Light emitting module

Abstract

To realize a light emitting module which can be easily handled.SOLUTION: A light emitting module comprises: a first light emitting unit including a first light emitting device having a plurality of first light emitting portions each of which includes a light emitting surface and where light from a plurality of first light emitting elements is emitted, a heat dissipation surface provided opposite to the light emitting surfaces, and a connection portion being positioned between the light emitting surfaces and the heat dissipation surface and including a wiring mounting surface with which the light emitting elements are electrically connected, the first light emitting unit configured to emit first light. The light emitting module further includes: a first optical member that reflects the first light; a housing having a base member where the first light emitting unit and the first optical member are disposed and a lid member surrounding the light emitting device surrounding the first light emitting unit and the first optical member that are disposed on the base member; and a heat sink being connected to the heat dissipation surface and including a mounting surface where the first light emitting device is mounted. The wiring mounting surface extends to an area higher than the first upper surface of the housing, and a portion of the wiring mounting surface is exposed to the outside of the housing.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to a light emitting module. [Background technology]

[0002] Patent Document 1 discloses a light source device that includes a light source unit having a plurality of light sources that emit light of different colors or wavelengths, and emits a composite light obtained by combining the light from the light source unit. The light source unit of Patent Document 1 also includes a plurality of optical components such as lenses and mirrors, and a photodetector. As exemplified by the light source unit of Patent Document 1, a light emitting module that has a light emitting element and an optical control component that controls the light from the light emitting element and emits a desired light is already known. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2017-183690 Summary of the Invention [Problem to be solved by the invention]

[0004] The present disclosure aims to realize a light-emitting module that is easy to handle. [Means for solving the problem]

[0005] The light-emitting module disclosed in the embodiment comprises a first light-emitting device having a plurality of first light-emitting sections, each having a light emission surface, through which light from a plurality of first light-emitting elements is emitted, a heat dissipation surface provided on the opposite side of the light emission surface, and a connection portion located between the light emission surface and the heat dissipation surface and having a wiring mounting surface to which the plurality of first light-emitting elements are electrically connected; and the light-emitting module comprises a housing having a first light-emitting unit that emits first light, a first optical member that reflects the first light, a base on which the first light-emitting unit and the first optical member are arranged, and a lid portion that surrounds the light-emitting device and surrounds the first light-emitting unit and the first optical member arranged on the base; and a heat sink connected to the heat dissipation surface and having a mounting surface on which the first light-emitting device is mounted, and the wiring mounting surface extends above a first top surface of the housing and is partially exposed to the outside of the housing. Effect of the Invention

[0006] According to the present disclosure, an easy-to-use light-emitting module can be realized. [Brief description of the drawings]

[0007] [Figure 1] FIG. 1 is a perspective view of a light-emitting module according to the first embodiment. [Diagram 2] FIG. 2 is a top view of the light emitting module according to the first embodiment. [Diagram 3] FIG. 3 is a perspective view of a housing in the light-emitting module according to the first embodiment, seen from a certain direction. [Figure 4] FIG. 4 is a perspective view of the housing of the light emitting module according to the first embodiment, seen from a different direction than that of FIG. [Diagram 5] FIG. 5 is a perspective view of the light-emitting module according to the first embodiment with a lid of the housing removed. [Figure 6] FIG. 6 is a schematic diagram showing the arrangement of light emitting devices in the light emitting module according to the first embodiment. [Figure 7] FIG. 7 is a top view of the light-emitting module according to the first embodiment with the lid of the housing removed. [Figure 8]FIG. 8 is a top view for explaining the optical path of light in the light emitting module according to the first embodiment. [Figure 9] FIG. 9 is a side view for explaining the arrangement of the wavelength conversion member and the protection member in the light emitting module according to the first embodiment. [Figure 10] FIG. 10 is a cross-sectional view of the light-emitting module taken along the line XX in FIG. [Figure 11] FIG. 11 is an enlarged view of the dashed line portion in the cross-sectional view of FIG. [Figure 12] FIG. 12 is a perspective view of a light guiding unit in the light emitting module according to the first embodiment. [Figure 13] FIG. 13 is a perspective view of the light emitting module according to the second embodiment. [Figure 14] FIG. 14 is a cross-sectional view for explaining the structures of the light detection member and the window portion in the light emitting module according to the second embodiment. [Figure 15] FIG. 15 is a perspective view of the light-emitting module according to the third embodiment. [Figure 16] FIG. 16 is a top view of the light emitting module according to the third embodiment. [Figure 17] FIG. 17 is a cross-sectional view of the light-emitting module taken along the line XVII-XVII in FIG. [Figure 18] FIG. 18 is an enlarged view of the dashed line portion in the cross-sectional view of FIG. [Figure 19] FIG. 19 is an enlarged view of a portion corresponding to FIG. 18 in a state in which the light-emitting module according to the third embodiment includes a light-detecting member. [Figure 20] FIG. 20 is a perspective view of the light-emitting module according to the fourth embodiment. [Figure 21] FIG. 21 is a top view of the light emitting module according to the fourth embodiment. [Figure 22] FIG. 22 is a side view of the light emitting module according to the fourth embodiment. [Figure 23] FIG. 23 is a perspective view of the light-emitting module according to the fifth embodiment. [Figure 24]FIG. 24 is a top view of the light emitting module according to the fifth embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] In this specification and claims, polygons such as triangles and quadrangles are referred to as polygons, including shapes in which the corners of the polygons have been processed by rounding, chamfering, removing corners, rounding, etc. Furthermore, shapes in which processing has been applied not only to the corners (edges of the sides) but also to the middle parts of the sides are also referred to as polygons. In other words, shapes in which partial processing has been applied while leaving the polygon as the base are included in the interpretation of "polygon" described in this specification and claims.

[0009] This is not limited to polygons, but also applies to words expressing specific shapes such as trapezoids, circles, and irregular shapes. The same is true when dealing with each side that forms the shape. In other words, even if the corners or middle part of a side have been processed, the interpretation of "side" includes the processed part. Note that when distinguishing a "polygon" or "side" that has no processing from a processed shape, the word "strict" is added, for example, "strict quadrangle."

[0010] In addition, in this specification or claims, expressions such as up and down, left and right, front and back, front and back, front and back, front and back, and the like merely describe the relationship of relative position, orientation, direction, etc., and do not have to match the relationship in use. For example, even if a part and a finished product are mounted so that the top surface of the part is located on the side of the finished product, the top surface of the part does not change.

[0011] In addition, in this specification or claims, when there are multiple equivalents to a certain component and each is to be expressed separately, the component may be distinguished by adding "first" or "second" to the beginning of the component. In addition, when the objects or viewpoints distinguished between this specification and the claims are different, the same addition may not refer to the same object between this specification and the claims.

[0012] For example, if there is an object in this specification that is distinguished by the notation "first," "second," and "third," and the claims are written with only the "first" and "third" in this specification as the object, the object may be distinguished by the notation "first" and "second" in the claims from the viewpoint of readability. In this case, the object marked with "first" and "second" in the claims refers to the object marked with "first" and "third" in this specification.

[0013] Hereinafter, the embodiments for carrying out the present invention will be described with reference to the drawings. However, although the embodiments shown embody the technical ideas of the present invention, they do not limit the present invention. In the following description, the same names and symbols indicate the same or similar components, and duplicated descriptions may be omitted as appropriate. Note that the sizes and positional relationships of the components shown in each drawing may be exaggerated for ease of understanding.

[0014] First Embodiment A light emitting module 1 according to a first embodiment will be described. FIGS. 1 to 12 are drawings for explaining an exemplary embodiment of the light emitting module 1. FIG. 1 is a perspective view of the light emitting module 1. FIG. 2 is a top view of the light emitting module 1. FIGS. 3 and 4 are perspective views of the housing 10 in the light emitting module 1. FIG. 5 is a perspective view of the light emitting module 1 with the cover portion 12 of the housing 10 removed. FIG. 6 is a schematic view showing the arrangement of the light emitting device 21 in the light emitting module 1. FIG. 7 is a top view of the light emitting module 1 with the cover portion 12 of the housing 10 removed. FIG. 8 is a top view for explaining the optical path in the light emitting module 1. FIG. 9 is a side view for explaining the arrangement of the wavelength conversion member 26 and the protection member 27 in the light emitting module 1. FIG. 10 is a cross-sectional view taken along the XX cross-sectional line in FIG. 2. FIG. 11 is an enlarged view of a portion of the window portion 13 surrounded by a dashed line in the cross-sectional view of FIG. 10. FIG. 12 is a perspective view of a light guiding portion 141 constituting the window portion 13 in the light emitting module 1.

[0015] In FIG. 3, the light guides 141 of the three windows 13 of the housing 10 are omitted. In the perspective view of FIG. 5, the light-transmitting member 140 of the window 13 of the cover 12 is not omitted. In the top view of FIG. 7, the parts constituting the light-emitting unit 20 are surrounded by a dashed frame and hatched. In FIG. 8, the optical path of light is shown by a dotted line, and the light-transmitting member 140 and the three light-guiding members 141 are shown for convenience. In FIG. 8, the protective region formed by the protective member 27 for protecting the wiring is shown by hatching. In FIG. 9, the wavelength conversion member 26 and the protective member 27 arranged on the base 11 are shown in a side view from the light-emitting device 21 side in the light-emitting unit 20, and other components are omitted.

[0016] The light-emitting module 1 has a number of components including a housing 10, one or more light-emitting units 20, one or more optical members 30, and a heat sink 40. For example, the illustrated light-emitting module 1 has a number of light-emitting units 20 and a number of optical members 30. Specifically, the illustrated light-emitting module 1 has three light-emitting units 20 and three optical members 30.

[0017] The light-emitting module 1 controls light emitted from one or more light-emitting units 20 and emits it to the outside. The one or more light-emitting units 20 are disposed inside a housing 10. The light emitted from the one or more light-emitting units 20 is emitted to the outside from a predetermined location of the housing 10.

[0018] Moreover, the one or more optical members 30 are disposed inside the housing 10. The one or more optical members 30 control the light emitted from the one or more light-emitting units 20. Moreover, the heat generated from the one or more light-emitting units 20 is dissipated by the heat sink 40.

[0019] First, each component will be described. (Chassis 10) The housing 10 has an upper surface, a lower surface, and a plurality of side surfaces. The housing 10 may also have a plurality of upper surfaces. In the illustrated example of the light-emitting module 1, the housing 10 has three upper surfaces and three side surfaces.

[0020] The housing 10 has an arrangement area 110 in which one or more components are arranged. The arrangement area 110 is composed of one plane. The arrangement area 110 may be composed of multiple planes. For example, the arrangement area 110 may have a stepped structure, with components arranged on each of the upper and lower planes.

[0021] The multiple side surfaces of the housing 10 intersect with a plane having the placement area 110 and extend upward from this plane. The multiple side surfaces include two opposing side surfaces (two first side surfaces). The two first side surfaces face each other with the placement surface therebetween. The multiple side surfaces also include a side surface (second side surface) connecting the two first side surfaces. The second side surface may connect the two first side surfaces via one or more other side surfaces.

[0022] The multiple side surfaces of the housing 10 do not surround the entire periphery of the placement area 110. Furthermore, the portions of the housing 10 where no side surfaces are provided are openings (see FIG. 4). The openings in the housing 10 are provided between the upper and lower surfaces and between the two first side surfaces. The multiple side surfaces may surround the entire periphery of the placement area 110.

[0023] In the illustrated example of the light-emitting module 1, the housing 10 has two first side surfaces facing each other with the placement area 110 therebetween, and one second side surface intersecting with the two first side surfaces. In addition, in each of the two first side surfaces, the side opposite to the side intersecting with the second side surface forms part of the outer edge of the opening.

[0024] The side surface that intersects with the plane having the arrangement area 110 intersects with top surface 121 (first top surface) on the opposite side to the side where the side intersects with the plane having the arrangement area 110. In the illustrated example of the light-emitting module 1, the housing 10 has multiple top surfaces including the first top surface. The multiple top surfaces include top surface 112 (second top surface) that is provided outside the arrangement area 110 with the side surface as a boundary. The multiple top surfaces also include top surface 123 (third top surface) that intersects with the side surface on the opposite side to the side where the plane having the arrangement area 110 intersects and is located lower than the first top surface.

[0025] In the illustrated example of the light-emitting module 1, the first upper surface is provided between the second upper surface and the third upper surface when viewed from above. Furthermore, the housing 10 has an upper surface 114 (fourth upper surface) provided on the opposite side of the second upper surface with respect to the first and third upper surfaces when viewed from above. Therefore, the first upper surface is provided between the second upper surface and the fourth upper surface. Furthermore, the third upper surface is provided between the second upper surface and the fourth upper surface.

[0026] The housing 10 has a window portion 13 including an area through which light passes. The housing 10 also has a plurality of windows 13. Each of the plurality of windows 13 is provided on any of the faces constituting the housing 10. Each of the plurality of windows 13 is provided on any of the plurality of side faces. The window portion 13 may be provided on the first upper face.

[0027] Furthermore, the multiple window portions 13 are provided on multiple surfaces of the housing 10. That is, at least one window portion 13 is provided on a first surface of the housing 10, and at least one window portion 13 is provided on a second surface of the housing 10. The multiple window portions 13 may be provided on three or more different surfaces of the housing 10. The multiple window portions 13 may be provided on one surface of the housing 10.

[0028] Housing 10 has a surface on which two or more of the multiple window portions 13 are provided, and a surface on which only one of the multiple window portions 13 is provided. Note that housing 10 does not necessarily have to have a surface on which two or more window portions 13 are provided.

[0029] In the illustrated example of the light-emitting module 1, the housing 10 has four window portions 13 as the multiple window portions 13. The multiple window portions 13 are provided on one of the two first side surfaces and on the second side surface. The number of side surfaces having window portions 13 is two. Only one window portion 13 is provided on the first side surface. Two or more window portions 13 are provided on the second side surface.

[0030] The multiple window portions 13 have an exit port 14 that serves as an outlet for light. The multiple window portions 13 include two or more window portions 13 each having a different area of ​​the exit port 14. In the example of the light-emitting module 1 shown in the figure, the multiple window portions 13 include two window portions 13 each having a different area of ​​the exit port 14. In addition, the window portion 13 provided on the first side surface has a larger area of ​​the exit port 14 than any of the window portions 13 provided on the second side surface.

[0031] Housing 10 has a surface in which one or more through holes are formed. Housing 10 also has a plurality of surfaces in which at least one through hole is formed. A plurality of through holes are formed in the plurality of surfaces of housing 10. The plurality of through holes correspond to a plurality of window portions 13. That is, the through holes are formed in the surface in which window portion 13 is provided (see FIG. 3). Furthermore, emission port 14 is provided within this through hole. Note that the through hole may be emission port 14.

[0032] A window portion 13 is provided in each of the multiple through holes. The through holes may be the window portions 13 of the housing 10. The window portions 13 are formed, for example, by blocking the through holes with a light-transmitting member 140. The light-transmitting member 140 may be made of, for example, glass having light-transmitting properties. Here, being light-transmitting means having a transmittance of 90% or more for visible light or light in a specific wavelength range (color) of visible light.

[0033] Furthermore, for example, window portion 13 is formed by fitting light guide portion 141 having a light guide path into a through hole. Light guide portion 141 is configured to include, for example, light guide member 142, connection member 143, and filter 144 (see FIG. 7 in particular for light guide portion 141).

[0034] The light guide member 142 has a light guide path through which light passes. The light guide path is, for example, a hollow space. The light entrance surface and the light exit surface of the light guide path are smaller than the through hole. The exit surface of the light guide path becomes the exit port 14 of the window portion 13 or is connected to the exit port 14.

[0035] The connection member 143 holds the light guide member 142 and connects to the surface in which the through hole is formed. For the connection, screws, adhesive, or the like can be used.

[0036] The filter 144 transmits or blocks light in a predetermined wavelength range. By providing the filter 144, the wavelength range of light that can be emitted from the emission port 14 can be restricted.

[0037] Furthermore, a connection hole 15 is formed in the housing 10. The connection hole 15 is formed in the first upper surface. In the illustrated example of the light-emitting module 1, the connection hole 15 is provided at a position close to the third upper surface. Furthermore, in a top view, the distance from the third upper surface to the connection hole 15 is shorter than the distance from the second upper surface to the connection hole 15. Furthermore, the window portion 13 provided in the first side surface is provided at a position close to the second side surface.

[0038] The housing 10 is formed by connecting parts including a base 11 and a lid 12. The base 11 has an arrangement area 110. The base 11 also has a bottom surface. The lid 12 has a number of side surfaces intersecting with the arrangement area 110, and a first top surface. The lid 12 also has a number of windows 13. The lid 12 also has a connection hole 15. In the illustrated example of the light-emitting module 1, the base 11 also has a second top surface. The base 11 also has a fourth top surface. The lid 12 has a third top surface.

[0039] Each surface of the housing 10 can be formed using, for example, a metal such as aluminum as the main material. Each surface of the housing 10, except for the exit port 14 of the window portion 13, is formed of a material having light-shielding properties. Having light-shielding properties means that the transmittance of visible light is within 5.0% or less. Note that materials other than metals may be used as the main material. Also, the light-shielding properties may be imparted by performing a surface treatment.

[0040] (Light Emitting Unit 20) The light-emitting unit 20 is a unit having one or more light-emitting elements and being composed of one or more components including the light-emitting elements. For example, the light-emitting unit 20 can be configured to have a wavelength conversion member 26 in addition to the light-emitting elements. Also, for example, the light-emitting unit 20 can be configured to have an optical member in addition to the light-emitting elements.

[0041] The light-emitting unit 20 is a unit for emitting light in a specific wavelength range. The light in the specific wavelength range is included, for example, in the wavelength range of light emitted from a light-emitting element. Also, for example, it is included in the wavelength range of light converted based on the light from the light-emitting element by a wavelength conversion member and emitted.

[0042] The light in the specific wavelength range includes light of a peak wavelength emitted from the light-emitting unit 20. Furthermore, when light in the specific wavelength range is included in the light emitted from the light-emitting element, the peak wavelength of the light emitted from the light-emitting element is included in the specific wavelength range. When light in the specific wavelength range is converted in a wavelength conversion member and emitted, the peak wavelength of the light converted in the wavelength conversion member and emitted is included in the specific wavelength range.

[0043] The light-emitting unit 20 can also be configured to include an optical member 24. The optical member 24 is, for example, a condenser lens. The light-emitting unit 20 can also be configured to include an optical member 28. The optical member 28 is, for example, a collimator lens. The light-emitting unit 20 can also be configured to include an optical member 25. The optical member 25 is, for example, a diffusion plate.

[0044] The light-emitting unit 20 can be configured to have a plurality of optical members. The plurality of optical members includes the optical member 24, the optical member 28, and the optical member 25. The light-emitting unit 20 may have optical members other than these. Furthermore, the light-emitting unit 20 may not have some or all of these optical members.

[0045] For example, the light-emitting unit 20 can be configured to include a plurality of light-emitting elements, a condenser lens (optical member 24) that condenses the light emitted from the plurality of light-emitting elements, a diffusion plate (optical member 25) that diffuses the condensed light, and a collimator lens (optical member 28) that collimates the diffused light. With this configuration, the light-emitting unit 20 can emit collimated light obtained by condensing the light emitted from the plurality of light-emitting elements.

[0046] Furthermore, for example, the light-emitting unit 20 can be configured to include a plurality of light-emitting elements, a condensing lens (optical member 24) that condenses the light emitted from the plurality of light-emitting elements, a wavelength conversion member 26 into which the condensed light is incident, and a collimating lens (optical member 28) that collimates the light emitted by the wavelength conversion member 26. With such a configuration, the light-emitting unit 20 can emit collimated light of the light emitted by the wavelength conversion member 26.

[0047] The light-emitting unit 20 can be configured to have one or more light-emitting devices 21 on which multiple light-emitting elements are mounted. The light-emitting device 21 has one or more light-emitting sections 22 that emit light from the multiple light-emitting elements to the outside. The light-emitting device 21 also has a connection section 23 that electrically connects to the multiple light-emitting elements.

[0048] The light-emitting section 22 has a light exit surface that emits light. The light exit surfaces of one or more light-emitting sections 22 are mounted facing the same direction. The light-emitting device 21 has a first mounting surface on which one or more light-emitting sections 22 are mounted, and a second mounting surface opposite the first mounting surface. The first mounting surface is a surface facing the same direction as the light exit surface of the light-emitting section 22. The second mounting surface is a surface facing the opposite direction to the light exit surface of the light-emitting section 22. The second mounting surface is a surface provided on the opposite side to the light exit surface of the light-emitting section 22.

[0049] The connection portion 23 has a first surface on which a wiring area for wiring is provided, and a second surface opposite to the first surface. The first surface of the connection portion 23 is located between the light emission surface and the second mounting surface. The first surface of the connection portion 23 is also located between the first mounting surface and the second mounting surface.

[0050] In the illustrated example of the light-emitting module 1, the light-emitting unit 20 has a plurality of light-emitting devices 21. Furthermore, each light-emitting device 21 has a plurality of light-emitting sections 22. Furthermore, the plurality of light-emitting sections 22 are arranged in a matrix. In one light-emitting unit 20, two light-emitting devices 21, each having four rows and two columns of light-emitting sections 22, are arranged side by side, and the light-emitting sections 22 are arranged in four rows and four columns.

[0051] A semiconductor laser element is used as the light-emitting element. Also, LED, organic EL, etc. may be used. For example, the light-emitting element may use light whose emission peak wavelength is within the range of 365 nm to 494 nm. Note that light having a peak wavelength outside this range may also be used. Also, it is not limited to the wavelength range of visible light. For example, light having a peak wavelength in the wavelength range of ultraviolet light may be used.

[0052] For example, the plurality of light-emitting elements may include a light-emitting element that emits blue light, or a light-emitting element that emits purple light, or may be a light-emitting element that emits light of a color other than these.

[0053] All the light-emitting elements included in one light-emitting unit 20 emit light of the same color. When the light-emitting module 1 includes a plurality of light-emitting units 20, the plurality of light-emitting units 20 may include two or more light-emitting units 20 that emit light of different colors.

[0054] The blue light here refers to light whose emission peak wavelength is in the range of 430 nm to 494 nm. The purple light refers to light whose emission peak wavelength is in the range of 365 nm to 430 nm. A light emitting element that emits blue or purple light includes a semiconductor laser element containing a nitride semiconductor. Examples of the nitride semiconductor that can be used include GaN, InGaN, and AlGaN.

[0055] The wavelength conversion member 26 emits light of a different wavelength based on a part or all of the light of a predetermined wavelength that is incident on the wavelength conversion member 26. In other words, only a part or all of the light of a predetermined wavelength that is incident on the wavelength conversion member 26 is emitted from the wavelength conversion member 26. Furthermore, when light of a predetermined wavelength is incident on the wavelength conversion member 26, the wavelength conversion member 26 emits light of a wavelength different from the wavelength of the incident light.

[0056] The wavelength conversion member 26 has, for example, a phosphor. For the phosphor, for example, a garnet-based phosphor such as YAG or LAG can be used. Other phosphors can also be used.

[0057] Moreover, the wavelength conversion member 26 can be configured to include a wavelength conversion section 261 and a conversion control section 262. The wavelength conversion section 261 emits light converted into a different wavelength. The conversion control section 262 controls the operation of the wavelength conversion section 261 or the wavelength conversion effect by the wavelength conversion section 261. The wavelength conversion section 261 is connected to the conversion control section 262.

[0058] The wavelength conversion unit 261 has, for example, a phosphor. For example, a phosphor wheel or a phosphor plate can be used for the wavelength conversion unit 261. For example, a motor that controls the rotation of the phosphor wheel, a shutter that controls the incidence of light on the phosphor plate, etc. can be used for the conversion control unit 262. By using the phosphor wheel while rotating it, heat generation of the phosphor due to irradiation with light can be dispersed, and deterioration can be reduced.

[0059] The conversion control unit 262 operates when power is supplied. Therefore, it has a connection unit for electrically connecting to an external power source. In the example of the light-emitting module 1 shown in the figure, a phosphor wheel is used as the wavelength conversion unit 261, and a motor for rotating the wheel is used as the conversion control unit 262.

[0060] The light-emitting unit 20 can also be configured to include a protective member 27. The protective member 27 is disposed in the vicinity of the wavelength conversion member 26. The protective member 27 also has a connection portion 271 that connects to the wavelength conversion member 26. The protective member 27 is also connected to the conversion control unit 262. The protective member 27 is connected to the conversion control unit 262 on a surface opposite to a surface of the conversion control unit 262 to which the wavelength conversion unit 261 is connected.

[0061] The protective member 27 is disposed in a position near the wavelength conversion unit 261 but not in contact with the wavelength conversion unit 261. The protective member 27 has a protective portion 272 extending in a direction toward the wavelength conversion unit 261 from a position connected to the conversion control unit 262. The protective portion 272 has a structure in which a flat plate is bent at its midpoint. The tip of the protective portion 272 is disposed in a position closest to the wavelength conversion unit 261.

[0062] By providing the protective member 27, the light proceeding to the wavelength conversion unit 261 is not hindered by the wiring connected to the connection part of the conversion control unit 262, and the light incident on the wavelength conversion unit 261 can be protected from the wiring. Examples of wiring hindering wavelength conversion include contact of the wiring with the wavelength conversion unit 261 and placement of the wiring on the optical path of the light.

[0063] (Optical member 30) The optical member 30 has high reflectance for light in a predetermined wavelength range. Here, high reflectance means, for example, a reflectance of 95% or more. In other words, it can be said that the optical member 30 has a transmittance of less than 5% for light in the predetermined wavelength range.

[0064] In addition, the optical member 30 has a high transmittance for light in a wavelength range different from the wavelength range in which the optical member 30 has a high reflectance. The high transmittance here means, for example, a transmittance of 90% or more. The optical member 30 is, for example, a dichroic mirror.

[0065] (Heat sink 40) The heat sink 40 has an upper surface, a lower surface, and side surfaces. The heat sink 40 also has a mounting surface on which a heat source is mounted. Any one of the upper surface, the lower surface, or the side surface can be the mounting surface. The heat sink 40 dissipates heat generated from a heat source mounted on the mounting surface to the outside of the light-emitting module.

[0066] The heat sink 40 may further have one or more side surfaces. In the illustrated example of the light-emitting module 1, the heat sink 40 has a rectangular parallelepiped outer shape.

[0067] (Light Emitting Module 1) Next, the light emitting module 1 will be described. One or more light emitting units 20 are arranged in the arrangement area 110 of the housing 10. One or more optical members 30 are arranged in the arrangement area 110 of the housing 10. A heat sink 40 is arranged near an opening formed in a part of the housing 10. Alternatively, the heat sink 40 may be arranged near the opening while blocking the opening.

[0068] In the illustrated example of the light-emitting module 1, a plurality of light-emitting units 20 are arranged in an arrangement region 110 in the base 11 of the housing 10. A plurality of optical members 30 are arranged in the arrangement region 110 in the base 11 of the housing 10. A heat sink 40 is arranged on a fourth upper surface of the base 11 of the housing 10. Moreover, the lid 12 of the housing 10 and the heat sink 40 are arranged side by side in a top view. A side surface of the heat sink 40 is provided near the opening of the housing 10.

[0069] The housing 10 surrounds one or more light-emitting units 20. The housing 10 also surrounds one or more optical members 30. The upper surface of the housing 10 is provided directly above the one or more light-emitting units 20. The upper surface of the housing 10 is provided directly above the one or more optical members 30. Note that a portion of the one or more light-emitting units 20 may be exposed from the opening. In other words, the upper surface of the housing 10 may not be provided directly above this portion.

[0070] The one or more light emitting units 20 are surrounded by the bottom surface and the multiple side surfaces of the housing 10. The one or more light emitting units 20 are also disposed between the top surface and bottom surface of the housing 10, between the two first side surfaces of the housing 10, and between the second side surface of the housing 10 and a side surface of the heat sink 40. With regard to this paragraph, the same holds true even if "one or more light emitting units 20" is replaced with "one or more optical members 30."

[0071] In the illustrated example of the light-emitting module 1, the light-emitting units 20 are arranged side by side from one first side surface to the other first side surface. Also, the optical members 30 are arranged in an arrangement region 110 in the base 11 of the housing 10. Also, the optical members 30 are arranged side by side from one first side surface to the other first side surface.

[0072] One or more light emitting devices 21 included in the light emitting unit 20 are mounted on the mounting surface of the heat sink 40. Therefore, the light emitting device 21 mounted on the mounting surface of the heat sink 40 is disposed in the arrangement region 110 of the housing 10.

[0073] A second mounting surface of the light emitting device 21 is connected to the mounting surface of the heat sink 40. The second mounting surface serves as a heat dissipation surface that dissipates heat generated by the light emitting elements of the light emitting device 21 to the heat sink. The second mounting surface may be directly connected to the mounting surface of the heat sink 40 or may be connected via another member. When using another member, it is preferable to take care not to significantly impair the heat dissipation effect.

[0074] The one or more light emitting elements 21 are mounted so as not to protrude from the mounting surface of the heat sink 40 in a plan view parallel to the mounting surface of the heat sink 40. The outer edge of the second mounting surface of the light emitting element 21 is contained within the outer edge of the mounting surface of the heat sink 40. This can improve the heat dissipation effect.

[0075] In the illustrated example of the light-emitting module 1, a side surface of the heat sink 40 disposed near the opening serves as a mounting surface on which a heat source is mounted. A plurality of light-emitting devices 21 are mounted on the mounting surface of the heat sink 40. All of the plurality of light-emitting devices 21 included in the plurality of light-emitting units 20 are mounted on the mounting surface of the heat sink 40. Each of the light-emitting devices 21 emits light from a plurality of light-emitting portions 22 toward the second side surface of the housing 10.

[0076] The connection portion 23 of one or more light emitting devices 21 included in the light emitting module 1 extends above the third top surface of the housing 10, and a part of the connection portion 23 is exposed to the outside of the housing 10. The connection portion 23 also extends from below to above the third top surface of the housing 10. That is, a part of the connection portion 23 protrudes from the third top surface of the housing 10. By exposing the connection portion 23, it is possible to easily connect the connection portion 23 to external wiring. The external wiring is connected to, for example, a first surface of the connection portion 23. The first surface of the connection portion 23 can be said to be a wiring mounting surface to which the one or more light emitting elements 21 are electrically connected.

[0077] Furthermore, the connection portion 23 is disposed below the first upper surface of the housing 10. In other words, the connection portion 23 does not extend above the first upper surface of the housing 10. The connection portion 23 can be protected by providing a third upper surface in the housing 10 that is lower than the first upper surface and exposing the connection portion 23 between the first upper surface and the third upper surface. For example, even if a flat surface of another module is disposed on the first upper surface of the light-emitting module 1, contact between the other module and the connection portion 23 can be avoided, and an easy-to-handle light-emitting module 1 can be realized.

[0078] Furthermore, the connection portion 23 is disposed below the upper surface of the heat sink 40. In other words, the connection portion 23 does not extend above the upper surface of the heat sink 40. For example, even if a flat surface of the other module is disposed on the first upper surface of the housing 10 and the upper surface of the heat sink 40, contact between the other module and the connection portion 23 can be avoided. Furthermore, the height of the first upper surface of the housing 10 and the height of the upper surface of the heat sink 40 are equal. When a flat surface of the other module is disposed on the first upper surface of the housing 10 and the upper surface of the heat sink 40, the installation of the other module is stable.

[0079] In the illustrated example of the light-emitting module 1, the light-emitting units 20 include a light-emitting unit 20 having a wavelength conversion member 26. In such a light-emitting unit 20, light that has been wavelength-converted by the wavelength conversion member 26 becomes light in a specific wavelength range that is emitted from the light-emitting unit 20. In this case, light from the light-emitting element that is not included in the wavelength range of the light that is wavelength-converted does not become light in the specific wavelength range.

[0080] For example, the illustrated light-emitting module 1 has, as such a light-emitting unit 20, one or more light-emitting elements emitting light having an emission peak wavelength in the range of 430 nm to 494 nm, and a wavelength conversion member 26 having a YAG phosphor. Also, the light-emitting module 1 has one or more light-emitting devices 21 emitting light having an emission peak wavelength in the range of 430 nm to 494 nm, and a wavelength conversion member 26 having a YAG phosphor.

[0081] For example, the illustrated light-emitting module 1 has, as such a light-emitting unit 20, one or more light-emitting elements emitting light having an emission peak wavelength in the range of 430 nm to 494 nm, and a wavelength conversion member 26 having a LAG phosphor. Also, the light-emitting module 1 has a light-emitting unit 20 having one or more light-emitting devices 21 emitting light having an emission peak wavelength in the range of 430 nm to 494 nm, and a wavelength conversion member 26 having a LAG phosphor.

[0082] In the illustrated example of the light-emitting module 1, the light-emitting units 20 include a light-emitting unit 20 that emits only light from one or more light-emitting devices 21. In such a light-emitting unit 20, the light emitted from the one or more light-emitting devices 21 becomes light in a specific wavelength range emitted from the light-emitting unit 20.

[0083] For example, the illustrated light-emitting module 1 has, as such a light-emitting unit 20, a light-emitting unit 20 having one or more light-emitting elements that emit light having an emission peak wavelength in the range of 365 nm to 430 nm. Also, the light-emitting unit 20 has one or more light-emitting devices 21 that emit light having an emission peak wavelength in the range of 365 nm to 430 nm. Note that no component equivalent to the wavelength conversion member 26 is included.

[0084] For example, if a wavelength conversion member such as a phosphor is used in generating the light emitted from the light emitting device 21, this wavelength conversion member is not a component equivalent to the wavelength conversion member 26. In other words, even if the light emitting device 21 has a wavelength conversion member as a component thereof, this does not mean that the light emitting device 21 has a component equivalent to the wavelength conversion member 26.

[0085] Furthermore, when the light-emitting module 1 has a plurality of light-emitting units 20, the peak wavelengths of light in a specific wavelength range emitted by each of the plurality of light-emitting units 20 are different. For example, when the plurality of light-emitting units 20 includes two light-emitting units 20 (a first light-emitting unit 20 and a second light-emitting unit 20), the peak wavelength of the light (first light) emitted from the first light-emitting unit 20 and the peak wavelength of the light (second light) emitted from the second light-emitting unit 20 are different from each other.

[0086] In addition, when the light-emitting module 1 has a plurality of light-emitting units 20, the plurality of light-emitting units 20 may include two or more light-emitting units 20 that emit light of the same peak wavelength. In addition, the plurality of light-emitting units 20 may include two or more light-emitting units 20 that emit light in the same wavelength range. In addition, the plurality of light-emitting units 20 may include two or more light-emitting units 20 that emit light in the same specific wavelength range.

[0087] For example, the illustrated light-emitting module 1 has three light-emitting units 20 each having a different peak wavelength of emitted light. Two light-emitting units 20 share one wavelength conversion member 26. The wavelength conversion member 26 is provided with two wavelength conversion regions that convert light into wavelengths different from each other. Each of the two light-emitting units 20 causes light from the light-emitting device 21 to enter a different wavelength conversion region from each other.

[0088] In the wavelength conversion member 26 shared by the two light-emitting units 20, the wavelength conversion section 261 is provided from the position where the light emitted from the light-emitting device 21 of one of the two light-emitting units 20 is incident to the position where the light emitted from the light-emitting device 21 of the other light-emitting unit 20 is incident.

[0089] In addition, when viewed from above, the conversion control unit 262 and the protective member 27 are arranged between a straight line that passes through the position where light emitted from the light-emitting device 21 of one of the two light-emitting units 20 enters the wavelength conversion unit 261 and proceeds in a direction perpendicular to the light incident surface in the wavelength conversion unit 261 (first direction), and a straight line that passes through the position where light emitted from the light-emitting device 21 of the other light-emitting unit 20 enters the wavelength conversion unit 261 and proceeds in the first direction.

[0090] In the illustrated example of the light-emitting module 1, in the light-emitting unit 20 having the wavelength conversion member 26, light emitted from a plurality of light-emitting sections 22 and collected by a collecting lens (optical member 24) enters the wavelength conversion section 261. The protective member 27 is disposed at a position closer to the conversion control section 262 than the optical path from where the light emitted from the light-emitting section 22 closest to the conversion control section 262 leaves the collecting lens and enters the wavelength conversion section 261. This makes it possible to prevent the protective member 27 from interfering with the optical path.

[0091] In addition, the protective member 27 has a protective portion 272 that, when viewed from above, moves away from the conversion control portion 262 in a direction (second direction) parallel to the light incidence surface in the wavelength conversion portion 261 as the light travels from the focusing lens to the wavelength conversion portion 261.

[0092] In a top view, the angle between the second direction and the protective section 272 is equal to or smaller than the angle between the second direction and the direction in which the light emitted from the light-emitting section 22 closest to the conversion control section 262 travels from the condenser lens to the wavelength conversion section 261. Both angles are acute angles. Such a protective section 272 can prevent the wiring connected to the conversion control section 262 from interfering with the optical path.

[0093] Moreover, the difference between these two angles is preferably 1 degree or more and 25 degrees or less. With such protective portion 272, the distance between the light emitted from light emitting portion 22 and protective portion 272 increases as the light travels from the condenser lens to wavelength conversion portion 261, so that it is possible to avoid interference of light by protective portion 272. Also, it is possible to ensure a sufficient area for protecting the wiring.

[0094] The wiring connected to the conversion control unit 262 is connected to the conversion control unit 262, and is led from there toward the connection hole 15 to the outside of the housing 10. At this time, the wiring leading from the conversion control unit 262 to the connection hole 15 passes through a protective area (hatched area in FIG. 8) provided between the conversion control unit 262 and the protective member 27 in a top view. In addition, the protective member 27 protects the wiring to a sufficient height by the protective portion 272 (see FIG. 9). This allows the wiring to be led to the connection hole 15 without interfering with light. This prevents the wiring from interfering with light, and allows the wavelength conversion member 26 to receive power supply from an external power source.

[0095] In the light emitting unit 20 having a light emitting device 21 having a plurality of light emitting parts 22, a condenser lens (optical member 24), a wavelength conversion member 26, and a collimator lens (optical member 28), the wavelength conversion member 26 is disposed between the condenser lens and the collimator lens. The wavelength conversion member 26 is disposed at a position closer to the collimator lens than the condenser lens. The wavelength conversion member 26 is preferably disposed near the collimator lens. Since the wavelength-converted light is emitted from the wavelength conversion member 26 in a wide angle range, collimated light with a small spot diameter can be obtained by bringing it closer to the collimator lens. As a result, when collimating the same amount of light, the area of ​​the lens surface of the collimator lens can be designed to be small.

[0096] In the arrangement region 110 of the housing 10, one light-emitting unit 20 and one optical member 30 are arranged in correspondence with each other. In the light-emitting module 1, the same number of optical members 30 as the number of light-emitting units 20 or more are arranged. The one or more light-emitting units 20 emit light toward the second side surface. Therefore, each of the one or more optical members 30 is arranged at a position closer to the second side surface than the corresponding light-emitting unit 20.

[0097] Light emitted from one light-emitting unit 20 is incident on one corresponding optical member 30. Also, light in a specific wavelength range emitted from one light-emitting unit 20 is incident on one corresponding optical member 30. Also, in the example of the light-emitting module 1 shown in the figure, light in a specific wavelength range emitted from the light-emitting unit 20 is incident on the corresponding optical member 30 in a collimated state.

[0098] Each optical member 30 reflects light in a specific wavelength range emitted from a corresponding light emitting unit 20 toward the second side surface. The reflected light travels toward one of the two first side surfaces of the housing 10. Moreover, each optical member 30 transmits a portion of the light in the specific wavelength range. The transmitted light travels toward the second side surface of the housing 10.

[0099] The light-emitting module 1 has an optical member 30 that has high reflectance over the entirety of a specific wavelength range for light in that range from a corresponding light-emitting unit 20. In this case, the ratio of reflection to transmission for light in the specific wavelength range is the reflectance and the transmittance.

[0100] When the wavelength range of the spectrum of light emitted from the light-emitting unit 20 is narrow, the reflected light and transmitted light can be generated by the optical member 30 having such characteristics. In the illustrated example of the light-emitting module 1, the optical member 30 having such characteristics is applied to the light-emitting unit 20 that does not have the wavelength conversion member 26, in other words, the optical member 30 corresponding to the light-emitting unit 20 that emits only light from one or more light-emitting devices 21. For example, 98% or more of the light in a specific wavelength range from the light-emitting unit 20 is reflected by the corresponding optical member 30.

[0101] Furthermore, the light-emitting module 1 has an optical member 30 that has high reflectance in a part of a specific wavelength range and high transmittance in another part for light in the specific wavelength range from a corresponding light-emitting unit 20. In this case, the proportion of reflected light and the proportion of transmitted light with respect to the amount of light in the entire specific wavelength range are affected by the proportion of the amount of light in the wavelength range having high reflectance and the amount of light in the wavelength range having high transmittance.

[0102] In this manner, reflected light and transmitted light can be generated when the spectrum of light emitted from the light-emitting unit 20 has a wide wavelength range. In the illustrated example of the light-emitting module 1, the light-emitting unit 20 has a wavelength conversion member 26, in other words, the optical member 30 is applied to the light-emitting unit 20 that emits light whose wavelength has been converted by the wavelength conversion member 26.

[0103] The multiple window sections 13 in the housing 10 of the light-emitting module 1 include two window sections 13 that extract each of the two beams of light traveling in different directions that are formed when the light emitted from the light-emitting unit 20 is split through the optical member 30.

[0104] In the light-emitting module 1, light reflected by one or more optical members 30 is emitted to the outside of the housing 10 from one of the multiple window portions 13 of the housing 10. In the example of the light-emitting module 1 shown in the figure, light reflected by the optical member 30 is emitted from the window portion 13 provided on one of the two first side surfaces of the housing 10.

[0105] Furthermore, in the light-emitting module 1, the light transmitted through one or more optical members 30 is emitted to the outside of the housing 10 from one of the multiple window portions 13 of the housing 10. In the example of the light-emitting module 1 shown in the figure, the light transmitted through the optical member 30 is emitted from the window portion 13 provided on the second side surface of the housing 10.

[0106] When the light-emitting module 1 has multiple light-emitting units 20 and multiple corresponding optical elements 30, the multiple light beams emitted from the multiple light-emitting units 20 travel in a predetermined direction (third direction) through the corresponding optical elements 30 and are emitted to the outside of the housing 10 through one window portion 13 (first window portion) of the housing 10.

[0107] Therefore, the multiple window portions 13 include a first window portion that extracts light (first light and second light) emitted from each of the two light-emitting units 20 (first light-emitting unit and second light-emitting unit). The multiple window portions 13 also include a first window portion that extracts the first light and second light traveling in a predetermined direction via two optical members 30 (first optical member and second optical member) corresponding to the first light-emitting unit and the second light-emitting unit.

[0108] In addition, the multiple light beams emitted from the multiple light-emitting units 20 each travel in a predetermined direction different from the third direction through the corresponding optical members 30, and are each emitted to the outside of the housing 10 from a different window portion 13 of the housing 10.

[0109] Therefore, the multiple window portions 13 include two window portions 13 (second window portions) that are different from the first window portion, one of which extracts the first light and the other of which extracts the second light. The multiple window portions 13 also include two second window portions, one of which extracts the first light traveling in a predetermined direction different from the third direction via a first optical member corresponding to the first light-emitting unit, and the other of which extracts the second light traveling in a predetermined direction different from the third direction via a second optical member corresponding to the second light-emitting unit.

[0110] In the illustrated example of the light-emitting module 1, the light emitted from each of the three light-emitting units 20 is reflected through the corresponding optical member 30 and extracted from the first window portion. Also, the light emitted from each of the three light-emitting units 20 is transmitted through the corresponding optical member 30 and extracted from the different window portions 13.

[0111] The multiple light beams emitted from the multiple light-emitting units 20 and emitted to the outside through the first window are combined into a composite light, which is then emitted from the first window to the outside of the housing 10. The multiple light beams emitted from the multiple light-emitting units 20 are combined into a composite light that passes through the same axis and are extracted from the first window. This allows the combined light emitted from the multiple light-emitting units 20 and the light emitted from one light-emitting unit 20 to be extracted separately from different windows 13.

[0112] In this way, by providing window portion 13 through which each light is emitted in addition to window portion 13 through which the composite light is emitted, it is possible to easily handle the composite light and each light separately outside light-emitting module 1. It becomes possible to easily utilize the light controlled in light-emitting module 1 from outside light-emitting module 1.

[0113] Light in a particular wavelength range from the light-emitting units 20 located farther from the first window is reflected by the corresponding optical members 30 and passes through the optical members 30 corresponding to the light-emitting units 20 located closer to the first window. A composite light can be generated in this manner.

[0114] A first window portion through which the multiple light beams emitted from the multiple light-emitting units 20 are collectively extracted, and two or more second window portions through which the multiple light beams emitted from the multiple light-emitting units 20 are separately extracted are provided on different surfaces of the housing 10.

[0115] In the light-emitting module 1, a first window is provided on a first surface of the housing 10, and two or more second windows are provided on a second surface of the housing 10. In the illustrated example of the light-emitting module 1, the first window is provided on one of the two first side surfaces of the housing 10, and three second windows are provided on the second side surface of the housing 10. By extracting the light from different surfaces, it is possible to suppress interference between the combined light and the light emitted from one light-emitting unit 20.

[0116] The light-emitting module 1 has an optical element 30 having high reflectance over the entire wavelength range of light in a specific wavelength range emitted from a corresponding light-emitting unit 20, and an optical element 30 having high reflectance over a portion of the wavelength range of light in a specific wavelength range emitted from a corresponding one light-emitting unit 20 and having high transmittance over another portion of the wavelength range.

[0117] As a result, even when light-emitting units 20 that emit light in a narrow specific wavelength range and light-emitting units 20 that emit light in a wide specific wavelength range are mixed, optical elements 30 with different characteristics corresponding to the length of the wavelength range can be used to separate the light into reflected light and transmitted light.

[0118] Of the light that enters the second window, light that passes through filter 144 is emitted from outlet 14 to the outside of light-emitting module 1. Filter 144 in the second window passes only light in a specific wavelength range out of the light emitted from light-emitting unit 20 corresponding to that second window. Also, it passes only a portion of the light in the specific wavelength range. In this way, by having filter 144 in the second window, light in a desired wavelength range out of the light emitted from light-emitting unit 20 can be extracted from the second window.

[0119] For example, the light emitted from the light-emitting unit 20 having the wavelength conversion member 26 includes light emitted from the light-emitting device and light whose wavelength has been converted by the wavelength conversion member 26. In this case, the specific wavelength range is the wavelength range of the light whose wavelength has been converted by the wavelength conversion member 26, and if the light emitted from the light-emitting element is not included in this wavelength range, the light emitted from the light-emitting element is not included in the light of the specific wavelength range. Therefore, the light emitted from the light-emitting element does not pass through the filter 144 and is not emitted from the second window portion.

[0120] <Second embodiment> Next, a light-emitting module 2 according to a second embodiment will be described. Figs. 13 and 14 are drawings for explaining an exemplary embodiment of the light-emitting module 2. Fig. 13 is a perspective view of the light-emitting module 2. Fig. 14 is a cross-sectional view for explaining the structures of the light-detecting member 50 and the window portion 13 of the light-emitting module 2. Note that Fig. 14 shows an enlarged area similar to the area surrounded by the dashed line in Fig. 10.

[0121] The second embodiment shows an example of how to utilize light extracted from a plurality of windows 13 in a light-emitting module having a plurality of windows 13. That is, it shows one form of utilizing each light controlled in the light-emitting module 1 outside the light-emitting module 1. The light-emitting module 2 has one or more light detection members 50, and the light detection members 50 detect the light emitted from the one or more windows 13.

[0122] The light-emitting module 2 according to the second embodiment differs from the light-emitting modules according to the previously described embodiments in that it has a light detection member 50. In addition, for the rest, the same configuration as the light-emitting modules according to the previously described embodiments can be adopted.

[0123] (Light detection member 50) The light detection member 50 has a light receiving element 51. The light detection member 50 also has a connection member 52. The light receiving element 51 converts the irradiated light into an electrical signal. The intensity of the converted electrical signal corresponds to the intensity of the irradiated light. The light receiving element 51 can be, for example, a photodiode.

[0124] The connection member 52 fixes the light receiving element 51 at a predetermined position. The connection member 52 has a mounting surface on which the light receiving element 51 is mounted. The light receiving element 51 is mounted on the mounting surface of the connection member 52.

[0125] (Light Emitting Module 2) In the light-emitting module 2, the light detection member 50 is disposed on the opposite side to the light-emitting unit 20, with the surface of the housing 10 on which the window portion 13 is provided as the boundary. Between the light detection member 50 and the light-emitting unit 20 that emits light detected by the light detection member 50, the window portion 13 through which the light passes is provided. In the illustrated example of the light-emitting module 2, the second side surface is disposed between the light detection member 50 and the light-emitting unit 20.

[0126] In other words, the light emitting module 2 according to the second embodiment can be manufactured by attaching the light detection member 50 after manufacturing the light emitting module 1 according to the first embodiment. Note that the part to be attached later does not have to be limited to the light detection member 50.

[0127] Furthermore, for example, when the light emitted to the outside of the housing 10 through the window 13 is not utilized, the light can be blocked by a light blocking plate instead of the light detection member 50. In this manner, depending on how the light emitted from the window 13 is utilized (or not utilized), a light emitting module 2 can be realized according to the utilization method by adding components.

[0128] The light-emitting module 1 can be easily used in the sense that a light-emitting module equipped with a light-shielding plate, the light-emitting module 2, and the like can be easily realized from the light-emitting module 1. The light-emitting module 2 can be easily used in the sense that it has a light detection function and can easily control the output of each light.

[0129] The connection member 52 of the light detection member 50 is connected to the housing 10. The connection member 52 is also connected to the cover portion 12 of the housing 10. The connection member 52 is also connected to the window portion 13 of the housing 10. By directly connecting to the window portion 13, it is possible to increase the positional accuracy with respect to the window portion 13. The connection member 52 may be connected to another position on the housing 10, for example, to the second upper surface, etc.

[0130] In the light-emitting module 2, the light-receiving elements 51 of the multiple light-detecting members 50 receive light extracted from different window portions 13. Furthermore, the multiple light-detecting members 50 are connected to different window portions 13. In the illustrated example of the light-emitting module 2, the light-detecting members 50 are connected to the multiple second window portions, respectively. This makes it possible to separately detect the light emitted from each of the multiple light-emitting units 20.

[0131] The light receiving element 51 of the light detection member 50 is disposed facing the exit port 14 of the window portion 13. The light receiving element 51 is irradiated with the light emitted from the exit port 14 of the window portion 13. In the example of the illustrated light-emitting module 1, the area of ​​the light receiving surface of the light receiving element 51 is smaller than the area of ​​the exit port 14 of the window portion 13.

[0132] The area of ​​the light receiving surface of the light receiving element 51 may be the same as or larger than the area of ​​the exit 14 of the window portion 13. The larger the area of ​​the light receiving surface of the light receiving element 51, the wider the range over which the light can be received. On the other hand, the smaller the area of ​​the light receiving surface of the light receiving element 51, the faster the response speed can be. In the example of the light emitting module 1 shown in the figure, priority is given to the response speed rather than the amount of received light.

[0133] <Third embodiment> Next, a light-emitting module 3 according to a third embodiment will be described. Figs. 15 to 19 are diagrams for explaining an exemplary embodiment of the light-emitting module 3. Fig. 15 is a perspective view of the light-emitting module 3. Fig. 16 is a top view of the light-emitting module 3. Fig. 17 is a cross-sectional view taken along the line XVII-XVII in Fig. 16. Fig. 18 is an enlarged view of the window portion 13 surrounded by a dashed line in the cross-sectional view of Fig. 17. Fig. 19 shows a cross-sectional view of a state in which a light-detecting member 50 is connected to the window portion 13, as in the light-emitting module 2 according to the second embodiment.

[0134] The cross-sectional view taken along line XX in Fig. 16 is the same as Fig. 10. The hatched areas in Fig. 19 indicate areas through which light emitted from the light-emitting unit 20 passes. In Fig. 19, hatching of the cross sections of each component is omitted.

[0135] The light-emitting module 3 differs from the light-emitting modules of the previously described embodiments in that a light-guiding section 141 having a lens member 145 is provided in the housing 10. The light-emitting module 3 also differs from the light-emitting modules of the previously described embodiments in that two or more light-guiding sections 141 having different structures are provided in the housing 10. As for the rest, the same configuration as the light-emitting modules of the previously described embodiments can be adopted.

[0136] The light emitting module 3 has one or more light guiding sections 141 each having a lens member 145. The light guiding sections 141 include a light guiding section 141 (a first light guiding section) having a lens member 145 and a light guiding section 141 (a second light guiding section) not having a lens member 145. The light emitting module 3 does not need to have a second light guiding section. For example, all the light guiding sections 141 may be the first light guiding sections.

[0137] (1st light guide part) Lens member 145 of the first light guiding unit is, for example, a condensing lens that condenses light incident on window unit 13. Note that it is not limited to a condensing lens, and for example, a diffusing lens or a collimating lens may be adopted depending on the purpose or application.

[0138] In the first light guiding section, lens member 145 is provided on the incident surface side where light is incident on window portion 13. In the first light guiding section, filter 144 is connected to the incident surface side of light guiding member 142 that guides light to exit port 14, and lens member 145 is connected to the incident surface side of filter 144. Light that has passed through lens member 145 passes through a light guiding path formed by light guiding member 142 and is condensed toward exit port 14. In addition, the condensing point where light that has passed through lens member 145 is condensed is on exit port 14 or outside housing 10.

[0139] (Second light guide) The second light guiding section may employ light guiding section 141 described in connection with light emitting module 1 according to the first embodiment.

[0140] Comparing the first light guiding section and the second light guiding section, the lens surface of lens member 145 of the first light guiding section is larger than the incident surface of the second light guiding section. The area of ​​exit port 14 of the first light guiding section is larger than that of the second light guiding section. Also, the area of ​​the light incident surface at window portion 13 of the first light guiding section is larger than that of the second light guiding section. Also, the light guide path formed by light guiding member 142 of the first light guiding section is larger than that of the second light guiding section. The first light guiding section can ensure a wider area through which light passes than the second light guiding section.

[0141] (Light Emitting Module 3) In the light-emitting module 3, the first light guiding portion is provided in a window portion 13 on the second side surface. Moreover, the multiple window portions 13 provided on the second side surface include a window portion 13 in which the first light guiding portion is provided. Moreover, the multiple window portions 13 provided on the second side surface include a window portion 13 in which the second light guiding portion is provided.

[0142] In addition, in the example of the light-emitting module 3 shown in the figure, a first light-guiding section is provided in a window section 13 that extracts light transmitted through an optical member 30 that has high reflectance over the entirety of a specific wavelength range for light from the light-emitting unit 20.

[0143] In addition, in the example of the light-emitting module 3 shown in the figure, a second light-guiding section is provided in the window section 13 that extracts light transmitted through the optical member 30, which has high reflectance in a part of the specific wavelength range and high transmittance in another part, for light in a specific wavelength range from the light-emitting unit 20.

[0144] In the illustrated example of light-emitting module 3, a first light guiding section is provided for window section 13 that extracts light emitted from one or more light-emitting elements, and a second light guiding section is provided for window section 13 that extracts light whose wavelength has been converted by wavelength conversion member 26. Therefore, one first light guiding section and two second light guiding sections are provided in housing 10.

[0145] For example, when the light receiving surface of the light receiving element 51 is small relative to the light exit 14 of the window 13 as in the light emitting module 2 of the second embodiment, the amount of light irradiated to the light receiving surface can be increased by providing a first light guiding section and concentrating the light on the light receiving surface (see FIG. 19). Furthermore, a greater improvement in the light receiving sensitivity of the light receiving element 51 can be expected by providing a second light guiding section in the second window of the multiple light emitting units 20 that extracts less light.

[0146] In the illustrated example of the light-emitting module 3, the focusing point of the light focused by the lens member 145 of the first light guiding section is set outside the housing 10. For example, as shown in the enlarged view, when the light detection member 50 is provided outside the housing 10, it is preferable to set the focusing point on the light receiving surface of the light receiving element 51 of the light detection member 50. This allows the collimated light incident on the window portion 13 to be effectively received by the light receiving element 51.

[0147] <Fourth embodiment> Next, a light-emitting module 4 according to a fourth embodiment will be described. Fig. 20 to Fig. 22 are drawings for explaining an exemplary embodiment of the light-emitting module 4. Fig. 20 is a perspective view of the light-emitting module 4. Fig. 21 is a top view of the light-emitting module 4. Fig. 22 is a side view of the light-emitting module 4.

[0148] The light-emitting module 4 differs from the light-emitting modules of the previously described embodiments in that it has a plurality of wirings 70, a plurality of connectors 60, and a base plate 80. For the rest, the same configuration as the light-emitting modules of the previously described embodiments can be adopted.

[0149] (Wiring 70) For example, FPC (Flexible Printed Circuits) can be used for the wiring 70. The wiring 70 is film-like, elongated, and flexible. Therefore, even if the wiring 70 is deformed into a bent state, the electrical connection can be maintained. The wiring 70 also has a terminal at the tip.

[0150] (Connector 60) The connector 60 has a first connector portion 61 and a second connector v, each of which is connected to a terminal. The first connector portion 61 and the second connector v face each other. The first connector portion 61 and the second connector portion 62 are electrically connected by a conductive portion 63.

[0151] In addition, in a plan view parallel to the mounting surface on which the connector 60 is mounted, the first connector portion 61 is arranged parallel to a direction (fifth direction) perpendicular to a direction (fourth direction) in which the conductive portion 63 connects the opposing first connector portion 61 and second connector portion 62. In addition, the second connector v is arranged parallel to the fifth direction.

[0152] Moreover, the first connector portion 61 and the second connector portion 62 have a rectangular shape that is elongated in the fifth direction in a plan view parallel to the mounting surface on which the connector 60 is mounted. Moreover, the length of the first connector portion 61 in the fifth direction is greater than the length of the second connector portion 62 in the fifth direction.

[0153] The multiple connectors 60 include two connectors 60 having different lengths of conductive parts 63 connecting the first connector portion and the second connector portion. The difference in length of the conductive parts 63 in the two connectors 60 is greater than the length of the first connector portion 61 in the fourth direction.

[0154] (Base plate 80) The base plate 80 has a flat plate shape. The base plate 80 is made of, for example, a flat epoxy glass plate. Alternatively, the base plate 80 may be made of a flat aluminum plate.

[0155] (Light Emitting Module 4) In the light-emitting module 4, a base plate 80 is disposed on a heat sink 40. In a top view, the base plate 80 is disposed so as to face the side surface of the heat sink 40 on which the light-emitting device 21 is mounted. In a top view, a straight line passing through the side surface of the heat sink 40 is parallel to the side of the base plate 80 facing this side surface.

[0156] In a top view, the distance between the side surface of the heat sink 40 and the base plate 80 is equal to or more than half the length of the shortest wiring 70 among the plurality of wirings 70, and equal to or more than half the length of the longest wiring 70 among the plurality of wirings 70, and is shorter than the length of the shortest wiring 70 among the plurality of wirings 70. By arranging the wirings 70 at this interval, the plurality of wirings 70 can be stably connected.

[0157] The multiple connectors 60 are disposed on the upper surface side of the light-emitting module 4. The multiple connectors 60 are also disposed on the heat sink 40. The multiple connectors 60 are also mounted on a base plate 80. Note that the light-emitting module 4 may be mounted on the upper surface of the heat sink 40 without having the base plate 80. In this case, the light-emitting module 4 does not need to have the base plate 80.

[0158] Each of the multiple connectors 60 is arranged such that, of a first connector portion 61 and a second connector portion 62, the first connector portion 61 is closer to the light emitting device 21. The first connector portion 61 faces a connection port for a terminal toward the second side surface, and the second connector portion 62 faces a connection port for a terminal in the opposite direction.

[0159] The multiple connectors 60 are arranged side by side on the heat sink 40. One light emitting device 21 corresponds to one connector 60, and the multiple connectors 60 are arranged such that the first connector portion 61 of one connector 60 faces the connection portion 23 of one light emitting device 21.

[0160] Among the multiple connectors 60 arranged side by side, adjacent connectors 60 have different lengths of conductive portions 63. Furthermore, adjacent connectors 60 are arranged such that their first connector portions 61 are shifted in the fourth direction. In other words, the first connector portions 61 of adjacent connectors 60 are not arranged on a straight line parallel to the fifth direction.

[0161] Therefore, in adjacent connectors 60, the distance between the first connector portion 61 of one connector 60 and the connection portion 23 of the light emitting device 21 corresponding to this connector 60 is longer than the distance between the first connector portion 61 of the other connector 60 and the connection portion 23 of the light emitting device 21 corresponding to this connector 60. In addition, this difference in distance is at least greater than the length of the first connector portion 61 in the fourth direction.

[0162] On the other hand, adjacent connectors 60 are arranged without shifting their second connector portions 62 in the fourth direction. In other words, the second connector portions 62 of adjacent connectors 60 are arranged on a straight line parallel to the fifth direction.

[0163] Therefore, the distance between the second connector portion 62 of one of adjacent connectors 60 and the connection portion 23 of the light-emitting device 21 corresponding to this connector 60, and the distance between the second connector portion 62 of the other connector 60 and the connection portion 23 of the light-emitting device 21 corresponding to this connector 60, are the same, or the difference therebetween is at least smaller than the length of the second connector portion 62 in the fourth direction.

[0164] Since the length in the fifth direction of the first connector portion 61 is longer than that of the second connector portion 62, this arrangement allows the multiple connectors 60 to be arranged at shorter intervals. This makes it possible to reduce the area required for arranging the multiple connectors 60.

[0165] The interval between adjacent connectors 60 is shorter than both half the length in the fifth direction of the first connector portion 61 and half the length in the fifth direction of the second connector portion 62. Furthermore, the shorter this interval can be made, the smaller the area for arranging multiple connectors 60 becomes.

[0166] The multiple connectors 60 of the light-emitting module 4 include one or more first connectors and one or more second connectors. The number of the first connectors is the same as the number of the second connectors. For example, the illustrated light-emitting module 4 has a total of six connectors 60, including three first connectors and three second connectors. The number of the first connectors and the number of the second connectors is the same as the number of the light-emitting units 20.

[0167] The wiring 70 is connected to the corresponding light emitting device 21 and connector 60. The plurality of wirings 70 electrically connect the plurality of light emitting devices 21 and the plurality of connectors 60. A terminal of the wiring 70 is connected to a first connector portion 61 of the connector 60. The wiring 70 is also connected to the connection portion 23 of the light emitting device 21. For example, the wiring 70 is connected to a first surface (wiring mounting surface) of the connection portion 23.

[0168] In the light-emitting module 4, the first connector parts 61 are offset to reduce the size, while the second connector parts 62 are aligned to provide a light-emitting module that is easy to connect to external terminals. This reduces the design burden when manufacturing a device equipped with the light-emitting module 4.

[0169] The light-emitting module 4 is provided with a connector, and can be said to be an easy-to-use light-emitting module in that electrical connection to each light-emitting device 21 can be easily achieved by connecting to the connector.

[0170] <Fifth embodiment> Next, a light-emitting module 5 according to a fifth embodiment will be described. Fig. 23 and Fig. 24 are diagrams for explaining an exemplary embodiment of the light-emitting module 5. Fig. 23 is a perspective view of the light-emitting module 5. Fig. 24 is a top view of the light-emitting module 5.

[0171] The light emitting module 5 according to the fifth embodiment, like the light emitting module 4 according to the fourth embodiment, represents another example of a light emitting module in which the area for arranging the multiple connectors 60 can be reduced. Furthermore, the light emitting module 5 according to the fifth embodiment differs from the light emitting module 4 according to the fourth embodiment in that the light emitting module 5 is realized by using multiple connectors 60 having the same length of the conductive portions 63.

[0172] In the light-emitting module 5, in a top view, a plurality of connectors 60 are alternately arranged along the fifth direction in two regions separated by a boundary line that extends in the fifth direction. Of the two regions, the connector 60 arranged in the region closer to the light-emitting device 21 is arranged so that the second connector portion 62 is close to the boundary line, and the connector 60 arranged in the region farther from the light-emitting device 21 is arranged so that the first connector portion 61 is close to the boundary line.

[0173] In the light-emitting module 5, one base plate 80 is provided for one connector 60, and the same number of base plates 80 as the number of connectors 60 are arranged. Note that multiple connectors 60 may be arranged on one base plate 80, and the connectors 60 may be mounted on the heat sink 40 without a base plate 80.

[0174] In this way, by using the same connector 60, common parts can be used, and the manufacturing process of the light emitting module can be simplified.

[0175] Although the embodiments of the present invention have been described above, the light-emitting device of the present invention is not strictly limited to the light-emitting device of the embodiment. In other words, the present invention can be realized without being limited to the external shape and structure of the light-emitting device disclosed in the embodiment. In addition, the present invention can be applied without necessarily having all the components. For example, if some of the components of the light-emitting device disclosed in the embodiment are not described in the claims, the freedom of design by those skilled in the art, such as substitution, omission, modification of the shape, and change of the material, is recognized for those some components, and the invention described in the claims is specified to be applied. [Industrial Applicability]

[0176] The light emitting device described in each embodiment can be used as a medical light source for an endoscope or the like, a projector, lighting, a display, and the like. [Explanation of symbols]

[0177] 1, 2, 3, 4, 5 Light Emitting Module 10. Chassis 11 Base 110 Placement area 112, 114 Top surface 12 Lid 121, 123 Top surface 13 Window section 14 Exit port 140 Translucent material 141 Light guide section 142 Light guide member 143 Connection parts 144 Filters 145 Lens parts 15 Connection hole 20 Light Emitting Unit 21 Light emitting device 22 Light emitting part 23 Connection 24 Optical components (condenser lenses) 25 Optical components (diffuser plate) 26 Wavelength conversion material (phosphor wheel) 261 Wavelength conversion unit 262 Conversion control section 27 Protective materials 271 Connection 272 Protection Department 28 Optical components (collimating lenses) 30 Optical components (dichroic mirror) 40 Heat sink 50 Light detection member 51 Photodetector 52 Connection parts 60 Connectors 61 First connector part 62 Second connector part 63 Conductive Part 70 Wiring (flexible circuit board) 80 Base Plate

Claims

1. a first light emitting unit having one or more first light emitting elements and emitting a first light; A second light emitting unit having one or more second light emitting elements and emitting a second light having a peak wavelength different from that of the first light; a first optical member that reflects a portion of the first light and transmits a portion of the first light; a second optical member that reflects a portion of the second light and transmits a portion of the second light; a housing that surrounds the first light emitting unit, the second light emitting unit, the first optical member, and the second optical member, The housing is a light-emitting module having a first window portion that extracts the first light and the second light traveling in a predetermined direction through the first optical member and the second optical member, a second window portion that extracts the first light traveling in a direction different from the predetermined direction through the first optical member, and a third window portion that extracts the second light traveling in a direction different from the predetermined direction through the second optical member.

2. The light emitting module according to claim 1, wherein the first light emitting unit comprises a plurality of the first light emitting elements, a focusing lens that focuses light emitted from the plurality of the first light emitting elements, a wavelength conversion member into which the focused light is incident, and a collimating lens that collimates the first light emitted by the wavelength conversion member.

3. The light-emitting module according to claim 1 or 2, wherein the second light-emitting unit comprises a plurality of the second light-emitting elements, a focusing lens for focusing the second light emitted from the plurality of the second light-emitting elements, a diffusion plate for diffusing the focused second light, and a collimating lens for collimating the diffused second light.

4. The light-emitting module described in any one of claims 1 to 3, wherein the housing has a base on which the first light-emitting unit, the second light-emitting unit, the first optical member, and the second optical member are arranged, and a lid portion that surrounds the first light-emitting unit, the second light-emitting unit, the first optical member, and the second optical member arranged on the base and has the first window portion, the second window portion, and a third window portion.

5. a first light detection member that detects the first light emitted from the second window portion; The light-emitting module according to claim 4 , wherein the second window portion is provided between the first light-detecting member and the first light-emitting unit.

6. a second light detection member that detects the second light emitted from the third window portion; The third window portion is provided between the second light detection member and the second light emitting unit. The light emitting module according to claim 4 , wherein the cover portion has the first window portion on a first surface, and the second window portion and the third window portion on a second surface that is different from the first surface.

7. The light-emitting module according to claim 6, wherein the area of ​​the exit of the first window portion, which serves as a light extraction port, is larger than both the area of ​​the exit of the second window portion, which serves as a light extraction port, and the area of ​​the exit of the third window portion, which serves as a light extraction port.

8. the third window portion has a condenser lens that condenses light incident on the third window portion, The light emitting module according to claim 1 , wherein the second window portion does not have a condenser lens.

9. The light-emitting module described in any one of claims 1 to 8, wherein the housing extracts the first light reflected through the first optical member and the second light reflected through the second optical member from the first window portion, extracts the first light transmitted through the first optical member from the second window portion, and extracts the second light transmitted through the second optical member from the third window portion.

10. a plurality of connectors each having a first connector portion, a second connector portion, and a conductive portion connecting the first connector portion and the second connector portion; In the plurality of connectors, the first connector portion is longer than the second connector portion in a direction perpendicular to a direction in which the conductive portion connects the first connector portion and the second connector portion, the plurality of connectors include a first connector and a second connector, the conductive portions of which have different lengths; The light emitting module according to claim 1 , wherein the first connector and the second connector are arranged side by side, and the first connector portions are arranged offset from each other in a direction in which the conductive portions are connected.

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