the second surface side.   The light emitting device according to claim 1, wherein the multiplexing unit is a dichroic mirror unit. A second light guide unit that receives the second laser light emitted from the second laser light source and propagates the second laser light;
The light emitting device according to claim 2, further comprising: a mirror unit configured to reflect the second laser light propagating through the second light guide unit toward the dichroic mirror unit.   4. The light emitting device according to claim 3, wherein the second light guide unit is disposed in parallel with the first light guide unit on the first surface side of the first light guide unit. The dichroic mirror portion is disposed such that the second light guide portion side protrudes toward the first laser light source side and is inclined.
5. The light emitting device according to claim 3, wherein the mirror portion is disposed such that the first light guide portion side protrudes and inclines toward the first laser light source side.   The wavelength conversion part which is provided in the said 2nd surface side, and converts the wavelength of the 1st laser beam and the 2nd laser beam which entered from the said reflection part side is further included. The light emitting device according to any one of the above.   The light emission according to claim 6, wherein the wavelength converting unit is a fluorescent unit including a first phosphor and a second phosphor having an excitation spectrum and a fluorescence spectrum different from those of the first phosphor. apparatus. An illumination lamp comprising the light emitting device according to claim 6 or 7,
An illumination lamp comprising a cover that transmits light converted by the wavelength conversion unit.   The illumination lamp according to claim 8, wherein the cover is formed in a cylindrical shape.   The illumination lamp according to claim 8 or 9, wherein the illumination lamp is a straight tube illumination lamp having a long shape and a cylindrical shape.   An illumination device comprising the illumination lamp according to any one of claims 8 to 10.

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